Method and apparatus for wireless communication

Abstract

Provided are a method and apparatus for wireless communication, which facilitate a terminal device to perform access on the basis of EDT. The method comprises: a first terminal device sends a first message on a first resource, the first message being used for requesting first EDT; and the first terminal device receives a feedback message of the first EDT sent by a network device, the feedback message of the first EDT comprising a first RNTI, wherein the first resource is one of a plurality of public PURs, the plurality of public PURs correspond to a plurality of RNTIs comprising the first RNTI, and the first RNTI corresponds to the first resource or the first message comprises the first RNTI.

Description

Method and apparatus for wireless communication TECHNICAL FIELD

[0001] The present application relates to the technical field of communication, and more particularly, to a method and apparatus for wireless communication. BACKGROUND

[0002] To reduce signaling overhead and power consumption, a terminal device in an idle state can directly perform early data transmission (EDT) through preconfigured uplink resources (PUR) without performing a random access procedure based on a random access channel (RACH). For example, in a non-terrestrial network (NTN) system, multiple terminal devices can perform RACH-less EDT through PUR.

[0003] However, an NTN cell has problems such as a large coverage range and long transmission delay. In such a scenario, how a terminal device more efficiently performs RACH-less EDT becomes a technical problem to be solved.

[0004] SUMMARY

[0005] The present application provides a method and apparatus for wireless communication. The following introduces each aspect of the embodiments of the present application.

[0006] In a first aspect, a method for wireless communication is provided, comprising: a first terminal device sending a first message on a first resource, the first message being used for requesting a first EDT; and the first terminal device receiving a feedback message of the first EDT sent by a network device, the feedback message of the first EDT comprising a first radio network temporary identifier (RNTI); wherein the first resource is one of a plurality of common PURs, the plurality of common PURs corresponding to a plurality of RNTIs comprising the first RNTI, and the first RNTI corresponding to the first resource or the first message comprising the first RNTI.

[0007] In a second aspect, a method for wireless communication is provided, including: receiving, by a network device, a first message on a first resource, the first message being used for a first terminal device to request a first EDT; and sending, by the network device, a feedback message of the first EDT to the first terminal device, the feedback message of the first EDT including a first RNTI; wherein the first resource is one of a plurality of common PURs, the plurality of common PURs corresponding to a plurality of RNTIs including the first RNTI, and the first RNTI being an RNTI corresponding to the first resource or an RNTI in the first message.

[0008] In a third aspect, an apparatus for wireless communication is provided, the apparatus being a first terminal device, and the apparatus including: a sending unit configured to send a first message on a first resource, the first message being used for requesting a first EDT; and a receiving unit configured to receive a feedback message of the first EDT sent by a network device, the feedback message of the first EDT including a first RNTI; wherein the first resource is one of a plurality of common PURs, the plurality of common PURs corresponding to a plurality of RNTIs including the first RNTI, and the first RNTI corresponding to the first resource or the first message including the first RNTI.

[0009] In a fourth aspect, an apparatus for wireless communication is provided, the apparatus being a network device, and the apparatus including: a receiving unit configured to receive a first message on a first resource, the first message being used for a first terminal device to request a first EDT; and a sending unit configured to send a feedback message of the first EDT to the first terminal device, the feedback message of the first EDT including a first RNTI; wherein the first resource is one of a plurality of common PURs, the plurality of common PURs corresponding to a plurality of RNTIs including the first RNTI, and the first RNTI being an RNTI corresponding to the first resource or an RNTI in the first message.

[0010] In a fifth aspect, a communication apparatus is provided, including a memory and a processor, the memory being configured to store a program, and the processor being configured to invoke the program in the memory to execute the method in the first aspect or the second aspect.

[0011] In a sixth aspect, an apparatus is provided, including a processor configured to invoke a program in a memory to execute the method in the first aspect or the second aspect.

[0012] In a seventh aspect, a chip is provided, including a processor configured to invoke a program in a memory, so that a device installed with the chip executes the method in the first aspect or the second aspect.

[0013] In an eighth aspect, a computer-readable storage medium is provided, having stored thereon a program, which causes a computer to execute the method according to the first aspect or the second aspect.

[0014] In a ninth aspect, a computer program product is provided, comprising a program, which causes a computer to execute the method according to the first aspect or the second aspect.

[0015] In a tenth aspect, a computer program is provided, which causes a computer to execute the method according to the first aspect or the second aspect.

[0016] The first terminal device in the embodiment of the present application requests the first EDT through the first message on the first resource determined based on the contention manner. The first resource corresponds to the first RNTI, or the first message includes the first RNTI. The feedback message sent by the network device indicating whether the first EDT is successful can include the first RNTI. As can be seen, based on the first RNTI, the network device can determine the first resource selected by the first terminal device and the access request, and perform the feedback about the first EDT, thereby reducing the conflict between the terminal devices. BRIEF DESCRIPTION OF DRAWINGS

[0017] FIG. 1 is a wireless communication system to which the embodiments of the present application are applied.

[0018] FIG. 2 is a flow diagram of EDT based on no RACH.

[0019] FIG. 3 is a flow diagram of a method for wireless communication according to an embodiment of the present application.

[0020] FIG. 4 is a flow diagram of a possible implementation of the method of FIG. 3.

[0021] FIG. 5 is a flow diagram of another possible implementation of the method of FIG. 3.

[0022] FIG. 6 is a diagram of an information structure of group signaling.

[0023] FIG. 7 is a flow diagram of another method for wireless communication according to an embodiment of the present application.

[0024] FIG. 8 is a diagram of a possible implementation of the method of FIG. 7.

[0025] FIG. 9 is a diagram of a structure of an apparatus for wireless communication according to an embodiment of the present application.

[0026] FIG. 10 is a diagram of a structure of another apparatus for wireless communication according to an embodiment of the present application.

[0027] FIG. 11 is a diagram of a structure of a communication apparatus according to an embodiment of the present application. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. For the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0029] The embodiments of the present application can be applied to various communication systems. For example, the embodiments of the present application can be applied to a global system of mobile communication (GSM) system, a code division multiple access (CDMA) system, a wideband code division multiple access (WCDMA) system, a general packet radio service (GPRS), a long term evolution (LTE) system, an advanced long term evolution (LTE-A) system, a new radio (NR) system, an evolved system of the NR system, an LTE-based access to unlicensed spectrum (LTE-U) system, an NR-based access to unlicensed spectrum (NR-U) system, a universal mobile telecommunication system (UMTS), a wireless local area networks (WLAN), a wireless fidelity (WiFi), a 5th-generation (5G) system. The embodiments of the present application can also be applied to other communication systems, for example, a future communication system. The future communication system may, for example, be a 6th-generation (6G) mobile communication system or a satellite communication system.

[0030] The conventional communication system supports a limited number of connections, which is easy to implement. However, with the development of communication technology, the communication system can not only support traditional cellular communication, but also support one or more types of other types of communication. For example, the communication system can support one or more of the following communications: device to device (D2D) communication, machine to machine (M2M) communication, machine type communication (MTC), enhanced MTC (eMTC), vehicle to vehicle (V2V) communication, and vehicle to everything (V2X) communication, and the like. The embodiments of the present application can also be applied to a communication system supporting the above communication modes.

[0031] The communication system in the embodiments of the present application can be applied to a carrier aggregation (CA) scenario, a dual connectivity (DC) scenario, and a standalone (SA) network deployment scenario.

[0032] The communication system in the embodiments of the present application can be applied to unlicensed spectrum. The unlicensed spectrum can also be considered as shared spectrum. Alternatively, the communication system in the embodiments of the present application can also be applied to licensed spectrum. The licensed spectrum can also be considered as dedicated spectrum.

[0033] The embodiments of the present application can be applied to a non-terrestrial network (NTN) system. As an example, the NTN system can be a 4G-based NTN system, an NR-based NTN system, an internet of things (IoT)-based NTN system, or a narrow band internet of things (NB-IoT)-based NTN system.

[0034] The communication system can include one or more terminal devices. The terminal device mentioned in the embodiments of the present application can also be referred to as user equipment (UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user equipment, etc.

[0035] In some embodiments, the terminal device can be a station (STATION, ST) in a WLAN. In some embodiments, the terminal device can be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA) device, a handheld device having wireless communication function, a computing device, or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a next-generation communication system (e.g., an NR system), or a terminal device in a future evolved public land mobile network (PLMN) network, etc.

[0036] In some embodiments, the terminal device can be a device that provides voice and / or data connectivity to a user. For example, the terminal device can be a handheld device having wireless connection function, an in-vehicle device, etc. As some specific examples, the terminal device can be a mobile phone, a Pad, a notebook computer, a palmtop computer, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc.

[0037] In some embodiments, the terminal device can be deployed on land. For example, the terminal device can be deployed indoors or outdoors. In some embodiments, the terminal device can be deployed on water surface, such as on a ship. In some embodiments, the terminal device can be deployed in air, such as on an airplane, a balloon, and a satellite.

[0038] In addition to the terminal device, the communication system can also include one or more network devices. The network device in the embodiments of the present application can be a device for communicating with the terminal device, which can also be referred to as an access network device or a radio access network device. The network device can be, for example, a base station. The network device in the embodiments of the present application can refer to a radio access network (RAN) node (or device) that accesses the terminal device to the wireless network. The base station can broadly cover various names in the following or be replaced by the following names, such as: Node B (NodeB), evolved Node B (eNB), next generation Node B (gNB), relay station, access point (AP), transmitting and receiving point (TRP), transmitting point (TP), master station MeNB, auxiliary station SeNB, multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. The base station can be a macro base station, a micro base station, a relay node, a donor node, or the like, or a combination thereof. The base station can also refer to a communication module, modem, or chip used in the aforementioned devices or apparatuses. The base station can also be a mobile switching center and a device that performs the function of a base station in D2D, V2X, M2M communication, a network side device in a 6G network, a device that performs the function of a base station in a future communication system, etc. The base station can support networks of the same or different access technologies. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network device.

[0039] The base station can be fixed or mobile. For example, a helicopter or a drone can be configured to act as a mobile base station, and one or more cells can move according to the location of the mobile base station. In other examples, a helicopter or a drone can be configured to act as a device that communicates with another base station.

[0040] In some deployments, the network device in the embodiments of the present application can refer to a CU or a DU, or the network device includes a CU and a DU. The gNB can also include an AAU.

[0041] By way of example and not limitation, in embodiments of the present application, a network device can have a mobile characteristic, for example, the network device can be a mobile device. In some embodiments of the present application, the network device can be a satellite, a balloon station. In some embodiments of the present application, the network device can also be a base station disposed at a location on land, water, etc.

[0042] In embodiments of the present application, a network device can serve a cell, and a terminal device communicates with the network device through a transmission resource (for example, a frequency domain resource, or a spectrum resource) used by the cell. The cell can be a cell corresponding to the network device (for example, a base station), and the cell can belong to a macro base station or a base station corresponding to a small cell. The small cell can include a metro cell, a micro cell, a pico cell, a femto cell, etc., and these small cells have the characteristics of small coverage and low transmit power, and are suitable for providing high-rate data transmission services.

[0043] By way of example, FIG. 1 is a schematic diagram of an architecture of a communication system provided in embodiments of the present application. As shown in FIG. 1, the communication system 100 can include a network device 110, which can be a device that communicates with a terminal device 120 (or a communication terminal, a terminal). The network device 110 can provide communication coverage for a specific geographic area, and can communicate with terminal devices located within the coverage area.

[0044] FIG. 1 exemplarily shows one network device and two terminal devices. In some embodiments of the present application, the communication system 100 can include multiple network devices, and each network device can include other numbers of terminal devices within its coverage, which is not limited.

[0045] In embodiments of the present application, the communication system shown in FIG. 1 can also include a mobility management entity (MME), an access and mobility management function (AMF), and other network entities, which are not limited in embodiments of the present application.

[0046] It should be understood that the devices with communication functions in the network / system in the embodiments of the present application can be referred to as communication devices. For example, the communication system 100 shown in FIG. 1, the communication devices can include the network devices 110 and the terminal devices 120 with communication functions, which can be the specific devices described above, and details are not described herein again; the communication devices can also include other devices in the communication system 100, such as network controllers, mobile management entities and other network entities, and the embodiments of the present application do not limit this.

[0047] For ease of understanding, some related technical knowledge related to the embodiments of the present application is introduced first. The following related technologies can be combined with the technical solutions of the embodiments of the present application as optional schemes, and all belong to the protection scope of the embodiments of the present application. The embodiments of the present application include at least part of the following contents.

[0048] In the development process of communication technology, reducing signaling overhead and power consumption has always been an important research topic. For example, in the 3rd generation partnership project (3GPP) release 15 (Rel-15), EDT function is introduced for NB-IoT and eMTC systems. The EDT function can enable a terminal device in a radio resource control (RRC) idle (IDLE) mode to directly transmit data through a message 3 (Msg3) in a random access procedure. That is, the terminal device does not need to convert from the RRC idle mode to the RRC connected (CONNECTED) mode when transmitting data, thereby reducing the signaling overhead and power consumption of the related communication devices. For another example, in the release 16 (Rel-16), the early transmission of uplink (UL) data is further enhanced by introducing the PUR mechanism. The PUR mechanism allows the eNB to configure a dedicated uplink resource for the terminal device. The uplink resource is, for example, a physical uplink shared channel (PUSCH) resource.

[0049] In some embodiments, EDT can be applied to a four-step random access procedure. Specifically, a terminal device and a network device can complete an EDT-based four-step random access procedure through message 1 (Msg1) to message 4 (Msg4). Illustratively, the terminal device and the network device transmit EDT-specific message 1, a random access response (RAR), an RRC early data request (RRC EarlyDataRequest) message (Msg3), and an RRC early data complete (RRC EarlyDataComplete) message (Msg4).

[0050] In some embodiments, a terminal device in an idle mode can transmit a UL transmission using a PUR configured by a network device without performing a random access procedure. For example, the terminal device can directly transmit an RRC EarlyDataRequest message and receive an RRC EarlyDataComplete message, that is, transmit message 3 and message 4. By skipping the transmission of message 1 and RAR in the random access procedure, the transmission efficiency of the uplink can be improved, and the power consumption of the terminal device can be further reduced.

