timing structure and frame in an integrated access backhaul network (iab)

专利摘要:
These are wireless communications systems and methods related to wireless communication in an integrated access backhaul (IAB) network. A first wireless communication device receives synchronization information associated with one or more wireless relay devices. The first wireless communication device sets one or more synchronization references from the first wireless communication device based on at least a subset of the received synchronization information. The first wireless communication device communicates, with one or more wireless relay devices, communication signals in synchronization with one or more adjusted synchronization references, where at least one of the communication signals includes backhaul data.
公开号:BR112020006477A2
申请号:R112020006477-7
申请日:2018-10-09
公开日:2020-09-29
发明作者:Navid Abedini；Junyi Li；Karl Georg Hampel；Hong Cheng；Jianghong LUO；Juergen Cezanne；Muhammad Nazmul Islam；Sundar Subramanian
申请人:Qualcomm Incorporated；
IPC主号:

专利说明:

[0001] [0001] This application claims priority and benefit to Patent Application No. US 16 / 154,500, filed on October 8, 2018, and Provisional Patent Application No. 62 / 570,003, filed on October 9, 2017, which are incorporated into this document as a reference in its entirety as if it were fully established below and for all applicable purposes. TECHNICAL FIELD
[0002] [0002] This request refers, in general, to wireless communication systems, and more particularly, the communication of access data and backhaul data through wireless links in an integrated access backhaul network (IAB). The technology modalities can enable and provide solutions and techniques for wireless communication devices (for example, base stations and user equipment devices (UEs)) in an IAB network to maintain synchronization and determine the time lines for transmission and / or reception and frameworks for communications. INTRODUCTION
[0003] [0003] Wireless communications systems are widely installed to provide various types of communication content such as voice, video, data packets, messages, broadcast, and so on. These systems may be able to support communication with multiple users by sharing available system resources (for example, time, frequency and power). Examples of such multiple access systems include code division multiple access systems (CDMA), time division multiple access systems (TDMA), frequency division multiple access systems (FDMA) and multiple access systems by orthogonal frequency division (OFDMA), (for example, a Long Term Evolution (LTE) system). A wireless multiple access communications system can include numerous base stations (BSs), each simultaneously supporting communication to multiple communication devices, which may otherwise be known as user equipment (UE).
[0004] [0004] To satisfy the growing demands for expanded broadband connectivity, wireless communication technologies are advancing from LTE technology to a new generation (NR) radio technology (56). 5G NR can provision access traffic and backhaul traffic at gigabit level productivity. Access traffic refers to traffic between an access node (for example, a base station) and an UE. Backhaul traffic refers to traffic between access nodes and a main network. BRIEF SUMMARY OF SOME EXAMPLES
[0005] [0005] The following summarizes some aspects of the present disclosure to provide a basic understanding of the technology discussed. This summary is not an extensive overview of all the contemplated features of the disclosure, and is not intended to identify key or critical elements of all aspects of the disclosure or to outline the scope of any or all aspects of the disclosure. Its sole purpose is to present some concepts of one or more aspects of the revelation in a summarized form as a prelude to the more detailed description that is presented later.
[0006] [0006] The modalities of the present disclosure provide mechanisms for communication in an integrated access backhaul (IAB) network that employs a multiple hop topology (for example, a spanning tree) to carry radio access traffic and traffic from backhaul. For example, a BS or UE can function as a relay node (for example, a parent node or a child node) and at least one BS in direct communication with a main network can function as a root node. A relay node can exchange synchronization information with one or more other relay nodes, adjust an internal synchronization reference, and / or determine transmit and / or receive timelines and / or frame structures (for example, loop and cyclic prefixes (CPs) to communicate radio access traffic and / or backhaul traffic with one or more other relay nodes.
[0007] [0007] For example, in one aspect of disclosure, a wireless communication method includes receiving, via a wireless communication device, synchronization information associated with one or more wireless relay devices. The method includes adjusting, via the first wireless communication device, one or more synchronization references from the first wireless communication device based on at least a subset of the received synchronization information. The method includes communicating, via the first wireless communication device with one or more wireless relay devices, communication signals in synchronization with one or more adjusted synchronization references, wherein at least one of the communication signals includes data backhaul.
[0008] [0008] In an additional aspect of disclosure, a wireless communication method includes receiving, through a central entity of one or more wireless relay devices, synchronization information associated with one or more wireless relay devices. The method includes determining, through the central entity, a synchronization reference setting for a first wireless relay device of one or more wireless relay devices based on at least a subset of the received synchronization information. The method includes transmitting, through the central entity, a message that instructs the first wireless relay device of one or more wireless relay devices to synchronize a communication with a second wireless relay device of the one or more wireless relay devices. based on the synchronization reference setting.
[0009] [0009] In an additional aspect of the disclosure, an apparatus includes a transceiver configured to receive synchronization information associated with one or more wireless relay devices. The processor additionally includes a processor configured to set one or more synchronization references from the device based on at least a subset of the received synchronization information. The transceiver is additionally configured to communicate, with one or more wireless relay devices, communication signals in synchronization with one or more adjusted synchronization references, wherein at least one of the communication signals includes backhaul data.
[0010] [0010] In an additional aspect of the disclosure, a device includes a transceiver configured to receive, from one or more wireless relay devices, synchronization information associated with one or more wireless relay devices. The apparatus additionally includes a processor configured to determine a synchronization reference setting for a first wireless relay device from one or more wireless relay devices based on at least a subset of the received synchronization information. The transceiver is further configured to transmit a message that instructs the first wireless relay device of the one or more wireless relay devices to synchronize communication with a second wireless relay device of the one or more wireless relay devices based in the synchronization reference setting.
[0011] [0011] Other aspects, resources and modalities of the present invention will become evident to those skilled in the art, by reviewing the following description of specific exemplary modalities of the present invention in conjunction with the attached Figures. Although the features of the present invention can be discussed in relation to certain embodiments and figures below, all of the embodiments of the present invention can include one or more of the advantageous features discussed in this document. In other words, although one or more modalities can be discussed as having certain "advantageous features, one or more of such features can also be used in accordance with the various embodiments of the invention discussed herein. Similarly, although the exemplary modalities can be discussed below as device, system or method modalities, it should be understood that such exemplary modalities can be deployed in various devices, systems and methods. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] [0012] Figure 1 illustrates a wireless communication network according to the modalities of the present disclosure.
[0013] [0013] Figure 2 illustrates an integrated access backhaul network (IAB) according to the modalities of the present disclosure.
[0014] [0014] Figure 3 illustrates an IAB network according to the modalities of the present disclosure.
[0015] [0015] Figure 4 illustrates an IAB network topology according to the modalities of the present disclosure.
[0016] [0016] Figure 5 illustrates a method of sharing the IAB network resource according to the modalities of the present disclosure.
[0017] [0017] Figure 6 is a block diagram of an exemplary user equipment (UE) according to the modalities of the present disclosure.
[0018] [0018] Figure 7 is a block diagram of an exemplary base station (BS) according to the modalities of the present disclosure.
[0019] [0019] Figure 8 is a timing diagram that illustrates a programming method for a wireless access network according to the modalities of the present disclosure.
[0020] [0020] Figure 9 is a timing diagram that illustrates a programming method for an IAB network according to the modalities of the present disclosure.
[0021] [0021] Figure 10 is a timing diagram that illustrates a programming method for an IAB network according to the modalities of the present disclosure.
[0022] [0022] Figure 11 is a signaling diagram that illustrates an IAB communication method according to the modalities of the present disclosure.
[0023] [0023] Figure 12 is a signaling diagram that illustrates an IAB communication method according to the modalities of the present disclosure.
[0024] [0024] Figure 13 illustrates a method of distributed synchronization according to the modalities of the present disclosure.
[0025] [0025] Figure 14 illustrates a method of transmission of centralized synchronization method according to the modalities of the present disclosure.
[0026] [0026] Figure 15 is a signaling diagram that illustrates a method of distributed synchronization according to the modalities of the present disclosure.
[0027] [0027] Figure 16 is a signaling diagram that illustrates a centralized synchronization method according to the modalities of the present disclosure.
[0028] [0028] Figure 17 illustrates a wireless backhaul network according to the modalities of the present disclosure.
[0029] [0029] Figure 18 illustrates an overlap of traffic routing in a wireless backhaul network according to the modalities of the present disclosure.
[0030] [0030] Figure 19 illustrates a synchronization overlay in a wireless backhaul network according to the modalities of the present disclosure.
[0031] [0031] Figure 20 illustrates a synchronization overlay on a wireless backhaul network according to the modalities of the present disclosure.
[0032] [0032] Figure 21 is a signaling diagram illustrating an IAB communication method in accordance with the modalities of the present disclosure.
[0033] [0033] Figure 22 is a flow diagram of a method for communicating over an IAB network according to the modalities of the present disclosure.
[0034] [0034] Figure 23 is a flow diagram of a method for managing synchronization references in an IAB network according to the modalities of the present disclosure. DETAILED DESCRIPTION
[0035] [0035] The detailed description set out below, together with the accompanying drawings, is intended as a description of various configurations and is not intended to represent the only configurations in which the concepts described in this document can be practiced. The detailed description includes specific details for the purpose of providing a complete understanding of the various concepts. However, it will be evident to those skilled in the art that these concepts can be practiced without these specific details. On some occasions, well-known structures and components are shown in the form of a block diagram to avoid obscuring such concepts.
[0036] [0036] The techniques described in this document can be used for various wireless communication networks. These networks may include code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), single carrier FDMA ( SC-FDMA) and other networks. The terms "network" and "system" are often used interchangeably. A CDMA network can deploy radio technology such as Universal Terrestrial Radio Access (UTRA), cama2000, etc. UTRA includes Broadband CDMA (WCDMA) and other CDMA variants. cdma2000 covers IS-2000, I1IS-95 and IS-856 standards. A TDMA network can deploy radio technology like the Global System for Mobile Communications (GSM). An OFDMA network can deploy radio technology such as Evolved UTRA (E-UTRA), Ultra-Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDMA, etc. UTRA and E-UTRA are part of the Mobile Telecommunication System
[0037] [0037] The present disclosure describes mechanisms and techniques for communicating over an IAB network. An IAB network can include a combination of wireless access links between BSs and UEs and wireless backhaul links between BSs. The IAB network can employ a multiple hop topology (for example, a spanning tree) to carry access traffic and backhaul traffic. One of the BSs can be configured with a fiber optic connection in communication with a main network. In some scenarios a BS can act as an anchoring node (for example, a root node) to carry backhaul traffic between a main network and the IAB network. In other scenarios, a BS may serve as a central node in combination with connections to a main network. And in some arrangements, BSs and UEs can be referred to as relay nodes in the network.
[0038] [0038] BSs can serve a variety of roles in a static or dynamic nature. For example, each BS can have one or more parent nodes. These parent nodes can include other BSs. BSs can have one or more child nodes, which can include other BSs and / or UEs. UEs can function as child nodes. Parent nodes can act as access nodes to child nodes. Parent nodes can be referred to as access functionality nodes (ACF). Child nodes can function as UEs for parent nodes and can be referred to as UE functionality nodes (UEF). BSs can function as an ACF node when communicating with a child node and can function as an UEF node when communicating with a parent node. The disclosed modalities generally provide signaling mechanisms for nodes on an IAB network to maintain synchronization and determine transmission and / or receiving time lines and frame structures for communications. Given a variety of topological dispositions of IAB networks and restrictions / demands placed on a network synchronization it helps the general network functions and the performance for positive user experiences.
