Wireless communication method, terminal device and network device

Abstract

The embodiment of the present application provides a method, terminal device and network device for wireless communication, wherein a terminal device in an idle state or a deactivated state can obtain and / or update a TA during a random access process, thereby performing uplink synchronization based on the TA to achieve the transmission of an SRS. The wireless communication method includes: the terminal device receives a TA during a random access process; the terminal device transmits an SRS according to the TA; wherein the terminal device is in an idle state, or the terminal device is in a deactivated state.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of communications, and more specifically, to a wireless communication method, terminal equipment, and network equipment. Background Art

[0002] In the New Radio (NR) system, the configuration and transmission of the Sounding Reference Signal (SRS) are performed by the terminal device in the connected state. However, in some scenarios, the terminal device needs to send SRS in the idle state or deactivated state. How to implement SRS transmission in the idle state or deactivated state is an urgent problem to be solved. Summary of the invention

[0003] The embodiments of the present application provide a wireless communication method, terminal device and network device. The terminal device in an idle state or a deactivated state can obtain and / or update the TA during the random access process, thereby performing uplink synchronization based on the TA to achieve the sending of SRS.

[0004] In a first aspect, a wireless communication method is provided, the method comprising:

[0005] The terminal device receives the timing advance (TA) during the random access process;

[0006] The terminal device sends the SRS according to the TA;

[0007] The terminal device is in an idle state, or the terminal device is in a deactivated state.

[0008] In a second aspect, a wireless communication method is provided, the method comprising:

[0009] The network device sends a TA to the terminal device during a random access process, wherein the TA is used by the terminal device to send an SRS, and the terminal device is in an idle state, or the terminal device is in a deactivated state.

[0010] In a third aspect, a terminal device is provided for executing the method in the first aspect.

[0011] Specifically, the terminal device includes a functional module for executing the method in the above-mentioned first aspect.

[0012] In a fourth aspect, a network device is provided for executing the method in the second aspect.

[0013] Specifically, the network device includes a functional module for executing the method in the above second aspect.

[0014] In a fifth aspect, a terminal device is provided, comprising a processor and a memory, wherein 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 execute the method in the first aspect.

[0015] In a sixth aspect, a network device is provided, comprising a processor and a memory, wherein 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 execute the method in the second aspect.

[0016] In a seventh aspect, a device is provided for implementing the method in any one of the first to second aspects above.

[0017] Specifically, the apparatus includes: a processor, configured to call and run a computer program from a memory, so that a device equipped with the apparatus executes the method in any one of the first to second aspects described above.

[0018] In an eighth aspect, a computer-readable storage medium is provided for storing a computer program, wherein the computer program enables a computer to execute the method in any one of the first to second aspects above.

[0019] In a ninth aspect, a computer program product is provided, comprising computer program instructions, wherein the computer program instructions enable a computer to execute the method in any one of the first to second aspects above.

[0020] In a tenth aspect, a computer program is provided, which, when executed on a computer, enables the computer to execute the method in any one of the first to second aspects above.

[0021] Through the above technical solution, a terminal device in an idle state or a deactivated state can obtain and / or update the TA during the random access process, and send an SRS according to the TA. That is, the terminal device can achieve uplink synchronization based on the TA in the idle state or the deactivated state, thereby ensuring that the terminal device can send the SRS in the idle state or the deactivated state. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of a communication system architecture applied in an embodiment of the present application.

[0023] Figure 2 It is a schematic diagram comparing 4-step random access and 2-step random access provided in the present application.

[0024] Figure 3 It is a schematic flowchart of a wireless communication method provided according to an embodiment of the present application.

[0025] Figure 4 It is a schematic block diagram of a terminal device provided according to an embodiment of the present application.

[0026] Figure 5 It is a schematic block diagram of a network device provided according to an embodiment of the present application.

[0027] Figure 6 It is a schematic block diagram of a communication device provided according to an embodiment of the present application.

[0028] Figure 7 It is a schematic block diagram of a device provided according to an embodiment of the present application.

[0029] Figure 8 It is a schematic block diagram of a communication system provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0030] The following will describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. For the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] The technical solutions of the embodiments of the present application 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, New Radio (NR) system, NR system evolution system, LTE on unlicensed spectrum (LTE-U) system, NR on unlicensed spectrum (NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (Wireless Fidelity) system. Fidelity, WiFi), fifth-generation communication (5th-Generation, 5G) system or other communication systems, etc.

[0032] Generally speaking, traditional communication systems 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 communications, but will also support, for example, device to device (Device to Device, D2D) communication, machine to machine (Machine to Machine, M2M) communication, machine type communication (Machine Type Communication, MTC), vehicle to vehicle (V2V) communication, or vehicle to everything (V2X) communication, etc. The embodiments of the present application can also be applied to these communication systems.

[0033] Optionally, the communication system in the embodiment of the present application can be applied to a carrier aggregation (CA) scenario, a dual connectivity (DC) scenario, or a standalone (SA) networking scenario.

[0034] Optionally, the communication system in the embodiment of the present application can be applied to an unlicensed spectrum, wherein the unlicensed spectrum can also be considered as a shared spectrum; or, the communication system in the embodiment of the present application can also be applied to an authorized spectrum, wherein the authorized spectrum can also be considered as an unshared spectrum.

[0035] The embodiments of the present application describe 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.

[0036] The terminal device can be a station (STATION, ST) in a WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a next-generation communication system such as an NR network, or a terminal device in a future evolved Public Land Mobile Network (PLMN) network, etc.

[0037] In the embodiments of the present application, the terminal device can be deployed on land, including indoors or outdoors, handheld, wearable or vehicle-mounted; it can also be deployed on the water surface (such as ships, etc.); it can also be deployed in the air (for example, on airplanes, balloons and satellites, etc.).

[0038] In the embodiment of the present application, the terminal device can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self driving, a wireless terminal device in remote medical, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, or a wireless terminal device in a smart home, etc.

[0039] As an example but not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable devices may also be referred to as wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also powerful functions achieved through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include full-featured, large-sized, and fully or partially independent of smartphones, such as smart watches or smart glasses, as well as devices that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various types of smart bracelets and smart jewelry for vital sign monitoring.

[0040] In an embodiment of the present application, the network device may be a device for communicating with a mobile device. The network device may be an access point (AP) in WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA, a base station (NodeB, NB) in WCDMA, an evolved base station (EvolutionalNode B, eNB or eNodeB) in LTE, or a relay station or access point, or a vehicle-mounted device, a wearable device, and a network device or base station (gNB) in an NR network, or a network device in a future evolved PLMN network, or a network device in an NTN network, etc.

[0041] As an example but not limitation, in an embodiment of the present application, the network device may have a mobile characteristic, for example, the network device may be a mobile device. Optionally, the network device may be a satellite or a balloon station. For example, the satellite may be a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, a high elliptical orbit (HEO) satellite, etc. Optionally, the network device may also be a base station set up in a location such as land or water.

[0042] In an embodiment of the present application, the network device can provide services for a cell, and the terminal device communicates with the network device through the transmission resources used by the cell (for example, frequency domain resources, or spectrum resources). The cell can be a cell corresponding to the network device (for example, a base station), and the cell can belong to a macro base station or a base station corresponding to a small cell. The small cells here may include: metro cells, micro cells, pico cells, femto cells, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

[0043] For example, the communication system 100 used in the embodiment of the present application is as follows: Figure 1 The communication system 100 may include a network device 110, which may be a device that communicates with a terminal device 120 (or a communication terminal or terminal). The network device 110 may provide communication coverage for a specific geographical area and may communicate with terminal devices located in the coverage area.

[0044] Figure 1 One network device and two terminal devices are shown exemplarily. Optionally, the communication system 100 may include multiple network devices and each network device may include another number of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

[0045] Optionally, the communication system 100 may also include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiments of the present application.

