Methods and apparatuses for wireless communication

Abstract

Provided are methods and apparatuses for wireless communication, which facilitate EDT-based access by a terminal device. A method comprises: a first terminal device receiving first configuration information, wherein the first configuration information is used for the first terminal device to determine a first resource; and the first terminal device sending a first message on the first resource, wherein the first message is used for requesting first EDT, the first resource is one of a plurality of common PURs, and the plurality of common PURs are used for data transmission in an NTN.

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] In order 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 receiving first configuration information, the first configuration information being used for the first terminal device to determine a first resource; the first terminal device sending a first message on the first resource, the first message being used for requesting a first EDT; wherein the first resource is one of a plurality of common PURs, and the plurality of common PURs are used for data transmission in an NTN.

[0007] In a second aspect, a method for wireless communication is provided, comprising: a network device sending first configuration information, the first configuration information being used for a first terminal device to determine a first resource; the network device receiving a first message sent by the first terminal device on the first resource, the first message being used for requesting a first EDT; wherein the first resource is one of a plurality of common PURs, and the plurality of common PURs are used for data transmission in an NTN.

[0008] In a third aspect, a device for wireless communication is provided. The device is a first terminal device. The device includes a receiving unit configured to receive first configuration information, the first configuration information being used by the first terminal device to determine a first resource; and a transmitting unit configured to transmit a first message on the first resource, the first message being used to request a first EDT, wherein the first resource is one of a plurality of common PURs, and the plurality of common PURs are used for data transmission in an NTN.

[0009] In a fourth aspect, a device for wireless communication is provided. The device is a network device. The device includes a transmitting unit configured to transmit first configuration information, the first configuration information being used by a first terminal device to determine a first resource; and a receiving unit configured to receive a first message transmitted by the first terminal device on the first resource, the first message being used to request a first EDT, wherein the first resource is one of a plurality of common PURs, and the plurality of common PURs are used for data transmission in an NTN.

[0010] In a fifth aspect, a communication device is provided. The communication device includes a memory and a processor. The memory is configured to store a program. The processor is configured to invoke the program in the memory to perform the method of the first aspect or the second aspect.

[0011] In a sixth aspect, a device is provided. The device includes a processor configured to invoke a program in a memory to perform the method of the first aspect or the second aspect.

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

[0013] In an eighth aspect, a computer-readable storage medium is provided. The computer-readable storage medium stores a program. The program causes a computer to perform the method of the first aspect or the second aspect.

[0014] In a ninth aspect, a computer program product is provided. The computer program product includes a program. The program causes a computer to perform the method of the first aspect or the second aspect.

[0015] In a tenth aspect, a computer program is provided. The computer program causes a computer to perform the method of the first aspect or the second aspect.

[0016] In the first terminal device in the embodiments of the present application, the first resource for transmitting the first message is determined according to the first configuration information before the first terminal device requests the first EDT through the first message. The first resource is one of the plurality of common PURs used for NTN communication. As can be seen, in the NTN system, the terminal device can determine the resource of the first EDT based on the contention-free manner, so as to reduce the conflict between the terminal devices. Attached Figure Description

[0017] Figure 1 shows the wireless communication system used in an embodiment of this application.

[0018] Figure 2 is a schematic diagram of the EDT process based on RACH-free.

[0019] Figure 3 is a flowchart illustrating a method for wireless communication provided in an embodiment of this application.

[0020] Figure 4 is a flowchart illustrating one possible implementation of the method shown in Figure 3.

[0021] Figure 5 is a flowchart illustrating another possible implementation of the method shown in Figure 3.

[0022] Figure 6 is a schematic diagram of an information structure for group signaling.

[0023] Figure 7 is a flowchart illustrating another method for wireless communication provided in an embodiment of this application.

[0024] Figure 8 is a schematic diagram of one possible implementation of the method shown in Figure 7.

[0025] Figure 9 is a schematic diagram of a device for wireless communication provided in an embodiment of this application.

[0026] Figure 10 is a schematic diagram of another device for wireless communication provided in an embodiment of this application.

[0027] Figure 11 is a schematic diagram of the structure of a communication device provided in an embodiment of this application. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art without creative effort regarding the embodiments of this application are within the scope of protection of this 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 can be, for example, a 6th-generation (6G) mobile communication system, or a satellite communication system, etc.

[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 involved in 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, which 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 (3rd generation partnership project, 3GPP) release 15 (release 15, Rel-15), EDT function is introduced for NB-IoT and eMTC systems. The EDT function can enable the terminal device in the radio resource control (radio resource control, RRC) idle (IDLE) mode to directly transmit data through message 3 (message 3, Msg3) in the random access process. 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 (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 (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 RACH-less EDT to reduce 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 no larger 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] For ease of understanding, the flow of RACH-less EDT is exemplarily described below in combination with FIG. 2. FIG. 2 is introduced from the perspective of 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 can 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 radio network temporary identifier (RNTI) related to the first terminal device based on configuration or 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 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 NTN RACH-less EDT. For example, when NTN RACH-less EDT is supported, the communication device can use 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. Or, the first message can be used for the first terminal device to request access. The request for access can also be called the request for RRC connection.

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

[0071] In some embodiments, the first terminal device can also perform the first EDT while requesting the first EDT. That is, the first message can include request information and to-be-transmitted data corresponding to the 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 PUR as an uplink resource shared by a plurality of terminal devices can avoid waste of resources. In some scenarios, the PUR is mainly used for transmission of PUSCH, and therefore, the PUR can also be referred to as a PUSCH resource. 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 time-frequency resources.

[0074] As an example, a plurality of preconfigured common PUR resources 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 a physical random access channel (PRACH). For example, for EDT supporting NTN without RACH, PUSCH resources corresponding to the PRACH 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 a request, 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 multiple common PURs and / or the configuration information of the multiple common PURs via a SIB. For example, a broadcast channel in the SIB can be used to broadcast the configuration information of the multiple common PURs.

[0079] As an example, the network side can send the multiple common PURs and / or the configuration information of the multiple common PURs through RRC dedicated signaling (also referred to as specific 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 the multiple common PURs in a SIB, or use RRC release (RRCRelease) to configure the multiple common PURs. As an example, the network device can broadcast the multiple common PURs in a SIB, and configure other information in the 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 the 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 the multiple common PURs.

[0083] In some embodiments, the configuration of the 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 is still necessary 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 the 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 the multiple common PURs can be applicable to the serving cell where the PUR configuration is provided.

