downlink position reference signal in multi-beam systems

专利摘要:
Methods, systems and devices for wireless communication are described. A base station and user equipment (UE) can use almost co-located antenna ports for transmitting and receiving synchronization and / or reference signals and positioning reference signals. For example, the base station can identify an almost co-location relationship that indicates that base station's antenna ports used to transmit a sync signal are almost co-located with base station's antenna ports used to transmit a reference signal positioning. In some cases, the base station may transmit an indication of the near co-location relationship to the UE. In addition, the UE can receive the synchronization signal and determine a reception beam for the UE to use to receive the positioning reference signal based, at least in part, on the received synchronization signal and the near co-relation. - identified location. The UE can then receive a positioning reference signal using the determined receiving beam.
公开号:BR112020001807A2
申请号:R112020001807-4
申请日:2018-07-18
公开日:2020-07-21
发明作者:Hung Dinh Ly
申请人:Qualcomm Incorporated；
IPC主号:

专利说明:

[0002] [0002] The following refers in general to wireless communication and, more specifically, to the downlink positioning reference signal in multi-beam systems. Wireless communication systems are widely implemented to provide different types of communication content, such as voice, video, packet data, messages, broadcast and so on. These systems may be able to support communication with multiple users by sharing available system resources (such as time, frequency and power). Examples of such multiple access systems include fourth generation (4G) systems, such as Long Term Evolution (LTE) or Advanced LTE (LTE-A) systems and fifth generation (5G) systems, which can be called New Radio Systems (NR). These systems can use technologies such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA) or OFDM with discrete scattered Fourrier transform (DFT-s-OFDM). A wireless multiple access communication system can include a number of base stations or network access nodes, each simultaneously supporting communication to multiple communication devices, which may otherwise be known as user equipment (UE).
[0003] [0003] In some wireless systems, devices (such as base stations and UEs) can communicate using directional transmissions (such as beams), in which beam formation can be applied using multiple antenna elements to provide a beam in a specific direction. In some cases, wireless systems can support both single-beam and multi-beam system operations. Single beam operations can be enabled for lower frequency bands (such as below 3 GHz) while multi-beam operations can be enabled for higher frequency bands (such as 3-6 GHz or mmW ).
[0004] [0004] In some cases, support positioning may be desired or required for services, such as emergency services (such as, for example, E911). Downlink-based positioning, also known as UE-based positioning, can include a base station that sends a positioning reference signal (PRS) on the downlink to support positioning procedures. The PRS can be a new radio PRS (NRPRS). Uplink-based positioning, also known as network-based positioning, can include a UE that sends an existing PRS or reference signal, such as an audible reference signal (SRS) to the uplink signal to support positioning procedures.
[0005] [0005] However, in some examples of wireless communication systems, for example, systems using directional transmissions, EU positioning techniques and techniques compatible with directional transmissions may not be supported. As a result, the UE may resort to using alternative or legacy systems capable of supporting UE positioning to provide services that require UE positioning support. The techniques used in these systems may perform poorly in systems that use directional transmissions and it may be desirable to develop new techniques for use in systems that use directional systems, so that positioning support is enabled when new wireless communication systems are introduced. For example, when a base station does not know the direction in which it transmits a PRS to a UE, the base station can transmit to the UE by scanning through a set of transmission beams focused in different directions, which transmit data and / or signals reference points (such as a PRS) on each of the transmission beams. In addition or alternatively, the UE can scan through a set of reception beams in an attempt to locate and identify an ideal reception beam in which the UE can receive the signals that the base station is transmitting. Scanning across different sets of beams can be costly in terms of time, energy and resource consumption, and measurement latency in the UE can be high. SUMMARY
[0006] [0006] The techniques described refer to improved methods, systems, devices or devices that support the downlink positioning reference signal in multi-beam systems and near co-location of antenna ports used to transmit paging messages and signals synchronization. In general, the techniques described are provided for making the antenna ports used to transmit reference signals (such as synchronization signals, channel state information reference signals (CSI-RS) for beam tracking or management) , physical broadcast channel signals (PBCH), demodulation reference signals (DRMS)), almost co-located (QCL) with the antenna ports used to transmit positioning reference signals (PRS). A user device (UE) can receive an indication of the QCL antenna configuration. A base station can perform a beam-scanning procedure and transmit a reference signal. The UE can receive the reference signal and can use the synchronization signal to determine a preferred receiving beam. The UE can use the preferred beam to receive the PRS without scanning additional receiving beams, resulting in reduced processing overhead and measurement latency.
[0007] [0007] A method of wireless communication in an UE is described. The method may include identifying an almost co-location relationship that indicates that one or more base station antenna ports used to transmit a reference signal are almost co-located with one or more base station antenna ports used to transmit a positioning reference signal, receiving the reference signal at the UE, determining a reception beam for the UE to use to receive the positioning reference signal based on the received reference signal and the identified co-location ratio and receiving a positioning reference signal at the UE using the determined receiving beam.
[0008] [0008] An apparatus for wireless communication in an UE is described. The device may include a processor, memory in electronic communication with the processor and instructions stored in memory. The instructions can be executed by the processor to make the device identify an almost co-location relationship that indicates that one or more antenna ports of a base station used to transmit a reference signal are almost co-located with one or more base station antenna ports used to transmit a positioning reference signal, receive the reference signal at the UE, determine a receive beam for the UE to use to receive the positioning reference signal based on the received reference signal and in the identified co-location ratio and receive a positioning reference signal in the UE using the determined receiving beam.
[0009] [0009] Another device for wireless communication in an UE is described. The apparatus may include means for identifying an almost co-location relationship that indicates that one or more base station antenna ports used to transmit a reference signal are nearly co-located with one or more base station antenna ports used to transmit a positioning reference signal, receiving the reference signal at the UE, determining a reception beam for the UE to use to receive the positioning reference signal based on the received reference signal and the near-coefficient ratio. identified location and receive a positioning reference signal at the UE using the determined receiving beam.
[0010] [0010] A non-transitory computer-readable medium that stores a code for wireless communication in an UE is described. The code may include instructions executable by a processor to identify an almost co-location relationship that indicates that one or more antenna ports of a base station used to transmit a reference signal are almost co-located with one or more antenna ports base station used to transmit a positioning reference signal, receiving the reference signal at the UE, determining a reception beam for the UE to use to receive the positioning reference signal based on the received reference signal and the relationship almost identified co-location and receive a positioning reference signal in the UE using the determined receiving beam.
[0011] [0011] In some examples of the method, apparatus and medium that can be read by a non-transitory computer described here, determining the reception beam for the UE to use to receive the positioning reference signal may include operations, resources, means or instructions to measure a signal strength of the reference signal, and the method further includes identifying the receiving beam based on the measured signal strength and the identified near-co-location ratio.
[0012] [0012] Some examples of the method, apparatus and medium that can be read by a non-transitory computer described herein may additionally include operations, resources, means or instructions for receiving system information that include an indication of the near-co-location relationship from the station base.
[0013] [0013] In some examples of the method, devices and medium that can be read by a non-transitory computer described here, the relationship of almost co-location is pre-configured.
[0014] [0014] Some examples of the method, apparatus and medium that can be read by a non-transitory computer described herein may additionally include operations, resources, means or instructions for receiving a set of cell identifiers for cells that transmit positioning and monitoring reference signals to positioning reference signals from one or more of the cells based on the received set of cell identifiers.
[0015] [0015] In some examples of the method, apparatus and medium that can be read by a non-transitory computer described here, receiving the set of cell identifiers for the cells that transmit the positioning reference signals may include operations, resources, means or instructions for receive radio resource control (RRC), or system information, or downlink control information (DCI), or a positioning protocol message or a combination of them that indicates the set of cell identifiers.
[0016] [0016] Some examples of the method, apparatus and medium that can be read by a non-transitory computer described herein may additionally include operations, resources, means or instructions for receiving, in the UE, a second reference signal from a second cell and a third reference signal, determine a second receiving beam and a third receiving beam for the UE to use to receive positioning reference signals, receiving a second positioning reference signal using the determined second and third receiving beam positioning reference signal using the third determined receiving beam and determining a position of the UE based on the received positioning reference signal, the second positioning reference signal received and the third positioning reference signal received.
[0017] [0017] In some examples of the method, apparatus and medium that can be read by a non-transitory computer described here, the reference signal includes a synchronization signal or a reference signal for indication of channel status (CSI-RS) for tracking or a CSI-RS for beam management or a CSI-RS for radio resource management or a physical broadcast channel demodulation reference (DMRS) signal (PBCH) or a combination of them.
[0018] [0018] In some examples of the method, apparatus and medium capable of being read by a non-transitory computer described herein, the reference signal may be a synchronization signal that includes a primary synchronization signal (PSS) or a secondary synchronization signal (SSS ) or a combination of them.
[0019] [0019] In some examples of the method, apparatus and medium capable of being read by a non-transitory computer described herein, the quasi-co-location relationship includes a Doppler shift or a Doppler spread, or a medium delay, or a spread delay, or one or more spatial parameters or a combination of them.
[0020] [0020] A method of wireless communication at a base station is described. The method may include identifying an almost co-location relationship that indicates that one or more base station antenna ports used to transmit a reference signal are almost co-located with one or more base station antenna ports used to transmit a positioning reference signal and transmitting an indication of the almost co-location relationship.
[0021] [0021] A device for wireless communication at a base station is described. The device may include a processor, memory in electronic communication with the processor and instructions stored in memory. The instructions can be executed by the processor to make the device identify an almost co-location relationship that indicates that one or more base station antenna ports used to transmit a reference signal are almost co-located with one or more ports base station antennas used to transmit a positioning reference signal and transmit an indication of the near co-location relationship.
[0022] [0022] Another device for wireless communication at a base station is described. The apparatus may include means for identifying an almost co-location relationship that indicates that one or more base station antenna ports used to transmit a reference signal are almost co-located with one or more base station antenna ports used to transmit a positioning reference signal and transmit an indication of the near co-location relationship.
[0023] [0023] A non-transitory computer-readable medium that stores a code for wireless communication in a base station is described. The code may include instructions executable by a processor to identify an almost co-location relationship that indicates that one or more base station antenna ports used to transmit a reference signal are almost co-located with one or more antenna ports on the base station. base station used to transmit a positioning reference signal and to transmit an indication of the near co-location relationship.
[0024] [0024] Some examples of the method, apparatus and medium that can be read by a non-transitory computer described herein may additionally include operations, resources, means or instructions for transmitting the reference signal and the positioning reference signal based on the transmitted indication of the relationship almost co-location.
[0025] [0025] In some examples of the method, apparatus and medium that can be read by a non-transitory computer described here, the reference signal includes a synchronization signal, or a CSI-RS for tracking, or a CSI-RS for beam management, or a CSI-RS for radio resource management, or a PBCH, or a DMRS, or a combination of them.
[0026] [0026] In some examples of the method, apparatus and medium that can be read by a non-transitory computer described here, the reference signal may be a synchronization signal that includes a PSS, or an SSS, or a combination of them.
[0027] [0027] In some examples of the method, devices and medium that can be read by a non-transitory computer described here, transmitting the indication of the almost co-location relationship may include operations, resources, means or instructions for transmitting system information that includes indication of the almost co-location relationship.
[0028] [0028] Some examples of the method, apparatus and medium that can be read by a non-transitory computer described here, may additionally include operations, resources, means or instructions for transmitting a set of cell identifiers to cells that transmit positioning reference signals.