[0039] [0039] In one embodiment, a retransmission node can maintain and track one or more synchronization references for communications on a network. A synchronization reference can be an internal reference on a node or an external reference such as a global positioning system (GPS) connected to the node. Relay nodes can exchange synchronization information,
[0040] [0040] In one embodiment, when a relay node functions as an ACF node, the relay node can determine or use a number of parameters. These can include gap periods, transmission delay, receive delay and / or cyclic prefix (CP) mode (for example, a normal CP mode or an extended CP mode (ECP)) to communicate with Corresponding UEF. In one embodiment, a central entity can determine adjustment information that includes gap periods, transmit timing adjustment, receive time adjustment and / or CP mode for the relay nodes to communicate with each other and can provide the adjustment information relay nodes.
[0041] [0041] The technology aspects discussed in this document can provide several benefits. For example, the use of ACF-UEF relationships between the relay nodes can leverage at least some of the current LTE technologies, such as programming mechanisms and timing advances. The use of multiple synchronization references and exchange of synchronization information allows the nodes to synchronize with one another and synchronize to a reliable synchronization source (for example, a GPS). The flexibility if selecting between an ECP mode, a gap period insertion and / or a transmission and / or receive timing adjustment can avoid interference and can increase resource efficiency. These and other benefits are more fully recognized and discussed below.
[0042] [0042] Figure 1 illustrates a wireless communication network 100 according to the modalities of the present disclosure. Network 100 includes a plurality of BSs 105, a plurality of UEs 115 and a main network
[0043] [0043] BSs 105 can communicate wirelessly with UEs 115 through one or more BS antennas. Each BS 105 can provide communication coverage for a respective geographic coverage area 110. In 3GPP, the term “cell” can refer to that specific geographical coverage area of a BS and / or a BS subsystem that serves the area of coverage, depending on the context in which the term is used. In the example shown in Figure 1, BSs 105a, 105b, 105c, 105d and 105e are examples of macro BSs for coverage areas 110a, 110b, 1110c, 110d and 110e,
[0044] [0044] The communication links 125 shown on network 100 may include uplink (UL) transmissions from a UE 115 to a BS 105 or downlink transmissions (DL) from a BS 105 to a UE 115. The links from communication 125 are referred to as wireless access links. UEs 115 can be dispersed over 100 and each UE 115 can be stationary or mobile. A UE 115 can also be referred to as a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communications device , a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a customer or some other suitable terminology. An UE 115 can also be a cell phone, a personal digital assistant (PDA), a wireless modem, a wireless communication device, a portable device, a tablet computer, a laptop computer, a cordless phone , a personal electronic device, a portable device, a personal computer, a wireless local loop station (WLL), an Internet of Things (IoT) device, an Internet of Everything (IoE) device, an Internet communication device machine (MTC), an instrument, an automobile, or the like.
[0045] [0045] BSs 105 can communicate with the main network 130 and with one another through fiber optic links 134. The main network 130 can provide user authentication, access authorization,
[0046] [0046] Each BS 105 can also communicate with several UEs 115 through a number of other BSs 105, where BS 105 can be an example of an intelligent radio header. In alternative configurations, several functions of each BS 105 can be distributed across several BSs 105 (for example, radio headers and access network controllers) or consolidated into a single BS 105.
[0047] [0047] In some deployments, network 100 uses orthogonal frequency division multiplexing (OFDM) on the downlink and single carrier frequency division multiplexing (SC-FDM) at UL. OFDM and SC-FDM divide the system's bandwidth into multiple (K) orthogonal subcarriers, which are also commonly referred to as tones, intervals or the like. Each subcarrier can be modulated with data. In general, the modulation symbols are sent in the frequency domain with OFDM and in the time domain with SC-FDMA. The spacing between adjacent subcarriers can be fixed, and the total number of subcarriers (K) can be dependent on the system's bandwidth. The system bandwidth can also be divided into sub-bands.
[0048] [0048] In one embodiment, BSs 105 can assign or schedule transmission resources (for example, in the form of time frequency resource blocks) for DL and UL transmissions on network 100. DL refers to the transmission direction of a BS 105 to a UE 115, while UL refers to the direction of transmission from a UE 115 to a BS
[0049] [0049] DL subframes and UL subframes can be further divided into several regions. For example, each DL or UL subframe can have predefined regions for transmitting reference signals, control information, and data. Reference signals are predetermined signals that facilitate communications between BSs 105 and UEs 115. For example, a reference signal can have a specific pattern or pilot structure, where pilot tones can span a bandwidth or bandwidth operating frequency, each positioned at a predefined time and a predefined frequency. For example, a BS 105 can transmit cell-specific reference signals (CRSs) and / or channel status information reference signals (CSI-RSs) to enable a UE 115 to estimate a DL channel. Similarly, an UE 115 can transmit audible reference signals (SRSs) to enable a BS 105 to estimate an UL channel. Control information can include resource assignments and protocol controls. The data may include protocol data and / or operational data. In some embodiments, BSs 105 and UEs 115 can communicate with the use of self-contained subframes. A self-contained subframe can include a portion for DL communication and a portion for UL communication. A self-contained subframe can be DL centric or UL centric. A centric subframe in DL can include a longer duration for DL communication than UL communication. A centric subframe in UL can include a longer duration for UL communication than UL communication.
[0050] [0050] In one embodiment, a UE 115 that attempts to access network 100 can perform an initial cell search by detecting a primary sync signal (PSS) from a BS 105. The PSS can enable period synchronization and can indicate a physical layer identity value.
[0051] [0051] Figure 2 illustrates a network of IAB 200 according to the modalities of the present disclosure. Network 200 is substantially similar to network 100. For example, BSs 105 communicate with UEs 115 via wireless access links 125. However, on network 200, only one BS (for example, BS 105c) is connected to a fiber optic backhaul link 134. The other BSs 105a, 105b, 105d and 105e communicate wirelessly with each other and with BS 105c via wireless backhaul links 234. BS 105c connected to the link fiber optic backhaul 134 can act as an anchor for the other BSs 105a, 105b, 105d and 105e to communicate with the main network 130, as described in more detail herein. Wireless access links 125 and wireless backhaul links 234 can share resources for communications on network 200. Network 200 can also refer to an auto-backhaul network. Network 200 can enhance wireless linkability, reduce latency and reduce deployment costs.
[0052] [0052] Figure 3 illustrates a network of IAB 300 according to the modalities of the present disclosure. Network 300 is similar to network 200 and illustrates the use of millimeter wave frequency band (mmWav) for communications. In network 300, a single BS (for example, BS 105c) is connected to a fiber optic backhaul link 134. The other BSs 105a, 105b, 105d and 105e communicate with each other and with BS 105c using directional beams 334, for example, through wireless links 234. BSs 105 can also communicate with UEs 115 using narrow directional beams 325, for example, through wireless links 125. Directional beams 334 can be substantially similar to directional beams 325. For example, BSs 105 may use analog beam formation and / or digital beam formation to form directional beams 334 and 325 for transmission and / or receiving. Similarly, UES 115 may use analog cue formation and / or digital beam formation to form directional beams 325 for transmission and / or receiving. The use of mmmWav can increase network productivity and reduce latency. The use of narrow directional beams 334 and 325 can minimize the interface between links. Then, network 300 can improve system performance.
[0053] [0053] Figure 4 illustrates a network topology of IAB 400 according to the modalities of the present disclosure. Topology 400 can be used by networks 200 and 300. For example, BSs 105 and UEs 115 can be configured to form a logical spanning tree configuration as shown in topology 400 to communicate access traffic and / or traffic backhaul. Topology 400 may include an anchor 410 coupled to a fiber optic link 134 for communication with a main network (for example, main network 130). Anchor 410 can correspond to BS 105c in networks 200 and 300.
[0054] [0054] Topology 400 includes a plurality of logic levels 402. In the example in Figure 4, the topology
[0055] [0055] Nodes (for example, BSs 105) at level 402a can function as relays for nodes at level 402b, for example, to relay backhaul traffic between nodes and anchor 410. Similarly, nodes (for example , BSs 105) at level 402b can function as relays for nodes at level 402c. For example, nodes at level 402a are parent nodes to nodes at level 402b, and nodes at level 402c are child nodes relative to nodes at level 402b. Parent nodes can function as ACF nodes and child nodes can function as UEF nodes.
[0056] [0056] For example, a BS 105 can deploy both ACF and UEF and can function as an ACF node and an UEF node depending on which node the BS is communicating with. For example, a BS 105 (shown as standard filled) at level 402b can function as an access node when communicating with a BS 105 or UE 115 at level 402c. Alternatively, BS 105 can function as a UE when communicating with a BS 105 at level 402a.
[0057] [0057] Figure 5 illustrates an IAB 500 network resource sharing method according to the modalities of the present disclosure. Method 500 illustrates the resource partition for use in topology 400. In Figure 5, the geometric axis x represents time in some constant units. Method 500 divides resources in an IAB network (for example, networks 200 and 300) by time into resources 510 and 520. Resources 510 and 520 can include time frequency resources. For example, each 510 or 520 resource can include a number of symbols (for example, OFDM symbols) in time and a number of subcarriers in frequency. In some embodiments, each 510 or 520 resource shown can correspond to a subframe, partition, or transmission time slot (TTI), which can load a media access control layer (MAC) transport block.
[0058] [0058] As an example, method 500 can allocate resources 510 to links 404a and 404c in topology 400 to communicate UL and / or DL traffic. Method 500 can assign resources 520 to links 404b in topology 400 to communicate UL and / or DL traffic. The alternating time allocation of resources in method 500 can reduce interference between the different 402 levels, overcome the half-duplex constraint and reduce the transmit-receive gap periods.
[0059] [0059] Figure 6 is a block diagram of an exemplary UE 600 according to the modalities of the present disclosure. UE 600 can be UE 115 as discussed above. As shown, the UE 600 can include a processor 602, a memory 604, an IAB communication module 608, a transceiver 610 that includes a modem subsystem 612 and a radio frequency (RF) unit 614 and one or more antennas 616. These elements can be in direct or indirect communication with each other, for example, through one or more buses.
[0060] [0060] Processor 602 may include a central processing unit (CPU), a digital signal processor (DSP), an application specific integrated circuit (ASIC), a controller, a field programmable port arrangement device (FPGA ), another hardware device, a firmware device, or any combination thereof configured to perform the operations described in this document. The processor 602 can also be deployed as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
[0061] [0061] Memory 604 can include a cache memory (for example, a 602 processor cache memory), random access memory (RAM), magnetoresistive RAM (MRAM), read-only memory (ROM), memory only programmable read (PROM), programmable and erasable read-only memory (EPROM), electrically programmable and erasable read-only memory (EEPROM), flash memory, solid state memory device, hard disk drives, other forms of volatile memory or non-volatile or a combination of different types of memory. In one embodiment, memory 604 includes a non-transitory, computer readable medium. Memory 604 can store instructions 606. Instructions 606 can include instructions that, when executed by processor 602, cause processor 602 to perform the operations described in this document with reference to UEs 115 in connection with the modalities of the present disclosure. Instructions 606 can also be referred to as a code. The terms "instructions" and "code" must be interpreted widely to include any type of statement (or statements) that is computer readable. For example, the terms "instructions" and "code" can refer to one or more programs, routines, subroutines, functions, procedures, etc. The "instructions" and "code" can include a single computer-readable statement or many computer-readable statements.
