System and method for device-to-device communication

Abstract

The disclosure relates to communicating, by a first wireless communication device, with a second wireless communication device via a sidelink interface. The first wireless communication device may transmit at least one of a beam measurement configuration or a beam reference signal, RS, to the second wireless communication device via a sidelink interface. A first wireless communication device may receive beam measurements from a second wireless communication device via a sidelink interface.

Description

Technical Field

[0001] The present disclosure relates generally to wireless communications, and more particularly to device-to-device communications on Frequency Range 2 (FR2). Background Art

[0002] Side Link (SL) communication refers to wireless radio communication between two or more User Equipments (UEs). In this type of communication, two or more UEs that are geographically close to each other can communicate without being routed to a network (e.g., a base station (BS)) or a core network. Therefore, data transmission in SL communication is different from typical cellular network communications that include transmitting data to and receiving data from the network. In SL communication, data is transmitted directly from a source UE to a target UE through, for example, a unified air interface (e.g., a PC5 interface) without passing through the network. Summary of the invention

[0003] The exemplary arrangements disclosed herein are intended to solve problems related to one or more problems raised in the prior art, and when combined with the accompanying drawings, by reference to the following detailed description, additional features will be readily understood. According to various arrangements, example systems, methods, devices, and computer program products are disclosed herein. However, it should be understood that these arrangements are given as examples rather than limitations, and it will be apparent to a person of ordinary skill in the art who has read this disclosure that various modifications may be made to the disclosed arrangements (e.g., including combining features from various disclosed examples, embodiments, and / or implementations) while still within the scope of this disclosure.

[0004] Some arrangements of the present disclosure relate to systems, methods, apparatuses, and non-volatile computer-readable media, including: a first wireless communication device communicates with a second wireless communication device via a sidelink interface. The first wireless communication device may send at least one of a beam measurement configuration or a beam reference signal (RS) to the second wireless communication device via the sidelink interface. The first wireless communication device may receive a beam measurement result from the second wireless communication device via the sidelink interface.

[0005] In some arrangements, sending the beam measurement configuration may include initiating a beam measurement procedure. The beam measurement procedure may be initiated in response to at least one of the following: expiration of a beam measurement timer; determination that the first wireless communication device is to establish a unicast link; generation of a Direct Communication Request (DCR) message; generation of a sidelink signaling radio bearer (SRB) message; or failure to detect a beam. The first wireless communication device may, in response to initiating the beam measurement procedure, perform at least one of the following: start a beam measurement timer; start a beam configuration transmission timer; transmit a beam measurement configuration. In response to determining that the beam configuration transmission timer has expired, the first wireless communication device may transmit the beam measurement configuration.

[0006] In some arrangements, the first wireless communication device may restart the beam configuration transmission timer. In response to transmitting the first beam measurement configuration, the first wireless communication device may transmit the second beam measurement configuration. In response to determining that the number of beam measurement configuration transmissions reaches a maximum number of beam measurement configuration transmissions, at least one of the following is performed: the first wireless communication device may stop the beam measurement process, and the first wireless communication device may stop the beam measurement transmission timer.

[0007] In some arrangements, the beam measurement configuration may include at least one of the following: a beam configuration transmission timer; a beam measurement timer; a maximum number of beam measurement configuration transmissions; an indication indicating whether a beam RS exists; an indication indicating whether a second wireless communication device receiving the beam measurement configuration is to measure the beam RS; an indication indicating whether the second wireless communication device receiving the beam measurement configuration is to report the beam measurement result to the first wireless communication device; resource configuration of the beam RS; an identifier (ID) of the beam measurement configuration; the ID of the beam RS; a measurement request indicating whether the second wireless communication device reports the beam measurement result; a beam measurement report configuration of the beam measurement result; a beam index. The beam measurement configuration may include a beam measurement report configuration. The beam measurement report configuration may include at least one of the following: a beam RS measurement threshold; a period for reporting measurement results.

[0008] In some arrangements, the beam measurement configuration may include a beam RS resource configuration for the beam RS. The beam RS resource configuration for the beam RS may include at least one of the following: a beam index, a frequency resource position of the beam RS; a time resource position of the beam RS; a period of the resources of the beam RS; a resource type of the resources of the beam RS (e.g., an RSRP reference signal, a CSI reference signal, a SL-MIB, or an SSB); a time slot index of a time slot of the beam RS; a resource pool identifier (ID) of the beam RS; or an ID of the beam RS. The beam measurement configuration may be included in at least one of a system information block (SIB), a radio resource control (RRC) signaling, a media access control (MAC) control element (CE), a sidelink control signaling (SCI), or a resource pool configuration. The beam measurement configuration may be received from the network.

[0009] Some arrangements of the present disclosure relate to systems, methods, apparatuses, and non-volatile computer-readable media, including: a second wireless communication device communicates with a first wireless communication device via a sidelink interface. The second wireless communication device can receive at least one of a beam measurement configuration or a beam reference signal (RS) from the first wireless communication device through the sidelink interface. The second wireless communication device can use the beam measurement configuration to measure the beam RS. The second wireless communication device can send beam measurement results to the first wireless communication device through the sidelink interface. The beam measurement configuration may include at least one of the following: a beam RS measurement threshold; an indication indicating the presence of a beam RS; an indication indicating that the second wireless communication device receiving the beam measurement configuration is to measure the beam RS; an indication indicating that the second wireless communication device receiving the beam measurement configuration is to report the beam measurement results to the first wireless communication device.

[0010] In some arrangements, the second wireless communication device may send a beam measurement result in response to at least one of the following: determining that the beam measurement result is lower than a beam RS measurement threshold; determining that a beam in a sidelink interface fails; determining to send the beam measurement result based on periodicity; receiving a first message from the first wireless communication device, the first message including at least one of a Sidelink Signaling Radio Bearer (SL-SRB) message, a Direct Communication Request (DCR) message, and a DCR response message. The beam measurement result may include at least one of the following: a measurement value of the beam RS; a recommended beam for communication; a preferred beam for communication; a non-preferred beam for communication; a candidate beam for communication; an identifier (ID) of the beam measurement configuration; a time slot index of the time slot of the beam RS; a time slot number of the time slot of the beam RS; the ID of the beam RS; the beam index; the ID of the candidate beam RS, which is recommended by the second wireless communication; the ID of the beam RS with the best measurement value among multiple beam RSs; or the time slot index of the time slot of the beam RS.

[0011] In some arrangements, the measurement value may include at least one of an RSRP value and a CSI value. A recommended beam, a preferred beam, a non-preferred beam, or a candidate beam may be identified by at least one of: an ID of a beam measurement configuration; an ID of a beam RS; a beam index.

[0012] Some arrangements of the present disclosure relate to systems, methods, apparatus, and non-volatile computer-readable media, including: a first wireless communication device communicates with a second wireless communication device via a sidelink interface. The first wireless communication device may determine a beam failure on the sidelink interface. In response to determining the beam failure, the first wireless communication device may perform at least one of the following: initiating a beam recovery process; sending a beam indication signal indicating that a beam failure has been detected; sending a beam measurement configuration; initiating a beam measurement scanning process; triggering resource reselection; or triggering resource pool reselection. The beam recovery process may include at least one of the following: the first wireless communication device sends a beam recovery signal to the second communication device via the sidelink interface; starts a beam recovery timer; and receives a beam recovery response signal received from the second wireless communication device. The first wireless communication device can determine beam failure in response to at least one of the following: determining that the number of consecutive missing physical sidelink feedback channels (PSFCH) reaches a threshold; in response to receiving an indication from a sidelink RLC entity indicating that the maximum number of retransmissions for a specific destination has been reached; in response to determining that T400 for a specific destination has expired; in response to receiving an indication from a MAC entity indicating that the maximum number of consecutive HARQ DTX times for a specific destination has been reached; in response to receiving an integrity check failure indication regarding S1-SRB2 or S1-SRB3 for a specific destination from a sidelink PDCP entity; receiving a beam indication signal indicating that a beam failure has been detected.

[0013] In some arrangements, in response to detecting a beam failure, the first wireless communication device sends at least one of the following to the network: an indication that a beam failure has been detected; a destination layer 2 identifier (ID) of the beam on which the beam failure is detected. The first wireless communication device may determine that the beam recovery process has failed in response to at least one of the following: the first wireless communication device does not receive a beam recovery response signal from the second wireless communication device; the beam recovery timer expires. The first wireless communication device may determine that the beam recovery process is successful in response to at least one of the following: receiving a beam recovery response signal from the second wireless communication device; receiving a beam recovery response signal from the second wireless communication device and the beam recovery timer is running; the sidelink BWP has been reconfigured; the sidelink resource pool has been reconfigured; the beam RS has been reconfigured. The beam recovery signal may include at least one of a beam measurement configuration and a beam measurement result. The beam recovery response signal may include at least one of a beam measurement result, a hybrid automatic repeat reQuest (HARQ) feedback, and a new sidelink transmission identified by sidelink control information (SCI). In response to determining that the beam recovery process has failed, the first wireless communication device may determine that a radio link failure (RLF) has been detected. The HARQ feedback may be at least one of a positive acknowledgement and a negative acknowledgement.

[0014] Some arrangements of the present disclosure relate to systems, methods, apparatus, and non-volatile computer-readable media, including: a second wireless communication device communicates with a first wireless communication device via a sidelink interface. The second wireless communication device may receive a beam recovery signal from the first wireless communication device via the sidelink interface. The second wireless communication device may send a beam recovery response signal to the first wireless communication device via the sidelink interface. The second wireless communication device may determine a beam failure on the sidelink interface. The second wireless communication device may send a beam failure indication signal to the first wireless communication device. The first wireless communication device may perform a beam recovery process in response to receiving the beam failure indication signal. The beam failure indication signal may include at least one of the following: a beam measurement result; an indication of a detected beam failure.

[0015] The above and other aspects and implementations thereof are described in more detail in the drawings, the description and the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Various example arrangements of the present solution are described in detail below with reference to the following drawings. The drawings or diagrams are provided for illustrative purposes only and depict only example arrangements of the present solution to facilitate the reader's understanding of the present solution. Therefore, the drawings should not be considered as limiting the breadth, scope or applicability of the present solution. It should be noted that for clarity and ease of illustration, these drawings are not necessarily drawn to scale.

