WO2019029700A1 - Procédé de synchronisation, procédé de soumission et dispositif correspondant - Google Patents

Procédé de synchronisation, procédé de soumission et dispositif correspondant Download PDF

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Publication number
WO2019029700A1
WO2019029700A1 PCT/CN2018/099955 CN2018099955W WO2019029700A1 WO 2019029700 A1 WO2019029700 A1 WO 2019029700A1 CN 2018099955 W CN2018099955 W CN 2018099955W WO 2019029700 A1 WO2019029700 A1 WO 2019029700A1
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WIPO (PCT)
Prior art keywords
tbl
downlink
target
original
uplink
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PCT/CN2018/099955
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English (en)
Chinese (zh)
Inventor
苏厉
王昭诚
徐凯
孙彦良
庄宏成
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华为技术有限公司
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Publication of WO2019029700A1 publication Critical patent/WO2019029700A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/28—Cell structures using beam steering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements

Definitions

  • the present application relates to the field of communications technologies, and in particular, to a synchronization method, a reporting method, and a corresponding device.
  • the millimeter wave high frequency band (for example, higher than 6 GHz band) has a signal frequency bandwidth and a short wavelength, which is advantageous for realizing a large-scale antenna array, but the signal of the frequency band also has the disadvantages of high path loss, poor coverage, and path susceptibility, and A narrow directional beam (beam) for signal transmission can make up for the above shortcomings and improve signal reception power and coverage performance within the cell.
  • the beam needs to be switched frequently to improve the stability of the communication.
  • the frequency of beam switching occurs much more than the user access or handover in the normal mobile communication scenario.
  • the synchronization time needs to be adjusted.
  • the synchronization method during beam switching is expensive, resulting in a heavy system load.
  • the present invention provides a synchronization method, a reporting method, and a corresponding device, which are used to solve the problem that the synchronization method in the prior art has a large overhead.
  • the present application provides a synchronization method, where the method includes: receiving, by a terminal device, control signaling sent by a network device, where the control signaling includes an indication parameter indicating a target beam after beam switching; the terminal device responding to the The control signaling performs beam switching according to the indication parameter, and adjusts the synchronization time according to the synchronization time adjustment amount.
  • the synchronization time adjustment may be included in the control signaling, or may be determined by the network device.
  • the synchronization time adjustment may be used to measure the delay of the signal transmitted through the target beam and transmitted through the original beam.
  • the terminal device can perform time synchronization after beam switching according to the synchronization time adjustment amount, and the implementation manner is simple, and the system overhead is small.
  • the original beam is an original downlink beam
  • the target beam is a target downlink beam
  • the control signaling is used to indicate that the terminal device
  • the receiving beam is switched by the receiving beam corresponding to the original downlink beam to the receiving beam corresponding to the target downlink beam.
  • the synchronization implementation after the downlink beam switching is simple and the efficiency is high.
  • the terminal device can adjust the synchronization time according to the synchronization time, it is not necessary to use the CP to achieve synchronization between the beams, so the length of the CP can be short, thereby improving the utilization efficiency of the system spectrum.
  • the terminal device may perform downlink beam measurement to obtain a chain of a transmission path of a beam pair in which each downlink beam is located a quality parameter of the path and a TBL of each downlink beam; the terminal device reports the link quality parameter and the TBL corresponding to the at least two downlink beams to the network device, where the at least two downlink beams include the original downlink The beam and the target downlink beam, the selection of the at least two downlink beams depends on the implementation of the terminal device.
  • the terminal device reports the measurement results (link quality parameters and TBL) of all downlink beams, in another In some embodiments, the terminal device reports a measured number of downlink beam measurements with better link quality. In some embodiments, the terminal device reports a downlink beam measurement result whose link quality meets the set requirement. Since the network device obtains the TBL of the downlink beam, the synchronization time adjustment amount may be determined according to the TBL of the target downlink beam and the TBL of the original downlink beam, and the synchronization time adjustment amount is added to the control signaling, so that the terminal device can perform the synchronization according to the synchronization. The amount of time adjustment adjusts the synchronization time.
