Timing adjustment of wireless remote units

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless forwarding node can determine a first timing reference configuration for communicating with a first wireless node. The wireless forwarding node can determine a second timing reference configuration for communicating with a second wireless node. The wireless forwarding node can forward communications between the first wireless node and the second wireless node based at least in part on the first timing reference configuration and the second timing reference configuration. Numerous other aspects are provided.

Description

[0001] Cross-references to related applications

[0002] This patent application claims priority to U.S. Provisional Patent Application No. 63 / 198,267, filed October 7, 2020, entitled "TIMING ADJUSTMENT FORWIRELESS REMOTE UNITS", and U.S. Non-Provisional Patent Application No. 17 / 449,977, filed October 5, 2021, entitled "TIMING ADJUSTMENT FOR WIRELESS REMOTE UNITS", which are hereby expressly incorporated herein by reference. Technical Field

[0003] Various aspects of this disclosure generally relate to wireless communication, and specifically to techniques and apparatus for timing adjustments of wireless remote units. Background Technology

[0004] 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 employ multiple access technologies that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power). 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, Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE / LTE-Advanced is an enhancement set of the Universal Mobile Telecommunications System (UMTS) mobile standard issued by the 3rd Generation Partnership Project (3GPP).

[0005] A wireless network may include several base stations (BSs) capable of supporting communication for several user equipments (UEs). UEs may communicate with the BS via downlinks and uplinks. A "downlink" (or "forward link") refers to the communication link from the BS to the UE, while an "uplink" (or "backlink") refers to the communication link from the UE to the BS. As will be described in more detail herein, a BS may be referred to as a B-node, gNB, access point (AP), radio headend, transmit / receive point (TRP), new radio (NR) BS, 5G B-node, etc.

[0006] The multiple access technologies mentioned above have been adopted in various telecommunications standards to provide a common protocol enabling different user equipment to communicate at the city, country, region, and even global levels. NR (which can also be referred to as 5G) is an enhancement set of the LTE mobile standard issued by 3GPP. NR is designed to better support mobile broadband Internet access by improving spectrum efficiency, reducing costs, improving service, utilizing new spectrum, and better integrating with other open standards that support beamforming, multiple-input multiple-output (MIMO) antenna technologies and carrier aggregation, using Orthogonal Frequency Division Multiplexing (OFDM) with a Cyclic Prefix (CP) on the downlink (DL) (CP-OFDM), and CP-OFDM and / or SC-FDM (e.g., also known as Discrete Fourier Transform Extended OFDM (DFT-s-OFDM)) on the uplink (UL). Further improvements to LTE, NR, and other radio access technologies remain useful as the demand for mobile broadband access continues to grow. Summary of the Invention

[0007] In some aspects, a wireless communication method performed by a wireless forwarding node includes: determining a first timing reference configuration for communicating with a first wireless node; determining a second timing reference configuration for communicating with a second wireless node; and forwarding communication between the first wireless node and the second wireless node based at least in part on the first timing reference configuration and the second timing reference configuration.

[0008] In some aspects, a wireless communication method performed by a control node includes: determining an adjustment to one or more timing reference configurations associated with a wireless forwarding node, the wireless forwarding node being configured to forward communication between a first wireless node and a second wireless node; and transmitting to the wireless forwarding node one or more timing adjustment commands indicating the adjustment to the one or more timing reference configurations.

[0009] In some aspects, a wireless communication method performed by a transmitter node includes: transmitting to a wireless relay node a signal to be forwarded to a wireless receiver node, wherein the wireless relay node is associated with a reception timing for receiving the signal from the transmitter node; determining, at least in part, an estimated timing offset to be applied to the reception timing associated with the wireless relay node based on the wireless relay node forwarding the signal back to the transmitter node; and transmitting to the wireless relay node a timing adjustment command indicating the estimated timing offset to be applied to the reception timing.

[0010] In some aspects, a wireless forwarding node for wireless communication includes: a memory; and one or more processors coupled to the memory and configured to: determine a first timing reference configuration for communicating with a first wireless node; determine a second timing reference configuration for communicating with a second wireless node; and forward communication between the first wireless node and the second wireless node based at least in part on the first timing reference configuration and the second timing reference configuration.

[0011] In some aspects, a control node for wireless communication includes: a memory; and one or more processors coupled to the memory and configured to: determine adjustments to one or more timing reference configurations associated with a wireless forwarding node, the wireless forwarding node being configured to forward communication between a first wireless node and a second wireless node; and transmit one or more timing adjustment commands to the wireless forwarding node indicating the adjustments to the one or more timing reference configurations.

[0012] In some aspects, a transmitter node for wireless communication includes: a memory; and one or more processors coupled to the memory and configured to: transmit a signal to be forwarded to a wireless receiver node to a wireless forwarding node, wherein the wireless forwarding node is associated with a reception timing for receiving the signal from the transmitter node; determine an estimated timing offset to be applied to the reception timing associated with the wireless forwarding node based at least in part on the wireless forwarding node forwarding the signal back to the transmitter node; and transmit a timing adjustment command to the wireless forwarding node, the timing adjustment command indicating the estimated timing offset to be applied to the reception timing.

[0013] In some aspects, a non-transitory computer-readable medium stores one or more instructions for wireless communication, which, when executed by one or more processors of a wireless forwarding node, cause the wireless forwarding node to: determine a first timing reference configuration for communicating with a first wireless node; determine a second timing reference configuration for communicating with a second wireless node; and forward communication between the first wireless node and the second wireless node based at least in part on the first timing reference configuration and the second timing reference configuration.

[0014] In some aspects, a non-transitory computer-readable medium stores one or more instructions for wireless communication, which, when executed by one or more processors of a control node, cause the control node to: determine an adjustment to one or more timing reference configurations associated with a wireless forwarding node configured to forward communication between a first wireless node and a second wireless node; and transmit to the wireless forwarding node one or more timing adjustment commands indicating the adjustment to the one or more timing reference configurations.

[0015] In some aspects, a non-transitory computer-readable medium stores one or more instructions for wireless communication, which, when executed by one or more processors of a transmitter node, cause the transmitter node to: transmit a signal to be forwarded to a wireless receiver node to a wireless relay node, wherein the wireless relay node is associated with a reception timing for receiving the signal from the transmitter node; determine an estimated timing offset to be applied to the reception timing associated with the wireless relay node, at least in part based on the wireless relay node forwarding the signal back to the transmitter node; and transmit a timing adjustment command to the wireless relay node, the timing adjustment command indicating the estimated timing offset to be applied to the reception timing.

[0016] In some aspects, an apparatus for wireless communication includes: means for determining a first timing reference configuration for communicating with a first wireless node; means for determining a second timing reference configuration for communicating with a second wireless node; and means for forwarding communication between the first wireless node and the second wireless node based at least in part on the first timing reference configuration and the second timing reference configuration.

[0017] In some aspects, an apparatus for wireless communication includes: means for determining an adjustment to one or more timing reference configurations associated with a wireless forwarding node, the wireless forwarding node being configured to forward communication between a first wireless node and a second wireless node; and means for transmitting to the wireless forwarding node one or more timing adjustment commands indicating the adjustment to the one or more timing reference configurations.

[0018] In some aspects, an apparatus for wireless communication includes: means for transmitting to a wireless forwarding node a signal to be forwarded to a wireless receiver node, wherein the wireless forwarding node is associated with a reception timing for receiving the signal from the apparatus; means for determining, at least in part, an estimated timing offset to be applied to the reception timing associated with the wireless forwarding node based on the wireless forwarding node forwarding the signal back to the apparatus; and means for transmitting to the wireless forwarding node a timing adjustment command, the timing adjustment command indicating the estimated timing offset to be applied to the reception timing.

[0019] The general categories include, as generally described herein with reference to the accompanying drawings and description, and as illustrated in the accompanying drawings and description, methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, distributed units, mobile terminal units, forwarding nodes, repeater nodes, relay nodes, control nodes, wireless communication devices and / or processing systems.

[0020] The features and technical advantages of the examples according to this disclosure have been outlined quite extensively above to facilitate a better understanding of the detailed description that follows. Additional features and advantages will be described below. The disclosed concepts and specific examples can be readily used as the basis for modifications or the design of other structures to achieve the same purpose as this disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein (including their organization and operation) and their associated advantages will be better understood from the following description when considered in conjunction with the accompanying drawings. Each drawing is provided for illustrative and descriptive purposes and is not intended to define the limits of the claims.

[0021] While aspects are described herein by way of example, those skilled in the art will understand that these aspects can be implemented in many different arrangements and scenarios. The techniques described herein can be implemented using different platform types, devices, systems, shapes, sizes, and / or package arrangements. For example, some aspects can be implemented via integrated chip embodiments or other devices based on non-modular components (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / procurement devices, medical devices, or AI-enabled devices). Aspects can be implemented in chip-level components, modular components, non-modular components, non-chip-level components, device-level components, or system-level components. Devices combining the described aspects and features may include additional components and features for implementing and practicing the claimed and described aspects. For example, the transmission and reception of wireless signals may include numerous components for analog and digital purposes (e.g., hardware components including antennas, radio frequency (RF) chains, power amplifiers, modulators, buffers, processors(multiple) processors, interleavers, adders, or summers). The aspects described herein can be practiced in a variety of devices, components, systems, distributed arrangements, or end-user devices with different sizes, shapes, and configurations. Attached Figure Description

[0022] To gain a more detailed understanding of the features of this disclosure, a more specific description of the above-brief summary can be obtained by referring to various aspects, some of which are illustrated in the accompanying drawings. However, it should be noted that these accompanying drawings illustrate only certain typical aspects of this disclosure and are therefore not intended to limit its scope, as other equally valid aspects may be acknowledged in this specification. Identical reference numerals in different drawings may identify the same or similar elements.

[0023] Figure 1 This is a diagram illustrating an example of a wireless network according to this disclosure.

[0024] Figure 2 This is a diagram illustrating an example of a base station communicating with a user equipment (UE) in a wireless network according to this disclosure.

[0025] Figure 3 This is a diagram illustrating an example of a forwarding node that forwards communication between a first wireless node and a second wireless node according to this disclosure.

[0026] Figure 4 This is a diagram illustrating an example of using a forwarding node to forward wireless signals according to this disclosure.

[0027] Figure 5 This is a diagram illustrating an example of a transmit (Tx) chain and a receive (Rx) chain of a forwarding node as an implementation of this disclosure.

[0028] Figures 6A to 6B This is a diagram illustrating examples of Tx chains and Rx chains that serve as relay nodes according to an implementation of this disclosure.

[0029] Figure 7 This is a diagram illustrating an example of an integrated access backhaul network architecture according to this disclosure.

[0030] Figures 8 to 10 This is a diagram illustrating an example of timing adjustment associated with a wireless remote unit according to this disclosure.

[0031] Figures 11 to 13 This is a diagram illustrating an example process associated with timing adjustment for a wireless remote unit according to this disclosure.

[0032] Figures 14 to 16 This is a block diagram of an example device for wireless communication according to the present disclosure. Detailed Implementation

[0033] In communication systems such as 5G or NR, multi-hop networks, such as Integrated Access Backhaul (IAB) networks, can be deployed to enable communication between radio nodes in the network. Typically, radio nodes deployed in a multi-hop network can be associated with timing schemes or timing configurations that align communication between radio nodes associated with different links. For example, one or more timing references can be used to identify a set of communication opportunities, such as a set of symbols or a set of time slots allocated to a set of channels. For example, in an IAB network, timing references may include downlink transmission timing for upstream nodes (e.g., distributed units (DUs) of IAB donors and / or DUs of IAB nodes) to transmit one or more downlink signals to downstream nodes (e.g., UEs and / or mobile terminal (MT) units of sub-IAB nodes). Furthermore, timing references may include downlink receive timing for downstream nodes to receive downlink signals from upstream nodes, uplink transmission timing for downstream nodes to transmit uplink signals to upstream nodes, and / or uplink receive timing for upstream nodes to receive uplink signals from downstream nodes. Downlink transmission timing can typically be aligned across all upstream nodes and can tolerate threshold time misalignment of uplink transmission timing to account for different propagation delays and / or round-trip times between upstream and downstream nodes.

[0034] Some aspects described herein enable the timing framework to adjust various timing references for wireless forwarding nodes deployed in a multi-hop network (e.g., to extend the coverage of a base station and / or enable communication between two nodes that might otherwise be outside the range of wireless communication). For example, in some aspects, a wireless forwarding node can be configured to communicate with a first wireless node using a first timing reference configuration and with a second wireless node using a second timing reference configuration. For example, the first timing reference configuration may include timing references associated with transmitting and receiving signals from the first wireless node, and the second timing reference configuration may include timing references associated with transmitting and receiving signals from the second wireless node. In some aspects, the wireless forwarding node can establish transmit and receive timing references (e.g., symbol-level alignment) for the first and second timing reference configurations and can autonomously and / or based on one or more timing adjustment commands provided by a control node (e.g., based on timing estimation feedback provided to the control node) to adjust or fine-tune the transmit and receive timing references (e.g., at the sub-symbol level and / or sample level). In this way, adjusting the timing reference can increase the synchronization between different nodes in a multi-hop network, which can improve the accuracy of positioning determination, increase the number of hops supported in a multi-hop network, reduce interference in a multi-hop network, and / or reduce distortion associated with forwarded signals, etc.

[0035] The various aspects of this disclosure are described more fully below with reference to the accompanying drawings. However, this disclosure may be embodied in many different forms and should not be construed as limited to any specific structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art. Based on the teachings herein, those skilled in the art will understand that the scope of this disclosure is intended to cover any aspect of this disclosure disclosed herein, whether implemented independently or in combination with any other aspect of this disclosure. For example, any number of the aspects set forth herein can be used to implement an apparatus or method of practice. Furthermore, the scope of this disclosure is intended to cover such apparatus or methods practiced using structures, functions, or structures and functions other than those set forth herein. It should be understood that any aspect of this disclosure disclosed herein may be embodied by one or more elements of the claims.

[0036] Various devices and technologies will now be used to present several aspects of a telecommunications system. These devices and technologies will be described in detail below and illustrated in the accompanying drawings through various boxes, modules, components, circuits, steps, processes, algorithms, etc. (collectively, “elements”). These elements can be implemented using hardware, software, or a combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and design constraints imposed on the entire system.

[0037] It should be noted that although the terms commonly associated with 5G or NR radio access technology (RAT) may be used to describe the aspects herein, the aspects of this disclosure may be applied to other RATs, such as 3G RAT, 4G RAT and / or RATs after 5G (e.g., 6G).

[0038] Figure 1 This diagram illustrates an example of a wireless network 100 according to this disclosure. The wireless network 100 may be or may include elements of a 5G (NR) network and / or an LTE network, etc. The wireless network 100 may include multiple base stations 110 (shown as BS110a, BS 110b, BS 110c, and BS 110d) and other network entities. A base station (BS) is an entity that communicates with a user equipment (UE) and may also be referred to as an NR BS, node B, gNB, 5G node B (NB), access point, transmit / receive point (TRP), etc. Each BS may provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to the coverage area of ​​a BS and / or to a BS subsystem serving that coverage area, depending on the context in which the term is used.

[0039] A BS can provide communication coverage for macrocells, picocells, femtocells, and / or another type of cell. Macrocells can cover a relatively large geographic area (e.g., a radius of several kilometers) and allow unrestricted access for UEs with service subscriptions. Picocells can cover a relatively small geographic area and allow unrestricted access for UEs with service subscriptions. Femtocells can cover a relatively small geographic area (e.g., a home) and allow restricted access for UEs associated with said femtocell (e.g., UEs in a Closed Subscriber Group (CSG)). A BS used for macrocells can be called a macro BS. A BS used for picocells can be called a pico BS. A BS used for femtocells can be called a femto BS or a home BS. Figure 1 In the example shown, BS 110a can be a macro BS of macro cell 102a, BS 110b can be a pico BS of pico cell 102b, and BS 110c can be a femto BS of femto cell 102c. A BS can support one or more (e.g., three) cells. The terms “eNB,” “base station,” “NR BS,” “gNB,” “TRP,” “AP,” “Node B,” “5G NB,” and “cell” are used interchangeably herein.

