WO2023082272A1 - 一种上行同步方法、装置及可读存储介质 - Google Patents

一种上行同步方法、装置及可读存储介质 Download PDF

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Publication number
WO2023082272A1
WO2023082272A1 PCT/CN2021/130727 CN2021130727W WO2023082272A1 WO 2023082272 A1 WO2023082272 A1 WO 2023082272A1 CN 2021130727 W CN2021130727 W CN 2021130727W WO 2023082272 A1 WO2023082272 A1 WO 2023082272A1
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Prior art keywords
reference information
compensation reference
uplink synchronization
system message
user equipment
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PCT/CN2021/130727
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English (en)
French (fr)
Inventor
江小威
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北京小米移动软件有限公司
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Application filed by 北京小米移动软件有限公司 filed Critical 北京小米移动软件有限公司
Priority to PCT/CN2021/130727 priority Critical patent/WO2023082272A1/zh
Priority to CN202180003815.3A priority patent/CN114270962A/zh
Publication of WO2023082272A1 publication Critical patent/WO2023082272A1/zh

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

Definitions

  • the present disclosure relates to the technical field of wireless communication, and in particular to an uplink synchronization method, device and readable storage medium.
  • non-terrestrial/ground network non-terrestrial networks
  • UE User Equipment
  • the 5G network needs to ensure the synchronization of uplink and downlink.
  • the uplink timing (timing) of receiving the uplink signal of the user equipment is delayed compared with the downlink timing of sending the downlink signal.
  • different UEs have different delays, so that the uplink time of different UEs is not aligned on the network device side, which will cause interference in sending data between UEs.
  • the network device sends a Timing Advance (TA) adjustment command to advance the uplink time of the UE by a certain time to ensure that the uplink time of all UEs arriving at the base station is aligned.
  • TA Timing Advance
  • the UE sends a preamble through a random access channel (Random Access Channel, RACH).
  • RACH Random Access Channel
  • the network device indicates the TA value through the random access message returned to the UE to adjust the UE's uptime.
  • the base station can determine the TA value according to the preamble sequence.
  • the delay difference between different UEs is larger, and the network equipment cannot directly determine the TA adjustment information of the UE's uplink time according to the preamble sequence, and the TA pre-compensation method is required.
  • the information related to TA pre-compensation has a corresponding valid time, and the UE will not be able to perform TA pre-compensation after expiration.
  • the present disclosure provides an uplink synchronization method, device and readable storage medium.
  • an uplink synchronization method which is executed by user equipment, including:
  • the TA pre-compensation reference information includes at least one of ephemeris information and common timing advance common TA.
  • the user equipment can actively obtain the system message carrying the TA pre-compensation reference information when the TA pre-compensation reference information fails, so as to re-learn the currently valid TA pre-compensation reference information, so as to be able to perform TA pre-compensation and ensure Uplink synchronization.
  • the user equipment can actively obtain the system information by initiating the radio link failure RLF procedure, and can also obtain the system information by initiating a non-RLF procedure, so that the user equipment in the connected state can obtain the TA pre-compensation by obtaining the system information Reference Information.
  • the initiating the RLF process or the non-RLF process to obtain the system message carrying the TA pre-compensation reference information includes:
  • the preset system message When the preset system message is invalid, initiate an RLF process or a non-RLF process to obtain a system message carrying the TA pre-compensation reference information; wherein the preset system message includes a system message carrying the TA pre-compensation reference information .
  • the method also includes:
  • the judging whether the system message carrying the TA pre-compensation reference information can be obtained includes:
  • Whether the preset system message can be acquired is judged based on an implementation process of the user equipment.
  • the judging whether the system message carrying the TA pre-compensation reference information can be obtained includes:
  • the system message for carrying the TA pre-compensation reference information is not obtained, and it is determined that the system message for carrying the TA pre-compensation reference information cannot be obtained.
  • the method also includes:
  • the method also includes:
  • the RRC layer notifies the MAC layer after the uplink synchronization valid timer expires, so that the user equipment stops performing uplink transmission.
  • the method also includes:
  • the RRC layer notifies the PHY layer after the uplink synchronization valid timer expires, so that the PHY layer does not perform any uplink transmission.
  • the method also includes:
  • the RRC layer After the uplink synchronization effective timer expires, the RRC layer sends notification information indicating that the uplink synchronization effective timer expires to the MAC layer, so that the MAC layer does not perform any uplink transmission except random access, wherein,
  • the random access is a random access in response to obtaining the latest TA pre-compensation reference information.
  • the method also includes:
  • the method also includes:
  • the method also includes:
  • the uplink synchronization valid timer After the uplink synchronization valid timer expires, in response to the MAC layer receiving the notification information sent by the RRC layer for indicating that the uplink synchronization valid timer expires, perform at least one of the following operations:
  • the method also includes:
  • timeout-related information of the uplink synchronization valid timer to the network device; wherein the timeout-related information includes at least one of the following:
  • the method also includes:
  • the user equipment returns to the idle state after executing the process of leaving the connected state.
  • the method also includes:
  • Random access is triggered after acquiring the SIB.
  • an uplink synchronization method which is executed by the first network device, including: sending bearer TA pre-compensation reference information to the user equipment in response to the user equipment initiating an RLF procedure or a non-RLF procedure system message; wherein, the TA pre-compensation reference information includes at least one of ephemeris information and a common timing advance common TA, and the user equipment is used for uplink synchronization related to the timing advance TA pre-compensation reference information The valid timer expires, and after determining that the TA pre-compensation reference information is invalid, an RLF process or a non-RLF process is initiated.
  • the first network device can send a system message carrying TA pre-compensation reference information for the user equipment at an appropriate time, so that the user equipment can perform TA pre-compensation according to the newly acquired TA pre-compensation reference information to ensure Uplink synchronization.
  • the method also includes:
  • timeout related information of the uplink synchronization valid timer sent by the user equipment includes at least one of the following:
  • a communication device is provided.
  • the communication apparatus may be used to execute the steps performed by the user equipment in the above first aspect or any possible design of the first aspect.
  • the user equipment can implement each function in the above methods in the form of a hardware structure, a software module, or a hardware structure plus a software module.
  • the communication device may include a transceiver module, where the transceiver module may be used to support the communication device to perform communication.
  • the transceiver module is configured to determine that the TA pre-compensation reference information is invalid in response to the timeout of the uplink synchronization valid timer related to the timing advance TA pre-compensation reference information, and initiate the RLF process or non-RLF The process obtains a system message carrying the TA pre-compensation reference information; wherein the TA pre-compensation reference information includes at least one of ephemeris information and common timing advance common TA.
  • a communication device may be used to execute the steps executed by the network device in the above second aspect or any possible design of the second aspect.
  • the network device can realize each function in the above-mentioned methods in the form of a hardware structure, a software module, or a hardware structure plus a software module.
  • the communication device may include a transceiver module, wherein the transceiver module may be used to support the communication device to perform communication.
  • the transceiver module is configured to send a system message carrying TA pre-compensation reference information to the user equipment in response to the user equipment initiating an RLF procedure or a non-RLF procedure; wherein, the TA pre-compensation reference The information includes at least one of ephemeris information and common timing advance common TA, and the user equipment is used to determine that the TA pre-compensation reference information is invalid when the uplink synchronization valid timer related to the timing advance TA pre-compensation reference information expires After that, initiate the RLF process or the non-RLF process.
  • a communication device including a processor and a memory; the memory is used to store a computer program; the processor is used to execute the computer program, so as to realize the first aspect or the first Any possible design of the aspect.
  • a communication device including a processor and a memory; the memory is used to store a computer program; the processor is used to execute the computer program, so as to realize the second aspect or the second Any possible design of the aspect.
  • a computer-readable storage medium stores instructions (or called computer programs, programs), and when they are invoked and executed on a computer, the The computer implements the above first aspect or any possible design of the first aspect.
  • a computer-readable storage medium stores instructions (or called computer programs, programs), and when they are invoked and executed on a computer, the The computer implements the second aspect or any possible design of the second aspect.
  • FIG. 1 is a schematic diagram of a non-terrestrial network system architecture provided by an embodiment of the present disclosure
  • FIG. 2 is an information diagram of satellites in a non-terrestrial network provided by an embodiment of the present disclosure
  • FIG. 3 is a schematic diagram of a transparent transmission mode in a non-terrestrial network provided by an embodiment of the present disclosure
  • Fig. 4 is a schematic diagram of a regenerative mode in a non-terrestrial network provided by an embodiment of the present disclosure
  • Fig. 5 is a flow chart showing an uplink synchronization method according to an exemplary embodiment
  • Fig. 6 is a flow chart showing an uplink synchronization method according to another exemplary embodiment
  • Fig. 7 is a schematic diagram of an uplink synchronization device according to an exemplary embodiment
  • Fig. 8 is a schematic diagram of another uplink synchronization device according to an exemplary embodiment
  • Fig. 9 is a schematic diagram of another uplink synchronization device according to an exemplary embodiment.
  • Fig. 10 is a schematic diagram of another uplink synchronization device according to an exemplary embodiment.
  • FIG. 1 shows the architecture of a possible non-terrestrial/terrestrial network system to which the embodiment of the present application is applicable.
  • the system 100 may be composed of a user equipment 101 , a first network device 102 and a second network device 103 .
  • the communication link between the first network device 102 and the second network device 103 is a feeder link;
  • the communication link between the second network device 103 and the user equipment 101 is a service link (service link) ).
  • the user equipment 101 may be a wireless terminal equipment capable of receiving network equipment scheduling and instruction information, such as equipment used to provide users with voice and/or data connectivity, or a handheld device with a wireless connection function, or a device connected to a wireless modem other processing equipment.
  • the user equipment 101 can communicate with one or more core networks or the Internet via a radio access network (such as radio access network, RAN), and the wireless terminal equipment can be a mobile terminal equipment, such as a mobile phone (or called a "cellular" phone , mobile phone (mobile phone)), computer and user equipment 101 communication chips, for example, can be portable, pocket, handheld, computer built-in or vehicle-mounted mobile devices, which can exchange language and/or data with the wireless access network .
  • a radio access network such as radio access network, RAN
  • RAN radio access network
  • the wireless terminal equipment can be a mobile terminal equipment, such as a mobile phone (or called a "cellular" phone , mobile phone (mobile phone)), computer and user equipment 101 communication chips, for example, can be portable, pocket
  • the terminal may be a personal communication service (personal communication service, PCS) phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital assistant (personal digital assistant, PDA) , Tablet PC (Pad), computer with wireless transceiver function and other equipment.
  • PCS personal communication service
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • Tablet PC Tablet PC
  • the terminal may also include a subscriber unit (subscriber unit), a subscriber station (subscriber station), a mobile station (mobile station), a mobile station (mobile station, MS), a remote station (remote station), an access point (access point, AP) , remote terminal equipment (remote terminal), access terminal equipment (access terminal), user terminal equipment (user terminal), user agent (user agent), subscriber station (subscriber station, SS), customer premises equipment (customer premises equipment, CPE), terminal (terminal), mobile terminal (mobile terminal, MT), etc.
  • subscriber unit subscriber unit
  • subscriber station subscriber station
  • a mobile station mobile station
  • mobile station mobile station
  • MS mobile station
  • a remote station remote station
  • an access point access point
  • remote terminal equipment remote terminal equipment
  • access terminal equipment access terminal
  • user terminal equipment user terminal
  • user agent user agent
  • subscriber station subscriber station
  • SS customer premises equipment
  • CPE customer premises equipment
  • terminal terminal
  • mobile terminal mobile terminal
  • the wireless terminal device can also be a wearable device and a next-generation communication system, for example, a terminal device in a 5G network or a terminal device in a public land mobile network (PLMN) network evolved in the future, or a terminal device in an NR communication system. terminal equipment, etc.
  • PLMN public land mobile network
  • the first network device 102 may be a gateway station or called a ground station, an earth station, or a gateway, and may be used to connect the second network device 103 and the core network.
  • the second network device 103 may be a satellite (or satellite base station), a geostationary earth orbit (GEO) satellite, a non-geostationary earth orbit (NGEO) medium earth orbit (MEO) satellite and Low earth orbit (LEO) satellites, high altitude platform stations (HAPS), etc., are not limited here. As shown in FIG. 2 , it is the altitude, orbit and coverage of the satellite 103 in a typical NTN.
  • GEO geostationary earth orbit
  • NGEO non-geostationary earth orbit
  • MEO medium earth orbit
  • LEO Low earth orbit
  • HAPS high altitude platform stations
  • the signal processing mode of the second network device 103 such as a satellite includes a transparent transmission mode and a regeneration mode.
  • FIG. 3 is a schematic diagram of a transparent transmission mode
  • FIG. 4 is a schematic diagram of a regeneration mode.
  • the NTN ground station 102 sends the gNB signal to the satellite 103, and the satellite 103 first converts the received signal to the satellite frequency band, and then sends the satellite frequency band signal to the UE.
  • the satellite 103 is similar to a repeater, except for frequency conversion and signal amplification, it does not demodulate the gNB signal.
  • the NTN ground station 102 sends the gNB signal to the satellite 103, and the satellite 103 first demodulates and decodes the signal and then re-encodes and modulates (that is, the regeneration process), and then the satellite 103 transmits the signal through the satellite
  • the frequency band transmits the reproduced signal to UE101.