[0029] [0029] In some examples of the method, apparatus and medium that can be read by a non-transitory computer described here, transmitting the set of cell identifiers to the cells that transmit the positioning reference signals may include operations, resources, means or instructions for transmitting an RRC message, or a DCI, or a positioning protocol message, or a combination of them indicating the set of cell identifiers.
[0030] [0030] In some examples of the method, apparatus and medium readable by a non-transitory computer described herein, the quasi-co-location relationship includes a Doppler shift or a Doppler spread, or a medium delay, or a spread delay, or one or more spatial parameters or a combination of them. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] [0031] Figure 1 shows an example of a wireless communication system that supports downlink position reference signals in multi-beam systems, according to aspects of the present disclosure.
[0032] [0032] Figure 2 shows an example of a wireless communications system that supports downlink position reference signals in multi-beam systems, according to aspects of the present disclosure.
[0033] [0033] Figure 3 shows an example of a process flow that supports downlink position reference signals in multi-beam systems, according to aspects of the present disclosure.
[0034] [0034] Figure 4 shows an example of a process flow that supports downlink position reference signals in multi-beam systems, according to aspects of the present disclosure.
[0035] [0035] Figures 5 to 7 show block diagrams of a device that supports reference signals of downlink positioning in multi-beam systems, according to aspects of the present disclosure.
[0036] [0036] Figure 8 shows a block diagram of a system that includes a UE that supports reference signals of downlink positioning in multi-beam systems, according to aspects of the present disclosure.
[0037] [0037] Figures 9 to 11 show block diagrams of a device that supports downlink position reference signals in multi-beam systems, according to aspects of the present disclosure.
[0038] [0038] Figure 12 shows a block diagram of a system that includes a base station that supports reference signals for downlink positioning in multi-beam systems, according to aspects of the present disclosure.
[0039] [0039] Figures 13 to 16 show methods for reference signal of downlink positioning in multi-beam systems, according to aspects of the present disclosure. DETAILED DESCRIPTION
[0040] [0040] In some examples of a wireless communication system, such as a millimeter wave system (mmW) or new radio system (NR), wireless communication devices can communicate through directional transmissions (such as, for example, beams), in which beam formation can be applied using elements from multiple antennas to provide a beam in a specific direction. Such examples of a wireless communications system can support positioning services that can use downlink-based positioning in a multi-beam system.
[0041] [0041] In some cases, supporting downlink-based positioning in multi-beam systems may include a base station or cell that sends a PRS through different transmission beams to meet base station or cell coverage requirements. It can also include the UE that measures PRS from multiple stations or base cells (such as at least three) to support UE positioning. In some cases, a base station may not be aware of a specific UE location, such as when a communications gap occurs while a UE is in motion. When a base station does not know the direction in which it transmits to a UE, the base station can transmit to the UE by scanning through a set of transmission beams focused in different directions, and transmits data and / or reference signals (such as, for example, a PRS) in each of the bundles. In addition or alternatively, the UE can scan through a set of reception beams in an attempt to locate and identify an ideal reception beam on which the UE can receive the signals that the base station is transmitting. Sweeping through a bundle multiple times can be costly in terms of time, energy consumption and resources. If a UE scans through multiple reception beams to receive one or more signals, which include PRSs, the measurement latency in the UE can be high.
[0042] [0042] Alternatively, a base station can configure its antenna or antennas in such a way that the antenna ports used to transmit reference signals (such as, for example, synchronization signals, reference signals of channel state information (CSI- RS) for beam tracking or management, physical broadcast channel signals (PBCH), demodulation reference signals (DRMS)) are spatially almost co-located (QCL) with the antenna ports used to transmit PRS transmissions. When reference signals and PRSs are transmitted via antenna ports that are QCL, the UE can receive both signals using the same receiving beam. A base station can indicate the QCL configuration for the UE. The UE can receive reference signals and use the reference signals to determine a preferred receiving beam. In addition or alternatively, the UE can receive reference signals and use the reference signals to determine a preferred receiving beam. The UE can then receive the PRS transmissions via the same preferred receiving beam. Since the UE can receive the PRS without scanning beams through multi-receiving beams, the UE can save processing overhead and decrease measurement latency.
[0043] [0043] Aspects of the disclosure are described initially in the context of a wireless communications system. Disclosure aspects are also shown and described with reference to the process flow diagrams. Aspects of the disclosure are shown and further described with reference to device diagrams, system diagrams and flowcharts that refer to the downlink position reference signal in multi-beam systems.
[0044] [0044] Figure 1 shows an example of a wireless communication system 100 according to various aspects of the present disclosure. The wireless communications system 100 includes base stations 105, UEs 115 and a basic network 130. In some instances, the wireless communications system 100 may be an LTE, LTE-Advanced (LTE-A) network or a New Network. Radio (NR). In some cases, the wireless communication system 100 can support enhanced mobile broadband communications, ultra-reliable (i.e., mission critical) communications, low latency communications or communications with low cost and low complexity devices.
[0045] [0045] Base stations 105 can communicate wirelessly with UEs 115 through one or more base station antennas. The base stations 105 described herein may include or may be referred to those skilled in the art as a base transceiver station, a radio base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB), a Node Next-generation B or giga-NodeB (any of which may be referred to as a gNB), a Native Node, a Native eNodeB or some other suitable terminology. Wireless communications system 100 may include base stations 105 of different types (such as, for example, macro base stations or small cells). The UEs 115 described herein may be able to communicate with various types of base stations 105 and network equipment that include macro eNBs, small cell eNBs, gNBs, relay base stations and the like.
[0046] [0046] Each base station 105 can be associated with a specific geographic coverage area 110 in which communications with different UEs are supported
[0047] [0047] Geographic coverage area 110 for a base station 105 can be divided into sectors that make up only a part of geographic coverage area 110 and each sector can be associated with a cell. For example, each base station 105 can provide communication coverage for a macro cell, a small cell, a hot spot or other types of cells, or various combinations of them. In some examples, a base station 105 can be mobile and therefore provide communication coverage for a mobile geographic coverage area
[0048] [0048] The term "cell" refers to a logical communication entity used to communicate with a base station 105 (such as, for example, through a carrier) and can be associated with an identifier to distinguish neighboring cells (such as, for example, a physical cell identifier (PCID), a virtual cell identifier (VCID) that work through the same or a different carrier. In some instances, a carrier can support multiple cells and different cells can be configured according to different types of protocol (such as, for example, mechanical type communication (MTC), narrowband Internet of Things (NB-IoT ), enhanced mobile broadband (eMBB) or others) that can provide access to different types of devices. In some cases, the term “cell” may refer to a part of a geographic coverage area 110 (such as a sector) through which the logical entity works.
[0049] [0049] UEs 115 can be dispersed throughout the wireless communication system 100 and each UE 115 can be stationary or mobile. A UE 115 can also be referred to as a mobile device, a wireless device, a remote device, a handheld device or a subscriber device or some other suitable terminology, where the “device” can also be referred to as a unit, station, terminal or customer. An UE 115 can also be a personal electronic device, such as a cell phone, personal digital assistant (PDA), tablet computer, laptop computer or personal computer. In some examples, an UE 115 may also refer to a wireless local loop station (WLL), an Internet of Things (IoT) device, an Internet of Everything (IoE) device or an MTC device, or the like, that can be implemented in various articles, such as appliances, vehicles, meters or similar.
[0050] [0050] Some UEs 115, such as MTC or IoT devices, can be low cost or low complexity devices and can provide automated communication between machines (such as, for example, through Machine-to-Machine (M2M) communication). M2M or MTC communication can refer to data communication technologies that allow devices to communicate with each other or with a base station 105 without human intervention. In some examples, M2M or MTC communication may include communications from devices that integrate sensors or meters to measure or capture information and relay it to a central server or application program that can make use of the information or present the information to humans who interact with the program or application. Some UEs 115 can be designed to collect information or allow automated machine behavior. Examples of applications for MTC devices include smart metering, stock monitoring, water level monitoring, equipment monitoring, health care monitoring, wildlife monitoring, monitoring of climatic and geological events, fleet management and tracking, detection and remote security, remote security sensing, physical access control and transaction-based business charging.
[0051] [0051] Some 115 UEs can be configured to use operational modes that reduce energy consumption, such as half-duplex communications (such as, for example, a mode that supports unidirectional communication through transmission or reception, but not transmission and reception simultaneously). In some instances, half-duplex communications can be carried out at a reduced peak rate. Other energy-saving techniques for UEs 115 include going into energy-saving “hibernation” mode when they are not articulated in active communications or operating over a limited bandwidth (such as, for example, according to narrowband communications) . In some cases, UEs 115 can be designed to support critical functions (such as mission critical functions), and a wireless communications system 100 can be configured to provide ultra-reliable communications for those functions.
[0052] [0052] In some cases, a UE 115 can also communicate directly with other UEs 115 (as, for example, using a point-to-point protocol (P2P) or device to device (D2D)). One or more of a group of UEs 115 using D2D communications may be within the geographical coverage area 110 of a base station 105. Other UEs 115 in such a group may be outside the geographical coverage area 110 of a base station 105 or may otherwise be unavailable to receive transmissions from a base station 105. In some cases, groups of UEs 115 communicating via D2D communications may use a one to many (1: M) system in which each UE 115 transmits to all other UEs 115 in the group. In some cases, a base station 105 makes it easy to program resources for D2D communications. In other cases, D2D communications are ported between UEs 115 without the involvement of a base station 105.
[0053] [0053] Base stations 105 can communicate with basic network 130 and with each other. For example, base stations 105 can interface with basic network 130 through return transport links 132 (such as, for example, through an S1 or other interface). Base stations 105 can communicate via return transport links 134 (such as via an X2 or other interface) either directly (such as, directly between base stations 105) or indirectly (such as, for example, through basic network 130).
[0054] [0054] The basic network 130 can provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity and other access, routing or mobility functions. Core network 130 can be an evolved packet core (EPC), which can include at least one mobility management entity (MME), at least one service gateway (S-GW) and at least one Data Network gateway in Package (PDN) (P- GW). MME can manage stratum functions without access (such as a control plan), such as mobility, authentication and bearer management for UEs 115 served by base stations 105 associated with EPC. User IP packets can be transferred via S-GW, which can be connected to P-GW. P-GW can provide IP address allocation, as well as other functions. The P-GW can be connected to the IP services of network carriers. Carrier IP services may include Internet access, intranet (s), an IP Multimedia Subsystem (IMS) or a Packet Switched (PS) Streaming Service.
[0055] [0055] At least some of the network devices, such as a base station 105, may include subcomponents, such as an access network entity, which can be an example of an access node controller (ANC). Each access network entity can communicate with UEs 115 through a number of other access network transmission entities, which can be referred to as a radio head, an intelligent radio head or a transmit / receive point ( TRP). In some configurations, multiple functions of each access network entity or base station 105 can be distributed across multiple network devices (such as radio heads and access network controllers) or consolidated into a single network device (such as a base station 105).
[0056] [0056] The wireless communications system 100 can operate using one or more frequency bands, typically in the range of 300 MHz to 300 GHz. In general, the 300 MHz to 3 GHz region is known as the frequency region ultra-high (UHF) or decimeter band, since wavelengths vary from approximately one decimeter to one meter in length. UHF waves can be blocked or redirected by buildings and environmental features. However, the waves can penetrate the structures enough for a macro-cell to provide service to the internally located UEs 115. The transmission of UHF waves can be associated with smaller and smaller band antennas (such as, for example, less than 100 km) when compared to transmission that uses lower frequencies and longer waves of the higher frequency (HF) part or frequency very high (VHF) spectrum below 300 MHz.
[0057] [0057] The wireless communication system 100 can also operate in a super high frequency region (SHF) using frequency bands from 3 GHz to 30 GHz, also known as the centimeter band. The SHF region includes bands, such as the 5 GHz industrial, scientific and medical (ISM) bands, which can be used opportunistically by devices that can tolerate interference from other users.
[0058] [0058] Wireless communication system 100 can also operate in an extremely high frequency spectrum (EHF) region (such as, for example,
