WO2021163835A1 - 定时提前量的获取方法、装置、设备及存储介质 - Google Patents

定时提前量的获取方法、装置、设备及存储介质 Download PDF

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Publication number
WO2021163835A1
WO2021163835A1 PCT/CN2020/075514 CN2020075514W WO2021163835A1 WO 2021163835 A1 WO2021163835 A1 WO 2021163835A1 CN 2020075514 W CN2020075514 W CN 2020075514W WO 2021163835 A1 WO2021163835 A1 WO 2021163835A1
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Prior art keywords
terminal device
random access
mac
network device
signaling
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PCT/CN2020/075514
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English (en)
French (fr)
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石聪
杨宁
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Oppo广东移动通信有限公司
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Priority to PCT/CN2020/075514 priority Critical patent/WO2021163835A1/zh
Priority to CN202080083510.3A priority patent/CN114747263A/zh
Publication of WO2021163835A1 publication Critical patent/WO2021163835A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements

Definitions

  • the embodiments of the present application relate to the field of communication technologies, and in particular, to a method, device, device, and storage medium for obtaining a timing advance.
  • the uplinks in 5G NR (New Radio) cells are orthogonal, which means that the received uplink transmissions of different terminal devices in the same cell will not interfere with each other.
  • 5G NR New Radio
  • the uplink time slot boundaries be (approximately) aligned on the base station side. More specifically, the misalignment in the received signal time should fall within the cyclic prefix.
  • the NR standard introduces a transmit-timing advance (transmit-timing advance) mechanism.
  • the timing advance of the terminal equipment is between the starting point of the downlink time slot and the starting point of the uplink time slot observed by the terminal equipment, and is generally a negative offset.
  • the network can control the signal timing of each terminal device received by the base station by controlling the appropriate offset of each terminal device. Compared with the terminal close to the base station, the terminal far away from the base station has a longer propagation delay, so it needs to send uplink in advance.
  • the network determines the timing advance (TA) of each terminal device based on the measurement of the uplink transmission of each terminal device.
  • the terminal device When the terminal device has no uplink transmission for a period of time, the base station cannot accurately estimate the TA. At this time, the terminal device needs to perform random access to obtain the TA from the base station. Specifically, after the terminal device sends a random access request to the base station, the random access response returned by the base station to the terminal device will include TAC (Timing Advance Command), which is used to indicate TA to the terminal device. . In addition, the random access response will also include uplink authorization (UL grant, including time-frequency resources for sending subsequent uplink signaling, MCS (Modulation and Coding Scheme) format, power control instructions, etc.), temporary C- RNTI (Cell Radio Network Temporary Identifier, cell radio network temporary identifier) and other information.
  • TAC Transmission Advance Command
  • the random access response will also include uplink authorization (UL grant, including time-frequency resources for sending subsequent uplink signaling, MCS (Modulation and Coding Scheme) format, power control instructions, etc.), temporary C- RNTI (Cell Radio Network Tempo
  • the terminal device obtains TA based on random access, which will cause a large waste of resources.
  • the embodiments of the present application provide a method, device, device, and storage medium for obtaining a timing advance.
  • the technical solution is as follows:
  • an embodiment of the present application provides a method for obtaining a timing advance, which is applied to a terminal device, and the method includes:
  • the random access resource dedicated to obtaining TA is used to send a random access request to the network device.
  • an embodiment of the present application provides a method for providing timing advance, which is applied to a network device, and the method includes:
  • a random access request sent by a terminal device is received, where the random access request is sent using a random access resource dedicated to acquiring TA.
  • an embodiment of the present application provides an apparatus for obtaining a timing advance, which is applied to a terminal device, and the apparatus includes:
  • the request sending module is used for sending a random access request to the network device by using the random access resource dedicated to obtaining the TA.
  • an embodiment of the present application provides an apparatus for providing timing advance, which is applied to network equipment, and the apparatus includes:
  • the request receiving module is used to receive the random access request sent by the terminal device, and the random access request is sent by using the random access resource dedicated to obtaining the TA.
  • an embodiment of the present application provides a terminal device, the terminal device includes a processor and a transceiver connected to the processor; wherein:
  • the transceiver is configured to use random access resources dedicated to obtaining TAs to send random access requests to network equipment.
  • an embodiment of the present application provides a network device, the network device includes a processor and a transceiver connected to the processor; wherein:
  • the transceiver is configured to receive a random access request sent by a terminal device, and the random access request is sent using a random access resource dedicated to acquiring TA.
  • an embodiment of the present application provides a computer-readable storage medium in which a computer program is stored, and the computer program is used to be executed by a processor of a terminal device to achieve the above-mentioned acquisition of the timing advance method.
  • an embodiment of the present application provides a computer-readable storage medium in which a computer program is stored, and the computer program is used to be executed by a processor of a network device to realize the above-mentioned provision of timing advance method.
  • an embodiment of the present application provides a chip including a programmable logic circuit and/or program instructions, and when the chip runs on a terminal device, it is used to implement the above-mentioned method for obtaining the timing advance.
  • an embodiment of the present application provides a chip including a programmable logic circuit and/or program instructions, and when the chip runs on a network device, it is used to implement the above-mentioned method for providing timing advance.
  • the embodiments of the present application provide a computer program product, which when the computer program product runs on a processor of a terminal device, causes the terminal device to execute the above-mentioned method for acquiring the timing advance.
  • the embodiments of the present application provide a computer program product, which when the computer program product runs on a processor of a network device, causes the network device to execute the above-mentioned method for providing timing advance.
  • the terminal device can use the random access resource dedicated to obtaining the TA to send random access to the network device In this way, after the network device receives the random access request sent by the terminal device, if it finds that the random access request is sent using the random access resource dedicated to obtaining the TA, then the network device also knows the terminal device’s status. The purpose of initiating random access this time is to obtain TA, and the network device only needs to provide corresponding feedback to the terminal device according to the actual situation of whether the terminal device needs to compensate for the propagation delay, thereby helping to save downlink air interface resources.
  • FIG. 1 is a schematic diagram of a network architecture provided by an embodiment of the present application.
  • Figure 2 exemplarily shows a schematic diagram of the data structure of a random access response
  • FIG. 3 is a flowchart of a method for acquiring a timing advance provided by an embodiment of the present application
  • FIG. 4 is a flowchart of a method for acquiring a timing advance provided by another embodiment of the present application.
  • FIG. 5 is a flowchart of a method for acquiring a timing advance provided by another embodiment of the present application.
  • Fig. 6 exemplarily shows a schematic diagram of a data structure of TA MAC CE signaling
  • Fig. 7 exemplarily shows a schematic diagram of a sub-header of TA MAC CE signaling
  • Fig. 8 exemplarily shows a schematic diagram of another sub-header of TA MAC CE signaling
  • Fig. 9 exemplarily shows a flowchart for updating the TA validity period timer
  • FIG. 10 exemplarily shows a flow chart of a terminal device adjusting network clock information according to TA
  • FIG. 11 exemplarily shows a schematic diagram of a terminal device adjusting network clock information according to TA
  • FIG. 12 is a block diagram of a device for acquiring a timing advance provided by an embodiment of the present application.
  • FIG. 13 is a block diagram of an apparatus for providing timing advance provided by an embodiment of the present application.
  • FIG. 14 is a schematic structural diagram of a terminal device provided by an embodiment of the present application.
  • FIG. 15 is a schematic structural diagram of a network device provided by an embodiment of the present application.
  • FIG. 1 shows a schematic diagram of a network architecture provided by an embodiment of the present application.
  • the network architecture may include: a terminal device 10 and a network device 20.
  • the number of terminal devices 10 is usually multiple, and one or more terminal devices 10 may be distributed in a cell managed by each network device 20.
  • the terminal device 10 may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem, as well as various forms of user equipment (UE), and mobile stations. (Mobile Station, MS), terminal device (terminal device), etc.
  • UE user equipment
  • MS mobile Station, MS
  • terminal device terminal device
  • the network device 20 is a device deployed in an access network to provide a wireless communication function for the terminal device 10.
  • the network device 20 may include various forms of macro base stations, micro base stations, relay stations, access points, and so on.
  • the names of devices with base station functions may be different.
  • they are called gNodeB or gNB.
  • the name "base station” may change.
  • the above-mentioned devices that provide wireless communication functions for the terminal device 10 are collectively referred to as network devices.
  • the "5G NR system" in the embodiments of the present disclosure may also be referred to as a 5G system or an NR system, but those skilled in the art can understand its meaning.
  • the technical solutions described in the embodiments of the present disclosure may be applicable to the 5G NR system, and may also be applicable to the subsequent evolution system of the 5G NR system.
  • the terminal device can obtain the clock information on the network device side through unicast signaling or broadcast signaling sent by the network device, and synchronize it with it, in order to obtain better synchronization performance, the terminal device or network device may need to obtain TA To eliminate the synchronization error caused by the propagation path delay. If the network device determines that the distance between the terminal device and the network device is relatively close, it can indicate that the terminal device does not need to make propagation delay compensation (propagation delay compensation). On the contrary, it is necessary to instruct the terminal equipment to compensate for the propagation delay.
  • the network device can obtain the value of TA by obtaining the uplink signal and compensate for the unicast signaling it sends; however, when the terminal device has no uplink transmission for a period of time, Network equipment cannot accurately estimate TA. At this time, the terminal device needs to perform random access to obtain the following information in the received random access response: 1) Whether the terminal device needs to apply TA for propagation delay compensation; 2) TA specific information.
  • random access mainly serves the following purposes:
  • Uplink/downlink data arrives in the RRC connected state and the uplink synchronization is out of synchronization
  • the network device After the terminal device sends a random access request to the network device, the network device returns a random access response to the terminal device.
  • FIG. 2 it exemplarily shows a schematic diagram of the data structure of the random access response.
  • the random access response will include a TAC, and the TAC is used to indicate the TA to the terminal device.
  • the random access response will also include UL grant (including time-frequency resources for sending subsequent uplink signaling, MCS format, power control instructions, etc.), temporary C-RNTI and other information.
  • the network device After receiving the random access request sent by the terminal device, the network device does not know whether the terminal device initiates random access only to obtain the TA, or whether it has other purposes. Therefore, the network device will send TA and other information such as UL grant and temporary C-RNTI to the terminal device in a random access response. However, if the terminal device initiates random access only to obtain the TA, then theoretically the network device only needs to return the TA to the terminal device, and other information is not needed for the terminal device, which will result in larger resources Waste.
  • the technical solution provided by this application allocates random access resources dedicated to obtaining TAs for terminal equipment.
  • the terminal equipment initiates random access to obtain TAs
  • the terminal equipment can use the random access resources dedicated to obtaining TAs.
  • the network device receives the random access request sent by the terminal device, if it finds that the random access request is sent using the random access resource dedicated to obtaining TA, then the network device It is also learned that the purpose of the terminal device's random access this time is to obtain the TA, and the network device only needs to provide corresponding feedback to the terminal device according to the actual situation of whether the terminal device needs to compensate for the propagation delay. Helps save downlink air interface resources.
  • FIG. 3 shows a flowchart of a method for acquiring a timing advance provided by an embodiment of the present application.
  • This method can be applied to the network structure shown in Figure 1.
  • the method may include the following steps:
  • Step 310 The terminal device uses the random access resource dedicated to obtaining the TA, and sends a random access request to the network device.
  • the network device receives the random access request sent by the terminal device, and the random access request is sent by using the random access resource dedicated to obtaining the TA.
  • the foregoing random access resource includes at least one of the following: a random access preamble and a time-frequency resource.
  • the terminal device may use a random access preamble dedicated to obtain the TA to initiate a contention-free random access to the network device.
  • the terminal device sends a random access request to the network device, and the random access request includes a random access preamble dedicated to acquiring the TA.
  • the network device After the network device receives the random access request sent by the terminal device, if it finds that the random access request is sent using the random access resource dedicated to obtaining the TA, the network device also knows that the terminal device initiated the random access request this time.
  • the purpose of entering is to obtain TA, or in other words, it is known that the purpose of random access initiated by the terminal device this time is only to obtain TA. In this way, the network device notifies the terminal device of the result after determining whether the terminal device needs to compensate for the propagation delay.
  • the network device when the network device determines that the terminal device needs to perform propagation delay compensation, it can send TA to the terminal device, which implicitly informs the terminal device that it needs propagation delay compensation, and the terminal device can use the network
  • the TA feedback from the equipment is used for propagation delay compensation.
  • the network device may not send feedback information to the terminal device, so as to implicitly inform the terminal device that it does not need to make propagation delay compensation; or, also Feedback information can be sent to the terminal device, and the terminal device can be clearly informed that it does not need to make propagation delay compensation through the feedback information.
  • the network device when it is determined that the terminal device does not need to make propagation delay compensation, the network device does not need to send TA to the terminal device.
  • the network device may also allocate the aforementioned random access resource dedicated to acquiring the TA to the terminal device, and the process may be as follows:
  • Step 302 The network device sends second configuration information to the terminal device, where the second configuration information is used to configure the terminal device with a random access resource dedicated to acquiring TA.
  • the terminal device receives the second configuration information sent by the network device.
  • the random access resource dedicated to acquiring TA configured by the network device for the terminal device may include a random access preamble dedicated to acquiring TA, or time-frequency resources dedicated to acquiring TA, and may also include Obtain the TA's random access preamble and time-frequency resources.