[0062] [0062] The IAB 608 communication module can be implemented using hardware, software or combinations thereof. For example, the IAB 608 communication module can be deployed as a processor, circuit and / or instructions 606 stored in memory 604 and executed by processor 602. The IAB 608 communication module can be used for various aspects of the present disclosure. For example, the IAB 608 communication module is configured to maintain multiple synchronization references, provide synchronization information (for example, which includes timing and / or frequency) associated with synchronization references to the other nodes (for example, the BSs 105), receive synchronization information from the other nodes, receive synchronization adjustment commands, receive programming information (for example, gap periods, transmission delay and / or receive delay), adjust synchronization references based on information from synchronization received and / or commands received and / or communicate with other nodes based on the programming information received, as described in more detail in this document.
[0063] [0063] As shown, transceiver 610 may include modem subsystem 612 and RF unit
[0064] [0064] The RF 614 unit can provide the modulated and / or processed data, for example, data packets (or, more generally, data messages that may contain one or more data packets and other information), for the 616 antenna for transmission to one or more other devices. This may include, for example, transmission of reserve signals, reserve response signals and / or any communication signal in accordance with the terms of the present disclosure. The 616 antennas can additionally receive data messages transmitted from other devices. These may include, for example, receiving synchronization information, synchronization adjustment commands and / or programming adjustment information according to the modalities of the present disclosure. Antennas 616 can provide the received data messages for processing and / or demodulation on transceiver 610. Antennas 616 can include multiple antennas of similar or different designs in order to support multiple transmission links. The RF unit 614 can configure the 616 antennas
[0065] [0065] Figure 7 is a block diagram of an exemplary BS 700 according to the modalities of the present disclosure. The BS 700 can be a BS 105 as discussed above. As shown, BS 700 can include a processor 702, a memory 704, an IAB 708 communication module, a transceiver 710 that includes a modem subsystem 712 and an RF unit 714 and one or more antennas 716. These elements can be in direct or indirect communication with each other, for example, through one or more buses.
[0066] [0066] The 702 processor can have several features like a specific type processor. For example, this may include a CPU, DSP, ASIC, controller, device, other hardware device, firmware device, or any combination of these configured to perform the operations described in this document. The processor 702 can also be deployed as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
[0067] [0067] Memory 704 can include a cache memory (for example, a 702 processor cache memory), RAM, MRAM, ROM, PROM, EPROM, EEPROM, flash memory, a solid state memory device, one or more hard drives, minristor-based arrangements, other forms of volatile or non-volatile memory, or a combination of different types of memory. In some embodiments, memory 704 may include a non-transitory, computer readable medium. Memory 704 can store 706 instructions. Instructions 706 can include instructions that, when executed by processor 702, cause processor 702 to perform operations described in this document. Instructions 706 can also be referred to as code, which can be interpreted broadly to include any type of definition (or definitions) computer readable as discussed above in relation to the Figure
[0068] [0068] The IAB 708 communication module can be implemented using hardware, software or combinations thereof. For example, the IAB 708 communication module can be deployed as a processor, circuit and / or 706 instructions stored in memory 604 and executed by processor 702. The IAB 708 communication module can be used for various aspects of the present disclosure. For example, the IAB 708 communication module is configured to maintain multiple synchronization references, provides synchronization information (for example, which includes timing and / or frequency) associated with synchronization references for other nodes (for example, BSs 105 and UEs 115 and 600), receive synchronization information from other nodes, receive synchronization adjustment commands, adjust synchronization references based on received synchronization information or received commands, receive scheduling information (for example, gap periods , transmission timing and / or receiving timing) for communicating with nodes at a higher level (for example, less hops away from an anchor 410 than BS 700), determining scheduling information for communicating with nodes at a lower level ( for example, more hops away from an anchor 410 than BS 700) and / or communicating with us based on the programming information received and the information determined programming information, as described in more detail in this document.
[0069] [0069] As shown, transceiver 710 can include modem subsystem 712 and RF unit
[0070] [0070] The RF unit 714 can provide the modulated and / or processed data, for example, data packets (or, more generally, data messages that may contain one or more data packets and other information), for the antenna 716 for transmission to one or more other devices. This may include, for example, the transmission of information to complete the attachment to a network and communication with a UE 115 camped in accordance with the modalities of the present disclosure. Antennas 716 can additionally receive data messages transmitted from other devices and provide the received data messages for processing and / or demodulation on transceiver 710. Antennas 716 can include multiple antennas of similar or different designs in order to support multiple transmission links .
[0071] [0071] Figures 8 to 10 illustrate several timelines for communicating via wireless access links (for example, wireless access links 125) and wireless backhaul links (for example, wireless backhaul links 234). In Figures 8 to 10, the geometric axes x represent time in some constant units. The illustrated timelines establish how various methods of the method can be implemented and are described in detail below.
[0072] [0072] Figure 8 is a timing diagram that illustrates a programming method 800 for a wireless access network according to the modalities of the present disclosure. Method 800 can be employed by a BS (for example, BSs 105) to communicate with a UE
[0073] [0073] Method 800 generally shows BS / UE communications through the vertical lines shown in the drawings. As shown, in method 800, BS can transmit DL 810 signals to the UE, for example, based on a BS timing reference (for example, as shown by the DL (Tx) 802 transmission timeline) . The UE can receive the DL 810 signals after a propagation delay 830 as shown by the DL (Rx) 804 receiving timeline. The UE can transmit UL 820 signals to the BS, for example, based on a reference provided by BS as shown by the UL 806 Tx timeline.
[0074] [0074] To determine a schedule for the UE, the BS can estimate a round trip time (RTT) 832 between the BS and the UE, for example, based on a random access procedure. The propagation delay 830 can correspond to half of RTT 832. The BS can transmit a timing advance (TA) command to the UE instructing the UE to transmit at a time prior to an expected programmed transmission time. The UE is expected to track the DL timing of the BS and adjust the UL timing of the UE based on the DL timing. For example, BS can program the UE to transmit at a specific time according to the 802 timeline. The UE can transmit at a time prior to the programmed transmission time based on the TA command so that the transmission can arrive to BS in an arrival time according to the BS 802 timeline.
[0075] [0075] In addition, BS can program the UE by providing a gap period for the UE to switch between transmitting and receiving. For example, BS can program the UE to transmit a UL 820 signal at some point after a time of receiving the DL 810 signal instead of immediately after receiving a DL 810 signal. As shown, there is a gap period 834 between receiving a DL 810 signal and transmitting a UL 820 signal. Although method 800 is described in the context of a BS communicating with a UE over a wireless access link, method 800 it can be applied to a BS that communicates with another BS through a wireless backhaul link, as described in more detail in this document.
[0076] [0076] Figure 9 is a timing diagram that illustrates a 900 programming method for an IAB network according to the modalities of the present disclosure. Figure 9 illustrates communications between multiple components as represented by the vertical lines. Method 900 can be employed by a BS (for example, BSs 105) to communicate with a UE (for example, UEs 115) over a wireless access link (for example, the wireless access link 125 ) or another BS via a wireless backhaul link (for example, wireless backhaul links 234) on an IAB network (for example, networks 200 and 300). Method 900 illustrates three nodes R1, R2 and R3 at three levels (for example, levels 402) for the sake of simplicity of discussion, but can be scaled to include any suitable number of nodes (for example, five, ten, twenty or more than twenty) configured at any suitable number of levels (for example, four, five or more than five).
[0077] [0077] Nodes R1, R2 and R3 can correspond to a portion of topology 400. For example, node R1l can be a hop h; (for example, levels 402) in relation to anchor 410, where hi is a positive integer. Method 900 can be used in combination with method 500. For example, node R1 and node R2 can correspond to BSs 105, and node R3 can correspond to a BS 105 or UE 115. The Tx timeline of DL, 902, the Rx timeline of DL, 904 and the Tx timeline of UL, 906 between node R1l and node R2 are similar to timeline 802, 804 and 806, respectively. In some scenarios, the R1 node can act as a parent node or an ACF node for the R2 node. The R1 node can transmit DL 910 signals according to a R1 node timing reference. DL 910 signals can receive at node R2 after a propagation delay. The R1 node can transmit a TA command to the R2 node. The R2 node can track the DL timing of the R1 node, receive the TA command, and transmit UL 920 signals based on the TA command.
[0078] [0078] In some scenarios, the nodes in Figure 9 can communicate with each other based on programming (for example, programming based on timing). For example, node R2 can communicate with node R3 (for example, a child node or a UEF node for node R2). Node R2 can select a DL transmission timing reference (for example, Tx DL;) to transmit DL 930 signals to node R3. Figure 9 illustrates three options 932, 934 and 936 for the Tx DL, 908 timeline.
[0079] [0079] In the first option 932, node R2 can use a single transmission timing reference when aligning the DL transmission timing of node R2 to the UL transmission timing of node R2.
[0080] [0080] In the second option 934, node R2 can use two transmission timing references, one for UL transmissions based on instructions from node R1 and another for DL transmissions. Node R2 can align the DL transmission delay of node R2 with a DL transmission delay of a parent node or an ACF node (for example, node R1) of node R2.
[0081] [0081] In the third option 936, node R2 may use two transmission timing references, one for UL transmissions based on instructions from node R1 and another for DL transmissions. Node R2 can align the DL transmit delay of node R2 with the DL receive delay (for example, a time for receiving DL 910 signals) from node R2.
[0082] [0082] Node R2 can select one of options 932, 934 and 936. However, the first option 932 and the third option 936 can lead to a large timing misalignment between nodes in the network depending on the number of hops (for example, levels 402) due to the cumulative effects of propagation delays (eg, The delay 830) from one jump to the next. The second option 934 can provide the last portion of timing misalignment since the entire DL transmission timing on the network can be aligned with the DL transmission timing of a top level node (for example, anchor 410) .
[0083] [0083] After selecting a timing reference for DL transmission, node R2 can schedule UL and / or DL communications with node R3. Node R2 can include a gap period in a schedule as needed for node R3 to switch between receiving and transmitting. The R2 node can further measure interference (for example, cross-link interference) in the network, monitor transmissions (for example, transmission error rates) on the network and schedule UL transmissions based on the measured interference (for example, for minimize cross-link interference) and monitored information (for example, to minimize transmission error rates).
[0084] [0084] Figure 10 is a timing diagram that illustrates a programming method 1000 for an IAB network according to the modalities of the present disclosure. Figure 10 illustrates communications between multiple components as represented by the vertical lines. Method 1000 can be employed by BSs (for example, BSs 105) to communicate with each other over wireless backhaul links (for example, wireless backhaul links 234) over an IAB network (for example, networks 200 and 300). Method 1000 illustrates a R2 node that has two parent nodes R1 and R2 (for example, in a mesh topology) for the sake of simplicity of discussion, but can be scaled to include any suitable number of parent nodes (for example, three, four, five or six). Nodes R1l, R2, and R3 can correspond to BSs 105. Nodes R1, R2 and R3 can correspond to a portion of topology 400. For example, node Rl can be in a h jump, relative to anchor 410 and the node R2 may be in a jump h; in relation to anchor 410, where h ;, and h ;, are positive integers. Method 1000 can be used in combination with the method
[0085] [0085] In method 1000, the R1 node can transmit signals from DL 1010 according to the timing reference of node R1 as shown by the DL Tx timeline; 1001. DL 1010 signals can receive at node R3 after a propagation delay as shown by the DL Rx timeline, 1003. Node R2 can transmit DL 1020 signals according to node timing reference R2 as shown by the DL Tx timeline, 1002. DL 1020 signals can receive at node R3 after a propagation delay as shown by the DL Rx timeline; 1005.
