Wireless communication method and wireless device therefor

Abstract

M A group of wireless devices receives a first time-domain signal in a first frequency band through each receiving antenna of each wireless device. The first time-domain signal includes signals corresponding to a first subcarrier spacing. K Each first OFDM symbol represents a first subcarrier spacing. N 1 On each subcarrier N 1 A set of modulation symbols. Each wireless device generates a second time-domain signal that occupies a second time interval and corresponds to the first time-domain signal. K The second OFDM symbol in the first j The second OFDM symbol indicates the use of the second subcarrier spacing. N 2 On each subcarrier N 2 A set of modulation symbols, wherein N 2 The set of modulation symbols is derived from... K The first OFDM symbol in the first OFDM symbol j The first OFDM symbol represents N 1 The signal is derived from a set of modulation symbols. Each second time-domain signal is transmitted via the transmit antenna of each wireless device in the second frequency band.

Description

Technical Field

[0001] This disclosure relates generally to communication systems, and more specifically to techniques for forming distributed MIMO receivers. Background Technology

[0002] The statements in this section are provided only as background information in connection with this disclosure and may not constitute prior art.

[0003] Wireless communication systems are widely deployed to provide a variety of telecommunications services, such as telephone, video, data, messaging, and broadcasting. Typical wireless communication systems may employ multiple access technologies capable of supporting communication with multiple users by sharing available system resources. Examples of such multiple access technologies include Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single Carrier Frequency Division Multiple Access (SC-FDMA) systems, and Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems.

[0004] These multiple access technologies have been adopted in various telecommunications standards to provide a common protocol enabling different wireless devices to communicate at the city, national, regional, and even global levels. An example telecommunications standard is 5G New Radio (NR). 5G NR is part of the Continuous Mobile Broadband Evolution program released by the 3rd Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., via the Internet of Things (IoT)), and other requirements. Some aspects of 5G NR can be based on the 4G Long Term Evolution (LTE) standard. 5G NR technology still requires further improvement. These improvements can also be applied to other multiple access technologies and telecommunications standards that adopt them. Summary of the Invention

[0005] The following presents a brief overview of one or more aspects to provide a basic understanding of these aspects. This invention is not a comprehensive overview of all conceived aspects, nor is it intended to identify all important or key elements of all aspects, nor to depict the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that follows.

[0006] In one aspect of this disclosure, a method, a computer-readable medium, and a wireless device are provided. The method includes operation on a first frequency band and via... M At least one wireless device in the group of wireless devices receives a first time-domain signal occupying a first time interval via each receiving antenna, wherein the first time-domain signal includes a first subcarrier interval. KEach first OFDM symbol represents a first OFDM symbol using the first subcarrier spacing. N 1 On each subcarrier N 1 A set of modulation symbols, wherein, M , K and N 1 All are positive integers; a second time-domain signal is generated at the at least one wireless device, occupying the second time interval and corresponding to the first time-domain signal, wherein the second time-domain signal includes a value corresponding to the second subcarrier interval. K Each second OFDM symbol represents a second OFDM symbol using the second subcarrier spacing. N 2 On each subcarrier N 2 A set of modulation symbols, wherein K The second OFDM symbol in the first j The second OFDM symbol represents N 2 The set of modulation symbols is derived from the... K The first OFDM symbol in the first OFDM symbol j The first OFDM symbol represents N 1 Derived from a set of modulation symbols, where, N 2 It is a positive integer, and j It is 1 and K Integers between 1 and 2, including 1 and 2 K ; and transmit the second time-domain signal via the transmitting antenna of the at least one wireless device in the second frequency band.

[0007] In one embodiment, the wireless device is included in a group comprising M wireless devices, each wireless device including a memory, at least one receiving antenna, at least one transmitting antenna, and at least one processor. The at least one processor is coupled to the memory and configured to: receive, on a first frequency band, each receiving antenna of the wireless device respectively occupying a first time interval, wherein the first time-domain signal includes a first subcarrier interval. K Each first OFDM symbol represents a first OFDM symbol using the first subcarrier spacing. N 1 On each subcarrier N 1 A set of modulation symbols, wherein, M , K and N1 All are positive integers; a second time-domain signal is generated at the wireless device, occupying the second time interval and corresponding to the first time-domain signal, wherein the second time-domain signal includes a value corresponding to the second subcarrier interval. K Each second OFDM symbol represents a second OFDM symbol using the second subcarrier spacing. N 2 On each subcarrier N 2 A set of modulation symbols, wherein K The second OFDM symbol in the first j The second OFDM symbol represents N 2 The set of modulation symbols is derived from the... K The first OFDM symbol in the first OFDM symbol j The first OFDM symbol represents the N 1 Derived from a set of modulation symbols, where, N 2 It is a positive integer, and j It is 1 and K Integers between 1 and 2, including 1 and 2 K ; and transmit the second time-domain signal via the transmitting antenna of the wireless device in the second frequency band.

[0008] This invention achieves the technical effect of improving frequency utilization.

[0009] For the purposes of the preamble and related, one or more aspects include the features fully described below and particularly pointed out in the claims. The following description and drawings illustrate certain exemplary features of one or more aspects in detail. However, these features indicate only a few of the various ways in which the principles of each aspect can be employed, and this specification is intended to include all such aspects and their equivalents. Attached Figure Description

[0010] Figure 1 This is a schematic diagram illustrating an example of a wireless communication system and an access network.

[0011] Figure 2 This is a schematic diagram showing a base station communicating with a UE in an access network.

[0012] Figure 3 An example logical architecture for a distributed access network is shown.

[0013] Figure 4 An example physical architecture of a distributed access network is shown.

[0014] Figure 5This is a schematic diagram illustrating an example of a time slot centered on DL.

[0015] Figure 6 This is a schematic diagram illustrating an example of a time slot centered on UL.

[0016] Figure 7 This is a schematic diagram illustrating downlink MIMO transmission from a base station to a UE via one or more repeaters.

[0017] Figure 8 This is a schematic diagram showing the generation of RF signals at the base station.

[0018] Figure 9 This is a schematic diagram illustrating the downlink transmission timing from the base station to the UE via one or more repeaters.

[0019] Figure 10 This is a schematic diagram showing the signal transformation at the repeater.

[0020] Figure 11 It is a flowchart of a method (process) for transforming and forwarding wireless signals. Detailed Implementation

[0021] The specific embodiments described below with reference to the accompanying drawings are intended as a description of various configurations and are not intended to represent the only configuration in which the concepts described herein can be practiced. Specific details are included in the specific embodiments for the purpose of providing a thorough understanding of the various concepts. However, it will be apparent to those skilled in the art that these concepts can be practiced without these specific details. In some cases, well-known structures and components are shown in block diagram form to avoid obscuring these concepts.

[0022] Various apparatuses and methods will now be used to present several aspects of a telecommunications system. These apparatuses and methods will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively, “elements”). These elements may be implemented using electronic hardware, computer software, or any combination thereof. Whether these elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the system as a whole.

[0023] For example, an element, any part of an element, or any combination of elements can be implemented as a “processing system” including one or more processors. Examples of processors include microprocessors, microcontrollers, graphics processing units (GPUs), central processing units (CPUs), application processors, digital signal processors (DSPs), reduced instruction set computing (RISC) processors, system-on-a-chip (SoCs), baseband processors, field-programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to perform the various functions described throughout this disclosure. One or more processors in the processing system can execute software. Whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise, software should be interpreted broadly as meaning instructions, instruction sets, code, code segments, program code, programs, subroutines, software components, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, processes, functions, etc.