[0051] In the above embodiments, EDT without performing a random access procedure can also be referred to as RACH-less EDT. The RACH-less EDT in the embodiments of the present application can be applied to an NTN cell and can also be applied to a terrestrial network (TN) cell. In comparison, it is more meaningful to introduce RACH-less EDT in an NTN.

[0052] First, compared with a TN cell, the coverage of an NTN cell is much larger. For example, an Internet of Things NTN must support a large number of capacity terminal devices. Further, an NTN usually has a very long round-trip time (RTT). Therefore, the cost of restarting the entire RACH procedure in an NTN is too high. After introducing RACH-less EDT, the transmission of message 3 is directly performed without message 1 / message 2, which can effectively save the signaling overhead caused by message 1 / message 2.

[0053] Secondly, the terminal device usually has global navigation satellite system (GNSS) capability, that is, the terminal device knows its own position before accessing the NTN cell. In addition, the terminal device can know the position of the satellite, for example, the terminal device can determine according to the ephemeris information broadcast in the system information block (SIB). Based on the position of the terminal device and the position of the satellite, the terminal device can determine the effective timing advance (TA) according to the two quantities. When the terminal device has an effective timing alignment value, the RACH-less EDT can be enabled.

[0054] In summary, when the purpose of access is achieved by RACH-less EDT in the NTN system, the signaling overhead and power consumption can be effectively reduced.

[0055] The application scenario and starting condition of RACH-less EDT have certain requirements. In other words, the terminal device in the cell that meets the condition can enable the RACH-less EDT to reduce the signaling overhead. In some embodiments, the application scenario of RACH-less EDT can be that the upper layer requests to establish or resume the RRC connection, or that the establishment or resume request is used for the initial call. In some embodiments, the starting condition of RACH-less EDT includes that the terminal device has an effective timing alignment value, and / or the size of the MAC protocol data unit (PDU) obtained at the media access control (MAC) layer is expected to be not greater than the transport block size (TBS) configured by the system for RACH-less EDT. The starting of RACH-less EDT needs to meet but is not limited to the above conditions.

[0056] In order to facilitate understanding, the flow of RACH-less EDT will be exemplarily described below in combination with FIG. 2. FIG. 2 is introduced from the perspective of the interaction between the terminal device and the network device. The terminal device can be a UE, and the network device can be a network side device of the NTN.

[0057] Referring to FIG. 2, in step S210, the terminal device sends RRC early data request (EarlyDataRequest) information to the network device. In the information, the resume identity (ID), establishment cause, and non-access stratum (NAS) dedicated information (dedicatedinfoNAS) are usually included.

[0058] At step S220, the network device feeds back, to the terminal device, an RRC EarlyDataComplete through a MAC control element (MAC CE) of a channel state information reference signal resource indicator (CSI-RS RI, CRI).

[0059] The procedure of RACH-less EDT is introduced above in combination with FIG. 2. In an actual communication system, if a terminal device is configured with PUR but does not need to initiate a PUR procedure, the preconfigured uplink resource will be wasted. In an NTN system, the problem is more obvious. There are a large number of terminal devices in an NTN cell, and it is difficult to configure dedicated uplink resources for all terminal devices. If uplink resources are preconfigured, a large number of terminal devices not performing uplink transmission will cause great waste. To solve this problem, multiple terminal devices can share uplink resources. As an example, PUR can be a shared common resource. For example, multiple terminal devices initiating RACH-less EDT can perform transmission of message 3 on the shared uplink resource to improve resource utilization efficiency and capacity.

[0060] However, sharing uplink resources for message 3 transmission can increase the risk of collision between different terminal devices, for example, multiple terminal devices can initiate RACH-less EDT and use the same time-frequency resource to transmit message 3 at the same time. If the collision rate is high, it will have a negative impact, such as increasing signaling overhead and terminal device power consumption. However, in NTN, especially NB-IoT on NTN, spectrum (also known as frequency resource) is scarce and expensive. Therefore, in these scenarios, efficient design and / or specification of RACH-less EDT such as message 3 transmission without message 1 is crucial.

[0061] In summary, in scenarios such as NTN, how terminal devices more efficiently perform RACH-less EDT is a technical problem worthy of study.

[0062] It should be noted that the above-mentioned problem of collision of shared resources of EDT due to long transmission delay of NTN system and large number of served terminal devices is only an example, and the embodiments of the present application can be applied to any type of communication scenario where the shared resources of EDT collide.

[0063] Based on this, the embodiment of the present application proposes a method for wireless communication. Through the method, the first terminal device can send a first message on a first resource to request a first EDT. In the communication process, the network device and the first terminal device can determine a first RNTI related to the first terminal device based on the configuration or the first resource related information. The first RNTI can be used to identify the first terminal device and the first message sent by the first terminal device. Based on different RNTIs, multiple terminal devices can share multiple common PURs including the first resource.

[0064] In some embodiments, the first EDT can include the transmission of uplink data or information when the first terminal device is in an idle state. For example, the first EDT can be replaced by a first RACH-less EDT, or a first RACH-less EDT.

[0065] As an example, the first EDT can be used to send an update message of TA.

[0066] As an example, the first EDT can be initiated for data transmission, or can be initiated for voice call, which is not limited herein.

[0067] As an example, the multiple TBS corresponding to the first EDT can be used to transmit multiple uplink data of different sizes.

[0068] As an example, the first EDT can be an NTN RACH-less EDT. For example, when the NTN RACH-less EDT is supported, the communication device can use a pre-configured orthogonal cover code (OCC) narrowband physical random access channel (NPRACH) resource to skip message 1 and message 2.

[0069] In the embodiment of the present application, "requesting the first EDT" can be replaced by "performing the first EDT", or "requesting access through the first EDT". That is, the first terminal device can directly perform the first EDT to represent the request for the first EDT. Alternatively, the first message can be used by the first terminal device to request access. The request for access can also be referred to as the request for RRC connection.

[0070] In some embodiments, the first terminal device can request the first EDT through the first message, or can directly perform the first EDT through the first message. When the first terminal device requests the first EDT through the first message, the first message can include the request information of the first EDT. When the first terminal device performs the first EDT through the first message, the first message can include the to-be-transmitted data corresponding to the first EDT.

[0071] In some embodiments, the first terminal device can also perform the first EDT at the same time of requesting the first EDT. That is, the first message can comprise the request information and the corresponding to-be-transmitted data of the first EDT.

[0072] The first resource is one of a plurality of common PURs. The plurality of common PURs refer to PURs configured by the network device as common resources that can be shared. As known from the foregoing, configuring the PURs as uplink resources shared by a plurality of terminal devices can avoid waste of resources. In some scenarios, the PURs are mainly used for transmission of PUSCHs, and thus the PURs can also be referred to as PUSCH resources. That is, the plurality of common PURs can be PUSCH resources that can be simultaneously used by a plurality of terminal devices.

[0073] In some embodiments, the plurality of common PURs can be all or part of time-frequency resources in one preconfigured resource pool, or time-frequency resources in a plurality of preconfigured resource pools, which are not limited herein. Exemplarily, the plurality of common PURs are at least time-frequency resources.

[0074] As an example, the plurality of preconfigured common PURs can be configured for each cell and shared by a plurality of terminal devices.

[0075] As an example, the plurality of common PURs can be PUR resources used for physical random access channels (PRACHs). For example, for EDTs supporting NTN no RACH, PUSCH resources corresponding to the PRACHs can be used.

[0076] In some embodiments, the plurality of common PURs can be configured according to the number of terminal devices in a cell, or according to the number of terminal devices sending requests, or according to the size of uplink resources.

[0077] In some embodiments, the network device can indicate the plurality of common PURs to the terminal device based on a plurality of manners. Optionally, the network device can actively send configuration information of the plurality of common PURs, or indicate the configuration information of the plurality of common PURs according to a request of the terminal device.

[0078] As an example, the network device can provide the plurality of common PURs and / or the configuration information of the plurality of common PURs via a SIB. For example, a broadcast channel in the SIB can be used to broadcast the configuration information of the plurality of common PURs.

[0079] As an example, the network side can send multiple common PURs and / or configuration information of multiple common PURs through RRC dedicated signaling (may also be referred to as dedicated signaling). The RRC dedicated signaling is, for example, an RRC connection release (RRCConnectionRelease) message.

[0080] As an example, the network device can broadcast the configuration of multiple common PURs in a SIB, or configure multiple common PURs using RRC release (RRCRelease). As an example, the network device can broadcast multiple common PURs in a SIB, and configure other information in RRCRelease. The other information is, for example, a TA timer (TAT), a TA, a cell RNTI (C-RNTI), an RRC message, and other downlink (DL) data.

[0081] As an example, when the terminal device initially accesses the network, if the random access is successful, the index of the multiple common PURs of the EDT can be carried in a SIB message, or can be carried in an RRC message in the random access process, or can be carried in DCI information.

[0082] As an example, the network device can send multiple common PURs and resource configuration information based on the request of the terminal device. For example, in an NTN system, a first terminal device can trigger a request for resource configuration to request the NTN to provide configuration information of multiple common PURs.

[0083] In some embodiments, the configuration of multiple common PURs can be used for a serving cell and / or a neighboring cell where the first terminal device is located. In some scenarios, although the PUR is a shared resource, it still needs to be specific to the terminal device, or specific to the cell. In an NTN system, once the satellite moves out of the current area and a new satellite joins the service, the configuration of the PUR will not work. Based on this, the configuration of multiple common PURs can be applicable in multiple cells, thereby avoiding the terminal device entering the RRC connected mode to obtain the configuration in each new cell.

[0084] As an example, the configuration of multiple common PURs can be applicable to the serving cell that provides the PUR configuration.

[0085] As an example, the configuration of multiple common PURs can be applicable to the serving cell that provides the PUR configuration and other cells beyond the serving cell.

[0086] As an example, the multiple common PURs are located in a PUR shared resource pool, or the multiple common PURs constitute a PUR shared resource pool.

[0087] In some embodiments, multiple common PURs can allow periodic occurrence. That is, the resource size of multiple common PURs can be repeated, especially when multiple common PURs are configured in SIB. Specifically, if the network side provides a common PUR with multiple repetition sizes, the corresponding conditions for the terminal device to select multiple common PURs need to be configured.

[0088] In some embodiments, if the configuration of multiple common PURs is provided in system information, the scheme in the embodiments of the present application is effective for all types of terminal devices including the terminal device accessing the network for the first time.

[0089] In some embodiments, the terminal device can select the uplink resource for the first EDT or perform the first EDT in multiple ways. Illustratively, the first terminal device can determine the first resource corresponding thereto according to the configuration of the network device. In this scenario, the network device needs to configure the corresponding first resource for multiple terminal devices in multiple common PURs. This way of determining the first resource can also be called a contention-free manner, or a contention-free manner. Illustratively, the first terminal device can directly select the first resource in multiple common PURs. In this scenario, there can be multiple terminal devices that select the first resource, and the network device needs to determine whether the first terminal device selects the first resource successfully and provide feedback. This way of determining the first resource can also be called a contention-based (or called contention) manner.

[0090] In some embodiments, based on the way the terminal device selects the uplink resource from multiple common PURs, multiple common PURs can be configured as contention-free shared (CFS) preconfigured UL resources (CFS PURs) and / or contention-based shared (CBS) preconfigured UL resources (CBS PURs).

[0091] As an example, multiple common PURs can include multiple CFS PURs, or multiple common PURs can be multiple CFS PURs. Since CFS PUR is contention-free, multiple terminal devices including the first terminal device determine the uplink resource based on the contention-free manner.

[0092] As an example, multiple common PURs can include multiple CBS PURs, or multiple common PURs can be multiple CBS PURs. Since CBS PUR is contention-based. Multiple terminal devices including the first terminal device can select resources based on a contention resolution scheme to determine the uplink resource.

[0093] As an example, the plurality of common PURs can include a plurality of CFS PURs and a plurality of CBS PURs. Illustratively, the plurality of terminal devices can be divided into two groups based on the manner of resource selection, and the uplink resources are determined based on different manners respectively. Illustratively, the plurality of terminal devices can preferentially select resources in the CFS PURs based on a contention-free manner. When the remaining resources of the CFS PURs are insufficient, the plurality of terminal devices select resources in the CBS PURs based on a contention manner. Illustratively, the plurality of terminal devices can preferentially select resources in the CBS PURs based on a contention manner. When the remaining resources of the CBS PURs are insufficient, the plurality of terminal devices select resources in the CFS PURs based on a contention-free manner.

[0094] In some embodiments, the first resource can be one of the contention-free PURs or one of the contention-based PURs. Regardless of the manner in which the first terminal device determines the uplink resource, the uplink resource is the first resource for sending the first message.

[0095] In some embodiments, if contention-based PURs are supported, the network device needs to configure one or more CBS PURs. If contention-free PURs are supported, the network device needs to configure one or more CFS PURs. For example, in an NTN cell, contention-based common PURs can be introduced for different coverage levels, coverage areas, and / or different carriers within the cell.

[0096] In some embodiments, when the first resource is a contention-free PUR, the first terminal device needs to send a resource request to determine the first resource corresponding thereto; when the first resource is a contention-based PUR, the network device needs to determine whether the terminal device contending for the first resource is the first terminal device and provide feedback. For ease of understanding, the following embodiments are described in detail.

[0097] Embodiment 1

[0098] In this embodiment, the first terminal device selects the first resource from the plurality of common PURs based on a contention resolution manner. That is, the first resource is one of the contention-based common PURs (CBS PURs). The first resource is used to send the EDT or the EDT request. For this manner, the network device does not know which terminal device will select which resource in the plurality of common PURs to send the EDT request.

[0099] To solve this problem, the embodiment of the present application proposes a method for wireless communication. When the first terminal device transmits the first message on the first resource, the network device can determine which terminal device the first EDT requested by the first message comes from based on the first RNTI. Wherein, the first RNTI can be related to the first resource, or carried in the first message. Based on this method, the network device can determine which terminal device the received EDT request comes from and feedback, thereby reducing the conflict between different terminal devices.