  • downlink synchronization is achieved by UE 101 receiving a downlink synchronization signal sent by network device 103 . After obtaining the downlink synchronization, the UE needs to perform uplink synchronization to ensure that the time when all UE uplink signals arrive at the network device is aligned with the uplink time of the network device.
  • Uplink synchronization is obtained by UE initiating random access.
  • UE101 sends the preamble to the network device, and the network device obtains the transmission delay between the UE and the network device by receiving the preamble, and then the network device sends a Timing Advance (TA) command to the UE.
  • TA Timing Advance
  • the TA value is equal to twice the transmission delay, and the UE advances the uplink according to the value indicated by the TA to obtain uplink synchronization.
  • the downlink timing (timing) for the UE to receive the downlink signal will be delayed by a one-way propagation delay time compared with the time for the base station to send the downlink signal.
  • the uplink signal needs to go through a one-way propagation delay before reaching the network device. Therefore, for the network device, the uplink time of receiving the UE uplink signal is delayed by a round-trip time delay (Round-Trip Time, RTT) compared with the downlink time of sending the downlink signal.
  • the RTTs corresponding to different UEs are different, so that the uplink times of different UEs are not aligned on the network device side, resulting in interference in sending data between UEs.
  • the network device can send the TA adjustment command to advance the uplink time of the UE by a corresponding RTT time, so as to ensure that the uplink time of all UEs arriving at the base station side is aligned.
  • the network device needs to know the sending RO corresponding to the received preamble when receiving the preamble, so as to Correctly address the random access request when receiving a response, and perform uplink timing adjustment.
  • the maximum RTT allowed by the preamble sequence design in TN is 0.68ms (corresponding to 100km coverage radius), which is less than one subframe. Therefore, the subframe in which the network device receives the preamble is the same as the RO subframe corresponding to the sending of the preamble, and the uplink timing deviation can be obtained through the subframe boundary deviation. After determining the uplink timing deviation, the timing advance TA amount can be determined.
  • the RTT difference between different UEs 101 reaching the first network device 102 can reach up to 10.3ms, that is, the delay difference between different UEs is larger, and the first network device 102 cannot infer the RO it sends from the received preamble sequence. Subframe and uplink timing deviation. Unless the interval between ROs is greater than the maximum round-trip delay difference, so as to ensure that the preamble receiving windows of different ROs do not overlap, but this situation will bring great restrictions on RO resources.
  • the ambiguity of preamble reception involved in NTN can be adjusted through TA pre-compensation, that is, before UE101 sends the preamble, the uplink time (UL timing) of UE101 is adjusted according to the RTT between UE101 and the first network device 102 The advance is made to ensure that the time difference between the preamble sequences sent by different UEs using the same RO and arriving at the base station is limited within one subframe.
  • the RTT from UE101 to first network device 102 includes two parts: one part is the RTT of the service link between UE101 and satellite 103, which is the UE specific TA part; the other part is between satellite 103 and first network device 102
  • the RTT of the feedback link, this part is the common timing advance (common TA) part.
  • a part of the common TA part can be compensated by the first network device 102, and another part of the common TA part can be compensated by the UE101.
  • the part compensated by UE101 is sent to UE101 by first network device 102 through a system message.
  • the first network device 102 will also broadcast the ephemeris information of the satellite to help the UE101 obtain the position of the satellite 103 so as to calculate the RTT from the UE101 to the satellite 103. Due to the mobility of the satellite, the common TA and ephemeris information will change, so the ephemeris information and common TA broadcast in the system message (SIB) will have an uplink synchronization validity timer (UL synchronization validity timer).
  • SIB system message
  • a UE in a connected state such as an IOT terminal
  • the uplink synchronization valid timer expires, it means that the ephemeris information and common TA information previously received from the SIB has become invalid, so that the UE101 will no longer be able to obtain the position of the satellite 103, and cannot calculate the RTT from the UE101 to the satellite 103.
  • TA pre-compensation will eventually lead to uplink out-of-synchronization (UL synchronization loss).
  • the UE After the UL synchronization loss, the UE needs to re-acquire the SIB. However, since the UE does not support the acquisition of the SIB in the connected state except for RLF, it is proposed to re-acquire the SIB through the UE to initiate the RLF process or a new process.
  • FIG. 5 is a flowchart of an uplink synchronization method according to an exemplary embodiment. As shown in FIG. 5, the method includes:
  • Step S501 the user equipment 101 responds to the timeout of the uplink synchronization valid timer related to the timing advance TA pre-compensation reference information, determines that the TA pre-compensation reference information is invalid, and initiates an RLF process or a non-RLF process to obtain the system carrying the TA pre-compensation reference information message; wherein, the TA pre-compensation reference information includes at least one of ephemeris information and common timing advance common TA.
  • Step S502 the first network device 102 sends a system message carrying TA pre-compensation reference information to the user equipment 101 in response to the user equipment 101 initiating an RLF process or a non-RLF process, wherein the TA pre-compensation reference information includes ephemeris information and public timing At least one of common TA in advance.
  • the system information includes a master information block (Master Information Block, MIB) and multiple system information blocks (System Information Blocks, SIB).
  • MIB Master Information Block
  • SIB System Information Blocks
  • the user equipment 101 when the TA pre-compensation reference information fails, the user equipment 101 can actively obtain the system message carrying the TA pre-compensation reference information from the first network device 102, so as to be able to obtain the currently valid TA pre-compensation reference information again, In order to be able to perform TA pre-compensation to ensure uplink synchronization.
  • the user equipment 101 can obtain the system message actively by initiating the RLF process, or obtain the system message by initiating a non-RLF process, so that all user equipments in the connected state can obtain the TA pre-compensation reference information by obtaining the system message.
  • FIG. 6 is a flowchart of an uplink synchronization method according to an exemplary embodiment. As shown in FIG. 6, the method includes:
  • Step S601 the user equipment 101 responds to the timeout of the uplink synchronization valid timer related to the timing advance TA pre-compensation reference information, determines that the TA pre-compensation reference information is invalid, and initiates an RLF process or a non-RLF process to obtain the system carrying the TA pre-compensation reference information message; wherein, the TA pre-compensation reference information includes at least one of ephemeris information and common timing advance common TA.
  • the user equipment 101 will start an uplink synchronization validity timer (UL synchronization validity time) according to the ephemeris information in the system message and the initial effective time (epoch time) corresponding to the common TA.
  • UL synchronization validity time UL synchronization validity time
  • the TA pre-compensation reference information includes ephemeris information and common TA.
  • the ephemeris information and the common TA are carried in the same system message, and the ephemeris information and the common TA share an uplink synchronization valid timer.
  • the ephemeris information and the common TA are carried in different system messages, the ephemeris information corresponds to an uplink synchronization valid timer, and the common TA corresponds to another uplink synchronization valid timer.
  • the TA pre-compensation reference information includes ephemeris information.
  • the user equipment 101 can determine the position of the satellite 103 according to the ephemeris information so as to calculate the RTT between the user equipment 101 and the satellite 103 .
  • the TA pre-compensation reference information includes common TA.
  • the user equipment 101 can proactively obtain the system message carrying the TA pre-compensation reference information from the first network device 102, so as to obtain the currently valid TA pre-compensation reference information again, In order to be able to perform TA pre-compensation to ensure uplink synchronization.
  • the user equipment 101 can obtain the system message actively by initiating the RLF process, or obtain the system message by initiating a non-RLF process, so that all user equipments in the connected state can obtain the TA pre-compensation reference information by obtaining the system message.
  • the embodiment of the present disclosure provides an uplink synchronization method, which is executed by the user equipment 101 .
  • This method includes:
  • step S601-1 the user equipment 101 determines that the TA pre-compensation reference information is invalid in response to the timeout of the uplink synchronization valid timer related to the timing advance TA pre-compensation reference information.
  • the preset system message fails, initiate an RLF process or a non-RLF process to obtain a system message carrying TA pre-compensation reference information; wherein, the TA pre-compensation reference information includes at least one of ephemeris information and common timing advance common TA ;
  • the preset system message includes a system message carrying the TA pre-compensation reference information.
  • the preset system message includes a system message carrying TA pre-compensation reference information.
  • the preset system message includes SIB1 and a system message carrying TA pre-compensation reference information.
  • the preset system messages include MIB, SIB1, and system messages carrying TA pre-compensation reference information.
  • the user equipment 101 may obtain the latest preset system message.
  • the user equipment 101 only needs to obtain the system message carrying the TA pre-compensation reference information, and only needs to ensure the validity of the system message.
  • the system message carrying the TA pre-compensation reference information may be one of the following: MIB, SIB1, SIB2, and SIB-22-NB of a narrowband Internet of Things (NB-IOT) terminal.
  • step S701 further includes: there is no need to ensure that the system message that does not carry the TA pre-compensation reference information is valid.
  • MIB, SIB1, SIB2, and SIB-22-NB of a narrowband Internet of Things (NB-IOT) terminal do not carry ephemeris information and common timing advance common TA, there is no need to ensure that MIB, SIB1, SIB2, and SIB-22-NB is valid for Narrowband Internet of Things (NB-IOT) terminals.
  • NB-IOT narrowband Internet of Things
  • a preset system message is set.
  • the uplink synchronization valid timer expires, when the preset system message is invalid, an RLF process or a non-RLF process is initiated to obtain a system message carrying TA pre-compensation reference information .
  • the embodiment of the present disclosure provides an uplink synchronization method, which is executed by the user equipment 101 .
  • the preset system message is a system message carrying the TA pre-compensation reference information, and this method includes:
  • Step S701 in response to the expiration of the uplink synchronization valid timer related to the timing advance TA pre-compensation reference information, determine that the TA pre-compensation reference information is invalid.
  • Step S702 when the system message carrying the TA pre-compensation reference information fails, initiate an RLF process or a non-RLF process to obtain the system message carrying the TA pre-compensation reference information; wherein, the TA pre-compensation reference information includes ephemeris information and public timing advance At least one of the common TAs.
  • the system message carrying the TA pre-compensation reference information may be one of the following: MIB, SIB1, SIB2, and SIB-22-NB of a narrowband Internet of Things (NB-IOT) terminal.
  • step S701 also includes: there is no need to ensure that the system message that does not carry the TA pre-compensation reference information is valid.
  • MIB, SIB1, SIB2, and SIB-22-NB of a narrowband Internet of Things (NB-IOT) terminal do not carry ephemeris information and common timing advance common TA, there is no need to ensure that MIB, SIB1, SIB2, and SIB-22-NB is valid for Narrowband Internet of Things (NB-IOT) terminals.
  • NB-IOT narrowband Internet of Things
  • the user equipment 101 needs to ensure the validity of the system message carrying the TA pre-compensation reference information, but for the system message that does not carry the TA pre-compensation reference information, the user equipment 101 does not need to ensure or maintain the validity of the system message sex.
  • the embodiment of the present disclosure provides an uplink synchronization method, which is executed by the user equipment 101 .
  • the preset system message is a system message carrying the TA pre-compensation reference information, and this method includes the following steps:
  • Step S701 in response to the expiration of the uplink synchronization valid timer related to the timing advance TA pre-compensation reference information, determine that the TA pre-compensation reference information is invalid.
  • Step S703 when the MIB or SIB1 fails, and, based on the MIB or SIB1, acquire a system message for carrying TA pre-compensation reference information.
  • the system message carrying the TA pre-compensation reference information fails, an RLF procedure or a non-RLF procedure is initiated based on MIB or SIB1.
  • the user equipment 101 when the MIB or SIB1 fails, the user equipment 101 tries to acquire the SIB carrying the TA pre-compensation reference information based on the failed MIB or SIB1.
  • the user equipment 101 when the user equipment 101 fails to obtain the SIB carrying the TA pre-compensation reference information based on the invalid MIB or SIB1, it may obtain the SIB carrying the TA pre-compensation reference information after reacquiring the MIB or SIB1.
  • the user equipment 101 may obtain the system message carrying the TA pre-compensation reference information according to the invalidated MIB or SIB1.
  • the embodiment of the present disclosure provides an uplink synchronization method, which is executed by the user equipment 101 .
  • the preset system messages are MIB, SIB1 and system messages carrying TA pre-compensation reference information.
  • This method includes:
  • Step S801 in response to the expiration of the uplink synchronization valid timer related to the timing advance TA pre-compensation reference information, determine that the TA pre-compensation reference information is invalid.
  • Step S802 when any one of MIB, SIB1 and the system message carrying the TA pre-compensation reference information fails, initiate the RLF process or the non-RLF process to obtain the system message carrying the TA pre-compensation reference information; wherein, the TA pre-compensation reference information Including at least one of ephemeris information and common timing advance common TA.
  • the preset system messages include MIB, SIB1 and system messages for carrying TA pre-compensation reference information.
  • MIB and SIB1 do not carry ephemeris information and common TA.
  • SIB2 and the SIB-22-NB of the NB-IOT terminal do not carry ephemeris information and common TA, the validity of SIB2 and SIB-22-NB does not need to be guaranteed.
  • the embodiment of the present disclosure provides an uplink synchronization method, which is executed by the user equipment 101 .
  • the preset system message is SIB1 and the system message carrying TA pre-compensation reference information.
  • This method includes:
  • Step S901 in response to the expiration of the uplink synchronization validity timer related to the timing advance TA pre-compensation reference information, determine that the TA pre-compensation reference information is invalid.