[0046] It should be understood that the device with communication function in the network / system in the embodiment of the present application can be referred to as a communication device. Figure 1Taking the communication system 100 shown as an example, the communication equipment may include a network device 110 and a terminal device 120 with communication functions. The network device 110 and the terminal device 120 may be the specific devices described above and will not be repeated here. The communication equipment may also include other devices in the communication system 100, such as a network controller, a mobile management entity and other network entities, which is not limited in the embodiments of the present application.

[0047] It should be understood that the terms "system" and "network" are often used interchangeably in this article. The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0048] The terms used in the implementation mode of this application are only used to explain the specific embodiments of this application, and are not intended to limit this application. The terms "first", "second", "third" and "fourth" in the specification and claims of this application and the drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0049] It should be understood that the "indication" mentioned in the embodiments of the present application can be a direct indication, an indirect indication, or an indication of an association relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association relationship between A and B.

[0050] In the description of the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between two items, or an association relationship between the two items, or a relationship between indication and being indicated, configuration and being configured, and the like.

[0051] In NR Release 15, the random access process is triggered by the following events:

[0052] -Radio Resource Control (RRC) connection reestablishment process;

[0053] - Initial access initiated in RRC idle (RRC_IDLE) state;

[0054] - In the RRC_CONNECTED state, the uplink is in the "out of sync" state when downlink or uplink data arrives;

[0055] - In the RRC_CONNECTED state, when uplink data arrives, there is no available Physical Uplink Control Channel (PUCCH) resource for Scheduling Request (SR) transmission;

[0056] -SR failed;

[0057] - Synchronous reconfiguration request initiated by RRC (e.g. handover);

[0058] -Transition from the RRC deactivated (RRC_INACTIVE) state to the RRC_CONNECTED state;

[0059] - Establishing time alignment on the secondary cell (SCell);

[0060] -Request additional system information;

[0061] -Beam failure recovery.

[0062] In NR, the random access process is divided into two forms: contention-based random access and non-contention-based random access.

[0063] The contention-based 4-step random access procedure (4-step RACH) is implemented through the following four steps.

[0064] Step 1: Random access resource selection and random access preamble transmission (the first message (message 1, Msg1)).

[0065] Random access resource selection: The network device sends random access related parameters to the terminal by broadcasting System Information Block (SIB) 1, where the RSRP threshold (rsrp-ThresholdSSB) for SSB in the Random Access Channel Common Configuration Information elements (RACH-ConfigCommon IE) is used for the synchronization signal block (SSB) selection of the terminal device. The terminal compares the reference signal received power (RSRP) measurement result under each SSB with the rsrp-ThresholdSSB, and selects the SSB with a measurement value higher than the configured threshold for access. If there is no SSB that meets the configured threshold, a random access is selected from all SSBs for access. Each SSB corresponds to a set of Preamble resources and Random Access Channel Occasion (RO) resources. The terminal device randomly selects from the selected SSB for contention-based random access resources and sets the random access preamble index (PREAMBLE_INDEX) to the selected random access preamble. Based on the received Preamble, the network device can estimate the uplink timing and the size of the grant resources required for the terminal device to transmit the third message (message 3, Msg3). In order to allow the network device to more accurately understand the size of the Msg3 to be transmitted and allocate appropriate uplink resources, the Preamble is divided into Preamble group A and Preamble group B. If Preamble group B exists in the random access resource, the terminal device selects the Preamble group according to the size of Msg3 and path loss.

[0066] Step 2: The network device transmits a random access response (Random Access Response, RAR) (the second message (message 2, Msg2)) to the terminal device.

[0067] After the terminal device sends Msg1, it opens the random access response time window (ra-ResponseWindow), and receives the network device's reply to Msg1 during the operation of ra-ResponseWindow, that is, the RAR message (Msg2). The RAR message is received through the physical downlink control channel (PDCCH) scrambled by the random access radio network temporary identifier (RA-RNTI). RA-RNTI is calculated based on the time-frequency position of the physical random access channel (PRACH) that sends the Preamble. Therefore, if multiple terminal devices send Preambles on the same RO, the corresponding RARs are multiplexed in the same RAR media access control (MAC) protocol data unit (PDU). If the terminal device successfully receives the RA-RNTI-encrypted PDCCH corresponding to the RO resource that sends the Preamble, and the RAR contains a MAC sub-PDU carrying a random access preamble sequence identifier (Random Access Preamble ID, RAPID) corresponding to the PREAMBLE_INDEX selected in Step 1, then the RAR is received successfully, and the terminal device can decode the timing advance command (Timing Advance Command, TAC), uplink authorization (UL Grant) and temporary cell radio network temporary identifier (Temporary Cell Radio Network Temporary Identity, TC-RNTI), and proceed to Step 3.

[0068] If the RA-RNTI-scrambled PDCCH corresponding to the RO resource sending the Preamble is not received during the operation of the ra-ResponseWindow, or the RA-RNTI-scrambled PDCCH is received but the RAR does not contain the MAC subPDU corresponding to PREAMBLE_INDEX, the RAR reception is considered to have failed when the above two situations occur. At this time, if the number of Preamble transmissions does not exceed the maximum number of Preamble transmissions (preambleTransMax) configured by the network, the terminal device needs to retransmit Msg1, as described in Step 1. If the number of Preamble transmissions exceeds the preambleTransMax configured by the network, the terminal device reports the random access problem to the upper layer.

[0069] Step 3: The terminal device uses the scheduling resources to transmit the RRC message (the third message (message 3, Msg3)) to the network device.

[0070] The Msg3 message is mainly used to inform the network device of what event triggered the RACH process. For example, if it is the initial access random process, the terminal equipment identifier (UE ID) and the establishment cause (establishment cause) will be carried in Msg3; if it is RRC reconstruction, the connected UE ID and establishment cause will be carried. Msg3 needs to contain the unique identifier of the UE for conflict resolution in Step 4. For terminal devices in the RRC_CONNECTED state, its unique identifier is the Cell Radio Network Temporary Identity (C-RNTI). For terminal devices in non-RRC_CONNECTED state, a unique terminal identifier from the core network (Serving-Temporary Mobile Subscriber Identity (S-TMSI) or a random number) will be used.

[0071] Step 4: Contention conflict resolution (the fourth message (message 4, Msg4)).

[0072] Msg4 has two functions: one is to resolve contention conflicts; the second is to transmit RRC configuration messages to terminal devices. After sending Msg3, the terminal device starts the random access contention resolution timer (ra-ContentionResolutionTimer). During the operation of ra-ContentionResolutionTimer, the terminal device monitors the PDCCH scrambled by C-RNTI or TC-RNTI. For terminal devices in the RRC_CONNECTED state, receiving the PDCCH scrambled by C-RNTI is considered to have successfully resolved the contention conflict; for terminal devices in the non-RRC_CONNECTED state, receiving the PDCCH scrambled by TC-RNTI, when the identifier (ID) contained in the MAC PDU corresponding to the successfully decoded Msg4 matches the common control channel (CCCH) service data unit (SDU) sent by Msg3, the contention conflict is considered to have been successfully resolved. Otherwise (Timer times out or contention resolution fails), if the number of Preamble transmissions does not exceed the maximum number of transmissions preambleTransMax configured by the network, the terminal needs to retransmit Msg1, the steps are as described in Step 1, if the number of Preamble transmissions exceeds the maximum number of transmissions preambleTransMax configured by the network, the terminal reports the random access problem to the upper layer.

