WO2020259410A1 - 用于获取定时提前量的方法和设备 - Google Patents

用于获取定时提前量的方法和设备 Download PDF

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Publication number
WO2020259410A1
WO2020259410A1 PCT/CN2020/097095 CN2020097095W WO2020259410A1 WO 2020259410 A1 WO2020259410 A1 WO 2020259410A1 CN 2020097095 W CN2020097095 W CN 2020097095W WO 2020259410 A1 WO2020259410 A1 WO 2020259410A1
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WIPO (PCT)
Prior art keywords
random access
information
terminal device
access process
verification information
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PCT/CN2020/097095
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English (en)
French (fr)
Inventor
鲍炜
吴昱民
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维沃移动通信有限公司
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Publication of WO2020259410A1 publication Critical patent/WO2020259410A1/zh

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    • 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
    • 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 embodiments of the present application relate to the field of communications, and in particular, to a method and device for obtaining a timing advance (Timing Advance, TA).
  • Timing Advance TA
  • the terminal device In the Long Term Evolution (LTE) system, the terminal device supports the idle state and the connected state; in the New Radio (NR) system, the terminal device supports the idle state, the inactive state, and the connected state.
  • LTE Long Term Evolution
  • NR New Radio
  • the terminal device may have a time accuracy requirement. At this time, the terminal device may perform time correction by receiving the TA sent by the network device to meet the time accuracy requirement.
  • a terminal device in a non-connected state (including the aforementioned idle state or inactive state) cannot obtain the TA.
  • the purpose of the embodiments of the present application is to provide a method and device for obtaining TA, so as to solve the problem that a terminal device in an idle state or an inactive state cannot obtain a TA.
  • a method for obtaining TA is provided, the method is executed by a terminal device, and the method includes:
  • the indication information is used to indicate to the network device that the terminal device obtains the TA through the random access procedure.
  • a method for obtaining TA is provided, the method is executed by a network device, and the method includes:
  • the instruction information is used to instruct the network device that the terminal device obtains the TA through the random access process.
  • a terminal device in a third aspect, includes:
  • the sending unit is used to send instruction information during the random access process
  • the indication information is used to indicate to the network device that the terminal device obtains the TA through the random access process
  • a network device in a fourth aspect, includes:
  • a receiving unit configured to receive indication information in a random access process
  • the instruction information is used to instruct the network device that the terminal device obtains the TA through the random access process.
  • a terminal device in a fifth aspect, includes a processor, a memory, and a computer program stored on the memory and running on the processor.
  • the computer program When the computer program is executed by the processor, The steps of the method for obtaining TA as described in the first aspect are implemented.
  • a network device in a sixth aspect, includes a processor, a memory, and a computer program stored on the memory and running on the processor. When the computer program is executed by the processor, The steps of the method for obtaining TA as described in the second aspect are implemented.
  • a computer-readable storage medium is provided, and a computer program is stored on the computer-readable storage medium.
  • the computer program is executed by a processor, the computer program for obtaining The steps of the TA method.
  • the terminal device may send instruction information through a random access process, and the instruction information is used to indicate to the network device that the purpose of the terminal device to initiate the random access process is to obtain the TA.
  • the network device can send the TA through the random access process, and the terminal device receives the TA and calculates time information to meet the requirements of time accuracy.
  • Fig. 1 is a schematic flowchart of a method for obtaining TA according to an embodiment of the present application
  • Fig. 2 is a schematic diagram of a MAC layer packet format in a method for obtaining a TA according to an embodiment of the present application
  • FIG. 3 is a schematic diagram of the sub-header format of MAC CE in the method for obtaining TA according to the embodiment shown in FIG. 2;
  • FIG. 4 is a schematic diagram of the MAC CE format in the method for obtaining TA according to the embodiment shown in FIG. 2;
  • FIG. 5 is a schematic flowchart of a method for obtaining TA according to another embodiment of the present application.
  • Fig. 6 is a schematic structural diagram of a terminal device according to an embodiment of the present application.
  • Fig. 7 is a schematic structural diagram of a network device according to an embodiment of the present application.
  • Fig. 8 is a schematic structural diagram of a terminal device according to another embodiment of the present application.
  • Fig. 9 is a schematic structural diagram of a network device according to another embodiment of the present application.
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • LTE Time Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • 5G Fifth Generation
  • NR New Radio
  • terminal equipment may include, but is not limited to, a mobile station (Mobile Station, MS), mobile terminal (Mobile Terminal), mobile phone (Mobile Telephone), user equipment (UE), and mobile phone (handset) And portable equipment (portable equipment), vehicles (vehicle), etc.
  • the terminal equipment can communicate with one or more core networks via a radio access network (Radio Access Network, RAN), for example, the terminal equipment can be a mobile phone (or It is called a "cellular" phone), a computer with wireless communication function, etc.
  • the terminal device can also be a portable, pocket-sized, handheld, built-in computer or vehicle-mounted mobile device.
  • a network device is a device deployed in a wireless access network to provide wireless communication functions for terminal devices.
  • the network device may be a base station, and the base station may include various forms of macro base stations, micro base stations, relay stations, and access points.
  • the names of devices with base station functions may be different.
  • an LTE network it is called an evolved NodeB (evolved NodeB, eNB, or eNodeB)
  • eNB evolved NodeB
  • 3G Third Generation
  • Node B Node B
  • Network equipment, etc. the wording does not constitute a restriction.
  • an embodiment of the present application provides a method 100 for obtaining TA.
  • the method may be executed by a terminal device and includes the following steps:
  • S102 Send instruction information during the random access process, where the instruction information is used to instruct the network device that the terminal device obtains the TA through the random access process.
  • a terminal device in a disconnected state can initiate a random access process, and then send indication information to the network device during the random access process, so that the network device determines that the purpose of the terminal device to initiate random access is for Obtain the TA, so that the network device can calculate the TA based on the uplink message sent by the terminal device in the random access process and send it to the terminal device. For example, the network device calculates the TA by measuring the preamble sequence sent by the terminal device, and sends it to the terminal device through the Timing Advance Command field of the RAR.
  • the purpose of random access initiated by a non-connected terminal device is to enter the connected state.
  • the non-connected terminal device initiates the random access process only to obtain the TA, not to enter the connected state.
  • the terminal device sends indication information during the random access process, and the indication information may indicate that the purpose of the terminal device to initiate the random access process is only to obtain the TA.
  • the terminal device may also receive TA during the aforementioned random access process to calculate time information, which may specifically be time correction to meet the requirements of time accuracy.
  • This embodiment does not specifically limit the sequence of receiving TA and sending instruction information. It can be that the instruction information is sent first in the random access process and then the TA is received subsequently, or it can be received first and then sent during the random access process. Instructions.
  • the terminal device when the terminal device in the non-connected state needs to obtain the TA, the terminal device may also initiate the aforementioned random access process, that is, the trigger condition of the random access process is: Get TA.
  • the non-connected state mentioned in the various embodiments of the present application may be a state other than the connected state (Connected) of the terminal device.
  • the non-connected state includes an idle state (Idle); in an NR system , Non-connected state includes inactive state (Inactive) and idle state.
  • the unconnected state may also include other states besides the idle state and the inactive state.
  • the terminal device may send instruction information through a random access procedure, and the instruction information is used to indicate to the network device that the purpose of the terminal device initiating the random access procedure is to obtain the TA.
  • the network device can send the TA through the random access process, and the terminal device receives the TA and calculates time information to meet the requirements of time accuracy.
  • the calculation of time information by the terminal device mentioned in each embodiment of the present application may specifically be time correction/calibration based on the time information indicated in the downlink information.
  • the above indication information can also be used to indicate to the network device that the terminal device does not enter the connected state after the random access process ends, that is, the purpose of initiating the random access process is only to obtain the TA, and the terminal device expects to maintain the random access process.
  • Radio Resource Control (RRC) state before the access process, and it is not expected to enter the connected state.
  • RRC Radio Resource Control
  • Step 1 The terminal device receives physical random access channel (Physical Random Access Channel, PRACH) configuration information.
  • PRACH Physical Random Access Channel
  • the network device instructs certain dedicated (or target) PRACH resources (including PRACH time-frequency resources and/or Preamble resources) to reserve a non-connected terminal device to acquire TA without causing RRC state transition.
  • PRACH resources including PRACH time-frequency resources and/or Preamble resources
  • the terminal device initiates random access through the above-mentioned dedicated PRACH resource, and the network device can determine that the purpose of the terminal device to initiate the random access is only to obtain the TA, and does not expect to enter the connected state after the random access process ends.
  • Step 2 The terminal device sends MSG1.
  • the terminal device sends MSG1 according to the configuration obtained in step 1.
  • the terminal device sends a dedicated (or target) random access preamble sequence
  • the dedicated random access preamble sequence instructs the terminal device to obtain the TA through the random access process, and after the random access process ends Do not enter the connected state.
  • the terminal device sends a preamble sequence on a dedicated PRACH resource, and the preamble sequence sent on the dedicated PRACH resource instructs the terminal device to obtain TA through a random access process, and does not enter the connected state after the random access process ends .