  • Step S902 when SIB1 or the system message carrying the TA pre-compensation reference information fails, initiate an RLF process or a non-RLF process to obtain the system message carrying the TA pre-compensation reference information; wherein, the TA pre-compensation reference information includes ephemeris information and public timing At least one of common TA in advance.
  • the preset system message includes SIB1 and a system message for carrying TA pre-compensation reference information.
  • SIB1 does not carry ephemeris information and common TA.
  • the MIB, SIB2 and SIB-22-NB of the NB-IOT terminal do not carry ephemeris information and common TA, the validity of SIB2 and SIB-22-NB does not need to be guaranteed.
  • the embodiment of the present disclosure provides an uplink synchronization method, which is executed by the user equipment 101 .
  • This method includes:
  • Step S600 judging whether the system message carrying the TA pre-compensation reference information can be obtained.
  • Step S601-1 the user equipment 101 determines that the TA pre-compensation reference information is invalid in response to the timeout of the uplink synchronization valid timer related to the timing advance TA pre-compensation reference information, and initiates an RLF process or a non-RLF process to obtain the bearer TA pre-compensation reference information A system message; wherein, the TA pre-compensation reference information includes at least one of ephemeris information and common timing advance common TA.
  • the user equipment 101 can detect whether it can obtain the system message carrying the ephemeris information and common TA.
  • the embodiment of the present disclosure provides an uplink synchronization method, which is executed by the user equipment 101 .
  • This method includes the following steps:
  • Step S600-1 judging whether a preset system message can be acquired based on the implementation process of the user equipment.
  • step S601-1 the user equipment 101 determines that the TA pre-compensation reference information is invalid in response to the timeout of the uplink synchronization valid timer related to the timing advance TA pre-compensation reference information.
  • the TA pre-compensation reference information fails, initiate the RLF process or non-RLF process to obtain the system message carrying the TA pre-compensation reference information; wherein, the TA pre-compensation reference information includes at least one of the ephemeris information and the common timing advance common TA .
  • the embodiment of the present disclosure provides an uplink synchronization method, which is executed by the user equipment 101 .
  • This method includes the following steps:
  • Step S600-2 Within the set time period after the uplink synchronization effective timer expires, the system message for carrying the TA pre-compensation reference information is not obtained, and it is determined that the system message for carrying the TA pre-compensation reference information cannot be obtained.
  • step S601-1 the user equipment 101 determines that the TA pre-compensation reference information is invalid in response to the timeout of the uplink synchronization valid timer related to the timing advance TA pre-compensation reference information.
  • the TA pre-compensation reference information fails, initiate the RLF process or non-RLF process to obtain the system message carrying the TA pre-compensation reference information; wherein, the TA pre-compensation reference information includes at least one of the ephemeris information and the common timing advance common TA .
  • a timer is started, and the timer is used to monitor whether the uplink synchronization valid timer expires for a set duration.
  • the user equipment 101 when the timer monitors that the uplink synchronization effective timer expires and does not reach the set duration, the user equipment 101 obtains the system message carrying the TA pre-compensation reference information, and then stops or resets the timer .
  • the embodiment of the present disclosure provides an uplink synchronization method, which is executed by the user equipment 101 .
  • This method includes the following steps:
  • Step S600-2 Within the set time period after the uplink synchronization effective timer expires, no system message for carrying the TA pre-compensation reference information is obtained, and it is determined that the preset system message cannot be obtained.
  • Step S600-3 Initiate connection reestablishment when the preset system message cannot be obtained, or return to the idle state after executing the process of leaving the connected state.
  • Step S601-1 the user equipment 101 determines that the TA pre-compensation reference information is invalid in response to the timeout of the uplink synchronization valid timer related to the timing advance TA pre-compensation reference information, and initiates an RLF process or a non-RLF process to obtain the bearer TA pre-compensation reference information A system message; wherein, the TA pre-compensation reference information includes at least one of ephemeris information and common timing advance common TA.
  • the release cause (release cause) is set to fail to obtain the system message.
  • the embodiment of the present disclosure provides an uplink synchronization method, which is executed by the user equipment 101 .
  • This method includes the following steps:
  • Step S1001 the RRC layer notifies the MAC layer after the uplink synchronization valid timer expires, so that the user equipment stops performing uplink transmission.
  • Step S601 the user equipment 101 responds to the timeout of the uplink synchronization valid timer related to the timing advance TA pre-compensation reference information, determines that the TA pre-compensation reference information is invalid, and initiates an RLF process or a non-RLF process to obtain the system carrying the TA pre-compensation reference information message; wherein, the TA pre-compensation reference information includes at least one of ephemeris information and common timing advance common TA.
  • uplink out-of-synchronization will be triggered.
  • the uplink data transmission behavior includes one of the following: random access, uplink scheduling request (SR), uplink transmission of configured grant, and uplink hybrid automatic retransmission feedback (HARQ feedback).
  • SR uplink scheduling request
  • HARQ feedback uplink hybrid automatic retransmission feedback
  • the user equipment 101 will not initiate random access before obtaining the latest ephemeris information and common TA.
  • the multimedia access layer (MAC layer) learns that the uplink synchronization effective timer expires, it may execute the processing flow after the uplink synchronization effective timer expires.
  • the timeout of the valid uplink synchronization timer includes the timeout of all valid uplink synchronization timers.
  • the uplink synchronization effective timers corresponding to the primary timing advance group (Primary Timing Advance Group, pTAG) all time out.
  • the uplink synchronization effective timer corresponding to the pTAG and the secondary timing advance group both time out.
  • the embodiment of the present disclosure provides an uplink synchronization method, which is executed by the user equipment 101 .
  • This method includes the following steps:
  • Step S1002 the RRC layer notifies the PHY layer after the uplink synchronization valid timer expires, so that the PHY layer does not perform any uplink transmission.
  • Step S601 the user equipment 101 responds to the timeout of the uplink synchronization valid timer related to the timing advance TA pre-compensation reference information, determines that the TA pre-compensation reference information is invalid, and initiates an RLF process or a non-RLF process to obtain the system carrying the TA pre-compensation reference information message; wherein, the TA pre-compensation reference information includes at least one of ephemeris information and common timing advance common TA.
  • the physical layer temporarily prohibits any uplink transmission after learning that the uplink synchronization valid timer expires.
  • the user equipment 101 may re-initiate random access, and the PHY layer may allow this re-initiated random access.
  • the embodiment of the present disclosure provides an uplink synchronization method, which is executed by the user equipment 101 .
  • This method includes the following steps:
  • Step S1003 the RRC layer sends notification information indicating that the uplink synchronization valid timer expires to the MAC layer after the uplink synchronization valid timer expires, so that the MAC layer does not perform any uplink transmission except random access, wherein , the random access is random access in response to acquiring the latest TA pre-compensation reference information.
  • Step S601 the user equipment 101 responds to the timeout of the uplink synchronization valid timer related to the timing advance TA pre-compensation reference information, determines that the TA pre-compensation reference information is invalid, and initiates an RLF process or a non-RLF process to obtain the system carrying the TA pre-compensation reference information message; wherein, the TA pre-compensation reference information includes at least one of ephemeris information and common timing advance common TA.
  • the user equipment 101 may re-initiate random access.
  • the embodiment of the present disclosure provides an uplink synchronization method, which is executed by the user equipment 101 .
  • This method includes the following steps:
  • Step S1101 after the uplink synchronization valid timer expires, perform at least one of the following operations at the RRC layer:
  • Step S601 the user equipment 101 responds to the timeout of the uplink synchronization valid timer related to the timing advance TA pre-compensation reference information, determines that the TA pre-compensation reference information is invalid, and initiates an RLF process or a non-RLF process to obtain the system carrying the TA pre-compensation reference information message; wherein, the TA pre-compensation reference information includes at least one of ephemeris information and common timing advance common TA.
  • the operations that the RRC layer can perform after the uplink synchronization valid timer expires are disclosed.
  • the embodiment of the present disclosure provides an uplink synchronization method, which is executed by the user equipment 101 .
  • This method includes the following steps:
  • Step S1101 after the uplink synchronization valid timer expires, perform at least one of the following operations at the RRC layer:
  • Step S601 the user equipment 101 responds to the timeout of the uplink synchronization valid timer related to the timing advance TA pre-compensation reference information, determines that the TA pre-compensation reference information is invalid, and initiates an RLF process or a non-RLF process to obtain the system carrying the TA pre-compensation reference information message; wherein, the TA pre-compensation reference information includes at least one of ephemeris information and common timing advance common TA.
  • Step S1102 after obtaining the latest TA pre-compensation reference information, in response to receiving the MAC layer instruction to obtain the common timing advance common TA issued by the base station, perform at least one of the following operations at the RRC layer:
  • the operations that the RRC layer can perform after the uplink synchronization valid timer expires and after the new TA pre-compensation reference information is acquired are disclosed.
  • the embodiment of the present disclosure provides an uplink synchronization method, which is executed by the user equipment 101 .
  • This method includes the following steps:
  • Step S1201 after the uplink synchronization valid timer expires, after the MAC layer receives the notification information sent by the RRC layer for indicating that the uplink synchronization valid timer expires, perform at least one of the following operations:
  • Step S601 the user equipment 101 responds to the timeout of the uplink synchronization valid timer related to the timing advance TA pre-compensation reference information, determines that the TA pre-compensation reference information is invalid, and initiates an RLF process or a non-RLF process to obtain the system carrying the TA pre-compensation reference information message; wherein, the TA pre-compensation reference information includes at least one of ephemeris information and common timing advance common TA.
  • the MAC layer may also perform one of the following operations:
  • the operations that the MAC layer can perform when the uplink synchronization valid timer expires and the latest TA pre-compensation reference information is obtained are disclosed.
  • the random access initiated by the MAC layer may be to directly start the random access, or to perform the random access when the user equipment 101 is sending uplink data.
  • the embodiment of the present disclosure provides an uplink synchronization method, which is executed by the user equipment 101 .
  • This method includes the following steps:
  • Step S601 the user equipment 101 responds to the timeout of the uplink synchronization valid timer related to the timing advance TA pre-compensation reference information, determines that the TA pre-compensation reference information is invalid, and initiates an RLF process or a non-RLF process to obtain the system carrying the TA pre-compensation reference information message; wherein, the TA pre-compensation reference information includes at least one of ephemeris information and common timing advance common TA.
  • timeout related information of the uplink synchronization effective timer to the network device; wherein the timeout related information includes at least one of the following:
  • system frame number system frame number, SFN
  • hyper frame number hyper frame number, HFN
  • subframe number when the uplink synchronization valid timer expires
  • the time corresponding to when the uplink synchronization effective timer expires includes: an initial effective time (epoch time) or Coordinated Universal Time (UTC).
  • the unit of the remaining duration of the uplink synchronization valid timer before timeout includes: SFN or HFN, epoch time or UTC time.
  • the user equipment 101 can report the timeout related information of the uplink synchronization valid timer to the first network device 102 at an appropriate time, so that the first network device 102 can know when the uplink synchronization valid timer expires, so as to target To prepare in advance, for example, the first network device 102 may not schedule the UE within a certain period of time after the timeout.
  • the embodiment of the present disclosure provides an uplink synchronization method, which is executed by the user equipment 101 .
  • This method includes the following steps:
  • Step S601 the user equipment 101 responds to the timeout of the uplink synchronization valid timer related to the timing advance TA pre-compensation reference information, determines that the TA pre-compensation reference information is invalid, and initiates an RLF process or a non-RLF process to obtain the system carrying the TA pre-compensation reference information message; wherein, the TA pre-compensation reference information includes at least one of ephemeris information and common timing advance common TA.
  • the user equipment 101 returns to the idle state after performing a process of leaving the connected state.
  • the embodiment of the present disclosure provides an uplink synchronization method, which is executed by the user equipment 101 .
  • This method includes the following steps:
  • Step S601 the user equipment 101 responds to the timeout of the uplink synchronization valid timer related to the timing advance TA pre-compensation reference information, determines that the TA pre-compensation reference information is invalid, and initiates an RLF process or a non-RLF process to obtain the system carrying the TA pre-compensation reference information message; wherein, the TA pre-compensation reference information includes at least one of ephemeris information and common timing advance common TA.
  • Step S1501 after initiating the RLF process, perform at least one of the following processes:
  • Random access is triggered after acquiring the SIB.
  • the user equipment 101 may declare a radio link failure (declare RLF), and may perform the RLF enhancement operation in step S1501.
  • the embodiment of the present disclosure provides an uplink synchronization method, which is executed by the first network device 102 .
  • This method includes the following steps:
  • Step S1601 in response to the user equipment 101 initiating an RLF process or a non-RLF process, the first network device 102 sends a system message carrying TA pre-compensation reference information to the user equipment 101; wherein, the TA pre-compensation reference information includes ephemeris information and public timing At least one of the advance amount common TA, the user equipment is used to initiate the RLF process or the non-RLF process after the uplink synchronization valid timer related to the timing advance amount TA pre-compensation reference information expires and the TA pre-compensation reference information is determined to be invalid.
  • the first network device 102 can send a system message carrying TA pre-compensation reference information for the user equipment at an appropriate time, so that the user equipment can perform TA pre-compensation according to the newly acquired TA pre-compensation reference information, so as to Ensure uplink synchronization.
  • the embodiment of the present disclosure provides an uplink synchronization method, which is executed by the first network device 102 .