[0017] Figure 1A are schematic diagrams of wireless communication networks according to various arrangements.

[0018] Figure 1B is a block diagram of a wireless communication system for transmitting and receiving downlink, uplink and / or SL communication signals according to various arrangements.

[0019] Figure 2 Example scenarios of SL communications according to various arrangements are shown.

[0020] Figure 3 is a flow chart of a method for device-to-device communication on frequency range 2 (FR2) according to various arrangements.

[0021] Figure 4 is a flow chart of a method for device-to-device communication on frequency range 2 (FR2) according to various arrangements.

[0022] Figure 5 is a flow chart of a method for device-to-device communication on frequency range 2 (FR2) according to various arrangements.

[0023] Figure 6 is a schematic diagram of transmission according to various arranged beam measurement configurations.

[0024] Figure 7 is a schematic diagram of transmission according to various arranged beam measurement configurations. DETAILED DESCRIPTION

[0025] Various example arrangements of the present solution are described below with reference to the accompanying drawings to enable those of ordinary skill in the art to make and use the present solution. It is apparent to those of ordinary skill in the art that, after reading this disclosure, various changes or modifications may be made to the examples described herein without departing from the scope of the present solution. Therefore, the present solution is not limited to the example arrangements and applications described and illustrated herein. In addition, the specific order or hierarchy of steps in the methods disclosed herein are merely example methods. Based on design preferences, the specific order or hierarchy of steps of the disclosed methods or processes may be rearranged while remaining within the scope of the present solution. Therefore, those of ordinary skill in the art will understand that the methods and techniques disclosed herein present various steps or actions in a sample order, and unless otherwise expressly stated, the present solution is not limited to the specific order or hierarchy presented.

[0026] With the emergence of wireless multimedia services, users' demands for high data rates and user experience are increasing, which puts higher requirements on the system capacity and coverage of traditional cellular networks. In addition, public safety, social networks, close-range data sharing, and local advertising have gradually expanded the demand for proximity services, which allow users to understand and communicate with nearby users or objects. Traditional network-centric cellular networks have limitations in high data rates and supporting proximity services. In this context, device-to-device (D2D) communication has emerged to address the shortcomings of the network-centric model. The application of D2D technology can reduce the burden on cellular networks, reduce UE battery power consumption, increase data rates, and improve the robustness of network infrastructure, thereby meeting the above-mentioned high data rate services and proximity services. D2D technology is also known as Proximity Services (ProSe), one-way / sidelink / SL communication, etc.

[0027] In order to improve the reliability, data rate, and latency of SL communication, carrier aggregation (CA) can be implemented for SL communication. In CA, two or more component carriers (CC) are aggregated to support a wider transmission bandwidth in the frequency domain. In some examples, the vehicle UE can perform SL reception and transmission on one or more CCs simultaneously. The arrangement disclosed in this article involves data segmentation and data replication based on CA.

[0028] refer to Figure 1A, an example wireless communication network 100 is shown. The wireless communication network 100 generates group communications within a cellular network. In a wireless communication system, the network-side communication nodes or networks may include a next-generation node B (GenerationNode B, referred to as gNB), an E-UTRAN node B (also known as an evolved node B, eNodeB or eNB), a micro-micro station, a femto-micro station, a transmission / reception point (Transmission / Reception Point, referred to as TRP), an access point (Access Point, referred to as AP), etc. The terminal-side nodes or UEs may include devices such as mobile devices, smart phones, cellular phones, personal digital assistants (Personal Digital Assistant, referred to as PDA), tablet computers, laptop computers, wearable devices, vehicles with vehicle-mounted communication systems, and the like. In Figure 1A In the embodiment, the network side and terminal side communication nodes are represented by network 102, UE 104a and 104b respectively. In some arrangements, network 102 and UE 104a / 104b are sometimes referred to as "wireless communication nodes" and "wireless communication devices", respectively. Such communication nodes / devices can perform wireless communications.

[0029] exist Figure 1AIn the arrangement shown, the network 102 may define a cell 101 in which UEs 104a and 104b are located. The UEs 104a and / or 104b may move or remain stationary within the coverage area of ​​the cell 101. The UE 104a may communicate with the network 102 via a communication channel 103a. Similarly, the UE 104b may communicate with the network 102 via a communication channel 103b. In addition, the UEs 104a and 104b may communicate with each other via a communication channel 105. The communication channels 103a and 104b between the respective UEs and the network may be implemented using an interface such as a Uu interface, which is also referred to as a Universal Mobile Telecommunication System (UMTS) air interface. The communication channel 105 between UEs is an SL communication channel and can be implemented using a PC5 interface, which is introduced to address high-mobility and high-density applications, such as D2D communication, vehicle-to-vehicle (V2V) communication, vehicle-to-pedestrian (V2P) communication, vehicle-to-infrastructure (V2I) communication, vehicle-to-network (V2N) communication, etc. In some cases, the vehicle network communication mode can be collectively referred to as vehicle-to-everything (V2X) communication. The network 102 is connected to the core network (CN) 108 via an external interface 107 (e.g., Iu interface).

[0030] In some examples, a remote UE (e.g., UE 104b) that does not communicate directly with network 102 or CN 108 (e.g., communication channel link 103b is not established) communicates indirectly with network 102 and CN 108 using SL communication channel 105 through a relay UE (e.g., UE 104a), which can communicate directly with network 102 and CN 108, or indirectly with network 102 and CN 108 through another relay UE that can communicate directly with network 102 and CN 108.

[0031] Figure 1B A block diagram of an example wireless communication system for transmitting and receiving downlink, uplink, and SL communication signals according to some arrangements of the present disclosure is shown. In some arrangements, as described above, the system can be in a wireless communication environment (e.g., Figure 1A The present invention relates to a wireless communication network 100 for transmitting and receiving data.

[0032] like Figure 1A As described, the system generally includes a network 102, UE 104a and 104b. The network 102 includes a network transceiver module 110, a network antenna 112, a network memory module 116, a network processor module 114 and a network communication module 118, each of which is coupled and interconnected to each other via a data communication bus 120 when necessary. The UE 104a includes a UE transceiver module 130a, a UE antenna 132a, a UE memory module 134a and a UE processor module 136a, each of which is coupled and interconnected to each other via a data communication bus 140a when necessary. Similarly, the UE 104b includes a UE transceiver module 130b, a UE antenna 132b, a UE memory module 134b and a UE processor module 136b, each of which is coupled and interconnected to each other via a data communication bus 140b when necessary. The network 102 communicates through one or more communication channels 150, UE 104a and 104b, and the communication channel can be any wireless channel or other medium known in the art suitable for data transmission as described herein.

[0033] Apart from Figure 1B In addition to the modules shown, the system may also include any number of modules. It will be appreciated by those skilled in the art that the various illustrative blocks, modules, circuits, and processing logic described in conjunction with the arrangements disclosed herein may be implemented in hardware, computer-readable software, firmware, or any actual combination thereof. In order to clearly illustrate this interchangeability and compatibility of hardware, firmware, and software, various illustrative components, blocks, modules, circuits, and steps are generally described in terms of their functions. Whether such functions are implemented as hardware, firmware, or software depends on specific applications and design constraints on the entire system. A technician familiar with the concepts described herein may implement such functions in a suitable manner for each specific application, but such implementation decisions should not be interpreted as limiting the scope of the present disclosure.

[0034] The wireless transmission from the antenna of one of UE 104a and 104b to the antenna of network 102 is referred to as uplink transmission, and the wireless transmission from the antenna of network 102 to the antenna of one of UE 104a and 104b is referred to as downlink transmission. According to some arrangements, each of UE transceiver modules 130a and 130b may be referred to as an uplink transceiver or UE transceiver in this article. The uplink transceiver may include a transmitter and a receiver circuit, and the transmitter and the receiver circuit are coupled to the corresponding antenna 132a and 132b. Alternatively, the duplex switch may couple the uplink transmitter or receiver to the uplink antenna in a time division duplex manner. Similarly, the network transceiver module 110 may be referred to as a downlink transceiver or network transceiver in this article. The downlink transceiver may include an RF transmitter and a receiver circuit, and the RF transmitter and the receiver circuit are coupled to the antenna 112. The downlink duplex switch may couple the downlink transmitter or the receiver to the antenna 112 in a time division duplex manner. The operation of the transceivers 110 and 130a and 130b is coordinated in time so that the uplink receiver is coupled to the antennas 132a and 132b for receiving transmissions on the wireless communication channel 150 at the same time as the downlink transmitter is coupled to the antenna 112. In some arrangements, the UEs 104a and 104b can communicate with the network 102 via the wireless communication channel 150 using the UE transceivers 130a and 130b via the respective antennas 132a and 132b. The wireless communication channel 150 can be any wireless channel or other medium suitable for downlink and / or uplink data transmission known in the art, as described herein. The UEs 104a and 104b can communicate with each other via the wireless communication channel 170. The wireless communication channel 170 can be any wireless channel or other medium suitable for SL transmission of data, as described herein.

[0035] Each of the UE transceivers 130a and 130b and the network transceiver 110 is configured to communicate via a wireless data communication channel 150 and to cooperate with an appropriately configured antenna device capable of supporting a specific wireless communication protocol and modulation scheme. In some arrangements, the UE transceivers 130a and 130b and the network transceiver 110 are configured to support industry standards, such as Long Term Evolution (LTE) and emerging 5G and 6G standards, etc. However, it should be understood that the present disclosure is not necessarily limited to specific standards and related protocols in application. Instead, the UE transceivers 130a and 130b and the network transceiver 110 can be configured to support alternative or additional wireless data communication protocols, including future standards or variants thereof.

[0036] The processor modules 136a, 136b and 114 can all be implemented or realized with a general purpose processor, a content addressable memory, a digital signal processor, an application specific integrated circuit, a field programmable gate array, any suitable programmable logic device, discrete gate or transistor logic, discrete hardware components or any combination thereof, which are designed to perform the functions described herein. In this manner, the processor can be implemented as a microprocessor, a controller, a microcontroller, a state machine, etc. The processor can also be implemented as a combination of computing devices, for example, a combination of a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors combined with a digital signal processor core, or any other such configuration.