[0100] For ease of understanding, the method for wireless communication proposed by the embodiment of the present application is described in detail below in combination with FIG. 3. FIG. 3 is introduced from the perspective of interaction between the first terminal device and the network device. The first terminal device can be any one of the communication terminals described above, such as UE. The network device can be any one of the access network devices or core network devices described above, such as gNB or eNB.

[0101] In some embodiments, the first terminal device can be a terminal device that transmits uplink to the network device, or a terminal device that receives downlink from the network device, which is not limited here.

[0102] In some embodiments, the first terminal device can be a terminal in a network with long communication delay. Optionally, the first terminal device can be a terminal device in an NTN system. That is, the serving cell of the first terminal device is an NTN cell. Or, the first terminal device is a ground terminal in an NTN cell. As an example, the first terminal device can be a terminal in an NB-IoT system.

[0103] As an example, the first terminal device is located in the coverage area of a satellite. For example, the first terminal device is an NTN Internet of Things terminal.

[0104] In some embodiments, the first terminal device can be a terminal device that transmits sidelink to other terminal devices.

[0105] In some embodiments, the network device can be any one of the network side devices of a communication system. The communication system can be an NTN system, for example.

[0106] As an example, the network device can include a satellite in an NTN system, and the first terminal device is a terminal device in a cell served by the satellite. As an example, when the base station is deployed on the satellite, the first terminal device can directly communicate with the base station on the satellite. As an example, when the satellite is used as a relay, the first terminal device can communicate with the network device located on the ground through the satellite.

[0107] As an example, when the network device comprises a satellite, the first terminal device can be located in a service area of the satellite at the current time, to perform data transmission or reception through the satellite.

[0108] In some embodiments, the first terminal device is a terminal currently in an idle state (also referred to as an idle mode). That is, at the current time, the first terminal device is not in an RRC connected state with the network device.

[0109] In some embodiments, the first terminal device can be one of a plurality of terminal devices in a serving cell. The plurality of terminal devices can each perform the method provided in the embodiments of the present application. For example, the plurality of terminal devices can each send a first message requesting EDT.

[0110] Referring to FIG. 3, at step S310, the first terminal device sends a first message on a first resource. Correspondingly, the network device receives the first message on the first resource.

[0111] The first message can comprise different types of messages, or one or more types of information, which are not limited herein.

[0112] In some embodiments, the first message can be an uplink message in a random access procedure. For example, the first message is a message 3 in a RACH-less access procedure. In the RACH-less access procedure, the first terminal device skips message 1 transmission and message 2 reception in the random access procedure, and directly sends the message 3. Since the message 3 transmission skips the message 1 and the RAR, the first terminal device does not receive the RNTI information in the RAR before receiving the message 4, and cannot determine the transmission resource of the message 3 through the RAR.

[0113] As an example, the first message is a non-RACH message directly sent by the first terminal device to the network device in the idle state. Therefore, the first message can be a message of the first PUSCH transmission sent by the first terminal device for the first time.

[0114] The first message is used to request the first EDT, and therefore can comprise a corresponding request. In some embodiments, the first terminal device can send an early data request to the network device through the first message, to perform uplink data transmission in a scenario without establishing an RRC connection.

[0115] As an example, the first message can be used for the first terminal device to perform an upper layer establishment request, or to resume an RRC connection. For example, the first message can comprise an RRC connection resume request (RRCConnectionResumeRequest).

[0116] As an example, the first message can be used for the first terminal device to establish or resume a connection for originating a call.

[0117] As an example, the first message can comprise an early data request, e.g. RRC EarlyDataRequest.

[0118] As an example, the first message can comprise data that needs to be transmitted early. For example, the first terminal device can send UL data together with the RRC EarlyDataRequest or RRCConnectionResumeRequest in the first message.

[0119] As can be seen from the foregoing, the network device can configure a plurality of public PURs shared by a plurality of terminal devices. In order to facilitate identification of the first messages respectively sent by the plurality of terminal devices through the plurality of public PURs, the plurality of public PURs can correspond to a plurality of RNTIs respectively. It should be noted that a new RNTI is designed for the plurality of public PURs in the embodiments of the present application, so as to uniquely identify the transmission of the first message.

[0120] In some embodiments, the plurality of RNTIs are used to identify the EDT requests sent by the plurality of terminal devices or the plurality of public PURs, so the plurality of RNTIs can be a plurality of EDT-RNTIs or a plurality of PUR-RNTIs.

[0121] The plurality of RNTIs comprise a first RNTI, and the first RNTI is used by the network device to determine that the first EDT corresponds to the first terminal device. That is, when the network device receives the first EDT or the request of the first EDT, the network device can determine that the first EDT comes from the first terminal device according to the first RNTI, so as to perform feedback (through the feedback message of the first EDT) and implement contention-based resource allocation.

[0122] As an example, the first RNTI is a first EDT-RNTI, or the first RNTI is a first PUR-RNTI.

[0123] The first RNTI can be an RNTI corresponding to the first resource or an RNTI in the first message. That is, the first RNTI corresponds to the first resource, or the first message comprises the first RNTI. When the first RNTI corresponds to the first resource, the network device can determine that the terminal device requesting the first EDT is the first terminal device according to the first resource. When the first message comprises the first RNTI, the network device can determine that the terminal device selecting the first resource or requesting the first EDT is the first terminal device according to the first message.

[0124] As an example, the first RNTI can be used to identify the first resource, that is, the time-frequency resource for sending the first message.

[0125] In some embodiments, the first terminal device can determine the first RNTI in multiple ways. Optionally, the first terminal device can use two ways to obtain the RNTI of the message 4 related to the CBS PUR: through network (NW) configuration or through the first terminal device itself performing calculation determination. The network device feeds back the request or transmission of the first message about the first EDT through the RNTI.

[0126] As an example, the first terminal device can determine the first RNTI according to the configuration of the network device. Illustratively, the device on the network side can allocate the RNTI through the RRCConnectionRelease message. That is, the NW can allocate the EDT-RNTI specific to the first terminal device. The first terminal device can confirm the corresponding first RNTI according to the connection release message when in the connected state.

[0127] As an example, when the first terminal device determines the first RNTI according to the network configuration, the first terminal device can select the first resource based on the first RNTI. When the first RNTI is the first EDI-RNTI, multiple EDT-RNTIs including the first EDT-RNTI are associated with the indexes of multiple common PURs. That is, the network device configures which common PUR is used by which EDT-RNTI.

[0128] As an example, the first terminal device can calculate the first RNTI according to the configuration of the multiple common PURs. Illustratively, the network device can configure the multiple common PURs through the SIB, and the first terminal device can calculate the first RNTI by itself based on the configuration and monitor the physical downlink control channel (PDCCH) carrying the feedback message.

[0129] As an example, the first terminal device determines the first RNTI according to the configuration of the multiple common PURs and the first resource. Illustratively, the first RNTI is calculated and determined based on the PUSCH time-frequency resource (first resource) of the first message. Illustratively, when the base station configures the PUR shared resource pool, there is a corresponding EDT-RNTI for each used resource block. When the first terminal device transmits the first message through the first resource, the first EDT-RNTI is calculated and obtained according to the first resource and saved for monitoring.

[0130] In some embodiments, the network device can also determine the first RNTI in multiple ways. Optionally, after the network device receives the first message on the first resource, the network device can determine the first RNTI according to the first resource or the first message.

[0131] As an example, when the network device configures the first RNTI for the first terminal device, the first RNTI can be carried in the first message. After the network device receives the first message, it is determined that the first EDT comes from the first terminal device. Illustratively, after the first terminal device receives the first RNTI configured by the network device, it can select the first resource for sending the first message according to the configured first RNTI.

[0132] As an example, after the network device receives the first message on the first resource, it can determine the first RNTI according to the first resource. Illustratively, after the base station receives the message 3, it will also calculate the EDT-RNTI to obtain the first RNTI. The base station can use the first RNTI to scramble the cyclic redundancy check (CRC) of the PDCCH downlink control information (DCI) format 1_0 of the message 4 (feedback message including the first EDT). Only the terminal device that sends the first message on the time-frequency resource (first resource) identified by the first RNTI can decipher the DCI of this PDCCH.

[0133] In some embodiments, multiple common PURs can be used for multiple terminal devices. The first RNTI can be determined according to the position of the first resource in the multiple common PURs and / or the terminal device set in which the first terminal device is located.

[0134] As an example, when the first terminal device is terminal device j in terminal device set i, the first RNTI is: EDT-RNTI(i,j)=1+s id (i,j)+14×t id (i,j)+14×M(i)×f id (i,j)+14×M(i)×N(i)×ulcarrier,id;

[0135] wherein s id (i,j) represents the index of the symbol corresponding to the terminal device j in the multiple common PURs, t id (i,j) represents the index of the slot corresponding to the terminal device j in the multiple common PURs, f id (i,j) represents the index of the frequency domain resource corresponding to the terminal device j in the multiple common PURs, M(i) represents the number of slots of the terminal device set i, N(i) represents the number of frequency domain resources of the terminal device set i, and ulcarrier,id represents the index of the uplink carrier corresponding to the first message.

[0136] Optionally, the symbol in the above formula is an orthogonal frequency division multiplexing (OFDM) symbol.

[0137] Optionally, s id (i,j) is one of s id , 0≤s id < 14.

[0138] Optionally, M can be the maximum number of time slots corresponding to a plurality of terminal device sets, t id (i,j) is one of t id , 0≤t id < M.

[0139] Optionally, N is the maximum number of frequency domain resources, f id (i,j) is one of f id , 0≤f id < N.

[0140] Optionally, for a normal uplink (NUL) carrier, the value of ulcarrier, id is 0; for a supplementary uplink (SUL) carrier, the value of ulcarrier, id is 1.

[0141] In some embodiments, the first terminal device is one of a plurality of terminal devices requesting EDT within an NTN cell. Since the number of terminal devices within the NTN cell is very large, the plurality of terminal devices requesting EDT or the plurality of terminal devices within the cell can be divided into a plurality of terminal device sets. The plurality of RNTIs including the first RNTI can be related to the plurality of terminal device sets. That is, dividing the plurality of terminal devices into a plurality of terminal device sets can facilitate the terminal device and the network device to better determine the corresponding RNTI.

[0142] In some embodiments, the plurality of terminal device sets can be determined according to one or more of the following information: the service type of the plurality of terminal devices; the service time of the plurality of terminal devices; the location information of the plurality of terminal devices and / or the plurality of sub-areas of the NTN cell.

[0143] As an example, the first RNTI configured by the network device is related to the terminal device set in which the first terminal device is located. The terminal device set in which the first terminal device is located is determined according to one or more of the following information: the service type of the first terminal device; the service time of the first terminal device; the location information of the first terminal device and / or the plurality of sub-areas of the NTN cell.

[0144] For ease of understanding, the following is an example of multiple EDT-RNTIs, combined with multiple implementation modes.

[0145] As an implementation mode, the terminal device set in which the first terminal device is located can be determined according to the service type of the first terminal device. In this scenario, the network device divides the terminal device set according to the service type of the multiple terminal devices. Correspondingly, the network side can configure the EDT-RNTI with specific purpose for different terminal device sets. For example, all EDT-RNTIs are divided into multiple groups, and each group corresponds to a type of service. When a type of service uses an EDT-RNTI group, the EDT-RNTI specific to the service type can save the resource of the network device for blind decoding of multiple first messages. Taking message 3 as an example, the network device does not know which terminal device sends the received message 3, but the network device knows the service type of the terminal device. In this implementation mode, the network device only needs to use the EDT-RNTI group corresponding to the service type to blind decode the received message 3, instead of using all EDT-RNTIs for blind decoding.

[0146] As another implementation mode, the terminal device set in which the first terminal device is located can be determined according to the service time of the first terminal device. The service time of the first terminal device can represent the remaining time of the first terminal device in the current service or the remaining service time of the current satellite. The network device can set multiple service time thresholds, thereby dividing the multiple terminal devices into multiple terminal device sets. The network device can allocate an EDT-RNTI group according to the service time of each terminal device set. When the terminal device set in which the first terminal device is located corresponds to a shorter service time, the first terminal device can use the time-frequency resource with an earlier time domain position.

[0147] As yet another implementation mode, the terminal device set in which the first terminal device is located can be determined according to the location information of the first terminal device and / or multiple sub-areas of the NTN cell. The NTN cell can be divided into multiple sub-areas (also referred to as self-cells). In the NTN cell, different sub-area locations have different distances from the cell edge. Exemplarily, multiple terminal devices with similar locations can be divided into a terminal device set. Exemplarily, multiple terminal devices in the same sub-area can be divided into a terminal device set. That is, there are as many terminal device sets as sub-areas. Each sub-area sets a region ID. One region ID is a group of terminal devices, and each group of terminal devices is allocated a group of EDT-RNTIs.

[0148] In the foregoing implementation manner, the NTN cell is divided into a plurality of sub-areas in a circular ring manner. The network device can group a plurality of terminal devices according to IDs of the sub-areas and positions of the terminal devices, and generate a set of EDT-RNTIs for each group of terminal devices.

[0149] In the foregoing implementation manner, a plurality of common PURs are respectively used for terminal devices in a plurality of sub-areas. Therefore, the plurality of sub-areas can respectively correspond to a plurality of common PUR sets. Sizes of the plurality of common PUR sets are determined according to a number of the plurality of sub-areas, and / or distances between each sub-area in the plurality of sub-areas and an edge of the NTN cell. Because the NTN has a large coverage range and area, the NTN can implement resource multiplexing of a plurality of terminal devices on the basis of sharing a PUR based on the plurality of sub-areas. The plurality of common PURs can be divided according to the sub-areas to form the plurality of common PUR sets. The common PUR corresponding to the sub-area is only used by terminal devices in the sub-area.

[0150] As an example, when the number of sub-areas is large, sizes of each common PUR set in the plurality of common PUR sets are relatively small.

[0151] As an example, when a distance between a certain sub-area and an edge of the NTN cell is relatively large, a common PUR set corresponding to the sub-area is small.

[0152] As an example, the plurality of common PUR sets can be represented as M(i) described in the foregoing. A size of M(i) can be related to an ID of a corresponding sub-area. The plurality of common PURs can be first evenly divided according to the number of the area IDs, and then each area divides M(i) into M(i) slots. average A size of M(i) of each group can be M(i) = (1 / Q) x M average ; where Q represents an expansion factor, and Q is a rational number. A value of Q is 1, indicating that the resources are evenly divided.