  • the terminal device can adjust the synchronization time according to the TBL difference of the beam before and after the switching, it is not necessary to use the CP to achieve synchronization between the beams, so the length of the CP can be short, thereby improving the utilization efficiency of the system spectrum.
  • the terminal device may perform downlink beam measurement to obtain a chain of transmission paths of beam pairs in which each downlink beam is located. a path quality parameter and a TBL of each downlink beam; then, the terminal device reports, to the network device, a beam parameter of at least one downlink beam group, where a beam parameter of any downlink beam group includes each downlink beam in the downlink beam group Corresponding to the link quality parameter and the TBL of the downlink beam group, the at least one downlink beam group includes a beam group in which the original downlink beam is located and a beam group in which the target downlink beam is located.
  • the network device obtains the TBL of the beam group where the downlink beam is located, so the synchronization time adjustment amount can be determined according to the TBL of the beam group where the target downlink beam is located and the TBL of the beam group where the original downlink beam is located, and then the synchronization time adjustment is added to the control signaling.
  • the amount is such that the terminal device can adjust the synchronization time according to the synchronization time adjustment amount.
  • the terminal device since the terminal device can adjust the synchronization time according to the TBL difference of the beam group where the beam is located before and after the handover, the CP does not need to use the CP to achieve synchronization between the beams, so the length of the CP can be shorter, thereby improving the utilization of the system spectrum. effectiveness.
  • the TBL of each beam in the beam group can be not reported, the amount of reported data can be reduced, and the overhead of reporting the downlink beam measurement report can be reduced.
  • the terminal device may measure a TBL of each downlink beam, and then, after receiving the control signaling, read The measured TBL of the target downlink beam and the TBL of the original downlink beam are determined, and the difference between the two is determined as the synchronization time adjustment amount. After the downlink beam switching is performed, the synchronization time is adjusted according to the synchronization time adjustment amount. In this implementation manner, the terminal device may not report the TBL of the beam/beam group to the network device, which may reduce the amount of reported data and reduce the overhead of reporting the downlink beam measurement report.
  • the target beam is a target uplink beam
  • the original beam is an original uplink beam
  • the control signaling is used to indicate that the terminal device
  • the transmit beam is switched by the original uplink beam to the target uplink beam
  • the control signaling further includes the synchronization time adjustment amount.
  • the synchronization time adjustment quantity is a TBL of the target uplink beam and a TBL of the original uplink beam
  • the difference, the TBL of any beam is the difference between the time-consuming and the reference duration of the transmission of the signal through the transmission path of the beam pair in which the beam is located, the beam pair including a transmit beam and its corresponding receive beam
  • the target uplink The TBL of the beam and the TBL of the original upstream beam can be measured by the network device.
  • the terminal device may perform downlink beam measurement to obtain a TBL of each downlink beam; and then, the terminal device reports at least two to the network device.
  • the TBL of the downlink beam when the network device can determine the uplink beam switching, based on the beam correspondence between the uplink beam and the downlink beam, the TBL of the downlink beam having the beam correspondence with the target uplink beam and the original uplink.
  • the difference between the TBL of the beam having the beam-corresponding downlink beam is used as the synchronization time adjustment amount, and the synchronization time adjustment amount is added to the control command, and the network device can adjust the synchronization time after performing the uplink beam switching according to the synchronization time adjustment amount.
  • the network device may not measure the TBL of the uplink beam, and reduce the burden on the network device.
  • an embodiment of the present invention provides a synchronization method, where the method includes: determining, by a network device, a target beam of a beam handover and a synchronization time adjustment amount; the network device sends control signaling to the terminal device, where the control signaling includes an indication The indication parameter of the target beam and the synchronization time adjustment amount, the control signaling is used to instruct the terminal device to perform beam switching according to the indication parameter, and adjust the synchronization time according to the synchronization time adjustment amount.
  • the terminal device can perform time synchronization after beam switching according to the synchronization time adjustment amount, and the implementation manner is simple, and the system overhead is small.
  • the original beam is an original downlink beam
  • the target beam is a target downlink beam
  • the control signaling is used to indicate that the terminal device
  • the receiving beam is switched by the receiving beam corresponding to the original downlink beam to the receiving beam corresponding to the target downlink beam.