  • the terminal device sends a dedicated preamble sequence on a dedicated PRACH resource, and the dedicated preamble sequence sent on the dedicated PRACH resource instructs the terminal device to obtain the TA through a random access process, and after the random access process ends Do not enter the connected state.
  • Step 3 The terminal device receives MSG2.
  • MSG2 carries TA information.
  • MSG2 also carries UL grant information for terminal equipment to send MSG3.
  • Step 4 The terminal device sends MSG3 on the UL grant resource allocated by MSG2.
  • MSG3 includes first verification information, and the first verification information includes identification information and/or random numbers of the terminal device.
  • Step 5 The terminal device receives the second verification information, and when the second verification information is consistent with the first verification information, calculates the time information based on the TA received in step 2, which may specifically be time correction .
  • the accurate time when the terminal device receives the downlink information should be T+TA/2.
  • the terminal device may also discard the TA received in step 2, and re-initiate the random access procedure to obtain the TA.
  • a dedicated PRACH resource is used to indicate to the network device, and the purpose of instructing the terminal device to initiate a random access procedure is only to obtain the TA, and is not expected to enter the connected state.
  • the terminal device obtains the calculation of the TA time information through the random access process, and maintains the previous non-connected state to reduce power consumption.
  • the first verification information is sent and the second verification information is received, and when the second verification information is consistent with the first verification information, the time information is calculated based on the received TA, avoiding multiple
  • the terminal device uses the same dedicated PRACH resource to initiate a random access process and cannot obtain an accurate TA, which improves the reliability of the obtained TA.
  • Step 1 The terminal device generates an RRC connection establishment request message.
  • the RRC connection establishment request message includes indication information for instructing the network device that the terminal device obtains the TA through the random access process, and does not enter the connected state after the random access process ends.
  • the above-mentioned indication information may use a newly introduced indication information element IE; it may also reuse an existing IE, such as defining a cause value for establishing a new RRC connection.
  • Step 2 The terminal device sends MSG1.
  • the MSG1 sent by the terminal device may specifically be a preamble sequence.
  • Step 3 The terminal device receives MSG2.
  • MSG2 in this step is a random access response message, and the random access response message includes TA.
  • Step 4 The terminal device sends MSG3.
  • the MSG3 sent by the terminal device includes the RRC connection establishment request message generated in step 1.
  • Step 5 The terminal device receives the RRC connection rejection message.
  • the RRC connection rejection message is sent by the network device based on the indication information in the RRC connection establishment request message.
  • the indication information is carried in the RRC connection establishment request message to indicate to the network device that the terminal device initiates the random access procedure only for the purpose of obtaining the TA, and is not expected to enter the connected state. In this way, the terminal device obtains the TA to perform the calculation of time information through the random access process, and maintains the previous non-connected state, reducing power consumption.
  • the RRC connection establishment request message in this embodiment may also be an RRC connection recovery request message.
  • the RRC connection establishment request message sent in step 4 above includes first check information
  • the first check information includes identification information and/or random number of the terminal device
  • the RRC connection rejection message received in step 5 includes the first check information.
  • Second check the information.
  • the method further includes the following step: when the second check information is consistent with the first check information, the time information is calculated based on the TA.
  • the time information is calculated based on the received TA, avoiding that multiple terminal devices use the same dedicated PRACH resource to initiate a random access process and cannot obtain The problem of accurate TA improves the reliability of the obtained TA.
  • Step 1 The terminal device generates an RRC message.
  • the RRC message in this embodiment is different from the RRC connection establishment request message/RRC connection recovery request message in the second embodiment.
  • the RRC message may be newly defined, and the RRC message may only carry the above-mentioned indication information without carrying other redundant information, and the amount of information carried is small, which is convenient for saving signaling overhead.
  • Step 2 The terminal device sends MSG1.
  • the MSG1 sent by the terminal device may specifically be a preamble sequence.
  • Step 3 The terminal device receives MSG2.
  • MSG2 in this step is a random access response message, and the random access response message includes TA.
  • Step 4 The terminal device sends MSG3.
  • the MSG3 sent by the terminal device includes the RRC message generated in step 1.
  • the indication information is carried in the RRC message to indicate to the network device that the terminal device initiates the random access procedure for the purpose of acquiring the TA, and is not expected to enter the connected state. In this way, the terminal device obtains the TA to perform the calculation of time information through the random access process, and maintains the previous non-connected state, reducing power consumption.
  • a new RRC message is defined, and the RRC message may only carry the foregoing indication information, which is convenient for saving signaling overhead.
  • the RRC message sent in step 4 above includes first check information, and the first check information includes identification information and/or random number of the terminal device.
  • This embodiment may further include step 5, which is to receive a second check. Information, when the second verification information is consistent with the first verification information, the time information is calculated based on the TA.
  • the time information is calculated based on the received TA, avoiding that multiple terminal devices use the same dedicated PRACH resource to initiate a random access process and cannot obtain The problem of accurate TA improves the reliability of the obtained TA.
  • Step 1 The terminal device sends MSG1.
  • Step 2 The terminal equipment device receives MSG2.
  • MSG2 carries TA information.
  • MSG2 also carries UL grant information for terminal equipment to send MSG3.
  • Step 3 The terminal device sends MSG3 on the UL grant resource allocated by MSG2.
  • the newly defined Media Access Control Control Element is used in MAG3.
  • the MAC CE is used to indicate to the network device that this random access is only used to obtain the TA.
  • MSG3 also carries identification information and/or random numbers of the terminal equipment. The identification information and/or random number of the terminal device can be carried in the new MAC CE.
  • the MAC CE in this embodiment is included in the MAC PDU (or MAC sub PDU).
  • the format of the MAC PDU can be seen in Figure 2.
  • the MAC PDU includes the MAC CE and the sub-header corresponding to the MAC CE.
  • the sub-header in Figure 3 includes R field, F field, LCID field and L field; among them, the LCID field is used to indicate The type/purpose of the above MAC CE is used to obtain TA; the above R field is a reserved bit, usually set to "0"; the above F field can be used to indicate the corresponding media access control protocol data unit (Media Access Control) Protocol Data Unit, MAC PDU) length; the above L field can be used to indicate the number of bytes of the corresponding MAC PDU.
  • the MAC CE in FIG. 4 carries a contention resolution identification (a type of terminal equipment identification information).
  • Step 4 The terminal device receives the identification information and/or random number of the terminal device carried in the MSG3. After the terminal device confirms that it is consistent with the one sent by itself in step 3, it uses the TA calculation obtained in step 3 to correct the precise time sent by the network device.
  • the MAC CE indicates to the network device that the purpose of initiating the random access procedure is only to obtain the TA, and it is not expected to enter the connected state. In this way, the terminal device obtains the TA to perform the calculation of time information through the random access process, and maintains the previous non-connected state, reducing power consumption.
  • the network device may calculate a TA based on the reception of MSG3 and carry it in MSG4 and send it to the terminal device. Avoiding the inaccuracy of the value obtained by calculating the TA only based on the MSG1 (the TA value carried in the MSG2), and improving the reliability of the TA obtained by the terminal device.
  • the method for obtaining TA according to an embodiment of the present application is described in detail above with reference to FIG. 1.
  • the method for obtaining TA according to another embodiment of the present application will be described in detail below with reference to FIG. 5. It can be understood that the interaction between the network device and the terminal device described from the network device side is the same as the description on the terminal device side in the method shown in FIG. 1, and to avoid repetition, the related description is appropriately omitted.
  • FIG. 5 is a schematic diagram of the implementation process of the method for obtaining TA according to an embodiment of the present application, which can be applied to the network device side. As shown in FIG. 5, the method 500 includes:
  • S502 Receive indication information during the random access process, where the indication information is used to instruct the network device that the terminal device obtains the TA through the random access process.
  • the network device receives indication information during the random access process.
  • the indication information can be used to indicate to the network device that the terminal device initiates the random access process for the purpose of obtaining the TA.
  • the network device can The TA is sent during the random access process, and the terminal device can receive the TA and calculate the time information to meet the time accuracy requirements.
  • the indication information is also used to indicate to the network device that the terminal device does not enter the connected state after the random access process ends.
  • the indication information includes:
  • the target preamble sequence or, the target preamble sequence received on the target PRACH resource.
  • the method further includes:
  • the random access response message includes TA;
  • the first verification information includes identification information and/or a random number of the terminal device
  • the method before receiving the indication information in the random access process, the method further includes:
  • the configuration information is used to indicate the target preamble sequence; or, the configuration information is used to indicate the target PRACH resource and the target preamble sequence.
  • receiving indication information in a random access process includes:
  • Radio resource control RRC message where the RRC message includes indication information.
  • the method before receiving the RRC message, the method further includes:
  • the random access response message includes TA;
  • the method further includes:
  • the RRC connection rejection message is sent based on the instruction information.
  • the RRC message includes first verification information
  • the first verification information includes identification information and/or a random number of the terminal device
  • the RRC connection rejection message includes second verification information.
  • the verification information is used for the terminal device to calculate the time information based on the TA when the second verification information is consistent with the first verification information.