  • the network device may send the second configuration information to the terminal device through high-level signaling (such as RRC signaling). After receiving the second configuration information, the terminal device can initiate random access by using the random access resource dedicated to acquiring TA when it needs to initiate random access in order to obtain the TA.
  • the technical solution provided by this application allocates random access resources dedicated to obtaining TA to the terminal device.
  • the terminal device initiates random access to obtain the TA
  • the terminal device can use the dedicated random access resource to obtain the TA.
  • the random access resource sends a random access request to the network device.
  • the network equipment After the network device receives the random access request sent by the terminal device, if it finds that the random access request is sent using the random access resource dedicated to obtaining the TA Yes, the network equipment also knows that the purpose of the random access initiated by the terminal equipment this time is to obtain the TA, and the network equipment only needs to provide corresponding feedback to the terminal equipment according to the actual situation of whether the terminal equipment needs to compensate for the propagation delay That is, it helps to save downlink air interface resources.
  • step 320 after the network device receives the random access request sent by the terminal device, the following step 320 may be performed, or the following steps 330-340 may be performed:
  • Step 320 In the case of determining and/or informing the terminal device that propagation delay compensation is required, the network device sends a random access response to the terminal device, the random access response includes TA; accordingly, the terminal device receives the network device's transmission Random access response.
  • step 330 when it is determined and/or notified that the terminal device does not need to make propagation delay compensation, the network device sends the first DCI (Downlink Control Information) to the terminal device; accordingly, the terminal device receives the network device's transmission The first DCI;
  • the first DCI Downlink Control Information
  • Step 340 The network device sends a specific MAC (Media Access Control, Media Access Control) CE (Control Element, control element) to the terminal device on the PDSCH (Physical Downlink Shared Channel) resource indicated by the first DCI. Signaling; accordingly, the terminal device receives the specific MAC CE signaling sent by the network device.
  • MAC Media Access Control, Media Access Control
  • CE Control Element, control element
  • the network device After receiving the aforementioned random access request sent by the terminal device, the network device first determines whether the terminal device needs propagation delay compensation. If it is determined that the terminal device needs to be compensated for propagation delay, the network device sends the terminal device a random access response scrambled by the terminal device’s RA-RNTI (Random Access RNTI).
  • RA-RNTI Random Access RNTI
  • the network device sends to the terminal device the first DCI scrambled by the terminal device's C-RNTI (Cell RNTI, cell radio network temporary identifier), and the first DCI is used through the first DCI instructs the terminal device to monitor the information sent by the network device on the PDSCH resource; subsequently, the network device sends a specific MAC CE signaling to the terminal device on the PDSCH resource indicated by the first DCI to inform the terminal device that it does not need to broadcast Time delay compensation and/or random access is not required to obtain TA.
  • the specific MAC CE signaling may be no payload MAC CE signaling (no payload MAC CE).
  • the terminal device After sending the aforementioned random access request to the network device, the terminal device detects and monitors the random access response on the one hand, and detects and monitors the first DCI on the other hand. If the terminal device receives the random access response scrambled by the RA-RNTI of the terminal device, it obtains the TA from the random access response, and then uses the TA to compensate for propagation delay.
  • the terminal device receives the first DCI scrambled with the C-RNTI of the terminal device, then it receives the information sent by the network device on the PDSCH resource indicated by the first DCI, and if it receives the specific MAC CE signaling sent by the network device , Then the terminal device also knows that it does not need to make propagation delay compensation and/or does not need to make random access to obtain TA.
  • the terminal device can determine whether propagation delay compensation is required based on the received information; Sending specific MAC CE signaling can save downlink air interface resources.
  • the following steps 350-360 may be performed:
  • Step 350 The network device sends the second DCI to the terminal device.
  • Step 360 The network device sends TA MAC CE signaling to the terminal device on the PDSCH resource indicated by the second DCI.
  • the network device informs the terminal device whether propagation delay compensation is required through TA MAC CE signaling.
  • the network device After receiving the aforementioned random access request sent by the terminal device, the network device sends the terminal device a second DCI scrambled by the terminal device’s C-RNTI, and instructs the terminal device to monitor the network on PDSCH resources through the second DCI. Information sent by the device.
  • the network device sends the first TA MAC CE signaling to the terminal device on the PDSCH resource indicated by the second DCI, and the first TA MAC CE signaling Including TA.
  • the network device When it is determined and/or notified that the terminal device does not need to make propagation delay compensation, the network device sends a second TA MAC CE signaling to the terminal device on the PDSCH resource indicated by the second DCI, and the second TA MAC CE signaling is The flag that does not include TA in the command and/or indicates whether TA is meaningful is set to the fourth value.
  • the foregoing fourth numerical value is a numerical value used to represent "no", for example, when 0 represents "no", then the fourth numerical value is 0.
  • the subheader of the TA MAC CE signaling includes the flag bit used to indicate whether the TA is meaningful; when the flag bit is set to the fourth value, it means that the TA MAC CE signaling has no meaning At this time, the TA MAC CE signaling is the second TA MAC CE signaling; when the flag bit is set to the fifth value, it means that the TA MAC CE signaling has a meaningful payload ( payload), at this time, the TA MAC CE signaling is the above-mentioned first TA MAC CE signaling.
  • the fourth value is a value used to indicate “no”
  • the fifth value is a value used to indicate “yes”, for example, the fourth value is 0 and the fifth value is 1.
  • the terminal device can determine whether propagation delay compensation is required based on the received TA MAC CE signaling; on the other hand, compared to sending TA through a random access response, due to TA MAC CE signaling Compared with random access response, the bit overhead is less, so sending TA through TA MAC CE signaling can save downlink air interface resources.
  • TA MAC CE signaling is identified by a MAC PDU (Protocol Data Unit) subheader with LCID (Logical Channel Identity, logical channel identifier).
  • MAC PDU Protocol Data Unit
  • LCID Logical Channel Identity, logical channel identifier
  • TAG ID (TAG Identity, tag identification): This field indicates the identification of the addressed tag.
  • the tag containing the SpCell has a TAG ID of 0.
  • the length of the TAG ID field is 2 bits.
  • TAC Timing Advance Command
  • This field indicates the TA index value (including 0, 1, 2, ..., 63) used to control the timing adjustment that the MAC entity must apply.
  • the length of this field is 6 bits.
  • FIG. 7 and FIG. 8 which show schematic diagrams of the subheader format of TA MAC CE signaling.
  • the sub-header format shown in Figure 7 it includes two R fields (or called R fields) and one LCID field (or called LCID fields), so this sub-header format can also be called R/LCID MAC sub head.
  • the sub-header format shown in Figure 8 including 1 R field, 1 F field (or called F field), 1 LCID field and an 8-bit L field (or called L field), so the sub The header format can also be called R/F/LCID/L MAC sub-header.
  • the length of the L field of the R/F/LCID/L MAC subheader can also be 16 bits.
  • the LCID field is used to describe the logical channel ID, and each MAC subheader contains a 6-bit logical channel ID, which is used to indicate the logical channel of the SDU (Service Data Unit, service data unit), or the MAC CE type, with a value ranging from 0 to 63 .
  • the L field indicates the number of bytes of the SDU or MAC CE.
  • the F field indicates the format of the L field, 0 means 8bit L field, and 1 means 16bit L field.
  • the R field is a reserved field and occupies 1 bit.
  • the value of the LCID field is set to the first value.
  • a new value of the LCID field (that is, the above-mentioned first value) is requisitioned to indicate that the MAC CE signaling is a specific MAC CE signaling, which is used to indicate the MAC CE signaling Meaningless and/or no payload and/or TA does not need to be updated.
  • the first value can be defined in advance, which is not limited in the embodiment of the present application.
  • the value of the L field is set to the second value and/or the value of the R field is set to the third value.
  • the value of the L field is set to the second value to indicate that the MAC CE signaling is a specific MAC CE signaling, which is used to indicate that the MAC CE signaling is meaningless and/or has no meaning.
  • the payload and/or TA do not need to be updated.
  • the second value can be defined in advance, which is not limited in the embodiment of the present application. For example, the second value is 0, that is, the value of the L field is set to 0.
  • the value of the R field is set to the third value to indicate that the MAC CE signaling is a specific MAC CE signaling, which is used to indicate that the MAC CE signaling is meaningless and/or has no meaning.
  • the payload and/or TA do not need to be updated.
  • the third value can be defined in advance, which is not limited in the embodiment of the present application, for example, the third value is 0 or 1.
  • the value of the L field can also be set to the second value and the value of the R field is set to the third value at the same time, to indicate that the MAC CE signaling is a specific MAC CE signaling.
  • the value of the LCID field can still be set to the value used to indicate TA (such as 61).
  • the above-mentioned first method and the second method may also be applied at the same time to indicate that the MAC CE signaling is a specific MAC CE signaling, which is not limited in the embodiment of the present application.
  • the format design of the second TA MAC CE signaling described above can also be the same or similar to the format design of the specific MAC CE signaling to indicate that the MAC CE signaling is meaningless and/or has no payload. And/or TA does not need to be updated.
  • the network device may also send first configuration information to the terminal device.
  • the first configuration information is used to configure the terminal device for periodicity.
  • the transmission resource of SRS Sounding Reference Signal, sounding reference signal
  • SRS Sounding Reference Signal
  • SRS is used for network equipment to update TA for terminal equipment.
  • the terminal device periodically sends an SRS to the network device according to the above-mentioned first configuration information, so that the network device updates the TA of the terminal device based on the received SRS, and then sends the updated TA to the terminal device.
  • TA may also be determined based on other uplink signals, that is, the first configuration information may also be It is used to configure transmission resources for the terminal device to periodically send other uplink signals, so that the network device can update the TA for the terminal device based on the other uplink signals.
  • the terminal device can periodically obtain the latest TA from the network device without random access.
  • the network device determines whether the terminal device needs to perform propagation delay compensation in the following manner.
  • Manner 1 In the case of using RRC signaling to indicate the pre-compensated clock information to the terminal device, the network device determines that the terminal device does not need to perform propagation delay compensation.
  • Method 2 When the distance between the network device and the terminal device is less than the threshold, the network device determines that the terminal device does not need to make propagation delay compensation; when the distance between the network device and the terminal device is greater than or equal to the threshold Next, the network device determines that the terminal device needs to compensate for the propagation delay.
  • the foregoing threshold may be predefined or pre-configured, which is not limited in the embodiment of the present application.
  • the TA is small, which has no effect on the clock information. Assuming that the clock information is increased by 1 every 10ns, then the TA of 8ns is not enough to change the clock information, then the network The device does not need to precompensate the clock information, and the terminal device does not need to make compensation.
  • the distance between the network device and the terminal device is large, the TA is larger, and if the number of terminal devices that need to be synchronized is large, and the network device cannot do pre-compensation, the network device will inform the terminal The equipment makes propagation delay compensation by itself.
  • the terminal device receives the instruction information sent by the network device to inform the terminal device that propagation delay compensation is not required (for example, the instruction information may be the specific MAC CE signaling or the specific MAC CE signaling introduced in the above embodiment).
  • the terminal device starts the timer.
  • the terminal device no longer uses the random access resource dedicated to obtaining the TA to send a random access request to the network device and/or uses the SRS resource configured by the first configuration information to obtain the TA.
  • the start time of the timer may be the moment when the terminal device receives the foregoing indication information, and the duration of the timer may be pre-defined or pre-configured.
  • the terminal device can again use the random access resource dedicated to obtaining the TA to send a random access request to the network device and/or use the SRS resource configured by the first configuration information to obtain the TA.
  • the terminal device can obtain the latest TA information from the network device by updating the tracking area, sending uplink data, completing a random access, and so on.
  • the terminal device starts the TA validity period timer timeAlignmentTimer.
  • the terminal device When the terminal device’s TA validity period timer timeAlignmentTimer expires, the terminal device sends a random access preamble dedicated to obtaining TA to the network device to initiate random access to obtain TA information, and wait for the network device to return a random access response message to the terminal device make.
  • the terminal device When the terminal device receives a random access response or TA MAC CE with a payload, the terminal device considers that propagation delay compensation is needed, and the terminal device uses the TA contained in the random access response/TA MAC CE to adjust the network clock information , Restart the TA validity period timer timeAlignmentTimer.
  • the network device may also configure the terminal device with periodic SRS, which is used for the terminal device to send the SRS so that the network device can calculate the latest TA. In this case, the terminal device The latest TA can be obtained periodically from the base station without random access.
  • FIG. 9 shows a flowchart of updating the TA validity period timer timeAlignmentTimer by the terminal device.
  • the terminal device obtains the latest TA information from the network device by updating the tracking area, sending uplink data, completing a random access, etc., and then triggers the TA validity period timer timeAlignmentTimer to start;
  • the termination condition of the TA validity period timer timeAlignmentTimer may include: obtaining the latest TA due to other reasons such as uplink data transmission, tracking area update, beam failure recovery, etc.
  • the terminal device determines that the TA obtained last time is no longer valid, and needs to obtain the latest TA through random access;
  • the terminal device obtains the latest TA through random access.
  • the process can refer to the solution provided in the above embodiment; after the terminal device obtains the latest TA, it adjusts the network clock information.