[0037] In addition, the methods and algorithms described in conjunction with the arrangements disclosed herein may be directly embodied in hardware, firmware, software modules executed by processor modules 114, 136a, and 136b, respectively, or any practical combination thereof. Memory modules 116, 134a, and 134b may be implemented as RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disks, removable disks, CD-ROMs, or any other form of storage medium known in the art. In this regard, memory modules 116, 134a, and 134b may be coupled to processor modules 114, 136a, and 136b, respectively, so that processor modules 114, 136a, and 136b may read information from and write information to memory modules 116 and 116. Memory modules 116, 134a, and 134b may also be integrated into their respective processor modules 114, 136a, and 136b. In some arrangements, the memory modules 116, 134a, and 134b may each include a cache memory for storing temporary variables or other intermediate information during the execution of instructions to be executed by the processor modules 116, 134a, and 134b, respectively. The memory modules 116, 134a, and 134b may also each include a non-volatile memory for storing instructions to be executed by the processor modules 114 and 136a, and 136b, respectively.

[0038] The network interface 118 generally represents hardware, software, firmware, processing logic and / or other components of the network 102, and is capable of bidirectional communication between the network transceiver 110 and other network components and communication nodes configured to communicate with the network 102. For example, the network interface 118 can be configured to support Internet or WiMAX traffic. In a non-limiting typical deployment, the network interface 118 provides an 802.3 Ethernet interface so that the network transceiver 110 can communicate with a traditional Ethernet-based computer network. In this way, the network interface 118 may include a physical interface for connecting to a computer network (e.g., a Mobile Switching Center (MSC)). The term "configured for" or "configured to" used herein for a specific operation or function refers to a device, component, circuit, structure, machine, signal, etc. that is physically constructed, programmed, formatted and / or arranged to perform a specified operation or function. The network interface 118 can allow the network 102 to communicate with other networks or core networks via a wired or wireless connection.

[0039] In some arrangements, each of the UEs 104a and 104b may operate in a hybrid communication network in which the UE communicates with the network 102 and with other UEs, e.g., between 104a and 104b. As described in further detail below, the UEs 104a and 104b support SSL communications with other UEs and downlink / uplink communications between the network 102 and the UEs 104a and 104b. Typically, SL communications allow the UEs 104a and 104b to establish direct communication links with each other or with other UEs from different cells without requiring the network 102 to relay data between the UEs.

[0040] Figure 2 is a schematic diagram of a system 200 for SL communication according to various arrangements. Figure 2 As shown, the network 210 (eg, Figure 1A The network 102) broadcasts a signal which is received by the first UE 220, the second UE 230 and the third UE 240. Figure 2 UE 220 and 230 in the figure are shown as vehicles with a vehicle communication network, and UE 240 is shown as a mobile device. As shown in SL, UE 220-240 can communicate with each other (e.g., directly transmit and receive) via an air interface without being forwarded by base station 210 or core network 250. This type of V2X communication is called PC5-based V2X communication or V2X SL communication.

[0041] As used herein, when two UEs 104a or 104b perform SL communication with each other via the communication channel 105 / 170, a UE that transmits data to another UE is referred to as a transmitting (TX) UE, and a UE that receives the data is referred to as a receiving (RX) UE.

[0042] With the emergence of wireless multimedia services, people's demand for high data rates and user experience continues to increase, which puts higher requirements on the system capacity and coverage of traditional cellular networks. On the other hand, application scenarios such as public safety, social networks, close-range data sharing, and local advertising have gradually expanded people's demand for understanding and communicating with people or things nearby (e.g., proximity services). Traditional base station-centric cellular networks may have limitations in high data rates and supporting proximity services. Device-to-device (D2D) communication technology has emerged. The application of D2D communication technology can reduce the burden on cellular networks, reduce the battery power consumption of user devices, increase data rates, and / or improve the robustness of network infrastructure, which can well meet the above-mentioned high data rate services and proximity services. The requirements. D2D technology can also be referred to as proximity service (ProSe), unidirectional / sidelink (SL) communication. The interface between devices can be a PC5 interface.

[0043] Devices that use / utilize / apply sidelink communication may support two resource modes (e.g., Mode 1 and Mode 2). For Mode 1, the UE may use resources scheduled by the network to transmit sidelink data. For Mode 2, the UE may select transmission resources by itself to transmit sidelink data.

[0044] Wireless communication can be carried out on carriers or frequency bands. Two different frequency ranges (e.g., Frequency Range 1 (FR1) and Frequency Range 2 (FR2)) can be used for 5G technology including sidelinks. The two different frequency ranges are designated as FR1 and FR2. It can be envisioned / assumed that the frequency bands within the FR1 range carry most of the traditional cellular mobile communication services. The higher frequency bands within the FR2 range may be intended / designed to provide short-range ultra-high data rate capabilities for 5G radios. As 5G wireless technology is expected to carry higher speed data, additional bandwidth in these higher frequency bands may be needed / required.

[0045] Initially, the FR1 band was intended to be limited to the frequency band below 6 GHz, but with the expected allocation of additional spectrum, the FR1 range is extended to 7.125 GHz. Currently, user terminal devices can communicate directly with each other on carriers within FR1 (e.g., without using base stations). To increase data rates, the present disclosure describes how to apply sidelink communications on carriers within FR2.

[0046] When using low and medium frequency ranges, signals can be transmitted in all directions or at relatively wide angles. However, when using very high frequencies (for example, carriers in FR2), there may not be much choice except using huge antenna arrays. Due to the use of huge antenna arrays, the radiation generated may be beams. The corresponding technology can be called beamforming. For wireless communication devices, each beam can occupy a specific direction. By adopting different transmission parameters, the wireless communication device can control the direction of the beam. However, when communicating with other devices, the beam may be used, and it may be necessary to process / investigate whether the beam used is still working well.

[0047] In order to select the best beam for communication, the first UE may transmit beam reference signaling (RS), and the second UE may measure the beam RS. The second UE may send the beam measurement result to the first UE. Based on the received beam measurement result, the first UE may know / realize which beam may be adopted.

[0048] Figure 3 is a flow chart of a method for device-to-device communication using beamforming according to various arrangements. In some arrangements, a first wireless communication device (eg, a first UE) may communicate with a second wireless communication device (eg, a second UE) via a sidelink interface.

[0049] In some arrangements, a first wireless communication device (eg, a first UE) may transmit a beam measurement configuration and / or beam reference signaling (RS) to a second wireless communication device (eg, a second UE).

[0050] In some arrangements, the first wireless communication device may initiate a beam measurement procedure. When the beam measurement procedure is initiated, the first UE may transmit a beam measurement configuration and / or a beam reference signaling (RS) to the second wireless communication device.

[0051] In some arrangements, the beam RS can be a reference signal received power (Reference Signal Received Power, referred to as RSRP) reference signal, a channel state information (CSI) reference signal, a sidelink master information block (slidelink mater information block, referred to as SL-MIB), or a synchronization signal block (Synchronization Signal Block, referred to as SSB), or a sounding reference signal (Sounding Reference Signals, referred to as SRS).

[0052] The second wireless communication device may report the measurement result to the first wireless communication device. The first wireless communication device may receive the beam measurement result from the second wireless communication device via the sidelink interface. Based on the received beam measurement result, the first wireless communication device may understand / know / determine which beam can be used for sidelink communication, or whether the selected beam is still working / operating / running normally.

[0053] In some arrangements, the first UE may not always transmit a beam RS on a sidelink resource, thereby enabling the second UE to understand / know whether the beam RS exists and / or the resource location of the beam RS. The beam measurement configuration may include at least one of the following: (1) an indication of whether the beam RS exists; (2) an indication of whether the second wireless communication device (e.g., the second UE) receiving the configuration is to measure the beam RS; (3) an indication of whether the second wireless communication device (e.g., the second UE) receiving the configuration is to report the beam measurement result to the first wireless communication device (e.g., the first UE); (4) resource configuration of the beam RS; (5) an identifier (ID) of the beam measurement configuration; (6) a beam measurement report configuration of the beam measurement result; (7) a measurement request indicating whether the second wireless communication device is to report the beam measurement result.

[0054] In some arrangements, the first UE may include a measurement report configuration in the beam measurement configuration so that the second UE understands / knows when to send the beam measurement result. The beam measurement report configuration may include a beam RS measurement threshold. The beam RS measurement threshold may be an RSRP threshold. If the measurement result of the beam RS is lower than the beam RS measurement threshold, the second UE may send the beam measurement result to the first UE. In another arrangement, when the corresponding measurement result of the beam RS is higher than the beam RS measurement threshold, it is not necessary to send all measurement results to the first UE, and the second UE may include at least one of the following: the ID of the beam RS, the ID of the beam measurement configuration. In another arrangement, the beam measurement report configuration may include a period for reporting the measurement results. The second UE may periodically send the beam measurement result to the first UE.

[0055] In some arrangements, the first UE may include a beam RS resource configuration in the beam measurement configuration so that the second UE understands / knows detailed information of the beam RS. The beam RS resource configuration may include at least one of the following: an ID of the beam RS, a frequency resource position of the beam RS (e.g., a frequency resource on which the beam RS is carried), a time resource position of the beam RS (e.g., a time resource on which the beam RS is carried), a beam RS transmission period of the resources of the beam RS (e.g., a beam RS transmission period), an offset of the resources of the beam RS, a beam RS type of the resources of the beam RS (e.g., the beam RS may be at least one of a reference signal received power (RSRP) reference signal, a channel state information (CSI) reference signal, a sidelink master information block (SL-MIB), a synchronization signal block (SSB)), a time slot index of the beam RS (e.g., a time slot index on which the beam RS is carried), or a resource pool ID of the beam RS (e.g., an ID of a resource pool on which the beam RS is carried).

[0056] In some arrangements, the first UE may transmit different beam RSs in different resources or in different configurations. The beam measurement configuration may include an ID identifying the beam measurement configuration. The ID of the beam measurement configuration may be at least one of the following: a beam index, an ID of a beam RS, or an ID of a beam measurement configuration.