  • This method includes the following steps:
  • Step S1601 in response to the user equipment 101 initiating an RLF process or a non-RLF process, the first network device 102 sends a system message carrying TA pre-compensation reference information to the user equipment 101; wherein, the TA pre-compensation reference information includes ephemeris information and public timing At least one of the advance amount common TA, the user equipment is used to initiate the RLF process or the non-RLF process after the uplink synchronization valid timer related to the timing advance amount TA pre-compensation reference information expires and the TA pre-compensation reference information is determined to be invalid.
  • Step S1602 the first network device 102 receives the timeout related information of the uplink synchronization effective timer sent by the user equipment 101; wherein, the timeout related information includes at least one of the following:
  • the embodiment of the present disclosure also provides a communication device, which can have the function of the user equipment 101 in the above method embodiment, and is used to execute the user equipment 101 provided by the above embodiment. steps to execute.
  • This function can be implemented by hardware, and can also be implemented by software or hardware executes corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the communication apparatus 700 shown in FIG. 7 may serve as the user equipment 101 involved in the above method embodiment, and execute the steps performed by the user equipment 101 in the above method embodiment.
  • the communication device 700 may include a transceiver module 701 .
  • the transceiver module 701 can be used to support the communication device 700 to communicate, and the transceiver module 701 can have a wireless communication function, for example, it can perform wireless communication with other communication devices through a wireless air interface.
  • the transceiver module 701 When executing the steps implemented by the user equipment 101, the transceiver module 701 is used to determine that the TA pre-compensation reference information is invalid in response to the timeout of the uplink synchronization valid timer related to the timing advance TA pre-compensation reference information, and initiate the RLF process or non-RLF The process obtains a system message carrying the TA pre-compensation reference information; wherein, the TA pre-compensation reference information includes at least one of ephemeris information and common timing advance common TA.
  • the apparatus 800 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, and the like.
  • device 800 may include one or more of the following components: processing component 802, memory 804, power supply component 806, multimedia component 808, audio component 810, input/output (I/O) interface 812, sensor component 814, and a communication component 816 .
  • the processing component 802 generally controls the overall operations of the device 800, such as those associated with display, telephone calls, data communications, camera operations, and recording operations.
  • the processing component 802 may include one or more processors 820 to execute instructions to complete all or part of the steps of the above method. Additionally, processing component 802 may include one or more modules that facilitate interaction between processing component 802 and other components. For example, processing component 802 may include a multimedia module to facilitate interaction between multimedia component 808 and processing component 802 .
  • the memory 804 is configured to store various types of data to support operations at the device 800 . Examples of such data include instructions for any application or method operating on device 800, contact data, phonebook data, messages, pictures, videos, and the like.
  • the memory 804 can be implemented by any type of volatile or non-volatile storage device or their combination, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable Programmable Read Only Memory (EPROM), Programmable Read Only Memory (PROM), Read Only Memory (ROM), Magnetic Memory, Flash Memory, Magnetic or Optical Disk.
  • SRAM static random access memory
  • EEPROM electrically erasable programmable read-only memory
  • EPROM erasable Programmable Read Only Memory
  • PROM Programmable Read Only Memory
  • ROM Read Only Memory
  • Magnetic Memory Flash Memory
  • Magnetic or Optical Disk Magnetic Disk
  • the power supply component 806 provides power to the various components of the device 800 .
  • Power components 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for device 800 .
  • the multimedia component 808 includes a screen that provides an output interface between the device 800 and the user.
  • the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from a user.
  • the touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or swipe action, but also detect the duration and pressure associated with the touch or swipe action.
  • the multimedia component 808 includes a front camera and/or a rear camera. When the device 800 is in an operation mode, such as a shooting mode or a video mode, the front camera and/or the rear camera can receive external multimedia data. Each front camera and rear camera can be a fixed optical lens system or have focal length and optical zoom capability.
  • the audio component 810 is configured to output and/or input audio signals.
  • the audio component 810 includes a microphone (MIC) configured to receive external audio signals when the device 800 is in operation modes, such as call mode, recording mode and voice recognition mode. Received audio signals may be further stored in memory 804 or sent via communication component 816 .
  • the audio component 810 also includes a speaker for outputting audio signals.
  • the I/O interface 812 provides an interface between the processing component 802 and a peripheral interface module, which may be a keyboard, a click wheel, a button, and the like. These buttons may include, but are not limited to: a home button, volume buttons, start button, and lock button.
  • Sensor assembly 814 includes one or more sensors for providing status assessments of various aspects of device 800 .
  • the sensor component 814 can detect the open/closed state of the device 800, the relative positioning of components, such as the display and keypad of the device 800, and the sensor component 814 can also detect a change in the position of the device 800 or a component of the device 800 , the presence or absence of user contact with the device 800 , the device 800 orientation or acceleration/deceleration and the temperature change of the device 800 .
  • Sensor assembly 814 may include a proximity sensor configured to detect the presence of nearby objects in the absence of any physical contact.
  • Sensor assembly 814 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications.
  • the sensor component 814 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor or a temperature sensor.
  • the communication component 816 is configured to facilitate wired or wireless communication between the apparatus 800 and other devices.
  • the device 800 can access wireless networks based on communication standards, such as WiFi, 4G or 5G, or a combination thereof.
  • the communication component 816 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel.
  • the communication component 816 also includes a near field communication (NFC) module to facilitate short-range communication.
  • NFC near field communication
