WO2023207554A1 - 一种定时提前量的获取方法及装置 - Google Patents

一种定时提前量的获取方法及装置 Download PDF

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Publication number
WO2023207554A1
WO2023207554A1 PCT/CN2023/086981 CN2023086981W WO2023207554A1 WO 2023207554 A1 WO2023207554 A1 WO 2023207554A1 CN 2023086981 W CN2023086981 W CN 2023086981W WO 2023207554 A1 WO2023207554 A1 WO 2023207554A1
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WIPO (PCT)
Prior art keywords
cell
information
random access
terminal device
ssb
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PCT/CN2023/086981
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English (en)
French (fr)
Inventor
樊波
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华为技术有限公司
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Publication of WO2023207554A1 publication Critical patent/WO2023207554A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
    • H04W56/0045—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by altering transmission time
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access

Definitions

  • the present application relates to the field of communication technology, and in particular to a method and device for obtaining timing advance (TA).
  • TA timing advance
  • uplink and downlink transmission use time slots as the basic time unit, that is, data is transmitted once in each time slot.
  • the starting time of the time slot of network equipment is fixed, and the uplink and downlink time slots are aligned.
  • the starting time of the uplink and downlink time slots of the terminal device needs to be determined based on the starting time of the time slot of the network device and the propagation time between the network device and the terminal device. Assume that the signal propagation time between the network device and the terminal device is T, and the current starting time of the uplink time slot of the terminal device is 2T earlier than the starting time of its downlink time slot.
  • the time difference i.e.
  • the terminal equipment determines the starting time of its downlink time slot by measuring the downlink pilot signal, and receives the downlink signal based on the starting time of the downlink time slot.
  • the terminal equipment needs to determine the TA, and determine the uplink time slot starting time (ie, the downlink time slot starting time - TA) based on the TA and the downlink time slot starting time, so as to transmit the uplink signal.
  • TA is a cell-level parameter, and each cell has a corresponding TA value.
  • Network equipment can transmit data with terminal equipment through one or more cells. These cells can be divided into two types: serving cells and non-serving cells. However, currently the terminal equipment can only determine the TA of the serving cell, and there is no way to obtain the TA of the non-serving cell. This causes the terminal equipment to be unable to accurately perform uplink transmission in the non-serving cell.
  • This application provides a method and device for obtaining TA, so that the terminal equipment can obtain the TA of the non-serving cell, so as to accurately perform uplink transmission in the non-serving cell.
  • this application provides a method for obtaining TA, which can be applied to terminal equipment, or components (such as processors, chips, circuits, etc.) configured in the terminal equipment, or software modules.
  • the method may include: after receiving the first information from the network device, the terminal device sends a random access preamble corresponding to the first cell to the network device according to the first information, and obtains the random access preamble from the network device.
  • the network device receives a random access response message, where the random access response message includes a first TA corresponding to the first cell; wherein the first information may be used to instruct the terminal device to perform a search of the first cell.
  • the first cell is a non-serving cell of the terminal device.
  • the first information may include one or more of the following: the identity of the first cell, The synchronization signal broadcast channel measurement resource block (synchronization signal and (physical broadcast channel, PBCH) block, SSB) identification corresponding to the first cell, the identification of the random access preamble, the random access opportunity indication or the random access Mask ID.
  • the terminal device can determine the corresponding random access preamble and the SSB and random access opportunity for sending the random access preamble, so that the terminal device successfully sends the corresponding random access preamble of the first cell. random access preamble.
  • the terminal device may receive configuration information of the first cell from the network device, and the configuration information may Including one or more of the following: the identity of the first cell, the SSB information corresponding to the first cell, and the random access information of the first cell; for example, the SSB information corresponding to the first cell may include One or more of the following: SSB set, SSB period or SSB transmission power; for example, the random access information of the first cell may include one or more of the following: random access preamble information, random access The association between opportunity information or SSB and random access opportunities.
  • the terminal device can accurately determine the corresponding random access preamble and the SSB and random access opportunity for sending the random access preamble by combining the first information and the configuration information, so that the terminal device successfully sends The random access preamble corresponding to the first cell.
  • the terminal device may send the random access preamble corresponding to the first cell to the network device according to the first information through the following method: the terminal device may send the random access preamble corresponding to the first cell according to the first information: Send the random access preamble corresponding to the first cell to the network device with the configuration information.
  • the terminal device can accurately determine the corresponding random access preamble and the SSB and random access opportunity for sending the random access preamble by combining the first information and the configuration information, so that the terminal device successfully sends the The random access preamble corresponding to the first cell.
  • the terminal device may send the random access preamble corresponding to the first cell to the network device according to the first information and the configuration information through the following method: the terminal device sends the random access preamble corresponding to the first cell according to the following method: The first information and the configuration information determine a first SSB; and the terminal device determines a first random access opportunity based on the first information, the configuration information and the first SSB; furthermore, the terminal The device may send the random access preamble corresponding to the first cell to the network device according to the first SSB and the first random access opportunity. In this way, the terminal device can accurately determine the SSB and random access opportunity for sending the random access preamble, thereby successfully sending the random access preamble corresponding to the first cell.
  • the terminal device may determine the first SSB based on the first information and the configuration information through the following method: the terminal device may determine the first SSB based on the first information included in the first information.
  • the first SSB is determined by the identity of a cell, the identity of the SSB corresponding to the first cell, and the SSB set of the first cell included in the configuration information. In this way, the terminal device can accurately determine the SSB corresponding to the access preamble to be sent.
  • the terminal device determines the first random access opportunity based on the first information, the configuration information and the first SSB, which can be implemented by the following method: the terminal device can determine the first random access opportunity based on the The first SSB, the association between the SSB of the first cell and the random access opportunity included in the configuration information, and the random access mask identifier included in the first information determine the first random access opportunity. Enter opportunities. In this way, the terminal device can accurately determine the random access opportunity corresponding to the access preamble to be sent.
  • the terminal device determines that the transmission of the first uplink signal uses the TA corresponding to the first cell; then, the terminal device sends the third signal in the first cell according to the first TA. An uplink signal. In this way, after the terminal device obtains the first TA of the first cell, it needs to use the TA corresponding to the first cell.
  • the terminal equipment can accurately transmit the uplink signals of the first cell.
  • the terminal device may determine that the transmission of the first uplink signal uses the TA corresponding to the first cell in the following manner: the control resource set group identifier corresponding to the first uplink signal is equal to the first value, the terminal device determines that the transmission of the first uplink signal uses the TA corresponding to the first cell; or, the transmission configuration indicator state (TCI-state) corresponding to the first uplink signal
  • TCI-state transmission configuration indicator state
  • the terminal device determines that the transmission of the first uplink signal uses the TA corresponding to the first cell.
  • the terminal device can flexibly determine to use the TA corresponding to the first cell for transmission of the first uplink signal through the above multiple methods, thereby accurately transmitting the uplink signal of the first cell.
  • the terminal device receives second information from the network device, and the second information is used to indicate the TA change amount of the first cell.
  • the terminal device can update the TA corresponding to the first cell according to the TA change amount of the first cell, so that the terminal device uses the accurate TA of the first cell for uplink transmission.
  • the second information is used to indicate the TA change amount of the first cell, which can be implemented by the following method: if the timing advance group (TA group, TAG) identifier in the second information is the first TAG identifier, then the TA change amount indicated by the second information is the TA change amount of the first cell; or, if the logical channel ID (logical channel ID, LCID) corresponding to the second information is the an LCID, then the TA change amount indicated by the second information is the TA change amount of the first cell; or, if the group identifier of the control resource set corresponding to the second information is equal to the second value, then the third The TA change amount indicated by the second information is the TA change amount of the first cell; or, if the cell identity in the second information is the identity of the first cell, then the TA change amount indicated by the second information is the TA change amount of the first cell.
  • the indication of the TA change amount of the first cell by the second information can be flexibly implemented in a variety of ways, so that the terminal device updates the TA corresponding to the first cell according to the TA change amount of the first cell, thereby allowing the terminal device to update the TA corresponding to the first cell according to the TA change amount of the first cell.
  • the device uses the accurate TA of the first cell for uplink transmission.
  • the first TAG identifier may be a TAG identifier of a non-serving cell defined by the protocol; or the first TAG identifier may also be a TAG identifier configured by the network device for a non-serving cell.
  • the first information includes a first field, the first field is used to select a non-serving cell from a plurality of configured non-serving cells, or the first field is used to select a non-serving cell from the configured Select a cell from multiple non-serving cells and the cell that sends the first information.
  • the non-serving cell is the first cell.
  • the first information includes a second field, and the second field is used to select a cell from a cell that sends the first information and a currently activated non-serving cell.
  • the currently activated non-serving cell is the first cell.
  • the first information when one or a combination of more of the following conditions is met, includes the first field or the second field:
  • the network device configures a non-serving cell for the terminal device
  • the network device configures two control resource sets CORESET groups for the terminal device
  • the network device is configured with the first field or the second field exists
  • the network device configures the terminal device to adopt cell switching based on low-layer signaling.
  • this application provides a method for obtaining TA, which can be applied to network equipment, or Components (such as processors, chips, circuits or others) configured in network equipment, or software modules.
  • the method may include: after the network device sends the first information to the terminal device, receiving the random access preamble corresponding to the first cell from the terminal device, and based on the random access preamble Determine the first TA of the first cell, and then send a random access response message to the terminal device, where the random access response message contains the first TA; wherein the first information is used to indicate the The terminal device performs random access to a first cell, and the first cell is a non-serving cell of the terminal device.
  • the terminal device can obtain the TA of the non-serving cell, thereby accurately performing uplink transmission in the non-serving cell.
  • the first information may include one or more of the following: the identity of the first cell, the synchronization signal broadcast channel measurement resource block SSB identity corresponding to the first cell, the random access Input preamble identifier, random access opportunity indication or random access mask identifier.
  • the terminal device can determine the corresponding random access preamble and the SSB and random access opportunity to send the random access preamble, so that the terminal device successfully sends the first cell The corresponding random access preamble.
  • the network device may send the configuration information of the first cell to the terminal device, and the configuration information may include the following One or more items: the identity of the first cell, the synchronization signal broadcast channel measurement resource block SSB information corresponding to the first cell, and the random access information of the first cell; for example, the first cell corresponds to
  • the SSB information may include one or more of the following: SSB set, SSB period or SSB transmission power; for example, the random access information of the first cell may include one or more of the following: random access preamble Information, random access opportunity information, or the association between SSB and random access opportunities.
  • the terminal device can accurately determine the corresponding random access preamble and the SSB and random access opportunity for sending the random access preamble by combining the first information and the configuration information, so that the terminal device successfully sends The random access preamble corresponding to the first cell.
  • the network device may receive the first uplink signal in the first cell according to the first TA, and the first uplink signal is transmitted using the TA corresponding to the first cell. In this way, the network device can receive accurate uplink transmission of the first cell.
  • the transmission of the first uplink signal uses the TA corresponding to the first cell; or, the first When the cell identity included in the transmission configuration number state TCI-state corresponding to the uplink signal is the identity of the first cell, the transmission of the first uplink signal uses the TA corresponding to the first cell. In this way, the transmission of the first uplink signal using the TA corresponding to the first cell can be flexibly determined through the above-mentioned multiple methods.
  • the network device after determining the TA change amount of the first cell, the network device sends second information to the terminal device, where the second information is used to indicate the TA change amount of the first cell. .
  • the terminal device can update the TA corresponding to the first cell according to the TA change amount of the first cell, so that the terminal device uses the accurate TA of the first cell for uplink transmission.
  • the second information is used to indicate the TA change amount of the first cell, which can be achieved by the following method: if the timing advance group TAG identifier in the second information is the first TAG identifier , then the TA change amount indicated by the second information is the TA change amount of the first cell; or, if the logical channel identifier LCID corresponding to the second information is the first LCID, then the TA change amount indicated by the second information The TA change amount is the TA change amount of the first cell; or, if the group identifier of the control resource set corresponding to the second information is equal to the second value, the TA change amount indicated by the second information is the TA change amount of the first cell.
  • the TA change amount of a cell or, if the cell identity in the second information is the identity of the first cell, the TA change amount indicated by the second information is the TA change amount of the first cell.
  • TA change amount the indication of the TA change amount of the first cell by the second information can be flexibly implemented in a variety of ways, so that the terminal device updates the TA corresponding to the first cell according to the TA change amount of the first cell, thereby allowing the terminal device to update the TA corresponding to the first cell according to the TA change amount of the first cell.
  • the device uses the accurate TA of the first cell for uplink transmission.
  • the first TAG identifier is a TAG identifier of a non-serving cell defined by the protocol; or, the first TAG identifier is a TAG identifier configured by the network device for a non-serving cell.
  • the first information includes a first field, the first field is used to select a non-serving cell from a plurality of configured non-serving cells, or the first field is used to select a non-serving cell from the configured Select a cell from multiple non-serving cells and the cell that sends the first information.
  • the non-serving cell is the first cell.
  • the first information includes a second field, and the second field is used to select a cell from a cell that sends the first information and a currently activated non-serving cell.
  • the currently activated non-serving cell is the first cell.
  • the first information when one or a combination of more of the following conditions is met, includes the first field or the second field:
  • the network device configures a non-serving cell for the terminal device
  • the network device configures two control resource sets CORESET groups for the terminal device
  • the network device is configured with the first field or the second field exists
  • the network device configures the terminal device to adopt cell switching based on low-layer signaling.
  • the present application also provides a communication device, which may be a terminal device.
  • the communication device has the function of implementing the method in the above-mentioned first aspect or each possible design example of the first aspect.
  • the functions described can be implemented by hardware, or can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the structure of the communication device may include a transceiver unit and a processing unit. These units may perform the corresponding functions in the above-mentioned first aspect or each possible design example of the first aspect. For details, see the method examples. The detailed description will not be repeated here.
  • the structure of the communication device includes a transceiver and a processor, and optionally a memory.
  • the transceiver is used to send and receive data, messages or information, etc., and to communicate with other devices in the communication system.
  • the device performs communication interaction
  • the processor is configured to support the communication device to perform corresponding functions in the above-mentioned first aspect or each possible design example of the first aspect.
  • the memory is coupled to the processor and holds program instructions and data necessary for the communications device.
  • the present application also provides a communication device, which may be a network device.
  • the communication device has the function of implementing the method in the above-mentioned second aspect or each possible design example of the second aspect.
  • the functions described can be implemented by hardware, or can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the structure of the communication device may include a transceiver unit and a processing unit. These units may perform the corresponding functions in the above second aspect or each possible design example of the second aspect. For details, see the method examples. The detailed description will not be repeated here.
  • the structure of the communication device includes a transceiver and a processor, and optionally a memory
  • the transceiver is used to send and receive data, messages or information, etc., and to communicate and interact with other devices in the communication system.
  • the processor is configured to support the communication device to perform the above second aspect or the second aspect. The corresponding functionality in each possible design example of the aspect.
  • the memory is coupled to the processor and holds program instructions and data necessary for the communications device.
  • embodiments of the present application provide a communication system, which may include the above-mentioned terminal equipment and network equipment.
  • embodiments of the present application provide a computer-readable storage medium.
  • the computer-readable storage medium stores program instructions. When the program instructions are run on a computer, they cause the computer to execute the first aspect of the embodiments of the application and its contents. Any possible design, or the method described in the second aspect and any possible design thereof.
  • computer-readable storage media can be any available media that can be accessed by a computer.
  • computer-readable media may include non-transitory computer-readable media, random-access memory (random-access memory, RAM), read-only memory (read-only memory, ROM), electrically erasable memory
  • RAM random-access memory
  • ROM read-only memory
  • programmable read-only memory electrically EPROM, EEPROM
  • CD-ROM or other optical disk storage magnetic disk storage media or other magnetic storage devices, or can be used to carry or store the desired program code in the form of instructions or data structures and can Any other media accessed by a computer.
  • embodiments of the present application provide a computer program product, which includes instructions.
  • the instructions When the instructions are run on a computer, the above-mentioned first aspect or any possible design of the first aspect, or the second aspect or The method described in any of the possible designs of the second aspect is carried out.
  • the present application also provides a chip, including a processor, the processor being coupled to a memory and configured to read and execute program instructions stored in the memory, so that the chip implements the above-mentioned first aspect Or in any possible design of the first aspect, the method described in the above second aspect or any possible design of the second aspect.
  • Figure 1 is a schematic diagram of the architecture of a communication system provided by this application.
  • FIG. 2 is a schematic diagram of a TA provided by this application.
  • Figure 3 is a schematic diagram of TA corresponding to cell 1 and cell 2 provided by this application;
  • FIG. 4 is a schematic diagram of a MAC CE format provided by this application.
  • Figure 5 is a schematic flow chart of a TA acquisition method provided by this application.
  • Figure 6 is a schematic diagram of the format of a random access response message provided by this application.
  • Figure 7 is a schematic structural diagram of a communication device provided by the present application.
  • Figure 8 is a schematic structural diagram of another communication device provided by the present application.
  • Figure 9 is a structural diagram of a communication device provided by this application.
  • Embodiments of the present application provide a method and device for obtaining TA, so that terminal equipment can obtain non-serving cells. TA to accurately perform uplink transmission in non-serving cells.
  • the method and the device described in this application are based on the same technical concept. Since the principles of solving problems by the method and the device are similar, the implementation of the device and the method can be referred to each other, and the repeated parts will not be repeated.
  • At least one (species, item) refers to one (species, item) or multiple (species, item), and multiple (species, item) refers to two (species, item) Or two or more (species, items).
  • At least one of the following" or similar expressions thereof refers to any combination of these items, including any combination of single or plural items.
  • at least one of a, b, or c can mean: a, b, c, a and b, a and c, b and c, or a, b and c, where a, b, c Can be single or multiple.
  • the communication system applicable to the embodiments of this application may include multiple network devices and one or more terminal devices.
  • FIG. 1 shows the architecture of a communication system applicable to the embodiment of the present application.
  • the architecture of the communication system includes multiple network devices and a terminal device. Three network devices are shown in Figure 1 (network device 1, network device 2 and network device 3 in Figure 1). In Figure 1, multiple network devices can transmit with one terminal device at the same time.
  • the network device can be a device with wireless transceiver function or a chip or chip system that can be installed on the network device.
  • the network device includes but is not limited to: base station (evolutional nodeB, eNB or eNodeB), base station (generation node B, gNB), macro base station, micro base station (also called small station), wireless network controller (radio network controller, RNC), node B (Node B, NB), base station controller (base station controller, BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved NodeB, or home Node B, HNB), baseband unit (baseband unit, BBU), access in wireless fidelity (wireless fidelity, Wi-Fi) system Access point (AP), wireless relay node, wireless backhaul node, transmission point (transmission and reception point, TRP or transmission point, TP), cloud radio access network (cloud radio access network, CRAN) scenario Wireless controllers, etc., can also be network nodes that constitute
  • gNB may include centralized units (CUs) and DUs.
  • the gNB may also include a radio unit (RU).
  • CU implements some functions of gNB
  • DU implements some functions of gNB.
  • CU implements radio resource control (RRC) and packet data convergence protocol (PDCP) layer functions
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • DU implements wireless chain Radio link control (RLC), media access control (media access control, MAC) and physical (physical, PHY) layer functions.
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • RLC wireless chain Radio link control
  • MAC media access control
  • PHY physical
  • the network device may be a CU node, a DU node, or a device including a CU node and a DU node.
  • the CU can be divided into network equipment in the access network RAN, or the CU can be divided into network equipment in the core network CN, without limitation.
  • Terminal equipment can also be called user equipment (UE), access terminal, subscriber unit (subscriber unit) unit), user station, mobile station (MS), mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent or user device.
