WO2020030062A1 - 一种通信方法及装置 - Google Patents

一种通信方法及装置 Download PDF

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Publication number
WO2020030062A1
WO2020030062A1 PCT/CN2019/099850 CN2019099850W WO2020030062A1 WO 2020030062 A1 WO2020030062 A1 WO 2020030062A1 CN 2019099850 W CN2019099850 W CN 2019099850W WO 2020030062 A1 WO2020030062 A1 WO 2020030062A1
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WIPO (PCT)
Prior art keywords
time
synchronization
information
terminal device
indication information
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PCT/CN2019/099850
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English (en)
French (fr)
Inventor
刘星
黄曲芳
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华为技术有限公司
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Publication of WO2020030062A1 publication Critical patent/WO2020030062A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W56/00Synchronisation arrangements
    • H04W56/001Synchronization between nodes
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J3/00Time-division multiplex systems
    • H04J3/02Details
    • H04J3/06Synchronising arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J3/00Time-division multiplex systems
    • H04J3/02Details
    • H04J3/06Synchronising arrangements
    • H04J3/0635Clock or time synchronisation in a network
    • H04J3/0638Clock or time synchronisation among nodes; Internode synchronisation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W56/00Synchronisation arrangements

Definitions

  • the present application relates to the field of communication technologies, and in particular, to a communication method and device.
  • 5th generation that is, new radio (NR)
  • NR new radio
  • URLLC low latency communication
  • the base station can perform time synchronization through the Global Navigation Satellite System (GNSS) or the 1588 protocol.
  • GNSS Global Navigation Satellite System
  • the base station may send a system information block (SIB) 16 to the terminal device.
  • SIB16 includes time information, and the terminal device may maintain time synchronization with the base station according to the time information in the SIB16.
  • the terminal equipment will not monitor and receive all SIB16s sent by the base station.
  • the base station needs to continuously update the time of the base station to maintain time synchronization.
  • the base station corrects the time deviation due to time drift, the time of the base station will jump.
  • the terminal device will be notified via SIB16.
  • the terminal equipment does not monitor and receive all the SIB16s sent by the base station, the terminal equipment cannot update the time in a timely manner, which causes the time of the base station to be out of synchronization, which further causes the delay and reliability of services such as URLLC cannot be guaranteed.
  • the embodiments of the present application provide a communication method and device, which are used to solve a problem that a terminal device cannot perform time update in time, and causes a time synchronization with a base station.
  • an embodiment of the present application provides a communication method.
  • the method includes:
  • the network device determines synchronization instruction information, where the synchronization instruction information is used to indicate time synchronization of the terminal device; the network device sends the synchronization instruction information.
  • the network device instructs the time synchronization of the terminal device through the synchronization instruction information, so that the terminal device can perform time synchronization in time according to the synchronization instruction information, and solves the problem that the terminal device cannot perform the time update in time and causes the time of the network device to be out of synchronization.
  • the synchronization indication information includes:
  • Period information which indicates the update period of the system time, or a synchronization period that instructs the terminal device to perform time synchronization
  • offset value information which indicates the point in time when the system time is updated relative to the reference An offset value of the time point in the time domain, or an offset value of the time point of the terminal device in performing time synchronization with respect to a reference time point in the time domain.
  • the synchronization indication information further includes: update accuracy information of the system time.
  • the network device can indicate the update accuracy information of each cycle of the system time, so that the terminal device can determine the deviation between the time of the terminal device and the system time.
  • the sending, by the network device, the synchronization instruction information includes: sending, by the network device, the synchronization instruction information through a system information block; or, the network device sends the synchronization instruction information through radio resource control RRC signaling.
  • the synchronization instruction information is described.
  • the synchronization indication information is a paging message, or the synchronization indication information is downlink control information DCI scrambled using a wireless network temporary identifier RNTI.
  • the network device can instruct the terminal device to perform time synchronization in a timely manner while ensuring compatibility with the existing communication protocol.
  • the synchronization instruction information includes an updated system time, or the synchronization instruction information includes a time adjustment amount of a system time.
  • the network device can directly indicate the updated system time, or the amount of time adjustment of the system time, to avoid power consumption when the terminal device monitors the system information block.
  • the synchronization indication information is downlink control information DCI scrambled with RNTI
  • the method further includes: the network device sends monitoring indication information to the terminal device, where the monitoring indication information is used for Indicates a monitoring period for monitoring the DCI.
  • the network device sets a monitoring period for the terminal device by using the monitoring instruction information, thereby avoiding power consumption caused by the terminal device frequently monitoring the DCI.
  • an embodiment of the present application provides a communication device, where the communication device includes a processor, and the processor is coupled to a memory, where: the memory is used to store instructions; the processor is used to execute the instructions stored in the memory to execute The first aspect or the method in any of the possible designs of the first aspect.
  • the communication device may further include a transceiver for supporting the communication device to perform information transmission and / or reception in the foregoing method.
  • the communication device may be a network device or a device in the network device, such as a chip or a chip system, where the chip system includes at least one chip, and the chip system may further include other circuit structures and / or Discrete devices.
  • an embodiment of the present application provides a communication device for implementing the first aspect or any one of the first aspects of the method, including a corresponding functional module, for example, including a receiving unit, a sending unit, and the like, which are respectively used for Implement the steps in the above method.
  • an embodiment of the present application provides a communication method, including:
  • the terminal device receives synchronization instruction information from a network device, and the synchronization instruction information is used to instruct the terminal device to perform time synchronization; the terminal device performs time synchronization according to the synchronization instruction information.
  • the terminal device performs time synchronization according to the synchronization instruction information, and solves the problem that the terminal device cannot perform time update in a timely manner, which causes the time synchronization with the network device.
  • the terminal device performs time synchronization according to the synchronization instruction information, including: the terminal device receives a system information block according to the synchronization instruction information, and according to the system time in the system information block Update the time of the terminal device.
  • the synchronization indication information is a paging message, or the synchronization indication information is downlink control information DCI scrambled using a wireless network temporary identifier RNTI.
  • a terminal device when a terminal device receives a paging message or adopts RNTI scrambled DCI, it can determine that time synchronization is required, so as to update the time of the terminal device according to the system time in the system information block.
  • the synchronization indication information includes:
  • Period information the period information indicating an update period of the system time, or a synchronization period instructing the terminal device to perform time synchronization
  • offset value information the offset value information indicating that a time point of the system time update is relative to An offset value of the reference time point in the time domain, or an offset value of the time point instructing the terminal device to perform time synchronization with respect to the reference time point in the time domain.
  • the synchronization indication information further includes: update accuracy information of the system time.
  • the terminal device performing time synchronization according to the synchronization instruction information includes:
  • the terminal device determines, based on the period information and the update accuracy information, that a difference between the time of the terminal device and the system time is greater than a threshold, and acquires a system according to the period information and the offset value information. Time, and update the time of the terminal device according to the system time.
  • the terminal device can determine whether to perform time synchronization according to a threshold, thereby avoiding power consumption caused when time synchronization is performed in each cycle.
  • the terminal device performing time synchronization according to the synchronization instruction information includes:
  • the terminal device acquires a system time according to the cycle information and the offset value information, and updates the time of the terminal device according to the system time.
  • the synchronization instruction information includes an updated system time, or the synchronization instruction information includes a time adjustment amount of the system time.
  • the terminal device can perform time synchronization directly according to the updated system time in the synchronization instruction information, or the time adjustment of the system time, to avoid power consumption caused when the terminal device monitors the system information block including the system time.
  • the terminal device performing time synchronization according to the synchronization instruction information includes:
  • the terminal device updates the time of the terminal device according to the updated system time in the synchronization instruction information; or, the synchronization instruction information includes the
  • the terminal device updates the time of the terminal device according to the time adjustment amount of the system time in the synchronization instruction information.
  • the synchronization indication information is downlink control information DCI scrambled with RNTI
  • the method further includes: the terminal device receives the monitoring instruction information from the network device, and the monitoring instruction information is used To instruct the terminal device to monitor the DCI monitoring period; the terminal device monitors the DCI according to the monitoring period.
  • the terminal device monitors the DCI according to the monitoring period indicated by the monitoring instruction information, thereby avoiding power consumption caused by the terminal device frequently monitoring the DCI.
  • an embodiment of the present application provides a communication device.
  • the communication device includes a processor, and the processor is coupled to a memory, where the memory is used to store instructions; the processor is configured to execute the instructions stored in the memory and configured to: The method in the fourth aspect or any of the possible designs of the fourth aspect is performed.
  • the communication device may further include a transceiver for supporting the communication device to perform information transmission and / or reception in the foregoing method.
  • the communication device may be a terminal device or a device in the terminal device, such as a chip or a chip system, where the chip system includes at least one chip, and the chip system may further include other circuit structures and / or Discrete devices.
  • an embodiment of the present application provides a communication device, which is used to implement the fourth aspect or any one of the methods in the fourth aspect, and includes a corresponding functional module, such as a processing unit, a transceiver unit, and the like, which are respectively used for Implement the steps in the above method.
