MULTI CARRIER ASYNCHRO COMMUNICATIONS

专利摘要:
asynchronous multi-carrier communications. Apparatus and methods for performing asynchronous multi-carrier communications are provided. such method involves generating, in a first wireless device, a waveform that includes one or more carriers, shaping the waveform to reduce interference between the waveform and adjacent waveforms, and transmitting, in a spectrum, of the asynchronously modeled waveform.
公开号:BR112016027966A2
申请号:R112016027966-2
申请日:2015-05-12
公开日:2021-09-08
发明作者:Joseph Binamira Soriaga；Tingfang JI；John Edward Smee；Naga Bhushan；Peter Gaal；Krishna Kiran Mukkavilli；Alexei Yurievitch Gorokhov
申请人:Qualcomm Incorporated；
IPC主号:

专利说明:

[0001] [0001] This application claims priority to, and the benefit of, United States Provisional Application No. 62/004,337, filed May 29, 2014, and United States Non-Provisional Application No. 14/574,149, filed December 17, 2014 , the entire contents of which are incorporated herein by reference as if set out in full below and for all applicable purposes. TECHNICAL FIELD
[0002] [0002] Aspects of the present disclosure relate generally to wireless communication systems, and more specifically, to asynchronous multi-carrier communications. BACKGROUND
[0003] [0003] Wireless communication networks are widely implemented to provide various communication services such as telephony, video, data, messaging, broadcasting, and so on. Such networks, which are typically multiple access networks, support communications for multiple users by sharing available network resources.
[0004] [0004] As the demand for mobile broadband access continues to increase, research and development continues to improve wireless communication technologies not only to meet the growing demand for mobile broadband access, but to advance and improve the user experience.
[0005] [0005] Synchronous communications are commonly used within wireless communication networks. However, there are some disadvantages involved with using such synchronous communications. BRIEF SUMMARY OF SOME EXAMPLES
[0006] [0006] The following presents a simplified summary of one or more aspects of the present disclosure, to provide a basic understanding of such aspects. This summary is not an extensive overview of all considered features of the revelation, and is not intended to identify essential elements of all aspects of the revelation or to outline the scope of any or all aspects of the revelation. Its sole purpose is to present some concepts of one or more aspects of revelation in a simplified form as a prelude to the more detailed description that is presented later.
[0007] [0007] One or more aspects of the present disclosure provide for enabling multi-carrier asynchronous communications. For example, in one aspect at a communication link level, waveform modeling methods to reduce cross-carrier interference between links help to enable asynchronous multi-carrier communications. Such a waveform modeling method of wireless communication involves generating, in a first wireless device, a waveform that includes one or more carriers, shaping the waveform to reduce interference between the waveform and adjacent waveforms, and the transmission, in a spectrum, of the asynchronously modeled waveform.
[0008] [0008] Another aspect involves a wireless communication device that includes means for generating, in a first wireless device, a waveform that includes one or more carriers, means for shaping the waveform to reduce interference between the waveform and adjacent waveforms, and means for transmitting, in a spectrum, the asynchronously modeled waveform.
[0009] [0009] Another aspect involves a wireless communication device that includes at least one processor, a memory communicatively coupled with the at least one processor, and a communication interface communicatively coupled with at least one processor, where the at least at least one processor is configured to generate, in a first wireless device, a waveform that includes one or more carriers, shape the waveform to reduce interference between the waveform and adjacent waveforms, and transmission, in a spectrum, of the asynchronously modeled waveform.
[0010] [0010] Another aspect involves a non-transient computer-readable medium storing computer-executable code, including code for generating, in a first wireless device, a waveform that includes one or more carriers, shaping the waveform to reduce interference between the waveform and adjacent waveforms, and transmit, in a spectrum, the modeled waveform asynchronously.
[0011] [0011] Another aspect involves a method of wireless communication that includes receiving, in a first wireless device, a signal through asynchronous communications in a spectrum; filter the received signal to reduce interference from other asynchronous communications in the spectrum, and recover user data from the filtered signal.
[0012] [0012] Another aspect involves a wireless communication device that includes means for receiving, in a first wireless device, a signal via asynchronous communications on a spectrum, means for filtering the received signal to reduce interference from other communications spectrum, and means for retrieving user data from the filtered signal.
[0013] [0013] Another aspect involves a wireless communication device that includes at least one processor, a memory communicatively coupled to the at least one processor, and a communication interface communicatively coupled to at least one processor, where the at least a processor is configured to receive, in a first wireless device, a signal via asynchronous communications on a spectrum; filter the received signal to reduce interference from other asynchronous communications in the spectrum, and recover user data from the filtered signal.
[0014] [0014] Another aspect involves a non-transient computer-readable medium storing computer-executable code, including code for receiving, in a first wireless device, a signal via asynchronous communications on a spectrum; filter the received signal to reduce interference from other asynchronous communications in the spectrum, and recover user data from the filtered signal.
[0015] [0015] The waveform model to transmit the data may also involve structures and methods to perform orthogonal frequency division multiple access modulation (OFDMA) with weighted addition and overlap filtering (WOLA). In another aspect the waveform model may involve structures and methods for performing multi-carrier frequency domain (FDE) equalization.
[0016] [0016] At the network planning level, one aspect of the present disclosure involves frameworks and methods for allowing the coexistence of both asynchronous and synchronous communications. Such structures and methods may involve provisioning between asynchronous and synchronous communications and provisioning bandwidth for collision handling.
[0017] [0017] Such an aspect involves a method of wireless communication that includes providing a pre-selected bandwidth for communications on a wireless network, provisioning a first portion of the pre-selected bandwidth for synchronous communications on the wireless network, and provisioning, based on a demand for traffic on the wireless network, a second portion of the pre-selected bandwidth for asynchronous communications on the wireless network.
[0018] [0018] Another such aspect involves a wireless communication device, including means for providing a preselected bandwidth for communications on a wireless network, means for provisioning a first portion of the preselected bandwidth for synchronous communications in the wireless network, and means for provisioning, based on a demand for traffic on the wireless network, a second portion of pre-selected bandwidth for asynchronous communications on the wireless network.
[0019] [0019] Another aspect involves a wireless communication device that includes at least one processor, a memory communicatively coupled with at least one processor, and a communication interface communicatively coupled with the at least one processor, where the at least least one processor is configured to provide preselected bandwidth for communications on a wireless network, provision a first portion of the preselected bandwidth for synchronous communications on the wireless network, and provision based on a traffic demand on the wireless network, a second portion of the bandwidth preselected for asynchronous communications on the wireless network.
[0020] [0020] Another such aspect involves a non-transient computer-readable medium storing computer-executable code, including code to provide pre-selected bandwidth for communications on a wireless network, provision a first portion of the pre-selected bandwidth for synchronous communications on the wireless network, and provision, based on a demand for traffic on the wireless network, a second portion of the pre-selected bandwidth for asynchronous communications on the wireless network.
[0021] [0021] These and other aspects of the method and apparatus will become better understood from a review of the detailed description below. Other aspects, features and embodiments of the present method and apparatus will become apparent to those of ordinary skill in the art upon review of the following description of specific embodiments, exemplars of the present method and apparatus in conjunction with the accompanying figures. While features of the present method and apparatus may be discussed in relation to certain embodiments and figures below, all embodiments of the present method and apparatus may include one or more of the advantageous aspects discussed herein. In other words, while one or more embodiments may be discussed as having certain advantageous features, one or more of such features may also be used in accordance with the various embodiments of the method and apparatus discussed herein. Similarly, while exemplary embodiments may be discussed below as device, system, or method embodiments, it should be understood that such exemplary embodiments may be implemented in various devices, systems, and methods. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] [0022] Figure 1 is a diagram illustrating an example of a hardware implementation for a device employing a processing system.
[0023] [0023] Figure 2 is a diagram illustrating an example of a network architecture.
[0024] [0024] Figure 3 is a diagram illustrating an example of an access network.
[0025] [0025] Figure 4 is a diagram illustrating an example of a synchronous uplink.
[0026] [0026] Figure 5 is a diagram illustrating an example of an asynchronous uplink according to some aspects of the disclosure.
[0027] [0027] Figure 6 is a diagram illustrating examples of various communication links.
[0028] [0028] Figure 7 is a diagram illustrating examples of cross-carrier interference (ICI) and a model approach to dealing with ICI and enabling asynchronous communication according to some aspects of the disclosure.
[0029] [0029] Figure 8 is a diagram illustrating an exemplary process for operating asynchronous communication enabled transmitter circuitry in accordance with some aspects of the disclosure.
[0030] [0030] Figure 9 is a diagram illustrating a simplified example of a hardware implementation for an apparatus employing processing circuitry and adapted to operate transmitter circuitry in accordance with some aspects of the disclosure.
[0031] [0031] Figure 10 is a diagram illustrating an exemplary process for operating asynchronous communication-enabled receiver circuitry in accordance with some aspects of the disclosure.
[0032] [0032] Figure 11 is a diagram illustrating a simplified example of a hardware implementation for an apparatus employing processing circuitry and adapted to operate receiver circuitry in accordance with some aspects of the disclosure.
[0033] [0033] Figure 12 is a diagram illustrating an example transmitter circuitry to enable asynchronous communication using orthogonal frequency division multiple access modulation (OFDMA) with weighted addition and overlap filtering (WOLA) in accordance with some aspects of the revelation.
[0034] [0034] Figure 13 is a diagram illustrating an exemplary process for operating asynchronous communication-enabled transmitter circuitry using orthogonal frequency division multiple access modulation (OFDMA) with weighted addition and overlap filtering (WOLA) in accordance with with some aspects of the revelation.
[0035] [0035] Figure 14 is a diagram illustrating an example receiver circuitry to enable asynchronous communication using orthogonal frequency division multiple access modulation (OFDMA) with weighted addition and overlap filtering (WOLA) in accordance with some aspects of the revelation.
[0036] [0036] Figure 15 is a diagram illustrating an exemplary process for operating asynchronous communication-enabled receiver circuitry using orthogonal frequency division multiple access (OFDMA) modulation with weighted addition and overlap (WOLA) filtering in accordance with with some aspects of the revelation.
[0037] [0037] Figure 16 is a diagram illustrating an example transmitter circuitry to enable asynchronous communication using multi-carrier frequency domain equalization (FDE) in accordance with some aspects of the disclosure.
[0038] [0038] Figure 17 is a diagram illustrating an exemplary process for operating asynchronous communication enabled transmitter circuitry using multi-carrier frequency domain (FDE) equalization in accordance with some aspects of the disclosure.
[0039] [0039] Figure 18 is a diagram illustrating an example receiver circuitry to enable asynchronous communication using multi-carrier frequency domain (FDE) equalization in accordance with some aspects of the disclosure.