[0153] As an example, the common PUR set corresponding to each sub-area can be sent to all terminal devices in the NTN sub-area in the form of groupcast. For example, the NTN can send information about the sub-area ID to all terminal devices through a broadcast message, and the terminal devices can determine in which sub-area they are located through GNSS positioning information. As an example, a value of the area ID can be {1, 2, 3, 4, …}. The larger the value of the area ID, the closer to the edge of the NTN satellite coverage, and the smaller the value of M(i).

[0154] In some embodiments, the network device can group the EDT-RNTIs directly or based on the specific grouping of terminal devices. Optionally, when grouping the RNTIs directly, the multiple RNTIs can be divided into multiple RNTI sets. Optionally, the multiple RNTI sets can correspond to multiple terminal device sets respectively.

[0155] As an example, when the first RNTI is one of the first RNTI set in the multiple RNTI sets, the first message can include an identification of the first RNTI set. The identification can facilitate the network device to perform blind decoding through the RNTIs in the first RNTI set.

[0156] As an example, the network device can first assign a group EDT-RNTI to a group of terminal devices (e.g., based on the same service type), and the EDT-RNTIs of the terminal devices in the group can be determined based on the group EDT-RNTI. For example, the EDT-RNTIs are divided into G groups, where G is a positive integer. Each group can have a group identification, and the EDT-RNTI(i) based on the group identification can have X group members, where i is a positive integer from 1 to G. The identification of the X group members can be EDT-RNTI(i)1, EDT-RNTI(i)2, EDT-RNTI(i)3, …, EDT-RNTI(i)X respectively. X .

[0157] In the above embodiments, multiple terminal devices can request access at the same time. If the first terminal device fails to send the first message with the EDT-RNTI(i)1, the first terminal device can send the first message based on the EDT-RNTI(i)2, and sequentially request access in this order. If the first terminal device succeeds in sending the first message with the EDT-RNTI(i)2, the base station will decode the message with all the indices in the EDT-RNTI(i). Since the decoding is only within the group, the base station can quickly perform blind decoding on the first message.

[0158] In some embodiments, the first RNTI can be determined according to one or more of the following parameters: the ID of the first terminal device, the cell RNTI (C-RNTI), and the temporary mobile subscription identifier (TMSI). The network device or the first terminal device can calculate the first RNTI according to these parameters. It should be understood that the first RNTI can also be determined according to other parameters.

[0159] As an example, the first RNTI can be determined according to an ID of the first terminal device or a TMI. Illustratively, the first terminal device can calculate the first RNTI according to its own ID, and carry the first RNTI in the first message.

[0160] As an example, the first RNTI can be determined according to a C-RNTI. Illustratively, the first terminal device reserves the C-RNTI within a time T max after transitioning from the RRC connected state to the RRC idle state. That is, if the first terminal device stays in the idle state for more than T max , the C-RNTI will not be stored. Within T max , the first message can carry the C-RNTI MAC CE. Outside T max , the first message does not carry the C-RNTI MAC CE. Illustratively, the first terminal device sets a timer T max . When the first terminal device receives the RRC release message, the timer T max is started and the C-RNTI is reserved. The first message can carry the C-RNTI, and the downlink feedback sent by the network device can use the C-RNTI to calculate the first RNTI, and use the PDCCH scrambled by the first RNTI to indicate the result of contention resolution.

[0161] Illustratively, after T max expires, the first terminal device discards the stored C-RNTI. Subsequently, when transitioning from the RRC idle state to the RRC connected state, the first message is sent using the first RNTI. The first RNTI cannot be calculated by the C-RNTI, and the downlink feedback sent by the network device uses the first RNTI to indicate the result of contention resolution.

[0162] Continuing to refer to FIG. 3, at step S320, the first terminal device receives a feedback message of the first EDT sent by the network device.

[0163] The feedback message of the first EDT is used to indicate whether the first EDT or the first EDT request is successful. In some embodiments, when the first terminal device requests the first EDT, the feedback message needs to be waited for. In some embodiments, after the first terminal device directly sends the data to be transmitted corresponding to the first EDT in the first message, the feedback message also needs to be waited for. For example, after the first terminal device sends the UL data together with the early data request or the RRC connection resume request, it cannot be considered that the EDT is successfully completed. Only after the network device successfully receives the UL data according to the RRC message, it can be considered that the first EDT is successful.

[0164] As an example, the feedback message of the first EDT is used to indicate the result of contention resolution.

[0165] As an example, the feedback message of the first EDT can be carried in PDCCH (DCI), which is monitored by the first terminal device.

[0166] In some embodiments, the feedback message of the first EDT can be any one or more information received by the first terminal device. As an example, the feedback message of the first EDT can be one or more of the following: RRC EarlyDataComplete; RRC ConnectionRelease; ContentionResolution; positive acknowledgement (ACK) from layer 1 (L1) and / or layer 2 (L2).

[0167] In some embodiments, the feedback message of the first EDT is determined according to the type of the first message. As an example, when the first message requesting the first EDT is RRC EarlyDataRequest, the feedback message can be RRC EarlyDataComplete. As an example, when the first message is RRCConnectionResumeRequest, the feedback message can be RRCConnectionRelease.

[0168] As an example, the first terminal device considers the first EDT or the first EDT request to be successful only when it receives the RRC EarlyDataComplete or RRCConnectionRelease message.

[0169] As an example, ContentionResolution includes Msg4 ContentionResolution. When the first message is message 3, the feedback message of the first message can be Msg4 ContentionResolution. If the first RNTI carried by Msg4 ContentionResolution is consistent with that reported by the first terminal device in message 3, the first terminal device can consider that it has successfully sent the EDT data.

[0170] In some embodiments, when the first EDT is successful, the network device can also terminate the EDT process by an ACK without data. The ACK can be L1 / ACK or L2 / ACK. As an example, in the PUR shared resource pool, the network device can terminate the EDT process by sending L1 / ACK, L2 / ACK of the TA command (TAC) or RRC response message without data.

[0171] In some embodiments, the first terminal device can receive a feedback message of the first message based on a first timer. The first timer can also be referred to as a contention resolution timer. Illustratively, the first terminal device starts the first timer after sending the first message; the first timer is terminated after receiving the feedback message of the first message.

[0172] For the convenience of understanding, the following will be exemplarily explained in combination with FIG. 4. FIG. 4 is introduced from the perspective of a terminal device and a network device. The terminal device in FIG. 4 can be the first terminal device, and the first RNTI can be the EDT-RNTI. The terms explained in the foregoing will not be repeated here.

[0173] Referring to FIG. 4, in step S410, the terminal device sends an RRC early data request to the network device. The request can be the first message. Compared with step S210 in FIG. 2, the request can further include the EDT-RNTI corresponding to the terminal device in addition to the resume ID, the establishment cause, and the NAS dedicated information. Step S420 is the same as step S220 in FIG. 2, and will not be repeated here. As can be known from FIG. 4, after step S410 is performed, the terminal device starts the contention resolution timer, and the timer stops timing when step S420 is performed.

[0174] As can be known from FIG. 4, the contention resolution timer can facilitate the terminal device to monitor the feedback message sent by the network device and timely perform fallback. Within the Mac-contentionResolution Timer time, if the EDT-RNTI carried in the Msg4 ContentionResolution message received by the terminal device is consistent with the EDT-RNTI reported in the early data request, the terminal device can consider that the EDT data has been successfully sent. Otherwise, the terminal device considers that the current request fails, and accesses again according to the rules described in the foregoing.

[0175] In some embodiments, if the first EDT is unsuccessful, the first terminal device determines whether to perform a random access procedure. Illustratively, if the first terminal device does not receive the first EDT or an indication that the first EDT request is successful, the first terminal device can continue to send the first message to request the first EDT or perform the first EDT. Illustratively, if the first terminal device does not receive the first EDT or the indication that the first EDT request is successful within the set time of the first timer, the first terminal device falls back to a normal random access procedure and performs data transmission in a normal flow. That is, the first terminal device gives up the current early data request or the EDT.

[0176] In some embodiments, the first resource can be used for the first terminal device set to request the EDT. As can be known from the foregoing, the first RNTI can be associated with the transmission resource (the first resource) of the first message. Taking the message 3 as an example, if multiple terminal devices send the message 3 on the same resource, the responses (feedback messages) of the multiple terminal devices can be multiplexed in a single msg4 message. That is, the network device can send one “multiplexed msg4” to multiple terminal devices, instead of sending a single msg4 to each terminal device respectively.

[0177] As an example, the network device can perform multiplexing transmission of feedbacks corresponding to multiple terminal devices through a single physical downlink shared channel (PDSCH).

[0178] For ease of understanding, the multiplexing process of feedbacks of multiple terminal devices is exemplarily described below in combination with FIG. 5. FIG. 5 schematically introduces the interaction between two terminal devices and the network device. The two terminal devices are terminal device 1 and terminal device 2 respectively.

[0179] Referring to FIG. 5, in step S510, the terminal device 1 and the terminal device 2 respectively send the RRC early data request and start the contention resolution timer. The content in the request is the same as that in step S410 of FIG. 4, which is not described herein again.

[0180] In step S520, the network device can simultaneously feed back information to the terminal device 1 and the terminal device 2 through one feedback message. As shown in FIG. 5, the feedback message sent by the network device contains the msg4 of the terminal device 1 and the msg4 of the terminal device 2.

[0181] As an example, the network device can schedule multiple msg4s in a single MAC PDU. The multicast msg4 (multiplexing of msg4s of multiple terminal devices) scheduled by a single DCI or multiple msg4s can be a solution.

[0182] In some embodiments, since the number of terminal devices in the NTN system can reach tens of thousands, when multiple terminal devices synchronously send the first message based on area grouping / service type, the feedback message of the multiple first messages can be a group message. That is, the multiple feedback messages corresponding to the multiple terminal devices can be sent through one group signaling message.

[0183] As an example, a group message can be used to send feedback messages of all the terminal devices in a terminal device set requesting EDT. The terminal device set can be referred to as a first terminal device set. The feedback message of the first terminal device is exemplarily one of the group messages. The group message includes feedback messages of part or all of the terminal devices in the first terminal device set requesting EDT, including the first terminal device.

[0184] As an example, a group message is established for all the terminal devices with EDT-RNTI in the initiation message 3. The group message includes feedback messages of all the terminal devices sending EDT-RNTI Msg3. The group message is used to send to all the terminal devices in the group.

[0185] As an example, in an NTN cell, the moving speed of the terminal device can be considered as almost static relative to the moving speed of the satellite, especially for the Internet of Things terminal. Therefore, the network device can establish a group for each sub-area. The group can be established based on temporary mobile group identifier (TMGI), session ID, group RNTI (G-RNTI) and semi-persistent scheduling G-RNTI (SPS G-RNTI), configuration information of a service data adaptation protocol (SDAP) entity, configuration information of a packet data convergence protocol (PDCP) entity, configuration information of a radio link control (RLC) entity, and physical layer configuration information.

[0186] As an example, in order to receive a group message, the terminal device can perform the same network access procedure as unicast and enter the same state as after unicast network access. In the physical layer, the reception of multicast (packet transfer mode (PTM)) has only one step: the terminal device obtains the configuration information of the blind detection multicast broadcast service traffic channel (MTCH) through RRC signaling. According to the configuration information, the blind detection PDCCH obtains the scheduling information of the MTCH. According to the MTCH scheduling information, the multicast data is obtained from the multicast transport channel (MTCH / PDSCH) carried on the PDSCH.

[0187] As an example, in order to receive the multiplexed group message, the terminal device can perform a normal network access procedure. In the RRC connected state, the terminal device can obtain the configuration information of the group to which it belongs by blind detection of RRC signaling. The configuration information of the group to which it belongs, such as group ID, TMSI of the group, and the like, is stored in the terminal device and the base station, and is not released over time, unless the configuration information of the group is reacquired based on re-random access. According to the group configuration information, the PDCCH is monitored to obtain the scheduling information of the group. According to the group scheduling information, the terminal device in one area ID / group ID can receive the group message containing multiple feedback messages.

[0188] In some embodiments, the design of the structure of the group message needs to consider the correspondence between the multiple terminal devices and the multiple feedback messages. As an example, the group message can carry the MAC service data unit (SDU) in.

[0189] Exemplarily, when the first terminal device belongs to the first terminal device set, the group message including the first EDT feedback message can be carried in the first MAC SDU. The reserved bits in the header of the first MAC SDU can be used to indicate the service type corresponding to the first terminal device set or the identifier of the sub-area where the first terminal device set is located.

[0190] For ease of understanding, the following takes one possible structure of the MAC SDU as an example to exemplarily illustrate the group signaling message in combination with FIG. 6. The MAC SDU in FIG. 6 can be the first MAC SDU, and MAC EDT-Rn represents the response to the terminal device n. As shown in FIG. 6, the MAC SDU includes a MAC header, responses of n terminal devices, and padding.

[0191] Referring to FIG. 6, in the MAC header, there are a total subheader and n subheaders corresponding to n terminal devices. The n subheaders are subheader 1, subheader 2, …, and subheader n respectively. Among them, the total subheader includes the fields E / T / R / R / BI, and the other subheaders include the fields E / T / EDT-RNTI n. Among them, R is a reserved bit. The meanings of the fields in FIG. 6 are as follows.

[0192] E: The extension field is a flag indicating whether the MAC subPDU containing this MAC subheader is the last MAC subPDU in the MAC PDU. If the E field is 1, there is at least one MAC subPDU behind; if the E field is 0, it indicates that this is the last MAC subPDU in the MAC PDU.

[0193] T: Type field is a flag indicating whether the MAC subheader contains EDT identification or backoff indicator (BI). If T field is 0, it means there is no BI in the subheader and no overload; if T field is 1, it means there is no satisfying all terminal devices in the total subheader, and in each subsequent subheader, it means there is no EDT-RNTI for the corresponding terminal device.

[0194] R: Reserved field, i.e. reserved resource, can be set as NTN area ID field or service type identification.

[0195] BI: Backoff field identifies the overload situation in the cell, which is 4 bits in size and can represent 16 possible indexes.