[0057] In some arrangements, the beam measurement configuration may be included in at least one of the following: a system information block (SIB), a radio resource control (RRC) signaling, a resource pool configuration, a medium access control (MAC) control element (CE), or sidelink control information (SCI).

[0058] In some arrangements, the first UE may be under the control of a network. The beam measurement configuration may be configured by the network. In some arrangements, the first UE may communicate with more than one second UE. In order to identify the second UE to which the beam measurement configuration belongs, the beam measurement configuration may include an ID of the second UE. The ID of the second UE may be a destination layer 2 ID. In some arrangements, when the first UE transmits the beam measurement configuration to the second UE, in order to ensure the quality of service (Quality of Service, referred to as QoS) of the beam measurement configuration, the beam measurement configuration received from the network may include a delay bound for the beam measurement configuration. The delay bound indicates the delay requirement of the corresponding message.

[0059] In another arrangement, the delay bound of the beam measurement configuration indicates the delay bound of the beam measurement process. In other words, the delay bound indicates N beam measurement configurations, N being an integer.

[0060] Figure 6 An example implementation is shown in FIG. Figure 6is a schematic diagram of a beam measurement configuration transmission 610 according to various arrangements. Figure 6 As shown, the delay bound 620 of the beam measurement process indicates N=6 beam measurement configuration transmissions 610. Two beam measurement configuration transmissions 610 are outside the delay bound 630.

[0061] In one arrangement, since the channel may change rapidly, the beam measurement result may also change rapidly. The first UE may need to obtain the beam measurement result as soon as possible. Therefore, the beam measurement configuration may include at least one of the following: a delay bound for the beam measurement result, and a packet delay budget for the beam measurement result.

[0062] In one arrangement, in order to select the best beam (e.g., spatial direction), the first UE may initiate a beam scanning process to transmit beam RSs in different beam directions, thereby determining how many beam directions to use based on the UE implementation or the UE's capabilities. After completing the beam scanning, the first UE obtains measurement results of different beams from the second UE. The first UE understands / knows / determines which beam is the best beam based on the measurement results. The beam scanning process may be that the first UE transmits beam RSs in different beam directions, and the second UE measures beam RSs in different beam directions. The second UE reports the measurement results to the first UE. Therefore, in order to complete the beam scanning process, in addition to transmitting beam RSs in different directions, the first UE transmits a corresponding beam measurement configuration to trigger and obtain beam measurement results of beam RSs in different beam directions. As a result, when the beam measurement process is initiated, the first UE transmits N beam measurement configurations, where N is an integer.

[0063] In one arrangement, the first UE may periodically initiate a beam measurement procedure to monitor channel quality. The first UE may maintain a beam measurement timer. Once / when the beam measurement procedure is initiated, the first UE may start the beam measurement timer. When the beam measurement timer expires, the first UE may initiate the beam measurement procedure. In some arrangements, the beam measurement timer may be included in the beam measurement configuration.

[0064] Once / when the beam measurement process is started, the first UE transmits one or more beam measurement configurations to the second UE. The number of beam measurement configurations may depend on / based on the implementation of the first UE, but the maximum number of beam measurement configuration transmissions may be configured by the network or the second UE. The beam measurement configuration may include the maximum number of beam measurement configuration transmissions. For example, the first UE obtains beam measurement results for four beams in different beam directions, and then the first UE transmits four beam measurement configurations. After completing all transmissions of the beam measurement configurations, the first UE stops the beam measurement process. Figure 7 An example implementation is shown in FIG. Figure 77 is a schematic diagram of beam measurement configuration transmission 710 according to various arrangements. The period 720 of the beam measurement configuration transmission is the beam configuration transmission timer, and the period 740 of the beam measurement process is the beam measurement timer.

[0065] In some arrangements, the first UE performs the beam measurement process 730 under the control of the network. When performing the beam measurement process 730, the first UE reports at least one of the following to the network for resource allocation: (1) a period 720 of beam measurement configuration transmission (e.g., a beam configuration transmission timer), a period 740 of the beam measurement process (e.g., a beam measurement timer), a delay limit of the beam measurement process (e.g., 620), and a maximum number of beam measurement configuration transmissions.

[0066] In some arrangements, the delay bound may be a packet delay budget.

[0067] In some arrangements, when the beam measurement procedure is initiated, the number of beam measurement configuration transmissions may depend on / based on the capabilities of the first UE. In some arrangements, once / when the beam measurement procedure is initiated, the first UE starts a beam configuration transmission timer in order to transmit N beam measurement configurations. Once / when the beam configuration transmission timer expires, the first UE transmits the beam measurement configuration. In another arrangement, when the first UE has already transmitted one beam measurement configuration, the first UE transmits another beam measurement configuration.

[0068] In some arrangements, once / when the number of beam measurement configuration transmissions reaches the maximum number of beam measurement configuration transmissions, the first UE stops the beam measurement process. In some arrangements, when the number of beam measurement configuration transmissions reaches the maximum number of beam measurement configuration transmissions, the first UE stops the beam configuration transmission timer.

[0069] In some arrangements, when the first UE is about to establish a unicast link, the first UE may be biased to select the best beam for data transmission. The first UE may initiate a beam measurement process to select the best beam. Similarly, when a DCR message is generated and the first UE is about to establish a unicast link, the first UE starts an initial beam scan to select the best beam. Similarly, when a sidelink SRB message (e.g., SRB0 message, DCR message, direct link establishment request message) is generated and the first UE is about to establish a unicast link, the first UE starts an initial beam scan to select the best beam. In order to establish a unicast link, the first UE and the second UE exchange at least one of the following messages: DCR message, DCR response message, direct link establishment request message, direct link establishment response message, direct link security mode command, direct link security mode complete, sidelink SRB message, sidelink discovery message.

[0070] In some arrangements, when beam failure is detected, the first UE selects another beam for data transmission. The first UE initiates a beam measurement process to select the best beam. Similarly, when the beam RS measurement value of the currently selected beam is lower than the configured beam RS threshold, the current beam may not be suitable for data transmission. The first UE initiates a beam measurement process to select the best beam.

[0071] In some arrangements, the first wireless communication device receives a beam measurement result that is below a beam RS measurement threshold, indicating that the current beam is not a suitable beam for communication. The first wireless communication device initiates a beam measurement process to select another beam for communication.

[0072] In some arrangements, a first wireless communication device (e.g., a first UE) initiates a beam measurement process when at least one of the following occurs: the first UE is about to establish a unicast link, the first wireless communication device transmits a first message (e.g., a sidelink signaling radio bearer (SL-SRB) message, a direct communication request (DCR) message, a DCR response message, a direct link setup request message, a direct link setup response message, a direct link security mode command, a direct link security mode complete, a sidelink SRB message, a sidelink discovery message), a beam failure is detected, a beam measurement result is lower than a beam RS measurement threshold, a beam recovery signaling is received, and a beam recovery process is initiated. The first UE multiplexes the measurement configuration and the first message into the same medium access control protocol data unit (MAC PDU).

[0073] In some arrangements, the first message may be at least one of: a sidelink signaling radio bearer (SL-SRB) message, a direct communication request (DCR) message, a DCR response message, a direct link setup request message, a direct link setup response message, a direct link security mode command, a direct link security mode complete, a sidelink SRB message, a sidelink discovery message.

[0074] In some examples, the second UE receives at least one of a beam measurement configuration and a beam reference signal (RS) from the first UE via a sidelink interface. The second UE uses the beam measurement configuration to measure the beam RS. The second UE transmits the beam measurement result to the first UE via the sidelink interface.

[0075] In some examples, the second UE initiates a beam measurement reporting process to send a beam measurement result to the first UE. The second UE maintains a beam reporting timer (e.g., beamreporttimer) for the beam measurement reporting process. The beam measurement reporting timer may be included in the beam measurement configuration. In some examples, the beam measurement reporting timer may be set to a delay bound of the beam measurement result included in the beam measurement configuration.

[0076] An example implementation of the beam measurement reporting process is shown below:

[0077] 1> If the beam measurement reporting process has been triggered and not canceled:

[0078] 2> If the beam measurement reporting timer of the triggered beam measurement reporting process is not running:

[0079] 3> Start the beam measurement reporting timer.

[0080] 2> If the beam measurement report expires:

[0081] 3>Cancel the triggered beam measurement reporting process.

[0082] 2> Otherwise, if the second UE has resources allocated for the new transmission and the resources can accommodate the beam measurement results, the second UE performs at least one of the following:

[0083] 3>Generate beam measurement results;

[0084] 3> Stop beam measurement reporting;

[0085] 3>Cancel the triggered beam measurement reporting process.

[0086] 2> Otherwise, if the second UE has configured sidelink resource allocation mode 1:

[0087] 3>Trigger scheduling request.

[0088] The wireless communication device has some conditions to report the beam measurement results (or start the beam measurement reporting process). When the second UE receives a beam measurement configuration including at least one of the following items, the second UE reports the beam measurement results to the first UE: (1) an indication of whether the beam RS exists; (2) an indication of whether the second wireless communication device (e.g., the second UE) receiving the beam measurement configuration is to measure the beam RS; (3) an indication of whether the second UE receiving the beam measurement configuration is to report the beam measurement results to the first UE, and (4) a measurement request indicating whether the second UE is to report the beam measurement results.

[0089] In order to limit the number of measurement results reported, some reporting conditions can be considered. In some arrangements, when the beam measurement result of the beam RS is lower than the beam RS measurement threshold included in the beam measurement configuration, the second UE reports the beam measurement result to the first UE. In some arrangements, if a beam failure of a beam in the sidelink interface is detected, the second UE reports the beam measurement result to the first UE. In some arrangements, the second UE periodically transmits the beam measurement result to the first UE.

[0090] In some arrangements, in response to receiving a first message from the first UE on the PSSCH, the second UE transmits the beam measurement result to the first UE. The first message may include at least one of the following: a sidelink signaling radio bearer (SL-SRB) message, a direct communication request (DCR) message, a DCR response message, a PC5-S message, a direct link establishment request, a direct link security mode complete, a discovery message. The second UE multiplexes the measurement result and the first message into the same MAC PDU.

