Wireless communication method and apparatus, device, chip, and storage medium

Abstract

A wireless communication method and apparatus, a device, a chip, and a storage medium, relating to the technical field of communications. The method comprises: after sending a first message, a terminal device receives a second message on the basis of a first RNTI, the first RNTI being determined on the basis of a transmission resource of the first message (610). The terminal device determines the first RNTI on the basis of the transmission resource of the first message, and after sending the first message, receives the second message on the basis of the determined first RNTI, such that the terminal device only needs to use one RNTI to monitor responses from a network device at a given time without needing to simultaneously monitor PDCCHs scrambled by a plurality of RNTIs, thereby reducing the implementation complexity and power consumption of the terminal device.

Description

Wireless communication methods, devices, equipment, chips and storage media Technical Field

[0001] This application relates to the field of communication technology, and in particular to a wireless communication method, apparatus, device, chip, and storage medium. Background Technology

[0002] EDT (Early Data Transmission) technology saves device power consumption by transmitting data during random access.

[0003] To reduce uplink and downlink signaling overhead and improve system uplink capacity, it is planned to further enhance EDT features, such as introducing CB-Msg3 EDT (contention-based-msg3 EDT), which is contention-based direct transmission of Msg3. This scheme transmits Msg3 directly without going through the Msg1 / Msg2 process.

[0004] Currently, further research is needed on how to reduce the implementation complexity of terminal devices and / or network devices for EDT. Summary of the Invention

[0005] This application provides a wireless communication method, apparatus, device, chip, and storage medium. The technical solutions provided by this application are as follows.

[0006] According to one aspect of the embodiments of this application, a wireless communication method is provided, the method being executed by a terminal device, the method comprising:

[0007] After sending the first message, a second message is received based on the first RNTI (Radio Network Temporary Identifier), wherein the first RNTI is determined based on the transmission resources of the first message.

[0008] According to one aspect of the embodiments of this application, a wireless communication method is provided, the method being executed by a terminal device, the method comprising:

[0009] Within the first time window, N first messages are sent based on DSA, where N is an integer greater than 1;

[0010] For the i-th first message among the N first messages, the i-th first message includes:

[0011] The first information corresponding to each of the N first messages; or...

[0012] Among the N first messages, the remaining N-1 first messages, excluding the i-th first message, correspond to the first information respectively;

[0013] Among them, the first information corresponding to the kth first message in the N first messages is related to the transmission resources of the kth first message, and i and k are both positive integers less than or equal to N.

[0014] According to one aspect of the embodiments of this application, a wireless communication method is provided, the method being performed by a network device, the method comprising:

[0015] After receiving the first message from the terminal device, a second message is sent based on the first RNTI, wherein the first RNTI is determined based on the transmission resources of the first message.

[0016] According to one aspect of the embodiments of this application, a wireless communication method is provided, the method being performed by a network device, the method comprising:

[0017] Within the first time window, receive N first messages sent by the receiving terminal device based on DSA, where N is an integer greater than 1;

[0018] For the i-th first message among the N first messages, the i-th first message includes:

[0019] The first information corresponding to each of the N first messages; or...

[0020] Among the N first messages, the remaining N-1 first messages, excluding the i-th first message, correspond to the first information respectively;

[0021] Among them, the first information corresponding to the kth first message in the N first messages is related to the transmission resources of the kth first message, and i and k are both positive integers less than or equal to N.

[0022] According to one aspect of the embodiments of this application, a wireless communication device is provided, the device comprising:

[0023] The transceiver module is used to receive a second message based on a first RNTI after sending a first message, wherein the first RNTI is determined based on the transmission resources of the first message.

[0024] According to one aspect of the embodiments of this application, a wireless communication device is provided, the device comprising:

[0025] The transceiver module is used to send N first messages based on DSA within the first time window, where N is an integer greater than 1;

[0026] For the i-th first message among the N first messages, the i-th first message includes:

[0027] The first information corresponding to each of the N first messages; or...

[0028] Among the N first messages, the remaining N-1 first messages, excluding the i-th first message, correspond to the first information respectively;

[0029] Among them, the first information corresponding to the kth first message in the N first messages is related to the transmission resources of the kth first message, and i and k are both positive integers less than or equal to N.

[0030] According to one aspect of the embodiments of this application, a wireless communication device is provided, the device comprising:

[0031] The transceiver module is used to send a second message based on a first RNTI after receiving a first message sent by a terminal device, wherein the first RNTI is determined based on the transmission resources of the first message.

[0032] According to one aspect of the embodiments of this application, a wireless communication device is provided, the device comprising:

[0033] The transceiver module is used to receive N first messages sent by the terminal device based on DSA within the first time window, where N is an integer greater than 1;

[0034] For the i-th first message among the N first messages, the i-th first message includes:

[0035] The first information corresponding to each of the N first messages; or...

[0036] Among the N first messages, the remaining N-1 first messages, excluding the i-th first message, correspond to the first information respectively;

[0037] Among them, the first information corresponding to the kth first message in the N first messages is related to the transmission resources of the kth first message, and i and k are both positive integers less than or equal to N.

[0038] According to one aspect of the embodiments of this application, a communication device is provided, the communication device including a processor and a memory, the memory storing a computer program, the processor executing the computer program to implement the wireless communication method on the terminal device side or the wireless communication method on the network device side.

[0039] According to one aspect of the embodiments of this application, a computer-readable storage medium is provided, the storage medium storing a computer program, the computer program being executed by a processor to implement the wireless communication method on the terminal device side or the wireless communication method on the network device side described above.

[0040] According to one aspect of the embodiments of this application, a chip is provided, the chip including programmable logic circuits and / or program instructions, which, when the chip is running, are used to implement the wireless communication method on the terminal device side or the wireless communication method on the network device side.

[0041] According to one aspect of the embodiments of this application, a computer program product is provided, the computer program product including computer instructions stored in a computer-readable storage medium, wherein a processor reads from the computer-readable storage medium and executes the computer instructions to implement the wireless communication method on the terminal device side or the wireless communication method on the network device side described above.

[0042] The technical solutions provided in this application embodiment may have the following beneficial effects:

[0043] By determining the first RNTI based on the transmission resources of the first message by the terminal device, and receiving the second message based on the determined first RNTI after sending the first message, the terminal device only needs to use one RNTI to listen to the response from the network device at any given time, without having to listen to the PDCCH scrambled by multiple RNTIs at the same time, thereby reducing the terminal implementation complexity and terminal power consumption.

[0044] For DSA-based EDT transmission, the terminal device carries the first information in the first message it sends, so that the network device knows the RNTI used by the terminal device to listen to the network device's response at each moment. At the same time, it can effectively avoid the network device repeatedly responding to different copies of the first message of the same terminal device, which can reduce the implementation complexity of the network device and effectively save system resources. Attached Figure Description

[0045] Figure 1 is a schematic diagram of a network architecture provided in one embodiment of this application;

[0046] Figure 2 is a schematic diagram of a contention-based random access method provided in an embodiment of this application;

[0047] Figure 3 is a schematic diagram of a non-contention-based random access method provided in an embodiment of this application;

[0048] Figure 4 is a flowchart of the EDT under the user plane transport scheme provided in an embodiment of this application;

[0049] Figure 5 is a schematic diagram of a terminal device listening to the PDCCH in a DSA scenario provided by an embodiment of this application;

[0050] Figure 6 is a flowchart of a wireless communication method provided in an embodiment of this application;

[0051] Figure 7 is a flowchart of a wireless communication method provided in another embodiment of this application;

[0052] Figure 8 is a schematic diagram of a terminal device listening to the PDCCH in a DSA scenario provided by another embodiment of this application;

[0053] Figure 9 is a flowchart of a wireless communication method provided in another embodiment of this application;

[0054] Figure 10 is a flowchart of a wireless communication method provided in another embodiment of this application;

[0055] Figure 11 is a block diagram of a wireless communication device provided in an embodiment of this application;

[0056] Figure 12 is a block diagram of a wireless communication device provided in another embodiment of this application;

[0057] Figure 13 is a schematic diagram of the structure of a terminal device provided in an embodiment of this application;

[0058] Figure 14 is a schematic diagram of the structure of a network device provided in one embodiment of this application. Detailed Implementation

[0059] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0060] The network architecture and business scenarios described in the embodiments of this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided in the embodiments of this application. As those skilled in the art will know, with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

[0061] The technical solutions of this application embodiment can be applied to various communication systems, such as: Global System for Mobile Communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) system, New Radio (NR) system, evolution of NR system, LTE-based access to unlicensed spectrum (LTE-U) system, NR-based access to unlicensed spectrum (NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), and Wireless Fidelity (WF). Fidelity (WiFi), 5th-Generation (5G) systems, B5G (Beyound 5G) systems, 6th-Generation (6G) systems, or other communication systems.

[0062] Traditional communication systems typically support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communication but also, for example, device-to-device (D2D) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), vehicle-to-vehicle (V2V) communication, or vehicle-to-everything (V2X) communication. The embodiments of this application can also be applied to these communication systems.

[0063] The communication system in this application embodiment can be applied to carrier aggregation (CA) scenarios, dual connectivity (DC) scenarios, and standalone (SA) network deployment scenarios.

[0064] The communication system in this application embodiment can be applied to unlicensed spectrum, wherein unlicensed spectrum can also be considered as shared spectrum; or, the communication system in this application embodiment can also be applied to licensed spectrum, wherein licensed spectrum can also be considered as non-shared spectrum.

[0065] The embodiments of this application can be applied to both non-terrestrial networks (NTN) and terrestrial networks (TN). NTN typically uses satellite communication to provide communication services to terrestrial users. Currently, NTN systems include NR-NTN and IoT-NTN systems, and other NTN systems may be included in the future.

[0066] Please refer to Figure 1, which shows a schematic diagram of a network architecture 100 provided in one embodiment of this application. The network architecture 100 may include: a terminal device 10, an access network device 20, and a core network element 30.