  • an embodiment of the present application provides a computer-readable storage medium, where the computer-readable instructions are stored in the computer storage medium, and when the computer reads and executes the computer-readable instructions, the computer is caused to execute any of the foregoing Aspect or any of the possible designs.
  • an embodiment of the present application provides a computer program product.
  • the computer reads and executes the computer program product, the computer is caused to execute the method in any one of the foregoing aspects or any one of the possible designs.
  • an embodiment of the present application provides a chip that is connected to a memory and is configured to read and execute a software program stored in the memory to implement any one of the foregoing aspects or any of the possible aspects. In design.
  • an embodiment of the present application provides a communication device including a processor, where the processor is configured to be coupled to a memory, and read and execute instructions in the memory to implement any one of the foregoing aspects or any of the aspects.
  • a communication device including a processor, where the processor is configured to be coupled to a memory, and read and execute instructions in the memory to implement any one of the foregoing aspects or any of the aspects.
  • an embodiment of the present application provides a communication system including the communication device in the second aspect and the communication device in the fifth aspect.
  • FIG. 1 is a schematic diagram of a system architecture applicable to an embodiment of the present application
  • FIG. 2 is a schematic diagram of a system time broadcast provided by an embodiment of the present application.
  • FIG. 3 is a schematic flowchart of a communication method according to an embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the embodiments of the present application can be applied to mobile communication systems of various standards, for example: a new radio (NR) system, a long term evolution (LTE) system, and an advanced long term evolution (LTE- A)
  • NR new radio
  • LTE long term evolution
  • LTE- A advanced long term evolution
  • the system, the evolved long term evolution (eLTE) system, and the future communication system are not limited here.
  • FIG. 1 exemplarily shows a schematic diagram of a system architecture applicable to an embodiment of the present application.
  • a network device can update the system time of the network device through a satellite, thereby maintaining the system time of the network device and the satellite The absolute time is the same.
  • the network device may also broadcast the system time, and the terminal device may update the time of the terminal device according to the system time broadcast by the network device.
  • FIG. 2 it is a schematic diagram of a system time broadcast provided by an embodiment of the present application.
  • the network device sends the system time via a system information block (SIB).
  • SIB system information block
  • the terminal device may not need to receive each SIB sent by the network device, and may only receive the SIB once after establishing a wireless connection with the network device, so as to perform time synchronization according to the system time in the SIB.
  • the network device updates the system time periodically. If the network device drifts due to the clock, the updated system time may change. For example, the period of time synchronization between the network device and the satellite is 10 seconds.
  • the current system time of the network equipment is 7:40:20 on April 13, 30 milliseconds, and 20 microseconds.
  • the network equipment is time synchronized with the satellite after 10 seconds, and the absolute time in the satellite is determined at 7:40 on April 13. 30 seconds, 30 milliseconds, and 25 microseconds, the system time in the network equipment is changed from 7:40:30, 30 seconds, 20 milliseconds, and 20 microseconds to the absolute time in the satellite on April 13, so as to synchronize with the absolute time.
  • the network device will update the system time in the next SIB. However, the terminal device cannot determine whether the network device updates the system time.
  • the SIB may not receive the SIB, which causes the difference between the time in the terminal device and the system time to be too large, which prevents the Guarantee business delay and reliability.
  • the terminal device is a device having a wireless transmitting / receiving function or a chip that can be set on the device.
  • the device with wireless transmitting and receiving function may also be called user equipment (UE), access terminal, user unit, user station, mobile station, remote station, remote terminal, mobile device, user terminal, user agent Or user device.
  • UE user equipment
  • the terminal device in the embodiments of the present application may be a mobile phone, a tablet, a computer with a wireless transceiver function, a virtual reality (VR) terminal, or augmented reality (AR) terminals, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grid, Wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, and the like.
  • the embodiment of the present application does not limit the application scenario.
  • the aforesaid devices with wireless transmitting and receiving functions and chips that can be set in the devices are collectively referred to as terminal devices.
  • the network device may be a wireless access device under various standards, such as an evolved Node B (eNB), a radio network controller (RNC), or a Node B (Node B).
  • eNB evolved Node B
  • RNC radio network controller
  • Node B Node B
  • BSC base station controller
  • BTS base transceiver station
  • home base station e.g., home NodeB, or home NodeB, HNB
  • BBU baseband unit
  • AP Access point
  • wireless relay node wireless backhaul node
  • TRP or transmission point, TP transmission point
  • WIFI wireless fidelity
  • It can also be a gNB or transmission point (TRP or TP) in a 5G (NR) system, an antenna panel or a group (including multiple antenna panels) of an antenna panel in a 5G system, or it can be a gNB or a transmission Point of network node, etc.
  • FIG. 3 it is a schematic flowchart of a communication method according to an embodiment of the present application.
  • the method includes:
  • Step 301 The network device determines synchronization instruction information, where the synchronization instruction information is used to indicate time synchronization of the terminal device.
  • Step 302 The network device sends the synchronization instruction information.
  • Step 303 The terminal device receives synchronization instruction information from the network device, where the synchronization instruction information is used to instruct the terminal device to perform time synchronization.
  • Step 304 The terminal device performs time synchronization according to the synchronization instruction information.
  • the synchronization indication information includes:
  • Cycle information which indicates an update cycle of a system time, or a synchronization cycle that instructs the terminal device to perform time synchronization
  • Offset value information indicating an offset value in the time domain of a time point of the system time update relative to a reference time point, or indicating a time point of the terminal device performing time synchronization with respect to a reference time The offset value of the point in the time domain;
  • the period information in the synchronization instruction information is not limited in the embodiment of the present application.
  • the period information may be a specific value of the update period of the system time, for example, 10 seconds.
  • the period information can also be the index value of the update period of the system time.
  • the index value of 10 seconds is 01.
  • the implementation manner of the offset value information in the synchronization instruction information is not limited in this embodiment of the present application.
  • the offset value information may be a specific value of the offset value directly, or an index of the indicated offset value. value.
  • the update accuracy information may be a specific value of the update accuracy directly, or may be an index value of the indicated update accuracy.
  • the specific values of the update period, offset value, and update accuracy of the system time may be determined according to actual conditions, for example, according to the period of time synchronization performed by the network device, and the details are not described herein again.
  • the offset value is 5 slots
  • the position of the system time update time point relative to the reference time point is T * i + 5 * t
  • T is the period
  • t is one time
  • the reference time point may be determined according to an actual situation, for example, a starting point of a radio frame with a system frame number (SFN) of 0 is used as the reference time point.
  • SFN system frame number
  • the update accuracy information in the synchronization instruction information may refer to the adjustment accuracy of the system time per cycle.
  • the update accuracy information is 0.5 ⁇ s, which means that if the terminal device does not perform time update during this cycle, the time between the terminal device and the system time is between There is a maximum error of 0.5 ⁇ s.
  • the unit of the update time of the system time, the offset value indicated by the offset value information, and the update precision indicated by the update accuracy information may also be other units.
  • the period may also be in the system information block including the system time.
  • the sending period is the unit, and the offset value can be the subframe.
  • the offset value can also be the number of the system information block where the system time update occurs for the first time after the radio frame with the SFN being 0. For example, the SFN is 0.
  • the system information block is sent three times.
  • the system time of the system information block sent for the third time is updated, and the offset value can be 3. Other details will not be described again.
  • the synchronization indication information may be sent through a system information block.
  • the belonging synchronization indication information may be sent through a system information block including a system time. That is, in step 302, the network The device sends the synchronization indication information through a system information block.
  • the system information block may be SIB16 or other SIBs, and details are not described herein again.
  • Sending the synchronization instruction information through the system information block can enable the terminal device to determine information such as the update period of the system time, so that the terminal device can determine whether to update the time according to the actual situation.
  • the terminal device may determine a difference between the time of the terminal device and the system time according to the period information and the update accuracy information.
  • the terminal device determines that the difference is greater than a threshold, obtain a system time according to the cycle information and the offset value, and update the time of the terminal device according to the system time.
  • the threshold value is a preset value, and is specifically set according to an actual situation, and details are not described herein again.
  • the terminal device determines, according to the period information and the update accuracy information in the synchronization instruction information, a time point at which the system time update is sent every period, and the update accuracy information.
  • the terminal device determines that the difference between the system time and the system time is very large according to the threshold value.
  • the system information block is monitored and the system time in the system information block is obtained. Accordingly, the terminal device determines the system time according to the threshold value. The difference is still very small.
  • the update time is not needed, the system information block can not be monitored, thereby avoiding the power consumption caused by monitoring the system information block each time.
  • the synchronization indication information may also be sent through radio resource control (radio resource control (RRC) signaling), that is, in step 302, the network device sends the synchronization indication information through RRC signaling, I will not repeat them here.
  • RRC radio resource control
  • the synchronization indication information includes:
  • Cycle information which indicates an update cycle of a system time, or a synchronization cycle that instructs the terminal device to perform time synchronization
  • Offset value information indicating an offset value in the time domain of a time point of the system time update relative to a reference time point, or indicating a time point of the terminal device performing time synchronization with respect to a reference time The offset value of the point in the time domain.