[0040] In some respects, a cell may not necessarily be stationary, and the geographical area of ​​the cell may move depending on the location of the mobile BS. In some respects, BSs may interconnect with each other and / or with one or more other BSs or network nodes (not shown) in the wireless network 100 via various types of backhaul interfaces, such as direct physical connections or virtual networks, using any suitable transport network.

[0041] The wireless network 100 may also include relay stations. A relay station is an entity that can receive data transmissions from an upstream station (e.g., a BS or a UE) and transmit the data transmissions to a downstream station (e.g., a UE or a BS). A relay station can also be a UE that can relay transmissions for other UEs. Figure 1 In the example shown, relay BS 110d can communicate with macro BS 110a and UE 120d to facilitate communication between BS 110a and UE 120d. A relay BS can also be called a relay station, relay base station, repeater, etc.

[0042] Wireless network 100 can be a heterogeneous network including different types of BSs, such as macro BSs, pico BSs, femto BSs, and repeater BSs. These different types of BSs can have different transmission power levels, different coverage areas, and different effects on interference in wireless network 100. For example, macro BSs can have high transmission power levels (e.g., 5 to 40 watts), while pico BSs, femto BSs, and repeater BSs can have lower transmission power levels (e.g., 0.1 to 2 watts).

[0043] Network controller 130 can be coupled to a group of base stations (BSs) and can provide coordination and control for these BSs. Network controller 130 can communicate with the BSs via backhaul. The BSs can also communicate with each other directly or indirectly via wireless or wired backhaul.

[0044] UEs 120 (e.g., 120a, 120b, 120c) may be distributed throughout the wireless network 100, and each UE may be fixed or mobile. A UE may also be referred to as an access terminal, terminal, mobile station, subscriber unit, station, etc. A UE may be a cellular phone (e.g., a smartphone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet computer, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, a biometric sensor / device, a wearable device (smartwatch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet)), an entertainment device (e.g., a music or video device or a satellite radio), a vehicle component or sensor, a smart meter / sensor, industrial manufacturing equipment, a GPS device, or any other suitable device configured to communicate via wireless or wired media.

[0045] Some UEs can be considered Machine-Type Communication (MTC) or Evolved or Enhanced Machine-Type Communication (eMTC) UEs. MTC UEs and eMTC UEs include, for example, robots, drones, remote devices, sensors, instruments, monitors, and / or location tags that can communicate with a base station, another device (e.g., a remote device), or some other entity. For example, a wireless node can provide connectivity to a network (e.g., a wide area network such as the Internet or cellular networks) via wired or wireless communication links. Some UEs can be considered Internet of Things (IoT) devices and / or can be implemented as NB-IoT (Narrowband Internet of Things) devices. Some UEs can be considered Customer Premises Equipment (CPE). UE 120 can be included within a housing that houses components of UE 120, such as processor components and / or memory components. In some aspects, the processor components and memory components can be coupled together. For example, the processor components (e.g., one or more processors) and memory components (e.g., memory) can be operatively coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0046] Typically, any number of wireless networks can be deployed in a given geographical area. Each wireless network can support a specific RAT and can operate on one or more frequencies. A RAT can also be referred to as a radio technology, air interface, etc. A frequency can also be referred to as a carrier, channel, etc. Each frequency can support a single RAT in a given geographical area to avoid interference between wireless networks using different RATs. In some cases, NR RAT or 5G RAT networks can be deployed.

[0047] In some respects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly using one or more sidelink channels (e.g., without using base station 110 as an intermediary for communicating with each other). For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols or vehicle-to-infrastructure (V2I) protocols) and / or mesh networks. In this case, UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by base station 110.

[0048] The devices of wireless network 100 can communicate using the electromagnetic spectrum, which can be subdivided into various categories, bands, channels, etc., based on frequency or wavelength. For example, the devices of wireless network 100 can communicate using an operating band with a first frequency range (FR1), which can span from 410 MHz to 7.125 GHz; and / or can communicate using an operating band with a second frequency range (FR2), which can span from 24.25 GHz to 52.6 GHz. The frequencies between FR1 and FR2 are sometimes referred to as intermediate frequency bands. Although a portion of FR1 is greater than 6 GHz, FR1 is generally referred to as the "below 6 GHz" band. Similarly, although FR2 differs from the extremely high frequency (EHF) band (30 GHz to 300 GHz) recognized as the "millimeter wave" band by the International Telecommunication Union (ITU), FR2 is generally referred to as the "millimeter wave" band. Therefore, unless otherwise specifically stated, it should be understood that the terms "below 6 GHz," etc., if used herein, can broadly refer to frequencies below 6 GHz, frequencies within FR1, and / or intermediate frequency band frequencies (e.g., above 7.125 GHz). Similarly, unless otherwise specifically stated, it should be understood that the terms "millimeter wave," etc., if used herein, can broadly refer to frequencies within the EHF band, frequencies within FR2, and / or intermediate frequency band frequencies (e.g., below 24.25 GHz). It is conceivable that the frequencies included in FR1 and FR2 can be modified, and the techniques described herein are applicable to those modified frequency ranges.

[0049] As mentioned above, Figure 1 Provided as an example. Other examples may be related to... Figure 1 The descriptions are different.

[0050] Figure 2This is a diagram illustrating an example 200 of a base station 110 communicating with a UE 120 in a wireless network 100 according to the present disclosure. The base station 110 may be equipped with T antennas 234a to 234t, and the UE 120 may be equipped with R antennas 252a to 252r, wherein, generally, T ≥ 1 and R ≥ 1.

[0051] At base station 110, transmission processor 220 can receive data from data source 212 of one or more UEs, select one or more modulation and coding schemes (MCS) for each UE based at least in part on channel quality indicators (CQI) received from the UE, process (e.g., encode and modulate) the data of each UE based at least in part on the MCS selected for the UE, and provide data symbols for all UEs. Transmission processor 220 can also process system information (e.g., to obtain semi-static resource partitioning information (SRPI)) and control information (e.g., CQI requests, grants, and / or upper-layer signaling), and provide overhead symbols and control symbols. Transmission processor 220 can also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS) or demodulation reference signals (DMRS)) and synchronization signals (e.g., primary synchronization signal (PSS) or secondary synchronization signal (SSS)). If applicable, the transmit (TX) multiple-input multiple-output (MIMO) processor 230 can perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, and can provide T output symbol streams to T modulators (MODs) 232a to 232t. Each modulator 232 can process its own output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modulator 232 can further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a to 232t can be transmitted via T antennas 234a to 234t, respectively.

[0052] At UE 120, antennas 252a to 252r can receive downlink signals from base station 110 and / or other base stations and can provide the received signals to demodulators (DEMODs) 254a to 254r respectively. Each demodulator 254 can condition (e.g., filter, amplify, downconvert, and digitize) the received signal to obtain an input sample. Each demodulator 254 can further process the input sample (e.g., for OFDM) to obtain the received symbol. MIMO detector 256 can obtain the received symbol from all R demodulators 254a to 254r, perform MIMO detection on the received symbol if applicable, and provide the detected symbol. Receive processor 258 can process (e.g., demodulate and decode) the detected symbol, provide the decoded data from UE 120 to data sink 260, and provide the decoded control information and system information to controller / processor 280. The term "controller / processor" can refer to one or more controllers, one or more processors, or a combination thereof. The channel processor can determine parameters such as the Received Reference Signal Power (RSRP), Received Signal Strength Indicator (RSSI), Received Reference Signal Quality (RSRQ), and / or CQI. In some respects, one or more components of the UE 120 may be included in the housing 284.

[0053] Network controller 130 may include communication unit 294, controller / processor 290, and memory 292. Network controller 130 may include one or more devices, such as those in a core network. Network controller 130 may communicate with base station 110 via communication unit 294.

[0054] Antennas (e.g., antennas 234a to 234t and / or antennas 252a to 252r) may include one or more antenna panels, antenna groups, antenna element groups, and / or antenna arrays, etc., or may be included in one or more antenna panels, antenna groups, antenna element groups, and / or antenna arrays, etc. Antenna panels, antenna groups, antenna element groups, and / or antenna arrays may include one or more antenna elements. Antenna panels, antenna groups, antenna element groups, and / or antenna arrays may include a set of coplanar antenna elements and / or a set of non-coplanar antenna elements. Antenna panels, antenna groups, antenna element groups, and / or antenna arrays may include antenna elements within a single housing and / or antenna elements within multiple housings. Antenna panels, antenna groups, a set of antenna elements, and / or antenna arrays may include one or more antenna elements coupled to one or more transmitting and / or receiving components, such as... Figure 2 One or more components.

[0055] In the uplink, at UE 120, the transport processor 264 can receive and process data from data source 262 and control information from controller / processor 280 (e.g., to obtain reports including RSRP, RSSI, RSRQ, and / or CQI). The transport processor 264 can also generate reference symbols for one or more reference signals. If applicable, the symbols from the transport processor 264 can be pre-encoded by the TX MIMO processor 266, further processed by modulators 254a to 254r (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to base station 110. In some aspects, the modulator and demodulator (e.g., MOD / DEMOD 254) of UE 120 can be included in the modem of UE 120. In some aspects, UE 120 includes a transceiver. The transceiver may include any combination of antenna(s) 252, modulator and / or demodulator 254, MIMO detector 256, receiver processor 258, transmitter processor 264, and / or TX MIMO processor 266. The processor (e.g., controller / processor 280) and memory 282 may be used to perform aspects of any of the methods described herein (e.g., as referenced). Figures 8 to 16 (As described).

[0056] At base station 110, uplink signals from UE 120 and other UEs can be received by antenna 234, processed by demodulator 232, detected by MIMO detector 236 if applicable, and further processed by receiver processor 238 to obtain decoded data and control information transmitted by UE 120. Receiver processor 238 can provide the decoded data to data sink 239 and the decoded control information to controller / processor 240. Base station 110 may include communication unit 244 and communicate with network controller 130 via communication unit 244. Base station 110 may include scheduler 246 to schedule UE 120 for downlink and / or uplink communication. In some aspects, the modulator and demodulator (e.g., MOD / DEMOD 232) of base station 110 may be included in the modem of base station 110. In some aspects, base station 110 includes a transceiver. The transceiver may include any combination of antenna(s) 234, modulator and / or demodulator 232, MIMO detector 236, receiver processor 238, transmitter processor 220, and / or TXMIMO processor 230. The processor (e.g., controller / processor 240) and memory 242 may be used to perform aspects of any of the methods described herein (e.g., as referenced). Figures 8 to 16 (As described).

[0057] The controller / processor 240 of base station 110, the controller / processor 280 of UE 120 and / or Figure 2 Any other component(s) may perform one or more techniques associated with timing adjustments for the wireless remote unit, as described in more detail elsewhere herein. For example, the controller / processor 240 of base station 110, the controller / processor 280 of UE 120, and / or Figure 2 Any other component(s) can perform or direct, for example Figure 11 Process 1100 Figure 12 Process 1200 Figure 13 The operation of process 1300 and / or other processes as described herein. Memory 242 and 282 may store data and program code for base station 110 and UE 120, respectively. In some aspects, memory 242 and / or memory 282 may include a non-transitory computer-readable medium storing one or more instructions (e.g., code and / or program code) for wireless communication. For example, the one or more instructions, when executed by one or more processors of base station 110 and / or UE 120 (e.g., directly, or after compilation, transformation, and / or interpretation), may cause one or more processors, UE 120, and / or base station 110 to perform or direct, for example... Figure 11 Process 1100 Figure 12 Process 1200 Figure 13 The operation of process 1300 and / or other processes as described herein. In some aspects, execution instructions may include run instructions, translation instructions, compilation instructions and / or interpretation instructions, etc.

[0058] In some aspects, the wireless forwarding node includes means for determining a first timing reference configuration for communicating with a first wireless node, means for determining a second timing reference configuration for communicating with a second wireless node, and / or means for forwarding communication between the first and second wireless nodes based at least in part on the first and second timing reference configurations. Means for the wireless forwarding node to perform the operations described herein may include, for example, a transmit processor 220, a TX MIMO processor 230, a modulator 232, an antenna 234, a demodulator 232, a MIMO detector 236, a receive processor 238, a controller / processor 240, a memory 242, and / or a scheduler 246. Alternatively or additionally, means for the wireless forwarding node to perform the operations described herein may include, for example, an antenna 252, a demodulator 254, a MIMO detector 256, a receive processor 258, a transmit processor 264, a TX MIMO processor 266, a modulator 254, a controller / processor 280, and / or a memory 282.

[0059] In some aspects, the wireless forwarding node includes means for determining a reception timing for receiving one or more signals from the first wireless node based at least in part on one or more reference signal transmissions received from the first wireless node, and / or means for determining a transmission timing for forwarding one or more signals to the first wireless node based at least in part on one or more timing advance commands received from a control node or the first wireless node.

[0060] In some aspects, the wireless forwarding node includes means for receiving signals from a first wireless node, means for forwarding signals back to the first wireless node, and / or means for receiving timing adjustment commands for receiving timing from the first wireless node or a control node, the timing adjustment commands indicating at least in part based on an estimated timing offset of the signals forwarded back to the first wireless node.

[0061] In some aspects, the wireless forwarding node includes means for transmitting to a control node or a first wireless node information indicating an estimated timing offset associated with the reception timing.

[0062] In some aspects, the wireless forwarding node includes means for receiving information from a control node or a first wireless node indicating adjustments to the reception timing associated with the wireless forwarding node.

[0063] In some aspects, a wireless forwarding node includes: means for receiving a signal from a first wireless node to be forwarded to a second wireless node, wherein the signal is associated with a power delay distribution comprising a plurality of channel taps received at different times; and / or means for forwarding the signal to the second wireless node using a cyclic prefix aligned with the earliest channel tap among the plurality of channel taps that satisfies a threshold.

[0064] In some aspects, a wireless forwarding node includes: means for receiving a signal from a second wireless node to be forwarded to a first wireless node, wherein the signal is associated with a power delay distribution comprising a plurality of channel taps received at different times; and / or means for forwarding the signal to the first wireless node using a cyclic prefix aligned with the earliest channel tap among the plurality of channel taps that satisfies a threshold.

[0065] In some aspects, the control node includes: means for determining adjustments to one or more timing reference configurations associated with a wireless forwarding node configured to forward communications between a first wireless node and a second wireless node; and / or means for transmitting one or more timing adjustment commands to the wireless forwarding node indicating adjustments to one or more timing reference configurations. Means for the control node to perform the operations described herein may include, for example, a transmit processor 220, a TX MIMO processor 230, a modulator 232, an antenna 234, a demodulator 232, a MIMO detector 236, a receive processor 238, a controller / processor 240, a memory 242, and / or a scheduler 246. Alternatively or additionally, means for the control node to perform the operations described herein may include, for example, a controller / processor 290, a memory 292, and / or a communication unit 294.

[0066] In some aspects, the control node includes means for transmitting one or more timing adjustment commands to one or more of a first wireless node or a second wireless node, the one or more timing adjustment commands indicating adjustments to one or more timing reference configurations associated with communication with the wireless forwarding node.

[0067] In some aspects, the transmitter node includes: means for transmitting a signal to be forwarded to a wireless receiver node to a wireless relay node, wherein the wireless relay node is associated with a reception timing for receiving the signal from the transmitter node; means for determining an estimated timing offset to be applied to the reception timing associated with the wireless relay node, at least in part based on the wireless relay node forwarding the signal back to the transmitter node; and / or means for transmitting a timing adjustment command to the wireless relay node, the timing adjustment command indicating the estimated timing offset to be applied to the reception timing. Means for the transmitter node to perform the operations described herein may include, for example, a transmit processor 220, a TX MIMO processor 230, a modulator 232, an antenna 234, a demodulator 232, a MIMO detector 236, a receive processor 238, a controller / processor 240, a memory 242, and / or a scheduler 246. Alternatively or concurrently, means for a transmitter node to perform the operations described herein may include, for example, an antenna 252, a demodulator 254, a MIMO detector 256, a receiver processor 258, a transmitter processor 264, a TX MIMO processor 266, a modulator 254, a controller / processor 280, and / or a memory 282.

[0068] In some aspects, the transmitter node includes means for transmitting instructions to the wireless relay node to forward a signal back to the transmitter node, and / or means for receiving the forwarded signal from the wireless relay node based at least in part on the instructions.