[0086] [0086] The R3 node can transmit UL 1030 signals based on a timing reference instructed by the R1 node (for example, via a TA command) as shown by the UL Tx timeline, 1004. Similarly, node R3 can transmit UL 1040 signals based on a timing reference instructed by node R2 (for example, via a TA command) as shown by the UL Tx timeline, 1006.
[0087] [0087] When node R3 employs the second option 934 described in method 900 in relation to Figure 9, node R3 can align the DL transmission delay of node R3 with an average delay of parent nodes R1 and R2. When the second option 934 is used, the maximum gap period required may correspond to a maximum RTT in the network, for example, a maximum RTT 1050 from parent nodes R1 and R2 to node R3 as shown. After aligning or selecting a timing reference, node R3 can determine gap periods to schedule communications with child nodes or UEF nodes of node R3 as a function of timing reference, as described in more detail in this document.
[0088] [0088] As shown in methods 800, 900 and 1000, the present disclosure provides techniques for timing alignment across multiple hop IAB networks. In one example, the DL transmission timing is aligned through IAB nodes (for example, BSs 105 and relay nodes 1310) and IAB donors (for example, anchor 410, BSs 105 and nodes of retransmission 1310)) as shown by option 934. In one example, DL and UL transmission timing is aligned on an IAB node as shown by option 932.
[0089] [0089] Figure 11 is a signaling diagram that illustrates a method of communicating TAB 1100 according to the modalities of the present disclosure. The 1100 method is deployed between R1, R2 and R3 relay nodes. Node R1l can correspond to a BS (for example, BSs 105 and 700 and anchor 410) and can function as an ACF node for nodes R2 and R3. Nodes R2 and R3 can correspond to BSs and / or UEs (for example, UEs 115 and 600) and can function as UEF nodes for node Rl. The steps of method 1100 can be performed by computing devices (for example, a processor, processing circuit and / or other suitable component) of the relay nodes. As illustrated, method 1100 includes a number of steps listed, but the modalities of method 1100 may include additional steps before, after and between the steps listed. In some embodiments, one or more of the steps listed may be omitted or performed in a different order. The use of the "step" tag is to describe an action or activity as opposed to defining a prescribed or necessary order of events.
[0090] [0090] In step 1110, node Rl determines a first gap period (for example, period 834) to communicate with node R2. For example, node Rl can receive a report from node R2. Reports can include capacity information, a transmit-receive switching requirement, a synchronization reference switching requirement, or R2 node scheduling information. Capacity information can include an EU category or a power class for node R2 and / or frequency bands, radio access techniques (RATs), measurement and reporting supported by node R2 and / or features supported by node R2. The transmit-receive switching requirement refers to the amount of time required for node R2 to switch from a transmit mode to a receive mode or a receive mode to a transmission mode. The synchronization reference switching requirement refers to the amount of time for node R2 to switch between two or more synchronization references. The R1 node can determine the first gap period based on the report.
[0091] [0091] In step 1120, node Rl determines a second gap period (for example, period 834) to communicate with node R3, for example, based on a transmit-receive switch from node R3.
[0092] [0092] In step 1130, node R1l communicates with node R2 based on the first gap period. For example, node R1l can determine a DL transmission time to transmit to node R2 and / or a UL transmission time to node R2 based on the first gap period.
[0093] [0093] In step 1140, node R1 communicates with node R3 based on the second gap period. For example, node R1l can determine a DL transmission time to transmit to node R3 and / or a UL transmission time to node R3 based on the second gap period.
[0094] [0094] In some modalities, the first gap period and the second gap period can be indicated in the downlink control (DCI) information together with the programming information. For example, in the context of LTE or NR, node R1 can transmit a physical downlink control channel (PDCCH) signal that indicates a schedule for communicating a signal with node R2. The PDCCH signal can include a DCI that indicates a gap period. Alternatively, gap periods can be indicated in another DCI, media access control element (CEs), MIBs, SIBs and / or an RRC message.
[0095] [0095] As can be seen, in method 1100, an ACF node or a parent node (for example, the R1 node) can determine a UEF specific gap period to communicate with a UEF node or a child node ( for example, nodes R2 and R3).
[0096] [0096] Figure 12 is a signaling diagram that illustrates a method of communicating TIAB 1200 according to the modalities of the present disclosure. Method 1200 is implanted between relay nodes R1, R2 and R3. Node R1l can correspond to a BS (for example, BSs 105 and 700 and anchor 410) and can function as an ACF node for nodes R2 and R3. Nodes R2 and R3 can correspond to BSs and / or UEs (for example, UEs 115 and 600) and can function as UEF nodes for node Rl. The 1200 method steps can be performed by computing devices (for example, a processor, processing circuit and / or other suitable component) of the relay nodes. As illustrated, method 1200 includes a number of steps listed, but the modalities of method 1200 may include additional steps before, after and between the steps listed. In some embodiments, one or more of the steps listed may be omitted or performed in a different order.
[0097] [0097] method 1200 can improve resource utilization efficiency compared to method 1100. For example, gap periods can be wasteful in terms of resource utilization since gap periods are idle periods without transmission . When a parent node (for example, the R1 node) determines that all of its child nodes (for example, nodes R2 and R3) require a certain gap period, the parent node can adjust (for example, forward or delay) a parent node timing reference. In other words, the parent node can adjust a frame boundary or partition boundary to communicate with the child nodes.
[0098] [0098] Alternatively, when the parent node determines that multiple gap periods in a partition to communicate with the child nodes, the parent node can switch from a normal cyclic prefix (CP) mode to an extended CP (ECP) mode . CP refers to the prefixing of a symbol with a repetition of one end of the symbol. CP is used in OFDM symbols to mitigate inter-symbol interference (ISI). An ECP refers to a CP with an extended duration of time compared to a normal CP.
[0099] [0099] In step 1210, node Rl sets the timing reference of node Rl. For example, node R1 can determine the fit so that the fit may not cause interference to other relay nodes on the network or create scheduling conflicts with other relay nodes. The adjustment can be a delay and advance of the timing reference or an inclusion of an ECP.
[0100] [0100] In step 1220, node R1l communicates with node R2 based on the adjusted timing reference.
[0101] [0101] In step 1230, node R1 communicates with node R3 based on the adjusted timing reference.
[0102] [0102] Consequently, the present disclosure provides techniques for alignment between IAB nodes and / or IAB donors or an IAB node based on a partition-level alignment or a symbol-level alignment.
[0103] [0103] Figures 13 to 16 illustrate various mechanisms for maintaining and / or refining synchronization on an IAB network (for example, networks 200 and 300), for example, based on an anchor timing reference (for example, example, anchor 410), a relay node (for example, BSs 105 and UEs 115) with a GPS connection to a selected relay node and / or a central entity.
[0104] [0104] Figure 13 illustrates a method of distributed synchronization 1300 according to the modalities of the present disclosure. Method 1300 can be employed by BSs (for example, BSs 105) and UEs (for example, UEs 115) in an IAB network (for example, network 100). Method 1300 illustrates four retransmission nodes 1310 with a retransmission node that includes a GPS 1320 for simplicity of discussion, but can be scaled to include any suitable number of retransmission nodes (for example, five, six, ten or more ten) and / or GPS connections (for example, three, four, five or six).
[0105] [0105] In method 1300, node R1l 1310 can correspond to a BS and nodes R2, R3 and R4 1310 can be a BS or a UE. In one embodiment, node R1 1310 can be an anchor (for example, anchor 410) in the network. Each of the 1310 nodes can maintain one or more synchronization references and can communicate synchronization information (for example, timing information and / or frequency information) with each other. Each 1310 node can adjust the synchronization references for node 1310 based on the synchronization information received from other nodes.
[0106] [0106] The 1310 nodes can exchange synchronization information related to internal timing references with each other. In addition, node R2 1310 can transmit synchronization information based on a timing provided by GPS 1320 to node R1 1310. Nodes 1310 can receive synchronization information from one or more sources (for example, other nodes 1310 and / or GPS 1320) and can set an internal timing reference based on the received synchronization information.
[0107] [0107] Figure 14 illustrates a centralized synchronization method 1400 according to the modalities of the present disclosure. Method 1400 can be employed by BSs (for example, BSs 105) and UEs (for example, UEs 115) in an IAB network (for example, network 100). Method 1400 is substantially similar to method 1300, but employs a central entity 1410 to determine settings for synchronization references of nodes 1310. Central entity 1410 can be a logical entity and can be physically mapped to any node in a network, for example , an anchor node, a 1310 relay node or a dedicated node.
[0108] [0108] In method 1400, central entity 1410 can collect synchronization information from nodes 1310. Central entity 1410 can determine synchronization settings for nodes 1310 based on the collected synchronization information. The central entity 1410 can transmit the synchronization settings determined to the corresponding nodes 1310.
[0109] [0109] Figure 15 is a signaling diagram illustrating a distributed synchronization method 1500 according to the modalities of the present disclosure. Method 1500 is deployed between a relay node R1 (for example, BSs 105 and UEs 115 and nodes 1310) and other relay nodes (for example, BSs 105 and UEs 115 and nodes 1310) in a IAB network (for example, network 100). The R1 node can be coupled to a GPS (for example, the GPS 1320). The other relay nodes can include a combination of R1 node UEF nodes and R1 node ACF nodes. Method 1500 can employ similar mechanisms as described in Method 1300 with respect to Figure 13. The steps in Method 1500 can be performed by computing devices (for example, a processor, processing circuit and / or other suitable component) of the retransmission. As illustrated, method 1500 includes a number of steps listed, but the modalities of method 1500 may include additional steps before, after and between the steps listed. In some embodiments, one or more of the steps listed may be omitted or performed in a different order.
[0110] [0110] In step 1510, the GPS transmits timing information to the R1 node.
[0111] [0111] In step 1520, one or more other relay nodes can transmit messages to the R1 node. Each message can include synchronization information associated with a synchronization reference (for example, a GPS 1320 or an internal synchronization reference) from a corresponding relay node. The synchronization information can include timing information or frequency information. The message may indicate a timing adjustment amount and / or a frequency adjustment amount for node R1. In some modalities,
[0112] [0112] In step 1530, one or more other relay nodes can transmit synchronization reference signals, for example, based on the synchronization references in the corresponding relay nodes. The synchronization reference signals can be layer 1 (LI) signals (e.g., physical layer) that include a predetermined signal sequence. In some embodiments, the sync reference signals can be loaded into NS sync signal blocks (SS).
[0113] [0113] In one mode, the synchronization reference signals and / or messages can be transmitted based on semi-static programming. In one embodiment, the synchronization reference signals and / or messages can be transmitted in response to a request from node R1l.