  • the terminal device in the embodiment of the present application may be a mobile phone, a cellular phone, a smart phone, a wireless data card, a personal digital assistant (PDA) computer, a tablet computer ( Pad), computer with wireless transceiver function, wireless modem, handheld device (handset), laptop computer, machine type communication (MTC) terminal, virtual reality (VR) ) terminal equipment, augmented reality (AR) terminal equipment, wireless terminals in industrial control (industrial control), wireless terminals in self-driving (self driving), wireless terminals in remote medical (remote medical), smart Wireless terminals in smart grid, wireless terminals in transportation safety, wireless terminals in smart city, smart wearable devices (smart glasses, smart watches, smart headphones, etc.), smart homes ( Wireless terminals in smart homes, etc., may
  • the communication system shown in Figure 1 can be, but is not limited to, a fourth generation (4th Generation, 4G) system or a fifth generation (5th Generation, 5G) system, such as a new generation wireless access technology (new radio access technology).
  • 4G fourth generation
  • 5G fifth generation
  • the method of the embodiment of the present application is also applicable to various future communication systems, such as the sixth generation (6th Generation, 6G) system or other communication networks.
  • both uplink and downlink transmissions use time slots as the basic time unit, that is, data is transmitted once in each time slot.
  • the time slot starting time of the network device is fixed, and the uplink and downlink time slots are aligned.
  • the uplink and downlink time slot starting time of the terminal device needs to be based on the time slot starting time of the network device and the relationship between the network device and the terminal device. to determine the propagation time. As shown in Figure 2, since the signal propagation time between the network device and the terminal device is T, the signal sent by the network device at time t will not be received by the terminal device until t+T. Therefore, the downlink time slot of the terminal device The starting time is T later than the starting time of the downlink time slot of the network device.
  • the signal propagation time between the network device and the terminal device is T
  • the signal sent by the terminal device at time t-T will not be received until t on the network device side. Therefore, the starting time of the uplink time slot of the terminal device is longer than
  • the starting time of the uplink time slot of the network device is earlier than time T. Therefore, the starting time of the uplink time slot of the terminal equipment is 2T earlier than the starting time of its downlink time slot.
  • the time difference (i.e. 2T) between the starting time of the uplink time slot and the starting time of the downlink time slot is also called timing advance (timing advance, TA).
  • the terminal equipment determines the starting time of its downlink time slot by measuring the downlink pilot signal, and receives the downlink signal based on the starting time of the downlink time slot.
  • the terminal equipment needs to determine the TA, and determine the uplink time slot starting time (ie, the downlink time slot starting time - TA) based on the TA and the downlink time slot starting time, so as to transmit the uplink signal.
  • the acquisition of TA can be divided into two steps: initial TA acquisition and TA adjustment.
  • the acquisition of the initial TA is completed through the random access channel (RACH) process.
  • the terminal device sends a preamble signal to the network device.
  • the preamble signal is sent based on the downlink time slot. That is, the terminal device starts sending the preamble at the starting time of the downlink time slot of the terminal device. Since the starting time of the downlink time slot of the terminal device is later than the starting time of the downlink time slot of the network device, and it takes time T for the preamble to reach the network device, the time when the preamble is received is later than the starting time of the uplink time slot of the network device.
  • the starting time is 2T later, and the 2T is the TA of the terminal device.
  • the network device determines the TA by measuring the preamble and sends the determined TA to the terminal device, and the terminal device can determine the target corresponding TA value, and use this TA for transmission in subsequent uplink transmissions. As the terminal device moves, its TA value may change, so TA adjustment is also required.
  • the network device can determine the TA change amount of the terminal device through the uplink pilot signal sent by the terminal device, and send the TA change amount through medium access control-control element (MAC CE) signaling. To the terminal device, the terminal device uses the TA change amount to adjust the TA value it maintains, and then its TA value can be updated.
  • MAC CE medium access control-control element
  • TA is a cell-level parameter, and each cell has a corresponding TA value.
  • Network equipment can transmit data with terminal equipment through one or more cells. These cells can be divided into two types: serving cells and non-serving cells.
  • a serving cell refers to a cell configured for terminal equipment for carrier aggregation (CA), also called a carrier component (CC).
  • CA carrier aggregation
  • CC carrier component
  • the network equipment needs to configure the detailed parameters of the serving cell to the terminal equipment.
  • Non-serving cells refer to cells outside the serving cells.
  • the 5G protocol did not support the use of non-serving cells for data transmission for terminal devices. In R17, a mechanism for data transmission based on non-serving cells is introduced.
  • the network equipment does not need to configure the detailed parameters of the cell to the terminal equipment, but only needs to configure the synchronization signal broadcast channel measurement resource block (synchronization signal and (physical broadcast channel, PBCH) block of the non-serving cell) , SSB) related information can be configured to the terminal device.
  • synchronization signal broadcast channel measurement resource block synchronization signal and (physical broadcast channel, PBCH) block of the non-serving cell
  • SSB synchronization signal broadcast channel measurement resource block
  • the terminal device For each cell (whether it is a serving cell or a non-serving cell), if the terminal device transmits uplink signals to the network device through the cell, the corresponding TA needs to be used, so the terminal device needs to know the TA corresponding to each cell.
  • the TAs corresponding to different cells may be different, depending on whether the locations of the network devices corresponding to these cells are the same. For example, as shown in Figure 3, cell 1 and cell 2 have different locations, and the TAs corresponding to the two cells are generally different.
  • the serving cell For the serving cell, its TA is determined by the method introduced above, that is, the initial TA is determined through random access, and then the TA is adjusted according to the MAC-CE.
  • the TA adjustment of the serving cell is based on the timing advance group (TA group, TAG).
  • TAG corresponds to a group of cells using the same TA value.
  • TAG corresponds to a group of cells using the same TA value.
  • the network device sends MAC-CE to the terminal device to update the TA value of the specified TAG.
  • the specific format of the MAC CE can be shown in Figure 4.
  • the MAC CE includes a TAG identification (identity, ID) field, which is used to indicate which TAG TA value the MAC CE is used to update.
  • the Timing Advance command field is used to indicate a TA change amount. The terminal device adds the TA change amount to the current TA value of the TAG to update the TA of the TAG.
  • the network device cannot trigger the terminal device to perform a random access process directed to a non-serving cell, that is, it cannot instruct the terminal device to send a preamble to the network device of the non-serving cell to obtain the initial TA of the non-serving cell.
  • the TA change amount of the non-serving cell cannot be indicated through the above-mentioned MAC-CE.
  • this application proposes a TA acquisition method so that the terminal device can obtain the TA of the non-serving cell, thereby accurately performing uplink transmission in the non-serving cell.
  • this application provides a method for obtaining TA.
  • the specific process of the method may include:
  • Step 501 The network device sends the first information to the terminal device, and accordingly, the terminal device receives the first information from the network device.
  • the first information is used to instruct the terminal device to perform random access to a first cell, and the first cell is a non-serving cell of the terminal device.
  • the first information is used to instruct the terminal device to perform random access of the first cell. It can also be understood that the first information is used to instruct the terminal device to send random access corresponding to the first cell.
  • the random access preamble can also be understood as a random access request, that is, the terminal device initiates a random access request to the network device.
  • the first information may include one or more of the following: cell identification (such as the identification of the first cell), SSB identification (SSB ID) (such as the SSB identification corresponding to the first cell), The identifier of the random access preamble (preamble ID), the random access opportunity (RACH occasion) indication or the random access mask identifier (physical random acess channel, PRACH) mask index).
  • cell identification such as the identification of the first cell
  • SSB ID SSB identification
  • RACH occasion random access opportunity
  • PRACH random access mask identifier
  • the cell identifier in the first information is the non-serving cell identifier.
  • the above-mentioned cell identifier is the first cell identifier, it is used to instruct the terminal device to send the first cell identifier.
  • the first information may also be used to indicate random access of the serving cell.
  • the cell identity in the first information may be the identity of the serving cell.
  • the above cell identity may also be It may be the identity of the serving cell.
  • the first information is used to instruct the terminal device to send the random access preamble of the serving cell, that is, to initiate a random access process to the serving cell.
  • the identity of the first cell may be a (physical cell ID, PCI) or other identity of the first cell, for example, it may be a local identity in at least one non-serving cell configured by the network device for the terminal device.
  • PCI physical cell ID
  • the first information includes a first field, which is used to select a non-serving cell from a plurality of configured non-serving cells, or the first field is used to select a non-serving cell from a plurality of configured non-serving cells. Select one of the multiple configured non-serving cells and the cell that sends the first information. For example, x non-serving cells are currently configured, the first field is used to select one non-serving cell from the x non-serving cells, or the first field is used to select the x non-serving cells and send the Select a cell from the cells with a piece of information (a total of x+1 cells).
  • the non-serving cell is the above-mentioned first cell.
  • the length of the first field is determined according to the number x of configured non-serving cells. For example, the length of the first field is equal to or
  • the first information includes a second field, which is used to select a cell from the cell that sends the first information and a currently activated non-serving cell, that is, a second selection.
  • a value of 0 in the second field indicates selecting a cell to send the first information
  • a value of 1 indicates selecting a non-serving cell for activation.
  • a value of 1 in the second field indicates selecting a cell to send the first information
  • a value of 0 indicates selecting an activated non-serving cell.
  • the non-serving cell is the above-mentioned first cell.
  • the length of this second field is equal to 1 bit.
  • a cell for random access is indicated through a cell indication field (first field or second field) in the first information.
  • the above cell indication field only exists when specific conditions are met.
  • the specific conditions may include one or a combination of the following:
  • the network equipment configures a non-serving cell for the terminal equipment
  • the network device configures two control resource set (CORESET) groups for the terminal device; or in other words, the CORESET configured by the network device for the terminal device corresponds to two CORESET group identifiers CORESETPoolIndex (that is, some CORESET corresponds to CORESETPoolIndex 0 , some CORESET correspond to CORESETPoolIndex 1);
  • the network device configures the existence of the above-mentioned cell indication field through a special RRC parameter
  • Network equipment configuration terminal equipment adopts cell handover based on low-layer signaling.
  • Cell switching based on low-layer signaling refers to using physical layer signaling, such as DCI signaling, or MAC layer signaling, such as MAC-CE, to perform cell switching instructions.
  • the above conditions can be further subdivided.
  • the first condition when the first condition is met, the first field exists.
  • the first condition may include one or a combination of the following:
  • the network equipment configures a non-serving cell for the terminal equipment
  • Cell switching based on low-layer signaling refers to using physical layer signaling, such as DCI signaling, or MAC layer signaling, such as MAC-CE, to perform cell switching;
  • the network device configures the existence of the above-mentioned cell indication field through a special RRC parameter.
  • the second condition may include one or a combination of the following:
  • the network equipment configures a non-serving cell for the terminal equipment
  • the network device configures two CORESET groups for the terminal device; or in other words, the CORESET configured by the network device for the terminal device corresponds to two CORESETPoolIndex parameter values (that is, some CORESET corresponds to the CORESETPoolIndex parameter value 0, and some CORESET corresponds to the CORESETPoolIndex parameter value 1);
  • the network device configures the existence of the above-mentioned cell indication field through a special RRC parameter.
  • the above-mentioned first field and second field can also be represented as the same field, referred to as the third field for short.
  • the corresponding field lengths of the third field are different under different conditions, and the meanings are also different. For example, when the first condition is met, the meaning and field length of the third field are equal to the meaning and field length of the first field mentioned above. When the second condition is met, the meaning and field length of the third field are equal to the meaning and field length of the second field mentioned above.
  • the first information may be downlink control information (DCI), or the network device sends the first information to the terminal device through DCI.
  • DCI downlink control information
  • the first information can also be RRC or MAC CE, etc.
  • the first information may also include corresponding information of other non-serving cells.
  • the first cell in this application may also be defined as a non-serving cell currently activated or currently used for transmission among at least one non-serving cell configured by the network device for the terminal device.
  • the non-serving cell currently activated or currently used for transmission may specifically refer to the non-serving cell corresponding to the currently activated transmission configuration indicator state (TCI-state).
  • TCI-state transmission configuration indicator state
  • the network device can activate at least one TCI-state for the terminal device, and these TCI-states can be used for transmission.
  • Each TCI-state corresponds to a serving cell or non-serving cell. It can be specified that these TCI-states correspond to at most one non-serving cell, and the non-serving cell is the non-serving cell that is currently activated or currently used for transmission.
  • Step 502 The terminal device sends the random access preamble corresponding to the first cell to the network device according to the first information.
  • the terminal device may determine the first cell according to the identity of the first cell in the first information. After determining the first cell, the terminal device determines the random access code of the first cell to be sent from at least one random access preamble corresponding to the first cell according to the identifier of the random access preamble in the first information. Preamble. The terminal device determines an SSB from at least one SSB corresponding to the first cell according to the SSB identifier in the first information, and sends the above random access preamble according to the SSB.
  • the correlation between SSB and random access opportunities in the cell is to determine at least one random access opportunity in the first cell, and then select a random access opportunity from the at least one random access opportunity through the random access mask identifier in the first information. access opportunity, and sends the above random access preamble according to the selected random access opportunity.
  • the above random access mask identifier is used to indicate one random access opportunity from at least one random access opportunity.
  • the terminal device before the network device sends the first information to the terminal device, the terminal device receives the configuration information of the first cell from the network device, and the configuration
  • the information may include at least one or more of the following: the identity of the first cell, the SSB information corresponding to the first cell, and the random access information of the first cell; wherein, the SSB corresponding to the first cell
  • the information may include one or more of the following: SSB set, time domain location of SSB, SSB period or SSB transmission power, etc.
  • the random access information of the first cell may include one or more of the following: random access Input preamble information (such as random access preamble sequence), random access opportunity information or the association between SSB and random access opportunities, etc.
  • the SSB set includes at least one SSB
  • the random access preamble information includes at least one random access preamble.
  • the network device may send configuration information of one or more non-serving cells to the terminal device, where the one or more non-serving cells include the first cell.
  • the network device may send configuration information of one or more non-serving cells to the terminal device through radio resource control (RRC) information.
  • RRC radio resource control
  • the terminal device when the terminal device sends the random access preamble corresponding to the first cell to the network device according to the first information, the terminal device may send the random access preamble corresponding to the first cell according to the first information.
  • the information and the configuration information send the random access preamble corresponding to the first cell to the network device.
  • the terminal device may determine the first SSB and the random access preamble according to the first information and the configuration information; and, the terminal device may determine the first SSB and the random access preamble according to the first information, the configuration information and the The first SSB determines the first random access opportunity; furthermore, the terminal device may send the random access preamble corresponding to the first cell to the network device according to the first SSB and the first random access opportunity. code.
  • the terminal device may use the terminal device beam corresponding to the first SSB to send the random access signal corresponding to the first cell to the network device on the time-frequency resource corresponding to the first random access opportunity. Access preamble.
  • the terminal device determines the first cell based on the identity of the first cell in the first information. determines the first cell based on the identity of the random access preamble in the first information. , determine the random access preamble to be sent among at least one random access preamble corresponding to the first cell included in the random access preamble information in the configuration information.
  • the terminal device may use the identifier of the first cell included in the first information and the identifier of the SSB corresponding to the first cell, and all the identifiers included in the configuration information.
  • the SSB set of the first cell is used to determine the first SSB. For example, the terminal device determines the SSB set corresponding to the first cell based on the identifier of the first cell included in the first information and the set of SSBs included in the configuration information, and then determines the SSB set corresponding to the first cell according to the first information.
  • the identifier of the SSB corresponding to the first cell in the information determines the first SSB in the set of SSBs corresponding to the first cell.
  • the terminal device may be based on the first SSB, the association between the SSB of the first cell and the random access opportunity included in the configuration information, and the first information.
  • the included random access mask identifier or random access opportunity indication determines the first random access opportunity.
  • the terminal device may determine a set of random access opportunities (that is, determine at least one random access opportunity of the first cell) based on the association between the first SSB and the SSB of the first cell and random access opportunities. opportunity), and then identify or or a random access opportunity indication to determine the first random access opportunity in the set of random access opportunities.
  • Step 503 The network device determines the first TA of the first cell according to the random access preamble.
  • the network device performs channel estimation based on the random access preamble, identifies the starting position of the downlink time slot of the terminal device, and combines the starting position of the uplink time slot of the network device with , determine the first TA.
  • Step 504 The network device sends a random access response message to the terminal device, where the random access response message includes the first TA.
  • the random access response message may include a random access preamble identifier, which is used to indicate which random access preamble the random access response message corresponds to.
  • the random access response message may include a TA value, and the terminal device may determine that the TA value is the first TA through any of the following methods.
  • a field in the random access response message may indicate whether the TA included in the random access response message is the TA of the first cell. If this field indicates that the TA included in the random access response message is the TA of the first cell, the terminal device determines that the TA is the first TA. In other words, there is a field in the random access response message that is used to indicate whether the TA included in the random access response message is the TA of the first cell.
  • the above field may be a field composed of the first bit of the random access response message. Alternatively, the above fields may also be composed of part or all bits of existing fields in the random access response message.
  • the format of the random access response message can be as shown in Figure 6.
  • the bits of the temporary cell radio network temporary identifier (C-RNTI) field in the random access response message can be used as the above fields, that is, the bits in the random access response message.
  • Some or all of the bits in the temporary C-RNTI field are used to indicate whether the TA included in the random access response message is the TA of the first cell.
  • the first condition may at least include the following condition: the random access preamble corresponding to the random access response message is a contention-free random access preamble.
  • a field in the random access response message can indicate the TAG information corresponding to the TA contained in the random access response message.
  • the TAG information such as TAG identification, etc.
  • the terminal device determines that the TA included in the random access response message is the TA corresponding to the first cell. , that is, the first TA.
  • there is a field in the random access response message that is used to indicate the TAG identifier corresponding to the TA included in the random access response message.
  • the TAG identifier is the first TAG identifier, it means that the TA included in the random access response message is the TA of the first cell.
  • the first TAG identifier may be a TAG identifier configured by the network device for the first cell, or a TAG identifier specifically reserved for the first cell as specified in the protocol.
  • the network device can configure the TAG identifier corresponding to each non-serving cell for the terminal device. When there are multiple non-serving cells, the TAG identifiers corresponding to these non-serving cells can be constrained to be the same, thereby preventing the non-serving cells from occupying too many TAGs. logo.
  • the above field may be a field composed of the first bit of the random access response message.
  • the above fields may also be composed of part or all bits of existing fields in the random access response message.
  • the format of the random access response message can be as shown in Figure 6.
  • some or all the bits of the temporary C-RNTI field in the random access message can be used as the above fields, that is, some or all the bits of the temporary C-RNTI field in the random access response message are used to indicate the random access response.
  • the message contains information about the TAG corresponding to the TA.
  • some or all bits of the fields that currently exist in the random access response message can be used as the above fields.
  • For the first condition reference may be made to the description of the first condition in Method 1, which will not be described again here.
  • Method 3 The terminal device determines the cell number corresponding to the random access response message based on the cell identifier in the first information.
  • cell if the cell is the first cell, the TA in the random access response message is the TA of the first cell, that is, the first TA.
  • the terminal device can determine the cell identifier corresponding to the random access response message through the following method: first, the terminal device determines the random access preamble identifier corresponding to the random access response message based on the random access preamble identifier in the random access response message. Access preamble. Then the terminal device determines the first information indicating the random access preamble according to the random access preamble, and finally determines the cell identity in the first information.
  • the first information includes the identifier of the first cell. Through this identifier, the terminal device can know that the first information indicates that the random access process performed by the terminal device is for the first cell. Therefore, after receiving the random access After receiving the response message, it can be determined that the TA included in the random access response message is the TA of the first cell, that is, the first TA.