  • the synchronization implementation after the downlink beam switching is simple and the efficiency is high.
  • the terminal device can adjust the synchronization time according to the synchronization time, it is not necessary to use the CP to achieve synchronization between the beams, so the length of the CP can be short, thereby improving the utilization efficiency of the system spectrum.
  • the synchronization time adjustment quantity is a TBL of the target downlink beam and a TBL of the original downlink beam
  • the difference, the TBL of the target downlink beam and the TBL of the original downlink beam may be measured by the terminal device and reported to the network device, and the network device adds the difference between the TBL of the target downlink beam and the TBL of the original downlink beam to the control signaling.
  • the terminal device is instructed to adjust the synchronization time according to the difference.
  • the terminal device can adjust the synchronization time according to the TBL difference of the beam before and after the switching, it is not necessary to use the CP to achieve synchronization between the beams, so the length of the CP can be short, thereby improving the utilization efficiency of the system spectrum.
  • the synchronization time adjustment quantity is a TBL of the beam group where the target downlink beam is located, and the original downlink
  • the difference between the TBL of the beam group in which the beam is located, the TBL of the beam group in which the target downlink beam is located, and the TBL of the beam group in which the original downlink beam is located may be measured by the terminal device and reported to the network device, and the network device sets the beam group of the target downlink beam.
  • the difference between the TBL and the TBL of the beam group in which the original downlink beam is located is added to the control signaling, and the terminal device is instructed to adjust the synchronization time according to the difference.
  • the terminal device can adjust the synchronization time according to the TBL difference of the beam group where the beam is located before and after the handover, the CP does not need to use the CP to achieve synchronization between the beams, so the length of the CP can be shorter, thereby improving the utilization of the system spectrum. effectiveness.
  • the network device may measure the TBL of the uplink beam, and based on the beam correspondence between the downlink beam and the uplink beam, The difference between the TBL of the uplink beam of the target downlink beam having the beam correspondence and the TBL of the uplink beam having the beam correspondence with the original downlink beam is used as the synchronization time adjustment amount, and the synchronization time adjustment is added in the control signaling.
  • the quantity indicates that the terminal device adjusts the synchronization time according to the difference.
  • the network device may not report the TBL of the downlink beam, reduce the amount of data transmission between the network device and the terminal device, and reduce the resource consumption of the synchronization.
  • the target beam is a target uplink beam
  • the original beam is an original uplink beam
  • the network device may measure a TBL of the uplink beam
  • the The difference between the TBL of the target uplink beam and the TBL of the original uplink beam is used as the synchronization time adjustment amount, and the synchronization time adjustment amount is added in the control signaling, and the terminal device is instructed to adjust the synchronization time according to the difference.
  • the terminal device can adjust the synchronization time according to the synchronization time, the complicated random access synchronization process is avoided, and the system overhead is small.
  • the embodiment of the present invention provides a reporting method, including: performing downlink beam measurement on a terminal device, and obtaining a TBL of each downlink beam, where the TBL of the beam is a time-consuming transmission of the signal through the transmission path of the beam pair where the beam is located.
  • the beam pair includes a transmit beam and a corresponding receive beam
  • the terminal device reports a downlink beam measurement report to the network device, where the downlink beam measurement report includes a TBL of at least two downlink beams; Or the downlink beam measurement report includes a TBL of at least one downlink beam group, where any downlink beam group includes at least one downlink beam, and when the number of beams in the downlink beam group is greater than 1, any two of the downlink beam groups are downlink.
  • the difference of the TBL of the beam is less than a set threshold, and the TBL of any downlink beam set is a value within a range of a minimum TBL to a maximum TBL of the TBLs of all downlink beams in the downlink beam set.
  • the terminal device can measure the TBL of each downlink beam in the downlink beam measurement, and report the TBL of the downlink beam to the network device, so that the network device can know the relative delay of the signal transmission through different downlink beams, which is convenient for the network device. Manage the communication of the terminal device.
  • the embodiment of the present invention provides a terminal device, where the terminal device is configured to perform any of the foregoing first aspect, any possible implementation of the first aspect, the third aspect, and any possible implementation of the third aspect.