[0073] It should be noted that the two-step random access (2-step RACH) process was introduced in NR Release 16 to reduce the delay and signaling overhead in the four-step random access (4-step RACH) process. Figure 2The figure is a comparison between 2-step RACH and 4-step RACH. In the 2-step RACH process, the first message (message A, MsgA) in the two-step random access contains the preamble transmitted on the PRACH and the load information (Msg3) transmitted on the physical uplink shared channel (Physical Uplink Shared Channel, PUSCH). After the transmission of MsgA, the terminal device listens to the response of the network side within the configured window. If the terminal device receives an indication of successful contention resolution from the network device, the terminal device ends the random access process; if the second message (message B, MsgB) in the two-step random access receives a fallback indication, the terminal device executes the transmission of Msg3 and listens to the contention resolution result; if the contention resolution fails after the transmission of Msg3, the terminal device continues to try to transmit MsgA. In addition, the network device can configure the maximum number of 2-step RACH attempts 'N' for the terminal device. When the terminal device fails to access after trying 2-step RACH 'N' times, the terminal device can switch to the 4-step RACH process to continue the access attempt.

[0074] It should be understood that location is one of the indispensable applications in our lives today, and the requirements for latency and accuracy of positioning are becoming more and more stringent. In many positioning applications, accurate positioning is usually achieved through a combination of multiple technologies, such as 1) providing location information in outdoor scenes based on the Global Navigation Satellite System (GNSS); 2) radio technology (such as LTE networks, providing multiple options to locate users, wireless networks, ground beacon systems, etc.); 3) Inertial Measurement Units (IMU) or sensors (such as tracking user position based on accelerometers, gyroscopes, magnetometers, or vertical positioning using atmospheric pressure sensors). These technologies are expected to play an important role in achieving accurate user positioning in the future.

[0075] The enhanced positioning capabilities of the 3rd Generation Partnership Project (3GPP) NR bring additional gains. Operation in low and high frequency bands (i.e., FR1 and FR2) and the use of large antenna arrays provide additional degrees of freedom, greatly improving positioning accuracy. Positioning techniques such as observed time difference of arrival (OTDOA) and uplink time difference of arrival (UTDOA), cell-ID or enhanced cell-ID (E-Cell-ID) based positioning, using large bandwidth (low frequency band as well as high frequency band) for time measurement bring better performance for user positioning. Using large-scale antenna systems, such as massive multiple-input multiple-output (massive MIMO) systems, more accurate user location is achieved by combining time measurements as well as the spatial and angular domains of the propagation channel.

[0076] The sounding reference signal (SRS) is one of the main reference signals used for positioning. Based on the SRS sent by the terminal device, the network equipment can measure the arrival time, signal strength, arrival inclination, etc., so as to determine the location information of the terminal device. In addition, the sounding reference signal (SRS) is also one of the main reference signals for uplink measurement. The terminal device can perform uplink beam management based on the SRS signal to determine the analog beam used for uplink transmission.

[0077] The activation and deactivation of the SRS may be implemented based on a Media Access Control Control Element (MAC CE) signaling, where the MAC CE signaling is used to activate / deactivate the SRS used for positioning and its corresponding spatial relation.

[0078] It should be noted that at present, the configuration and transmission of SRS are performed when the terminal device is in the connected state, because the terminal device is synchronized with the network side when in the connected state. Then when the terminal device enters the idle state or the inactive state, it cannot receive the network side configuration and send SRS because it is not synchronized with the network. In addition, the terminal device can enter the connected state to obtain the TA through random access, but if the terminal device enters the connected state only to obtain the TA for sending SRS, it will cause additional signaling overhead and additional power consumption.

[0079] Based on the above problems, the present application proposes a solution for sending SRS, whereby a terminal device in an idle state or a deactivated state can obtain and / or update TA during random access, and send SRS according to TA. That is, the terminal device can achieve uplink synchronization based on TA in an idle state or a deactivated state, thereby ensuring that the terminal device can send SRS in an idle state or a deactivated state.

[0080] The technical solution of the present application is described in detail below through specific embodiments.

[0081] Figure 3 is a schematic flow chart of a wireless communication method 200 according to an embodiment of the present application, such as Figure 3 As shown, the method 200 may include at least part of the following contents:

[0082] S210, the network device sends a TA to the terminal device during a random access process, wherein the terminal device is in an idle state, or the terminal device is in a deactivated state;

[0083] S220, the terminal device receives the TA during the random access process;

[0084] S230, the terminal device sends an SRS according to the TA.

[0085] In an embodiment of the present application, a terminal device in an idle state or a deactivated state can receive a TA during a random access process, and achieve uplink synchronization based on the received TA, thereby ensuring that the terminal device can send an SRS in an idle state or a deactivated state.

[0086] In addition, a terminal device in an idle state or deactivated state can update the TA through a random access process to ensure the accuracy of the TA. That is, before initiating the random access process, the terminal device has already acquired a TA. Assuming that the TA acquired before the random access process is TA0, in this case, TA0 has become invalid, that is, the terminal device cannot achieve uplink synchronization based on TA0.

[0087] It should be noted that in the embodiment of the present application, the terminal device can also be in other states besides the connected state, and is not limited to the idle state and the deactivated state. In addition, in the embodiment of the application, the deactivated state can also be referred to as the inactive state, which is not limited in the present application.

[0088] It should be noted that in the embodiment of the present application, the terminal device can send SRS in an idle state or a deactivated state, that is, the terminal device does not need to enter a connected state before sending SRS, thereby achieving terminal energy saving.

[0089] Optionally, in the embodiment of the present application, the SRS includes at least one of the following:

[0090] SRS used for uplink measurement and SRS used for positioning.

[0091] Optionally, in an embodiment of the present application, the TA represents the timing advance between the terminal device and the network device. Alternatively, the TA represents the timing advance between the reference point in the cell where the terminal device resides and the base station. Alternatively, the TA represents the timing advance between the reference point in the cell where the terminal device resides and the network device. Alternatively, the TA represents the timing advance between the reference point in the cell where the terminal device resides and the access network device.

[0092] Optionally, the reference point is located at the edge of the resident cell, or the reference point is located at the center of the resident cell, or the reference point is the position of the terminal device in the resident cell, or the reference point is a preconfigured or protocol-agreed position in the resident cell.

[0093] It should be noted that, in some cases, the resident cell may also be understood as the cell where the terminal device is currently located, or the resident cell may also be understood as the serving cell before the terminal device enters the idle state / inactive state.

[0094] Optionally, in an embodiment of the present application, the terminal device may specifically receive the TA during the random access process through the following schemes of Example 1 and Example 2.

[0095] Example 1: The terminal device sends first random access information to the network device, and the first random access information includes request information, and the request information is used to request to update the TA, and / or the request information is used to request to return to an idle state or a deactivated state; the terminal device receives second random access information sent by the network device, and the second random access information includes the TA.

[0096] That is to say, in Example 1, the terminal device can explicitly instruct the network device through the request information that the purpose of initiating random access is to obtain the TA.

[0097] It should be noted that in Example 1, when the terminal device in the idle state or the deactivated state needs to update the TA, or when the terminal device in the idle state or the deactivated state needs to obtain the TA, the terminal device sends the first random access information to the network device.

[0098] In Example 1, after the network device receives the request information included in the first random access information, it can be determined that the terminal device initiates the random access process in order to obtain the TA. In this case, the network device will not allocate uplink grant (UL grant) resources to the terminal device, nor will it send configuration information to the terminal device, nor will it send downlink data and downlink resource configuration information to the terminal device.

[0099] That is, in Example 1, the second random access information does not include at least one of the following information:

[0100] Uplink resource authorization, uplink resource configuration, downlink data, configuration information.

[0101] In addition, the second random access information may also include some other information, such as a random access preamble, C-RNTI, and TC-RNTI.

