Wireless communication method, terminal device and network device

Abstract

The embodiment of the application provides a wireless communication method, a terminal device and a network device, and the method comprises the following steps: a terminal device acquires first configuration information of the terminal device, and the first configuration information is used for determining a first random access type of the terminal device; and the terminal device performs random access according to the first random access type, so that the reliability of the random access can be improved.

Description

Technical Field

[0001] This application relates to the field of communications, and more specifically, to a wireless communication method, terminal device, and network device. Background Technology

[0002] Currently, there are contention-based and non-contention-based random access methods. Contention-based random access includes contention-based four-step random access and contention-based two-step random access. Before accessing the network, the terminal device must first select the random access type. In New Radio (NR) systems, the terminal device selects the random access type based on the Reference Signal Received Power (RSRP) measurement. When the RSRP measured by the terminal device is higher than the RSRP threshold configured by the network, the terminal device uses two-step random access; otherwise, the terminal device uses four-step random access.

[0003] In non-terrestrial networks (NTN) systems, the long distances between satellites and ground gateways / terminal devices exacerbate the latency of random access procedures. Employing a two-step random access method effectively reduces network latency. However, the "near-far effect" is less pronounced in NTN systems. Because network devices are geographically distant from terminal devices, the measured RSRP (Reliability, Reliability, and Presence) differences are not significant for devices at different locations. Therefore, using the random access type determination method employed in NR (Non-Terrestrial Networks) systems makes it difficult to determine the correct random access type, thus reducing the reliability of random access. Summary of the Invention

[0004] This application provides a wireless communication method for a terminal device and a network device, which can determine the random access type of the terminal device and thereby improve the reliability of random access.

[0005] In a first aspect, a wireless communication method is provided, comprising: a terminal device acquiring first configuration information of the terminal device, the first configuration information being used to determine a first random access type of the terminal device; and the terminal device performing random access according to the first random access type.

[0006] In a second aspect, a wireless communication method is provided, comprising: a network device sending first configuration information of the terminal device to a terminal device, the first configuration information being used to determine a first random access type of the terminal device.

[0007] Thirdly, a terminal device is provided for executing the methods described in the first aspect or its various implementations.

[0008] Specifically, the terminal device includes a functional module for performing the methods described in the first aspect or its various implementations.

[0009] Fourthly, a network device is provided for performing the methods described in the second aspect or its various implementations.

[0010] Specifically, the network device includes a functional module for performing the methods described in the second aspect or its various implementations.

[0011] Fifthly, a terminal device is provided, including a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to perform the methods described in the first aspect or its various implementations.

[0012] In a sixth aspect, a network device is provided, including a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to perform the methods in the second aspect or its implementations described above.

[0013] In a seventh aspect, an apparatus is provided for implementing the method in any one of the first to second aspects or in any of their implementations.

[0014] Specifically, the device includes a processor for calling and running a computer program from memory, causing a device equipped with the device to perform the method as described in any of the first to second aspects or their respective implementations.

[0015] Eighthly, a computer-readable storage medium is provided for storing a computer program that causes a computer to perform the methods of any one of the first to second aspects or their respective implementations.

[0016] Ninthly, a computer program product is provided, including computer program instructions that cause a computer to perform the methods of any one of the first to second aspects or their respective implementations.

[0017] In a tenth aspect, a computer program is provided that, when run on a computer, causes the computer to perform the methods of any one of the first to second aspects or their respective implementations.

[0018] Through the above technical solution, the terminal device can determine the first random access type based on the first configuration information. Since the network device either directly carries the first random access type in the first configuration information, or the terminal device determines the first random access type based on any one of the first logical channel list, the second logical channel list, and the above correspondence, and the logical channel where the BSR triggered by the uplink data of the terminal device is located, this method can be independent of the RSRP measured by the terminal device or not only independent of the RSRP measured by the terminal device. That is to say, even if the "near-far effect" is not obvious in the NTN system, it will not lead to the inability to determine the first random access type, thereby improving the reliability of random access and effectively utilizing two-step random access to reduce access latency. Attached Figure Description

[0019] Figure 1A This application provides a schematic diagram of the architecture of a communication system.

[0020] Figure 1B This is a schematic diagram of the architecture of another communication system provided in an embodiment of this application;

[0021] Figure 2 This is a flowchart illustrating the four-step random access process based on competition.

[0022] Figure 3 It is a flowchart of a non-contested four-step random access process;

[0023] Figure 4A It is a flowchart of a two-step random access process based on competition.

[0024] Figure 4B It is a flowchart of a non-competitive two-step random access process;

[0025] Figure 5 This is a schematic diagram of the "near-far effect" in an NR system;

[0026] Figure 6 This is a schematic diagram of the "near-far effect" in an NTN system.

[0027] Figure 7 An interactive flowchart of a wireless communication method provided in an embodiment of this application;

[0028] Figure 8 A schematic block diagram of a terminal device 800 according to an embodiment of this application is shown;

[0029] Figure 9 A schematic block diagram of a network device 900 according to an embodiment of this application is shown;

[0030] Figure 10This is a schematic structural diagram of a communication device 1000 provided in an embodiment of this application;

[0031] Figure 11 This is a schematic structural diagram of the device according to an embodiment of this application;

[0032] Figure 12 This is a schematic block diagram of a communication system 1200 provided in an embodiment of this application. Detailed Implementation

[0033] 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.

[0034] The technical solutions of this application embodiment can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) system, NR system, evolution system of NR system, LTE-based access to unlicensed spectrum (LTE-U) system, NR-based access to unlicensed spectrum (NR-U) system, NTN system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), 5th Generation (5G) system, or other communication systems, etc.

[0035] Traditional communication systems typically support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communication but also, for example, device-to-device (D2D) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), vehicle-to-vehicle (V2V) communication, or vehicle-to-everything (V2X) communication. The embodiments of this application can also be applied to these communication systems.

[0036] Optionally, the communication system in this application embodiment can be applied to a carrier aggregation (CA) scenario, a dual connectivity (DC) scenario, or a standalone (SA) network deployment scenario.

[0037] Optionally, the embodiments of this application can be applied to unlicensed spectrum or licensed spectrum. Unlicensed spectrum can also be considered as shared spectrum, and licensed spectrum can also be considered as non-shared spectrum.

[0038] Optionally, the embodiments of this application can be applied to NTN systems or terrestrial networks (TN) systems.

[0039] This application describes various embodiments in conjunction with network devices and terminal devices, wherein: the terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device, etc. The terminal device may be a station (STAION, ST) in a WLAN, a cellular phone, cordless phone, Session Initiation Protocol (SIP) phone, Wireless Local Loop (WLL) station, Personal Digital Assistant (PDA) device, handheld device with wireless communication capabilities, computing device or other processing device connected to a wireless modem, vehicle-mounted device, wearable device, and next-generation communication system, such as terminal device in an NR network or terminal device in a future evolved Public Land Mobile Network (PLMN) network, etc.

[0040] In the embodiments of this application, the terminal device can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; it can also be deployed on water (such as ships); and it can also be deployed in the air (such as airplanes, balloons and satellites).