[0040] [0040] Figure 19 is a diagram illustrating an exemplary process for operating the receiver circuitry enabled for asynchronous communication using multi-carrier frequency domain (FDE) equalization in accordance with some aspects of the disclosure.
[0041] [0041] Figure 20 is a diagram illustrating two examples for bandwidth allocation for asynchronous communications in a wireless communication network in accordance with some aspects of the disclosure.
[0042] [0042] Figure 21 is a diagram illustrating an example for bandwidth allocation for synchronous and asynchronous communications using static or semi-static provisioning in a wireless communication network in accordance with some aspects of the disclosure.
[0043] [0043] Figure 22 is a diagram illustrating an example for bandwidth allocation for synchronous and asynchronous communications using thin provisioning in a wireless communication network in accordance with some aspects of the disclosure.
[0044] [0044] Figure 23 is a diagram illustrating examples for bandwidth allocation for asynchronous communications with symbol numerology optimized for various use cases in a wireless communication network in accordance with some aspects of the disclosure.
[0045] [0045] Figure 24 is a diagram illustrating an exemplary process for allocating bandwidth for asynchronous communications in a wireless communication network in accordance with some aspects of the disclosure.
[0046] [0046] Figure 25 is a diagram illustrating a simplified example of a hardware implementation for an apparatus employing a processing circuit and adapted to allocate bandwidth for asynchronous communications in a wireless communication network according to some aspects of the revelation.
[0047] [0047] Figure 26 is a schematic diagram illustrating a transmission windowing operation of a weighted addition and overlap (WOLA) filter in accordance with some aspects of the disclosure.
[0048] [0048] Figure 27 is a schematic diagram illustrating a receive windowing operation of a weighted addition and overlap (WOLA) filter in accordance with some aspects of the disclosure. DETAILED DESCRIPTION
[0049] [0049] The detailed description presented below in connection with the accompanying drawings is for the purpose of describing the various configurations and is not intended to represent the only configurations in which the concepts described herein may be practiced. The detailed description includes specific details for the purpose of providing a complete understanding of the various concepts. Yet,
[0050] [0050] Regarding synchronous communication, it may be adequate for link efficiency, but has associated costs. For example, at the receiver, synchronous communication may require the receiver to acquire, track, and correct timing before data can be received. At the transmitter, and after the receiver has had the timing set up, the transmitter may need tight and advanced coordination of additional timing across the entire operating bandwidth before data transfer can take place. As such, synchronous communication may not be ideal in certain applications, such as those applications that send data at relatively slow data rates.
[0051] [0051] Aspects of the present disclosure involve the establishment of asynchronous communication without as many requirements as in synchronous communication. More specifically, methods for enabling asynchronous communications are presented that involve transmitting and receiving a waveform model with waveform modeling that can sufficiently reduce interference between carriers to enable asynchronous communication. In some respects, the waveform transmission design involves the use of (1) orthogonal frequency division multiple access (OFDMA) modulation with overlap filtering and weighted addition (WOLA), (2) frequency domain equalization of multiple carriers (FDE), or (3) other suitable schemes to allow asynchronous communication. In some respects, the receive waveform model involves (1) orthogonal frequency division multiple access (OFDMA) modulation with overlap filtering and weighted addition (WOLA), (2) multi-carrier frequency domain equalization ( FDE), or (3) other suitable schemes to allow asynchronous communication.
[0052] [0052] Some aspects of the present disclosure also involve provisioning between synchronous and asynchronous communications and provisioning bandwidth to handle collisions. One such aspect involves providing a pre-selected bandwidth for communications on a wireless network, providing a first portion of the pre-selected bandwidth for synchronous communications on the wireless network, and provisioning, based on demand. traffic on the wireless network, a second portion of pre-selected bandwidth for asynchronous communications on the wireless network.
[0053] [0053] Various aspects of telecommunication systems will now be presented with reference to various apparatus and methods. The systems of Figures 1-3 are non-limiting examples of apparatus and methods in which the teachings described herein may find application and/or implementation. These devices and methods will be described in the detailed description that follows and illustrated in the attached drawings, using various blocks, modules, components, steps, circuits, processes, algorithms, etc. (collectively referred to as “elements”). These elements can be implemented using electronic hardware, computer software, or any combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and design limitations imposed on the system as a whole.
[0054] [0054] As an example, an element, or any portion of an element, or any combination of elements can be implemented with a “processing system”, which includes one or more processors.
[0055] [0055] Figure 1 is a conceptual diagram illustrating an example of a hardware implementation for an apparatus 100 that employs a processing system 114. In this example, the processing system 114 may be implemented with a bus architecture, generally shown by bus 102. Bus 102 may include any number of buses and communication bridges, depending on the specific application of processing system 114 and overall design constraints. Bus 102 interconnects various circuits, including one or more processors, generally represented by processor 104, and computer-readable media, generally represented by computer-readable media 106. Bus 102 may also connect various other circuits, such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art, and therefore will not be described further. A bus interface 108 provides an interface between the bus 102 and a transceiver 110. The transceiver 110 provides a means (eg, a transmitter and a receiver circuit) for communicating with various other apparatus via a transmission medium. Depending on the nature of the apparatus, a user interface 112 (eg keyboard, display, speaker, microphone, joystick) may also be provided.
[0056] [0056] Processor 104 is responsible for managing bus processing 102 and in general, including running software stored on computer readable medium 106. Software, when executed by processor 104, causes processing system 114 to execute the various functions described below for any specific device. Computer readable medium 106 may also be used to store data that is handled by processor 104 during software execution. Examples of processors 104 include microprocessors, microcontrollers, digital signal processors (DSPs), field programmable gate (FPGA) arrays, programmable logic devices (PLD), state machines, closed logic, discrete hardware circuits, and other suitable hardware. configured to perform the various functionalities described throughout this description. That is, processor 104, as used in an apparatus 100, may be used to implement any one or more of the processes described below.
[0057] [0057] In one aspect, the apparatus 100 may be a user equipment (UE), or a base station (BS). The base station may also be referred to by those skilled in the art as a base station transceiver (BTS), a radio base station, a radio transceiver, a transceiver function, a base service suite (BSS), a Extended Services (ESS), an access point (AP), a node B, an eNode B (eNB), the mesh node, relay, or some other appropriate terminology. A base station can provide wireless access points to a core network for any number of user equipment (UE). Examples of a UE include a cell phone, a smart phone, a session initiation protocol (SIP) phone, a laptop, a notebook, a netbook, a smartbook, a personal digital assistant (PDA), satellite radio, positioning device (GPS), a multimedia device, a video device, a digital audio player (e.g., an MP3 player), a camera, an entertainment device, a wearable communication device, an automobile, a mesh network, M2M component, a game console or any other similarly functioning device. The UE may also be referred to by those skilled in the art as a mobile station (MS), a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device , a wireless communications device of, a remote device, a mobile subscriber station, an access terminal (AT), a mobile terminal, a wireless terminal, a remote terminal, an apparatus, a terminal, an agent of user, a mobile client, a client, or some other appropriate terminology.
[0058] [0058] The various concepts presented throughout this disclosure can be implemented across a wide variety of telecommunications systems, network architectures, and communication standards. Wireless communication networks, such as those defined in accordance with the 3GPP standards for the evolved packet system (EPS),
[0059] [0059] Evolved versions of this network, such as a fifth generation (5G) network, can provide many different types of services or applications, including but not limited to web browsing, video streaming, VoIP, mission applications. , multi-hop networks, remote operations with real-time feedback (eg tele-surgery), etc.
[0060] [0060] Aspects of the present disclosure are not limited to a specific generation of wireless networks, but are generally addressed to wireless communication and specifically to 5G networks. However, to facilitate understanding of such aspects, with a known communication platform, examples of such LTE are presented in Figures 2-3.
[0061] [0061] Figure 2 is a diagram illustrating an LTE network architecture 200 employing various appliances 100 (see figure 1). The LTE network architecture 200 may be referred to as an Evolved Packet System (EPS) 200. The EPS 200 may include one or more User Equipment (UE) 202, an Evolved UMTS Terrestrial Radio Access Network UMTS (E-UTRAN) 204, an Evolved Packet Core (EPC) 210, a Home Subscriber Server (HSS) 220 and an Operator's IP Services
[0062] [0062] The E-UTRAN includes the evolved Node B (eNB) 206 and other eNB 208. The eNB 206 provides control plane and user protocol terminations to the UE 202. The eNB 206 can be connected to another eNB 208 via of an X2 Interface (i.e. return transport channel). The eNB 206 may also be referred to by those skilled in the art as a base station, a transceiver base station, a radio base station, a radio transceiver, a transceiver function, a base service set (BSS), a set of Extended Services (SEE), or some other appropriate terminology. The eNB 206 provides an access point to the EPC 210 for a UE 202. Examples of UEs 202 are described above. UE 202 may also be referred to by those skilled in the art using other terms as described above.
[0063] [0063] The eNB 206 is connected via an SI interface to the EPC 210. The EPC 210 includes a Mobility Management Entity (MME) 212, another MME 214, a Serving Gateway 216, and a Packet Data Network (PDN) Gateway 218. MME 212 is the control node that processes the signaling between the UE 202 and the EPC 210. Generally, the MME 212 provides connection and bearer management. All user IP packets are transferred through gateway server 216, which in turn is connected to gateway PDN 218. Gateway PDN 218 provides UE IP address assignment as well as other functions. The PDN Gateway 218 is connected to the IP Services of the Operator 222. The IP Services of the Operator 222 include the Internet, the Intranet, an IP Multimedia Subsystem (IMS), and a Streaming Service PS (PSS).
[0064] [0064] Figure 3 is a diagram illustrating an example of an access network of an LTE network architecture. In this example, the access network 300 is divided into a number of cellular regions (cells) 302. One or more lower power class eNBs 308, 312 may have overlapping cellular regions 310, 314, respectively, with one or more of the cells 302. The lower power class eNBs 308, 312 may be femto cells (eg, domestic eNBs (HeNBs)), pico cells, or micro cells. A higher power class eNB or macro 304 is assigned to a cell 302 and is configured to provide an access point to the EPC 210 for all UEs 306 in the cell
[0065] [0065] The modulation and multiple access scheme employed by the access network 300 may vary depending on the particular telecommunications standard being deployed. In LTE applications, OFDM is used in DL and SC-FDMA is used in UL to support both frequency division duplexing (FDD) and time division duplexing (TDD). As those skilled in the art will readily appreciate from the detailed description that follows, the various concepts presented here are well suited for LTE applications. However, these concepts can be easily extended to other telecommunications standards that employ modulation and other multiple access techniques. As an example, these concepts can be extended to Evolution-Data Optimized (EV-DO) or Ultra Mobile Broadband (UMB). EV-DO and UMB are air interface standards promulgated by the 3rd Generation Partnership Project 2 (3GPP2) as part of the CDMA2000 family of standards and employ
[0066] [0066] The eNB 304 can have multiple antennas that support MIMO technology. The use of MIMO technology allows the eNB 304 to exploit the spatial domain to support spatial multiplexing, beamforming, and transmission diversity.