  • the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, Infrared Data Association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology and other technologies.
  • RFID Radio Frequency Identification
  • IrDA Infrared Data Association
  • UWB Ultra Wideband
  • Bluetooth Bluetooth
  • apparatus 800 may be programmed by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable A gate array (FPGA), controller, microcontroller, microprocessor or other electronic component implementation for performing the methods described above.
  • ASICs application specific integrated circuits
  • DSPs digital signal processors
  • DSPDs digital signal processing devices
  • PLDs programmable logic devices
  • FPGA field programmable A gate array
  • controller microcontroller, microprocessor or other electronic component implementation for performing the methods described above.
  • the embodiment of the present disclosure also provides a communication device, which can have the function of the first network device 102 in the above method embodiment, and is used to implement the method provided by the above embodiment. Steps performed by a network device 102 .
  • This function can be implemented by hardware, and can also be implemented by software or hardware executes corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the communication apparatus 900 shown in FIG. 9 may serve as the first network device 102 involved in the above method embodiment, and execute the steps performed by the first network device 102 in the above method embodiment.
  • the communication device 900 may include a transceiver module 901 .
  • the transceiver module 901 can be used to support the communication device 900 to communicate, and the transceiver module 901 can have a wireless communication function, for example, it can perform wireless communication with other communication devices through a wireless air interface.
  • the transceiver module 901 When executing the steps implemented by the first network device 102, the transceiver module 901 is configured to send a system message carrying TA pre-compensation reference information to the user equipment in response to the user equipment initiating an RLF process or a non-RLF process; wherein, the TA pre-compensation reference The information includes at least one of the ephemeris information and the common timing advance common TA, and the user equipment is used to determine that the TA pre-compensation reference information is invalid after the uplink synchronization valid timer related to the timing advance TA pre-compensation reference information expires, Initiate an RLF process or a non-RLF process.
  • the device 1000 When the communication device is the first network device 102, its structure may also be as shown in FIG. 10 .
  • the device 1000 includes a memory 1001 , a processor 1002 , a transceiver component 1003 , and a power supply component 1006 .
  • the memory 1001 is coupled with the processor 1002, and can be used to store programs and data necessary for the communication device 1000 to realize various functions.
  • the processor 1002 is configured to support the communication device 1000 to execute corresponding functions in the above method, and this function can be realized by calling a program stored in the memory 1001 .
  • the transceiver component 1003 may be a wireless transceiver, and may be used to support the communication device 1000 to receive signaling and/or data and send signaling and/or data through a wireless air interface.
  • the transceiver component 1003 may also be called a transceiver unit or a communication unit, and the transceiver component 1003 may include a radio frequency component 1004 and one or more antennas 1005, wherein the radio frequency component 1004 may be a remote radio unit (remote radio unit, RRU), specifically It can be used for the transmission of radio frequency signals and the conversion of radio frequency signals and baseband signals, and the one or more antennas 1005 can be specifically used for radiating and receiving radio frequency signals.
  • RRU remote radio unit
  • the processor 1002 can perform baseband processing on the data to be sent, and then output the baseband signal to the radio frequency unit, and the radio frequency unit performs radio frequency processing on the baseband signal and sends the radio frequency signal through the antenna in the form of electromagnetic waves.
  • the radio frequency unit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 1002, and the processor 1002 converts the baseband signal into data and converts the data to process.
  • the user equipment can actively obtain the system message carrying the TA pre-compensation reference information from the first network device, so as to re-learn the currently valid TA pre-compensation reference information, so as to be able to perform TA pre-compensation, Ensure uplink synchronization.
  • the user equipment can actively obtain system information by initiating an RLF process, or obtain system information by initiating a non-RLF process, so that all user equipment in the connected state can obtain TA pre-compensation reference information by obtaining system information.

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Abstract

本公开提供了一种上行同步方法、装置及可读存储介质，其中方法包括：响应于与定时提前量TA预补偿参考信息相关的上行同步有效定时器超时，确定TA预补偿参考信息失效，发起RLF流程或非RLF流程获取承载所述TA预补偿参考信息的系统消息；其中，所述TA预补偿参考信息包括星历信息和公共定时提前量common TA中的至少一种。本公开实施例中，用户设备能够在TA预补偿参考信息失效时，主动向第一网络设备获取承载TA预补偿参考信息的系统消息，从而能够重新获知当前有效的TA预补偿参考信息，以便于能够进行TA预补偿，保证上行同步。并且，使处于连接态的用户设备均可以通过获取系统消息的方式获得TA预补偿参考信息。

Description

一种上行同步方法、装置及可读存储介质 技术领域
本公开涉及无线通信技术领域，尤其涉及一种上行同步方法、装置及可读存储介质。
背景技术
第五代(5th generation，5G)通信技术中，引入了非陆地/地面网络(non-terrestrial networks，NTN)通信。NTN通信中，用户设备(User Equipment，UE)通过卫星或无人机获得无线资源。
5G网络需要保证上下行的同步。对于网络设备而言，接收到用户设备上行信号的上行时间(timing)相较于发送下行信号的下行时间存在延迟。并且不同UE对应的延迟不同，使得不同UE的上行时间在网络设备侧不对齐，这会导致UE间发送数据产生干扰。
为消除UE之间的不同延迟，网络设备通过发送定时提前(Timing Advance，TA)调整命令，使UE的上行时间提前一定时间，来保证所有UE到达基站侧的上行时间都对齐。在随机接入过程中，UE通过随机接入信道(Random Access Channel，RACH)发送前导序列(preamble)，网络设备根据前导序列，通过返回给UE的随机接入消息指示TA值，实现调整UE的上行时间。
对于陆地/地面网络TN而言，基站可以根据前导序列确定TA值。而对于NTN而言，不同UE间的延迟差值更大，网络设备无法直接根据前导序列确定UE上行时间的TA调整信息，需要采用TA预补偿方式。目前，与TA预补偿相关的信息具有相应的有效时间，失效后UE将无法进行TA预补偿。
发明内容
有鉴于此，本公开提供了一种上行同步方法、装置及可读存储介质。
根据本公开实施例的第一方面，提供一种上行同步方法，此方法被用户设备执行，包括：
响应于与定时提前量TA预补偿参考信息相关的上行同步有效定时器超时，确定TA预补偿参考信息失效，发起RLF流程或非RLF流程获取承载所述TA预补偿参考信息的系统消息；其中，所述TA预补偿参考信息包括星历信息和公共定时提前量common TA中的至少一种。
采用此方法，用户设备能够在TA预补偿参考信息失效时，主动获取承载TA预补偿参考信息的系统消息，从而能够重新获知当前有效的TA预补偿参考信息，以便于能够进行TA预补偿，保证上行同步。并且，用户设备既可以通过发起无线链路失败RLF流程主动获取系统消息，也可以通过发起非RLF流程获取系统消息，从而使处于连接态的用户设备均可以通过获取系统消息的方式获得TA预补偿参考信息。
在一种可能的实施方式中，所述发起RLF流程或非RLF流程获取承载所述TA预补偿参考信息的系统消息包括：
在预设的系统消息无效时，发起RLF流程或非RLF流程获取承载所述TA预补偿参考信息的系统消息；其中，所述预设的系统消息包括承载所述TA预补偿参考信息的系统消息。
在一种可能的实施方式中，所述方法还包括：
判断是否能够获取所述承载所述TA预补偿参考信息的系统消息。
在一种可能的实施方式中，所述判断是否能够获取所述承载所述TA预补偿参考信息的系统消息，包括：
基于用户设备的实现过程判断是否能够获取所述预设的系统消息。
在一种可能的实施方式中，所述判断是否能够获取所述承载所述TA预补偿参考信息的系统消息，包括：
在所述上行同步有效定时器超时后的设定时长内，未获取到用于承载所述TA预补偿参考信息的系统消息，确定不能获取所述承载所述TA预补偿参考信息的系统消息。
在一种可能的实施方式中，所述方法还包括：
在不能获取所述预设的系统消息时，发起连接重建，或者，执行离开连接态的流程后返回空闲态。
在一种可能的实施方式中，所述方法还包括：
RRC层在所述上行同步有效定时器超时后通知MAC层，以使所述用户设备停止执行上行发送。
在一种可能的实施方式中，所述方法还包括：
RRC层在所述上行同步有效定时器超时后通知PHY层，以使PHY层不执行任何上行传输。
在一种可能的实施方式中，所述方法还包括：
RRC层在所述上行同步有效定时器超时后向MAC层发送用于指示所述上行同步有效定时器超时的通知信息，以使MAC层不执行除随机接入之外的任何上行传输，其中，所述随机接入是响应于获取最新的TA预补偿参考信息后的随机接入。
在一种可能的实施方式中，所述方法还包括：
在所述上行同步有效定时器超时后，在RRC层执行以下操作中的至少一个：
释放或禁用所有服务小区的PUCCH或SPUCCH；
释放或禁用所有服务小区的SPS；
释放或禁用NB-IOT的专用SR资源。
在一种可能的实施方式中，所述方法还包括：
在获取到最新的TA预补偿参考信息后，响应于收到MAC层指示获取到基站下发的公共定时提前量common TA，在RRC层执行以下操作中的至少一个：
恢复所有禁用的服务小区的PUCCH或SPUCCH；
恢复所有禁用的服务小区的SPS；
恢复所有禁用的NB-IOT的专用SR资源。
在一种可能的实施方式中，所述方法还包括：
在所述上行同步有效定时器超时后，响应于MAC层接收到RRC层发送的用于指示上行同步有效定时器超时的通知信息后，执行以下操作中的至少一个：
清空所有服务小区的HARQ缓存；
清空或禁用所有的已配置的下行配置和上行授权；
发起随机接入；
禁止任何上行传输；
禁止除随机接入之外的任何上行传输；