[0114] [0114] In step 1540, the Rl node can adjust synchronization references from the Rl node based on the timing information received from the GPS, the synchronization information in the received messages and / or measurements (for example, timing and / or frequency measurements ) of the received synchronization reference signals.
[0115] [0115] In one embodiment, node R1 can adjust the synchronization references of node Rl by detecting a difference between the synchronization references of node Rl and the received synchronization reference signals that exceed a limit.
[0116] [0116] In some modalities, there may be a priority level associated with each source of synchronization information. Priority level information can be included in each corresponding synchronization message that indicates a source of the synchronization information, for example, if the synchronization information is based on a GPS or an internal synchronization reference. Additionally or alternatively, information about the priority level can be indicated through other messages, by other nodes in the system or acquired from the upper layer. In some embodiments, each message may include a priority level that indicates a hop count or level (for example, level 402) at which a corresponding node is located. Then, a node (for example, node R1) that receives the synchronization information can adjust the internal synchronization reference of the node as a function of the priority levels. For example, the node can adjust an internal synchronization reference based on an average determined from the highest priority synchronization information.
[0117] [0117] Figure 16 is a signaling diagram that illustrates a centralized synchronization method 1600 according to the modalities of the present disclosure. Method 1600 is deployed between a central entity (for example, central entity 1410) and relay nodes (for example, BSs 105 and UEs 115) on an IAB network (for example, network 100). Method 1600 can employ similar mechanisms as described in Method 1400 with respect to Figure 14. The steps of Method 1600 can be performed by computing devices (for example, a processor, processing circuit and / or other suitable component) of the retransmission. As illustrated, method 1600 includes a number of steps listed, but the modalities of method 1600 may include additional steps before, after and between the steps listed. In some embodiments, one or more of the steps listed may be omitted or performed in a different order.
[0118] [0118] In step 1610, the relay nodes can transmit synchronization information to the central entity. The synchronization information can correspond to the timing and / or frequency information of a synchronization reference (for example, a GPS 1320 or an internal synchronization reference) of a corresponding relay node.
[0119] [0119] In step 1620, the central entity can determine adjustments for synchronization references of the relay nodes based on the received synchronization information.
[0120] [0120] In step 1630, the central entity can transmit the synchronization settings determined to the corresponding retransmission nodes. For example, the central entity can instruct a first relay node to communicate with a second relay node that uses a specific setting. In some embodiments, adjustments may include gap periods, transmit timing adjustments, receive timing adjustments, timing timing adjustments and / or timing frequency adjustment. In some embodiments, the central entity may additionally receive reports from the relay nodes. Reports can include capacity information, scheduling information, transmit-receive switching requirements, synchronization reference switching requirements associated with relay nodes. The central entity can determine the gap period configurations and / or cyclic prefix (for example, normal CP or ECP) based on the reports. In some modalities, synchronization information and adjustments can be loaded into NR or LTE RRC messages.
[0121] [0121] Figure 17 illustrates a 1700 wireless backhaul network according to the modalities of the present disclosure. Network 1700 may be similar to networks 200 and 300. Network 1700 includes a plurality of relay nodes 1310 shown as R1 through R11. Some of the 1310 nodes (for example, R5 and R8) may include connections to 1320 GPSs. The 1700 network can employ the topology 400 to establish multi-hop relay links
[0122] [0122] Figure 18 illustrates an overlapping 1800 traffic routing over the 1700 wireless backhaul network according to the modalities of the present disclosure. The traffic routing overlay 1800 includes traffic routes 1802 established between nodes 1310 to route traffic on network 1700. Traffic routes 1802 may or may not be overlapped over all links 1702. For example, while node R7 1310 and node R8 1310 can be connected by a link 1702, the traffic routing overlay 1800 does not include a traffic route 1802 between node R7 1310 and node R8 1310. The traffic routing overlay 1800 can partition and allocate resources for traffic routes 1802 (for example, overlapping over links 1702) to transport traffic between nodes 1310, for example, using method 500. The traffic routing overlay 1800 can include various network control operations and / or management for link activation and maintenance operations.
[0123] [0123] Figure 19 illustrates a 1900 synchronization overlay over the 1700 wireless backhaul network according to the modalities of the present disclosure. The 1900 sync overlay is based on the 1800 traffic routing overlay. The 1900 sync overlay reuses the 1802 traffic routes established by the 1800 traffic routing overlay and resources allocated by the 1800 traffic routing overlay to carry synchronization information and / or adjustment instructions between nodes 1310. The 1900 synchronization overlay can support the on-demand exchange of synchronization information and / or adjustments. The 1900 synchronization overlay can also leverage network control (for example, link maintenance and activation protocols) supported by the 1800 traffic routing overlay.
[0124] [0124] Figure 20 illustrates a synchronization overlay 2000 over the wireless backhaul network 1700 according to the modalities of the present disclosure. Instead of reusing the traffic routing overlay 1800 as in the 1900 overlay, the overlay 2000 can establish routes 2002 through links 1702. The routes 2002 can be different from the traffic routes 1802. For example, overlay 2000 can establish routes 2002 based on the synchronization sources (for example, GPS 1320) available on the 1700 network. So, overlay 2000 may provide better use of synchronization sources, but may be necessary to allocate resources, determine schedules and / or other separate from overlay 1800.
[0125] [0125] When a network (for example, networks 200 and 300) employs overlay 1900 (for example, which reuses traffic overlay 1800), UEF nodes in the network can provide synchronization feedback to the corresponding ACF nodes, for example, through MAC CEs. ACF nodes in the network can receive feedback from the corresponding UEF nodes and adjustment synchronization references based on the feedback.
[0126] [0126] When a network employs 1900 or 2000 overlays, the relay nodes in the network can send physical reference signals (for example, in sync signal blocks (SSBs)). Other relay nodes in the network can receive the physical reference signals and can set corresponding synchronization references based on measurements of the received physical reference signals, for example, for frequency tracking.
[0127] [0127] Figure 21 is a signaling diagram illustrating a 2100 synchronization method according to the modalities of the present disclosure. Method 2100 is deployed between a relay node R1 (for example, nodes 1310 and BSs 105 and 700) and other relay nodes (for example, nodes 1310, BSs 105 and 700 and UEs 115 and 600) on an IAB network (for example, network 100). The other relay nodes can be UEF nodes or child nodes of the R1 node. The R1 node and the other relay nodes can be part of the 1900 or 2000 overlap. The 2100 method steps can be performed by computing devices (for example, a processor, processing circuit and / or other suitable component) of the retransmission. As illustrated, method 2100 includes a number of steps listed, but the modalities of method 2100 may include additional steps before, after and between the steps listed. In some embodiments, one or more of the steps listed may be omitted or performed in a different order.
[0128] [0128] In step 2110, node Rl determines a first synchronization reference setting for one or more internal synchronization references of node Rl. The first adjustment can be relatively small, for example, a few samples or less than a symbol time period. The Rl node can adjust the internal synchronization references and continue to communicate with the other relay nodes.
[0129] [0129] In step 2120, node R1l communicates with the other relay nodes based on the set synchronization references.
[0130] [0130] In step 2130, the other retransmission nodes can track the adjustment based on communications with the Rl node. For example, a retransmission node can receive a communication signal or synchronization from node R1 and can detect the adjustment of the received communication signal. Then, the relay node can adjust an internal synchronization reference of the node based on the detected adjustment.
[0131] [0131] In step 2140, after a period of time, node R1 determines a second synchronization reference setting for the internal synchronization references. The second setting can be relatively large, for example, more than one symbol time period. The R1 node can determine that a resynchronization is required from the other relay nodes.
[0132] [0132] In step 2150, the R1 node transmits a resynchronization request to the other relay nodes. The R1 node can transmit the resynchronization request in a broadcast mode. The R1 node can additionally indicate resource and / or configuration information (for example, a set of synchronization reference signals or synchronization pulses) that the other relay nodes can use for resynchronization. In some embodiments, the R1 node may additionally indicate a resynchronization configuration, for example, including an adjustment amount and / or when the adjustment becomes effective (for example, an offset time period or a number of partitions in relation to transmission time of the request).
[0133] [0133] In step 2160, upon receipt of the resynchronization request, the other retransmission nodes can perform resynchronization based on the request. For example, a relay node can receive synchronization reference signals based on the resources and / or configuration indicated in the request and can adjust the corresponding internal synchronization references in a starting time that corresponds to the travel time period or number of partition indicated in the request. Although method 2100 is described in the context of synchronization and time adjustment, method 2100 can be applied to perform synchronization and frequency adjustment.
[0134] [0134] Figure 22 is a flow diagram of a 2200 method for communicating over an IAB network in accordance with the modalities of the present disclosure. The network can be similar to networks 200, 300 and 1700 and can be configured with topology 400 and / or overlays 1800, 1900 and
[0135] [0135] In step 2210, method 2200 includes receiving, via a wireless communication device, synchronization information from one or more wireless relay devices. the first wireless communication device and the one or more wireless relay devices can correspond to the 1310 relay nodes.
[0136] [0136] In step 2220, method 2200 includes adjusting, via the first wireless communication device, one or more synchronization references based on at least some of the synchronization information.
[0137] [0137] In step 2230, method 2200 includes communicating, via the first wireless communication device with one or more wireless relay devices, communication signals based on one or more set synchronization references. Communication signals can include a combination of backhaul traffic and access traffic.
[0138] [0138] In one embodiment, the first wireless communication device can be a BS and the one or more wireless relay devices can include parent nodes (for example, ACF nodes) and / or child nodes (for example, nodes UEF) of the first wireless communication device. For example, the one or more wireless relay devices may include a combination of UEs (for example, child nodes) and other BSs (for example, child nodes and / or parent nodes). UEs can be served by BS through wireless access links (for example, wireless access links 125). BS can relay backhaul traffic to other BSs over wireless backhaul links (for example, wireless backhaul links 234).
[0139] [0139] In one embodiment, the first wireless communication device can receive synchronization information upon receiving, from a first wireless relay device of one or more wireless relay devices, a message that includes at least one of the information timing information associated with a synchronization reference of the first wireless relay device, frequency information associated with the synchronization reference of the first wireless relay device, capacity information of the first wireless relay device, programming information of the first wireless device wireless retransmission, a transmit-receive switching requirement of the first wireless relay device, or a synchronization reference switching requirement of the first wireless relay device.
[0140] [0140] In one embodiment, the first wireless communication device can receive synchronization information upon receiving, from a first wireless relay device of one or more wireless relay devices, a synchronization reference signal that is based on in a synchronization reference of the first wireless relay device. The first wireless communication device can determine frequency shift and / or timing shift based on measurements of the received synchronization reference signals.
[0141] [0141] In one mode, synchronization information can include priority level information. Priority level information can include the source of the synchronization information, for example, if the synchronization information is obtained from a GPS or an internal synchronization reference from a corresponding relay node. Priority level information can also include a hop count that indicates the number of hops (for example, levels 402) in relation to the original sources of corresponding synchronization references. Then, the first wireless communication device can adjust to one or more synchronization references as a function of priority levels.