[0059] [0059] In some cases, the wireless communications system 100 may use both licensed and unlicensed radio spectrum bands. For example, wireless communication system 100 may use License Assisted Access (LAA), Unlicensed LTE (LTE-U) radio access technology or NR technology in an unlicensed band, such as the ISM band of 5 GHz. When operating on unlicensed radio spectrum bands, wireless devices, such as base stations 105 and UEs 115, can use listening before speaking (LBT) procedures to ensure that a frequency channel is cleared before to transmit data. In some cases, operation on unlicensed bands may be based on a CA configuration in conjunction with CCs that operate on a licensed band (such as LAA). Operation on unlicensed spectrum may include downlink transmissions, uplink transmissions, point-to-point transmissions or a combination of them. Duplexing in the unlicensed spectrum can be based on frequency division duplexing (FDD), time division duplexing (TDD) or a combination of them.
[0060] [0060] In some examples, the base station 105 or UE 115 can be equipped with multiple antennas, which can be used to apply techniques such as diversity of transmission, diversity of reception, communication multiple-input multiple-outputs (MIMO) or training bundles. For example, the wireless communications system may use a transmission scheme between a transmission device (such as a 105 base station) and a receiving device (such as a UE 115), where the The transmitting device is equipped with multiple antennas and the receiving devices are equipped with one or more antennas. MIMO communications can use multipath signal propagation to increase spectral efficiency by transmitting or receiving multiple signals through different spatial layers, which can be referred to as spatial multiplexing. The multiple signals can, for example, be transmitted by the transmission device via different antennas or different combinations of antennas. Likewise, multiple signals can be received by the receiving device via different antennas or different combinations of antennas.
[0061] [0061] Beam formation, which can also be referred to as spatial filtering, directional transmission or directional reception, is a signal processing technique that can be used in a transmitting or receiving device (such as, for example, a station base 105 or UE 115) to form or direct an antenna beam (such as a transmit beam or receive beam) along a spatial path between the transmitting device and the receiving device. The formation of beams can be achieved by combining the signals communicated by means of antenna elements of an antenna array, such that the signals that propagate in specific orientations with respect to an antenna array experience constructive interference, while others experience destructive interference. The adjustment of the signals communicated by means of the antenna elements may include a transmitting device or a receiving device that applies certain amplitudes and phase shifts to the signals carried through each of the antenna elements associated with the device. The settings associated with each of the antenna elements can be defined by a set of beamforming weights associated with a specific orientation (such as, for example, with respect to the antenna arrangement of the transmitting or receiving device, or with respect to some other orientation).
[0062] [0062] In one example, a base station 105 may use multiple antennas or antenna array to conduct beamforming operations for directional communications with a UE 115. For example, some signals (such as synchronization signals, signals reference signals, beam selection signals or other control signals) can be transmitted by a base station 105 multiple times in different directions, which may include a signal that is transmitted according to different sets of beam-forming weights associated with different transmission directions. Transmissions in different beam directions can be used to identify (as, for example, by base station 105 or a receiving device, such as a UE 115) a beam direction for subsequent transmission and / or reception by base station 105. Some signals, such as data signals associated with a particular receiving device, can be transmitted by a base station 105 in a single beam direction (such as, for example, a direction associated with the receiving device, such as a UE 115). In some examples, the beam direction associated with transmissions along a single beam direction can be determined based, at least in part, on a signal that has been transmitted in different beam directions. For example, an UE 115 may receive one or more of the signals transmitted by the base station 105 in different directions, and the UE 115 may report to the base station 105 an indication of the received signal with a higher signal quality, or else a signal quality. acceptable signal. Although these techniques are described with reference to signals transmitted in one or more directions by a base station 105, a UE 115 can use similar techniques to transmit signals multiple times in different directions (such as, for example, to identify a beam direction for transmission subsequent reception or reception by the UE 115) or transmit a signal in a single direction (such as, for example, to transmit data to a receiving device).
[0063] [0063] A receiving device (such as a UE 115, which can be an example of a mmW receiving device) can experience multi-receiving beams when receiving various signals from base station 105, such as synchronization signals, reference signals, beam selection signals or other control signals. For example, a receiving device can experience multiple reception directions by receiving through different antenna sub-arrays, by processing signals received according to different antenna sub-arrays, by receiving according to different sets of weights of receiving beamforming applied to signals received on a plurality of antenna elements of an antenna, or by processing received signals according to different sets of receiving beamforming weights applied to signals received on a plurality of antenna of an array of antennas, any of which can be referred to as “listening”, according to different reception beams or reception directions. In some instances, a receiving device may use a single receiving beam for receiving along a single beam direction (such as when receiving a data signal). The single receiving beam can be aligned in a determined beam direction based, at least in part, on listening, according to different receiving beam directions (such as, for example, a beam direction determined to have an intensity of higher signal, a higher signal-to-noise ratio or else an acceptable signal quality based, at least in part, on listening, according to multiple beam directions).
[0064] [0064] In some cases, the antennas of a 105 or UE 115 base station may be located within one or more antenna arrays, which can support MIMO operations or transmit or receive beam formation. For example, one or more base station antennas or antenna arrays can be co-located in an antenna assembly, such as an antenna tower. In some cases, antennas or antenna arrays associated with a base station 105 may be located in several geographic locations. A base station 105 can have an antenna array with a number of rows and columns of antenna ports that base station 105 can use to support the formation of communications beams with a UE 115. Likewise, a UE 115 can have one or more array of antennas that can support various MIMO or beam forming operations.
[0065] [0065] In some cases, the wireless communications system 100 may be a packet-based network that operates according to a layered protocol stack. At the user level, carrier communications or the Packet Data Convergence Protocol (PDCP) layer can be IP based. A Radio-Link Control (RLC) layer can, in some cases, perform segmentation and reassembly of packets to communicate through logical channels. A Media Access Control (MAC) layer can perform priority handling and multiplex logical channels in transport channels. The MAC layer can also use hybrid automatic retry request (HARQ) to provide retransmission at the MAC layer to improve link efficiency. In the control plane, the Radio Resource Control (RRC) protocol layer can provide for establishing, configuring and maintaining an RRC connection between a UE 115 and a base station 105 or basic network 130, which supports radio carriers for data user plan. In the Physical layer (PHY), transport channels can be mapped to physical channels.
[0066] [0066] In some cases, UEs 115 and base stations 105 can support data retransmissions to increase the likelihood that data will be received successfully. HARQ feedback is a technique to increase the likelihood that data will be received correctly via a communication link
[0067] [0067] Time intervals in LTE or NR can be expressed in multiples of a basic time unit, which can, for example, refer to a sampling period of Ts = 1 / 30,720,000 seconds. The time intervals of a communication resource can be organized according to the radio frames, each with a duration of 10 milliseconds (msec), where the frame period can be expressed as Tf = 307,200 Ts. Radio frames can be identified by a system frame number (SFN) ranging from 0 to 1023. Each frame can include 10 sub frames numbered from 0 to 9 and each sub frame can have a duration of 1 msec. A subframe can be further divided into 2 partitions, each lasting 0.5 msec, and each partition can contain 6 or 7 modulation symbol periods (such as, depending on the length of the cyclic prefix attached to each period symbols).
[0068] [0068] In some wireless communication systems, a partition can be further divided into multiple mini-partitions that contain one or more symbols. In some cases, a mini-partition or mini-partition symbol may be the smallest programming unit. Each symbol can vary in duration, depending on the spacing of the subcarrier or the operating frequency band, for example. In addition, some wireless communication systems may implement partition aggregation, in which multiple partitions or mini-partitions are aggregated together and used for communication between an UE 115 and the base station 105.
[0069] [0069] The term “bearer” refers to a set of radio frequency spectrum resources that have a physical layer structure defined to support communications over a communication link 125. For example, a bearer of a communication link 125 it may include a part of a radio frequency spectrum band that is operated according to the channels of the physical layer for a given radio-access technology.
[0070] [0070] The organizational structure of carriers may be different for different radio-access technologies (such as, for example, LTE, LTE-A, NR, etc.). For example, communications through a carrier can be organized according to TTIs or partitions, each of which can include user data, as well as control or signaling information to support the decoding of user data. A carrier may also include dedicated acquisition signaling (such as, for example, synchronization signals or system information, etc.) and control signaling that coordinates operation for the carrier. In some examples (for example, in a carrier aggregation configuration), a carrier may also have acquisition signaling or control signaling that coordinates operations for other carriers.
[0071] [0071] Physical channels can be multiplexed on a carrier according to different techniques. A physical control channel and a physical data channel can be multiplexed on a downlink carrier, for example, using time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques or hybrid techniques of TDM-FDM. In some instances, control information transmitted on a physical control channel can be distributed between different control regions in a cascade mode (such as between a common control region or a common search space and one or more regions specific EU control systems or EU-specific search spaces).
[0072] [0072] A carrier can be associated with a specific bandwidth of the radio frequency spectrum and, in some examples, the carrier bandwidth can be referred to as the "system bandwidth" of the carrier or wireless communications system 100 For example, carrier bandwidth can be one of a number of predetermined bandwidths for carriers of a specific radio access technology (such as, for example, 1.4, 3, 5, 10, 15, 20 , 40 or 80 MHz). In some examples, each UE 115 served may be configured to operate over parts or all of the carrier bandwidth. In other examples, some UEs 115 can be configured to operate using a type of narrowband protocol that is associated with a predefined part or range (such as a set of subcarriers or RBs) within a carrier (such as, for example, “in-band” deployment of a type of narrowband protocol).
[0073] [0073] In a system that uses MCM techniques, a feature element can consist of a symbol period (such as, for example, a modulation symbol duration) and a subcarrier, where the symbol period and the spacing of subcarrier are inversely related. The number of bits carried by each resource element may depend on the modulation scheme (such as the order of the modulation scheme). Thus, the more resource elements a UE 115 receives and the higher the order of the modulation scheme, the higher the data rate can be for the UE 115. In MIMO systems, a wireless communications resource can refer to a combination of a radio frequency spectrum resource, a time resource and a space resource (such as space layers), and the use of multiple space layers can further increase the data rate for communications with an UE 115.
[0074] [0074] Wireless communication system devices 100 (such as base stations 105 or UEs 115) may have a hardware configuration that supports communications over a specific carrier bandwidth, or may be configurable to support communications across one of a set of carrier bandwidths. In some examples, the wireless communications system 100 may include base stations 105 and / or UEs that can support simultaneous communications through associated carriers with more than a different carrier bandwidth.
[0075] [0075] Wireless communication system 100 can support communication with a UE 115 in multiple cells or carriers, a feature that can be referred to as carrier aggregation (CA) or multi-carrier operation. A UE 115 can be configured with multiple downlink CCs and one or more uplink CCs, according to a carrier aggregation configuration. Carrier aggregation can be used with both FDD and TDD component carriers.
[0076] [0076] In some cases, the wireless communications system 100 may use enhanced component carriers (eCCs). An eCC can be characterized by one or more features, which include broad carrier bandwidth or frequency channel, shorter symbol duration, shorter TTI duration or modified control channel configuration. In some cases, an eCC can be associated with a carrier aggregation configuration or a dual connectivity configuration (such as, for example, when multiple server cells have a sub-optimal or non-optimal return transport link). An eCC can also be configured for use on unlicensed spectrum or shared spectrum (such as where more than one operator is allowed to use the spectrum). An eCC characterized by broad carrier bandwidth can include one or more segments that can be used by UEs 115 that are not able to monitor all carrier bandwidth or are otherwise configured to use bandwidth limited carrier (such as to save energy).
[0077] [0077] In some cases, an eCC may use a different symbol duration than other CCs, which may include the use of a reduced symbol duration compared to the symbol durations of the other CCs. A shorter symbol life can be associated with increased spacing between adjacent subcarriers. A device, such as an UE 115 or base station 105, that uses eCCs, can transmit broadband signals (such as, for example, according to frequency, channel, or carrier bandwidths of 20, 40, 60, 80 MHz , etc.) at reduced symbol durations (such as 16.67 microseconds). A TCC in the eCC can consist of one or multiple symbol periods. In some cases, the duration of TTI (that is, the number of symbol periods in a TTI) can be variable.