  • the RRC message includes:
  • RRC connection establishment request message or, RRC connection recovery request message; or, newly defined RRC message.
  • receiving indication information in a random access process includes:
  • the method before receiving the MAC CE in the random access process, the method further includes:
  • the random access response message includes TA.
  • the MAC CE includes first verification information, and the first verification information includes the identification information and/or random number of the terminal device.
  • the method After receiving the MAC CE in the random access process, the method also include:
  • the second verification information is sent, and the second verification information is used for the terminal device to calculate the time information based on the TA when the second verification information is consistent with the first verification information.
  • the method further includes:
  • the TA is sent during the random access process, so that the terminal device can calculate the time information based on the TA.
  • the TA includes a first TA and a second TA, and the first TA and the second TA are calculated separately based on different uplink messages.
  • the method for obtaining TA according to the embodiment of the present application is described in detail above with reference to FIGS. 1 to 5.
  • the terminal device according to the embodiment of the present application will be described in detail below with reference to FIG. 6.
  • Fig. 6 is a schematic structural diagram of a terminal device according to an embodiment of the present application. As shown in FIG. 6, the terminal device 600 includes:
  • the sending unit 602 may be used to send indication information during the random access process
  • the indication information is used to instruct the network equipment that the terminal equipment obtains TA through a random access process.
  • the terminal device may send instruction information through a random access process, and the instruction information is used to indicate to the network device that the purpose of the terminal device to initiate the random access process is to obtain the TA.
  • the network device can send the TA through the random access process, and the terminal device receives the TA and calculates time information to meet the requirements of time accuracy.
  • the indication information is also used to indicate to the network device that the terminal device does not enter the connected state after the random access process ends.
  • the indication information includes:
  • the target preamble sequence or, the target preamble sequence sent on the target physical random access channel PRACH resource.
  • the terminal device 600 further includes: a receiving unit, where:
  • the receiving unit may be used to receive a random access response message, where the random access response message includes TA;
  • the sending unit 602 may also be configured to send first check information, where the first check information includes identification information and/or random numbers of the terminal device;
  • the receiving unit may also be configured to receive the second verification information, and when the second verification information is consistent with the first verification information, calculate the time information based on the TA.
  • the terminal device 600 further includes: a receiving unit, which may be used to receive configuration information;
  • the configuration information is used to indicate the target preamble sequence; or, the configuration information is used to indicate the target PRACH resource and the target preamble sequence.
  • the sending unit 602 may be used to send a radio resource control RRC message, where the RRC message includes indication information.
  • the sending unit 602 may also be used to send a preamble sequence; the terminal device 600 further includes: a receiving unit, which may be used to receive a random access response message, the random access response message includes TA; and RRC connection rejection message; wherein, the RRC connection rejection message is sent by the network device based on the indication information.
  • the RRC message includes first verification information
  • the first verification information includes identification information and/or a random number of the terminal device
  • the RRC connection rejection message includes second verification information
  • the receiving unit may also be used to calculate the time information based on the TA when the second verification information is consistent with the first verification information.
  • the RRC message includes:
  • RRC connection establishment request message or, RRC connection recovery request message; or, newly defined RRC message.
  • the sending unit 602 may be used to send a media access control control unit MAC CE during a random access process.
  • the sending unit 602 may be used to send a preamble sequence; the terminal device 600 further includes a receiving unit, which may be used to receive a random access response message, and the random access response message includes a TA.
  • the MAC CE includes first verification information, and the first verification information includes identification information and/or a random number of the terminal device.
  • the terminal device 600 further includes: a receiving unit, which may be used to receive the first verification information. Second, check the information, and if the second check information is consistent with the first check information, calculate the time information based on the TA.
  • the terminal device 600 further includes: a receiving unit, which may be used to receive TA in a random access process; and calculate time information based on the TA.
  • the TA includes a first TA and a second TA, and the first TA and the second TA are calculated by the network device based on different uplink messages.
  • the sending unit 602 may also be used to initiate a random access procedure; wherein, the random access procedure is used to obtain TA.
  • the terminal device 600 can refer to the process of the method 100 corresponding to the embodiment of the present application, and each unit/module in the terminal device 600 and the other operations and/or functions described above are used to implement the corresponding methods in the method 100.
  • Fig. 7 is a schematic structural diagram of a network device according to an embodiment of the present application. As shown in FIG. 7, the network device 700 includes:
  • the receiving unit 702 may be used to receive indication information during the random access process
  • the instruction information is used to instruct the network device that the terminal device obtains the TA through a random access process.
  • the network device receives indication information during the random access process.
  • the indication information can be used to indicate to the network device that the terminal device initiates the random access process for the purpose of obtaining the TA.
  • the network device can The TA is sent during the random access process, and the terminal device can receive the TA and calculate the time information to meet the time accuracy requirements.
  • the indication information is also used to indicate to the network device that the terminal device does not enter the connected state after the random access process ends.
  • the indication information includes:
  • the target preamble sequence or, the target preamble sequence received on the target PRACH resource.
  • the network device 700 further includes a sending unit, where
  • the sending unit may be used to send a random access response message, and the random access response message includes TA;
  • the receiving unit 702 may also be configured to receive first check information, where the first check information includes identification information and/or random numbers of the terminal device;
  • the sending unit may be configured to send the second verification information, so that the terminal device can calculate the time information based on the TA when the second verification information is consistent with the first verification information.
  • the network device 700 further includes a sending unit, which may be used to send configuration information;
  • the configuration information is used to indicate the target preamble sequence; or, the configuration information is used to indicate the target PRACH resource and the target preamble sequence.
  • the receiving unit 702 may be configured to receive a radio resource control RRC message, where the RRC message includes indication information.
  • the receiving unit 702 may also be used to receive a preamble sequence; the network device 700 may also include a sending unit which may be used to send a random access response message, the random access response message includes TA; and, based on The instruction information sends an RRC connection rejection message.
  • the RRC message includes first verification information
  • the first verification information includes identification information and/or a random number of the terminal device
  • the RRC connection rejection message includes second verification information.
  • the verification information is used for the terminal device to calculate the time information based on the TA when the second verification information is consistent with the first verification information.
  • the RRC message includes:
  • RRC connection establishment request message or, RRC connection recovery request message; or, newly defined RRC message.
  • the receiving unit 702 may be used to receive MAC CE during a random access process.
  • the receiving unit 702 may also be used to receive a preamble sequence; the network device 700 further includes a sending unit which may be used to send a random access response message, and the random access response message includes a TA.
  • the MAC CE includes first check information
  • the first check information includes identification information and/or random number of the terminal device
  • the network device 700 further includes a sending unit, which may be used to send the second The check information
  • the second check information is used for the terminal device to calculate the time information based on the TA when the second check information is consistent with the first check information.
  • the network device 700 further includes a sending unit, which may be used to send the TA during the random access process, so that the terminal device calculates time information based on the TA.
  • a sending unit which may be used to send the TA during the random access process, so that the terminal device calculates time information based on the TA.
  • the TA includes a first TA and a second TA, and the first TA and the second TA are calculated separately based on different uplink messages.
  • the network device 700 can refer to the process of the method 500 corresponding to the embodiment of the present application, and each unit/module in the network device 700 and the other operations and/or functions described above are used to implement the corresponding methods in the method 500.
  • Fig. 8 is a block diagram of a terminal device according to another embodiment of the present application.
  • the terminal device 800 shown in FIG. 8 includes: at least one processor 801, a memory 802, at least one network interface 804, and a user interface 803.
  • the various components in the terminal device 800 are coupled together through the bus system 805.
  • the bus system 805 is used to implement connection and communication between these components.
  • the bus system 805 also includes a power bus, a control bus, and a status signal bus.
  • various buses are marked as the bus system 805 in FIG. 8.
  • the user interface 803 may include a display, a keyboard, a pointing device (for example, a mouse, a trackball), a touch panel or a touch screen, etc.
  • the memory 802 in the embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), and electrically available Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be a random access memory (Random Access Memory, RAM), which is used as an external cache.
  • RAM static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • Synchronous DRAM Double Data Rate Synchronous Dynamic Random Access Memory
  • Double Data Rate SDRAM Double Data Rate SDRAM
  • DDRSDRAM Double Data Rate Synchronous Dynamic Random Access Memory
  • Enhanced SDRAM Enhanced SDRAM, ESDRAM
  • Synchronous Link Dynamic Random Access Memory Synchronous Link Dynamic Random Access Memory
  • Synchlink DRAM Synchronous Link Dynamic Random Access Memory
  • SLDRAM Direct Rambus RAM
  • the memory 802 of the system and method described in the embodiments of the present application is intended to include, but is not limited to, these and any other suitable types of memory.
  • the memory 802 stores the following elements, executable modules or data structures, or their subsets, or their extended sets: operating system 8021 and application programs 8022.
  • the operating system 8021 includes various system programs, such as a framework layer, a core library layer, a driver layer, etc., for implementing various basic services and processing hardware-based tasks.