  • the terminal device restarts the TA validity period timer timeAlignmentTimer.
  • the terminal device adjusts the network clock information according to the TA, and the related process is as follows:
  • Step 11 The terminal device determines delta_t according to the obtained effective TA
  • step 12 the terminal obtains from the network device that the clock information corresponding to the frame boundary of the next frame (or a specified later frame with a frame number of N) is T1;
  • Step 13 The terminal device applies delta_t, and when the frame boundary of the corresponding system frame maintained by itself arrives, it corrects the terminal device's own clock to T1+delta_t (delta_t>0).
  • the terminal device can obtain the latest TA information from the network device by updating the tracking area, sending uplink data, completing a random access, and so on.
  • the terminal device starts the TA validity period timer timeAlignmentTimer.
  • the terminal device When the terminal device’s TA validity period timer timeAlignmentTimer expires, the terminal device sends a random access preamble dedicated to obtaining TA to the network device to initiate random access to obtain TA information, and wait for the network device to return a random access response message to the terminal device make.
  • a terminal device When a terminal device receives a TA MAC CE with no payload or a MAC CE with no payload, the terminal device considers that it does not need to perform propagation delay compensation, or does not need to obtain the latest TA for propagation delay compensation.
  • the technical solution of the present application is introduced and explained only from the perspective of the interaction between the terminal device and the network device.
  • the above-mentioned steps performed by the terminal device can be separately implemented as a method for obtaining the timing advance on the terminal device side; the steps performed by the above-mentioned network device can be separately implemented as a method for providing the timing advance on the network device side.
  • FIG. 12 shows a block diagram of an apparatus for obtaining a timing advance provided by an embodiment of the present application.
  • the device has the function of realizing the above example of the method for obtaining the timing advance, and the function can be realized by hardware, or by hardware executing corresponding software.
  • the device can be the terminal device described above, or it can be set in the terminal device.
  • the apparatus 1200 may include: a request sending module 1210.
  • the request sending module 1210 is used for sending a random access request to a network device by using a random access resource dedicated to obtaining a TA.
  • the random access resource includes at least one of the following: a random access preamble and a time-frequency resource.
  • the apparatus 1200 further includes: a response receiving module 1220.
  • the response receiving module 1220 is configured to receive a random access response sent by the network device, where the random access response includes the TA; wherein, the random access response is that the network device determines and/or informs It is sent when the terminal device needs to compensate for the propagation delay.
  • the apparatus 1200 further includes: a DCI receiving module 1230 and a MAC receiving module 1240.
  • the DCI receiving module 1230 is configured to receive the first DCI sent by the network device.
  • the MAC receiving module 1240 is configured to receive specific MAC CE signaling sent by the network device on the PDSCH resource indicated by the first DCI. Wherein, the specific MAC CE signaling is sent by the network device when it is determined and/or notified that the terminal device does not need to make propagation delay compensation.
  • the value of the logical channel identifier LCID field is set to a first value; and/or, in the subheader of the specific MAC CE signaling, the value of the L field is set to Is the second value and/or the value of the R field is set to the third value.
  • the apparatus 1200 further includes: a DCI receiving module 1230 and a MAC receiving module 1240.
  • the DCI receiving module 1230 is configured to receive the second DCI sent by the network device.
  • the MAC receiving module 1240 is configured to receive TA MAC CE signaling sent by the network device on the PDSCH resource indicated by the second DCI.
  • the MAC receiving module 1240 is configured to:
  • the first TA MAC CE signaling sent by the network device, where the first TA MAC CE signaling includes the TA; wherein, the first TA MAC CE signaling is that the network device is determining and/ Or it is sent when the terminal equipment needs to be compensated for propagation delay;
  • the second TA MAC CE signaling sent by the network device is received, where the second TA MAC CE signaling does not include the TA and/or the flag bit indicating whether the TA is meaningful is set to a fourth value; where The second TA MAC CE signaling is sent by the network device when it is determined and/or notified that the terminal device does not need to make propagation delay compensation.
  • the apparatus further includes: a first configuration receiving module 1250.
  • the first configuration receiving module 1250 is configured to receive first configuration information sent by the network device, where the first configuration information is used to configure transmission resources for the terminal device to periodically send SRS; wherein, the SRS Used by the network device to update the TA for the terminal device.
  • the apparatus 1200 further includes: a second configuration receiving module 1260.
  • the second configuration receiving module 1260 is configured to receive second configuration information sent by the network device, where the second configuration information is used to configure the terminal device with the random access resource dedicated to acquiring TA.
  • the apparatus 1200 further includes: a timing activation module 1270.
  • the timing start module 1270 is configured to start a timer after receiving the indication information sent by the network device for notifying the terminal device that propagation delay compensation is not required;
  • the terminal device no longer uses the random access resource dedicated to acquiring TA to send a random access request to the network device and/or uses the first configuration information to configure SRS resource acquires TA.
  • the technical solution provided by this application allocates random access resources dedicated to obtaining TA to the terminal device.
  • the terminal device initiates random access to obtain the TA
  • the terminal device can use the dedicated random access resource to obtain the TA.
  • the random access resource sends a random access request to the network device.
  • the network equipment After the network device receives the random access request sent by the terminal device, if it finds that the random access request is sent using the random access resource dedicated to obtaining the TA Yes, the network equipment also knows that the purpose of the random access initiated by the terminal equipment this time is to obtain the TA, and the network equipment only needs to provide corresponding feedback to the terminal equipment according to the actual situation of whether the terminal equipment needs to compensate for the propagation delay That is, it helps to save downlink air interface resources.
  • FIG. 13 shows a block diagram of an apparatus for providing timing advance provided by an embodiment of the present application.
  • the device has the function of realizing the above-mentioned example of the method for providing timing advance, and the function can be realized by hardware, or by hardware executing corresponding software.
  • the device can be the network device described above, or it can be set in the network device.
  • the apparatus 1300 may include: a request receiving module 1310.
  • the request receiving module 1310 is configured to receive a random access request sent by a terminal device, and the random access request is sent by using a random access resource dedicated to obtaining TA.
  • the random access resource includes at least one of the following: a random access preamble and a time-frequency resource.
  • the apparatus 1300 further includes: a response sending module 1320.
  • the response sending module 1320 is configured to send a random access response to the terminal device in the case of determining and/or informing the terminal device that propagation delay compensation is required, and the random access response includes the TA.
  • the apparatus 1300 further includes: a DCI sending module 1330 and a MAC sending module 1340.
  • the DCI sending module 1330 is configured to send the first DCI to the terminal device when it is determined and/or notified that the terminal device does not need to make propagation delay compensation.
  • the MAC sending module 1340 is configured to send specific MAC CE signaling to the terminal device on the PDSCH resource indicated by the first DCI.
  • the value of the logical channel identifier LCID field is set to a first value; and/or, in the subheader of the specific MAC CE signaling, the value of the L field is set to Is the second value and/or the value of the R field is set to the third value.
  • the apparatus 1300 further includes: a DCI sending module 1330 and a MAC sending module 1340.
  • the DCI sending module 1330 is configured to send the second DCI to the terminal device.
  • the MAC sending module 1340 is configured to send TA MAC CE signaling to the terminal device on the PDSCH resource indicated by the second DCI.
  • the MAC sending module 1340 is configured to:
  • the second TA MAC CE signaling is sent to the terminal device, and the second TA MAC CE signaling does not include the TA And/or the flag indicating whether TA is meaningful is set to the fourth value.
  • the apparatus 1300 further includes: a first configuration sending module 1350.
  • the first configuration sending module 1350 is configured to send first configuration information to the terminal device when it is determined and/or notified that the terminal device needs to perform propagation delay compensation, where the first configuration information is used for
  • the terminal device is configured to periodically send transmission resources of the SRS; wherein, the SRS is used by the network device to update the TA for the terminal device.
  • the apparatus 1300 further includes: a second configuration sending module 1360.
  • the second configuration sending module 1360 is configured to send second configuration information to the terminal device, where the second configuration information is used to configure the terminal device with the random access resource dedicated to acquiring TA.
  • the apparatus 1300 further includes: a first determining module 1370.
  • the first determining module 1370 is configured to determine that the terminal device does not need to perform propagation delay compensation when the radio resource control RRC signaling is used to indicate the pre-compensated clock information to the terminal device.
  • the device 1300 further includes: a second determining module 1380.
  • the second determining module 1380 is configured to: when the distance between the network device and the terminal device is less than a threshold, determine that the terminal device does not need to perform propagation delay compensation; In the case that the distance between the terminal devices is greater than or equal to the threshold, it is determined that the terminal device needs to be compensated for the propagation delay.
  • the technical solution provided by this application allocates random access resources dedicated to obtaining TA to the terminal device.
  • the terminal device initiates random access to obtain the TA
  • the terminal device can use the dedicated random access resource to obtain the TA.
  • the random access resource sends a random access request to the network device.
  • the network equipment After the network device receives the random access request sent by the terminal device, if it finds that the random access request is sent using the random access resource dedicated to obtaining the TA Yes, the network equipment also knows that the purpose of the random access initiated by the terminal equipment this time is to obtain the TA, and the network equipment only needs to provide corresponding feedback to the terminal equipment according to the actual situation of whether the terminal equipment needs to compensate for the propagation delay That is, it helps to save downlink air interface resources.
  • the device provided in the above embodiment realizes its functions, only the division of the above-mentioned functional modules is used as an example for illustration. In actual applications, the above-mentioned functions can be allocated by different functional modules according to actual needs. That is, the content structure of the device is divided into different functional modules to complete all or part of the functions described above.
  • FIG. 14 shows a schematic structural diagram of a terminal device 140 provided by an embodiment of the present application.
  • the terminal device 140 may include: a processor 141, a receiver 142, a transmitter 143, a memory 144, and a bus 145.
  • the processor 141 includes one or more processing cores, and the processor 141 executes various functional applications and information processing by running software programs and modules.
  • the receiver 142 and the transmitter 143 may be implemented as a transceiver 146, and the transceiver 146 may be a communication chip.
  • the memory 144 is connected to the processor 141 through the bus 145.
  • the memory 144 may be used to store a computer program, and the processor 141 is used to execute the computer program to implement each step executed by the terminal device in the foregoing method embodiment.
  • the memory 144 can be implemented by any type of volatile or non-volatile storage device or a combination thereof.
  • the volatile or non-volatile storage device includes but is not limited to: RAM (Random-Access Memory, random access memory) And ROM (Read-Only Memory), EPROM (Erasable Programmable Read-Only Memory, Erasable Programmable Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory, Electrically Erasable Programmable Read-Only Memory) Memory), flash memory or other solid-state storage technology, CD-ROM (Compact Disc Read-Only Memory), DVD (Digital Video Disc, high-density digital video disc) or other optical storage, tape cartridges, magnetic tapes, disks Storage or other magnetic storage devices. in:
  • the transceiver 146 is configured to use a random access resource dedicated to obtaining TA to send a random access request to a network device.
  • the random access resource includes at least one of the following: a random access preamble and a time-frequency resource.
  • the transceiver 146 is further configured to receive a random access response sent by the network device, and the random access response includes the TA; wherein, the random access response is a random access response.
  • the network device sends it when it is determined and/or notified that the terminal device needs to be compensated for the propagation delay.
  • the transceiver 146 is further configured to receive the first DCI sent by the network device; on the PDSCH resource indicated by the first DCI, receive the specific MAC CE information sent by the network device Command; wherein, the specific MAC CE signaling is sent by the network device when it is determined and/or notified that the terminal device does not need to make propagation delay compensation.
  • the value of the logical channel identifier LCID field is set to a first value; and/or, in the subheader of the specific MAC CE signaling, the value of the L field is set to Is the second value and/or the value of the R field is set to the third value.
  • the transceiver 146 is further configured to receive the second DCI sent by the network device; on the PDSCH resource indicated by the second DCI, receive the TA MAC CE information sent by the network device make.
  • the transceiver 146 is further configured to receive the first TA MAC CE signaling sent by the network device, and the first TA MAC CE signaling includes the TA, and the first TA MAC CE signaling.
  • TA MAC CE signaling is sent by the network device when it determines and/or informs the terminal device that propagation delay compensation is needed; or, it receives the second TA MAC CE signaling sent by the network device, so The second TA MAC CE signaling does not include the TA and/or the flag bit indicating whether the TA is meaningful is set to a fourth value, and the second TA MAC CE signaling indicates that the network device is determining and/or Notifying the terminal equipment that it is sent without compensation for propagation delay.
  • the transceiver 146 is further configured to receive first configuration information sent by the network device, and the first configuration information is used to configure the terminal device to periodically send SRS transmission Resource; where the SRS is used by the network device to update the TA for the terminal device.
  • the transceiver 146 is further configured to receive second configuration information sent by the network device, and the second configuration information is used to configure the terminal device with the random access information dedicated to obtaining TA. Access resources.
  • the processor 141 is configured to start a timer after receiving the indication information sent by the network device for informing the terminal device that propagation delay compensation is not required; where Within the valid period of the timer, the terminal device no longer uses the random access resource dedicated to acquiring TA to send a random access request to the network device and/or acquires the SRS resource configured using the first configuration information TA.
  • FIG. 15 shows a schematic structural diagram of a network device 150 provided by an embodiment of the present application.