  • Method 4 The terminal device determines the cell corresponding to the random access response message based on the cell associated with the SSB corresponding to the random access response message. If the cell is the first cell, then the TA in the random access response message is the The TA of the first cell is the first TA. For example, the terminal device may determine the random access preamble corresponding to the random access response message and the SSB corresponding to the random access preamble based on the random access preamble identifier in the random access response message. There is an association relationship between the SSB and the cell identity. Through the association relationship, the terminal device can determine the corresponding cell identity through the SSB. In other words, there is an association relationship between the SSB and the cell.
  • the terminal device can know that the first information instructs the terminal device to perform The random access process is for the first cell, so after receiving the random access response message, it can be determined that the TA included in the random access response message is the TA of the first cell, that is, the first TA.
  • the above random access response message can be a random access response (RAR) in the protocol, or it can be a MAC CE. If the random access response message is a MAC CE, the network device needs to send a MAC CE to the terminal device after receiving the random access preamble, and the terminal device receives the MAC CE to obtain the TA information.
  • RAR random access response
  • the above-mentioned first TA is the initial TA corresponding to the first cell. As the terminal device moves, the TA corresponding to the first cell may be continuously updated.
  • the network device After receiving the uplink signal (for example, sounding reference signal (SRS), etc.) sent by the terminal device in the non-serving cell, the network device can determine the TA change amount of the non-serving cell of the terminal device. For example, after receiving the uplink signal sent by the terminal device in the first cell, the network device may determine the TA change amount of the first cell. The network device needs to indicate the TA change amount to the terminal device, so that the terminal device adjusts the first TA according to the TA change amount, thereby making the TA of the first cell more accurate.
  • SRS sounding reference signal
  • the network device may send second information to the terminal device, and accordingly, the terminal device may receive second information from the network device, where the second information is used to indicate the TA of the first cell. amount of change.
  • the terminal device can determine the TA change amount of the first cell based on the second information, and then determines the TA change amount of the first cell based on the second information.
  • the TA change amount updates the TA of the first cell.
  • the second information may be MAC-CE, or the network device may send the second information through MAC-CE.
  • the second information may also be other information, such as RRC information or DCI information, which is not limited in this application.
  • the second information indicates the TA change amount of the first cell, which can be implemented in the following manner:
  • Method a1 If the TAG identifier in the second information is the first TAG identifier, then the TA change amount indicated by the second information is the TA change amount of the first cell, that is, the second information indicates the TA change amount of the first cell. The TA change amount of the first cell.
  • the terminal device can determine according to the first TAG identification indicated in the second information.
  • the second information is determined to indicate the TA change amount of the first cell.
  • the first TAG identifier is a TAG identifier of a non-serving cell defined by the protocol. It can also be understood that the first TAG identifier is a TAG identifier specifically reserved for non-serving cells.
  • the first TAG identifier may be a TAG identifier specifically reserved for the first cell as specified in the protocol.
  • the service cells configured by the network equipment to the terminal equipment belong to up to 4 different TAGs.
  • the network device can configure multiple non-serving cells for the terminal device, of which only one non-serving cell can be used for data transmission. This non-serving cell is called an active non-serving cell.
  • the above-mentioned MAC The TA change amount indicated by the CE is used to update the TA of the active non-serving cell.
  • whether to reserve a TAG ID for a non-serving cell depends on the RRC configuration. For example, it depends on whether non-serving cells are configured. If a non-serving cell is configured, then a certain TAG ID is used for the non-serving cell. After receiving the MAC CE carrying the TAG ID, the terminal device uses the TA change in it to update the TA of the non-serving cell. If no non-serving cell is configured, then the above TAG ID is used for the serving cell associated with that TAG ID. After receiving the MAC CE carrying the TAG ID, the terminal device uses the TA change in it to update the TA of the serving cell associated with the TAG ID.
  • the first TAG identifier is a TAG identifier configured by the network device for a non-serving cell.
  • the first TAG identifier may be a TAG identifier configured by the network device for the first cell.
  • the network device can configure corresponding TAG identifiers for each non-serving cell of the terminal device.
  • the TAG identifiers configured by the network device for multiple non-serving cells can be limited to the same , thereby avoiding occupying too many TAG identifiers.
  • the configuration information of the non-serving cell may include a TAG ID to indicate which TAG the non-serving cell belongs to.
  • TAG IDs of multiple non-serving cells can be configured with the same value.
  • TAG ID can be configured in only one non-serving cell, and the other non-serving cells use the same TAG ID by default.
  • the TAG IDs are configured in different non-serving cells, but the TAG IDs configured in all non-serving cells are the same.
  • the terminal device When the terminal device receives a MAC CE indicating the TA change amount, if the TAG ID in the MAC CE is equal to the TAG ID configured for the non-serving cell, it means that the TA change amount indicated by the MAC CE is used to update the non-serving cell.
  • the TA of the community When the terminal device receives a MAC CE indicating the TA change amount, if the TAG ID in the MAC CE is equal to the TAG ID configured for the non-serving cell, it means that the TA change amount indicated by the MAC CE is used to update the non-serving cell.
  • the TA of the community When the terminal device receives a MAC CE indicating the TA change amount, if the TAG ID in the MAC CE is equal to the TAG ID configured for the non-serving cell, it means that the TA change amount indicated by the MAC CE is used to update the non-serving cell.
  • the TA of the community When the terminal device receives a MAC CE indicating the
  • the TAG ID configured by the network device for the non-serving cell can be any one of the existing protocols, or it can be a TAG ID different from the TAG ID in the existing protocol, which is not limited in this application.
  • Method a2 If the logical channel ID (LCID) corresponding to the second information is the first LCID, then the TA change amount indicated by the second information is the TA change amount of the first cell.
  • LCID logical channel ID
  • the terminal device may determine that the second information is used to indicate the TA change amount of the first cell based on the fact that the LCID corresponding to the second information is the first LCID.
  • the MAC CE used to indicate the TA change amount of the non-serving cell is marked with a specific LCID (such as the first LCID).
  • a specific LCID such as the first LCID.
  • the terminal device determines the corresponding TAG according to the TAG ID field in the MAC CE, and changes the TA indicated in the MAC CE The variation is used for the TA of the serving cell corresponding to the TAG.
  • Method a3 If the group identifier (CORESETPoolIndex) of the control resource set (CORESET) corresponding to the second information is equal to the second value, then the TA change amount indicated by the second information is that of the first cell. TA change amount.
  • the terminal device may determine that the second information is used to indicate the TA change amount of the first cell.
  • the second value may be 0 or 1, or may be other values, which is not limited in this application.
  • CORESET can be divided into two groups, one of which can be used to schedule data transmission of non-serving cells. Therefore, if a MAC CE is scheduled through the CORESET group, or the MAC CE is associated with the CORESET group, the terminal device can determine the TA change amount of the MAC CE used to indicate the non-serving cell.
  • a MAC CE is associated with CORESETPoolIndex1
  • the TA change indicated by the MAC CE is for the non-serving cell.
  • a MAC CE is scheduled through the PDCCH corresponding to CORESETPoolIndex0
  • the TA change indicated by the MAC CE is used for the non-serving cell.
  • the TA change indicated by the MAC CE is for the non-serving cell.
  • Method a4 If the cell identifier included in the second information is the identifier of the first cell, then the TA change amount indicated by the second information is the TA change amount of the first cell.
  • the terminal device may determine that the second information is used to indicate the TA change amount of the first cell based on the identity of the first cell included in the second information.
  • the MAC CE indicating the TA change amount carries the identity of the first cell, and is used to indicate that the TA change amount indicated by the MAC CE is used for the cell corresponding to the first cell identity, that is, the first cell, thereby realizing the Update of TA of non-serving cells.
  • the terminal device can maintain the TA of the first cell and use it for uplink transmission in the first cell.
  • the terminal device sends an uplink signal, it needs to determine whether the uplink signal is sent in a non-serving cell, thereby deciding whether to use the TA corresponding to the non-serving cell to transmit the uplink signal. That is, when the terminal device sends an uplink signal in a non-serving cell, the terminal device determines that the uplink signal is transmitted using the TA corresponding to the non-serving cell, and then the terminal device sends an uplink signal in the non-serving cell according to the TA corresponding to the non-serving cell.
  • the terminal device when the terminal device sends an uplink signal in the serving cell, the terminal device determines that the transmission of the uplink signal uses the TA corresponding to the serving cell, and then the terminal device sends the uplink signal in the serving cell according to the TA corresponding to the serving cell.
  • the terminal device determines that the first uplink signal is transmitted using the method.
  • the terminal device sends the first uplink signal in the first cell according to the TA corresponding to the first cell.
  • the terminal device transmits the first uplink signal in the first cell according to the TA corresponding to the first cell.
  • the first cell sends the first uplink signal.
  • the terminal device may determine the transmission method of the first uplink signal through the following two methods:
  • the TA corresponding to the first cell is as follows:
  • Method b1 When the control resource set group identifier (CORESTEPoolIndex) corresponding to the first uplink signal is equal to the first value, the terminal device determines that the transmission of the first uplink signal uses the TA corresponding to the first cell.
  • CORESTEPoolIndex control resource set group identifier
  • an uplink transmission is associated with a CORESETPoolIndex (such as CORESETPoolIndex 0 or CORESETPoolIndex 1), and the CORESETPoolIndex is associated with a non-serving cell, then the uplink transmission uses the TA of the non-serving cell.
  • CORESETPoolIndex 1 is associated with a non-serving cell, that is, if an uplink transmission is associated with CORESETPoolIndex 1, then the uplink transmission uses the TA of the non-serving cell.
  • the uplink transmission associated with a CORESTPoolIndex may refer to the uplink transmission, such as the physical uplink sharing channel (PUSCH) scheduled through the downlink control information corresponding to the CORESTPoolIndex, or the uplink transmission is the physical downlink scheduled by the CORESTPoolIndex.
  • the feedback message corresponding to the shared channel (Physical downlink sharing channel, PDSCH) may indicate that the uplink transmission is configured with an association relationship with the CORESETPoolIndex, etc.
  • the first value may be 1.
  • the first value may also be 0 or other values, which is not limited in this application.
  • Method b2 When the cell identifier included in the transmission configuration indicator state (TCI-state) corresponding to the first uplink signal is the identifier of the first cell, the terminal device determines that the first uplink The signal is transmitted using the TA corresponding to the first cell.
  • TCI-state transmission configuration indicator state
  • the beam used for uplink transmission is indicated by TCI-state.
  • the TCI-state includes a PCI field, indicating which cell corresponding to the PCI the uplink transmission is directed to.
  • the terminal device uses the TA of the cell corresponding to the PCI to perform the uplink transmission. . If the PCI is the PCI of a non-serving cell, then the uplink transmission uses the TA of the non-serving cell corresponding to the PCI. For example, when the PCI in the TCI-state is the PCI of the first cell, the terminal device determines that the transmission of the first uplink signal uses the TA corresponding to the first cell.
  • Method b3 When the SRS or SRS resource set corresponding to the first uplink signal is associated with the first cell, the terminal device determines that the transmission of the first uplink signal uses the TA corresponding to the first cell.
  • An association relationship can be established between the SRS or SRS resource set and the first cell.
  • the SRS corresponding to the first uplink signal (such as PUSCH) is associated with the first cell, or when the SRS set where the corresponding SRS is located is associated with the first cell.
  • the first uplink signal uses the corresponding TA of the first cell.
  • the terminal device updates the TA of the first cell according to the TA change amount of the first cell and obtains the updated TA of the first cell
  • the terminal equipment determines that the transmission of the second uplink signal uses the TA corresponding to the first cell, and the terminal equipment transmits in the first cell according to the TA corresponding to the first cell.
  • the terminal device sends the second uplink signal in the first cell according to the updated TA of the first cell.
  • the method by which the terminal equipment determines that the transmission of the second uplink signal uses the TA corresponding to the first cell is similar to the method by which the terminal equipment determines that the transmission of the first uplink signal uses the TA corresponding to the first cell, They can refer to each other and will not be described in detail here.
  • the terminal device can also report terminal device capability information to the network device.
  • the terminal device capability information is used to indicate the terminal device's capabilities in TA acquisition or TA maintenance.
  • the terminal equipment capability information includes at least one or more of the following: the number of non-serving cells that can maintain TA, that is, how many non-serving cells TA can be maintained for; the number of TAs of non-serving cells that can be maintained, that is, how many TAs can be maintained , the TA is the TA of the non-serving cell; the total number of TAs that can be maintained is the sum of the number of TAs in the serving cell and the number of TAs in the non-serving cell.
  • the terminal device can obtain the TA of the non-serving cell, thereby accurately performing uplink transmission in the non-serving cell.
  • the communication device 700 may include a transceiver unit 701 and a processing unit 702 .
  • the transceiver unit 701 is used for the communication device 700 to receive messages (information or data) or send messages (information or data), and the processing unit 702 is used to control and manage the actions of the communication device 700 .
  • the processing unit 702 can also control the steps performed by the transceiver unit 701.
  • the communication device 700 may be the terminal device in the above embodiment, a processor in the terminal device, a chip, a chip system, a functional module, etc.; or, the communication device 700 may be It is the network device in the above embodiment, the processor in the network device, or a chip, or a chip system, or a functional module, etc.
  • the transceiver unit 701 can be used to receive first information from the network device, and the first information Used to instruct the terminal device to perform random access to a first cell, where the first cell is a non-serving cell of the terminal device; the processing unit 702 may be used to provide the network device with information based on the first information. Send the random access preamble corresponding to the first cell; the transceiver unit 701 may also be configured to receive a random access response message from the network device, where the random access response message includes the first TA, and the The first TA corresponds to the first cell.
  • the first information may include one or more of the following: the identity of the first cell, the synchronization signal broadcast channel measurement resource block SSB identity corresponding to the first cell, the random access preamble The identification, random access opportunity indication or random access mask identification.
  • the transceiver unit 701 may also be configured to: before receiving the first information from the network device, receive the configuration information of the first cell from the network device, so
  • the configuration information may include one or more of the following: the identity of the first cell, the synchronization signal broadcast channel measurement resource block SSB information corresponding to the first cell, and the random access information of the first cell;
  • the SSB information corresponding to the first cell may include one or more of the following: SSB set, SSB period or SSB transmission power;
  • the random access information of the first cell may include one or more of the following: random access The association between preamble information, random access opportunity information, or SSB and random access opportunities.
  • the processing unit 702 may be configured to: according to the first information and the configuration The information sends the random access preamble corresponding to the first cell to the network device.
  • the processing unit 702 may be configured to: according to the first information and The configuration information determines the first SSB; determines the first random access opportunity based on the first information, the configuration information and the first SSB; and further determines the first random access opportunity based on the first SSB and the first random access opportunity.
  • the processing unit 702 may be configured to: based on the identification and identification of the first cell included in the first information.
  • the first SSB is determined by the identifier of the SSB corresponding to the first cell and the SSB set of the first cell included in the configuration information.
  • the processing unit 702 may be configured to: based on the first SSB, the configuration Information included in said first small
  • the first random access opportunity is determined by the association between the SSB of the area and the random access opportunity, and the random access mask identifier included in the first information.
  • the processing unit 702 may also be configured to: determine that the transmission of the first uplink signal adopts the TA corresponding to the first cell; the transceiver unit 701 may also be configured to use the TA corresponding to the first cell according to the first uplink signal.
  • a TA sends the first uplink signal in the first cell.
  • the processing unit 702 when the processing unit 702 determines that the transmission of the first uplink signal uses the TA corresponding to the first cell, it may be used to: group identification of the control resource set corresponding to the first uplink signal. When equal to the first value, it is determined that the transmission of the first uplink signal uses the TA corresponding to the first cell; or, the cell identity included in the transmission configuration number state TCI-state corresponding to the first uplink signal is the When identifying the first cell, it is determined that the transmission of the first uplink signal uses the TA corresponding to the first cell.
  • the transceiver unit 701 may be further configured to receive second information from the network device, where the second information is used to indicate the TA change amount of the first cell.
  • the second information is used to indicate the TA change amount of the first cell, which may include: if the timing advance group TAG identifier in the second information is the first TAG identifier, then the second The TA change amount indicated by the information is the TA change amount of the first cell; or, if the logical channel identifier LCID corresponding to the second information is the first LCID, the TA change amount indicated by the second information is the TA change amount of the first cell.
  • the cell identifier in the second information is the identifier of the first cell
  • the TA change amount indicated by the second information is the TA change amount of the first cell.
  • the first TAG identifier may be a TAG identifier of a non-serving cell defined by the protocol; or, the first TAG identifier may be a TAG identifier configured by the network device for the non-serving cell.
  • the transceiver unit 701 can be used to send the first information to the terminal device, and the first The information is used to instruct the terminal device to perform random access of a first cell, the first cell being a non-serving cell of the terminal device; and receiving a random access preamble corresponding to the first cell from the terminal device code; the processing unit 702 can be used to determine the first TA of the first cell according to the random access preamble; the transceiver unit 701 can also be used to send a random access response message to the terminal device, The random access response message includes the first TA.
  • the first information may include one or more of the following: the identity of the first cell, the synchronization signal broadcast channel measurement resource block SSB identity corresponding to the first cell, the random access preamble The identification, random access opportunity indication or random access mask identification.
  • the transceiver unit 701 may also be configured to send the configuration information of the first cell to the terminal device before sending the first information to the terminal device.
  • the configuration information It may include one or more of the following: the identity of the first cell, the synchronization signal broadcast channel measurement resource block SSB information corresponding to the first cell, the random access information of the first cell; the first cell
  • the corresponding SSB information may include one or more of the following: SSB set, SSB period or SSB transmission power;
  • the random access information of the first cell may include one or more of the following: random access preamble information , random access opportunity information or the association between SSB and random access opportunities.
  • the transceiver unit 701 may also be configured to receive a first uplink signal in the first cell according to the first TA, and the first uplink signal is transmitted using the corresponding signal of the first cell. TA.
  • the first The uplink signal is transmitted using the TA corresponding to the first cell; or, when the cell identity included in the transmission configuration number state TCI-state corresponding to the first uplink signal is the identity of the first cell, the first cell The uplink signal is transmitted using the TA corresponding to the first cell.
  • the processing unit 702 may also be used to determine the TA change amount of the first cell; the transceiver unit 701 may also be used to send second information to the terminal device.
  • the second information Used to indicate the TA change amount of the first cell.
  • the second information is used to indicate the TA change amount of the first cell, which may include: if the timing advance group TAG identifier in the second information is the first TAG identifier, then the second The TA change amount indicated by the information is the TA change amount of the first cell; or, if the logical channel identifier LCID corresponding to the second information is the first LCID, the TA change amount indicated by the second information is the TA change amount of the first cell.
  • the cell identifier in the second information is the identifier of the first cell
  • the TA change amount indicated by the second information is the TA change amount of the first cell.
  • the first TAG identifier is a TAG identifier of a non-serving cell defined by the protocol; or, the first TAG identifier is a TAG identifier configured by the network device for a non-serving cell.
  • each functional unit in the embodiment of the present application can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit.
  • the above integrated units can be implemented in the form of hardware or software functional units.
  • the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially or contributes to the existing technology, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to cause a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in various embodiments of the application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program code. .
  • the communication device 800 may include a transceiver 801 and a processor 802 .
  • the communication device 800 may also include a memory 803.
  • the memory 803 may be disposed inside the communication device 800 or may be disposed outside the communication device 800 .
  • the processor 802 can control the transceiver 801 to receive and send messages, information or data, etc.
  • the transceiver may be a transceiver or the like.
  • the processor 802 may be a central processing unit (CPU), a network processor (NP) or a combination of CPU and NP.
  • the processor 802 may further include a hardware chip.
  • the above-mentioned hardware chip can be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof.
  • the above-mentioned PLD can be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general array logic (GAL) or any combination thereof.
  • the transceiver 801, the processor 802 and the memory 803 are connected to each other.