[0067] [0067] Spatial multiplexing can be used to transmit different data streams simultaneously on the same frequency. Data vapors may be transmitted to a single UE 306 to increase the data rate or to multiple UEs 306 to increase overall system capacity. This is accomplished by spatially precoding each data stream (i.e., applying an amplitude and phase scaling) and then transmitting each precoded spatial stream through multiple transmit antennas on the link. downward. The spatially pre-encoded data streams arrive at the UE(s) 306 of different spatial signatures, which allows each of the UE(s) 306 to retrieve one or more data streams destined for that UE 306. On uplink, each UE 306 transmits a spatially pre-encoded data stream, which allows the eNB 304 to identify the source of each spatially pre-encoded data stream.
[0068] [0068] Spatial multiplexing is generally used when channel conditions are good. When channel conditions are less favorable, beamforming can be used to focus transmission energy in one or more directions. This can be achieved by spatially pre-coding the data for transmission through multiple antennas. To achieve good coverage at the edges of the cell, a single stream beamforming transmission can be used in combination with transmit diversity.
[0069] [0069] In the following detailed description, various aspects of an access network may involve a MIMO OFDM system supporting downlink. OFDM is a spread spectrum technique that modulates data over a number of subcarriers within an OFDM symbol. The subcarriers are spaced at precise frequencies. The spacing provides "orthogonality" that allows a receiver to retrieve data from the subcarriers. In the time domain, a guard interval (e.g. cyclic prefix) can be added to each OFDM symbol to combat interference between OFDM symbols. The uplink may utilize SC-FDMA in the form of an OFDM-DFT propagation signal to compensate for high peak-to-average power ratio (PARR). The cyclic prefix (CP) in LTE can be used to reduce intersymbol interference (ISI) and ensure orthogonality between UL signals. The cyclic prefix added to each OFDM symbol or each SC-FDM symbol can be used to combat inter-symbol interference (ISI) caused by delay dispersion on a multipath channel. A signal transmitted by a cell may reach a UE via multiple signal paths. Delay scatter is the difference between first and last copies of signal arriving at the UE. To effectively combat ISI, the length of the cyclic prefix can be selected to be equal to or greater than the expected delay spread so that the cyclic prefix contains a significant portion of all multipath energies. The cyclic prefix represents a fixed cost of samples for each OFDM or SC-FDM symbol.
[0070] [0070] Figure 4 is a diagram illustrating an example of a synchronous uplink. In one aspect, the uplink instance may be a legacy synchronous type that may be found in an LTE or other wireless network. Synchronous uplink 400 may be associated with communication between a user equipment (UE) 402 and a network node (e.g. base station)
[0071] [0071] As for synchronous communication, in general it can be good for link efficiency, but it has associated costs. For example, at the receiver, synchronous communication may require the receiver to acquire, control and timing correct before data can be received. At the transmitter, and after the receiver has had the timing set, the transmitter may need additional timing advance and tight coordination across the entire operational bandwidth before data transfer can take place. Likewise, synchronization between nodes can be beneficial for transmission and interference coordination, but it also has associated costs. At base stations, for example, synchronization between base stations can be achieved with macro and/or micro cells. However, some interior and small cells may not meet the accuracy requirements for synchronization. Furthermore, such accuracy requirement can be even worse if the length of the cyclic prefix (CP) is shortened. In relays and various devices to device links, there can be additional complexity for the standalone links to maintain accurate timing and align with global macro networks. As such, synchronous communication may not be ideal in certain applications.
[0072] [0072] Aspects of the present disclosure provide an apparatus and method for establishing communication without asynchronous as many protocol overhead requirements as synchronous communication. Asynchronous communication can enable more efficient communications, including the potential for energy savings. In one aspect, the apparatus and method for establishing asynchronous communication described herein may improve support for internal and/or independent small cells, relays and device to device links. In one aspect, the apparatus and method for establishing asynchronous communication described herein may enable low-power devices to send data with little overhead. Additionally, they can enable low latency by sending data immediately after a triggering event. Aspect of the present disclosure may allow greater mixed waveform coexistence to address constraints associated with efficiency, latency, and/or propagation (eg, mixed symbol durations for low latency, normal mobility, and static). The aspect of the present disclosure may allow progressive degradation while handling other radio access technology interference problems. For example, aspect of the present revelation may allow native support of coexistence with interferences that are in independent timelines.
[0073] [0073] Fig. 5 is a diagram illustrating an example of an asynchronous uplink 500, in accordance with some aspects of the present disclosure. Asynchronous uplink 500 may be associated with communication between a user equipment (UE) 502 and a network node (e.g., base station) 504. In one aspect of the present disclosure, asynchronous communication 506 may also be possible between another UE 508 and the network node 504. The first time sub-diagram 510 illustrates the protocol overhead typically associated with establishing an asynchronous uplink involving uplink misalignment operation. More specifically, users (eg, "User 1" and "User 2") can wait for sync messages 512, but choose to ignore grant messages before sending 514 data. The second time sub-diagram 516 illustrates the overhead of protocol typically associated with the establishment of an asynchronous uplink involving fully asynchronous operation. More specifically, users can choose to bypass both exchanges and sync messages when sending 518 data.
[0074] [0074] So, in general for asynchronous communication, users can choose to ignore subsidies or even synchronization messages in order to send information quickly and with low signaling cost. These more autonomous transaction capabilities may allow users to save energy in certain cases (eg small sporadic transmissions). Other advantages are described above.
[0075] [0075] Figure 6 is a diagram illustrating various examples of communication links (602, 604, 606). In one aspect, note that a link is defined by the associated transmitter and receiver. In such a case, each transmitter may have one or several receivers (or links). The case where one transmitter communicates with many receivers is similar to a base station downlink. However, there are other possible network connections. For example, each receiver may have one or several transmitters (or links). The process involving a receiver communicating with many transmitters is similar to an uplink base station, but again this is not the only case. Links between different senders and receivers can be within the same system bandwidth. This goes for different types of devices (eg base station, smartphone, sensor, tablet, equipment, etc.). In some cases, the network nodes (eg, transmitters and/or receivers) that establish communication links may be referred to as a staggered entity or a subordinate entity. For example, the apparatus 100 of Figure 1 may be a user equipment (UE), which may be a subordinate entity or a scheduling entity. In another example, the apparatus 100 of Fig. 1 may be a base station, which may be a scheduling entity.
[0076] [0076] Figure 7 is a diagram illustrating examples of Carrier Interference Interference (ICI) and a design approach for handling ICI and enabling asynchronous communication in accordance with some aspects of this description. Frequency domain waveform sub-diagram 700 shows how Orthogonal Frequency Division Multiple Access (OFDMA) signals can suffer from ICI when subcarriers are not aligned. More specifically, ICI can be caused by overlapping in frequency with zeros in the center subcarrier frequencies. Timing sub-diagram 702 illustrates several sub-frames, including the cyclic prefix (CP), followed by user data for several different users. Misalignment of one of the subframes (eg User 5 subframe) can cause ICI (eg the waveform represented in ICI subdiagram 700). To improve ICI, one aspect of the present invention may involve providing a multi-carrier OFDM filter bank system with or symbol windows for better subband separation. The desirable frequency domain representation of such a system may look like sub-diagram 704 where carriers in the multi-carrier waveform have less overlap. In such a case, the system may allow asynchronous operation between links, where different symbol numerology and cyclic prefix lengths can be used per link. Such a system can increase and scale down the bandwidth as needed.
[0077] [0077] Fig. 8 is a diagram illustrating an exemplary process 800 for asynchronous communication-enabled operational transmitter circuitry in accordance with some aspects of the present disclosure. In one aspect, process 800 may be performed by the transmitter circuitry of the transceiver 110 in Figure 1 or other suitable circuitry. At block 802, the process generates, in a first wireless device, including a waveform of one or more carriers. In one aspect, the method also shares, in the first wireless device, a multi-carrier spectrum (e.g., where the spectrum may be divided among a plurality of wireless devices, including the first wireless device).
[0078] [0078] At block 804, the process of shaping the waveform to reduce interference between the waveform and adjacent waveforms (e.g. to allow the first wireless device to transmit asynchronously relative to another wireless device or to improve the performance of the first wireless device when transmitting asynchronously). In one aspect, the process can shape the waveform to reduce interference between the waveform and adjacent waveforms (e.g., those waveforms generated by other wireless devices operating in the spectrum) such that any such interference is smaller than that of an unformed waveform. In one aspect, the process may shape the waveform to reduce interference between the waveform and adjacent waveforms (e.g., those waveforms generated by other wireless devices operating in the spectrum) to a pre-defined level. selected (for example, a pre-selected maximum level). In one aspect, the preset level is about -13 decibel milliwatts (dBm) adjacent across a 1 megahertz (MHz) spectrum. At block 806, the process of transmitting, in a spectrum, the shaped waveform asynchronously (eg, with respect to another wireless device in the spectrum). As will be discussed in more detail below, this process can be specifically implemented using (1) orthogonal frequency division multiple access modulation (OFDMA) with weighted overlap and add (WOLA) filtering, (2) frequency domain equalization multiple carriers (FDE), or (3) other suitable schemes to allow asynchronous communication.
[0079] [0079] Fig. 9 is a diagram 900 illustrating a simplified example of a hardware implementation for an apparatus employing a processing circuit 902 and adapted to operate the transmitter circuitry, in accordance with some aspects of the present disclosure. Processing circuit 902 may be provided in accordance with certain illustrated aspects with respect to processing system 114 of Figure 1. Processing circuit 902 has one or more processors 912, which may include a microprocessor, microcontroller, digital signal processor, a sequencer and/or a state machine. Processing circuit 902 can be implemented with a bus architecture, generally represented by the bus.
[0080] [0080] Processor 912 is responsible for general processing, including execution of software stored as code on computer-readable storage medium 914. The software, when executed by processor 912, configures one or more components of processing circuit 902 such that processing circuit 902 can perform the various functions described above for any particular apparatus. Computer readable storage medium 914 may also be used to store data that is handled by processor 912 during software execution. Processing circuit 902 further includes at least one of modules 904, 906, and 908. Modules, 904, 906, and 908, may be software modules running on processor 912 loaded with resident code and/or stored on the medium. computer readable storage 914, one or more hardware modules coupled to processor 912, or some combination thereof. The modules, 904, 906 and/or 908, may include microcontroller instructions, state machine configuration parameters, or some combination of these.