[0024] Therefore, in one or more examples, the described functionality can be implemented in hardware, software, or any combination thereof. If implemented in software, the functionality can be stored on or encoded as one or more instructions or codes on a computer-readable medium. Computer-readable media includes computer storage media. Storage media can be any available medium accessible to a computer. By way of example, and not limitation, such computer-readable media can include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), optical disc storage, magnetic disk storage, other magnetic storage devices, combinations of computer-readable media of the foregoing types, or any other medium that can be used to store computer-executable code in the form of computer-accessible instructions or data structures.

[0025] Figure 1 This is a schematic diagram illustrating an example of a wireless communication system and access network 100. The wireless communication system (also known as a wireless wide area network (WWAN)) includes a base station 102, a user interface unit (UE) 104, an evolved packet core (EPC) 160, and another core network 190 (e.g., a 5G core (5GC)). The base station 102 may include macro cells (high-power cellular base stations) and / or small cells (low-power cellular base stations). Macro cells include base stations. Small cells include femtocells, picocells, and microcells.

[0026] Base station 102 configured for 4G LTE (collectively referred to as Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) can be connected to EPC 160 interface via backhaul link 132 (e.g., SI interface). Base station 102 configured for 5G NR (collectively referred to as Next Generation RAN (NG-RAN)) can be connected to core network 190 interface via backhaul link 184. Among other functions, base station 102 can also perform one or more of the following functions: transmission of user data, radio channel encryption and decryption, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection establishment and release, load balancing, distribution of non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS), user and equipment tracking, RAN information management (RIM), paging, location, and warning message delivery. Base stations 102 can communicate with each other directly or indirectly (e.g., via EPC 160 or core network 190) via backhaul link 134 (e.g., X2 interface). Backhaul link 134 can be wired or wireless.

[0027] Base station 102 can wirelessly communicate with UE 104. Each base station 102 can provide communication coverage for a corresponding geographic coverage area 110. Overlapping geographic coverage areas 110 may exist. For example, a small cell 102' may have a coverage area 110' that overlaps with the coverage areas 110 of one or more macro base stations 102. A network that includes both small cells and macro cells can be referred to as a heterogeneous network. The heterogeneous network may also include a Home Evolution Node B (eNB) (HeNB), which can provide services to a restricted group referred to as a Closed Subscriber Group (CSG). The communication link 120 between base station 102 and UE 104 may include uplink (UL) (also known as reverse link) transmission from UE 104 to base station 102 and / or downlink (DL) (also known as forward link) transmission from base station 102 to UE 104. The communication link 120 may use multiple-input multiple-output (MIMO) antenna technologies, including spatial multiplexing, beamforming, and / or transmit diversity. The communication link may use one or more carriers. Base station 102 / UE 104 may use spectrum with a bandwidth of up to X MHz (e.g., 5 MHz, 10 MHz, 15 MHz, 20 MHz, 100 MHz, 400 MHz, etc.) allocated for each carrier in a total of Yx MHz (x component carriers) for transmission in each direction. Carriers may be adjacent to each other or may not be adjacent to each other. Carrier allocation may be asymmetric relative to DL and UL (e.g., more or fewer carriers may be allocated to DL than to UL). Component carriers may include a primary component carrier and one or more secondary component carriers. The primary component carrier may be referred to as the primary cell (PCell), and the secondary component carriers may be referred to as secondary cells (SCells).

[0028] Some UEs 104 can communicate with each other using device-to-device (D2D) communication link 158. D2D communication link 158 can use DL / UL WWAN spectrum. D2D communication link 158 can use one or more sidelink channels, such as Physical Sidelink Broadcast Channel (PSBCH), Physical Sidelink Discovery Channel (PSDCH), Physical Sidelink Shared Channel (PSSCH), and Physical Sidelink Control Channel (PSCCH). D2D communication can be conducted through various wireless D2D communication systems, such as FlashLinQ, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the IEEE 802.11 standard, LTE, or NR.

[0029] The wireless communication system may also include a Wi-Fi access point (AP) 150 that communicates with a Wi-Fi station (STA) 152 via a communication link 154 in the 5 GHz unlicensed spectrum. When communicating in the unlicensed spectrum, the STA 152 / AP 150 may perform a free channel assessment (CCA) to determine whether the channel is available before communication.

[0030] Small cell 102' can operate in licensed and / or unlicensed spectrum. When operating in unlicensed spectrum, small cell 102' can employ NR and use the same 5 GHz unlicensed spectrum as Wi-Fi AP 150. Small cell 102' employing NR in unlicensed spectrum can improve coverage of the access network and / or increase the capacity of the access network.

[0031] Base station 102 (whether it is a small cell 102' or a large cell (e.g., a macro base station)) may include an eNB, a gNodeB (gNB), or another type of base station. Some base stations (such as gNB 180) may operate in the conventional sub-6 GHz spectrum, millimeter wave (mmW) frequencies, and / or near-mmW frequencies for communication with UE 104. When gNB 180 operates at mmW or near-mmW frequencies, gNB180 may be referred to as an mmW base station. Extremely high frequency (EHF) is a portion of the RF spectrum in the electromagnetic spectrum. The EHF range is from 30 GHz to 300 GHz with wavelengths between 1 mm and 10 mm. Radio waves in this band may be referred to as millimeter waves. Near-mmW can extend down to frequencies of 3 GHz with wavelengths of 100 mm. Ultra-high frequency (SHF) bands extend between 3 GHz and 30 GHz and are also known as centimeter waves. Communication using mmW / near-mmW RF bands (e.g., 3 GHz–300 GHz) has extremely high path loss and short coverage. The mmW base station 180 can utilize beamforming 182 with the UE 104 to compensate for extremely high path loss and short coverage.

[0032] Base station 180 may transmit beamforming signals to UE 104 in one or more transmit directions 108a. UE 104 may receive beamforming signals from base station 180 in one or more receive directions 108b. UE 104 may also transmit beamforming signals to base station 180 in one or more transmit directions. Base station 106 may transmit beamforming signals with UE 104 in one or more beam directions (e.g., 108c, 108c'). Base station 180 may receive beamforming signals from UE 104 in one or more receive directions. Base station 180 / UE 104 may perform beamforming training to determine the optimal receive and transmit directions for each of base station 180 / UE 104. The transmit and receive directions of base station 180 may be the same or different. The transmit and receive directions of UE 104 may be the same or different.

[0033] EPC 160 may include Mobility Management Entity (MME) 162, other MMEs 164, Serving Gateway 166, Multimedia Broadcast Multicast Service (MBMS) Gateway 168, Broadcast Multicast Service Center (BM-SC) 170, and Packet Data Network (PDN) Gateway 172. MME 162 can communicate with Home Subscriber Server (HSS) 174. MME 162 is the control node that handles signaling between UE 104 and EPC 160. Typically, MME 162 provides bearer and connection management. All user Internet Protocol (IP) packets are transmitted through Serving Gateway 166, which is itself connected to PDN Gateway 172. PDN Gateway 172 provides UE IP address allocation and other functions. PDN Gateway 172 and BM-SC 170 are connected to IP Service 176. IP Service 176 may include the Internet, intranet, IP Multimedia Subsystem (IMS), PS streaming service, and / or other IP services. The BM-SC 170 provides functionality for MBMS user service provisioning and delivery. It can serve as an entry point for content provider MBMS transmissions, authorize and initiate MBMS bearer services within a Public Land Mobile Network (PLMN), and schedule MBMS transmissions. The MBMS gateway 168 can distribute MBMS services to base stations 102 belonging to Multicast-Broadcast Single Frequency Network (MBSFN) areas belonging to broadcast-specific services, and can be responsible for session management (start / stop) and collecting billing information related to eMBMS.