  • the application program 8022 includes various application programs, such as a media player (Media Player), a browser (Browser), etc., which are used to implement various application services.
  • the program for implementing the method of the embodiment of the present application may be included in the application 8022.
  • the terminal device 800 further includes: a computer program stored in the memory 802 and capable of running on the processor 801, and the computer program is executed by the processor 801 to implement the steps of the method 100 as follows.
  • the method disclosed in the foregoing embodiment of the present application may be applied to the processor 801 or implemented by the processor 801.
  • the processor 801 may be an integrated circuit chip with signal processing capabilities. In the implementation process, the steps of the foregoing method can be completed by an integrated logic circuit of hardware in the processor 801 or instructions in the form of software.
  • the aforementioned processor 801 may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other Programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor.
  • the software module may be located in a mature computer readable storage medium in the field, such as random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers.
  • the computer-readable storage medium is located in the memory 802, and the processor 801 reads information in the memory 802, and completes the steps of the foregoing method in combination with its hardware.
  • a computer program is stored on the computer-readable storage medium, and when the computer program is executed by the processor 801, each step of the above-mentioned method 100 embodiment is implemented.
  • the embodiments described in the embodiments of the present application may be implemented by hardware, software, firmware, middleware, microcode, or a combination thereof.
  • the processing unit can be implemented in one or more Application Specific Integrated Circuits (ASIC), Digital Signal Processing (DSP), Digital Signal Processing Equipment (DSP Device, DSPD), programmable Logic device (Programmable Logic Device, PLD), Field-Programmable Gate Array (Field-Programmable Gate Array, FPGA), general-purpose processors, controllers, microcontrollers, microprocessors, and those used to perform the functions described in this application Other electronic units or combinations thereof.
  • ASIC Application Specific Integrated Circuits
  • DSP Digital Signal Processing
  • DSP Device Digital Signal Processing Equipment
  • PLD programmable Logic Device
  • PLD Field-Programmable Gate Array
  • FPGA Field-Programmable Gate Array
  • the technology described in the embodiments of the present application can be implemented through modules (for example, procedures, functions, etc.) that execute the functions described in the embodiments of the present application.
  • the software codes can be stored in the memory and executed by the processor.
  • the memory can be implemented in the processor or external to the processor.
  • the terminal device 800 can implement the various processes implemented by the terminal device in the foregoing embodiments, and can achieve the same or equivalent technical effects. To avoid repetition, details are not described herein again.
  • FIG. 9 is a structural diagram of a network device applied in an embodiment of the present application, which can implement the details of the method embodiment 500 and achieve the same effect.
  • the network device 900 includes: a processor 901, a transceiver 902, a memory 903, and a bus interface, where:
  • the network device 900 further includes: a computer program stored in the memory 903 and capable of running on the processor 901, and the computer program is executed by the processor 901 to implement the steps of the method 500.
  • the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 901 and various circuits of the memory represented by the memory 903 are linked together.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, power management circuits, etc., which are all known in the art, and therefore, will not be further described herein.
  • the bus interface provides the interface.
  • the transceiver 902 may be a plurality of elements, that is, include a transmitter and a receiver, and provide a unit for communicating with various other devices on the transmission medium.
  • the processor 901 is responsible for managing the bus architecture and general processing, and the memory 903 can store data used by the processor 901 when performing operations.
  • the embodiment of the present application also provides a computer-readable storage medium on which a computer program is stored.
  • a computer program is stored.