[0102] Optionally, in Example 1, the second random access information includes indication information, and the indication information is used to instruct the terminal device to return to an idle state or a deactivated state.

[0103] Optionally, in Example 1, after receiving the second random access information, the terminal device ignores entering the connected state.

[0104] Optionally, in Example 1, the network device does not expect the terminal device to enter a connected state.

[0105] In Example 1, for example, the first random access information is the first information (Msg1) in the four-step random access, and the second random access information is the second information (Msg2) in the four-step random access. That is, when a terminal device in an idle state or a deactivated state needs to update the TA, or when a terminal device in an idle state or a deactivated state needs to obtain the TA, the terminal device sends Msg1 to the network device, and the Msg1 includes request information, and the request information is used to request to update the TA, and / or the request information is used to request to return to the idle state or the deactivated state. After receiving the Msg1, the network device can determine, based on the request information, that the terminal device initiated the random access process in order to obtain the TA, and send Msg2 to the terminal device. In this case, the Msg2 includes the TA. In addition, in the Msg2, the network device will not allocate uplink authorization (UL grant) resources to the terminal device, nor will it send configuration information to the terminal device, nor will it send downlink data and downlink resource configuration information to the terminal device. After receiving the Msg2, the terminal device may send an SRS based on the TA carried in the Msg2, and the terminal device ignores entering a connected state.

[0106] In Example 1, for another example, the first random access information is the first information (Msg1) in the four-step random access, and the second random access information is the fourth information (Msg4) in the four-step random access. That is, when a terminal device in an idle state or a deactivated state needs to update the TA, or when a terminal device in an idle state or a deactivated state needs to obtain the TA, the terminal device sends Msg1 to the network device, and the Msg1 includes request information, and the request information is used to request to update the TA, and / or the request information is used to request to return to the idle state or the deactivated state. After receiving the Msg1, the network device can determine, based on the request information, that the terminal device initiated the random access process in order to obtain the TA, and send Msg4 to the terminal device. In this case, the Msg4 includes the TA. In addition, in the Msg4, the network device will not allocate uplink authorization (UL grant) resources to the terminal device, nor will it send configuration information to the terminal device, nor will it send downlink data and downlink resource configuration information to the terminal device. After receiving the Msg4, the terminal device may send an SRS based on the TA carried in the Msg4, and the terminal device ignores entering a connected state.

[0107] In Example 1, for another example, the first random access information is the third information (Msg3) in the four-step random access, and the second random access information is the fourth information (Msg4) in the four-step random access. That is, when a terminal device in an idle state or a deactivated state needs to update the TA, or when a terminal device in an idle state or a deactivated state needs to obtain the TA, the terminal device sends a Msg3 to the network device, and the Msg3 includes a request information, and the request information is used to request to update the TA, and / or the request information is used to request to return to the idle state or the deactivated state. After receiving the Msg3, the network device can determine, based on the request information, that the terminal device initiated the random access process in order to obtain the TA, and send a Msg4 to the terminal device. In this case, the Msg4 includes the TA. In addition, in the Msg4, the network device will not allocate uplink authorization (UL grant) resources to the terminal device, nor will it send configuration information to the terminal device, nor will it send downlink data and downlink resource configuration information to the terminal device. After receiving the Msg4, the terminal device may send an SRS based on the TA carried in the Msg4, and the terminal device ignores entering a connected state.

[0108] In Example 1, for another example, the first random access information is the first information (MsgA) in the two-step random access, and the second random access information is the second information (MsgB) in the two-step random access. That is, when a terminal device in an idle state or a deactivated state needs to update the TA, or when a terminal device in an idle state or a deactivated state needs to obtain the TA, the terminal device sends an MsgA to the network device, and the MsgA includes request information, and the request information is used to request to update the TA, and / or the request information is used to request to return to the idle state or the deactivated state. After receiving the MsgA, the network device can determine, based on the request information, that the terminal device initiated the random access process in order to obtain the TA, and send an MsgB to the terminal device. In this case, the MsgB includes the TA. In addition, in the MsgB, the network device will not allocate uplink authorization (UL grant) resources to the terminal device, nor will it send configuration information to the terminal device, nor will it send downlink data and downlink resource configuration information to the terminal device. After receiving the MsgB, the terminal device may send an SRS based on the TA carried in the MsgB, and the terminal device ignores entering a connected state.

[0109] Example 2: The terminal device sends first random access information based on a first random access resource, where the first random access resource is used by the terminal device to initiate a random access process for updating a TA in an idle state or a deactivated state; the terminal device receives second random access information, where the second random access information includes the TA.

[0110] That is to say, in Example 2, the terminal device can implicitly indicate to the network device through the first random access resource that the purpose of initiating random access is to obtain the TA.

[0111] It should be noted that in Example 2, the first random access resource is a specific random access resource. After the network device determines that the terminal device initiates a random access process according to the first random access resource, it can be determined that the terminal device initiates the random access process in order to obtain the TA. In this case, the network device will not allocate uplink authorization (UL grant) resources to the terminal device, nor will it send configuration information to the terminal device, nor will it send downlink data and downlink resource configuration information to the terminal device.

[0112] That is, in Example 2, the second random access information does not include at least one of the following information:

[0113] Uplink resource authorization, uplink resource configuration, downlink data, configuration information.

[0114] In addition, the second random access information may also include some other information, such as a random access preamble, C-RNTI, and TC-RNTI.

[0115] Optionally, in Example 2, the second random access information includes indication information, and the indication information is used to instruct the terminal device to return to an idle state or a deactivated state.

[0116] Optionally, in Example 2, after receiving the second random access information, the terminal device ignores entering the connected state.

[0117] Optionally, in Example 2, the network device does not expect the terminal device to enter a connected state.

[0118] Optionally, in an implementation manner of Example 2, the first random access resource is a contention-free random access (Contention Free Random Access, CFRA) resource.

[0119] Optionally, when the first random access resource is a CFRA resource, the first random access resource is valid during the operation of the first timer. When the first timer times out or stops, the first random access resource becomes invalid. When the first random access resource becomes invalid, the terminal device cannot send the first random access information according to the first random access resource.

[0120] That is to say, in the case that the first random access resource is a CFRA resource, the first random access resource is a resource with a specific time limit, and after it becomes invalid, the network device can reconfigure the first random access resource.

[0121] Optionally, the start or restart condition of the first timer includes at least one of the following:

[0122] The terminal device enters an idle state or a deactivated state;

[0123] The terminal device receives configuration information for the first timer;

[0124] The terminal device receives configuration information for the first random access resource;

[0125] The terminal device receives indication information for updating the configuration of the first timer.

[0126] Optionally, in Example 2, the terminal device receives first configuration information sent by the network device, where the first configuration information is used to configure the first random access resource and / or the first timer.

[0127] For example, the first configuration information may configure the start or restart conditions of the first timer, the duration of the first timer, etc.

[0128] For example, when the terminal device is in a connected state, the terminal device receives the first configuration information. Correspondingly, when the terminal device is in a connected state, the network device sends the first configuration information to the terminal device.

[0129] Optionally, the first configuration information is carried in RRC release information. After receiving the RRC release information, the terminal device enters an idle state or a deactivated state.

[0130] Optionally, when the first random access resource is a CFRA resource, the first random access resource is a resource exclusive to the terminal device.

[0131] Optionally, when the first random access resource is a CFRA resource, the first random access resource includes at least one of the following:

[0132] Random access preamble, time and frequency resources.

[0133] For example, the time-frequency resources included in the first random access resources may specifically be time-frequency resources for sending Msg1 or MsgA, and may specifically include PRACH resources, or PUSCH resources.

[0134] Optionally, in another implementation of Example 2, the first random access resource is a contention-based random access process (Contention Based Random Access, CBRA) resource.