  • the transceiver 801, the processor 802 and the memory 803 are connected to each other through a bus 804;
  • the bus 804 can be a peripheral component interconnect standard (Peripheral Component Interconnect, PCI) bus or an extended industry standard structure (Extended Industry Standard Architecture, EISA) bus, etc.
  • PCI peripheral component interconnect standard
  • EISA Extended Industry Standard Architecture
  • the bus can be divided into address bus, data bus, control bus, etc. For ease of presentation, only one thick line is used in Figure 8, but it does not mean that there is only one bus or one type of bus.
  • the memory 803 is used to store programs, etc.
  • the program may include program code including computer operating instructions.
  • the memory 803 may include RAM, and may also include non-volatile memory (non-volatile memory), such as one or more disk memories.
  • the processor 802 executes the application program stored in the memory 803 to implement the above functions, thereby realizing the functions of the communication device 800 .
  • the communication device 800 may be the terminal device in the above embodiment, a processor, a chip, a chip system, etc. in the terminal device.
  • the communication device 800 may also be the network equipment in the above embodiment, a processor, a chip, a chip system, etc. in the network equipment.
  • the transceiver 801 can implement the sending and receiving operations performed by the terminal device in the above embodiment; the processor 802 can Implement other operations other than the sending and receiving operations performed by the terminal device in the above embodiment.
  • the relevant descriptions please refer to the relevant descriptions in the embodiment shown in FIG. 5 , and will not be introduced in detail here.
  • the transceiver 801 can implement the sending and receiving operations performed by the network device in the above embodiment; the processor 802 can Implement other operations other than the sending and receiving operations performed by the network device in the above embodiments.
  • the relevant descriptions please refer to the relevant descriptions in the embodiment shown in FIG. 5 , and will not be introduced in detail here.
  • the communication device 900 may be a terminal device, a processor of the terminal device, or a chip, etc. Alternatively, the communication device 900 may also be a network device, a processor of a network device, or a chip.
  • FIG. 9 shows a simplified structural schematic diagram of the terminal device or the network device.
  • the communication device 900 may include a processor 901 , a memory 902 , and a transceiver 903 .
  • Computer program code can be stored in the memory 902, and the transceiver 903 includes a transmitter 9031, a receiver 9032, a radio frequency circuit (not shown in Figure 9), an antenna 9033, and an input and output device (not shown in Figure 9).
  • the processor 901 can be used to process communication protocols and communication data, control the communication device 900, execute software programs, process data of software programs, etc.
  • Memory 902 is mainly used to store software programs and data.
  • Radio frequency circuits are mainly used for conversion of baseband signals and radio frequency signals and processing of radio frequency signals.
  • the antenna 9033 is mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, keyboards, etc., are mainly used to receive data input by users and output data to users. It should be noted that some types of communication devices 900 may not have input and output devices.
  • the processor 901 When data needs to be sent, the processor 901 performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal and then sends the radio frequency signal out in the form of electromagnetic waves through the antenna 9033.
  • the radio frequency circuit receives the radio frequency signal through the antenna 9033, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 901.
  • the processor 901 converts the baseband signal into data and processes the data. The data is processed.
  • only one memory 902, processor 901, and transceiver 903 are shown in FIG. 9.
  • processors 901 and one or more memories 902 may exist.
  • the memory 902 may also be called a storage medium or a storage device.
  • Memory 902 may be a separate It may be configured independently of the processor 901 or may be integrated with the processor 901, which is not limited in the embodiment of the present application.
  • the antenna and the radio frequency circuit with the transceiver function can be regarded as the transceiver module of the communication device 900
  • the processor with the processing function can be regarded as the processing module of the communication device 900 .
  • the processor 901 may also be called a processing unit, a processing board, a processing module, a processing device, etc.
  • the transceiver 903 may also be called a transceiver unit, a transceiver, a transceiver device, etc.
  • the components in the transceiver 903 used to implement the receiving function can be regarded as a receiving unit, and the components in the transceiver 903 used to implement the transmitting function can be regarded as a sending unit, that is, the transceiver 903 includes a receiver and a transmitter.
  • the transceiver 903 may also be called a transceiver, a transceiver unit, a transceiver circuit, or the like.
  • the receiver may also be called a receiver, receiving unit, or receiving circuit.
  • the transmitter may also be called a transmitter, a transmitting unit or a transmitting circuit.
  • embodiments of the present application provide a communication system, which may include the terminal equipment and network equipment involved in the above embodiments.
  • An embodiment of the present application also provides a computer-readable storage medium.
  • the computer-readable storage medium is used to store a computer program.
  • the computer program When the computer program is executed by a computer, the computer can implement the terminal in the embodiment described in Figure 5. Device or network device functions, etc.
  • An embodiment of the present application also provides a computer program product.
  • the computer program product is used to store a computer program.
  • the computer program When the computer program is executed by a computer, the computer can implement the terminal device or network device in the embodiment described in Figure 5. functions, etc.
  • An embodiment of the present application also provides a chip, including a processor, which is coupled to a memory and configured to call a program in the memory so that the chip implements the terminal device or network device in the embodiment described in Figure 5. functions, etc.
  • An embodiment of the present application also provides a chip, the chip is coupled with a memory, and the chip is used to implement the functions of the terminal device or network device in the embodiment described in FIG. 5 .
  • embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment that combines software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
  • computer-usable storage media including, but not limited to, disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions may also be stored in a computer-readable memory that causes a computer or other programmable data processing apparatus to operate in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction means, the instructions
  • the device implements the functions specified in a process or processes of the flowchart and/or a block or blocks of the block diagram.
  • These computer program instructions may also be loaded onto a computer or other programmable data processing device, causing a series of operating steps to be performed on the computer or other programmable device to produce computer-implemented processing, thereby executing on the computer or other programmable device.
  • Instructions are provided for implementing a process or processes in a flowchart and/or a block diagram The steps for a function specified in a box or boxes.

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Abstract

一种定时提前量的获取方法及装置，以使终端设备可以获取到非服务小区的TA，从而在非服务小区准确地进行上行传输。终端设备接收到网络设备发送的第一信息后，根据所述第一信息向所述网络设备发送第一小区对应的随机接入前导码，其中，第一信息指示所述终端设备进行第一小区的随机接入，第一小区为非服务小区。所述网络设备根据所述随机接入前导码确定所述第一小区的第一TA后，向所述终端设备发送包含所述第一TA的随机接入响应消息，从而实现终端设备获取到非服务小区的TA，进而在非服务小区准确地进行上行传输。

Description

一种定时提前量的获取方法及装置
相关申请的交叉引用
本申请要求在2022年04月27日提交中国专利局、申请号为202210455597.3、申请名称为“一种定时提前量的获取方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种定时提前量(timing advance，TA)的获取方法及装置。
背景技术
在第五代移动通信系统(5th generation，5G)中，上下行传输以时隙为基本时间单元，即每个时隙内传输一次数据。网络设备的时隙起始时刻是固定的，并且上下行时隙是对齐的。终端设备的上下行时隙起始时刻需要根据网络设备的时隙起始时刻和网络设备与终端设备之间的传播时间来确定。假设，网络设备与终端设备之间的信号传播时间为T，目前终端设备的上行时隙起始时刻，要比其下行时隙起始时刻早2T。终端设备的上行时隙起始时刻与下行时隙起始时刻之间的时间差(即2T)又被称为TA。对于下行传输，终端设备通过测量下行导频信号确定其下行时隙起始时刻，并根据该下行时隙起始时刻进行下行信号的接收。对于上行传输，终端设备需要确定TA，并根据该TA和下行时隙起始时刻，确定上行时隙起始时刻(即下行时隙起始时刻-TA)，从而进行上行信号的发送。
TA是一个小区级的参数，每个小区都有对应的TA值。网络设备可以通过一个或多个小区来与终端设备进行数据传输。这些小区可以分为两种：服务小区和非服务小区。然而，目前终端设备只可以确定服务小区的TA，对于非服务小区的TA如何获得还没有方法可以实现，进而导致终端设备不能准确在非服务小区进行上行传输。
发明内容
本申请提供一种TA的获取方法及装置，以使终端设备可以获取到非服务小区的TA，从而在非服务小区准确地进行上行传输。
第一方面，本申请提供了一种TA的获取方法，该方法的可以应用于终端设备，或者配置于终端设备中的部件(如处理器、芯片、电路或其它等)，或者软件模块。以终端设备为例说明，该方法可以包括：终端设备从网络设备接收第一信息后，根据所述第一信息向所述网络设备发送第一小区对应的随机接入前导码，并从所述网络设备接收随机接入响应消息，所述随机接入响应消息中包含与所述第一小区对应的第一TA；其中，所述第一信息可以用于指示所述终端设备进行第一小区的随机接入，所述第一小区为所述终端设备的非服务小区。通过该方法，终端设备可以获取到非服务小区的TA，从而在非服务小区准确地进行上行传输。
在一个可能的设计中，所述第一信息可以包括以下一项或多项：所述第一小区的标识、 所述第一小区对应的同步信号广播信道测量资源块(synchronization signal and(physical broadcast channel，PBCH)block，SSB)标识、所述随机接入前导码的标识、随机接入机会指示或随机接入掩码标识。通过所述第一信息中的信息，终端设备可以确定对应的随机接入前导码以及发送所述随机接入前导码的SSB和随机接入机会，以使终端设备成功发送所述第一小区对应的随机接入前导码。
在一个可能的设计中，在所述终端设备从所述网络设备接收所述第一信息之前，所述终端设备可以从所述网络设备接收所述第一小区的配置信息，所述配置信息可以包括以下一项或多项：所述第一小区的标识、所述第一小区对应的SSB信息、所述第一小区的随机接入信息；例如，所述第一小区对应的SSB信息可以包括以下一项或多项：SSB集合、SSB的周期或SSB的发送功率；例如，所述第一小区的随机接入信息可以包括以下一项或多项：随机接入前导码信息、随机接入机会信息或SSB与随机接入机会的关联关系。通过上述方法，可以使终端设备结合第一信息和所述配置信息准确地确定对应的随机接入前导码以及发送所述随机接入前导码的SSB和随机接入机会，以使终端设备成功发送所述第一小区对应的随机接入前导码。