  • the terminal device comprises means for performing the method of any of the above first aspect, any possible implementation of the first aspect, the third aspect, any possible implementation of the third aspect.
  • the terminal device includes a memory, where the instruction is stored, and the transceiver is configured to communicate with the network device;
  • a processor communicatively coupled to the memory and the transceiver, respectively, for executing instructions in the memory to perform the first aspect, any possible implementation of the first aspect, and the third aspect by the transceiver The method of any of the possible implementations of the third aspect.
  • an embodiment of the present invention provides a network device, where the network device is configured to perform the foregoing method according to any of the foregoing aspects or the second aspect.
  • the network device comprises means for performing any of the methods described above for implementing the second aspect or the second aspect.
  • the network device includes a memory, where the instructions are stored; the transceiver is configured to communicate with the terminal device; and the processor is in communication connection with the memory and the transceiver, respectively, for executing instructions in the memory, The method of any of the second or second aspects of the method is performed by the transceiver.
  • the present application provides a computer readable storage medium having stored therein computer instructions that, when executed on a computer, cause the computer to perform any of the first aspect, the first aspect Implementation, the second aspect, any possible implementation of the second aspect, the method of any of the third aspects.
  • the application provides a computer program product, when the computer program product is run on a computer, causing the computer to perform the first aspect, any possible implementation of the first aspect, the second aspect, and any of the second aspect A possible implementation, the method of any of the third aspects.
  • 1a-1b are schematic diagrams of uplink and downlink beams
  • FIG. 3 is a schematic diagram of uplink synchronization in the prior art
  • FIG. 4 to FIG. 9 are schematic flowcharts of a synchronization method according to an embodiment of the present invention.
  • FIG. 10 is a schematic flowchart diagram of a reporting method according to an embodiment of the present invention.
  • FIG. 12 are schematic diagrams of a terminal device according to an embodiment of the present invention.
  • FIG. 13 is a schematic diagram of a network device according to an embodiment of the present invention.
  • the present invention provides a synchronization method, a reporting method, and a corresponding device, which are used to solve the problem that the synchronization method in the prior art has a large overhead.
  • the method and the device are based on the same inventive concept. Since the principles of the method and the device for solving the problem are similar, the implementation of the device and the method can be referred to each other, and the repeated description is not repeated.
  • the plurality referred to in the present application means two or more.
  • the terms “first”, “second” and the like are used only to distinguish the purpose of description, and are not to be understood as indicating or implying relative importance, nor as an indication. Or suggest the order.
  • the embodiments of the present invention can be applied to a 5th-generation mobile communication (5G) system, and can also be applied to other wireless communication systems, such as a Long Term Evolution (LTE) system, and a global mobile communication system (Global).
  • 5G 5th-generation mobile communication
  • LTE Long Term Evolution
  • Global Global mobile communication system
  • GSM Global System for Mobile Communication
  • UMTS Universal Mobile Telecommunications System
  • CDMA Code Division Multiple Access
  • the terminal device may be a device that provides voice and/or data connectivity to the user, a handheld device with wireless connectivity, or other processing device that is connected to the wireless modem.
  • the wireless terminal device can communicate with one or more core networks via a Radio Access Network (RAN), which can be a mobile terminal, such as a mobile phone (or "cellular" phone) and has a mobile terminal
  • RAN Radio Access Network
  • the computers for example, can be portable, pocket-sized, handheld, computer-integrated or in-vehicle mobile devices that exchange language and/or data with the wireless access network.
  • PCS Personal Communication Service
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDAs Personal Digital Assistants
  • the wireless terminal device may also be referred to as a system, a Subscriber Unit, a Subscriber Station, a Mobile Station, a Mobile, a Remote Station, and an Access Point. , Remote Terminal, Access Terminal, User Terminal, User Agent, User Device, or User Equipment (UE).
  • UE User Equipment
  • the network device may be a base station, and the base station may be a base station (gNode B, gNB) in 5G communication, or an evolved base station (evolutional Node B, eNB or e-NodeB) in LTE, a base station in GSM or CDMA.