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

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

[0088] In some embodiments, if the configuration of the multiple common PURs is provided in the 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 requesting the first EDT or performing 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 the multiple common PURs. In this scenario, there can be multiple terminal devices selecting the first resource, and the network device needs to determine whether the first terminal device selects the first resource successfully and 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 the multiple common PURs, the 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, the multiple common PURs can include multiple CFS PURs, or the multiple common PURs can be multiple CFS PURs. Since the 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, the plurality of common PURs can include a plurality of CBS PURs, or the plurality of common PURs can be a plurality of CBS PURs. Since the CBS PUR is contention-based, the plurality of terminal devices including the first terminal device can perform resource selection 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 resource is determined based on different manners. Illustratively, the plurality of terminal devices can preferentially select resources in the CFS PUR based on a non-contention manner. When the remaining resources of the CFS PUR are insufficient, the plurality of terminal devices select resources in the CBS PUR based on a contention manner. Illustratively, the plurality of terminal devices can preferentially select resources in the CBS PUR based on a contention manner. When the remaining resources of the CBS PUR are insufficient, the plurality of terminal devices select resources in the CFS PUR based on a non-contention manner.

[0094] In some embodiments, the first resource can be one of the non-contention-based PUR or one of the contention-based PUR. 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 PUR is supported, the network device needs to configure one or more CBS PURs. If non-contention-based PUR is supported, the network device needs to configure one or more CFS PURs. For example, in an NTN cell, for different coverage levels, coverage areas, and / or different carriers within the cell, a plurality of common contention-based PURs can be introduced.

[0096] In some embodiments, when the first resource is a non-contention-based 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 will be described in detail in conjunction with a plurality of embodiments.

[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 plurality of contention-based common PURs (CBS PURs). The first resource is used to transmit the EDT or the EDT request. For this manner, the network device does not know which terminal device will select which resource of the plurality of common PURs to transmit the EDT request.

[0099] To solve this problem, an 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 request of the first message is from based on the first RNTI. 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 each received EDT request is from and feedback, thereby reducing the conflict between different terminal devices.

[0100] To facilitate understanding, the following describes in detail a method for wireless communication proposed by an embodiment of the present application 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 a UE. The network device can be any one of the access network devices or core network devices described above, such as a gNB or an eNB.

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

[0102] In some embodiments, the first terminal device can be a terminal in a network with a long communication delay. Alternatively, 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. Alternatively, 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 performs sidelink transmission 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 comprise a satellite in an NTN system, and the first terminal device can be a terminal device in a cell served by the satellite. Illustratively, when the base station is deployed on the satellite, the first terminal device can directly communicate with the base station on the satellite. Illustratively, when the satellite acts 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 transmit or receive data through the satellite.

[0108] In some embodiments, the first terminal device can be 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. Illustratively, the plurality of terminal devices can each transmit the first message requesting EDT.

[0110] Referring to FIG. 3, at step S310, the first terminal device transmits the first message on the 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. Illustratively, the first message is a message 3 in a RACH-less access procedure. In the RACH-less access procedure, the first terminal device skips the transmission of message 1 and the reception of message 2 in the random access procedure, and directly transmits the message 3. Since the transmission of the message 3 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 transmitted by the first terminal device to the network device in the idle state. Therefore, the first message can be the message of the first PUSCH transmission transmitted by the first terminal device.

[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 transmit an early data request to the network device through the first message, so as 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 setup 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, such as an 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 common PURs for 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 common PURs, the plurality of common PURs can correspond to a plurality of RNTIs respectively. It should be noted that the embodiments of the present application design a new RNTI for the plurality of common PURs, 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 common PURs, so the plurality of RNTIs can be a plurality of EDT-RNTIs, or a plurality of PUR-RNTIs.

[0121] The plurality of RNTIs comprises 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 a request for the first EDT, the network device can determine that the first EDT comes from the first terminal device according to the first RNTI, to perform feedback (through a 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 a RNTI corresponding to the first resource or a RNTI in the first message. That is, the first RNTI corresponds to the first resource, or the first message includes the first RNTI. When the first RNTI corresponds to the first resource, the network device can determine, according to the first resource, that the terminal device requesting the first EDT is the first terminal device. When the first message includes the first RNTI, the network device can determine, according to the first message, that the first resource is selected or the terminal device requesting the first EDT is the first terminal device.

[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 message 4 related to CBS PUR: through network (NW) configuration or through the first terminal device itself to perform calculation determination. The network device feeds back the request or transmission of the first EDT in the first message 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 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 multiple common PURs through 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 plurality of common PURs and the first resource. Illustratively, the first RNTI is determined based on the PUSCH time-frequency resource (the 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 resource block used. When the first terminal device transmits the first message through the first resource, the first EDT-RNTI is calculated according to the first resource and saved for monitoring.

[0130] In some embodiments, the network device can also determine the first RNTI in various ways. Alternatively, 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 determines 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 transmitting 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 also calculates 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 transmits the first message on the time-frequency resource (the first resource) identified by the first RNTI can decipher the DCI of this PDCCH.

[0133] In some embodiments, the plurality of common PURs can be used for a plurality of terminal devices. The first RNTI can be determined according to the position of the first resource in the plurality of 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 x M(i) x N(i) x ulcarrier,id;

[0135] 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 index of an 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 , and 0≤s id <14.

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

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

[0140] Optionally, for a normal uplink (NUL) carrier, the value of ulcarrier,id is 0; and 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 in an NTN cell. Since the number of terminal devices in the NTN cell is very large, the plurality of terminal devices requesting EDT or the plurality of terminal devices in 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 the 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: traffic types of the plurality of terminal devices; service times of the plurality of terminal devices; location information of the plurality of terminal devices; and / or the plurality of sub-areas of the NTN cell.

[0143] As an example, a first RNTI configured by the network device is related to a 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: a traffic 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.

[0144] For ease of understanding, the following is exemplarily described in combination with a plurality of implementation manners, taking a plurality of EDT-RNTIs as an example.

[0145] As an implementation manner, the terminal device set in which the first terminal device is located can be determined according to a traffic type of the first terminal device. In this scenario, the network device divides the terminal device sets according to traffic types of the plurality of terminal devices. Correspondingly, the network side can configure EDT-RNTIs for different terminal device sets for specific purposes. For example, all EDT-RNTIs are divided into a plurality of groups, and each group corresponds to a type of traffic. When a type of traffic uses an EDT-RNTI group, the EDT-RNTI specific to the traffic type can save resources of the network device for blind decoding of a plurality of 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 traffic type of the terminal device. In this implementation manner, the network device only needs to use the EDT-RNTI group corresponding to the traffic type to blind decode the received message 3, instead of using all EDT-RNTIs for blind decoding.

[0146] As another implementation manner, the terminal device set in which the first terminal device is located can be determined according to a service time of the first terminal device. The service time of the first terminal device can represent a remaining time of the first terminal device in the current traffic or a remaining service time of the current satellite. The network device can set a plurality of service time thresholds, thereby dividing the plurality of terminal devices into a plurality of 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 a time-frequency resource located in a front time domain.