在一个可能的设计中，所述终端设备可以通过如下方法根据所述第一信息向所述网络设备发送所述第一小区对应的随机接入前导码：所述终端设备根据所述第一信息和所述配置信息向所述网络设备发送所述第一小区对应的随机接入前导码。这样，可以使终端设备结合第一信息和所述配置信息准确地确定对应的随机接入前导码以及发送所述随机接入前导码的SSB和随机接入机会，以使终端设备成功发送所述第一小区对应的随机接入前导码。
在一个可能的设计中，所述终端设备可以通过如下方法根据所述第一信息和所述配置信息向所述网络设备发送所述第一小区对应的随机接入前导码：所述终端设备根据所述第一信息和所述配置信息确定第一SSB；以及所述终端设备根据所述第一信息、所述配置信息和所述第一SSB确定第一随机接入机会；进而，所述终端设备可以根据所述第一SSB和所述第一随机接入机会向所述网络设备发送所述第一小区对应的随机接入前导码。这样，所述终端设备可以准确地确定发送所述随机接入前导码的SSB和随机接入机会，从而成功发送所述第一小区对应的随机接入前导码。
在一个可能的设计中，所述终端设备可以通过如下方法根据所述第一信息和所述配置信息确定所述第一SSB：所述终端设备可以根据所述第一信息中包括的所述第一小区的标识和所述第一小区对应的SSB的标识，以及所述配置信息中包括的所述第一小区的SSB集合，确定所述第一SSB。这样所述终端设备可以准确地确定要发送的所述接入前导码对应的SSB。
在一个可能的设计中，所述终端设备根据所述第一信息、所述配置信息和所述第一SSB确定第一随机接入机会，可以通过如下方法实现：所述终端设备可以根据所述第一SSB，所述配置信息中包括的所述第一小区的SSB与随机接入机会的关联关系，以及所述第一信息中包括的随机接入掩码标识，确定所述第一随机接入机会。这样所述终端设备可以准确地确定要发送的所述接入前导码对应的随机接入机会。
在一个可能的设计中，所述终端设备确定第一上行信号的传输采用所述第一小区对应的TA；之后，所述终端设备根据所述第一TA在所述第一小区发送所述第一上行信号。这样，在终端设备获取到所述第一小区的第一TA后，在需要采用所述第一小区对应的TA 传输上行信号时，所述终端设备可以准确地进行第一小区的上行信号传输。
在一个可能的设计中，所述终端设备可以通过如下方式确定所述第一上行信号的传输采用所述第一小区对应的TA：所述第一上行信号对应的控制资源集合分组标识等于第一值时，所述终端设备确定所述第一上行信号的传输采用所述第一小区对应的TA；或者，所述第一上行信号对应的传输配置编号状态(transmission configuration indicator state，TCI-state)中包括的小区标识为所述第一小区的标识时，所述终端设备确定所述第一上行信号的传输采用所述第一小区对应的TA。终端设备可以通过上述多种方式灵活确定第一上行信号的传输采用第一小区对应的TA，从而准确地进行第一小区的上行信号传输。
在一个可能的设计中，所述终端设备从所述网络设备接收第二信息，所述第二信息用于指示所述第一小区的TA变化量。这样，所述终端设备可以根据所述第一小区的TA变化量更新所述第一小区对应的TA，从而使终端设备采用准确的第一小区的TA来进行上行传输。
在一个可能的设计中，所述第二信息用于指示所述第一小区的TA变化量，可以通过如下方法实现：如果所述第二信息中的定时提前量组(TA group，TAG)标识为第一TAG标识，则所述第二信息指示的TA变化量为所述第一小区的TA变化量；或者，如果所述第二信息对应的逻辑信道标识(logical channel ID，LCID)为第一LCID，则所述第二信息指示的TA变化量为所述第一小区的TA变化量；或者，如果所述第二信息对应的控制资源集合的分组标识等于第二值，则所述第二信息指示的TA变化量为所述第一小区的TA变化量；或者，如果所述第二信息中的小区标识为所述第一小区的标识，则所述第二信息指示的TA变化量为所述第一小区的TA变化量。这样，可以通过多种方式灵活实现第二信息对于第一小区的TA变化量的指示，从而使终端设备根据所述第一小区的TA变化量更新所述第一小区对应的TA，进而使终端设备采用准确的第一小区的TA来进行上行传输。
在一个可能的设计中，所述第一TAG标识可以是协议定义的非服务小区的TAG标识；或者，所述第一TAG标识也可以是所述网络设备为非服务小区配置的TAG标识。
在一个可能的设计中，所述第一信息包括第一字段，所述第一字段用于从配置的多个非服务小区中选择一个非服务小区，或者，所述第一字段用于从配置的多个非服务小区以及发送所述第一信息的小区中选择一个小区。
在一个可能的设计中，当用所述第一字段选择的小区为一个非服务小区时，所述一个非服务小区为所述第一小区。
在一个可能的设计中，所述第一信息包括第二字段，所述第二字段用于从发送所述第一信息的小区和当前激活的一个非服务小区中选择一个小区。
在一个可能的设计中，当用所述第二字段选择的小区为所述当前激活的一个非服务小区时，所述当前激活的一个非服务小区为所述第一小区。
在一个可能的设计中，满足如下条件中的一项或多项的组合时，所述第一信息包括第一字段或第二字段：
所述网络设备为所述终端设备配置了非服务小区；
所述网络设备为所述终端设备配置了两个控制资源集合CORESET分组；
所述网络设备配置了所述第一字段或所述第二字段存在；
所述网络设备配置了所述终端设备采用基于低层信令的小区切换。
第二方面，本申请提供了一种TA的获取方法，该方法的可以应用于网络设备，或者 配置于网络设备中的部件(如处理器、芯片、电路或其它等)，或者软件模块。以网络设备为例说明，该方法可以包括：网络设备向终端设备发送第一信息后，从所述终端设备接收所述第一小区对应的随机接入前导码，根据所述随机接入前导码确定所述第一小区的第一TA，之后向所述终端设备发送随机接入响应消息，所述随机接入响应消息中包含所述第一TA；其中，所述第一信息用于指示所述终端设备进行第一小区的随机接入，所述第一小区为所述终端设备的非服务小区。通过该方法，可以使终端设备获取到非服务小区的TA，从而在非服务小区准确地进行上行传输。
在一个可能的设计中，所述第一信息可以包括以下一项或多项：所述第一小区的标识、所述第一小区对应的同步信号广播信道测量资源块SSB标识、所述随机接入前导码的标识、随机接入机会指示或随机接入掩码标识。通过所述第一信息中的信息，可以使终端设备确定对应的随机接入前导码以及发送所述随机接入前导码的SSB和随机接入机会，以使终端设备成功发送所述第一小区对应的随机接入前导码。
在一个可能的设计中，在所述网络设备向所述终端设备发送第一信息之前，所述网络设备可以向所述终端设备发送所述第一小区的配置信息，所述配置信息可以包括以下一项或多项：所述第一小区的标识、所述第一小区对应的同步信号广播信道测量资源块SSB信息、所述第一小区的随机接入信息；例如，所述第一小区对应的SSB信息可以包括以下一项或多项：SSB集合、SSB的周期或SSB的发送功率；例如，所述第一小区的随机接入信息可以包括以下一项或多项：随机接入前导码信息、随机接入机会信息或SSB与随机接入机会的关联关系。通过上述方法，可以使终端设备结合第一信息和所述配置信息准确地确定对应的随机接入前导码以及发送所述随机接入前导码的SSB和随机接入机会，以使终端设备成功发送所述第一小区对应的随机接入前导码。
在一个可能的设计中，所述网络设备可以根据所述第一TA在所述第一小区接收第一上行信号，所述第一上行信号的传输采用所述第一小区对应的TA。这样网络设备可以接收到准确的第一小区的上行传输。
在一个可能的设计中，所述第一上行信号对应的控制资源集合分组标识等于第一值时，所述第一上行信号的传输采用所述第一小区对应的TA；或者，所述第一上行信号对应的传输配置编号状态TCI-state中包括的小区标识为所述第一小区的标识时，所述第一上行信号的传输采用所述第一小区对应的TA。这样可以通过上述多种方式灵活确定第一上行信号的传输采用第一小区对应的TA。
在一个可能的设计中，所述网络设备确定所述第一小区的TA变化量后，向所述终端设备发送第二信息，所述第二信息用于指示所述第一小区的TA变化量。这样，可以使所述终端设备根据所述第一小区的TA变化量更新所述第一小区对应的TA，从而使终端设备采用准确的第一小区的TA来进行上行传输。
在一个可能的设计中，所述第二信息用于指示所述第一小区的TA变化量，可以通过如下方法实现：如果所述第二信息中的定时提前量组TAG标识为第一TAG标识，则所述第二信息指示的TA变化量为所述第一小区的TA变化量；或者，如果所述第二信息对应的逻辑信道标识LCID为第一LCID，则所述第二信息指示的TA变化量为所述第一小区的TA变化量；或者，如果所述第二信息对应的控制资源集合的分组标识等于第二值，则所述第二信息指示的TA变化量为所述第一小区的TA变化量；或者，如果所述第二信息中的小区标识为所述第一小区的标识，则所述第二信息指示的TA变化量为所述第一小区的 TA变化量。这样，可以通过多种方式灵活实现第二信息对于第一小区的TA变化量的指示，从而使终端设备根据所述第一小区的TA变化量更新所述第一小区对应的TA，进而使终端设备采用准确的第一小区的TA来进行上行传输。
在一个可能的设计中，所述第一TAG标识是协议定义的非服务小区的TAG标识；或者，所述第一TAG标识是所述网络设备为非服务小区配置的TAG标识。
在一个可能的设计中，所述第一信息包括第一字段，所述第一字段用于从配置的多个非服务小区中选择一个非服务小区，或者，所述第一字段用于从配置的多个非服务小区以及发送所述第一信息的小区中选择一个小区。
在一个可能的设计中，当用所述第一字段选择的小区为一个非服务小区时，所述一个非服务小区为所述第一小区。
在一个可能的设计中，所述第一信息包括第二字段，所述第二字段用于从发送所述第一信息的小区和当前激活的一个非服务小区中选择一个小区。
在一个可能的设计中，当用所述第二字段选择的小区为所述当前激活的一个非服务小区时，所述当前激活的一个非服务小区为所述第一小区。
在一个可能的设计中，满足如下条件中的一项或多项的组合时，所述第一信息包括第一字段或第二字段：
所述网络设备为所述终端设备配置了非服务小区；
所述网络设备为所述终端设备配置了两个控制资源集合CORESET分组；
所述网络设备配置了所述第一字段或所述第二字段存在；
所述网络设备配置了所述终端设备采用基于低层信令的小区切换。
第三方面，本申请还提供了一种通信装置，所述通信装置可以是终端设备，该通信装置具有实现上述第一方面或第一方面的各个可能的设计示例中的方法的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
在一个可能的设计中，所述通信装置的结构中可以包括收发单元和处理单元，这些单元可以执行上述第一方面或第一方面的各个可能的设计示例中的相应功能，具体参见方法示例中的详细描述，此处不做赘述。
在一个可能的设计中，所述通信装置的结构中包括收发器和处理器，可选的还包括存储器，所述收发器用于收发数据、消息或信息等，以及用于与通信系统中的其他设备进行通信交互，所述处理器被配置为支持所述通信装置执行上述第一方面或第一方面的各个可能的设计示例中的相应的功能。所述存储器与所述处理器耦合，其保存所述通信装置必要的程序指令和数据。
第四方面，本申请还提供了一种通信装置，所述通信装置可以是网络设备，该通信装置具有实现上述第二方面或第二方面的各个可能的设计示例中的方法的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
在一个可能的设计中，所述通信装置的结构中可以包括收发单元和处理单元，这些单元可以执行上述第二方面或第二方面的各个可能的设计示例中的相应功能，具体参见方法示例中的详细描述，此处不做赘述。
在一个可能的设计中，所述通信装置的结构中包括收发器和处理器，可选的还包括存 储器，所述收发器用于收发数据、消息或信息等，以及用于与通信系统中的其他设备进行通信交互，所述处理器被配置为支持所述通信装置执行上述第二方面或第二方面的各个可能的设计示例中的相应的功能。所述存储器与所述处理器耦合，其保存所述通信装置必要的程序指令和数据。
第五方面，本申请实施例提供了一种通信系统，可以包括上述提及的终端设备和网络设备等。
第六方面，本申请实施例提供的一种计算机可读存储介质，该计算机可读存储介质存储有程序指令，当程序指令在计算机上运行时，使得计算机执行本申请实施例第一方面及其任一可能的设计中，或者第二方面及其任一可能的设计中所述的方法。示例性的，计算机可读存储介质可以是计算机能够存取的任何可用介质。以此为例但不限于：计算机可读介质可以包括非瞬态计算机可读介质、随机存取存储器(random-access memory，RAM)、只读存储器(read-only memory，ROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)、CD-ROM或其他光盘存储、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质。
第七方面，本申请实施例提供一种计算机程序产品，包括指令，当所述指令在计算机上运行时，使得上述第一方面或第一方面任一种可能的设计中，或者第二方面或第二方面任一种可能的设计中所述的方法被执行。
第八方面，本申请还提供了一种芯片，包括处理器，所述处理器与存储器耦合，用于读取并执行所述存储器中存储的程序指令，以使所述芯片实现上述第一方面或第一方面任一种可能的设计中，上述第二方面或第二方面任一种可能的设计中所述的方法。
上述第三方面至第八方面中的各个方面以及各个方面可能达到的技术效果请参照上述针对第一方面或第一方面中的各种可能方案，或者第二方面或第二方面中的各种可能方案可以达到的技术效果说明，这里不再重复赘述。
附图说明
图1为本申请提供的一种通信系统的架构示意图；
图2为本申请提供的一种TA的示意图；
图3为本申请提供的一种小区1和小区2对应的TA的示意图；
图4为本申请提供的一种MAC CE的格式的示意图；
图5为本申请提供的一种TA的获取方法的流程示意图；
图6为本申请提供的一种随机接入响应消息的格式的示意图；
图7为本申请提供的一种通信装置的结构示意图；
图8为本申请提供的另一种通信装置的结构示意图；
图9为本申请提供的一种通信装置的结构图。
具体实施方式
下面将结合附图对本申请作进一步地详细描述。
本申请实施例提供一种TA的获取方法及装置，以使终端设备可以获取到非服务小区 的TA，从而在非服务小区准确地进行上行传输。其中，本申请所述方法和装置基于同一技术构思，由于方法及装置解决问题的原理相似，因此装置与方法的实施可以相互参见，重复之处不再赘述。
在本申请的描述中，“第一”、“第二”等词汇，仅用于区分描述的目的，而不能理解为指示或暗示相对重要性，也不能理解为指示或暗示顺序。
在本申请中的描述中，“至少一个(种、项)”是指一个(种、项)或者多个(种、项)，多个(种、项)是指两个(种、项)或者两个(种、项)以上。“以下至少一项”或其类似表达，是指的这些项中的任意组合，包括单项或复数项的任意组合。例如，a,b,或c中的至少一项，可以表示：a，b，c，a和b，a和c，b和c，或，a和b和c，其中，a,b,c可以是单个，也可以是多个。
本申请的描述中“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，其中A、B可以是单数或者复数。“/”表示“或”，例如a/b表示a或b。
为了更加清晰地描述本申请实施例的技术方案，下面结合附图，对本申请实施例提供的TA的获取方法及装置进行详细说明。
本申请实施例适用的通信系统，可以包括多个网络设备，以及一个或多个终端设备。例如，图1示出了本申请实施例适用的一种通信系统的架构，所述通信系统的架构中包括多个网络设备和一个终端设备。图1中以三个网络设备示出(如图1中的网络设备1、网络设备2和网络设备3)。在该图1中多个网络设备可以同时与一个终端设备进行传输。
其中，网络设备可以为具有无线收发功能的设备或可设置于该网络设备的芯片或芯片系统等，该网络设备包括但不限于：基站(evolutional nodeB，eNB或eNodeB)、基站(generation node B，gNB)、宏基站、微基站(也称小站)、无线网络控制器(radio network controller，RNC)、节点B(Node B，NB)、基站控制器(base station controller，BSC)、基站收发台(base transceiver station，BTS)、家庭基站(例如，home evolved NodeB，或home Node B，HNB)、基带单元(baseband unit，BBU)，无线保真(wireless fidelity，Wi-Fi)系统中的接入点(access point，AP)、无线中继节点、无线回传节点、传输点(transmission and reception point，TRP或者transmission point，TP)、云无线接入网络(cloud radio access network，CRAN)场景下的无线控制器等，还可以为构成gNB或传输点的网络节点，如基带单元(BBU)，或，分布式单元(distributed unit，DU)等。
在一些部署中，gNB可以包括集中式单元(centralized unit，CU)和DU。gNB还可以包括射频单元(radio unit，RU)。CU实现gNB的部分功能，DU实现gNB的部分功能，比如，CU实现无线资源控制(radio resource control，RRC)，分组数据汇聚层协议(packet data convergence protocol，PDCP)层的功能，DU实现无线链路控制(radio link control，RLC)、媒体接入控制(media access control，MAC)和物理(physical，PHY)层的功能。由于RRC层的信息最终会变成PHY层的信息，或者，由PHY层的信息转变而来，因而，在这种架构下，高层信令，如RRC层信令或PHCP层信令，也可以认为是由DU发送的，或者，由DU+RU发送的。可以理解的是，网络设备可以为CU节点、或DU节点、或包括CU节点和DU节点的设备。此外，CU可以划分为接入网RAN中的网络设备，也可以将CU划分为核心网CN中的网络设备，对此不作限定。
终端设备也可以称为用户设备(user equipment，UE)、接入终端、用户单元(subscriber  unit)、用户站、移动站(mobile station，MS)、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。本申请的实施例中的终端设备可以是手机(mobile phone)、蜂窝电话(cellular phone)、智能电话(smart phone)、无线数据卡、个人数字助理(personal digital assistant，PDA)电脑、平板电脑(Pad)、带无线收发功能的电脑、无线调制解调器(modem)、手持设备(handset)、膝上型电脑(laptop computer)、机器类型通信(machine type communication，MTC)终端、虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智能穿戴设备(智能眼镜、智能手表、智能耳机等)、智慧家庭(smart home)中的无线终端等等，也可以是能够设置于以上设备的芯片或芯片模组(或芯片系统)等。本申请的实施例对应用场景不做限定。本申请中将具有无线收发功能的终端设备及可设置于前述终端设备的芯片或芯片系统等统称为终端设备。
需要说明的是，图1示的通信系统可以但不限于为第四代(4th Generation，4G)系统、第五代(5th Generation，5G)系统，如新一代无线接入技术(new radio access technology，NR)，可选的，本申请实施例的方法还适用于未来的各种通信系统，例如第六代(6th Generation，6G)系统或者其他通信网络等。
需要说明的是，图1所示的通信系统中示出的设备的数量和类型仅为示例。在通信系统中还可以有更多设备，例如核心网设备等，在图1中不再示出。
目前在5G中，上下行传输都是以时隙为基本时间单元，即每个时隙内传输一次数据。网络设备的时隙起始时刻是固定的，并且上下行时隙是对齐的，终端设备的上下行时隙起始时刻需要根据网络设备的时隙起始时刻，以及网络设备与终端设备之间的传播时间来确定。如图2所示，由于网络设备与终端设备之间的信号传播时间为T，网络设备在时间t发送的信号在终端设备侧要等到t+T才被收到，因此终端设备的下行时隙起始时刻比网络设备的下行时隙起始时刻晚时间T。另一方面，由于网络设备与终端设备之间的信号传播时间为T，终端设备在时间t-T发送的信号在网络设备侧要等到t才被收到，因此终端设备的上行时隙起始时刻比网络设备的上行时隙起始时刻早时间T。因此，终端设备的上行时隙起始时刻，要比其下行时隙起始时刻早2T。上行时隙起始时刻与下行时隙起始时刻之间的时间差(即2T)又被称为定时提前量(timing advance，TA)。对于下行传输，终端设备通过测量下行导频信号确定其下行时隙起始时刻，并根据该下行时隙起始时刻进行下行信号的接收。对于上行传输，终端设备需要确定TA，并根据该TA和下行时隙起始时刻，确定上行时隙起始时刻(即下行时隙起始时刻-TA)，从而进行上行信号的发送。
TA的获取可以分为两步：初始TA的获取和TA调整。初始TA的获取是通过随机接入(random access channel，RACH)过程完成。具体的，终端设备发送一个前导码(preamble)信号给网络设备，该preamble信号是基于下行时隙来进行发送的，即终端设备在终端设备的下行时隙起始时刻开始发送preamble。由于终端设备的下行时隙起始时刻比网络设备的下行时隙起始时刻晚时间T，另外该preamble达到网络设备还需要时间T，导致该preamble收到的时间比网络设备的上行时隙起始时刻晚2T，该2T即为该终端设备的TA。网络设备通过测量该preamble确定该TA，并将确定的TA发送给终端设备，终端设备即可确定对 应的TA值，并在后续上行传输中采用该TA进行传输。随着终端设备移动，其TA值可能会发生变化，因此还需要进行TA调整。具体的，网络设备通过终端设备发送的上行导频信号可以确定终端设备的TA变化量，并通过媒体介入控制-控制单元(medium access control–control element，MAC CE)信令将该TA变化量发送给终端设备，终端设备采用该TA变化量对其维护的TA值进行调整，即可更新其TA值。