  • the computer program is executed by a processor, each process of the above method embodiment 100 and method embodiment 500 is implemented and can To achieve the same technical effect, in order to avoid repetition, I will not repeat them here.
  • the computer readable storage medium such as read-only memory (Read-Only Memory, ROM for short), random access memory (Random Access Memory, RAM for short), magnetic disk or optical disk, etc.

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Abstract

本申请实施例公开了一种用于获取TA的方法和设备，用以解决处于空闲态或非激活态的终端设备无法获取TA的问题。所述方法由终端设备执行，包括：在随机接入过程中发送指示信息；其中，所述指示信息用于向网络设备指示所述终端设备通过所述随机接入过程获取TA。在本申请实施例提供的用于获取TA的方法，终端设备可以通过随机接入过程发送指示信息，该指示信息用于向网络设备指示终端设备发起随机接入过程的目是为了获取TA。这样，网络设备即可通过该随机接入过程发送TA，终端设备接收到TA并进行时间信息的计算，以满足时间精度的要求。

Description

用于获取定时提前量的方法和设备
相关申请的交叉引用
本申请要求享有于2019年6月27日提交的名称为“用于获取定时提前量的方法和设备”的中国专利申请201910570492.0的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本申请实施例涉及通信领域，尤其涉及一种用于获取定时提前量(Timing Advance，TA)的方法和设备。
背景技术
长期演进(Long Term Evolution，LTE)系统中，终端设备支持空闲态和连接态；新空口(New Radio，NR)系统中，终端设备支持空闲态、非激活态和连接态。相关技术中，终端设备可能会有时间精度的要求，此时，终端设备可以通过接收网络设备发送的TA进行时间校正以满足时间精度要求。然而，处于非连接态(包括上述空闲态或非激活态)的终端设备无法获取得到TA。
发明内容
本申请实施例的目的是提供一种用于获取TA的方法和设备，用以解决处于空闲态或非激活态的终端设备无法获取TA的问题。
第一方面，提供了一种用于获取TA的方法，所述方法由终端设备执行，所述方法包括：
在随机接入过程中发送指示信息；
其中，所述指示信息用于向网络设备指示所述终端设备通过所述随机接入过程获取TA。
第二方面，提供了一种用于获取TA的方法，所述方法由网络设备执行，所述方法包括：
在随机接入过程中接收指示信息；
其中，所述指示信息用于向网络设备指示终端设备通过所述随机接入过程获取TA。
第三方面，提供了一种终端设备，该终端设备包括：
发送单元，用于在随机接入过程中发送指示信息；
其中，所述指示信息用于向网络设备指示所述终端设备通过所述随机接入过程获取TA
第四方面，提供了一种网络设备，该网络设备包括：
接收单元，用于在随机接入过程中接收指示信息；
其中，所述指示信息用于向网络设备指示终端设备通过所述随机接入过程获取TA。
第五方面，提供了一种终端设备，该终端设备包括处理器、存储器及存储在所述存储器上并可在所述处理器上运行的计算机程序，所述计算机程序被所述处理器执行时实现如第一方面所述的用于获取TA的方法的步骤。
第六方面，提供了一种网络设备，该网络设备包括处理器、存储器及存储在所述存储器上并可在所述处理器上运行的计算机程序，所述计算机程序被所述处理器执行时实现如第二方面所述的用于获取TA的方法的步骤。
第七方面，提供了一种计算机可读存储介质，所述计算机可读存储介质上存储计算机程序，所述计算机程序被处理器执行时实现如第一方面和第二方面所述的用于获取TA的方法的步骤。
在本申请实施例中，终端设备可以通过随机接入过程发送指示信息，该指示信息用于向网络设备指示终端设备发起随机接入过程的目是为了获取TA。这样，网络设备即可通过该随机接入过程发送TA，终端设备接收到TA并进行时间信息的计算，以满足时间精度的要求。
附图说明
此处所说明的附图用来提供对本申请的进一步理解，构成本申请的一部分，本申请的示意性实施例及其说明用于解释本申请，并不构成对本申请的不当限定。在附图中：
图1是根据本申请一个实施例的用于获取TA的方法示意性流程图；
图2是根据本申请一个实施例的用于获取TA的方法中MAC层包格式示意图；
图3是根据图2所示实施例的用于获取TA的方法中MAC CE的子头格式示意图；
图4是根据图2所示实施例的用于获取TA的方法中MAC CE格式示意图；
图5是根据本申请另一个实施例的用于获取TA的方法示意性流程图；
图6是根据本申请一个实施例的终端设备的结构示意图；
图7是根据本申请一个实施例的网络设备的结构示意图；
图8是根据本申请另一个实施例的终端设备的结构示意图；
图9是根据本申请另一个实施例的网络设备的结构示意图。
具体实施方式
为使本申请的目的、技术方案和优点更加清楚，下面将结合本申请具体实施例及相应的附图对本申请技术方案进行清楚、完整地描述。显然，所描述的实施例仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。本申请各个实施例中的和/或表示前后两者的至少之一。
应理解，本申请实施例的技术方案可以应用于各种通信系统，例如：长期演进(Long Term Evolution，LTE)系统、LTE频分双工(Frequency Division Duplex，FDD)系统、LTE时分双工(Time Division Duplex，TDD)、通用移动通信系统(Universal Mobile Telecommunication  System，UMTS)或全球互联微波接入(Worldwide Interoperability for Microwave Access，WiMAX)通信系统、5G系统，或者说新无线(New Radio，NR)系统，或者为后续演进通信系统。
在本申请实施例中，终端设备可以包括但不限于移动台(Mobile Station，MS)、移动终端(Mobile Terminal)、移动电话(Mobile Telephone)、用户设备(User Equipment，UE)、手机(handset)及便携设备(portable equipment)、车辆(vehicle)等，该终端设备可以经无线接入网(Radio Access Network，RAN)与一个或多个核心网进行通信，例如，终端设备可以是移动电话(或称为“蜂窝”电话)、具有无线通信功能的计算机等，终端设备还可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置。
本申请实施例中，网络设备是一种部署在无线接入网中用以为终端设备提供无线通信功能的装置。所述网络设备可以为基站，所述基站可以包括各种形式的宏基站，微基站，中继站，接入点等。在采用不同的无线接入技术的系统中，具有基站功能的设备的名称可能会有所不同。例如在LTE网络中，称为演进的节点B(Evolved NodeB，eNB或eNodeB)，在第三代(3rd Generation，3G)网络中，称为节点B(Node B)，或者后续演进通信系统中的网络设备等等，然用词并不构成限制。
如图1所示，本申请的一个实施例提供一种用于获取TA的方法100，该方法可以由终端设备执行，包括如下步骤：
S102：在随机接入过程中发送指示信息，该指示信息用于向网络设备指示终端设备通过随机接入过程获取TA。
本申请实施例中，处于非连接态的终端设备可以发起随机接入过程，然后在随机接入过程中向网络设备发送指示信息，进而使网络设备确定出终端设备发起随机接入的目的是为了获取TA，这样，网络设备即可基于终端设备在随机接入过程中发送的上行消息计算得到TA并发送给终端设备。具体例如，网络设备通过测量终端设备发送的preamble序列来计算TA，并通过RAR的Timing Advance Command字段发送给终端设备。
通常情况下，处于非连接态的终端设备发起随机接入的目的是为了进 入连接态，该实施例中，处于非连接态的终端设备发起随机接入过程仅仅是为了获取TA，而并非为了进入连接态，因此，终端设备在随机接入过程中发送指示信息，该指示信息可以指示终端设备发起随机接入过程的目的仅仅是为了获取TA。
可选地，终端设备还可以在上述随机接入过程中接收TA，以进行时间信息的计算，具体可以是进行时间校正，满足时间精度的要求。
该实施例对于上述接收TA和发送指示信息的先后顺序不作具体限定，可以是在随机接入过程中先发送指示信息，后续接收TA，也可以是在随机接入过程中先接收TA，后续发送指示信息。
可选地，该实施例执行之前，处于非连接态的终端设备需要获取TA时，终端设备还可以发起上述随机接入过程，即随机接入过程的触发条件为：非连接态的终端设备为了获取TA。
本申请各个实施例中提到的非连接态，可以是终端设备的连接态(Connected)之外的状态，具体例如，在LTE系统中，非连接态包括空闲态(Idle)；在NR系统中，非连接态包括非激活态(Inactive)和空闲态。当然，在后续演进系统中，非连接态还可以包括空闲态和非激活态之外的其它状态。
本申请实施例提供的用于获取TA的方法，终端设备可以通过随机接入过程发送指示信息，该指示信息用于向网络设备指示终端设备发起随机接入过程的目是为了获取TA。这样，网络设备即可通过该随机接入过程发送TA，终端设备接收到TA并进行时间信息的计算，以满足时间精度的要求。
本申请各个实施例中提到的终端设备进行时间信息的计算，具体可以是基于下行信息中指示的时间信息进行时间校正/校准。
可选地，上述指示信息还可以用于向网络设备指示终端设备在随机接入过程结束之后不进入连接态，也即发起随机接入过程的目的仅仅是为了获取TA，终端设备期望维持发起随机接入过程之前的无线资源控制(Radio Resource Control，RRC)状态，而不期望进入连接态。这样，终端设备即可通过该随机接入过程获取得到TA，并维持之前的非连接态， 减少功耗。
为详细说明本申请实施例提供的用于获取TA的方法，以下将结合几个具体的实施例进行说明。
实施例一
步骤1：终端设备接收物理随机接入信道(Physical Random Access Channel，PRACH)配置信息。
在PRACH配置信息中，网络设备指示某些专用(或称目标)PRACH资源(包括PRACH时频资源和/或Preamble资源)预留用非连接态的终端设备获取TA且不会引起RRC状态变迁。
这样，终端设备通过上述专用PRACH资源发起随机接入，网络设备即可确定出终端设备发起该随机接入的目的仅仅是为了获取TA，而不期望在随机接入过程结束之后进入连接态。
步骤2：终端设备发送MSG1。
具体地，终端设备根据步骤1中获得的配置发送MSG1。
在一种实施方式中，终端设备发送专用(或称目标)随机接入前导preamble序列，该专用随机接入前导preamble序列指示终端设备通过随机接入过程获取TA，且在随机接入过程结束之后不进入连接态。