[0078] [0078] Wireless communication systems, such as an NR system, can use any combination of licensed, shared and unlicensed spectrum bands, among others. The flexibility of the eCC symbol duration and spacing between subcarriers can allow the use of eCC across multiple spectra. In some instances, the shared NR spectrum can increase spectrum usage and spectral efficiency, specifically through dynamic vertical sharing of resources (such as, through frequency) and horizontal (such as, through time) .
[0079] [0079] In some examples, a base station 105 can transmit a reference signal (such as synchronization signals, CSI-RS for beam tracking or management, CSI-RS for radio resource management, PBCH signals, DRMS) for a UE 115. The UE 115 may also be aware of an almost co-location relationship between antenna ports used to transmit the reference signal and antenna ports used to transmit a PRS. The UE 115 can use the receiving beam determined by receiving the reference signal to receive a PRS from base station 105. The UE 115 can receive PRSs from multiple base stations 105 using such techniques in order to triangulate the position of UE 115 using three or more PRSs.
[0080] [0080] Figure 2 shows an example of a wireless communications system 200 that supports downlink position reference signals in multi-beam systems, according to various aspects of the present disclosure. In some examples, the wireless communications system 200 may implement aspects of the wireless communications system 100. The wireless communications system 200 may support millimeter wave (mmW) communication, new radio communications (NR), LTE communication or any other wireless communication. The wireless communications system 200 can include base station 105-a and UE 115-a, which can be examples of the corresponding devices described with reference to Figure 1
[0081] [0081] The base station 105-a can communicate with the UE 115-a through directional transmissions (such as beams). In some examples, base station 105-a may provide services using positioning support, or PRS. For example, emergency services may use PRS transmissions. Emergency services may include 911 calls, which include E911 services or other emergency communications. Location-based services may also use PRS transmissions and may include map services, global positioning system (GPS) services or navigation services. In addition, some services are best used when precise positioning is available (such as mission critical services, etc.). The wireless communications system 200 can support downlink-based positioning (such as UE-based positioning) or uplink-based positioning (such as network-based positioning). In downlink-based positioning, base station 105-a can transmit a PRS on a downlink to support a positioning procedure. In cases where a base station 105-a and UE 115-a support NR communications, base station 105-a can transmit an NR-PRS to support various services.
[0082] [0082] A wireless communications system (such as an NR system) can support single beam and / or multi-beam system operations. For example, a single beam can be enabled for frequency bands below 3 GHz. In some instances, multi-beam communications can be enabled for higher frequency bands of 3 GHz or even higher, which include mmW frequencies. In examples where base station 105-a and UE 115-a use multi-beam communications, base station 105-a can determine a preferred transmit beam and UE 115-a can determine a preferred receive beam in such a way that successful transmission and reception are likely at a given location of UE 115-a.
[0083] [0083] For example, to support applications that rely on positioning procedures, the base station 105-a can articulate in a beam-scanning procedure (such as, for example, PRSs transmission in 205 directional multi-beam, each directional beam 205 corresponding to an antenna port configuration that results in a different transmission direction) to identify the preferred transmission beam 205 and satisfy any specific cell coverage or base station 105-a requirements. The UE 115-a can articulate in a beam scan procedure to identify the preferred receiving beam 210. The UE 115-a can receive PRSs from base station 105-a and other base stations 105 (such as, for example, at least three total base stations) and can measure the PRSs received to support positioning procedures. In some cases, the UE 115-a may not be aware of a preferred receiving beam on which it receives a PRS. In such examples, the UE 115-a can articulate in beam scanning procedures (such as receiving PRSs in multiple directional beams 210, with each directional beam 210 corresponding to an antenna port configuration resulting in a direction different reception). The UE 115-a and the base station 105-a can identify a preferred transmission beam 205 (such as the transmission beam 205-d) and a preferred receive beam 210 (such as the receive beam 210 -b) in which it communicates current and / or subsequent transmissions.
[0084] [0084] In some cases, the UE 115-a can be mobile and can be repositioned before or during communication. In such examples, the base station 105-a can consider the number of reception beams that the UE 115-a uses to measure received signals, which results in multiple iterations of a beam-scanning procedure. That is, the base station 105-a can be configured to use a number of transmission beams 205 (such as, for example, 8 transmission beams). Base station 105-a may also be aware that UE 115-a is configured to use a number of receive beams 210 (such as, for example, 4 receive beams). In such cases, the base station 105-a can perform multiple beam-scan iterations, for example, scanning through the transmission beams 205 four times (once for each of the receiving beams 210-a through 210-d). Thus, the base station 105-a can transmit a broadcast or reference signal 32 times (8 transmit beams times 4 receive beams) to identify a preferred transmit / receive beam pair 215. Or, as another example, if the base station 105-a has 64 different transmission beams 205 and UE 115-a has four receive beams 210, so base station 105-a can transmit a reference or broadcast signal up to 256 times to identify a pair of beams preferred transmit / receive 215. Such examples can lead to excessive processing and resource overhead on base station 105-a. As the UE 115-a can scan beams through multiple receiving beams 210, the UE 115-a can suffer from high processing overhead and increased measurement latency.
[0085] [0085] Alternatively, base station 105-a and UE 115-a can use antenna port positioning to increase the efficiency of downlink PRS transmissions in a multi-beam system.
[0086] [0086] In some examples, the base station 105a can configure transmit / receive antennas, such that the antenna ports used to transmit reference signals (such as PRS) can be spatially dispersed QCL with the antenna ports used to transmit broadcast signals, such as broadcast signals or reference signals. In some cases, broadcast signals or reference signals may be NR sync signals, such as PSS (such as NR-PSS), SSS (such as NR-SSS) and DMRS PBCH (such as example, DMRS NR-PBCH). Synchronization signals can be used in any RRC state (such as idle RRC or connected RRC). In some cases, broadcast signals or reference signals can be signals used for beam and mobility management, such as CSI-RS. The CSI-RS can be used in a connected RRC state.
[0087] [0087] In some examples, the base station 105- a may transmit an indication of the QCL antenna ports to the UE 115-a. In some instances, the indication can be transmitted via upper layer signaling (such as, for example, RRC signaling). In some examples, the statement may be included in one or more blocks of system information (SIBs). In still other examples, the indication can be included in a random mobile subscriber identification (RMSI), in another system information block (OSIB) or in another transmission of system information. In addition or alternatively, UE 115-a can be preconfigured to identify a QCL configuration on base station 105-a.
[0088] [0088] In some examples, the base station 105a can scan a reference signal or broadcast signal (such as a synchronization signal) through the 205-to-205-h transmission beams for each one of the 210-aa 210-d receiving beams. UE 115-a can monitor and measure synchronization signals from base station 105-a. The UE 115-a can measure only one type of sync signal (such as, for example, only NR-SSS or NR-DMRS) or can measure more than one type of sync signal (such as, for example, NR-SSS and NR-DMRS). The UE 115-a can determine whether to measure just one sync signal or more than one sync signal based on whether the UE 115-a performs a re-selection. In some instances, the UE 115-a may be articulated in a procedure that benefits from monitoring and measuring reference or broadcast signals (such as synchronization signals) from base station 105-a, and thus, no additional or minimum processing overhead or delay is incurred by measuring and monitoring the synchronization signal. Having monitored and measured the synchronization signal, the UE 115-a can identify a preferred receiving beam (such as, for example, the receiving beam 210-b). The UE 115-a can also know that the base station 105-a has been configured in such a way that the antenna ports used to transmit NRPRS are QCL spatially dispersed with the antenna ports used to transmit NR broadcast signals or NR reference signals . Thus, UE 115-a can determine that the preferred receiving beam 205-b is the preferred receiving beam for receiving PRS from base station 105-a.
[0089] [0089] Base station 105-a can transmit one or more PRSs to UE 115-a. In some examples, the base station 105-a can scan the PRSs through transmission beams from 205-a to 205-h. UE 115-a can receive PRSs via the preferred receiving beam 210-b. In some instances, the UE 115-a may not articulate in a beam-scanning procedure to identify a preferred receiving beam 210, because the UE 115-a has already identified the preferred receiving beam 210-b and is aware that the base station 105-a will transmit the PRSs through antenna ports that are QCL with the antenna ports used to transmit the previously received synchronization signals. Thus, base station 105-a can transmit the PRS once on each of the 205-aa 205-h transmission beams instead of transmitting the PRS several times on each of the transmission beams 205 to identify a receive beam. preferred 210. Since the UE 115-a may have no reason to monitor PRSs in multi-receiving 210 beams, the UE 115-a can preserve processing overhead and reduce measurement latency.
[0090] [0090] Some devices within coverage area 110 may not support certain types of PRS (such as, for example, NR-PRS). In such examples, a network can indicate which cells support NR-PRS transmissions. Such signaling can be done through RRC messages or system information or transmissions of downlink control (DCI) information. The type of signal can be determined based on whether the UE 115-a is in a connected RCC state or can be based on a positioning-related protocol. In such examples, the UE 115-a can use the indication to manage NR-PRS measurements. Base station 105-a can use the indication to transmit only NR-PRSs to certain cells. For example, base station 105-a can transmit NR-PRS to only certain cells based on NR-PRS interference, if certain devices support NR-PRS transmissions, energy savings, cell load or other problems related to positioning performance of EU. For example, UE 115-a may be notified that cells with even cell ID numbers can support PRS transmission and cells with odd cell IDs may not support PRS transmission.
[0091] [0091] Figure 3 shows an example of a process flow 300 that supports downlink position reference signals in multi-beam systems, according to several aspects of the present disclosure. In some examples, process flow 300 can implement aspects of wireless communication systems 100 and 200. Process flow 300 can include base station 105-b and EU 115-b, which can be examples of the corresponding devices described with reference Figures 1 and 2.
[0092] [0092] In the description of process flow 300 below, operations between UE 115-b and base station 105- b can be transmitted in a different order than the exemplary order shown, or operations performed by UE 115-b and base station 105-b can be carried out in different orders or at different times. Certain operations can also be excluded from process flow 300 or other operations can be added to process flow 300.
[0093] [0093] In some respects, process flow 300 shows an example where the antenna ports (such as antenna port configurations) used to transmit sync signal (s) and the antenna ports used to transmit Positioning reference signal (s) are QCL. Before listening for positioning reference signals, the UE 115-b can listen for synchronization signals or the reference signals that are QCL with the PRS. The UE 115-b can find or otherwise determine its best receiving beams (RX) for the transmitted synchronization signals and use them as selected RX beams to receive the reference signals. At 305, UE 115-b can identify a QCL relationship indicating that the base station's antenna ports used to transmit synchronization signals are almost co-located with the base station's antenna ports used to transmit positioning reference signals .
[0094] [0094] In 310, the base station 105-b can transmit and the UE 115-b can receive a synchronization signal. The synchronization signal can be transmitted using a first antenna port configuration. Examples of the sync signal include, but are not limited to, a primary sync signal (PSS), a secondary sync signal (SSS), a beam reference signal (BRS), a tertiary sync signal (TSS), a mobility reference signal, a PBCH signal, CSI-RS and the like. Each synchronization signal discussed can also be an NR synchronization signal (such as, for example, NR-PSS, NR-SSS, NR-PBCH, etc.). The synchronization signal can be transmitted through the PBCH, or similar channel associated with synchronization operations. The synchronization signal can be transmitted in a beamform transmission (such as, for example, a first beamform transmission) from base station 105-b. The synchronization signals can be used in any radio resource control (RCC) state (such as Idle RRC and Connected RRC). CSI-RS can be used for beam management and can be used in Connected RRC states.
[0095] [0095] At 315, UE 115-b can determine a receive beam for UE 115-b to use to receive a PRS based, at least in part, on the received synchronization signal and the identified QCL relationship. This is in accordance with the steps described here. In some respects, the indication may be received before 305, which may contain or otherwise transmit information associated with the configuration of the antenna port used to transmit the synchronization signal. For example, the synchronization signal may contain or not transmit a beam index, antenna port identification information, timing information and the like. Therefore, a UE (such as UE 115-b) that receives the synchronization signal may be able to identify or otherwise determine the first configuration of the antenna port.
[0096] [0096] In some ways, the antenna ports used to transmit the synchronization signal can also be QCL with the antenna ports used to transmit reference signals that can be used to demodulate the PRC.
[0097] [0097] In 320, the UE 115-b receives from the base station 105-b a PRS using the receiving beam determined in 315. As the UE 115-b uses the receiving beam determined in 315, instead of articulating in additional beam scanning, the UE 115-b can reduce processing overhead and measurement latency. In addition, the 105-b base station can reduce processing overhead because it only needs to articulate in a single beam scan, instead of one beam scan for each possible receiving beam.