TA是一个小区级的参数，每个小区都有对应的TA值。网络设备可以通过一个或多个小区来与终端设备进行数据传输。这些小区可以分为两种：服务小区和非服务小区。服务小区(serving cell)是指配置给终端设备进行载波聚合(carrier aggregation，CA)的小区，也称为载波分量(Carrier component，CC)，网络设备需要将服务小区的详细参数配置给终端设备。非服务小区是指服务小区之外的小区。在R17之前，5G协议不支持采用非服务小区来为终端设备进行数据传输。在R17中，引入了基于非服务小区进行数据传输的机制。对于非服务小区，网络设备不需要将该小区的详细参数都配置给终端设备，而是只需要将该非服务小区的同步信号广播信道测量资源块(synchronization signal and(physical broadcast channel，PBCH)block，SSB)的相关信息配置给终端设备即可。每个非服务小区也对应一个物理小区标识(physical cell ID，PCI)。非服务小区对应的PCI可以称为额外的PCI(additional PCI)。
对于每个小区(不论是服务小区还是非服务小区)，如果终端设备通过该小区向网络设备传输上行信号，都需要采用对应的TA，因此终端设备需要知道每个小区对应的TA。不同的小区对应的TA可能是不同的，具体取决于这些小区对应的网络设备的位置是否相同。例如图3所示，小区1和小区2的位置不同，两个小区对应的TA一般是不同的。
对于服务小区而言，其TA通过前述介绍的方法来确定，即通过随机接入确定初始TA，然后根据MAC-CE对TA进行调整。服务小区的TA调整是基于定时提前量组(TA group，TAG)来进行的。TAG对应一组采用相同TA值的小区。一般而言，同一网络设备上的多个小区属于相同的TAG，采用相同的TA值，不同网络设备上的小区属于不同的TAG，采用不同的TA值。网络设备向终端设备发送MAC-CE，用于对指定TAG的TA值进行更新。该MAC CE的具体格式可以如图4所示。其中MAC CE包括一个TAG标识(identity，ID)字段，用于指示该MAC CE用于更新哪个TAG的TA值。时间提前命令(Timing Advance command)字段用于指示一个TA变化量，终端设备在该TAG的当前TA值的基础上加上该TA变化量，来对该TAG的TA进行更新。
对于非服务小区，由于非服务小区不属于任何TAG，终端设备如何获取非服务小区的TA是一个还未解决的问题。例如，目前网络设备无法触发终端设备执行指向非服务小区的随机接入过程，即无法指示终端设备发送preamble给非服务小区的网络设备来获取非服务小区的初始TA。另外，由于非服务小区不属于任何TAG，无法通过上述MAC-CE来指示该非服务小区的TA变化量。
由上述可知，目前终端设备只可以确定服务小区的TA，对于非服务小区的TA如何获得还没有方法可以实现，进而导致终端设备不能准确在非服务小区进行上行传输。基于此，本申请提出一种TA的获取方法，以使终端设备可以获取到非服务小区的TA，从而在非服务小区准确地进行上行传输。
基于上述描述，本申请提供了一种TA的获取方法，参阅图5所示，该方法的具体流程可以包括：
步骤501：网络设备向终端设备发送第一信息，相应地，所述终端设备从所述网络设备接收所述第一信息。所述第一信息用于指示所述终端设备进行第一小区的随机接入，所述第一小区为所述终端设备的非服务小区。
其中，所述第一信息用于指示所述终端设备进行第一小区的随机接入，也可以理解为所述第一信息用于指示所述终端设备发送所述第一小区对应的随机接入前导码。随机接入前导码也可以理解为随机接入请求，即终端设备向网络设备发起随机接入的请求。
示例性的，所述第一信息可以包括以下一项或多项：小区标识(如所述第一小区的标识)、SSB标识(SSB ID)(如所述第一小区对应的SSB标识)、所述随机接入前导码的标识(preamble ID)、随机接入机会(RACH occasion)指示或随机接入掩码标识(physical random acess channel，PRACH)mask index)。当第一信息用于指示非服务小区的随机接入时，第一信息中的小区标识为非服务小区标识，例如上述小区标识为第一小区标识时，用于指示终端设备发送该第一小区的随机接入前导码，即终端设备向该第一小区发起随机接入过程。可选的，也可以通过第一信息指示服务小区的随机接入，当第一信息指示服务小区的随机接入时，第一信息中的小区标识可以为服务小区的标识，例如上述小区标识也可以是服务小区的标识，这时该第一信息用于指示终端设备发送服务小区的随机接入前导码，即向服务小区发起随机接入过程。
可选的，所述第一小区的标识可以为所述第一小区的(physical cell ID，PCI)或其他标识，例如可以是网络设备为终端设备配置的至少一个非服务小区中的局部标识。
在一种实现方式中，所述第一信息中包括一个第一字段，该第一字段用于从配置的多个非服务小区中选定一个非服务小区，或者，该第一字段用于从配置的多个非服务小区以及发送该第一信息的小区中选定一个小区。例如，当前配置了x个非服务小区，该第一字段用于从该x个非服务小区中选择一个非服务小区，或者，该第一字段用于从该x个非服务小区和发送该第一信息的小区(共x+1个小区)中选择一个小区。当该第一字段指示的小区为一个非服务小区时，该非服务小区即为上述第一小区。该第一字段的长度根据配置的非服务小区的数量x来确定，例如该第一字段的长度等于或
在另一种实现方式中，所述第一信息中包括一个第二字段，该第二字段用于从发送该第一信息的小区和当前激活的一个非服务小区中选择一个小区，即二选一。例如，第二字段的值为0表示选择发送第一信息的小区，值为1表示选择激活的一个非服务小区。或者，第二字段的值为1表示选择发送第一信息的小区，值为0表示选择激活的一个非服务小区。当该第二字段指示的小区为当前激活的一个非服务小区时，该非服务小区即为上述第一小区。该第二字段的长度等于1比特。
上述方法中，通过所述第一信息中的一个小区指示字段(第一字段或第二字段)，来指示进行随机接入的小区。可选的，当特定条件满足时，上述小区指示字段才存在。所述特定条件可以包括以下一项或多项的组合：
网络设备为终端设备配置了非服务小区；
网络设备为终端设备配置了两个控制资源集合(control resource set，CORESET)分组；或者换句话说，网络设备为终端设备配置的CORESET共对应两个CORESET分组标识CORESETPoolIndex(即有的CORESET对应CORESETPoolIndex 0，有的CORESET对应CORESETPoolIndex 1)；
网络设备通过一个专门的RRC参数，配置上述小区指示字段存在；
网络设备配置终端设备采用基于低层信令的小区切换。基于低层信令的小区切换是指采用物理层信令，如DCI信令，或MAC层信令，如MAC-CE，来进行小区切换的指示。
可选的，还可以将上述条件进一步细分。具体的，当第一条件满足时，所述第一字段存在。所述第一条件可以包括以下一项或多项的组合：
网络设备为终端设备配置了非服务小区；
网络设备配置终端设备采用基于低层信令的小区切换。基于低层信令的小区切换是指采用物理层信令，如DCI信令，或MAC层信令，如MAC-CE，来进行小区的切换；
网络设备通过一个专门的RRC参数，配置上述小区指示字段存在。
当第二条件满足时，所述第二字段存在。所述第二条件可以包括以下一项或多项的组合：
网络设备为终端设备配置了非服务小区；
网络设备为终端设备配置了两个CORESET分组；或者换句话说，网络设备为终端设备配置的CORESET共对应两个CORESETPoolIndex参数值(即有的CORESET对应CORESETPoolIndex参数值0，有的CORESET对应CORESETPoolIndex参数值1)；
网络设备通过一个专门的RRC参数，配置上述小区指示字段存在。
上述第一字段和第二字段也可以表示成同一个字段，简称为第三字段，该第三字段在不同的条件下对应的字段长度不同，含义也不同。例如，第一条件满足时，该第三字段的含义以及字段长度等同于前文中第一字段的含义和字段长度。当第二条件满足时，该第三字段的含义和字段长度等同于前文中第二字段的含义和字段长度。
其中，上述描述中的“组合”可以表示逻辑与，逻辑或，或者逻辑与和逻辑或，本申请对此不作限定。
在一种可选的实施方式中，所述第一信息可以为下行控制信息(downlink control information，DCI)，或者，所述网络设备通过DCI向所述终端设备发送所述第一信息。或者第一信息也可以是RRC或MAC CE等。
需要说明的是，本申请仅以第一小区为例说明，其他非服务小区同样适用。可选的，所述第一信息除了所述第一小区的上述信息，还可以包括其他非服务小区的相应信息。或者，也可以限定本申请中的第一小区，为网络设备为终端设备配置的至少一个非服务小区中目前激活的或目前用于传输的非服务小区。目前激活的或目前用于传输的非服务小区可以具体指目前激活的传输配置编号状态(transmission configuration indicator state，TCI-state)对应的非服务小区。例如，网络设备可以为终端设备激活至少一个TCI-state，这些TCI-state可以用于传输，具体采用哪个TCI-state可以进一步通过DCI指示。每个TCI-state对应一个服务小区或非服务小区。可以规定，这些TCI-state最多对应一个非服务小区，而该非服务小区即为目前激活的或目前用于传输的非服务小区。
步骤502：所述终端设备根据所述第一信息向所述网络设备发送所述第一小区对应的随机接入前导码。
在一种可选的实施方式中，所述终端设备可以根据所述第一信息中的所述第一小区的标识确定第一小区。所述终端设备确定第一小区后，根据第一信息中的随机接入前导码的标识，从第一小区对应的至少一个随机接入前导码中，确定要发送的第一小区的随机接入前导码。所述终端设备根据第一信息中的SSB标识，从第一小区对应的至少一个SSB中确定一个SSB，并根据该SSB发送上述随机接入前导码。终端设备根据上述SSB和第一 小区中SSB与随机接入机会的关联关系，确定第一小区中的至少一个随机接入机会，然后通过第一信息中的随机接入掩码标识从上述至少一个随机接入机会中选择一个随机接入机会，并根据选择的该随机接入机会发送上述随机接入前导码。上述随机接入掩码标识用于从至少一个随机接入机会中指示一个随机接入机会。
在一种可选的实施方式中，在所述网络设备向所述终端设备发送所述第一信息之前，所述终端设备从所述网络设备接收所述第一小区的配置信息，所述配置信息可以至少包括以下一项或多项：所述第一小区的标识、所述第一小区对应的SSB信息、所述第一小区的随机接入信息；其中，所述第一小区对应的SSB信息可以包括以下一项或多项：SSB集合、SSB的时域位置、SSB的周期或SSB的发送功率等；所述第一小区的随机接入信息可以包括以下一项或多项：随机接入前导码信息(例如随机接入前导码序列)、随机接入机会信息或SSB与随机接入机会的关联关系等。SSB集合包括至少一个SSB，随机接入前导码信息包括至少一个随机接入前导码。
可选的，所述网络设备可以向所述终端设备发送一个或多个非服务小区的配置信息，所述一个或多个非服务小区包括所述第一小区。
所述网络设备可以通过无线资源控制(radio resource control，RRC)信息向所述终端设备发送一个或多个非服务小区的配置信息。
在一种可选的实施方式中，所述终端设备根据所述第一信息向所述网络设备发送所述第一小区对应的随机接入前导码时，所述终端设备可以根据所述第一信息和所述配置信息向所述网络设备发送所述第一小区对应的随机接入前导码。
例如，所述终端设备可以根据所述第一信息和所述配置信息确定第一SSB和随机接入前导码；以及，所述终端设备可以根据所述第一信息、所述配置信息和所述第一SSB确定第一随机接入机会；进而，所述终端设备可以根据所述第一SSB和所述第一随机接入机会向所述网络设备发送所述第一小区对应的随机接入前导码。示例性的，所述终端设备可以采用所述第一SSB对应的终端设备波束，在所述第一随机接入机会对应的时频资源上向所述网络设备发送所述第一小区对应的随机接入前导码。
在一种可能的方式中，所述终端设备根据所述第一信息中的所述第一小区的标识确定所述第一小区后，根据所述第一信息中的随机接入前导码的标识，在所述配置信息中随机接入前导码信息包括的所述第一小区对应的至少一个随机接入前导码中，确定要发送的随机接入前导码。
在一种可能的方式中，所述终端设备可以根据所述第一信息中包括的所述第一小区的标识和所述第一小区对应的SSB的标识，以及所述配置信息中包括的所述第一小区的SSB集合，确定所述第一SSB。例如，所述终端设备根据所述第一信息中包括的所述第一小区的标识和所述配置信息包含的SSB的集合，确定所述第一小区对应的SSB集合，再根据所述第一信息中的所述第一小区对应的SSB的标识在所述第一小区对应的SSB集合中确定所述第一SSB。
在一种可能的方式中，所述终端设备可以根据所述第一SSB，所述配置信息中包括的所述第一小区的SSB与随机接入机会的关联关系，以及所述第一信息中包括的随机接入掩码标识或者随机接入机会指示，确定所述第一随机接入机会。例如，所述终端设备可以根据所述第一SSB和所述第一小区的SSB与随机接入机会的关联关系，确定一组随机接入机会(即确定所述第一小区的至少一个随机接入机会)，再根据所述随机接入掩码标识或 者随机接入机会指示在所述一组随机接入机会中确定所述第一随机接入机会。
步骤503：所述网络设备根据所述随机接入前导码确定所述第一小区的第一TA。
在一种可选的实施方式中，所述网络设备根据所述随机接入前导码进行信道估计，识别所述终端设备的下行时隙起始位置，结合所述网络设备上行时隙起始位置，确定所述第一TA。
步骤504：所述网络设备向所述终端设备发送随机接入响应消息，所述随机接入响应消息中包含所述第一TA。
随机接入响应消息中可以包括一个随机接入前导码标识，用于表示该随机接入响应消息对应的是哪个随机接入前导码。随机接入响应消息中可以包括一个TA值，终端设备可以通过以下方法中的任意一种判断该TA值为所述第一TA。
方法一：随机接入响应消息中的一个字段可以表示该随机接入响应消息包含的TA是否为第一小区的TA。如果该字段指示该随机接入响应消息包含的TA是第一小区的TA，则终端设备确定该TA为所述第一TA。换句话说，随机接入响应消息中存在一个字段，用于表示该随机接入响应消息包含的TA是否为第一小区的TA。示例性的，上述字段可以是随机接入响应消息的第一比特组成的字段。或者，上述字段也可以由随机接入响应消息中现有的字段的部分或全部比特组成。随机接入响应消息的格式可以如图6所示。例如，可以将随机接入响应消息中的临时的(temporary)小区无线网络临时标识(cell radio network temporary identifier，C-RNTI)字段的部分或全部比特作为上述字段，即随机接入响应消息中的temporary C-RNTI字段的部分或全部比特用于指示该随机接入响应消息包含的TA是否为第一小区的TA。可选的，当满足第一条件时，才可以将随机接入响应消息中当前已经存在的字段的部分或全部比特作为上述字段。其中，第一条件至少可以包括以下条件：所述随机接入响应消息对应的随机接入前导码为免竞争随机接入前导码。
方法二：随机接入响应消息中的一个字段可以表示该随机接入响应消息包含的TA对应的TAG的信息，TAG的信息如TAG标识等。以TAG的信息为TAG的标识为例说明，如果该TAG的标识是第一小区对应的第一TAG标识，则终端设备确定该随机接入响应消息包含的TA为所述第一小区对应的TA，即第一TA。换句话说，随机接入响应消息中存在一个字段，用于表示该随机接入响应消息包含的TA对应的TAG标识。如果该TAG标识为第一TAG标识，则表示该随机接入响应消息包含的TA为第一小区的TA。该第一TAG标识可以是网络设备为第一小区配置的TAG标识，或者是协议规定的专门预留给第一小区的TAG标识。网络设备可以为终端设备配置每个非服务小区对应的TAG标识，当存在多个非服务小区时，可以约束这些非服务小区对应的TAG标识是相同的，从而避免非服务小区占用过多的TAG标识。示例性的，上述字段可以是随机接入响应消息的第一比特组成的字段。或者，上述字段也可以由随机接入响应消息中现有的字段的部分或全部比特组成。随机接入响应消息的格式可以如图6所示。例如，可以将随机接入消息中的temporary C-RNTI字段的部分或全部比特作为上述字段，即随机接入响应消息中的temporary C-RNTI字段的部分或全部比特用于指示该随机接入响应消息包含的TA对应的TAG的信息。可选的，当满足第一条件时，才可以将随机接入响应消息中当前已经存在的字段的部分或全部比特作为上述字段。其中，所述第一条件可以参考方法一中的第一条件的描述，此处不再赘述。
方法三：所述终端设备根据第一信息中的小区标识，判断该随机接入响应消息对应的 小区，如果该小区是第一小区，则该随机接入响应消息中的TA为所述第一小区的TA，即第一TA。具体的，终端设备可以通过以下方法确定该随机接入响应消息对应的小区标识：首先终端设备根据该随机接入响应消息中的随机接入前导码标识，确定该随机接入响应消息对应的随机接入前导码。然后终端设备根据该随机接入前导码确定指示该随机接入前导码的第一信息，最后确定该第一信息中的小区标识。换句话说，第一信息中包括第一小区的标识，通过该标识，终端设备可以知道该第一信息指示终端设备进行的随机接入过程是针对第一小区的，因此在收到随机接入响应消息后可以确定该随机接入响应消息中包含的TA为第一小区的TA，即第一TA。
方法四：终端设备根据该随机接入响应消息对应的SSB关联的小区，判断该随机接入响应消息对应的小区，如果该小区是第一小区，则该随机接入响应消息中的TA为所述第一小区的TA，即第一TA。示例性的，终端设备可以根据该随机接入响应消息中的随机接入前导码标识，确定该随机接入响应消息对应的随机接入前导码，以及该随机接入前导码对应的SSB。该SSB和小区标识存在关联关系，通过该关联关系，终端设备可以通过该SSB确定对应的小区标识。换句话说，SSB与小区之间具有关联关系，当第一信息中指示的SSB关联第一小区时，即使第一信息中不指示小区标识，终端设备也可以知道该第一信息指示终端设备进行的随机接入过程是针对第一小区的，因此在收到随机接入响应消息后可以确定该随机接入响应消息中包含的TA为第一小区的TA，即第一TA。
上述随机接入响应消息可以是协议中的随机接入响应(random access response，RAR)，也可以是MAC CE。如果随机接入响应消息是MAC CE，网络设备需要在收到随机接入前导码后发送一个MAC CE给终端设备，终端设备接收该MAC CE，从而获取其中的TA信息。
上述第一TA为所述第一小区对应的初始TA，随着终端设备的移动，所述第一小区对应的TA可能会不断更新。
网络设备在接收到终端设备在非服务小区发送的上行信号(例如，探测参考信号(sounding reference signal，SRS)等)后，可以确定所述终端设备的非服务小区的TA变化量。例如，所述网络设备在接收到所述终端设备在所述第一小区发送的上行信号后，可以确定所述第一小区的TA变化量。网络设备需要将该TA变化量指示给终端设备，以使终端设备根据该TA变化量对第一TA进行调整，从而使得第一小区的TA更加准确。
例如，所述网络设备可以向所述终端设备发送第二信息，相应地，所述终端设备可以从所述网络设备接收第二信息，所述第二信息用于指示所述第一小区的TA变化量。所述终端设备确定所述第二信息用于指示所述第一小区的TA变化量后，所述终端设备根据所述第二信息即可以确定所述第一小区的TA变化量，进而根据所述TA变化量更新所述第一小区的TA。
可选的，所述第二信息可以为MAC-CE，或者所述网络设备可以通过MAC-CE发送所述第二信息。所述第二信息也可以是其他信息，如RRC信息或DCI信息，本申请不作限定。
示例性的，所述第二信息指示所述第一小区的TA变化量，可以通过如下方式实现：
方式a1、如果所述第二信息中的TAG标识为第一TAG标识，则所述第二信息指示的TA变化量为所述第一小区的TA变化量，即所述第二信息指示所述第一小区的TA变化量。
通过方式a1，所述终端设备可以根据所述第二信息中指示的第一TAG标识，可以确 定所述第二信息用于指示所述第一小区的TA变化量。
一种示例中，所述第一TAG标识是协议定义的非服务小区的TAG标识，也可以理解为所述第一TAG标识是专门预留给非服务小区的TAG标识。
可选的，该第一TAG标识可以是协议规定的专门预留给第一小区的TAG标识。
在现有协议中，最多存在4个TAG，对应的TAG ID分别位0，1，2，3。即网络设备配置给终端设备的服务小区最多属于4个不同的TAG。为了给非服务小区指示TA变化量，可以将其中一个TAG ID(例如可以是TAG ID 0，1，2，3中的任意一个)预留给非服务小区，服务小区只能采用其他TAG ID。例如，将TAG ID＝3预留给非服务小区，服务小区只能采用TAG ID 0，1，2，不能采用TAG ID 3。在这种情况下，当终端设备收到一个用于指示TA变化量的MAC CE时，如果该MAC CE中的TAG ID＝3，那么终端设备确定该MAC CE指示的TA变化量是用于非服务小区。其中，网络设备可以为终端设备配置多个非服务小区，其中只有一个非服务小区可以用于数据传输，该非服务小区称为激活的(active)非服务小区，在这种情况下，上述MAC CE指示的TA变化量用于更新该active非服务小区的TA。
示例性的，是否预留一个TAG ID给非服务小区，取决于RRC配置。例如，取决于是否配置了非服务小区。如果配置了非服务小区，那么某个TAG ID用于非服务小区。终端设备收到携带该TAG ID的MAC CE后，采用其中的TA变化量更新非服务小区的TA。如果未配置非服务小区，那么上述TAG ID用于与该TAG ID关联的服务小区。终端设备收到携带该TAG ID的MAC CE后，采用其中的TA变化量更新与该TAG ID关联的服务小区的TA。
另一种示例中，所述第一TAG标识是所述网络设备为非服务小区配置的TAG标识。
例如，所述第一TAG标识可以是所述网络设备为所述第一小区配置的TAG标识。
可选的，当有多个非服务小区时，网络设备可以为终端设备的每个非服务小区配置对应的TAG标识，所述网络设备为多个非服务小区配置的TAG标识可以限定为相同的，从而避免占用过多的TAG标识。
示例性的，在非服务小区的配置信息中，可以包括一个TAG ID，用于表示该非服务小区属于哪个TAG。当配置了多个非服务小区时，多个非服务小区的TAG ID可以配置成相同的值。TAG ID可以只配置在一个非服务小区中，其余非服务小区默认采用相同的TAG ID。或者，TAG ID配置在不同非服务小区中，但所有非服务小区中配置的TAG ID是相同的。当终端设备收到一个用于指示TA变化量的MAC CE时，如果该MAC CE中的TAG ID等于配置给非服务小区的TAG ID时，表示该MAC CE指示的TA变化量用于更新非服务小区的TA。
可选的，所述网络设备为非服务小区配置的TAG ID可以是现有协议中的任一个，也可以是与现有协议中的TAG ID不同的TAG ID，本申请对此不作限定。
方式a2、如果所述第二信息对应的逻辑信道标识(logical channel ID，LCID)为第一LCID，则所述第二信息指示的TA变化量为所述第一小区的TA变化量。
通过方式a2，所述终端设备可以根据所述第二信息对应的LCID为第一LCID，来确定所述第二信息用于指示所述第一小区的TA变化量。