[0147] As a further implementation manner, 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 the plurality of sub-areas of the NTN cell. The NTN cell can be divided into a plurality of sub-areas (which can also be referred to as self-cells). In the NTN cell, different sub-areas have different distances from the edge of the cell. Exemplarily, a plurality of terminal devices with similar locations can be divided into a terminal device set. Exemplarily, a plurality of 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 there are sub-areas. Each sub-area is provided with an area ID. One area ID is for a group of terminal devices, and each group of terminal devices is assigned a group of EDT-RNTIs.

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

[0149] In the above implementation manner, the plurality of common PURs are respectively used for terminal devices in the plurality of sub-areas. Therefore, the plurality of sub-areas can respectively correspond to a plurality of common PUR sets. The size of the plurality of common PUR sets is determined according to the number of the plurality of sub-areas and / or the distance between each sub-area in the plurality of sub-areas and the edge of the NTN cell. Since the NTN has a large coverage range and area, the NTN can implement resource multiplexing of the plurality of terminal devices on the basis of sharing the 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 the terminal devices in the sub-area.

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

[0151] As an example, when a certain sub-area has a relatively large distance from the edge of the NTN cell, the 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 above. The size of M(i) can be related to the ID of the corresponding sub-area. The plurality of common PURs can be first evenly divided according to the number of area IDs, and then each area is divided into M average slots. The 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. When Q is 1, the resources are evenly divided.

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

[0154] In some embodiments, the network device can directly group the EDT-RNTIs, or can group the EDT-RNTIs based on the grouping of terminal devices. Optionally, when directly grouping the RNTIs, 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 allocate a group EDT-RNTI for 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, and 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, 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 EDT-RNTI(i)1, the first terminal device can send the first message based on EDT-RNTI(i)2, and sequentially request access in this order. If the first terminal device successfully sends the first message with EDT-RNTI(i)2, the base station will decode the message with all the indexes in EDT-RNTI(i). Since decoding is only performed 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: an ID of the first terminal device, a cell RNTI (C-RNTI), and a temporary mobile subscription identifier (TMSI). Either 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 the ID of the first terminal device or the TMSI. 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 the C-RNTI. Illustratively, the first terminal device will reserve the C-RNTI for a period of 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, it starts the timer T max and reserves the C-RNTI. The first message can carry the C-RNTI, the downlink feedback sent by the network device can use the C-RNTI to calculate the first RNTI, and the PDCCH scrambled by the first RNTI indicates the result of contention resolution.

[0161] Illustratively, after T max expires, the first terminal device discards the stored C-RNTI. When subsequently transitioning from the RRC idle state to the RRC connected state, the first RNTI is used to send the first message. 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 the 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, the feedback message needs to be waited for when the first terminal device requests the first EDT. In some embodiments, the feedback message also needs to be waited for after the first terminal device directly sends the to-be-transmitted data corresponding to the first EDT in the first message. 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 it is indicated by the RRC message that the network device successfully receives the UL data, 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 the contention resolution.

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

[0166] In some embodiments, the feedback message of the first EDT can be any one or more information received by the first terminal device. Exemplarily, 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. Exemplarily, when the first message requesting the first EDT is RRC EarlyDataRequest, the feedback message can be RRC EarlyDataComplete. Exemplarily, when the first message is RRCConnectionResumeRequest, the feedback message can be RRCConnectionRelease.

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

[0169] As an example, the ContentionResolution includes Msg4 ContentionResolution. The first message is message 3, and the feedback message of the first message can be Msg4 ContentionResolution. If the first RNTI carried by the Msg4 ContentionResolution is consistent with the first terminal device reported 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 through an ACK without data. The ACK can be an L1 / ACK or an L2 / ACK. Illustratively, in the PUR shared resource pool, the network device can terminate the EDT process by sending an L1 / ACK, L2 / ACK of a TA command (TA command, TAC) or RRC response message without containing data.

[0171] In some embodiments, the first terminal device can receive the feedback message of the first message based on the 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 ease of understanding, the following will be exemplarily explained in combination with FIG. 4. FIG. 4 is introduced from the perspective of the terminal device and the network device. The terminal device in FIG. 4 can be the first terminal device, and the first RNTI is EDT-RNTI. The terms explained in the foregoing will not be repeated.

[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 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 when step S420 is performed, the timer stops timing.

[0174] As shown in FIG. 4, the contention resolution timer can facilitate the terminal device to monitor the feedback message sent by the network device and perform fallback in time. 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 above.

[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 an indication of the first EDT or a successful request of the first EDT, 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 an indication of the first EDT or a successful request of the first EDT 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 EDT.

[0176] In some embodiments, the first resource can be used for part or all of the terminal devices in the first terminal device set to request the EDT. As described above, 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 a “multiplexed message 4” to multiple terminal devices, instead of sending a single message 4 respectively.

[0177] As an example, the network device can perform multiplexed 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 described illustratively 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.

[0179] Referring to FIG. 5, in step S510, the terminal device 1 and the terminal device 2 send RRC early data requests respectively and start a 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] At step S520, the network device can feed back information to terminal device 1 and terminal device 2 simultaneously through one feedback message. As shown in FIG. 5, the feedback message sent by the network device contains the message 4 of terminal device 1 and the message 4 of terminal device 2.

[0181] As an example, the network device can schedule multiple messages 4 in a single MAC PDU. The multicast message 4 (multiplexing of messages 4 of multiple terminal devices) scheduled by a single DCI or multiple messages 4 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 messages of 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, the group message can be used to send the feedback messages of all terminal devices requesting EDT in one terminal device set. The one terminal device set can be referred to as a first terminal device set. Exemplarily, the feedback message of the first EDT is one of the group messages. The group message includes the feedback messages of part or all terminal devices requesting EDT in the first terminal device set, and the part or all terminal devices include the first terminal device.

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

[0185] As an example, in NTN cell, the moving speed of terminal device can be considered as almost static relative to the moving speed of 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 service data adaptation protocol (SDAP) entity, configuration information of packet data convergence protocol (PDCP) entity, configuration information of radio link control (RLC) entity, and physical layer configuration information.

[0186] As an example, in order to receive group messages, the terminal device can perform the same network access procedure as unicast and enter the same state as after unicast network access. At 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 multiplexed group messages, 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 through blind detection of RRC signaling. The configuration information of the group, 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 re-obtained based on random access again. 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 group messages containing multiple feedback messages.

[0188] In some embodiments, 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 in a MAC service data unit (SDU).

[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. The total subheader includes the fields of E / T / R / R / BI, and the other subheaders include the fields of E / T / EDT-RNTI n. Wherein, 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: The type field is a flag indicating whether the MAC subheader contains an EDT identifier or a backoff indicator (BI). If the T field is 0, there is no BI in the subheader, and there is no overload; if the T field is 1, it indicates that all terminal devices are not satisfied in the total subheader; and in each subsequent subheader, it indicates that the corresponding terminal device does not have an EDT-RNTI.

[0194] R: The reserved field, that is, the reserved resource, can be set as an NTN area ID field or a service type identifier.