  • the synchronization indication information may be sent through a system information block or RRC signaling, that is, in step 302, the network equipment system information block or the synchronization indication information is sent through RRC signaling.
  • the synchronization indication information may also be sent through DCI, and details are not described herein again.
  • the terminal device obtains a system time according to the cycle information and the offset value information, and updates the time of the terminal device according to the system time. Specifically, the terminal device determines the position of the system information block in each cycle according to the offset value information, and periodically monitors the system information block including the system time according to the cycle information. When the terminal device monitors the system information block, the system time in the system information block is obtained, and the time of the terminal device is updated to the acquired system time, so that the time of the terminal device is updated.
  • the terminal device only needs to periodically update the time according to the periodic information in the synchronization instruction information, thereby achieving periodic time synchronization.
  • the synchronization indication information is a paging message.
  • the network device may send a paging message to the terminal device, where the paging message is used to indicate a change in system information, or used to instruct the terminal device to perform system time update, or used to instruct the UE to perform system time update.
  • the synchronization instruction information is also used to indicate that a system information block carrying a system time is updated.
  • the synchronization indication information is also used to indicate that the system time in the system information block carrying the system time is updated.
  • the synchronization indication information is used to indicate that an update of SIB16 occurs, or the synchronization indication information is used to indicate that an update of system time in SIB16 occurs.
  • the synchronization instruction information may also carry update accuracy, indicating the accuracy of the current time update. For example, if the update accuracy is 0.25 ⁇ s, it means that if the terminal device chooses not to perform time update, there is a maximum Time error of 0.25 ⁇ s.
  • the terminal device after receiving the paging message, the terminal device can determine that the system information has changed, so as to monitor and receive the system information block, and perform the time of the terminal device according to the system time in the system information block. Update.
  • the terminal device after receiving the paging message, the terminal device can immediately monitor and receive the system information block, instead of waiting for a period of time to monitor and receive the system information block. For example, the terminal device does not need to A system information window only started listening and receiving system information blocks.
  • the paging message may include an updated system time.
  • the terminal device may directly update the time of the terminal device according to the updated system time included in the paging message.
  • the paging message includes a time adjustment amount of a system time.
  • the terminal device may directly update the time of the terminal device according to the time adjustment amount of the system time included in the paging message.
  • the synchronization indication information is downlink control information (DCI) scrambled with a wireless network temporary identity (RNTI), and the RNTI may be a special RNTI.
  • DCI downlink control information
  • RNTI wireless network temporary identity
  • an unused RNTI may be reserved in the system, and the specific RNTI is determined according to actual conditions, and details are not described herein again.
  • Network equipment and terminal equipment can be agreed in advance. When DCI uses this RNTI for scrambling, it indicates that the system information has changed. It can be further agreed in advance that when DCI uses this RNTI for scrambling, it indicates that the system time has changed or updated.
  • the network device and the terminal device may agree in advance, and when the DCI is scrambled with the agreed RNTI, the system information block representing the system time is updated. Or, the system time in the system information block indicating that the system time is carried out is updated, or the terminal device is instructed to update the system time.
  • the synchronization instruction information may also carry update accuracy, indicating the accuracy of the current time update. For example, if the update accuracy is 0.25 ⁇ s, it means that if the terminal device chooses not to perform time update, there is a maximum Time error of 0.25 ⁇ s.
  • the terminal device determines that the system information has changed, thereby monitoring and receiving the system information block, and comparing the time of the terminal device with the system time in the system information block. Update.
  • the DCI scrambled with the agreed RNTI may include an updated system time.
  • the terminal device may directly update the time of the terminal device according to the updated system time in the DCI scrambled with the agreed RNTI.
  • the DCI scrambled with the agreed RNTI includes a time adjustment amount of a system time.
  • the terminal device may directly update the time of the terminal device according to the time adjustment amount of the system time included in the DCI scrambled with the agreed RNTI.
  • the DCI scrambled with the agreed RNTI may include downlink resource scheduling information, and the downlink resources scheduled by the downlink resource scheduling information include an updated system time or a time adjustment amount of the system time.
  • the terminal device may determine the downlink resource scheduling information according to the DCI scrambled by the RNTI, and further determine the updated system time or the time adjustment amount of the system time according to the downlink resources indicated by the downlink resource scheduling information, so that according to the updated system The time updates the time of the terminal device.
  • the network device may further send monitoring instruction information to the terminal device, where the monitoring instruction information is used to instruct the terminal device to monitor a monitoring period of the DCI.
  • the terminal device periodically monitors the DCI according to the monitoring period indicated by the monitoring instruction information, thereby implementing periodic time update.
  • an RNTI may also be introduced, and the RNTI is used for scheduling terminal equipment.
  • Group scheduling means that a group of terminal devices need to be scheduled at the same time.
  • a common RNTI is configured for terminal devices that require time synchronization, or for terminal devices with the same time accuracy requirements, and these terminal devices share this common RNTI.
  • the downlink resources scheduled by the public RNTI scrambled downlink control information carry time information update information.
  • the time information update information may be an updated system time or a time adjustment amount carrying the system time. After the system time of the network device is updated, it is found that the system time needs to be adjusted by +1 ⁇ s, that is, from 20 ⁇ s to 21 ⁇ s.
  • the network device can notify the terminal device of the updated system time, that is, 21 ⁇ s. That is, 1 ⁇ s is notified to the terminal device.
  • the network device performs time synchronization on the system time in the system information sent by the network device, and determines a difference from the difference between the system time before the time synchronization and the system time after the time synchronization.
  • RNTI corresponding to the value; the network device sends a DCI scrambled with the RNTI to a terminal device.
  • the terminal device After receiving the DCI scrambled by the RNTI, the terminal device determines a difference corresponding to the RNTI, where the difference is a difference between the system time before the time synchronization and the system time after the time synchronization. The terminal device thus updates the time of the terminal device according to the difference value.
  • the DCI can be scrambled by using different RNTIs to indicate different jumps in the system time.
  • the terminal device detects the DCI scrambled by the first RNTI, it considers that the system time jumps forward. Further, The transition granularity is considered to be 1 ⁇ s, so that the time of the terminal equipment is shifted forward by 1 ⁇ s; when the terminal equipment detects the DCI scrambled by the second RNTI, the system time is considered to be backward-shifted, and further, the transition granularity is considered to be 2 ⁇ s. Thus, the time of the terminal device is reversed by 2 ⁇ s.
  • the communication apparatus 400 includes a processing unit 401 and a transceiver unit 402.
  • the processing unit 401 and the transceiver unit 402 respectively perform the following steps:
  • a processing unit 401 configured to determine synchronization instruction information, where the synchronization instruction information is used to indicate time synchronization of a terminal device;
  • the transceiver unit 402 is configured to send the synchronization instruction information.
  • the synchronization indication information includes:
  • Cycle information which indicates an update cycle of a system time, or a synchronization cycle that instructs the terminal device to perform time synchronization
  • Offset value information indicating an offset value in the time domain of a time point of the system time update relative to a reference time point, or indicating a time point of the terminal device performing time synchronization with respect to a reference time The offset value of the point in the time domain.
  • the synchronization indication information further includes:
  • the transceiver unit 402 is specifically configured to:
  • the synchronization indication information is a paging message, or the synchronization indication information is downlink control information DCI scrambled using a wireless network temporary identifier RNTI.
  • the synchronization indication information includes an updated system time, or the synchronization indication information includes a time adjustment amount of a system time.
  • the synchronization indication information is downlink control information DCI scrambled with RNTI, and the transceiver unit 402 is specifically configured to:
  • the processing unit 401 and the transceiver unit 402 respectively perform the following steps:
  • the transceiver unit 402 is configured to receive synchronization instruction information from a network device, where the synchronization instruction information is used to instruct the terminal device to perform time synchronization;
  • the processing unit 401 is configured to perform time synchronization according to the synchronization instruction information.
  • processing unit 401 is specifically configured to:
  • the synchronization indication information is a paging message, or the synchronization indication information is downlink control information DCI scrambled using a wireless network temporary identifier RNTI.
  • the synchronization indication information includes:
  • Cycle information which indicates an update cycle of a system time, or a synchronization cycle that instructs the terminal device to perform time synchronization
  • Offset value information indicating an offset value in the time domain of a time point of the system time update relative to a reference time point, or indicating a time point of the terminal device performing time synchronization with respect to a reference time The offset value of the point in the time domain.
  • the synchronization indication information further includes:
  • the processing unit 401 is specifically configured to:
  • the synchronization instruction information includes an updated system time, or the synchronization instruction information includes a time adjustment amount of the system time.
  • processing unit 401 is specifically configured to:
  • the synchronization instruction information includes the updated system time, updating the time of the terminal device according to the updated system time in the synchronization instruction information;
  • the time of the terminal device is updated according to the time adjustment amount of the system time in the synchronization instruction information.
  • FIG. 5 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the communication device shown in FIG. 5 may be an implementation manner of a hardware circuit of the communication device shown in FIG. 4.
  • the terminal device may be applicable to the flowchart shown in FIG. 1 to execute the functions of the terminal device in the foregoing method embodiment.