[0041] In the embodiments of this application, the terminal device may be a mobile phone, tablet computer, computer with wireless transceiver capabilities, virtual reality (VR) terminal device, augmented reality (AR) terminal device, wireless terminal in industrial control, vehicle-mounted terminal device, wireless terminal in self-driving, wireless terminal in remote medical care, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, wearable terminal device, etc. The terminal device involved in the embodiments of this application may also be referred to as a terminal, user equipment (UE), access terminal device, vehicle-mounted terminal, industrial control terminal, UE unit, UE station, mobile station, mobile station, remote station, remote terminal device, mobile device, UE terminal device, wireless communication device, UE agent, or UE device, etc. The terminal device may also be fixed or mobile.

[0042] By way of example and not limitation, in this embodiment, the terminal device can also be a wearable device. Wearable devices, also known as wearable smart devices, are a general term for devices that utilize wearable technology to intelligently design and develop everyday wearables, such as glasses, gloves, watches, clothing, and shoes. Wearable devices are portable devices that are worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not merely hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include those that are feature-rich, large in size, and can achieve complete or partial functions without relying on a smartphone, such as smartwatches or smart glasses, as well as those that focus on a specific type of application function and require the use of other devices such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0043] Network devices can be devices used to communicate with mobile devices. Network devices can be access points (APs) in WLANs, base stations (BTSs) in GSM or CDMA, base stations (NodeBs, NBs) in WCDMA, evolved Node Bs (eNBs or eNodeBs) in LTE, relay stations or access points, or in-vehicle devices, wearable devices, and network devices (gNBs) in NR networks, or network devices in future PLMN networks, etc.

[0044] Network equipment can be mobile; for example, it can be a mobile device. Optionally, network equipment can be a satellite or a balloon station. For example, the satellite can be a low Earth orbit (LEO) satellite, a medium Earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, or a highly elliptical orbit (HEO) satellite. Optionally, network equipment can also be a base station located on land, water, or other similar locations.

[0045] In this embodiment, the network device can provide services to a cell. The terminal device communicates with the network device through the transmission resources (e.g., frequency domain resources, or spectrum resources) used by the cell. The cell can be the cell corresponding to the network device (e.g., a base station). The cell can belong to a macro base station or to a base station corresponding to a small cell. The small cell can include: metro cell, micro cell, pico cell, femto cell, etc. These small cells have the characteristics of small coverage area and low transmission power, and are suitable for providing high-speed data transmission services.

[0046] The following is combined Figure 1A-Figure 1B The architecture of the communication system in this application will be described.

[0047] Figure 1A This is a schematic diagram of the architecture of a communication system provided in an embodiment of this application. Please refer to [link / reference]. Figure 1A This includes terminal device 1101 and satellite 1102, which can communicate wirelessly. The network formed between terminal device 1101 and satellite 1102 can also be called an NTN. Figure 1AIn the architecture of the communication system shown, satellite 1102 can function as a base station, and terminal device 1101 and satellite 1102 can communicate directly. In this system architecture, satellite 1102 can be referred to as a network device. Optionally, the communication system may include multiple network devices 1102, and the coverage area of ​​each network device 1102 may include other numbers of terminal devices; this embodiment does not limit this.

[0048] Figure 1B This is a schematic diagram of the architecture of another communication system provided in an embodiment of this application. Please refer to... Figure 1B The network includes terminal device 1201, satellite 1202, and base station 1203. Terminal device 1201 and satellite 1202 can communicate wirelessly, and satellite 1202 can communicate with base station 1203. The network formed by terminal device 1201, satellite 1202, and base station 1203 can also be called an NTN. Figure 1B In the architecture of the communication system shown, satellite 1202 may not function as a base station, and communication between terminal device 1201 and base station 1203 requires relay through satellite 1202. In this system architecture, base station 1203 can be referred to as a network device. Optionally, the communication system may include multiple network devices 1203, and the coverage area of ​​each network device 1203 may include other numbers of terminal devices; this embodiment does not limit this.

[0049] It should be noted that, Figure 1A-Figure 1B This application is merely an example illustrating the system to which this application applies. Of course, the methods shown in the embodiments of this application can also be applied to other systems, such as 5G communication systems, LTE communication systems, etc. This application does not specifically limit these systems.

[0050] Optionally, Figure 1A-Figure 1B The wireless communication system shown may also include other network entities such as a Mobility Management Entity (MME) and an Access and Mobility Management Function (AMF), but this application does not limit this.

[0051] It should be understood that the terms "system" and "network" are often used interchangeably in this article.

[0052] In the description of the embodiments of this application, the term "correspondence" may indicate that there is a direct or indirect correspondence between two things, or that there is an association between two things, or that there is a relationship of instruction and being instructed, configuration and being configured, etc.

[0053] To clearly illustrate the ideas behind the embodiments of this application, the relevant technical content of the embodiments of this application will first be briefly described. The embodiments of this application include at least some of the following contents.

[0054] I. The random access process is mainly triggered by the following events:

[0055] (1) Initial access: The terminal device moves from the Radio Resource Control (RRC) idle state (RRC_IDLE) to the RRC connected state (RRC_CONNECTED).

[0056] (2) RRC Connection Re-establishment.

[0057] (3) Handover, which means that the terminal device needs to establish uplink synchronization with the new cell.

[0058] (4) Under RRC_CONNECTED, downlink (DL) data arrives, while uplink (UL) is out of sync.

[0059] (5) When RRC_CONNECTED is reached, UL data arrives, and UL is out of sync at this time.

[0060] (6) Under RRC_CONNECTED, UL data arrives, but there are no available Physical Uplink Control Channel (PUCCH) resources for scheduling request (SR) transmission. In this case, terminal devices already in uplink synchronization state can use the Random Access Channel (RACH) to replace the role of SR.

[0061] (7) Synchronization reconfiguration request from RRC.

[0062] (8) The terminal transitions from the RRC inactive state (RRC_INACTIVE) to the active state (RRC_ACTIVE).

[0063] (9) Establish time calibration during the addition of a secondary serving cell (SCell).

[0064] (10) The terminal device requests other system information (OSI).

[0065] (11) Beam failure recovery of terminal equipment.

[0066] II. Random Access Procedure:

[0067] In NR Release (Rel)-15, the following two random access methods are mainly supported: contention-based random access and non-contention-based random access.

[0068] To facilitate understanding, the following will combine... Figure 2 and Figure 3 A brief introduction to the random access process.

[0069] Figure 2 This is a flowchart illustrating the four-step random access process based on competition.

[0070] like Figure 2 As shown, the random access procedure may include the following four steps:

[0071] Step 1, Msg 1.

[0072] The terminal device sends Msg 1 to the base station to inform the network device that it has initiated a random access request. Msg 1 carries a Random Access Preamble (RAP), also known as a random access preamble sequence, preamble, or preamble code. Simultaneously, Msg 1 can also be used by the network device to estimate the transmission delay between itself and the terminal device and to calibrate the uplink time accordingly.

[0073] Specifically, the terminal device selects a preamble index and a PRACH resource for sending the preamble; then, the terminal device transmits the preamble on the PRACH. The network device notifies all terminal devices via a System Information Block (SIB) that the preamble is permitted to be transmitted on which time-frequency resources, for example, SIB1.

[0074] Step 2, Msg 2.

[0075] After receiving Msg 1 from the terminal device, the network device sends Msg 2, which is the Random Access Response (RAR) message, to the terminal device. This Msg 2 may carry, for example, Time Advance (TA), uplink authorization instructions such as uplink resource configuration, and Temporary Cell-Radio Network Temporary Identity (TC-RNTI).