[0196] EDT-RNTI: EDT field is used to identify the EDT-RNTI corresponding to each terminal device. The size of EDT-RNTI field is 16 bits.

[0197] In some embodiments, the first message can be transmitted based on a first TA value. That is, the first terminal device performs uplink transmission of the first message based on the first TA value. As an example, the first TA value is not adjusted by any NW. The first TA value should be a valid timing alignment value for uplink transmission.

[0198] As an example, in order to support direct transmission of message 3 in the deployment of low earth orbit (LEO) satellites, the first terminal device needs to estimate whether the TA value is accurate enough for the first message 3 or the first PUSCH transmission.

[0199] In some embodiments, the first TA value can be pre-compensated for the current TA to improve accuracy. Illustratively, the first terminal device can perform transmission of the first message based on the pre-compensated TA. Therefore, the first TA value can also be referred to as a compensation value of the TA.

[0200] As an example, the current TA can be a TA value before pre-compensation by the first terminal device. For example, the current TA can be determined by the first terminal device based on the currently stored TA. When multiple TA values are stored, the first terminal device can select the most recent stored TA as the current TA, or select the maximum value, minimum value or average value of the stored TA as the current TA.

[0201] In some embodiments, the first TA value can be pre-compensated according to one or more of the following parameters: a duration that the first terminal device stays in an idle state; a TA value stored by the first terminal device at a previous TA adjustment; a maximum TA pre-compensation value when the first terminal device last time stays in a connected state; a path loss and a Doppler frequency offset when the first terminal device receives configuration information of multiple public PURs. The parameter for pre-compensating the first TA value determined according to the above parameters can also be referred to as a compensation value of the first TA value.

[0202] As an example, the first TA value can be determined based on the duration of staying in the idle state. The first terminal device can determine the duration of staying in the RRC idle state, i.e., the idle state duration. For example, the duration can be used to determine a calculation factor of the current TA. The first terminal device can determine the first TA value by the current TA and the calculation factor.

[0203] As an example, the first TA value can be determined based on the TA value stored at the previous TA adjustment. The TA value stored at the previous TA adjustment refers to the TA value stored by the first terminal device at the last TA adjustment (e.g., in the RRC connected state). For example, the first terminal device can configure a corresponding compensation parameter to compensate the TA value to determine the first TA value.

[0204] As an example, the first TA value can be determined based on the duration of staying in the idle state and the TA value stored at the previous TA adjustment. For example, when the duration of staying in the idle state of the first terminal device is T delay , and the TA value stored at the previous TA adjustment is T TA , the first TA value or the compensation value of the first TA value can be T delay × T TA In the NTN system, T delay × T TA directly as the first TA value, the parameter can be smaller than the maximum TA value estimated based on the maximum Doppler frequency offset in the NTN cell.

[0205] As an example, the first TA value can be determined according to the maximum TA pre-compensation value when the first terminal device last time stays in the connected state. That is, the first terminal device can perform initial compensation based on the maximum TA pre-compensation value in the last connection when performing TA pre-compensation.

[0206] As an example, the first TA value can be determined according to the path loss and Doppler frequency offset when the first terminal device receives the configuration information of the plurality of common PURs. The configuration information of the plurality of common PURs is, for example, the configuration parameters related to the common PURs issued by the network device. Illustratively, the first terminal device can trigger a PUR request. When the network issues the PUR configuration to the first terminal device, the first terminal device can estimate the path loss and estimate the size of the Doppler frequency offset according to the signaling issued by the network, so as to adjust the value of the TA.

[0207] The method for determining the solution of the first resource based on contention is described above in combination with FIGS. 3 to 6. Based on the method, the network device does not need to configure the PUR for each terminal device, and can be applied to the EDT scenario with a large number of terminal devices in a cell such as an NTN.

[0208] Embodiment 2

[0209] In this embodiment, the first terminal device selects the first resource from the plurality of common PURs based on a contention-free manner. That is, the first resource is one of the plurality of common PURs based on contention-free (CFS PUR). As described above, when the first resource is determined based on contention, multiple terminal devices may select the same resource to send the EDT or the EDT request. In this scenario, it may cause that some of the plurality of common PURs need to send a lot of messages, and some of the plurality of common PURs do not need to send messages.

[0210] To solve this problem, the embodiment of the present application further provides a method for wireless communication. In the method, the network device configures the first resource for the first terminal device to send the EDT or the EDT request. Through the method, the plurality of terminal devices can send the EDT request on the configured resource respectively, and the network device can know which terminal device the received EDT request comes from, and can also avoid waste of resources.

[0211] To facilitate understanding, the method for wireless communication is specifically described below in combination with FIG. 7. FIG. 7 is also introduced from the perspective of the interaction between the first terminal device and the network device. For brevity, the terms already explained in FIG. 3 will not be repeated.

[0212] Referring to FIG. 7, in step S710, the first terminal device receives the first configuration information sent by the network device.

[0213] The first configuration information can be carried in the SIB or the RRC dedicated signaling. That is, the network device can provide the corresponding configuration information to each terminal device based on the dedicated RRC signaling, or can provide the configuration information through the broadcast signaling.

[0214] As an example, the RRC dedicated signaling can comprise an RRC connection release message. For instance, the first configuration information can be carried by an RRC connection release message sent by the network device before the first terminal device enters the idle state, so as to be received by the first terminal device. As another example, the configuration of the plurality of common PURs can be sent to the terminal device through an RRCConnectionRelease message.

[0215] The first configuration information is used for the first terminal device to determine the first resource. As described above, the first resource is used for sending the first message, and the first message is used for requesting the first EDT or performing the first EDT. The first resource is one of the plurality of common PURs.

[0216] As an example, when the network device releases the first terminal device to the RRC idle state, the network device configures the first resource to the first terminal device based on the plurality of common PUR configuration request, the subscription information, and / or the local policy.

[0217] It should be noted that in FIG. 7, the plurality of common PURs are used for data transmission in the NTN. That is, the embodiment is used for wireless communication of the NTN system. When the terminal device in the NTN cell supports the NTN RACH-less EDT, the plurality of common PURs can be used.

[0218] In some embodiments, the first configuration information can be used to indicate one or more of the following: a first RNTI corresponding to the first terminal device; a resource of a demodulation reference signal (DMRS) corresponding to the first terminal device; an allocation manner of the plurality of common PURs; a resource index in the plurality of common PURs. As described above, the first RNTI can be an EDT-RNTI.

[0219] As an example, the DMRS corresponding to the first terminal device can be a DMRS dedicated to the first terminal device.

[0220] As an example, the network device can pre-configure a dedicated RNTI and / or DMRS resource for each terminal device. In one specific common PUR, a plurality of terminal devices can simultaneously send a message 3. The network device can decode one or more message 3s from different terminal devices. The network device can distinguish the terminal devices through the EDT-RNTI (used for data scrambling and CRC scrambling) embedded in the message 3 and / or the dedicated DMRS. Accordingly, the network device can send a message 4 using the EDT-RNTI dedicated to the terminal device.

[0221] As an example, the network device can provide an allocation manner of the plurality of common PURs, so as to facilitate the terminal device to determine the corresponding uplink resource.

[0222] As an example, the network device can provide resource indices in multiple common PURs for each terminal device, so that the terminal device determines the corresponding uplink resource according to the index in the corresponding configuration information. Illustratively, the network device can configure some different resource information for different terminal devices, while other resource information can be the same for all terminal devices. In this scenario, the network device can provide multiple sets of common resource information through SIB, and then indicate the terminal device-specific resource set index through dedicated signaling.

[0223] Continuing to participate in FIG. 7, at step S720, the first terminal device transmits a first message on the first resource. Step S720 is the same as step S610 in FIG. 6. The difference is that the first resource in FIG. 7 is configured by the network device to the first terminal device, and no other terminal device uses this resource, so the first terminal device can not wait for a feedback message.

[0224] In some embodiments, the first message can include a first RNTI and / or a DMRS to facilitate identification by the network device. The DMRS can be a DMRS dedicated to the first terminal device.

[0225] In some embodiments, the first configuration information can be configured based on a configuration request of the first terminal device. The configuration request can also be referred to as a PUR configuration request. Illustratively, the configuration request sent by the first terminal device to the network device can be used to request the first configuration information. That is, after the network device configures multiple common PURs, it does not configure the corresponding uplink resource for all terminal devices in the cell.

[0226] In some embodiments, the configuration request can include one or more of the following information: capability information of the first terminal device; traffic type of the first terminal device; and configuration related to whether the first terminal device enables EDT.

[0227] As an example, the first terminal device can directly send a configuration request for the uplink resource to make an explicit request. For example, the first terminal device can directly inform the network device that it will send the first message and request the network device to configure the first resource.

[0228] As an example, the first terminal device can implicitly request the network device to configure the uplink resource. For example, the first terminal device can enable or disable the configuration of RACH-less EDT. When the configuration request contains the enablement or disablement information of EDT, the network device can determine whether to configure the uplink resource according to whether EDT is enabled, and send the first configuration information.

[0229] Exemplarily, the network device can determine whether to send the first configuration information according to whether the first terminal device enables the EDT-related configuration. When the first terminal device enables the RACH-less EDT configuration, the network device can configure the first resource for the first terminal device and send the first configuration information. When the first terminal device disables the RACH-less EDT configuration, the network device does not configure the uplink resource for the first terminal device, and thus does not send the first configuration information.

[0230] Exemplarily, the first terminal device can use its own capability information to support the function of enabling or disabling the EDT configuration. If the capability information of the first terminal device shows that the first terminal device does not have the function of enabling the EDT configuration, the network device does not configure the uplink resource for the first terminal device, and thus does not send the first configuration information.

[0231] In some embodiments, the configuration request sent by the first terminal device can further include a first indication. The first indication is used to indicate that the EDT-related transmission enables ACK or negative acknowledgement (NACK) feedback. The first indication is, for example, “RRC ACK”.

[0232] As an example, the EDT-related transmission can include each interaction between the terminal device and the network device in the EDT transmission process.

[0233] As an example, the EDT-related transmission can include all subsequent PUR events after the first indication is sent.

[0234] As an example, in the NTN system, when the first terminal device sends the RACH-less EDT in the CFS PUR scenario, the first terminal device can send an indication “RRC ACK” in the PUR configuration request. The indication can be applied to all subsequent PUR events configured based on the PUR Configuration. For example, ACK / NACK is sent in each subsequent interaction to indicate whether the information is received.

[0235] In some embodiments, the network device can allocate a common PUR for each terminal device that sends a configuration request. Exemplarily, when the NTN cell in which the first terminal device is located includes multiple terminal devices that request EDT, multiple common PURs are allocated to the multiple terminal devices. Exemplarily, the first configuration information can be used to indicate multiple resources corresponding to the multiple terminal devices respectively. That is, the first configuration information can simultaneously indicate multiple uplink resources used by the multiple terminal devices to perform the first EDT or request the first EDT. Exemplarily, when the multiple common PURs are allocated to each terminal device that requests the resource based on the base station, the multiple common PURs can be allocated according to the service type of the terminal device.

[0236] In some embodiments, the network device can allocate resources according to the resources requested or required by the plurality of terminal devices.

[0237] As an example, the resources requested by the plurality of terminal devices can be the same, or the network device can allocate the same size of resources for each terminal device. For example, when the resources requested by each terminal device are the same, the plurality of common PURs can be equally divided. In this scenario, the size of the transport block (TB) corresponding to the transmission data in all EDTs can be set to be the same. If the size of the transport block in a certain EDT is not enough, zero padding can be performed to achieve the same TB size.

[0238] As an example, the plurality of terminal devices can have different sizes of resource requirements. For example, the network device can allocate resources according to the sizes of the resources requested by the plurality of terminal devices. For example, the number of resources that can be allocated in the plurality of common PURs is R (R is a positive integer), and there are K (K≤M) terminal devices that simultaneously apply for and are admitted to use the EDT PUR. The number of resources required by each of the K terminal devices can be represented as S i . The network device can sort according to the size of the resources simultaneously applied for, for example, S0≥S1≥…≥S K-1 , i=0, 1…, K-1. Further, the network device can adjust and allocate resources according to the sorting.

[0239] As an example, the terminal device i applies for resources S i , and the network device allocates resources Rsi to the terminal device i. If Rsi≥S i , the network device allocates resources S i to the terminal device i, and the remaining resources become R-Rsi, and so on.

[0240] In some embodiments, if the network device allocates resources to the first terminal device that are greater than or equal to the resources requested by the first terminal device, the first terminal device can directly send the first message or perform the first EDT. If the network device allocates resources to the first terminal device that are less than the resources requested by the first terminal device, the first terminal device cannot send the first message or perform the first EDT.

[0241] As an example, when the first resources are greater than or equal to the resources requested by the first terminal device, the first EDT is successful; or when the first resources are less than the resources requested by the first terminal device, the first EDT is unsuccessful.

[0242] As an example, the plurality of common PUR resources reserved by the network device can be allocated in turn according to the size of the resources applied for by the terminal devices. If the terminal device j applies for resources Sj Rsj< S and the resource Rsj can be allocated j Then, the message 3 access fails. From the perspective of the network device, each terminal device requiring EDT transmission has a relative allocation coefficient to indicate successful allocation or failure to allocate.

[0243] In some embodiments, when the first EDT is unsuccessful, the first terminal device can perform a first message retransmission or a random access procedure. As an example, the first terminal device can start a second timer. When the second timer expires, the first terminal device performs a retransmission of the first message. Thus, the second timer is used by the first terminal device to time the retransmission of the first message, which can also be referred to as a waiting timer.

[0244] As an example, when the first EDT is unsuccessful, the first terminal device can enter a buffer to wait and start a second timer T. The duration of the second timer can be configured by the network device and stored in the first terminal device and / or the network device. During the period of the running of the second timer, the first terminal device does not need to resend. When the second timer expires, the first terminal device retransmits the first message.

[0245] In some embodiments, when the number of retransmissions of the first message reaches a second threshold, the first terminal device performs a random access procedure. That is, the first terminal device does not always send the first message. Exemplarily, the first terminal device or the network device can set the number of retransmissions, i.e., the second threshold. When the number of retransmissions of the first message reaches or exceeds the second threshold, the first terminal device returns to the normal random access procedure and performs data transmission in the normal flow.