  • the network device 150 may include: a processor 151, a receiver 152, a transmitter 153, a memory 154, and a bus 155.
  • the processor 151 includes one or more processing cores, and the processor 151 executes various functional applications and information processing by running software programs and modules.
  • the receiver 152 and the transmitter 153 may be implemented as a transceiver 156, and the transceiver 156 may be a communication chip.
  • the memory 154 is connected to the processor 151 through a bus 155.
  • the memory 154 may be used to store a computer program, and the processor 151 is used to execute the computer program to implement each step executed by the network device in the foregoing method embodiment.
  • the memory 154 can be implemented by any type of volatile or non-volatile storage device or a combination thereof.
  • the volatile or non-volatile storage device includes but is not limited to: RAM (Random-Access Memory, random access memory) And ROM (Read-Only Memory), EPROM (Erasable Programmable Read-Only Memory, Erasable Programmable Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory, Electrically Erasable Programmable Read-Only Memory) Memory), flash memory or other solid-state storage technology, CD-ROM (Compact Disc Read-Only Memory), DVD (Digital Video Disc, high-density digital video disc) or other optical storage, tape cartridges, magnetic tapes, disks Storage or other magnetic storage devices. in:
  • the transceiver 156 is configured to receive a random access request sent by a terminal device, and the random access request is sent using a random access resource dedicated to obtaining a timing advance TA.
  • the random access resource includes at least one of the following: a random access preamble and a time-frequency resource.
  • the transceiver 156 is further configured to send a random access response to the terminal device when it is determined and/or notified that the terminal device needs to be compensated for propagation delay.
  • the TA is included in the access response.
  • the transceiver 156 is further configured to send the first DCI to the terminal device when it is determined and/or notified that the terminal device does not need to make propagation delay compensation; On the PDSCH resource indicated by the first DCI, specific MAC CE signaling is sent to the terminal device.
  • the value of the logical channel identifier LCID field is set to a first value; and/or, in the subheader of the specific MAC CE signaling, the value of the L field is set to Is the second value and/or the value of the R field is set to the third value.
  • the transceiver 156 is further configured to send a second DCI to the terminal device; on the PDSCH resource indicated by the second DCI, send TA MAC CE signaling to the terminal device.
  • the transceiver 156 is further configured to send the first TA MAC CE signaling to the terminal device when it is determined and/or notified that the terminal device needs to perform propagation delay compensation,
  • the first TA MAC CE signaling includes the TA; or, when it is determined and/or notified that the terminal device does not need to make propagation delay compensation, a second TA MAC CE signal is sent to the terminal device It is assumed that the second TA MAC CE signaling does not include the TA and/or the flag bit indicating whether the TA is meaningful is set to a fourth value.
  • the transceiver 156 is further configured to send first configuration information to the terminal device when it is determined and/or notified that the terminal device needs to be compensated for propagation delay.
  • a piece of configuration information is used to configure transmission resources for the terminal device to periodically send SRS; wherein, the SRS is used for the network device to update the TA for the terminal device.
  • the processor 151 is further configured to determine that the terminal device does not need to perform propagation delay compensation when the RRC signaling is used to indicate the pre-compensated clock information to the terminal device.
  • the processor 151 is further configured to determine that the terminal device does not need to perform propagation delay compensation when the distance between the network device and the terminal device is less than a threshold; In a case where the distance between the network device and the terminal device is greater than or equal to the threshold, it is determined that the terminal device needs to be compensated for propagation delay.
  • the transceiver 156 is further configured to send second configuration information to the terminal device, and the second configuration information is used to configure the terminal device with the random access dedicated to obtaining TA. Into resources.
  • the embodiment of the present application provides a computer-readable storage medium in which a computer program is stored, and the computer program is used to be executed by a processor of a terminal device to implement the above-mentioned method for obtaining a timing advance.
  • the embodiment of the present application provides a computer-readable storage medium in which a computer program is stored, and the computer program is used to be executed by a processor of a network device to implement the above-mentioned method for providing timing advance.
  • An embodiment of the present application provides a chip that includes a programmable logic circuit and/or program instructions, and when the chip runs on a terminal device, it is used to implement the above-mentioned method for obtaining the timing advance.
  • An embodiment of the present application provides a chip that includes a programmable logic circuit and/or program instructions, and when the chip runs on a network device, it is used to implement the above-mentioned method for providing timing advance.
  • This application also provides a computer program product, which when the computer program product runs on the processor of the terminal device, causes the terminal device to execute the above-mentioned method for obtaining the timing advance.
  • the present application also provides a computer program product, which when the computer program product runs on the processor of the network device, causes the network device to execute the above-mentioned method for providing timing advance.
  • the functions described in the embodiments of the present application may be implemented by hardware, software, firmware, or any combination thereof. When implemented by software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on the computer-readable medium.