[0195] BI: Backoff field identifies overload situation in the cell, which is 4 bits (bit) in size, 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 the EDT-RNTI field is 16 bits.

[0197] In some embodiments, the first message can be transmitted based on the 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 in order to facilitate 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 the first terminal device is pre-compensated. 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: the duration of the first terminal device in idle state; the TA value stored by the first terminal device at the last TA adjustment; the maximum TA pre-compensation value of the first terminal device when it was last in connected state; the path loss and Doppler frequency offset when the first terminal device receives configuration information of multiple public PURs. The parameters determined by the above parameters to pre-compensate the first TA value can also be referred to as the compensation value of the first TA value.

[0202] As an example, the first TA value can be determined based on the duration of the idle state. The first terminal device can determine the duration of 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 a TA value stored at a previous TA adjustment. The TA value stored at the previous TA adjustment refers to a TA value stored by the first terminal device at a latest TA adjustment (e.g., in an 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 a duration of the idle state and the TA value stored at the previous TA adjustment. For example, when the duration of 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 a compensated value of the first TA value can be T delay × T TA In the NTN system, T delay × T TA may be smaller than a maximum TA value estimated based on a maximum Doppler frequency offset in the NTN cell when the first TA value is directly used as the first TA value.

[0205] As an example, the first TA value can be determined according to a maximum TA pre-compensation value at a previous connection state of the first terminal device. 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 a path loss and a Doppler frequency offset when receiving configuration information of a plurality of common PURs. The configuration information of the plurality of common PURs is, for example, configuration parameters related to the common PURs issued by the network device. For example, 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 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 the cell such as the 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 before, when the first resource is determined based on contention, there can be multiple terminal devices selecting the same resource to transmit the EDT or the EDT request. In this scenario, it can cause that some of the plurality of common PURs need to transmit a lot of messages, while some of the plurality of common PURs do not need to transmit any message.

[0210] To solve this problem, the embodiments of the present disclosure further provide a method for wireless communication. In the method, a network device configures a first resource for a first terminal device to transmit an EDT or an EDT request. Through the method, a plurality of terminal devices can transmit 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 resource waste.

[0211] For ease of understanding, the method for wireless communication is specifically described below in combination with FIG. 7. FIG. 7 is also introduced from the perspective of 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 first configuration information transmitted by the network device.

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

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

[0215] The first configuration information is used by the first terminal device to determine the first resource. As described before, the first resource is used to transmit a first message, and the first message is used to request a first EDT or perform 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 a plurality of common PUR configuration request, subscription information and / or local policy.

[0217] It should be noted that in FIG. 7, multiple common PURs are used for data transmission in the NTN. That is, this embodiment is used for wireless communication of the NTN system. When the terminal device in the NTN cell supports NTN RACH-less EDT, multiple 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 multiple common PURs; a resource index in the multiple common PURs. As described above, the first RNTI can be 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 a specific common PUR, multiple terminal devices can send message 3 at the same time. The network device can decode one or more message 3 from different terminal devices. The network device can distinguish the terminal devices through the EDT-RNTI (used for data scrambling and CRC scrambling) and / or the dedicated DMRS embedded in the message 3. Accordingly, the network device can send 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 multiple common PURs to facilitate the terminal device to determine the corresponding uplink resource.

[0222] As an example, the network device can provide a resource index in the multiple common PURs for each terminal device, so that the terminal device can determine 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 resource set index specific to the terminal device through dedicated signaling.

[0223] Continuing with FIG. 7, at step S720, the first terminal device sends a first message on a 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 comprise a first RNTI and / or a DMRS to facilitate the network device to identify. 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 public PURs, the network device does not configure corresponding uplink resources for all terminal devices in the cell.

[0226] In some embodiments, the configuration request can comprise one or more of the following information: capability information of the first terminal device; service 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 of the uplink resource to make an explicit request. For example, the first terminal device can directly inform the network device that the first message will be sent and request the network device to configure the first resource.

[0228] As an example, the first terminal device can request the network device to configure the uplink resource in an implicit manner. 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] Illustratively, the network device can determine whether to send the first configuration information according to whether the first terminal device enables the configuration related to EDT. When the first terminal device enables the configuration of RACH-less EDT, 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 configuration of RACH-less EDT, the network device does not configure the uplink resource for the first terminal device and thus does not send the first configuration information.

[0230] Illustratively, the first terminal device can use its own capability information to support the function of enabling or disabling the configuration of EDT. If the capability information of the first terminal device shows that the first terminal device does not have the function of enabling the configuration of EDT, 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 comprise a first indication. The first indication is used to indicate that ACK or negative acknowledgement (NACK) feedback is enabled for the EDT related transmission. The first indication is, for example, "RRC ACK".

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

[0233] As an example, the EDT related transmission can comprise 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-free 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 sending a configuration request. As an example, when the NTN cell where the first terminal device is located comprises multiple terminal devices requesting EDT, multiple common PURs are allocated to the multiple terminal devices. As an example, 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 for the first EDT or for requesting the first EDT. As an example, when the multiple common PURs are allocated to each terminal device requesting resources based on the base station, the allocation can be based on the service type of the terminal device.

[0236] In some embodiments, the network device can allocate resources based on the resources requested by the multiple terminal devices or the resources required by the multiple terminal devices.

[0237] As an example, the resources requested by the multiple 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 multiple common PURs can be divided equally. 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, multiple terminal devices can have different sizes of resource requirements. Illustratively, the network device can allocate resources according to the sizes of the resources requested by the multiple terminal devices. For example, the number of allocable resources in multiple 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 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 sizes of the resources simultaneously applied for, for example, S0≥S1≥…≥SK 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 a resource of S i , and the network device allocates a resource of Rsi to the terminal device i. If Rsi≥S i , the network device allocates a resource of 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 a resource to the first terminal device that is greater than or equal to the resource 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 a resource to the first terminal device that is less than the resource 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 resource is greater than or equal to the resource requested by the first terminal device, the first EDT is successful; or when the first resource is less than the resource requested by the first terminal device, the first EDT is unsuccessful.

[0242] As an example, the multiple common PUR resources reserved by the network device can be allocated in turn according to the sizes of the resources applied for by the terminal devices. If the terminal device j applies for a resource of S j , and the allocable resource Rsj<S j , the message 3 access fails. From the perspective of the network device, each terminal device that needs EDT transmission will have 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 times out, 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, and 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 when the second timer is running, 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, that is, 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 normal flow data transmission.

[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 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 on 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 (RRCRelease including UE-specific configuration on RACH-less EDT). 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 (UE in RRC idle initiates 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 the 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 above describes the method for determining the uplink resource based on contention for multiple terminal devices requesting EDT in combination with FIG. 7 and FIG. 8. Through the method, the problem of resource utilization imbalance that can occur in multiple 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 multiple common PURs corresponding to the terminal device set in which the first terminal device is located are determined based on the contention-free manner. Within the terminal device set, the first terminal device determines the first resource from the multiple common PURs based on the contention manner.