[0067] Terminal device 10 can refer to UE (User Equipment), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, wireless communication device, user agent, or user equipment. In some embodiments, terminal device 10 can also be a cellular phone, cordless phone, SIP (Session Initiation Protocol) phone, WLL (Wireless Local Loop) station, PDA (Personal Digital Assistant), handheld device with wireless communication capabilities, computing device or other processing device connected to a wireless modem, vehicle-mounted device, wearable device, terminal device in 5GS (5th Generation System), or terminal device in the future evolved PLMN (Public Land Mobile Network), etc., and this application embodiment is not limited thereto. For ease of description, the devices mentioned above are collectively referred to as terminal devices. The number of terminal devices 10 is usually multiple, and one or more terminal devices 10 can be distributed within the cell managed by each access network device 20. Terminal equipment can also be simply referred to as terminal or UE, the meaning of which can be understood by those skilled in the art.

[0068] Access network device 20 is a device deployed in an access network to provide wireless communication functionality to terminal device 10. Access network device 20 may include various forms of macro base stations, micro base stations, relay stations, access points, etc. In systems employing different wireless access technologies, the name of the device with access network device functionality may differ; for example, in a 5G NR system, it is called gNodeB or gNB. As communication technologies evolve, the name "access network device" may change. For ease of description, in this embodiment, the aforementioned devices providing wireless communication functionality to terminal device 10 are collectively referred to as access network devices. In some embodiments, a communication relationship can be established between terminal device 10 and core network element 30 through access network device 20. For example, in an LTE (Long Term Evolution) system, access network device 20 may be one or more eNodeBs in an EUTRAN (Evolved Universal Terrestrial Radio Access Network) or EUTRAN; in a 5G NR system, access network device 20 may be one or more gNBs in a RAN (Radio Access Network). In the embodiments of this application, unless otherwise specified, the term "network device" refers to access network device 20, such as a base station.

[0069] Core network element 30 is a network element deployed in the core network. Its main functions are to provide user connectivity, manage users, and bear services, serving as an interface to external networks. For example, core network elements in a 5G NR system may include AMF (Access and Mobility Management Function) entities, UPF (User Plane Function) entities, and SMF (Session Management Function) entities.

[0070] In some embodiments, the access network device 20 and the core network element 30 communicate with each other via some air interface technology, such as the NG interface in a 5G NR system. The access network device 20 and the terminal device 10 communicate with each other via some air interface technology, such as the Uu interface.

[0071] The "5G NR system" in this application embodiment can also be referred to as a 5G system or an NR system, but those skilled in the art will understand its meaning. The technical solutions described in this application embodiment can be applied to LTE systems, 5G NR systems, and subsequent evolution systems of 5G NR systems (such as B5G (Beyond 5G, a fifth-generation mobile communication technology) systems, 6G systems (6th Generation System, a sixth-generation mobile communication system)), and other communication systems such as NB-IoT (Narrow Band Internet of Things) systems. This application does not limit these applications.

[0072] In this embodiment, the network device can provide services to a cell. The terminal device communicates with the network device through the transmission resources (e.g., frequency domain resources, or spectrum resources) on the carrier used by the cell. The cell can be the cell corresponding to the network device (e.g., a base station). The cell can belong to a macro base station or to a base station corresponding to a small cell. The small cell can include: metro cell, micro cell, pico cell, femto cell, etc. These small cells have the characteristics of small coverage area and low transmission power, and are suitable for providing high-speed data transmission services.

[0073] Before introducing the technical solution of this application, some related technical knowledge involved in this application will be introduced and explained. The following related technologies are optional solutions and can be arbitrarily combined with the technical solutions of the embodiments of this application, all of which fall within the protection scope of the embodiments of this application. The embodiments of this application include at least some of the following contents.

[0074] 1. LTE Random Access Procedure

[0075] In LTE, the random access process is mainly triggered by the following events:

[0076] 1. Establishing a radio connection during initial UE access: The UE transitions from the RRC (Radio Resource Control)_IDLE state (idle state) to the RRC_CONNECTED state (connected state);

[0077] 2. RRC connection reconstruction process: to enable the UE to rebuild the radio connection after the radio link fails;

[0078] 3. Handover: The UE needs to establish uplink synchronization with the new cell;

[0079] 4. In the RRC_CONNECTED state, DL (DownLink) data arrives, and UL is out of sync at this time;

[0080] 5. In the RRC_CONNECTED state, UL (UpLink) data arrives. At this time, the UL is out of sync or there is no PUCCH resource for sending SR.

[0081] 6. SR failed;

[0082] 7. Synchronous reconfiguration request from RRC.

[0083] In LTE, two main random access methods are supported: contention-based random access and contention-free random access. These two methods are applicable to different scenarios. In contention-based random access, the RACH (Random Access Channel) is a resource pool available to the terminal device, and different terminal devices can use the same resources, leading to resource contention. In contention-free random access, specific resources are reserved and allocated to a specific terminal device at a given time.

[0084] Figure 2 illustrates a contention-based random access method, characterized by code resource sharing and a four-step access process, including access request, access response, connection request, and contention resolution (also known as conflict resolution). This process comprises steps Step 1 through Step 4. It is important to note that the interaction messages in each step of the contention-based random access method are referred to as Msg1 through Msg4.

[0085] Step 1: Access Request (Msg1)

[0086] The terminal device selects a PRACH (Physical Random Access Channel) resource (including time-frequency resources and code domain resources) and transmits the selected preamble on the selected PRACH time-frequency resource. Based on the preamble, the network device can estimate the uplink timing and the grant size required for the terminal device to transmit Msg3.

[0087] Step 2: Access Response (Msg2)

[0088] After receiving the preamble from the terminal device, the network device sends a RAR (Random Access Response) to the terminal device. After sending Msg1, the terminal device opens a RAR window and monitors the PDCCH (Physical Downlink Control Channel) scrambled with RA-RNTI (Random Access-Radio Network Temporary Identifier).

[0089] In LTE systems, RA-RNTI is calculated as follows:

[0090] RA-RNTI = 1 + t_id + 10 * f_id

[0091] Where t_id is the index of the first subframe of PRACH transmission (0≤t_id<10), and f_id is the frequency domain index of the corresponding PRACH in that subframe (0≤f_id<6). The PRACH resources are numbered sequentially in the frequency domain from low to high.

[0092] In the NR system, RA-RNTI is calculated as follows:

[0093] RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id

[0094] Wherein, s_id is the index of the first OFDM (Orthogonal Frequency Division Multiplexing) symbol of the PRACH timing (0≤s_id≤14), t_id is the index of the first slot of the PRACH timing in the system frame (0≤t_id≤80), f_id is the index of the PRACH timing in the frequency domain (0≤f_id≤8), and ul_carrier_id is the UL (Uplink) carrier used for random access preamble transmission (0 indicates NUL (Normal Uplink) carrier, and 1 indicates SUL (Supplementary Uplink) carrier).

[0095] For eMTC (enhanced Machine-Type Communication) UEs, RA-RNTI is calculated as follows:

[0096] RA-RNTI=1+t_id+10*f_id+60*(SFN_id mod(Wmax / 10))

[0097] Where t_id is the index of the first subframe of PRACH transmission (0≤t_id<10), f_id is the frequency domain index of the corresponding PRACH in that subframe (0≤f_id<6), and PRACH resources are numbered sequentially in the frequency domain from low to high. SFN_id is the index of the first SFN (system frame) of PRACH transmission, and Wmax is the maximum RAR window length supported by eMTC, which is 400 subframes.

[0098] For NB-IoT UEs, RA-RNTI is calculated as follows:

[0099] RA-RNTI=1+floor(SFN_id / 4)+256*carrier_id

[0100] Here, SFN_id is the index of the first SFN transmitted via PRACH, and carrier_id is the index of the UL carrier corresponding to the PRACH transmission. The carrier_id corresponding to the Anchor carrier is 0.

[0101] For NB-IoT UEs in TDD (Time Division Duplexing) mode, RA-RNTI is calculated as follows:

[0102] RA-RNTI=1+floor(SFN_id / 4)+256*(H-SFN mod 2)

[0103] Wherein, SFN_id is the index of the first SFN transmitted by PRACH, and H-SFN is the index of the first H-SFN (superframe) transmitted by PRACH.

[0104] As can be seen from the calculation formula of RA-RNTI above, RA-RNTI is related to the PRACH time and frequency resources used by the terminal device to send Msg1.

[0105] After the terminal device successfully receives the RA-RNTI scrambled PDCCH, it can obtain the PDSCH (Physical Downlink Shared Channel) scheduled by the PDCCH, which contains RAR.

[0106] The RAR subheader contains a BI (Backoff Indicator), which indicates the backoff time for retransmitting Msg1.

[0107] The RAR subheader also contains RAPID (Random Access Preamble ID), which indicates the preamble index received by the network.

[0108] The RAR payload contains a TAC (Timing Advance Command), which is used to adjust the uplink timing.

[0109] The RAR payload also includes a UL grant (uplink grant), used to indicate or schedule uplink resources for the Msg3 transmission. Because the terminal device has not yet established an RRC connection with the network device or performed uplink synchronization, it cannot request uplink grants from the network device for uplink transmission via a Scheduling Request. Instead, it can only send the first uplink message, Msg3 (RRC Setup Request), by including uplink grant information in the RAR message. The UL-Grant field indicates the resources used for uplink transmission. The UL-Grant field is 20 bits long, and Msg3 is actually sent using these resources.

[0110] The RAR payload also includes Temporary C-RNTI, or TC-RNTI (Temporary Cell-RNTI, Temporary Cell-Radio Network Temporary Identifier), which is used to scramble Msg4's PDCCH.

[0111] If the terminal device receives a RA-RNTI scrambled PDCCH and the RAR contains its own preamble index, the terminal considers it to have successfully received the random access response.

[0112] For non-contention-based random access, the random access process ends after the terminal successfully receives Msg2. For contention-based random access, after the terminal device successfully receives Msg2, it still needs to transmit Msg3 and receive Msg4.

[0113] Step 3: Connection Request (Msg3)

[0114] Msg3 is primarily used to inform network devices what event triggered the RACH procedure. For example, if it's an initial access random procedure, Msg3 will carry the UE ID (such as S-TMSI, randomValue) and establishment cause; if it's an RRC reconstruction, it will carry the connected-state UE identifier (such as C-RNTI, PCI, shortMAC-I) and reestablishment cause. Simultaneously, the ID carried in Msg3 allows contention to be resolved in Step 4.