[0135] Optionally, when the first random access resource is a CBRA resource, the first random access resource is a target random access preamble, or the first random access resource is a target random access time-frequency resource. The first random access resource is pre-configured or agreed upon by a protocol, or the first random access resource is configured by the network device.

[0136] In Example 2, for example, the first random access information is the first information (Msg1) in the four-step random access, and the second random access information is the second information (Msg2) in the four-step random access. That is, when the terminal device in the idle state or the deactivated state needs to update the TA, or when the terminal device in the idle state or the deactivated state needs to obtain the TA, the terminal device sends Msg1 to the network device according to the first random access resource. After receiving the Msg1, the network device can determine that the random access process initiated by the terminal device is to obtain the TA according to the first random access resource, and send Msg2 to the terminal device. In this case, the Msg2 includes the TA. In addition, in the Msg2, the network device will not allocate uplink authorization (UL grant) resources to the terminal device, nor will it send configuration information to the terminal device, nor will it send downlink data and downlink resource configuration information to the terminal device. After receiving the Msg2, the terminal device can send SRS based on the TA carried in the Msg2, and the terminal device ignores entering the connected state.

[0137] In Example 2, for another example, the first random access information is the first information (Msg1) in the four-step random access, and the second random access information is the fourth information (Msg4) in the four-step random access. That is, when the terminal device in the idle state or the deactivated state needs to update the TA, or when the terminal device in the idle state or the deactivated state needs to obtain the TA, the terminal device sends Msg1 to the network device according to the first random access resource. After receiving the Msg1, the network device can determine that the terminal device has initiated a random access process in order to obtain the TA according to the first random access resource, and send Msg4 to the terminal device. In this case, the Msg4 includes the TA. In addition, in the Msg4, the network device will not allocate uplink authorization (UL grant) resources to the terminal device, nor will it send configuration information to the terminal device, nor will it send downlink data and downlink resource configuration information to the terminal device. After receiving the Msg4, the terminal device can send an SRS based on the TA carried in the Msg4, and the terminal device ignores entering the connected state.

[0138] In Example 2, for another example, the first random access information is the third information (Msg3) in the four-step random access, and the second random access information is the fourth information (Msg4) in the four-step random access. That is, when the terminal device in the idle state or the deactivated state needs to update the TA, or when the terminal device in the idle state or the deactivated state needs to obtain the TA, the terminal device sends Msg3 to the network device according to the first random access resource. After receiving the Msg3, the network device can determine that the terminal device initiates the random access process in order to obtain the TA according to the first random access resource, and sends Msg4 to the terminal device. In this case, the Msg4 includes the TA. In addition, in the Msg4, the network device will not allocate uplink authorization (UL grant) resources to the terminal device, nor will it send configuration information to the terminal device, nor will it send downlink data and downlink resource configuration information to the terminal device. After receiving the Msg4, the terminal device can send SRS based on the TA carried in the Msg4, and the terminal device ignores entering the connected state.

[0139] In Example 2, for another example, the first random access information is the first information (MsgA) in the two-step random access, and the second random access information is the second information (MsgB) in the two-step random access. That is, when the terminal device in the idle state or the deactivated state needs to update the TA, or when the terminal device in the idle state or the deactivated state needs to obtain the TA, the terminal device sends MsgA to the network device according to the first random access resource. After receiving the MsgA, the network device can determine that the terminal device has initiated a random access process in order to obtain the TA according to the first random access resource, and send MsgB to the terminal device. In this case, the MsgB includes the TA. In addition, in the MsgB, the network device will not allocate uplink authorization (UL grant) resources to the terminal device, nor will it send configuration information to the terminal device, nor will it send downlink data and downlink resource configuration information to the terminal device. After receiving the MsgB, the terminal device can send SRS based on the TA carried in the MsgB, and the terminal device ignores entering the connected state.

[0140] Optionally, in some embodiments, after the terminal device leaves the TA valid area, the terminal device updates the TA during the random access process through the scheme of Example 1 or Example 2 above.

[0141] Optionally, the TA effective area includes at least one of the following:

[0142] Cell coverage, RAN coverage, Tracking Area, a specific area in the SRS valid area.

[0143] Optionally, when the TA effective area is the coverage of a cell, the terminal device determines whether to leave the coverage of the cell according to a physical cell identifier (PCI) in a system message.

[0144] For example, when the TA effective area is the coverage of a cell, the terminal device can determine whether to leave the coverage of the cell according to whether the PCI in the system message changes.

[0145] Therefore, in the embodiment of the present application, the terminal device can obtain and / or update the TA in the idle state or the deactivated state, and send the SRS according to the TA. That is, the terminal device can achieve uplink synchronization based on the TA in the idle state or the deactivated state, thereby ensuring that the terminal device can send the SRS in the idle state or the deactivated state.

[0146] Combination of the above Figure 3 , describes in detail the method embodiment of the present application, and the following is combined with Figures 4 to 8 , the device embodiments of the present application are described in detail. It should be understood that the device embodiments and the method embodiments correspond to each other, and similar descriptions can refer to the method embodiments.

[0147] Figure 4 FIG. 3 shows a schematic block diagram of a terminal device 300 according to an embodiment of the present application. Figure 4 As shown, the terminal device 300 includes:

[0148] The communication unit 310 is configured to receive a timing advance TA during a random access process;

[0149] The communication unit 310 is further configured to send a sounding reference signal SRS according to the TA;

[0150] The terminal device is in an idle state, or the terminal device is in a deactivated state.

[0151] Optionally, the communication unit 310 is specifically configured to:

[0152] Sending first random access information, where the first random access information includes request information, where the request information is used to request updating of the TA, and / or where the request information is used to request returning to an idle state or a deactivated state;

[0153] Second random access information is received, where the second random access information includes the TA.

[0154] Optionally, the communication unit 310 is specifically configured to:

[0155] Sending first random access information according to a first random access resource, where the first random access resource is used by the terminal device to initiate a random access process for updating the TA in an idle state or a deactivated state;

[0156] Second random access information is received, where the second random access information includes the TA.

[0157] Optionally, the first random access resource is valid during the running of the first timer.

[0158] Optionally, the start or restart condition of the first timer includes at least one of the following:

[0159] The terminal device enters an idle state or a deactivated state;

[0160] The terminal device receives configuration information for the first timer;

[0161] The terminal device receives configuration information for the first random access resource;

[0162] The terminal device receives indication information for updating the configuration of the first timer.

[0163] Optionally, the communication unit 310 is further used to receive first configuration information, where the first configuration information is used to configure the first random access resource and / or the first timer.

[0164] Optionally, the communication unit 310 is specifically configured to:

[0165] When the terminal device is in a connected state, the first configuration information is received.

[0166] Optionally, the first configuration information is carried in RRC release information.

[0167] Optionally, the first random access resource is a resource exclusive to the terminal device.

[0168] Optionally, the first random access resource includes at least one of the following:

[0169] Random access preamble, time and frequency resources.

[0170] Optionally, the first random access resource is a contention-free random access CFRA resource.

[0171] Optionally, the first random access resource is a target random access preamble code, or the first random access resource is a target random access time-frequency resource.

[0172] Optionally, the first random access resource is pre-configured or agreed upon by a protocol, or the first random access resource is configured by a network device.

[0173] Optionally, the first random access resource is a contention-based random access CBRA resource.

[0174] Optionally, the second random access information includes indication information, and the indication information is used to instruct the terminal device to return to an idle state or a deactivated state.

[0175] Optionally, the second random access information does not include at least one of the following information:

[0176] Uplink resource authorization, uplink resource configuration, downlink data, configuration information.

[0177] Optionally, the terminal device 300 further includes: a processing unit 320,

[0178] After receiving the second random access information, the processing unit 320 is configured to ignore entering the connected state.