  • the computer-readable medium includes a computer storage medium and a communication medium, where the communication medium includes any medium that facilitates the transfer of a computer program from one place to another.
  • the storage medium may be any available medium that can be accessed by a general-purpose or special-purpose computer.

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Abstract

本申请公开了一种定时提前量的获取方法、装置、设备及存储介质，涉及通信技术领域。所述方法包括：终端设备采用专用于获取TA的随机接入资源，向网络设备发送随机接入请求。通过为终端设备分配专用于获取TA的随机接入资源，当终端设备是为了获取TA而发起随机接入，终端设备可以采用该专用于获取TA的随机接入资源向网络设备发送随机接入请求，这样网络设备在接收到随机接入请求之后，如果发现该随机接入请求是采用专用于获取TA的随机接入资源发送的，那么也就获知了终端设备此次发起随机接入的目的是为了获取TA，网络设备仅需根据该终端设备是否需要做传播时延补偿的实际情况，进行相应的反馈即可，有助于节省下行空口资源。

Description

定时提前量的获取方法、装置、设备及存储介质 技术领域
本申请实施例涉及通信技术领域，特别涉及一种定时提前量的获取方法、装置、设备及存储介质。
背景技术
5G NR(New Radio，新空口)小区内上行是正交的，意味着接收到的同一小区内的不同终端设备的上行传输不会互相产生干扰。为了保持这种上行正交性(uplink orthogonality)，在给定参数集的情况下，要求上行时隙边界在基站侧(近似)对齐。更具体地说，接收信号时间上的不对齐应当落在循环前缀内。为了确保接收端时间对齐，NR标准引入了发送定时提前(transmit-timing advance)机制。
终端设备的定时提前介于终端设备观测到的下行时隙起点和上行时隙起点之间，一般为负的偏移量。网络通过控制每个终端设备合适的偏移量，能够控制基站接收各个终端设备的信号定时。相比于靠近基站的终端，远离基站的终端传播时延较大，因此需要提前发送上行。网络基于每个终端设备上行传输的测量来确定各个终端设备的定时提前量(Timing Advance，TA)。
当终端设备在一段时间内没有上行传输的情况下，基站无法准确估计TA。此时，终端设备需要通过做随机接入，以从基站获取TA。具体来说，终端设备在向基站发送随机接入请求之后，基站向终端设备返回的随机接入响应中会包括TAC(Timing Advance Command，定时提前量命令)，该TAC用于向终端设备指示TA。另外，随机接入响应中还会包括上行授权(UL grant，包括发送后续上行信令的时频资源、MCS(Modulation and Coding Scheme，调制与编码策略)格式、功控指令等)、临时C-RNTI(Cell Radio Network Temporary Identifier，小区无线网络临时标识)等信息。
目前，终端设备基于随机接入获取TA的方式，会造成较大的资源浪费。
发明内容
本申请实施例提供了一种定时提前量的获取方法、装置、设备及存储介质。所述技术方案如下：
一方面，本申请实施例提供了一种定时提前量的获取方法，应用于终端设备，所述方法包括：
采用专用于获取TA的随机接入资源，向网络设备发送随机接入请求。
另一方面，本申请实施例提供了一种定时提前量的提供方法，应用于网络设备，所述方法包括：
接收终端设备发送的随机接入请求，所述随机接入请求是采用专用于获取TA的随机接入资源发送的。
另一方面，本申请实施例提供了一种定时提前量的获取装置，应用于终端设备，所述装置包括：
请求发送模块，用于采用专用于获取TA的随机接入资源，向网络设备发送随机接入请求。
另一方面，本申请实施例提供了一种定时提前量的提供装置，应用于网络设备，所述装置包括：
请求接收模块，用于接收终端设备发送的随机接入请求，所述随机接入请求是采用专用 于获取TA的随机接入资源发送的。
另一方面，本申请实施例提供了一种终端设备，所述终端设备包括处理器和与所述处理器相连的收发器；其中：
所述收发器，用于采用专用于获取TA的随机接入资源，向网络设备发送随机接入请求。
另一方面，本申请实施例提供了一种网络设备，所述网络设备包括处理器和与所述处理器相连的收发器；其中：
所述收发器，用于接收终端设备发送的随机接入请求，所述随机接入请求是采用专用于获取TA的随机接入资源发送的。
另一方面，本申请实施例提供了一种计算机可读存储介质，所述存储介质中存储有计算机程序，所述计算机程序用于被终端设备的处理器执行，以实现上述定时提前量的获取方法。
另一方面，本申请实施例提供了一种计算机可读存储介质，所述存储介质中存储有计算机程序，所述计算机程序用于被网络设备的处理器执行，以实现上述定时提前量的提供方法。
还一方面，本申请实施例提供了一种芯片，所述芯片包括可编程逻辑电路和/或程序指令，当所述芯片在终端设备上运行时，用于实现上述定时提前量的获取方法。
还一方面，本申请实施例提供了一种芯片，所述芯片包括可编程逻辑电路和/或程序指令，当所述芯片在网络设备上运行时，用于实现上述定时提前量的提供方法。
还一方面，本申请实施例提供了一种计算机程序产品，当所述计算机程序产品在终端设备的处理器上运行时，使得终端设备执行上述定时提前量的获取方法。
还一方面，本申请实施例提供了一种计算机程序产品，当所述计算机程序产品在网络设备的处理器上运行时，使得网络设备执行上述定时提前量的提供方法。
本申请实施例提供的技术方案可以包括如下有益效果：
通过为终端设备分配专用于获取TA的随机接入资源，当终端设备是为了获取TA而发起随机接入时，终端设备可以采用该专用于获取TA的随机接入资源向网络设备发送随机接入请求，这样，网络设备在接收到终端设备发送的随机接入请求之后，如果发现该随机接入请求是采用专用于获取TA的随机接入资源发送的，那么网络设备也就获知了终端设备此次发起随机接入的目的是为了获取TA，网络设备仅需根据该终端设备是否需要做传播时延补偿的实际情况，向终端设备进行相应的反馈即可，从而有助于节省下行空口资源。
附图说明
图1是本申请一个实施例提供的网络架构的示意图；
图2示例性示出了随机接入响应的数据结构的示意图；
图3是本申请一个实施例提供的定时提前量的获取方法的流程图；
图4是本申请另一个实施例提供的定时提前量的获取方法的流程图；
图5是本申请另一个实施例提供的定时提前量的获取方法的流程图；
图6示例性示出了一种TA MAC CE信令的数据结构的示意图；
图7示例性示出了一种TA MAC CE信令的子头的示意图；
图8示例性示出了另一种TA MAC CE信令的子头的示意图；
图9示例性示出了一种对TA有效期定时器更新的流程图；
图10示例性示出了一种终端设备根据TA对网络时钟信息做调整的流程图；
图11示例性示出了一种终端设备根据TA对网络时钟信息做调整的示意图；
图12是本申请一个实施例提供的定时提前量的获取装置的框图；
图13是本申请一个实施例提供的定时提前量的提供装置的框图；
图14是本申请一个实施例提供的终端设备的结构示意图；
图15是本申请一个实施例提供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，下面将结合附图对本申请实施方式作进一步地详细描述。
本申请实施例描述的网络架构以及业务场景是为了更加清楚地说明本申请实施例的技术方案，并不构成对本申请实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
请参考图1，其示出了本申请一个实施例提供的网络架构的示意图。该网络架构可以包括：终端设备10和网络设备20。
终端设备10的数量通常为多个，每一个网络设备20所管理的小区内可以分布一个或多个终端设备10。终端设备10可以包括各种具有无线通信功能的手持设备、车载设备、可穿戴设备、计算设备或连接到无线调制解调器的其它处理设备，以及各种形式的用户设备(User Equipment，UE)，移动台(Mobile Station，MS)，终端设备(terminal device)等等。为方便描述，本申请实施例中，上面提到的设备统称为终端设备。
网络设备20是一种部署在接入网中用以为终端设备10提供无线通信功能的装置。网络设备20可以包括各种形式的宏基站，微基站，中继站，接入点等等。在采用不同的无线接入技术的系统中，具备基站功能的设备的名称可能会有所不同，例如在5G NR系统中，称为gNodeB或者gNB。随着通信技术的演进，“基站”这一名称可能会变化。为方便描述，本申请实施例中，上述为终端设备10提供无线通信功能的装置统称为网络设备。
本公开实施例中的“5G NR系统”也可以称为5G系统或者NR系统，但本领域技术人员可以理解其含义。本公开实施例描述的技术方案可以适用于5G NR系统，也可以适用于5G NR系统后续的演进系统。
终端设备虽然可以通过网络设备发送的单播信令或者广播信令获取网络设备侧的时钟信息，并且同步于其上，但是为了获取更好的同步性能，终端设备或者网络设备可能需要通过获取TA来消除传播路径时延带来的同步误差。如果网络设备判断终端设备与网络设备的距离较近，就可以指示告知终端设备不必做传播时延补偿(propagation delay compensation)。反之，就需要指示终端设备需要做传播时延补偿。一般对于有上行信号发送的终端设备，网络设备可以通过获取上行信号来获取TA的值并对其发送的单播信令进行补偿；然而，当终端设备在一段时间内没有上行传输的情况下，网络设备就无法准确估计TA。此时，终端设备需要通过做随机接入，在收到的随机接入响应中获取以下信息：1)终端设备是否需要应用TA做传播时延补偿；2)TA的具体信息。
在5G NR系统中，随机接入主要服务于以下几个目的：
1、从RRC(Radio Resource Control，无线资源控制)空闲态做初始接入；
2、RRC连接重建过程；
3、切换；
4、RRC连接态且上行同步失步情况下有上行/下行数据到达；
5、RRC非激活态转换；
6、当添加SCell(Secondary Cell，辅小区)时建立时间统一；
7、请求其他系统消息；
8、波束失败恢复。
终端设备在向网络设备发送随机接入请求之后，网络设备向终端设备返回随机接入响应。图2所示，其示例性示出了随机接入响应的数据结构的示意图。从图2可以看出，随机接入响应中会包括TAC，该TAC用于向终端设备指示TA。另外，随机接入响应中还会包括UL grant(包括发送后续上行信令的时频资源、MCS格式、功控指令等)、临时C-RNTI等信息。
对于网络设备来说，其在接收到终端设备发来的随机接入请求之后，网络设备并不知道终端设备仅仅是为了获取TA才发起随机接入，还是有其他目的。因此，网络设备会将TA以及诸如UL grant、临时C-RNTI等其他信息一并在随机接入响应中发送给终端设备。但是，如果终端设备仅仅是为了获取TA才发起随机接入，那么理论上网络设备仅需向终端设备返回TA即可，其他信息对于终端设备来说并不需要，这就会造成较大的资源浪费。
本申请提供的技术方案，通过为终端设备分配专用于获取TA的随机接入资源，当终端设备是为了获取TA而发起随机接入时，终端设备可以采用该专用于获取TA的随机接入资源向网络设备发送随机接入请求，这样，网络设备在接收到终端设备发送的随机接入请求之后，如果发现该随机接入请求是采用专用于获取TA的随机接入资源发送的，那么网络设备也就获知了终端设备此次发起随机接入的目的是为了获取TA，网络设备仅需根据该终端设备是否需要做传播时延补偿的实际情况，向终端设备进行相应的反馈即可，从而有助于节省下行空口资源。
下面，将结合几个实施例，对本申请技术方案进行介绍说明。
请参考图3，其示出了本申请一个实施例提供的定时提前量的获取方法的流程图。该方法可应用于图1所示的网络结构中。该方法可以包括如下步骤：
步骤310，终端设备采用专用于获取TA的随机接入资源，向网络设备发送随机接入请求。
相应地，网络设备接收终端设备发送的随机接入请求，该随机接入请求是采用专用于获取TA的随机接入资源发送的。
可选地，上述随机接入资源包括以下至少一项：随机接入前导码、时频资源。
例如，当终端设备是为了获取TA而发起随机接入时，终端设备可以采用专用于获取TA的随机接入前导码，向网络设备发起免于竞争的随机接入。例如，终端设备向网络设备发送随机接入请求，该随机接入请求中包括专用于获取TA的随机接入前导码。
网络设备在接收到终端设备发送的随机接入请求之后，如果发现该随机接入请求是采用专用于获取TA的随机接入资源发送的，那么网络设备也就获知了终端设备此次发起随机接入的目的是为了获取TA，或者说，也就获知了终端设备此次发起随机接入的目的仅仅是为了获取TA。这样，网络设备在确定出终端设备是否需要做传播时延补偿之后，将该结果告知给终端设备。例如，网络设备在确定出终端设备需要做传播时延补偿的情况下，可以向终端设备发送TA，这样也就隐式地告知了终端设备需要做传播时延补偿，并且终端设备可以利用该网络设备反馈的TA做传播时延补偿。又例如，网络设备在确定出终端设备不需要做传播时延补偿的情况下，可以不向终端设备发送反馈信息，以此来隐式地告知终端设备不需要做传播时延补偿；或者，也可以向终端设备发送反馈信息，通过该反馈信息明确地告知终端设备不需要做传播时延补偿。另外，在确定终端设备不需要做传播时延补偿的情况下，网络设备也就不需要向终端设备发送TA。
有关网络设备如何确定终端设备是否需要做传播时延补偿，以及网络设备在接收到上述随机接入请求之后的处理方式，将在下文实施例中进行详细说明。
可选地，如图3所示，网络设备还可以为终端设备分配上述专用于获取TA的随机接入资源，该过程可以如下：
步骤302，网络设备向终端设备发送第二配置信息，该第二配置信息用于为终端设备配置专用于获取TA的随机接入资源。
相应地，终端设备接收网络设备发送的第二配置信息。
例如，网络设备为终端设备配置的专用于获取TA的随机接入资源，可以包括专用于获取TA的随机接入前导码，也可以包括专用于获取TA的时频资源，还可以同时包括专用于获取TA的随机接入前导码和时频资源。网络设备可以通过高层信令(如RRC信令)将第二配置信息发送给终端设备。终端设备在接收到第二配置信息之后，在需要为了获取TA而发起随机接入时，就可以使用该专用于获取TA的随机接入资源发起随机接入。
综上所述，本申请提供的技术方案，通过为终端设备分配专用于获取TA的随机接入资 源，当终端设备是为了获取TA而发起随机接入时，终端设备可以采用该专用于获取TA的随机接入资源向网络设备发送随机接入请求，这样，网络设备在接收到终端设备发送的随机接入请求之后，如果发现该随机接入请求是采用专用于获取TA的随机接入资源发送的，那么网络设备也就获知了终端设备此次发起随机接入的目的是为了获取TA，网络设备仅需根据该终端设备是否需要做传播时延补偿的实际情况，向终端设备进行相应的反馈即可，从而有助于节省下行空口资源。
在示例性实施例中，如图4所示，网络设备接收终端设备发送的随机接入请求之后，可以执行如下步骤320，或者执行如下步骤330-340：
步骤320，在确定和/或告知终端设备需要做传播时延补偿的情况下，网络设备向终端设备发送随机接入响应，该随机接入响应中包括TA；相应地，终端设备接收网络设备发送的随机接入响应。
步骤330，在确定和/或告知终端设备不需要做传播时延补偿的情况下，网络设备向终端设备发送第一DCI(Downlink Control Information，下行控制信息)；相应地，终端设备接收网络设备发送的第一DCI；