[0115] Step 4: Competition Resolution (Msg4)

[0116] Msg4 has two functions: first, it is used for contention resolution, and second, it is used to transmit RRC configuration messages to the terminal device.

[0117] There are two ways to resolve contention: Method 1: If the terminal device carries a C-RNTI in Msg3, then Msg4 is scheduled using a PDCCH scrambled with the C-RNTI. Method 2: If the terminal device does not carry a C-RNTI in Msg3, such as during initial access, then Msg4 is scheduled using a PDCCH scrambled with the TC-RNTI. Conflict resolution is achieved by the terminal device receiving the PDSCH carrying Msg4 and matching the CCCH (Common Control Channel) SDU (Service Data Unit) in the PDSCH with the contention resolution ID in its own Msg3.

[0118] Figure 3 illustrates a non-contention-based random access method, characterized by exclusive code resources and a three-step access process: preamble allocation, access request, and access response. This process includes the following steps: Step 0 to Step 2. It's important to note that the interaction messages in each step of this non-contention-based random access method are referred to as Msg0 to Msg2, respectively.

[0119] Step 0: Leader assignment (Msg0)

[0120] Network devices assign random access preambles to terminal devices and send them using RRC messages or DCI (Downlink Control Information).

[0121] Step 1: Access Request (Msg1)

[0122] Step 2: Access Response (Msg2)

[0123] For explanations of Msg1 and Msg2, please refer to the above text; they will not be repeated here.

[0124] As can be seen from the above random access process, the main purpose of random access is for the terminal device to achieve uplink synchronization with the cell. During the random access process, the network device can know the time when the terminal device sends the preamble based on the RACH time-frequency resources used by the preamble received from the terminal device. Therefore, it determines the initial TA (Timing Advance) of the terminal device based on the transmission and reception times of the preamble, and informs the terminal through the RAR.

[0125] 2. EDT (Early Data Transmission)

[0126] In traditional LTE systems, if a terminal device in RRC IDLE state needs to transmit uplink data, it must first initiate an RRC connection establishment process through a random access procedure. Only after establishing an RRC connection with the network device can it transmit data. To reduce signaling interactions between the terminal device and the network device during data transmission and to save terminal power consumption, the EDT mechanism is introduced for NB-IoT and eMTC. This feature allows a terminal device in RRC IDLE state to transmit UL data via Msg3 during the random access procedure. Upon receiving a successful reception response from the network device, the random access procedure terminates, and the terminal device remains in RRC IDLE state without entering RRC connected state. The network device configures a separate PRACH resource for EDT. When the amount of UL data to be transmitted by the terminal device does not exceed the data limit configured by the network device, the terminal device can send Msg1 on the separate PRACH resource for EDT to request Msg3 authorization from the network device for EDT. Figure 4.400 shows the flowchart of EDT under the user plane transport scheme. In Figure 4, MME refers to Mobility Management Entity and S-GW refers to Serving Gateway.

[0127] 3. PUR (Preconfigured Uplink Resources)

[0128] To further reduce signaling overhead and terminal power consumption on top of EDT, the PUR feature was introduced for NB-IoT and eMTC. This feature allows the base station to configure PUR resources for the UE while releasing it to RRC IDLE state. The UE can then use these PUR resources for uplink transmission in RRC IDLE state without initiating a random access procedure. When configuring the PUR for the UE, the network can also simultaneously configure a DMRS (Demodulation Reference Signal) cyclic shift, allowing up to two UEs to share the same PUSCH (Physical Uplink Shared Channel) resource (distinguished by the DMRS). By skipping the random access procedure, uplink transmission efficiency and terminal power consumption can be further improved.

[0129] Before performing a PUR transmission, the UE needs to verify the validity of the TA. The validity of the TA is determined based on one or more of the following conditions:

[0130] a) Has the service area changed?

[0131] b) Has the TAT timed out?

[0132] c) Changes in UE RSRP (Reference Signal Receiving Power).

[0133] To reduce uplink and downlink signaling overhead and improve system uplink capacity, IoT NTN plans to further enhance EDT features, such as introducing RACH-less EDT, i.e., direct transmission of Msg3, which transmits Msg3 directly without going through the Msg1 / Msg2 process. The research objectives for this feature are as follows: Study and specify, if beneficial, the following enhancements to reduce the necessary uplink and downlink signaling to complete an EDT transaction [RAN2]: Msg3 transmission without msg1 / RAR; Efficient delivery (reduced overhead) of msg4 / RRC early Data Complete.

[0134] In traditional EDT, the base station allocates PUSCH resources for the initial transmission of Msg3 to the UE via Msg2. In traditional PUR (Preconfigured UL resources), the base station provides PUR configuration information to the UE via an RRC connection release message when releasing the UE to the RRC IDLE state. Regarding PUSCH resources used for Msg3 transmission in RACH-less EDT, RAN2#126 reached the following conclusion: RAN2 focuses the study on contention-based Msg3 transmission to complete an EDT-like transaction (FFS on the details of Msg3, FFS on the procedural steps, e.g., how much we reuse of EDT and PUR procedures, FFS on resource allocation).

[0135] Based on the above conclusions, in RACH-less EDT, if multiple UEs select the same PUSCH resource to transmit Msg3 (i.e., multiple UEs experience Msg3 conflict), the base station can only successfully receive Msg3 from one UE at most. However, in most cases, the base station cannot correctly receive Msg3 from all these conflicting UEs. Thus, UEs that fail to resolve contention need to retry Msg3 transmission. Similarly, for CBRA (contention-based Random Access), for UEs that select the same RO (RACH Occasion) and the same preamble to send Msg1, the success of contention resolution can only be determined after Msg4 is received. UEs that fail to resolve contention need to retry Msg1. Msg3 conflicts in RACH-less EDT and Msg1 conflicts in CBRA waste system PUSCH and PRACH resources and increase the latency for UE data transmission or access, thus affecting user experience.

[0136] Therefore, in order to further improve the system capacity, the following two features have been agreed upon after discussion:

[0137] (1) DSA technology

[0138] In some current satellite communication standards, DSA (Diversity Slotted Aloha) or CRDSA (Contention Resolution Diversity Slotted Aloha) are used to effectively improve the utilization of random access resources and reduce the probability of collisions between different UEs for random access. Taking RACH-less EDT as an example, the basic idea of ​​DSA is that the UE sends multiple Msg3 replicas using different Msg3 transmissions. As long as the base station can successfully receive one of the Msg3s, the UE can consider the EDT to be successful. Therefore, DSA increases the probability of the UE's Msg3 being successfully received by the base station by increasing the opportunities for Msg3 transmission, thereby improving system capacity.

[0139] (2) OCC (Orthogonal Cover Code) technology

[0140] Taking CB-Msg3 based EDT (Contention Based-Msg3 based EDT) as an example, OCC technology is used during Msg3PUSCH transmission, enabling multiple UEs to reuse the same PUSCH time domain resources for transmission, and different UEs are distinguished by OCC.

[0141] For CB-Msg3 based EDT, the RNTI used by the terminal device to listen for the network device's response (such as a PDCCH indicating Msg4 reception or Msg3 retransmission) after sending Msg3 is determined based on the resources used for Msg3 transmission. Compared to SA-based CB-Msg3 based EDT, DSA-based CB-Msg3 based EDT requires the terminal device to send multiple Msg3 copies before receiving the network device's response. Thus, the terminal device can determine an RNTI for each Msg3 copy, as shown in Figure 5, where the terminal device obtains RNTIs x, y, and z based on the resources used for transmitting Msg3 copies 1, 2, and 3, respectively. On the one hand, the terminal device needs to listen for multiple RNTI-scrambled PDCCHs after sending multiple Msg3 copies; on the other hand, the network device may repeatedly respond to different Msg3 copy transmissions from the same terminal device. How to reduce the number of RNTIs used by the terminal device to listen for PDCCHs, thereby reducing the implementation complexity and power consumption of the terminal device, while enabling the network device to effectively avoid repeatedly responding to different Msg3 copy transmissions from the same terminal device, is a problem that needs to be solved.

[0142] Please refer to Figure 6, which shows a flowchart of a wireless communication method provided in one embodiment of this application. This method can be applied to the network architecture shown in Figure 1. The method may include the following step 610.

[0143] Step 610: After sending the first message, the terminal device receives the second message based on the first RNTI, wherein the first RNTI is determined based on the transmission resources of the first message.

[0144] In some embodiments, after receiving a first message from a terminal device, the network device sends a second message based on a first RNTI.

[0145] In some embodiments, the first message is Msg3 and the second message is Msg4. Optionally, for a traditional EDT, the first message is Msg3 and the second message is Msg4. Optionally, for a CB-msg3 based EDT, the first message is CB-Msg3 and the second message is Msg4.

[0146] Optionally, when the terminal device uses DSA technology to send the first message, the terminal device may send multiple first messages, which are also referred to as multiple copies of the first message. For example, when the terminal device uses DSA technology to send CB-Msg3, the terminal device may send multiple identical CB-Msg3s, which are also referred to as multiple copies of CB-Msg3.

[0147] Optionally, the first message carries uplink data. For example, for a traditional EDT, the first message is Msg3, and Msg3 carries the uplink data of the EDT. For example, for a CB-Msg3 based EDT, the first message is CB-Msg3, and CB-Msg3 carries the uplink data of the EDT.

[0148] In some embodiments, the transmission resources of the first message refer to the transmission resources used by the terminal device to send the first message. The transmission resources include at least one of the following: time-domain resources, frequency-domain resources, and code-domain resources. The time-domain resources may be subframes, SFNs, H-SFNs, etc. The frequency-domain resources may be subcarriers, carriers, PRBs (Physical Resource Blocks), etc. The code-domain resources may be OCCs.

[0149] In some embodiments, the first RNTI is used to receive the first PDCCH and / or the first PDSCH, the first PDCCH is used to schedule the reception of the second message, and the first PDSCH is used to carry the second message. Wherein, the first RNTI is used to receive the first PDCCH, which can be understood as the first PDCCH being scrambled using the first RNTI; the network device scrambles the first PDCCH using the first RNTI when sending it, and the terminal device descrambles it using the first RNTI when receiving it. The first RNTI is also used to receive the first PDSCH, which can be understood as the first PDSCH being scrambled using the first RNTI; the network device scrambles the first PDSCH using the first RNTI when sending it, and the terminal device descrambles it using the first RNTI when receiving it.