[0142] [0142] In one embodiment, the first wireless communication device can receive synchronization information from a central entity (for example, central entity 1410). In one embodiment, the first wireless communication device can additionally receive at least one of the timing information or frequency information from an external synchronization source and can adjust to one or more synchronization references additionally based on at least one of the information timing or frequency information. The external synchronization source can be a GPS (for example, the GPS 1320) or a synchronization source provided by another radio access technology (RAT). In some embodiments, the first wireless communication device may request synchronization information. In some other modalities, the first wireless communication device can receive synchronization information based on semi-static programming. In one embodiment, the first device can transmit synchronization information associated with one or more synchronization references based on at least one of a timeline, a request for synchronization information, a measurement of one or more synchronization references, or the setting one or more synchronization references.
[0143] [0143] In one embodiment, the first wireless communication device can relay backhaul traffic from one or more wireless relay devices to an anchoring wireless communication device (for example, anchor 410) communicating with a network main network (e.g., main network 130) via a fiber optic link (e.g., fiber optic link 134). The first wireless communication device can communicate with the one or more wireless relay devices based on a DL transmission timing of the docking wireless communication device, for example, using the second option 934 shown in method 900.
[0144] [0144] In one embodiment, the first wireless communication device can communicate with one or more wireless relay devices using the UEF-specific gap period (eg, The gap period 834) based on each capacity of the wireless relay device (for example, transmit-receive switching time). For example, The first wireless communication device can determine a first gap period based on a capacity parameter of a first wireless relay device on one or more wireless relay devices. The first wireless communication device can determine a second gap period based on a capacity parameter of a second wireless relay device from one or more wireless relay devices, in the second gap period other than the first gap period . The first wireless communication device can communicate with the first wireless relay device and the second wireless relay device based on the first gap period and the second gap period, respectively.
[0145] [0145] In one embodiment, the first wireless communication device can determine a gap period based on measurements and indication received from parent nodes (for example, ACF nodes) and / or child nodes (for example, UEF) of the first wireless communication device. In one embodiment, the first wireless communication device can determine a gap period based on the settings of the first wireless communication device or the schedules of other relay nodes. In one embodiment, the first wireless communication device can determine a gap period based on commands received from a central entity.
[0146] [0146] In some embodiments, a gap period can be located at any position on a partition, for example, at the beginning of a partition, at the end of a partition, or in the middle of the partition. The gap period can be network width, cell specific and / or UEF specific. In some embodiments, a gap period can change from partition to partition. In some embodiments, a gap period can be configured semi-statically with a semi-persistent pattern.
[0147] [0147] In one embodiment, the first wireless communication device can communicate simultaneously with a first wireless relay device and a second wireless relay device from one or more wireless relay devices. The first wireless communication can communicate with the first wireless relay device using a first synchronization reference and can communicate with the second wireless relay device using a second synchronization reference that is different from first synchronization reference.
[0148] [0148] In one embodiment, the first wireless communication device can switch from a normal CP to an ECP during communication based on the capacity parameters of the one or more wireless relay devices. When the first wireless communication device multiplexes communication with multiple relay devices, there may be a need to extend the duration of a CP (for example, to an ECP) to accommodate the different timings of the multiple relay devices in order to avoid ISI.
[0149] [0149] In one embodiment, the first wireless communication device can use different antenna arrays and different digital chains when communicating simultaneously with multiple wireless relay devices. In such an embodiment, the first wireless communication device may not be necessary to switch to an ECP mode. In another embodiment, the first wireless communication device can use different antenna arrays with a single digital chain or a single antenna subarray with multiple finger beam formation. In such an embodiment, the first wireless communication device may be required to switch to an ECP mode and multiplex communications, for example, using frequency division multiplexing (FDM).
[0150] [0150] In one embodiment, the first wireless communication device can communicate with a first wireless relay device from one or more wireless relay devices, a first communication signal from the communication signals during a first period of time based on a first synchronization reference from one or more synchronization references. The first wireless communication device can communicate with a second wireless relay device from one or more wireless relay devices, a second communication signal from the communication signals for a second period of time subsequent to the first period of time with based on a second synchronization reference from one or more synchronization references that is different from the first synchronization reference.
[0151] [0151] Although a schedule can accommodate timing misalignment between different nodes and / or avoid ISI by introducing gap periods or using an ECP mode, there is an exchange between the use of ECP and gap periods. The use of ECP increases the overhead on all symbols within a partition. However, when a schedule requires multiple periods of gap within a partition, the use of ECP may be appropriate. On the other hand, when a schedule does not require multiple switching between different synchronization references, the use of gap periods may be appropriate. For example, a relay node can switch multiple directions to a node based on a first synchronization reference and then switch multiple directions to another node based on a second synchronization reference. In such a scenario, the retransmission node may need a single gap period between the two scans, which may be more effective than using an ECP for all symbols.
[0152] [0152] In one embodiment, the first wireless communication device can determine whether to select a normal CP or an ECP based on the measurements and indication received from parent nodes (for example, ACF nodes) and / or child nodes (for example , the UEF nodes) of the first wireless communication device, schedules "of the first wireless communication device, schedules of other relay nodes and / or commands received from a central entity.
[0153] [0153] Figure 23 is a flow diagram of a 2300 method for managing synchronization references in an IAB network according to the modalities of the present disclosure. The network can be similar to the 200, 300 and 1700 networks and can be configured with the topology 400 and / or the overlays 1800, 1900 and 2000. Steps in the 2300 method can be performed using a computing device (for example, a processor , processing circuit, and / or other suitable component) of a wireless communication device, such as BSs 105 and 700 and central entity 1410. Method 2300 may employ similar mechanisms as in methods 500, 800, 900, 1000, 1100 , 1200, 1300, 1400, 1500, 1600 and 2100 described in relation to Figures 5, 8, 9, 10, 11, 12, 13, 14, 15, 16 and 21, respectively. As illustrated, method 2300 includes a number of steps listed, but the modalities of method 2300 may include additional steps before, after and between the steps listed. In some embodiments, one or more of the steps listed may be omitted or performed in a different order.
[0154] [0154] In step 2310, method 2300 includes receiving, through a central entity from one or more wireless relay devices (for example, BSs 105 and 700, UEs 115 and 600, and relay nodes 1310) , synchronization information associated with one or more wireless relay devices. The synchronization information may include frequency information and / or timing information associated with the synchronization references of the one or more wireless relay devices.
[0155] [0155] In step 2320, method 2300 includes determining, through the central entity, a synchronization reference setting based on at least some of the synchronization information. The adjustment may include a gap period, a cyclic prefix configuration, a timing synchronization setting, a frequency synchronization setting, a transmission timing setting and / or a receiving timing setting.
[0156] [0156] In step 2330, method 2300 includes transmitting, through the central entity, a message that instructs a first wireless relay device from one or more wireless relay devices to communicate with a second wireless relay device from one or more wireless relay devices based on the sync reference setting.
[0157] [0157] In one embodiment, the central entity can collect reports from one or more wireless relay devices. Reports can include at least one of the capacity information of one or more wireless relay devices, programming information of one or more wireless relay devices, switching between transmit-receive of one or more wireless relay devices , synchronization reference switching requirements for one or more wireless relay devices, or priority levels associated with synchronization source references for one or more wireless relay devices. The central entity can determine at least one of the gap period or the cyclic prefix setting for the first wireless relay device to communicate with the second wireless relay device based on the reports.
[0158] [0158] In one embodiment, fo) the first wireless communication device and the second wireless communication devices can both be BSs where the setting is for backhaul communication. For example, the first wireless communication device can be a parent node or an ACF node of the second wireless communication device. Alternatively, the first wireless communication device can be a child node or a UEF node of the second wireless communication device.
[0159] [0159] In one embodiment, the first wireless communication device can be a BS and the second wireless communication device can be a UE, where the setting is for access communication.
[0160] [0160] In another embodiment, the first wireless communication device can be a UE and the second wireless communication device can be a BS, where the setting is for access communication.
[0161] [0161] Information and signals can be represented using any of a variety of technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols and chips that can be referenced throughout the description above can be represented by voltages, currents, electromagnetic waves, magnetic fields or by particles, optical fields or particles, or any combination thereof.
[0162] [0162] The various blocks and illustrative modules described in conjunction with the present disclosure can be deployed or performed with a general purpose processor, DSP, ASIC, FPGA or other programmable logic device (PDL), discrete gate or logic transistors, discrete hardware components or any combination of them designed to perform the functions described in this document. A general purpose processor can be a microprocessor, but alternatively, the processor can be any conventional processor, controller, microcontroller or state machine. A processor can also be deployed as a combination of computing devices (for example, a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors together with a DSP core, or any other such configuration).
[0163] [0163] The functions described in this document can be implemented in hardware, software, performed by a processor, firmware or any combination thereof. If implemented in software executed by a processor, the functions can be stored or transmitted through one or more instructions or codes in a computer-readable medium. Other examples and other deployments are within the scope of the disclosure and attached claims. For example, due to the nature of the software, the functions described above can be implemented using software executed by a processor, hardware, firmware, physical connections, or combinations of any of these. Features that deploy functions can also be physically located in various positions, including being distributed so that portions of the functions are deployed in different physical locations. Also, as used in this document, including in the claims, “or” as used in an item list (for example, a list of items pre-punctuated by an expression such as “at least one of an inclusive list so that, for example, a list of [at least one of A, B, or C] means A or B or C or AB or AC or BC or ABC (ie, A and BeC).
[0164] [0164] The modalities of the present disclosure additionally include a computer-readable medium that has program code registered to it, the program code comprising code to cause a first wireless communication device to receive synchronization information associated with a or more wireless relay devices; code to have the first wireless communication device set one or more synchronization references based on at least some of the synchronization information; And code to cause the first wireless communication device to communicate, with one or more wireless relay devices, communication signals based on one or more set synchronization references, in which at least one of the communication signals includes backhaul traffic.
[0165] [0165] The computer-readable medium additionally includes, in which the code to make the first wireless relay device receive the synchronization information is additionally configured to receive, from a first wireless relay device from one or more wireless devices. wireless relay, a message that includes at least timing information associated with a synchronization reference from the first wireless relay device, frequency information associated with the synchronization reference from the first wireless relay device, capacity information from the first wireless relay device wireless relay, programming information from the first wireless relay device, a transmit-receive switching requirement from the first wireless relay device, or a synchronization reference switching requirement from the first wireless relay device. The computer-readable medium further includes, wherein the code to cause the first wireless communication device to receive the synchronization information is additionally configured to receive, from a first wireless relay device to one or more relay devices wireless, a sync reference signal that is based on a sync reference from the first wireless relay device. The computer-readable medium additionally includes, in which the code to make the first wireless communication device receive the synchronization information is additionally configured to receive priority levels associated with the sources of the synchronization information, and in which the setting includes adjust to one or more synchronization references based on priority levels.
[0166] [0166] The modalities of the present disclosure additionally include a computer-readable medium that has program code written on it, the program code comprising code to cause a central unit to receive, from one or more wireless relay devices , synchronization information associated with one or more wireless relay devices; code to cause the central unit to determine a synchronization reference setting based on at least some of the synchronization information; and code to cause the central unit to transmit a message to instruct a first wireless relay device from one or more wireless relay devices to communicate with a second wireless relay device from one or more wireless relay devices based on the sync reference setting.