[0069] Although Figure 2 The boxes in the diagram are shown as different components, but the functions described above with respect to these boxes can be implemented as a single hardware, software, or combined component or a combination of various components. For example, the functions described with respect to the transmit processor 264, the receive processor 258, and / or the TX MIMO processor 266 can be performed by or under the control of the controller / processor 280.

[0070] As mentioned above, Figure 2 Provided as an example. Other examples may be related to... Figure 2 The descriptions are different.

[0071] Figure 3 This is a diagram illustrating example 300 of a forwarding node (e.g., a repeater node or relay node) that forwards communication between a first wireless node and a second wireless node according to the present disclosure. As shown, example 300 includes a first wireless node 305 (e.g., an IAB node, IAB donor, base station 110, UE 120, etc.), a forwarding node 310 (e.g., a repeater device, relay device, base station 110, UE 120, millimeter-wave (mmWave) repeater, mmWave repeater, digital repeater, analog repeater, digital repeater, analog repeater, etc.), and a second wireless node 315 (e.g., an IAB node, IAB donor, base station 110, UE 120, another forwarding node 310, etc.). In some aspects, the first wireless node 305 and / or the second wireless node 315 may be aware of the forwarding node 310. In some aspects, the first wireless node 305 and / or the second wireless node 315 may not be aware of the forwarding node 310.

[0072] like Figure 3 As shown, the first wireless node 305 can use the direct link 325 (e.g., an access link, etc.) between the first wireless node 305 and the second wireless node 315 to transmit communication 320 (e.g., data communication, control communication, etc.) to the second wireless node 315. However, the first wireless node 305 may not be able to use the direct link 325 to transmit communication 320 to the second wireless node 315. For example, the second wireless node 315 may be outside the transmission range of the first wireless node 305, the direct link 325 may be blocked, etc.

[0073] Therefore, the first wireless node 305 can communicate with the second wireless node 315 using the indirect link 330. For example, the first wireless node 305 can transmit communication 320 to the forwarding node 310. In some aspects, the first wireless node 305 can transmit communication 320 directly to the forwarding node 310 (e.g., if the first wireless node 305 knows about the forwarding node 310). In some aspects, the forwarding node 310 can be configured (e.g., by a control node, or by the second wireless node 315, etc.) to receive communication 320 from the first wireless node 305 (e.g., if the first wireless node 305 does not know about the forwarding node 310).

[0074] like Figure 3 As shown, communication 320 can reach and be forwarded by forwarding node 310. In some aspects, forwarding node 310 is a repeater node (or repeater unit), and the repeater node can regenerate the signal of communication 320. For example, the repeater node can receive the signal of communication 320, extract the tone from the signal, regenerate the signal based at least in part on the extracted tone, and transmit the regenerated signal. In some aspects, forwarding node 310 is a relay node (or relay unit), and the relay node can generate a new signal based at least in part on the signal of communication 320. For example, the relay node can receive a downlink signal carrying information associated with the communication (e.g., in-phase quadrature (IQ) samples), generate a new signal based at least in part on the information, and transmit the new signal. As another example, the relay node can receive an uplink signal, generate a new signal carrying information associated with the uplink signal (e.g., IQ samples), and transmit the new signal.

[0075] In some cases, the indirect link 330 can be an access link, a sidelink, or a fronthaul link. For example, if the first radio node 305 is a base station 110 and the second radio node 315 is a UE 120, then the indirect link 330 between the first radio node 305 and the forwarding node 310 can be a fronthaul link. The indirect link 330 between the forwarding node 310 and the second radio node 315 can be an access link. Figure 3 The communication scheme shown can improve network performance and increase reliability by providing link diversity for communication to the first wireless node 305 and / or the second wireless node 315, by extending the communication coverage area of ​​the first wireless node 305 and / or the second wireless node 315, etc.

[0076] As mentioned above, Figure 3 Provided as an example. Other examples may be related to... Figure 3 The descriptions are different.

[0077] Figure 4This is a diagram illustrating an example 400 of using a forwarding node 405 to forward wireless signals according to this disclosure. In some aspects, as shown, the forwarding node 405 can communicate with a control node 410 and one or more wireless nodes 415, 420 in a wireless network. In some aspects, the forwarding node 405 may include... Figure 3 The forwarding node 310 is shown. In some aspects, the control node 410, wireless node 415, and / or wireless node 420 may be, for example... Figure 3 The first wireless node 305 shown Figure 3 The second wireless node 315 shown Figure 1 The IAB node, IAB donor, and base station 110 shown are shown. Figure 1 The wireless nodes shown include UE 120, etc.

[0078] In some aspects, the repeater node 405 may be a digital repeater node (or repeater unit) configured to receive an incoming signal and transmit a regenerated version of the incoming signal. For example, when implemented or otherwise configured as a digital repeater node, the repeater node 405 may receive an incoming signal, extract a tone from the incoming signal, regenerate the incoming signal based at least in part on the extracted tone, and transmit the regenerated signal as an outgoing signal. Alternatively or concurrently, the repeater node 405 may be a digital relay node (or relay unit) configured to generate a new signal based at least in part on the incoming signal. For example, when implemented or otherwise configured as a digital relay node, the repeater node 405 may receive a downlink signal carrying information (e.g., IQ samples) (e.g., a fronthaul physical downlink shared channel (FH-PDSCH)), generate a new downlink signal carrying information about and / or from the downlink signal (e.g., IQ samples) (e.g., a conventional physical downlink shared channel (PDSCH)), and transmit the new downlink signal to a receiver. As another example, when implemented or otherwise configured as a digital relay node, forwarding node 405 can receive an uplink signal (e.g., a conventional physical uplink shared channel (PUSCH)), generate a new uplink signal (e.g., an FH-PUSCH) carrying information associated with the uplink signal (e.g., IQ samples), and transmit the new uplink signal to a receiver.

[0079] like Figure 4 As shown, forwarding node 405 may include control component 425 and forwarding component 430. In some aspects, control component 425 may facilitate the establishment of a radio control interface 435 between forwarding node 405 and control node 410. In some aspects, control component 425 may include one or more components and / or functions, said one or more components and / or functions being a base station (e.g., Figure 1 and Figure 2 The base station 110 shown), UE (e.g., Figure 1 and Figure 2 One or more components, such as UE 120 shown, or similar components, may be used. In some aspects, the forwarding component 430 may perform one or more forwarding (e.g., repeating and / or relaying) operations based at least in part on information received by the control component through the radio control interface 435. For example, a forwarding operation may include receiving a first signal 440, performing one or more digital processing operations on the first signal 440 to generate a second signal 445, and transmitting the second signal 445. The second signal 445 may be the result of the forwarding node 405 performing a repeating operation to regenerate the first signal 440 (e.g., through one or more digital processing operations) such that X′≈X, where X is the first signal 440 and X′ is the second signal 445. Alternatively or additionally, the second signal 445 may be the result of the forwarding node 405 performing a relay operation. In this case, the forwarding node 405 can generate a second signal 445 to carry information about and / or from the first signal 440 (e.g., through one or more digital processing operations) such that Y = f(X), where X is the first signal 440, Y is the second signal 445, and f is a function based at least in part on one or more digital processing operations performed by the forwarding node 405 to generate the second signal 445.

[0080] In some aspects, the first signal 440 may include communication transmitted from the control node 410 to the wireless node 415 (e.g., Figure 3 The communication 320 shown is illustrated. In some aspects, as shown, the first signal 440 can be transmitted from the control node 410 to the wireless node 415. In some aspects, the first signal 440 can be transmitted from the wireless node 415 or the wireless node 420 to the control node 410, to another wireless node 415 or the wireless node 420, etc. In some aspects, the first signal 440 can be sent to multiple wireless nodes (e.g., wireless node 415, wireless node 420, control node 410, etc.). In some aspects, the first signal 440 may include synchronization signal block (SSB) and / or residual minimum system information (RMSI) communication, information associated with SSB or RMSI communication, physical downlink control channel (PDCCH) transmission, PDSCH transmission, physical uplink control channel (PUCCH) transmission, PUSCH transmission, physical side link control channel (PSCCH) transmission, physical side link shared channel (PSSCH) transmission, acknowledgment or negative acknowledgment (ACK / NACK) feedback messages, etc.

[0081] In some respects, forwarding component 430 may perform one or more forwarding operations based at least in part on a configuration established using control component 425. For example, in some respects, control node 410 may use control message 455 to transmit configuration information 450, and forwarding node 405 may use control component 425 to receive control message 455.

[0082] In some aspects, control node 410 may transmit configuration information 450 in control messages 455 via radio control interface 435. Configuration information 450 may be carried in at least one control message 455. In some aspects, control messages may be used to control communication between forwarding node 405 and control node 410 according to the specifications of radio control interface 435. In some aspects, configuration information 450 may be carried in lower-layer control messages (e.g., control messages associated with the physical layer and / or media access control (MAC) layer), upper-layer control messages (e.g., control messages associated with the network layer), application-layer control messages (e.g., control messages associated with the application layer), and so on. For example, control messages may be carried using radio resource control (RRC) messages, downlink control information (DCI), MAC control elements (MAC-CE), and so on.

[0083] In some aspects, control messages may be included within the first signal 440. In some aspects, configuration information 450 may be carried in the fronthaul PDCCH (FH-PDCCH) control message. In some aspects, the FH-PDCCH control message may include a DCI scrambled with the fronthaul radio network temporary identifier (FH-RNTI). The FH-RNTI may be associated with control component 425.

[0084] In some aspects, control message 455 can be configured with any number and different types of settings, configurations, digital processing operations, receive operations, buffering operations, forwarding (transmission) operations, etc. In some aspects, forwarding node 405 can transmit one or more control messages, and control node 410 can receive one or more control messages. For example, in some aspects, forwarding node 405 can use control component 425 to transmit control messages to control node 410 via wireless control interface 435. The control messages transmitted by forwarding node 405 can indicate configuration, capabilities, status, and / or other information associated with forwarding node 405.

[0085] As described above, in some aspects, control node 410 can configure specific forwarding (e.g., repeating and / or relaying) operations of forwarding node 405 by transmitting configuration information 450 to forwarding node 405. In some aspects, configuration information 450 can instruct digital processing operations. Digital processing operations can include a combination of multiple digital processing options (e.g., as follows). Figure 5 and Figures 6A to 6B The digital processing options selected in the description. In some aspects, configuration information 450 may include one or more information elements (IEs) indicating receive configuration, buffer configuration, forwarding configuration, information requests, etc.

[0086] In some aspects, the receive configuration can configure one or more receive operations of the forwarding component 430 with respect to receiving the first signal 440. The receive configuration may indicate, for example, receive analog beamforming configuration, time-domain resources associated with the first signal 440, frequency-domain resources associated with the first signal 440, parameter set associated with the first signal 440, digital receiver beamforming configuration, resource element (RE) mapping information associated with the first signal 440, channel estimation configuration, scrambling identifier associated with the first signal 440, coding configuration associated with the first signal 440, and so on.

[0087] In some aspects, the buffer configuration can configure the forwarding component 430 to perform one or more buffering operations with respect to the digitized form of the buffered first signal 440. In some aspects, the buffer configuration can indicate analog-to-digital converter (ADC) settings, digital-to-analog converter (DAC) settings, IQ sample compression settings, IQ sample decompression settings, and so on.

[0088] In some aspects, the forwarding configuration can configure the forwarding component 430 to perform one or more forwarding operations with respect to transmitting a second signal 445, which may be a regenerated form of the first signal 440 or a new signal carrying information about and / or from the first signal 440. In some aspects, the forwarding configuration may include a transmission beamforming configuration, time-domain resources associated with transmitting the second signal, transmission power settings, transmission amplification settings, transmission center frequency, a parameter set associated with transmitting the second signal, a digital transmitter beamforming configuration, RE mapping information associated with transmitting the second signal, layer mapping configuration, precoding configuration, scrambling identifiers associated with transmitting the second signal, encoding configurations associated with transmitting the second signal, and so on.

[0089] In some aspects, the information request can configure the forwarding component 430 to perform one or more reporting operations regarding providing information to the control node 410. The information may include information about the operation of the forwarding node 405, the configuration of the forwarding node 405, the settings of the forwarding node 405, channels, communications, etc. In some aspects, the information request may include requests for buffer status, power status, measurement reports, the capabilities of digital repeaters, the configuration of the forwarding node 405, etc.

[0090] As mentioned above, Figure 4 Provided as an example. Other examples may be related to... Figure 4 The descriptions are different.

[0091] Figure 5 This is a diagram illustrating an example 500 of a forwarding node, which is a repeater node, with a transmit (Tx) chain 502 and a receive (Rx) chain 504 according to an implementation of this disclosure.

[0092] In some respects, one or more components of the Tx chain 502 may be implemented in the transfer processor 220, the TX MIMO processor 230, the MOD / DEMOD 232, the controller / processor 240, etc., as described above. Figure 2 As described. In some aspects, Tx chain 502 can be implemented in a repeater node for transmitting outgoing signals (e.g., uplink data, downlink data, uplink reference signal, downlink reference signal, uplink control information, downlink control information, etc.) associated with repetitive operations performed by the repeater node.

[0093] In some respects, one or more components of the Rx chain 504 may be implemented in the receive processor 238, MIMO detector 236, MOD / DEMOD 232, controller / processor 240, etc., as described above. Figure 2 As described. In some aspects, Rx chain 504 can be implemented in a repeater node to receive incoming signals (e.g., downlink data, uplink data, downlink reference signal, uplink reference signal, downlink control information, uplink control information, etc.) associated with repetitive operations performed by the repeater node.

[0094] like Figure 5 As shown in Example 500, the incoming signal can be a downlink signal received from the DU of the IAB node, base station 110, etc. via the fronthaul link, and the outgoing signal can be a regenerated version of the downlink signal transmitted to the MT unit of the IAB node, UE 120, etc. via the access link. Alternatively, the incoming signal can be an uplink signal received from the MT unit of the IAB node, UE 120, etc. via the access link, and the outgoing signal can be a regenerated version of the uplink signal transmitted to the DU of the IAB node, base station 110, etc. via the fronthaul link. Therefore, as described herein, the repetitive operation performed by the repeater node can be symmetrical for both downlink and uplink signals. Furthermore, in some aspects, the means of transmitting the incoming signal and / or receiving the outgoing signal may be unaware of the repeater node (e.g., the repetitive operation may be transparent to the transmitting and / or receiving means).

[0095] like Figure 5As shown, the incoming signal can be processed by Rx chain 504. For example, as described herein, the repeater node can perform different levels of analog and / or digital processing to regenerate the incoming signal into an outgoing signal. The level of processing performed by the repeater node can be based at least in part on the configuration received by the repeater node (e.g., from the control node, etc.). For example, as shown by reference numeral 506 (which illustrates what may be referred to as split option 9), the repeater node can perform analog beamforming on the incoming signal and can provide the analog signal to Tx chain 502. The repeater node can then perform analog beamforming on the analog signal to transmit the outgoing signal to the receiving device. In this case, the repeater node can be configured as an analog repeater.

[0096] Alternatively, the repeater node can be configured as a digital repeater, in which case the repeater node can further process the incoming signal. For example, as shown by reference numeral 508 (which illustrates what may be called segmentation option 8), the repeater node can process the analog signal by using an ADC to convert the incoming signal from the analog domain to the digital domain to determine the time-domain IQ samples associated with the incoming signal. Thus, in some aspects, the repeater node can use a DAC to process the time-domain IQ samples to regenerate the analog signal, and then use analog beamforming to transmit the analog signal.

[0097] Alternatively, as shown by reference numeral 510 (which illustrates what may be called segmentation option 7-1), the transponder node can further process the incoming signal by removing the cyclic prefix (CP) from the time-domain IQ samples and performing a Fast Fourier Transform (FFT) to determine the frequency-domain IQ samples associated with the incoming signal. In this case, the transponder node can then generate the outgoing signal by performing an inverse FFT (iFFT) on the frequency-domain IQ samples and adding the CP to obtain time-domain IQ samples, converting the time-domain IQ samples into an analog signal using a DAC, and using analog beamforming to transmit the analog signal.