[0150] When the first RNTI is used to receive the first PDCCH, the network device sends the first PDCCH based on the first RNTI. The above step 610 is: after the terminal device sends the first message, it receives the first PDCCH based on the first RNTI. The first PDCCH is used to schedule the reception of the second message.

[0151] When the first RNTI is used to receive the first PDSCH, the network device sends the first PDSCH based on the first RNTI. The above step 610 is: after the terminal device sends the first message, it receives the first PDSCH based on the first RNTI. The first PDSCH is used to carry the second message.

[0152] When the first RNTI is used to receive the first PDCCH and the first PDSCH, the network device sends the first PDCCH and the first PDSCH based on the first RNTI. The above step 610 is as follows: the terminal device receives the first PDCCH based on the first RNTI, and the first PDCCH is used to schedule the reception of the second message; the terminal device receives the first PDSCH based on the first RNTI, and the first PDSCH is used to carry the second message.

[0153] In some embodiments, the RNTI used by the terminal device to send the first message is the same as the RNTI used to receive the second message. Exemplarily, both the RNTI used by the terminal device to send the first message and the RNTI used to receive the second message are determined based on the transmission resources of the first message, and are therefore identical.

[0154] In some embodiments, the RNTI used by the terminal device to send the first message is different from the RNTI used to receive the second message. For example, the RNTI used by the terminal device to send the first message is indicated by the network device, while the RNTI used by the terminal device to receive the second message is determined based on the transmission resources of the first message; the two are different.

[0155] In some embodiments, when the terminal device sends N first messages based on DSA, these N first messages occupy different time-domain resources, where N is an integer greater than 1. After sending the i-th first message out of the N first messages, the terminal device receives the second message based on the i-th first RNTI, where the i-th first RNTI is determined based on the transmission resources of the i-th first message, and i is a positive integer less than or equal to N. Specifically, when i is greater than 1, after sending the i-th first message out of the N first messages, the terminal device changes the first RNTI used to receive the second message from the (i-1)-th first RNTI to the i-th first RNTI, and receives the second message based on the i-th first RNTI. It should be understood that when the terminal device changes the first RNTI used to receive the second message from the (i-1)-th first RNTI to the i-th first RNTI, it means that the terminal device no longer uses the (i-1)-th first RNTI to receive the second message, but instead uses the i-th first RNTI to receive the second message. Alternatively, the terminal device no longer uses the (i-1)th first RNTI to receive the first PDCCH and / or the first PDSCH, but instead uses the i-th first RNTI to receive the first PDCCH and / or the first PDSCH.

[0156] Accordingly, for the network device, after receiving the i-th first message out of N first messages sent by the terminal device, the network device sends a second message based on the i-th first RNTI, where the i-th first RNTI is determined based on the transmission resources of the i-th first message. After receiving the i-th first message out of N first messages sent by the terminal device, the network device changes the first RNTI used to send the second message from the (i-1)-th first RNTI to the i-th first RNTI, and sends the second message based on the i-th first RNTI. It should be understood that changing the first RNTI used to send the second message from the (i-1)-th first RNTI to the i-th first RNTI means that the network device no longer uses the (i-1)-th first RNTI to send the second message, but instead uses the i-th first RNTI. In other words, the network device no longer uses the (i-1)-th first RNTI to send the first PDCCH and / or the first PDSCH, but instead uses the i-th first RNTI to send the first PDCCH and / or the first PDSCH.

[0157] In some embodiments, as shown in FIG7, the terminal device receives the second message based on the following steps 710-730.

[0158] Step 710: After sending the first first message out of N first messages, the terminal device starts the first timer.

[0159] Step 720: During the operation of the first timer, the terminal device receives a second message based on the first first RNTI, and the first first RNTI is determined based on the transmission resources of the first first message.

[0160] Step 730: After sending the i-th first message out of N first messages, the terminal device changes the first RNTI used to receive the second message from the (i-1)-th first RNTI to the i-th first RNTI, and receives the second message based on the i-th first RNTI, where i is an integer greater than 1.

[0161] The duration of the first timer defines the maximum duration for which the terminal device listens for responses from the network device. After sending the first first message, the terminal device starts the first timer. During the operation of the first timer, it listens for the first PDCCH scrambled based on the first first RNTI. The first PDCCH is used to indicate the HARQ retransmission of the first message or the reception of the first PDSCH.

[0162] Optionally, the time to start the first timer is the time when the first message is sent.

[0163] Optionally, the first timer is started after a first duration has elapsed since the first message was sent. Exemplarily, the first duration is configured or pre-configured by the network device, specified by a standard, or depends on the implementation of the terminal device. Exemplarily, the first duration is determined based on the round-trip time (RTT) between the terminal device and the network device. Exemplarily, the first duration is determined based on the RTT and processing time between the terminal device and the network device, wherein the processing time is configured or pre-configured by the network device, specified by a standard, or depends on the implementation of the terminal device.

[0164] In some embodiments, step 730 above can be replaced by the following steps: After the terminal device sends the i-th first message out of N first messages, it changes the first RNTI used to receive the second message from the (i-1)-th first RNTI to the i-th first RNTI at a first moment, and receives the second message based on the i-th first RNTI; wherein, the first moment is determined based on the moment when the i-th first message is sent.

[0165] Optionally, the first moment is the moment when the i-th first message is sent.

[0166] Optionally, the first time point is the time elapsed after the completion of the transmission of the i-th first message, followed by a second duration. Exemplarily, the second duration is configured or pre-configured by the network device, specified by a standard, or depends on the implementation of the terminal device. Exemplarily, the second duration is determined based on the round-trip time between the terminal device and the network device. Exemplarily, the second duration is determined based on the round-trip time between the terminal device and the network device and the processing time, wherein the processing time is configured or pre-configured by the network device, specified by a standard, or depends on the implementation of the terminal device.

[0167] Optionally, the first moment refers to the moment when the first timer is started or restarted. Restarting the first timer means that the previously started first timer has not expired at the first moment, or is running, and is restarted; the restarted first timer will then start counting from its set duration again. Starting the first timer means that the previously started first timer has already expired at the first moment, and in this case, the first timer is started.

[0168] Furthermore, the timing for starting or restarting the first timer is similar to that described above, only requiring the replacement of the first first message with the i-th first message. That is, the timing for starting or restarting the first timer is either the moment the i-th first message is sent, or the moment after the i-th first message is sent, after the first duration has elapsed.

[0169] The technical solution of this embodiment will be illustrated below using DSA-based CB-Msg3 EDT transmission as an example. Assume that the terminal device needs to send N copies of Msg3, where N copies correspond to different time-domain resources, and N is an integer greater than 1.

[0170] 1. In this CB-Msg3 based EDT attempt, the terminal device starts a first timer after sending the first Msg3 copy, and listens for the PDCCH scrambled with RNTIx during the first timer's operation. Optionally, the RNTI used by the terminal device to send the first Msg3 copy can be RNTIx or not; this application does not limit this.

[0171] The duration of the first timer is used to define the maximum duration for the terminal device to listen for responses from the network device. The terminal device listens for the RNTI x scrambled PDCCH to indicate Msg3 HARQ retransmission or Msg4 PDSCH reception.

[0172] The timing when the terminal device starts the first timer can be any of the following possible scenarios.

[0173] Case 1: The first timer is started immediately when the terminal device completes the sending of the first Msg3 copy.

[0174] Scenario 2: After the terminal device completes the sending of the first Msg3 copy and starts the first timer after a certain processing time interval, the processing time is either a predefined value or configured by the network device.

[0175] Case 3: The terminal device starts the first timer after completing the first Msg3 copy transmission and after an interval of one UE-gNB RTT (or UE-eNB RTT).

[0176] Case 4: After the terminal device completes the transmission of the first Msg3 copy and starts the first timer after an interval of one UE-gNB RTT (or UE-eNB RTT) duration plus processing time, the processing time is a predefined value or configured by the network device.

[0177] RNTIx is determined based on at least one of the time-domain resources, frequency-domain resources, and code-domain resources used in the transmission of the first Msg3 copy.

[0178] 2. After sending the second Msg3 copy, the terminal device changes the RNTI used for listening to the PDCCH from RNTIx to RNTIy starting at time t1 during the first timer's operation. That is, the terminal device changes from listening to the PDCCH scrambled with RNTIx to listening to the PDCCH scrambled with RNTIy. Optionally, the RNTI used by the terminal device to send the second Msg3 copy can be RNTIy or not; this application does not limit this.

[0179] The method for determining the aforementioned time t1 can be one of the following:

[0180] Method 1: Time t1 is the time when the second Msg3 copy is sent and completed, or the last time unit used for sending the second Msg3 copy, or the first time unit after the second Msg3 copy is sent and completed.

[0181] Method 2: Time t1 is the time after the second Msg3 copy is sent and a certain processing time has elapsed. The processing time is a predefined value or configured by the network device.

[0182] Method 3: Time t1 is the time after the second Msg3 copy is sent and after an interval of one UE-gNB RTT (or UE-eNB RTT).

[0183] Method 4: Time t1 is the time after the second Msg3 copy is sent and after an interval of one UE-gNB RTT (or UE-eNB RTT) duration plus processing time. The processing time is a predefined value or configured by the network device.

[0184] Method 5: Time t1 is the time when the terminal device starts or restarts the first timer after completing the sending of the second Msg3 copy. The method for starting or restarting the first timer is the same as in step 1, except that "complete the sending of the first Msg3 copy" is changed to "complete the sending of the second Msg3 copy".

[0185] 3. After sending the nth Msg3 copy, the terminal device, starting at time t(n-1) during the first timer's operation, changes the RNTI used for monitoring the PDCCH from RNTIj to RNTIk. RNTIj is determined based on at least one of the time-domain resources, frequency-domain resources, and code-domain resources used for the (n-1)th Msg3 copy transmission, and RNTIk is determined based on at least one of the time-domain resources, frequency-domain resources, and code-domain resources used for the nth Msg3 copy transmission. Here, n is greater than 1 and less than or equal to N.