[0034] The core network 190 may include Access and Mobility Management Functions (AMF) 192, other AMFs 193, Location Management Functions (LMF) 198, Session Management Functions (SMF) 194, and User Plane Functions (UPF) 195. AMF 192 can communicate with Unified Data Management (UDM) 196. AMF 192 is the control node that handles signaling between UE 104 and the core network 190. Typically, SMF 194 provides QoS flow and session management. All user Internet Protocol (IP) packets are transmitted through UPF 195. UPF 195 provides UE IP address allocation and other functions. UPF 195 connects to IP services 197. IP services 197 may include the Internet, intranet, IP Multimedia Subsystem (IMS), PS streaming services, and / or other IP services.

[0035] The base station may also be referred to as gNB, Node B, Evolved Node B (eNB), access point, base transceiver station, radio base station, radio transceiver, transceiver function, Basic Services Set (BSS), Extended Services Set (ESS), Transmitter Receiver Point (TRP), or any other suitable term. Base station 102 provides UE 104 with access to EPC 160 or core network 190. Examples of UE 104 include cellular phones, smartphones, Session Initiation Protocol (SIP) phones, laptops, personal digital assistants (PDAs), satellite radios, GPS devices, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, tablets, smart devices, wearable devices, vehicles, meters, air pumps, large or small kitchen appliances, healthcare devices, implants, sensors / actuators, displays, or any other similarly functional devices. Some of UE 104 may be referred to as IoT devices (e.g., parking timers, air pumps, ovens, vehicles, heart monitors, etc.). UE 104 may also be referred to as a station, mobile station, user station, mobile unit, user unit, radio unit, remote unit, mobile device, radio device, wireless communication device, remote device, mobile user station, access terminal, mobile terminal, radio terminal, remote terminal, handheld device, user agent, mobile client, client, or any other suitable term.

[0036] Although this disclosure may refer to 5G New Radio (NR), it may be applied to other similar fields such as LTE, Advanced LTE (LTE-A), Code Division Multiple Access (CDMA), Global System for Mobile Communications (GSM) or other wireless / radio access technologies.

[0037] Figure 2This is a block diagram of base station 210 communicating with UE 250 in the access network. In the DL, IP packets from EPC 160 can be provided to controller / processor 275. Controller / processor 275 implements Layer 3 and Layer 2 functions. Layer 3 includes the Radio Resource Control (RRC) layer, and Layer 2 includes the Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer, and Media Access Control (MAC) layer. The controller / processor 275 provides RRC layer functions associated with broadcasting system information (e.g., MIB, SIB), RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release), inter-Radio Access Technology (RAT) mobility, and measurement configuration for UE measurement reporting; PDCP layer functions associated with header compression / decompression, security (encryption, decryption, integrity protection, integrity verification), and handover support functions; RLC layer functions associated with transmission of upper-layer packet data units (PDUs), error correction via ARQ, concatenation, segmentation, and reassembly of RLC service data units (SDUs), resegmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functions associated with mapping between logical channels and transport channels, multiplexing MAC SDUs onto transport blocks (TBs), demultiplexing MAC SDUs from TBs, scheduling information reporting, error correction via HARQ, priority processing, and logical channel priority ordering.

[0038] Transmit (TX) processor 216 and receive (RX) processor 270 implement Layer 1 functions associated with various signal processing functions. Layer 1, including the physical (PHY) layer, may include error detection on the transport channel, forward error correction (FEC) encoding / decoding of the transport channel, interleaving, rate matching, mapping to the physical channel, modulation / demodulation of the physical channel, and MIMO antenna processing. TX processor 216 processes the mapping to the signal constellation based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-phase shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM)). The encoded and modulated symbols can then be split into parallel streams. Each stream can then be mapped to OFDM subcarriers, multiplexed with a reference signal (e.g., a pilot) in the time and / or frequency domains, and subsequently combined using inverse fast Fourier transform (IFFT) to produce a physical channel carrying a stream of time-domain OFDM symbols. The OFDM streams are spatially precoded to produce multiple spatial streams. The channel estimate from channel estimator 274 can be used to determine coding and modulation schemes, as well as for spatial processing. The channel estimate can be derived from reference signals and / or channel state feedback transmitted by UE 250. Each spatial stream can then be provided to a different antenna 220 via a separate transmitter 218TX. Each transmitter 218TX can use its respective spatial stream to modulate an RF carrier for transmission.

[0039] At UE 250, each receiver 254RX receives signals through its respective antenna 252. Each receiver 254RX recovers the information modulated onto the RF carrier and provides this information to the receive (RX) processor 256. The TX processor 268 and RX processor 256 implement Layer 1 functions associated with various signal processing functions. The RX processor 256 can perform spatial processing on the information to recover any spatial streams destined for UE 250. If multiple spatial streams are destined for UE 250, they can be combined by the RX processor 256 into a single OFDM symbol stream. The RX processor 256 then uses a Fast Fourier Transform (FFT) to transform the OFDM symbol stream from the time domain to the frequency domain. The frequency domain signal includes a separate OFDM symbol stream for each subcarrier of the OFDM signal. The reference signal and the symbols on each subcarrier are recovered and demodulated by determining the most probable signal constellation points transmitted by base station 210. These soft decisions can be based on channel estimates calculated by channel estimator 258. The soft decision is then decoded and deinterleaved to recover the data and control signals originally transmitted by base station 210 on the physical channel. The data and control signals are then provided to controller / processor 259, which implements layer 3 and layer 2 functions.

[0040] Controller / processor 259 may be associated with memory 260, which stores program code and data. Memory 260 may be referred to as a computer-readable medium. In UL, controller / processor 259 provides demultiplexing, packet reassembly, decryption, header decompression, and control signal processing between transport and logical channels to recover IP packets from EPC 160. Controller / processor 259 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operation.

[0041] Similar to the functions described in conjunction with DL transmission via base station 210, controller / processor 259 provides RRC layer functions associated with system information (e.g., MIB, SIB) acquisition, RRC connectivity, and measurement reporting; PDCP layer functions associated with header compression / decompression and security (encryption, decryption, integrity protection, integrity verification); RLC layer functions associated with transmission of upper-layer PDUs, error correction via ARQ, concatenation, segmentation and reassembly of RLC SDUs, resegmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functions associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs to TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction via HARQ, priority processing, and logical channel priority ordering.

[0042] The TX processor 268 can use the channel estimate derived by the channel estimator 258 from the reference signal or feedback transmitted by the base station 210 to select an appropriate coding scheme and modulation scheme, and facilitate spatial processing. The spatial stream generated by the TX processor 268 can be provided to different antennas 252 via separate transmitters 254TX. Each transmitter 254TX can use its own spatial stream to modulate an RF carrier for transmission. UL transmission is processed at the base station 210 in a manner similar to that described in conjunction with the receiver functionality at the UE 250. Each receiver 218RX receives a signal via its own antenna 220. Each receiver 218RX recovers the information modulated onto the RF carrier and provides this information to the RX processor 270.

[0043] Controller / processor 275 may be associated with memory 276, which stores program code and data. Memory 276 may be referred to as computer-readable medium. In the UL, controller / processor 275 provides demultiplexing, packet reassembly, decryption, header decompression, and control signal processing between transport and logical channels to recover IP packets from UE 250. IP packets from controller / processor 275 may be provided to EPC 160. Controller / processor 275 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operation.

[0044] New radio (NR) can refer to a radio configured to operate under a new air interface (e.g., different from an air interface based on Orthogonal Frequency Division Multiple Access (OFDMA)) or a fixed transport layer (e.g., different from Internet Protocol (IP)). NR can utilize OFDM with a cyclic prefix (CP) on both the uplink and downlink, and can include support for half-duplex operation using Time Division Duplex (TDD). NR can include enhanced mobile broadband (eMBB) services targeting wide bandwidth (e.g., exceeding 80 MHz), millimeter wave (mmW) services targeting high carrier frequencies (e.g., 60 GHz), massive MTC (mMTC) services targeting non-backward-compatible MTC technologies, and / or mission-critical services targeting ultra-reliable low-latency communication (URLLC).