[0081] [0081] Module and/or circuit 904 may be configured to generate, in a first wireless device, including a waveform of one or more carriers. In one aspect, module and/or circuit 906 may be configured to perform the functions described with respect to block 802 in Figure 8, block 1302 in Figure 13, and/or block 1702 in Figure 17.
[0082] [0082] The 906 module and/or circuit can be configured to shape the waveform to reduce interference between the waveform and adjacent waveforms (for example, to allow the first wireless device to transmit asynchronously or to improve the performance of the first wireless device while transmitting asynchronously). In one aspect, module and/or circuit 906 may be configured to perform the functions described with respect to block 804 in Figure 8, block 1304 in Figure 13, and/or block 1704 in Figure 17.
[0083] [0083] The module and/or circuit 908 can be configured to transmit, in a spectrum, the shaped waveform asynchronously. In one aspect, module and/or circuit 908 may be configured to perform the functions described with respect to block 806 in Figure 8, block 1306 in Figure 13, and/or block 1706 in Figure 17.
[0084] [0084] Fig. 10 is a diagram illustrating an exemplary process of 1000 for asynchronous communication-enabled operational receiver circuitry in accordance with some aspects of the present disclosure.
[0085] [0085] Fig. 11 is a diagram illustrating a simplified example 100 of a hardware implementation for an apparatus employing a processing circuit of 1102 and adapted for receiver circuitry operating in accordance with some aspects of the present disclosure. Processing circuit 1102 may be provided in accordance with certain illustrated aspects with respect to processing system 114 of Figure 1. Processing circuit 1102 has one or more processors 1112 which may include a microprocessor, microcontroller, digital signal processor , a sequencer and/or a state machine. The 1102 processing circuit may be implemented with a bus architecture, represented generally by the 1116 bus. The 1116 bus may include any number of bus and bridge communicators, depending on the specific application of the 1102 processing circuit and the overall design constraints. . The bus 1116 interconnects various circuits, including a medium computer-readable storage device 1114 and one or more processors 11, devices 12, and/or hardware that cooperate to perform certain functions described herein, and which are represented by modules and/or circuits 1104 , 1106, 1108, and 1110. Bus 1116 may also power various other circuits, such as timing sources, timers, peripherals, voltage regulators, and power management circuits. A bus interface 1118 may provide an interface between the bus 11 and 16 of other devices, such as a transceiver 1120 or a user interface 1122. The transceiver 1120 may provide a wireless communications link for communication with various other apparatus. In some cases, transceiver 1120 and/or user interface 1122 may connect directly to bus 1116.
[0086] [0086] Processor 112 is responsible for general processing, including execution of software stored as code on computer-readable storage medium 1114. Software, when executed by processor 1112, configures one or more components of processing a circuit 102 in such a way so that the processing circuit 1102 can perform the various functions described above for any particular apparatus. The computer readable storage medium 114 may also be used to store data that is handled by the processor 1112 during software execution. Processing circuit 1102 further includes at least one of modules 1104, 1106, and 1108. Modules 1104, 1106, and 1108 may be software modules running on processor 1112 loaded with resident code and/or stored in read-only storage. per computer Medium 1114, one or more hardware modules together with the 1112 processor, or some combination thereof. The 1104, 1106, and/or 1108 modules may include microcontroller instructions, state machine configuration parameters, or some combination of these.
[0087] [0087] The module and/or circuit 1104 can be configured to receive, in the first wireless device, a communication signal through asynchronous in the spectrum. In one aspect, the module and/or circuit 1104 may be configured to perform the functions described with respect to block 1002 in Figure 10, block 1502 in Figure 15, and/or block 1902 in Figure 19.
[0088] [0088] The 1106 module and/or circuit can be configured to filter the received signal to reduce interference from other asynchronous communications in the spectrum. In one aspect, module and/or circuit 1106 may be configured to perform functions described with respect to block 1004 in Figure 10, block 1504 in Figure 15, and/or block 1904 in Figure 19.
[0089] [0089] The 1081 module and/or circuit can be configured to retrieve user data from the filtered signal. In one aspect, module and/or circuit 1108 may be configured to perform functions described with respect to block 1006 in Figure 10, block 1506 in Figure 15, and/or block 1906 in Figure 19.
[0090] [0090] Figure 12 is a diagram illustrating an example 1200 transmitter circuit to allow asynchronous communication using orthogonal frequency division modulation multiple access (OFDMA), with weighted overlap and add filtering (WOLA), in accordance with some aspects of the revelation. The transmitter circuit 1200 receives a number of user tones 1202 which are fed to an inverse fast Fourier transform (IFFT) 1204 (e.g. for OFDMA modulation). The output of the IFFT 1204 is supplied to a parallel to series (P/S) block 1206. A cyclic prefix (CP) block 1208 adds a cyclic prefix (CP) to the output of the P/S block 1206. CP block 1208 (eg transmit signal) is provided for a WOLA filter 1210. Sub-diagram 1212 illustrates an example of waveform filtering provided by WOLA filter 1210. Sub-diagram 1214 illustrates an example of the form of the resulting cumulative waveform after filtering by the WOLA filter
[0091] [0091] In one aspect, the WOLA 1210 filter uses the 1212-shaped pulse window, with the overlap and add to preserve roundness and reduce side lobes in the transmit signal. This is illustrated more specifically in fig. 26. Each OFDM symbol, which consists of the output of IFFT 2602 and a cyclic prefix 2606, can be suitably extended with a small prefix (in addition to the cyclic prefix) and small post-correction in which a left edge weighting function 2604 and right end weighting 2608 can be applied to the edges of the symbol. Each symbol can then be superimposed with the previous and future symbols at 2610 at points where the weighting functions have been applied. This process effectively tapers transitions between symbols, and results in tighter attenuation for the waveform spectrum.
[0092] [0092] While Figure 12 illustrates the transmitter circuit 1200 as including a first transmitter chain (1202, 1204, 1206, 1208, 1210), the transmitter circuit 1200 may also include a second transmitter chain (1202.N, 1204.N, 1206.N, 1208.N, 1210.N) and additional transmitter chains depending on the number of user tones (e.g., up to n user tones) supplied to the transmitter circuit 1200.
[0093] [0093] In one aspect, the use of aggressive WOLA on the transmitter can improve the tolerance of asynchronism. For example, an aggressive choice of window size on the WOLA transmitter, such that it is a larger fraction of the cyclic prefix, can improve async tolerance. Users providing input tones can adopt different symbol numerology and use guard tones. In one aspect, the methods described herein can implement this technique to achieve separation between synchronous and asynchronous carriers composed of OFDM waveforms, or waveforms that can be similarly low-complexity demodulated, i.e., domain equalization. frequency (FDE).
[0094] [0094] Figure 13 is a diagram illustrating an exemplary process 1300 for operational transmitter circuits enabled for asynchronous communication using orthogonal frequency division modulation (OFDMA) multiple access, with overlap filtering and weighted addition (WOLA), in accordance with with some aspects of the revelation. In one aspect, process 1300 may be performed by the transmitter circuit of Figure 12 or other suitable circuitry.
[0095] [0095] In block 1302, the process generates, in the first wireless device, a waveform to be transmitted in which the waveform includes one or more carriers. In one aspect, this may be accomplished by block 906 in Fig. 9. In the sub-block of block 1302 to 1302, the process generates a plurality of user tones to be transmitted. In one aspect, this may be performed by block 1202 in Fig. 12. In the sub-block of block 1302b 1302, the process applies Orthogonal Frequency Division Modulation Multiple Access (OFDMA), for the plurality of user tones. In one aspect, this can be performed by block 1204 in Fig. 12. In sub-block 1302c of block 1302, the process generates an OFDMA modulation transmit signal. In one aspect, this can be accomplished by blocks 1206 and/or 1208 in figure 12.
[0096] [0096] At block 1304, the process of shaping the waveform to reduce interference between the waveform and adjacent waveforms (e.g. to allow the first wireless device to transmit asynchronously or to improve performance of the first wireless device while transmitting asynchronously). In one aspect, this can be performed by block 906 in Fig. 9. In the sub-block of block 1304 of 1304, the process of filtering the transmission signal to enable the first wireless device to transmit asynchronously. In one aspect, the process of filtering the transmission signal in sub-block 1304 using a weighted overlay and adding filter (e.g., such as the WOLA filter of block 1210 in Fig. 12 ). In one aspect, the process of filtering the transmission signal to reduce interference between the waveform (e.g., the transmitting signal) and adjacent waveforms (e.g., other signals adjacent to the transmitting signal in spectrum) and to allow the first wireless device to transmit asynchronously or to improve the performance of the first wireless device when it transmits asynchronously.
[0097] [0097] In block 1306, the process transmits, over the spectrum, the waveform in an asynchronous way. In the sub-block of block 1306 to 1306, the process transmits the transmission signal (e.g., the filtered transmission signal). In one aspect, this may be accomplished by a block 10 in figure 1, block 908 in figure 9, and/or 1200 square in figure 12.
[0098] [0098] In one aspect, the 1300 process also handles collisions between users. For example, in one aspect, the process provides preselected bandwidth for asynchronous communications on a wireless network, and then retrieves signals from two preselected wireless devices communicating asynchronously, where recovery may involve using multiple passcode splitting between the two pre-selected wireless devices. In other cases, other collision manipulation techniques may be used.
[0099] [0099] Figure 14 is a diagram illustrating an example of a 1400 receiver circuit to enable asynchronous communication using orthogonal frequency division modulation (OFDMA) multiple access with weighted overlap and add filtering (WOLA), of according to some aspects of the revelation. Receiver circuit 1400 receives signal 1402 (e.g. from a user/wireless device in an OFDMA communication system) supplied to a WOLA 1404 filter. The output of the WOLA 1404 filter (e.g. to reduce interference from other users that communicate asynchronously in the OFDMA communication system) is supplied to a series to parallel (S/P) block 1406. e.g. to perform OFDMA demodulation). The outputs of the 1408 FFT block are provided for a frequency domain equalization (FDE) block of 1410 that generates/recovers user output tones of 1412.
[00100] [00100] While Figure 14 illustrates receiver circuit 1400 as including a first receiver chain (1402, 1404, 1206, 1408, 1410, 1412), receiver circuit 1400 may also include a second receiver chain (1402.N, 1404). .N, 1406.N, 1408.N, 1410.N, 1412.N) and additional receiver chains depending on the number of user tones (e.g. up to N user tones) to be retrieved by the receiver circuit 1400 .
[00101] [00101] In this way, a WOLA filter 1404 can be included in the receiver circuit 1400 to further reduce inter-carrier interference (ICI). WOLA alignment and shape can be adjusted based on interference level (eg from ICI) and multipath delay dispersion. In one aspect, the 1400 receiver circuit does not include the WOLA filter.