[0186] As shown in Figure 8, for DSA-based CB-Msg3 EDT transmission, after sending Msg3 copy 1, the terminal device uses RNTIx to listen for the network device's response. After sending Msg3 copy 2, the RNTI used to listen for the network device's response is changed from RNTIx to RNTIy, and RNTIy is used to listen for the network device's response. After sending Msg3 copy 3, the RNTI used to listen for the network device's response is changed from RNTIy to RNTIz, and RNTIz is used to listen for the network device's response. RNTIx, RNTIy, and RNTIz are determined based on the time-frequency resources or time-frequency code resources used for transmitting Msg3 copies 1, 2, and 3, respectively. For DSA-based CB-Msg3 EDT transmission, this method allows the terminal device to use only one RNTI to listen for the response from the network device at any given time, without simultaneously listening to multiple RNTI-scrambled PDCCHs, thereby reducing the terminal implementation complexity and power consumption.

[0187] The technical solution provided in this application embodiment determines the first RNTI based on the transmission resources of the first message by the terminal device, and receives the second message based on the determined first RNTI after sending the first message. This allows the terminal device to use only one RNTI to listen to the response from the network device at any given time, without having to listen to the PDCCH scrambled by multiple RNTIs at the same time, thereby reducing the terminal implementation complexity and terminal power consumption.

[0188] Please refer to Figure 9, which shows a flowchart of a wireless communication method provided in another embodiment of this application. This method can be applied to the network architecture shown in Figure 1. The method may include the following step 910.

[0189] Step 910: Within the first time window, the terminal device sends N first messages based on DSA, where N is an integer greater than 1;

[0190] For the i-th first message among N first messages, the i-th first message includes:

[0191] The first information corresponding to each of the N first messages; or...

[0192] Among the N first messages, the remaining N-1 first messages (excluding the i-th first message) correspond to the first information respectively;

[0193] Among them, the first information corresponding to the kth first message in the N first messages is related to the transmission resources of the kth first message, and i and k are both positive integers less than or equal to N.

[0194] In some embodiments, the network device receives N first messages sent by the terminal device based on DSA within a first time window.

[0195] In some embodiments, the first message is Msg3. Optionally, for a conventional EDT, the first message is Msg3. Optionally, for a CB-msg3 based EDT, the first message is CB-Msg3.

[0196] Optionally, when the terminal device uses DSA technology to send the first message, the terminal device may send multiple first messages, which are also referred to as multiple copies of the first message. For example, when the terminal device uses DSA technology to send CB-Msg3, the terminal device may send multiple identical CB-Msg3s, which are also referred to as multiple copies of CB-Msg3.

[0197] Optionally, the first message carries uplink data. For example, for a traditional EDT, the first message is Msg3, and Msg3 carries the uplink data of the EDT. For example, for a CB-Msg3 based EDT, the first message is CB-Msg3, and CB-Msg3 carries the uplink data of the EDT.

[0198] In some embodiments, the transmission resources of the k-th first message refer to the transmission resources used by the terminal device to send the k-th first message. The transmission resources include at least one of the following: time-domain resources, frequency-domain resources, and code-domain resources. The time-domain resources may be subframes, SFNs, H-SFNs, etc. The frequency-domain resources may be subcarriers, carriers, PRBs (Physical Resource Blocks), etc. The code-domain resources may be OCCs.

[0199] For example, for EDT, the terminal device needs to send N copies of Msg3 within the first time window, and the N copy transmissions correspond to different time domain resources. The above N copy transmissions belong to the same EDT attempt.

[0200] In some embodiments, the first time window can be configured by the network device, for example, the duration of the first time window can be configured by the network device. The start time of the first time window can be configured by the network device or determined by the terminal device. For example, for a traditional EDT, the start time of the first time window can be the time when the terminal device sends Msg1 or Msg3. For example, for a CB-msg3 based EDT, the start time of the first time window can be the time when the terminal device sends CB-msg3.

[0201] For N first messages sent in a single EDT attempt, the terminal device carries first information corresponding to at least N-1 of the N first messages in the payload corresponding to each first message.

[0202] In one example, for N first messages that an EDT attempts to send, the terminal device carries the first information corresponding to each of the N first messages in the payload of each first message.

[0203] In one example, for N first messages that an EDT attempts to send, the terminal device carries in the payload corresponding to each of the N first messages the first information corresponds to, respectively, the first information of the other N-1 first messages besides the first message sent in this instance.

[0204] Furthermore, the first information corresponding to the k-th first message among N first messages is related to the transmission resources used to send the k-th first message. For example, it is related to at least one of the time-domain resources, frequency-domain resources, and code-domain resources used to send the k-th first message.

[0205] In some embodiments, the first information corresponding to the kth first message includes any one of the following information.

[0206] (1) RNTI determined based on the transmission resources of the kth first message.

[0207] (2) The RNTI determined based on the transmission resources of the kth first message, and the time when the terminal device starts using the RNTI to receive the second message.

[0208] (3) The RNTI determined based on the transmission resources of the kth first message, and the time when the terminal device sends the kth first message.

[0209] (4) Transmission resources for the kth first message.

[0210] The RNTI determined based on the transmission resources of the k-th first message refers to the RNTI used by the terminal device to receive the second message after sending the k-th first message, or in other words, to receive the first PDCCH and / or the first PDSCH. The first PDCCH is used to schedule the reception of the second message, and the first PDSCH is used to carry the second message. Optionally, the first message is Msg3, and the second message is Msg4. The RNTI used to receive the second message is determined based on the transmission resources of the k-th first message. For the specific determination method, please refer to the description of the above embodiments, which will not be repeated here.

[0211] Optionally, the RNTI used by the terminal device to send the first message may be the same as or different from the RNTI used to receive the second message. If the RNTI used by the terminal device to send the first message is the same as the RNTI used to receive the second message, the RNTI determined based on the transmission resources of the k-th first message can also be understood as the RNTI used by the terminal device to send the k-th first message.

[0212] Optionally, for (1) to (3) above, if the first information corresponding to the kth first message includes the RNTI determined based on the transmission resources of the kth first message, the first information may include the RNTI itself, or it may include other information that can determine the RNTI, such as the offset of the RNTI relative to a reference RNTI. The reference RNTI may be configured by the network device or predefined by the protocol. For example, the reference RNTI may be one of the RNTIs available in the EDT, such as the smallest RNTI in the range of RNTIs available in the EDT.

[0213] Optionally, as shown in Figure 10, step 910 above is followed by step 920.

[0214] Step 920: After receiving the i-th first message, the network device determines the remaining N-1 first messages (excluding the i-th first message) from the N first messages based on the first information included in the i-th first message. For the remaining N-1 first messages, the network device does not provide feedback on the second message.

[0215] After receiving the first message, the network device can determine multiple first messages belonging to the same EDT attempt based on the first information carried in the first message. For multiple first messages belonging to the same EDT attempt, the network device only needs to send a second message feedback once, which can effectively avoid repeatedly responding to different Msg3 copy transmissions of the same terminal device. This reduces the implementation complexity of the network device and effectively saves system resources.

[0216] In some embodiments, the transmission resources of the k-th first message are determined based on at least one of the following: time-domain indication information, frequency-domain indication information, and code-domain indication information. The time-domain indication information indicates the time-domain resources of the k-th first message, i.e., the time-domain resources used to send the k-th first message. The time-domain indication information may include indexes of the time-domain resources, such as subframe ID, SFN ID, H-SFN ID, etc. The frequency-domain indication information indicates the frequency-domain resources of the k-th first message, i.e., the frequency-domain resources used to send the k-th first message. The frequency-domain indication information may include indexes of the frequency-domain resources, such as subcarrier index, carrier index, PRB index, etc. The code-domain indication information indicates the code-domain resources of the k-th first message, i.e., the code-domain resources used to send the k-th first message. The code-domain indication information may include indexes of the code-domain resources, such as OCC indexes. OCCs can be numbered according to certain rules, or the index (or number) corresponding to each OCC can be determined by network configuration.

[0217] Optionally, the time-domain indication information is used to indicate the first or last time-domain unit of the time-domain resource of the k-th first message. The time-domain unit can be a subframe, SFN, H-SFN, etc.

[0218] Optionally, the frequency domain indication information is used to indicate the first or last frequency domain unit of the frequency domain resource of the k-th first message. The frequency domain unit can be a subcarrier, carrier, PRB, etc.

[0219] Optionally, the code field indication information is used to indicate the index of the code field resource of the k-th first message. The code field resource can be an out-of-compete (OOC).

[0220] In addition, time-domain indication information and / or frequency-domain indication information can be absolute location information of time-domain resources and / or frequency-domain resources. For example, for time-domain indication information, it can be subframe ID, SFN ID, H-SFN ID, etc., and for frequency-domain resource location information, it can be subcarrier index, carrier index, PRB index, etc. Time-domain indication information and / or frequency-domain indication information can also be relative location information of time-domain resources and / or frequency-domain resources, that is, the offset relative to a reference resource location. For example, the reference resource location is a time-domain and / or frequency-domain resource corresponding to the start time of the first time window, or the reference resource location is the time-domain and / or frequency-domain resource used to send the kth first message. The time-domain indication information and / or frequency-domain indication information can also be absolute position information + relative position information. For example, the absolute position of the time-domain and / or frequency-domain resources corresponding to the transmission of the first first message copy in N first message copy transmissions + the relative position of the time-domain and / or frequency-domain resources corresponding to the transmission of the remaining N-1 first message copy transmissions (using the position of the time-domain and / or frequency-domain resources corresponding to the transmission of the first first message copy transmission as the reference resource position).

[0221] In some embodiments, the first information is carried in the MAC CE (Medium Access Control Control Element).

[0222] The technical solution provided in this application embodiment, for DSA-based EDT transmission, allows the terminal device to carry first information in the first message it sends, so that the network device knows the RNTI used by the terminal device to listen to the network device's response at each moment. At the same time, it can effectively avoid the network device repeatedly responding to different copies of the first message of the same terminal device, which can reduce the implementation complexity of the network device and effectively save system resources.

[0223] It should be noted that, in the above method embodiments, the steps executed by the terminal device can be implemented independently as a wireless communication method on the terminal device side, and the steps executed by the network device can be implemented independently as a wireless communication method on the network device side. Furthermore, the various embodiments of this application can be arbitrarily combined to form new embodiments, all of which are within the protection scope of this application.