[0076] The terminal device listens to the Physical Downlink Control Channel (PDCCH) within the Random Access Response (RAR) window to receive RAR messages from the network device. These RAR messages can be descrambled using the corresponding Random Access Radio Network Temporary Identifier (RA-RNTI).

[0077] If the terminal device does not receive a reply RAR message from the network device within the RAR time window, the random access process is considered to have failed.

[0078] If a terminal device successfully receives a RAR message, and the preamble index carried in the RAR message is the same as the index of the preamble sent by the terminal device via Msg 1, then the RAR is considered to have been successfully received, and the terminal device can stop listening within the RAR time window.

[0079] Msg 2 may include RAR messages for multiple terminal devices. Each terminal device's RAR message may include the random access preamble identifier (RAP Identify, RAPID) used by the terminal device, information on resources used to transmit Msg 3, TA adjustment information, TC-RNTI, etc.

[0080] Step 3, Msg 3.

[0081] After receiving a RAR message, the terminal device determines whether it is its own RAR message. For example, the terminal device can use a preamble identifier for verification. After confirming that it is its own RAR message, the terminal device generates Msg3 at the RRC layer and sends Msg3 to the network device. Msg3 needs to carry the terminal device's identification information, etc.

[0082] Specifically, for different random access trigger events, Msg 3 in step 3 of the 4-step random access process can include different content for scheduled transmission.

[0083] For example, in the initial access scenario, Msg 3 may include an RRC connection request generated by the RRC layer, which carries at least the Non-Access Stratum (NAS) identification information of the terminal device, and may also carry, for example, the Serving-Temporary Mobile Subscriber Identity (S-TMSI) or a random number of the terminal device.

[0084] For example, in a connection reconstruction scenario, Msg 3 may include an RRC Connection Re-establishment Request generated by the RRC layer without carrying any NAS message. In addition, it may carry information such as Cell Radio Network Temporary Identifier (C-RNTI) and Protocol Control Information (PCI).

[0085] For example, in a handover scenario, Msg 3 may include an RRC handover confirmation message generated by the RRC layer and the terminal device's C-RNTI, and may also carry, for example, a buffer status report (BSR); for other triggering events such as the arrival of uplink / downlink data, Msg 3 must at least include the terminal device's C-RNTI.

[0086] Step 4, Msg 4.

[0087] The network device sends Msg 4 to the terminal device, and the terminal device correctly receives Msg 4 to complete the contention resolution. For example, during the establishment of an RRC connection, Msg 4 can carry an RRC connection establishment message.

[0088] Since the terminal device in step 3 carries its unique identifier in Msg 3, such as C-RNTI or identification information from the core network (such as S-TMSI or a random number), the network device will carry the unique identifier of the terminal device in Msg 4 to designate the winning terminal device in the contention resolution mechanism. Other terminal devices that do not win the contention resolution will re-initiate random access.

[0089] Figure 3 This is a flowchart of a non-contested four-step random access process.

[0090] like Figure 3 As shown, the random access procedure may include Figure 2 The first two steps (i.e.) Figure 2 Steps 1 and 2 in the process. Where:

[0091] Step 0: The network device sends a random access preamble assignment (RA Preambleassignment) message to the terminal device.

[0092] Step 1, Msg 1.

[0093] The terminal device sends Msg 1 to the base station to inform the network device that the terminal device has initiated a random access request. The Msg 1 carries a random access preamble.

[0094] Step 2, Msg 2.

[0095] After receiving Msg 1 from the terminal device, the network device sends Msg 2, or RAR message, to the terminal device. Msg 2 may carry information such as TA information, uplink authorization instructions (e.g., uplink resource configuration), and TC-RNTI information.

[0096] If the terminal device does not receive a reply RAR message from the network device within the RAR time window, the random access procedure is considered to have failed. If the terminal device successfully receives a RAR message, and the preamble index carried in the RAR message is the same as the index of the preamble sent by the terminal device via Msg 1, then the RAR is considered to have been successfully received, and the terminal device can stop listening for RAR messages.

[0097] For details regarding Msg 1 and Msg 2 in a non-contention-based random access procedure, please refer to the aforementioned description of Msg 1 and Msg 2 in a contention-based random access procedure. For the sake of brevity, these details will not be repeated here.

[0098] The NR Rel-16 version introduced a two-step random access procedure, which can reduce latency and signaling overhead. Figure 4AThis is a flowchart of a two-step random access process based on competition, such as... Figure 4A As shown, the random access procedure may include:

[0099] Step 1, Msg A.

[0100] MsgA includes: the preamble transmitted on PRACH and the payload information transmitted on the Physical Uplink Shared Channel (PUSCH).

[0101] Step 2, MsgB.

[0102] After the MsgA transmission, the terminal device listens for the network's response within the configured window. If it receives an indication from the network that the contention resolution was successful, the terminal device terminates the random access process.

[0103] Figure 4B This is a flowchart of a non-contention-based two-step random access process, such as... Figure 4B As shown, the random access procedure may include:

[0104] Step 0: The network device sends a random access preamble assignment (RA Preambleassignment) message to the terminal device.

[0105] Step 1, Msg A.

[0106] MsgA includes: the Preamble transmitted on PRACH and the payload information transmitted on PUSCH.

[0107] Step 2, MsgB.

[0108] After MsgA is transmitted, the terminal device receives MsgB, which is the random access response.

[0109] As described above, in an NR system, the terminal device selects the random access type based on RSRP measurements. When the RSRP measured by the terminal device is higher than the RSRP threshold configured by the network, the terminal device uses a two-step random access method; otherwise, the terminal device uses a four-step random access method. Figure 5 As shown, the "near-far effect" is significant in NR systems. Figure 6As shown, the "near-far effect" is not significant in NTN. Therefore, if the method used in NR systems to determine the random access type is still adopted, it is difficult to set an appropriate RSRP threshold for random access type selection. Furthermore, due to significant differences in capabilities between terminal devices in NTN systems, selecting the random access type based on RSRP measurements is likely to lead to inappropriate random access types being selected. For example, for high-performance terminal devices, a low measured RSRP might result in a four-step random access selection, increasing random access latency. For low-performance terminal devices, a high measured RSRP might result in a two-step random access selection, which, after several unsuccessful attempts, would force a fallback to four-step random access or even complete random access failure, severely impacting user experience. In short, selecting the random access type based on RSRP measurements makes it difficult to determine the correct type, thus reducing the reliability of random access.

[0110] To address the aforementioned technical issues, this application can determine the random access type by sending configuration information from the network device to the terminal device, thereby enabling the random access process.

[0111] The technical solution of this application will be described below through specific embodiments:

[0112] Figure 7 An interactive flowchart of a wireless communication method provided in one embodiment of this application is shown below. Figure 7 As shown, the method includes the following steps:

[0113] Step S710: The network device sends first configuration information to the terminal device. The first configuration information is used to determine the first random access type of the terminal device.

[0114] Step S720: The terminal device performs random access according to the first random access type.

[0115] The following explanation is provided for step S710:

[0116] Optionally, the first configuration information may include any of the following, but is not limited to:

[0117] (1) First random access type.

[0118] (2) The first logical channel list corresponding to the two-step random access method based on competition.