[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 a 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 in a contention-based manner.

[0260] In some embodiments, the plurality of common PURs can be divided into a plurality of resource pools. Among the plurality of resource pools, the resource pool corresponding to the terminal device is determined in a contention-free manner based on 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 resources in a contention-based manner.

[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 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: the signal quality of the configuration request sent by the plurality of terminal devices; the CE level of the location where the plurality of terminal devices are located; the service time of the service of the plurality of terminal devices; and the 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 the energy detection result.

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

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

[0265] As an example, the plurality of resource pools can be divided based on a 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 the 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 the 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 the first resource in the resource pool corresponding to the first value range.

[0267] As an example, the plurality of resource pools can be determined according to the CE level and the 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 the CE level from 0 to 3 is gradually deteriorating. CE level 0 represents the best channel quality scenario; CE level 3 represents the worst channel quality scenario. Based on the RSRP values of different CE levels, the threshold values of the shared resource pool are set respectively, that is, the entire resource pool of the common PUR is divided into 4 parts, that is, 4 resource pools. Each part can correspond to a threshold value of RSRP: RSRP1, RSRP2, RSRP3, 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. Exemplarily, the first terminal device can select the carrier based on a probability factor.

[0269] As an example, the plurality of resource pools can be determined according to both the result of energy detection and the service time of traffic. Illustratively, the plurality of common PURs are first divided into two blocks according to the result of energy detection. Specifically, a basic RSRP threshold of 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 a terminal device, and the RSRP of the request signal is greater than or equal to the threshold, and / or, the service time is outside T-service, the terminal device can use the plurality of common PURs, and is allocated to a specific resource block subset A. When the network receives a request signal from a terminal device, and the RSRP of the request signal is less than the threshold, and / or, the service time is within T-service, the terminal device can use the plurality of 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 traffic 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 position of the first resource pool is earlier than the time domain position of the second resource pool. When the service time of traffic 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 traffic 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 of traffic is within T-service, the traffic of the first terminal device is not urgent, and the plurality of common PURs can be preferentially used by other terminal devices whose service time of traffic 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. Exemplarily, 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 type of service. The system can allocate a fairness factor to each type of service according to the service priority. If the maximum resource allocated to all services is (MxN) / L, the resource allocated to service type j is: j 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 will be 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 present application. The apparatus 900 can be any one of the first terminal devices described above. The apparatus 900 shown in FIG. 9 includes a receiving unit 910 and a sending unit 920.

[0277] The receiving unit 910 can be configured to receive first configuration information, the first configuration information being used by the first terminal device to determine a first resource.

[0278] The sending unit 920 can be configured to send a first message on the first resource, the first message being used to request a first EDT; wherein the first resource is one of a plurality of common PURs, the plurality of common PURs being used for data transmission in the NTN.

[0279] Optionally, the first configuration information is carried in a SIB or RRC dedicated signaling.

[0280] Optionally, the first configuration information is used to indicate one or more of the following: a first RNTI corresponding to the first terminal device; a resource of a 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.

[0281] Optionally, the first message comprises the first RNTI and / or the DMRS.

[0282] Optionally, the sending unit 920 is further configured to send a configuration request to the network device; wherein the configuration request is used to request the network device to send the first configuration information.

[0283] Optionally, the configuration request comprises one or more of the following information: capability information of the first terminal device; a service type of the first terminal device; and a configuration related to whether the first terminal device enables EDT.

[0284] Optionally, the configuration request further comprises a first indication, the first indication being used to indicate that the transmission related to EDT enables ACK / NACK feedback.

[0285] Optionally, the NTN cell in which the first terminal device is located comprises a plurality of terminal devices requesting EDT, the plurality of common PURs are allocated to the plurality of terminal devices, and the first configuration information is used to indicate a plurality of resources corresponding to the plurality of terminal devices respectively.

[0286] Optionally, when the first resource is greater than or equal to the resource requested by the first terminal device, the first EDT is successful; or when the first resource is less than the resource requested by the first terminal device, the first EDT is unsuccessful.

[0287] Optionally, the apparatus 900 further comprises a first processing unit configured to start a second timer when the first EDT is unsuccessful; and a second processing unit configured to perform retransmission of the first message or a random access procedure when the second timer is counted down.

[0288] Optionally, the plurality of common PURs are divided into a plurality of resource pools, the first configuration information is used to indicate a first resource pool in which the first resource is located, and the apparatus 900 further comprises a determining unit configured to determine the first resource in the first resource pool based on a contention manner.

[0289] Optionally, the first terminal device is one of a plurality of terminal devices, and the plurality of resource pools are determined according to one or more of the following information: signal quality of configuration requests sent by the plurality of terminal devices; coverage enhancement level of locations where the plurality of terminal devices are located; service time of services of the plurality of terminal devices; and service types of the plurality of terminal devices.

[0290] Optionally, the determining unit is further configured to determine the first resource in the plurality of resource pools when a signal quality of the configuration request sent by the first terminal device is greater than a first threshold.

[0291] Optionally, 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, a time domain position of the first resource pool is earlier than a time domain position of the second resource pool, and the determining unit is further configured to determine the first resource on the first resource pool when a service time of the first terminal device is outside a service time of the first NTN cell, or determine the first resource on the second resource pool when the service time of the first terminal device is within the service time of the first NTN cell.

[0292] Optionally, the NTN cell where the first terminal device is located supports L types of services, and the plurality of resource pools are L resource pools, and a size of each resource pool in the L resource pools is determined according to a service priority.

[0293] Optionally, the receiving unit 910 and the sending 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.

[0294] 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 sending unit 1010 and a receiving unit 1020.

[0295] The sending unit 1010 can be configured to send first configuration information, the first configuration information being used by the first terminal device to determine a first resource.

[0296] The receiving unit 1020 can be configured to receive a first message sent by the first terminal device on the first resource, the first message being used to request a first EDT, wherein the first resource is one of a plurality of common PURs, and the plurality of common PURs are used for data transmission in the NTN.

[0297] Optionally, the first configuration information is carried in a SIB or RRC dedicated signaling.

[0298] Optionally, the first configuration information is used to indicate one or more of the following: a first RNTI corresponding to the first terminal device; a resource of a DMRS corresponding to the first terminal device; an allocation manner of the plurality of common PURs; and a resource index in the plurality of common PURs.

[0299] Optionally, the first message includes the first RNTI and / or the DMRS.

[0300] Optionally, the receiving unit 1020 is further configured to receive a configuration request sent by the first terminal device; wherein the configuration request is used to request the network device to send the first configuration information.

[0301] Optionally, the configuration request comprises one or more of the following information: capability information of the first terminal device; service type of the first terminal device; and related configuration of whether the first terminal device enables EDT.