[0224] The following are embodiments of the apparatus described in this application, which can be used to execute the embodiments of the method described in this application. For details not disclosed in the apparatus embodiments of this application, please refer to the embodiments of the method described in this application.

[0225] Please refer to Figure 11, which shows a block diagram of a wireless communication device according to an embodiment of this application. This device has the function of implementing the wireless communication method described above on the terminal device side. This function can be implemented in hardware or by hardware executing corresponding software. The device can be the terminal device described above, or it can be disposed within a terminal device. As shown in Figure 11, the device 1100 may include a transceiver module 1110.

[0226] In some embodiments, the transceiver module 1110 is configured to receive a second message based on a first RNTI after sending a first message, wherein the first RNTI is determined based on the transmission resources of the first message.

[0227] In some embodiments, when sending N first messages based on DSA, the transceiver module 1110 is configured to receive the second message based on the i-th first RNTI after sending the i-th first message among the N first messages, wherein the i-th first RNTI is determined based on the transmission resources of the i-th first message, N is an integer greater than 1, and i is a positive integer less than or equal to N.

[0228] In some embodiments, as shown in FIG11, the device 1110 further includes a processing module 1120, configured to start a first timer after sending the first first message out of N first messages. The transceiver module 1110 is configured to receive the second message based on a first first RNTI during the operation of the first timer, wherein the first first RNTI is determined based on the transmission resources of the first first message. The processing module 1120 is further configured to change the first RNTI used to receive the second message from the (i-1)th first RNTI to the ith first RNTI after sending the i-th first message out of N first messages. The transceiver module 1110 is configured to receive the second message based on the ith first RNTI, where i is an integer greater than 1.

[0229] In some embodiments, the time when the first timer is started is: the time when the first message is sent; or, the time after the first message is sent, after a first duration.

[0230] In some embodiments, the first duration is configured by the network device, or pre-configured, or specified by a standard, or depends on the implementation of the terminal device; or, the first duration is determined based on the round-trip time between the terminal device and the network device; or, the first duration is determined based on the round-trip time between the terminal device and the network device and the processing time, wherein the processing time is configured by the network device, or pre-configured, or specified by a standard, or depends on the implementation of the terminal device.

[0231] In some embodiments, the processing module 1120 is configured to, after sending the i-th first message out of N first messages, change the first RNTI used to receive the second message from the (i-1)-th first RNTI to the i-th first RNTI, starting at a first moment. The transceiver module 1110 is configured to receive the second message based on the i-th first RNTI. The first moment is determined based on the moment when the i-th first message is completed.

[0232] In some embodiments, the first time is: the time when the i-th first message is sent; or, the time after a second duration following the time when the i-th first message is sent; or, the time when the first timer is started or restarted.

[0233] In some embodiments, the second duration is configured by the network device, or pre-configured, or specified by a standard, or depends on the implementation of the terminal device; or, the second duration is determined based on the round-trip time between the terminal device and the network device; or, the second duration is determined based on the round-trip time between the terminal device and the network device and the processing time, wherein the processing time is configured by the network device, or pre-configured, or specified by a standard, or depends on the implementation of the terminal device.

[0234] In some embodiments, the time to start or restart the first timer is: the time when the i-th first message is sent; or, the time after the i-th first message is sent, after a first duration.

[0235] In some embodiments, the transmission resources include at least one of the following: time-domain resources, frequency-domain resources, and code-domain resources.

[0236] In some embodiments, the first RNTI is used to receive a first PDCCH and / or a first PDSCH, the first PDCCH is used to schedule the reception of the second message, and the first PDSCH is used to carry the second message.

[0237] In some embodiments, the RNTI used by the terminal device to send the first message is the same as the RNTI used to receive the second message; or, the RNTI used by the terminal device to send the first message is different from the RNTI used to receive the second message.

[0238] In some embodiments, the first message is CB-Msg3 and the second message is Msg4.

[0239] In some embodiments, the transceiver module 1110 is configured to send N first messages based on DSA within a first time window, where N is an integer greater than 1; for the i-th first message among the N first messages, the i-th first message includes: first information corresponding to each of the N first messages; or, first information corresponding to the remaining N-1 first messages other than the i-th first message among the N first messages; wherein, the first information corresponding to the k-th first message among the N first messages is related to the transmission resources of the k-th first message, and i and k are both positive integers less than or equal to N.

[0240] In some embodiments, the first information corresponding to the kth first message includes: a Radio Network Temporary Identifier (RNTI) determined based on the transmission resources of the kth first message; or, the RNTI determined based on the transmission resources of the kth first message, and the time when the terminal device starts using the RNTI to receive a second message; or, the RNTI determined based on the transmission resources of the kth first message, and the time when the terminal device sends the kth first message; or, the transmission resources of the kth first message.

[0241] In some embodiments, the transmission resources of the kth first message are determined based on at least one of the following: time domain indication information for indicating the time domain resources of the kth first message; frequency domain indication information for indicating the frequency domain resources of the kth first message; and code domain indication information for indicating the code domain resources of the kth first message.

[0242] In some embodiments, the time-domain indication information is used to indicate the first or last time-domain unit of the time-domain resource of the k-th first message; and / or, the frequency-domain indication information is used to indicate the first or last frequency-domain unit of the frequency-domain resource of the k-th first message; and / or, the code-domain indication information is used to indicate the index of the code-domain resource of the k-th first message.

[0243] In some embodiments, the first information is carried in the MAC CE.

[0244] In some embodiments, the transmission resources include at least one of the following: time-domain resources, frequency-domain resources, and code-domain resources.

[0245] In some embodiments, the first message is CB-Msg3.

[0246] Please refer to Figure 12, which shows a block diagram of a wireless communication device provided in another embodiment of this application. This device has the function of implementing the wireless communication method on the network device side described above. This function can be implemented in hardware or by hardware executing corresponding software. This device can be the network device described above, or it can be disposed within a network device. As shown in Figure 12, the device 1200 may include a transceiver module 1210.

[0247] In some embodiments, the transceiver module 1210 is configured to send a second message based on a first RNTI after receiving a first message sent by a terminal device, wherein the first RNTI is determined based on the transmission resources of the first message.

[0248] In some embodiments, the transceiver module 1210 is configured to send the second message based on the i-th first RNTI after receiving the i-th first message among N first messages sent by the terminal device, wherein the i-th first RNTI is determined based on the transmission resources of the i-th first message, N is an integer greater than 1, and i is a positive integer less than or equal to N.

[0249] In some embodiments, as shown in FIG12, the device 1200 further includes a processing module 1220, configured to, after receiving the i-th first message among N first messages sent by the terminal device, change the first RNTI used to send the second message from the (i-1)-th first RNTI to the i-th first RNTI. The transceiver module 1210 is configured to send the second message based on the i-th first RNTI, where i is an integer greater than 1.

[0250] In some embodiments, the transmission resources include at least one of the following: time-domain resources, frequency-domain resources, and code-domain resources.

[0251] In some embodiments, the first RNTI is used to receive a first PDCCH and / or a first PDSCH, the first PDCCH is used to schedule the reception of the second message, and the first PDSCH is used to carry the second message.

[0252] In some embodiments, the RNTI used by the terminal device to send the first message is the same as the RNTI used to receive the second message; or, the RNTI used by the terminal device to send the first message is different from the RNTI used to receive the second message.

[0253] In some embodiments, the first message is CB-Msg3 and the second message is Msg4.

[0254] In some embodiments, the transceiver module 1210 is configured to receive N first messages sent by the terminal device based on DSA within a first time window, where N is an integer greater than 1; for the i-th first message among the N first messages, the i-th first message includes: first information corresponding to each of the N first messages; or, first information corresponding to the remaining N-1 first messages other than the i-th first message among the N first messages; wherein, the first information corresponding to the k-th first message among the N first messages is related to the transmission resources of the k-th first message, and i and k are both positive integers less than or equal to N.

[0255] In some embodiments, the first information corresponding to the kth first message includes: an RNTI determined based on the transmission resources of the kth first message; or, an RNTI determined based on the transmission resources of the kth first message and the time when the terminal device starts using the RNTI to receive a second message; or, an RNTI determined based on the transmission resources of the kth first message and the time when the terminal device sends the kth first message; or, the transmission resources of the kth first message.

[0256] In some embodiments, the transmission resources of the kth first message are determined based on at least one of the following: time domain indication information for indicating the time domain resources of the kth first message; frequency domain indication information for indicating the frequency domain resources of the kth first message; and code domain indication information for indicating the code domain resources of the kth first message.

[0257] In some embodiments, the time-domain indication information is used to indicate the first or last time-domain unit of the time-domain resource of the k-th first message; and / or, the frequency-domain indication information is used to indicate the first or last frequency-domain unit of the frequency-domain resource of the k-th first message; and / or, the code-domain indication information is used to indicate the index of the code-domain resource of the k-th first message.

[0258] In some embodiments, the first information is carried in the MAC CE.

[0259] In some embodiments, the processing module 1220 is further configured to, after receiving the i-th first message, determine the remaining N-1 first messages among the N first messages excluding the i-th first message based on the first information included in the i-th first message, wherein the network device does not provide feedback of a second message for the remaining N-1 first messages.

[0260] In some embodiments, the transmission resources include at least one of the following: time-domain resources, frequency-domain resources, and code-domain resources.

[0261] In some embodiments, the first message is CB-Msg3.

[0262] It should be noted that the above embodiments only illustrate the division of the above functional modules when implementing the device. In actual applications, the above functions can be assigned to different functional modules according to actual needs, that is, the content structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0263] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operations has been described in detail in the embodiments related to the method, and will not be elaborated upon here. For details not described in detail in the apparatus embodiments, please refer to the above method embodiments.

[0264] Please refer to 13, which shows a schematic diagram of a terminal device provided in one embodiment of this application. The terminal device 1300 may include a processor 1301, a transceiver 1302, and a memory 1303. The processor 1301 is used to implement various processing functions of the terminal device 1300, such as generating information to be sent, processing received information, controlling transmission and / or reception, etc., such as implementing the functions of the processing module 1120 described above. The transceiver 1302 is used to implement transmission and / or reception functions, such as implementing the functions of the transceiver module 1110 described above.

[0265] The processor 1301 includes one or more processing cores. The processor 1301 executes various functional applications and information processing by running software programs and modules.