[0119] (3) The second logical channel list corresponding to the four-step random access method based on competition.

[0120] (4) The first logical channel list corresponding to the two-step random access method based on contention and the second logical channel list corresponding to the four-step random access method based on contention.

[0121] (5) The correspondence between at least one logical channel and at least one random access type.

[0122] It should be understood that the first logical channel list corresponding to the contention-based two-step random access method indicates that there is a correspondence between logical channels and random access methods. For example, logical channel 1 corresponds to the contention-based two-step random access method, and channel 2 corresponds to the contention-based four-step random access method. The random access methods corresponding to the logical channels in the first logical channel list are all contention-based two-step random access methods.

[0123] It should be understood that the second logical channel list corresponding to the contention-based four-step random access method indicates a correspondence between logical channels and random access methods. Furthermore, the random access methods corresponding to the logical channels in the second logical channel list are all contention-based four-step random access methods.

[0124] It should be understood that the correspondence between at least one logical channel and at least one random access type can be that all at least one logical channel corresponds to a contention-based two-step random access method, or that all at least one logical channel corresponds to a contention-based four-step random access method, or that a portion of the at least one logical channel corresponds to a contention-based two-step random access method, while another portion corresponds to a contention-based four-step random access method. This application does not limit the correspondence here.

[0125] Optionally, if the first configuration information carries a first random access type, then the first random access type can be determined based on the capabilities of the terminal device.

[0126] Optionally, the length of the first random access type carried in the first configuration information can be 1 bit or other lengths, and this application does not limit this.

[0127] It should be understood that the capabilities of a terminal device can be measured by various hardware and software parameters of the terminal device, and this application does not limit the hardware and software parameters here.

[0128] Optionally, if the terminal device's capabilities meet preset conditions, such as the aforementioned hardware and software parameters being greater than or less than corresponding preset thresholds, then the first random access type can be a contention-based two-step random access type. Conversely, the first random access type can be a contention-based four-step random access type. Alternatively, the terminal device's capability level can be determined based on its hardware and software parameters, and this capability level corresponds to the random access type. Therefore, the network device can also determine the first random access type based on this correspondence. In summary, this application does not limit how the first random access type is determined based on the terminal device's capabilities.

[0129] Optionally, if the first configuration information carries a first logical channel list, and the logical channel containing the uplink data-triggered Buffer Status Report (BSR) of the terminal device is in the first logical channel list, then the first random access type is a contention-based two-step random access type. Otherwise, the first random access type is a contention-based four-step random access type, that is, if the logical channel containing the uplink data-triggered BSR of the terminal device is not in the first logical channel list, then the first random access type is a contention-based four-step random access type.

[0130] Optionally, if the first configuration information carries a second logical channel list, and the logical channel on which the BSR triggered by the uplink data of the terminal device is located is in the second logical channel list, then the first random access type is a contention-based four-step random access type. Otherwise, the first random access type is a contention-based two-step random access type, that is, if the logical channel on which the BSR triggered by the uplink data of the terminal device is located is not in the second logical channel list, then the first random access type is a contention-based two-step random access type.

[0131] Optionally, if the first configuration information includes the aforementioned first logical channel list and the aforementioned second logical channel list, and the logical channel on which the BSR triggered by the uplink data of the terminal device is located is in the first logical channel list, then the first random access type is a contention-based two-step random access type. Alternatively, if the first configuration information includes the aforementioned first logical channel list and the aforementioned second logical channel list, and the logical channel on which the BSR triggered by the uplink data of the terminal device is located is in the second logical channel list, then the first random access type is a contention-based four-step random access type.

[0132] Optionally, if the first configuration information includes a correspondence between at least one logical channel and at least one random access type, and the at least one logical channel includes the logical channel where the BSR triggered by the uplink data of the terminal device is located, then the first random access type is determined based on the logical channel where the BSR triggered by the uplink data of the terminal device is located and the correspondence. For example, the correspondence between at least one logical channel and at least one random access type is shown in Table 1.

[0133] Table 1

[0134] Logical Channel Random access type Type I logical channel Competition-based two-step random access type Type II logical channel Contention-based four-step random access type

[0135] Assuming that the logical channel on which the BSR triggered by the uplink data of the terminal device is logical channel 1, then the first random access type is a contention-based two-step random access type.

[0136] Optionally, the first configuration information may not include the first logical channel list, but may include the identifier of the first logical channel list. Similarly, the first configuration information may not include the second logical channel list, but may include the identifier of the second logical channel list.

[0137] Optionally, the identifier length of the first logical channel list can be 1 bit or other lengths, and this application does not impose any restrictions on this.

[0138] Optionally, the identifier length of the second logical channel list can be 1 bit or other lengths, and this application does not impose any restrictions on this.

[0139] Optionally, the first configuration information may also include any combination of the following: (1) a first random access type; (2) a first logical channel list corresponding to a contention-based two-step random access method; (3) a second logical channel list corresponding to a contention-based four-step random access method; (4) a first logical channel list corresponding to a contention-based two-step random access method and a second logical channel list corresponding to a contention-based four-step random access method; and (5) a correspondence between at least one logical channel and at least one random access type.

[0140] If the first configuration information includes any combination of the above items, the terminal device and the network device can negotiate which method to use to determine the first random access type. This application does not restrict how the terminal device and the network device negotiate.

[0141] Optionally, the first random access type is a contention-based two-step random access type or a contention-based four-step random access type.

[0142] Optionally, the first configuration information is carried in RRC signaling, for example, in the Signaling Radio Bearers (SRB). Of course, the first configuration information can also be carried in other signaling, such as the Media Access Control Control Element (MAC CE). This application does not limit this.

[0143] Optionally, the aforementioned RRC signaling may be RRC reconfiguration signaling.

[0144] Optionally, the network device can also send contention-based two-step random access resource configuration and contention-based four-step random access resource configuration to the terminal device.

[0145] It should be understood that contention-based two-step random access resource configuration is contention-based two-step random access MsgA resource configuration, including MsgA RACH resource configuration and MsgA PUSCH resource configuration.

[0146] It should be understood that contention-based four-step random access resource allocation is based on contention-based four-step random access RACH resource allocation.

[0147] The following explanation is provided for step S720:

[0148] Optionally, the case where the first configuration information carries the first random access type can be applied to any random access procedure. Therefore, before executing step S720, the terminal device first determines whether it has been configured with a non-contention-based random access resource. If it has been configured with a non-contention-based random access resource, the terminal device can use a non-contention-based random access method, i.e., step S720 does not need to be executed. If it has not been configured with a non-contention-based random access resource, the terminal device can use a contention-based random access method, i.e., step S720 needs to be executed.

[0149] Optionally, the first configuration information carries the aforementioned first logical channel list, or carries a second logical channel list, or carries both the first and second logical channel lists, or a correspondence between at least one logical channel and at least one random access type. That is, these are all related to logical channels, and therefore these situations are related to uplink resource requests. Since uplink resource requests do not involve non-contention-based random access procedures, the terminal device does not need to determine whether it has been configured with non-contention-based random access resources.

[0150] It should be understood that, regardless of the type of information carried in the first configuration information, if the random access procedure is for uplink resource request (i.e., under RRC_CONNECTED, UL data arrives, but there are no available PUCCH resources for scheduling request (SR) transmission), the terminal device can use RACH to replace the role of SR. In other words, if the terminal device fails to request uplink resources through BSR and SR, the terminal device will perform random access according to the first random access type.