[0167] [0167] The computer-readable medium additionally includes, in which the code to make the central unit receive the synchronization information is additionally configured to receive at least one of the frequency information associated with the synchronization references of the one or more synchronization devices. wireless relay or timing information associated with synchronization references from one or more wireless relay devices. The computer-readable medium additionally includes, in which the code for causing the central unit to transmit the message is additionally configured to transmit the synchronization reference setting that includes at least one of a gap period, a cyclic prefix configuration, a timing synchronization setting, a frequency synchronization setting, a transmission timing setting or a receiving timing setting. The computer-readable medium additionally includes code to cause the central unit to receive, from one or more wireless relay devices, reports that include at least one of the capacity information of the one or more wireless relay devices, programming information one or more wireless relay devices, transmit-receive switching requirements of one or more wireless relay devices, synchronization reference switching requirements of one or more wireless relay devices, or priority levels associated with synchronization source references for one or more wireless relay devices; and code to have the central unit determine at least one of the gap period or the cyclic prefix setting for the first wireless relay device to communicate with the second wireless relay device based on the reports.
[0168] [0168] The modalities of the present disclosure additionally include an apparatus comprising means
[0169] [0169] The apparatus additionally includes, in which means to receive the synchronization information are additionally configured to receive, from a first wireless relay device of the one or more wireless relay devices, a message that includes at least timing information associated with a synchronization reference of the first wireless relay device, frequency information associated with the synchronization reference of the first wireless relay device, capacity information of the first wireless relay device, programming information of the first wireless relay device wire, a transmit-receive switching requirement of the first wireless relay device, or a synchronization reference switching requirement of the first wireless relay device. The apparatus additionally includes, in which the means for receiving the synchronization information is additionally configured to receive, from a first wireless relay device of one or more wireless relay devices, a synchronization reference signal which is based on a synchronization reference of the first wireless relay device.
[0170] [0170] The modalities of the present disclosure additionally include an apparatus comprising means (for example, transceivers 610 and 710 and antennas 616 and 716) for receiving, from one or more wireless relay devices, synchronization information associated with one or more more wireless relay devices; means (for example, processors 602 and 702) for determining a synchronization reference setting based on at least some of the synchronization information; and means (for example, transceivers 610 and 710 and antennas 616 and 716) to transmit a message to instruct a first wireless relay device from one or more wireless relay devices to communicate with a second wireless relay device one or more wireless relay devices based on the synchronization reference setting.
[0171] [0171] The apparatus additionally includes, in which the means for receiving the synchronization information is additionally configured to receive at least one of the frequency information associated with the synchronization references of the one or more wireless relay devices or timing information associated with the synchronization references for one or more wireless relay devices. The apparatus additionally includes, in which the message includes the synchronization reference setting which includes at least one of a gap period, a cyclic prefix setting, a timing synchronization setting, a frequency synchronization setting, a frequency setting transmission delay or receive delay adjustment. The apparatus additionally includes means (for example, transceivers 610 and 710 and antennas 616 and 716) for receiving, from one or more wireless relay devices, reports that include at least one of the capacity information of the one or more relay devices wireless, scheduling information for one or more wireless relay devices, transmit-receive switching requirements for one or more wireless relay devices, synchronization reference switching requirements for one or more wireless relay devices, or priority levels associated with sync source references from one or more wireless relay devices; and means (for example, processors 602 and 702) to determine at least one of the gap period or cyclic prefix configuration for the first wireless relay device to communicate with the second wireless relay device based on reports .
[0172] [0172] As those with some skill in the technique will observe now and depending on the specific application anticipated, many modifications, substitutions and variations can be made to the materials, devices, configurations and methods of using the devices of the present disclosure without departing from the spirit and its scope. In light of this, the scope of the present disclosure should not be limited to that of the specific modalities illustrated and described in this document, as they are merely by means of some examples of them, but, instead, they must be fully suited to those of the claims hereafter and their functional equivalents.

权利要求:
Claims (68)
[1]
1. A wireless communication method comprising: receiving, via a wireless communication device, synchronization information associated with one or more wireless relay devices; adjust, via the first wireless communication device, one or more synchronization references from the first wireless communication device based on at least a subset of the received synchronization information; and communicating, via the first wireless communication device with one or more wireless relay devices, communication signals in synchronization with one or more adjusted synchronization references, wherein at least one of the communication signals includes backhaul data .
[2]
A method according to claim 1, wherein receiving includes: receiving, via the first wireless communication device from a first wireless relay device from one or more wireless relay devices, a message that includes at least at least one of the timing information associated with a synchronization reference of the first wireless relay device or frequency information associated with the synchronization reference of the first wireless relay device.
[3]
A method according to claim 1, wherein receiving includes: receiving, via the first wireless communication device from a first wireless relay device from one or more wireless relay devices, a reference signal from synchronization that is based on a synchronization reference from the first wireless relay device.
[4]
4, Method according to claim 1, wherein the receipt includes: receiving priority levels associated with sources of synchronization information, and where the adjustment includes: selecting the subset of the received synchronization information based on the priority levels .
[5]
5. Method according to claim 1, wherein receipt includes: receiving priority levels associated with hop counts from one or more wireless relay devices relative to an original synchronization reference source, and in which the adjustment includes: selecting the subset of the synchronization information received based on the priority levels.
[6]
6. Method according to claim 1, wherein the receipt includes: receiving, through the first wireless communication device of a central entity, the synchronization information.
[7]
Method according to claim 1, which further comprises: receiving, via the first wireless communication device from an external synchronization source, at least one of the timing information Or frequency information from the external synchronization source ; and adjusting one or more synchronization references in addition based on at least one of the timing information or frequency information from the external synchronization source.
[8]
A method according to claim 1, which further comprises: transmitting, via the first wireless communication device, a message requesting synchronization information.
[9]
9. Method according to claim 1, which further comprises: transmitting, via the first wireless communication device, synchronization information associated with one or more synchronization references based on at least one of a schedule, a request for synchronization information, a measurement of one or more synchronization references, or the adjustment of one or more synchronization references.
[10]
A method according to claim 1, which further comprises: communicating, via the first wireless communication device with a second wireless communication device, a second communication signal which includes access data.
[11]
11. Method according to claim 1, which further comprises: transmitting, via the first wireless communication device, a message requesting one or more wireless relay devices to resynchronize to one or more adjusted synchronization references .
[12]
12. The method of claim 1, wherein the communication includes: communicating, via the first wireless communication device with a first wireless relay device on one or more wireless relay devices, a first communication signal based on a first synchronization reference from one or more synchronization references; And communicate, through the first wireless communication device with a second wireless communication device, a second communication signal based on a second synchronization reference from one or more synchronization references that is different from the first synchronization reference.
[13]
13. The method of claim 12, wherein the communication includes communicating the first communication signal concurrently with the second communication signal.
[14]
A method according to claim 12, wherein the communication includes communicating the first communication signal and the second communication signal for different periods of time.
[15]
15. A wireless communication method comprising: receiving, through a central entity from one or more wireless relay devices, synchronization information associated with one or more wireless relay devices;
determining, through the central entity, a synchronization reference setting for a first wireless relay device of one or more wireless relay devices based on at least a subset of the received synchronization information; and transmitting, through the central entity, a message instructing the first wireless relay device of one or more wireless relay devices to synchronize communication with a second wireless relay device of the one or more wireless relay devices with based on the synchronization reference setting.
[16]
16. Method according to claim 15, wherein the receipt includes: receiving at least one of the frequency information or timing information associated with one or more synchronization references.
[17]
17. Method according to claim 15, in which the receipt includes: receiving priority levels associated with sources of synchronization information, and in which the determination includes: selecting the subset of the received synchronization information based on the priority levels .
[18]
18. The method of claim 15, wherein receiving includes: receiving priority levels associated with hop counts from one or more wireless relay devices relative to an original synchronization reference source, and in which the determination includes: selecting the subset of the synchronization information received based on the priority levels.
[19]
19. The method of claim 15, wherein the transmission includes: transmitting, through the central entity, at least one of a timing setting or a frequency setting for a synchronization reference of the first wireless relay device.
[20]
20. Apparatus comprising: a transceiver configured to receive synchronization information associated with one or more wireless relay devices; and a processor configured to set one or more device sync references based on at least a subset of the received sync information, where the transceiver is additionally configured to communicate, with one or more wireless relay devices, signals from synchronized communication with one or more adjusted synchronization references, where at least one of the communication signals includes backhaul data.
[21]
21. Apparatus according to claim 20, wherein the transceiver is additionally configured to receive synchronization information by: receiving, from a first wireless relay device one or more wireless relay devices, a message that includes at least one of the timing information associated with a synchronization reference of the first wireless relay device or frequency information associated with the synchronization reference of the first wireless relay device.
[22]
22. Apparatus according to claim 20, wherein the transceiver is additionally configured to receive synchronization information by: receiving, from a first wireless relay device one or more wireless relay devices, a reference signal synchronization that is based on a synchronization reference from the first wireless relay device.
[23]
23. Apparatus according to claim 20, in which the transceiver is additionally configured to receive synchronization information by: receiving priority levels associated with the sources of synchronization information, and in which the processor is additionally configured to adjust to a or more synchronization references by: selecting the subset of the synchronization information received based on the priority levels.
[24]
24. Apparatus according to claim 20, wherein the transceiver is additionally configured to receive synchronization information by: receiving priority levels associated with hop counts from one or more wireless relay devices in relation to a source of original synchronization reference, and in which the processor is additionally configured to adjust to one or more synchronization references by: selecting the subset of the synchronization information received based on the priority levels.
[25]
25. Apparatus according to claim 20, wherein the transceiver is further configured to receive synchronization information by: receiving synchronization information from a central entity.
[26]
26. Apparatus according to claim 20, wherein the transceiver is additionally configured to: receive, from an external synchronization source, at least one of the timing information Or frequency information from the external synchronization source, and in which the The processor is additionally configured to: adjust one or more synchronization references additionally based on at least one of the timing information or frequency information from the external synchronization source.
[27]
27. Apparatus according to claim 20, wherein the transceiver is additionally configured to: transmit a message requesting synchronization information.
[28]
28. Apparatus according to claim 20, wherein the transceiver is additionally configured to: transmit synchronization information associated with one or more synchronization references based on at least one of a schedule, a request for synchronization information, a measuring one or more synchronization references, or adjusting one or more synchronization references.
[29]
29. Apparatus according to claim 20, wherein the transceiver is further configured to: communicate with a wireless communication device, a second communication signal that includes access data.
[30]
30. Apparatus according to claim 20, wherein the transceiver is additionally configured to: transmit a message requesting one or more wireless relay devices to resynchronize to one or more adjusted synchronization references.
[31]
31. Apparatus according to claim 20, wherein the transceiver is further configured to communicate communication signals by: communicating with a first wireless relay device on one or more wireless relay devices, a first communication signal the communication signals based on a first synchronization reference from one or more synchronization references; and communicating, with a wireless communication device, a second communication signal of the communication signals based on a second synchronization reference from one or more synchronization references which is different from the first synchronization reference.
[32]
Apparatus according to claim 31, wherein the communication includes communicating the first communication signal concurrently with the second communication signal.
[33]
An apparatus according to claim 31, wherein the communication includes communicating the first communication signal and the second communication signal for different periods of time.
[34]
34. Apparatus comprising: a transceiver configured to receive, from one or more wireless relay devices, synchronization information associated with one or more wireless relay devices; and a processor configured to determine a sync reference setting for a first wireless relay device from one or more wireless relay devices based on at least a subset of the received synchronization information, where the transceiver is additionally configured to transmit a message that instructs the first wireless relay device of one or more wireless relay devices to synchronize communication with a second wireless relay device of one or more wireless relay devices based on the synchronization reference setting .