[0098] [0098] Figure 4 shows an example of a process flow 400 that supports downlink position reference signals in multi-beam systems, according to several aspects of the present disclosure. In some examples, process flow 400 can implement aspects of wireless communication systems 100 and / or 200. In some examples, process flow 400 can include base station 105-c and EU 115-c, which can be examples corresponding devices described with reference to Figures 1-3.
[0099] [0099] In the description of process flow 400 below, operations between UE 115-c and base station 105-c can be transmitted in an order different from the exemplary order shown, or operations performed by UE 115-c and base station 105 -c can be performed in different orders or at different times. Certain operations can also be excluded from process flow 400, or other operations can be added to process flow 400.
[0100] [0100] At 405, UE 115-c can receive an indication of the QCL ratio from base station 105-c. Base station 105-c can transmit an indication that it is using QCL antenna ports where the antenna ports used to transmit synchronization and / or reference signal are QCL with the antenna ports used to transmit the positioning reference signal . The base station 105-c can transmit the indication in a system information transmission that includes a SIB, or an RMSI, or an OSIB, or a combination of them. Thus, the UE 115-c can know that the QCL antenna ports are being used in positioning reference signal transmissions from the base station 105-c.
[0101] [0101] In some examples, the base station 105-
[0102] [0102] In some respects, the indication can be carried on different carriers than those used for the synchronization signal and / or paging signal. For example, base station 105-c can transmit the indication via an LTE / LTE-A and / or NR network (such as a sub-6 GHz network) and then the synchronization signals and / or paging signals can be transmitted over a mmW wireless network (as, for example, in a beamed transmission).
[0103] [0103] In 410, UE 115-c can identify a QCL relationship indicating that base station 105-c's antenna ports used to transmit synchronization signals are almost co-located with base station 105-c's antenna ports used to transmit positioning reference signals. This identification of a QCL relationship can be based on the indication transmitted in 405.
[0104] [0104] At 415, base station 105-c can transmit and UE 115-c can receive a synchronization signal. This might look like 310 in Figure 3. In addition, a second base station 105 (not shown) can transmit a second sync signal and a third base station 105 (also not shown) can transmit a third sync signal, all received by UE 115-c.
[0105] [0105] At 420, the UE 115-c can measure a signal strength of the synchronization signal received in
[0106] [0106] At 430, base station 105-c can transmit (and UE 115-c can receive) a set of cell identifiers for cells that transmit positioning reference signals. Receiving the set of cell identifiers can include receiving an RRC message, or system information, or a DCI, or a positioning protocol message, or a combination of them that indicates the set of cell identifiers.
[0107] [0107] In 435, the UE 115-c can monitor the position reference signals from one or more of the cells based, at least in part, on the received set of cell identifiers received at 430. The UE 115-c can carry out procedures such as cell re-selection (as, for example, in RCC Idle), mobility (as, for example, in Connected RCC) or beam management procedures. As a result, the UE 115-c may be aware of the positioning reference signals. Thus, the UE 115-c can perform positioning procedures without additional processing overhead.
[0108] [0108] In 440, the UE 115-c can receive a PRS from base station 105-c using the receiving beam determined in 425. The UE 115-c can additionally receive a second positioning reference signal using the second determined receiving beam and a third positioning reference signal using the third determined receiving beam. UE 115-c can determine a position of UE 115-c based, at least in part, on the received position reference signals.
[0109] [0109] Figure 5 shows a block diagram 500 of a wireless device 505 that supports downlink position reference signals in multi-beam systems, in accordance with aspects of the present disclosure. The wireless device 505 can be an example of aspects of a user equipment (UE) 115, as described herein. The wireless device 505 can include the receiver 510, the UE communications manager 515 and the transmitter 520. The wireless device 505 can also include a processor. Each of these components can be in communication with each other (for example, through one or more buses).
[0110] [0110] Receiver 510 can receive information such as packages, user data or control information associated with various information channels (such as, for example, control channels, data channels and information related to the downlink position reference signal) multi-beam systems, etc.). The information can be passed on to other components of the device. The receiver 510 can be an example of aspects of the transceiver 835 described with reference to Figure 8. The receiver 510 can use a single antenna or a set of antennas.
[0111] [0111] The UE 515 communications manager can be an example of aspects of the UE 815 communications manager described with reference to Figure 8.
[0112] [0112] The communications manager of UE 515 and / or at least some of its various subcomponents can be implemented in hardware, software executed by a processor, firmware or any combination of them. If implemented in software run by a processor, the functions of the UE 515 communications manager and / or at least some of its various subcomponents can be performed by a general purpose processor, a digital signal processor (DSP), an integrated circuit application specific (ASIC), a field programmable port arrangement (FPGA) or other programmable logic device, discrete or transistor logic port, discrete hardware components or any combination of them designed to perform the functions described in this disclosure. The UE 515 communications manager and / or at least some of its various subcomponents can be physically located in different positions, including being distributed in such a way that parts of functions are implemented in different physical locations by one or more physical devices. In some instances, the UE 515 communications manager and / or at least some of its various subcomponents may be a separate and distinct component according to different aspects of the present disclosure. In other examples, the UE 515 communications manager and / or at least some of its various subcomponents can be combined with one or more other hardware components, which include, but are not limited to, an I / O component, a transceiver , a network server, another computing device, one or more other components described in the present disclosure or a combination of them in accordance with various aspects of the present disclosure.
[0113] [0113] The UE 515 communications manager can identify an almost co-location relationship that indicates that the antenna ports of a base station used to transmit a reference signal are almost co-located with the antenna ports of the base station used to transmit a positioning reference signal, receiving the reference signal at the UE, determining a reception beam for the UE to use to receive the positioning reference signal based on the received reference signal and the near co-relation -identified location and receive a positioning reference signal in the UE using the determined receiving beam.
[0114] [0114] The transmitter 520 can transmit signals generated by other components of the device. In some instances, transmitter 520 may be placed with a receiver 510 within the transceiver module. For example, transmitter 520 can be an example of aspects of transceiver 835 described with reference to Figure 8. Transmitter 520 can use a single antenna or a set of antennas.
[0115] [0115] Figure 6 shows a block diagram 600 of a wireless device 605 that supports downlink position reference signals in multi-beam systems, in accordance with aspects of the present disclosure. The wireless device 605 can be an example of aspects of a wireless device 505 or an UE 115, as described with reference to Figure 5. The wireless device 605 can include the receiver 610, the communications manager of UE 615 and the transmitter 620. The wireless device 605 may also include a processor. Each of these components can be in communication with each other (for example, through one or more buses).
[0116] [0116] The 610 receiver can receive information, such as packets, user data or control information associated with various information channels (such as, for example, control channels, data channels and information related to the positioning reference signal). downlink in multi-beam systems, etc.). The information can be passed on to other components of the device. The receiver 610 can be an example of aspects of the transceiver 835 described with reference to Figure 8. The receiver 610 can use a single antenna or a set of antennas.
[0117] [0117] The UE 615 communications manager can be an example of aspects of the UE 815 communications manager described with reference to Figure 8.
[0118] [0118] The EU communications manager 615 can also include the QCL component 625, the reference signal component 630, the beam determining component 635 and the PRS 640 component.
[0119] [0119] The QCL 625 component can identify an almost co-location relationship that indicates that the base station's antenna ports used to transmit a reference signal are almost co-located with the base station's antenna ports used to transmit a positioning reference signal and receiving an indication from the base station's quasi-location ratio. In some cases, receiving the indication of the near co-location relationship may include receiving a transmission of system information that includes the indication of the near co-location relationship, the transmission of system information, which includes a SIB, an ISMS or another system information block (OSIB), or a combination of them. In some instances, the quasi-co-location relationship comprises a Doppler shift, or a Doppler spread, or a mean delay, or a spread delay, or one or more spatial parameters or a combination of them.
[0120] [0120] The reference signal component 630 can receive the reference signal in the UE and receive, in the UE, a second reference from a second cell and a third reference signal from a third cell. In some cases, the reference signal includes a PSS, or SSS, or a combination of them.
[0121] [0121] The beam determining component 635 can determine a receiving beam for the UE to use to receive the positioning reference signal based on the received reference signal and the identified co-location ratio, identifying the beam of reception based on the measured signal strength and the almost co-location ratio and determine a second reception beam and a third reception beam for the UE to use to receive positioning reference signals. In some cases, determining the receiving beam for the UE to use to receive the positioning reference signal may include measuring the signal strength of the reference signal.
[0122] [0122] The PRS 640 component can receive a positioning reference signal at the UE using the determined receiving beam, receiving a second positioning reference signal using the second determined receiving beam and a third positioning reference signal using the third determined receiving beam and determining a position of the UE based on the received positioning reference signal, the second positioning reference signal received and the third positioning reference signal received.
[0123] [0123] The transmitter 620 can transmit signals generated by other components of the device. In some instances, transmitter 620 may be placed with a receiver 610 within a transceiver module. For example, transmitter 620 may be an example of aspects of transceiver 835 described with reference to Figure 8. Transmitter 620 may use a single antenna or set of antennas.
[0124] [0124] Figure 7 shows a block diagram 700 of an EU 715 communications manager that supports downlink position reference signals in multi-beam systems, in accordance with aspects of the present disclosure. The UE 715 communications manager can be an example of aspects of an UE 515 communications manager, an EU 615 communications manager or an EU 815 communications manager, described with reference to Figures 5, 6 and 8. The UE communications manager 715 may include the QCL component 720, the reference signal component 725, the beam determination component 730, the PRS component 735, the cell identifier component 740, the monitoring component 745 and the monitoring component measurement 750. Each of these modules can communicate, directly or indirectly, with each other (as, for example, through one or more buses).
[0125] [0125] The QCL 720 component can identify an almost co-location relationship that indicates that the antenna ports of a base station used to transmit a synchronization signal are almost co-located with the antenna ports of the base station used to transmit a positioning reference signal and receiving an indication from the base station's near co-location relationship. In some cases, receiving the indication of the near co-location relationship may include receiving a transmission of system information that includes the indication of the near co-location relationship, the transmission of system information including a SIB, or an ISMS or an OSIB, or a combination of them. In some instances, the quasi-co-location relationship comprises a Doppler shift, or a Doppler spread, or a mean delay, or a spread delay, or one or more spatial parameters or a combination of them.
[0126] [0126] The reference signal component 725 can receive the reference signal in the UE and receive, in the UE, a second reference signal from a second cell and a third reference signal from a third cell. A synchronization signal can be an example of the reference signal. In some examples, the reference signal may comprise a synchronization signal, or a CSI-RS for tracking, or a CSI-RS for beam management, or a CSI-RS for radio resource management, or a DMRS PBCH or a CSI-RS, or a combination of them. In some cases, the sync signal includes a PSS, or SSS, or a combination of them.
[0127] [0127] The beam determining component 730 can determine a receiving beam for the UE to use to receive the positioning reference signal based on the received synchronization signal and the identified co-location ratio, identifying the beam of reception based on the measured signal strength and the almost co-location identified and determine a second reception beam and a third reception beam for the UE to use to receive position reference signals. In some cases, determining the receiving beam for the UE to use to receive the positioning reference signal may include measuring the signal strength of the synchronization signal.
[0128] [0128] The PRS 735 component can receive a positioning reference signal at the UE using the determined receiving beam, receiving a second positioning reference signal using the second determined receiving beam and a third positioning reference signal using the third determined receiving beam and determining a position of the UE based on the received positioning reference signal, the second positioning reference signal received and the third positioning reference signal received.
[0129] [0129] The cell identifier component 740 can receive a set of cell identifiers for cells that transmit positioning reference signals. In some cases, receiving the set of cell identifiers for the cells that transmit the positioning reference signals may include receiving an RRC message or system information, or a DCI, or a positioning protocol or system information message, or a combination of them that indicates the set of cell identifiers.