[00102] [00102] Figure 15 is a diagram illustrating an exemplary 1500 process for asynchronous communication-enabled operational receiver circuitry using orthogonal frequency division modulation (OFDMA) multiple access with weighted overlap and add-on filtering (WOLA), from according to some aspects of the revelation. In one aspect, process 1500 may be performed by the receiver circuitry of Fig. 14 or other suitable circuitry.
[00103] [00103] In block 1502, the process receives, in a first wireless device, a signal through asynchronous communication in a spectrum. In one aspect, this may be accomplished by a block 104 in Fig. 11. In the sub-block of the block 1502 to 1502, the process receives a signal from a user in an Orthogonal Frequency Division Multiple Access (OFDMA) communications system. In one aspect, this may be accomplished by block 1402 in Figure 14.
[00104] [00104] In block 1504, the process filters the received signal to reduce interference from other asynchronous communications in the spectrum. In one aspect, this may be accomplished by block 1106 in Fig. 11 and/or block 1404 in Fig. 14. In sub-block 1504A of block 1504, the process filters the receive signal to reduce interference from other asynchronous communications in the OFDMA system. In one aspect, the process of filters the signal received at block 1504A using a weighted overlay and add filter (e.g., such as the WOLA filter 1404 of Fig. 14 ).
[00105] [00105] In block 1506, the process retrieves user data from the filtered signal. In one aspect, this can be performed by block 1108 in Fig. 11 and/or blocks 1406, 1408 and/or 1410 in Fig. 14. In the sub-block of block 1506 to 1506, the process applies OFDMA demodulation to the received signal. to generate a plurality of frequency domain outputs. In one aspect, this may be accomplished by block 1408 in Fig. 14. In sub-block 1506b of block 1506, the process applies frequency domain equalization (FDE) to the frequency domain outputs to retrieve a plurality of user tones. In one aspect, this may be accomplished by block 1410 in Fig.
[00106] [00106] In one aspect, the 1500 process also handles collisions between users. For example, in one aspect, the process provides preselected bandwidth for asynchronous communications on a wireless network, and then retrieves signals from two preselected wireless devices communicating asynchronously, where recovery may involve using multiple passcode splitting between the two pre-selected wireless devices. In other cases, other collision manipulation techniques may be used.
[00107] [00107] Fig. 16 is a diagram illustrating an example transmitter circuit 1600 for enabling asynchronous communication using multiple carrier frequency domain equalization (FDE), in accordance with some aspects of the disclosure. Transmitter circuit 1600 includes a number of user input signals (e.g., S0(n), S1(n) ... SN-1(n)) 1602 (e.g., baseband signals from user to be transmitted). The first user signal (e.g. S0(n)) is upsampled in block 1604 (e.g. in k0), appended with a cyclic prefix (CP), in block 1606, filtered with a filter in block 1608 (e.g. for example, in H(ƒ), and then modulated at a subcarrier frequency in block 1610 (e.g., ƒ0). In one aspect, single carrier waveforms can be used for energy efficiency. In one aspect, the User bandwidths can be scaled as needed (eg 300 kilohertz (kHz) or one mega hertz (MHz) per carrier or broadband.) Sub-diagram waveform 1612 represents the H-frequency filter response (F) In one aspect, the frequency response of the sub-diagram waveform 1612 may correspond to 1/16 a band occupancy (BW) with beta equal to 0.2 at -40 dB temperature with 10 symbols per extension .substructure 1614 illustrates the structure of a typical subframe including a single carrier symbol FDE (SC-FDE). In this aspect, the circuitry of the transmitter 1600 provides for carrier-separated symbols with no synchronization requirement. in one aspect, the transmitter circuit 1600 provides frequency division multiplexing of separate user subbands to reduce adjacent channel interference (ACI).
[00108] [00108] Fig. 17 is a diagram illustrating an exemplary process 1700 for operational transmitter circuits enabled for asynchronous communication using multi-carrier frequency domain (FDE) equalization, in accordance with some aspects of the disclosure. In one aspect, process 1700 may be performed by the transmitter circuitry of Figure 16 or other suitable circuitry.
[00109] [00109] In block 1702, the process generates, in a first wireless device, including a waveform of one or more carriers. In one aspect, this may be accomplished by block 904 in Fig. 9. In sub-block 1702a of block 1702, the process generates a user baseband signal to be transmitted. In one aspect, this may be accomplished by block 1602 in Fig. 16. In sub-block 1702b of block 1702, the process up samples the baseband signal from users, thus generating a remixed signal. In one aspect, this may be accomplished by block 1604 in Fig. 16. In sub-block 1702c of block 1702, the process generates a cyclic prefix. In sub-block 1702d of block 1702, the process inserts the cyclic prefix into the upsampled signal. In one aspect, this may be accomplished by block 1606 in Figure 16.
[00110] [00110] In block 1704, the process of shaping the waveform to reduce interference between the waveform and adjacent waveforms (e.g. to allow the first wireless device to transmit asynchronously or to improve performance of the first wireless device while transmitting asynchronously). In one aspect, this may be accomplished by block 906 in Figure 9 and/or block 1608 in Figure 16. In subblock 1704a of block 1704, the process filters the signal again mixed with the cyclic prefix, thus generating a filtered signal. In one aspect, this may be accomplished by block 906 in Figure 9 and/or block 1608 in Figure 16. In sub-block 1704b of block 1704, the process modulates the filtered signal to a preselected user subcarrier, thereby generating a waveform (eg shaped waveform). In one aspect, this may be accomplished by block 906 in Figure 9 and/or block 1610 in Figure 16.
[00111] [00111] In block 1706, the process of transmitting, in a spectrum, the shaped waveform asynchronously. In one aspect, this may be accomplished by block 908 in figure 9, and/or block 1600 in figure 16.
[00112] [00112] In one aspect, the 1700 process also handles collisions between users. For example, in one aspect, the process provides preselected bandwidth for asynchronous communications on a wireless network, and then retrieves signals from two preselected wireless devices communicating asynchronously, where recovery may involve using multiple passcode splitting between the two pre-selected wireless devices. In other cases, other collision manipulation techniques may be used.
[00113] [00113] Fig. 18 is a diagram illustrating an example of an 1800 receiver circuit to allow asynchronous communication using multiple carrier frequency domain equalization (FDE), in accordance with some aspects of the disclosure. Receiver circuit 1800 receives an input signal (e.g., user signal communicated asynchronously in a multi-carrier communication system) at the front end of radio frequency (RFFE) block 1802. The next four components (1804, 1806, 1808, 1810) collectively reduce the received signal to the subcarrier and bandwidth occupied. More specifically, block 1804 can demodulate the received signal. Block 1806 can apply low pass filtering (LPF). Block 1808 can remove the cyclic prefix (CP) and block 1810 can sample the received signal. After the received signal has been reduced, it is fed to a serial/parallel block (S/P) 1812. The output of the S/P is fed to a fast Fourier transform (FFT) 1814. Note that the waveform of baseband at 1806 can be oversampled to a point such that an FFT of N points after CP removal at 1808 can be used to retrieve the information encoded over the data tones. However, since the waveform can actually have its energy concentrated in a narrower bandwidth captured by the filter at 1806, it follows that the baseband waveform can be further subsampled by some L rate such that the FFT complexity can be reduced to N/L points 1814, when retrieving information encoded along the tones. The output of the FFT 1814 (eg, processed signal derived from the user's initial input signal) is provided to a frequency domain equalization (FDE) block 1816 (eg, with spatial capabilities combine).
[00114] [00114] As an aside, note that FDE is an effective technique, which exhibits the property of relatively low complexity which grows linearly with increasing number of keys in the FFT, compared to the conventional time-domain equalization. However, in practical broadband wireless communications, there is not only multiple paths, but also narrowband interference (NBI). The conventional FDE method cannot account for NBI and performance degrades as a result. Using FDE with spatial capabilities combine can effectively suppress NBI to get maximum signal-to-noise. FDE with spatial capabilities combine can employ a conventional algorithm, such as recursive least squares or mean least squares.
[00115] [00115] The output of the FDE block 1816 is provided to a fast inverse Fourier transform (IFFT) 1818 compatible with the size of the FFT 1814 used to transform the received samples to the frequency domain, which in fig. 18 is N points/L. The output of the IFFT 1818 is then fed to a parallel to series (P/S) block 1820. The output of the P/S block 1820 is then fed to a downsampling (K/L) block 1822 and then the equalized symbols can be demodulated. In one aspect, the use of FDE with PC (as in the circuits of Figures 16 and 18) thus reduces inter-symbol interference and provides equalizer complexity scaling like OFDM.
[00116] [00116] Fig. 19 is a diagram illustrating an exemplary process 1900 for operational receiver circuitry enabled for asynchronous communication using multiple carrier frequency domain (FDE) equalization, in accordance with some aspects of the disclosure. In one aspect, process 1900 may be performed by the receiver circuitry of Fig. 18 or other suitable circuitry.
[00117] [00117] In block 1902, the process receives, in a first wireless device, a communication signal through a spectrum in the asynchronous. In sub-block 1902a of block 1902, the process receives a signal from a user to communicate asynchronously in a multi-carrier communication system. In one aspect, this may be accomplished by a block 104 in figure 11 and/or block 1802 in figure 18.
[00118] [00118] In block 1904, the process filters the received signal to reduce interference from other asynchronous communications in the spectrum. In subblock 1904a of block 1904, the process demodulates and filters the receive signal to obtain a user signal on a preselected subcarrier, thereby reducing interference from other wireless devices communicating asynchronously in the spectrum. In one aspect, this may be accomplished by a block 106 in figure 11 and/or blocks 1804-1812 in figure 18.
[00119] [00119] In block 1906, the process retrieves user data from the filtered signal. In one aspect,
[00120] [00120] In one aspect, the 1900 process also handles collisions between users. For example, in one aspect, the method provides preselected bandwidth for asynchronous communications on a wireless network, and then retrieves signals from two preselected wireless devices communicating asynchronously, where recovery may involve using multiple passcode splitting between the two pre-selected wireless devices. In other cases, other collision manipulation techniques may be used.
[00121] [00121] In addition to design waveform or shape as described above figs. 7-19, there may be a need to engage in network planning and signaling (eg, bandwidth allocation) to support asynchronous communications. Therefore, figures 20-25 pertain to network planning and signaling.
[00122] [00122] Fig. 20 is a diagram illustrating two examples of bandwidth allocation for asynchronous communications in a wireless communications network in accordance with some aspects of the disclosure. The first 2000 example illustrates a provisioning of bandwidth to Link A, Link B, and Link C for asynchronous communication based on timing differences (eg, timing offset). For each link (e.g. Link A, Link B, Link C) in Figure 20, the connection is represented as a sequence of unshaded rectangles followed by shaded rectangles where the unshaded rectangles represent a CP length and the shaded rectangles represent a CP length. symbol length.