  • FIG. 5 shows only the main components of the communication device.
  • the communication device may be a terminal device or a device in the terminal device, such as a chip or a chip system, where the chip system includes at least one chip, and the chip system may further include other circuit structures and / or Discrete devices.
  • the communication device 500 includes a processor 501, a memory 502, a transceiver 503, an antenna 504, and an input-output device 505.
  • the processor 501 is mainly used to process a communication protocol and communication data, and control the entire wireless communication device, execute a software program, and process data of the software program, for example, to support the wireless communication device to execute the method described in the foregoing method embodiment. Action, etc.
  • the memory 502 is mainly used to store software programs and data.
  • the transceiver 503 is mainly used for converting baseband signals and radio frequency signals and processing radio frequency signals.
  • the antenna 504 is mainly used for transmitting and receiving radio frequency signals in the form of electromagnetic waves.
  • the input / output device 505, such as a touch screen, a display screen, a keyboard, etc., is mainly used to receive data input by the user and output data to the user.
  • the transceiver 503 is configured to receive synchronization instruction information from a network device, where the synchronization instruction information is used to instruct the terminal device to perform time synchronization;
  • the processor 501 is configured to perform time synchronization according to the synchronization instruction information.
  • the processor 501 is specifically configured to:
  • the synchronization indication information is a paging message, or the synchronization indication information is downlink control information DCI scrambled using a wireless network temporary identifier RNTI.
  • the synchronization indication information includes:
  • Cycle information which indicates an update cycle of a system time, or a synchronization cycle that instructs the terminal device to perform time synchronization
  • Offset value information indicating an offset value in the time domain of a time point of the system time update relative to a reference time point, or indicating a time point of the terminal device performing time synchronization with respect to a reference time The offset value of the point in the time domain.
  • the synchronization indication information further includes:
  • the processor 501 is specifically configured to:
  • the processor 501 is specifically configured to:
  • the synchronization instruction information includes the updated system time, updating the time of the terminal device according to the updated system time in the synchronization instruction information;
  • the time of the terminal device is updated according to the system adjustment time amount of the system time.
  • FIG. 6 shows a schematic structural diagram of a communication device, which can be applied to the method shown in FIG. 1.
  • the communication device may be a network device or a device in the network device, such as a chip or a chip system, where the chip system includes at least one chip, and the chip system may further include other circuit structures and / or Discrete devices.
  • the communication device is a network device as an example.
  • the communication device 600 includes a processor 601, a memory 602, a transceiver 603, an antenna 604, and the like.
  • the above communication device 600 may be used to implement the method of the network device in the foregoing method embodiment, specifically:
  • the processor 601 is configured to determine synchronization instruction information, where the synchronization instruction information is used to indicate time synchronization of a terminal device;
  • the transceiver 603 is configured to send the synchronization instruction information.
  • the synchronization indication information includes:
  • Cycle information which indicates an update cycle of a system time, or a synchronization cycle that instructs the terminal device to perform time synchronization
  • Offset value information indicating an offset value in the time domain of a time point of the system time update relative to a reference time point, or indicating a time point of the terminal device performing time synchronization with respect to a reference time The offset value of the point in the time domain.