[0045] It can support a single component carrier bandwidth of 100 MHz. In one example, an NR resource block (RB) can span 12 subcarriers per RB, with a subcarrier spacing (SCS) of 60 kHz for a duration of 0.25 ms or a SCS of 30 kHz for a duration of 0.5 ms (similarly, a SCS of 15 kHz for a duration of 1 ms). Each radio frame can consist of 10 subframes (10, 20, 40, or 80 NR slots) of 10 ms in length. Each slot can indicate the link direction for data transmission (i.e., downlink or uplink), and the link direction of each slot can be dynamically switched. Each slot can include DL / UL data and DL / UL control data. The UL slots and DL slots used for NR can be as follows: Figure 5 and Figure 6 To describe in more detail.

[0046] NR RAN can include a Central Unit (CU) and a Distributed Unit (DU). NR BS (e.g., gNB, 5G Node B, Node B, Transmit / Receive Point (TRP), Access Point (AP)) can correspond to one or more BSs. NR cells can be configured as Access Cells (ACells) or Data-Only Cells (DCells). For example, the RAN (e.g., a Central Unit or a Distributed Unit) can configure cells. DCells can be cells used for carrier aggregation or dual connectivity and may not be used for initial access, cell selection / reselection, or handover. In some cases, DCells may not transmit synchronization signals (SS), and in others, they may transmit SS. NR BSs can transmit downlink signals indicating the cell type to the UE. Based on the cell type indication, the UE can communicate with the NRBS. For example, the UE can determine which NR BS to consider for cell selection, access, handover, and / or measurement based on the indicated cell type.

[0047] Figure 3 An example logical architecture of a distributed RAN 300 according to various aspects of this disclosure is shown. A 5G access node 306 may include an access node controller (ANC) 302. The ANC may be the central unit (CU) of the distributed RAN. The backhaul interface to the next-generation core network (NG-CN) 304 may terminate at the ANC. The backhaul interface to the adjacent next-generation access node (NG-AN) 310 may terminate at the ANC. The ANC may be associated with one or more TRPs 308 (which may also be referred to as BS, NR BS, Node B, 5G NB, AP, or some other term) via the F1 control plan protocol (F1-C) / F1 user plan protocol (F1-U). As mentioned above, TRP can be used interchangeably with "cell".

[0048] TRP 308 can be a distributed unit (DU). A TRP can be connected to one ANC (ANC 302) or more ANCs (not shown). For example, for RAN sharing, Radio as a Service (RaaS), and service-specific ANC deployments, a TRP can be connected to more than one ANC. A TRP can include one or more antenna ports. A TRP can be configured to serve the UE's services individually (e.g., dynamically selected) or jointly (e.g., jointly transmitted).

[0049] The local architecture of the distributed RAN 300 can be used to illustrate fronthaul definitions. Architectures supporting fronthaul solutions across different deployment types can be defined. For example, the architecture can be based on transport network capabilities (e.g., bandwidth, latency, and / or jitter). The architecture can share features and / or components with LTE. Depending on various aspects, the next-generation AN (NG-AN) 310 can support dual connectivity with NR. The NG-AN can share common fronthaul for both LTE and NR.

[0050] This architecture enables collaboration between or between TRP 308s. For example, collaboration can be pre-configured within a TRP and / or across TRPs via ANC 302. Depending on the circumstances, inter-TRP interfaces may not be required or may not exist.

[0051] Depending on various factors, the dynamic configuration of split logical functions can exist within the architecture of the distributed RAN 300. PDCP, RLC, and MAC protocols can be adaptively placed at the ANC or TRP.

[0052] Figure 4An example physical architecture of a distributed RAN 400 according to various aspects of this disclosure is shown. A centralized core network unit (C-CU) 402 can host core network functions. The C-CU can be centrally deployed. To handle peak capacity, C-CU functions can be offloaded (e.g., offloaded to Advanced Wireless Services (AWS)). A centralized RAN unit (C-RU) 404 can host one or more ANC functions. Optionally, the C-RU can host core network functions locally. The C-RU can have a distributed deployment. The C-RU can be located closer to the network edge. A distributed unit (DU) 406 can host one or more TRPs. The DU can be located at the edge of a network with radio frequency (RF) capabilities.

[0053] Figure 5 This is a schematic diagram 500 illustrating an example of a DL-centered time slot. The DL-centered time slot may include a control section 502. The control section 502 may exist in the initial or beginning portion of the DL-centered time slot. The control section 502 may include various scheduling and / or control information corresponding to the various portions of the DL-centered time slot. In some configurations, such as... Figure 5 As indicated, control portion 502 may be a physical DL control channel (PDCCH). The DL-centric time slot may also include a DL data portion 504. DL data portion 504 may sometimes be referred to as the payload of the DL-centric time slot. DL data portion 504 may include communication resources for transmitting DL data from a scheduling entity (e.g., UE or BS) to a subordinate entity (e.g., UE). In some configurations, DL data portion 504 may be a physical DL shared channel (PDSCH).

[0054] The DL-centered time slot may also include a shared UL portion 506. The shared UL portion 506 may sometimes be referred to as a UL burst, a shared UL burst, and / or various other suitable terms. The shared UL portion 506 may include feedback information corresponding to various other portions of the DL-centered time slot. For example, the shared UL portion 506 may include feedback information corresponding to the control portion 502. Non-limiting examples of feedback information may include ACK signals, NACK signals, HARQ indicators, and / or various other suitable types of information. The shared UL portion 506 may include additional or alternative information, such as information relating to the Random Access Channel (RACH) process, scheduling requests (SR), and various other suitable types of information.

[0055] like Figure 5As illustrated herein, the end of the DL data portion 504 can be separated from the beginning of the common UL portion 506 in time. This time separation may sometimes be referred to as a gap, protection period, protection interval, and / or various other suitable terms. This separation provides time for switching from DL communication (e.g., reception operation of a subordinate entity (e.g., UE)) to UL communication (e.g., transmission of a subordinate entity (e.g., UE)). Those skilled in the art will understand that the foregoing is merely one example of a DL-centric time slot, and alternative structures with similar characteristics may exist without departing from the aspects described herein.

[0056] Figure 6 This is a schematic diagram 600 illustrating an example of a UL-centered time slot. The UL-centered time slot may include a control section 602. The control section 602 may be present in the initial or beginning portion of the UL-centered time slot. Figure 6 The control section 602 in the reference above can be similar to the one mentioned above. Figure 5 The control portion 502 is described. The UL-centric time slot may also include a UL data portion 604. The UL data portion 604 may sometimes be referred to as the payload of the UL-centric time slot. The UL portion may refer to the communication resources used to transmit UL data from a subordinate entity (e.g., a UE) to a scheduling entity (e.g., a UE or a BS). In some configurations, the control portion 602 may be a physical DL control channel (PDCCH).

[0057] like Figure 6 As illustrated, the end of control section 602 can be separated from the start of UL data section 604 in time. This time separation may sometimes be referred to as a gap, protection cycle, protection interval, and / or various other suitable terms. This separation provides time for switching from DL communication (e.g., receiving operations of a scheduling entity) to UL communication (e.g., transmissions of a scheduling entity). UL-centric time slots may also include a shared UL section 606. Figure 6 The common UL part 606 in the above reference can be similar to the above reference. Figure 5 The common UL portion 506 is described. The common UL portion 606 may additionally or alternatively include information relating to the Channel Quality Indicator (CQI), the Sound Reference Signal (SRS), and various other suitable types of information. Those skilled in the art will understand that the foregoing is merely one example of a UL-centric time slot, and that alternative structures with similar characteristics may exist without departing from the aspects described herein.