步骤340，网络设备在第一DCI指示的PDSCH(Physical Downlink Shared Channel，物理下行共享信道)资源上，向终端设备发送特定MAC(Media Access Control，媒体接入控制)CE(Control Element，控制单元)信令；相应地，终端设备接收网络设备发送的特定MAC CE信令。
网络设备在接收到终端设备发送的上述随机接入请求之后，先确定该终端设备是否需要做传播时延补偿。如果确定该终端设备需要做传播时延补偿，那么网络设备向该终端设备发送采用该终端设备的RA-RNTI(Random Access RNTI，随机接入无线网络临时标识)加扰的随机接入响应，该随机接入响应中包括网络设备为终端设备确定的TA值。如果确定该终端设备不需要做传播时延补偿，那么网络设备向该终端设备发送采用该终端设备的C-RNTI(Cell RNTI，小区无线网络临时标识)加扰的第一DCI，通过该第一DCI指示终端设备在PDSCH资源上监听网络设备下发的信息；后续，网络设备在该第一DCI指示的PDSCH资源上，向终端设备发送特定MAC CE信令，以此告知终端设备不需要做传播时延补偿和/或不需要为获取TA做随机接入。可选地，该特定MAC CE信令可以是无载荷的MAC CE信令(no payload MAC CE)。
终端设备在向网络设备发送上述随机接入请求之后，一方面对随机接入响应进行检测监听，另一方面对第一DCI进行检测监听。如果终端设备接收到采用该终端设备的RA-RNTI加扰的随机接入响应，那么从该随机接入响应中获取TA，然后应用该TA做传播时延补偿。如果终端设备接收到采用该终端设备的C-RNTI加扰的第一DCI，那么在该第一DCI指示的PDSCH资源上接收网络设备发送的信息，如果接收到网络设备发送的特定MAC CE信令，那么终端设备也就知道了其不需要做传播时延补偿和/或不需要为获取TA做随机接入。
通过上述方式，一方面，终端设备能够基于接收到的信息，确定是否需要做传播时延补偿；另一方面，网络设备在确定终端设备不需要做传播时延补偿的情况下，通过向终端设备发送特定MAC CE信令，可以节省下行空口资源。
在示例性实施例中，如图5所示，网络设备接收终端设备发送的随机接入请求之后，可以执行如下步骤350-360：
步骤350，网络设备向终端设备发送第二DCI；
步骤360，网络设备在第二DCI指示的PDSCH资源上，向终端设备发送TA MAC CE信令。
在此示例性实施例中，网络设备通过TA MAC CE信令告知终端设备是否需要做传播时延补偿。网络设备在接收到终端设备发送的上述随机接入请求之后，向该终端设备发送采用该终端设备的C-RNTI加扰的第二DCI，通过该第二DCI指示终端设备在PDSCH资源上监听网络设备下发的信息。在确定和/或告知终端设备需要做传播时延补偿的情况下，网络设备 在第二DCI指示的PDSCH资源上，向终端设备发送第一TA MAC CE信令，该第一TA MAC CE信令中包括TA。在确定和/或告知终端设备不需要做传播时延补偿的情况下，网络设备在第二DCI指示的PDSCH资源上，向终端设备发送第二TA MAC CE信令，该第二TA MAC CE信令中不包括TA和/或指示TA是否有意义的标志位设为第四数值。可选地，上述第四数值是用于表示“否”的数值，例如当0表示“否”时，那么该第四数值就是0。
可选地，在TA MAC CE信令的子头中，包含该用于指示TA是否有意义的标志位；当该标志位设为第四数值时，表示该TA MAC CE信令中无有意义的载荷(payload)，此时该TA MAC CE信令即为上述第二TA MAC CE信令；当该标志位设为第五数值时，表示该TA MAC CE信令中有有意义的载荷(payload)，此时该TA MAC CE信令即为上述第一TA MAC CE信令。其中，第四数值是用于表示“否”的数值，第五数值是用于表示“是”的数值，例如第四数值为0且第五数值为1。
通过上述方式，一方面，终端设备能够基于接收到的TA MAC CE信令，确定是否需要做传播时延补偿；另一方面，相比于通过随机接入响应发送TA，由于TA MAC CE信令的比特开销相比于随机接入响应少，因此通过TA MAC CE信令发送TA，可以节省下行空口资源。
下面，对TA MAC CE信令进行介绍说明。
TA MAC CE信令由带有LCID(Logical Channel Identity，逻辑信道标识)的MAC PDU(Protocol Data Unit，协议数据单元)子头标识。TA MAC CE信令的大小是固定的，由8比特的单个字节组成，如图6所示，相关定义如下：
TAG ID(TAG Identity，标签标识)：该字段表示寻址的标签的标识。包含SpCell的标签具有的TAG ID为0。TAG ID的字段长度为2比特。
TAC(Timing Advance Command，定时提前命令)：该字段表示TA索引值(包括0，1，2，…，63)用于控制MAC实体必须应用的定时调整量。该字段的长度为6比特。
如图7和图8所示，其示出了TA MAC CE信令的子头(subheader)格式的示意图。在图7所示的子头格式中，包括2个R字段(或称为R域)以及1个LCID字段(或称为LCID域)，因此该子头格式也可以称为R/LCID MAC子头。在图8所示的子头格式中，包括1个R字段、1个F字段(或称为F域)、1个LCID字段以及一个8bit的L字段(或称为L域)，因此该子头格式也可以称为R/F/LCID/L MAC子头。在其它可能的情况下，R/F/LCID/L MAC子头的L字段长度还可以是16bit。
LCID字段用于描述逻辑信道ID，每一个MAC子头包含一个6bit的逻辑信道ID，用来指示SDU(Service Data Unit，服务数据单元)的逻辑信道，或者MAC CE类型，取值为0～63。L字段指示SDU或者MAC CE的字节数。F字段指示L字段的格式，0表示8bit L字段，1表示16bit L字段。R字段为保留字段，占用1bit。
上文实施例中介绍的特定MAC CE信令的格式设计可以如下：
1、特定MAC CE信令的子头中，LCID字段的值设为第一数值。
在TA MAC CE信令的子头中，征用一个全新的LCID字段的值(也即上述第一数值)，来表示该MAC CE信令为特定MAC CE信令，用于指示该MAC CE信令无意义和/或没有payload和/或TA无需更新。该第一数值可以预先定义，本申请实施例对此不作限定。
2、特定MAC CE信令的子头中，L字段的值设为第二数值和/或R字段的值设为第三数值。
在TA MAC CE信令的子头中，将L字段的值设为第二数值，来表示该MAC CE信令为特定MAC CE信令，用于指示该MAC CE信令无意义和/或没有payload和/或TA无需更新。该第二数值可以预先定义，本申请实施例对此不作限定，例如第二数值为0，也即L字段的值设为0。
在TA MAC CE信令的子头中，将R字段的值设为第三数值，来表示该MAC CE信令为特定MAC CE信令，用于指示该MAC CE信令无意义和/或没有payload和/或TA无需更新。该第三数值可以预先定义，本申请实施例对此不作限定，例如第三数值为0或1。
当然，在其它示例中，也可以同时将L字段的值设为第二数值且R字段的值设为第三数值，来表示该MAC CE信令为特定MAC CE信令。
在该第2种方式下，LCID字段的值仍然可以设为用于指示TA的值(如61)。
另外，在其它示例中，也可以同时应用上述第1种方式和第2种方式，来表示该MAC CE信令为特定MAC CE信令，本申请实施例对此不作限定。
需要说明的是，上文介绍的第二TA MAC CE信令的格式设计，也可以与该特定MAC CE信令的格式设计相同或类似，以表示该MAC CE信令无意义和/或没有payload和/或TA无需更新。
在示例性实施例中，网络设备在确定终端设备需要做传播时延补偿的情况下，网络设备还可以向终端设备发送第一配置信息，该第一配置信息用于为终端设备配置用于周期性发送SRS(Sounding Reference Signal，探测参考信号)的传输资源；相应地，终端设备接收网络设备发送的第一配置信息。
其中，SRS用于网络设备为终端设备更新TA。例如，终端设备根据上述第一配置信息，向网络设备周期性地发送SRS，以便于网络设备基于接收到的SRS对终端设备的TA进行更新，然后将更新后的TA发送给终端设备。
需要说明的是，在本申请实施例中，仅以基于SRS来确定TA为例进行介绍说明，在一些其它示例中，还可以基于其它上行信号来确定TA，也即第一配置信息还可以是用于为终端设备配置用于周期性发送其它上行信号的传输资源，以便于网络设备基于该其它上行信号为终端设备更新TA。
通过上述方式，终端设备无需通过随机接入便能周期性地从网络设备获取最新的TA。
在示例性实施例中，网络设备通过如下方式，确定终端设备是否需要做传播时延补偿。
方式一：在采用RRC信令向终端设备指示预补偿后的时钟信息的情况下，网络设备确定终端设备不需要做传播时延补偿。
方式二：在网络设备与终端设备之间的距离小于阈值的情况下，网络设备确定终端设备不需要做传播时延补偿；在网络设备与终端设备之间的距离大于或等于所述阈值的情况下，网络设备确定终端设备需要做传播时延补偿。
上述阈值可以预定义或预配置，本申请实施例对此不作限定。在网络设备与终端设备之间的距离较小的情况下，TA较小，对于时钟信息无影响，假设时钟信息是每隔10ns增1，那么8ns的TA不足以让时钟信息发生变化，则网络设备不需要对时钟信息进行预补偿，且要求终端设备也无需做补偿。在网络设备与终端设备之间的距离较大的情况下，TA较大，且如果需要同步的终端设备的数量较多，网络设备不好做预补偿的情况下，那么网络设备就会告知终端设备自行做传播时延补偿。
在示例性实施例中，终端设备在接收到网络设备发送的用于告知终端设备不需要做传播时延补偿的指示信息(例如该指示信息可以是上文实施例介绍的特定MAC CE信令或第二TA MAC CE信令)之后，终端设备启动定时器。其中，在该定时器的有效时间内，终端设备不再采用专用于获取TA的随机接入资源向网络设备发送随机接入请求和/或采用第一配置信息配置的SRS资源获取TA。可选地，该定时器的起始时间可以是终端设备接收到上述指示信息的时刻，该定时器的时长可以预定义或预配置。在定时器到期之后，终端设备才可以再次采用专用于获取TA的随机接入资源向网络设备发送随机接入请求和/或采用第一配置信息配置的SRS资源获取TA。
通过上述方式，能够避免在终端设备不需要做传播时延补偿的情况下，在短时间内多次地向网络设备发起用于获取TA的随机接入，避免资源浪费。
下面，通过两个示例，对本申请技术方案进行介绍说明。
在一个示例中，终端设备可以通过做追踪区更新、发送上行数据、完成一次随机接入等方式从网络设备获取最新的TA信息。当获取完毕后，终端设备开启TA有效期定时器timeAlignmentTimer。
当终端设备的TA有效期定时器timeAlignmentTimer过期后，终端设备向网络设备发送专用于获取TA的随机接入前导码，以发起随机接入获取TA信息，等待网络设备向终端设备返回随机接入响应信令。
当终端设备收到随机接入响应或有有效载荷的TA MAC CE，则终端设备认为需要做传播时延补偿，终端设备应用随机接入响应/TA MAC CE中包含的TA对网络时钟信息做调整，重启TA有效期定时器timeAlignmentTimer。另外，在网络设备需要终端设备做传播时延补偿的情况下，网络设备可能还会给终端设备配置周期性SRS，用于终端设备发送SRS以便网络设备计算得到最新的TA，该情况下终端设备无需做随机接入便能周期性的从基站获取最新的TA。
如图9所示，其示出了终端设备对TA有效期定时器timeAlignmentTimer更新的流程图。
在时间节点1：终端设备通过做追踪区更新、发送上行数据、完成一次随机接入等方式从网络设备获取最新的TA信息，进而触发TA有效期定时器timeAlignmentTimer启动；
TA有效期定时器timeAlignmentTimer的中止条件可以包括：因其他原因如上行数据发送、追踪区更新、波束失败恢复等原因，获取到最新的TA。
在时间节点2：终端设备确定上次获取的TA不再有效，需要通过随机接入获取最新的TA；
在时间节点3：终端设备通过随机接入获取最新的TA，该过程可参见上文实施例提供的方案；终端设备获取到最新的TA后，对网络时钟信息做调整。
在时间节点4：终端设备重启TA有效期定时器timeAlignmentTimer。
其中，如图10和图11所示，终端设备根据TA对网络时钟信息做调整，相关流程如下：
步骤11，终端设备根据获取到的有效TA确定delta_t；
步骤12，终端从网络设备获取到时钟信息为下一帧(或者指定的之后的某一帧，帧号为N)的帧边界对应的时钟信息为T1；
步骤13，终端设备应用delta_t，在自身维护的相应系统帧的帧边界到达时，对终端设备自身的时钟进行修正，修正为T1+delta_t(delta_t＞0)。
在另一个示例中，终端设备可以通过做追踪区更新、发送上行数据、完成一次随机接入等方式从网络设备获取最新的TA信息。当获取完毕后，终端设备开启TA有效期定时器timeAlignmentTimer。
当终端设备的TA有效期定时器timeAlignmentTimer过期后，终端设备向网络设备发送专用于获取TA的随机接入前导码，以发起随机接入获取TA信息，等待网络设备向终端设备返回随机接入响应信令。
当终端设备收到无有效载荷的TA MAC CE或者无载荷的MAC CE时，终端设备认为自身不需要做传播时延补偿，或者不需要为做传播时延补偿获取最新TA。
需要说明的一点是，在上述实施例中，仅从终端设备和网络设备交互的角度，对本申请技术方案进行了介绍说明。上述有关终端设备执行的步骤，可以单独实现成为终端设备侧的定时提前量的获取方法；上述有关网络设备执行的步骤，可以单独实现成为网络设备侧的定时提前量的提供方法。
下述为本申请装置实施例，可以用于执行本申请方法实施例。对于本申请装置实施例中未披露的细节，请参照本申请方法实施例。
请参考图12，其示出了本申请一个实施例提供的定时提前量的获取装置的框图。该装置具有实现上述定时提前量的获取方法示例的功能，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。该装置可以是上文介绍的终端设备，也可以设置在终端设备中。如图12所示，该装置1200可以包括：请求发送模块1210。
请求发送模块1210，用于采用专用于获取TA的随机接入资源，向网络设备发送随机接入请求。
在示例性实施例中，所述随机接入资源包括以下至少一项：随机接入前导码、时频资源。
在示例性实施例中，如图12所示，所述装置1200还包括：响应接收模块1220。
响应接收模块1220，用于接收所述网络设备发送的随机接入响应，所述随机接入响应中包括所述TA；其中，所述随机接入响应是所述网络设备在确定和/或告知所述终端设备需要做传播时延补偿的情况下发送的。
在示例性实施例中，如图12所示，所述装置1200还包括：DCI接收模块1230和MAC接收模块1240。
DCI接收模块1230，用于接收所述网络设备发送的第一DCI。
MAC接收模块1240，用于在所述第一DCI指示的PDSCH资源上，接收所述网络设备发送的特定MAC CE信令。其中，所述特定MAC CE信令是所述网络设备在确定和/或告知所述终端设备不需要做传播时延补偿的情况下发送的。
可选地，所述特定MAC CE信令的子头中，逻辑信道标识LCID字段的值设为第一数值；和/或，所述特定MAC CE信令的子头中，L字段的值设为第二数值和/或R字段的值设为第三数值。