  • the synchronization indication information further includes:
  • the transceiver 603 is specifically configured to:
  • the synchronization indication information is a paging message, or the synchronization indication information is downlink control information DCI scrambled using a wireless network temporary identifier RNTI.
  • the synchronization indication information includes an updated system time, or the synchronization indication information includes a time adjustment amount of a system time.
  • the synchronization indication information is downlink control information DCI scrambled with RNTI, and the transceiver 603 is specifically configured to:

Abstract

本申请实施例提供一种通信方法及装置,其中方法包括:网络设备确定同步指示信息,所述同步指示信息用于指示终端设备的时间同步;所述网络设备发送所述同步指示信息。通过上述方法,网络设备通过同步指示信息指示终端设备的时间同步,使得终端设备可以及时根据同步指示信息进行时间同步,解决终端设备无法及时进行时间更新,导致与网络设备的时间不同步的问题。

Description

一种通信方法及装置
本申请要求在2018年8月9日提交国家专利局、申请号为201810903994.6、发明名称为“一种通信方法及装置”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域,尤其涉及一种通信方法及装置。
背景技术
在现有的移动通信系统,以及未来的第5代蜂窝移动通信系统(5th Generation,5G),即新无线(new radio,NR)中,为了保证超高可靠超低时延(ultra-reliability and low latency communication,URLLC)等业务的时延和可靠性,需要将数据包在网络中经过的每一个节点都进行时间同步。
目前,基站可以通过全球导航卫星系统(global navigation statellite system,GNSS)或1588协议进行时间同步。为了保证终端设备时间同步,基站可以通过向终端设备发送系统信息块(system information block,SIB)16,SIB16中包括时间信息,终端设备可以根据SIB16中的时间信息,与基站保持时间同步。为了降低终端设备的功耗等原因,终端设备不会监听并接收基站发送的所有SIB16。
由于基站的时钟精确度较低,存在时漂现象,因此基站需要不断的对基站的时间进行更新,从而保持时间同步。当基站纠正由于时漂导致的时间偏差时,基站的时间会发生跳变。基站的时间发生跳变之后,会通过SIB16通知终端设备。但是由于终端设备不会监听并接收基站发送的所有SIB16,终端设备无法及时进行时间更新,导致与基站的时间不同步,从而进一步导致URLLC等业务的时延和可靠性无法得到保证。
发明内容
本申请实施例提供一种通信方法及装置,用以解决终端设备无法及时进行时间更新,导致与基站的时间不同步的问题。
第一方面,本申请实施例提供一种通信方法,该方法包括:
网络设备确定同步指示信息,所述同步指示信息用于指示终端设备的时间同步;所述网络设备发送所述同步指示信息。
通过上述方法,网络设备通过同步指示信息指示终端设备的时间同步,使得终端设备可以及时根据同步指示信息进行时间同步,解决终端设备无法及时进行时间更新,导致与网络设备的时间不同步的问题。
一种可能的设计中,所述同步指示信息包括:
周期信息,所述周期信息指示系统时间的更新周期,或者指示所述终端设备进行时间同步的同步周期;偏移值信息,所述偏移值信息指示所述系统时间更新的时间点相对于基准时间点在时域上的偏移值,或者指示所述终端设备进行时间同步的时间点相对于基准时间点在时域上的偏移值。
一种可能的设计中,所述同步指示信息还包括:所述系统时间的更新精度信息。
通过上述方法,网络设备可以指示出系统时间每个周期的更新精度信息,从而可以使得终端设备确定终端设备的时间与系统时间之间的偏差。
一种可能的设计中,所述网络设备发送所述同步指示信息,包括:所述网络设备通过系统信息块发送所述同步指示信息;或者,所述网络设备通过无线资源控制RRC信令发送所述同步指示信息。
一种可能的设计中,所述同步指示信息为寻呼消息,或者所述同步指示信息为采用无线网络临时标识RNTI加扰的下行控制信息DCI。
通过上述方法,网络设备可以在保证与现有通信协议兼容的情况下,及时指示终端设备进行时间同步。
一种可能的设计中,所述同步指示信息中包括更新后的系统时间,或者,所述同步指示信息中包括系统时间的时间调整量。
通过上述方法,网络设备可以直接指示出更新后的系统时间,或者,系统时间的时间调整量,避免终端设备监听系统信息块时带来的功耗消耗。
一种可能的设计中,所述同步指示信息为采用RNTI加扰的下行控制信息DCI,所述方法还包括:所述网络设备向所述终端设备发送监听指示信息,所述监听指示信息用于指示监听所述DCI的监听周期。
通过上述方法,网络设备通过监听指示信息为终端设备设置监听周期,避免终端设备频繁监听DCI时带来的功耗消耗。
第二方面,本申请实施例提供一种通信装置,所述通信装置包括处理器,所述处理器与存储器耦合,其中:存储器用于存储指令;处理器用于根据执行存储器存储的指令,以执行上述第一方面或第一方面中任一种可能的设计中的方法。可选的,所述通信装置还可以包括收发器,用于支持所述通信装置进行上述方法中的信息发送和/或接收。可选的,该通信装置可以是网络设备,也可以是网络设备中的装置,如芯片或者芯片系统,其中所述芯片系统包含至少一个芯片,所述芯片系统还可以包括其他电路结构和/或分立器件。
第三方面,本申请实施例提供一种通信装置,用于实现上述第一方面或第一方面中的任意一种方法,包括相应的功能模块,例如包括接收单元、发送单元等,分别用于实现以上方法中的步骤。
第四方面,本申请实施例提供一种通信方法,包括:
终端设备接收来自网络设备的同步指示信息,所述同步指示信息用于指示所述终端设备进行时间同步;所述终端设备根据所述同步指示信息进行时间同步。
通过上述方法,终端设备根据同步指示信息进行时间同步,解决终端设备无法及时进行时间更新,导致与网络设备的时间不同步的问题。
一种可能的设计中,所述终端设备根据所述同步指示信息进行时间同步,包括:所述终端设备根据所述同步指示信息,接收系统信息块,并根据所述系统信息块中的系统时间对所述终端设备的时间进行更新。
一种可能的设计中,所述同步指示信息为寻呼消息,或者所述同步指示信息为采用无线网络临时标识RNTI加扰的下行控制信息DCI。
通过上述方法,终端设备在接收到寻呼消息,或者采用RNTI加扰的DCI时,可以确定需要进行时间同步,从而根据系统信息块中的系统时间对所述终端设备的时间进行更新。
一种可能的设计中,所述同步指示信息包括:
周期信息,所述周期信息指示系统时间的更新周期,或者指示所述终端设备进行时间同步的同步周期;和偏移值信息,所述偏移值信息指示所述系统时间更新的时间点相对于基准时间点在时域上的偏移值,或者指示所述终端设备进行时间同步的时间点相对于基准时间点在时域上的偏移值。
一种可能的设计中,所述同步指示信息还包括:所述系统时间的更新精度信息。
一种可能的设计中,所述终端设备根据所述同步指示信息进行时间同步,包括:
所述终端设备根据所述周期信息以及所述更新精度信息,确定所述终端设备的时间与所述系统时间之间的差值大于阈值,根据所述周期信息以及所述偏移值信息获取系统时间,并根据所述系统时间对所述终端设备的时间进行更新。
通过上述方法,终端设备可以根据阈值确定是否进行时间同步,避免了在每个周期进行时间同步时,导致的功耗消耗。
一种可能的设计中,所述终端设备根据所述同步指示信息进行时间同步,包括:
所述终端设备根据所述周期信息以及所述偏移值信息,获取系统时间,并根据所述系统时间对所述终端设备的时间进行更新。
一种可能的设计中,所述同步指示信息中包括更新后的系统时间,或者,所述同步指示信息中包括所述系统时间的时间调整量。
通过上述方法,终端设备可以直接根据同步指示信息中更新后的系统时间,或者,系统时间的时间调整量进行时间同步,避免终端设备监听包括系统时间的系统信息块时带来的功耗消耗。
一种可能的设计中,所述终端设备根据所述同步指示信息进行时间同步,包括:
所述同步指示信息中包括更新后的系统时间时,所述终端设备根据所述同步指示信息中更新后的系统时间对所述终端设备的时间进行更新;或者,所述同步指示信息中包括所述系统时间的时间调整量时,所述终端设备根据所述同步指示信息中所述系统时间的时间调整量对所述终端设备的时间进行更新。
一种可能的设计中,所述同步指示信息为采用RNTI加扰的下行控制信息DCI,所述方法还包括:所述终端设备接收来自所述网络设备的监听指示信息,所述监听指示信息用于指示所述终端设备监听所述DCI的监听周期;所述终端设备根据所述监听周期监听所述DCI。
通过上述方法,终端设备根据监听指示信息指示的监听周期监听DCI,避免终端设备频繁监听DCI时带来的功耗消耗。
第五方面,本申请实施例提供一种通信装置,所述通信装置包括处理器,所述处理器与存储器耦合,其中:存储器用于存储指令;处理器用于根据执行存储器存储的指令,用于执行上述第四方面或第四方面中任一种可能的设计中的方法。可选的,所述通信装置还可以包括收发器,用于支持所述通信装置进行上述方法中的信息发送和/或接收。可选的,该通信装置可以是终端设备,也可以是终端设备中的装置,如芯片或者芯片系统,其中所述芯片系统包含至少一个芯片,所述芯片系统还可以包括其他电路结构和/或分立器件。
第六方面,本申请实施例提供一种通信装置,用于实现上述第四方面或第四方面中的任意一种方法,包括相应的功能模块,例如包括处理单元、收发单元等,分别用于实现以上方法中的步骤。
第七方面,本申请实施例提供一种计算机可读存储介质,所述计算机存储介质中存储 有计算机可读指令,当计算机读取并执行所述计算机可读指令时,使得计算机执行上述任一方面或任一方面中任一种可能的设计中的方法。