[35]
35. Apparatus according to claim 34, wherein the transceiver is further configured to receive synchronization by: receiving at least one of the frequency information or timing information associated with one or more synchronization references.
[36]
36. Apparatus according to claim 34,
where the transceiver is additionally configured to receive synchronization by: receiving priority levels associated with the sources of synchronization information, and where the processor is additionally configured to determine the synchronization reference setting by: selecting the subset of synchronization information received based on priority levels.
[37]
37. Apparatus according to claim 34, wherein the transceiver is further configured to receive synchronization by: receiving priority levels associated with hop counts from one or more wireless relay devices relative to a reference source of original synchronization, and where the processor is additionally configured to determine the synchronization reference setting by: selecting the subset of the synchronization information received based on the priority levels.
[38]
38. Apparatus according to claim 34, wherein the transceiver is further configured to transmit the message by: transmitting the message that includes at least one of a timing setting or a frequency setting for a synchronization reference of the first device wireless relay.
[39]
39. Wireless communication method comprising: determining, via a wireless communication device, one or more transmission frame configurations to communicate with a plurality of wireless communication devices on a multi-hop wireless network, wherein each of the one or more transmission frame configurations includes at least a first transmission gap period or a first type of cyclic prefix (CP); and communicating, via the first wireless communication device with the plurality of wireless communication devices, communication signals based on one or more transmission frame configurations, wherein at least one first communication signal of the communication signals includes backhaul data.
[40]
40. The method of claim 39, wherein the communication includes: communicating, via the first wireless communication device with a second wireless communication device from the plurality of wireless communication devices, a second communication signal from the communication signals, wherein the second communication signal includes access data.
[41]
41. The method of claim 39, wherein determining includes: determining, via the first wireless communication device, the first transmission gap period based on at least one of a second device's capacity parameter wireless communication device from the plurality of wireless communication devices, program information from the second wireless communication device, a transmit-receive switching requirement from the second wireless communication device, or a synchronization reference switching requirement from the second wireless communication device, and where communication includes: communicating, via the first wireless communication device with the second wireless communication device, the first communication signal based on the first transmission gap period.
[42]
42. The method of claim 41, which further comprises: transmitting, via the first wireless communication device to the second wireless communication device, a message that includes a transmission frame configuration indicating the first communication period. transmission gap.
[43]
43. The method of claim 41, wherein the determination includes: determining, via the first wireless communication device, a second transmission gap period based on at least one of a third device's capacity parameter wireless communication device from the plurality of wireless communication devices, program information from the third wireless communication device, a switching requirement between transmit-receive from the third wireless communication device, or a synchronization reference switching requirement from the third wireless communication device, the second period of transmission gap being different from the first period of transmission gap, and in which communication includes: communicating, through the first wireless communication device with the third wireless communication device , a second communication signal from the communication signals based on the second transmission gap period ssion.
[44]
44, Method according to claim 39, wherein the communication includes: communicating, via the first wireless communication device with a second wireless communication device from the plurality of wireless communication devices, the first communication signal with based on the first type of CP.
[45]
45. The method of claim 44, further comprising: switching, via the first wireless communication device, from the first type of CP to a second type of CP based on at least one of the capacity parameters of the plurality wireless communication devices, transmission-receiving switching requirements for the plurality of wireless communication devices, synchronization reference switching requirements for the plurality of wireless communication devices, or synchronization references for the plurality of wireless communication device wire, where the first type of CP and the second type of CP include different CP durations, where the communication of the communication signals includes: communicating, through the first wireless communication device with the second wireless communication device, a second communication signal from the communication signals based on the second type of CP.
[46]
46. The method of claim 45, which further comprises: transmitting, via the first wireless communication device to the second wireless communication device, a message indicating the second type of CP.
[47]
47. The method of claim 39, wherein the communication includes: communicating, via the first wireless communication device with a second wireless communication device, of the plurality of wireless communication devices in a next uplink hop. in relation to the first wireless communication device, a second communication signal from the communication signals during a first period of time; and communicating, through the first wireless communication device with a third wireless communication device of the plurality of wireless communication devices, in a next downlink hop in relation to the first wireless communication device, a third communication signal from the communication signals during a second time period different from the first time period.
[48]
48. Wireless communication method comprising: determining, through a central entity, one or more transmission frame configurations for a first wireless communication device from a plurality of wireless communication devices on a multiple wireless network hops, wherein the one or more transmission frame configurations includes at least one of a first transmission gap period or a first type of cyclic prefix (CP); and transmitting, through the central entity, a message instructing the first wireless communication device to communicate communication signals with one or more other wireless communication devices from the plurality of wireless communication devices based on one or more wireless configurations. transmission frame, in which at least one first communication signal of the communication signals includes backhaul data.
[49]
49. The method of claim 48, which further comprises: receiving, through the central entity of each of the plurality of wireless communication devices, one or more communication requirement parameters that include at least one among a parameter capacity, scheduling information, a transmit-receive switching requirement, or a synchronization reference switching requirement, where the determination is based on one or more communication requirement parameters.
[50]
50. The method of claim 48, wherein the transmission includes: transmitting, through the central entity to the first wireless communication device, a message indicating the first transmission gap period.
[51]
51. The method of claim 48, wherein the transmission includes:
transmit, through the central entity to the first wireless communication device, a message indicating the first type of CP.
[52]
52. The method of claim 51, further comprising: determining, through the central entity, switching from the first type of CP to a second type of CP based on at least one or more capacity requirement parameters received through of the central entity of the plurality of wireless communication devices, in which the first type of CP and the second type of CP include different CP durations, in which the transmission includes: transmitting, through the central entity to the first communication device without wire, a message instructing the first wireless communication device to switch from the first type of CP to the second type of CP.
[53]
53. The method of claim 51, which further comprises: determining, through the central entity, the switching from the first type of CP to a second type of CP based on one or more synchronization references received through the central entity of the plurality of wireless communication devices, in which the first type of CP and the second type of CP include different CP durations, in which the transmission includes: transmitting, through the central entity to the first wireless communication device, a message which instructs the first wireless communication device to switch from the first type of CP to the second type of CP.
[54]
54. Apparatus comprising: a processor configured to determine one or more transmission frame configurations to communicate with a plurality of wireless communication devices on a multi-hop wireless network, each of which provides one or more configurations of transmission frame includes at least a first transmission gap period or a first type of cyclic prefix (CP); and a transceiver configured to communicate, with the plurality of wireless communication devices, communication signals based on one or more transmission frame configurations, wherein at least one first communication signal of the communication signals includes backhaul data.
[55]
55. Apparatus according to claim 54, wherein the transceiver is further configured to communicate communication signals by: communicating, with a first wireless communication device from the plurality of wireless communication devices, a second communication signal communication signals, wherein the second communication signal includes access data.
[56]
56. An apparatus according to claim 54, wherein the processor is further configured to determine one or more transmission frame configurations by: determining the first transmission gap period based on at least one of a capacity parameter of a first wireless communication device from the plurality of wireless communication devices, program information from the first wireless communication device, a transmit-receive switching requirement of the first wireless communication device, or a reference switching requirement synchronization of the first wireless communication device, and in which the transceiver is additionally configured to communicate communication signals by: communicating, with the first wireless communication device, the first communication signal based on the first data gap period. streaming.
[57]
57. Apparatus according to claim 56, wherein the transceiver is further configured to: transmit, to the first wireless communication device, a message that includes a transmission frame configuration that indicates the first transmission gap period .
[58]
58. Apparatus according to claim 56, wherein the processor is further configured to determine one or more transmission frame configurations by: determining, a second transmission gap period based on at least one of a transmission parameter. the ability of a second wireless communication device from the plurality of wireless communication devices, to program information from the second wireless communication device, a transmit-receive switching requirement of the second wireless communication device,
or a synchronization reference switching requirement of the second wireless communication device, the second transmission gap period being different from the first transmission gap period, and in which the transceiver is additionally configured to communicate communication signals when: communicating, with the second wireless communication device, a second communication signal of the communication signals based on the second transmission gap period.
[59]
59. Apparatus according to claim 54, wherein the transceiver is further configured to communicate communication signals by: communicating, with a third wireless communication device from the plurality of wireless communication devices, the first communication signal based on the first type of CP.
[60]
60. Apparatus according to claim 59, wherein the processor is additionally configured to: switch from the first type of CP to a second type of CP based on at least one of the capacity parameters of the plurality of communication devices wireless, transmit-receive switching requirements for the plurality of wireless communication devices, synchronization reference switching requirements for the plurality of wireless communication devices, or synchronization references for the plurality of wireless communication device, where the first type of CP and the second type of CP include different duration of
CP, and in which the transceiver is additionally configured to communicate the communication signals by: communicating, with the first wireless communication device, a second communication signal of the communication signals based on the second type of CP.
[61]
61. Apparatus according to claim 60, wherein the transceiver is additionally configured to communicate communication signals by: transmitting a message indicating the second type of CP to the first wireless communication device.
[62]
62. Apparatus according to claim 54, wherein the transceiver is further configured to communicate communication signals by: communicating, with a first wireless communication device from the plurality of wireless communication devices in a next link hop upward relative to the apparatus, a second communication signal from the communication signals during a first period of time; and communicating, with a second wireless communication device, the plurality of wireless communication devices in a next downlink hop with respect to the first wireless communication device, a third communication signal of the communication signals during a second communication period. time different from the first time period.
[63]
63. Apparatus comprising: processor configured to determine one or more transmission frame configurations for a first wireless communication device from a plurality of wireless communication devices on a multi-hop wireless network, wherein one or more transmission frame configurations include at least one of a first transmission gap period or a first type of cyclic prefix (CP); and a transceiver configured to transmit a message that instructs the first wireless communication device to communicate communication signals with one or more other wireless communication devices from the plurality of wireless communication devices based on one or more frame configurations. transmission, in which at least a first communication signal of the communication signals includes backhaul data.
[64]
64. Apparatus according to claim 63, wherein the transceiver is additionally configured to: receive, from each of the plurality of wireless communication devices, one or more communication requirement parameters that include at least one among one capacity parameter, scheduling information, a transmit-to-receive switching requirement, or a synchronization reference switching requirement, and where the one or more transmission frame configurations are determined based on one or more of the transmission requirement parameters Communication.
[65]
65. Apparatus according to claim 63, wherein the message indicates the first transmission gap period.
[66]
66. Apparatus according to claim 63, wherein the message indicates the first type of CP.
[67]
67. Apparatus according to claim 66, wherein the processor is further configured to: determine, the switching from the first type of CP to a second type of CP based on at least one or more capacity requirement parameters received through the device of the plurality of wireless communication devices, where the first type of CP and the second type of CP include different CP durations, and where the message includes an instruction that instructs the first wireless communication device to switch from the first type of CP to the second type of CP.
[68]
68. Apparatus according to claim 66, wherein the processor is further configured to: determine, the switching from the first type of CP to a second type of CP based on one or more synchronization references received through the plurality apparatus of wireless communication devices, where the first type of CP and the second type of CP include different CP durations, and where the message includes an instruction that instructs the first wireless communication device to switch from the first type of CP for the second type of CP.

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