[0130] [0130] The monitoring component 745 can monitor the positioning of the reference signals from one or more of the cells based on the received set of cell identifiers. The measuring component 750 can measure a reference signal received at the UE, where determining the reception beam for the UE to use to receive the positioning reference signal is additionally based on the measured reference signal. In some cases, the measured reference signal includes a DMRS PBCH, or an indication reference signal about CSI-RS channel status, or a combination of them.
[0131] [0131] Figure 8 shows a diagram of a system 800 that includes an 805 device that supports downlink position reference signals in multi-beam systems, in accordance with aspects of the present disclosure. The device 805 can be an example or include the components of the wireless device 505, the wireless device 605 or an UE 115, as described above, for example, with reference to Figures 5 and 6. The device 805 can include components for bidirectional voice and data communication, which includes components for transmitting and receiving communications, which include the UE 815 communications manager, the 820 processor, the 825 memory, the 830 software, the 835 transceiver, the 840 antenna and I / controller The 845. These components can be in electronic communication through one or more buses (such as, for example, the 810 bus). The device 805 can communicate wirelessly with one or more base stations 105.
[0132] [0132] The 820 processor may include an intelligent hardware device (such as a general purpose processor, a DSP, a central processing unit (CPU), a microcontroller, an ASIC, an FPGA, a programmable logic device , a discrete gate component or transistor logic, a discrete hardware component, or any combination thereof). In some cases, the 820 processor can be configured to operate a memory array using a memory controller. In other cases, a memory controller can be integrated with the 820 processor. The 820 processor can be configured to execute computer-readable instructions stored in memory to perform various functions (such as functions or tasks that support the downlink positioning reference in multi-beam systems).
[0133] [0133] Memory 825 can include random access memory (RAM) and exclusive read memory (ROM). The 825 memory can store computer-readable and computer-executable software 830, which includes instructions that, when executed, cause the processor to perform the various functions described here. In some cases, the 825 memory may contain, among other things, a basic input / output system (BIOS) that can control the basic functioning of hardware or software, such as interaction with peripheral components or devices.
[0134] [0134] The 830 software may include code to implement aspects of the present disclosure, which includes code to support the downlink position reference signal in multi-beam systems. The 830 software can be stored in a non-transitory computer-readable medium, such as system memory or other memory. In some cases, the 830 software may not be directly executable by the processor, but it can cause a computer (such as, when compiled and run) to perform the functions described here.
[0135] [0135] The 835 transceiver can communicate bidirectionally, through one or more antennas, wired or wireless links, as described above. For example, the 835 transceiver can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. The 835 transceiver may also include a modem to modulate the packets and supply the modulated packets to the antennas for transmission and to demodulate the packets received from the antennas.
[0136] [0136] In some cases, the wireless device may include a single 840 antenna. However, in some cases, the device may have more than one 840 antenna, capable of simultaneously transmitting or receiving multiple wireless transmissions.
[0137] [0137] The I / O 845 controller can manage input and output signals for the 805 device. The I / O 845 controller can also manage peripherals not integrated in the 805 device. In some cases, the I / O 845 controller can represent a connection or physical port to an external peripheral. In some cases, the I / O 845 controller may use an operating system, such as iOS®, ANDROID®, MSDOS®, MS-WINDOWS®, OS / 2®, UNIX®, UNIX®, LINUX® or another known operating system . In other cases, the I / O 845 controller can represent or interact with a modem, keyboard, mouse, touchscreen or similar device. In some cases, the I / O controller 845 can be implemented as part of a processor. In some cases, a user can interact with the 805 device through the I / O 845 controller or through hardware components controlled by the I / O 845 controller.
[0138] [0138] Figure 9 shows a block diagram 900 of a wireless device 905 that supports downlink position reference signals in multi-beam systems, in accordance with aspects of the present disclosure. The wireless device 905 can be an example of aspects of a base station 105, as described herein. The wireless device 905 can include the receiver 910, the communications manager of the base station 915, and the transmitter 920. The wireless device 905 can also include a processor. Each of these components can be in communication with each other (for example, through one or more buses).
[0139] [0139] The 910 receiver can receive information, such as packets, user data or control information associated with various information channels (such as, for example, control channels, data channels and information related to the positioning reference signal). downlink in multi-beam systems, etc.). The information can be passed on to other components of the device. The receiver 910 can be an example of aspects of the transceiver 1235 described with reference to Figure 12. The receiver 910 can use a single antenna or a set of antennas.
[0140] [0140] The communications manager of the base station 915 can be an example of aspects of the communications manager of the base station 1215 described with reference to Figure 12.
[0141] [0141] The communications manager of the base station 915 and / or at least some of its various subcomponents can be implemented in hardware,
[0142] [0142] The communications manager of the base station 915 can identify an almost
[0143] [0143] The 920 transmitter can transmit signals generated by other components of the device. In some examples, transmitter 920 may be placed with a receiver 910 within a transceiver module. For example, transmitter 920 can be an example of aspects of transceiver 1235 described with reference to Figure 12. Transmitter 920 can use a single antenna or a set of antennas.
[0144] [0144] Figure 10 shows a block diagram 1000 of a wireless device 1005 that supports downlink position reference signals in multi-beam systems, in accordance with aspects of the present disclosure. Wireless device 1005 can be an example of aspects of a wireless device 905 or base station 105, as described with reference to Figure 9. Wireless device 1005 can include receiver 1010, the communications manager of the base station 1015 and transmitter 1020. The wireless device 1005 can also include a processor. Each of these components can be in communication with each other (for example, through one or more buses).
[0145] [0145] The 1010 receiver can receive information, such as packages, user data or control information associated with various information channels (such as, for example, control channels, data channels and information related to the positioning reference signal). downlink in multi-beam systems, etc.). The information can be passed on to other components of the device. The receiver 1010 can be an example of aspects of the transceiver 1235 described with reference to Figure 12. The receiver 1010 can use a single antenna or a set of antennas.
[0146] [0146] The communications manager of the base station 1015 can be an example of aspects of the communications manager of the base station 1215, described with reference to Figure 12.
[0147] [0147] The communications manager of the base station 1015 can also include the QCL 1025 component and the Indicator Component 1030. The QCL 1025 component can identify an almost co-location relationship that indicates that the base station's antenna ports used to transmit a sync signal are almost co-located with the base station's antenna ports used to transmit a positioning reference signal. Indicator Component 1030 can transmit an indication of the near-co-location ratio and transmit a reference signal, where the identified near-co-location ratio further indicates that the base station's antenna ports used to transmit the reference signal are almost co-located with base station antenna ports used to transmit the positioning reference signal. In some cases, transmitting the indication of the near co-location relationship includes transmitting a transmission of system information that includes the indication of the near co-location relationship, the transmission of system information that includes a SIB, or an ISMS, or an OSIB, or a combination of them. In some cases, the transmitted reference signal includes a DMRS PBCH, or a CSI-RS, or a combination of them. In some instances, the quasi-co-location relationship comprises a Doppler shift, or a Doppler spread, or a mean delay, or a spread delay, or one or more spatial parameters, or a combination of them.
[0148] [0148] The 1020 transmitter can transmit signals generated by other components of the device. In some examples, transmitter 1020 may be placed with a receiver 1010 within a transceiver module. For example, transmitter 1020 can be an example of aspects of transceiver 1235 described with reference to Figure 12. Transmitter 1020 can use a single antenna or a set of antennas.
[0149] [0149] Figure 11 shows a block diagram 1100 of a base station communications manager 1115 that supports downlink position reference signals in multi-beam systems, in accordance with aspects of the present disclosure. The communications manager of the base station 1115 can be an example of aspects of a communications manager of the base station 1215 described with reference to Figures 9, 10 and 12. The communications manager of the base station 1115 may include the component QCL 1120, the reference signal component 1125, Indicator Component 1135 and cell identifier component 1130. Each of these modules can communicate, directly or indirectly, with each other (for example, through one or more buses).
[0150] [0150] The QCL 1120 component can identify an almost co-location relationship that indicates that the base station's antenna ports used to transmit a synchronization signal are almost co-located with the base station's antenna ports used to transmit a positioning reference signal. In some instances, the quasi-co-location relationship comprises a Doppler shift, or a Doppler spread, or a mean delay, or a spread delay, or one or more spatial parameters, or a combination of them.
[0151] [0151] Indicator Component 1135 can transmit an indication of the near-co-location ratio and transmit a reference signal, where the identified near-co-location ratio further indicates that the base station's antenna ports used to transmit the reference points are almost co-located with base station antenna ports used to transmit the positioning reference signal. In some cases, transmitting the indication of the quasi-placement relationship includes transmitting a transmission of system information that includes indication of the quasi-location relationship, the transmission of system information, which includes a SIB, or an ISMS or a OSIB or a combination of them. In some cases, the transmitted reference signal includes a DMRS PBCH, or a CSI-RS, or a combination of them.
[0152] [0152] The reference signal component 1125 can transmit the reference signal and the positioning reference signal based on the transmitted indication of the quasi-co-location relationship. A synchronization signal can be an example of a reference signal. In some examples, the reference signal may comprise a synchronization signal, or a CSI-RS for tracking, or a CSI-RS for beam management, or a CSI-RS for radio resource management, or a DMRS PBCH or a CSI-RS, or a combination of them. In some cases, the sync signal includes a PSS, or SSS, or a combination of them.
[0153] [0153] The cell identifier component 1130 can transmit a set of cell identifiers to cells that transmit positioning reference signals. In some cases, the transmission of the set of cell identifiers to the cells that transmit the positioning reference signals includes the transmission of an RRC message, or system information, or a DCI, or a positioning protocol message, or information system, or a combination of them, that indicate a set of cell identifiers.
[0154] [0154] Figure 12 shows a diagram of a 1200 system that includes a 1205 device that supports downlink position reference signals in multi-beam systems, in accordance with aspects of the present disclosure. Device 1205 can be an example or include components of base station 105, as described above, for example, with reference to Figure 1. Device 1205 can include components for bidirectional voice and data communication, which includes components for transmission and reception communications, which include the communications manager of the base station 1215, the processor 1220, the memory 1225, the software 1230, the transceiver 1235, the antenna 1240, the network communications manager 1245, and the communications manager between stations 1250 These components can be in electronic communication through one or more buses (such as, for example, bus 1210). The 1205 device can communicate wirelessly with one or more 115 UEs.
[0155] [0155] The 1220 processor can include an intelligent hardware device (such as a general purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete port component or transistor logic, discrete hardware components, or any combination of them). In some cases, the 1220 processor can be configured to operate a memory array using a memory controller. In other cases, a memory controller can be integrated into the processor
[0156] [0156] The 1225 memory can include RAM and ROM. Memory 1225 can store software executable by computer, readable by computer 1230, which includes instructions that, when executed, cause the processor to perform the various functions described here. In some cases, memory 1225 may contain, among other things, a BIOS that can control basic hardware or software operation, such as interaction with peripheral components or devices.
[0157] [0157] The 1230 software may include code to implement aspects of the present disclosure, which includes code to support the downlink position reference signal in multi-beam systems. The 1230 software can be stored on a medium readable by a non-transitory computer, such as system memory or other memory. In some cases, the 1230 software may not be directly executable by the processor, but it can cause a computer (such as, when compiled and run) to perform the functions described here.
[0158] [0158] The 1235 transceiver can communicate bidirectionally through one or more antennas, wireless or wired links, as described above. For example, transceiver 1235 can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. The 1235 transceiver may also include a modem to modulate the packets and supply the modulated packets to the antennas for transmission and to demodulate the packets received from the antennas.
[0159] [0159] In some cases, the wireless device may include a single 1240 antenna. However, in some cases, the device may have more than one 1240 antenna, which may be capable of simultaneously transmitting or receiving multiple wireless transmissions.
[0160] [0160] The network communications manager 1245 can manage communications with the main network (for example, through one or more wired return transport links). For example, the network communications manager 1245 can manage the transfer of data communications to client devices, such as one or more UEs 115.