在获取到公共定时提前量common TA后通知RRC层；
在获取到公共定时提前量common TA后恢复禁用的已配置的下行配置和上行授权。
在一种可能的实施方式中，所述方法还包括：
向网络设备发送所述上行同步有效定时器的超时相关信息；其中，所述超时相关信息包括以下中的至少一种：
所述上行同步有效定时器超时时对应的系统帧号、超帧号或子帧号；
所述上行同步有效定时器超时时对应的时间；
所述上行同步有效定时器距超时的剩余时长。
在一种可能的实施方式中，所述方法还包括：
所述用户设备执行离开连接态的流程后返回空闲态。
在一种可能的实施方式中，所述方法还包括：
发起RLF流程之后，执行以下处理中的至少一种：
不发起连接重建
不记录RLF相关报告；
在接入层AS没有激活的情况下保持连接态；
触发获取SIB；
在获取SIB后触发随机接入。
根据本公开实施例的第二方面，提供一种上行同步方法，此方法被第一网络设备执行，包括：响应于用户设备发起RLF流程或非RLF流程，向用户设备发送承载TA预补偿参考信息的系统消息；其中，所述TA预补偿参考信息包括星历信息和公共定时提前量common TA中的至少一种，所述用户设备用于在与定时提前量TA预补偿参考信息相关的上行同步有效定时器超时，确定TA预补偿参考信息失效后，发起RLF流程或非RLF流程。
采用此方法，第一网络设备可以在合适的时机，为用户设备发送承载TA预补偿参考信息的系统消息，以便于用户设备能够根据重新获取的TA预补偿参考信息，进行TA预补偿，以保证上行同步。
在一种可能的实施方式中，所述方法还包括：
接收所述用户设备发送的所述上行同步有效定时器的超时相关信息；其中，所述超时相关信息包括以下中的至少一种：
所述上行同步有效定时器超时时对应的系统帧号、超帧号或子帧号；
所述上行同步有效定时器超时时对应的时间；
所述上行同步有效定时器距超时的剩余时长。
根据本公开实施例的第三方面，提供一种通信装置。该通信装置可用于执行上述第一方面或第一方面的任一可能的设计中由用户设备执行的步骤。该用户设备可通过硬件结构、软件模块、或硬件结构加软件模块的形式来实现上述各方法中的各功能。
在通过软件模块实现第三方面所示通信装置时，该通信装置可包括收发模块，其中，收发模块可用于支持通信装置进行通信。
在执行上述第一方面所述步骤时，收发模块，用于响应于与定时提前量TA预补偿参考信息相关的上行同步有效定时器超时，确定TA预补偿参考信息失效，发起RLF流程或非RLF流程获取承载所述TA预补偿参考信息的系统消息；其中，所述TA预补偿参考信息包括星历信息和公共定时提前量common TA中的至少一种。
根据本公开实施例的第四方面，提供一种通信装置。该通信装置可用于执行上述第二方面或第二方面的任一可能的设计中由网络设备执行的步骤。该网络设备可通过硬件结构、软件模块、或硬件结构加软件模块的形式来实现上述各方法中的各功能。
在通过软件模块实现第四方面所示通信装置时，该通信装置可包括收发模块，其中，收发模块可用于支持通信装置进行通信。
在执行上述第二方面所述步骤时，收发模块，用于响应于用户设备发起RLF流程或非RLF流程，向用户设备发送承载TA预补偿参考信息的系统消息；其中，所述TA预补偿参考信息包括星历信息和公共定时提前量common TA中的至少一种，所述用户设备用于在与定时提前量TA预补偿参考信息相关的上行同步有效定时器超时，确定TA预补偿参考信息失效后，发起RLF流程或非RLF流程。
根据本公开实施例的第五方面，提供一种通信装置，包括处理器以及存储器；所述存储器用于存储计算机程序；所述处理器用于执行所述计算机程序，以实现第一方面或第一方面的任意一种可能的设计。
根据本公开实施例的第六方面，提供一种通信装置，包括处理器以及存储器；所述存储器用于存储计算机程序；所述处理器用于执行所述计算机程序，以实现第二方面或第二方面的任意一种可能的设计。
根据本公开实施例的第七方面，提供一种计算机可读存储介质，所述计算机可读存储介质中存储有指令(或称计算机程序、程序)，当其在计算机上被调用执行时，使得计算机执行上述第一方面或第一方面的任意一种可能的设计。
根据本公开实施例的第八方面，提供一种计算机可读存储介质，所述计算机可读存储介质中存储有指令(或称计算机程序、程序)，当其在计算机上被调用执行时，使得计算机执行上述第二方面或第二方面的任意一种可能的设计。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性和解释性的，并不能限制本公开。
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此处所说明的附图用来提供对本公开实施例的进一步理解，构成本申请的一部分，本公开实施例的示意性实施例及其说明用于解释本公开实施例，并不构成对本公开实施例的不当限定。在附图中：
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图1是本公开实施例提供的一种非地面网络系统架构示意图；
图2是本公开实施例提供的非地面网络中卫星的相关信息图；
图3是本公开实施例提供的非地面网络中透传模式的示意图；
图4是本公开实施例提供的非地面网络中再生模式的示意图；
图5是根据一示例性实施例示出的一种上行同步方法的流程图；
图6是根据另一示例性实施例示出的一种上行同步方法的流程图；
图7是根据一示例性实施例示出的一种上行同步装置的示意图；
图8是根据一示例性实施例示出的另一种上行同步装置的示意图；
图9是根据一示例性实施例示出的另一种上行同步装置的示意图；
图10是根据一示例性实施例示出的另一种上行同步装置的示意图。
具体实施方式
现结合附图和具体实施方式对本公开实施例进一步说明。
这里将详细地对示例性实施例进行说明，其示例表示在附图中。下面的描述涉及附图时，除非另有表示，不同附图中的相同数字表示相同或相似的要素。以下示例性实施例中所描述的实施方式并不代表与本公开实施例相一致的所有实施方式。相反，它们仅是与如所附权利要求书中所详述的、本公开的一些方面相一致的装置和方法的例子。
本公开实施例提供的一种上行同步方法，应用于非地面网络NTN系统100。图1示出了本申请实施例适用的一种可能的非陆地/地面网络系统的架构。该系统100可由用户设备101、第一网络设备102以及第二网络设备103组成。其中，第一网络设备102和第二网络设备103之间的通信链路为反馈链路(feeder link)；第二网络设备103和用户设备101之间的通信链路为服务链路(service link)。
用户设备101可以是能够接收网络设备调度和指示信息的无线终端设备,如用于向用户提供语音和/或数据连通性的设备，或具有无线连接功能的手持式设备、或连接到无线调制解调器的其他处理设备。用户设备101可以经无线接入网(如，radio access network，RAN)与一个或多个核心网或者互联网进行通信，无线终端设备可以是移动终端设备，如移动电话(或称为“蜂窝”电话，手机(mobile phone))、计算机和用户设备101通信芯片，例如，可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置，它们可与无线接入网交换语言和/或数据。终端具体可以是个人通信业务(personal communication service，PCS)电话、无绳电话、会话发起协议(SIP)话机、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、平板电脑(Pad)、带无线收发功能的电脑等设备。终端也可以包括订户单元(subscriber unit)、订户站(subscriber station)，移动站(mobile station)、移动台(mobile station，MS)、远程站(remote station)、接入点(access point，AP)、远程终端设备(remote terminal)、接入终端设备(access terminal)、用户终端设备(user terminal)、用户代理(user agent)、用户站(subscriber station，SS)、用户端设备(customer premises equipment，CPE)、终端(terminal)、移动终端(mobile terminal，MT)等。无线终端设备也可以是可穿戴设备以及下一代通信系统，例如，5G网络中的终端设备或者未来演进的公共陆地移动网络(public land mobile network，PLMN)网络中的终端设备、NR通信系统中的终端设备等。
第一网络设备102可以是关口站或称地面站、地球站、信关站(gateway)，可用于连接第二网络设备103与核心网。
第二网络设备103可以是卫星(或称卫星基站)，静止轨道(geostationary earth orbit,GEO)卫星，非静止轨道(none-geostationary earth orbit，NGEO)的中轨道(medium earth orbit，MEO)卫星和低轨道(low earth orbit，LEO)卫星，高空通信平台(high altitude platform station，HAPS)等，这里不做限制。如图2所示，为典型的NTN中卫星103的高度、轨道及覆盖范围。
第二网络设备103如卫星处理信号的方式包括透传模式和再生模式。图3为透传模式的示意图，图4为再生模式的示意图。
在如图3所示的透传模式中，NTN地面站102将gNB的信号发送给卫星103，卫星103首 先将收到的信号转换到卫星频段，再将卫星频段的信号下发给UE。透传模式中卫星103类似于中继器(repeater)，除了进行频率转换与信号放大外，并不对gNB的信号解调。
在如图4所示的再生模式中，NTN地面站102将gNB的信号发送给卫星103，卫星103首先对信号进行解调译码后再重新编码调制(即再生过程)，然后卫星103通过卫星频段向UE101发送再生的信号。
在5G通信中，下行同步是通过UE101接收网络设备103发送的下行同步信号来获取下行同步。在获取到下行同步后，UE需要进行上行同步以保证所有UE的上行信号到达网络设备的时间与网络设备的上行时间对齐。
上行同步是通过UE发起随机接入来获得。UE101发送前导码给网络设备，网络设备通过接收前导码来获取UE和网络设备间的传输时延，然后网络设备向UE下发定时提前(Timing Advance，TA)命令。其中，TA值等于两倍的传输时延，UE按TA指示的值将上行提前来获取上行同步。
由于网络设备发送的下行信号到达UE101会经历单向传播时延，因此UE接收下行信号的下行时间(timing)相比基站发送下行信号时间会延迟一个单向传播时延的时间。当UE将自身的上行时间与下行时间对齐后进行上行发送时，上行信号还需经历一个单向传播时延的时间才到达网络设备。由此，对于网络设备而言，接收到UE上行信号的上行时间相较于发送下行信号的下行时间延迟了一个往返时延(Round-Trip Time，RTT)。
不同UE对应的RTT不同，使得不同UE的上行时间在网络设备侧不对齐，导致UE间发送数据产生干扰。网络设备可以通过发送TA调整命令，使UE的上行时间提前一个对应的RTT时间，来保证所有UE到达基站侧的上行时间都对齐。
在随机接入过程中，当UE101在一个RACH时机(记为RO)发送前导序列(preamble)后，网络设备接收到该前导序列时需要知道接收的前导序列所对应的发送RO，以便在随机接入响应时正确寻址该随机接入请求，以及进行上行定时调整。
TN中前导序列设计允许的最大RTT是0.68ms(对应100km覆盖半径)，小于一个子帧。因此，网络设备接收前导序列的子帧与该前导序列发送所对应的RO子帧相同，上行定时偏差通过子帧边界偏差即可获得。确定了上行定时偏差，即可确定定时提前TA量。
而NTN中不同UE101到达第一网络设备102的RTT差值最高可达10.3ms，即不同UE间的延迟差值更大，第一网络设备102无法从接收到的前导序列推测出其发送的RO子帧以及上行定时偏差。除非RO之间的间隔大于最大往返时延差值，从而保证不同RO的前导序列接收窗口不重叠，但此种情况会对RO资源带来较大限制。
对NTN中涉及的前导序列接收模糊性问题，可以通过TA预补偿来调整，即UE101在发送前导序列前，将UE101的上行时间(UL timing)根据UE101和第一网络设备102之间的RTT来进行提前，从而保证不同UE采用相同RO发送的前导序列到达基站的时间差均限制在1个子帧以内。
在NTN中，UE101到第一网络设备102的RTT包含两部分：一部分是UE101与卫星103间服务链路的RTT，该部分为UE specific TA部分；另一部分是卫星103与第一网络设备102间反馈链路的RTT，该部分为公共定时提前量(common TA)部分。其中，common TA部分的一部分可以由第一网络设备102来补偿，common TA部分的另一部分可以由UE101来补偿。由UE101补偿的部分，由第一网络设备102通过系统消息发送给UE101。
第一网络设备102除了广播需要UE101补偿的common TA外，还会广播卫星的星历信息，来帮助UE101获取卫星103的位置以便计算UE101到卫星103的RTT。由于卫星的移动性，common TA和星历信息都会发生变化，因此系统消息(SIB)里广播的星历信息和 common TA会有一个上行同步有效定时器(UL synchronization validity timer)。
相关技术中，对于处于连接态的UE(例如IOT终端)，仅支持在执行RLF时才能获取SIB消息。而如果上行同步有效定时器超时，则表示之前从SIB接收的星历信息和common TA信息已失效，从而UE101将无法再获取卫星103的位置，无法计算UE101到卫星103的RTT，也就无法做TA预补偿，最终将导致上行失步(UL同步loss)。
UL同步loss后，UE需要重新获取SIB，但是由于UE不支持除执行RLF之外的连接态时获取SIB，因此提出通过UE发起RLF流程或新的流程来重新获取SIB。
本公开实施例提供了一种上行同步方法。参照图5，图5是根据一示例性实施例示出的上行同步方法的流程图，如图5所示，此方法包括：
步骤S501，用户设备101响应于与定时提前量TA预补偿参考信息相关的上行同步有效定时器超时，确定TA预补偿参考信息失效，发起RLF流程或非RLF流程获取承载TA预补偿参考信息的系统消息；其中，TA预补偿参考信息包括星历信息和公共定时提前量common TA中的至少一种。
步骤S502，第一网络设备102响应于用户设备101发起RLF流程或非RLF流程，向用户设备101发送承载TA预补偿参考信息的系统消息，其中，TA预补偿参考信息包括星历信息和公共定时提前量common TA中的至少一种。
在一些可能的实施方式中，系统消息包括主消息块(Master Information Block，MIB)和多个系统消息块(System Information Blocks，SIB)。
本公开实施例中，用户设备101能够在TA预补偿参考信息失效时，主动从第一网络设备102获取承载TA预补偿参考信息的系统消息，从而能够重新获知当前有效的TA预补偿参考信息，以便于能够进行TA预补偿，保证上行同步。并且，用户设备101既可以通过发起RLF流程主动获取系统消息，也可以通过发起非RLF流程获取系统消息，从而使处于连接态的用户设备均可以通过获取系统消息的方式获得TA预补偿参考信息。
本公开实施例提供了一种上行同步方法，此方法被用户设备101执行。参照图6，图6是根据一示例性实施例示出的上行同步方法的流程图，如图6所示，此方法包括：
步骤S601，用户设备101响应于与定时提前量TA预补偿参考信息相关的上行同步有效定时器超时，确定TA预补偿参考信息失效，发起RLF流程或非RLF流程获取承载TA预补偿参考信息的系统消息；其中，TA预补偿参考信息包括星历信息和公共定时提前量common TA中的至少一种。
在一些可能的实施方式中，用户设备101会根据系统消息中星历信息和common TA对应的起始生效时刻(epoch time)来启动上行同步有效定时器(UL synchronization validity time)。
在一些可能的实施方式中，TA预补偿参考信息包括星历信息和common TA。
在一示例中，星历信息和common TA承载在同一个系统消息中，星历信息和common TA共用一个上行同步有效定时器。
在一个示例中，星历信息和common TA承载在不同的系统消息中，星历信息对应有一上行同步有效定时器，common TA对应有另一上行同步有效定时器。
在一些可能的实施方式中，TA预补偿参考信息包括星历信息。用户设备101能够根据星历信息确定卫星103的位置以便计算用户设备101与卫星103的RTT。
在一些可能的实施方式中，TA预补偿参考信息包括common TA。
本公开实施例中，用户设备101能够在TA预补偿参考信息失效时，主动向第一网络设 备102获取承载TA预补偿参考信息的系统消息，从而能够重新获知当前有效的TA预补偿参考信息，以便于能够进行TA预补偿，保证上行同步。并且，用户设备101既可以通过发起RLF流程主动获取系统消息，也可以通过发起非RLF流程获取系统消息，从而使处于连接态的用户设备均可以通过获取系统消息的方式获得TA预补偿参考信息。
本公开实施例提供了一种上行同步方法，此方法被用户设备101执行。此方法包括：
步骤S601-1，用户设备101响应于与定时提前量TA预补偿参考信息相关的上行同步有效定时器超时，确定TA预补偿参考信息失效。在预设的系统消息失效时，发起RLF流程或非RLF流程获取承载TA预补偿参考信息的系统消息；其中，TA预补偿参考信息包括星历信息和公共定时提前量common TA中的至少一种；其中，所述预设的系统消息包括承载所述TA预补偿参考信息的系统消息。
在一些可能的实施方式中，预设的系统消息包括承载TA预补偿参考信息的系统消息。
在一些可能的实施方式中，预设的系统消息包括SIB1以及承载TA预补偿参考信息的系统消息。