  • BTS Base Transceiver Station
  • NodeB base station
  • WCDMA Wideband CDMA
  • the downlink beam which is an abbreviation of the downlink transmission beam of the base station in the embodiment of the present invention, refers to FIG. 1a.
  • the uplink beam which is an abbreviation of the uplink transmission beam of the UE in the embodiment of the present invention, refers to FIG. 1b.
  • Beam training including downlink beam training and uplink beam training.
  • the base station transmits signals through different downlink beams.
  • the UE can receive through different receiving beams to determine a better receiving beam corresponding to the downlink beam, and then determine to adopt the signal.
  • a preferred receive beam receives the signal transmitted by the downlink beam.
  • the uplink beam is trained, the UE transmits signals through different uplink beams.
  • the UE can receive through different receiving beams to determine a better receiving beam corresponding to the uplink beam, and further It is determined that the preferred receive beam is used to receive the signal transmitted by the uplink beam.
  • beam training further includes selecting one or more beam pairs from all measured beam pairs according to a certain principle as a downlink/uplink transmission beam candidate set.
  • a beam pair includes a transmit beam and a receive beam determined by beam training for receiving a signal transmitted via the transmit beam. For example, a downlink beam and a receiving beam of a signal transmitted by the UE side to receive the downlink beam are one beam pair, and an uplink beam and a receiving beam of the signal transmitted by the base station side to receive the uplink beam are a beam pair.
  • the time delay of beam link (TBL), the TBL of the beam is the difference between the time consuming and the reference duration of the transmission path of the beam pair through which the beam passes.
  • the TBL is used to measure the time-consuming deviation of the signal transmission through the beam pair where the different beams are located. It is not the absolute time-consuming transmission of the beam pair through which the beam passes, but the deviation between the absolute time and the reference duration.
  • the reference duration may be the transmission time of the signal passing through the beam pair where any beam is located, or may be other types of reference durations, such as the duration of the set number of subframes.
  • the reference duration corresponding to the TBL of the downlink beam may be the same as or different from the reference duration of the TBL of the uplink beam.
  • the absolute time consumption of the signal passing through the beam pair of the beam may not be measured, and the deviation of the transmission time from the reference duration may be directly measured. In other words, the value of the reference duration may not be measured.
  • a beam group includes one transmission beam or a plurality of transmission beams in the same direction, for example, a beam group composed of a plurality of downlink beams, or a beam group composed of a plurality of uplink beams.
  • the TBL of the beam in the beam group is required to be close, that is, the difference between the TBLs of any two beams in the beam group is not greater than a set threshold, and the set threshold may be a smaller experience. value.
  • the TBL of the beam group because the TBL of the beam in the beam group is relatively close, can take a value to characterize the TBL of all beams in the beam group, which is the TBL of the beam group.
  • the value of the TBL of the beam set is a value within the range of the smallest TBL (expressed as TBL min ) to the maximum TBL (expressed as TBL max ) of the TBL of all beams in the beam set, ie, within the interval [TBL min , TBL max ]
  • Any value, such as the TBL of the beam set may be the TBL of any beam in the beam set, such as TBL min , TBL max or the median of the TBL of all beams in the beam set, and the TBL of the beam set may also be in the beam set.
  • the average of the TBL of all beams such as the arithmetic mean, geometric mean, and so on.
  • the beam set includes only one beam, and the TBL of the beam set is the same as the TBL
  • the uplink beam and the downlink beam may be said to have beam correspondence. If the uplink beam A and the downlink beam B have beam correspondence, the TBL of the uplink beam A can be used as the TBL of the downlink beam B.
  • the CP can be used for downlink synchronization.
  • CP cyclic prefix
  • OFDM orthogonal frequency-division multiplexing
  • Two CP lengths are set in the existing system: one is called a regular CP, and its length is 7% of the entire symbol length; the other is called an extended CP, which is 25% of the length of the entire symbol.
  • the length of the regular CP is 4.7 us
  • the length of the extended CP is 16.7 us
  • the length of the CP of the first OFDM symbol in the slot is greater than the length of the CP of other OFDM symbols.
  • the choice of CP length depends on the application environment, and often requires a larger coverage or a longer CP setting in a more complex wireless environment.