[0266] The transceiver 1302 may include a receiver and a transmitter. For example, the receiver and transmitter may be implemented as the same wireless communication component, which may include a wireless communication chip and a radio frequency antenna.

[0267] The memory 1303 can be connected to the processor 1301 and the transceiver 1302.

[0268] The memory 1303 can be used to store a computer program executed by the processor, and the processor 1301 is used to execute the computer program to implement the various steps in the above method embodiments.

[0269] In some embodiments, transceiver 1302 is configured to receive a second message based on a first RNTI after sending a first message, wherein the first RNTI is determined based on the transmission resources of the first message.

[0270] In some embodiments, the transceiver 1302 is configured to send N first messages based on DSA within a first time window, where N is an integer greater than 1; for the i-th first message among the N first messages, the i-th first message includes: first information corresponding to each of the N first messages; or, first information corresponding to the remaining N-1 first messages other than the i-th first message among the N first messages; wherein, the first information corresponding to the k-th first message among the N first messages is related to the transmission resources of the k-th first message, and i and k are both positive integers less than or equal to N.

[0271] For details not described in this embodiment, please refer to the embodiments above, which will not be repeated here.

[0272] Furthermore, the memory can be implemented by any type of volatile or non-volatile storage device or a combination thereof, including but not limited to: magnetic disks or optical disks, electrically erasable programmable read-only memory, erasable programmable read-only memory, statically accessible memory, read-only memory, magnetic memory, flash memory, and programmable read-only memory.

[0273] Please refer to Figure 14, which shows a schematic diagram of a network device provided in one embodiment of this application. The network device 1400 may include a processor 1401, a transceiver 1402, and a memory 1403. The processor 1401 can be used to implement various processing functions of the network device 1400, such as generating information to be sent, processing received information, controlling transmission and / or reception, etc., such as implementing the functions of the processing module 1220 described above. The transceiver 1402 is used to implement transmission and / or reception functions, such as implementing the functions of the transceiver module 1210 described above.

[0274] The processor 1401 includes one or more processing cores, and the processor 1401 executes various functional applications and information processing by running software programs and modules.

[0275] Transceiver 1402 may include a receiver and a transmitter. For example, transceiver 1402 may include a wired communication component, which may include a wired communication chip and a wired interface (such as a fiber optic interface). Optionally, transceiver 1402 may also include a wireless communication component, which may include a wireless communication chip and a radio frequency antenna.

[0276] The memory 1403 can be connected to the processor 1401 and the transceiver 1402.

[0277] The memory 1403 can be used to store a computer program executed by the processor, and the processor 1401 is used to execute the computer program to implement the various steps performed by the network device in the above method embodiment.

[0278] In some embodiments, transceiver 1402 is configured to send a second message based on a first RNTI after receiving a first message sent by a terminal device, wherein the first RNTI is determined based on the transmission resources of the first message.

[0279] In some embodiments, the transceiver 1402 is configured to receive N first messages sent by the terminal device based on DSA within a first time window, where N is an integer greater than 1; for the i-th first message among the N first messages, the i-th first message includes: first information corresponding to each of the N first messages; or, first information corresponding to the remaining N-1 first messages other than the i-th first message among the N first messages; wherein, the first information corresponding to the k-th first message among the N first messages is related to the transmission resources of the k-th first message, and i and k are both positive integers less than or equal to N.

[0280] For details not described in this embodiment, please refer to the embodiments above, which will not be repeated here.

[0281] Furthermore, the memory 1403 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, including but not limited to: magnetic disks or optical disks, electrically erasable programmable read-only memory, erasable programmable read-only memory, static on-demand memory, read-only memory, magnetic memory, flash memory, and programmable read-only memory.

[0282] This application also provides a computer-readable storage medium storing a computer program for execution by a processor to implement the aforementioned wireless communication method on the terminal device side or the aforementioned wireless communication method on the network device side. In some embodiments, the computer-readable storage medium may include ROM (Read-Only Memory), RAM (Random-Access Memory), SSD (Solid State Drives), or optical disc, etc. The random access memory may include ReRAM (Resistance Random Access Memory) and DRAM (Dynamic Random Access Memory).

[0283] This application also provides a chip, which includes programmable logic circuits and / or program instructions. When the chip is running, it is used to implement the wireless communication method on the terminal device side described above.

[0284] This application embodiment also provides a chip, which includes programmable logic circuits and / or program instructions. When the chip runs in a terminal device, it is used to: receive a second message based on a first RNTI after sending a first message, wherein the first RNTI is determined based on the transmission resources of the first message; and / or, to: send N first messages based on DSA within a first time window, where N is an integer greater than 1; for the i-th first message among the N first messages, the i-th first message includes: first information corresponding to each of the N first messages; or, first information corresponding to the remaining N-1 first messages other than the i-th first message among the N first messages; wherein the first information corresponding to the k-th first message among the N first messages is related to the transmission resources of the k-th first message, and i and k are both positive integers less than or equal to N. When the chip runs in the terminal device, it is also used to implement other steps executed by the terminal device as described in the above embodiments, which will not be repeated here.

[0285] This application also provides a chip, which includes programmable logic circuits and / or program instructions, and when the chip is running, it is used to implement the wireless communication method on the network device side described above.

[0286] This application embodiment also provides a chip, which includes programmable logic circuits and / or program instructions. When the chip runs in a network device, it is used to: after receiving a first message sent by a terminal device, send a second message based on a first RNTI, wherein the first RNTI is determined based on the transmission resources of the first message; and / or, to: within a first time window, receive N first messages sent by the terminal device based on DSA, where N is an integer greater than 1; for the i-th first message among the N first messages, the i-th first message includes: first information corresponding to each of the N first messages; or, first information corresponding to the remaining N-1 first messages other than the i-th first message among the N first messages; wherein the first information corresponding to the k-th first message among the N first messages is related to the transmission resources of the k-th first message, and i and k are both positive integers less than or equal to N. When the chip runs in a network device, it is also used to implement other steps executed by the network device as described in the above embodiments, which will not be repeated here.

[0287] This application also provides a computer program product, which includes computer instructions stored in a computer-readable storage medium. A processor reads and executes the computer instructions from the computer-readable storage medium to implement the wireless communication method on the terminal device side or the wireless communication method on the network device side.

[0288] It should be understood that the term "instruction" mentioned in the embodiments of this application can be a direct instruction, an indirect instruction, or an indication of a relationship. For example, A instructing B can mean that A directly instructs B, such as B being able to obtain information through A; it can also mean that A indirectly instructs B, such as A instructing C, so B can obtain information through C; or it can mean that there is a relationship between A and B.

[0289] In the description of the embodiments of this application, the term "correspondence" may indicate that there is a direct or indirect correspondence between two things, or that there is an association between two things, or that there is a relationship of instruction and being instructed, configuration and being configured, etc.

[0290] In some embodiments of this application, "predefined" can be achieved by pre-storing corresponding codes, tables, or other means that can be used to indicate relevant information in the device (e.g., including terminal devices and network devices). This application does not limit the specific implementation method. For example, predefined can refer to what is defined in the protocol.

[0291] In some embodiments of this application, the term "protocol" may refer to standard protocols in the field of communications, such as BLE protocol, Wi-Fi protocol, and related protocols applied in future communication systems. This application does not limit the scope of these protocols.

[0292] In this article, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0293] In this article, "greater than or equal to" can mean greater than or equal to, and "less than or equal to" can mean less than or equal to.

[0294] Furthermore, the step numbers described herein are merely illustrative of one possible execution order between steps. In some other embodiments, the steps may not be executed in the order of their numbers, such as two steps with different numbers being executed simultaneously, or two steps with different numbers being executed in the reverse order of the illustration. This application does not limit this.

[0295] Those skilled in the art will recognize that the functions described in the embodiments of this application in one or more of the above examples can be implemented using hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or code on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any medium that facilitates the transfer of a computer program from one place to another. Storage media can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0296] The above description is merely an exemplary embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A wireless communication method, characterized in that, The method is executed by a terminal device, and the method includes: After sending the first message, a second message is received based on the first Radio Network Temporary Identifier (RNTI), wherein the first RNTI is determined based on the transmission resources of the first message.

2. The method according to claim 1, characterized in that, In the case of sending N first messages based on DSA, the step of receiving a second message based on a first RNTI after sending the first message includes: After sending the i-th first message out of N first messages, the second message is received based on the i-th first RNTI, wherein the i-th first RNTI is determined based on the transmission resources of the i-th first message, N is an integer greater than 1, and i is a positive integer less than or equal to N.

3. The method according to claim 2, characterized in that, The step of receiving the second message based on the i-th first RNTI after sending the i-th first message out of N first messages includes: After sending the first of N first messages, start the first timer; During the operation of the first timer, the second message is received based on the first first RNTI, the first first RNTI being determined based on the transmission resources of the first first message; After sending the i-th first message out of N first messages, the first RNTI used to receive the second message is changed from the (i-1)-th first RNTI to the i-th first RNTI, and the second message is received based on the i-th first RNTI, where i is an integer greater than 1.

4. The method according to claim 3, characterized in that, The time when the first timer is started is: The moment when the first message is sent is completed; or, After the first message is sent, a first duration elapses.

5. The method according to claim 4, characterized in that, The first duration is configured by the network device, or pre-configured, or specified by a standard, or depends on the implementation of the terminal device; or, The first duration is determined based on the round-trip time between the terminal device and the network device; or, The first duration is determined based on the round-trip latency and processing time between the terminal device and the network device, wherein the processing time is configured by the network device, or pre-configured, or specified by a standard, or depends on the implementation of the terminal device.

6. The method according to any one of claims 3 to 5, characterized in that, After sending the i-th first message out of N first messages, the step of changing the first RNTI used to receive the second message from the (i-1)-th first RNTI to the i-th first RNTI, and receiving the second message based on the i-th first RNTI, includes: After sending the i-th first message out of N first messages, starting at the first moment, the first RNTI used to receive the second message is changed from the (i-1)-th first RNTI to the i-th first RNTI, and the second message is received based on the i-th first RNTI; The first time is determined based on the time when the i-th first message is sent.

7. The method according to claim 6, characterized in that, The first moment is: The moment when the i-th first message is sent is completed; or... After the completion of the i-th first message transmission, a second duration elapses; or... The moment when the first timer is started or restarted.