在一种实施方式中，终端设备在专用PRACH资源上发送preamble序列，该专用PRACH资源上发送的preamble序列指示终端设备通过随机接入过程获取TA，且在随机接入过程结束之后不进入连接态。
在另一种实施方式中，终端设备在专用PRACH资源上发送的专用preamble序列，该专用PRACH资源上发送的专用preamble序列指示终端设备通过随机接入过程获取TA，且在随机接入过程结束之后不进入连接态。
步骤3：终端设备接收MSG2。
在MSG2中携带有TA信息，当然，在MSG2中还携带UL grant信息，用于终端设备发送MSG3。
步骤4：终端设备在MSG2分配的UL grant资源上发送MSG3。
其中，MSG3包括第一校验信息，第一校验信息包括终端设备的标识 信息和/或随机数。
步骤5：终端设备接收第二校验信息，并在第二校验信息与第一校验信息一致的情况下，基于步骤2中接收到的TA进行时间信息的计算，具体可以是进行时间校正。
具体例如，网络设备发送的下行信息中指示的时间为T，则终端设备接收到该下行信息的准确时间应该为T+TA/2。
可选地，若第二校验信息与第一校验信息不一致，终端设备还可以丢弃步骤2中接收到的TA，并重新发起随机接入过程以获取TA。
该实施例通过专用PRACH资源向网络设备指示，指示终端设备发起随机接入过程的目的仅仅是为了获取TA，而不期望进入连接态。终端设备通过该随机接入过程获取得到TA进行时间信息的计算，并维持之前的非连接态，减少功耗。
该实施例通过发送第一校验信息及接收第二校验信息，并在第二校验信息与第一校验信息一致的情况下，基于接收到的TA进行时间信息的计算，避免多个终端设备使用相同的专用PRACH资源发起随机接入过程而无法获取到准确的TA的问题，提高获取到的TA的可靠性。
实施例二
步骤1：终端设备生成RRC连接建立请求消息。
其中，该RRC连接建立请求消息包括指示信息，该指示信息用于向网络设备指示终端设备通过随机接入过程获取TA，并在随机接入过程结束之后不进入连接态。
可选地，上述指示信息可以使用新引入指示信息元素IE；还可以是重用已有IE，如：定义新的RRC连接建立cause值。
步骤2：终端设备发送MSG1。
终端设备发送的MSG1具体可以是preamble序列。
步骤3：终端设备接收MSG2。
该步骤中的MSG2即随机接入响应消息，随机接入响应消息包括TA。
步骤4：终端设备发送MSG3。
终端设备发送的MSG3包括步骤1中生成的RRC连接建立请求消息。
步骤5：终端设备接收RRC连接拒绝消息。
其中，RRC连接拒绝消息是网络设备基于RRC连接建立请求消息中的指示信息发送的。
该实施例在RRC连接建立请求消息中携带指示信息，向网络设备指示终端设备发起随机接入过程的目的仅仅是为了获取TA，而不期望进入连接态。这样，终端设备通过该随机接入过程获取得到TA进行时间信息的计算，并维持之前的非连接态，减少功耗。
可选地，该实施例中的RRC连接建立请求消息也可以为RRC连接恢复请求消息。
该实施例通过重用已有的RRC连接建立请求消息/RRC连接恢复请求消息，无需新定义新的RRC消息，便于降低相关的设备实现复杂度。
可选地，上述步骤4发送的RRC连接建立请求消息包括第一校验信息，第一校验信息包括终端设备的标识信息和/或随机数，步骤5接收到的RRC连接拒绝消息包括有第二校验信息，接收RRC连接拒绝消息之后，该方法还包括如下步骤：在第二校验信息与第一校验信息一致的情况下，基于TA进行时间信息的计算。
该实施例在第二校验信息与第一校验信息一致的情况下基于接收到的TA进行时间信息的计算，避免多个终端设备使用相同的专用PRACH资源发起随机接入过程而无法获取到准确的TA的问题，提高获取到的TA的可靠性。
实施例三
步骤1：终端设备生成RRC消息。
该实施例中的RRC消息不同于实施例二中的RRC连接建立请求消息/RRC连接恢复请求消息，
该RRC消息可以是新定义的，该RRC消息可以仅携带上述指示信息，而无需携带其他的多余信息，携带的信息量少，便于节约信令开销。
步骤2：终端设备发送MSG1。
具体地，终端设备发送的MSG1具体可以是preamble序列。
步骤3：终端设备接收MSG2。
该步骤中的MSG2即随机接入响应消息，随机接入响应消息包括TA。
步骤4：终端设备发送MSG3。
终端设备发送的MSG3包括步骤1中生成的RRC消息。
该实施例在RRC消息中携带指示信息，向网络设备指示终端设备发起随机接入过程的目的仅仅是为了获取TA，而不期望进入连接态。这样，终端设备通过该随机接入过程获取得到TA进行时间信息的计算，并维持之前的非连接态，减少功耗。
该实施例通过定义新的RRC消息，该RRC消息可以仅携带上述指示信息，便于节约信令开销。
可选地，上述步骤4发送的RRC消息包括第一校验信息，第一校验信息包括终端设备的标识信息和/或随机数，该实施例还可以包括步骤5，即接收第二校验信息，在第二校验信息与第一校验信息一致的情况下，基于TA进行时间信息的计算。
该实施例在第二校验信息与第一校验信息一致的情况下基于接收到的TA进行时间信息的计算，避免多个终端设备使用相同的专用PRACH资源发起随机接入过程而无法获取到准确的TA的问题，提高获取到的TA的可靠性。
实施例四
步骤1：终端设备发送MSG1。
步骤2：终端设备设备接收MSG2。
在MSG2中携带有TA信息，当然，在MSG2中还携带UL grant信息，用于终端设备发送MSG3。
步骤3：终端设备在MSG2分配的UL grant资源上发送MSG3。
MAG3中用新定义的媒体接入控制控制单元(Media Access Control Control Element，MAC CE)。该MAC CE用于向网络设备指示本随机接入仅用于获取TA。MSG3中还携带终端设备的标识信息和/或随机数。终 端设备的标识信息和/或随机数可以携带在上述新的MAC CE中。
该实施例中的MAC CE包含于MAC PDU中(或者是MAC sub PDU)，MAC PDU的格式可以参见图2，MAC PDU包括MAC CE和该MAC CE对应的子头。
关于MAC CE对应的子头和MAC CE的格式可以参见图3和图4，其中，在图3的子头中包括有R域、F域、LCID域和L域；其中，LCID域用于指示上述MAC CE的类型/目的，即用于获取TA；上述R域为预留比特位，通常设为“0”；上述F域可以用来指示对应的媒体接入控制协议数据单元(Media Access Control Protocol Data Unit，MAC PDU)的长度；上述L域可以用来指示对应的MAC PDU的字节数。图4中的MAC CE携带有竞争解决标识(终端设备标识信息的一种)。
步骤4：终端设备接收MSG3中携带的终端设备的标识信息和/或随机数。终端设备确认与步骤3中自己所发的一致后，使用步骤3中获得的TA计算对网络设备发送的精确时间进行校正。
该实施例通过MAC CE向网络设备指示发起随机接入过程的目的仅仅是为了获取TA，而不期望进入连接态。这样，终端设备通过该随机接入过程获取得到TA进行时间信息的计算，并维持之前的非连接态，减少功耗。
上述多个实施例中，网络设备可以基于MSG3的接收，再计算一个TA并携带在MSG4中发送给终端设备。避免因仅根据MSG1计算TA获得的值(在MSG2中携带的TA值)不准确，提高终端设备得到的TA的可靠度。
以上结合图1详细描述了根据本申请实施例的用于获取TA的方法。下面将结合图5详细描述根据本申请另一实施例的用于获取TA的方法。可以理解的是，从网络设备侧描述的网络设备与终端设备的交互与图1所示的方法中的终端设备侧的描述相同，为避免重复，适当省略相关描述。
图5是本申请实施例的用于获取TA的方法实现流程示意图，可以应用在网络设备侧。如图5所示，该方法500包括：
S502：在随机接入过程中接收指示信息，该指示信息用于向网络设备 指示终端设备通过随机接入过程获取TA。
在本申请实施例中，网络设备在随机接入过程中接收指示信息，该指示信息可以用来向网络设备指示终端设备发起随机接入过程的目的是为了获取TA，这样，网络设备即可在该随机接入过程中发送TA，终端设备可以接收TA并进行时间信息的计算，以满足时间精度的要求。
可选地，作为一个实施例，指示信息还用于向网络设备指示终端设备在随机接入过程结束之后不进入连接态。
可选地，作为一个实施例，指示信息包括：
目标preamble序列；或，在目标PRACH资源上接收的目标preamble序列。
可选地，作为一个实施例，在随机接入过程中接收指示信息之后，该方法还包括：
发送随机接入响应消息，随机接入响应消息包括TA；
接收第一校验信息，第一校验信息包括终端设备的标识信息和/或随机数；
发送第二校验信息，以便终端设备在第二校验信息与第一校验信息一致的情况下，基于TA进行时间信息的计算。
可选地，作为一个实施例，在随机接入过程中接收指示信息之前，该方法还包括：
发送配置信息；
其中，配置信息用于指示目标preamble序列；或，配置信息用于指示目标PRACH资源和目标preamble序列。
可选地，作为一个实施例，在随机接入过程中接收指示信息包括：
接收无线资源控制RRC消息，RRC消息包括指示信息。
可选地，作为一个实施例，接收RRC消息之前，该方法还包括：
接收preamble序列；
发送随机接入响应消息，随机接入响应消息包括TA；
接收发送RRC消息之后，方法还包括：
基于指示信息发送RRC连接拒绝消息。
可选地，作为一个实施例，RRC消息包括第一校验信息，第一校验信息包括终端设备的标识信息和/或随机数，RRC连接拒绝消息包括有第二校验信息，第二校验信息用于终端设备在第二校验信息与第一校验信息一致的情况下，基于TA进行时间信息的计算。
可选地，作为一个实施例，RRC消息包括：
RRC连接建立请求消息；或，RRC连接恢复请求消息；或，新定义的RRC消息。
可选地，作为一个实施例，在随机接入过程中接收指示信息包括：
在随机接入过程中接收MAC CE。
可选地，作为一个实施例，在随机接入过程中接收MAC CE之前，该方法还包括：
接收preamble序列；
发送随机接入响应消息，随机接入响应消息包括TA。
可选地，作为一个实施例，MAC CE包括有第一校验信息，第一校验信息包括终端设备的标识信息和/或随机数，在随机接入过程中接收MAC CE之后，该方法还包括：
发送第二校验信息，第二校验信息用于终端设备在第二校验信息与第一校验信息一致的情况下，基于TA进行时间信息的计算。
可选地，作为一个实施例，该方法还包括：
在随机接入过程中发送TA，使得终端设备基于TA进行时间信息的计算。
可选地，作为一个实施例，TA包括第一TA和第二TA，第一TA和第二TA是基于不同的上行消息分别计算得到的。
以上结合图1至图5详细描述了根据本申请实施例的用于获取TA的方法。下面将结合图6详细描述根据本申请实施例的终端设备。
图6是根据本申请实施例的终端设备的结构示意图。如图6所示，终端设备600包括：
发送单元602，可以用于在随机接入过程中发送指示信息；
其中，指示信息用于向网络设备指示终端设备通过随机接入过程获取 TA。
在本申请实施例中，终端设备可以通过随机接入过程发送指示信息，该指示信息用于向网络设备指示终端设备发起随机接入过程的目是为了获取TA。这样，网络设备即可通过该随机接入过程发送TA，终端设备接收到TA并进行时间信息的计算，以满足时间精度的要求。