[0098] Alternatively, as shown by reference numeral 512 (which illustrates what may be referred to as segmentation option 7-2), the transponder node may further process the incoming signal to determine the symbol (e.g., the IQ symbol of the occupied tone) of each antenna associated with the incoming signal. For example, the transponder node may perform a digital beamforming process on the frequency domain IQ samples (e.g., at least in part based on a digital Tx beamforming configuration) and may further perform RE demapping at least in part based on the RE mapping configuration received by the transponder node to identify the RE of the incoming signal and / or the occupied tone. The transponder node can generate the outgoing signal by processing the symbol (e.g., the IQ symbol of the occupied tone) of each antenna using RE mapping and digital beamforming information.

[0099] Alternatively, as shown by reference numeral 514 (which illustrates what may be referred to as splitting option 7-3), the transponder node may further process the incoming signal to determine the codeword associated with the incoming signal (e.g., log-likelihood ratio (LLR) value, etc.). For example, the transponder node may determine the codeword by performing channel estimation and channel equalization (e.g., to identify and / or remove noise associated with the incoming signal) on the IQ symbols of the occupied tone and by performing a demodulation procedure on the incoming signal. In this case, the transponder node may generate the outgoing signal by modulating the codeword, performing layer mapping, applying precoding, performing RE mapping, performing digital Tx beamforming, applying iFFT and / or adding CP, using a DAC to convert the signal from the digital domain to the analog domain, and performing analog beamforming to transmit the outgoing signal.

[0100] Alternatively, as shown by reference numeral 516 (which illustrates what may be referred to as Segmentation Option 6), the transponder node may further process the incoming signal to obtain a transport block associated with the incoming signal (e.g., the transponder node may fully decode the incoming signal). For example, the transponder node may obtain the transport block by descrambling the codewords (e.g., using a scrambling identifier associated with the incoming signal) and decoding the descrambled codewords (e.g., at least in part based on the MCS associated with the incoming signal). In this case, the transponder node may generate the outgoing signal by encoding the transport block according to the Tx MCS, scrambling the encoded transport block to regenerate the codewords, modulating the codewords and performing layer mapping and precoding to regenerate the symbols for each antenna, performing RE mapping and digital Tx beamforming to regenerate the frequency domain IQ samples, applying iFFT and / or adding CP to the frequency domain IQ samples to regenerate the time domain IQ samples, converting the time domain IQ samples from the digital domain to the analog domain using a DAC, and performing analog beamforming on the analog signal in the analog domain to transmit the outgoing signal.

[0101] In some respects, the level of processing performed by the repeater node on the incoming signal can be configured by the control node or another wireless node. The outgoing signal can be a regenerated version of the incoming signal, which is at least in part based on the level of processing performed by the repeater node.

[0102] Figure 5 The number and arrangement of components shown are provided as an example. In reality, with... Figure 5 Compared to the components shown, there may be additional components, fewer components, different components, or components arranged in a different manner. Furthermore, Figure 5 The two or more components shown can be implemented within a single component, or Figure 5 The single component shown can be implemented as multiple distributed components. Alternatively, Figure 5 The set of components shown (e.g., one or more components) can perform actions described by Figure 5 The other set of components shown performs one or more functions.

[0103] Figures 6A to 6B The diagram illustrates examples 600 and 650 of Tx chain 602 and Rx chain 604 as relay nodes according to an implementation of this disclosure.

[0104] In some respects, one or more components of the Tx chain 602 may be implemented in the transfer processor 220, the TX MIMO processor 230, the MOD / DEMOD 232, the controller / processor 240, etc., as described above. Figure 2 As described. In some aspects, Tx chain 602 can be implemented in a relay node for transmitting outgoing signals (e.g., uplink data, downlink data, uplink reference signal, downlink reference signal, uplink control information, downlink control information, etc.) associated with relay operations performed by the relay node.

[0105] In some respects, one or more components of the Rx chain 604 may be implemented in the receive processor 238, MIMO detector 236, MOD / DEMOD 232, controller / processor 240, etc., as described above. Figure 2 As described. In some aspects, Rx chain 604 can be implemented in a relay node to receive incoming signals (e.g., downlink data, uplink data, downlink reference signal, uplink reference signal, downlink control information, uplink control information, etc.) associated with relay operations performed by the relay node.

[0106] like Figure 6A As shown in Example 600, the incoming signal can be received by the relay node via the fronthaul link. For example, the incoming signal could be a downlink signal received from a DU such as an IAB node, base station 110, etc. Figure 6AAs shown, the incoming signal can be processed by Rx chain 604. For example, the relay node can fully decode the incoming signal to obtain the information carried in the incoming signal (e.g., payload). The relay node can perform analog beamforming on the incoming signal. The relay node can use an ADC to convert the incoming signal from the analog domain to the digital domain. The relay node can remove the CP and / or FFT associated with the incoming signal. The relay node can perform a digital beamforming process on the incoming signal (e.g., at least in part based on a digital Tx beamforming configuration). The relay node can perform a RE demapping procedure at least in part based on the RE mapping configuration received by the relay node to identify the RE of the signal and / or the occupied tone. The relay node can perform channel estimation and channel equalization on the incoming signal (e.g., to identify and / or remove noise associated with the incoming signal). The relay node can perform a demodulation procedure on the incoming signal. The relay node can descramble the incoming signal (e.g., using the scrambling ID associated with the incoming signal). Relay nodes can decode incoming signals (e.g., at least in part based on the MCS associated with the incoming signal).

[0107] After decoding the incoming signal, the relay node can identify the information carried by the incoming signal. For example, the payload of the incoming signal may include time-domain IQ samples, frequency-domain IQ samples, symbols for each antenna (e.g., IQ symbols for the occupied tone), codewords, transport blocks, etc. The relay node can use Tx chain 602 to generate the outgoing signal. The amount or level of processing performed by the relay node in association with Tx chain 602 may be based at least in part on the information carried by the incoming signal, the configuration received by the relay node (e.g., from the control node, etc.), etc.

[0108] As shown by reference numeral 606 in the attached figure (which shows splitting option 6), if the incoming signal carries a transport block, the relay node can generate the outgoing signal by fully encoding the transport block to form the outgoing signal (e.g., by encoding the transport block according to TxMCS, scrambling the encoded transport block, modulating the scrambled transport block, performing layer mapping, precoding, performing digital Rx beamforming, applying FFT and / or adding CP, converting the signal from the digital domain to the analog domain using a DAC, performing analog beamforming, and transmitting the outgoing signal).

[0109] As shown by reference numeral 608 in the attached figure (which illustrates splitting option 7-3), if the incoming signal carries a codeword, the relay node can generate the outgoing signal without performing encoding or scrambling. That is, the relay node can modulate the codeword, perform layer mapping, perform precoding, perform digital Tx beamforming, apply FFT and / or add CP, convert the signal from the digital domain to the analog domain using a DAC, perform analog beamforming, and transmit the outgoing signal.

[0110] As shown by reference numeral 610 in the attached figure (which illustrates split option 7-2), if the incoming signal carries an indication of the symbols for each antenna (e.g., the IQ symbols of the occupied tone), the relay node may not perform encoding, scrambling, modulation, layer mapping, and / or precoding. That is, the relay node may perform digital Rx beamforming on the IQ symbols of the occupied tone, apply FFT and / or add CP, convert the signal from the digital domain to the analog domain using a DAC, perform analog beamforming, and transmit the outgoing signal.

[0111] As shown by reference numeral 612 in the attached figure (which illustrates splitting option 7-1), if the incoming signal carries frequency domain IQ samples, the relay node may not perform encoding, scrambling, modulation, layer mapping, precoding, and / or digital beamforming. That is, the relay node can apply FFT and / or add CP to the frequency domain IQ samples, use a DAC to convert the signal from the digital domain to the analog domain, perform analog beamforming, and transmit the outgoing signal.

[0112] As shown by reference numeral 614 in the attached figure (which illustrates splitting option 8), if the incoming signal carries time-domain IQ samples, the relay node may not perform encoding, scrambling, modulation, layer mapping, precoding, digital beamforming, and / or apply FFT and / or add CP. That is, the relay node can use a DAC to convert the time-domain IQ samples from the digital domain to the analog domain, perform analog beamforming, and transmit the outgoing signal.

[0113] As a result, the level of digital processing used to generate the outgoing signal can vary, at least in part, based on the information carried by the incoming signal. As described above, the relay node can process the incoming signal to identify the information included in the payload of the incoming signal. The relay node can generate the outgoing signal, at least in part, based on the information carried by the incoming signal, which includes information about and / or from the incoming signal. In some aspects, the device receiving the outgoing signal may be unaware of the relay node (e.g., relay operation may be transparent to the receiving device).

[0114] like Figure 6B As shown in Example 650, the incoming signal can be received by the relay node via the access link. For example, the incoming signal can be an uplink signal received from the MT unit of the IAB node, UE 120, etc. In some respects, the device transmitting the incoming signal may not know the relay node (e.g., the relay operation may be transparent to the transmitting device).

[0115] Relay nodes can perform different levels of digital processing to determine information associated with incoming signals. The processing level can be at least partially based on the configuration received by the relay node (e.g., from a control node, etc.). For example, as shown by reference numeral 652 (which illustrates segmentation option 8), a relay node can process the incoming signal to determine time-domain IQ samples associated with it. The relay node can generate the outgoing signal by processing the time-domain IQ samples and including them in the payload of the outgoing signal (e.g., by fully encoding the transport block indicating the time-domain IQ samples). The outgoing signal can be transmitted to another wireless node using a fronthaul link.

[0116] As shown by reference numeral 654 in the attached figure (which illustrates splitting option 7-1), a relay node can process the incoming signal to determine the frequency-domain IQ samples associated with it. The relay node generates the outgoing signal by processing the frequency-domain IQ samples and including them in the payload of the outgoing signal (e.g., by fully encoding the transport block indicating the frequency-domain IQ samples). The outgoing signal can be transmitted to another wireless node using a fronthaul link.

[0117] As shown by reference numeral 656 in the attached figure (which illustrates splitting option 7-2), a relay node can process the incoming signal to determine the symbol (e.g., the IQ symbol of the occupied tone) for each antenna associated with the incoming signal. The relay node generates the outgoing signal by processing the symbols (e.g., the IQ symbols of the occupied tone) for each antenna and including them in the payload of the outgoing signal (e.g., by fully encoding a transport block indicating the symbols (e.g., the IQ symbols of the occupied tone) for each antenna). The outgoing signal can be transmitted to another wireless node using a fronthaul link.

[0118] As shown by reference numeral 658 in the attached figure (which illustrates splitting option 7-3), a relay node can process the incoming signal to determine the received codewords (e.g., LLR values, etc.) associated with the incoming signal. The relay node generates the outgoing signal by processing the received codewords and including them in the payload of the outgoing signal (e.g., by fully encoding the transport block indicating the received codewords). The outgoing signal can be transmitted to another wireless node using a fronthaul link.

[0119] As indicated by reference numeral 660 in the attached figure (which shows segmentation option 8), the relay node can process the incoming signal to determine the transport block associated with the incoming signal (e.g., the relay node can fully decode the incoming signal). The relay node generates the outgoing signal by processing the transport block and including it in the payload of the outgoing signal (e.g., by fully encoding the transport block). The outgoing signal can be transmitted to another wireless node using a fronthaul link.

[0120] The level of processing performed on incoming signals can be configured by a control node or another wireless node. Outgoing signals may include information about and / or from incoming signals, which is at least in part based on the level of processing performed by the relay node.

[0121] Figures 6A to 6B The number and arrangement of components shown are provided as an example. In reality, with... Figures 6A to 6B Compared to the components shown, there may be additional components, fewer components, different components, or components arranged in a different manner. Furthermore, Figures 6A to 6B The two or more components shown can be implemented within a single component, or Figures 6A to 6B The single component shown can be implemented as multiple distributed components. Alternatively, Figures 6A to 6B The set of components shown (e.g., one or more components) can perform actions described by Figures 6A to 6B The other set of components shown performs one or more functions.

[0122] Figure 7 This is a diagram illustrating Example 700 of the IAB network architecture according to this disclosure.

[0123] like Figure 7 As shown, the IAB network may include an IAB donor 705 (shown as an IAB donor) connected to the core network via a wired connection (shown as a wired backhaul). For example, the Ng interface of the IAB donor 705 may terminate at the core network. Alternatively or additionally, the IAB donor 705 may connect to one or more devices in the core network that provide core access and mobility management functions (e.g., AMF). In some aspects, the IAB donor 705 may include a base station 110, such as an anchor base station communicating with the core network via a wired backhaul link (e.g., a fiber optic connection). As shown, the IAB donor 705 may include a central unit (CU) that performs access node controller (ANC) functions, AMF functions, etc. The CU may configure the DU of the IAB donor 705, and / or may configure one or more IAB nodes 710 (e.g., the MT and / or DU of the IAB node 710) connected to the core network via the IAB donor 705. Therefore, the CU of the IAB donor 705 can control and / or configure the entire IAB network connected to the core network via the IAB donor 705, for example, by using control messages and / or configuration messages (e.g., RRC configuration messages, F1 application protocol (F1AP) messages, etc.).

[0124] like Figure 7As further illustrated, the IAB network may include IAB nodes 710 (shown as IAB node 1, IAB node 2, and IAB node 3) connected to the core network via IAB donor 705. As shown, IAB node 710 may include MT functionality (sometimes also referred to as UE functionality (UEF)) and may include DU functionality (sometimes also referred to as Access Node functionality (ANF)). The MT functionality of IAB node 710 (e.g., a child node) may be controlled and / or scheduled by another IAB node 710 (e.g., the parent node of the child node) and / or by IAB donor 705. The DU functionality of IAB node 710 (e.g., the parent node) may control and / or schedule other IAB nodes 710 (e.g., the child node of the parent node) and / or UE 120. Therefore, DU may be referred to as a scheduling node or scheduling component, while MT may be referred to as a scheduled node or scheduled component. In some aspects, IAB donor 705 may include DU functionality but not MT functionality. In other words, the IAB donor 705 can configure, control, and / or schedule the communication of the IAB node 710 and / or the UE 120. The UE 120 may include only the MT function and not the DU function. That is, the communication of the UE 120 can be controlled and / or scheduled by the IAB donor 705 and / or the IAB node 710 (e.g., the parent node of the UE 120).

[0125] When a first node controls and / or schedules the communication of a second node (e.g., when the first node provides DU functionality for the MT function of the second node), the first node can be called the parent node of the second node, and the second node can be called the child node of the first node. The child node of the second node can be called the grandchild node of the first node. Therefore, the DU functionality of the parent node can control and / or schedule the communication of the parent node's child nodes. The parent node can be IAB donor 705 or IAB node 710, while the child node can be IAB node 710 or UE 120. The communication of the MT function of the child node can be controlled and / or scheduled by the child node's parent node.

[0126] like Figure 7 As further illustrated, the link between UE 120 (e.g., having only MT functionality and no DU functionality) and IAB donor 705, or between UE 120 and IAB node 710, can be referred to as access link 715. Access link 715 can be a radio access link, providing UE 120 with radio access to the core network via IAB donor 705 and optionally via one or more IAB nodes 710. Therefore, Figure 7 The IAB network architecture shown can be called a multi-hop network and / or a wireless multi-hop network, etc.

[0127] like Figure 7As further illustrated, the link between IAB donor 705 and IAB node 710, or between two IAB nodes 710, can be referred to as backhaul link 720. Backhaul link 720 can be a wireless backhaul link, providing radio access to the core network for IAB node 710 via IAB donor 705 and optionally via one or more other IAB nodes 710. In the IAB network, network resources used for wireless communication (e.g., time resources, frequency resources, spatial resources, etc.) can be shared between access link 715 and backhaul link 720. In some aspects, backhaul link 720 can be a primary backhaul link or a secondary backhaul link (e.g., a backup backhaul link). In some aspects, a secondary backhaul link can be used if the primary backhaul link fails, becomes congested, becomes overloaded, etc. For example, if the primary backhaul link between IAB node 2 and IAB node 1 fails, the backup link 725 between IAB node 2 and IAB node 3 can be used for backhaul communication. As used in this article, "node" or "wireless node" may refer to IAB donor 705 and / or IAB node 710, etc.