示例性的，通过一个特定的LCID(如第一LCID)来标记用于指示非服务小区的TA变化量的MAC CE。当终端设备收到一个MAC CE，并且该MAC CE对应的LCID是用于 指示非服务小区的TA变化量的MAC CE的LCID时，终端设备可以确定该MAC CE中的TA变化量用于非服务小区。这时终端设备可以忽略该MAC CE中的TAG ID字段。如果该MAC CE对应的LCID不是用于指示非服务小区的TA变化量的MAC CE的LCID时，终端设备根据该MAC CE中的TAG ID字段确定对应的TAG，并将该MAC CE中指示的TA变化量用于该TAG对应的服务小区的TA。
方式a3、如果所述第二信息对应的控制资源集合(control resource set，CORESET)的分组标识(CORESETPoolIndex)等于第二值，则所述第二信息指示的TA变化量为所述第一小区的TA变化量。
通过方式a3，当所述第二信息对应的控制资源集合的分组标识为第二值时，所述终端设备可以确定所述第二信息用于指示所述第一小区的TA变化量。
可选的，所述第二值可以为0或1，或者还可以为其他值，本申请对此不作限定。
示例性的，CORESET可以分为两个分组，其中一个分组可以用于调度非服务小区的数据传输。因此，如果一个MAC CE是通过该CORESET分组调度的，或者，该MAC CE与该CORESET分组关联，那么终端设备可以确定该MAC CE用于指示非服务小区的TA变化量。例如，上述CORESET分组可以是CORESET分组标识CORESTPoolIndex＝0或CORESETPoolIndex＝1对应的CORESET。如果一个MAC CE是通过CORESETPoolIndex1对应的PDCCH调度的，那么该MAC CE指示的TA变化量用于非服务小区。或者，如果一个MAC CE与CORESETPoolIndex1关联，那么该MAC CE指示的TA变化量用于非服务小区。或者反过来，如果一个MAC CE是通过CORESETPoolIndex0对应的PDCCH调度的，那么该MAC CE指示的TA变化量用于非服务小区。或者，如果一个MAC CE与CORESETPoolIndex0关联，那么该MAC CE指示的TA变化量用于非服务小区。
方式a4、如果所述第二信息中包含的小区标识为所述第一小区的标识，则所述第二信息指示的TA变化量为所述第一小区的TA变化量。
通过方式a4，终端设备可以根据所述第二信息中包含所述第一小区的标识，确定所述第二信息用于指示所述第一小区的TA变化量。
示例性的，在指示TA变化量的MAC CE中携带第一小区的标识，用于指示该MAC CE指示的TA变化量用于该第一小区标识对应的小区，即第一小区，从而实现对非服务小区的TA的更新。
通过上述方法，终端设备可以对第一小区的TA进行维护，并用于第一小区中的上行传输。在所述终端设备进行上行信号发送时，需要确定该上行信号是否在非服务小区发送，从而决定是否采用非服务小区对应的TA传输上行信号。也即，当所述终端设备在非服务小区发送上行信号时，所述终端设备确定上行信号的传输采用非服务小区对应的TA，进而终端设备根据非服务小区对应的TA在非服务小区发送上行信号；当所述终端设备在服务小区发送上行信号时，所述终端设备确定上行信号的传输采用服务小区对应的TA，进而终端设备根据服务小区对应的TA在服务小区发送上行信号。
在一种可选的实施方式中，在所述终端设备获取到所述第一TA之后，当终端设备要进行第一上行信号的传输时，所述终端设备确定第一上行信号的传输采用所述第一小区对应的TA，所述终端设备根据所述第一小区对应的TA在所述第一小区发送所述第一上行信号，此时，所述终端设备根据所述第一TA在所述第一小区发送所述第一上行信号。
示例性的，所述终端设备可以通过如下两种方法确定所述第一上行信号的传输采用所 述第一小区对应的TA：
方法b1、所述第一上行信号对应的控制资源集合分组标识(CORESTEPoolIndex)等于第一值时，所述终端设备确定所述第一上行信号的传输采用所述第一小区对应的TA。
如果一个上行传输是与某个CORESETPoolIndex(例如CORESTPoolIndex 0或CORESETPoolIndex 1)关联的，而该CORESETPoolIndex与非服务小区关联，那么该上行传输采用非服务小区的TA。例如，CORESETPoolIndex 1与非服务小区关联，即如果一个上行传输与CORESETPoolIndex 1关联，那么该上行传输采用非服务小区的TA。其中，上行传输与一个CORESETPoolIndex关联可以是指该上行传输，如物理上行共享信道(physical uplink sharing channel，PUSCH)通过该CORESTPoolIndex对应的下行控制信息调度，或指该上行传输是该CORESTPoolIndex调度的物理下行共享信道(Physical downlink sharing channel，PDSCH)对应的反馈消息，或指该上行传输与该CORESETPoolIndex配置了关联关系等。
可选的，所述第一值可以为1。当然，所述第一值也可以为0或者其他值，本申请对此不作限定。
方法b2、所述第一上行信号对应的传输配置编号状态(transmission configuration indicator state，TCI-state)中包括的小区标识为所述第一小区的标识时，所述终端设备确定所述第一上行信号的传输采用所述第一小区对应的TA。
上行传输采用的波束通过TCI-state来指示，在该TCI-state中包括一个PCI字段，表示该上行传输是指向哪个PCI对应的小区的，终端设备采用该PCI对应的小区的TA进行该上行传输。如果该PCI是非服务小区的PCI，那么该上行传输采用该PCI对应的非服务小区的TA。例如，该TCI-state中的PCI为所述第一小区的PCI时，所述终端设备确定所述第一上行信号的传输采用所述第一小区对应的TA。
方法b3、所述第一上行信号对应的SRS或SRS资源集合是与所述第一小区关联时，所述终端设备确定所述第一上行信号的传输采用所述第一小区对应的TA。
可以在SRS或SRS资源集合与第一小区之间建立关联关系，当第一上行信号(如PUSCH)对应的SRS关联该第一小区时，或对应的SRS所在的SRS集合关联该第一小区时，该第一上行信号采用该第一小区的对应TA。
在一种可选的实施方式中，在所述终端设备根据所述第一小区的TA变化量更新所述第一小区的TA，得到所述第一小区更新后的TA后，当终端设备要进行第二上行信号的传输时，所述终端设备确定第二上行信号的传输采用所述第一小区对应的TA，所述终端设备根据所述第一小区对应的TA在所述第一小区发送所述第二上行信号，此时，所述终端设备根据所述第一小区更新后的TA在所述第一小区发送所述第二上行信号。
其中，所述终端设备确定第二上行信号的传输采用所述第一小区对应的TA的方法，与所述终端设备确定第一上行信号的传输采用所述第一小区对应的TA的方法类似，可以相互参见，此处不再详细描述。
可选的，除了上述步骤以外，终端设备还可以向网络设备上报终端设备能力信息，终端设备能力信息用于表示该终端设备在TA获取或TA维护方面的能力。该终端设备能力信息至少包括以下一项或多项：可以维护TA的非服务小区数，即可以为多少个非服务小区维护TA；可以维护的非服务小区的TA数，即可以维护多少个TA，该TA是非服务小区的TA；可以维护的TA总数，即服务小区的TA数和非服务小区的TA数之和。
通过上述方法，终端设备可以获取非服务小区的TA，从而在非服务小区准确地进行上行传输。
基于以上实施例，本申请实施例还提供了一种通信装置，参阅图7所示，通信装置700可以包括收发单元701和处理单元702。其中，所述收发单元701用于所述通信装置700接收消息(信息或数据)或发送消息(信息或数据)，所述处理单元702用于对所述通信装置700的动作进行控制管理。所述处理单元702还可以控制所述收发单元701执行的步骤。
示例性地，该通信装置700具体可以是上述实施例中的终端设备、所述终端设备中的处理器，或者芯片，或者芯片系统，或者是一个功能模块等；或者，该通信装置700具体可以是上述实施例中的网络设备、所述网络设备中的处理器，或者芯片，或者芯片系统，或者是一个功能模块等。
在一个实施例中，所述通信装置700用于实现上述图5所示的实施例中终端设备的功能时，所述收发单元701可以用于从网络设备接收第一信息，所述第一信息用于指示所述终端设备进行第一小区的随机接入，所述第一小区为所述终端设备的非服务小区；所述处理单元702可以用于根据所述第一信息向所述网络设备发送所述第一小区对应的随机接入前导码；所述收发单元701还可以用于从所述网络设备接收随机接入响应消息，所述随机接入响应消息中包含第一TA，所述第一TA与所述第一小区对应。
示例性的，所述第一信息可以包括以下一项或多项：所述第一小区的标识、所述第一小区对应的同步信号广播信道测量资源块SSB标识、所述随机接入前导码的标识、随机接入机会指示或随机接入掩码标识。
在一种可选的实施方式中，所述收发单元701还可以用于：在从所述网络设备接收所述第一信息之前，从所述网络设备接收所述第一小区的配置信息，所述配置信息可以包括以下一项或多项：所述第一小区的标识、所述第一小区对应的同步信号广播信道测量资源块SSB信息、所述第一小区的随机接入信息；所述第一小区对应的SSB信息可以包括以下一项或多项：SSB集合、SSB的周期或SSB的发送功率；所述第一小区的随机接入信息可以包括以下一项或多项：随机接入前导码信息、随机接入机会信息或SSB与随机接入机会的关联关系。
可选的，所述处理单元702在根据所述第一信息向所述网络设备发送所述第一小区对应的随机接入前导码时，可以用于：根据所述第一信息和所述配置信息向所述网络设备发送所述第一小区对应的随机接入前导码。
例如，所述处理单元702在根据所述第一信息和所述配置信息向所述网络设备发送所述第一小区对应的随机接入前导码时，可以用于：根据所述第一信息和所述配置信息确定第一SSB；根据所述第一信息、所述配置信息和所述第一SSB确定第一随机接入机会；进而根据所述第一SSB和所述第一随机接入机会向所述网络设备发送所述第一小区对应的随机接入前导码。
示例性的，所述处理单元702在根据所述第一信息和所述配置信息确定所述第一SSB时，可以用于：根据所述第一信息中包括的所述第一小区的标识和所述第一小区对应的SSB的标识，以及所述配置信息中包括的所述第一小区的SSB集合，确定所述第一SSB。
可选的，所述处理单元702在根据所述第一信息、所述配置信息和所述第一SSB确定第一随机接入机会时，可以用于：根据所述第一SSB，所述配置信息中包括的所述第一小 区的SSB与随机接入机会的关联关系，以及所述第一信息中包括的随机接入掩码标识，确定所述第一随机接入机会。
在一种可选的实施方式中，所述处理单元702还可以用于：确定第一上行信号的传输采用所述第一小区对应的TA；所述收发单元701还可以用于根据所述第一TA在所述第一小区发送所述第一上行信号。
一种可能的方式中，所述处理单元702在确定所述第一上行信号的传输采用所述第一小区对应的TA时，可以用于：所述第一上行信号对应的控制资源集合分组标识等于第一值时，确定所述第一上行信号的传输采用所述第一小区对应的TA；或者，所述第一上行信号对应的传输配置编号状态TCI-state中包括的小区标识为所述第一小区的标识时，确定所述第一上行信号的传输采用所述第一小区对应的TA。
一种示例中，所述收发单元701还可以用于从所述网络设备接收第二信息，所述第二信息用于指示所述第一小区的TA变化量。
可选的，所述第二信息用于指示所述第一小区的TA变化量，可以包括：如果所述第二信息中的定时提前量组TAG标识为第一TAG标识，则所述第二信息指示的TA变化量为所述第一小区的TA变化量；或者，如果所述第二信息对应的逻辑信道标识LCID为第一LCID，则所述第二信息指示的TA变化量为所述第一小区的TA变化量；或者，如果所述第二信息对应的控制资源集合的分组标识等于第二值，则所述第二信息指示的TA变化量为所述第一小区的TA变化量；或者，如果所述第二信息中的小区标识为所述第一小区的标识，则所述第二信息指示的TA变化量为所述第一小区的TA变化量。
示例性的，所述第一TAG标识可以是协议定义的非服务小区的TAG标识；或者，所述第一TAG标识可以是所述网络设备为非服务小区配置的TAG标识。
在另一个实施例中，所述通信装置700用于实现上述图5所示的实施例中网络设备的功能时，所述收发单元701可以用于向终端设备发送第一信息，所述第一信息用于指示所述终端设备进行第一小区的随机接入，所述第一小区为所述终端设备的非服务小区；以及从所述终端设备接收所述第一小区对应的随机接入前导码；所述处理单元702可以用于根据所述随机接入前导码确定所述第一小区的第一TA；所述收发单元701还可以用于向所述终端设备发送随机接入响应消息，所述随机接入响应消息中包含所述第一TA。
示例性的，所述第一信息可以包括以下一项或多项：所述第一小区的标识、所述第一小区对应的同步信号广播信道测量资源块SSB标识、所述随机接入前导码的标识、随机接入机会指示或随机接入掩码标识。
在一种可选的实施方式中，所述收发单元701还可以用于在向所述终端设备发送第一信息之前，向所述终端设备发送所述第一小区的配置信息，所述配置信息可以包括以下一项或多项：所述第一小区的标识、所述第一小区对应的同步信号广播信道测量资源块SSB信息、所述第一小区的随机接入信息；所述第一小区对应的SSB信息可以包括以下一项或多项：SSB集合、SSB的周期或SSB的发送功率；所述第一小区的随机接入信息可以包括以下一项或多项：随机接入前导码信息、随机接入机会信息或SSB与随机接入机会的关联关系。
一种可能的方式中，所述收发单元701还可以用于根据所述第一TA在所述第一小区接收第一上行信号，所述第一上行信号的传输采用所述第一小区对应的TA。
示例性的，所述第一上行信号对应的控制资源集合分组标识等于第一值时，所述第一 上行信号的传输采用所述第一小区对应的TA；或者，所述第一上行信号对应的传输配置编号状态TCI-state中包括的小区标识为所述第一小区的标识时，所述第一上行信号的传输采用所述第一小区对应的TA。
在一种示例中，所述处理单元702还可以用于确定所述第一小区的TA变化量；所述收发单元701还可以用于向所述终端设备发送第二信息，所述第二信息用于指示所述第一小区的TA变化量。
可选的，所述第二信息用于指示所述第一小区的TA变化量，可以包括：如果所述第二信息中的定时提前量组TAG标识为第一TAG标识，则所述第二信息指示的TA变化量为所述第一小区的TA变化量；或者，如果所述第二信息对应的逻辑信道标识LCID为第一LCID，则所述第二信息指示的TA变化量为所述第一小区的TA变化量；或者，如果所述第二信息对应的控制资源集合的分组标识等于第二值，则所述第二信息指示的TA变化量为所述第一小区的TA变化量；或者，如果所述第二信息中的小区标识为所述第一小区的标识，则所述第二信息指示的TA变化量为所述第一小区的TA变化量。
例如，所述第一TAG标识是协议定义的非服务小区的TAG标识；或者，所述第一TAG标识是所述网络设备为非服务小区配置的TAG标识。
需要说明的是，本申请实施例中对单元的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。在本申请的实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)或处理器(processor)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
基于以上实施例，本申请实施例还提供了一种通信装置，参阅图8所示，通信装置800可以包括收发器801和处理器802。可选的，所述通信装置800中还可以包括存储器803。其中，所述存储器803可以设置于所述通信装置800内部，还可以设置于所述通信装置800外部。其中，所述处理器802可以控制所述收发器801接收和发送消息、信息或数据等。其中，收发器可以是收发器等。
具体地，所述处理器802可以是中央处理器(central processing unit，CPU)，网络处理器(network processor，NP)或者CPU和NP的组合。所述处理器802还可以进一步包括硬件芯片。上述硬件芯片可以是专用集成电路(application-specific integrated circuit，ASIC)，可编程逻辑器件(programmable logic device，PLD)或其组合。上述PLD可以是复杂可编程逻辑器件(complex programmable logic device，CPLD)，现场可编程逻辑门阵列(field-programmable gate array，FPGA)，通用阵列逻辑(generic array logic，GAL)或其任意组合。
其中，所述收发器801、所述处理器802和所述存储器803之间相互连接。可选的， 所述收发器801、所述处理器802和所述存储器803通过总线804相互连接；所述总线804可以是外设部件互连标准(Peripheral Component Interconnect，PCI)总线或扩展工业标准结构(Extended Industry Standard Architecture，EISA)总线等。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示，图8中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
在一种可选的实施方式中，所述存储器803，用于存放程序等。具体地，程序可以包括程序代码，该程序代码包括计算机操作指令。所述存储器803可能包括RAM，也可能还包括非易失性存储器(non-volatile memory)，例如一个或多个磁盘存储器。所述处理器802执行所述存储器803所存放的应用程序，实现上述功能，从而实现通信装置800的功能。
示例性地，该通信装置800可以是上述实施例中的终端设备，终端设备中的处理器、芯片、芯片系统等。该通信装置800也可以是上述实施例中的网络设备，网络设备中的处理器、芯片、芯片系统等。
在一个实施例中，所述通信装置800在实现上述图5所示的实施例中终端设备的功能时，收发器801可以实现上述实施例中的由终端设备执行的收发操作；处理器802可以实现上述实施例中由终端设备执行的除收发操作以外的其他操作。具体的相关具体描述可以参见上述图5所示的实施例中的相关描述，此处不再详细介绍。
在一个实施例中，所述通信装置800在实现上述图5所示的实施例中网络设备的功能时，收发器801可以实现上述实施例中的由网络设备执行的收发操作；处理器802可以实现上述实施例中由网络设备执行的除收发操作以外的其他操作。具体的相关具体描述可以参见上述图5所示的实施例中的相关描述，此处不再详细介绍。
本申请还提供一种通信装置900，该通信装置900可以为终端设备、终端设备的处理器、或芯片等。或者，该通信装置900也可以为网络设备、网络设备的处理器、或芯片等。作为一种示例，当通信装置900为终端设备或网络设备时，图9示出了一种简化的终端设备或网络设备的结构示意图。如图9所示，通信装置900可以包括处理器901、存储器902、以及收发器903。存储器902中可以存储计算机程序代码，收发器903包括发射机9031、接收机9032、射频电路(图9中未画出)、天线9033以及输入输出装置(图9中未画出)。
处理器901可以用于对通信协议以及通信数据进行处理，以及对通信装置900进行控制，执行软件程序，处理软件程序的数据等。存储器902主要用于存储软件程序和数据。射频电路主要用于基带信号与射频信号的转换以及对射频信号的处理。天线9033主要用于收发电磁波形式的射频信号。输入输出装置，如，触摸屏、显示屏，键盘等主要用于接收用户输入的数据以及对用户输出数据。需要说明的是，有些种类的通信装置900可以不具有输入输出装置。
当需要发送数据时，处理器901对待发送的数据进行基带处理后，输出基带信号至射频电路，射频电路将基带信号进行射频处理后将射频信号通过天线9033以电磁波的形式向外发送。当有数据发送到通信装置900时，射频电路通过天线9033接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器901，处理器901将基带信号转换为数据并对该数据进行处理。为便于说明，图9中仅示出了一个存储器902、处理器901和收发器903，在实际的通信装置900产品中，可以存在一个或多个处理器901和一个或多个存储器902。存储器902也可以称为存储介质或者存储设备等。存储器902可以是独 立于处理器901设置，也可以是与处理器901集成在一起，本申请实施例对此不做限制。
在本申请中，可以将具有收发功能的天线和射频电路视为通信装置900的收发模块，将具有处理功能的处理器视为通信装置900的处理模块。
例如，处理器901也可以称为处理单元，处理单板，处理模块、处理装置等，收发器903也可以称为收发单元、收发机、收发装置等。
可选地，可以将收发器903中用于实现接收功能的器件视为接收单元，将收发器903中用于实现发送功能的器件视为发送单元，即收发器903包括接收器和发送器。收发器903有时也可以称为收发机、收发单元、或收发电路等。接收器有时也可以称为接收机、接收单元、或接收电路等。发送器有时也可以称为发射机、发射单元或者发射电路等。
基于以上实施例，本申请实施例提供了一种通信系统，该通信系统可以包括上述实施例涉及的终端设备和网络设备等。
本申请实施例还提供一种计算机可读存储介质，所述计算机可读存储介质用于存储计算机程序，该计算机程序被计算机执行时，所述计算机可以实现上述图5所述的实施例中终端设备或网络设备的功能等。
本申请实施例还提供一种计算机程序产品，所述计算机程序产品用于存储计算机程序，该计算机程序被计算机执行时，所述计算机可以实现上述图5所述的实施例中终端设备或网络设备的功能等。
本申请实施例还提供一种芯片，包括处理器，所述处理器与存储器耦合，用于调用所述存储器中的程序使得所述芯片实现上述图5所述的实施例中终端设备或网络设备的功能等。
本申请实施例还提供一种芯片，所述芯片与存储器耦合，所述芯片用于实现上述图5所述的实施例中终端设备或网络设备的功能等。
本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个 方框或多个方框中指定的功能的步骤。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (65)

  1. 一种定时提前量TA的获取方法，其特征在于，包括：
    终端设备从网络设备接收第一信息，所述第一信息用于指示所述终端设备进行第一小区的随机接入，所述第一小区为所述终端设备的非服务小区；
    所述终端设备根据所述第一信息向所述网络设备发送所述第一小区对应的随机接入前导码；
    所述终端设备从所述网络设备接收随机接入响应消息，所述随机接入响应消息中包含第一TA，所述第一TA与所述第一小区对应。
  2. 如权利要求1所述的方法，其特征在于，所述第一信息包括以下一项或多项：所述第一小区的标识、所述第一小区对应的同步信号广播信道测量资源块SSB标识、所述随机接入前导码的标识、随机接入机会指示或随机接入掩码标识。
  3. 如权利要求1或2所述的方法，其特征在于，在所述终端设备从所述网络设备接收所述第一信息之前，所述方法还包括：