[00123] [00123] Fig. 21 is a diagram illustrating an example of bandwidth allocation for synchronous and asynchronous communication using static or semi-static provisioning in a wireless communications network in accordance with some aspects of the present disclosure. Link A, Link B, Link C are links involved in synchronous communication, while link D is involved in asynchronous communications. For each link (e.g. Link A, Link B, Link C) in Figure 21, the connection is represented as a sequence of unshaded rectangles followed by shaded rectangles where the unshaded rectangles represent a CP length and the shaded rectangles represent a CP length. symbol length. In one aspect, the network can void bandwidth for synchronous and asynchronous communications. For example, in one aspect, the network can allocate bandwidth for asynchronous communications to low-power and low-latency devices. Startup type, providing another bandwidth for synchronous communications to nominal links with higher spectral efficiency. In one case, subsidy-free transmission may be allowed for the small payload links. In one aspect, the provisioning of network bandwidth can be based on peak demand, traffic expectations or other characteristics of the network. For example, in one aspect, dispositions may change slowly based on historical demand and/or loading patterns.
[00124] [00124] Fig. 22 is a diagram illustrating an example of bandwidth allocation for synchronous and asynchronous communication using thin provisioning in a wireless communications network in accordance with some aspects of the present disclosure. In one aspect, the network can dynamically provision bandwidth for Link A, Link
[00125] [00125] Fig. 23 is a diagram illustrating examples for allocating asynchronous communications bandwidth with symbol numerology optimized for different use cases in a wireless communications network in accordance with some aspects of the present description. Link A and Link B is using basic symbol numerology that can be suitable for indoor/outdoor activities while mobile. Link C is using fine symbol numerology which can be appropriate for inner activity while static. Link D is using a small payload or low power symbol numerology that can be similar to thin numerology. For each link (e.g. Link A, Link B, Link C, Link D) in Figure 23, the link is represented as a sequence of shaded rectangles followed by shaded rectangles where the unshaded rectangles represent a CP length and the shaded rectangles represent a symbol length. In one aspect, Figure 23 illustrates that design options can allow for optimized symbol numerology multiplexing for various use cases.
[00126] [00126] Fig. 24 is a diagram illustrating an exemplary process 2400 for allocating bandwidth for asynchronous communications in a wireless communications network in accordance with some aspects of the present disclosure. In one aspect, process 2400 may be performed in accordance with one or more of the examples shown in Figures 20, 21, and 22. In one aspect, process 2400 may be performed using wireless device 100 of Figure 1 (e.g., as a base station or the equivalent on a wireless network). At block 2402, the process provides a preselected bandwidth for communications on a wireless network. At block 2404, the process arranges a first portion of the preselected bandwidth for synchronous communication in the wireless network. At block 2406, the process arranges, based on a demand for traffic on the wireless network, a second portion of the preselected bandwidth for asynchronous communications on the wireless network. In one aspect, traffic demand includes a forecasted traffic demand (eg, static demand) and/or a real-time traffic demand (eg, dynamic demand).
[00127] [00127] In one aspect, the 2400 process also handles collisions between users. For example, in one aspect, the process recovers signals from two pre-selected wireless devices communicating asynchronously, where recovery may involve the use of code division multiple access between the two pre-selected wireless devices. selected. In other cases, other collision manipulation techniques may be used.
[00128] [00128] Fig. 25 is a diagram 2500 illustrating a simplified example of a hardware implementation for an apparatus employing a 2502 processing circuit and adapted to allocate asynchronous communications bandwidth in a wireless communications network in accordance with some aspects of the present description. Processing circuit 2502 may be provided in accordance with certain aspects illustrated with respect to processing system 114 of Figure 1. Processing circuit 2502 has one or more processors 2512, which may include a microprocessor, microcontroller, signal processor digital, a sequencer and/or a state machine. Processing circuit 2502 may be implemented with a bus architecture, generally represented by bus 2516. Bus 2516 may include any number of bus and bridge communicators, depending on the specific application of the 2502 processing circuit and overall design constraints. Bus 2516 unites various circuits, including a computer-readable storage medium 2514 and one or more processors 2512 and/or hardware devices that cooperate to perform certain functions described herein, and which are represented by modules and/or circuits 2504, 2506 and
[00129] [00129] The 2512 processor is responsible for general processing, including the execution of software stored as code on the computer-readable storage medium, 2514. The software, when executed by the 2512 processor, configures one or more components of the 2502 processing circuit. , such that processing circuit 2502 can perform the various functions described above for any particular apparatus. The computer readable storage medium 2514 may also be used for storing data that is handled by the processor 2512 when running software. Processing circuit 2502 further includes at least one of modules 2504, 2506, and 2508. Modules 2504, 2506, and 2508 may be software modules running on processor 2512 loaded from resident code and/or or stored on computer readable storage medium 2514, one or more hardware modules coupled to processor 2512, or some combination thereof. The modules, 2504, 2506 and/or 250.8 may include microcontroller instructions, state machine configuration parameters, or some combination of these.
[00130] [00130] The 2504 module and/or circuit can be configured to provide a pre-selected bandwidth for communications over a wireless network. In one aspect, module and/or circuit 2504 may be configured to perform the functions described with respect to block 2402 in Figure 24.
[00131] [00131] The 2506 module and/or circuit can be configured to provide a first portion of the pre-selected bandwidth for synchronous communication on the wireless network. In one aspect, module and/or circuit 2506 may be configured to perform the functions described with respect to block 2404 in Figure 24.
[00132] [00132] The module and/or circuit 2508 can be configured to provisions, based on the demand for traffic on the wireless network, a second portion of the pre-selected bandwidth for asynchronous communications on the wireless network. In one aspect, module and/or circuit 2508 may be configured to perform the functions described with respect to block 2406 in Figure 24.
[00133] [00133] Some general aspects of WOLA filtering are described above for figures 12-15. More specific aspects of WOLA filtering are described below for figures 26-27 (eg for a transmitter and then for a receiver).
[00134] [00134] Fig. 26 is a schematic diagram illustrating a transmission operation of a weighted window overlay and add filter (WOLA), in accordance with some aspects of the present description. In operation, symbol input 2602-A is received from the output of an IFFT upstream block (see, for example, IFFT 1004 in Fig. 10 ). A preselected portion of the end (e.g. right end) of A-symbol 2602 is copied, weighted with left edge weighting B-function 2604, and appended to the beginning of A-symbol 2602 as the cyclic prefix (CP) 2606. The right edge weighting A-function 2608 can also be applied to the end of the a-symbol 2602. The resulting transmission waveform 2610 for the A-symbol is shown at the bottom of Figure 26. In effect, the WOLA filter can be used to control the length and degree of edge attenuation of the transmit waveform derived from the IFFT input symbol.
[00135] [00135] Fig. 27 is a schematic diagram illustrating a receive windowing operation of a weighted overlap and addition (WOLA) filter, in accordance with some aspects of the present disclosure. In operation, the transmitted waveform (e.g. from WOLA filter operation of Fig. 26) was captured and stored in a receiving sample store for processing. The transmitted waveform may or may not have WOLA filtering along its edges, as discussed earlier. The received waveform may be shortened to the FFT input length by first applying a weighted average window 2702 which may be larger in size than the FFT input length to accommodate more gradual attenuation. Then the edges of the weighted average output step can be superimposed and added through block 2704. The right side of the weighted average output is added to the left side of the waveform, and vice versa to the other side in order to to preserve circularity. Finally, a segment within this output of a length equal to the FFT input is selected for further processing. Analogous to the transmitter side, the WOLA receive filter can be used to control the length and degree of edge attenuation of the receive waveform for further processing at the FFT input.
[00136] [00136] The window length/placement in Figure 26-27 can be determined based on a number of factors, including, for example, the energy imbalance between the signal and the interference, the frequency separation between the signal and the interference , and residual interference (no signal interference). In addition, the emission floor of the dominant interferer(s) can also be considered for window placement.
[00137] [00137] Aspects of the present disclosure provide waveform design to reduce cross-link carrier interference. At least two system implementations have been described, including the transmit waveform model for asynchronous communications (e.g. figure 8, 9, 12, 13, 16, 17) and receiver waveform design for asynchronous communications (e.g. example, figure 10, 11, 14, 15, 18, 19).
[00138] [00138] Aspects of this disclosure also provide for network design in asynchronous modes. More specifically, networks may include multiple links with different symbols, multiple links with different time displacements, and/or both symbol and timing differences.
[00139] [00139] Aspects of this disclosure also provide for network planning and signaling for asynchronous communication. More specifically, networks can arrange between synchronous and asynchronous communication using static and/or dynamic partitioning. In one aspect, the split may be based on load and traffic demand. In one aspect, the network may include provision for collision handling such as using CDMA and canceling successive interference. In one aspect, the network may comply with requirements on acknowledgment (ACK) of asynchronous transmissions.
[00140] [00140] Aspects of the present disclosure include methods for allowing the coexistence of synchronous and asynchronous subcarriers within a given system bandwidth, and providing mechanisms for provisioning the bandwidth accordingly.
[00141] [00141] As readily appreciated by those skilled in the art, the various aspects described throughout this description can be extended to any suitable telecommunication systems, network architectures and communication standards. As an example, several aspects can be applied to UMTS systems, such as W-CDMA, TD-SCDMA, and TD-CDMA. Various aspects can also be applied to systems employing Long Term Evolution (LTE) (in FDD, TDD, or both modes), LTE-Advanced (LTE-A) (in FDD, TDD, or both modes), 5G, CDMA2000, Evolution -Optimized Data (EV-DO), Ultra Mobile Broadband (UMB), IEEE
[00142] [00142] Within the present description, the word "exemplary" is used to mean "serving as an example, case or illustration". Any implementation or aspect described herein as "exemplary" should not necessarily be construed as preferred or advantageous over other aspects of the present disclosure. Likewise, the term "aspects" does not require that all aspects of the invention include the functionality, advantage or mode of operation discussed. The term “coupled” is used here to refer to the direct or indirect coupling between two objects. For example, if object A physically touches object B, and object B touches object C, then objects A and C can still be considered coupled to each other, even if they do not physically touch each other directly. For example, a first array can be coupled to a second array in a package even though the first array is never physically in direct contact with the second array. The terms "circuit" and "circuitry" are widely used, and are intended to include both hardware implementations of electrical devices and conductors that, when connected and configured, allow the performance of the functions described in the present disclosure, without limitation. as to the type of electronic circuits, as well as software implementations of information and instructions which, when executed by a processor, enable the performance of the functions described in the present disclosure.