[0091] In some arrangements, in order to identify which beam measurement configuration the beam measurement result belongs to, the beam measurement result may include the beam measurement configuration. ID-related information in the beam measurement may be included in the beam measurement result, for example, (1) an identifier (ID) of the measurement configuration; (2) a time slot index of the measurement beam RS (e.g., the measured beam RS); (3) an ID of the beam RS, and (4) a beam index.

[0092] In some arrangements, the beam measurement results may include a reference signal received power (RSRP) value of the beam RS.

[0093] In some arrangements, the second UE may communicate with multiple wireless communication devices (e.g., more than one transmit (TX) UE) via multiple sidelink interfaces. Therefore, the UE may not use the same receive (RX) beam to receive data from different TXUEs. In order to avoid frequent beam switching or when a beam failure is detected, the second UE provides a beam recommendation from the perspective of the second UE. The beam measurement result may include a beam recommendation, which may be at least one of the following: (1) a recommended beam for communication; (2) a preferred beam for communication; (3) a non-preferred beam for communication; (4) a candidate beam for communication. In some arrangements, the beam recommendation may be identified by at least one of the following: an ID of a beam measurement configuration, an ID of a beam RS, a beam index. In an example where the first UE uses four beams for communication and beam-1 has the highest measurement result, the first UE selects beam-1 to communicate with the second UE. In the case where the second UE may also need to receive data from a third UE. Therefore, the second UE sends a beam recommendation indicating that beam-2 is a preferred beam / recommended beam for communication. Alternatively, the second UE sends a beam recommendation indicating that beam-1 is a non-preferred beam for communication. Then, the first UE does not select beam-1, but selects beam-2 to communicate with the second UE.

[0094] In some arrangements, before receiving the beam recommendation from the second UE, the first UE sends at least one candidate beam to the second UE. The beam measurement configuration may include at least one candidate beam. When sending the beam recommendation, only the candidate beams included in the beam measurement configuration may be selected as the beam recommendation.

[0095] In some arrangements, not all beams are suitable beams for communication, and only suitable beams with measurement results above a threshold are included in the beam measurement results. When the beam RS measurement result of the recommended beam is above the beam RS measurement threshold, the beam measurement results include the recommended beam. In some arrangements, when the beam RS measurement result of the preferred beam is above the beam RS measurement threshold, the beam measurement results include the preferred beam. In some arrangements, when the beam RS measurement result of the candidate beam is above the beam RS measurement threshold, the beam measurement results include the candidate beam. When the beam RS measurement result of the beam recommendation is above the beam RS measurement threshold, the beam recommendation is included in the beam measurement results.

[0096] When the first UE determines which beam to use for communication, at least one of the following recommendations may be considered: (1) a recommended beam to be used for communication; (2) a preferred beam to be used for communication; (3) a non-preferred beam for communication; (4) a candidate beam for communication.

[0097] In some arrangements, the first UE may need to transmit the beam measurement configuration as quickly as possible, so the first UE is configured with a delay bound for the beam measurement configuration. The beam measurement configuration may include the beam measurement configuration.

[0098] The wireless communication device has the conditions to perform measurements. In some arrangements, the beam RS may be associated with the PSSCH transmission. For example, the beam RS and the PSSCH may be located in the same time slot. If the first UE transmits the PSSCH on the same time slot, the first UE only transmits the beam RS. In this case, if the second UE receives the first message from the first UE on the PSSCH, the second UE measures the beam RS and can obtain the beam RS measurement result to be reported to the first UE. If the second UE does not receive the first message from the first UE on the PSSCH, the first UE does not transmit the beam RS on the corresponding resources of the beam RS.

[0099] Figure 4 is a flow chart of an example method for device-to-device communication on frequency range 2 (FR2) according to various arrangements. In some arrangements, a first wireless communication device (e.g., a first UE) communicates with a second wireless communication device (e.g., a second UE) via a sidelink interface. The first wireless communication device (e.g., the first UE) determines a beam failure on the sidelink interface. In response to determining the beam failure, the first wireless communication device initiates a beam recovery process. For example, the beam recovery process may be: sending a beam recovery signal to the second communication device via the sidelink interface. The first wireless communication device determines whether the beam recovery process is successfully completed or failed, for example, if a beam recovery response signal is received from the second wireless communication device, then the beam recovery process is determined to be successful.

[0100] The wireless communication device has some conditions to detect beam failure. In some arrangements, once / when the number of consecutive missing physical sidelink feedback channel (PSFCH) receptions (e.g., how many times the missing PSFCH receptions occurred) reaches the configured maximum PSFCH missing value, the first wireless communication device (e.g., the first UE) considers that a beam failure is detected.

[0101] An implementation example is shown below (numConsecutiveDTX is a counter):

[0102]

[0103] In some arrangements, in response to determining that the measurement result of the beam RS is lower than the beam RS measurement threshold, the first UE considers that a beam failure has been detected.

[0104] In some embodiments, the first UE considers that a beam failure has been detected in response to at least the following occurrence: (i) in response to receiving an indication from a sidelink RLC entity that a maximum number of retransmissions has been reached; (ii) in response to determining that T400 has expired (T400 is initiated in response to transmission of an RRCReconfigurationSidelink message); (iii) in response to receiving an indication that a maximum number of consecutive HARQ DTXs has been reached; (iv) in response to receiving an integrity check failure indication from a sidelink PDCP entity.

[0105] In some embodiments, the first UE may measure the beam RS to detect beam failure. If the first UE receives N beam failure indications from the physical layer, where N is an integer and N is greater than the maximum number of beam failure indications, the first UE may consider / determine that beam failure is detected.

[0106] In some embodiments, the first UE may maintain a beam failure indication counter. If the first UE receives a beam failure indication from the physical layer, the first UE may increment the beam failure indication counter by 1. In response to the beam failure indication counter reaching a maximum number of beam failure indications, the first UE may consider / determine that a beam failure is detected.

[0107] In some embodiments, the first UE may maintain a beam failure detection timer. If the first UE receives a beam failure indication from the physical layer, the first UE may start the beam failure detection timer. If the beam failure detection timer expires, the first UE may set the beam failure indication counter to zero. In some embodiments, the beam measurement configuration may include at least one of the following: a beam failure detection timer, or a maximum number of beam failure indications.

[0108] The implementation example is as follows:

[0109] 1> If a beam failure instance indication has been received from the physical layer:

[0110] 2>Start or restart beamFailureDetectionTimer;

[0111] 2>Increment BFI_COUNTER by 1;

[0112] 2> if BFI_COUNTER>= beamFailureInstanceMaxCount:

[0113] 3> It is considered that the beam detection fails;

[0114] In some arrangements, the first UE may not be able to directly detect beam failure itself. For example, when receiving a beam failure indication from the second UE, the first UE may determine that a beam failure is detected.

[0115] After the wireless communication device detects a beam failure, there are some transmit (Transmit, TX for short) side actions. In some arrangements, the first UE may be under the control of the network. Therefore, the network may know the beam failure. If a beam failure is detected, the first UE may report at least one of the following to the network: (1) an indication that a beam failure is detected; or (2) a destination layer 2 identifier (ID) of the beam on which the beam failure is detected. In some arrangements, the indication that a beam failure is detected is included in a sidelink UE information message (SUI). If a beam failure is detected and the beam recovery process fails, the first UE may report at least one of the following to the network: (1) an indication that a beam failure is detected; or (2) a destination layer 2 identifier (ID) of the beam on which the beam failure is detected.

[0116] After initiating the beam recovery process, the first UE may determine whether the recovery process is successfully completed or failed. In response to determining that the first UE does not receive a beam recovery response signal from the second UE, the beam recovery process fails. In response to determining that the first UE receives a beam recovery response signal from the second UE, the beam recovery process succeeds.

[0117] In some arrangements, once / when the beam recovery process is performed, the first UE transmits a beam recovery signal to the second UE. The beam recovery signal may include a beam measurement configuration. The first UE receives a beam recovery response signal from the second UE. The beam recovery response signal may include a beam measurement result. In some arrangements, once / when the first UE does not receive a beam recovery response signal from the second UE, the first UE considers that the beam recovery process has failed.

[0118] In some arrangements, the second UE detects a beam failure, but the recovery process is initiated by the first UE. In this case, when the first UE initiates the beam recovery process, the beam recovery signal may include a beam measurement configuration to trigger the second UE to measure the beam RS to select another beam. At the same time, the beam recovery response signal may include the beam measurement result of the first UE to select another beam.

[0119] In some arrangements, beam recovery signaling may include beam measurements.

[0120] In some arrangements, the first UE detects a beam failure and a recovery procedure is initiated by the first UE. In this case, when the first UE initiates the beam recovery procedure, the beam recovery signal may include beam measurement results.

[0121] In some arrangements, the beam recovery response signal may be a hybrid automatic repeat request (HARQ) feedback on the PSFCH.

[0122] In some arrangements, after transmitting a beam recovery signal, if the first UE does not receive beam recovery response signaling, the first UE retransmits the beam recovery signal. In response to the number of beam recovery signal transmissions reaching the maximum number of beam recovery signal transmissions, the first UE stops transmitting the beam recovery signal. If the first UE still does not receive the beam recovery response signal, the first UE considers that the beam recovery process has failed. The beam measurement configuration may include the maximum number of beam recovery signal transmissions.

[0123] In some arrangements, the second UE needs to send the beam recovery response signal as quickly as possible, so the first UE sets a delay bound on the beam recovery response signal to the second UE. The beam measurement configuration may include a delay bound on the beam recovery response signal.

[0124] In some arrangements, the first UE may need to transmit the beam recovery signal as quickly as possible to complete the recovery process, and therefore the first UE is configured with a delay bound for the beam recovery signal from the network. The beam measurement configuration may include a delay bound for the beam recovery signal.

[0125] In some arrangements, since the first UE can select the sidelink resources by itself (e.g., sidelink resource allocation mode 2), after detecting beam failure, the first UE can trigger at least one of resource reselection and resource pool reselection.

[0126] In some arrangements, the beam recovery response signal may be a new sidelink transmission indicated by the SCI.

[0127] In some arrangements, if the first UE receives a beam recovery response signal, the first UE considers that the beam is recovered (eg, the beam recovery process is successful).