在一些可能的实施方式中，预设的系统消息包括MIB、SIB1以及承载TA预补偿参考信息的系统消息。
在一些可能的实施方式中，当前存储的预设的系统消息若非有效，用户设备101可获取最新的预设的系统消息。
在一些可能的实施方式中，用户设备101仅需获取承载TA预补偿参考信息的系统消息，并仅需保证此系统消息的有效性。
在一示例中，承载TA预补偿参考信息的系统消息可以是以下中的一种：MIB、SIB1、SIB2以及窄带物联网(NB-IOT)终端的SIB-22-NB。
在一些可能的实施方式中，步骤S701还包括：无需保证未承载TA预补偿参考信息的系统消息有效。
在一示例中，MIB、SIB1、SIB2以及窄带物联网(NB-IOT)终端的SIB-22-NB中均不携带星历信息和公共定时提前量common TA时，无需保证MIB、SIB1、SIB2以及窄带物联网(NB-IOT)终端的SIB-22-NB有效。
本公开实施例中，设置预设的系统消息，在上行同步有效定时器超时的场景中，当预设的系统消息无效时，发起RLF流程或非RLF流程获取承载TA预补偿参考信息的系统消息。
本公开实施例提供了一种上行同步方法，此方法被用户设备101执行。此方法中，预设的系统消息为承载所述TA预补偿参考信息的系统消息，此方法包括：
步骤S701、响应于与定时提前量TA预补偿参考信息相关的上行同步有效定时器超时，确定TA预补偿参考信息失效。
步骤S702、在承载TA预补偿参考信息的系统消息失效时，发起RLF流程或非RLF流程获取承载TA预补偿参考信息的系统消息；其中，TA预补偿参考信息包括星历信息和公共定时提前量common TA中的至少一种。
在一示例中，承载TA预补偿参考信息的系统消息可以是以下中的一种：MIB、SIB1、SIB2以及窄带物联网(NB-IOT)终端的SIB-22-NB。
在一些可能的实施方式中，步骤S701还包括：无需保证未承载TA预补偿参考信息的系 统消息有效。
在一示例中，MIB、SIB1、SIB2以及窄带物联网(NB-IOT)终端的SIB-22-NB中均不携带星历信息和公共定时提前量common TA时，无需保证MIB、SIB1、SIB2以及窄带物联网(NB-IOT)终端的SIB-22-NB有效。
本公开实施例中，用户设备101需保证承载TA预补偿参考信息的系统消息的有效性，而对于未承载TA预补偿参考信息的系统消息，用户设备101不需保证或维护此系统消息的有效性。
本公开实施例提供了一种上行同步方法，此方法被用户设备101执行。此方法中，预设的系统消息为承载所述TA预补偿参考信息的系统消息，此方法包括如下步骤：
步骤S701，响应于与定时提前量TA预补偿参考信息相关的上行同步有效定时器超时，确定TA预补偿参考信息失效。
步骤S703，在MIB或SIB1失效，以及，基于MIB或SIB1获取用于承载TA预补偿参考信息的系统消息。在承载TA预补偿参考信息的系统消息失效时，发起RLF流程或非RLF流程，基于MIB或SIB1。获取承载TA预补偿参考信息的系统消息；其中，TA预补偿参考信息包括星历信息和公共定时提前量common TA中的至少一种。
在一些可能的实施方式中，在MIB或SIB1失效时，用户设备101基于该失效的MIB或SIB1尝试获取承载TA预补偿参考信息的SIB。
在一些可能的实施方式中，当用户设备101基于失效的MIB或SIB1尝试获取承载TA预补偿参考信息的SIB失败，可在重新获取MIB或SIB1后再获取承载TA预补偿参考信息的SIB。
本公开实施例中，用户设备101可以根据失效的MIB或SIB1获取承载TA预补偿参考信息的系统消息。
本公开实施例提供了一种上行同步方法，此方法被用户设备101执行。此方法中，预设的系统消息为MIB、SIB1和承载TA预补偿参考信息的系统消息，此方法包括：
步骤S801、响应于与定时提前量TA预补偿参考信息相关的上行同步有效定时器超时，确定TA预补偿参考信息失效。
步骤S802、在MIB、SIB1和承载TA预补偿参考信息的系统消息中的任一消息失效时，发起RLF流程或非RLF流程获取承载TA预补偿参考信息的系统消息；其中，TA预补偿参考信息包括星历信息和公共定时提前量common TA中的至少一种。
在一些可能的实施方式中，预设的系统消息包括MIB、SIB1和用于承载TA预补偿参考信息的系统消息。
在一些可能的实施方式中，MIB和SIB1中未承载星历信息和common TA。
在一些可能的实施方式中，若SIB2和NB-IOT终端的SIB-22-NB未承载星历信息和common TA，则不需保证SIB2和SIB-22-NB的有效性。
本公开实施例提供了一种上行同步方法，此方法被用户设备101执行。此方法中，预设的系统消息为SIB1和承载TA预补偿参考信息的系统消息，此方法包括：
步骤S901、响应于与定时提前量TA预补偿参考信息相关的上行同步有效定时器超时，确定TA预补偿参考信息无效。
步骤S902、在SIB1或承载TA预补偿参考信息的系统消息失效时，发起RLF流程或非RLF流程获取承载TA预补偿参考信息的系统消息；其中，TA预补偿参考信息包括星历信息和公共定时提前量common TA中的至少一种。
在一些可能的实施方式中，预设的系统消息包括SIB1和用于承载TA预补偿参考信息的系统消息。
在一些可能的实施方式中，SIB1中未承载星历信息和common TA。
在一些可能的实施方式中，若MIB、SIB2和NB-IOT终端的SIB-22-NB未承载星历信息和common TA，则不需保证SIB2和SIB-22-NB的有效性。
本公开实施例提供了一种上行同步方法，此方法被用户设备101执行。此方法包括：
步骤S600、判断是否能够获取承载所述TA预补偿参考信息的系统消息。
步骤S601-1、用户设备101响应于与定时提前量TA预补偿参考信息相关的上行同步有效定时器超时，确定TA预补偿参考信息失效，发起RLF流程或非RLF流程获取承载TA预补偿参考信息的系统消息；其中，TA预补偿参考信息包括星历信息和公共定时提前量common TA中的至少一种。
本公开实施例中，用户设备101可以检测自身是否能够获取承载星历信息和common TA的系统消息。
本公开实施例提供了一种上行同步方法，此方法被用户设备101执行。此方法包括如下步骤：
步骤S600-1、基于用户设备的实现过程判断是否能够获取预设的系统消息。
步骤S601-1、用户设备101响应于与定时提前量TA预补偿参考信息相关的上行同步有效定时器超时，确定TA预补偿参考信息无效。在TA预补偿参考信息失效时，发起RLF流程或非RLF流程获取承载TA预补偿参考信息的系统消息；其中，TA预补偿参考信息包括星历信息和公共定时提前量common TA中的至少一种。
本公开实施例提供了一种上行同步方法，此方法被用户设备101执行。此方法包括如下步骤：
步骤S600-2、在上行同步有效定时器超时后的设定时长内，未获取到用于承载TA预补偿参考信息的系统消息，确定不能获取承载所述TA预补偿参考信息的系统消息。
步骤S601-1、用户设备101响应于与定时提前量TA预补偿参考信息相关的上行同步有效定时器超时，确定TA预补偿参考信息无效。在TA预补偿参考信息失效时，发起RLF流程或非RLF流程获取承载TA预补偿参考信息的系统消息；其中，TA预补偿参考信息包括星历信息和公共定时提前量common TA中的至少一种。
在一些可能的实施方式中，在上行同步有效定时器超时后，启动一定时器，以该定时器监测上行同步有效定时器超时是否达到设定时长。
在一些可能的实施方式中，在该定时器监测上行同步有效定时器超时未达到设定时长时，用户设备101获取到承载TA预补偿参考信息的系统消息，则将该定时器停止或重置。
本公开实施例提供了一种上行同步方法，此方法被用户设备101执行。此方法包括如下步骤：
步骤S600-2、在上行同步有效定时器超时后的设定时长内，未获取到用于承载TA预补偿参考信息的系统消息，确定不能获取预设的系统消息。
步骤S600-3、在不能获取预设的系统消息时，发起连接重建，或者，执行离开连接态的流程后返回空闲态。
步骤S601-1、用户设备101响应于与定时提前量TA预补偿参考信息相关的上行同步有效定时器超时，确定TA预补偿参考信息失效，发起RLF流程或非RLF流程获取承载TA预补偿参考信息的系统消息；其中，TA预补偿参考信息包括星历信息和公共定时提前量common  TA中的至少一种。
在一些可能的实施方式中，用户设备101返回空闲态(idle态)后，释放原因(release cause)设置为系统消息获取失败。
本公开实施例提供了一种上行同步方法，此方法被用户设备101执行。此方法包括如下步骤：
步骤S1001、RRC层在上行同步有效定时器超时后通知MAC层，以使用户设备停止执行上行发送。
步骤S601、用户设备101响应于与定时提前量TA预补偿参考信息相关的上行同步有效定时器超时，确定TA预补偿参考信息失效，发起RLF流程或非RLF流程获取承载TA预补偿参考信息的系统消息；其中，TA预补偿参考信息包括星历信息和公共定时提前量common TA中的至少一种。
在一些可能的实施方式中，上行同步有效定时器超时后，将引发上行失步。上行失步时，用户设备101不能再进行上行数据发送。上行数据发送行为包括以下中的一种：随机接入、上行调度请求(SR)、配置授权(configured grant)的上行传输以及上行混合自动重传反馈(HARQ feedback)等。
在一些可能的实施方式中，用户设备101在获取到最新的星历信息和common TA前不会发起随机接入。
在一些可能的实施方式中，多媒体接入层(MAC层)获知上行同步有效定时器超时后，可执行上行同步有效定时器超时后的处理流程。
在一些可能的实施方式中，上行同步有效定时器超时包括所有的上行同步有效定时器均超时。
在一示例中，主定时提前组(Primary Timing Advance Group，pTAG)对应的上行同步有效定时器均超时。
在一示例中，pTAG和辅定时提前组(Secondary Timing Advance Group，sTAG)对应的上行同步有效定时器均超时。
本公开实施例提供了一种上行同步方法，此方法被用户设备101执行。此方法包括如下步骤：
步骤S1002、RRC层在上行同步有效定时器超时后通知PHY层，以使PHY层不执行任何上行传输。
步骤S601、用户设备101响应于与定时提前量TA预补偿参考信息相关的上行同步有效定时器超时，确定TA预补偿参考信息失效，发起RLF流程或非RLF流程获取承载TA预补偿参考信息的系统消息；其中，TA预补偿参考信息包括星历信息和公共定时提前量common TA中的至少一种。
在一些可能的实施方式中，物理层(PHY层)获知上行同步有效定时器超时后，暂时禁止任何上行传输。
在一些可能的实施方式中，用户设备101在获取到最新的星历信息和common TA后，可重新发起随机接入，PHY层可以允许此重新发起的随机接入。
本公开实施例提供了一种上行同步方法，此方法被用户设备101执行。此方法包括如下步骤：
步骤S1003、RRC层在上行同步有效定时器超时后向MAC层发送用于指示所述上行同步有效定时器超时的通知信息，以使MAC层不执行除随机接入之外的任何上行传输，其中， 随机接入是响应于获取最新的TA预补偿参考信息后的随机接入。
步骤S601、用户设备101响应于与定时提前量TA预补偿参考信息相关的上行同步有效定时器超时，确定TA预补偿参考信息失效，发起RLF流程或非RLF流程获取承载TA预补偿参考信息的系统消息；其中，TA预补偿参考信息包括星历信息和公共定时提前量common TA中的至少一种。
在一些可能的实施方式中，用户设备101在获取到最新的星历信息和common TA后，可重新发起随机接入。
本公开实施例提供了一种上行同步方法，此方法被用户设备101执行。此方法包括如下步骤：
步骤S1101、在上行同步有效定时器超时后，在RRC层执行以下操作中的至少一个：
释放或禁用所有服务小区的PUCCH或SPUCCH；
释放或禁用所有服务小区的SPS；
释放或禁用NB-IOT的专用SR资源。
步骤S601、用户设备101响应于与定时提前量TA预补偿参考信息相关的上行同步有效定时器超时，确定TA预补偿参考信息失效，发起RLF流程或非RLF流程获取承载TA预补偿参考信息的系统消息；其中，TA预补偿参考信息包括星历信息和公共定时提前量common TA中的至少一种。
本公开实施例中，公开了在上行同步有效定时器超时后，RRC层所能执行的操作。
本公开实施例提供了一种上行同步方法，此方法被用户设备101执行。此方法包括如下步骤：
步骤S1101、在上行同步有效定时器超时后，在RRC层执行以下操作中的至少一个：
释放或禁用所有服务小区的PUCCH/SPUCCH；
释放或禁用所有服务小区的SPS；
释放或禁用NB-IOT的所有专用SR资源。
步骤S601、用户设备101响应于与定时提前量TA预补偿参考信息相关的上行同步有效定时器超时，确定TA预补偿参考信息失效，发起RLF流程或非RLF流程获取承载TA预补偿参考信息的系统消息；其中，TA预补偿参考信息包括星历信息和公共定时提前量common TA中的至少一种。
步骤S1102、在获取到最新的TA预补偿参考信息后，响应于收到MAC层指示获取到基站下发的公共定时提前量common TA，在RRC层执行以下操作中的至少一个：
恢复所有禁用的服务小区(serving cell)的PUCCH或SPUCCH；
恢复所有禁用的服务小区的SPS；
恢复所有禁用的NB-IOT的专用SR资源。
本公开实施例中，公开了在上行同步有效定时器超时后以及获取到新的TA预补偿参考信息后，RRC层所能执行的操作。
本公开实施例提供了一种上行同步方法，此方法被用户设备101执行。此方法包括如下步骤：
步骤S1201、在上行同步有效定时器超时后，MAC层接收到RRC层发送的用于指示上行同步有效定时器超时的通知信息后，执行以下操作中的至少一个：
清空所有服务小区(serving cell)的HARQ缓存；
清空或禁用所有的已配置的下行配置和上行授权(configured downlink assignments and uplink grants)；
发起随机接入；
禁止任何上行传输；
禁止除随机接入之外的任何上行传输。
步骤S601、用户设备101响应于与定时提前量TA预补偿参考信息相关的上行同步有效定时器超时，确定TA预补偿参考信息失效，发起RLF流程或非RLF流程获取承载TA预补偿参考信息的系统消息；其中，TA预补偿参考信息包括星历信息和公共定时提前量common TA中的至少一种。
S1202、在获取到最新的TA预补偿参考信息后，MAC层还可以执行以下操作中的一种：
在获取到公共定时提前量common TA后通知RRC层；
在获取到公共定时提前量common TA后恢复禁用的已配置的下行配置和上行授权。
本公开实施例中，公开了在上行同步有效定时器超时和获取到最新的TA预补偿参考信息，MAC层所能执行的操作。
在一些可能的实施方式中，MAC层发起随机接入可以是直接开始随机接入，或者在用户设备101存在上行数据发送时再随机接入。
本公开实施例提供了一种上行同步方法，此方法被用户设备101执行。此方法包括如下步骤：
步骤S601、用户设备101响应于与定时提前量TA预补偿参考信息相关的上行同步有效定时器超时，确定TA预补偿参考信息失效，发起RLF流程或非RLF流程获取承载TA预补偿参考信息的系统消息；其中，TA预补偿参考信息包括星历信息和公共定时提前量common TA中的至少一种。
S1301、向网络设备发送上行同步有效定时器的超时相关信息；其中，超时相关信息包括以下中的至少一种：
上行同步有效定时器超时时对应的系统帧号(system frame number，SFN)、超帧号(hyper frame number，HFN)或子帧号；
上行同步有效定时器超时时对应的时间；
上行同步有效定时器距超时的剩余时长。
在一些可能的实施方式中，上行同步有效定时器超时时对应的时间包括：起始生效时刻(epoch time)或者协调世界时间(UTC)。
在一些可能的实施方式中，上行同步有效定时器距超时的剩余时长的单位包括：SFN或HFN，epoch time或者UTC时间。
本公开实施例中，用户设备101可以在合适的时机上报第一网络设备102上行同步有效定时器的超时相关信息，以便于第一网络设备102获知上行同步有效定时器何时超时，从而有针对性提前做好准备，比如第一网络设备102可在超时后一段时机内不调度UE。
本公开实施例提供了一种上行同步方法，此方法被用户设备101执行。此方法包括如下步骤：
步骤S601、用户设备101响应于与定时提前量TA预补偿参考信息相关的上行同步有效定时器超时，确定TA预补偿参考信息失效，发起RLF流程或非RLF流程获取承载TA 预补偿参考信息的系统消息；其中，TA预补偿参考信息包括星历信息和公共定时提前量common TA中的至少一种。
S1401、用户设备101执行离开连接态的流程后返回空闲态。
本公开实施例提供了一种上行同步方法，此方法被用户设备101执行。此方法包括如下步骤：
步骤S601、用户设备101响应于与定时提前量TA预补偿参考信息相关的上行同步有效定时器超时，确定TA预补偿参考信息失效，发起RLF流程或非RLF流程获取承载TA预补偿参考信息的系统消息；其中，TA预补偿参考信息包括星历信息和公共定时提前量common TA中的至少一种。
步骤S1501、发起RLF流程之后，执行以下处理中的至少一种：
不发起连接重建
不记录RLF相关报告(RLF report)；
在接入层AS没有激活的情况下保持连接态；
触发获取SIB；
在获取SIB后触发随机接入。
在一些可能的实施方式中，上行同步有效定时器超时后，用户设备101可以宣布无线链路失败(declare RLF)，并可执行步骤S1501中的RLF增强操作。
本公开实施例提供了一种上行同步方法，此方法被第一网络设备102执行。此方法包括如下步骤：