[0179] Optionally, the first random access information is the first piece of information in a four-step random access, and the second random access information is the second piece of information in a four-step random access; or,

[0180] The first random access information is the first piece of information in a four-step random access, and the second random access information is the fourth piece of information in the four-step random access; or,

[0181] The first random access information is the third piece of information in the four-step random access, and the second random access information is the fourth piece of information in the four-step random access; or,

[0182] The first random access information is the first piece of information in the two-step random access, and the second random access information is the second piece of information in the two-step random access.

[0183] Optionally, in some embodiments, the communication unit may be a communication interface or a transceiver, or an input / output interface of a communication chip or a system on chip. The processing unit may be one or more processors.

[0184] It should be understood that the terminal device 300 according to the embodiment of the present application may correspond to the terminal device in the method embodiment of the present application, and the above and other operations and / or functions of each unit in the terminal device 300 are respectively to implement Figure 3 For the sake of brevity, the corresponding process of the terminal device in the method 200 is not repeated here.

[0185] Figure 5 FIG. 4 shows a schematic block diagram of a network device 400 according to an embodiment of the present application. Figure 5 As shown, the network device 400 includes:

[0186] The communication unit 410 is used to send a timing advance TA to a terminal device during a random access process, wherein the TA is used by the terminal device to send a sounding reference signal SRS, and the terminal device is in an idle state, or the terminal device is in a deactivated state.

[0187] Optionally, the communication unit 410 is specifically configured to:

[0188] Receiving first random access information sent by the terminal device, where the first random access information includes request information, where the request information is used to request to update the TA, and / or where the request information is used to request to return to an idle state or a deactivated state;

[0189] Send second random access information to the terminal device, where the second random access information includes the TA.

[0190] Optionally, the communication unit 410 is specifically configured to:

[0191] Receiving first random access information sent by the terminal device according to a first random access resource, where the first random access resource is used by the terminal device to initiate a random access process for updating the TA in an idle state or a deactivated state;

[0192] Send second random access information to the terminal device, where the second random access information includes the TA.

[0193] Optionally, the first random access resource is valid during the running of the first timer.

[0194] Optionally, the start or restart condition of the first timer includes at least one of the following:

[0195] The terminal device enters an idle state or a deactivated state;

[0196] The terminal device receives configuration information for the first timer;

[0197] The terminal device receives configuration information for the first random access resource;

[0198] The terminal device receives indication information for updating the configuration of the first timer.

[0199] Optionally, the communication unit 410 is further used to send first configuration information to the terminal device, where the first configuration information is used to configure the first random access resource and / or the first timer.

[0200] Optionally, the communication unit 410 is specifically configured to:

[0201] When the terminal device is in a connected state, the first configuration information is sent to the terminal device.

[0202] Optionally, the first configuration information is carried in RRC release information.

[0203] Optionally, the first random access resource is a resource exclusive to the terminal device.

[0204] Optionally, the first random access resource includes at least one of the following:

[0205] Random access preamble, time and frequency resources.

[0206] Optionally, the first random access resource is a contention-free random access CFRA resource.

[0207] Optionally, the first random access resource is a target random access preamble code, or the first random access resource is a target random access time-frequency resource.

[0208] Optionally, the first random access resource is pre-configured or agreed upon by a protocol, or the first random access resource is configured by the network device.

[0209] Optionally, the first random access resource is a contention-based random access CBRA resource.

[0210] Optionally, the second random access information includes indication information, and the indication information is used to instruct the terminal device to return to an idle state or a deactivated state.

[0211] Optionally, the second random access information does not include at least one of the following information:

[0212] Uplink resource authorization, uplink resource configuration, downlink data, configuration information.

[0213] Optionally, the network device 400 further includes: a processing unit 420,

[0214] The processing unit 420 is configured to not expect the terminal device to enter a connected state.

[0215] Optionally, the first random access information is the first piece of information in a four-step random access, and the second random access information is the second piece of information in a four-step random access; or,

[0216] The first random access information is the first piece of information in a four-step random access, and the second random access information is the fourth piece of information in the four-step random access; or,

[0217] The first random access information is the third piece of information in the four-step random access, and the second random access information is the fourth piece of information in the four-step random access; or,

[0218] The first random access information is the first piece of information in the two-step random access, and the second random access information is the second piece of information in the two-step random access.

[0219] Optionally, in some embodiments, the communication unit may be a communication interface or a transceiver, or an input / output interface of a communication chip or a system on chip. The processing unit may be one or more processors.

[0220] It should be understood that the network device 400 according to the embodiment of the present application may correspond to the network device in the method embodiment of the present application, and the above and other operations and / or functions of each unit in the network device 400 are respectively to implement Figure 3 For the sake of brevity, the corresponding processes of the network device in the method 200 are not described in detail here.

[0221] Figure 6 It is a schematic structural diagram of a communication device 500 provided in an embodiment of the present application. Figure 6 The communication device 500 shown includes a processor 510, and the processor 510 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0222] Alternatively, if Figure 6 As shown, the communication device 500 may further include a memory 520. The processor 510 may call and run a computer program from the memory 520 to implement the method in the embodiment of the present application.

[0223] The memory 520 may be a separate device independent of the processor 510 , or may be integrated into the processor 510 .

[0224] Alternatively, if Figure 6 As shown, the communication device 500 may further include a transceiver 530, and the processor 510 may control the transceiver 530 to communicate with other devices, specifically, may send information or data to other devices, or receive information or data sent by other devices.

[0225] The transceiver 530 may include a transmitter and a receiver. The transceiver 530 may further include an antenna, and the number of the antennas may be one or more.

[0226] Optionally, the communication device 500 may specifically be a network device in an embodiment of the present application, and the communication device 500 may implement corresponding processes implemented by the network device in each method in the embodiment of the present application, which will not be described in detail here for the sake of brevity.

[0227] Optionally, the communication device 500 may specifically be a mobile terminal / terminal device of an embodiment of the present application, and the communication device 500 may implement the corresponding processes implemented by the mobile terminal / terminal device in each method of the embodiment of the present application, which will not be described in detail here for the sake of brevity.

[0228] Figure 7 It is a schematic structural diagram of the device of an embodiment of the present application. Figure 7 The device 600 shown includes a processor 610, which can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0229] Alternatively, if Figure 7 As shown, the apparatus 600 may further include a memory 620. The processor 610 may call and run a computer program from the memory 620 to implement the method in the embodiment of the present application.

[0230] The memory 620 may be a separate device independent of the processor 610 , or may be integrated into the processor 610 .

[0231] Optionally, the apparatus 600 may further include an input interface 630. The processor 610 may control the input interface 630 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.

[0232] Optionally, the apparatus 600 may further include an output interface 640. The processor 610 may control the output interface 640 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

[0233] Optionally, the device can be applied to the network equipment in the embodiments of the present application, and the device can implement the corresponding processes implemented by the network equipment in the various methods in the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0234] Optionally, the apparatus may be applied to a mobile terminal / terminal device in an embodiment of the present application, and the apparatus may implement corresponding processes implemented by the mobile terminal / terminal device in each method of the embodiment of the present application, which will not be described in detail here for the sake of brevity.

[0235] Optionally, the device mentioned in the embodiments of the present application may also be a chip, for example, a system-on-chip, a system-on-chip, a chip system, or a system-on-chip chip.

[0236] Figure 8 is a schematic block diagram of a communication system 700 provided in an embodiment of the present application. Figure 8 As shown, the communication system 700 includes a terminal device 710 and a network device 720 .

[0237] Among them, the terminal device 710 can be used to implement the corresponding functions implemented by the terminal device in the above method, and the network device 720 can be used to implement the corresponding functions implemented by the network device in the above method. For the sake of brevity, they are not repeated here.