可选地，作为一个实施例，指示信息还用于向网络设备指示终端设备在随机接入过程结束之后不进入连接态。
可选地，作为一个实施例，指示信息包括：
目标preamble序列；或，在目标物理随机接入信道PRACH资源上发送的目标preamble序列。
可选地，作为一个实施例，终端设备600还包括：接收单元，其中，
接收单元可以用于接收随机接入响应消息，随机接入响应消息包括TA；
发送单元602，还可以用于发送第一校验信息，第一校验信息包括终端设备的标识信息和/或随机数；
接收单元还可以用于接收第二校验信息，并在第二校验信息与第一校验信息一致的情况下，基于TA进行时间信息的计算。
可选地，作为一个实施例，终端设备600还包括：接收单元，可以用于接收配置信息；
其中，配置信息用于指示目标preamble序列；或，配置信息用于指示目标PRACH资源和目标preamble序列。
可选地，作为一个实施例，发送单元602，可以用于发送无线资源控制RRC消息，RRC消息包括指示信息。
可选地，作为一个实施例，发送单元602，还可以用于发送preamble序列；终端设备600还包括：接收单元，可以用于接收随机接入响应消息，随机接入响应消息包括TA；以及接收RRC连接拒绝消息；其中，RRC连接拒绝消息是网络设备基于指示信息发送的。
可选地，作为一个实施例，RRC消息包括第一校验信息，第一校验信息包括终端设备的标识信息和/或随机数，RRC连接拒绝消息包括有第二 校验信息，接收RRC连接拒绝消息之后，接收单元，还可以用于在第二校验信息与第一校验信息一致的情况下，基于TA进行时间信息的计算。
可选地，作为一个实施例，RRC消息包括：
RRC连接建立请求消息；或，RRC连接恢复请求消息；或，新定义的RRC消息。
可选地，作为一个实施例，发送单元602，可以用于在随机接入过程中发送媒体接入控制控制单元MAC CE。
可选地，作为一个实施例，发送单元602，可以用于发送preamble序列；终端设备600还包括：接收单元，可以用于接收随机接入响应消息，随机接入响应消息包括TA。
可选地，作为一个实施例，MAC CE包括有第一校验信息，第一校验信息包括终端设备的标识信息和/或随机数，终端设备600还包括：接收单元，可以用于接收第二校验信息，并在第二校验信息与第一校验信息一致的情况下，基于TA进行时间信息的计算。
可选地，作为一个实施例，终端设备600还包括：接收单元，可以用于在随机接入过程中接收TA；基于TA进行时间信息的计算。
可选地，作为一个实施例，TA包括第一TA和第二TA，第一TA和第二TA是网络设备基于不同的上行消息分别计算得到的。
可选地，作为一个实施例，发送单元602，还可以用于发起随机接入过程；其中，随机接入过程用于获取TA。
根据本申请实施例的终端设备600可以参照对应本申请实施例的方法100的流程，并且，该终端设备600中的各个单元/模块和上述其他操作和/或功能分别为了实现方法100中的相应流程，并且能够达到相同或等同的技术效果，为了简洁，在此不再赘述。
图7是根据本申请实施例的网络设备的结构示意图。如图7所示，网络设备700包括：
接收单元702，可以用于在随机接入过程中接收指示信息；
其中，指示信息用于向网络设备指示终端设备通过随机接入过程获取TA。
在本申请实施例中，网络设备在随机接入过程中接收指示信息，该指示信息可以用来向网络设备指示终端设备发起随机接入过程的目的是为了获取TA，这样，网络设备即可在该随机接入过程中发送TA，终端设备可以接收TA并进行时间信息的计算，以满足时间精度的要求。
可选地，作为一个实施例，指示信息还用于向网络设备指示终端设备在随机接入过程结束之后不进入连接态。
可选地，作为一个实施例，指示信息包括：
目标preamble序列；或，在目标PRACH资源上接收的目标preamble序列。
可选地，作为一个实施例，网络设备700还包括发送单元，其中
发送单元可以用于发送随机接入响应消息，随机接入响应消息包括TA；
接收单元702，还可以用于接收第一校验信息，第一校验信息包括终端设备的标识信息和/或随机数；
发送单元可以用于发送第二校验信息，以便终端设备在第二校验信息与第一校验信息一致的情况下，基于TA进行时间信息的计算。
可选地，作为一个实施例，网络设备700还包括发送单元，可以用于发送配置信息；
其中，配置信息用于指示目标preamble序列；或，配置信息用于指示目标PRACH资源和目标preamble序列。
可选地，作为一个实施例，接收单元702，可以用于接收无线资源控制RRC消息，RRC消息包括指示信息。
可选地，作为一个实施例，接收单元702，还可以用于接收preamble序列；网络设备700还包括发送单元，可以用于发送随机接入响应消息，随机接入响应消息包括TA；以及，基于指示信息发送RRC连接拒绝消息。
可选地，作为一个实施例，RRC消息包括第一校验信息，第一校验信息包括终端设备的标识信息和/或随机数，RRC连接拒绝消息包括有第二校验信息，第二校验信息用于终端设备在第二校验信息与第一校验信息一 致的情况下，基于TA进行时间信息的计算。
可选地，作为一个实施例，RRC消息包括：
RRC连接建立请求消息；或，RRC连接恢复请求消息；或，新定义的RRC消息。
可选地，作为一个实施例，接收单元702，可以用于在随机接入过程中接收MAC CE。
可选地，作为一个实施例，接收单元702，还可以用于接收preamble序列；网络设备700还包括发送单元，可以用于发送随机接入响应消息，随机接入响应消息包括TA。
可选地，作为一个实施例，MAC CE包括有第一校验信息，第一校验信息包括终端设备的标识信息和/或随机数，网络设备700还包括发送单元，可以用于发送第二校验信息，第二校验信息用于终端设备在第二校验信息与第一校验信息一致的情况下，基于TA进行时间信息的计算。
可选地，作为一个实施例，网络设备700还包括发送单元，可以用于在随机接入过程中发送TA，使得终端设备基于TA进行时间信息的计算。
可选地，作为一个实施例，TA包括第一TA和第二TA，第一TA和第二TA是基于不同的上行消息分别计算得到的。
根据本申请实施例的网络设备700可以参照对应本申请实施例的方法500的流程，并且，该网络设备700中的各个单元/模块和上述其他操作和/或功能分别为了实现方法500中的相应流程，并且能够达到相同或等同的技术效果，为了简洁，在此不再赘述。
图8是本申请另一个实施例的终端设备的框图。图8所示的终端设备800包括：至少一个处理器801、存储器802、至少一个网络接口804和用户接口803。终端设备800中的各个组件通过总线系统805耦合在一起。可理解，总线系统805用于实现这些组件之间的连接通信。总线系统805除包括数据总线之外，还包括电源总线、控制总线和状态信号总线。但是为了清楚说明起见，在图8中将各种总线都标为总线系统805。
其中，用户接口803可以包括显示器、键盘、点击设备(例如，鼠标，轨迹球(trackball))、触感板或者触摸屏等。
可以理解，本申请实施例中的存储器802可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(Read-Only Memory，ROM)、可编程只读存储器(Programmable ROM，PROM)、可擦除可编程只读存储器(Erasable PROM，EPROM)、电可擦除可编程只读存储器(Electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(Random Access Memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(Static RAM，SRAM)、动态随机存取存储器(Dynamic RAM，DRAM)、同步动态随机存取存储器(Synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM，DDRSDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(Synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM，DRRAM)。本申请实施例描述的系统和方法的存储器802旨在包括但不限于这些和任意其它适合类型的存储器。
在一些实施方式中，存储器802存储了如下的元素，可执行模块或者数据结构，或者他们的子集，或者他们的扩展集：操作系统8021和应用程序8022。
其中，操作系统8021，包含各种系统程序，例如框架层、核心库层、驱动层等，用于实现各种基础业务以及处理基于硬件的任务。应用程序8022，包含各种应用程序，例如媒体播放器(Media Player)、浏览器(Browser)等，用于实现各种应用业务。实现本申请实施例方法的程序可以包含在应用程序8022中。
在本申请实施例中，终端设备800还包括：存储在存储器上802并可在处理器801上运行的计算机程序，计算机程序被处理器801执行时实现如下方法100的步骤。
上述本申请实施例揭示的方法可以应用于处理器801中，或者由处理器801实现。处理器801可能是一种集成电路芯片，具有信号的处理能 力。在实现过程中，上述方法的各步骤可以通过处理器801中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器801可以是通用处理器、数字信号处理器(Digital Signal Processor，DSP)、专用集成电路(Application Specific Integrated Circuit，ASIC)、现场可编程门阵列(Field Programmable Gate Array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的计算机可读存储介质中。该计算机可读存储介质位于存储器802，处理器801读取存储器802中的信息，结合其硬件完成上述方法的步骤。具体地，该计算机可读存储介质上存储有计算机程序，计算机程序被处理器801执行时实现如上述方法100实施例的各步骤。
可以理解的是，本申请实施例描述的这些实施例可以用硬件、软件、固件、中间件、微码或其组合来实现。对于硬件实现，处理单元可以实现在一个或多个专用集成电路(Application Specific Integrated Circuits，ASIC)、数字信号处理器(Digital Signal Processing，DSP)、数字信号处理设备(DSP Device，DSPD)、可编程逻辑设备(Programmable Logic Device，PLD)、现场可编程门阵列(Field-Programmable Gate Array，FPGA)、通用处理器、控制器、微控制器、微处理器、用于执行本申请所叙述的功能的其它电子单元或其组合中。
对于软件实现，可通过执行本申请实施例所叙述的功能的模块(例如过程、函数等)来实现本申请实施例所叙述的的技术。软件代码可存储在存储器中并通过处理器执行。存储器可以在处理器中或在处理器外部实现。
终端设备800能够实现前述实施例中终端设备实现的各个过程，并且能够达到相同或等同的技术效果，为避免重复，这里不再赘述。
请参阅图9，图9是本申请实施例应用的网络设备的结构图，能够实现方法实施例500的细节，并达到相同的效果。如图9所示，网络设备900包括：处理器901、收发机902、存储器903和总线接口，其中：