[0058] In some scenarios, two or more dependent entities (e.g., UEs) may use sidelink signaling to communicate with each other. Real-world applications of such sidelink communication can include shared security, proximity services, UE-to-network relay, vehicle-to-vehicle (V2V) communication, Internet of Things (IoE) communication, IoT communication, mission-critical meshes, and / or various other suitable applications. Typically, sidelink signaling can refer to a signal transmitted from one dependent entity (e.g., UE1) to another dependent entity (e.g., UE2) without relaying the communication through a scheduling entity (e.g., UE or BS), even if the scheduling entity may be used for scheduling and / or control purposes. In some examples, sidelink signaling may be transmitted using licensed spectrum (unlike wireless LANs that typically use unlicensed spectrum).

[0059] Figure 7 This is a schematic diagram 700 illustrating downlink MIMO transmission from a base station to a UE via one or more repeaters. In this example, base station 702 has eight antennas 710-1, 710-2, ... 710-8, and UE 704 has two receive antennas 714-1, 714-2. Furthermore, repeaters 706-1...706-K are placed between base station 702 and UE 704. In this example, K The number is 4. Each of the repeaters 706-1…706-K has two receiving antennas 722-1, 722-2 and two transmitting antennas 724-1, 724-2. In some configurations, the same antennas can be used as both receiving and transmitting antennas.

[0060] Base station 702 uses corresponding transmit chains 740 to generate RF signals to be transmitted at each of the antennas 710-1, 710-2, ... 710-8. Each transmit chain 740 includes an IFFT component 741, a parallel-to-serial (P to S) component 742, a CP insertion component 743, a conversion component 744 including a rate converter and / or a filter, a digital-to-analog converter (D / A) 745, and an up-converter 746.

[0061] Figure 8 This is a schematic diagram 800 illustrating RF signal generation at a base station. In this example, base station 702 may be configured with eight antenna ports 850-1 to 850-8, with one or more antennas 710-1, 710-2, ... 710-8 assigned to each antenna port. Specifically, each of antenna ports 850-1 to 850-8 may be associated with more than one physical antenna. In this case, each antenna port may be referred to as a beamforming antenna port.

[0062] Furthermore, each transmit chain 740 can use a transmitter with SCS1 (e.g., 30 kHz). 810 subcarriers (e.g., 1024 or 4096 subcarriers). The transmit chain 740 of antenna 710-i starts from the first... i The antenna port receives the first k indivual A group of modulation symbols 820-i (represented as...) And generate the corresponding RF signal to be transmitted via antenna 710-i in OFDM symbol A corresponding to SCS1. It is the group index of the modulation symbols, and It is the index of the antenna port.

[0063] Taking antenna 710-1 as an example, this antenna is assigned to antenna port 850-1. The first... k indivual A group of modulation symbols 820-1 ( The signal will be transmitted in one OFDM symbol A via transmission chain 740. Base station 702 will transmit within the corresponding time period. Applied to 810 subcarriers.

[0064] Return to reference Figure 7 ,carry 820-1 modulation symbols Subcarrier 810 is sent to have The IFFT component 741 has one input. The output from the IFFT component 741... The time-domain signal is treated as a time series and sent in parallel to the serial component 742 to form a combined time-domain signal. The CP insertion component 743 receives the combined time-domain signal and adds a cyclic prefix, thereby generating a time-domain signal spanning the OFDM symbol period. The cyclic prefix can eliminate inter-symbol interference between two adjacent OFDM symbols. The resulting time-domain signal is in digital form and is processed by the conversion component 744 to achieve the desired sampling rate. The converted time-domain signal in digital form is sent to the digital-to-analog converter 745, which accordingly generates an analog time-domain signal. Subsequently, the up-converter 746 receives the analog time-domain signal and modulates it with a first carrier frequency (…). The components are mixed to generate an RF signal. The RF signal is transmitted through antenna 710-1 of base station 702. Specifically, the first carrier frequency of the RF signal transmitted from base station 702 can be in FR1.

[0065] Similarly, each of antenna ports 850-2 to 850-8 receives its respective modulation symbol. The transmit chain 740 assigned to each antenna port generates a corresponding RF signal, which is transmitted through the antenna assigned to that antenna port. Therefore, in this example, transmission is performed through antennas 710-1, 710-2, ... 710-8. to .

[0066] Figure 9 This is a schematic diagram 900 illustrating the downlink transmission timing from a base station to a UE via one or more repeaters. Base station 702 transmits RF signals at a first carrier frequency in time slots 910-0, 910-1, 910-2, etc., via antennas 710-1, 710-2, ..., 710-8. As described below, time slots 920-0, 920-1, 920-2, etc., correspond to a first subcarrier interval (SCS1). Repeaters 706-1...706-K receive RF signals at the first carrier frequency in time slots 920-0, 920-1, 920-2, etc. Repeaters 706-1…706-K convert the set of first baseband signals carried on the RF signal at the first carrier frequency to obtain a set of second baseband signals, and transmit the set of second baseband signals via the RF signal at the second carrier frequency in time slots 930-0,…,930-q, time slots 931-0,…,931-q and time slots 932-0,…932-q, etc. As described below, time slots 930-0,…,930-q, etc., correspond to the second subcarrier spacing (SCS2, e.g., 120 kHz). In NR, a time slot can be an interval occupied by 14 OFDM symbols. In this example, The value is 3.

[0067] The duration of each of time slots 920-0, 920-1, 920-2, etc., is TTI1. The duration of each time slot 931-0, ..., 931-q, etc., is TTI2, expressed as follows: SCS2 / SCS1 = TTI1 / TTI2. The first carrier frequency is represented as... And the second carrier frequency is represented as .

[0068] Repeater 706-1…706-K in Received from base station 702 in TTI1 (e.g., time slot 920-0) The RF signal. As described above, each of the repeaters 706-1…706-K generates its own... RF signal. k Each repeater in offset TTI1 TTI2( (For example, in time slots 930-0, ..., 930-q) it is sent The RF signal. Set an offset (e.g., 1) to provide sufficient time for signal reception and processing at the repeater.

[0069] The number of repeaters 706-1…706-K (i.e., At most This allows for transmission using full-time resources. Therefore, UE 704 in time... offset TTI1 TTI2 ( ) receives RF signals.

[0070] In this example, repeaters 706-1…706-K receive RF signals in time slot 920-0. Repeater 706-1 transmits its RF signal in time slot 930-0; repeater 706-2 transmits its RF signal in time slot 930-1; repeater 706-3 transmits its RF signal in time slot 930-2; and repeater 706-4 transmits its RF signal in time slot 930-3.

[0071] Return to reference Figure 7 As described above, a [missing information] is placed between base station 702 and UE 704. K Repeaters 706-1…706-K. Typically, repeaters have… One receiving antenna and One transmitting antenna. In this example, for ease of presentation, A single physical antenna can be used as both a receiving antenna and a transmitting antenna. More specifically, The repeaters 706-1…706-K each have receiving antennas 722-1, 722-2 and transmitting antennas 724-1, 724-2.

[0072] Each of repeaters 706-1…706-K receives RF signals transmitted from base station 702. For example, each of the receiving antennas 722-1, 722-2 of repeater 706-1 can receive RF signals transmitted from antennas 710-1, 710-2,…710-8 of base station 702. The corresponding receive chain 750 processes the RF signals received through each receiving antenna 722-1, 722-2. Receiver chain 750 includes a downconverter 756, an analog-to-digital converter (A / D) 755, a conversion component 754 including a rate converter and / or a filter, a CP removal component 753, a serial-to-parallel (S to P) component 752, and an FFT component 751.