[0128] Therefore, in some communication systems such as 5G or NR, multi-hop networks, such as IAB networks, can be deployed to enable communication between wireless nodes in the network. Typically, wireless nodes deployed in a multi-hop network can be associated with a timing scheme or timing configuration that aligns communication between wireless nodes associated with different links. For example, one or more timing references can be used to identify a set of communication opportunities, such as a set of symbols or a set of time slots allocated to a set of channels. For example, in an IAB network, a timing reference may include downlink transmission timing for an upstream node (e.g., the DU of IAB donor 705 and / or the DU of IAB node 710) to transmit one or more downlink signals to a downstream node (e.g., the MT of UE 120 and / or sub-IAB node 710). Furthermore, a timing reference may include downlink receive timing for a downstream node to receive downlink signals from an upstream node, uplink transmission timing for a downstream node to transmit uplink signals to an upstream node, and / or uplink receive timing for an upstream node to receive uplink signals from a downstream node. Downlink transmission timing can typically be aligned across all upstream nodes and can tolerate threshold time misalignment of uplink transmission timing to account for different propagation delays and / or round-trip times between upstream and downstream nodes.

[0129] Some aspects described herein enable the timing framework to adjust various timing references for wireless forwarding nodes deployed in a multi-hop network (e.g., to extend the coverage of a base station and / or enable communication between two nodes that might otherwise be outside the range of wireless communication). For example, in some aspects, a wireless forwarding node can be configured to communicate with a first wireless node using a first timing reference configuration and with a second wireless node using a second timing reference configuration. For example, the first timing reference configuration may include timing references associated with transmitting and receiving signals from the first wireless node, and the second timing reference configuration may include timing references associated with transmitting and receiving signals from the second wireless node. In some aspects, the wireless forwarding node can establish transmit and receive timing references (e.g., symbol-level alignment) for the first and second timing reference configurations and can autonomously and / or based on one or more timing adjustment commands provided by a control node (e.g., based on timing estimation feedback provided to the control node) to adjust or fine-tune the transmit and receive timing references (e.g., at the sub-symbol level and / or sample level). In this way, adjusting the timing reference can increase the synchronization between different nodes in a multi-hop network, which can improve the accuracy of positioning, increase the number of hops supported in the multi-hop network, and / or reduce interference in the multi-hop network, etc.

[0130] As mentioned above, Figure 7 Provided as an example. Other examples may be related to... Figure 7 The descriptions are different.

[0131] Figure 8 This is a diagram illustrating example 800 associated with timing adjustments for a wireless remote unit according to this disclosure. Figure 8 As shown, Example 800 includes a wireless forwarding node configured to forward communication between an upstream wireless node (e.g., a base station DU, a donor node, or a parent node's DU and / or UE, etc.) and a downstream wireless node (e.g., a UE and / or a child node's MT, etc.). For example, as... Figure 8As shown, a wireless forwarding node may include an MT unit configured to receive downlink communication from an upstream wireless node and an RU (e.g., a repeater unit and / or a relay unit) configured to receive uplink communication from a downstream wireless node. Therefore, as described herein, a wireless forwarding node can use the MT unit to forward uplink communication to an upstream wireless node and can use the RU to forward downlink communication to a downstream wireless node. However, it should be understood that in some aspects, the MT unit may be used only to communicate with a control node (e.g., to transmit and / or receive signals related to controlling the operation of the wireless forwarding node), while the RU may be used to communicate with both upstream and downstream wireless nodes to perform data forwarding operations. Furthermore, while the aspects described herein relate to timing adjustment techniques that can be used to adjust or fine-tune the timing reference associated with forwarding downlink and uplink communication between the upstream and downstream wireless nodes, the same or similar techniques can be used for forwarding sidelink communication, downlink communication, and / or uplink communication in flat, non-hierarchical topologies.

[0132] like Figure 8 As shown, the MT of the wireless forwarding node can communicate with an upstream wireless node, which may correspond to a parent node or donor node that uses the wireless forwarding node to extend coverage. The RU of the wireless forwarding node can communicate with a downstream wireless node, which may correspond to a UE, a child node, or another node that communicates with the upstream wireless node through the wireless forwarding node. Therefore, to forward downlink signals to the downstream wireless node, the upstream wireless node can transmit the downlink signal to the MT of the wireless forwarding node, and the wireless forwarding node can perform digital processing on the downlink signal (e.g., depending on the segmentation options implemented by the RU) using a co-located RU and forward the downlink signal to the downstream wireless node. Furthermore, a similar technique can be used for uplink forwarding, where the downstream wireless node can transmit the uplink signal to the RU of the wireless forwarding node, the RU can perform digital processing on the uplink signal (e.g., depending on the segmentation options implemented by the RU), and then use the MT to forward the uplink signal to the upstream wireless node.

[0133] Therefore, in some aspects, a first timing reference configuration may define a timing reference for the MT to receive downlink signals from an upstream radio node and to transmit uplink signals to an upstream radio node, and a second timing reference configuration may define a timing reference for the RU to transmit downlink signals to a downstream radio node and to receive uplink signals from a downstream radio node. For example, as described further in detail herein, the timing reference configuration may typically indicate the alignment (e.g., symbol-level alignment) of one or more symbol boundaries associated with a radio forwarding node forwarding downlink communication from an upstream radio node to a downstream radio node, forwarding uplink communication from a downstream radio node to an upstream radio node, and so on. In some aspects, the symbol-level alignment may then be fine-tuned or otherwise adjusted based on estimated timing offsets, timing estimation feedback, timing adjustment commands, etc. (e.g., to account for the digital processing delay of the radio forwarding node, the propagation delay between the radio forwarding node and the upstream and / or downstream radio nodes, etc.).

[0134] For example, such as Figure 8 As shown by reference numeral 810, a radio forwarding node can track downlink reception timing (e.g., symbol-level alignment) for receiving downlink signals from an upstream radio node based on one or more reference signals transmitted by a donor node (e.g., an upstream radio node). In this case, the components of the radio forwarding node that communicate with the donor node (e.g., the MT and / or RU of the radio forwarding node) can determine the downlink reception timing according to IAB rules generally applicable to UEs. For example, the downlink reception timing associated with the radio forwarding node can be offset (e.g., delayed) relative to the downlink transmission timing of the upstream radio node, and said offset can be based at least in part on the propagation delay between the upstream radio node and the radio forwarding node. For example, in some aspects, the upstream radio node can be configured to transmit one or more downlink reference signals (e.g., SSB, Channel State Information Reference Signal (CSI-RS), DMRS, Tracking Reference Signal (TRS), etc.), and the MT of the radio forwarding node can track the downlink reception timing based on the time when the downlink reference signal is received.

[0135] like Figure 8As further shown by reference numeral 820, the wireless relay node can adjust the uplink transmission timing for transmitting signals (e.g., forwarded uplink signals) to the upstream wireless node, at least in part, based on one or more timing advance commands received from the control node. For example, the upstream wireless node can allow uplink transmissions to be received at the upstream wireless node within a threshold time before or after a symbol boundary aligned with its downlink transmission timing. Thus, the uplink transmission of the wireless relay node can be scheduled to occur before the symbol boundary based on the propagation delay between the upstream wireless node and the wireless relay node, which can be determined based on δ between the downlink transmission timings of the upstream wireless node and the wireless relay node. In some aspects, the wireless relay node can receive timing advance commands from the control node, which can instruct the wireless relay node to advance the uplink transmission timing by an amount of time (e.g., based on timing estimation feedback provided to the control node, which indicates the propagation delay and / or round-trip time between the upstream wireless node and the wireless relay node). In this way, the uplink transmission timing can be adjusted (e.g., advanced) relative to the downlink transmission timing of the upstream wireless node, so that the upstream wireless node receives the uplink signal transmitted by the wireless relay node within a threshold time of the symbol boundary aligned with the downlink timing of the upstream wireless node.

[0136] like Figure 8As further shown by reference numeral 830, the wireless forwarding node can set a transmission timing reference and / or a reception timing reference for communicating with downstream nodes according to a selected timing mode. In some aspects, the selected timing mode may be pre-configured (e.g., defined in a wireless communication standard, based on stored configuration information, based on the type or configuration of the wireless forwarding node, etc.), or the selected timing mode may be signaled to the wireless forwarding node or otherwise configured by a control node (e.g., an upstream wireless node or another node separate from the upstream wireless node). For example, in some aspects, the wireless forwarding node may set the downlink transmission timing to be aligned with the downlink transmission timing of the upstream wireless node (e.g., such that the downlink transmissions of all network nodes are symbol-level aligned). Alternatively or additionally, where the wireless forwarding node supports near-zero latency forwarding (e.g., in cases where the RU implementation results in a segmentation option that causes digital processing latency to be less than or equal to, or otherwise satisfies, a threshold), the wireless forwarding node may align the downlink or uplink transmission timing with the downlink or uplink reception timing plus ε, where ε represents the digital processing latency of the wireless forwarding node. Alternatively, where the wireless forwarding node supports concurrent communication or uses enhanced duplexing with spatial division multiplexing (SDM) and / or full-duplex (FD), the wireless forwarding node can align the timing of concurrent communication to mitigate interference. In another example, where the wireless forwarding node uses guard periods to switch between time-division multiplexed (TDMed) transmit and receive operations on adjacent time resources, the wireless forwarding node can align transmit and receive timings (e.g., downlink receive timing and downlink transmit timing) to reduce guard periods.

[0137] like Figure 8 As further illustrated by reference numeral 840, the radio forwarding node can autonomously and / or based on one or more timing advance commands received from the control node to adjust the transmit timing and / or receive timing for communication with downstream radio nodes. For example, as described above, the radio forwarding node can set the downlink transmit timing and uplink receive timing for communication between the RU and downstream radio nodes according to a selected timing mode, which may refer to the symbol-level alignment of the RU's downlink transmit timing and uplink receive timing. As described in more detail herein, the radio forwarding node can then fine-tune or otherwise adjust the RU's downlink transmit timing and / or uplink receive timing to align the downlink transmit timing and / or uplink receive timing at the sub-symbol level, sample level, etc.

[0138] For example, regarding downlink transmission timing for forwarding downlink signals to downstream wireless nodes, the wireless forwarding node can adjust the downlink transmission timing of its RU based on one or more timing adjustment commands received from a control node (e.g., a donor node, such as an upstream wireless node). In some aspects, the timing adjustment command received from the control node can indicate a time δ value (e.g., T_δ) to adjust the downlink transmission timing of the wireless forwarding node's RU, wherein the time δ value can indicate information that the wireless forwarding node's RU can use to calculate the round-trip time to the upstream wireless node. For example, the time δ value can indicate the tolerable misalignment between the upstream wireless node's uplink receive timing and the symbol boundary aligned with the upstream wireless node's downlink transmission timing. Therefore, the wireless forwarding node can determine the round-trip time between the wireless forwarding node and the upstream wireless node based on the time δ value in conjunction with a timing advance command used to set the uplink transmission timing toward the upstream wireless node.

[0139] Furthermore, regarding the uplink receive timing for receiving uplink signals (to be forwarded to an upstream wireless node) from a downstream wireless node, the wireless forwarding node can be configured to autonomously adjust the uplink receive timing relative to another timing reference (e.g., downlink transmission timing) within a window. For example, in some aspects, the size of the window can be a fixed value (e.g., the number of symbols, time slots, etc.), or the size of the window can be configured by an Operations, Administration, and Maintenance (OAM) entity or indicated (e.g., dynamically or semi-statically) by a control node that controls the operation of the wireless forwarding node. For example, as mentioned above, the upstream wireless node can tolerate a threshold misalignment between its downlink transmission timing and uplink receive timing. This allows the wireless forwarding node to autonomously determine within this window the uplink receive timing for receiving uplink signals from the downstream wireless node (e.g., the uplink receive timing can be adjusted within this window to ensure that the wireless forwarding node receives the uplink signal at a time that allows the uplink signal to be digitally processed, forwarded to the upstream wireless node, and received by the upstream wireless node within a threshold time of a symbol boundary aligned with the upstream wireless node's downlink transmission timing). In this way, the wireless relay node can move the FFT window, which determines when the wireless relay node collects and begins processing samples of the uplink signal. Therefore, the wireless relay node can determine a window within which it can autonomously adjust the uplink receive timing relative to another timing reference (e.g., within 500 nanoseconds of the downlink transmission timing), and can autonomously adjust the uplink receive timing accordingly.

[0140] As mentioned above, Figure 8 Provided as an example. Other examples may be related to... Figure 8 The descriptions are different.

[0141] Figure 9This is a diagram illustrating example 900 associated with timing adjustments for a wireless remote unit according to this disclosure. Figure 9 As shown, Example 900 includes a forwarding node that can receive incoming signals from a transmitter node, perform one or more repeater or relay operations to process the incoming signals, and forward the signals to a receiver node. As described herein, Example 900 relates to one or more techniques that the forwarding node can use to adjust the FFT window timing associated with the incoming signals received from the transmitter node. For example, in some aspects, the incoming signal may be an uplink signal when the transmitter node is a downstream radio node, a downlink signal when the transmitter node is an upstream radio node, or a sidelink signal when the transmitter node and receiver node are UEs communicating via a sidelink.

[0142] like Figure 9 As shown by reference numeral 910, a forwarding node can receive an incoming signal to be forwarded from a transmitting node. As shown by reference numeral 912, the incoming signal can be associated with a power delay distribution comprising multiple channel taps received at different times. For example, in some aspects, the incoming signal can propagate from the transmitting node to the forwarding node via different paths with different propagation delays, based on one or more clusters (e.g., reflectors) in the wireless channel between the transmitting and forwarding nodes. Thus, multiple channel taps can correspond to different copies of the incoming signal, which are typically identical but time-shifted relative to each other. For example, a first copy of the incoming signal may include a series of symbols (e.g., curves or parabolas), each symbol beginning with a cyclic prefix (e.g., a slash), and a second copy of the incoming signal may typically be identical to the first copy but time-delayed. Typically, at the receiving port of the forwarding node, the incoming signal can be received as a superimposed transmission (e.g., the sum of the different copies of the incoming signal). Typically, the forwarding node may need to determine an FFT window within which samples of the incoming signal are collected for processing and forwarding to the receiving node.

[0143] Therefore, in some aspects, a forwarding node can adjust the timing of the FFT window of the incoming signal (e.g., receive timing) to minimize distortion and capture the maximum channel power in the regenerated waveform forwarded to the receiver node. For example, reference numeral 914 shows an FFT window aligned with the timing of a first (earlier) channel tap, and reference numeral 916 shows an FFT window aligned with the timing of a second (delayed) channel tap. In particular, a forwarding node can typically capture samples of the incoming signal within an FFT window that begins after a cyclic prefix. Thus, if the FFT window is aligned with the timing of the first (earlier) channel tap, as shown in reference numeral 914, the samples captured by the forwarding node can include a series of symbols associated with a first copy of the incoming signal and a portion of a second copy of the incoming signal (e.g., a cyclically shifted or delayed version of the first copy). Therefore, the regenerated waveform can be distortion-free and can have a clean cyclic pattern that can be received and decoded by the receiver node. However, if the FFT window is aligned with the timing of the second (later) channel tap, as indicated by reference numeral 916, the sample captured by the forwarding node from the first copy of the incoming signal may include portions of the symbols that overlap with the FFT window aligned with the second (later) channel tap, as well as the beginning portion of the next symbol (e.g., a cyclic prefix). Therefore, the regenerated waveform may be distorted, as indicated by reference numeral 918 (e.g., the sum of the two signals includes portions of different symbols, which may cause reception and / or decoding problems at the receiver node).

[0144] Therefore, as indicated by reference numeral 920 in the accompanying drawings, a forwarding node can regenerate the incoming signal (e.g., when the forwarding node is implemented as a repeater unit), and / or can generate a new signal including information from and / or about the incoming signal (e.g., when the forwarding node is implemented as a relay unit), the new signal having a cyclic prefix aligned with the earliest valid channel tap (e.g., the earliest channel tap that satisfies a threshold). In other words, at the sub-symbol level, the forwarding node can determine an FFT window timing aligned with the cyclic prefix of the earliest valid channel tap (e.g., starting after said cyclic prefix) to capture maximum channel power, reduce distortion in the forwarded signal, and so on. Furthermore, as described herein, the forwarding node can employ various techniques to fine-tune or otherwise adjust the downlink receive timing and / or uplink receive timing of the forwarding node to determine the FFT window timing such that the cyclic prefix of the forwarded signal is aligned with the earliest valid channel tap.