[0161] [0161] The inter-station communications manager 1250 can manage communications with another base station 105 and can include a controller or programmer to control communications with UEs 115 in cooperation with other base stations 105. For example, the inter-station communications manager 1250 can coordinate scheduling for transmissions to UEs 115 for various interference mitigation techniques, such as beam formation or joint transmission. In some examples, the inter-station communications manager 1250 may provide an X2 interface within Long Term Evolution (LTE) / LTE-A wireless communication technology to provide communication between base stations
[0162] [0162] Figure 13 shows a flowchart showing a 1300 method for reference signal of downlink positioning in multi-beam systems, according to aspects of the present disclosure. The method 1300 operations can be implemented by a UE 115 or its components, as described here. For example, method 1300 operations can be performed by an UE communications manager, as described with reference to Figures 5 through 8. In some examples, an UE 115 can execute a set of codes to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the UE 115 can perform aspects of the functions described below using special-purpose hardware.
[0163] [0163] In block 1305, UE 115 can identify an almost co-location relationship that indicates that one or more antenna ports of a base station used to transmit a reference signal are almost co-located with one or more base station antenna used to transmit a positioning reference signal. Block 1305 operations can be carried out according to the methods described here. In certain examples, aspects of block 1305 operations can be performed by a QCL component, as described with reference to Figures 5 through 8.
[0164] [0164] In block 1310, the UE 115 can receive the reference signal in the UE. Block 1310 operations can be carried out according to the methods described here. In certain examples, aspects of the operations of block 1310 can be performed by a reference signal component, as described with reference to Figures 5 to 8.
[0165] [0165] In block 1315, the UE 115 can determine a receiving beam for the UE to use to receive the positioning reference signal based, at least in part, on the received reference signal and the almost co-relation. identified location. The operations of block 1315 can be carried out according to the methods described here. In certain examples, aspects of the operations of block 1315 can be performed by a beam determining component, as described with reference to Figures 5 to 8.
[0166] [0166] In block 1320, the UE 115 can receive a positioning reference signal in the UE using the determined receiving beam. Block 1320 operations can be performed according to the methods described here. In certain examples, aspects of block 1320 operations can be performed by a PRS component, as described with reference to Figures 5 to 8.
[0167] [0167] Figure 14 shows a flow chart showing a 1400 method for downlink positioning reference signal in multi-beam systems, according to aspects of the present disclosure. The method 1400 operations can be implemented by a UE 115 or its components, as described herein. For example, method 1400 operations can be performed by an UE communications manager, as described with reference to Figures 5 through 8. In some examples, an UE 115 can execute a set of codes to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the UE 115 can perform aspects of the functions described below using special-purpose hardware.
[0168] [0168] In block 1405, the UE 115 can identify an almost co-location relationship that indicates that one or more antenna ports of a base station used to transmit a reference signal are almost co-located with one or more communication ports. base station antenna used to transmit a positioning reference signal. Block 1405 operations can be performed according to the methods described here. In certain examples, aspects of block 1405 operations can be performed by a QCL component, as described with reference to Figures 5 through 8.
[0169] [0169] In block 1410, the UE 115 can receive the reference signal in the UE. Block 1410 operations can be performed according to the methods described here. In certain examples, aspects of the operations of block 1410 may be performed by a reference signal component, as described with reference to Figures 5 to 8.
[0170] [0170] In block 1415, the UE 115 can determine a receiving beam for the UE to use to receive the positioning reference signal based, at least in part, on the received reference signal and the almost co-relation. identified location. Block 1415 operations can be carried out according to the methods described here. In certain examples, aspects of the operations of block 1415 can be performed by a beam determining component, as described with reference to Figures 5 to 8.
[0171] [0171] In block 1420, the UE 115 can receive a positioning reference signal in the UE using the determined receiving beam. The operations of block 1420 can be carried out according to the methods described here. In certain examples, aspects of the operations of block 1420 can be performed by a PRS component, as described with reference to Figures 5 to 8.
[0172] [0172] In block 1425, the UE 115 can receive an indication of the near co-location relationship from the base station. Block 1425 operations can be carried out according to the methods described here. In certain examples, aspects of operations in block 1425 may be performed by a QCL component, as described with reference to Figures 5 through 8.
[0173] [0173] Figure 15 shows a flow chart showing a 1500 method for downlink position reference signal in multi-beam systems, according to aspects of the present disclosure. Method 1500 operations can be implemented by a base station 105 or its components, as described herein. For example, method 1500 operations can be performed by a base station communications manager, as described with reference to Figures 9 through 12. In some examples, a base station 105 can execute a set of codes to control functional elements device to perform the functions described below. In addition or alternatively, the base station 105 can perform aspects of the functions described below using special purpose hardware.
[0174] [0174] In block 1505, base station 105 can identify an almost co-location relationship that indicates that one or more antenna ports of the base station used to transmit a reference signal are almost co-located with one or more base station antenna used to transmit a positioning reference signal. Block 1505 operations can be carried out according to the methods described here. In certain examples, aspects of the block 1505 operations can be performed by a QCL component, as described with reference to Figures 9 to 12.
[0175] [0175] In block 1510, base station 105 can transmit an indication of the almost co-location relationship. The operations of block 1510 can be carried out according to the methods described here. In certain examples, aspects of block 1510 operations can be performed by a QCL component, as described with reference to Figures 9 to 12.
[0176] [0176] Figure 16 shows a flow chart showing a 1600 method for reference signal of downlink positioning in multi-beam systems, according to aspects of the present disclosure. The 1600 method operations can be implemented by a base station 105 or its components, as described herein. For example, operations of method 1600 can be performed by a communications manager of the base station, as described with reference to Figures 9 to 12. In some examples, a base station 105 can execute a set of codes to control the functional elements device to perform the functions described below. In addition or alternatively, the base station 105 can perform aspects of the functions described below using special purpose hardware.
[0177] [0177] In block 1605, base station 105 can identify an almost co-location relationship that indicates that one or more antenna ports of the base station used to transmit a reference signal are almost co-located with one or more base station antenna used to transmit a positioning reference signal. Block 1605 operations can be performed according to the methods described here. In certain examples, aspects of the 1605 block operations can be performed by a QCL component, as described with reference to Figures 9 to 12.
[0178] [0178] In block 1610, base station 105 can transmit an indication of the almost co-location relationship. The operations of block 1610 can be carried out according to the methods described here. In certain examples, aspects of operations in block 1610 may be performed by a QCL component, as described with reference to Figures 9 to 12.
[0179] [0179] In block 1615, base station 105 can transmit a set of cell identifiers to cells that transmit positioning reference signals. The operations of block 1615 can be carried out according to the methods described here. In certain examples, aspects of operations in block 1615 can be performed by a cell identifier component, as described with reference to Figures 9 to
[0180] [0180] It should be noted that the methods described above describe possible implementations and that the operations and steps can be rearranged or otherwise modified and that other implementations are possible. In addition, aspects from two or more of the methods can be combined.
[0181] [0181] The techniques described here can be used for various wireless communication systems,
[0182] [0182] An OFDMA system can implement radio technology, such as Ultra Mobile Broadband (UMB), UTRA Evolved (E-UTRA), IEEE 802.11 (WiFi), IEEE
[0183] [0183] A macro-cell generally covers a relatively large geographical area (such as a radius of many kilometers) and can allow unrestricted access by UEs 115 with service subscriptions with the network provider. A small cell can be associated with a lower power base station 105 compared to a macro cell, and a small cell can operate in the same frequency band or in different frequency bands (such as licensed, unlicensed, etc. .). Small cells can include pico-cells, femto-cells and micro-cells, according to several examples. A peak cell, for example, can cover a smaller geographical area and can allow unrestricted access by UEs 115 with service subscriptions from the network provider. A femto-cell can also cover a smaller geographical area (a residence, for example) and can provide restricted access by UEs that have an association with femto-cell (such as UEs 115 in a closed group of subscribers (CSG) , UEs 115 for home users and the like). An eNB for a macro cell can be referred to as a macro-eNB. An eNB for a small cell can be referred to as a small cell eNB, a pico-eNB, a femto-eNB or a native eNB. An eNB can support one or multiple (such as two, three, four and the like) cells, and can support communications that use one or multiple component carriers.
[0184] [0184] The wireless communication system 100 or systems described herein can support synchronous or asynchronous operation. For synchronous operation, base station 105 may have similar frame timing and transmissions from different base stations may be approximately time aligned. For asynchronous operation, base station 105 may have different frame timing and transmissions from different base stations may not be time aligned. The techniques described here can be used for synchronous or asynchronous operation.
[0185] [0185] The information and signals described here can be represented using any of several different 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 particles, optical fields or particles, or any combination of them.
[0186] [0186] The various blocks and illustrative logic modules described in connection with the present disclosure, can be implemented or carried out with a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable port arrangement (FPGA) or other programmable logic device (PLD), discrete port or transistor logic, discrete hardware components or any combination of them designed to perform the functions described here. A general purpose processor can be a microprocessor, but alternatively, the processor can be any conventional processor, controller, micro-controller or state machine. A processor can also be implemented as a combination of computing devices (such as, for example, a combination of a DSP and microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core or any other configuration).
[0187] [0187] The functions described here can be implemented in hardware, software executed by a processor, firmware or any combination of them. If implemented in software executed by a processor, the functions can be stored in or transmitted through one or more instructions or code in a medium that can be read by a computer. Other examples and implementations are within the scope and appended claims. For example, due to the nature of software, the functions described above can be implemented using software executed by a processor, hardware, firmware, hardwiring or combinations of any of them. Resources that implement functions can also be physically located in different positions, including being distributed in such a way that parts of functions are implemented in different physical locations.
[0188] [0188] Computer-readable medium includes both non-transitory computer storage medium and communication medium which includes any medium that facilitates the transfer of a computer program from one place to another. A non-transitory storage medium can be any available medium that can be accessed by a general purpose or special purpose computer.
[0189] [0189] As used herein, including in the claims, “or” as used in a list of items (such as, for example, a list of items prefaced by a phrase such as “at least one of” or “one or more of ”) Indicates an inclusive list such 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 (that is, A and B and C) . In addition, as used herein, the phrase "based on" should not be interpreted as a reference to a closed set of conditions. For example, an exemplary step that is described as "based on condition A" can be based on either condition A or condition B without abandoning the scope of the present disclosure. In other words, as used herein, the phrase "based on" will be interpreted in the same way as the phrase "based at least in part on".
[0190] [0190] In the attached figures, components or similar resources may have the same reference label. In addition, several components of the same type can be distinguished by following the reference label by a dashed line and a second label that is distinguished from similar components. If only the first reference label is used in the specification, the description applies to any of the similar components that have the same first reference label, regardless of the second reference label or other subsequent reference label.
[0191] [0191] The description established here, in connection with the attached drawings, describes exemplary configurations and does not represent all examples that can be implemented or that are within the scope of the claims. The term “exemplary” used here means “that serves as an example, instance or illustration”, and not “preferred” or “advantageous over other examples”. The detailed description includes specific details for the purpose of providing an understanding of the techniques described. These techniques, however, can be practiced without these specific details. In some instances, well-known structures and devices are shown in the form of a block diagram in order to avoid obscuring the concepts of the examples described.
[0192] [0192] The description here is provided to allow a person skilled in the art to manufacture or use the disclosure. Various changes in the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other variations without abandoning the scope of the disclosure. Thus, the disclosure should not be limited to the examples and drawings described here, but should receive the widest range compatible with the unpublished principles and resources disclosed here.