步骤S1601、响应于用户设备101发起RLF流程或非RLF流程，第一网络设备102向用户设备101发送承载TA预补偿参考信息的系统消息；其中，TA预补偿参考信息包括星历信息和公共定时提前量common TA中的至少一种，用户设备用于在与定时提前量TA预补偿参考信息相关的上行同步有效定时器超时，确定TA预补偿参考信息失效后，发起RLF流程或非RLF流程。
采用此方法，第一网络设备102可以在合适的时机，为用户设备发送承载TA预补偿参考信息的系统消息，以便于用户设备能够根据重新获取的TA预补偿参考信息，进行TA预补偿，以保证上行同步。
本公开实施例提供了一种上行同步方法，此方法被第一网络设备102执行。此方法包括如下步骤：
步骤S1601、响应于用户设备101发起RLF流程或非RLF流程，第一网络设备102向用户设备101发送承载TA预补偿参考信息的系统消息；其中，TA预补偿参考信息包括星历信息和公共定时提前量common TA中的至少一种，用户设备用于在与定时提前量TA预补偿参考信息相关的上行同步有效定时器超时，确定TA预补偿参考信息失效后，发起RLF流程或非RLF流程。
步骤S1602、第一网络设备102接收用户设备101发送的上行同步有效定时器的超时相关信息；其中，超时相关信息包括以下中的至少一种：
上行同步有效定时器超时时对应的系统帧号、超帧号或子帧号；
上行同步有效定时器超时时对应的时间；
上行同步有效定时器距超时的剩余时长。
基于与以上方法实施例相同的构思，本公开实施例还提供一种通信装置，该通信装置可具备上述方法实施例中的用户设备101的功能，并用于执行上述实施例提供的由用户设备101执行的步骤。该功能可以通过硬件实现，也可以通过软件或者硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块。
在一种可能的实现方式中，如图7所示的通信装置700可作为上述方法实施例所涉及的用户设备101，并执行上述方法实施例中由用户设备101执行的步骤。如图7所示，该通信装置700可包括收发模块701。该收发模块701可用于支持通信装置700进行通信，收发模块701可具备无线通信功能，例如能够通过无线空口与其他通信装置进行无线通信。
在执行由用户设备101实施的步骤时，收发模块701用于响应于与定时提前量TA预补偿参考信息相关的上行同步有效定时器超时，确定TA预补偿参考信息失效，发起RLF流程或非RLF流程获取承载所述TA预补偿参考信息的系统消息；其中，TA预补偿参考信息包括星历信息和公共定时提前量common TA中的至少一种。
当该通信装置为用户设备101时，其结构还可如图8所示。装置800可以是移动电话，计算机，数字广播终端，消息收发设备，游戏控制台，平板设备，医疗设备，健身设备，个人数字助理等。
参照图8，装置800可以包括以下一个或多个组件：处理组件802，存储器804，电源组件806，多媒体组件808，音频组件810，输入/输出(I/O)的接口812，传感器组件814，以及通信组件816。
处理组件802通常控制装置800的整体操作，诸如与显示，电话呼叫，数据通信，相机操作和记录操作相关联的操作。处理组件802可以包括一个或多个处理器820来执行指令，以完成上述的方法的全部或部分步骤。此外，处理组件802可以包括一个或多个模块，便于处理组件802和其他组件之间的交互。例如，处理组件802可以包括多媒体模块，以方便多媒体组件808和处理组件802之间的交互。
存储器804被配置为存储各种类型的数据以支持在设备800的操作。这些数据的示例包括用于在装置800上操作的任何应用程序或方法的指令，联系人数据，电话簿数据，消息，图片，视频等。存储器804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，如静态随机存取存储器(SRAM)，电可擦除可编程只读存储器(EEPROM)，可擦除可编程只读存储器(EPROM)，可编程只读存储器(PROM)，只读存储器(ROM)，磁存储器，快闪存储器，磁盘或光盘。
电源组件806为装置800的各种组件提供电力。电源组件806可以包括电源管理系统，一个或多个电源，及其他与为装置800生成、管理和分配电力相关联的组件。
多媒体组件808包括在装置800和用户之间的提供一个输出接口的屏幕。在一些实施例中，屏幕可以包括液晶显示器(LCD)和触摸面板(TP)。如果屏幕包括触摸面板，屏幕可以被实现为触摸屏，以接收来自用户的输入信号。触摸面板包括一个或多个触摸传感器以感测触摸、滑动和触摸面板上的手势。触摸传感器可以不仅感测触摸或滑动动作的边界，而且还检测与所述触摸或滑动操作相关的持续时间和压力。在一些实施例中，多媒体组件808包括一个前置摄像头和/或后置摄像头。当设备800处于操作模式，如拍摄模式或视频模式时，前置摄像头和/或后置摄像头可以接收外部的多媒体数据。每个前置摄像头和后置摄像头可以是一个固定的光学透镜系统或具有焦距和光学变焦能力。
音频组件810被配置为输出和/或输入音频信号。例如，音频组件810包括一个麦克风(MIC)，当装置800处于操作模式，如呼叫模式、记录模式和语音识别模式时，麦克风被配置为接收外部音频信号。所接收的音频信号可以被进一步存储在存储器804或经由通信组件816发送。在一些实施例中，音频组件810还包括一个扬声器，用于输出音频信号。
I/O接口812为处理组件802和外围接口模块之间提供接口，上述外围接口模块可以是键盘，点击轮，按钮等。这些按钮可包括但不限于：主页按钮、音量按钮、启动按钮和锁定按钮。
传感器组件814包括一个或多个传感器，用于为装置800提供各个方面的状态评估。例如，传感器组件814可以检测到设备800的打开/关闭状态，组件的相对定位，例如所述组件为装置800的显示器和小键盘，传感器组件814还可以检测装置800或装置800一个组件的位置改变，用户与装置800接触的存在或不存在，装置800方位或加速/减速和装置800的温度变化。传感器组件814可以包括接近传感器，被配置用来在没有任何的物理接触时检测附近物体的存在。传感器组件814还可以包括光传感器，如CMOS或CCD图像传感器，用于在成像应用中使用。在一些实施例中，该传感器组件814还可以包括加速度传感器，陀螺仪传感器，磁传感器，压力传感器或温度传感器。
通信组件816被配置为便于装置800和其他设备之间有线或无线方式的通信。装置800可以接入基于通信标准的无线网络，如WiFi，4G或5G，或它们的组合。在一个示例性实施例中，通信组件816经由广播信道接收来自外部广播管理系统的广播信号或广播相关信息。在一个示例性实施例中，所述通信组件816还包括近场通信(NFC)模块，以促进短程通信。例如，在NFC模块可基于射频识别(RFID)技术，红外数据协会(IrDA)技术，超宽带(UWB)技术，蓝牙(BT)技术和其他技术来实现。
在示例性实施例中，装置800可以被一个或多个应用专用集成电路(ASIC)、数字信号处理器(DSP)、数字信号处理设备(DSPD)、可编程逻辑器件(PLD)、现场可编程门阵列(FPGA)、控制器、微控制器、微处理器或其他电子元件实现，用于执行上述方法。
基于与以上方法实施例相同的构思，本公开实施例还提供一种通信装置，该通信装置可具备上述方法实施例中的第一网络设备102的功能，并用于执行上述实施例提供的由第一网络设备102执行的步骤。该功能可以通过硬件实现，也可以通过软件或者硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块。
在一种可能的实现方式中，如图9所示的通信装置900可作为上述方法实施例所涉及的第一网络设备102，并执行上述方法实施例中由第一网络设备102执行的步骤。如图9所示，该通信装置900可包括收发模块901。该收发模块901可用于支持通信装置900进行通信，收发模块901可具备无线通信功能，例如能够通过无线空口与其他通信装置进行无线通信。
在执行由第一网络设备102实施的步骤时，收发模块901用于响应于用户设备发起RLF流程或非RLF流程，向用户设备发送承载TA预补偿参考信息的系统消息；其中，TA预补偿参考信息包括星历信息和公共定时提前量common TA中的至少一种，用户设备用于在与定时提前量TA预补偿参考信息相关的上行同步有效定时器超时，确定TA预补偿参考信息失效后，发起RLF流程或非RLF流程。
当该通信装置为第一网络设备102时，其结构还可如图10所示。如图10所示，装置1000包括存储器1001、处理器1002、收发组件1003、电源组件1006。其中，存储器1001与处理器1002耦合，可用于保存通信装置1000实现各功能所必要的程序和数据。该处理器1002被配置为支持通信装置1000执行上述方法中相应的功能，此功能可通过调用存储器1001存储的程序实现。收发组件1003可以是无线收发器，可用于支持通信装置1000通过无线空口进行接收信令和/或数据，以及发送信令和/或数据。收发组件1003也可被称为收发单元或通信单元，收发组件1003可包括射频组件1004以及一个或多个天线1005，其中，射频组件1004可以是远端射频单元(remote radio unit，RRU)，具体可用于射频信号的传输以及射频信号与基带信号的转换，该一个或多个天线1005具体可用于进行射频信号的辐射和接收。
当通信装置1000需要发送数据时，处理器1002可对待发送的数据进行基带处理后，输出基带信号至射频单元，射频单元将基带信号进行射频处理后将射频信号通过天线以电磁波的形式进行发送。当有数据发送到通信装置1000时，射频单元通过天线接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器1002，处理器1002将基带信号转换为数据并对该数据进行处理。
本领域技术人员在考虑说明书及实践这里公开的发明后，将容易想到本公开实施例的其它实施方案。本申请旨在涵盖本公开实施例的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本公开实施例的一般性原理并包括本公开未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本公开实施例的真正范围和精神由下面的权利要求指出。
应当理解的是，本公开实施例并不局限于上面已经描述并在附图中示出的精确结构，并且可以在不脱离其范围进行各种修改和改变。本公开实施例的范围仅由所附的权利要求来限制。
工业实用性
用户设备能够在TA预补偿参考信息失效时，主动向第一网络设备获取承载TA预补偿参考信息的系统消息，从而能够重新获知当前有效的TA预补偿参考信息，以便于能够进行TA预补偿，保证上行同步。并且，用户设备既可以通过发起RLF流程主动获取系统消息，也可以通过发起非RLF流程获取系统消息，从而使处于连接态的用户设备均可以通过获取系统消息的方式获得TA预补偿参考信息。

Claims (23)

  1. 一种上行同步方法，此方法被用户设备执行，包括：
    响应于与定时提前量TA预补偿参考信息相关的上行同步有效定时器超时，确定TA预补偿参考信息失效，发起RLF流程或非RLF流程获取承载所述TA预补偿参考信息的系统消息；其中，所述TA预补偿参考信息包括星历信息和公共定时提前量common TA中的至少一种。
  2. 如权利要求1所述的方法，其中，
    所述发起RLF流程或非RLF流程获取承载所述TA预补偿参考信息的系统消息包括：
    在预设的系统消息无效时，发起RLF流程或非RLF流程获取承载所述TA预补偿参考信息的系统消息；其中，所述预设的系统消息包括承载所述TA预补偿参考信息的系统消息。
  3. 如权利要求1所述的方法，其中，
    所述方法还包括：
    判断是否能够获取所述承载所述TA预补偿参考信息的系统消息。
  4. 如权利要求3所述的方法，其中，
    所述判断是否能够获取承载所述TA预补偿参考信息的系统消息，包括：
    基于用户设备的实现过程判断是否能够获取所述预设的系统消息。
  5. 如权利要求3所述的方法，其中，
    所述判断是否能够获取所述承载所述TA预补偿参考信息的系统消息，包括：
    在所述上行同步有效定时器超时后的设定时长内，未获取到用于承载所述TA预补偿参考信息的系统消息，确定不能获取所述承载所述TA预补偿参考信息的系统消息。
  6. 如权利要求3所述的方法，其中，
    所述方法还包括：
    在不能获取所述预设的系统消息时，发起连接重建，或者，执行离开连接态的流程后返回空闲态。
  7. 如权利要求1所述的方法，其中，
    所述方法还包括：
    RRC层在所述上行同步有效定时器超时后通知MAC层，以使所述所述用户设备停止执行上行发送。
  8. 如权利要求1所述的方法，其中，
    所述方法还包括：
    RRC层在所述上行同步有效定时器超时后通知PHY层，以使PHY层不执行任何上行传输。
  9. 如权利要求1所述的方法，其中，
    所述方法还包括：
    RRC层在所述上行同步有效定时器超时后向MAC层发送用于指示所述上行同步有效定时器超时的通知信息，以使MAC层不执行除随机接入之外的任何上行传输，其中，所 述随机接入是响应于获取最新的TA预补偿参考信息后的随机接入。
  10. 如权利要求1所述的方法，其中，
    所述方法还包括：
    在所述上行同步有效定时器超时后，在RRC层执行以下操作中的至少一个：
    释放或禁用所有服务小区的PUCCH或SPUCCH；
    释放或禁用所有服务小区的SPS；
    释放或禁用NB-IOT的专用SR资源。
  11. 如权利要求1所述的方法，其中，
    所述方法还包括：
    在获取到最新的TA预补偿参考信息后，响应于收到MAC层指示获取到基站下发的公共定时提前量common TA，在RRC层执行以下操作中的至少一个：
    恢复所有禁用的服务小区的PUCCH或SPUCCH；
    恢复所有禁用的服务小区的SPS；
    恢复所有禁用的NB-IOT的专用SR资源。
  12. 如权利要求1所述的方法，其中，
    所述方法还包括：
    在所述上行同步有效定时器超时后，响应于MAC层接收到RRC层发送的用于指示上行同步有效定时器超时的通知信息后，执行以下操作中的至少一个：
    清空所有服务小区的HARQ缓存；
    清空或禁用所有的已配置的下行配置和上行授权；
    发起随机接入；
    禁止任何上行传输；
    禁止除随机接入之外的任何上行传输；
    在获取到公共定时提前量common TA后通知RRC层；
    在获取到公共定时提前量common TA后恢复禁用的已配置的下行配置和上行授权。
  13. 如权利要求1所述的方法，其中，
    所述方法还包括：
    向网络设备发送所述上行同步有效定时器的超时相关信息；其中，所述超时相关信息包括以下中的至少一种：
    所述上行同步有效定时器超时时对应的系统帧号、超帧号或子帧号；
    所述上行同步有效定时器超时时对应的时间；
    所述上行同步有效定时器距超时的剩余时长。
  14. 如权利要求1所述的方法，其中，
    所述方法还包括：
    所述用户设备执行离开连接态的流程后返回空闲态。
  15. 如权利要求1所述的方法，其中，
    所述方法还包括：
    发起RLF流程之后，执行以下处理中的至少一种：
    不发起连接重建
    不记录RLF相关报告；
    在接入层AS没有激活的情况下保持连接态；
    触发获取SIB；
    在获取SIB后触发随机接入。
  16. 一种上行同步方法，此方法被第一网络设备执行，包括：
    响应于用户设备发起RLF流程或非RLF流程，向用户设备发送承载TA预补偿参考信息的系统消息；其中，所述TA预补偿参考信息包括星历信息和公共定时提前量common TA中的至少一种，所述用户设备用于在与定时提前量TA预补偿参考信息相关的上行同步有效定时器超时，确定TA预补偿参考信息失效后，发起RLF流程或非RLF流程。
  17. 如权利要求16所述的方法，其中，
    所述方法还包括：
    接收所述用户设备发送的所述上行同步有效定时器的超时相关信息；其中，所述超时相关信息包括以下中的至少一种：
    所述上行同步有效定时器超时时对应的系统帧号、超帧号或子帧号；
    所述上行同步有效定时器超时时对应的时间；
    所述上行同步有效定时器距超时的剩余时长。
  18. 一种通信装置，包括：
    收发模块，用于响应于与定时提前量TA预补偿参考信息相关的上行同步有效定时器超时，确定TA预补偿参考信息失效，发起RLF流程或非RLF流程获取承载所述TA预补偿参考信息的系统消息；其中，所述TA预补偿参考信息包括星历信息和公共定时提前量common TA中的至少一种。
  19. 一种通信装置，包括：
    收发模块，用于响应于用户设备发起RLF流程或非RLF流程，向用户设备发送承载TA预补偿参考信息的系统消息；其中，所述TA预补偿参考信息包括星历信息和公共定时提前量common TA中的至少一种，所述用户设备用于在与定时提前量TA预补偿参考信息相关的上行同步有效定时器超时，确定TA预补偿参考信息失效后，发起RLF流程或非RLF流程。
  20. 一种通信装置，包括处理器以及存储器；
    所述存储器用于存储计算机程序；
    所述处理器用于执行所述计算机程序，以实现如权利要求1-15中任一项所述的方法。
  21. 一种通信装置，包括处理器以及存储器；
    所述存储器用于存储计算机程序；
    所述处理器用于执行所述计算机程序，以实现如权利要求16-17中任一项所述的方法。
  22. 一种计算机可读存储介质，所述计算机可读存储介质中存储有指令，当所述指令在计算机上被调用执行时，使得所述计算机执行如权利要求1-15中任一项所述的方法。
  23. 一种计算机可读存储介质，所述计算机可读存储介质中存储有指令，当所述指令在计算机上被调用执行时，使得所述计算机执行如权利要求16-17中任一项所述的方法。
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