[0246] In some embodiments, after a terminal device in an RRC idle state reselects to another cell, it is difficult for the terminal device to directly resume using the PUR configuration specific to the terminal device. In this case, after reselecting to a new serving cell, the terminal device must again enter an RRC connected state to request the PUR configuration corresponding thereto.

[0247] The above set of FIG. 7 introduces a method of determining the first resource based on a contention-free manner. For ease of understanding, the following exemplary description is made in conjunction with FIG. 8. FIG. 8 is also introduced from the perspective of the interaction between the terminal device and the network device. The dashed line can represent that the flow is not necessarily executed.

[0248] Referring to FIG. 8, at step S810, the terminal device can receive the common configuration on RACH-less EDT sent by the network device. The network device can be an NTN network. The NTN network sends the configuration information of multiple common PURs of RACH-less EDT to the terminal device, or the terminal device can request the network device to send the configuration information of multiple common PURs via a specific RRC message PURConfigurationRequest.

[0249] At step S820, the terminal device can report the capability information on RACH-less EDT. The reported terminal device capability can also include the service type.

[0250] At step S830, the network device can indicate the terminal device-specific configuration on RACH-less EDT to the terminal device through the RRCRelease message. The terminal device-specific configuration can refer to the resource configuration information specific to the terminal device.

[0251] After step S830 is performed, the RRC state of the terminal device is converted from the RRC connected state to the RRC idle state. When the terminal device is released to the RRC idle state, the UE is specifically configured with the PUR. For example, the PUR is configured in the RRCConnectionRelease.

[0252] At step S840, the terminal device is in the RRC idle state and initiates the RACH-less EDT. The terminal device has been converted from the RRC connected state to the RRC idle state.

[0253] At step S850, the terminal device sends message 3 including higher layer data such as RRC early data request / RRC connection resume request. The message 3 can carry the terminal device-specific EDT-RNTI and / or DMRS, and the message 3 is sent on the obtained PUR.

[0254] At step S860, the network device sends the message 4 for response, and the terminal device receives the message 4. When the resource contention is based on the group, the message 4 can include the contention resolution message and can have higher layer data, etc.

[0255] The method of determining the uplink resource based on contention-free by the plurality of terminal devices requesting EDT is introduced above in combination with FIG. 7 and FIG. 8. Through the method, the problem of unbalanced resource utilization that may occur in the plurality of common PURs can be avoided.

[0256] Embodiment 3

[0257] In this embodiment, the first terminal device can determine the first resource based on the combination of Embodiment 1 and Embodiment 2. For example, the plurality of common PURs corresponding to the terminal device set in which the first terminal device is located are determined based on contention-free. Within the terminal device set, the first terminal device determines the first resource in the plurality of common PURs based on contention.

[0258] In some embodiments, the first RNTI is specific to the first terminal device. For the plurality of common PURs corresponding to the terminal device set in which the first terminal device is located, the network device needs to perform blind detection on each common PUR to try all possible EDT-RNTIs, and then send a message 4 to inform the first terminal device whether the decoding is successful.

[0259] As an example, the first terminal device determines the first resource pool in which the first resource is located according to the first configuration information. Within the first resource pool, the first terminal device selects the first resource to send the first message and monitors the feedback message sent by the network device. That is, the first configuration information is used to indicate the first resource pool, and the first terminal device determines the first resource in the first resource pool based on contention.

[0260] In some embodiments, the plurality of common PURs can be divided into a plurality of resource pools. Between the plurality of resource pools, the resource pool corresponding to the terminal device is determined based on contention-free through the first configuration information. That is, the network device can configure the resources in the plurality of resource pools based on a plurality of division manners. Within each resource pool, the plurality of terminal devices respectively determine the corresponding uplink resource based on contention.

[0261] As an example, the resource pool in which the first resource is located can be determined according to one or more of the following information: the signal quality of the configuration request signal sent by the first terminal device; the coverage enhancement (CE) level of the location where the first terminal device is located; the service time of the service of the first terminal device; and the service type of the first terminal device. The first terminal device can determine the resource pool in which it is located according to the corresponding parameters.

[0262] As an example, the plurality of common PURs can be divided into a plurality of resource pools based on one or more of the following information: signal quality of the configuration request sent by the plurality of terminal devices; CE level of the location where the plurality of terminal devices are located; service time of the plurality of terminal devices; and service type of the plurality of terminal devices. The signal quality of the configuration request sent by the plurality of terminal devices can also be referred to as an energy detection result.

[0263] As an example, the plurality of resource pools can be divided according to CE level. The plurality of terminal devices can be configured to determine the corresponding resource pool based on a coverage enhancement (CE) level. That is, a first terminal device can select a first resource based on a current CE level. The current CE level can be a CE level of a location where the first terminal device is currently located.

[0264] By way of example, for a bandwidth reduced low complexity (BL) / CE terminal device, there are 4 PRACH CE levels in total: 0, 1, 2, and 3. The CE levels 0 and 1 correspond to CEModeA; and the CE levels 2 and 3 correspond to CEModeB.

[0265] As an example, the plurality of resource pools can be divided based on the signal quality of the configuration request. The signal quality is, for example, a reference signal received power (RSRP). When the RSRP of the request signal received by the network device from a first terminal device is greater than a first threshold value, the first terminal device can use the configured plurality of common PURs at this time. That is, when the signal quality of the configuration request sent by the first terminal device is greater than the first threshold value, the first terminal device determines a first resource in the plurality of resource pools.

[0266] In the above example, the plurality of resource pools can be divided based on a plurality of different signal quality ranges. When the signal quality of the configuration request sent by the first terminal device is within a first value range, the first terminal device determines a first resource in the resource pool corresponding to the first value range.

[0267] As an example, multiple resource pools can be determined according to CE levels and signal quality. For the Internet of Things, different CE levels of message 3 transmission can correspond to different modulation and coding schemes (MCS), repetition times, etc., and different CE levels correspond to different RSRP detection thresholds. For example, the channel quality represented by CE levels from 0 to 3 gradually deteriorates. CE level 0 represents the best channel quality scenario; CE level 3 represents the worst channel quality scenario. The thresholds of the shared resource pool are set based on the RSRP values of different CE levels, that is, 4 CE levels can divide the entire resource pool of the common PUR into 4 parts, that is, 4 resource pools. Each part can correspond to a RSRP threshold: RSRP1, RSRP2, RSRP3, and RSRP4.

[0268] As an example, the resource pool in which the first resource is located can be determined according to the CE level and the carrier configuration. The first terminal device can first determine the CE level based on the RSRP of the serving cell. For the selected CE level, if the corresponding message 3 resource pool is configured on multiple carriers, the first terminal device can select the carrier. Illustratively, the first terminal device can select the carrier based on a probability factor.

[0269] As an example, multiple resource pools can be determined according to the results of both energy detection and service time. Illustratively, multiple common PURs are first divided into two blocks according to the energy detection result. Specifically, a basic RSRP threshold of the resource pool is set, and two resource block subsets are divided: subset A and subset B. When the network device receives a request signal from the terminal device, the RSRP is greater than or equal to the threshold, and / or the service time is outside T-service, the terminal device can use multiple common PURs and is allocated to a specific resource block subset A. When the network receives a request signal from the terminal device, the RSRP is less than the threshold, and / or the service time is within T-service, the terminal device can use multiple common PURs and is allocated to a specific resource block subset B.

[0270] In the above example, the resource subset A and the resource subset B for sharing can be pre-configured, and the starting time slot index of the resource subset A is calculated from the starting bit of the entire resource pool. The starting time slot index of the resource subset B immediately follows the last time slot index of the resource subset A. That is, the time domain position of the resource subset A is earlier than the time domain position of the resource subset B.

[0271] In the above example, the starting time slot index of the resource subset A can be calculated from the specified bit of the entire resource pool.

[0272] As an example, the resource pool in which the first resource is located can be determined according to the service time of the first terminal device. Illustratively, the first terminal device corresponds to a first NTN cell, the plurality of resource pools include a first resource pool and a second resource pool, and the time domain location of the first resource pool is earlier than the time domain location of the second resource pool. When the service time of the first terminal device is outside the service time (T-service) of the first NTN cell, the first terminal device determines the first resource on the first resource pool, so as to timely send the first message by the first terminal device. When the service time of the first terminal device is within the service time of the first NTN cell, the first terminal device determines the first resource on the second resource pool. When the service time is within T-service, the service of the first terminal device is not urgent, and the plurality of public PURs can be given priority to other terminal devices whose service time is outside T-service.

[0273] As an example, when the NTN cell in which the first terminal device is located supports L types of services, the plurality of resource pools are L resource pools. The size of each resource pool in the L resource pools is determined according to the service priority. Illustratively, all service types supported in the NTN cell are defined. It is assumed that L types are supported according to the quality of service class identifier (QCI). When there are MxN physical resource blocks (PRBs) on each time slot or resource, the resource that can be allocated to each type of service is (MxN) / L. That is, on average, the maximum resource allocated to each type of service is (MxN) / L. A fairness factor Q j is set for each service type, j=0, 1, …, L-1. The system can allocate a fairness factor to each service type according to the service priority. If the maximum resource allocated to all services is (MxN) / L, the resource allocated to service type j is: Q j x (MxN) / L, Q j ≤1.

[0274] In embodiment 3, the terminal device can first determine the resource pool of the first resource based on a contention-free manner, and then select the first resource in the resource pool based on a contention manner to send the first message. Through this method, the problem of resource conflict caused by too many terminal devices in the NTN system can be effectively solved, and the problem of unbalanced resource utilization can also be minimized.

[0275] The method embodiments of the present application are described in detail above in combination with FIGS. 1 to 8. The device embodiments of the present application are described in detail below in combination with FIGS. 9 to 11. It should be understood that the description of the device embodiments corresponds to the description of the method embodiments, and therefore, the parts not described in detail can be referred to the foregoing method embodiments.

[0276] FIG. 9 is a schematic block diagram of an apparatus for wireless communication, according to an embodiment of the application. The apparatus 900 can be any of the first terminal devices described above. The apparatus 900 shown in FIG. 9 includes a transmitting unit 910 and a receiving unit 920.

[0277] The transmitting unit 910 can be configured to transmit a first message on a first resource, the first message being used to request a first EDT.

[0278] The receiving unit 920 can be configured to receive a feedback message of the first EDT sent by the network device, the feedback message of the first EDT including a first RNTI; wherein the first resource is one of a plurality of common PURs, the plurality of common PURs corresponding to a plurality of RNTIs including the first RNTI, the first RNTI corresponding to the first resource or the first message including the first RNTI.

[0279] Optionally, the apparatus 900 further includes a first determining unit, which can be configured to determine the first RNTI according to a configuration of the network device, or calculate the first RNTI according to a configuration of the plurality of common PURs.

[0280] Optionally, the first RNTI is determined according to a position of the first resource in the plurality of common PURs and / or a terminal device set in which the first terminal device is located.

[0281] Optionally, the plurality of common PURs correspond to a plurality of terminal device sets, when the first terminal device is a terminal device j in a terminal device set i, the first RNTI is: EDT-RNTI(i,j) = 1 + s id (i,j) + 14 × t id (i,j) + 14 × M(i) × f id (i,j) + 14 × M(i) × N(i) × ulcarrier,id;

[0282] wherein s id (i,j) represents an index of a symbol corresponding to the terminal device j in the plurality of common PURs, t id (i,j) represents an index of a slot corresponding to the terminal device j in the plurality of common PURs, f id (i,j) represents an index of a frequency domain resource corresponding to the terminal device j in the plurality of common PURs, M(i) represents a number of slots of the terminal device set i, N(i) represents a number of frequency domain resources of the terminal device set i, and ulcarrier,id represents an uplink carrier index corresponding to the first message.

[0283] Optionally, the first terminal device is one of a plurality of terminal devices requesting EDT in the NTN cell, the first RNTI is configured by the network device and is related to a terminal device set in which the first terminal device is located, and the terminal device set in which the first terminal device is located is determined according to one or more of the following: a service type of the first terminal device; a service time of the first terminal device; location information of the first terminal device and / or a plurality of sub-areas of the NTN cell.

[0284] Optionally, the plurality of sub-areas respectively correspond to a plurality of common PUR sets, and sizes of the plurality of common PUR sets are determined according to a number of the plurality of sub-areas and / or distances between each of the plurality of sub-areas and an edge of the NTN cell.

[0285] Optionally, the first RNTI is determined according to one or more of the following parameters: an ID of the first terminal device, a cell RNTI, and a TMSI.

[0286] Optionally, the configuration of the plurality of common PURs is for a serving cell and / or a neighboring cell in which the first terminal device is located.

[0287] Optionally, the feedback message of the first EDT is one or more of the following: an RRC EarlyDataComplete; an RRC ConnectionRelease; a ContentionResolution; and an ACK from Layer 1 and / or Layer 2.

[0288] Optionally, the receiving unit 920 is further configured to receive the feedback message of the first EDT based on the first timer; and the apparatus 900 further includes a second determining unit configured to determine whether to perform a random access procedure when the feedback message indicates that the first EDT is unsuccessful.

[0289] Optionally, the feedback message of the first EDT is one of a group message, and the group message includes feedback messages of a part or all of terminal devices in the first terminal device set requesting EDT, and the part or all of terminal devices include the first terminal device.

[0290] Optionally, the group message is carried in a first MAC SDU, and a reserved bit in a header of the first MAC SDU is used to indicate a service type corresponding to the first terminal device set or an identifier of a sub-area in which the first terminal device set is located.

[0291] Optionally, the first resource is used for a part or all of terminal devices in the first terminal device set to request EDT.

[0292] Optionally, the first message is transmitted based on a first TA value, the first TA value being pre-compensated according to one or more of the following parameters: a duration that the first terminal device is in an idle state; a TA value stored by the first terminal device at a previous TA adjustment; a maximum TA pre-compensation value when the first terminal device is in a connected state at a previous time; a path loss and a Doppler frequency offset when the first terminal device receives configuration information of a plurality of common PURs.

[0293] Optionally, the first TA value or a compensation value of the first TA value is T delay × T TA ; wherein T delay represents the duration, T TA represents the TA value stored by the first terminal device at the previous TA adjustment.