[0151] It should be understood that when a terminal device fails to request uplink resources through BSR and SR, it is also described as an SR request failure. An SR request failure may be due to the absence of SR resources or the SR reaching the maximum number of retransmissions, but is not limited to these.

[0152] Optionally, the terminal device may perform random access according to the first random access type, which can be achieved in any of the following ways, but is not limited to:

[0153] (1) The terminal device uses the random access method corresponding to the first random access type to perform random access.

[0154] (2) The terminal device performs random access based on the measured RSRP and the first random access type.

[0155] Explanation regarding (1):

[0156] If the first random access type is a contention-based two-step random access type, the terminal device uses the contention-based two-step random access type for random access. If the first random access type is a contention-based four-step random access type, the terminal device uses the contention-based four-step random access type for random access.

[0157] Explanation regarding (2):

[0158] Optionally, if the first random access type is a contention-based two-step random access type, and the measured RSRP is greater than or equal to the RSRP threshold, then a contention-based two-step random access method is used for random access. If the first random access type is a contention-based four-step random access type, or if the measured RSRP is less than the RSRP threshold, then a contention-based four-step random access method is used for random access. Or,

[0159] Optionally, if the first random access type is a contention-based two-step random access type, and the measured RSRP is greater than the RSRP threshold, then a contention-based two-step random access method is used for random access. If the first random access type is a contention-based four-step random access type, or if the measured RSRP is less than or equal to the RSRP threshold, then a contention-based four-step random access method is used for random access. Or,

[0160] Optionally, if the first random access type is a contention-based four-step random access type, and the measured RSRP is less than or equal to the RSRP threshold, then a contention-based four-step random access method is used for random access. If the first random access type is a contention-based two-step random access type, or if the measured RSRP is greater than the RSRP threshold, then a contention-based two-step random access method is used for random access. Or,

[0161] Optionally, if the first random access type is a contention-based four-step random access type and the measured RSRP is less than the RSRP threshold, then a contention-based four-step random access method is used for random access. If the first random access type is a contention-based two-step random access type, or if the measured RSRP is greater than or equal to the RSRP threshold, then a contention-based two-step random access method is used for random access.

[0162] Optionally, the aforementioned RSRP threshold may be predefined by the network device or the terminal device, or may be negotiated between them; this application does not impose any restrictions on this.

[0163] Optionally, if the terminal device determines to use a contention-based two-step random access method for random access, the terminal device selects a MsgA RACH resource and a MsgA PUSCH resource from the MsgA resource pool configured in the network for two-step random access, and sends the MsgA on the selected resources.

[0164] Optionally, if the terminal device determines to use a contention-based four-step random access method for random access, the terminal device selects a RACH resource from the RACH resource pool configured for four-step random access in the network and sends Msg1 on the selected resource.

[0165] In summary, in this application, the terminal device can determine the first random access type based on the first configuration information. Since the network device either directly carries the first random access type in the first configuration information, or the terminal device determines the first random access type based on any one of the first logical channel list, the second logical channel list, and the above correspondence, and the logical channel where the BSR triggered by the uplink data of the terminal device is located, this method can be independent of the RSRP measured by the terminal device or not only independent of the RSRP measured by the terminal device. That is to say, even if the "near-far effect" is not obvious in the NTN system, it will not lead to the inability to determine the first random access type, thereby improving the reliability of random access and effectively utilizing two-step random access to reduce access latency.

[0166] The above text combined Figure 7 The method embodiments of this application are described in detail below, in conjunction with... Figures 8 to 12 The present application describes the device embodiments in detail. It should be understood that the device embodiments correspond to the method embodiments, and similar descriptions can be referred to the method embodiments.

[0167] Figure 8 A schematic block diagram of a terminal device 800 according to an embodiment of this application is shown. Figure 8 As shown, the terminal device 800 includes a communication unit 810 and a processing unit 820. The communication unit 810 is used to acquire first configuration information of the terminal device, which is used to determine a first random access type of the terminal device. The processing unit 820 is used to perform random access according to the first random access type.

[0168] Optionally, the first configuration information includes: a first random access type.

[0169] Optionally, the communication unit 810 is also configured to report the capabilities of the terminal device to the network device. The capabilities of the terminal device are used to determine the first random access type.

[0170] Optionally, the first configuration information includes a first logical channel list corresponding to a contention-based two-step random access method. Accordingly, if the logical channel on which the BSR triggered by the uplink data of the terminal device resides is in the first logical channel list, then the first random access type is a contention-based two-step random access type. Otherwise, the first random access type is a contention-based four-step random access type.

[0171] Optionally, the first configuration information includes a second logical channel list corresponding to the contention-based four-step random access method. Accordingly, if the logical channel on which the BSR triggered by the uplink data of the terminal device resides is in the second logical channel list, then the first random access type is a contention-based four-step random access type. Otherwise, the first random access type is a contention-based two-step random access type.

[0172] Optionally, the first configuration information includes: a first logical channel list corresponding to a contention-based two-step random access method and a second logical channel list corresponding to a contention-based four-step random access method. Accordingly, if the logical channel containing the BSR triggered by the uplink data of the terminal device is in the first logical channel list, then the first random access type is a contention-based two-step random access type. If the logical channel containing the BSR triggered by the uplink data of the terminal device is in the second logical channel list, then the first random access type is a contention-based four-step random access type.

[0173] Optionally, the first configuration information includes: a correspondence between at least one logical channel and at least one random access type. Accordingly, the first random access type is determined based on the logical channel and correspondence of the BSR triggered by the uplink data of the terminal device.

[0174] Optionally, the processing unit 820 is specifically configured to: perform random access using the random access method corresponding to the first random access type; or, perform random access based on the measured RSRP and the first random access type.

[0175] Optionally, the processing unit 820 is specifically configured to: if the first random access type is a contention-based two-step random access type, and the measured RSRP is greater than or equal to the RSRP threshold, then use a contention-based two-step random access method for random access. Otherwise, use a contention-based four-step random access method for random access.

[0176] Optionally, the processing unit 820 is specifically configured to: if the first random access type is a contention-based four-step random access type, and the measured RSRP is less than or equal to the RSRP threshold, then use a contention-based four-step random access method for random access. Otherwise, use a contention-based two-step random access method for random access.

[0177] Optionally, the processing unit 820 is specifically used to: perform random access according to the first random access type when the terminal device fails to request uplink resources through BSR and SR.

[0178] Optionally, the communication unit 810 is also used to obtain contention-based two-step random access resource configuration and contention-based four-step random access resource configuration.

[0179] Optionally, the first configuration information is carried in the RRC signaling.

[0180] Optionally, the first random access type is a contention-based two-step random access type or a contention-based four-step random access type.

[0181] Optionally, in some embodiments, the communication unit may be a communication interface or transceiver, or an input / output interface of a communication chip or system-on-a-chip. The processing unit may be one or more processors.

[0182] It should be understood that the terminal device 800 according to the embodiments of this application may correspond to the terminal device in the method embodiments of this application, and the above and other operations and / or functions of each unit in the terminal device 800 are respectively for implementing Figure 7 The corresponding processes for the terminal devices in the method shown will not be elaborated here for the sake of brevity.