第八方面,本申请实施例提供一种计算机程序产品,当计算机读取并执行所述计算机程序产品时,使得计算机执行上述任一方面或任一方面中任一种可能的设计中的方法。
第九方面,本申请实施例提供一种芯片,所述芯片与存储器相连,用于读取并执行所述存储器中存储的软件程序,以实现上述任一方面或任一方面中任一种可能的设计中的方法。
第十方面,本申请实施例提供一种通信装置,包括处理器,所述处理器用于与存储器耦合,读取并执行所述存储器中的指令,以实现上述任一方面或任一方面中任一种可能的设计中的方法。
第十一方面,本申请实施例提供一种通信系统,包括上述第二方面中的通信装置和第五方面的通信装置。
附图说明
图1为适用于本申请实施例的一种系统架构示意图;
图2为本申请实施例提供的一种系统时间广播示意图;
图3为本申请实施例提供的一种通信方法流程示意图;
图4为本申请实施例提供的一种通信装置结构示意图;
图5为本申请实施例提供的一种通信装置结构示意图;
图6为本申请实施例提供的一种通信装置结构示意图。
具体实施方式
下面结合说明书附图对本申请实施例做详细描述。
本申请实施例可以应用于各种制式的移动通信系统,例如:新无线(new radio,NR)系统、长期演进(long term evolution,LTE)系统、先进的长期演进(advanced long term evolution,LTE-A)系统、演进的长期演进(evolved long term evolution,eLTE)系统以及未来通信系统等,在此不做限制。
图1示例性示出了适用于本申请实施例的一种系统架构示意图,如图1所示,网络设备可以通过卫星对网络设备的系统时间进行更新,从而保持网络设备的系统时间与卫星上的绝对时间(absolute time)一致。网络设备还可以广播系统时间,终端设备可以根据网络设备广播的系统时间对终端设备的时间进行更新。
举例来说,如图2所示,为本申请实施例提供的一种系统时间广播示意图。网络设备通过系统信息块(system information block,SIB)发送系统时间。SIB可以是周期性发送的。终端设备可以不需要接收网络设备发送的每个SIB,可以只在与网络设备建立无线连接之后接收一次SIB,从而根据SIB中的系统时间进行时间同步即可。然而,网络设备会周期性的进行系统时间的更新,若网络设备由于时钟存在时漂,更新后的系统时间可能会产生跳变。例如,网络设备与卫星之间进行时间同步的周期为10秒。网络设备当前的系统时间为4月13日7时40分20秒30毫秒20微秒,网络设备10秒之后与卫星进行时间同步,并确定卫星中的绝对时间为4月13日7时40分30秒30毫秒25微秒,则将网络 设备中的系统时间由4月13日7时40分30秒30毫秒20微秒跳变到卫星中的绝对时间,从而实现与绝对时间同步。网络设备在接下来发送的SIB中会更新系统时间,然而终端设备无法确定网络设备是否更新系统时间,可能没有接收SIB,导致终端设备中的时间与系统时间之间的差值过大,从而无法保证业务的时延和可靠性。
在本申请实施例中,终端设备,为具有无线收发功能的设备或可设置于该设备的芯片。其中,所述具有无线收发功能的设备也可以称为用户设备(user equipment,UE)、接入终端、用户单元、用户站、移动站、远方站、远程终端、移动设备、用户终端、用户代理或用户装置。在实际应用中,本申请的实施例中的终端设备可以是手机(mobile phone)、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实(virtual reality,VR)终端、增强现实(augmented reality,AR)终端、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等等。本申请的实施例对应用场景不做限定。本申请中将前述具有无线收发功能的设备及可设置于该设备中的芯片统称为终端设备。
在本申请实施例中,网络设备可以为各种制式下无线接入设备,例如演进型节点B(evolved Node B,eNB)、无线网络控制器(radio network controller,RNC)或节点B(Node B,NB)、基站控制器(base station controller,BSC)、基站收发台(base transceiver station,BTS)、家庭基站(例如,home evolved NodeB,或home Node B,HNB)、基带单元(baseband unit,BBU),无线保真(wireless fidelity,WIFI)系统中的接入点(access point,AP)、无线中继节点、无线回传节点、传输点(transmission and reception point,TRP或者transmission point,TP)等,还可以为5G(NR)系统中的gNB或传输点(TRP或TP),5G系统中的基站的一个或一组(包括多个天线面板)天线面板,或者,还可以为构成gNB或传输点的网络节点等。
参见图3,为本申请实施例提供的一种通信方法流程示意图。
该方法包括:
步骤301:网络设备确定同步指示信息,所述同步指示信息用于指示终端设备的时间同步。
步骤302:所述网络设备发送所述同步指示信息。
步骤303:终端设备接收来自网络设备的同步指示信息,所述同步指示信息用于指示所述终端设备进行时间同步。
步骤304:所述终端设备根据所述同步指示信息进行时间同步。
本申请实施例中,同步指示信息可能存在多种形式,下面分别进行描述。
第一种可能的实现方式:所述同步指示信息包括:
周期信息,所述周期信息指示系统时间的更新周期,或者指示所述终端设备进行时间同步的同步周期;和
偏移值信息,所述偏移值信息指示所述系统时间更新的时间点相对于基准时间点在时域上的偏移值,或者指示所述终端设备进行时间同步的时间点相对于基准时间点在时域上的偏移值;
所述系统时间的更新精度信息。
其中,同步指示信息中周期信息的实现方式,本申请实施例对此并不限定,例如周期信息可以为系统时间的更新周期的具体取值,例如10秒。周期信息还可以为系统时间的更新周期的索引值,例如,10秒的索引值为01,周期信息为01时,表示系统时间的更新周期为10秒,其中系统时间的更新周期与索引值之间的关系为预设设定的,在此不再赘述。相应的,同步指示信息中偏移值信息的实现方式,本申请实施例对此并不限定,偏移值信息可以直接为偏移值的具体取值,也可以为指示的偏移值的索引值。更新精度信息可以直接为更新精度的具体取值,也可以为指示的更新精度的索引值。
本申请实施例中,系统时间的更新周期,偏移值,以及更新精度的具体取值,可以根据实际情况确定,例如根据网络设备进行时间同步的周期等确定,在此不再赘述。若偏移值为5个时隙(slot),则在第i个周期,系统时间更新的时间点相对于基准时间点的位置为T*i+5*t,T为周期,t为一个时隙的时长。基准时间点,可以根据实际情况确定,例如将系统帧号(system frame number,SFN)为0的无线帧的起始点作为基准时间点。
同步指示信息中的更新精度信息,可以是指每个周期系统时间的调整精度,例如更新精度信息为0.5μs,表示如果终端设备在该周期不进行时间更新,则终端设备的时间与系统时间之间存在最大0.5μs的误差。
本申请实施例中,系统时间的更新周期、偏移值信息指示的偏移值、更新精度信息指示的更新精度的单位也可以是其他单位,比如周期也可以以包括系统时间的系统信息块的发送周期为单位,偏移值可以以子帧为单位,偏移值还可以为SFN为0的无线帧之后的第一次发生系统时间更新的系统信息块的编号为单位,例如SFN为0的无线帧之后,系统信息块发送了三次,第三次发送的系统信息块的系统时间发生更新,偏移值就可以为3,其它情况不再赘述。
本申请实施例中,在该实现方式下,同步指示信息可以通过系统信息块发送,可选的,所属同步指示信息可以通过包括系统时间的系统信息块发送,即在步骤302中,所述网络设备通过系统信息块发送所述同步指示信息。所述系统信息块可以为SIB16,也可以为其它SIB,在此不再赘述。
通过系统信息块发送同步指示信息,可以使得终端设备确定系统时间的更新周期等信息,从而使得终端设备可以根据实际情况确定是否对时间进行更新。
具体的,在步骤304中,终端设备可以根据所述周期信息以及所述更新精度信息,确定所述终端设备的时间与所述系统时间之间的差值。当终端设备确定所述差值大于阈值时,根据所述周期信息以及所述偏移值获取系统时间,并根据所述系统时间对所述终端设备的时间进行更新。所述阈值为预设值,具体根据实际情况设置,在此不再赘述。
此时,在该实现方式下,终端设备根据同步指示信息中的周期信息以及更新精度信息,确定每个周期发送系统时间更新的时间点,以及更新精度信息。终端设备根据阈值,确定与系统时间的差值已经很大,从而需要更新时间时,才监听系统信息块,并获取系统信息块中的系统时间;相应的,终端设备根据阈值,确定与系统时间的差值还很小,不需要更新时间时,可以不用监听系统信息块,从而避免每次监听系统信息块造成的功耗消耗。
进一步的,在该实现方式下,同步指示信息还可以通过无线资源控制(radio resource control,RRC)信令发送,即在步骤302中,所述网络设备通过RRC信令发送所述同步指示信息,在此不再赘述。
第二种可能的实现方式:所述同步指示信息包括:
周期信息,所述周期信息指示系统时间的更新周期,或者指示所述终端设备进行时间同步的同步周期;和
偏移值信息,所述偏移值信息指示所述系统时间更新的时间点相对于基准时间点在时域上的偏移值,或者指示所述终端设备进行时间同步的时间点相对于基准时间点在时域上的偏移值。
上述周期信息、偏移值信息以及基准时间点的具体内容可以参考上面的描述,在此不再赘述。
在该实现方式下,同步指示信息可以通过系统信息块或者RRC信令发送,即在步骤302中,所述网络设备系统信息块或者通过RRC信令发送所述同步指示信息。
在该实现方式下,同步指示信息还可以通过DCI发送,在此不再赘述。
此时,在步骤304中,所述终端设备根据所述周期信息以及所述偏移值信息,获取系统时间,并根据所述系统时间对所述终端设备的时间进行更新。具体的,终端设备根据偏移值信息确定所述系统信息块在每个周期中的位置,并按照所述周期信息,周期性的监听包括系统时间的系统信息块。当终端设备监听到所述系统信息块,则获取系统信息块中的系统时间,并将终端设备的时间更新为获取到的系统时间,实现对所述终端设备的时间进行更新。
上述方法中,终端设备只需要按照同步指示信息中的周期信息,周期性的进行时间更新即可,从而实现周期性的时间同步。
第三种可能的实现方式:所述同步指示信息为寻呼消息(paging)。