[0294] Optionally, the first terminal device is in an idle state.

[0295] Optionally, the sending unit 910 and the receiving unit 920 in the apparatus 900 can be a transceiver 1130, and the apparatus 900 can further include a processor 1110 and a memory 1120, as shown in FIG. 11.

[0296] FIG. 10 is a schematic block diagram of another apparatus for wireless communication, according to an embodiment of the present application. The apparatus 1000 can be any of the network devices described above. The apparatus 1000 shown in FIG. 10 includes a receiving unit 1010 and a sending unit 1020.

[0297] The receiving unit 1010 can be configured to receive a first message on a first resource, the first message being used for a first terminal device to request a first EDT.

[0298] The sending unit 1020 can be configured to send a feedback message of the first EDT to the first terminal device, the feedback message of the first EDT including a first RNTI; wherein the first resource is one of a plurality of common PURs, the plurality of common PURs corresponding to a plurality of RNTIs including the first RNTI, and the first RNTI being an RNTI corresponding to the first resource or an RNTI in the first message.

[0299] Optionally, the apparatus 1000 further includes a processing unit, which can be configured to configure the first RNTI for the first terminal device, or determine the first RNTI according to the first resource.

[0300] Optionally, the first RNTI is determined according to a position of the first resource in the plurality of common PURs and / or a terminal device set in which the first terminal device is located.

[0301] Optionally, the plurality of common PURs correspond to a plurality of terminal device sets, and the first RNTI is EDT-RNTI(i,j)=1+s id (i,j)+14×t id (i,j)+14×M(i)×f id (i,j)+14×M(i)×N(i)×ulcarrier,id;

[0302] wherein s id (i,j) represents an index of a symbol corresponding to the terminal device j in the plurality of common PURs, t id (i,j) represents an index of a time slot corresponding to the terminal device j in the plurality of common PURs, f id (i,j) represents an index of a frequency domain resource corresponding to the terminal device j in the plurality of common PURs, M(i) represents a number of time slots of the terminal device set i, N(i) represents a number of frequency domain resources of the terminal device set i, and ulcarrier,id represents an uplink carrier index corresponding to the first message.

[0303] Optionally, the first terminal device is one of a plurality of terminal devices requesting an EDT in a non-terrestrial network (NTN) cell, and the first RNTI configured by the network device is related to a terminal device set in which the first terminal device is located, and the terminal device set in which the first terminal device is located is determined according to one or more of the following: a service type of the first terminal device; a service time of the first terminal device; location information of the first terminal device and / or a plurality of sub-areas of the NTN cell.

[0304] Optionally, the plurality of sub-areas respectively correspond to a plurality of common PUR sets, and sizes of the plurality of common PUR sets are determined according to a number of the plurality of sub-areas and / or distances between each sub-area in the plurality of sub-areas and an edge of the NTN cell.

[0305] Optionally, the first RNTI is determined according to one or more of the following parameters: an ID of the first terminal device, a cell RNTI, and a TMSI.

[0306] Optionally, configurations of the plurality of common PURs are used for a serving cell and / or a neighboring cell in which the first terminal device is located.

[0307] Optionally, the feedback message of the first EDT is one or more of the following: an RRC EarlyDataComplete; an RRC ConnectionRelease; a ContentionResolution; an ACK from layer 1 and / or layer 2.

[0308] Optionally, the feedback message is used to indicate whether the first EDT is successful.

[0309] Optionally, the feedback message of the first EDT is one of group messages, the group messages including feedback messages requested by part or all of terminal devices in the first terminal device set, and the part or all of terminal devices including the first terminal device.

[0310] Optionally, the group messages are carried in the first MAC SDU, and a reserved bit in a header of the first MAC SDU is used to indicate a service type corresponding to the first terminal device set or an identifier of a sub-area where the first terminal device set is located.

[0311] Optionally, the first resource is used for the part or all of terminal devices in the first terminal device set to request the EDT.

[0312] Optionally, the first message is transmitted based on a first TA value, and the first TA value is pre-compensated according to one or more of the following parameters: a duration that the first terminal device is in an idle state; a TA value stored by the first terminal device at a previous TA adjustment; a maximum TA pre-compensation value when the first terminal device is in a connected state last time; and a path loss and a Doppler frequency offset when the first terminal device receives configuration information of a plurality of common PURs.

[0313] Optionally, the first TA value or a compensation value of the first TA value is: T delay × T TA ; wherein T delay represents the duration, and T TA represents the TA value stored by the first terminal device at the previous TA adjustment.

[0314] Optionally, the first terminal device is in the idle state.

[0315] Optionally, the receiving unit 1010 and the sending unit 1020 in the apparatus 1000 can be a transceiver 1130, and the apparatus 1000 can further include a processor 1110 and a memory 1120, as shown in FIG. 11.

[0316] FIG. 11 shows a structure schematic diagram of a communication apparatus according to an embodiment of the present application. The dashed line in FIG. 11 indicates that the unit or module is optional. The apparatus 1100 can be used to implement the method described in the above method embodiments. The apparatus 1100 can be a chip, a terminal device or a network device.

[0317] The apparatus 1100 can include one or more processors 1110. The processor 1110 can support the apparatus 1100 to implement the methods described in the foregoing method embodiments. The processor 1110 can be a general processor or a special-purpose processor. For example, the processor can be a central processing unit (CPU). Alternatively, the processor can also be other general processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic devices, discrete gates or transistor logic, discrete hardware components, etc. The general processor can be a microprocessor or the processor can also be any conventional processor.

[0318] The apparatus 1100 can also include one or more memories 1120. The memory 1120 stores a program that can be executed by the processor 1110, so that the processor 1110 executes the methods described in the foregoing method embodiments. The memory 1120 can be independent of the processor 1110 or integrated in the processor 1110.

[0319] The apparatus 1100 can also include a transceiver 1130. The processor 1110 can communicate with other devices or chips through the transceiver 1130. For example, the processor 1110 can perform data transceiving with other devices or chips through the transceiver 1130.

[0320] The embodiments of the present application also provide a computer readable storage medium for storing a program. The computer readable storage medium can be applied to the terminal device or the network device provided by the embodiments of the present application, and the program causes the computer to execute the method performed by the terminal device or the network device in the embodiments of the present application. The computer readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server, data center, etc. integrated with one or more available media. The available medium can be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a digital video disc (DVD)) or a semiconductor medium (for example, a solid state disk (SSD)) and the like.

[0321] The embodiment of the present application further provides a computer program product. The computer program product comprises a program. The computer program product can be applied to the terminal device or the network device provided by the embodiment of the present application, and the program causes the computer to execute the method performed by the terminal device or the network device in the various embodiments of the present application.

[0322] In the above embodiment, the implementation can be achieved by software, hardware, firmware or any combination thereof, entirely or partially. When implemented by software, the implementation can be achieved in the form of a computer program product, entirely or partially. The computer program product comprises one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the flow or function described in the embodiment of the present application is generated, entirely or partially. The computer can be a general-purpose computer, a special-purpose computer, a computer network or other programmable device. The computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another, for example, the computer instructions can be transferred from one website, computer, server or data center to another through wired (for example, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (for example, infrared, wireless, microwave, etc.) mode.

[0323] The embodiment of the present application further provides a computer program. The computer program can be applied to the terminal device or the network device provided by the embodiment of the present application, and the computer program causes the computer to execute the method performed by the terminal device or the network device in the various embodiments of the present application.

[0324] The terms "system" and "network" can be used interchangeably in the present application. In addition, the terms used in the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application. The terms "first", "second", "third" and "fourth" and the like in the specification and claims of the present application and the drawings are used to distinguish different objects, and are not used to describe a particular order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0325] In the embodiments of the present application, the "indication" mentioned can be direct indication, indirect indication, or can be an indication with an associated relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; or it can mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; or it can mean that A and B have an associated relationship.

[0326] In the embodiments of the present application, the term "corresponding" can represent a relationship with direct or indirect correspondence between the two, can also represent a relationship between the two, and can also indicate a relationship with the indicated, configured, and the like.

[0327] In the embodiments of the present application, "predefined" or "preconfigured" can be realized by pre-saving corresponding codes, tables or other ways that can be used to indicate related information in devices (for example, including terminal devices and network devices), and the specific implementation manner is not limited in the present application. For example, predefinition can refer to definition in a protocol.

[0328] In the embodiments of the present application, determining B according to A does not mean that B is determined only according to A, but also can be determined according to A and / or other information.

[0329] In the embodiments of the present application, the term "and / or" is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are in an "or" relationship.

[0330] In the embodiments of the present application, the size of the serial number of the above processes does not mean the order of execution, and the execution order of the processes should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0331] In several embodiments provided by the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only schematic. The division of the units is only a logical function division. There can be another division manner in actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections between the units can be indirect couplings or communication connections through some interfaces, devices or units, and can be electrical, mechanical or in other forms.

[0332] The units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiments of the present application.

[0333] In addition, each of the functional units in the various embodiments of the present application can be integrated in one processing unit, or each of the units can exist physically, or two or more units can be integrated in one unit.

[0334] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for wireless communication, characterized in that, include: The first terminal device sends a first message on the first resource, the first message being used to request the first early data transmission (EDT); The first terminal device receives a feedback message from the network device for the first EDT, and the feedback message for the first EDT includes the first wireless network temporary identifier (RNTI). Wherein, the first resource is one of a plurality of common pre-configured uplink resources (PURs), the plurality of common PURs correspond to a plurality of RNTIs including the first RNTI, and the first RNTI corresponds to the first resource or the first message includes the first RNTI.

2. The method according to claim 1, characterized in that, The method further includes: The first terminal device determines the first RNTI based on the configuration of the network device; or... The first terminal device calculates the first RNTI based on the configuration of the plurality of public PURs.

3. The method according to claim 1 or 2, characterized in that, The first RNTI is determined based on the location of the first resource in the plurality of public PURs and / or the set of terminal devices to which the first terminal device is located.

4. The method according to claim 3, characterized in that, The multiple public PURs correspond to multiple sets of terminal devices. When the first terminal device is terminal device j in terminal device set i, the first RNTI is: EDT-RNTI(i,j)=1+s id (i,j)+14×t id (i,j)+14×M(i)×f id (i,j)+14×M(i)×N(i)×ulcarrier,id; Among them, s id (i,j) represents the index of the symbol corresponding to terminal device j in the plurality of public PURs, t id (i,j) represents the index of the time slot corresponding to terminal device j in the multiple public PURs, f id (i,j) represents the index of the frequency domain resource corresponding to terminal device j in the plurality of public PURs, M(i) represents the number of time slots of terminal device set i, N(i) represents the number of frequency domain resources of terminal device set i, and ulcarrier,id represents the index of the uplink carrier corresponding to the first message.

5. The method according to claim 3 or 4, characterized in that, The first terminal device is one of multiple terminal devices requesting EDT within a non-terrestrial network (NTN) cell. The first RNTI configured by the network device is related to the set of terminal devices to which the first terminal device belongs. The set of terminal devices to which the first terminal device belongs is determined based on one or more of the following information: The service type of the first terminal device; The service time of the first terminal device; The location information of the first terminal device and / or multiple sub-regions of the NTN cell.

6. The method according to claim 5, characterized in that, The multiple sub-regions correspond to multiple public PUR sets, and the size of the multiple public PUR sets is determined based on the number of the multiple sub-regions and / or the distance between each of the multiple sub-regions and the edge of the NTN cell.

7. The method according to claim 1 or 2, characterized in that, The first RNTI is determined based on one or more of the following parameters: the identifier ID of the first terminal device, the cell RNTI, and the temporary mobile subscription identifier TMSI.

8. The method according to any one of claims 1-7, characterized in that, The configuration of the multiple public PURs is used for the serving cell and / or neighboring cells where the first terminal device is located.

9. The method according to any one of claims 1-8, characterized in that, The feedback message of the first EDT is one or more of the following: RRCEarlyDataComplete; RRCCnnectionRelease; ContentionResolution; A positive acknowledgment (ACK) from layer 1 and / or layer 2.

10. The method according to any one of claims 1-9, characterized in that, The method further includes: The first terminal device receives the feedback message from the first EDT based on the first timer; When the feedback message indicates that the first EDT is unsuccessful, the first terminal device determines whether to execute a random access procedure.

11. The method according to any one of claims 1-10, characterized in that, The feedback message of the first EDT is one of the group messages, which includes feedback messages from some or all of the terminal devices in the first set of terminal devices requesting EDT, and the some or all of the terminal devices include the first terminal device.

12. The method according to claim 11, characterized in that, The group message is carried in the first Media Access Control Service Data Unit (MAC SDU), and the reserved bits in the header of the first MAC SDU are used to indicate the service type corresponding to the first set of terminal devices or the identifier of the sub-region where the first set of terminal devices is located.

13. The method according to claim 11 or 12, characterized in that, The first resource is used for some or all of the terminal devices in the first set of terminal devices to request EDT.

14. The method according to any one of claims 1-13, characterized in that, The first message is sent based on a first timing advance TA value, which is pre-compensated according to one or more of the following parameters: The duration of the first terminal device being in an idle state; The TA value stored by the first terminal device during the previous TA adjustment; The maximum TA pre-compensation value when the first terminal device was previously in a connected state; The path loss and Doppler frequency offset when the first terminal device receives the configuration information of the multiple common PURs.

15. The method according to claim 14, characterized in that, The first TA value or the compensation value of the first TA value is: T delay ×T TA ; Among them, T delay T represents the duration. TA This indicates the TA value stored by the first terminal device during the previous TA adjustment.

16. The method according to any one of claims 1-15, characterized in that, The first terminal device is in an idle state.

17. A method for wireless communication, characterized in that, include: The network device receives a first message on a first resource, the first message being used by a first terminal device to request a first early data transmission (EDT); The network device sends a feedback message of the first EDT to the first terminal device. The feedback message of the first EDT includes the first wireless network temporary identifier (RNTI). Wherein, the first resource is one of a plurality of common pre-configured uplink resources (PURs), and the plurality of common PURs correspond to a plurality of RNTIs including the first RNTI. The first RNTI is the RNTI corresponding to the first resource or the RNTI in the first message.