[0183] Figure 9 A schematic block diagram of a network device 900 according to an embodiment of this application is shown. Figure 9 As shown, the network device 900 includes: a communication unit 910, used to send first configuration information of the terminal device to the terminal device, the first configuration information being used to determine the first random access type of the terminal device.

[0184] Optionally, the first configuration information includes: a first random access type.

[0185] Optionally, the communication unit 910 is also used to acquire the capabilities of the terminal device. The capabilities of the terminal device are used to determine the first random access type.

[0186] Optionally, the first configuration information includes a first logical channel list corresponding to a contention-based two-step random access method. Accordingly, if the logical channel on which the BSR triggered by the uplink data of the terminal device resides is in the first logical channel list, then the first random access type is a contention-based two-step random access type. Otherwise, the first random access type is a contention-based four-step random access type.

[0187] Optionally, the first configuration information includes a second logical channel list corresponding to the contention-based four-step random access method. Accordingly, if the logical channel on which the BSR triggered by the uplink data of the terminal device resides is in the second logical channel list, then the first random access type is a contention-based four-step random access type. Otherwise, the first random access type is a contention-based two-step random access type.

[0188] Optionally, the first configuration information includes: a first logical channel list corresponding to a contention-based two-step random access method and a second logical channel list corresponding to a contention-based four-step random access method. Accordingly, if the logical channel containing the BSR triggered by the uplink data of the terminal device is in the first logical channel list, then the first random access type is a contention-based two-step random access type. If the logical channel containing the BSR triggered by the uplink data of the terminal device is in the second logical channel list, then the first random access type is a contention-based four-step random access type.

[0189] Optionally, the first configuration information includes: a correspondence between at least one logical channel and at least one random access type. Accordingly, the first random access type is determined based on the logical channel and correspondence of the BSR triggered by the uplink data of the terminal device.

[0190] Optionally, the communication unit 910 is also used to send contention-based two-step random access resource configuration and contention-based four-step random access resource configuration to the terminal device.

[0191] Optionally, the first configuration information is carried in the RRC signaling.

[0192] Optionally, the first random access type is a contention-based two-step random access type or a contention-based four-step random access type.

[0193] Optionally, in some embodiments, the communication unit may be a communication interface or transceiver, or an input / output interface of a communication chip or system-on-a-chip.

[0194] It should be understood that the network device 900 according to the embodiments of this application may correspond to the network device in the method embodiments of this application, and the above and other operations and / or functions of each unit in the network device 900 are respectively for implementing Figure 7 The corresponding processes for network devices in the method shown will not be elaborated here for the sake of brevity.

[0195] Figure 10 This is a schematic structural diagram of a communication device 1000 provided in an embodiment of this application. Figure 10 The communication device 1000 shown includes a processor 1010, which can call and run computer programs from memory to implement the methods in the embodiments of this application.

[0196] Optionally, such as Figure 10 As shown, the communication device 1000 may further include a memory 1020. The processor 1010 can retrieve and run computer programs from the memory 1020 to implement the methods described in this embodiment.

[0197] The memory 1020 can be a separate device independent of the processor 1010, or it can be integrated into the processor 1010.

[0198] Optionally, such as Figure 10 As shown, the communication device 1000 may also include a transceiver 1030, and the processor 1010 may control the transceiver 1030 to communicate with other devices. Specifically, it may send information or data to other devices or receive information or data sent by other devices.

[0199] The transceiver 1030 may include a transmitter and a receiver. The transceiver 1030 may further include an antenna, and the number of antennas may be one or more.

[0200] Optionally, the communication device 1000 may specifically be a network device in the embodiments of this application, and the communication device 1000 may implement the corresponding processes implemented by the network device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0201] Optionally, the communication device 1000 may specifically be a terminal device in the embodiments of this application, and the communication device 1000 may implement the corresponding processes implemented by the terminal device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0202] Figure 11 This is a schematic structural diagram of the device according to an embodiment of this application. Figure 11 The illustrated device 1100 includes a processor 1110, which can call and run computer programs from memory to implement the methods in the embodiments of this application.

[0203] Optionally, such as Figure 11 As shown, the device 1100 may further include a memory 1120. The processor 1110 can retrieve and run computer programs from the memory 1120 to implement the methods described in the embodiments of this application.

[0204] The memory 1120 can be a separate device independent of the processor 1110, or it can be integrated into the processor 1110.

[0205] Optionally, the device 1100 may further include an input interface 1130. The processor 1110 can control the input interface 1130 to communicate with other devices or chips; specifically, it can acquire information or data sent by other devices or chips.

[0206] Optionally, the device 1100 may also include an output interface 1140. The processor 1110 can control the output interface 1140 to communicate with other devices or chips, specifically, to output information or data to other devices or chips.

[0207] Optionally, the device can be applied to the network device in the embodiments of this application, and the device can implement the corresponding processes implemented by the network device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0208] Optionally, the device can be applied to the terminal device in the embodiments of this application, and the device can implement the corresponding processes implemented by the terminal device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0209] Optionally, the device mentioned in the embodiments of this application can also be a chip. For example, it can be a system-on-a-chip, a system-on-a-chip, a chip system, or a system-on-a-chip, etc.

[0210] Figure 12 This is a schematic block diagram of a communication system 1200 provided in an embodiment of this application. Figure 12 As shown, the communication system 1200 includes a terminal device 1210 and a network device 1220.

[0211] The terminal device 1210 can be used to implement the corresponding functions implemented by the terminal device in the above method, and the network device 1220 can be used to implement the corresponding functions implemented by the network device or base station in the above method. For the sake of brevity, it will not be described in detail here.

[0212] It should be understood that the processor in the embodiments of this application may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the above method embodiments can be completed by integrated logic circuits in the processor's hardware or by instructions in software form. The processor described above can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules can be located in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in memory, and the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method.

[0213] It is understood that the memory in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDR SDRAM), Enhanced Synchronous DRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DR RAM). It should be noted that the memory used in the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0214] It should be understood that the above-described memory is exemplary and not a limiting description. For example, the memory in the embodiments of this application may also be static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct memory bus RAM (DR RAM), etc. That is to say, the memory in the embodiments of this application is intended to include, but is not limited to, these and any other suitable types of memory.

[0215] This application also provides a computer-readable storage medium for storing computer programs.

[0216] Optionally, the computer-readable storage medium can be applied to the network device or base station in the embodiments of this application, and the computer program causes the computer to execute the corresponding processes implemented by the network device or base station in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0217] Optionally, the computer-readable storage medium can be applied to the mobile terminal / terminal device in the embodiments of this application, and the computer program causes the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0218] This application also provides a computer program product, including computer program instructions.

[0219] Optionally, the computer program product can be applied to the network device or base station in the embodiments of this application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the network device or base station in the various methods of the embodiments of this application. For the sake of brevity, they will not be described in detail here.

[0220] Optionally, the computer program product can be applied to the mobile terminal / terminal device in the embodiments of this application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of this application. For the sake of brevity, they will not be described in detail here.

[0221] This application also provides a computer program.