[0145] For example, in some aspects, a forwarding node can be configured to adjust the downlink receive timing when the forwarding node includes an RU implemented as a repeater unit that does not fully decode the downlink signal. Otherwise, when the repeater unit is configured to fully decode the downlink signal (e.g., implementing split option 6) or the RU is implemented as a relay unit that always fully decodes the downlink signal, any time misalignment between different channel taps can be resolved through the decoding process (e.g., through channel estimation, channel equalization, etc.). In this case, any distortion in the incoming signal will not be propagated to the next hop. However, when the RU is a repeater unit that does not fully decode the incoming downlink signal to be forwarded to the receiver node, it may be necessary to adjust the downlink receive timing (e.g., the FFT window timing for processing samples of the incoming downlink signal) to align the cyclic prefix with the earliest valid channel tap, thereby avoiding additional impairment to the forwarded signal.

[0146] Therefore, in some respects, the downlink receive timing of the forwarding node can be tracked and / or adjusted by the MT of the forwarding node (e.g., to match the above reference). Figure 8 (Similar to the described approach). For example, the MT can receive downlink reference signal transmissions from the transmitter node and can track downlink reception timing at least in part based on the downlink reference signal transmissions. Alternatively, the forwarding node can be instructed (e.g., periodically instructed by the transmitter node and / or control node) to forward the received downlink signal back to the transmitter node, allowing the transmitter node to estimate the timing offset and send a timing adjustment command for the downlink reception timing to the RU of the forwarding node. For example, the RU can be configured with a fixed FFT window for processing, regenerating the downlink signal, and forwarding it back to the transmitter node. The transmitter node can then analyze the downlink signal forwarded by the forwarding node and can determine an appropriate adjustment to the downlink reception timing based on the presence and / or timing of any distortions in the forwarded signal.

[0147] In this way, when the MT of the forwarding node is out-of-band, the downlink receive timing can be adjusted so that the cyclic prefix of the forwarded downlink signal is aligned with the earliest valid channel tap by forwarding the downlink signal back to the transmitter node and having the transmitter node transmit a timing adjustment command to adjust the downlink receive timing. For example, the MT of the forwarding node may be out-of-band when the MT only exchanges control messages with the control node and the control communication is in a different frequency band or frequency range (e.g., below 6 GHz) than the frequency band or frequency range used to transmit the downlink signal (e.g., FR2). In this case, the MT may not be able to track the downlink receive timing of the RU (e.g., because timing may differ at different frequencies), so periodically forwarding the downlink signal back to the transmitter node can allow the downlink receive timing of the RU to be properly tuned or adjusted. Alternatively, if the transmitter node uses a wideband signal to achieve more accurate time estimation, the transmitter node may instruct the forwarding node to forward the downlink signal back to the transmitter node. For example, even when the MT communication is in-band (e.g., in the same frequency band as the downlink communication), the MT communication may be restricted to a narrow bandwidth portion because the MT communication may only involve the exchange of control messages. Therefore, the transmitter node can send broadband downlink signals to the relay node and instruct the relay node to forward the broadband downlink signals back to the transmitter node, so as to estimate the timing offset more accurately than MT.

[0148] In some respects, when the transmitter node is a UE and the incoming signal is an uplink signal, the uplink receive timing can be adjusted to account for the power delay distribution including multiple channel taps, regardless of whether the RU is implemented as a repeater unit or a relay unit. For example, relay units and repeater units can be configured to forward uplink signals without fully decoding the incoming uplink signal (unless the relay unit or repeater unit implements Segmentation Option 6). Therefore, the forwarding node can implement techniques to adjust the uplink receive timing (e.g., the FFT window timing for capturing samples) to ensure that the cyclic prefix of the forwarded uplink signal is aligned with the earliest valid channel tap.

[0149] For example, in some aspects, the RU of the forwarding node may have a fixed uplink receive timing, and the control node (e.g., the DU of the receiver node and / or a separate control node) may estimate the timing offset based on the forwarded uplink signal. In this case, the control node may transmit a new uplink transmit timing advance command to the transmitter node (e.g., the UE) and / or transmit a new uplink receive timing adjustment command to the RU of the forwarding node based on the timing offset. Alternatively, the RU of the forwarding node may have the capability to track the uplink receive timing by processing one or more uplink reference signal transmissions (e.g., sounding reference signal (SRS) transmissions, uplink DMRS transmissions, etc.). In this case, the RU may autonomously adjust the uplink receive timing within a limited window (e.g., to match the above reference). Figure 8 (Similar to the described method). Alternatively or concurrently, the RU of the forwarding node may indicate an estimated timing offset to the DU (e.g., in DCI and / or MAC-CE), and the control node may use the estimated timing offset to adjust the uplink transmission timing of the transmitter node (e.g., UE) and / or the uplink reception timing of the RU of the forwarding node.

[0150] As mentioned above, Figure 9 Provided as an example. Other examples may be related to... Figure 9 The descriptions are different.

[0151] Figure 10 This is a diagram illustrating example 1000 associated with timing adjustments for a wireless remote unit according to this disclosure. Figure 10 As shown, Example 1000 includes a forwarding node capable of forwarding communication between a first wireless node and a second wireless node. Furthermore, as shown, Example 1000 includes a control node capable of controlling the forwarding operation of the forwarding node. In some aspects, the control node may be the same as either the first or second wireless node (e.g., a network node using the forwarding node to extend coverage), or the control node may be different from both the first and second wireless nodes. In some aspects, the first wireless node may correspond to a network node (e.g., a base station DU) and the second wireless node may correspond to a UE, or vice versa, or the first and second wireless nodes may correspond to individual UEs communicating on a sidelink.

[0152] like Figure 10 As shown by reference numeral 1010, the control node can receive timing estimation feedback associated with one or more timing reference configurations used by the forwarding node to forward communication between the first and second wireless nodes. For example, in some aspects, the one or more timing reference configurations may include a first receive timing for receiving an incoming signal from the first wireless node to be forwarded to the second wireless node, a second receive timing for receiving an incoming signal from the second wireless node to be forwarded to the first wireless node, a first transmission timing for forwarding a signal received from the second wireless node to the first wireless node, and / or a second transmission timing for forwarding a signal received from the first wireless node to the second wireless node. In some aspects, as shown, the control node can receive timing estimation feedback from the forwarding node. Alternatively or additionally, the control node can receive timing estimation feedback from the first and / or second wireless nodes communicating via the forwarding node on an uplink, downlink, or sidelink, etc.

[0153] In some respects, forwarding nodes can use the above information regarding... Figures 8 to 9One or more techniques are described in further detail to establish symbol-level receive timing and symbol-level transmit timing for communication with the first wireless node and / or the second wireless node. Therefore, timing estimation feedback received by the control node may include one or more estimated timing offsets determined by the forwarding node, the first wireless node, and / or the second wireless node. The control node can use these one or more estimated timing offsets to determine one or more adjustments (e.g., sub-symbol adjustments) to one or more of the symbol-level receive timing and / or symbol-level transmit timing used by the forwarding node for communication with the first wireless node and / or the second wireless node. Alternatively or additionally, the timing estimation feedback may include information associated with one or more transmissions (e.g., information associated with received downlink signals forwarded back to the transmitter node), which the control node can use to estimate timing offsets for adjusting one or more of the symbol-level receive timing and / or symbol-level transmit timing used by the forwarding node for communication with the first wireless node and / or the second wireless node.

[0154] like Figure 10 As further shown by reference numeral 1020, the control node can transmit one or more timing adjustment commands to the forwarding node to fine-tune or otherwise adjust one or more of the symbol-level receive timing and / or symbol-level transmit timing used by the forwarding node to communicate with the first and / or second wireless nodes. For example, the timing adjustment command may instruct an FFT window timing used to adjust the downlink and / or uplink receive timing to align the cyclic prefix of the forwarded signal with the earliest valid channel tap (e.g., in cases where the incoming signal to be forwarded is associated with a power delay distribution comprising multiple channel taps received at different times). Alternatively or additionally, the timing adjustment command may be used to adjust the transmit timing used by the forwarding node to forward signals to the first and / or second wireless nodes at the sub-symbol level. Thus, as... Figure 10 As further shown by reference numeral 1030 in the accompanying drawings, the forwarding node can forward communication between the first wireless node and the second wireless node based on the timing adjustments indicated in the timing adjustment commands received from the control node.

[0155] As mentioned above, Figure 10 Provided as an example. Other examples may be related to... Figure 10 The descriptions are different.

[0156] Figure 11 This is a diagram illustrating an example process 1100 performed, for example, by a wireless forwarding node according to this disclosure. Example process 1100 is an example of an operation performed by a wireless forwarding node (e.g., forwarding node 310, forwarding node 405, etc.) in relation to timing adjustments of a wireless remote unit.

[0157] like Figure 11 As shown, in some aspects, process 1100 may include determining a first timing reference configuration (block 1110) for communicating with the first wireless node. For example, a wireless forwarding node (e.g., using...) Figure 14 The determining component 1408 described herein can determine a first timing reference configuration for communicating with the first wireless node, as described above.

[0158] like Figure 11 As further shown, in some aspects, process 1100 may include determining a second timing reference configuration (block 1120) for communicating with the second wireless node. For example, the wireless forwarding node (e.g., using...) Figure 14 The determining component 1408 described herein can determine a second timing reference configuration for communicating with the second wireless node, as described above.

[0159] like Figure 11 Further shown, in some aspects, process 1100 may include forwarding communication between a first wireless node and a second wireless node based at least in part on a first timing reference configuration and a second timing reference configuration (block 1130). For example, the wireless forwarding node (e.g., using...) Figure 14 The receiving component 1402 and / or transmitting component 1404 described herein can forward communication between the first wireless node and the second wireless node, at least in part, based on the first timing reference configuration and the second timing reference configuration, as described above.

[0160] Process 1100 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0161] In a first aspect, determining the first timing reference configuration includes determining a reception timing for receiving one or more signals from the first wireless node based at least in part on one or more reference signal transmissions received from the first wireless node, and / or determining a transmission timing for forwarding one or more signals to the first wireless node based at least in part on one or more timing advance commands received from the control node or the first wireless node.

[0162] In a second aspect, either alone or in combination with the first aspect, determining the reception timing includes receiving a signal from a first wireless node, forwarding the signal back to the first wireless node, and receiving a timing adjustment command for the reception timing from the first wireless node or a control node, the timing adjustment command indicating at least in part based on an estimated timing offset of the signal forwarded back to the first wireless node.

[0163] In a third aspect, either alone or in combination with one or more of the first and second aspects, the second timing reference configuration includes one or more of the following: transmission timing for forwarding one or more signals from the first wireless node to the second wireless node, and / or reception timing for receiving one or more signals to be forwarded to the first wireless node from the second wireless node.

[0164] In the fourth aspect, either alone or in combination with one or more of the first to third aspects, the transmission timing is based at least in part on timing adjustment commands received from the control node or the first wireless node and / or the round-trip time between the wireless forwarding node and the first wireless node.

[0165] In the fifth aspect, either alone or in combination with one or more of the first to fourth aspects, the receiving timing has a fixed value and / or has a value at least in part based on a timing adjustment command received from the first wireless node.

[0166] In the sixth aspect, either alone or in combination with one or more of the first to fifth aspects, the receiving timing is autonomously determined within a window relative to another timing reference.

[0167] In the seventh aspect, either alone or in combination with one or more of the first to sixth aspects, the size of the window is fixed, pre-configured by the OAM entity, or dynamically indicated by the control node or the first wireless node.

[0168] In the eighth aspect, the reception timing is determined, either alone or in combination with one or more of the first to seventh aspects, at least in part, based on the transmission of one or more reference signals received from the second wireless node.

[0169] In the ninth aspect, alone or in combination with one or more of the first to eighth aspects, process 1100 includes transmitting information to a control node or a first wireless node indicating an estimated timing offset associated with the reception timing.

[0170] In the ninth aspect, either alone or in combination with one or more of the first to eighth aspects, process 1100 includes receiving information from a control node or a first wireless node indicating adjustments to the reception timing associated with the wireless forwarding node.

[0171] In the eleventh aspect, either alone or in combination with one or more of the first to tenth aspects, forwarding communication between the first wireless node and the second wireless node includes: receiving from the first wireless node a signal to be forwarded to the second wireless node, wherein the signal is associated with a power delay distribution comprising a plurality of channel taps received at different times; and forwarding the signal to the second wireless node using a cyclic prefix aligned with the earliest channel tap among the plurality of channel taps that satisfies a threshold.

[0172] In the twelfth aspect, either alone or in combination with one or more of the first to eleventh aspects, forwarding communication between a first wireless node and a second wireless node includes: receiving from the second wireless node a signal to be forwarded to the first wireless node, wherein the signal is associated with a power delay distribution comprising a plurality of channel taps received at different times; and forwarding the signal to the first wireless node using a cyclic prefix aligned with the earliest channel tap among the plurality of channel taps that satisfies a threshold.

[0173] although Figure 11 An example box of process 1100 is shown, but in some respects, process 1100 may include... Figure 11 The boxes depicted in the diagram may be additional boxes, fewer boxes, different boxes, or boxes arranged in a different manner. Alternatively, two or more boxes of process 1100 may be executed in parallel.

[0174] Figure 12 This is a diagram illustrating an example process 1200 performed, for example, by a control node according to this disclosure. Example process 1200 is an example of a control node (e.g., control node 410, etc.) performing operations associated with timing adjustments of a wireless remote unit.

[0175] like Figure 12 As shown, in some aspects, process 1200 may include determining adjustments to one or more timing reference configurations associated with a wireless forwarding node configured to forward communication between a first wireless node and a second wireless node (block 1210). For example, a control node (e.g., using...) Figure 15 The determining component 1508 described herein can determine adjustments to one or more timing reference configurations associated with a wireless forwarding node, which is configured to forward communication between a first wireless node and a second wireless node, as described above.

[0176] like Figure 12 As further shown, in some aspects, process 1200 may include transmitting one or more timing adjustment commands (block 1220) to a wireless forwarding node, indicating adjustments to one or more timing reference configurations. For example, a control node (e.g., using...) Figure 15 The transmission component 1504 described herein can transmit one or more timing adjustment commands to a wireless forwarding node, as described above, indicating adjustments to one or more timing reference configurations.

[0177] Process 1200 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0178] In a first aspect, one or more timing adjustment commands indicate that the adjustment will be applied to one or more of the following: a first receive timing associated with a wireless forwarding node receiving one or more signals to be forwarded to a second wireless node from a first wireless node; a first transmission timing associated with a wireless forwarding node forwarding one or more signals received from a first wireless node to a second wireless node; a second receive timing associated with a wireless forwarding node receiving one or more signals to be forwarded to a first wireless node from a second wireless node; or a second transmission timing associated with a wireless forwarding node forwarding one or more signals received from a second wireless node to a first wireless node.

[0179] In the second aspect, either alone or in combination with the first aspect, adjustments to one or more timing reference configurations are based at least in part on timing estimation feedback received from one or more of the radio forwarding nodes, the first radio node, or the second radio node.

[0180] In a third aspect, either alone or in combination with one or more of the first and second aspects, process 1200 includes transmitting one or more timing adjustment commands to one or more of the first or second wireless nodes, the one or more timing adjustment commands indicating adjustments to one or more timing reference configurations associated with communication with the wireless forwarding node.

[0181] although Figure 12 An example box of process 1200 is shown, but in some respects, process 1200 may include... Figure 12 The boxes depicted in the diagram may be additional boxes, fewer boxes, different boxes, or boxes arranged in a different manner. Alternatively, two or more boxes of process 1200 may be executed in parallel.

[0182] Figure 13 This is a diagram illustrating an example process 1300 performed, for example, by a transmitter node according to this disclosure. Example process 1300 is an example of an operation performed by a transmitter node (e.g., base station 110, UE 120, first wireless node 305, wireless node 415 and / or 420, etc.) associated with timing adjustments of a wireless remote unit.

[0183] like Figure 13 As shown, in some aspects, process 1300 may include transmitting a signal to be forwarded to a wireless receiver node to a wireless forwarding node, wherein the wireless forwarding node is associated with a reception timing for receiving the signal from a transmitter node (block 1310). For example, the transmitter node (e.g., using...) Figure 16 The transmission component 1604 described herein can transmit a signal to be forwarded to a wireless receiver node to a wireless forwarding node, wherein the wireless forwarding node is associated with a reception timing for receiving a signal from a transmitter node, as described above.