[0073] Taking the receiving antenna 722-1 as an example, the corresponding downconverter 756 processes (e.g., by frequency downconversion) the RF signal received through the antenna to obtain the corresponding analog baseband signal. The analog-to-digital converter 755 converts the analog baseband signal into a digital sample. Specifically, in order to generate channel signal samples from the baseband waveform, the analog-to-digital converter 755 can sample the baseband waveform at a rate higher than its Nyquist sampling rate.

[0074] Digital sampling then passes through a conversion component 754 containing one or more digital filters. These digital filters can perform various functions, including IQ imbalance compensation, carrier synchronization, and / or timing synchronization, to eliminate some defects in the hardware.

[0075] Figure 10 This is a schematic diagram 1000 illustrating the signal transformation at the repeater. Taking the receiving antenna 722-1 of the repeater 706-1 as an example, the FFT component 751 of the receiving antenna 722-1 has a size... The filtered digital samples from the conversion component 754 are passed through a downsampling block if necessary to convert the data rate of the digital sample stream to match the FFT size. Therefore, the location of the OFDM symbol can be determined in the digital samples of the down-conversion. Once the digital samples within the OFDM symbol period are found, the CP removal component 753 removes the CP used to prevent inter-symbol interference (ISI). The serial-to-parallel component 752 will... Each data sample group serves as the input vector to the FFT component 751. The FFT component 751 outputs... modulation symbols 1020, the modulation symbols 1020 was received at the receiving antenna 722-1 of repeater 706-1. to The combination. Furthermore. modulation symbols 1020 in SCS1 Carried on each subcarrier 810.

[0076] As described above, each of the repeaters 706-1…706-K has transmit antennas 724-1, 724-2, and uses a corresponding transmit chain 760 to generate the RF signal to be transmitted through each transmit antenna. Furthermore, each transmit chain 760 corresponds to a corresponding receive chain 750. As described below, the modulation symbols received through the receive antenna of the repeater are retransmitted through the corresponding transmit antenna.

[0077] Taking repeater 706-1 as an example ( The receiving antennas 722-1 and 722-2 correspond to the transmitting antennas 724-1 and 724-2. More specifically, the receiving link 750 of the receiving antenna 722-1 receives... 1020 is retransmitted via transmission link 760 through transmission antenna 724-1. In the presence of More generally, it is necessary to start from One transmitting antenna to The mapping of each receiving antenna, and this mapping can be provided by a linear transformation matrix. In other words, the input for retransmission of the transmit chain 760 of one of the transmit antennas through the repeater is related to the input in the repeater. Received by one or more receiving antennas Perform a linear combination. If and If they are equal, then the linear transformation matrix can be simply represented as the identity matrix representing a one-to-one mapping between a receiving antenna and a transmitting antenna.

[0078] Send chain 760 uses SCS2 1030 subcarriers. IFFT component 761 uses... There are points and have One input / output. In one example, Repeater 706-1 is configured to transmit the FFT component 751. Each output is mapped to the IFFT component 761. Each input has a predetermined rule. Specifically, Each of the inputs can be an FFT component 751. A linear combination of the outputs. In one example... of Each modulation symbol is transmitted through the IFFT component 761. The input selected One input is entered. The remaining IFFT component 761 ( Each input can receive a predetermined value (e.g., 0). The inputs of the IFFT component 761 are... modulation symbols 1040. Represents the repeater's number i IFFT component 761 for each transmitting antenna One input, the The input is the first one sent from base station 702. k Derived from group modulation symbols.

[0079] More specifically, repeater 706-1 will modulation symbols The set of 1040 is applied to OFDM symbol B. 1030 subcarriers. Carrying modulation symbols 1040 Subcarrier 1030 is sent to have The IFFT component 761 has one input. The output from the IFFT component 761... Each digital sample is treated as a time series and sent in parallel to the serial component 762 to form a time-domain signal. The CP insertion component 763 receives the time-domain signal and adds a cyclic prefix, thereby generating a time-domain signal spanning the OFDM symbol B corresponding to SCS2. The resulting time-domain signal is in digital form and is processed by a conversion component 764, including a rate converter and / or a filter, to achieve the desired sampling rate. The converted digital time-domain signal is sent to a digital-to-analog converter 765, which accordingly generates an analog time-domain signal. Subsequently, an up-converter 766 receives the analog time-domain signal and modulates it with a second carrier frequency (…). The signals are mixed to generate an RF signal. The RF signal is transmitted through the transmitting antenna 724-1 of repeater 706-1. Specifically, the second carrier frequency of the RF signal transmitted from repeaters 706-1…706-K can be in FR2.

[0080] Therefore, the baseband signal waveform is generated by multiplying the OFDM symbols by a time-shifted continuous pulse. Rate conversion and digital low-pass filtering for pulse shaping can be performed before the digital-to-analog converter 765 generates the waveform. Once the digital-to-analog converter 765 converts the OFDM symbols into an analog waveform, the spectral image can be suppressed using a simple analog filter.

[0081] Return to reference Figure 7 As described above, the conversion component 754 of the receiving antenna 722-1 serving the repeater 706-1 generates a digital sample of the received baseband time-domain signal in OFDM symbol A. The CP removal component 753 removes the CP in OFDM symbol A and generates a representation. modulation symbols The 1020 digital sample is 774. The digital sample 774 occupies the time period 776. The time period 776 and the corresponding CP duration together constitute the OFDM symbol period A.

[0082] In the first technology, when After obtaining digital sample 774, repeater 706-1 can transform digital sample 774 to generate digital sample 784, and directly input digital sample 784 into the CP insertion component 763 of the corresponding transmitting antenna 724-1. Digital sample 784 represents... modulation symbols 1040, which in this example is related to modulation symbols The same applies to 1020. The digital sample 774, occupying time period 776, is compressed into time period 786. The CP insertion component 763 then adds the corresponding CP to digital sample 784. Time period 786 and the corresponding CP duration together constitute the OFDM symbol period B. Subsequently, as described above, the transmit chain 760 of the transmit antenna 724-1 generates the RF signal corresponding to digital sample 784.

[0083] In the second technology, the repeater 706-1's first... i The receiving antenna and the first i Taking a single transmitting antenna as an example, the serial-to-parallel component 752 of the corresponding receiving chain 750 receives digital samples 774 and generates accordingly. element input vector The FFT component 751 receives the input as... And the above-mentioned equation is generated according to the following equation. : ),in express Point FFT function.

[0084] Repeater 706-1 can be based on one of the options described below. structure These options are the input vectors of the IFFT component 761. In the first option, element vector Mapped to The center of each subcarrier 1030 One subcarrier is used, while the remaining subcarriers are filled with zeros. This transformation can be expressed as:

[0085] in, It is size ( The zero vector of ) / 2.

[0086] In the second option, if Then repeater 706-1 will The j-th element is mapped to The nth element, where and These are integers representing the distance and offset, respectively. They have an index. of The remaining elements (where, for all) , Fill with zeros.

[0087] In the third option, Elements can be mapped / copied Multiple elements, among which Each element corresponds to The elements in. Therefore, due to The information of the symbols in the text is provided by the corresponding symbols. The repeated elements in the data are carried by multiple subcarriers, thus diversity gain can be achieved at the receiver.

[0088] Return to reference Figure 7 As described above, a [missing information] is placed between base station 702 and UE 704. Repeaters 706-1…706-K. Typically, base station 702 has… Each transmitting antenna and its corresponding One transmit antenna port. In this example, It is 8 (corresponding to antenna ports 850-1 to 850-8).

[0089] As described above, a total of K repeaters 706-1…706-K are placed between base station 702 and UE 704. Each repeater has… One receive antenna / transmit antenna. Base station 702 in Each transmitting antenna transmits a baseband signal with SCS1 carried on the first carrier frequency. The baseband signal corresponds to... There are several spatial layers, among which... It is a positive integer and can be at most equal to the total number of repeater antennas, i.e. Repeaters 706-1…706-K receive data transmitted by base station 702 with SCS1. The set of first baseband signals of each subcarrier is then transformed into a set with SCS2. The set of second baseband signals of each subcarrier. Repeaters 706-1…706-K transmit the set of second baseband signals to UE 704 on the second carrier frequency.