[0128] In some arrangements, once / when beam recovery is performed, the first UE may start a beam recovery timer. Once / when the beam recovery timer expires, the first UE considers that the beam recovery has failed. Once / when the beam failure recovery is completely successful, the first UE stops the beam recovery timer. In some arrangements, the beam recovery timer may be included in the beam measurement configuration.

[0129] In response to determining that the beam recovery process has failed, the first UE may determine that a radio link failure (RLF) has been detected.

[0130] After the second wireless communication device detects a beam failure, there are some receive (Receive, referred to as RX) side actions. In some examples, the second UE receives a beam recovery signal from the first UE via a side link interface. The second UE sends a beam recovery response signal to the first UE via the side link interface. In some arrangements, once / when a beam failure is detected, the second UE transmits a beam failure indication signal to the first UE.

[0131] In some arrangements, the beam failure indication signal may include at least one of the following: (1) beam measurement results; (2) an indication that a beam failure was detected; (3) beam measurement results.

[0132] In some arrangements, in response to receiving a beam failure indication signal from the second UE, the first UE performs a beam recovery procedure.

[0133] In some implementations, the beam recovery response message may be a HARQ ACK or NACK message on a physical sidelink feedback channel (PSFCH).

[0134] In some arrangements, if the measurement result is above the beam RS measurement threshold, the first UE considers / determines that the beam recovery process is completely successful.

[0135] In some arrangements, in response to determining that the measurement result is below the beam RS measurement threshold, the first UE considers / determines that the beam recovery process has failed.

[0136] In some arrangements, the second UE may measure the beam RS using the beam measurement configuration.

[0137] It should be understood that one or more features from the above-mentioned implementation examples are not exclusive of a specific implementation example, but can be combined in any manner (eg, in any priority and / or order, simultaneously or otherwise).

[0138] Some implementation examples are shown below:

[0139] Example 1:

[0140] Step 1: The first UE sends a direct communication request message (Direct Communication Request, referred to as DCR) to the second UE to establish a unicast link.

[0141] Step 2: Since the first UE wants to establish a unicast link, the first UE may initiate a beam measurement process to periodically transmit N beam measurement configuration messages and M beam reference signals to the second UE. N and M are integers, and N and M may be determined based on the capability of the first UE.

[0142] Step 3: The second UE may receive the DCR message, the beam measurement configuration message, and the beam RS. Since the second UE knows that the first UE wants to establish a unicast link. Based on the beam measurement configuration, the second UE may measure the beam RS and generate a beam measurement result. The second UE may initiate a beam measurement process to transmit N beam measurement configuration messages and M beam RSs, thereby selecting a beam for data transmission from the second UE to the first UE.

[0143] Step 4: The second UE sends the beam measurement result to the first UE.

[0144] Example 2 (the first UE detects beam failure and initiates a recovery process, and initiates a beam measurement process):

[0145] Step 1: The first UE detects beam failure.

[0146] Step 2: When beam failure is detected, the first UE initiates a beam measurement procedure to periodically transmit N beam measurement configuration messages and M beam indications to the second UE. NN and M are integers. N and M can be determined based on the capabilities of the first UE. The first UE initiates a beam recovery procedure to transmit a beam recovery signal to the second UE. If the beam recovery procedure is initiated, the first UE starts a beam recovery timer.

[0147] Step 3: The first UE receives the beam measurement result and the beam recovery response message from the second UE. If the beam recovery response message is received and the beam recovery timer is running, the first UE considers / determines that the beam recovery process is successfully completed and stops the beam recovery timer. If the beam recovery time expires, the first UE considers / determines that the beam recovery process has failed and considers / determines that RLF is detected.

[0148] Example 3 (the first UE detects beam failure and initiates a beam measurement process, and the second UE initiates a recovery process):

[0149] Step 1: The first UE detects beam failure.

[0150] Step 2: When beam failure is detected, the first UE transmits a beam failure indication to the second UE. And the first UE initiates a beam measurement process to periodically transmit N beam measurement configuration messages and M beam RSs to the second UE. N and M are integers and depend on the capabilities of the first UE.

[0151] Step 3: After receiving the beam failure indication, the second UE starts a beam recovery process to transmit a beam recovery signal to the first UE. If the beam recovery process is started, the second UE starts a beam recovery timer.

[0152] Step 4: The second UE receives a beam recovery response signal from the first UE. If the beam recovery response message is received and the beam recovery timer is running, the second UE considers that the beam recovery process is successfully completed and stops the beam recovery timer. If the beam recovery time expires, the second UE considers that the beam recovery process has failed and that RLF is detected.

[0153] Example 4 (the first UE detects beam failure and initiates a beam recovery process, and the second UE initiates a beam measurement process):

[0154] Step 1: The first UE detects beam failure.

[0155] Step 2: When beam failure is detected, the first UE starts a beam recovery process to transmit a beam recovery signal to the first UE. If the beam recovery process is started, the first UE starts a beam recovery timer.

[0156] Step 3: After receiving the beam recovery signal, the second UE initiates a beam measurement process to periodically transmit N beam measurement configuration messages and M beam reference signals to the first UE. N and M are integers, and N and M can be determined based on the capability of the first UE.

[0157] Step 4: The second UE receives the beam measurement result from the first UE and transmits a beam recovery response message to the first UE. For the first UE, if the beam recovery signal is received and the beam recovery timer is running, the first UE considers / determines that the beam recovery process is successfully completed and stops the beam recovery timer. If the beam recovery time expires, the first UE considers / determines that the beam recovery process has failed and considers / determines that RLF is detected.

[0158] Example 5 (the first UE detects a beam failure, the second UE initiates a beam measurement process, and the second UE initiates a recovery process):

[0159] Step 1: The first UE detects beam failure.

[0160] Step 2: When beam failure is detected, the first UE transmits a beam failure indication to the second UE.

[0161] Step 3: After receiving the beam failure indication, the second UE starts a beam recovery process to transmit a beam recovery signal to the first UE. If the beam recovery process is started, the second UE starts a beam recovery timer. The second UE starts a beam measurement process to periodically transmit N beam measurement configuration messages and M beam RSs to the first UE. N and M are integers, and N and M can be determined based on the capabilities of the second UE.

[0162] Step 4: The second UE receives the beam measurement result and the beam recovery response message from the first UE. If the beam recovery response message is received and the beam recovery timer is running, the second UE considers / determines that the beam recovery process is successfully completed and stops the beam recovery timer. If the beam recovery time expires, the second UE considers / determines that the beam recovery process has failed and considers / determines that RLF is detected.

[0163] Figure 5 A flow chart of a method 500 for device-to-device communication in frequency range 2 (FR2) is shown. The method 500 may be used in conjunction with FIG. 1 and FIG. Figure 2 The method 500 may be implemented by any one or more components and devices described in detail. In general, in some embodiments, the method 500 may be performed by a wireless communication device. Depending on the embodiment, additional, fewer or different operations may be performed in the method 500. At least one aspect of the operation involves a system, method, apparatus or computer-readable medium.

[0164] Some arrangements of the present disclosure relate to systems, methods, apparatuses, and non-transitory computer-readable media, including: a first wireless communication device communicates with a second wireless communication device via a sidelink interface. The first wireless communication device sends at least one of a beam measurement configuration and a beam reference signal (RS) to the second wireless communication device via the sidelink interface. The first wireless communication device receives a beam measurement result from the second wireless communication device via the sidelink interface.

[0165] In some arrangements, sending the beam measurement configuration may include initiating a beam measurement procedure. The beam measurement procedure is initiated in response to at least one of the following: expiration of a beam measurement timer; determining that the first wireless communication device is to establish a unicast link; generating a direct communication request (DCR) message; generating a discovery message; generating a sidelink signaling radio bearer (SRB) message; detecting a beam failure. In response to initiating the beam measurement procedure, the first wireless communication device performs at least one of the following: starting a beam measurement timer; starting a beam configuration transmission timer; transmitting a beam measurement configuration. In response to determining that the beam configuration transmission timer has expired, the first wireless communication device may transmit the beam measurement configuration.

[0166] In some arrangements, the first wireless communication device restarts the beam configuration transmission timer. In response to transmitting the first beam measurement configuration, the first wireless communication device transmits the second beam measurement configuration. In response to determining that the number of beam measurement configuration transmissions reaches a maximum number of beam measurement configuration transmissions, at least one of the following is performed: the first wireless communication device stops the beam measurement process, and the first wireless communication device can stop the beam measurement transmission timer.

[0167] In some arrangements, the beam measurement configuration may include at least one of the following: a beam configuration transmission timer; a beam measurement timer; a maximum number of beam measurement configuration transmissions; a beam recovery timer; a beam failure detection timer; a maximum number of beam failure indications; a delay limit for a beam measurement result; a delay limit for a beam measurement configuration; a delay limit for a beam recovery signal; a delay limit for a beam recovery response signal; a maximum number of beam recovery signal transmissions; an indication indicating whether a beam RS exists; an indication indicating whether a second wireless communication device receiving the beam measurement configuration is to measure the beam RS; an indication indicating whether the second wireless communication device receiving the beam measurement configuration is to report the beam measurement result to the first wireless communication device; a resource configuration for the beam RS; an identifier (ID) of the beam measurement configuration; an ID of a candidate beam; a measurement request indicating whether the second wireless communication device is to report the beam measurement result; a beam measurement report configuration for the beam measurement result; a beam index. The beam measurement configuration may include a beam measurement report configuration. The beam measurement report configuration may include at least one of the following: a beam RS measurement threshold; or a period for reporting measurement results.

[0168] In some arrangements, the beam measurement configuration may include a beam RS resource configuration for the beam RS. The beam RS resource configuration for the beam RS may include at least one of the following: a beam index, a frequency resource position of the beam RS; a time resource position of the beam RS; a period of the resources of the beam RS; a resource type of the resources of the beam RS (e.g., an RSRP reference signal, a CSI reference signal, a SL-MIB, or an SSB); a time slot index of a time slot of the beam RS; a resource pool identifier (ID) of the beam RS; an ID of the beam RS. The beam measurement configuration may be included in at least one of a system information block (SIB), a radio resource control (RRC) signaling, a medium access control (MAC) control element (CE), a sidelink control signaling (SCI), and a resource pool configuration. The beam measurement configuration may be received from the network.