[0222] Optionally, the computer program can be applied to the network device or base station in the embodiments of this application. When the computer program is run on a computer, it causes the computer to execute the corresponding processes implemented by the network device or base station in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0223] Optionally, the computer program can be applied to the mobile terminal / terminal device in the embodiments of this application. When the computer program is run on a computer, it causes the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0224] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0225] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0226] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0227] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0228] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0229] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0230] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A wireless communication method, characterized in that, include: A terminal device in a non-terrestrial communication network (NTN) obtains first configuration information of the terminal device sent by a network device. The first configuration information is used to determine the first random access type of the terminal device. If the first random access type is a contention-based two-step random access type, and the measured reference signal received power (RSRP) is greater than or equal to the RSRP threshold, then the terminal device uses a contention-based two-step random access method for random access. Otherwise, the terminal device uses a contention-based four-step random access method for random access; or, If the first random access type is a contention-based four-step random access type, and the measured RSRP is less than or equal to the RSRP threshold, then the terminal device uses a contention-based four-step random access method for random access. Otherwise, the terminal device uses a contention-based two-step random access method for random access; The first configuration information includes the first random access type and any one of the following: The first logical channel list corresponding to the two-step random access method based on competition; The second logical channel list corresponding to the competition-based four-step random access method; The first logical channel list corresponding to the contention-based two-step random access method and the second logical channel list corresponding to the contention-based four-step random access method; A correspondence between at least one logical channel and at least one random access type; Wherein, if the first configuration information includes the first random access type, before the terminal device obtains the first configuration information of the terminal device, the method further includes: The terminal device reports its capabilities to the network device; wherein, the capabilities of the terminal device are used by the network device to determine the first random access type and carry the first random access type in the first configuration information sent. The capabilities of the terminal device are measured by its hardware and software parameters. When the hardware and software parameters are greater than or less than the corresponding preset thresholds, the first random access type is a contention-based two-step random access type; otherwise, the first random access type is a contention-based four-step random access type. The length of the first random access type carried in the first configuration information is 1 bit.

2. The method according to claim 1, characterized in that, When the first configuration information includes: a first logical channel list corresponding to a contention-based two-step random access method; If the logical channel where the buffer status report (BSR) triggered by the uplink data of the terminal device is located is in the first logical channel list, then the first random access type is a contention-based two-step random access type. Otherwise, the first random access type is a contention-based four-step random access type.

3. The method according to claim 1, characterized in that, When the first configuration information includes: a list of second logical channels corresponding to a contention-based four-step random access method; If the logical channel on which the BSR triggered by the uplink data of the terminal device is located is in the second logical channel list, then the first random access type is a contention-based four-step random access type. Otherwise, the first random access type is a contention-based two-step random access type.

4. The method according to claim 1, characterized in that, When the first configuration information includes: a first logical channel list corresponding to a contention-based two-step random access method and a second logical channel list corresponding to a contention-based four-step random access method; If the logical channel on which the BSR triggered by the uplink data of the terminal device is located is in the first logical channel list, then the first random access type is a contention-based two-step random access type. If the logical channel on which the BSR triggered by the uplink data of the terminal device is located is in the second logical channel list, then the first random access type is a contention-based four-step random access type.

5. The method according to claim 1, characterized in that, When the first configuration information includes: a correspondence between at least one logical channel and at least one random access type; The first random access type is determined based on the logical channel of the BSR triggered by the uplink data of the terminal device and the corresponding relationship.

6. The method according to any one of claims 1-5, characterized in that, Also includes: The terminal device obtains a contention-based two-step random access resource configuration and a contention-based four-step random access resource configuration.

7. The method according to any one of claims 1-5, characterized in that, The first configuration information is carried in the Radio Resource Control (RRC) signaling.

8. The method according to any one of claims 1-5, characterized in that, The first random access type is either a contention-based two-step random access type or a contention-based four-step random access type.

9. A wireless communication method, characterized in that, include: In an NTN network device, the network device sends first configuration information of the terminal device to the terminal device. This first configuration information determines the first random access type of the terminal device. If the first random access type is a contention-based two-step random access type and the measured RSRP is greater than or equal to the RSRP threshold, then the terminal device uses a contention-based two-step random access method for random access; otherwise, the terminal device uses a contention-based four-step random access method for random access. Alternatively, if the first random access type is a contention-based four-step random access type and the measured RSRP is less than or equal to the RSRP threshold, then the terminal device uses a contention-based four-step random access method for random access; otherwise, the terminal device uses a contention-based two-step random access method for random access. The first configuration information includes the first random access type and any one of the following: The first logical channel list corresponding to the two-step random access method based on competition; The second logical channel list corresponding to the competition-based four-step random access method; The first logical channel list corresponding to the contention-based two-step random access method and the second logical channel list corresponding to the contention-based four-step random access method; A correspondence between at least one logical channel and at least one random access type; Wherein, if the first configuration information includes the first random access type, before the network device sends the first configuration information of the terminal device to the terminal device, the method further includes: The network device acquires the capabilities of the terminal device, wherein the capabilities of the terminal device are used by the network device to determine the first random access type and carry the first random access type in the first configuration information sent. The capabilities of the terminal device are measured by its hardware and software parameters. When the hardware and software parameters are greater than or less than the corresponding preset thresholds, the first random access type is a contention-based two-step random access type; otherwise, the first random access type is a contention-based four-step random access type. The length of the first random access type carried in the first configuration information is 1 bit.

10. The method according to claim 9, characterized in that, When the first configuration information includes: a first logical channel list corresponding to a contention-based two-step random access method; If the logical channel on which the BSR triggered by the uplink data of the terminal device is located is in the first logical channel list, then the first random access type is a contention-based two-step random access type. Otherwise, the first random access type is a contention-based four-step random access type.

11. The method according to claim 9, characterized in that, When the first configuration information includes: a list of second logical channels corresponding to a contention-based four-step random access method; If the logical channel on which the BSR triggered by the uplink data of the terminal device is located is in the second logical channel list, then the first random access type is a contention-based four-step random access type. Otherwise, the first random access type is a contention-based two-step random access type.

12. The method according to claim 9, characterized in that, When the first configuration information includes: a first logical channel list corresponding to a contention-based two-step random access method and a second logical channel list corresponding to a contention-based four-step random access method; If the logical channel on which the BSR triggered by the uplink data of the terminal device is located is in the first logical channel list, then the first random access type is a contention-based two-step random access type. If the logical channel on which the BSR triggered by the uplink data of the terminal device is located is in the second logical channel list, then the first random access type is a contention-based four-step random access type.

13. The method according to claim 9, characterized in that, When the first configuration information includes: a correspondence between at least one logical channel and at least one random access type; The first random access type is determined based on the logical channel of the BSR triggered by the uplink data of the terminal device and the corresponding relationship.

14. The method according to any one of claims 9-13, characterized in that, Also includes: The network device sends a contention-based two-step random access resource configuration and a contention-based four-step random access resource configuration to the terminal device.

15. The method according to any one of claims 9-13, characterized in that, The first configuration information is carried in the RRC signaling.

16. The method according to any one of claims 9-13, characterized in that, The first random access type is either a contention-based two-step random access type or a contention-based four-step random access type.