权利要求:
Claims (30)
[1]
1. A method for wireless communication on user equipment (UE), which comprises: identifying a nearly co-location relationship that indicates that one or more antenna ports of a base station used to transmit a reference signal are almost co -located with one or more base station antenna ports used to transmit a positioning reference signal; receive the reference signal in the UE; determining a receiving beam for the UE to use to receive the positioning reference signal based, at least in part, on the received reference signal and the identified co-location ratio; and receiving a positioning reference signal at the UE using the determined receiving beam.
[2]
A method according to claim 1, wherein determining the receiving beam for the UE to use it to receive the positioning reference signal comprises: measuring a signal strength of the reference signal; and the method further comprises identifying the receiving beam based, at least in part, on the strength of the measured signal and on the identified co-location ratio.
[3]
A method according to claim 1, which further comprises: receiving, from the base station, system information which includes an indication of the quasi-co-location relationship.
[4]
4. Method according to claim 1, in which the almost co-location relationship is pre-configured.
[5]
A method according to claim 1, which further comprises: receiving a set of cell identifiers for cells that transmit positioning reference signals; and monitoring by positioning reference signals from one or more of the cells based, at least in part, on the received set of cell identifiers.
[6]
6. The method of claim 5, wherein receiving the set of cell identifiers for the cells that transmit the positioning reference signals comprises: receiving a radio resource control (RRC) message, or system information , or a downlink control information (DCI), or a positioning protocol message, or a combination of them that indicates the set of cell identifiers.
[7]
A method according to claim 1, which further comprises: receiving, in the UE, a second reference signal from a second cell and a third reference signal; determining a second receiving beam and a third receiving beam for the UE to use to receive positioning reference signals;
receiving a second positioning reference signal using the second determined receiving beam and a third positioning reference signal using the third determined receiving beam; and determining a position of the UE based, at least in part, on the received position reference signal, on the second received position reference signal and on the third received position reference signal.
[8]
A method according to claim 1, wherein the reference signal comprises a synchronization signal or a channel state indication reference signal (CSI-RS) for tracking, or a CSI-RS for beam management or a CSI-RS for radio resource management, or a demodulation reference signal (DMRS) from the physical broadcast channel (PBCH) or a combination of them.
[9]
A method according to claim 8, wherein the reference signal is a synchronization signal comprising a primary synchronization signal (PSS) or a secondary synchronization signal (SSS), or a combination of them.
[10]
A method according to claim 1, wherein the quasi-co-location relationship comprises a Doppler shift, or a Doppler spread, or a mean delay, or a spread delay, or one or more spatial parameters, or a combination of them.
[11]
11. Method for wireless communication at a base station, comprising:
identify an almost co-location relationship that indicates that one or more base station antenna ports used to transmit a reference signal are almost co-located with one or more base station antenna ports used to transmit a reference signal positioning; and transmitting an indication of the quasi-co-location relationship.
[12]
A method according to claim 11, which further comprises: transmitting the reference signal and the positioning reference signal based, at least in part, on the transmitted indication of the quasi-co-location relationship.
[13]
13. The method of claim 11, wherein the reference signal comprises a synchronization signal or a channel state indication reference signal (CSI-RS) for tracking or a CSI-RS for beam management or a CSI-RS for radio resource management or a demodulation reference signal (DMRS) from the physical broadcast channel (PBCH) or a combination of them.
[14]
A method according to claim 13, wherein the reference signal is a synchronization signal comprising a primary synchronization signal (PSS) or a secondary synchronization signal (SSS), or a combination thereof.
[15]
A method according to claim 11, wherein transmitting the indication of the quasi-co-location relationship comprises:
transmit a system information that includes the indication of the almost co-location relationship.
[16]
A method according to claim 11, which further comprises: transmitting a set of cell identifiers to cells that transmit positioning reference signals.
[17]
17. The method of claim 16, wherein transmitting the set of cell identifiers to the cells that transmit the positioning reference signals comprises: transmitting a radio resource control (RRC) message, or information of downlink control (DCI), or a positioning protocol message, or a combination of them that indicates the set of cell identifiers.
[18]
18. The method of claim 17, wherein the quasi-co-location relationship comprises a Doppler shift, or a Doppler spread, or a mean delay, or a spread delay, or one or more spatial parameters, or a combination of them.
[19]
19. Apparatus for wireless communication in a user equipment (UE), comprising: means for identifying a near-co-location relationship that indicates that one or more antenna ports of a base station used to transmit a reference signal are almost co-located with one or more base station antenna ports used to transmit a positioning reference signal; means for receiving the reference signal in the UE;
means for determining a receiving beam for the UE to use to receive the positioning reference signal based, at least in part, on the received reference signal and the identified co-location ratio; and means for receiving a positioning reference signal at the UE using the determined receiving beam.
[20]
An apparatus according to claim 19, wherein: the means for determining the receiving beam for the UE to use it to receive the positioning reference signal comprises means for measuring a signal strength of the reference signal; and the apparatus further comprises means for identifying the receiving beam based, at least in part, on the measured signal strength and on the identified co-location ratio.
[21]
21. Apparatus according to claim 19, further comprising: means for receiving, from the base station, system information including an indication of the quasi-co-location relationship.
[22]
22. Apparatus according to claim 19, in which the almost co-location relationship is pre-configured.
[23]
An apparatus according to claim 19, further comprising: means for receiving a set of cell identifiers for cells that transmit positioning reference signals; and means for monitoring by positioning reference signals from one or more of the cells based, at least in part, on the received set of cell identifiers.
[24]
An apparatus according to claim 19, further comprising: means for receiving, in the UE, a second reference signal from a second cell and a third reference signal from a third cell; means for determining a second receiving beam and a third receiving beam for the UE to use to receive positioning reference signals; means for receiving a second positioning reference signal using the second determined receiving beam and a third positioning reference signal using the third determined receiving beam; and means for determining a position of the UE based, at least in part, on the received position reference signal, on the second received position reference signal, and on the third received position reference signal.
[25]
25. Apparatus according to claim 19, wherein the reference signal comprises a synchronization signal, or a reference indication signal on channel state (CSI-RS) for tracking, or a CSI-RS for managing beams or a CSI-RS for radio resource management, or a demodulation reference signal (DMRS) from the physical broadcast channel (PBCH)
or a combination of them.
[26]
26. An apparatus for wireless communication at a base station, comprising: means for identifying an almost co-location relationship that indicates that one or more antenna ports of the base station used to transmit a reference signal are almost co-located with one or more base station antenna ports used to transmit a positioning reference signal; and means for transmitting an indication of the quasi-co-location relationship.
[27]
An apparatus according to claim 26, further comprising: means for transmitting the reference signal and the positioning reference signal based, at least in part, on the transmitted indication of the quasi-co-location ratio.
[28]
An apparatus according to claim 26, in which transmitting the indication of the near-co-location relationship comprises: transmitting a system information which includes the indication of the near-co-location relationship.
[29]
An apparatus according to claim 26, further comprising: means for transmitting a set of cell identifiers to cells that transmit positioning reference signals.
[30]
Apparatus according to claim 26, wherein the reference signal comprises a synchronization signal, or a channel state indication reference signal (CSI-RS) for tracking, or a CSI-RS for managing beam, or a CSI-RS for radio resource management, or a demodulation reference signal (DMRS) from the physical broadcast channel (PBCH) or a combination of them.

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同族专利:

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公开号 | 公开日

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AU2018311670A1|2020-01-16|

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WO2019027680A2|2019-02-07|

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CA3067622A1|2019-02-07|

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CN110999434A|2020-04-10|

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US11233612B2|2022-01-25|

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WO2019027680A3|2020-02-13|

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US20190044677A1|2019-02-07|

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EP3662705B1|2021-10-20|

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KR20200029498A|2020-03-18|

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EP3662705A2|2020-06-10|

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