[0169] Some arrangements of the present disclosure relate to systems, methods, apparatuses, and non-volatile computer-readable media, including: a second wireless communication device communicates with a first wireless communication device via a sidelink interface. The second wireless communication device receives at least one of a beam measurement configuration and a beam reference signal (RS) from the first wireless communication device via the sidelink interface. The second wireless communication device may use the beam measurement configuration to measure the beam RS. The second wireless communication device sends the beam measurement result to the first wireless communication device via the sidelink interface. The beam measurement configuration may include at least one of the following: a beam RS measurement threshold; a measurement request indicating whether the second wireless communication device is to report the beam measurement result; a delay limit for the beam measurement result; an indication indicating the existence of the beam RS; an indication indicating that the second wireless communication device receiving the beam measurement configuration is to measure the beam RS; an indication indicating that the second wireless communication device receiving the beam measurement configuration is to report the beam measurement result to the first wireless communication device.

[0170] In some arrangements, the second wireless communication device may send a beam measurement result in response to at least one of the following: determining that the beam measurement result is below a beam RS measurement threshold; determining that a beam in a sidelink interface fails; determining that the beam measurement result is to be sent according to a periodicity; receiving a first message from the first wireless communication device, the first message including at least one of a sidelink signaling radio bearer (SL-SRB) message, a direct communication request (DCR) message, or a DCR response message. The beam measurement result may include at least one of the following: a measurement value of a beam RS; a recommended beam for communication; a preferred beam for communication; a non-preferred beam for communication; a candidate beam for communication; an identifier (ID) of a beam measurement configuration; a time slot index of a time slot of a beam RS; a time slot number of a time slot of a beam RS; an ID of a beam RS; a beam index; an ID of a candidate beam RS, the candidate beam RS being recommended by the second wireless communication; an ID of a beam RS having the best measurement value among a plurality of beam RSs; a time slot index of a time slot of a beam RS.

[0171] In some arrangements, the measurement value is at least one of an RSRP value, a CSI value, and a measurement value above a beam RS measurement threshold. A recommended beam, a preferred beam, a non-preferred beam, or a candidate beam may be identified by at least one of: an ID of a beam measurement configuration; an ID of a beam RS; a beam index.

[0172] Some arrangements of the present disclosure relate to systems, methods, apparatuses, and non-volatile computer-readable media, including: a first wireless communication device communicates with a second wireless communication device via a sidelink interface. The first wireless communication device may determine a beam failure on the sidelink interface. In response to determining the beam failure, the first wireless communication device performs at least one of the following: initiating a beam recovery process; sending a beam indication signal indicating that a beam failure has been detected; sending a beam measurement configuration; initiating a beam measurement scanning process; triggering resource reselection; triggering resource pool reselection. The beam recovery process may include at least one of the following: the first wireless communication device sends a beam recovery signal to the second communication device via the sidelink interface; starts a beam recovery timer; receives a beam recovery response signal received from the second wireless communication device. The first wireless communication device determines beam failure in response to at least one of the following: determining that the number of beam failure indications from the physical layer reaches a maximum number of beam failure indications; determining that the number of beam failure indications from the physical layer exceeds the maximum number of beam failure indications; receiving beam recovery signaling; determining that the number of consecutive missing physical sidelink feedback channels (PSFCH) reaches a threshold; receiving an indication from a sidelink RLC entity indicating that a maximum number of retransmissions for a specific destination has been reached; determining that T400 for a specific destination has expired; receiving an indication from a MAC entity indicating that a maximum number of consecutive HARQ DTXs for a specific destination has been reached; receiving an integrity check failure indication for a specific destination from a sidelink PDCP entity; receiving a beam indication signal indicating that a beam failure has been detected.

[0173] In some arrangements, in response to detecting a beam failure, the first wireless communication device sends at least one of the following to the network: an indication of a detected beam failure; a destination layer 2 identifier (ID) of the beam on which the beam failure is detected. The first wireless communication device determines that the beam recovery process has failed in response to at least one of the following: the number of beam recovery signal transmissions reaches a maximum number of beam recovery signal transmissions; the beam measurement result is lower than the beam RS measurement threshold; the first wireless communication device does not receive a beam recovery response signal from the second wireless communication device; the beam recovery timer expires. The first wireless communication device determines that the beam recovery process is complete or successful in response to at least one of the following: the beam measurement result is higher than the beam RS measurement threshold; after receiving a beam failure indication from the physical layer, the beam failure detection timer is started; a beam recovery response signal is received from the second wireless communication device; a beam recovery response signal is received from the second wireless communication device and the beam recovery timer is running; the sidelink BWP has been reconfigured; the sidelink resource pool has been reconfigured; the beam measurement configuration has been reconfigured. The beam recovery signal may include at least one of the beam measurement configuration, the beam measurement result, and the detected beam failure indication. The beam recovery response signal may include at least one of a beam measurement result, HARQ feedback, and identification of a new sidelink transmission by sidelink control information (SCI). In response to determining that the beam recovery process has failed, the first wireless communication device determines that a radio link failure (RLF) has been detected.

[0174] Some arrangements of the present disclosure relate to systems, methods, apparatus, and non-volatile computer-readable media, including: a second wireless communication device communicates with a first wireless communication device via a sidelink interface. The second wireless communication device receives a beam recovery signal from the first wireless communication device via the sidelink interface. The second wireless communication device sends a beam recovery response signal to the first wireless communication device via the sidelink interface. The second wireless communication device determines a beam failure on the sidelink interface. The second wireless communication device sends a beam failure indication signal to the first wireless communication device. The first wireless communication device performs a beam recovery process in response to receiving the beam failure indication signal. The beam failure indication signal may include at least one of the following: a beam measurement result; an indication of a detected beam failure.

[0175] Although various arrangements of the present solution have been described above, it should be understood that they are given only in an exemplary and non-limiting manner. Similarly, various figures can depict example architectures or configurations, which are provided to enable those of ordinary skill in the art to understand the exemplary features and functions of the present solution. However, these personnel will understand that the present solution is not limited to the example architectures or configurations shown, but can be implemented using a variety of alternative architectures and configurations. In addition, as will be understood by those of ordinary skill in the art, one or more features of some arrangements can be combined with one or more features of another arrangement described herein. Therefore, the breadth and scope of the present disclosure should not be limited by any of the above-mentioned illustrative arrangements.

[0176] It should also be understood that any reference to an element herein using names such as "first," "second," etc. does not generally limit the number or order of those elements. Rather, these names may be used herein as a convenient means of distinguishing between two or more elements or instances of an element. Thus, a reference to a first and a second element does not indicate that only two elements may be used, or that the first element must be located before the second element in some manner.

[0177] In addition, those of ordinary skill in the art will appreciate that information and signals may be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, and symbols that may be referenced in the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0178] Those of ordinary skill in the art will further understand that any of the various illustrative logical blocks, modules, processors, devices, circuits, methods, and functions described in conjunction with the aspects disclosed herein may be implemented by electronic hardware (e.g., digital implementation, analog implementation, or a combination of both), firmware, various forms of programs or design codes containing instructions (for convenience, referred to herein as "software" or "software modules"), or any combination of these technologies. In order to clearly illustrate this interchangeability of hardware, firmware, and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functions. Whether such functionality is implemented as hardware, firmware, or software, or a combination of these technologies, depends on the specific application and the design constraints imposed on the overall system. A skilled person may implement the described functionality in various ways for each specific application, but such implementation decisions will not cause a departure from the scope of the present disclosure.

[0179] In addition, it will be understood by those skilled in the art that the various illustrative logic blocks, modules, devices, components and circuits described herein may be implemented or performed in an integrated circuit (IC) including a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic device, or any combination thereof. The logic blocks, modules and circuits may further include antennas and / or transceivers to communicate with various components within a network or within a device. A general purpose processor may be a microprocessor, but alternatively, the processor may be any conventional processor, controller or state machine. The processor may also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors combined with a DSP core, or any other suitable configuration to perform the functions described herein.

[0180] If implemented in software, the functions may be stored as one or more instructions or codes on a computer-readable medium. Therefore, the steps of the method or algorithm disclosed herein may be implemented as software stored on a computer-readable medium. Computer-readable media include computer storage media and communication media, and communication media include any media that enables a computer program or code to be transferred from one place to another. The storage medium can be any available medium that a computer can access. By way of example and not limitation, such computer-readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, and any other medium that can be used to store the desired program code in the form of instructions or data structures and can be accessed by a computer.

[0181] As used herein, the term "module" refers to software, firmware, hardware, and any combination of these elements to perform the relevant functions described herein. In addition, for the purpose of discussion, various modules are described as discrete modules; however, it is obvious to a person skilled in the art that two or more modules can be combined to form a single module that performs the relevant functions arranged according to the present solution.

[0182] In addition, memory or other storage and communication components may be used in the arrangement of the present solution. It should be understood that, for the sake of clarity, the above description has described the arrangement of the present solution with reference to different functional units and processors. However, it will be apparent that any appropriate distribution of functions between different functional units, processing logic elements or domains may be used without departing from the present solution. For example, functions illustrated as being performed by separate processing logic elements or controllers may be performed by the same processing logic element or controller. Therefore, references to specific functional units are only references to suitable devices for providing the described functions, rather than indicating a strict logical or physical structure or organization.

[0183] Various modifications to the arrangements described in this disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other arrangements without departing from the scope of this disclosure. Therefore, this disclosure is not intended to be limited to the arrangements shown herein, but is to be accorded the widest scope consistent with the novel features and principles disclosed herein, as set forth in the following claims.

Claims

1. A wireless communication method, characterized in that: include: The first wireless communication device communicates with the second wireless communication device via a sidelink interface; The first wireless communication device sends at least one of a beam measurement configuration or a beam reference signal RS to the second wireless communication device through the sidelink interface; The first wireless communication device receives beam measurement results from the second wireless communication device via the sidelink interface.

2. The method according to claim 1, characterized in that Sending the beam measurement configuration includes initiating a beam measurement process.

3. The method according to claim 2, characterized in that The beam measurement process is initiated in response to at least one of: The beam measurement timer expires; Determining that the first wireless communication device is to establish a unicast link; Generate a direct communication request DCR message; generating a discovery message; generating a sidelink signalling radio bearer (SRB) message; Failed to detect beam.