  • CP length is closely related to the spectrum utilization of the wireless channel, and a larger CP length will bring about a decrease in frequency utilization.
  • the subcarrier spacing becomes larger in the communication, and the symbol period becomes shorter.
  • the length of the CP needs to be ensured, resulting in an increasing proportion of the overhead of the cyclic prefix.
  • the spectrum utilization rate has dropped rapidly.
  • the prior art is generally implemented by a method based on random access (RA).
  • RA random access
  • the base station allocates a random access channel (RACH) resource in the uplink transmission time slot, and the user is in the Sending a preamble on the random access channel
  • the base station receives the preamble sequence, and calculates a timing offset (such as a timing advance (TA)) between the user and the base station through the processing thereof, and then passes the timing offset
  • TA timing advance
  • the signaling for example, a random access response (RAR)
  • RAR random access response
  • the timing synchronization is expensive and the time is long, and is applicable to a scenario that does not require frequent timing synchronization, such as 4G LTE.
  • a long uplink timing synchronization time will cause long-term data transmission interruption, and a complicated synchronization process will reduce the spectrum utilization of the system and improve the processing of the base station. load.
  • the synchronization method provided by the embodiment of the present invention is described below. Referring to FIG. 4, the method includes the following steps:
  • Step 11 The base station determines that beam switching needs to be performed, and determines a target beam to be switched to.
  • the base station determines that the beam handover needs to be performed in various manners, such as poor quality of the current communication, a change of the cell where the UE is located, a change of the tracking area where the UE is located, and the like.
  • the manner in which the base station determines the target beam also has various implementation manners. Reference may be made to various implementations of the base station in the prior art, which are not limited in the embodiment of the present invention.
  • Step 12 The base station sends control signaling to the UE, where the control signaling includes an indication parameter indicating a target beam after the beam switching.
  • Step 13 The UE receives control signaling.
  • Step 14 The UE responds to the control signaling, performs beam switching according to the control signaling, and adjusts the synchronization time according to the synchronization time adjustment amount.
  • the synchronization time adjustment may be included in the control signaling, or may be determined by the base station.
  • the synchronization time adjustment may be used to measure the delay of the signal transmitted through the target beam and transmitted through the original beam.
  • the UE can perform time synchronization after beam switching according to the synchronization time adjustment amount, and the implementation manner is simple and the system overhead is small.
  • the beam switching may be downlink beam switching.
  • the target beam is the target downlink beam
  • the original beam is the original downlink beam.
  • the control signaling is used to indicate that the UE receives the received beam from the original downlink beam.
  • the corresponding receiving beam is switched to the receiving beam corresponding to the target downlink beam.
  • the control signaling is referred to as the first control signaling.
  • the beam switching may be uplink beam switching, corresponding to The target beam is the target uplink beam, and the original beam is the original uplink beam.
  • the control signaling is used to instruct the UE to switch the transmission beam from the original uplink beam to the target uplink beam. Signaling.
  • the synchronization time adjustment amount may have multiple implementation manners, so that the synchronization method may have multiple implementation manners.
  • Some implementation manners of the synchronization method are introduced below.
  • FIG. 5 is a schematic flowchart of the downlink synchronization method 1, and the method includes the following steps:
  • Step 21 The UE performs downlink beam measurement, and obtains a link quality parameter of a transmission path of each pair of downlink beams and a TBL of each downlink beam.
  • the link quality parameters include, but are not limited to, reference signal receiving power (RSRP), reference signal receiving quality (RSRQ), and the like.
  • RSRP reference signal receiving power
  • RSRQ reference signal receiving quality
  • Step 22 The UE reports a downlink beam measurement report to the base station, where the measurement report includes a link quality parameter corresponding to at least two downlink beams and a TBL.
  • the selection of the at least two downlink beams depends on the implementation of the UE.
  • the UE reports the measurement results (link quality parameters and TBL) of all downlink beams.
  • the UE reports the set number.
  • the measurement result of the downlink beam is better.
  • the UE reports the measurement result of the downlink beam whose link quality meets the set requirement.
  • Step 23 The base station receives the downlink beam measurement report, and stores a link quality parameter of the downlink beam and a TBL.