在本申请实施例中，网络设备900还包括：存储在存储器上903并可在处理器901上运行的计算机程序，计算机程序被处理器901、执行时实现方法500的步骤。
在图9中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器901代表的一个或多个处理器和存储器903代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机902可以是多个元件，即包括发送机和接收机，提供用于在传输介质上与各种其他装置通信的单元。
处理器901负责管理总线架构和通常的处理，存储器903可以存储处理器901在执行操作时所使用的数据。
本申请实施例还提供一种计算机可读存储介质，计算机可读存储介质上存储有计算机程序，该计算机程序被处理器执行时实现上述方法实施例100和方法实施例500的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。其中，所述的计算机可读存储介质，如只读存储器(Read-Only Memory，简称ROM)、随机存取存储器(Random Access Memory，简称RAM)、磁碟或者光盘等。
需要说明的是，在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者装置不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者装置所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者装置中还存在另外的相同要素。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到上述实施例方法可借助软件加必需的通用硬件平台的方式来实现，当然也可 以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本申请的技术方案本质上或者说对相关技术做出贡献的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(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端(可以是手机，计算机，服务器，空调器，或者网络设备等)执行本申请各个实施例的方法。
上面结合附图对本申请的实施例进行了描述，但是本申请并不局限于上述的具体实施方式，上述的具体实施方式仅仅是示意性的，而不是限制性的，本领域的普通技术人员在本申请的启示下，在不脱离本申请宗旨和权利要求所保护的范围情况下，还可做出很多形式，均属于本申请的保护之内。

Claims (34)

  1. 一种用于获取定时提前量TA的方法，所述方法由终端设备执行，所述方法包括：
    在随机接入过程中发送指示信息；
    其中，所述指示信息用于向网络设备指示所述终端设备通过所述随机接入过程获取TA。
  2. 如权利要求1所述的方法，其中，所述指示信息还用于向网络设备指示所述终端设备在所述随机接入过程结束之后不进入连接态。
  3. 如权利要求1或2所述的方法，其中，所述指示信息包括：
    目标随机接入前导preamble序列；
    或，
    在目标物理随机接入信道PRACH资源上发送的目标preamble序列。
  4. 如权利要求3所述的方法，其中，所述在随机接入过程中发送指示信息之后，所述方法还包括：
    接收随机接入响应消息，所述随机接入响应消息包括TA；
    发送第一校验信息，所述第一校验信息包括所述终端设备的标识信息和/或随机数；
    接收第二校验信息，并在所述第二校验信息与所述第一校验信息一致的情况下，基于所述TA进行时间信息的计算。
  5. 如权利要求3所述的方法，其中，所述在随机接入过程中发送指示信息之前，所述方法还包括：
    接收配置信息；
    其中，所述配置信息用于指示所述目标preamble序列；或，所述配置信息用于指示所述目标PRACH资源和所述目标preamble序列。
  6. 如权利要求1或2所述的方法，其中，所述在随机接入过程中发送指示信息包括：
    发送无线资源控制RRC消息，所述RRC消息包括所述指示信息。
  7. 如权利要求6所述的方法，其中，所述发送RRC消息之前，所述 方法还包括：
    发送preamble序列；
    接收随机接入响应消息，所述随机接入响应消息包括TA；
    所述发送RRC消息之后，所述方法还包括：
    接收RRC连接拒绝消息；其中，所述RRC连接拒绝消息是网络设备基于所述指示信息发送的。
  8. 如权利要求7所述的方法，其中，所述RRC消息包括第一校验信息，所述第一校验信息包括所述终端设备的标识信息和/或随机数，所述RRC连接拒绝消息包括第二校验信息，所述接收RRC连接拒绝消息之后，所述方法还包括：
    在所述第二校验信息与所述第一校验信息一致的情况下，基于所述TA进行时间信息的计算。
  9. 如权利要求6所述的方法，其中，所述RRC消息包括：
    RRC连接建立请求消息；
    或，
    RRC连接恢复请求消息；
    或，
    新定义的RRC消息。
  10. 如权利要求1或2所述的方法，其中，所述在随机接入过程中发送指示信息包括：
    在随机接入过程中发送媒体接入控制控制单元MAC CE。
  11. 如权利要求10所述的方法，其中，所述发送MAC CE之前，所述方法还包括：
    发送preamble序列；
    接收随机接入响应消息，所述随机接入响应消息包括TA。
  12. 如权利要求10所述的方法，其中，所述MAC CE包括第一校验信息，所述第一校验信息包括所述终端设备的标识信息和/或随机数；所述在随机接入过程中发送发送MAC CE之后，所述方法还包括：
    接收第二校验信息，并在所述第二校验信息与所述第一校验信息一致 的情况下，基于所述TA进行时间信息的计算。
  13. 如权利要求1或2所述的方法，其中，所述方法还包括：
    在所述随机接入过程中接收TA；
    基于所述TA进行时间信息的计算。
  14. 如权利要求13所述的方法，其中，
    所述TA包括第一TA和第二TA，所述第一TA和所述第二TA是网络设备基于不同的上行消息分别计算得到的。
  15. 如权利要求1或2所述的方法，其中，所述在随机接入过程中发送指示信息之前，所述方法还包括：
    发起所述随机接入过程；
    其中，所述随机接入过程用于获取TA。
  16. 一种用于获取TA的方法，所述方法由网络设备执行，所述方法包括：
    在随机接入过程中接收指示信息；
    其中，所述指示信息用于向网络设备指示终端设备通过所述随机接入过程获取TA。
  17. 如权利要求16所述的方法，其中，所述指示信息还用于向网络设备指示所述终端设备在所述随机接入过程结束之后不进入连接态。
  18. 如权利要求16或17所述的方法，其中，所述指示信息包括：
    目标preamble序列；
    或，
    在目标PRACH资源上接收的目标preamble序列。
  19. 如权利要求18所述的方法，其中，所述在随机接入过程中接收指示信息之后，所述方法还包括：
    发送随机接入响应消息，所述随机接入响应消息包括TA；
    接收第一校验信息，所述第一校验信息包括所述终端设备的标识信息和/或随机数；
    发送第二校验信息，以便所述终端设备在所述第二校验信息与所述第一校验信息一致的情况下，基于所述TA进行时间信息的计算。
  20. 如权利要求18所述的方法，其中，所述在随机接入过程中接收指示信息之前，所述方法还包括：
    发送配置信息；
    其中，所述配置信息用于指示所述目标preamble序列；或，所述配置信息用于指示所述目标PRACH资源和所述目标preamble序列。
  21. 如权利要求16或17所述的方法，其中，所述在随机接入过程中接收指示信息包括：
    接收无线资源控制RRC消息，所述RRC消息包括所述指示信息。
  22. 如权利要求21所述的方法，其中，所述接收RRC消息之前，所述方法还包括：
    接收preamble序列；
    发送随机接入响应消息，所述随机接入响应消息包括TA；
    所述接收发送RRC消息之后，所述方法还包括：
    基于所述指示信息发送RRC连接拒绝消息。
  23. 如权利要求22所述的方法，其中，所述RRC消息包括第一校验信息，所述第一校验信息包括所述终端设备的标识信息和/或随机数，所述RRC连接拒绝消息包括有第二校验信息，所述第二校验信息用于所述终端设备在所述第二校验信息与所述第一校验信息一致的情况下，基于所述TA进行时间信息的计算。
  24. 如权利要求21所述的方法，其中，所述RRC消息包括：
    RRC连接建立请求消息；
    或，
    RRC连接恢复请求消息；
    或，
    新定义的RRC消息。
  25. 如权利要求16所述的方法，其中，所述在随机接入过程中接收指示信息包括：
    在所述随机接入过程中接收MAC CE。
  26. 如权利要求25所述的方法，其中，所述在所述随机接入过程中 接收MAC CE之前，所述方法还包括：
    接收preamble序列；
    发送随机接入响应消息，所述随机接入响应消息包括TA。
  27. 如权利要求25所述的方法，其中，所述MAC CE包括第一校验信息，所述第一校验信息包括所述终端设备的标识信息和/或随机数；所述在所述随机接入过程中接收MAC CE之后，所述方法还包括：
    发送第二校验信息，所述第二校验信息用于所述终端设备在所述第二校验信息与所述第一校验信息一致的情况下，基于所述TA进行时间信息的计算。
  28. 如权利要求16或17所述的方法，其中，所述方法还包括：
    在所述随机接入过程中发送TA，使得终端设备基于所述TA进行时间信息的计算。
  29. 如权利要求28所述的方法，其中，
    所述TA包括第一TA和第二TA，所述第一TA和所述第二TA是基于不同的上行消息分别计算得到的。
  30. 一种终端设备，包括：
    发送单元，用于在随机接入过程中发送指示信息；
    其中，所述指示信息用于向网络设备指示所述终端设备通过所述随机接入过程获取TA。
  31. 一种网络设备，包括：
    接收单元，用于在随机接入过程中接收指示信息；
    其中，所述指示信息用于向网络设备指示终端设备通过所述随机接入过程获取TA。
  32. 一种终端设备，包括：存储器、处理器及存储在所述存储器上并可在所述处理器上运行的计算机程序，所述计算机程序被所述处理器执行时实现如权利要求1至15中任一项所述的用于获取TA的方法的步骤。
  33. 一种网络设备，包括：存储器、处理器及存储在所述存储器上并可在所述处理器上运行的计算机程序，所述计算机程序被所述处理器执行时实现如权利要求16至29中任一项所述的用于获取TA的方法的步骤。
  34. 一种计算机可读存储介质，所述计算机可读存储介质上存储有计算机程序，所述计算机程序被处理器执行时实现如权利要求1至29中任一项所述的用于获取TA的方法的步骤。
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