在示例性实施例中，如图12所示，所述装置1200还包括：DCI接收模块1230和MAC接收模块1240。
DCI接收模块1230，用于接收所述网络设备发送的第二DCI。
MAC接收模块1240，用于在所述第二DCI指示的PDSCH资源上，接收所述网络设备发送的TA MAC CE信令。
可选地，所述MAC接收模块1240，用于：
接收所述网络设备发送的第一TA MAC CE信令，所述第一TA MAC CE信令中包括所述TA；其中，所述第一TA MAC CE信令是所述网络设备在确定和/或告知所述终端设备需要做传播时延补偿的情况下发送的；
或者，
接收所述网络设备发送的第二TA MAC CE信令，所述第二TA MAC CE信令中不包括所述TA和/或指示TA是否有意义的标志位设为第四数值；其中，所述第二TA MAC CE信令是所述网络设备在确定和/或告知所述终端设备不需要做传播时延补偿的情况下发送的。
在示例性实施例中，如图12所示，所述装置还包括：第一配置接收模块1250。
第一配置接收模块1250，用于接收所述网络设备发送的第一配置信息，所述第一配置信息用于为所述终端设备配置用于周期性发送SRS的传输资源；其中，所述SRS用于所述网络设备为所述终端设备更新所述TA。
在示例性实施例中，如图12所示，所述装置1200还包括：第二配置接收模块1260。
第二配置接收模块1260，用于接收所述网络设备发送的第二配置信息，所述第二配置信息用于为所述终端设备配置所述专用于获取TA的随机接入资源。
在示例性实施例中，如图12所示，所述装置1200还包括：定时启动模块1270。
定时启动模块1270，用于在接收到所述网络设备发送的用于告知所述终端设备不需要做传播时延补偿的指示信息之后，启动定时器；
其中，在所述定时器的有效时间内，所述终端设备不再采用所述专用于获取TA的随机接入资源向所述网络设备发送随机接入请求和/或采用第一配置信息配置的SRS资源获取TA。
综上所述，本申请提供的技术方案，通过为终端设备分配专用于获取TA的随机接入资源，当终端设备是为了获取TA而发起随机接入时，终端设备可以采用该专用于获取TA的随机接入资源向网络设备发送随机接入请求，这样，网络设备在接收到终端设备发送的随机接入请求之后，如果发现该随机接入请求是采用专用于获取TA的随机接入资源发送的，那么网络设备也就获知了终端设备此次发起随机接入的目的是为了获取TA，网络设备仅需根据该终端设备是否需要做传播时延补偿的实际情况，向终端设备进行相应的反馈即可，从而有助 于节省下行空口资源。
请参考图13，其示出了本申请一个实施例提供的定时提前量的提供装置的框图。该装置具有实现上述定时提前量的提供方法示例的功能，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。该装置可以是上文介绍的网络设备，也可以设置在网络设备中。如图13所示，该装置1300可以包括：请求接收模块1310。
请求接收模块1310，用于接收终端设备发送的随机接入请求，所述随机接入请求是采用专用于获取TA的随机接入资源发送的。
在示例性实施例中，所述随机接入资源包括以下至少一项：随机接入前导码、时频资源。
在示例性实施例中，如图13所示，所述装置1300还包括：响应发送模块1320。
响应发送模块1320，用于在确定和/或告知所述终端设备需要做传播时延补偿的情况下，向所述终端设备发送随机接入响应，所述随机接入响应中包括所述TA。
在示例性实施例中，如图13所示，所述装置1300还包括：DCI发送模块1330和MAC发送模块1340。
DCI发送模块1330，用于在确定和/或告知所述终端设备不需要做传播时延补偿的情况下，向所述终端设备发送第一DCI。
MAC发送模块1340，用于在所述第一DCI指示的PDSCH资源上，向所述终端设备发送特定MAC CE信令。
可选地，所述特定MAC CE信令的子头中，逻辑信道标识LCID字段的值设为第一数值；和/或，所述特定MAC CE信令的子头中，L字段的值设为第二数值和/或R字段的值设为第三数值。
在示例性实施例中，如图13所示，所述装置1300还包括：DCI发送模块1330和MAC发送模块1340。
DCI发送模块1330，用于向所述终端设备发送第二DCI。
MAC发送模块1340，用于在所述第二DCI指示的PDSCH资源上，向所述终端设备发送TA MAC CE信令。
可选地，所述MAC发送模块1340，用于：
在确定和/或告知所述终端设备需要做传播时延补偿的情况下，向所述终端设备发送第一TA MAC CE信令，所述第一TA MAC CE信令中包括所述TA；
或者，
在确定和/或告知所述终端设备不需要做传播时延补偿的情况下，向所述终端设备发送第二TA MAC CE信令，所述第二TA MAC CE信令中不包括所述TA和/或指示TA是否有意义的标志位设为第四数值。
在示例性实施例中，如图13所示，所述装置1300还包括：第一配置发送模块1350。
第一配置发送模块1350，用于在确定和/或告知所述终端设备需要做传播时延补偿的情况下，向所述终端设备发送第一配置信息，所述第一配置信息用于为所述终端设备配置用于周期性发送SRS的传输资源；其中，所述SRS用于所述网络设备为所述终端设备更新所述TA。
在示例性实施例中，如图13所示，所述装置1300还包括：第二配置发送模块1360。
第二配置发送模块1360，用于向所述终端设备发送第二配置信息，所述第二配置信息用于为所述终端设备配置所述专用于获取TA的随机接入资源。
在示例性实施例中，如图13所示，所述装置1300还包括：第一确定模块1370。
第一确定模块1370，用于在采用无线资源控制RRC信令向所述终端设备指示预补偿后的时钟信息的情况下，确定所述终端设备不需要做传播时延补偿。
在示例性实施例中，如图13所示，所述装置1300还包括：第二确定模块1380。
第二确定模块1380，用于：在所述网络设备与所述终端设备之间的距离小于阈值的情况下，确定所述终端设备不需要做传播时延补偿；在所述网络设备与所述终端设备之间的距离大于或等于所述阈值的情况下，确定所述终端设备需要做传播时延补偿。
综上所述，本申请提供的技术方案，通过为终端设备分配专用于获取TA的随机接入资源，当终端设备是为了获取TA而发起随机接入时，终端设备可以采用该专用于获取TA的随机接入资源向网络设备发送随机接入请求，这样，网络设备在接收到终端设备发送的随机接入请求之后，如果发现该随机接入请求是采用专用于获取TA的随机接入资源发送的，那么网络设备也就获知了终端设备此次发起随机接入的目的是为了获取TA，网络设备仅需根据该终端设备是否需要做传播时延补偿的实际情况，向终端设备进行相应的反馈即可，从而有助于节省下行空口资源。
需要说明的一点是，上述实施例提供的装置在实现其功能时，仅以上述各个功能模块的划分进行举例说明，实际应用中，可以根据实际需要而将上述功能分配由不同的功能模块完成，即将设备的内容结构划分成不同的功能模块，以完成以上描述的全部或者部分功能。
关于上述实施例中的装置，其中各个模块执行操作的具体方式已经在有关该方法的实施例中进行了详细描述，此处将不做详细阐述说明。
请参考图14，其示出了本申请一个实施例提供的终端设备140的结构示意图。该终端设备140可以包括：处理器141、接收器142、发射器143、存储器144和总线145。
处理器141包括一个或者一个以上处理核心，处理器141通过运行软件程序以及模块，从而执行各种功能应用以及信息处理。
接收器142和发射器143可以实现为一个收发器146，该收发器146可以是一块通信芯片。
存储器144通过总线145与处理器141相连。
存储器144可用于存储计算机程序，处理器141用于执行该计算机程序，以实现上述方法实施例中终端设备执行的各个步骤。
此外，存储器144可以由任何类型的易失性或非易失性存储设备或者它们的组合实现，易失性或非易失性存储设备包括但不限于：RAM(Random-Access Memory，随机存储器)和ROM(Read-Only Memory，只读存储器)、EPROM(Erasable Programmable Read-Only Memory，可擦写可编程只读存储器)、EEPROM(Electrically Erasable Programmable Read-Only Memory，电可擦写可编程只读存储器)、闪存或其他固态存储其技术，CD-ROM(Compact Disc Read-Only Memory，只读光盘)、DVD(Digital Video Disc，高密度数字视频光盘)或其他光学存储、磁带盒、磁带、磁盘存储或其他磁性存储设备。其中：
所述收发器146，用于采用专用于获取TA的随机接入资源，向网络设备发送随机接入请求。
在示例性实施例中，所述随机接入资源包括以下至少一项：随机接入前导码、时频资源。
在示例性实施例中，所述收发器146，还用于接收所述网络设备发送的随机接入响应，所述随机接入响应中包括所述TA；其中，所述随机接入响应是所述网络设备在确定和/或告知所述终端设备需要做传播时延补偿的情况下发送的。
在示例性实施例中，所述收发器146，还用于接收所述网络设备发送的第一DCI；在所述第一DCI指示的PDSCH资源上，接收所述网络设备发送的特定MAC CE信令；其中，所述特定MAC CE信令是所述网络设备在确定和/或告知所述终端设备不需要做传播时延补偿的情况下发送的。
可选地，所述特定MAC CE信令的子头中，逻辑信道标识LCID字段的值设为第一数值；和/或，所述特定MAC CE信令的子头中，L字段的值设为第二数值和/或R字段的值设为第三数值。
在示例性实施例中，所述收发器146，还用于接收所述网络设备发送的第二DCI；在所述第二DCI指示的PDSCH资源上，接收所述网络设备发送的TA MAC CE信令。
在示例性实施例中，所述收发器146，还用于接收所述网络设备发送的第一TA MAC CE信令，所述第一TA MAC CE信令中包括所述TA，所述第一TA MAC CE信令是所述网络设备在确定和/或告知所述终端设备需要做传播时延补偿的情况下发送的；或者，接收所述网络设备发送的第二TA MAC CE信令，所述第二TA MAC CE信令中不包括所述TA和/或指示TA是否有意义的标志位设为第四数值，所述第二TA MAC CE信令是所述网络设备在确定和/或告知所述终端设备不需要做传播时延补偿的情况下发送的。
在示例性实施例中，所述收发器146，还用于接收所述网络设备发送的第一配置信息，所述第一配置信息用于为所述终端设备配置用于周期性发送SRS的传输资源；其中，所述SRS用于所述网络设备为所述终端设备更新所述TA。
在示例性实施例中，所述收发器146，还用于接收所述网络设备发送的第二配置信息，所述第二配置信息用于为所述终端设备配置所述专用于获取TA的随机接入资源。
在示例性实施例中，所述处理器141，用于在接收到所述网络设备发送的用于告知所述终端设备不需要做传播时延补偿的指示信息之后，启动定时器；其中，在所述定时器的有效时间内，所述终端设备不再采用所述专用于获取TA的随机接入资源向所述网络设备发送随机接入请求和/或采用第一配置信息配置的SRS资源获取TA。
请参考图15，其示出了本申请一个实施例提供的网络设备150的结构示意图。该网络设备150可以包括：处理器151、接收器152、发射器153、存储器154和总线155。
处理器151包括一个或者一个以上处理核心，处理器151通过运行软件程序以及模块，从而执行各种功能应用以及信息处理。
接收器152和发射器153可以实现为一个收发器156，该收发器156可以是一块通信芯片。
存储器154通过总线155与处理器151相连。
存储器154可用于存储计算机程序，处理器151用于执行该计算机程序，以实现上述方法实施例中网络设备执行的各个步骤。
此外，存储器154可以由任何类型的易失性或非易失性存储设备或者它们的组合实现，易失性或非易失性存储设备包括但不限于：RAM(Random-Access Memory，随机存储器)和ROM(Read-Only Memory，只读存储器)、EPROM(Erasable Programmable Read-Only Memory，可擦写可编程只读存储器)、EEPROM(Electrically Erasable Programmable Read-Only Memory，电可擦写可编程只读存储器)、闪存或其他固态存储其技术，CD-ROM(Compact Disc Read-Only Memory，只读光盘)、DVD(Digital Video Disc，高密度数字视频光盘)或其他光学存储、磁带盒、磁带、磁盘存储或其他磁性存储设备。其中：
所述收发器156，用于接收终端设备发送的随机接入请求，所述随机接入请求是采用专用于获取定时提前量TA的随机接入资源发送的。
在示例性实施例中，所述随机接入资源包括以下至少一项：随机接入前导码、时频资源。
在示例性实施例中，所述收发器156，还用于在确定和/或告知所述终端设备需要做传播时延补偿的情况下，向所述终端设备发送随机接入响应，所述随机接入响应中包括所述TA。
在示例性实施例中，所述收发器156，还用于在确定和/或告知所述终端设备不需要做传播时延补偿的情况下，向所述终端设备发送第一DCI；在所述第一DCI指示的PDSCH资源上，向所述终端设备发送特定MAC CE信令。
可选地，所述特定MAC CE信令的子头中，逻辑信道标识LCID字段的值设为第一数值；和/或，所述特定MAC CE信令的子头中，L字段的值设为第二数值和/或R字段的值设为第三数值。
在示例性实施例中，所述收发器156，还用于向所述终端设备发送第二DCI；在所述第 二DCI指示的PDSCH资源上，向所述终端设备发送TA MAC CE信令。
在示例性实施例中，所述收发器156，还用于在确定和/或告知所述终端设备需要做传播时延补偿的情况下，向所述终端设备发送第一TA MAC CE信令，所述第一TA MAC CE信令中包括所述TA；或者，在确定和/或告知所述终端设备不需要做传播时延补偿的情况下，向所述终端设备发送第二TA MAC CE信令，所述第二TA MAC CE信令中不包括所述TA和/或指示TA是否有意义的标志位设为第四数值。
在示例性实施例中，所述收发器156，还用于在确定和/或告知所述终端设备需要做传播时延补偿的情况下，向所述终端设备发送第一配置信息，所述第一配置信息用于为所述终端设备配置用于周期性发送SRS的传输资源；其中，所述SRS用于所述网络设备为所述终端设备更新所述TA。
在示例性实施例中，所述处理器151，还用于在采用RRC信令向所述终端设备指示预补偿后的时钟信息的情况下，确定所述终端设备不需要做传播时延补偿。
在示例性实施例中，所述处理器151，还用于在所述网络设备与所述终端设备之间的距离小于阈值的情况下，确定所述终端设备不需要做传播时延补偿；在所述网络设备与所述终端设备之间的距离大于或等于所述阈值的情况下，确定所述终端设备需要做传播时延补偿。
在示例性实施例中，所述收发器156，还用于向所述终端设备发送第二配置信息，所述第二配置信息用于为所述终端设备配置所述专用于获取TA的随机接入资源。
本申请实施例提供了一种计算机可读存储介质，所述存储介质中存储有计算机程序，所述计算机程序用于被终端设备的处理器执行，以实现上述定时提前量的获取方法。
本申请实施例提供了一种计算机可读存储介质，所述存储介质中存储有计算机程序，所述计算机程序用于被网络设备的处理器执行，以实现上述定时提前量的提供方法。
本申请实施例提供了一种芯片，所述芯片包括可编程逻辑电路和/或程序指令，当所述芯片在终端设备上运行时，用于实现上述定时提前量的获取方法。
本申请实施例提供了一种芯片，所述芯片包括可编程逻辑电路和/或程序指令，当所述芯片在网络设备上运行时，用于实现上述定时提前量的提供方法。
本申请还提供了一种计算机程序产品，当计算机程序产品在终端设备的处理器上运行时，使得终端设备执行上述定时提前量的获取方法。