17. A terminal device, characterized in that, The terminal device is a terminal device in NTN, including: A communication unit is used to acquire first configuration information of a terminal device sent by a network device, wherein the first configuration information is used to determine a first random access type of the terminal device; Processing unit, used for: If the first random access type is a contention-based two-step random access type, and the measured RSRP is greater than or equal to the RSRP threshold, then a contention-based two-step random access method is used for random access. Otherwise, a contention-based four-step random access method will be used for random access; or, If the first random access type is a contention-based four-step random access type, and the measured RSRP is less than or equal to the RSRP threshold, then a contention-based four-step random access method is used for random access. Otherwise, a two-step random access method based on competition will be used for random access; The first configuration information includes the first random access type and any one of the following: The first logical channel list corresponding to the two-step random access method based on competition; The second logical channel list corresponding to the competition-based four-step random access method; The first logical channel list corresponding to the contention-based two-step random access method and the second logical channel list corresponding to the contention-based four-step random access method; A correspondence between at least one logical channel and at least one random access type; Wherein, if the first configuration information includes the first random access type, the communication unit is further configured to report the capabilities of the terminal device to the network device, wherein the capabilities of the terminal device are used by the network device to determine the first random access type and carry the first random access type in the first configuration information sent. The capabilities of the terminal device are measured by its hardware and software parameters. When the hardware and software parameters are greater than or less than the corresponding preset thresholds, the first random access type is a contention-based two-step random access type; otherwise, the first random access type is a contention-based four-step random access type. The length of the first random access type carried in the first configuration information is 1 bit.

18. The terminal device according to claim 17, characterized in that, When the first configuration information includes: a first logical channel list corresponding to a contention-based two-step random access method; If the logical channel on which the BSR triggered by the uplink data of the terminal device is located is in the first logical channel list, then the first random access type is a contention-based two-step random access type. Otherwise, the first random access type is a contention-based four-step random access type.

19. The terminal device according to claim 17, characterized in that, When the first configuration information includes: a list of second logical channels corresponding to a contention-based four-step random access method; If the logical channel on which the BSR triggered by the uplink data of the terminal device is located is in the second logical channel list, then the first random access type is a contention-based four-step random access type. Otherwise, the first random access type is a contention-based two-step random access type.

20. The terminal device according to claim 17, characterized in that, When the first configuration information includes: a first logical channel list corresponding to a contention-based two-step random access method and a second logical channel list corresponding to a contention-based four-step random access method; If the logical channel on which the BSR triggered by the uplink data of the terminal device is located is in the first logical channel list, then the first random access type is a contention-based two-step random access type. If the logical channel on which the BSR triggered by the uplink data of the terminal device is located is in the second logical channel list, then the first random access type is a contention-based four-step random access type.

21. The terminal device according to claim 17, characterized in that, When the first configuration information includes: a correspondence between at least one logical channel and at least one random access type; The first random access type is determined based on the logical channel of the BSR triggered by the uplink data of the terminal device and the corresponding relationship.

22. The terminal device according to any one of claims 17-21, characterized in that, The communication unit is also used to obtain contention-based two-step random access resource configuration and contention-based four-step random access resource configuration.

23. The terminal device according to any one of claims 17-21, characterized in that, The first configuration information is carried in the RRC signaling.

24. The terminal device according to any one of claims 17-21, characterized in that, The first random access type is either a contention-based two-step random access type or a contention-based four-step random access type.

25. A network device, characterized in that, The network device is a network device in NTN, including: A communication unit is configured to send first configuration information of the terminal device to the terminal device. The first configuration information is used to determine a first random access type of the terminal device, such that if the first random access type is a contention-based two-step random access type and the measured RSRP is greater than or equal to the RSRP threshold, the terminal device uses a contention-based two-step random access method for random access; otherwise, the terminal device uses a contention-based four-step random access method for random access; or, if the first random access type is a contention-based four-step random access type and the measured RSRP is less than or equal to the RSRP threshold, the terminal device uses a contention-based four-step random access method for random access; otherwise, the terminal device uses a contention-based two-step random access method for random access. The first configuration information includes the first random access type and any one of the following: The first logical channel list corresponding to the two-step random access method based on competition; The second logical channel list corresponding to the competition-based four-step random access method; The first logical channel list corresponding to the contention-based two-step random access method and the second logical channel list corresponding to the contention-based four-step random access method; A correspondence between at least one logical channel and at least one random access type; Wherein, if the first configuration information includes the first random access type, the communication unit is further configured to acquire the capabilities of the terminal device, wherein the capabilities of the terminal device are used by the network device to determine the first random access type and carry the first random access type in the first configuration information sent. The capabilities of the terminal device are measured by its hardware and software parameters. When the hardware and software parameters are greater than or less than the corresponding preset thresholds, the first random access type is a contention-based two-step random access type; otherwise, the first random access type is a contention-based four-step random access type. The length of the first random access type carried in the first configuration information is 1 bit.

26. The network device according to claim 25, characterized in that, When the first configuration information includes: a first logical channel list corresponding to a contention-based two-step random access method; If the logical channel on which the BSR triggered by the uplink data of the terminal device is located is in the first logical channel list, then the first random access type is a contention-based two-step random access type. Otherwise, the first random access type is a contention-based four-step random access type.

27. The network device according to claim 25, characterized in that, When the first configuration information includes: a list of second logical channels corresponding to a contention-based four-step random access method; If the logical channel on which the BSR triggered by the uplink data of the terminal device is located is in the second logical channel list, then the first random access type is a contention-based four-step random access type. Otherwise, the first random access type is a contention-based two-step random access type.

28. The network device according to claim 25, characterized in that, When the first configuration information includes: a first logical channel list corresponding to a contention-based two-step random access method and a second logical channel list corresponding to a contention-based four-step random access method; If the logical channel on which the BSR triggered by the uplink data of the terminal device is located is in the first logical channel list, then the first random access type is a contention-based two-step random access type. If the logical channel on which the BSR triggered by the uplink data of the terminal device is located is in the second logical channel list, then the first random access type is a contention-based four-step random access type.

29. The network device according to claim 25, characterized in that, When the first configuration information includes: a correspondence between at least one logical channel and at least one random access type; The first random access type is determined based on the logical channel of the BSR triggered by the uplink data of the terminal device and the corresponding relationship.

30. The network device according to any one of claims 25-29, characterized in that, The communication unit is also used to send contention-based two-step random access resource configuration and contention-based four-step random access resource configuration to the terminal device.

31. The network device according to any one of claims 25-29, characterized in that, The first configuration information is carried in the RRC signaling.

32. The network device according to any one of claims 25-29, characterized in that, The first random access type is either a contention-based two-step random access type or a contention-based four-step random access type.

33. A terminal device, characterized in that, include: A processor and a memory, the memory being used to store a computer program, the processor being used to invoke and run the computer program stored in the memory to perform the method as described in any one of claims 1 to 8.

34. A network device, characterized in that, include: A processor and a memory, the memory being used to store a computer program, the processor being used to invoke and run the computer program stored in the memory to perform the method as described in any one of claims 9 to 16.

35. A computer-readable storage medium, characterized in that, Used to store a computer program that causes a computer to perform the method as described in any one of claims 1 to 8.

36. A computer-readable storage medium, characterized in that, Used to store a computer program that causes a computer to perform the method as described in any one of claims 9 to 16.

37. A computer program product, characterized in that, It includes computer program instructions that cause a computer to perform the method as described in any one of claims 1 to 8.

38. A computer program product, characterized in that, It includes computer program instructions that cause a computer to perform the method as described in any one of claims 9 to 16.

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