[00143] [00143] One or more of the components, steps, features, and/or functions illustrated in Figures 1-27 may be rearranged and/or combined into a single component, step, feature, or function, or incorporated into multiple components, steps, or functions. Additional elements, components, steps, and/or functions can also be added without departing from the innovative features described herein. The apparatus, devices and/or components illustrated in figures 1-27 may be configured to perform one or more of the methods, or steps, features described herein. The new algorithms described herein can also be effectively implemented in software and/or incorporated in hardware.
[00144] [00144] It should be understood that the specific order or hierarchy of steps in the processes described is an illustration of the exemplary processes. Based on design preferences, it is understood that the order or hierarchy of steps in specific methods may change. The method accompanying the orders presents elements of the various steps in a sample order, and is not intended to be limited to the specific order or hierarchy presented, unless specifically noted.
[00145] [00145] The foregoing description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects. Thus, the claims are not intended to be limiting of the aspects shown herein, but full scope should be granted in accordance with the language of the claims, where reference to an element in the singular is not intended to mean "one and only one." unless specifically stated so, but rather "one or more". Unless specifically stated otherwise, the term “one” refers to one or more. A phrase referring to “at least one of a list of items” refers to any combination of those items, including individual members As an example, “at least one of: a, b, or c” is intended to cover : a, b ; ç; a and b; a and c, b and c; and a, b and c. All structural and functional equivalents to the elements of the various aspects described throughout this disclosure, which are known or which will later be known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the claims. Furthermore, nothing disclosed herein is intended to be dedicated to the public regardless of whether such disclosure is expressly cited in the claims. No element of claim shall be interpreted in accordance with the provisions of 35 USC § 112, sixth paragraph, unless the element is expressly cited using the phrase "means to" or, in the case of a method claim, the element is cited. using the phrase “step to”.
[00146] [00146] Accordingly, the various features associated with the examples described herein and shown in the accompanying drawings can be implemented in different examples and implementations without departing from the scope of the description. Therefore, while certain specific constructions and arrangements have been described and shown in the accompanying drawings, such implementations are merely illustrative and not restrictive of the scope of the description, since various other additions and modifications, and deletions, from the described implementations will be evident to those of common knowledge in the art. Thus, the scope of revelation is determined by the literal language, and its legal equivalents, of the claims that follow.

权利要求:
Claims (68)
[1]
1. Wireless communication method, comprising: generating in a first wireless device, a waveform comprising one or more carriers; modeling the waveform to reduce interference between the waveform and adjacent waveforms; and transmit, in a spectrum, the modeled waveform asynchronously.
[2]
A wireless communication method as claimed in claim 1: wherein generating, in the first wireless device, the waveform comprising one or more carriers comprises: generating a plurality of user tones to be transmitted; applying orthogonal frequency division multiple access modulation (OFDMA) to the plurality of user tones; and generating a transmission signal from the OFDMA modulation; wherein shaping the waveform to reduce interference between the waveform and adjacent waveforms comprises: filtering the transmit signal to enable the first wireless device to transmit asynchronously; and wherein transmitting, in the spectrum, the asynchronously modeled waveform comprises transmitting the transmit signal.
[3]
The method of claim 2, wherein filtering the transmission signal to enable the first wireless device to transmit asynchronously comprises filtering the transmission signal using a weighted addition and superposition filter.
[4]
The method of claim 3, wherein filtering the transmission signal using the weighted addition and overlap filter comprises copying and weighting a portion of an input symbol derived from one of the plurality of user tones and appending to portion of the input symbol to a start of the input symbol.
[5]
A wireless communication method according to claim 1: wherein generating, in the first wireless device, the waveform comprising one or more carriers comprises: generating a user baseband signal to be transmitted; upsampling the user baseband signal, thereby generating an upsampled signal; generate a cyclic prefix; and inserting the cyclic prefix into the upsampled signal; wherein modeling the waveform to reduce interference between the waveform and adjacent waveforms comprises: filtering the upsampled signal with the cyclic prefix, thereby generating a filtered signal; and modulating the filtered signal on a user preselected subcarrier, thereby generating the modeled waveform.
[6]
6. A wireless communication device, comprising: means for generating, in a first wireless device, a waveform comprising one or more carriers;
means for shaping the waveform to reduce interference between the waveform and adjacent waveforms; and means for transmitting, in a spectrum, the modeled waveform asynchronously.
[7]
A wireless communication device as claimed in claim 6: wherein the means for generating, in the first wireless device, the waveform comprising one or more carriers comprises: means for generating a plurality of user tones to be transmitted; means for applying orthogonal frequency division multiple access modulation (OFDMA) to the plurality of user tones; and means for generating a transmission signal from the OFDMA modulation; wherein the means for shaping the waveform to reduce interference between the waveform and adjacent waveforms comprises: means for filtering the transmission signal to enable the first wireless device to transmit asynchronously; and wherein transmitting, in the spectrum, the asynchronously patterned waveform comprises means for transmitting the transmission signal.
[8]
The wireless communication device of claim 7, wherein the means for filtering the transmission signal to enable the first wireless device to transmit asynchronously comprises means for filtering the transmission signal using a plus filter. and weighted overlap.
[9]
A wireless communication device according to claim 8, wherein the means for filtering the transmission signal using the weighted addition and superposition filter comprises means for copying and weighting a portion of an input symbol derived from one of the plurality of user tones and appending the input symbol portion to a start of the input symbol.
[10]
A wireless communication device as claimed in claim 6: wherein means for generating, in the first wireless device, the waveform comprising one or more carriers comprises: means for generating a user baseband signal to be transmitted; means for upsampling the user baseband signal, thereby generating an upsampled signal; means for generating a cyclic prefix; and means for inserting the cyclic prefix into the upsampled signal; wherein the means for shaping the waveform to reduce interference between the waveform and adjacent waveforms comprises: means for filtering the upsampled signal with the cyclic prefix, thereby generating a filtered signal; and means for modulating the filtered signal on a user preselected subcarrier, thereby generating the modeled waveform.
[11]
11. Wireless communication device, comprising: at least one processor; a memory communicatively coupled to the at least one processor; and a communication interface communicatively coupled to the at least one processor, wherein the at least one processor is configured to: generate, in a first wireless device, a waveform to be transmitted, the waveform comprising one or more more carriers; modeling the waveform to reduce interference between the waveform and adjacent waveforms; and transmit, in a spectrum, the modeled waveform asynchronously.
[12]
The wireless communication device of claim 11, wherein the at least one processor is further configured to: generate a plurality of user tones to be transmitted; applying orthogonal frequency division multiple access modulation (OFDMA) to the plurality of user tones; and generating a transmission signal from the OFDMA modulation; filtering the transmission signal to enable the first wireless device to transmit asynchronously; and transmit the transmission signal.
[13]
The wireless communication device of claim 12, wherein the at least one processor is further configured to: filter the transmission signal using a weighted addition and overlap filter
[14]
A wireless communication device as claimed in claim 13, wherein the at least one processor is further configured to:
copying and weighting a portion of an input symbol derived from one of the plurality of user tones and appending the portion of the input symbol to a start of the input symbol.
[15]
The wireless communication device of claim 11, wherein the at least one processor is further configured to: generate a user baseband signal to be transmitted; upsampling the user baseband signal, thereby generating an upsampled signal; generate a cyclic prefix; and inserting the cyclic prefix into the upsampled signal; filtering the upsampled signal with the cyclic prefix, thereby generating a filtered signal; and modulating the filtered signal on a user preselected subcarrier, thereby generating the modeled waveform.
[16]
16. Non-transient computer readable medium storing computer executable code, comprising code for: generating in a first wireless device, a waveform comprising one or more carriers; modeling the waveform to reduce interference between the waveform and adjacent waveforms; and transmit, in a spectrum, the modeled waveform asynchronously.
[17]
A computer readable medium according to claim 16, further comprising code for: generating a plurality of user tones to be transmitted;
applying orthogonal frequency division multiple access modulation (OFDMA) to the plurality of user tones; and generating a transmission signal from the OFDMA modulation; filtering the transmission signal to enable the first wireless device to transmit asynchronously; and transmit the transmission signal.
[18]
A computer readable medium according to claim 17, further comprising code for: filtering the transmission signal using a weighted addition and superposition filter.
[19]
A computer readable medium according to claim 18, further comprising code for: copying and weighting a portion of an input symbol derived from one of the plurality of user tones and appending the portion of the input symbol to a start of the input symbol.
[20]
A computer readable medium according to claim 16, further comprising code for: generating a user baseband signal to be transmitted; upsampling the user baseband signal, thereby generating an upsampled signal; generate a cyclic prefix; and inserting the cyclic prefix into the upsampled signal; filtering the upsampled signal with the cyclic prefix, thereby generating a filtered signal; and modulating the filtered signal on a user preselected subcarrier, thereby generating the modeled waveform.
[21]
21. A wireless communication method, comprising: receiving, at a first wireless device, a signal via asynchronous communications on a spectrum; filter the received signal to reduce interference from other asynchronous communications in the spectrum; and retrieve user data from the filtered signal.
[22]
The wireless communication method of claim 21, wherein receiving, at the first wireless device, the signal via asynchronous communications in the spectrum comprises: receiving the signal from a second wireless device at a orthogonal frequency division multiple access (OFDMA) communication system; wherein filtering the received signal to reduce interference from other asynchronous communications in the spectrum comprises: filtering the received signal to reduce interference from other asynchronous communications in the OFDMA system; and wherein recovering user data from the filtered signal comprises: applying OFDMA demodulation to the received signal to generate a plurality of frequency domain outputs; and applying frequency domain equalization to the frequency domain outputs to retrieve a plurality of user tones from the second wireless device.
[23]
The method of claim 22, wherein filtering the received signal to reduce interference from other asynchronous communications in the OFDMA system comprises filtering the received signal using an addition and weighted overlap filter.
[24]
The method of claim 23, wherein filtering the received signal to reduce interference from other asynchronous communications in the OFDMA system comprises copying and weighting a final portion of an input symbol in the received signal and appending the final portion from the input symbol to a start of the input symbol.
[25]
The method of claim 23, wherein filtering the received signal to reduce interference from other asynchronous communications in the OFDMA system comprises copying and weighting an initial portion of an input symbol in the received signal and appending the portion start of the input symbol to one end of the input symbol.
[26]
A wireless communication method as claimed in claim 21: wherein receiving, at the first wireless device, the signal via asynchronous communications in the spectrum comprises: receiving a signal from a second wireless device communicating asynchronously in the spectrum; wherein filtering the received signal to reduce interference from other asynchronous communications in the spectrum comprises: demodulating and filtering the received signal to obtain a user signal on a preselected subcarrier, thereby reducing interference from other devices without wire communicating asynchronously across the spectrum; and wherein recovering user data from the filtered signal comprises: applying frequency domain equalization to a processed signal derived from the user signal, thereby generating a plurality of equalized symbols; and retrieve user data from the equalized symbols.