  • Step 24 The base station determines that downlink beam switching needs to be performed, and determines a target downlink beam to be switched to.
  • Step 25 The base station reads the TBL of the original downlink beam before the handover and the TBL of the target downlink beam after the handover, and calculates a difference between the TBL of the target downlink beam and the TBL of the original downlink beam, where the difference is the synchronization time adjustment amount;
  • Step 26 The base station sends first control signaling to the UE, where the first control signaling includes an indication parameter indicating the target downlink beam and a difference between the TBL of the original downlink beam and the TBL of the target downlink beam.
  • Step 27 The UE responds to the first control signaling, and switches the receiving beam from the receiving beam corresponding to the original downlink beam to the receiving beam corresponding to the target downlink beam, and moves the downlink according to the difference between the TBL of the target downlink beam and the TBL of the original downlink beam.
  • Timing synchronization boundary when the difference between the TBL of the target downlink beam and the TBL of the original downlink beam is a positive number, the downlink timing synchronization boundary is delayed by the synchronization time adjustment amount; the difference between the TBL of the target downlink beam and the TBL of the original downlink beam is a negative number At the time, the downlink timing synchronization boundary is advanced by the absolute value of the synchronization time adjustment amount.
  • the downlink timing synchronization boundary may be a symbol timing boundary, or may be a frame timing boundary, or other timing boundary in the prior art.
  • the synchronization implementation after the downlink beam switching is simple and the efficiency is high.
  • the UE can adjust the synchronization time according to the TBL difference of the beam before and after the handover, it is not necessary to use the CP to achieve synchronization between the beams, so the length of the CP can be shorter, thereby improving the utilization efficiency of the system spectrum.
  • the basic procedure of the downlink synchronization method 2 is the same as that of the downlink synchronization method 1.
  • the improvement is that the UE downlink measurement report carries the TBL of the beam group in step 22, and in step 25, the base station determines the TBL and the original downlink of the beam group where the target downlink beam is located.
  • the difference between the TBL of the beam group in which the beam is located, and the first control signaling in step 26 carries the difference between the TBL of the beam group in which the target downlink beam is located and the TBL of the beam group in which the original downlink beam is located.
  • the UE according to the difference The difference in the TBL of the beam set moves the downlink timing synchronization boundary.
  • the UE when the beam group includes multiple downlink beams, the UE reports the TBL of the beam group, and may not report the TBL of each beam in the beam group, thereby reducing the amount of reported data and reducing the reported downlink beam measurement report. s expenses.
  • FIG. 6 is a schematic flowchart of the downlink synchronization method 3, where the method includes the following steps:
  • Step 31 The UE performs downlink beam measurement, and obtains a link quality parameter of a transmission path of each pair of downlink beams and a TBL of each downlink beam.
  • Step 32 The UE reports a downlink beam measurement report to the base station, where the measurement report includes link quality parameters corresponding to at least two downlink beams.
  • the UE saves the TBL of the measured downlink beam, but may not report the TBL of the downlink beam to the base station.
  • Step 33 The base station receives the downlink beam measurement report.
  • Step 34 The base station determines that downlink beam switching needs to be performed, and determines a target downlink beam to be switched to.
  • Step 35 The base station sends first control signaling to the UE, where the first control signaling includes an indication parameter indicating the target downlink beam.
  • Step 36 The UE responds to the first control signaling, and the receiving beam is switched from the receiving beam corresponding to the original downlink beam to the receiving beam corresponding to the target downlink beam, and the TBL of the target downlink beam and the TBL of the original downlink beam are read, according to the target downlink.
  • the difference between the TBL of the beam and the TBL of the original downlink beam moves the downlink timing synchronization boundary, which is the synchronization time adjustment amount.
  • step 36 the UE reads the TBL of the beam group where the target downlink beam is located and the TBL of the beam group where the original downlink beam is located, according to the TBL and the original downlink of the beam group where the target downlink beam is located.
  • the difference in the TBL of the beam group in which the beam is located moves the downlink timing synchronization boundary.