当网络设备发送的系统信息块中的系统时间发生跳变,即由于误差等原因,系统信息块中的系统时间与绝对时间不一致,网络设备将系统信息块中的系统时间更新为与绝对时间一致的时间,导致系统信息块中的系统时间发生跳变。此时,网络设备可以向终端设备发送寻呼消息,所述寻呼消息用于指示系统信息发生变化,或者用于指示终端设备进行系统时间更新,或者用于指示UE进行系统时间更新。
进一步的,所述同步指示信息还用于指示携带系统时间的系统信息块发生更新。或者,所述同步指示信息还用于指示携带系统时间的系统信息块中的系统时间发生更新。比如,在LTE系统中,所述同步指示信息用于指示SIB16发生更新,或者所述同步指示信息用于指示SIB16中的系统时间发生更新。
进一步的,所述同步指示信息还可以携带更新精度,表示本次时间更新的精度,例如如果更新精度为0.25μs,则表示如果终端设备选择不进行时间更新,终端设备和网络设备之间存在最大0.25μs的时间误差。
在该实现方式下,终端设备在接收到寻呼消息之后,可以确定系统信息发生变化,从而监听并接收系统信息块,并根据所述系统信息块中的系统时间对所述终端设备的时间进行更新。
需要说明的是,本申请实施例中,终端设备在接收到寻呼消息之后,可以立刻监听并接收系统信息块,而不是等待一段时间后监听并接收系统信息块,比如,终端设备不需要在下一个系统信息窗口才开始监听并接收系统信息块。
进一步可选的,所述寻呼消息中可以包括更新后的系统时间。此时,终端设备可以直 接根据寻呼消息中包括的更新后的系统时间,对所述终端设备的时间进行更新。
进一步可选的,所述寻呼消息中包括系统时间的时间调整量。此时,终端设备可以直接根据寻呼消息中包括的系统时间的时间调整量,对所述终端设备的时间进行更新。
第四种可能的实现方式:所述同步指示信息为采用无线网络临时标识(radio network tempory identity,RNTI)加扰的下行控制信息(downlink control information,DCI),该RNTI可以为一个特殊的RNTI,例如可以为系统中预留不使用的RNTI,具体根据实际情况确定,在此不再赘述。网络设备与终端设备可以预先约定,当DCI采用该RNTI加扰时,表示系统信息发生变化,进一步可以预先约定,当DCI采用该RNTI加扰时,表示系统时间发生跳变或发生更新。
进一步的,网络设备与终端设备可以预先约定,当DCI采用约定的RNTI加扰时,表示携带系统时间的系统信息块发生更新。或者,表示携带系统时间的系统信息块中的系统时间发生更新,或者指示终端设备进行系统时间更新。
进一步的,所述同步指示信息还可以携带更新精度,表示本次时间更新的精度,例如如果更新精度为0.25μs,则表示如果终端设备选择不进行时间更新,终端设备和网络设备之间存在最大0.25μs的时间误差。
此时,终端设备在接收到采用约定的RNTI加扰的DCI之后,确定系统信息发生变化,从而监听并接收系统信息块,并根据所述系统信息块中的系统时间对所述终端设备的时间进行更新。
进一步可选的,所述采用约定的RNTI加扰的DCI中可以包括更新后的系统时间。此时,终端设备可以直接根据采用约定的RNTI加扰的DCI中的更新后的系统时间,对所述终端设备的时间进行更新。
进一步可选的,所述采用约定的RNTI加扰的DCI中包括系统时间的时间调整量。此时,终端设备可以直接根据采用约定的RNTI加扰的DCI中包括的系统时间的时间调整量,对所述终端设备的时间进行更新。
进一步可选的,所述采用约定的RNTI加扰的DCI中可以包括下行资源调度信息,所述下行资源调度信息调度的下行资源中包括更新后的系统时间或者系统时间的时间调整量。此时,终端设备可以根据采用RNTI加扰的DCI确定下行资源调度信息,并进一步根据下行资源调度信息指示的下行资源确定更新后的系统时间或者系统时间的时间调整量,从而根据更新后的系统时间对所述终端设备的时间进行更新。
进一步可选的,所述网络设备还可以向所述终端设备发送监听指示信息,所述监听指示信息用于指示所述终端设备监听所述DCI的监听周期。终端设备根据监听指示信息指示的监听周期,周期性的监听DCI,从而实现周期性的进行时间更新。
本申请实施例中,还可以引入一种RNTI,该RNTI是用于对终端设备进行调度的。组调度,就是需要同时调度一组终端设备,在本申请实施例中,为需要时间同步的终端设备,或者为时间精度需求相同的终端设备配置一个公共RNTI,这些终端设备共用这一个公共RNTI,该公共RNTI加扰的下行控制信息调度的下行资源,携带时间信息更新信息,可选的,所述时间信息更新信息可以是更新后的系统时间,也可以是携带系统时间的时间调整量,例如网络设备的系统时间更新后,发现系统时间需要调整+1μs,即从20μs调整为 21μs,网络设备可以将更新后的系统时间,即21μs通知给终端设备,也可以将系统时间的时间调整量,即1μs通知给终端设备。
进一步的,网络设备对所述网络设备发送的系统信息中的系统时间进行时间同步,并根据时间同步前的所述系统时间与时间同步后的所述系统时间的差值,确定与所述差值对应的RNTI;所述网络设备向终端设备发送采用所述RNTI加扰的DCI。
终端设备接收到采用RNTI加扰的DCI后,确定所述RNTI对应的差值,所述差值为时间同步前的所述系统时间与时间同步后的所述系统时间的差值。终端设备从而根据所述差值对所述终端设备的时间进行更新。
举例来说,可以通过使用不同的RNTI对DCI进行加扰,从而指示系统时间的不同跳变,例如当终端设备检测到第一RNTI加扰的DCI时,认为系统时间向前跳变,进一步,认为跳变粒度为1μs,从而将终端设备的时间向前跳变1μs;当终端设备检测到第二RNTI加扰的DCI,认为系统时间向后跳变,进一步的,认为跳变粒度为2μs,从而将终端设备的时间向后跳变2μs。
如图4所示,为本申请实施例提供一种通信装置的结构示意图。该通信装置可以用于执行上述各方法实施例中网络设备的动作,该通信装置400包括:处理单元401和收发单元402。
本申请实施例中,通信装置400执行图3所示的流程中的网络设备的动作时,处理单元401和收发单元402分别执行以下步骤:
处理单元401,用于确定同步指示信息,所述同步指示信息用于指示终端设备的时间同步;
收发单元402,用于发送所述同步指示信息。
一种可选地实施方式中,所述同步指示信息包括:
周期信息,所述周期信息指示系统时间的更新周期,或者指示所述终端设备进行时间同步的同步周期;和
偏移值信息,所述偏移值信息指示所述系统时间更新的时间点相对于基准时间点在时域上的偏移值,或者指示所述终端设备进行时间同步的时间点相对于基准时间点在时域上的偏移值。
一种可选地实施方式中,所述同步指示信息还包括:
所述系统时间的更新精度信息。
一种可选地实施方式中,所述收发单元402具体用于:
通过系统信息块发送所述同步指示信息;或者,通过无线资源控制RRC信令发送所述同步指示信息。
一种可选地实施方式中,所述同步指示信息为寻呼消息,或者所述同步指示信息为采用无线网络临时标识RNTI加扰的下行控制信息DCI。
一种可选地实施方式中,所述同步指示信息中包括更新后的系统时间,或者,所述同步指示信息中包括系统时间的时间调整量。
一种可选地实施方式中,所述同步指示信息为采用RNTI加扰的下行控制信息DCI,所述收发单元402具体用于:
向所述终端设备发送监听指示信息,所述监听指示信息用于指示监听所述DCI的监听 周期。
本申请实施例中,通信装置400执行图3所示的流程中的终端设备的动作时,处理单元401和收发单元402分别执行以下步骤:
收发单元402,用于接收来自网络设备的同步指示信息,所述同步指示信息用于指示所述终端设备进行时间同步;
处理单元401,用于根据所述同步指示信息进行时间同步。
一种可选地实施方式中,所述处理单元401具体用于:
根据所述同步指示信息,接收系统信息块,并根据所述系统信息块中的系统时间对所述终端设备的时间进行更新。
一种可选地实施方式中,所述同步指示信息为寻呼消息,或者所述同步指示信息为采用无线网络临时标识RNTI加扰的下行控制信息DCI。
一种可选地实施方式中,所述同步指示信息包括:
周期信息,所述周期信息指示系统时间的更新周期,或者指示所述终端设备进行时间同步的同步周期;和
偏移值信息,所述偏移值信息指示所述系统时间更新的时间点相对于基准时间点在时域上的偏移值,或者指示所述终端设备进行时间同步的时间点相对于基准时间点在时域上的偏移值。
一种可选地实施方式中,所述同步指示信息还包括:
所述系统时间的更新精度信息;
所述处理单元401具体用于:
根据所述周期信息以及所述更新精度信息,确定所述终端设备的时间与所述系统时间之间的差值大于阈值,根据所述周期信息以及所述偏移值信息获取系统时间,并根据所述系统时间对所述终端设备的时间进行更新。
一种可选地实施方式中,所述同步指示信息中包括更新后的系统时间,或者所述同步指示信息中包括所述系统时间的时间调整量。
一种可选地实施方式中,所述处理单元401具体用于:
所述同步指示信息中包括更新后的系统时间时,根据所述同步指示信息中更新后的系统时间对所述终端设备的时间进行更新;
或者,所述同步指示信息中包括所述系统时间的时间调整量时,根据所述同步指示信息中所述系统时间的时间调整量对所述终端设备的时间进行更新。
图5是本申请实施例提供的一种通信装置的结构示意图。图5所示的通信装置可以为图4所示的通信装置的一种硬件电路的实现方式。该终端设备可适用于图1所示出的流程图中,执行上述方法实施例中终端设备的功能。为了便于说明,图5仅示出了通信装置的主要部件。可选的,该通信装置可以是终端设备,也可以是终端设备中的装置,如芯片或者芯片系统,其中所述芯片系统包含至少一个芯片,所述芯片系统还可以包括其他电路结构和/或分立器件。可选的,以该通信装置为终端设备为例,如图5所示,通信装置500包括处理器501、存储器502、收发器503、天线504以及输入输出装置505。处理器501主要用于对通信协议以及通信数据进行处理,以及对整个无线通信装置进行控制,执行软件程序,处理软件程序的数据,例如用于支持无线通信装置执行上述方法实施例中所描述的 动作等。存储器502主要用于存储软件程序和数据。收发器503主要用于基带信号与射频信号的转换以及对射频信号的处理。天线504主要用于收发电磁波形式的射频信号。输入输出装置505,例如触摸屏、显示屏,键盘等主要用于接收用户输入的数据以及对用户输出数据。
收发器503,用于接收来自网络设备的同步指示信息,所述同步指示信息用于指示所述终端设备进行时间同步;
处理器501,用于根据所述同步指示信息进行时间同步。
一种可选地实施方式中,所述处理器501具体用于:
根据所述同步指示信息,接收系统信息块,并根据所述系统信息块中的系统时间对所述终端设备的时间进行更新。
一种可选地实施方式中,所述同步指示信息为寻呼消息,或者所述同步指示信息为采用无线网络临时标识RNTI加扰的下行控制信息DCI。
一种可选地实施方式中,所述同步指示信息包括:
周期信息,所述周期信息指示系统时间的更新周期,或者指示所述终端设备进行时间同步的同步周期;和
偏移值信息,所述偏移值信息指示所述系统时间更新的时间点相对于基准时间点在时域上的偏移值,或者指示所述终端设备进行时间同步的时间点相对于基准时间点在时域上的偏移值。
一种可选地实施方式中,所述同步指示信息还包括:
所述系统时间的更新精度信息;
所述处理器501具体用于:
根据所述周期信息以及所述更新精度信息,确定所述终端设备的时间与所述系统时间之间的差值大于阈值,根据所述周期信息以及所述偏移值信息获取系统时间,并根据所述系统时间对所述终端设备的时间进行更新。
一种可选地实施方式中,所述处理器501具体用于:
所述同步指示信息中包括更新后的系统时间时,根据所述同步指示信息中更新后的系统时间对所述终端设备的时间进行更新;
或者,所述同步指示信息中包括所述系统时间的时间调整量时,根据所述同步指示信息中所述系统时间的时间调整量对所述终端设备的时间进行更新。
图6示出一种通信装置的结构示意图,该通信装置可应用于如图1所示的方法。可选的,该通信装置可以是网络设备,也可以是网络设备中的装置,如芯片或者芯片系统,其中所述芯片系统包含至少一个芯片,所述芯片系统还可以包括其他电路结构和/或分立器件。可选的,以该通信装置为网络设备为例。如图6所示,通信装置600包括处理器601、存储器602、收发器603、天线604等。
上述通信装置600可以用于实现前述方法实施例中网络设备的方法,具体的:
处理器601,用于确定同步指示信息,所述同步指示信息用于指示终端设备的时间同步;
收发器603,用于发送所述同步指示信息。
一种可选地实施方式中,所述同步指示信息包括:
周期信息,所述周期信息指示系统时间的更新周期,或者指示所述终端设备进行时间 同步的同步周期;和
偏移值信息,所述偏移值信息指示所述系统时间更新的时间点相对于基准时间点在时域上的偏移值,或者指示所述终端设备进行时间同步的时间点相对于基准时间点在时域上的偏移值。
一种可选地实施方式中,所述同步指示信息还包括:
所述系统时间的更新精度信息。
一种可选地实施方式中,所述收发器603具体用于:
通过系统信息块发送所述同步指示信息;或者,通过无线资源控制RRC信令发送所述同步指示信息。
一种可选地实施方式中,所述同步指示信息为寻呼消息,或者所述同步指示信息为采用无线网络临时标识RNTI加扰的下行控制信息DCI。
一种可选地实施方式中,所述同步指示信息中包括更新后的系统时间,或者,所述同步指示信息中包括系统时间的时间调整量。
一种可选地实施方式中,所述同步指示信息为采用RNTI加扰的下行控制信息DCI,所述收发器603具体用于:
向所述终端设备发送监听指示信息,所述监听指示信息用于指示监听所述DCI的监听周期。
显然,本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的范围。这样,倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内,则本申请也意图包含这些改动和变型在内。

Claims (30)

  1. 一种通信方法,其特征在于,包括:
    网络设备确定同步指示信息,所述同步指示信息用于指示终端设备的时间同步;
    所述网络设备发送所述同步指示信息。
  2. 根据权利要求1所述的方法,其特征在于,所述同步指示信息包括:
    周期信息,所述周期信息指示系统时间的更新周期,或者指示所述终端设备进行时间同步的同步周期;和
    偏移值信息,所述偏移值信息指示所述系统时间更新的时间点相对于基准时间点在时域上的偏移值,或者指示所述终端设备进行时间同步的时间点相对于基准时间点在时域上的偏移值。
  3. 根据权利要求2所述的方法,其特征在于,所述同步指示信息还包括:
    所述系统时间的更新精度信息。
  4. 根据权利要求1至3任一所述的方法,其特征在于,所述网络设备发送所述同步指示信息,包括:
    所述网络设备通过系统信息块发送所述同步指示信息;
    或者,所述网络设备通过无线资源控制RRC信令发送所述同步指示信息。
  5. 根据权利要求1所述的方法,其特征在于,所述同步指示信息为寻呼消息,或者所述同步指示信息为采用无线网络临时标识RNTI加扰的下行控制信息DCI。
  6. 根据权利要求1至5任一所述的方法,其特征在于,所述同步指示信息中包括更新后的系统时间,或者,所述同步指示信息中包括系统时间的时间调整量。
  7. 根据权利要求5所述的方法,其特征在于,所述同步指示信息为采用RNTI加扰的下行控制信息DCI,所述方法还包括:
    所述网络设备向所述终端设备发送监听指示信息,所述监听指示信息用于指示监听所述DCI的监听周期。
  8. 一种通信方法,其特征在于,包括:
    终端设备接收来自网络设备的同步指示信息,所述同步指示信息用于指示所述终端设备进行时间同步;
    所述终端设备根据所述同步指示信息进行时间同步。
  9. 根据权利要求8所述的方法,其特征在于,所述终端设备根据所述同步指示信息进行时间同步,包括:
    所述终端设备根据所述同步指示信息,接收系统信息块,并根据所述系统信息块中的系统时间对所述终端设备的时间进行更新。
  10. 根据权利要求8或9所述的方法,其特征在于,所述同步指示信息为寻呼消息,或者所述同步指示信息为采用无线网络临时标识RNTI加扰的下行控制信息DCI。
  11. 根据权利要求8-10任一项所述的方法,其特征在于,所述同步指示信息包括:
    周期信息,所述周期信息指示系统时间的更新周期,或者指示所述终端设备进行时间同步的同步周期;和
    偏移值信息,所述偏移值信息指示所述系统时间更新的时间点相对于基准时间点在时域上的偏移值,或者指示所述终端设备进行时间同步的时间点相对于基准时间点在时域上 的偏移值。
  12. 根据权利要求11所述的方法,其特征在于,所述同步指示信息还包括:
    所述系统时间的更新精度信息。
  13. 根据权利要求12所述的方法,其特征在于,所述终端设备根据所述同步指示信息进行时间同步,包括:
    所述终端设备根据所述周期信息以及所述更新精度信息,确定所述终端设备的时间与所述系统时间之间的差值大于阈值,根据所述周期信息以及所述偏移值信息获取系统时间,并根据所述系统时间对所述终端设备的时间进行更新。
  14. 根据权利要求11所述的方法,其特征在于,所述终端设备根据所述同步指示信息进行时间同步,包括:
    所述终端设备根据所述周期信息以及所述偏移值信息,获取系统时间,并根据所述系统时间对所述终端设备的时间进行更新。
  15. 根据权利要求8-14任一所述的方法,其特征在于,所述同步指示信息中包括更新后的系统时间,或者,所述同步指示信息中包括所述系统时间的时间调整量。
  16. 根据权利要求8-15任一所述的方法,其特征在于,所述同步指示信息为采用RNTI加扰的下行控制信息DCI,所述方法还包括:
    所述终端设备接收来自所述网络设备的监听指示信息,所述监听指示信息用于指示所述终端设备监听所述DCI的监听周期;
    所述终端设备根据所述监听周期监听所述DCI。
  17. 一种通信装置,其特征在于,包括:
    处理单元,用于确定同步指示信息,所述同步指示信息用于指示终端设备的时间同步;
    收发单元,用于发送所述同步指示信息。
  18. 根据权利要求17所述的通信装置,其特征在于,所述同步指示信息包括:
    周期信息,所述周期信息指示系统时间的更新周期,或者指示所述终端设备进行时间同步的同步周期;和
    偏移值信息,所述偏移值信息指示所述系统时间更新的时间点相对于基准时间点在时域上的偏移值,或者指示所述终端设备进行时间同步的时间点相对于基准时间点在时域上的偏移值。
  19. 根据权利要求18所述的通信装置,其特征在于,所述同步指示信息还包括:
    所述系统时间的更新精度信息。
  20. 根据权利要求17至19任一所述的通信装置,其特征在于,所述收发单元具体用于:
    通过系统信息块发送所述同步指示信息;
    或者,通过无线资源控制RRC信令发送所述同步指示信息。
  21. 根据权利要求17至20任一所述的通信装置,其特征在于,所述同步指示信息为寻呼消息,或者所述同步指示信息为采用无线网络临时标识RNTI加扰的下行控制信息DCI。
  22. 根据权利要求17至21任一所述的通信装置,其特征在于,所述同步指示信息中包括更新后的系统时间,或者,所述同步指示信息中包括系统时间的时间调整量。
  23. 根据权利要求21所述的通信装置,其特征在于,所述同步指示信息为采用RNTI加扰的下行控制信息DCI,所述收发单元具体用于:
    向所述终端设备发送监听指示信息,所述监听指示信息用于指示监听所述DCI的监听周期。
  24. 一种通信装置,其特征在于,包括:
    收发单元,用于接收来自网络设备的同步指示信息,所述同步指示信息用于指示所述终端设备进行时间同步;
    处理单元,用于根据所述同步指示信息进行时间同步。
  25. 根据权利要求24所述的通信装置,其特征在于,所述处理单元具体用于:
    根据所述同步指示信息,接收系统信息块,并根据所述系统信息块中的系统时间对所述终端设备的时间进行更新。
  26. 根据权利要求24或25所述的通信装置,其特征在于,所述同步指示信息为寻呼消息,或者所述同步指示信息为采用无线网络临时标识RNTI加扰的下行控制信息DCI。
  27. 根据权利要求24-26任一项所述的通信装置,其特征在于,所述同步指示信息包括:
    周期信息,所述周期信息指示系统时间的更新周期,或者指示所述终端设备进行时间同步的同步周期;和
    偏移值信息,所述偏移值信息指示所述系统时间更新的时间点相对于基准时间点在时域上的偏移值,或者指示所述终端设备进行时间同步的时间点相对于基准时间点在时域上的偏移值。
  28. 根据权利要求26所述的通信装置,其特征在于,所述同步指示信息还包括:
    所述系统时间的更新精度信息;
    所述处理单元具体用于:
    根据所述周期信息以及所述更新精度信息,确定所述终端设备的时间与所述系统时间之间的差值大于阈值,根据所述周期信息以及所述偏移值信息获取系统时间,并根据所述系统时间对所述终端设备的时间进行更新。
  29. 一种通信装置,其特征在于,包括处理器,所述处理器用于与存储器耦合,读取并执行所述存储器中的指令,以实现如权利要求1至16中任一项所述的方法。
  30. 一种可读存储介质,其特征在于,包括程序或指令,当所述程序或指令被执行时,如权利要求1至16中任意一项所述的方法被执行。
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