4. The method according to claim 2, characterized in that: In response to initiating the beam measurement process, the first wireless communication device performs at least one of the following: Start the beam measurement timer; Start the beam configuration transmission timer; The beam measurement configuration is transmitted.

5. The method according to claim 4, characterized in that Also includes: In response to determining that the beam configuration transmission timer has expired, the first wireless communication device transmits the beam measurement configuration.

6. The method according to claim 5, characterized in that Also includes: The first wireless communication device restarts the beam configuration transmission timer.

7. The method according to claim 4, characterized in that Also includes: In response to transmitting the first beam measurement configuration, the first wireless communication device transmits a second beam measurement configuration.

8. The method according to claim 4, characterized in that Also includes: In response to determining that the number of beam measurement configuration transmissions reaches a maximum number of beam measurement configuration transmissions, at least one of the following is performed: the first wireless communication device stops the beam measurement process, and the first wireless communication device stops the beam measurement transmission timer.

9. The method according to claim 1, characterized in that: The beam measurement configuration includes at least one of the following: Beam configuration transmission timer; Beam measurement timer; Maximum number of beam measurement configuration transmissions; Beam recovery timer; Beam failure detection timer; Maximum number of beam failure indications; a delay bound on the beam measurement result; a delay bound of the beam measurement configuration; a delay bound of the beam recovery signal; a delay bound of the beam recovery response signal; Maximum number of beam recovery signal transmissions; an indication indicating whether the beam RS exists; an indication of whether the second wireless communication device receiving the beam measurement configuration is to measure the beam RS; an indication of whether the second wireless communication device receiving the beam measurement configuration is to report the beam measurement result to the first wireless communication device; Resource configuration of the beam RS; An identifier ID of the beam measurement configuration; The ID of the candidate beam; Instructing the second wireless communication device whether to report a measurement request of the beam measurement result; A beam measurement reporting configuration of the beam measurement result; Beam index.

10. The method according to claim 2, characterized in that The beam measurement configuration includes a beam measurement report configuration; The beam measurement report configuration includes at least one of the following: Beam RS measurement threshold; The period at which the measurements are reported.

11. The method according to claim 1, characterized in that: The beam measurement configuration includes a beam RS resource configuration for the beam RS; The beam RS resource configuration for the beam RS includes at least one of the following: Beam index; The frequency resource position of the beam RS; The time resource position of the beam RS; The period of the resources of the beam RS; The resource type of the resource of the beam RS; A time slot index of a time slot of the beam RS; A resource pool identifier ID of the beam RS; The ID of the beam RS.

12. The method according to claim 1, characterized in that The beam measurement configuration is included in at least one of a system information block SIB, a radio resource control RRC signaling, a medium access control MAC control element CE, a sidelink control signaling SCI or a resource pool configuration.

13. The method according to claim 1, characterized in that The beam measurement configuration is received from a network.

14. A wireless communication device, characterized in that: include: At least one processor and a memory, wherein the at least one processor is configured to read the code from the memory and implement the method according to claim 1.

15. A computer program product, characterized in that include: A computer readable program medium having code stored thereon, which, when executed by at least one processor, causes the at least one processor to implement the method according to claim 1.

16. A wireless communication method, characterized in that: include: The second wireless communication device communicates with the first wireless communication device via the sidelink interface; The second wireless communication device receives at least one of a beam measurement configuration or a beam reference signal RS from the first wireless communication device through the sidelink interface; The second wireless communication device measures the beam RS using the beam measurement configuration; The second wireless communication device transmits beam measurement results to the first wireless communication device via the sidelink interface.

17. The method according to claim 16, characterized in that The beam measurement configuration includes at least one of the following: Beam RS measurement threshold; A measurement request indicating whether the second wireless communication device is to report the beam measurement result; a delay bound on the beam measurement result; an indication indicating the presence of the beam RS; Instructing the second wireless communication device receiving the beam measurement configuration to measure the beam RS; An instruction to instruct a second wireless communication device that receives the beam measurement configuration to report the beam measurement result to the first wireless communication device.

18. The method according to claim 16, characterized in that The second wireless communication device transmits the beam measurement result in response to at least one of: Determining that the beam measurement result is lower than a beam RS measurement threshold; determining a beam failure of a beam in the sidelink interface; Determine to send the beam measurement result according to periodicity; A first message is received from the first wireless communication device, the first message comprising at least one of a sidelink signaling radio bearer SL-SRB message, a direct communication request DCR message, a DCR response message, or a discovery message.

19. The method according to claim 16, characterized in that The beam measurement result includes at least one of the following: The measurement value of the beam RS; Recommended beams for communication; Preferred beams for communications; Non-preferred beams for communication; candidate beams for communication; An identifier ID of the beam measurement configuration; A time slot index of a time slot of the beam RS; The time slot number of the time slot of the beam RS; The ID of the beam RS; Beam index; an ID of the candidate beam RS recommended by the second wireless communication; An ID of a beam RS having a best measurement value among multiple beam RSs; The time slot index of the time slot of the beam RS.

20. The method according to claim 19, characterized in that The measured value is at least one of the following: RSRP value; CSI value; A measurement value above the beam RS measurement threshold.

21. The method according to claim 19, characterized in that The recommended beam, the preferred beam, the non-preferred beam, or the candidate beam is identified by at least one of the following: the ID of the beam measurement configuration; The ID of the beam RS; The beam index.

22. A wireless communication device, characterized in that: include: At least one processor and a memory, wherein the at least one processor is configured to read the code from the memory and implement the method according to claim 16.

23. A computer program product, characterized in that include: Computer readable program medium code stored thereon, which, when executed by at least one processor, causes the at least one processor to implement the method according to claim 16.

24. A wireless communication method, characterized in that: include: The first wireless communication device communicates with the second wireless communication device via a sidelink interface; The first wireless communication device determines that a beam fails on the sidelink interface.

25. The method according to claim 24, characterized in that In response to determining that the beam fails, the first wireless communication device performs at least one of the following: Start the beam recovery process; sending a beam indication signal indicating that a beam failure has been detected; Transmit beam measurement configuration; Start the beam measurement process; Trigger resource reselection; Triggers resource pool reselection.

26. The method according to claim 25, characterized in that The beam recovery process includes at least one of the following: The first wireless communication device sends a beam recovery signal to the second communication device via the sidelink interface; Start the beam recovery timer; A beam recovery response signal received from the second wireless communication device is received.

27. The method according to claim 24, characterized in that The first wireless communication device determines the beam failure in response to at least one of: determining that the number of beam failure indications from the physical layer has reached a maximum number of beam failure indications; determining that the number of the beam failure indications from the physical layer exceeds the maximum number of beam failure indications; Receive beam recovery signaling; Determining that the number of consecutive missing physical sidelink feedback channels PSFCH reaches a threshold; receiving an indication from a sidelink RLC entity that a maximum number of retransmissions to a particular destination has been reached; Confirm that the T400 for a specific destination has expired; receiving an indication from a MAC entity that a maximum number of consecutive HARQ DTXs for the particular destination has been reached; receiving an integrity check failure indication for a specific destination from a sidelink PDCP entity; A beam indication signal is received indicating that a beam failure has been detected.

28. The method according to claim 24, characterized in that Also includes: In response to detecting the beam failure, the first wireless communication device sends at least one of the following to a network: detecting an indication of said beam failure; The destination layer 2 identifier ID of the beam where the beam failure was detected.

29. The method according to claim 25, characterized in that Also includes: The first wireless communication device determines that the beam recovery process has failed in response to at least one of: The number of beam recovery signal transmissions reaches the maximum number of beam recovery signal transmissions; The beam measurement result is lower than the beam RS measurement threshold; the first wireless communication device not receiving the beam recovery response signal from the second wireless communication device; The beam recovery timer expires.

30. The method according to claim 26, characterized in that Also includes: The first wireless communication device determines that the beam recovery process is complete or successful in response to at least one of the following: The beam measurement result is higher than the beam RS measurement threshold; starting a beam failure detection timer after receiving the beam failure indication from the physical layer; receiving the beam recovery response signal from the second wireless communication device; receiving the beam recovery response signal from the second wireless communication device and the beam recovery timer is running; The sidelink BWP has been reconfigured; The sidelink resource pool has been reconfigured; The beam measurement configuration has been reconfigured.

31. The method according to claim 26, characterized in that Also includes at least one of the following: The beam recovery signal includes at least one of a beam measurement configuration, a beam measurement result, and an indication of a detected beam failure; or The beam recovery response signal includes at least one of a beam measurement result, a HARQ feedback, and a new sidelink transmission identified by sidelink control information SCI.

32. The method according to claim 24, characterized in that Also includes: In response to determining that the beam recovery process has failed, the first wireless communication device determines that a radio link failure RLF is detected.

33. A wireless communication device, characterized in that: include: At least one processor and a memory, wherein the at least one processor is configured to read the code from the memory and implement the method according to claim 24.

34. A computer program product, characterized in that include: Computer readable program medium code stored thereon, which, when executed by at least one processor, causes the at least one processor to implement the method according to claim 24.

35. A wireless communication method, characterized in that: include: The second wireless communication device communicates with the first wireless communication device via the sidelink interface; The second wireless communication device receives a beam recovery signal from the first wireless communication device via the sidelink interface; The second wireless communication device sends a beam recovery response signal to the first wireless communication device through the sidelink interface.

36. The method according to claim 35, characterized in that Also includes: The second wireless communication device determines a beam failure on the sidelink interface; The second wireless communication device transmits a beam failure indication signal to the first wireless communication device, wherein the first wireless communication device performs a beam recovery process in response to receiving the beam failure indication signal.

37. The method according to claim 36, characterized in that The beam failure indication signal includes at least one of the following: Beam measurement results; An indication of beam failure is detected.

38. A wireless communication device, characterized in that: include: At least one processor and a memory, wherein the at least one processor is configured to read the code from the memory and implement the method according to claim 35.

39. A computer program product, characterized in that include: Computer readable program medium code stored thereon, which, when executed by at least one processor, causes the at least one processor to implement the method according to claim 35.

Images