[0302] Optionally, the configuration request further comprises a first indication, and the first indication is used to indicate that the EDT-related transmission enables ACK / NACK feedback.

[0303] Optionally, the NTN cell where the first terminal device is located comprises a plurality of terminal devices requesting EDT, a plurality of common PURs are allocated to the plurality of terminal devices, and the first configuration information is used to indicate a plurality of resources corresponding to the plurality of terminal devices respectively.

[0304] Optionally, when the first resource is greater than or equal to the resource requested by the first terminal device, the first EDT is successful; or when the first resource is less than the resource requested by the first terminal device, the first EDT is unsuccessful.

[0305] Optionally, the receiving unit 1020 is further configured to receive retransmission of the first message or a random access request when the first EDT is unsuccessful.

[0306] Optionally, the plurality of common PURs are divided into a plurality of resource pools, the first configuration information is used to indicate a first resource pool where the first resource is located, and the first resource is determined by the first terminal device in the first resource pool based on contention.

[0307] Optionally, the first terminal device is one of a plurality of terminal devices, and the plurality of resource pools are determined according to one or more of the following information: signal quality of the configuration request sent by the plurality of terminal devices; coverage enhancement level of the location where the plurality of terminal devices are located; service time of the service of the plurality of terminal devices; and service type of the plurality of terminal devices.

[0308] Optionally, the sending unit 1010 is further configured to send the first configuration information to the first terminal device when the signal quality of the configuration request sent by the first terminal device is greater than a first threshold.

[0309] Optionally, the first terminal device corresponds to a first NTN cell, the plurality of resource pools comprise a first resource pool and a second resource pool, a time domain position of the first resource pool is earlier than a time domain position of the second resource pool, when service time of the service of the first terminal device is outside the service time of the first NTN cell, the first resource is on the first resource pool; or when the service time of the service of the first terminal device is within the service time of the first NTN cell, the first resource is on the second resource pool.

[0310] Optionally, the NTN cell in which the first terminal device is located supports L service types, and the plurality of resource pools are L resource pools, and a size of each resource pool in the L resource pools is determined according to a service priority.

[0311] Optionally, the sending unit 1010 and the receiving 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.

[0312] FIG. 11 shows a structural 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 foregoing method embodiments. The apparatus 1100 can be a chip, a terminal device, or a network device.

[0313] The apparatus 1100 can include one or more processors 1110. The processor 1110 can support the apparatus 1100 to implement the method described in the foregoing method embodiments. The processor 1110 can be a general-purpose processor or a dedicated processor. For example, the processor can be a central processing unit (CPU). Alternatively, the processor can also be other general-purpose 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-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0314] The apparatus 1100 can further include one or more memories 1120. The memory 1120 stores a program, which can be executed by the processor 1110, so that the processor 1110 performs the method described in the foregoing method embodiments. The memory 1120 can be independent of the processor 1110 or integrated in the processor 1110.

[0315] The apparatus 1100 can further 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.

[0316] The embodiment of the present application further provides 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 embodiment of the present application, and the program causes a computer to execute the method performed by the terminal device or the network device in the various embodiments of the present application. The computer readable storage medium can be any available medium or a data storage device such as a server, data center, etc. integrated with one or more available medium. 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 (digital video disc, DVD)) or a semiconductor medium (for example, a solid state disk (solid state disk, SSD)) and the like.

[0317] The embodiment of the present application further provides a computer program product. The computer program product includes 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 a computer to execute the method performed by the terminal device or the network device in the various embodiments of the present application.

[0318] In the above embodiment, all or part of the embodiment can be realized by software, hardware, firmware or any combination thereof. When realized by software, all or part of the embodiment can be realized in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiment of the present application are generated. 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 transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center through wired (for example, coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (for example, infrared, wireless, microwave, etc.).

[0319] 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 a computer to execute the method performed by the terminal device or the network device in the various embodiments of the present application.

[0320] The terms "system" and "network" can be used interchangeably in this application. In addition, the terms used in this application are only used to explain the specific embodiments of the application, and are not intended to limit the application. The terms "first", "second", "third", and "fourth" and the like in the specification and claims of the application and the drawings are used to distinguish different objects, and are not used to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0321] In embodiments of the present application, the term "indicate" can be direct indication or indirect indication, or can represent an associated relationship. For example, A indicates B, which can mean that B can be obtained by A; or A indirectly indicates B, for example, A indicates C, and B can be obtained by C; or A and B have an associated relationship.

[0322] In embodiments of the present application, the term "corresponding" can represent a direct or indirect relationship between the two, or an associated relationship between the two, or an indication and the indicated, configuration and the configured relationship.

[0323] In embodiments of the present application, "predefined" or "preconfigured" can be realized by pre-saving corresponding codes, tables or other means for indicating related information in devices (such as 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.

[0324] In embodiments of the present application, determining B according to A does not mean that B is determined only according to A, but B can also be determined according to A and / or other information.

[0325] In embodiments of the present application, the term "and / or" is only a description of the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in this paper generally represents an "or" relationship between the associated objects before and after it.

[0326] In 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 by their functions and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0327] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other manners. For example, the embodiments of the device described above are merely schematic, and the division of the units is merely logical function division. There can be other division manners in actual implementation, for example, multiple 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 in electrical, mechanical or other forms.

[0328] The units described as separated components can or can not be physically separated, and the components displayed as units can or can not be physical units, i.e., can be located in one place, or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purposes of the embodiments of the present application.

[0329] In addition, each functional unit in the embodiments of the present application can be integrated in a processing unit, or each unit can exist physically as a separate unit, or two or more units can be integrated in one unit.

[0330] The above describes only specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope 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, comprising: The method comprises: a first terminal device receiving first configuration information, the first configuration information being used by the first terminal device to determine a first resource; the first terminal device sending a first message on the first resource, the first message being used to request a first early data transmission (EDT); wherein the first resource is one of a plurality of common preconfigured uplink resources (PURs), and the plurality of common PURs are used for data transmission in a non-terrestrial network (NTN).

2. The method of claim 1, wherein, The first configuration information is carried in a system information block (SIB) or radio resource control (RRC) dedicated signaling.

3. The method according to claim 1 or 2, characterized in that, The first configuration information is used to indicate one or more of the following: a first radio network temporary identifier (RNTI) corresponding to the first terminal device; a resource of a demodulation reference signal (DMRS) corresponding to the first terminal device; an allocation mode of the plurality of common PURs; a resource index in the plurality of common PURs.

4. The method of claim 3, wherein, The first message comprises the first RNTI and / or the DMRS.

5. The method according to any one of claims 1 to 4, characterized in that, The method further comprises: the first terminal device sending a configuration request to a network device; wherein the configuration request is used to request the network device to send the first configuration information.

6. The method of claim 5, wherein, The configuration request comprises one or more of the following information: capability information of the first terminal device; a service type of the first terminal device; a related configuration of whether the first terminal device enables the EDT.