[0184] like Figure 13 Further, as shown, in some aspects, process 1300 may include determining an estimated timing offset (box 1320) to be applied to the receive timing associated with the wireless forwarding node, at least in part, based on the wireless forwarding node forwarding the signal back to the transmitter node. For example, the transmitter node (e.g., using...) Figure 16 The determining component 1608 described herein can determine, at least in part, the estimated timing offset to be applied to the receive timing associated with the wireless forwarding node based on the wireless forwarding node forwarding the signal back to the transmitter node, as described above.

[0185] like Figure 13 Further, in some aspects, process 1300 may include transmitting a timing adjustment command to a wireless relay node, the timing adjustment command indicating an estimated timing offset to be applied to the reception timing (box 1330). For example, a transmitter node (e.g., using...) Figure 16 The transmission component 1604 described herein can transmit a timing adjustment command to a wireless forwarding node, the timing adjustment command indicating an estimated timing offset to be applied to the receiving timing, as described above.

[0186] Process 1300 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0187] In a first aspect, process 1300 includes transmitting an instruction to a wireless forwarding node to forward a signal back to a transmitter node, and receiving the forwarded signal from the wireless forwarding node at least in part based on the instruction.

[0188] In the second aspect, either alone or in combination with the first aspect, the signal is a broadband signal.

[0189] although Figure 13 An example box of process 1300 is shown, but in some respects, process 1300 may include... Figure 13 The boxes depicted in the diagram may be additional boxes, fewer boxes, different boxes, or boxes arranged in a different manner. Alternatively, two or more boxes of process 1300 may be executed in parallel.

[0190] Figure 14This is a block diagram of an example device 1400 for wireless communication. Device 1400 may be a wireless forwarding node, such as a repeater node and / or a relay node, or a wireless forwarding node may include device 1400. In some aspects, device 1400 includes a receiving component 1402 and a transmitting component 1404 that can communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, device 1400 can use the receiving component 1402 and the transmitting component 1404 to communicate with another device 1406 (e.g., a UE, a base station, a control node, or another wireless communication device). As further shown, device 1400 may include a determining component 1408, etc.

[0191] In some respects, device 1400 can be configured to perform the functions described in this article. Figures 8 to 10 One or more operations described herein. Alternatively or concurrently, device 1400 may be configured to perform one or more processes described herein, such as... Figure 11 The process 1100. In some respects, Figure 14 The device 1400 and / or one or more components shown may include the above-described combination. Figure 2 The described UE and / or base station components, one or more. Alternatively or additionally, Figure 14 One or more components shown can be combined on top. Figure 2 , Figure 4 , Figure 5 , Figure 6A and / or Figure 6B The components described are implemented within one or more of the components. Alternatively, one or more of the components in a set may be implemented at least partially as software stored in memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the function or operation of said component.

[0192] Receiver 1402 may receive communications from device 1406, such as reference signals, control information, data communications, or combinations thereof. Receiver 1402 may provide the received communications to one or more other components of device 1406. In some aspects, receiver 1402 may perform signal processing on the received communications (e.g., filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, etc.) and may provide the processed signal to one or more other components of device 1406. In some aspects, receiver 1402 may include the above-described combinations... Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6A and / or Figure 6BThe described UE, base station and / or forwarding node includes one or more antennas, demodulators, MIMO detectors, receive processors, controllers / processors, memories, Rx chains or combinations thereof.

[0193] The transmission component 1404 can transmit communications, such as reference signals, control information, data communications, or combinations thereof, to the device 1406. In some aspects, one or more other components of the device 1406 can generate communications and provide the generated communications to the transmission component 1404 for transmission to the device 1406. In some aspects, the transmission component 1404 can perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, etc.) on the generated communications and can transmit the processed signals to the device 1406. In some aspects, the transmission component 1404 may include the above-described combinations... Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6A and / or Figure 6B The described UE, base station, and / or relay node include one or more antennas, modulators, transmit MIMO processors, transmit processors, controllers / processors, memories, Tx chains, or combinations thereof. In some aspects, transmit component 1404 may be co-located with receive component 1402 in a transceiver.

[0194] The determining component 1408 can determine a first timing reference configuration for communicating with the first wireless node, and can determine a second timing reference configuration for communicating with the second wireless node. In some aspects, the determining component 1408 may include the combination of the above. Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6A and / or Figure 6B The described UE, base station, and / or forwarding node include one or more antennas, demodulators, MIMO detectors, receive processors, modulators, transmit MIMO processors, transmit processors, controllers / processors, memories, or combinations thereof. Receive component 1402 and / or transmit component 1404 can forward communications between a first wireless node and a second wireless node, at least in part based on a first timing reference configuration and a second timing reference configuration.

[0195] The determining component 140 may determine the reception timing for receiving one or more signals from the first wireless node based at least in part on one or more reference signal transmissions received from the first wireless node, and may determine the transmission timing for forwarding one or more signals to the first wireless node based at least in part on one or more timing advance commands received from the control node or the first wireless node.

[0196] The receiving component 1402 can receive signals from the first wireless node. The transmitting component 1404 can forward the signals back to the first wireless node. The receiving component 1402 can receive timing adjustment commands for receiving timing from the first wireless node or a control node, the timing adjustment commands indicating at least in part based on an estimated timing offset of the signal forwarded back to the first wireless node.

[0197] The transmission component 1404 can transmit information indicating an estimated timing offset associated with the reception timing to the control node or the first wireless node.

[0198] The receiving component 1402 can receive information from the control node or the first wireless node indicating adjustments to the receiving timing associated with the wireless forwarding node.

[0199] The receiving component 1402 can receive a signal to be forwarded to a second wireless node from a first wireless node, wherein the signal is associated with a power delay distribution comprising a plurality of channel taps received at different times. The transmitting component 1404 can forward the signal to the second wireless node using a cyclic prefix aligned with the earliest channel tap among the plurality of channel taps that satisfies a threshold.

[0200] The receiving component 1402 can receive a signal to be forwarded to the first wireless node from the second wireless node, wherein the signal is associated with a power delay distribution comprising a plurality of channel taps received at different times. The transmitting component 1404 can forward the signal to the first wireless node using a cyclic prefix aligned with the earliest channel tap among the plurality of channel taps that satisfies a threshold.

[0201] Figure 14 The number and arrangement of components shown are provided as an example. In reality, with... Figure 14 Compared to the components shown, there may be additional components, fewer components, different components, or components arranged in a different manner. Furthermore, Figure 14 The two or more components shown can be implemented within a single component, or Figure 14 The single component shown can be implemented as multiple distributed components. Alternatively, Figure 14 The set (one or more components) shown can perform actions described by Figure 14 The other set of components shown performs one or more functions.

[0202] Figure 15This is a block diagram of an example device 1500 for wireless communication. Device 1500 may be a control node, or a control node may include device 1500. In some aspects, device 1500 includes a receiving component 1502 and a transmitting component 1504 that can communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, device 1500 can use the receiving component 1502 and the transmitting component 1504 to communicate with another device 1506 (such as a UE, base station, wireless forwarding node, or another wireless communication device). As further shown, device 1500 may include a determining component 1508, etc.

[0203] In some respects, device 1500 can be configured to perform the functions described in this article. Figures 8 to 10 The described one or more operations. Alternatively or concurrently, device 1500 may be configured to perform one or more of the procedures described herein, such as... Figure 12 Process 1200 or a combination of these processes. In some respects, Figure 15 The device 1500 and / or one or more components shown may include the above-described combination. Figure 2 One or more components of the described base station and / or network controller. Alternatively or concurrently, Figure 15 One or more components shown can be combined on top. Figure 2 The components described are implemented within one or more of the components. Alternatively, one or more of the components in a set may be implemented at least partially as software stored in memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the function or operation of said component.

[0204] Receiver 1502 may receive communications from device 1506, such as reference signals, control information, data communications, or combinations thereof. Receiver 1502 may provide the received communications to one or more other components of device 1506. In some aspects, receiver 1502 may perform signal processing on the received communications (e.g., filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, etc.) and may provide the processed signal to one or more other components of device 1506. In some aspects, receiver 1502 may include the above-described combinations. Figure 2 and / or Figure 4 The base station, network controller, and / or control node described includes one or more antennas, demodulators, MIMO detectors, receiver processors, controllers / processors, memories, communication units, or combinations thereof.

[0205] The transmission component 1504 can transmit communications, such as reference signals, control information, data communications, or combinations thereof, to the device 1506. In some aspects, one or more other components of the device 1506 can generate communications and provide the generated communications to the transmission component 1504 for transmission to the device 1506. In some aspects, the transmission component 1504 can perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, etc.) on the generated communications and can transmit the processed signals to the device 1506. In some aspects, the transmission component 1504 may include the above-described combinations... Figure 2 and / or Figure 4 The described base station, network controller, and / or control node includes one or more antennas, modulators, transmit MIMO processors, transmit processors, controllers / processors, memories, communication units, or combinations thereof. In some aspects, transmit component 1504 may be co-located with receive component 1502 in a transceiver.

[0206] Determining component 1508 can determine adjustments to one or more timing reference configurations associated with a wireless forwarding node configured to forward communication between a first wireless node and a second wireless node. In some aspects, determining component 1508 may include the above-described combination Figure 2 and / or Figure 4 The described base station, network controller, and / or control node includes one or more antennas, demodulators, MIMO detectors, receiver processors, controllers / processors, memory, communication units, or combinations thereof. Transmitter component 1504 can transmit one or more timing adjustment commands to the radio relay node, indicating adjustments to one or more timing reference configurations.

[0207] The transmission component 1504 can transmit one or more timing adjustment commands to one or more of the first or second wireless nodes, the one or more timing adjustment commands indicating adjustments to one or more timing reference configurations associated with communication with the wireless forwarding node.

[0208] Figure 15 The number and arrangement of components shown are provided as an example. In reality, with... Figure 15 Compared to the components shown, there may be additional components, fewer components, different components, or components arranged in a different manner. Furthermore, Figure 15 The two or more components shown can be implemented within a single component, or Figure 15 The single component shown can be implemented as multiple distributed components. Alternatively, Figure 15 The set (one or more components) shown can perform actions described by Figure 15 The other set of components shown performs one or more functions.

[0209] Figure 16 This is a block diagram of an example device 1600 for wireless communication. Device 1600 may be a transmitter node (e.g., a base station and / or a UE), or a transmitter node may include device 1600. In some aspects, device 1600 includes a receiving component 1602 and a transmitting component 1604 that can communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, device 1600 can use the receiving component 1602 and the transmitting component 1604 to communicate with another device 1606 (e.g., a UE, a base station, a wireless forwarding node, a control node, or another wireless communication device). As further shown, device 1600 may include a determining component 1608, etc.

[0210] In some respects, device 1600 can be configured to perform the functions described in this article. Figures 8 to 10 One or more operations described herein. Alternatively or concurrently, device 1600 may be configured to perform one or more procedures described herein, such as... Figure 13 Process 1300 or a combination of these processes. In some respects, Figure 16 The device 1600 and / or one or more components shown may include the above-described combination. Figure 2 The described base station and / or one or more components of the UE. Alternatively or concurrently, Figure 16 One or more components shown can be combined on top. Figure 2 The components described are implemented within one or more of the components. Alternatively, one or more of the components in a set may be implemented at least partially as software stored in memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the function or operation of said component.

[0211] Receiver 1602 may receive communications from device 1606, such as reference signals, control information, data communications, or combinations thereof. Receiver 1602 may provide the received communications to one or more other components of device 1606. In some aspects, receiver 1602 may perform signal processing on the received communications (e.g., filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, etc.) and may provide the processed signal to one or more other components of device 1606. In some aspects, receiver 1602 may include the above-described combinations... Figure 2 The described base station and / or UE includes one or more antennas, demodulators, MIMO detectors, receiver processors, controllers / processors, memory, or combinations thereof.

[0212] The transmission component 1604 can transmit communications, such as reference signals, control information, data communications, or combinations thereof, to the device 1606. In some aspects, one or more other components of the device 1606 can generate communications and provide the generated communications to the transmission component 1604 for transmission to the device 1606. In some aspects, the transmission component 1604 can perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, etc.) on the generated communications and can transmit the processed signals to the device 1606. In some aspects, the transmission component 1604 may include the above-described combinations... Figure 2 The described base station and / or UE includes one or more antennas, modulators, transmit MIMO processors, transmit processors, controllers / processors, memories, or combinations thereof. In some aspects, transmit component 1604 may be co-located with receive component 1602 in a transceiver.

[0213] The transmission component 1604 can transmit a signal to be forwarded to a wireless receiver node to a wireless relay node, wherein the wireless relay node is associated with a reception timing for receiving a signal from a wireless transmitter node. The determination component 1608 can determine an estimated timing offset to be applied to the reception timing associated with the wireless relay node, based at least in part on the wireless relay node forwarding the signal back to the wireless transmitter node. In some aspects, the determination component 1608 may include the above-described combination of... Figure 2 The described base station and / or UE includes one or more antennas, demodulators, MIMO detectors, receive processors, modulators, transmit MIMO processors, transmit processors, controllers / processors, memories, or combinations thereof. Transmit component 1604 can transmit timing adjustment commands to the radio forwarding node, the timing adjustment commands indicating an estimated timing offset to be applied to the receive timing.

[0214] The transmitting component 1604 can transmit an instruction to the wireless relay node to forward a signal back to the wireless transmitter node. The receiving component 1602 can receive the forwarded signal from the wireless relay node based at least in part on the instruction.

[0215] Figure 16 The number and arrangement of components shown are provided as an example. In reality, with... Figure 16 Compared to the components shown, there may be additional components, fewer components, different components, or components arranged in a different manner. Furthermore, Figure 16 The two or more components shown can be implemented within a single component, or Figure 16 The single component shown can be implemented as multiple distributed components. Alternatively, Figure 16 The set (one or more components) shown can perform actions described by Figure 16The other set of components shown performs one or more functions.

[0216] The following provides an overview of some aspects of this disclosure:

[0217] Aspect 1: A wireless communication method performed by a wireless forwarding node, the method comprising: determining a first timing reference configuration for communicating with a first wireless node; determining a second timing reference configuration for communicating with a second wireless node; and forwarding communication between the first wireless node and the second wireless node based at least in part on the first timing reference configuration and the second timing reference configuration.

[0218] Aspect 2: The method of aspect 1, wherein determining the first timing reference configuration includes: determining a reception timing for receiving one or more signals from the first wireless node based at least in part on one or more reference signal transmissions received from the first wireless node; and determining a transmission timing for forwarding one or more signals to the first wireless node based at least in part on one or more timing advance commands received from a control node or the first wireless node.

[0219] Aspect 3: The method of aspect 2, wherein determining the reception timing includes: receiving a signal from the first wireless node; forwarding the signal back to the first wireless node; and receiving a timing adjustment command for the reception timing from the first wireless node or a control node, the timing adjustment command indicating at least in part based on an estimated timing offset of the signal forwarded back to the first wireless node.

[0220] Aspect 4: The method of any one of Aspects 1 to 3, wherein the second timing reference configuration includes one or more of the following: a transmission timing for forwarding one or more signals from the first wireless node to the second wireless node, or a reception timing for receiving one or more signals to be forwarded to the first wireless node from the second wireless node.

[0221] Aspect 5: The method of aspect 4, wherein the transmission timing is based at least in part on one or more of the following: a timing adjustment command received from the control node or the first wireless node, or the round-trip time between the wireless forwarding node and the first wireless node.

[0222] Aspect 6: The method of any one of Aspects 4 to 5, wherein the receiving timing has a fixed value or a value at least in part based on a timing adjustment command received from the first wireless node.

[0223] Aspect 7: The method of any one of Aspects 4 to 5, wherein the receiving timing is autonomously determined within a window relative to another timing reference.

[0224] Aspect 8: The method as described in aspect 7, wherein the size of the window is fixed; pre-configured by an operation, management and maintenance entity; or dynamically indicated by a control node or the first wireless node.

[0225] Aspect 9: The method of any one of Aspects 4 to 5, wherein the reception timing is determined at least in part based on one or more reference signal transmissions received from the second wireless node.