    所述终端设备从所述网络设备接收所述第一小区的配置信息，所述配置信息包括以下一项或多项：所述第一小区的标识、所述第一小区对应的同步信号广播信道测量资源块SSB信息、所述第一小区的随机接入信息；
    所述第一小区对应的SSB信息包括以下一项或多项：SSB集合、SSB的周期或SSB的发送功率；
    所述第一小区的随机接入信息包括以下一项或多项：随机接入前导码信息、随机接入机会信息或SSB与随机接入机会的关联关系。
  4. 如权利要求3所述的方法，其特征在于，所述终端设备根据所述第一信息向所述网络设备发送所述第一小区对应的随机接入前导码，包括：
    所述终端设备根据所述第一信息和所述配置信息向所述网络设备发送所述第一小区对应的随机接入前导码。
  5. 如权利要求4所述的方法，其特征在于，所述终端设备根据所述第一信息和所述配置信息向所述网络设备发送所述第一小区对应的随机接入前导码，包括：
    所述终端设备根据所述第一信息和所述配置信息确定第一SSB；
    所述终端设备根据所述第一信息、所述配置信息和所述第一SSB确定第一随机接入机会；
    所述终端设备根据所述第一SSB和所述第一随机接入机会向所述网络设备发送所述第一小区对应的随机接入前导码。
  6. 如权利要求5所述的方法，其特征在于，所述终端设备根据所述第一信息和所述配置信息确定所述第一SSB，包括：
    所述终端设备根据所述第一信息中包括的所述第一小区的标识和所述第一小区对应的SSB的标识，以及所述配置信息中包括的所述第一小区的SSB集合，确定所述第一SSB。
  7. 如权利要求5所述的方法，其特征在于，所述终端设备根据所述第一信息、所述配置信息和所述第一SSB确定第一随机接入机会，包括：
    所述终端设备根据所述第一SSB，所述配置信息中包括的所述第一小区的SSB与随机接入机会的关联关系，以及所述第一信息中包括的随机接入掩码标识，确定所述第一随机 接入机会。
  8. 如权利要求1-7任一项所述的方法，其特征在于，所述方法还包括：
    所述终端设备确定第一上行信号的传输采用所述第一小区对应的TA；
    所述终端设备根据所述第一TA在所述第一小区发送所述第一上行信号。
  9. 如权利要求8所述的方法，其特征在于，所述终端设备确定所述第一上行信号的传输采用所述第一小区对应的TA，包括：
    所述第一上行信号对应的控制资源集合分组标识等于第一值时，所述终端设备确定所述第一上行信号的传输采用所述第一小区对应的TA；或者
    所述第一上行信号对应的传输配置编号状态TCI-state中包括的小区标识为所述第一小区的标识时，所述终端设备确定所述第一上行信号的传输采用所述第一小区对应的TA。
  10. 如权利要求1-9任一项所述的方法，其特征在于，所述方法还包括：
    所述终端设备从所述网络设备接收第二信息，所述第二信息用于指示所述第一小区的TA变化量。
  11. 如权利要求10所述的方法，其特征在于，所述第二信息用于指示所述第一小区的TA变化量，包括：
    如果所述第二信息中的定时提前量组TAG标识为第一TAG标识，则所述第二信息指示的TA变化量为所述第一小区的TA变化量；或者
    如果所述第二信息对应的逻辑信道标识LCID为第一LCID，则所述第二信息指示的TA变化量为所述第一小区的TA变化量；或者
    如果所述第二信息对应的控制资源集合的分组标识等于第二值，则所述第二信息指示的TA变化量为所述第一小区的TA变化量；或者
    如果所述第二信息中的小区标识为所述第一小区的标识，则所述第二信息指示的TA变化量为所述第一小区的TA变化量。
  12. 如权利要求11所述的方法，其特征在于，
    所述第一TAG标识是协议定义的非服务小区的TAG标识；或者，
    所述第一TAG标识是所述网络设备为非服务小区配置的TAG标识。
  13. 如权利要求1-12任一项所述的方法，其特征在于，所述第一信息包括第一字段，所述第一字段用于从配置的多个非服务小区中选择一个非服务小区，或者，所述第一字段用于从配置的多个非服务小区以及发送所述第一信息的小区中选择一个小区。
  14. 如权利要求13所述的方法，其特征在于，当用所述第一字段选择的小区为一个非服务小区时，所述一个非服务小区为所述第一小区。
  15. 如权利要求1-12任一项所述的方法，其特征在于，所述第一信息包括第二字段，所述第二字段用于从发送所述第一信息的小区和当前激活的一个非服务小区中选择一个小区。
  16. 如权利要求15所述的方法，其特征在于，当用所述第二字段选择的小区为所述当前激活的一个非服务小区时，所述当前激活的一个非服务小区为所述第一小区。
  17. 如权利要求13-16任一项所述的方法，其特征在于，所述方法还包括：
    满足如下条件中的一项或多项的组合时，所述第一信息包括第一字段或第二字段：
    所述网络设备为所述终端设备配置了非服务小区；
    所述网络设备为所述终端设备配置了两个控制资源集合CORESET分组；
    所述网络设备配置了所述第一字段或所述第二字段存在；
    所述网络设备配置了所述终端设备采用基于低层信令的小区切换。
  18. 一种定时提前量TA的获取方法，其特征在于，包括：
    网络设备向终端设备发送第一信息，所述第一信息用于指示所述终端设备进行第一小区的随机接入，所述第一小区为所述终端设备的非服务小区；
    所述网络设备从所述终端设备接收所述第一小区对应的随机接入前导码；
    所述网络设备根据所述随机接入前导码确定所述第一小区的第一TA；
    所述网络设备向所述终端设备发送随机接入响应消息，所述随机接入响应消息中包含所述第一TA。
  19. 如权利要求18所述的方法，其特征在于，所述第一信息包括以下一项或多项：所述第一小区的标识、所述第一小区对应的同步信号广播信道测量资源块SSB标识、所述随机接入前导码的标识、随机接入机会指示或随机接入掩码标识。
  20. 如权利要求18或19所述的方法，其特征在于，在所述网络设备向所述终端设备发送第一信息之前，所述方法还包括：
    所述网络设备向所述终端设备发送所述第一小区的配置信息，所述配置信息包括以下一项或多项：所述第一小区的标识、所述第一小区对应的同步信号广播信道测量资源块SSB信息、所述第一小区的随机接入信息；
    所述第一小区对应的SSB信息包括以下一项或多项：SSB集合、SSB的周期或SSB的发送功率；
    所述第一小区的随机接入信息包括以下一项或多项：随机接入前导码信息、随机接入机会信息或SSB与随机接入机会的关联关系。
  21. 如权利要求18-20任一项所述的方法，其特征在于，所述方法还包括：
    所述网络设备根据所述第一TA在所述第一小区接收第一上行信号，所述第一上行信号的传输采用所述第一小区对应的TA。
  22. 如权利要求21所述的方法，其特征在于，所述第一上行信号对应的控制资源集合分组标识等于第一值时，所述第一上行信号的传输采用所述第一小区对应的TA；或者，所述第一上行信号对应的传输配置编号状态TCI-state中包括的小区标识为所述第一小区的标识时，所述第一上行信号的传输采用所述第一小区对应的TA。
  23. 如权利要求18-22任一项所述的方法，其特征在于，所述方法还包括：
    所述网络设备确定所述第一小区的TA变化量；
    所述网络设备向所述终端设备发送第二信息，所述第二信息用于指示所述第一小区的TA变化量。
  24. 如权利要求23所述的方法，其特征在于，所述第二信息用于指示所述第一小区的TA变化量，包括：
    如果所述第二信息中的定时提前量组TAG标识为第一TAG标识，则所述第二信息指示的TA变化量为所述第一小区的TA变化量；或者
    如果所述第二信息对应的逻辑信道标识LCID为第一LCID，则所述第二信息指示的TA变化量为所述第一小区的TA变化量；或者
    如果所述第二信息对应的控制资源集合的分组标识等于第二值，则所述第二信息指示的TA变化量为所述第一小区的TA变化量；或者
    如果所述第二信息中的小区标识为所述第一小区的标识，则所述第二信息指示的TA变化量为所述第一小区的TA变化量。
  25. 如权利要求24所述的方法，其特征在于，
    所述第一TAG标识是协议定义的非服务小区的TAG标识；或者，
    所述第一TAG标识是所述网络设备为非服务小区配置的TAG标识。
  26. 如权利要求18-25任一项所述的方法，其特征在于，所述第一信息包括第一字段，所述第一字段用于从配置的多个非服务小区中选择一个非服务小区，或者，所述第一字段用于从配置的多个非服务小区以及发送所述第一信息的小区中选择一个小区。
  27. 如权利要求26所述的方法，其特征在于，当用所述第一字段选择的小区为一个非服务小区时，所述一个非服务小区为所述第一小区。
  28. 如权利要求18-25任一项所述的方法，其特征在于，所述第一信息包括第二字段，所述第二字段用于从发送所述第一信息的小区和当前激活的一个非服务小区中选择一个小区。
  29. 如权利要求28所述的方法，其特征在于，当用所述第二字段选择的小区为所述当前激活的一个非服务小区时，所述当前激活的一个非服务小区为所述第一小区。
  30. 如权利要求26-29任一项所述的方法，其特征在于，所述方法还包括：
    满足如下条件中的一项或多项的组合时，所述第一信息包括第一字段或第二字段：
    所述网络设备为所述终端设备配置了非服务小区；
    所述网络设备为所述终端设备配置了两个控制资源集合CORESET分组；
    所述网络设备配置了所述第一字段或所述第二字段存在；
    所述网络设备配置了所述终端设备采用基于低层信令的小区切换。
  31. 一种通信装置，其特征在于，包括：
    收发单元，用于从网络设备接收第一信息，所述第一信息用于指示终端设备进行第一小区的随机接入，所述第一小区为所述终端设备的非服务小区；
    处理单元，用于根据所述第一信息向所述网络设备发送所述第一小区对应的随机接入前导码；
    所述收发单元，还用于从所述网络设备接收随机接入响应消息，所述随机接入响应消息中包含第一TA，所述第一TA与所述第一小区对应。
  32. 如权利要求31所述的装置，其特征在于，所述第一信息包括以下一项或多项：所述第一小区的标识、所述第一小区对应的同步信号广播信道测量资源块SSB标识、所述随机接入前导码的标识、随机接入机会指示或随机接入掩码标识。
  33. 如权利要求31或32所述的装置，其特征在于，所述收发单元，还用于：
    在从所述网络设备接收所述第一信息之前，从所述网络设备接收所述第一小区的配置信息，所述配置信息包括以下一项或多项：所述第一小区的标识、所述第一小区对应的同步信号广播信道测量资源块SSB信息、所述第一小区的随机接入信息；
    所述第一小区对应的SSB信息包括以下一项或多项：SSB集合、SSB的周期或SSB的发送功率；
    所述第一小区的随机接入信息包括以下一项或多项：随机接入前导码信息、随机接入机会信息或SSB与随机接入机会的关联关系。
  34. 如权利要求33所述的装置，其特征在于，所述处理单元在根据所述第一信息向所 述网络设备发送所述第一小区对应的随机接入前导码时，用于：
    根据所述第一信息和所述配置信息向所述网络设备发送所述第一小区对应的随机接入前导码。
  35. 如权利要求34所述的装置，其特征在于，所述处理单元在根据所述第一信息和所述配置信息向所述网络设备发送所述第一小区对应的随机接入前导码时，用于：
    根据所述第一信息和所述配置信息确定第一SSB；
    根据所述第一信息、所述配置信息和所述第一SSB确定第一随机接入机会；
    根据所述第一SSB和所述第一随机接入机会向所述网络设备发送所述第一小区对应的随机接入前导码。
  36. 如权利要求35所述的装置，其特征在于，所述处理单元在根据所述第一信息和所述配置信息确定所述第一SSB时，用于：
    根据所述第一信息中包括的所述第一小区的标识和所述第一小区对应的SSB的标识，以及所述配置信息中包括的所述第一小区的SSB集合，确定所述第一SSB。
  37. 如权利要求35所述的装置，其特征在于，所述处理单元在根据所述第一信息、所述配置信息和所述第一SSB确定第一随机接入机会时，用于：
    根据所述第一SSB，所述配置信息中包括的所述第一小区的SSB与随机接入机会的关联关系，以及所述第一信息中包括的随机接入掩码标识，确定所述第一随机接入机会。
  38. 如权利要求31-37任一项所述的装置，其特征在于，所述处理单元，还用于：
    确定第一上行信号的传输采用所述第一小区对应的TA；
    根据所述第一TA在所述第一小区发送所述第一上行信号。
  39. 如权利要求38所述的装置，其特征在于，所述处理单元在确定所述第一上行信号的传输采用所述第一小区对应的TA时，用于：
    所述第一上行信号对应的控制资源集合分组标识等于第一值时，确定所述第一上行信号的传输采用所述第一小区对应的TA；或者
    所述第一上行信号对应的传输配置编号状态TCI-state中包括的小区标识为所述第一小区的标识时，确定所述第一上行信号的传输采用所述第一小区对应的TA。
  40. 如权利要求31-39任一项所述的装置，其特征在于，所述收发单元，还用于：
    从所述网络设备接收第二信息，所述第二信息用于指示所述第一小区的TA变化量。
  41. 如权利要求40所述的装置，其特征在于，所述第二信息用于指示所述第一小区的TA变化量，包括：
    如果所述第二信息中的定时提前量组TAG标识为第一TAG标识，则所述第二信息指示的TA变化量为所述第一小区的TA变化量；或者
    如果所述第二信息对应的逻辑信道标识LCID为第一LCID，则所述第二信息指示的TA变化量为所述第一小区的TA变化量；或者
    如果所述第二信息对应的控制资源集合的分组标识等于第二值，则所述第二信息指示的TA变化量为所述第一小区的TA变化量；或者
    如果所述第二信息中的小区标识为所述第一小区的标识，则所述第二信息指示的TA变化量为所述第一小区的TA变化量。
  42. 如权利要求41所述的装置，其特征在于，
    所述第一TAG标识是协议定义的非服务小区的TAG标识；或者，
    所述第一TAG标识是所述网络设备为非服务小区配置的TAG标识。
  43. 如权利要求31-42任一项所述的装置，其特征在于，所述第一信息包括第一字段，所述第一字段用于从配置的多个非服务小区中选择一个非服务小区，或者，所述第一字段用于从配置的多个非服务小区以及发送所述第一信息的小区中选择一个小区。
  44. 如权利要求43所述的装置，其特征在于，当用所述第一字段选择的小区为一个非服务小区时，所述一个非服务小区为所述第一小区。
  45. 如权利要求31-42任一项所述的装置，其特征在于，所述第一信息包括第二字段，所述第二字段用于从发送所述第一信息的小区和当前激活的一个非服务小区中选择一个小区。
  46. 如权利要求45所述的装置，其特征在于，当用所述第二字段选择的小区为所述当前激活的一个非服务小区时，所述当前激活的一个非服务小区为所述第一小区。
  47. 如权利要求43-46任一项所述的装置，其特征在于，
    满足如下条件中的一项或多项的组合时，所述第一信息包括第一字段或第二字段：
    所述网络设备为所述终端设备配置了非服务小区；
    所述网络设备为所述终端设备配置了两个控制资源集合CORESET分组；
    所述网络设备配置了所述第一字段或所述第二字段存在；
    所述网络设备配置了所述终端设备采用基于低层信令的小区切换。
  48. 一种通信装置，其特征在于，包括：
    收发单元，用于向终端设备发送第一信息，所述第一信息用于指示所述终端设备进行第一小区的随机接入，所述第一小区为所述终端设备的非服务小区；以及
    从所述终端设备接收所述第一小区对应的随机接入前导码；
    处理单元，用于根据所述随机接入前导码确定所述第一小区的第一TA；
    所述收发单元，还用于向所述终端设备发送随机接入响应消息，所述随机接入响应消息中包含所述第一TA。
  49. 如权利要求48所述的装置，其特征在于，所述第一信息包括以下一项或多项：所述第一小区的标识、所述第一小区对应的同步信号广播信道测量资源块SSB标识、所述随机接入前导码的标识、随机接入机会指示或随机接入掩码标识。
  50. 如权利要求48或49所述的装置，其特征在于，所述收发单元，还用于：
    在向所述终端设备发送第一信息之前，向所述终端设备发送所述第一小区的配置信息，所述配置信息包括以下一项或多项：所述第一小区的标识、所述第一小区对应的同步信号广播信道测量资源块SSB信息、所述第一小区的随机接入信息；
    所述第一小区对应的SSB信息包括以下一项或多项：SSB集合、SSB的周期或SSB的发送功率；
    所述第一小区的随机接入信息包括以下一项或多项：随机接入前导码信息、随机接入机会信息或SSB与随机接入机会的关联关系。
  51. 如权利要求48-50任一项所述的装置，其特征在于，所述处理单元，还用于：
    根据所述第一TA在所述第一小区接收第一上行信号，所述第一上行信号的传输采用所述第一小区对应的TA。
  52. 如权利要求51所述的装置，其特征在于，所述第一上行信号对应的控制资源集合分组标识等于第一值时，所述第一上行信号的传输采用所述第一小区对应的TA；或者， 所述第一上行信号对应的传输配置编号状态TCI-state中包括的小区标识为所述第一小区的标识时，所述第一上行信号的传输采用所述第一小区对应的TA。
  53. 如权利要求48-52任一项所述的装置，其特征在于，
    所述处理单元，还用于确定所述第一小区的TA变化量；
    所述收发单元，还用于向所述终端设备发送第二信息，所述第二信息用于指示所述第一小区的TA变化量。
  54. 如权利要求53所述的装置，其特征在于，所述第二信息用于指示所述第一小区的TA变化量，包括：
    如果所述第二信息中的定时提前量组TAG标识为第一TAG标识，则所述第二信息指示的TA变化量为所述第一小区的TA变化量；或者
    如果所述第二信息对应的逻辑信道标识LCID为第一LCID，则所述第二信息指示的TA变化量为所述第一小区的TA变化量；或者
    如果所述第二信息对应的控制资源集合的分组标识等于第二值，则所述第二信息指示的TA变化量为所述第一小区的TA变化量；或者
    如果所述第二信息中的小区标识为所述第一小区的标识，则所述第二信息指示的TA变化量为所述第一小区的TA变化量。
  55. 如权利要求54所述的装置，其特征在于，
    所述第一TAG标识是协议定义的非服务小区的TAG标识；或者，
    所述第一TAG标识是所述网络设备为非服务小区配置的TAG标识。
  56. 如权利要求48-55任一项所述的装置，其特征在于，所述第一信息包括第一字段，所述第一字段用于从配置的多个非服务小区中选择一个非服务小区，或者，所述第一字段用于从配置的多个非服务小区以及发送所述第一信息的小区中选择一个小区。
  57. 如权利要求56所述的装置，其特征在于，当用所述第一字段选择的小区为一个非服务小区时，所述一个非服务小区为所述第一小区。
  58. 如权利要求48-55任一项所述的装置，其特征在于，所述第一信息包括第二字段，所述第二字段用于从发送所述第一信息的小区和当前激活的一个非服务小区中选择一个小区。
  59. 如权利要求58所述的装置，其特征在于，当用所述第二字段选择的小区为所述当前激活的一个非服务小区时，所述当前激活的一个非服务小区为所述第一小区。
  60. 如权利要求56-59任一项所述的装置，其特征在于，
    满足如下条件中的一项或多项的组合时，所述第一信息包括第一字段或第二字段：
    所述通信装置为所述终端设备配置了非服务小区；
    所述通信装置为所述终端设备配置了两个控制资源集合CORESET分组；
    所述通信装置配置了所述第一字段或所述第二字段存在；
    所述通信装置配置了所述终端设备采用基于低层信令的小区切换。
  61. 一种通信装置，其特征在于，包括存储器，处理器和收发器，其中：
    所述存储器用于存储计算机指令；
    所述收发器，用于接收和发送信息或数据；
    所述处理器与所述存储器耦合，用于调用所述存储器中的所述计算机指令，以通过所述收发器执行如权利要求1-17任一项所述的方法。
  62. 一种通信装置，其特征在于，包括存储器，处理器和收发器，其中：
    所述存储器用于存储计算机指令；
    所述收发器，用于接收和发送信息或数据；
    所述处理器与所述存储器耦合，用于调用所述存储器中的所述计算机指令，以通过所述收发器执行如权利要求18-30任一项所述的方法。
  63. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有计算机可执行指令，所述计算机可执行指令在被所述计算机调用时以执行如权利要求1-17中任一项所述的方法，或者执行如权利要求18-30中任一项所述的方法。
  64. 一种计算机程序产品，其特征在于，包含有指令，当所述指令在计算机上运行时，使得如权利要求1-17中任一项所述的方法被执行，或者使得如权利要求18-30中任一项所述的方法被执行。
  65. 一种芯片，其特征在于，所述芯片与存储器耦合，用于读取并执行所述存储器中存储的程序指令，以实现如权利要求1-17中任一项所述的方法，或者实现如权利要求18-30中任一项所述的方法。
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Publication number Priority date Publication date Assignee Title
WO2021141831A1 (en) * 2020-01-10 2021-07-15 Qualcomm Incorporated Timing advance update for non-serving cell
CN113170416A (zh) * 2019-03-28 2021-07-23 华为技术有限公司 一种数据传输方法及装置
WO2023016332A1 (zh) * 2021-08-09 2023-02-16 华为技术有限公司 一种通信方法以及装置

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* Cited by examiner, † Cited by third party
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CN113170416A (zh) * 2019-03-28 2021-07-23 华为技术有限公司 一种数据传输方法及装置
WO2021141831A1 (en) * 2020-01-10 2021-07-15 Qualcomm Incorporated Timing advance update for non-serving cell
WO2023016332A1 (zh) * 2021-08-09 2023-02-16 华为技术有限公司 一种通信方法以及装置

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