18. The method according to claim 17, characterized in that, The method further includes: The network device configures the first RNTI for the first terminal device; or... The network device determines the first RNTI based on the first resource.

19. The method according to claim 17 or 18, characterized in that, The first RNTI is determined based on the location of the first resource in the plurality of public PURs and / or the set of terminal devices to which the first terminal device is located.

20. The method according to claim 19, characterized in that, The multiple public PURs correspond to multiple sets of terminal devices. When the first terminal device is terminal device j in terminal device set i, the first RNTI is: EDT-RNTI(i,j)=1+s id (i,j)+14×t id (i,j)+14×M(i)×f id (i,j)+14×M(i)×N(i)×ulcarrier,id; Among them, s id (i,j) represents the index of the symbol corresponding to terminal device j in the plurality of public PURs, t id (i,j) represents the index of the time slot corresponding to terminal device j in the multiple public PURs, f id (i,j) represents the index of the frequency domain resource corresponding to terminal device j in the plurality of public PURs, M(i) represents the number of time slots of terminal device set i, N(i) represents the number of frequency domain resources of terminal device set i, and ulcarrier,id represents the index of the uplink carrier corresponding to the first message.

21. The method according to claim 19 or 20, characterized in that, The first terminal device is one of multiple terminal devices requesting EDT within a non-terrestrial network (NTN) cell. The first RNTI configured by the network device is related to the set of terminal devices to which the first terminal device belongs. The set of terminal devices to which the first terminal device belongs is determined based on one or more of the following information: The service type of the first terminal device; The service time of the first terminal device; The location information of the first terminal device and / or multiple sub-regions of the NTN cell.

22. The method according to claim 21, characterized in that, The multiple sub-regions correspond to multiple public PUR sets, and the size of the multiple public PUR sets is determined based on the number of the multiple sub-regions and / or the distance between each of the multiple sub-regions and the edge of the NTN cell.

23. The method according to claim 17 or 18, characterized in that, The first RNTI is determined based on one or more of the following parameters: the identifier ID of the first terminal device, the cell RNTI, and the temporary subscriber identification card TMSI.

24. The method according to any one of claims 17-23, characterized in that, The configuration of the multiple public PURs is used for the serving cell and / or neighboring cells where the first terminal device is located.

25. The method according to any one of claims 17-24, characterized in that, The feedback message of the first EDT is one or more of the following: RRCEarlyDataComplete; RRCCnnectionRelease; ContentionResolution; A positive acknowledgment (ACK) from layer 1 and / or layer 2.

26. The method according to any one of claims 17-25, characterized in that, The feedback message is used to indicate whether the first EDT was successful.

27. The method according to any one of claims 17-26, characterized in that, The feedback message of the first EDT is one of the group messages, which includes feedback messages from some or all of the terminal devices in the first set of terminal devices requesting EDT, and the some or all of the terminal devices include the first terminal device.

28. The method according to claim 27, characterized in that, The group message is carried in the first Media Access Control Service Data Unit (MAC SDU), and the reserved bits in the header of the first MAC SDU are used to indicate the service type corresponding to the first set of terminal devices or the identifier of the sub-region where the first set of terminal devices is located.

29. The method according to claim 27 or 28, characterized in that, The first resource is used for some or all of the terminal devices in the first set of terminal devices to request EDT.

30. The method according to any one of claims 17-29, characterized in that, The first message is sent based on a first timing advance TA value, which is pre-compensated according to one or more of the following parameters: The duration of the first terminal device being in an idle state; The TA value stored by the first terminal device during the previous TA adjustment; The maximum TA pre-compensation value when the first terminal device was previously in a connected state; The path loss and Doppler frequency offset when the first terminal device receives the configuration information of the multiple common PURs.

31. The method according to claim 30, characterized in that, The first TA value or the compensation value of the first TA value is: T delay ×T TA ; Among them, T delay T represents the duration. TA This indicates the TA value stored by the first terminal device during the previous TA adjustment.

32. The method according to any one of claims 17-31, characterized in that, The first terminal device is in an idle state.

33. A wireless communication device, characterized in that, The device is a first terminal device, and the device includes: A sending unit is configured to send a first message on a first resource, the first message being used to request a first early data transmission (EDT); The receiving unit is configured to receive a feedback message of the first EDT sent by the network device, wherein the feedback message of the first EDT includes a first radio network temporary identifier (RNTI). Wherein, the first resource is one of a plurality of common pre-configured uplink resources (PURs), the plurality of common PURs correspond to a plurality of RNTIs including the first RNTI, and the first RNTI corresponds to the first resource or the first message includes the first RNTI.

34. The apparatus according to claim 33, characterized in that, The device further includes: The first determining unit is configured to determine the first RNTI based on the configuration of the network device, or to calculate the first RNTI based on the configuration of the plurality of public PURs.

35. The apparatus according to claim 33 or 34, characterized in that, The first RNTI is determined based on the location of the first resource in the plurality of public PURs and / or the set of terminal devices to which the first terminal device is located.

36. The apparatus according to claim 35, characterized in that, The multiple public PURs correspond to multiple sets of terminal devices. When the first terminal device is terminal device j in terminal device set i, the first RNTI is: EDT-RNTI(i,j)=1+s id (i,j)+14×t id (i,j)+14×M(i)×f id (i,j)+14×M(i)×N(i)×ulcarrier,id; Among them, s id (i,j) represents the index of the symbol corresponding to terminal device j in the plurality of public PURs, t id (i,j) represents the index of the time slot corresponding to terminal device j in the multiple public PURs, f id (i,j) represents the index of the frequency domain resource corresponding to terminal device j in the plurality of public PURs, M(i) represents the number of time slots of terminal device set i, N(i) represents the number of frequency domain resources of terminal device set i, and ulcarrier,id represents the index of the uplink carrier corresponding to the first message.

37. The apparatus according to claim 35 or 36, characterized in that, The first terminal device is one of multiple terminal devices requesting EDT within a non-terrestrial network (NTN) cell. The first RNTI configured by the network device is related to the set of terminal devices to which the first terminal device belongs. The set of terminal devices to which the first terminal device belongs is determined based on one or more of the following information: The service type of the first terminal device; The service time of the first terminal device; The location information of the first terminal device and / or multiple sub-regions of the NTN cell.

38. The apparatus according to claim 37, characterized in that, The multiple sub-regions correspond to multiple public PUR sets, and the size of the multiple public PUR sets is determined based on the number of the multiple sub-regions and / or the distance between each of the multiple sub-regions and the edge of the NTN cell.

39. The apparatus according to claim 33 or 34, characterized in that, The first RNTI is determined based on one or more of the following parameters: the identifier ID of the first terminal device, the cell RNTI, and the temporary mobile subscription identifier TMSI.

40. The apparatus according to any one of claims 33-39, characterized in that, The configuration of the multiple public PURs is used for the serving cell and / or neighboring cells where the first terminal device is located.

41. The apparatus according to any one of claims 33-40, characterized in that, The feedback message of the first EDT is one or more of the following: RRCEarlyDataComplete; RRCCnnectionRelease; ContentionResolution; A positive acknowledgment (ACK) from layer 1 and / or layer 2.

42. The apparatus according to any one of claims 33-41, characterized in that, The receiving unit is further configured to receive the feedback message of the first EDT based on a first timer; the device further includes: The second determining unit is used to determine whether to execute a random access procedure when the feedback message indicates that the first EDT is unsuccessful.

43. The apparatus according to any one of claims 33-42, characterized in that, The feedback message of the first EDT is one of the group messages, which includes feedback messages from some or all of the terminal devices in the first set of terminal devices requesting EDT, and the some or all of the terminal devices include the first terminal device.

44. The apparatus according to claim 43, characterized in that, The group message is carried in the first Media Access Control Service Data Unit (MAC SDU), and the reserved bits in the header of the first MAC SDU are used to indicate the service type corresponding to the first set of terminal devices or the identifier of the sub-region where the first set of terminal devices is located.

45. The apparatus according to claim 43 or 44, characterized in that, The first resource is used for some or all of the terminal devices in the first set of terminal devices to request EDT.

46. ​​The apparatus according to any one of claims 33-45, characterized in that, The first message is sent based on a first timing advance TA value, which is pre-compensated according to one or more of the following parameters: The duration of the first terminal device being in an idle state; The TA value stored by the first terminal device during the previous TA adjustment; The maximum TA pre-compensation value when the first terminal device was previously in a connected state; The path loss and Doppler frequency offset when the first terminal device receives the configuration information of the multiple common PURs.

47. The apparatus according to claim 46, characterized in that, The first TA value or the compensation value of the first TA value is: T delay ×T TA ; Among them, T delay T represents the duration. TA This indicates the TA value stored by the first terminal device during the previous TA adjustment.

48. The apparatus according to any one of claims 33-47, characterized in that, The first terminal device is in an idle state.

49. A wireless communication device, characterized in that, The device is a network device, and the device includes: The receiving unit is configured to receive a first message on a first resource, wherein the first message is used by a first terminal device to request a first early data transmission (EDT). The sending unit is configured to send a feedback message of the first EDT to the first terminal device, wherein the feedback message of the first EDT includes a first wireless network temporary identifier (RNTI). Wherein, the first resource is one of a plurality of common pre-configured uplink resources (PURs), and the plurality of common PURs correspond to a plurality of RNTIs including the first RNTI. The first RNTI is the RNTI corresponding to the first resource or the RNTI in the first message.

50. The apparatus according to claim 49, characterized in that, The device further includes: The processing unit is configured to configure the first RNTI for the first terminal device, or to determine the first RNTI based on the first resource.

51. The apparatus according to claim 49 or 50, characterized in that, The first RNTI is determined based on the location of the first resource in the plurality of public PURs and / or the set of terminal devices to which the first terminal device is located.

52. The apparatus according to claim 51, characterized in that, The multiple public PURs correspond to multiple sets of terminal devices. When the first terminal device is terminal device j in terminal device set i, the first RNTI is: EDT-RNTI(i,j)=1+s id (i,j)+14×t id (i,j)+14×M(i)×f id (i,j)+14×M(i)×N(i)×ulcarrier,id; Among them, s id (i,j) represents the index of the symbol corresponding to terminal device j in the plurality of public PURs, t id (i,j) represents the index of the time slot corresponding to terminal device j in the multiple public PURs, f id (i,j) represents the index of the frequency domain resource corresponding to terminal device j in the plurality of public PURs, M(i) represents the number of time slots of terminal device set i, N(i) represents the number of frequency domain resources of terminal device set i, and ulcarrier,id represents the index of the uplink carrier corresponding to the first message.

53. The apparatus according to claim 51 or 52, characterized in that, The first terminal device is one of multiple terminal devices requesting EDT within a non-terrestrial network (NTN) cell. The first RNTI configured by the network device is related to the set of terminal devices to which the first terminal device belongs. The set of terminal devices to which the first terminal device belongs is determined based on one or more of the following information: The service type of the first terminal device; The service time of the first terminal device; The location information of the first terminal device and / or multiple sub-regions of the NTN cell.

54. The apparatus according to claim 53, characterized in that, The multiple sub-regions correspond to multiple public PUR sets, and the size of the multiple public PUR sets is determined based on the number of the multiple sub-regions and / or the distance between each of the multiple sub-regions and the edge of the NTN cell.

55. The apparatus according to claim 49 or 50, characterized in that, The first RNTI is determined based on one or more of the following parameters: the identifier ID of the first terminal device, the cell RNTI, and the temporary subscriber identification card TMSI.

56. The apparatus according to any one of claims 49-55, characterized in that, The configuration of the multiple public PURs is used for the serving cell and / or neighboring cells where the first terminal device is located.

57. The apparatus according to any one of claims 49-56, characterized in that, The feedback message of the first EDT is one or more of the following: RRCEarlyDataComplete; RRCCnnectionRelease; ContentionResolution; A positive acknowledgment (ACK) from layer 1 and / or layer 2.

58. The apparatus according to any one of claims 49-57, characterized in that, The feedback message is used to indicate whether the first EDT was successful.

59. The apparatus according to any one of claims 49-58, characterized in that, The feedback message of the first EDT is one of the group messages, which includes feedback messages from some or all of the terminal devices in the first set of terminal devices requesting EDT, and the some or all of the terminal devices include the first terminal device.

60. The apparatus according to claim 59, characterized in that, The group message is carried in the first Media Access Control Service Data Unit (MAC SDU), and the reserved bits in the header of the first MAC SDU are used to indicate the service type corresponding to the first set of terminal devices or the identifier of the sub-region where the first set of terminal devices is located.

61. The apparatus according to claim 59 or 60, characterized in that, The first resource is used for some or all of the terminal devices in the first set of terminal devices to request EDT.

62. The apparatus according to any one of claims 49-61, characterized in that, The first message is sent based on a first timing advance TA value, which is pre-compensated according to one or more of the following parameters: The duration of the first terminal device being in an idle state; The TA value stored by the first terminal device during the previous TA adjustment; The maximum TA pre-compensation value when the first terminal device was previously in a connected state; The path loss and Doppler frequency offset when the first terminal device receives the configuration information of the multiple common PURs.

63. The apparatus according to claim 62, characterized in that, The first TA value or the compensation value of the first TA value is: T delay ×T TA ; Among them, T delay T represents the duration. TA This indicates the TA value stored by the first terminal device during the previous TA adjustment.

64. The apparatus according to any one of claims 49-63, characterized in that, The first terminal device is in an idle state.

65. A communication device, characterized in that, It includes a memory and a processor, the memory being used to store a program, and the processor being used to invoke the program in the memory to perform the method as described in any one of claims 1-32.

66. An apparatus, characterized in that, Includes a processor for calling a program from memory to perform the method as described in any one of claims 1-32.

67. A chip, characterized in that, Includes a processor for calling a program from memory, causing a device on which the chip is mounted to perform the method as described in any one of claims 1-32.

68. A computer-readable storage medium, characterized in that, It contains a program that causes a computer to perform the method as described in any one of claims 1-32.

69. A computer program product, characterized in that, Includes a program that causes a computer to perform the method as described in any one of claims 1-32.

70. A computer program, characterized in that, The computer program causes the computer to perform the method as described in any one of claims 1-32.

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