[0238] It should be understood that the processor of the embodiment of the present application may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method embodiment can be completed by the hardware integrated logic circuit or software instructions in the processor. The above processor can be a general processor, a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor. The steps of the method disclosed in the embodiment of the present application can be directly embodied as a hardware decoding processor to perform, or the hardware and software modules in the decoding processor are combined and performed. The software module can be located in a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, and other mature storage media in the art. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0239] It can be understood that the memory in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as 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 RAM bus random access memory (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0240] It should be understood that the above-mentioned memory is exemplary but not restrictive. For example, the memory in the embodiments of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM), etc. That is to say, the memory in the embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.

[0241] An embodiment of the present application also provides a computer-readable storage medium for storing a computer program.

[0242] Optionally, the computer-readable storage medium can be applied to the network device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0243] Optionally, the computer-readable storage medium can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0244] An embodiment of the present application also provides a computer program product, including computer program instructions.

[0245] Optionally, the computer program product can be applied to the network device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0246] Optionally, the computer program product can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0247] The embodiment of the present application also provides a computer program.

[0248] Optionally, the computer program can be applied to the network device in the embodiments of the present application. When the computer program runs on a computer, the computer executes the corresponding processes implemented by the network device in the various methods in the embodiments of the present application. For the sake of brevity, they are not described here.

[0249] Optionally, the computer program can be applied to the mobile terminal / terminal device in the embodiments of the present application. When the computer program runs on the computer, the computer executes the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0250] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example 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 performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0251] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0252] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0253] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0254] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0255] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. In view of such an understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0256] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A wireless communication method, characterized in that: include: The terminal device receives the timing advance TA during the random access process; The terminal device sends a sounding reference signal SRS according to the TA; The terminal device is in an idle state, or the terminal device is in a deactivated state; The terminal device receives the TA during the random access process, including: The terminal device sends first random access information, where the first random access information includes request information, where the request information is used to request to update the TA, and the request information is used to request to return to an idle state or a deactivated state; The terminal device receives second random access information, where the second random access information includes the TA; Alternatively, the terminal device receives the TA during the random access process, including: The terminal device sends first random access information according to a first random access resource, where the first random access resource is used by the terminal device to initiate a random access process for updating the TA in an idle state or a deactivated state; The terminal device receives second random access information, where the second random access information includes the TA.

2. The method according to claim 1, characterized in that The first random access resource is valid during a period when a first timer runs.

3. The method according to claim 2, characterized in that The start or restart condition of the first timer includes at least one of the following: The terminal device enters an idle state or a deactivated state; The terminal device receives configuration information for the first timer; The terminal device receives configuration information for the first random access resource; The terminal device receives indication information for updating the configuration of the first timer.

4. The method according to claim 2, characterized in that The method further comprises: The terminal device receives first configuration information, where the first configuration information is used to configure the first random access resource and / or the first timer.

5. The method according to claim 4, characterized in that The terminal device receives first configuration information, including: When the terminal device is in a connected state, the terminal device receives the first configuration information.

6. The method according to claim 4, characterized in that The first configuration information is carried in radio resource control RRC release information.

7. The method according to claim 2, characterized in that The first random access resource is a resource exclusive to the terminal device.

8. The method according to claim 2, characterized in that The first random access resource includes at least one of the following: Random access preamble, time and frequency resources.

9. The method according to claim 2, characterized in that The first random access resource is a contention-free random access CFRA resource.

10. The method according to claim 1, characterized in that The first random access resource is a target random access preamble code, or the first random access resource is a target random access time-frequency resource.

11. The method according to claim 10, characterized in that The first random access resource is pre-configured or agreed upon by a protocol, or the first random access resource is configured by a network device.

12. The method according to claim 10, characterized in that The first random access resource is a contention-based random access CBRA resource.

13. The method according to any one of claims 1 to 12, characterized in that The second random access information includes indication information, and the indication information is used to instruct the terminal device to return to an idle state or a deactivated state.

14. The method according to any one of claims 1 to 12, characterized in that The second random access information does not include at least one of the following information: Uplink resource authorization, uplink resource configuration, downlink data, configuration information.

15. The method according to any one of claims 1 to 12, characterized in that The method further comprises: After receiving the second random access information, the terminal device ignores entering the connected state.

16. The method according to any one of claims 1 to 12, characterized in that The first random access information is the first piece of information in a four-step random access, and the second random access information is the second piece of information in a four-step random access; or, The first random access information is the first piece of information in the four-step random access, and the second random access information is the fourth piece of information in the four-step random access; or, The first random access information is the third piece of information in the four-step random access, and the second random access information is the fourth piece of information in the four-step random access; or, The first random access information is the first piece of information in two-step random access, and the second random access information is the second piece of information in the two-step random access.

17. A wireless communication method, characterized in that: include: The network device sends a timing advance TA to the terminal device during a random access process, wherein the TA is used by the terminal device to send a sounding reference signal SRS, and the terminal device is in an idle state, or the terminal device is in a deactivated state; The network device sends a TA to the terminal device during the random access process, including: The network device receives first random access information sent by the terminal device, where the first random access information includes request information, where the request information is used to request to update the TA, and the request information is used to request to return to an idle state or a deactivated state; The network device sends second random access information to the terminal device, where the second random access information includes the TA; Alternatively, the network device sends the TA to the terminal device during the random access process, including: The network device receives first random access information sent by the terminal device according to a first random access resource, where the first random access resource is used by the terminal device to initiate a random access process for updating the TA in an idle state or a deactivated state; The network device sends second random access information to the terminal device, where the second random access information includes the TA.

18. The method according to claim 17, characterized in that The first random access resource is valid during a period when a first timer runs.

19. The method according to claim 18, characterized in that The start or restart condition of the first timer includes at least one of the following: The terminal device enters an idle state or a deactivated state; The terminal device receives configuration information for the first timer; The terminal device receives configuration information for the first random access resource; The terminal device receives indication information for updating the configuration of the first timer.

20. The method of claim 18, wherein: The method further comprises: The network device sends first configuration information to the terminal device, where the first configuration information is used to configure the first random access resource and / or the first timer.

21. The method of claim 20, wherein: The network device sends first configuration information to the terminal device, including: When the terminal device is in a connected state, the network device sends the first configuration information to the terminal device.

22. The method of claim 20, wherein: The first configuration information is carried in radio resource control RRC release information.

23. The method of claim 18, wherein: The first random access resource is a resource exclusive to the terminal device.

24. The method of claim 18, wherein: The first random access resource includes at least one of the following: Random access preamble, time and frequency resources.

25. The method of claim 18, wherein: The first random access resource is a contention-free random access CFRA resource.

26. The method of claim 17, wherein: The first random access resource is a target random access preamble code, or the first random access resource is a target random access time-frequency resource.

27. The method of claim 26, wherein: The first random access resource is pre-configured or agreed upon by a protocol, or the first random access resource is configured by the network device.

28. The method of claim 26, wherein: The first random access resource is a contention-based random access CBRA resource.

29. The method according to any one of claims 17 to 28, characterized in that The second random access information includes indication information, and the indication information is used to instruct the terminal device to return to an idle state or a deactivated state.

30. The method according to any one of claims 17 to 28, characterized in that The second random access information does not include at least one of the following information: Uplink resource authorization, uplink resource configuration, downlink data, configuration information.

31. The method according to any one of claims 17 to 28, characterized in that The method further comprises: The network device does not expect the terminal device to enter a connected state.

32. The method according to any one of claims 17 to 28, characterized in that The first random access information is the first piece of information in a four-step random access, and the second random access information is the second piece of information in a four-step random access; or, The first random access information is the first piece of information in the four-step random access, and the second random access information is the fourth piece of information in the four-step random access; or, The first random access information is the third piece of information in the four-step random access, and the second random access information is the fourth piece of information in the four-step random access; or, The first random access information is the first piece of information in two-step random access, and the second random access information is the second piece of information in the two-step random access.