[0090] Figure 11 This is a flowchart 1100 of a method (process) for transforming and forwarding wireless signals. This method can be... At least one of the wireless devices in the group of wireless devices (e.g., repeaters 706-1…706-K) performs this action.

[0091] At operation 1102, A group of wireless devices receives a first time-domain signal occupying a first time interval in a first frequency band via each receiving antenna of at least one wireless device, wherein the first time-domain signal includes signals corresponding to a first subcarrier interval. K Each first OFDM symbol represents a first subcarrier spacing. N 1 On each subcarrier N 1 A set of modulation symbols, wherein, M , K and N 1 All are positive integers.

[0092] At operation 1104, at least one wireless device... j Apply FFT to the first OFDM symbol to obtain the result from the first OFDM symbol. j The first OFDM symbol represents N 1 A set of modulation symbols.

[0093] At operation 1106, at least one wireless device generates a second time-domain signal occupying a second time interval and corresponding to the first time-domain signal. The second time-domain signal includes components corresponding to the second subcarrier interval. K Each second OFDM symbol represents a set of N2 modulation symbols on N2 subcarriers using the second subcarrier spacing. K The second OFDM symbol in the first j The second OFDM symbol indicates the use of the second subcarrier spacing. N 2 On each subcarrier N 2 A set of modulation symbols, N 2 The set of modulation symbols is derived from... K The first OFDM symbol in the first OFDM symbol j The first OFDM symbol represents N 1 It is derived from a set of modulation symbols. N 2 It is a positive integer, and j It is 1 and K Integers between 1 and 2, including 1 and 2 K。

[0094] At operation 1108, a second time-domain signal is transmitted in the second frequency band via the transmitting antenna of at least one wireless device.

[0095] In some configurations, the second time interval for transmitting a second time-domain signal from at least one wireless device is different from the time interval for transmitting a second time-domain signal from... M The second time interval of the second time domain signal of other wireless devices in the group of wireless devices.

[0096] In some configurations, corresponding to K The first OFDM symbol in the first OFDM symbol i A portion of the first time-domain signal of the first OFDM symbol and corresponding to K The second OFDM symbol in the first i A portion of the second time-domain signal of the second OFDM symbol is related, where the second OFDM symbol is... i The start of the second OFDM symbol is no earlier than the first. i The end of the first OFDM symbol.

[0097] In some configurations, the first i Each of the second OFDM symbols N 2 The set of modulation symbols is obtained through the first... i In the first OFDM symbol N 1 It is obtained by a linear combination of a set of modulation symbols, or set to a predetermined value.

[0098] In some configurations, N 1 Less than N 2 And linear combination by N 1 The set of modulation symbols is mapped to from N 2 Selected from a set of modulation symbols N 1 It is defined by a modulation symbol.

[0099] In some configurations, linear combination is further achieved by... N 1 A selected modulation symbol from a set of modulation symbols is mapped to a symbol not in the set of modulation symbols. N 2 The selected one from the set of modulation symbols N 1 Each of the remaining modulation symbols in the modulation symbols is defined from the above.

[0100] In some configurations, linear combinations are further achieved by not... N 2 The selected one from the set of modulation symbols N 1Each of the remaining modulation symbols in the modulation symbols is defined by setting a predetermined value.

[0101] In some configurations, M A group of wireless devices has a total of [number] devices in the first frequency band. M r One receiving antenna, of which K The first OFDM symbol period in the first OFDM symbol period N 1 A set of modulation symbols carries L Layer data, L Not greater than M r .

[0102] In some configurations, M The first wireless device in the group of wireless devices has a first frequency band M r1 One receiving antenna, M r1 Less than L .

[0103] In some configurations, the first wireless device in a group of M wireless devices has M r1 One receiving antenna and M r2 One transmitting antenna. Used to transmit... M r2 The second time-domain signal transmitted by one of the transmitting antennas is specifically based on... M r1 It is generated from the first time-domain signal received at one of the receiving antennas.

[0104] In some configurations, M The first wireless device in the group of wireless devices has M r1 One receiving antenna and M r2 One transmitting antenna. Used to transmit... M r2 The second time-domain signal transmitted by one of the transmitting antennas is based on... M r1 It is generated by a linear combination of the first time-domain signals received at one or more receiving antennas.

[0105] In some configurations, when N 1 equal N 2The method includes converting a first time-domain signal into a second time-domain signal by performing a sampling rate conversion in the time domain on a factor determined according to a first subcarrier spacing and a second subcarrier spacing.

[0106] In some configurations, the first frequency band is in frequency range 1 (FR1) and the second frequency band is in frequency range 2 (FR2).

[0107] It should be understood that the specific order or hierarchy of boxes in the disclosed flowchart / flowchart is an example of an exemplary method. Based on design preferences, it should be understood that the specific order or hierarchy of boxes in the flowchart / flowchart can be rearranged. Furthermore, some boxes can be combined or omitted. The appended method claims present the elements of various boxes in a sampling order and are not intended to limit one to the specific order or hierarchy presented.

[0108] The above description is provided to enable those skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects. Therefore, the claims are not intended to be limited to the aspects shown herein, but should be given the full scope consistent with the language of the claims, wherein references to singular elements are not intended to mean “one and only one”, but rather “one or more”, unless specifically stated otherwise. The word “exemplary” as used herein means “as an example, instance, or illustration.” Any aspect described herein as “exemplary” is not necessarily to be construed as preferred or superior to other aspects. Unless otherwise specifically stated, the term “a” refers to one or more. Combinations such as “at least one of A, B, or C,” “one or more of A, B, or C,” “at least one of A, B, and C,” “one or more of A, B, and C,” and “A, B, C, or any combination thereof” include any combination of A, B, and / or C, and may include multiple A, multiple B, or multiple C. Specifically, combinations such as "at least one of A, B, or C", "one or more of A, B, or C", "at least one of A, B, and C", "one or more of A, B, and C", and "A, B, C, or any combination thereof" can be A only, B only, C only, A and B, A and C, B and C, or A and B and C, wherein any such combination may contain one or more members of A, B, or C. All structural and functional equivalents of elements throughout the various aspects described herein that are known or later known to those skilled in the art are expressly incorporated herein by reference and are intended to be covered by the claims. Furthermore, the disclosure herein is not intended to be made public, whether or not such disclosure is expressly stated in the claims. The terms "module", "mechanism", "element", "device", etc., may not be a substitute for the term "means". Therefore, no element of a claim should be construed as means plus function unless the element is expressly stated using the phrase "means for".

Claims

1. A wireless communication method, the method comprising: On the first frequency band and through including M At least one wireless device in the group of wireless devices receives a first time-domain signal occupying a first time interval via each receiving antenna, wherein the first time-domain signal includes a first subcarrier interval. K Each first OFDM symbol represents a first OFDM symbol using the first subcarrier spacing. N 1 On each subcarrier N 1 A set of modulation symbols, wherein, M , K and N 1 All are positive integers; A second time-domain signal is generated at the at least one wireless device, occupying a second time interval and corresponding to the first time-domain signal, wherein the second time-domain signal includes a portion corresponding to the second subcarrier interval. K Each second OFDM symbol represents a second OFDM symbol using the second subcarrier spacing. N 2 On each subcarrier N 2 A set of modulation symbols, wherein K The second OFDM symbol in the first j The second OFDM symbol represents N 2 The set of modulation symbols is derived from the... K The first OFDM symbol in the first OFDM symbol j The first OFDM symbol represents N 1 Derived from a set of modulation symbols, where, N 2 It is a positive integer, and j It is 1 and K Integers between 1 and 2, including 1 and 2 K ;as well as The second time-domain signal is transmitted via the transmitting antenna of the at least one wireless device in the second frequency band. Among them, the first j In the second OFDM symbol N 2 The set of modulation symbols is the first one. j In the first OFDM symbol N 1 The modulation symbols are obtained through mapping.