本申请还提供了一种计算机程序产品，当计算机程序产品在网络设备的处理器上运行时，使得网络设备执行上述定时提前量的提供方法。
本领域技术人员应该可以意识到，在上述一个或多个示例中，本申请实施例所描述的功能可以用硬件、软件、固件或它们的任意组合来实现。当使用软件实现时，可以将这些功能存储在计算机可读介质中或者作为计算机可读介质上的一个或多个指令或代码进行传输。计算机可读介质包括计算机存储介质和通信介质，其中通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是通用或专用计算机能够存取的任何可用介质。
以上所述仅为本申请的示例性实施例，并不用以限制本申请，凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (46)

  1. 一种定时提前量的获取方法，其特征在于，应用于终端设备，所述方法包括：
    采用专用于获取定时提前量TA的随机接入资源，向网络设备发送随机接入请求。
  2. 根据权利要求1所述的方法，其特征在于，所述随机接入资源包括以下至少一项：随机接入前导码、时频资源。
  3. 根据权利要求1或2所述的方法，其特征在于，所述采用专用于获取TA的资源，向网络设备发送随机接入请求之后，还包括：
    接收所述网络设备发送的随机接入响应，所述随机接入响应中包括所述TA；
    其中，所述随机接入响应是所述网络设备在确定和/或告知所述终端设备需要做传播时延补偿的情况下发送的。
  4. 根据权利要求1或2所述的方法，其特征在于，所述采用专用于获取TA的资源，向网络设备发送随机接入请求之后，还包括：
    接收所述网络设备发送的第一下行控制信息DCI；
    在所述第一DCI指示的物理下行共享信道PDSCH资源上，接收所述网络设备发送的特定媒体接入控制MAC控制单元CE信令；
    其中，所述特定MAC CE信令是所述网络设备在确定和/或告知所述终端设备不需要做传播时延补偿的情况下发送的。
  5. 根据权利要求4所述的方法，其特征在于，
    所述特定MAC CE信令的子头中，逻辑信道标识LCID字段的值设为第一数值；
    和/或，
    所述特定MAC CE信令的子头中，L字段的值设为第二数值和/或R字段的值设为第三数值。
  6. 根据权利要求1或2所述的方法，其特征在于，所述采用专用于获取TA的资源，向网络设备发送随机接入请求之后，还包括：
    接收所述网络设备发送的第二DCI；
    在所述第二DCI指示的PDSCH资源上，接收所述网络设备发送的TA MAC CE信令。
  7. 根据权利要求6所述的方法，其特征在于，所述接收所述网络设备发送的TA MAC CE信令，包括：
    接收所述网络设备发送的第一TA MAC CE信令，所述第一TA MAC CE信令中包括所述TA；其中，所述第一TA MAC CE信令是所述网络设备在确定和/或告知所述终端设备需要做传播时延补偿的情况下发送的；
    或者，
    接收所述网络设备发送的第二TA MAC CE信令，所述第二TA MAC CE信令中不包括所述TA和/或指示TA是否有意义的标志位设为第四数值；其中，所述第二TA MAC CE信令是所述网络设备在确定和/或告知所述终端设备不需要做传播时延补偿的情况下发送的。
  8. 根据权利要求1至7任一项所述的方法，其特征在于，所述方法还包括：
    接收所述网络设备发送的第一配置信息，所述第一配置信息用于为所述终端设备配置用于周期性发送探测参考信号SRS的传输资源；
    其中，所述SRS用于所述网络设备为所述终端设备更新所述TA。
  9. 根据权利要求1至8任一项所述的方法，其特征在于，所述方法还包括：
    在接收到所述网络设备发送的用于告知所述终端设备不需要做传播时延补偿的指示信息之后，启动定时器；
    其中，在所述定时器的有效时间内，所述终端设备不再采用所述专用于获取TA的随机接入资源向所述网络设备发送随机接入请求和/或采用第一配置信息配置的SRS资源获取 TA。
  10. 根据权利要求1至9任一项所述的方法，其特征在于，所述方法还包括：
    接收所述网络设备发送的第二配置信息，所述第二配置信息用于为所述终端设备配置所述专用于获取TA的随机接入资源。
  11. 一种定时提前量的提供方法，其特征在于，应用于网络设备，所述方法包括：
    接收终端设备发送的随机接入请求，所述随机接入请求是采用专用于获取定时提前量TA的随机接入资源发送的。
  12. 根据权利要求11所述的方法，其特征在于，所述随机接入资源包括以下至少一项：随机接入前导码、时频资源。
  13. 根据权利要求11或12所述的方法，其特征在于，所述接收终端设备发送的随机接入请求之后，还包括：
    在确定和/或告知所述终端设备需要做传播时延补偿的情况下，向所述终端设备发送随机接入响应，所述随机接入响应中包括所述TA。
  14. 根据权利要求11或12所述的方法，其特征在于，所述接收终端设备发送的随机接入请求之后，还包括：
    在确定和/或告知所述终端设备不需要做传播时延补偿的情况下，向所述终端设备发送第一下行控制信息DCI；
    在所述第一DCI指示的物理下行共享信道PDSCH资源上，向所述终端设备发送特定媒体接入控制MAC控制单元CE信令。
  15. 根据权利要求14所述的方法，其特征在于，
    所述特定MAC CE信令的子头中，逻辑信道标识LCID字段的值设为第一数值；
    和/或，
    所述特定MAC CE信令的子头中，L字段的值设置为第二数值和/或R字段的值设为第三数值。
  16. 根据权利要求11或12所述的方法，其特征在于，所述接收终端设备发送的随机接入请求之后，还包括：
    向所述终端设备发送第二DCI；
    在所述第二DCI指示的PDSCH资源上，向所述终端设备发送TA MAC CE信令。
  17. 根据权利要求16所述的方法，其特征在于，所述向所述终端设备发送TA MAC CE信令，包括：
    在确定和/或告知所述终端设备需要做传播时延补偿的情况下，向所述终端设备发送第一TA MAC CE信令；其中，所述第一TA MAC CE信令中包括所述TA；
    或者，
    在确定和/或告知所述终端设备不需要做传播时延补偿的情况下，向所述终端设备发送第二TA MAC CE信令；其中，所述第二TA MAC CE信令中不包括所述TA和/或指示TA是否有意义的标志位设为第四数值。
  18. 根据权利要求11至17任一项所述的方法，其特征在于，所述方法还包括：
    在确定和/或告知所述终端设备需要做传播时延补偿的情况下，向所述终端设备发送第一配置信息，所述第一配置信息用于为所述终端设备配置用于周期性发送探测参考信号SRS的传输资源；
    其中，所述SRS用于所述网络设备为所述终端设备更新所述TA。
  19. 根据权利要求11至18任一项所述的方法，其特征在于，所述方法还包括：
    在采用无线资源控制RRC信令向所述终端设备指示预补偿后的时钟信息的情况下，确定所述终端设备不需要做传播时延补偿。
  20. 根据权利要求11至19任一项所述的方法，其特征在于，所述方法还包括：
    在所述网络设备与所述终端设备之间的距离小于阈值的情况下，确定所述终端设备不需要做传播时延补偿；
    在所述网络设备与所述终端设备之间的距离大于或等于所述阈值的情况下，确定所述终端设备需要做传播时延补偿。
  21. 根据权利要求11至20任一项所述的方法，其特征在于，所述方法还包括：
    向所述终端设备发送第二配置信息，所述第二配置信息用于为所述终端设备配置所述专用于获取TA的随机接入资源。
  22. 一种定时提前量的获取装置，其特征在于，应用于终端设备，所述装置包括：
    请求发送模块，用于采用专用于获取定时提前量TA的随机接入资源，向网络设备发送随机接入请求。
  23. 根据权利要求22所述的装置，其特征在于，所述随机接入资源包括以下至少一项：随机接入前导码、时频资源。
  24. 根据权利要求22或23所述的装置，其特征在于，所述装置还包括：
    响应接收模块，用于接收所述网络设备发送的随机接入响应，所述随机接入响应中包括所述TA；
    其中，所述随机接入响应是所述网络设备在确定和/或告知所述终端设备需要做传播时延补偿的情况下发送的。
  25. 根据权利要求22或23所述的装置，其特征在于，所述装置还包括：
    DCI接收模块，用于接收所述网络设备发送的第一下行控制信息DCI；
    MAC接收模块，用于在所述第一DCI指示的物理下行共享信道PDSCH资源上，接收所述网络设备发送的特定媒体接入控制MAC控制单元CE信令；
    其中，所述特定MAC CE信令是所述网络设备在确定和/或告知所述终端设备不需要做传播时延补偿的情况下发送的。
  26. 根据权利要求25所述的装置，其特征在于，
    所述特定MAC CE信令的子头中，逻辑信道标识LCID字段的值设为第一数值；
    和/或，
    所述特定MAC CE信令的子头中，L字段的值设为第二数值和/或R字段的值设为第三数值。
  27. 根据权利要求22或23所述的装置，其特征在于，所述装置还包括：
    DCI接收模块，用于接收所述网络设备发送的第二DCI；
    MAC接收模块，用于在所述第二DCI指示的PDSCH资源上，接收所述网络设备发送的TA MAC CE信令。
  28. 根据权利要求27所述的装置，其特征在于，所述MAC接收模块，用于：
    接收所述网络设备发送的第一TA MAC CE信令，所述第一TA MAC CE信令中包括所述TA；其中，所述第一TA MAC CE信令是所述网络设备在确定和/或告知所述终端设备需要做传播时延补偿的情况下发送的；
    或者，
    接收所述网络设备发送的第二TA MAC CE信令，所述第二TA MAC CE信令中不包括所述TA和/或指示TA是否有意义的标志位设为第四数值；其中，所述第二TA MAC CE信令是所述网络设备在确定和/或告知所述终端设备不需要做传播时延补偿的情况下发送的。
  29. 根据权利要求22至28任一项所述的装置，其特征在于，所述装置还包括：
    第一配置接收模块，用于接收所述网络设备发送的第一配置信息，所述第一配置信息用于为所述终端设备配置用于周期性发送探测参考信号SRS的传输资源；
    其中，所述SRS用于所述网络设备为所述终端设备更新所述TA。
  30. 根据权利要求22至29任一项所述的装置，其特征在于，所述装置还包括：
    定时启动模块，用于在接收到所述网络设备发送的用于告知所述终端设备不需要做传播时延补偿的指示信息之后，启动定时器；
    其中，在所述定时器的有效时间内，所述终端设备不再采用所述专用于获取TA的随机接入资源向所述网络设备发送随机接入请求和/或采用第一配置信息配置的SRS资源获取TA。
  31. 根据权利要求22至30任一项所述的装置，其特征在于，所述装置还包括：
    第二配置接收模块，用于接收所述网络设备发送的第二配置信息，所述第二配置信息用于为所述终端设备配置所述专用于获取TA的随机接入资源。
  32. 一种定时提前量的提供装置，其特征在于，应用于网络设备，所述装置包括：
    请求接收模块，用于接收终端设备发送的随机接入请求，所述随机接入请求是采用专用于获取定时提前量TA的随机接入资源发送的。
  33. 根据权利要求32所述的装置，其特征在于，所述随机接入资源包括以下至少一项：随机接入前导码、时频资源。
  34. 根据权利要求32或33所述的装置，其特征在于，所述装置还包括：
    响应发送模块，用于在确定和/或告知所述终端设备需要做传播时延补偿的情况下，向所述终端设备发送随机接入响应，所述随机接入响应中包括所述TA。
  35. 根据权利要求32或33所述的装置，其特征在于，所述装置还包括：
    DCI发送模块，用于在确定和/或告知所述终端设备不需要做传播时延补偿的情况下，向所述终端设备发送第一下行控制信息DCI；
    MAC发送模块，用于在所述第一DCI指示的物理下行共享信道PDSCH资源上，向所述终端设备发送特定媒体接入控制MAC控制单元CE信令。
  36. 根据权利要求35所述的装置，其特征在于，
    所述特定MAC CE信令的子头中，逻辑信道标识LCID字段的值设为第一数值；
    和/或，
    所述特定MAC CE信令的子头中，L字段的值设为第二数值和/或R字段的值设为第三数值。
  37. 根据权利要求32或33所述的装置，其特征在于，所述装置还包括：
    DCI发送模块，用于向所述终端设备发送第二DCI；
    MAC发送模块，用于在所述第二DCI指示的PDSCH资源上，向所述终端设备发送TA MAC CE信令。
  38. 根据权利要求37所述的装置，其特征在于，所述MAC发送模块，用于：
    在确定和/或告知所述终端设备需要做传播时延补偿的情况下，向所述终端设备发送第一TA MAC CE信令，所述第一TA MAC CE信令中包括所述TA；
    或者，
    在确定和/或告知所述终端设备不需要做传播时延补偿的情况下，向所述终端设备发送第二TA MAC CE信令，所述第二TA MAC CE信令中不包括所述TA和/或指示TA是否有意义的标志位设为第四数值。
  39. 根据权利要求32至38任一项所述的装置，其特征在于，所述装置还包括：
    第一配置发送模块，用于在确定和/或告知所述终端设备需要做传播时延补偿的情况下，向所述终端设备发送第一配置信息，所述第一配置信息用于为所述终端设备配置用于周期性发送探测参考信号SRS的传输资源；
    其中，所述SRS用于所述网络设备为所述终端设备更新所述TA。
  40. 根据权利要求32至39任一项所述的装置，其特征在于，所述装置还包括：
    第一确定模块，用于在采用无线资源控制RRC信令向所述终端设备指示预补偿后的时钟信息的情况下，确定所述终端设备不需要做传播时延补偿。
  41. 根据权利要求32至40任一项所述的装置，其特征在于，所述装置还包括第二确定模块，用于：
    在所述网络设备与所述终端设备之间的距离小于阈值的情况下，确定所述终端设备不需要做传播时延补偿；
    在所述网络设备与所述终端设备之间的距离大于或等于所述阈值的情况下，确定所述终端设备需要做传播时延补偿。
  42. 根据权利要求32至40任一项所述的装置，其特征在于，所述装置还包括：
    第二配置发送模块，用于向所述终端设备发送第二配置信息，所述第二配置信息用于为所述终端设备配置所述专用于获取TA的随机接入资源。
  43. 一种终端设备，其特征在于，所述终端设备包括处理器和与所述处理器相连的收发器；其中：
    所述收发器，用于采用专用于获取定时提前量TA的随机接入资源，向网络设备发送随机接入请求。
  44. 一种网络设备，其特征在于，所述网络设备包括处理器和与所述处理器相连的收发器；其中：
    所述收发器，用于接收终端设备发送的随机接入请求，所述随机接入请求是采用专用于获取定时提前量TA的随机接入资源发送的。
  45. 一种计算机可读存储介质，其特征在于，所述存储介质中存储有计算机程序，所述计算机程序用于被终端设备的处理器执行，以实现如权利要求1至10任一项所述的定时提前量的获取方法。
  46. 一种计算机可读存储介质，其特征在于，所述存储介质中存储有计算机程序，所述计算机程序用于被网络设备的处理器执行，以实现如权利要求11至21任一项所述的定时提前量的提供方法。
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