7. The method according to claim 5 or 6, characterized in that, The configuration request further comprises a first indication, the first indication being used to indicate that the EDT-related transmission enables acknowledgement (ACK) / negative acknowledgement (NACK) feedback.

8. The method according to any one of claims 1-7, characterized in that, The NTN cell in which the first terminal device is located comprises a plurality of terminal devices that request the EDT, the plurality of common PURs are allocated to the plurality of terminal devices, and the first configuration information is used to indicate a plurality of resources respectively corresponding to the plurality of terminal devices.

9. The method according to any one of claims 1-8, characterized in that, When the first resource is greater than or equal to a resource requested by the first terminal device, the first EDT is successful; or when the first resource is less than the resource requested by the first terminal device, the first EDT is unsuccessful.

10. The method according to any one of claims 1-9, characterized in that, The method further comprises: when the first EDT is unsuccessful, the first terminal device starts a second timer; when the second timer finishes counting, the first terminal device performs retransmission of the first message or a random access process.

11. The method according to any one of claims 1-7, characterized in that, The plurality of common PURs are divided into a plurality of resource pools, the first configuration information is used to indicate a first resource pool in which the first resource is located, and the method further comprises: the first terminal device determining the first resource in a contention-based manner in the first resource pool.

12. The method of claim 11, wherein, The first terminal device is one of a plurality of terminal devices, and the plurality of resource pools are determined according to one or more of the following information: a signal quality of a configuration request sent by the plurality of terminal devices; a coverage enhancement level of a location where the plurality of terminal devices are located; a service time of a service of the plurality of terminal devices; a service type of the plurality of terminal devices.

13. The method according to claim 11 or 12, characterized in that, The method further comprises: when a signal quality of a configuration request sent by the first terminal device is greater than a first threshold, the first terminal device determines the first resource in the plurality of resource pools.

14. The method according to any one of claims 11-13, characterized in that, 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, a time domain position of the first resource pool is earlier than a time domain position of the second resource pool, and the method further includes: When service time of the first terminal device is outside service time of the first NTN cell, the first terminal device determines the first resource on the first resource pool; or When service time of the first terminal device is within service time of the first NTN cell, the first terminal device determines the first resource on the second resource pool.

15. The method of claim 11 or 12, wherein, The NTN cell where the first terminal device is located supports L types of services, and the plurality of resource pools are L resource pools, and a size of each resource pool in the L resource pools is determined according to a service priority.

16. A method for wireless communication, comprising: The method further includes: The network device sends first configuration information, and the first configuration information is used by the first terminal device to determine a first resource; The network device receives a first message sent by the first terminal device on the first resource, and the first message is used to request a first early data transmission (EDT); The first resource is one of a plurality of common preconfigured uplink resources (PURs), and the plurality of common PURs are used for data transmission in a non-terrestrial network (NTN).

17. The method of claim 16, wherein, The first configuration information is carried in a system information block (SIB) or radio resource control (RRC) dedicated signaling.

18. The method of claim 16 or 17, wherein, The first configuration information is used to indicate one or more of the following: A first radio network temporary identifier (RNTI) corresponding to the first terminal device; A resource of a demodulation reference signal (DMRS) corresponding to the first terminal device; An allocation mode of the plurality of common PURs; A resource index in the plurality of common PURs.

19. The method of claim 18, wherein, The first message includes the first RNTI and / or the DMRS.

20. The method of any one of claims 16-19, wherein, The method further includes: The network device receives a configuration request sent by the first terminal device; The configuration request is used to request the network device to send the first configuration information.

21. The method of claim 20, wherein, The configuration request includes one or more of the following information: Capability information of the first terminal device; A service type of the first terminal device; Related configuration of whether the first terminal device enables the EDT.

22. The method of claim 20 or 21, wherein, The configuration request further includes a first indication, and the first indication is used to indicate that the EDT-related transmission enables acknowledgement (ACK) / negative acknowledgement (NACK) feedback.

23. The method of any one of claims 16-22, wherein, The NTN cell where the first terminal device is located includes a plurality of terminal devices that request the EDT, the plurality of common PURs are allocated to the plurality of terminal devices, and the first configuration information is used to indicate a plurality of resources respectively corresponding to the plurality of terminal devices.

24. The method of any one of claims 16-23, wherein, When the first resource is greater than or equal to a resource requested by the first terminal device, the first EDT is successful; or when the first resource is less than the resource requested by the first terminal device, the first EDT is unsuccessful.

25. The method of any one of claims 16-24, wherein, The method further includes: When the first EDT is unsuccessful, the network device receives retransmission of the first message or a random access request.

26. The method of any one of claims 16-25, wherein, The plurality of common PURs are divided into a plurality of resource pools, and the first configuration information is used to indicate a first resource pool in which the first resource is located, and the first resource is determined by the first terminal device in the first resource pool in a contention-based manner.

27. The method of claim 26, wherein, The first terminal device is one of a plurality of terminal devices, and the plurality of resource pools are determined according to one or more of the following information: Signal quality of a configuration request sent by the plurality of terminal devices; Coverage enhancement level of a location where the plurality of terminal devices are located; Service time of services of the plurality of terminal devices; Service type of the plurality of terminal devices.

28. The method of claim 26 or 27, wherein, The method further includes: When the signal quality of the configuration request sent by the first terminal device is greater than a first threshold, the network device sends the first configuration information to the first terminal device.

29. The method of any one of claims 26-28, wherein, 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, a time domain location of the first resource pool is earlier than a time domain location of the second resource pool, when service time of services of the first terminal device is outside service time of the first NTN cell, the first resource is on the first resource pool; or, when the service time of the services of the first terminal device is within the service time of the first NTN cell, the first resource is on the second resource pool.

30. The method of claim 26 or 27, wherein, The NTN cell where the first terminal device is located supports L service types, and the plurality of resource pools are L resource pools, and a size of each resource pool in the L resource pools is determined according to a service priority.

31. An apparatus for wireless communication, the apparatus comprising: The apparatus is a first terminal device, and the apparatus includes: A receiving unit configured to receive first configuration information, the first configuration information being used by the first terminal device to determine a first resource; A sending unit configured to send a first message on the first resource, the first message being used to request a first early data transmission (EDT); The first resource is one of a plurality of common preconfigured uplink resources (PURs), and the plurality of common PURs are used for data transmission in a non-terrestrial network (NTN).

32. The apparatus of claim 31, wherein, The first configuration information is carried in a system information block (SIB) or radio resource control (RRC) dedicated signaling.

33. The apparatus of claim 31 or 32, wherein, The first configuration information is used to indicate one or more of the following: A first radio network temporary identifier (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.

34. The apparatus of claim 33, wherein, The first message includes the first RNTI and / or the DMRS.

35. The apparatus of any one of claims 31-34, wherein, The sending unit is further configured to send a configuration request to a network device, and the configuration request is used to request the network device to send the first configuration information.