8. The method according to claim 7, characterized in that, The second duration is configured by the network device, or pre-configured, or specified by a standard, or depends on the implementation of the terminal device; or, The second duration is determined based on the round-trip time between the terminal device and the network device; or, The second duration is determined based on the round-trip latency and processing time between the terminal device and the network device, wherein the processing time is configured by the network device, or pre-configured, or specified by a standard, or depends on the implementation of the terminal device.

9. The method according to claim 8, characterized in that, The time when the first timer is started or restarted is: The moment when the i-th first message is sent is completed; or... After the time when the i-th first message is sent is completed, a first duration of time has elapsed.

10. The method according to any one of claims 1 to 9, characterized in that, The transmission resources include at least one of the following: time domain resources, frequency domain resources, and code domain resources.

11. The method according to any one of claims 1 to 10, characterized in that, The first RNTI is used to receive the first physical downlink control channel PDCCH and / or the first physical downlink shared channel PDSCH. The first PDCCH is used to schedule the reception of the second message, and the first PDSCH is used to carry the second message.

12. The method according to any one of claims 1 to 11, characterized in that, The RNTI used by the terminal device to send the first message is the same as the RNTI used to receive the second message; or... The RNTI used by the terminal device to send the first message is different from the RNTI used to receive the second message.

13. The method according to any one of claims 1 to 12, characterized in that, The first message is a contention-based message 3CB-Msg3, and the second message is message 4Msg4.

14. A wireless communication method, characterized in that, The method is executed by a terminal device, and the method includes: Within the first time window, N first messages are sent based on DSA, where N is an integer greater than 1; For the i-th first message among the N first messages, the i-th first message includes: The first information corresponding to each of the N first messages; or... Among the N first messages, the remaining N-1 first messages, excluding the i-th first message, correspond to the first information respectively; Among them, the first information corresponding to the kth first message in the N first messages is related to the transmission resources of the kth first message, and i and k are both positive integers less than or equal to N.

15. The method according to claim 14, characterized in that, The first information corresponding to the kth first message includes: The Radio Network Temporary Identifier (RNTI) determined based on the transmission resources of the k-th first message; or, The RNTI determined based on the transmission resources of the k-th first message, and the time when the terminal device begins to use the RNTI to receive the second message; or, The RNTI determined based on the transmission resources of the k-th first message, and the time when the terminal device sends the k-th first message; or, The transmission resources for the kth first message.

16. The method according to claim 15, characterized in that, The transmission resources for the kth first message are determined based on at least one of the following: Time-domain indication information, used to indicate the time-domain resources of the kth first message; Frequency domain indication information, used to indicate the frequency domain resources of the kth first message; Code field indication information is used to indicate the code field resources of the kth first message.

17. The method according to claim 16, characterized in that, The time-domain indication information is used to indicate the first or last time-domain unit of the time-domain resource of the k-th first message; and / or, The frequency domain indication information is used to indicate the first or last frequency domain unit of the frequency domain resource of the k-th first message; and / or, The code field indication information is used to indicate the index of the code field resource of the kth first message.

18. The method according to any one of claims 14 to 17, characterized in that, The first information is carried in the Media Access Control (MAC) control element CE.

19. The method according to any one of claims 14 to 18, characterized in that, The transmission resources include at least one of the following: time domain resources, frequency domain resources, and code domain resources.

20. The method according to any one of claims 14 to 19, characterized in that, The first message is a contention-based message 3CB-Msg3.

21. A wireless communication method, characterized in that, The method is performed by a network device, and the method includes: After receiving the first message from the terminal device, a second message is sent based on the first wireless network temporary identifier (RNTI), wherein the first RNTI is determined based on the transmission resources of the first message.

22. The method according to claim 21, characterized in that, When the terminal device sends N first messages based on DSA, the step of sending a second message based on a first RNTI after receiving the first message sent by the terminal device includes: After receiving the i-th first message out of the N first messages sent by the terminal device, the second message is sent based on the i-th first RNTI, wherein the i-th first RNTI is determined based on the transmission resources of the i-th first message, N is an integer greater than 1, and i is a positive integer less than or equal to N.

23. The method according to claim 22, characterized in that, After receiving the i-th first message out of N first messages sent by the terminal device, sending the second message based on the i-th first RNTI includes: After receiving the i-th first message out of the N first messages sent by the terminal device, the first RNTI used to send the second message is changed from the (i-1)-th first RNTI to the i-th first RNTI, and the second message is sent based on the i-th first RNTI, where i is an integer greater than 1.

24. The method according to any one of claims 21 to 23, characterized in that, The transmission resources include at least one of the following: time domain resources, frequency domain resources, and code domain resources.

25. The method according to any one of claims 21 to 24, characterized in that, The first RNTI is used to receive the first physical downlink control channel PDCCH and / or the first physical downlink shared channel PDSCH. The first PDCCH is used to schedule the reception of the second message, and the first PDSCH is used to carry the second message.

26. The method according to any one of claims 21 to 25, characterized in that, The RNTI used by the terminal device to send the first message is the same as the RNTI used to receive the second message; or... The RNTI used by the terminal device to send the first message is different from the RNTI used to receive the second message.

27. The method according to any one of claims 21 to 26, characterized in that, The first message is a contention-based message 3CB-Msg3, and the second message is message 4Msg4.

28. A wireless communication method, characterized in that, The method is performed by a network device, and the method includes: Within the first time window, receive N first messages sent by the receiving terminal device based on DSA, where N is an integer greater than 1; For the i-th first message among the N first messages, the i-th first message includes: The first information corresponding to each of the N first messages; or... Among the N first messages, the remaining N-1 first messages, excluding the i-th first message, correspond to the first information respectively; Among them, the first information corresponding to the kth first message in the N first messages is related to the transmission resources of the kth first message, and i and k are both positive integers less than or equal to N.

29. The method according to claim 28, characterized in that, The first information corresponding to the kth first message includes: The Radio Network Temporary Identifier (RNTI) determined based on the transmission resources of the k-th first message; or, The RNTI determined based on the transmission resources of the k-th first message, and the time when the terminal device begins to use the RNTI to receive the second message; or, The RNTI determined based on the transmission resources of the k-th first message, and the time when the terminal device sends the k-th first message; or, The transmission resources for the kth first message.

30. The method according to claim 29, characterized in that, The transmission resources for the kth first message are determined based on at least one of the following: Time-domain indication information, used to indicate the time-domain resources of the kth first message; Frequency domain indication information, used to indicate the frequency domain resources of the kth first message; Code field indication information is used to indicate the code field resources of the kth first message.

31. The method according to claim 30, characterized in that, The time-domain indication information is used to indicate the first or last time-domain unit of the time-domain resource of the k-th first message; and / or, The frequency domain indication information is used to indicate the first or last frequency domain unit of the frequency domain resource of the k-th first message; and / or, The code field indication information is used to indicate the index of the code field resource of the kth first message.

32. The method according to any one of claims 28 to 31, characterized in that, The first information is carried in the Media Access Control (MAC) control element CE.

33. The method according to any one of claims 28 to 32, characterized in that, The method further includes: After receiving the i-th first message, based on the first information included in the i-th first message, determine the remaining N-1 first messages among the N first messages excluding the i-th first message, wherein the network device does not send a second message for the remaining N-1 first messages.

34. The method according to any one of claims 28 to 33, characterized in that, The transmission resources include at least one of the following: time domain resources, frequency domain resources, and code domain resources.

35. The method according to any one of claims 28 to 34, characterized in that, The first message is a contention-based message 3CB-Msg3.

36. A wireless communication device, characterized in that, The device includes: The transceiver module is configured to receive a second message based on a first radio network temporary identifier (RNTI) after sending a first message, wherein the first RNTI is determined based on the transmission resources of the first message.

37. A wireless communication device, characterized in that, The device includes: The transceiver module is used to send N first messages based on DSA within the first time window, where N is an integer greater than 1; For the i-th first message among the N first messages, the i-th first message includes: The first information corresponding to each of the N first messages; or... Among the N first messages, the remaining N-1 first messages, excluding the i-th first message, correspond to the first information respectively; Among them, the first information corresponding to the kth first message in the N first messages is related to the transmission resources of the kth first message, and i and k are both positive integers less than or equal to N.

38. A wireless communication device, characterized in that, The device includes: The transceiver module is configured to send a second message based on a first wireless network temporary identifier (RNTI) after receiving a first message from a terminal device, wherein the first RNTI is determined based on the transmission resources of the first message.

39. A wireless communication device, characterized in that, The device includes: The transceiver module is used to receive N first messages sent by the terminal device based on DSA within the first time window, where N is an integer greater than 1; For the i-th first message among the N first messages, the i-th first message includes: The first information corresponding to each of the N first messages; or... Among the N first messages, the remaining N-1 first messages, excluding the i-th first message, correspond to the first information respectively; Among them, the first information corresponding to the kth first message in the N first messages is related to the transmission resources of the kth first message, and i and k are both positive integers less than or equal to N.

40. A communication device, characterized in that, The communication device includes a processor and a memory, the memory storing a computer program, the processor executing the computer program to implement the method as claimed in any one of claims 1 to 13, or the method as claimed in any one of claims 14 to 20, or the method as claimed in any one of claims 21 to 27, or the method as claimed in any one of claims 28 to 35.

41. A computer-readable storage medium, characterized in that, The storage medium stores a computer program that is executed by a processor to implement the method as claimed in any one of claims 1 to 13, or the method as claimed in any one of claims 14 to 20, or the method as claimed in any one of claims 21 to 27, or the method as claimed in any one of claims 28 to 35.

42. A chip, characterized in that, The chip includes programmable logic circuitry and / or program instructions, which, when the chip is running, are used to implement the method as described in any one of claims 1 to 13, or the method as described in any one of claims 14 to 20, or the method as described in any one of claims 21 to 27, or the method as described in any one of claims 28 to 35.

43. A computer program product, characterized in that, The computer program product includes computer instructions stored in a computer-readable storage medium, which a processor reads from and executes to implement the method as claimed in any one of claims 1 to 13, or the method as claimed in any one of claims 14 to 20, or the method as claimed in any one of claims 21 to 27, or the method as claimed in any one of claims 28 to 35.

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