[27]
The method of claim 26, further comprising: removing a cyclic prefix from the user signal before applying frequency domain equalization.
[28]
28. A wireless communication device, comprising: means for receiving, in a first wireless device, a signal via asynchronous communications on a spectrum; means for filtering the received signal to reduce interference from other asynchronous communications in the spectrum; and means for retrieving user data from the filtered signal.
[29]
A wireless communication device as claimed in claim 28: wherein the means for receiving, in the first wireless device, the signal via asynchronous communications in the spectrum comprises: means for receiving the signal from a second device wirelessly in an orthogonal frequency division multiple access (OFDMA) communication system; wherein the means for filtering the received signal to reduce interference from other asynchronous communications in the spectrum comprises: means for filtering the received signal to reduce interference from other asynchronous communications in the OFDMA system; and wherein the means for retrieving user data from the filtered signal comprises: means for applying OFDMA demodulation to the received signal to generate a plurality of frequency domain outputs; and means for applying frequency domain equalization to the frequency domain outputs to retrieve a plurality of user tones from the second wireless device.
[30]
A wireless communication device as claimed in claim 29, wherein the means for filtering the received signal to reduce interference from other asynchronous communications in the OFDMA system comprises means for filtering the received signal using an addition and overlay filter. weighted.
[31]
The wireless communication device of claim 30, wherein the means for filtering the received signal to reduce interference from other asynchronous communications in the OFDMA system comprises means for copying and weighting a final portion of an input symbol. in the received signal and append the final portion of the input symbol to a start of the input symbol.
[32]
The wireless communication device of claim 30, wherein the means for filtering the received signal to reduce interference from other asynchronous communications in the OFDMA system comprises means for copying and weighting an initial portion of a signal symbol. input on the received signal and attach the leading portion of the input symbol to one end of the input symbol.
[33]
A wireless communication device as claimed in claim 28: wherein the means for receiving, in the first wireless device, the signal via asynchronous communications in the spectrum comprises: means for receiving a signal from a second device wireless communicating asynchronously across the spectrum; wherein the means for filtering the received signal to reduce interference from other asynchronous communications in the spectrum comprises: means for demodulating and filtering the received signal to obtain a user signal on a preselected subcarrier, thereby reducing interference from of other wireless devices communicating asynchronously across the spectrum; and wherein the means for retrieving user data from the filtered signal comprises: means for applying frequency domain equalization to a processed signal derived from the user signal, thereby generating a plurality of equalized symbols; and means for retrieving user data from the equalized symbols.
[34]
The wireless communication device of claim 33, further comprising: means for removing a cyclic prefix from the user signal before applying frequency domain equalization.
[35]
35. Wireless communication device, comprising:
at least one processor; a memory communicatively coupled to the at least one processor; and a communication interface communicatively coupled to the at least one processor, wherein the at least one processor is configured to: receive, at a first wireless device, a signal via asynchronous communications on a spectrum; filter the received signal to reduce interference from other asynchronous communications in the spectrum; and retrieve user data from the filtered signal.
[36]
A wireless communication device as claimed in claim 35, wherein the at least one processor is further configured to: receive the signal from a second wireless device in a division multiple access communication system; orthogonal frequency (OFDMA); filter the received signal to reduce interference from other asynchronous communications in the OFDMA system; and applying OFDMA demodulation to the received signal to generate a plurality of frequency domain outputs; and applying frequency domain equalization to the frequency domain outputs to retrieve a plurality of user tones from the second wireless device.
[37]
The wireless communication device of claim 36, wherein the at least one processor is further configured to:
filter the received signal using a weighted addition and superposition filter.
[38]
The wireless communication device of claim 37, wherein the at least one processor is further configured to: copy and weight a final portion of an input symbol in the received signal and append the final portion of the input symbol at a start of the input symbol.
[39]
The wireless communication device of claim 37, wherein the at least one processor is further configured to: copy and weight an initial portion of an input symbol in the received signal and append the initial portion of the input symbol to an end of the input symbol.
[40]
The wireless communication device of claim 35, wherein the at least one processor is further configured to: receive a signal from a second wireless device communicating asynchronously in the spectrum; demodulate and filter the received signal to obtain a user signal on a pre-selected subcarrier, thus reducing interference from other wireless devices communicating asynchronously in the spectrum; and applying frequency domain equalization to a processed signal derived from the user signal, thereby generating a plurality of equalized symbols; and retrieve user data from the equalized symbols.
[41]
The wireless communication device of claim 40, wherein the at least one processor is further configured to: remove a cyclic prefix from the user signal before applying frequency domain equalization.
[42]
42. A non-transient computer-readable medium storing computer-executable code, comprising code for: receiving, at a first wireless device, a signal via asynchronous communications on a spectrum; filter the received signal to reduce interference from other asynchronous communications in the spectrum; and retrieve user data from the filtered signal.
[43]
The computer readable medium of claim 42, further comprising code for: receiving the signal from a second wireless device in an orthogonal frequency division multiple access (OFDMA) communication system; filter the received signal to reduce interference from other asynchronous communications in the OFDMA system; and applying OFDMA demodulation to the received signal to generate a plurality of frequency domain outputs; and applying frequency domain equalization to the frequency domain outputs to retrieve a plurality of user tones from the second wireless device.
[44]
A computer readable medium according to claim 43, further comprising code for: filtering the received signal using a weighted addition and superposition filter.
[45]
A computer readable medium according to claim 44, further comprising code for: copying and weighting a trailing portion of an input symbol in the received signal and appending the trailing portion of the input symbol to a start of the input symbol.
[46]
A computer readable medium according to claim 44, further comprising code for: copying and weighting a leading portion of an input symbol in the received signal and appending the leading portion of the input symbol to an end of the input symbol.
[47]
The computer readable medium of claim 42, further comprising code for: receiving a signal from a second wireless device communicating asynchronously in the spectrum; demodulate and filter the received signal to obtain a user signal on a pre-selected subcarrier, thus reducing interference from other wireless devices communicating asynchronously in the spectrum; and applying frequency domain equalization to a processed signal derived from the user signal, thereby generating a plurality of equalized symbols; and retrieve user data from the equalized symbols.
[48]
A computer readable medium according to claim 47, further comprising code for: removing a cyclic prefix from the user signal before applying frequency domain equalization.
[49]
49. Wireless communication method, comprising:
provide pre-selected bandwidth for communications on a wireless network; provisioning a first portion of the preselected bandwidth for synchronous communications on the wireless network; and provisioning, based on a demand for traffic on the wireless network, a second portion of the pre-selected bandwidth for asynchronous communications on the wireless network.
[50]
The method of claim 49, wherein the traffic demand comprises a predicted traffic demand.
[51]
The method of claim 49, wherein the traffic demand comprises a real-time traffic demand.
[52]
The method of claim 49, wherein the traffic demand comprises a predicted traffic demand and a real-time traffic demand.
[53]
A method as claimed in claim 49, further comprising: retrieving signals from two pre-selected wireless devices communicating asynchronously wherein the retrieval of signals utilizes code division multiple access across two wireless devices. wire, pre-selected.
[54]
54. A wireless communication device, comprising: means for providing a pre-selected bandwidth for communications on a wireless network; means for provisioning a first portion of the preselected bandwidth for synchronous communications on the wireless network; and means for provisioning, based on a demand for traffic on the wireless network, a second portion of the preselected bandwidth for asynchronous communications on the wireless network.
[55]
A wireless communication device according to claim 54, wherein the traffic demand comprises a predicted traffic demand.
[56]
A wireless communication device as claimed in claim 54, wherein the traffic demand comprises a real-time traffic demand.
[57]
A wireless communication device according to claim 54, wherein the traffic demand comprises a predicted traffic demand and a real-time traffic demand.
[58]
A wireless communication device as claimed in claim 54, further comprising: means for retrieving signals from two pre-selected wireless devices communicating asynchronously wherein the means for retrieving the signals utilizes multiple access code splitting via two pre-selected wireless devices.
[59]
59. Wireless communication device, comprising: at least one processor; a memory communicatively coupled to the at least one processor; and a communication interface communicatively coupled to the at least one processor, wherein the at least one processor is configured to: provide a preselected bandwidth for communications over a wireless network; provisioning a first portion of the preselected bandwidth for synchronous communications on the wireless network; and provisioning, based on a demand for traffic on the wireless network, a second portion of the pre-selected bandwidth for asynchronous communications on the wireless network.
[60]
The wireless communication device of claim 59, wherein the traffic demand comprises a predicted traffic demand.
[61]
The wireless communication device of claim 59, wherein the traffic demand comprises a real-time traffic demand.
[62]
The wireless communication device of claim 59, wherein the traffic demand comprises a predicted traffic demand and a real-time traffic demand.
[63]
A wireless communication device as claimed in claim 59, wherein the at least one processor is further configured to: retrieve signals from two pre-selected wireless devices communicating asynchronously wherein retrieval of signals uses code division multiple access via two pre-selected wireless devices.
[64]
64. Non-transient computer readable medium storing computer executable code, comprising code for: providing a preselected bandwidth for communications over a wireless network; provisioning a first portion of the preselected bandwidth for synchronous communications on the wireless network; and provisioning, based on a demand for traffic on the wireless network, a second portion of the pre-selected bandwidth for asynchronous communications on the wireless network.
[65]
A computer readable medium as claimed in claim 64 comprising a predicted traffic demand.
[66]
A computer readable medium as claimed in claim 64 comprising a real-time traffic demand.
[67]
67. Computer readable medium comprising a predicted traffic demand and a real-time traffic demand.
[68]
A computer readable medium as claimed in claim 64, further comprising code for: retrieving signals from two pre-selected wireless devices that communicate asynchronously, wherein retrieval of signals utilizes division multiple access code via two pre-selected wireless devices.

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法律状态:
2020-09-15| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|

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2020-09-15| B15K| Others concerning applications: alteration of classification|Free format text: AS CLASSIFICACOES ANTERIORES ERAM: H04L 25/03 , H04L 27/26 , H04J 11/00 , H04W 28/20 Ipc: H04L 25/03 (2006.01), H04L 27/26 (2006.01), H04J 1 |

优先权:

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申请号 | 申请日 | 专利标题

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US201462004337P| true| 2014-05-29|2014-05-29|

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US62/004,337|2014-05-29|

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US14/574,149|2014-12-17|

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US14/574,149|US10003480B2|2014-05-29|2014-12-17|Asynchronous multicarrier communications|

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PCT/US2015/030423|WO2015183549A2|2014-05-29|2015-05-12|Asynchronous multicarrier communications|

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