36. The device of claim 35, wherein, The configuration request includes one or more of the following information: Capability information of the first terminal device; Service type of the first terminal device; Related configuration of whether the first terminal device enables the EDT.

37. The apparatus of claim 35 or 36, wherein, The configuration request further includes a first indication, and the first indication is used to indicate that the EDT-related transmission enables an acknowledgement (ACK) / negative acknowledgement (NACK) feedback.

38. The apparatus of any one of claims 31-37, wherein, The NTN cell where the first terminal device is located includes a plurality of terminal devices requesting EDT, the plurality of common PURs are allocated to the plurality of terminal devices, and the first configuration information is used to indicate a plurality of resources corresponding to the plurality of terminal devices respectively.

39. The device of any of claims 31-38, wherein, When the first resource is greater than or equal to the resource requested by the first terminal device, the first EDT is successful; or when the first resource is less than the resource requested by the first terminal device, the first EDT is unsuccessful.

40. The device of any one of claims 31-39, wherein, The apparatus further includes: A first processing unit configured to start a second timer when the first EDT is unsuccessful; A second processing unit configured to perform retransmission of the first message or a random access procedure when the second timer expires.

41. The device of any one of claims 31-37, wherein, The plurality of common PURs are divided into a plurality of resource pools, the first configuration information is used to indicate a first resource pool where the first resource is located, and the apparatus further includes: A determination unit configured to determine the first resource in a contention-based manner in the first resource pool.

42. The device of claim 41, wherein, The first terminal device is one of a plurality of terminal devices, and the plurality of resource pools are determined according to one or more of the following information: Signal quality of a configuration request sent by the plurality of terminal devices; Coverage enhancement level of a location where the plurality of terminal devices are located; Service time of services of the plurality of terminal devices; Service type of the plurality of terminal devices.

43. The device of claim 41 or 42, wherein, The determination unit is further configured to determine the first resource in the plurality of resource pools when the signal quality of the configuration request sent by the first terminal device is greater than a first threshold.

44. The device of any one of claims 41-43, wherein, 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, a time domain position of the first resource pool is earlier than a time domain position of the second resource pool, and the determination unit is further configured to: Determine the first resource on the first resource pool when service time of services of the first terminal device is outside service time of the first NTN cell; or Determine the first resource on the second resource pool when service time of services of the first terminal device is within service time of the first NTN cell.

45. The device of claim 41 or 42, wherein, The NTN cell where the first terminal device is located supports L service types, the plurality of resource pools are L resource pools, and a size of each resource pool in the L resource pools is determined according to a service priority.

46. An apparatus for wireless communication, the apparatus comprising: The apparatus is a network device, and the apparatus includes: A sending unit configured to send first configuration information, the first configuration information being used by a first terminal device to determine a first resource; A receiving unit configured to receive a first message sent by the first terminal device on the first resource, the first message being used to request first early data transmission (EDT); The first resource is one of a plurality of common preconfigured uplink resources (PURs), and the plurality of common PURs are used for data transmission in a non-terrestrial network (NTN).

47. The device of claim 46, wherein, The first configuration information is carried in a system information block (SIB) or radio resource control (RRC) dedicated signaling.

48. The device of claim 46 or 47, wherein, The first configuration information is used to indicate one or more of the following: A first radio network temporary identifier (RNTI) corresponding to the first terminal device; A demodulation reference signal (DMRS) resource corresponding to the first terminal device; A manner of allocating the plurality of common PURs; A resource index in the plurality of common PURs.

49. The device of claim 48, wherein, The first message includes the first RNTI and / or the DMRS.

50. The device of any one of claims 46-49, wherein, The receiving unit is further configured to receive a configuration request sent by the first terminal device, where the configuration request is used to request the network device to send the first configuration information.

51. The device of claim 50, wherein, The configuration request includes one or more of the following information: Capability information of the first terminal device; A service type of the first terminal device; Configuration related to whether the first terminal device enables the EDT.

52. The device of claim 50 or 51, wherein, The configuration request further includes a first indication, where the first indication is used to indicate that the EDT-related transmission enables acknowledgement (ACK) / negative acknowledgement (NACK) feedback.

53. The device of any one of claims 46-52, wherein, The NTN cell in which the first terminal device is located includes a plurality of terminal devices that request the EDT, the plurality of common PURs are allocated to the plurality of terminal devices, and the first configuration information is used to indicate a plurality of resources corresponding to the plurality of terminal devices respectively.

54. The device of any one of claims 46-53, wherein, When the first resource is greater than or equal to the resource requested by the first terminal device, the first EDT is successful; or when the first resource is less than the resource requested by the first terminal device, the first EDT is unsuccessful.

55. The device of any one of claims 46-54, wherein, The receiving unit is further configured to receive retransmission of the first message or a random access request when the first EDT is unsuccessful.

56. The device of any one of claims 46-55, wherein, The plurality of common PURs are divided into a plurality of resource pools, the first configuration information is used to indicate a first resource pool in which the first resource is located, and the first resource is determined by the first terminal device in the first resource pool based on contention.

57. The device of claim 56, wherein, The first terminal device is one of a plurality of terminal devices, and the plurality of resource pools are determined according to one or more of the following information: Signal quality of a configuration request sent by the plurality of terminal devices; A coverage enhancement level of a location where the plurality of terminal devices are located; Service time of a service of the plurality of terminal devices; A service type of the plurality of terminal devices.

58. The device of claim 56 or 57, wherein, The sending unit is further configured to send the first configuration information to the first terminal device when signal quality of the configuration request sent by the first terminal device is greater than a first threshold.

59. The device of any one of claims 56-58, wherein, 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, a time domain location of the first resource pool is earlier than a time domain location of the second resource pool, the first resource is on the first resource pool when service time of a service of the first terminal device is outside service time of the first NTN cell, or the first resource is on the second resource pool when the service time of the service of the first terminal device is within the service time of the first NTN cell.

60. The device of claim 56 or 57, wherein, The NTN cell in which the first terminal device is located supports L service types, the plurality of resource pools are L resource pools, and a size of each resource pool in the L resource pools is determined according to a service priority.

61. A communications device, characterized by A computer program product comprising a memory for storing a program and a processor for invoking the program in the memory to perform the method of any of claims 1-30.

62. An apparatus comprising: A computer program product comprising a processor for invoking a program from a memory to perform the method of any of claims 1-30.

63. A chip, comprising: A computer program product comprising a processor for invoking a program from a memory to cause a device in which the chip is installed to perform the method of any of claims 1-30.

64. A computer-readable storage medium, characterized in that, A computer program product comprising a program that causes a computer to perform the method of any of claims 1-30.

65. A computer program product, characterised in that, A computer program product comprising a program that causes a computer to perform the method of any of claims 1-30.

66. A computer program characterised in that, The computer program product causes a computer to perform the method of any of claims 1-30.

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