2. The wireless communication method according to claim 1, characterized in that, The method further includes: For the first j Applying a Fast Fourier Transform to the first OFDM symbol yields the result from the first OFDM symbol. j The first OFDM symbol represents the N 1 A set of modulation symbols.

3. The wireless communication method according to claim 1, characterized in that, The first subcarrier spacing is different from the second subcarrier spacing.

4. The wireless communication method according to claim 1, characterized in that, The second time interval for transmitting the second time-domain signal from the at least one wireless device is different from the time interval for transmitting the second time-domain signal from the at least one wireless device. M The second time interval of the second time domain signal of other wireless devices in the group of wireless devices.

5. The wireless communication method according to claim 1, characterized in that, Corresponding to the K The first OFDM symbol in the first OFDM symbol i A portion of the first time-domain signal of the first OFDM symbol and corresponding to the K The second OFDM symbol in the first i A portion of the second time-domain signal of the second OFDM symbol is related, wherein the second OFDM symbol is related to the second time-domain signal of the second OFDM symbol. i The start of the second OFDM symbol is not earlier than the first... i The end of the first OFDM symbol, i It is 1 and K Integers between 1 and 2, including 1 and 2 K .

6. The wireless communication method according to claim 5, characterized in that, The first i In the second OFDM symbol N 2 The set of modulation symbols is obtained through the first... i In the first OFDM symbol N 1 It is obtained by a linear combination of a set of modulation symbols, or by being set to a predetermined value.

7. The wireless communication method according to claim 6, characterized in that, N 1 Less than N 2 Wherein, the linear combination is achieved by... N 1 The set of modulation symbols is mapped to the set of modulation symbols from the set of modulation symbols. N 2 Selected from a set of modulation symbols N 1 The modulation symbols are defined.

8. The wireless communication method according to claim 7, characterized in that, The linear combination further involves the... N 1 A selected modulation symbol from the set of modulation symbols is mapped to a symbol not in the set. N 2 The selection from the set of modulation symbols N 1 Each of the remaining modulation symbols in the modulation symbols is defined from the above.

9. The wireless communication method according to claim 7, characterized in that, The linear combination further involves not being in the N 2 The selection from the set of modulation symbols N 1 Each of the remaining modulation symbols in the modulation symbols is defined by setting a predetermined value.

10. The wireless communication method according to claim 1, characterized in that, The M A group of wireless devices has a total of [number] devices in the first frequency band. M r A receiving antenna, wherein the K The first OFDM symbol in the first OFDM symbol N 1 A set of modulation symbols carries L Layer data, L Not greater than M r .

11. The wireless communication method according to claim 10, characterized in that, The M At least one wireless device in the group of wireless devices has in the first frequency band M r1 One receiving antenna, M r1 Less than L .

12. The wireless communication method according to claim 10, characterized in that, At least one wireless device in the group of M wireless devices has M r1 One receiving antenna and M r2 A transmitting antenna, wherein, for transmitting via the M r2 The second time-domain signal transmitted by one of the transmitting antennas is specifically based on the... M r1 It is generated from the first time-domain signal received at one of the receiving antennas.

13. The wireless communication method according to claim 10, characterized in that, The M At least one wireless device in the group of wireless devices has M r1 One receiving antenna and M r2 A transmitting antenna, wherein, for transmitting via the M r2 The second time-domain signal transmitted by one of the transmitting antennas is based on the... M r1 It is generated by a linear combination of the first time-domain signals received at one or more of the receiving antennas.

14. The wireless communication method according to claim 1, characterized in that, N 1 equal N 2 The method further includes: The first time-domain signal is converted into the second time-domain signal by performing a sampling rate conversion in the time domain on a factor determined according to the first subcarrier interval and the second subcarrier interval.

15. The wireless communication method according to claim 1, characterized in that, The first frequency band is in frequency range 1 and the second frequency band is in frequency range 2.

16. A wireless device, the wireless device being included in a group comprising M wireless devices, the wireless device comprising: Memory; At least one receiving antenna; At least one transmitting antenna; as well as At least one processor, the at least one processor being coupled to the memory and configured to: In the first frequency band, each receiving antenna of the wireless device receives a first time-domain signal occupying a first time interval, wherein the first time-domain signal includes a signal corresponding to a first subcarrier interval. K Each first OFDM symbol represents a first OFDM symbol using the first subcarrier spacing. N 1 On each subcarrier N 1 A set of modulation symbols, wherein, M , K and N 1 All are positive integers; A second time-domain signal is generated at the wireless device, occupying a second time interval and corresponding to the first time-domain signal, wherein the second time-domain signal includes a portion corresponding to the second subcarrier interval. K Each second OFDM symbol represents a second OFDM symbol using the second subcarrier spacing. N 2 On each subcarrier N 2 A set of modulation symbols, wherein K The second OFDM symbol in the first j The second OFDM symbol represents N 2 The set of modulation symbols is derived from the... K The first OFDM symbol in the first OFDM symbol j The first OFDM symbol represents the N 1 Derived from a set of modulation symbols, where, N 2 It is a positive integer, and j It is 1 and K Integers between 1 and 2, including 1 and 2 K ;as well as The second time-domain signal is transmitted via the transmitting antenna of the wireless device in the second frequency band. Among them, the first j In the second OFDM symbol N 2 The set of modulation symbols is the first one. j In the first OFDM symbol N 1 The modulation symbols are obtained through mapping.

17. The wireless device according to claim 16, characterized in that, The at least one processor is further configured to: For the first j Applying a Fast Fourier Transform to the first OFDM symbol yields the result from the first OFDM symbol. j The first OFDM symbol represents the N 1 A set of modulation symbols.

18. The wireless device according to claim 16, characterized in that, The first subcarrier spacing is different from the second subcarrier spacing.

19. The wireless device according to claim 16, characterized in that, The second time interval for transmitting the second time-domain signal from the wireless device is different from the time interval for transmitting the second time-domain signal from the wireless device. M The second time interval of the second time domain signal of other wireless devices in the group of wireless devices.

20. A computer-readable medium storing computer-executable code for wireless communication of a wireless device, the wireless device being included in a group comprising M wireless devices, wherein the computer-executable code, when executed, causes the wireless device to perform the following operations: In the first frequency band, each receiving antenna of the wireless device receives a first time-domain signal occupying a first time interval, wherein... The first time-domain signal includes K first OFDM symbols corresponding to the first subcarrier spacing, wherein each first OFDM symbol represents a set of N1 modulation symbols using N1 subcarriers of the first subcarrier spacing, wherein M, K and N1 are all positive integers; A second time-domain signal is generated at the wireless device, occupying a second time interval and corresponding to the first time-domain signal. The second time-domain signal includes K second OFDM symbols corresponding to a second subcarrier interval. Each second OFDM symbol represents a set of N2 modulation symbols using N2 subcarriers of the second subcarrier interval. The set of N2 modulation symbols represented by the j-th second OFDM symbol among the K second OFDM symbols is derived from the set of N1 modulation symbols represented by the j-th first OFDM symbol among the K first OFDM symbols. N2 is a positive integer, and j is an integer between 1 and K, inclusive. The second time-domain signal is transmitted via the transmitting antenna of the wireless device in the second frequency band. Among them, the first j In the second OFDM symbol N 2 The set of modulation symbols is the first one. j In the first OFDM symbol N 1 The modulation symbols are obtained through mapping.

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