33. A terminal device, characterized in that: include: A communication unit, configured to receive a timing advance TA during a random access process; The communication unit is further configured to send a sounding reference signal SRS according to the TA; The terminal device is in an idle state, or the terminal device is in a deactivated state; Wherein, the communication unit is specifically used for: Sending first random access information, where the first random access information includes request information, where the request information is used to request to update the TA, and the request information is used to request to return to an idle state or a deactivated state; receiving second random access information, where the second random access information includes the TA; Alternatively, the communication unit is specifically used for: Sending first random access information according to a first random access resource, where the first random access resource is used by the terminal device to initiate a random access process for updating the TA in an idle state or a deactivated state; Second random access information is received, where the second random access information includes the TA.

34. The terminal device according to claim 33, characterized in that: The first random access resource is valid during a period when a first timer runs.

35. The terminal device according to claim 34, characterized in that: The start or restart condition of the first timer includes at least one of the following: The terminal device enters an idle state or a deactivated state; The terminal device receives configuration information for the first timer; The terminal device receives configuration information for the first random access resource; The terminal device receives indication information for updating the configuration of the first timer.

36. The terminal device according to claim 34, characterized in that: The communication unit is further used to receive first configuration information, where the first configuration information is used to configure the first random access resource and / or the first timer.

37. The terminal device according to claim 36, characterized in that: The communication unit is specifically used for: When the terminal device is in a connected state, the first configuration information is received.

38. The terminal device according to claim 36, characterized in that: The first configuration information is carried in radio resource control RRC release information.

39. The terminal device according to claim 34, characterized in that: The first random access resource is a resource exclusive to the terminal device.

40. The terminal device according to claim 34, characterized in that: The first random access resource includes at least one of the following: Random access preamble, time and frequency resources.

41. The terminal device according to claim 34, characterized in that: The first random access resource is a contention-free random access CFRA resource.

42. The terminal device according to claim 33, characterized in that: The first random access resource is a target random access preamble code, or the first random access resource is a target random access time-frequency resource.

43. The terminal device according to claim 42, characterized in that: The first random access resource is pre-configured or agreed upon by a protocol, or the first random access resource is configured by a network device.

44. The terminal device according to claim 42, characterized in that The first random access resource is a contention-based random access CBRA resource.

45. The terminal device according to any one of claims 33 to 44, characterized in that: The second random access information includes indication information, and the indication information is used to instruct the terminal device to return to an idle state or a deactivated state.

46. ​​The terminal device according to any one of claims 33 to 44, characterized in that: The second random access information does not include at least one of the following information: Uplink resource authorization, uplink resource configuration, downlink data, configuration information.

47. The terminal device according to any one of claims 33 to 44, characterized in that: The terminal device further includes: a processing unit, After receiving the second random access information, the processing unit is configured to ignore entering a connected state.

48. The terminal device according to any one of claims 33 to 44, characterized in that: The first random access information is the first piece of information in a four-step random access, and the second random access information is the second piece of information in a four-step random access; or, The first random access information is the first piece of information in the four-step random access, and the second random access information is the fourth piece of information in the four-step random access; or, The first random access information is the third piece of information in the four-step random access, and the second random access information is the fourth piece of information in the four-step random access; or, The first random access information is the first piece of information in two-step random access, and the second random access information is the second piece of information in the two-step random access.

49. A network device, characterized in that: include: A communication unit, configured to send a timing advance TA to a terminal device during a random access process, wherein the TA is used by the terminal device to send a sounding reference signal SRS, the terminal device is in an idle state, or the terminal device is in a deactivated state; Wherein, the communication unit is specifically used for: receiving first random access information sent by the terminal device, where the first random access information includes request information, where the request information is used to request to update the TA, and the request information is used to request to return to an idle state or a deactivated state; Sending second random access information to the terminal device, where the second random access information includes the TA; Alternatively, the communication unit is specifically used for: Receiving first random access information sent by the terminal device according to a first random access resource, where the first random access resource is used by the terminal device to initiate a random access process for updating the TA in an idle state or a deactivated state; Send second random access information to the terminal device, where the second random access information includes the TA.

50. The network device according to claim 49, characterized in that The first random access resource is valid during a period when a first timer runs.

51. The network device according to claim 50, characterized in that The start or restart condition of the first timer includes at least one of the following: The terminal device enters an idle state or a deactivated state; The terminal device receives configuration information for the first timer; The terminal device receives configuration information for the first random access resource; The terminal device receives indication information for updating the configuration of the first timer.

52. The network device according to claim 50, characterized in that The communication unit is further used to send first configuration information to the terminal device, where the first configuration information is used to configure the first random access resource and / or the first timer.

53. The network device according to claim 52, characterized in that The communication unit is specifically used for: When the terminal device is in a connected state, the first configuration information is sent to the terminal device.

54. The network device according to claim 52, characterized in that The first configuration information is carried in radio resource control RRC release information.

55. The network device according to claim 50, characterized in that The first random access resource is a resource exclusive to the terminal device.

56. The network device according to claim 50, characterized in that The first random access resource includes at least one of the following: Random access preamble, time and frequency resources.

57. The network device according to claim 50, characterized in that The first random access resource is a contention-free random access CFRA resource.

58. The network device according to claim 49, characterized in that The first random access resource is a target random access preamble code, or the first random access resource is a target random access time-frequency resource.

59. The network device according to claim 58, characterized in that The first random access resource is pre-configured or agreed upon by a protocol, or the first random access resource is configured by the network device.

60. The network device according to claim 58, characterized in that The first random access resource is a contention-based random access CBRA resource.

61. The network device according to any one of claims 49 to 60, characterized in that: The second random access information includes indication information, and the indication information is used to instruct the terminal device to return to an idle state or a deactivated state.

62. The network device according to any one of claims 49 to 60, characterized in that: The second random access information does not include at least one of the following information: Uplink resource authorization, uplink resource configuration, downlink data, configuration information.

63. The network device according to any one of claims 49 to 60, characterized in that: The network device further includes: a processing unit, The processing unit is used for not expecting the terminal device to enter a connected state.

64. The network device according to any one of claims 49 to 60, characterized in that: The first random access information is the first piece of information in a four-step random access, and the second random access information is the second piece of information in a four-step random access; or, The first random access information is the first piece of information in the four-step random access, and the second random access information is the fourth piece of information in the four-step random access; or, The first random access information is the third piece of information in the four-step random access, and the second random access information is the fourth piece of information in the four-step random access; or, The first random access information is the first piece of information in two-step random access, and the second random access information is the second piece of information in the two-step random access.

65. 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 call and run the computer program stored in the memory to execute the method according to any one of claims 1 to 16.

66. 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 call and run the computer program stored in the memory to execute the method as claimed in any one of claims 17 to 32.

67. A chip, characterized in that: include: A processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes a method as claimed in any one of claims 1 to 16.

68. A chip, characterized in that: It comprises: a processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes a method as claimed in any one of claims 17 to 32.

69. A computer-readable storage medium, characterized in that Used to store a computer program, wherein the computer program causes a computer to execute the method according to any one of claims 1 to 16.

70. A computer-readable storage medium, characterized in that Used to store a computer program, the computer program causing a computer to execute the method according to any one of claims 17 to 32.

71. A computer program product, characterized in that The method comprises computer program instructions which cause a computer to execute the method as claimed in any one of claims 1 to 16.

72. A computer program product, characterized in that Comprising computer program instructions causing a computer to perform the method as claimed in any one of claims 17 to 32.

Images