[0226] Aspect 10: The method of any one of Aspects 4 to 9 further includes: transmitting to the control node or the first wireless node information indicating an estimated timing offset associated with the reception timing.

[0227] Aspect 11: The method of any one of Aspects 4 to 10 further includes: receiving from a control node or the first wireless node information indicating an adjustment to the reception timing associated with the wireless forwarding node.

[0228] Aspect 12: The method of any one of Aspects 1 to 11, wherein forwarding the communication between the first wireless node and the second wireless node comprises: receiving from the first wireless node a signal to be forwarded to the second wireless node, wherein the signal is associated with a power delay distribution comprising a plurality of channel taps received at different times; and forwarding the signal to the second wireless node using a cyclic prefix aligned with the earliest channel tap among the plurality of channel taps that satisfies a threshold.

[0229] Aspect 13: The method of any one of Aspects 1 to 12, wherein forwarding the communication between the first wireless node and the second wireless node comprises: receiving from the second wireless node a signal to be forwarded to the first wireless node, wherein the signal is associated with a power delay distribution comprising a plurality of channel taps received at different times; and forwarding the signal to the first wireless node using a cyclic prefix aligned with the earliest channel tap among the plurality of channel taps that satisfies a threshold.

[0230] Aspect 14: A wireless communication method performed by a control node, the method comprising: determining an adjustment to one or more timing reference configurations associated with a wireless forwarding node, the wireless forwarding node being configured to forward communication between a first wireless node and a second wireless node; and transmitting to the wireless forwarding node one or more timing adjustment commands indicating the adjustment to the one or more timing reference configurations.

[0231] Aspect 15: The method of aspect 14, wherein the one or more timing adjustment commands instruct the adjustment to be applied to one or more of the following: a first receive timing associated with the wireless forwarding node receiving one or more signals to be forwarded to the second wireless node from the first wireless node, a first transmission timing associated with the wireless forwarding node forwarding the one or more signals received from the first wireless node to the second wireless node, a second receive timing associated with the wireless forwarding node receiving the one or more signals to be forwarded to the first wireless node from the second wireless node, or a second transmission timing associated with the wireless forwarding node forwarding the one or more signals received from the second wireless node to the first wireless node.

[0232] Aspect 16: The method of any one of Aspects 14 to 15, wherein the adjustment of the one or more timing reference configurations is based at least in part on timing estimation feedback received from one or more of the radio forwarding node, the first radio node, or the second radio node.

[0233] Aspect 17: The method of any one of Aspects 14 to 16 further comprises: transmitting one or more timing adjustment commands to one or more of the first wireless node or the second wireless node, the one or more timing adjustment commands indicating an adjustment to one or more timing reference configurations associated with communication with the wireless forwarding node.

[0234] Aspect 18: A wireless communication method performed by a transmitter node, the method comprising: transmitting to a wireless forwarding node a signal to be forwarded to a wireless receiver node, wherein the wireless forwarding node is associated with a reception timing for receiving the signal from the transmitter node; determining, at least in part, an estimated timing offset to be applied to the reception timing associated with the wireless forwarding node based on the wireless forwarding node forwarding the signal back to the transmitter node; and transmitting to the wireless forwarding node a timing adjustment command, the timing adjustment command indicating the estimated timing offset to be applied to the reception timing.

[0235] Aspect 19: The method of aspect 18 further includes: transmitting to the wireless forwarding node an instruction to forward the signal back to the transmitter node; and receiving the forwarded signal from the wireless forwarding node at least in part based on the instruction.

[0236] Aspect 20: The method of any one of aspects 18 to 19, wherein the signal is a broadband signal.

[0237] Aspect 21: An apparatus for wireless communication at a device, the apparatus comprising a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the device to perform one or more of the methods of aspects 1 to 13.

[0238] Aspect 22: An apparatus for wireless communication, the apparatus comprising a memory and one or more processors coupled to the memory, the one or more processors being configured to perform the methods of one or more aspects of aspects 1 to 13.

[0239] Aspect 23: An apparatus for wireless communication, the apparatus comprising at least one means for performing the methods of one or more aspects of aspects 1 to 13.

[0240] Aspect 24: A non-transitory computer-readable medium storing code for wireless communication, said code including instructions executable by a processor to perform methods of one or more of aspects 1 to 13.

[0241] Aspect 25: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions including one or more instructions which, when executed by one or more processors of the device, cause the device to perform one or more of the methods of aspects 1 to 13.

[0242] Aspect 26: An apparatus for wireless communication at a device, the apparatus comprising a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the device to perform one or more of the methods of aspects 14 to 17.

[0243] Aspect 27: An apparatus for wireless communication, the apparatus comprising a memory and one or more processors coupled to the memory, the one or more processors being configured to perform the methods of one or more aspects of aspects 14 to 17.

[0244] Aspect 28: An apparatus for wireless communication, the apparatus comprising at least one means for performing the methods of one or more aspects of aspects 14 to 17.

[0245] Aspect 29: A non-transitory computer-readable medium storing code for wireless communication, said code including instructions executable by a processor to perform methods of one or more aspects of aspects 14 to 17.

[0246] Aspect 30: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions including one or more instructions which, when executed by one or more processors of the device, cause the device to perform one or more of the methods of aspects 14 to 17.

[0247] Aspect 31: An apparatus for wireless communication at a device, the apparatus comprising a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the device to perform one or more of the methods of aspects 18 to 20.

[0248] Aspect 32: An apparatus for wireless communication, the apparatus comprising a memory and one or more processors coupled to the memory, the one or more processors being configured to perform the methods of one or more aspects of aspects 18 to 20.

[0249] Aspect 33: An apparatus for wireless communication, the apparatus comprising at least one means for performing the methods of one or more aspects of aspects 18 to 20.

[0250] Aspect 34: A non-transitory computer-readable medium storing code for wireless communication, said code including instructions executable by a processor to perform methods of one or more aspects of aspects 18 to 20.

[0251] Aspect 35: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions including one or more instructions which, when executed by one or more processors of the device, cause the device to perform one or more of the methods of aspects 18 to 20.

[0252] The foregoing disclosure provides explanations and descriptions, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the foregoing disclosure or may be obtained through practice.

[0253] As used herein, the term "component" is intended to be broadly interpreted as hardware and / or a combination of hardware and software. "Software" should be broadly interpreted as instructions, instruction sets, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, and / or functions, whether referred to as software, firmware, middleware, microcode, hardware description languages, or other terms. As used herein, processors are implemented using hardware and / or a combination of hardware and software. It will be apparent that the systems and / or methods described herein can be implemented in various forms of hardware and / or combinations of hardware and software. The actual dedicated control hardware or software code used to implement these systems and / or methods is not limited in any way. Thus, the operation and behavior of these systems and / or methods are described herein without reference to any specific software code—it is understood that software and hardware can be designed to implement these systems and / or methods, at least in part, based on the descriptions herein.

[0254] As used in this article, depending on the context, a threshold can refer to a value greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, etc.

[0255] Although specific combinations of features are described in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of aspects. In fact, many of these features can be combined in ways not specifically described in the claims and / or not disclosed in the specification. Although each dependent claim listed below may be directly subordinated to only one claim, the disclosure of aspects includes each dependent claim being combined with each other claim in this set of claims. As used herein, the phrase “at least one of” refers to any combination of these items, including single members. By way of example, “at least one of a, b, or c” is intended to cover: a, b, c, ab, ac, bc, and abc, as well as any combination having multiple identical elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other ordering of a, b, and c).

[0256] The elements, actions, or instructions used herein should not be construed as critical or necessary unless explicitly stated otherwise. Furthermore, as used herein, the articles “a” and “a certain” are intended to include one or more items and may be used interchangeably with “one or more.” Additionally, as used herein, the article “the” is intended to include one or more items referenced in conjunction with the article “the” and may be used interchangeably with “one or more.” Furthermore, as used herein, the terms “set” and “group” are intended to include one or more items (e.g., related items, unrelated items, or a combination of related and unrelated items) and may be used interchangeably with “one or more.” Where only one item is intended, the phrase “only one” or similar language is used. Moreover, as used herein, the terms “have,” “contain,” “include,” etc., are intended to be open-ended terms. Furthermore, the phrase “based on” is intended to mean “at least partially based on” unless otherwise explicitly stated. Moreover, as used herein, the term “or” is intended to be inclusive when used in a sequence and may be used interchangeably with “and / or” unless otherwise explicitly stated (e.g., in combination with “either of” or “only one of”).

Claims

1. A wireless relay node, comprising: Memory; as well as One or more processors, said one or more processors being coupled to the memory and configured to: Determine a first timing reference configuration for communicating with the first wireless node; Determine a second timing reference configuration for communicating with the second wireless node; and Forwarding communication between the first wireless node and the second wireless node is based at least in part on the first timing reference configuration and the second timing reference configuration, wherein forwarding the communication between the first wireless node and the second wireless node includes: Receive a signal from the first wireless node or the second wireless node to be forwarded to the other of the first wireless node or the second wireless node, wherein the signal is associated with a power delay distribution comprising multiple channel taps received at different times; and The signal is forwarded to the first wireless node or the second wireless node using a cyclic prefix aligned with the earliest channel tap among the plurality of channel taps that meets the threshold.

2. The wireless forwarding node as described in claim 1, wherein, To determine the first timing reference configuration, the one or more processors are further configured to: The reception timing for receiving one or more signals from the first wireless node is determined at least in part based on one or more reference signal transmissions received from the first wireless node; and The transmission timing for forwarding one or more signals to the first wireless node is determined at least in part based on one or more timing advance commands received from the control node or the first wireless node.

3. The wireless forwarding node as described in claim 2, wherein, To determine the receiving timing, the one or more processors are further configured to: Receive signals from the first wireless node; The signal is forwarded back to the first wireless node; as well as A timing adjustment command is received from the first wireless node or control node for the received timing, the timing adjustment command indicating at least in part based on an estimated timing offset of the signal forwarded back to the first wireless node.

4. The wireless forwarding node as described in claim 1, wherein, The second timing reference configuration includes one or more of the following: a transmission timing for forwarding one or more signals from the first wireless node to the second wireless node, or a reception timing for receiving one or more signals to be forwarded from the second wireless node to the first wireless node.

5. The wireless forwarding node as described in claim 4, wherein, The transmission timing is based, in part, on one or more of the following: a timing adjustment command received from the control node or the first wireless node, or the round-trip time between the wireless forwarding node and the first wireless node.

6. The wireless forwarding node as described in claim 4, wherein, The receiving timing has a fixed value or a value that is at least partially based on a timing adjustment command received from the first wireless node.

7. The wireless forwarding node as described in claim 4, wherein, The receiving timing is determined autonomously within a window relative to another timing reference.

8. The wireless forwarding node as described in claim 7, wherein, The size of the window is fixed; it is pre-configured by the operation, management and maintenance entity; or it is dynamically indicated by the control node or the first wireless node.

9. The wireless forwarding node as described in claim 4, wherein, The reception timing is determined at least in part based on one or more reference signal transmissions received from the second wireless node.

10. The wireless forwarding node as described in claim 4, wherein, The one or more processors are further configured to: Transmit information indicating an estimated timing offset associated with the reception timing to the control node or the first wireless node.

11. The wireless forwarding node as described in claim 4, wherein, The one or more processors are further configured to: Receive information from the control node or the first wireless node indicating an adjustment to the reception timing associated with the wireless forwarding node.

12. A control node, comprising: Memory; as well as One or more processors, said one or more processors being coupled to the memory and configured to: Adjustments are determined to one or more timing reference configurations associated with a wireless forwarding node, which is configured to forward communication between a first wireless node and a second wireless node. as well as One or more timing adjustment commands are transmitted to the wireless forwarding node to indicate the adjustment of the one or more timing reference configurations to adjust the downlink or uplink receive timing of the wireless forwarding node to align the cyclic prefix of the forwarded signal with the earliest channel tap that meets a threshold among a plurality of channel taps received by the wireless forwarding node at different times, wherein the forwarded signal is associated with a power delay distribution including the plurality of channel taps.

13. The control node as claimed in claim 12, wherein, The one or more timed adjustment commands indicate that the adjustment will be applied to one or more of the following: A first reception timing associated with the wireless forwarding node receiving one or more signals from the first wireless node to be forwarded to the second wireless node. A first transmission timing associated with the wireless forwarding node forwarding the one or more signals received from the first wireless node to the second wireless node. A second reception timing associated with the wireless forwarding node receiving one or more signals to be forwarded to the first wireless node from the second wireless node, or A second transmission timing associated with the wireless forwarding node forwarding the one or more signals received from the second wireless node to the first wireless node.

14. The control node as claimed in claim 12, wherein, The adjustments to the one or more timing reference configurations are based at least in part on timing estimation feedback received from one or more of the wireless forwarding node, the first wireless node, or the second wireless node.

15. The control node as claimed in claim 12, wherein, The one or more processors are further configured to: One or more timing adjustment commands are transmitted to one or more of the first wireless node or the second wireless node, the one or more timing adjustment commands indicating adjustments to one or more timing reference configurations associated with communication with the wireless forwarding node.

16. A transmitter node, comprising: Memory; as well as One or more processors, said one or more processors being coupled to the memory and configured to: A signal to be forwarded to a wireless receiver node is transmitted to a wireless forwarding node, wherein the wireless forwarding node is associated with a reception timing for receiving the signal from the transmitter node; The estimated timing offset to be applied to the receive timing associated with the wireless forwarding node is determined at least in part based on the wireless forwarding node forwarding the signal back to the transmitter node; and A timing adjustment command is transmitted to the wireless forwarding node, the timing adjustment command indicating the estimated timing offset to be applied to the receive timing of the wireless forwarding node to adjust the receive timing to align the cyclic prefix of the signal with the earliest channel tap that meets a threshold among a plurality of channel taps received by the wireless forwarding node at different times, wherein the forwarded signal is associated with a power delay distribution including the plurality of channel taps.

17. The transmitter node as claimed in claim 16, wherein, The one or more processors are further configured to: Transmitting a command to the wireless relay node to forward the signal back to the transmitter node; and The forwarded signal is received from the wireless forwarding node at least in part based on the instructions.

18. The transmitter node as claimed in claim 16, wherein, The signal is a broadband signal.

19. A wireless communication method performed by a wireless relay node, the method comprising: Determine a first timing reference configuration for communicating with the first wireless node; Determine a second timing reference configuration for communicating with the second wireless node; as well as Forwarding communication between the first wireless node and the second wireless node is based at least in part on the first timing reference configuration and the second timing reference configuration, wherein forwarding the communication between the first wireless node and the second wireless node includes: Receive a signal from the first wireless node or the second wireless node to be forwarded to the other of the first wireless node or the second wireless node, wherein the signal is associated with a power delay distribution comprising multiple channel taps received at different times; and The signal is forwarded to the first wireless node or the second wireless node using a cyclic prefix aligned with the earliest channel tap among the plurality of channel taps that meets the threshold.

20. The method of claim 19, wherein, Determining the first timing reference configuration includes: The reception timing for receiving one or more signals from the first wireless node is determined at least in part based on one or more reference signal transmissions received from the first wireless node; and The transmission timing for forwarding one or more signals to the first wireless node is determined at least in part based on one or more timing advance commands received from the control node or the first wireless node.

21. The method of claim 20, wherein, Determining the receiving timing includes: Receive signals from the first wireless node; Forward the signal back to the first wireless node; and A timing adjustment command is received from the first wireless node or control node for the received timing, the timing adjustment command indicating at least in part based on an estimated timing offset of the signal forwarded back to the first wireless node.

22. The method of claim 19, wherein, The second timing reference configuration includes one or more of the following: a transmission timing for forwarding one or more signals from the first wireless node to the second wireless node, or a reception timing for receiving one or more signals to be forwarded from the second wireless node to the first wireless node.

23. The method of claim 22, wherein, The transmission timing is based, in part, on one or more of the following: a timing adjustment command received from the control node or the first wireless node, or the round-trip time between the wireless forwarding node and the first wireless node.

24. The method of claim 22, wherein, The receiving timing has a fixed value or a value that is at least partially based on a timing adjustment command received from the first wireless node.

25. The method of claim 22, wherein, The receiving timing is determined autonomously within a window relative to another timing reference.

26. The method of claim 22, wherein, The reception timing is determined at least in part based on one or more reference signal transmissions received from the second wireless node.

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