  • the TBL of the target downlink beam and the TBL of the original downlink beam may be used to read the TBL measurement value of the downlink beam when the downlink beam is trained, or may be after the first beam switching instruction is received.
  • the measured value obtained by measuring the original downlink beam and the TBL of the target downlink beam can improve the accuracy of the synchronization time adjustment amount.
  • the UE may not report the TBL of the beam/beam group to the base station, and the amount of reported data may be reduced, and the overhead of reporting the downlink beam measurement report may be reduced.
  • FIG. 7 is a schematic flowchart of the downlink synchronization method 4, where the method includes the following steps:
  • Step 41 The base station performs uplink beam measurement, and obtains a link quality parameter of a transmission path of a beam pair in which each uplink beam is located, and a TBL of each uplink beam.
  • a link quality parameter of a transmission path of a beam pair in which each uplink beam is located and a TBL of each uplink beam.
  • Step 42 The base station determines that downlink beam switching needs to be performed, and determines a target downlink beam to be switched to.
  • Step 43 The base station reads the TBL of the uplink beam that has beam correspondence with the target downlink beam, and the TBL of the uplink beam that has beam correspondence with the original downlink beam, and calculates a difference ⁇ TBL between the two, and the ⁇ TBL is the synchronization time adjustment amount. .
  • Step 44 The base station sends first control signaling to the UE, where the first control signaling includes an indication parameter indicating a target downlink beam and a ⁇ TBL, where the ⁇ TBL is a synchronization time adjustment amount.
  • Step 45 The UE responds to the first control signaling, and switches the receiving beam from the receiving beam corresponding to the original downlink beam to the receiving beam corresponding to the target downlink beam, and moves the downlink timing synchronization boundary according to ⁇ TBL.
  • step 43 the base station reads the TBL of the beam group of the uplink beam that has the beam correspondence with the target downlink beam, and the TBL of the beam group of the uplink beam that has the beam correspondence with the original downlink beam.
  • the difference between the two beam groups is calculated.
  • the first control signaling in step 44 includes the difference of the TBL of the beam group.
  • step 45 the UE moves the downlink timing synchronization boundary according to the difference of the beam group.
  • the base station can use the TBL of the uplink beam as the TBL of the downlink beam based on the beam correspondence. Therefore, the UE can report the TBL of the beam/beam group to the base station, and can reduce the amount of reported data and reduce the reported downlink beam. The cost of the measurement report.
  • FIG. 8 is a schematic flowchart of the uplink synchronization method 1, where the method includes the following steps:
  • Step 51 The base station performs uplink beam measurement, and obtains a link quality parameter of a transmission path of a beam pair in which each uplink beam is located, and a TBL of each uplink beam.
  • Step 52 The base station determines that uplink beam switching needs to be performed, and determines a target uplink beam to be switched to.
  • Step 53 The base station reads the TBL of the target uplink beam and the TBL of the original uplink beam, and calculates a difference between the TBL of the target uplink beam and the TBL of the original uplink beam, where the difference is the synchronization time adjustment amount.
  • Step 54 The base station sends a second control signaling to the UE, where the second control signaling includes an indication parameter indicating the target uplink beam and a difference between the TBL of the target uplink beam and the TBL of the original uplink beam.
  • Step 55 The UE responds to the second control signaling, and switches the transmit beam from the original uplink beam to the target uplink beam, and moves the uplink timing synchronization boundary according to the difference between the TBL of the target uplink beam and the TBL of the original uplink beam.
  • the uplink timing synchronization boundary is advanced by the synchronization time adjustment amount; the difference between the TBL of the target uplink beam and the TBL of the original uplink beam is a negative number.
  • the uplink timing synchronization boundary may be a symbol timing boundary, or may be a frame timing boundary, or other timing boundary in the prior art.
  • the base station calculates the difference between the TBL of the beam group in which the target uplink beam is located and the TBL of the beam group in which the original uplink beam is located.
  • the second control signaling includes the beam group. The difference, in step 45, the UE moves the uplink timing synchronization boundary according to the difference of the beam group.
  • the TBL of the target uplink beam and the TBL of the original uplink beam may be used to read the TBL measurement value of the uplink beam when the uplink beam is trained, or may be determined after the handover to the target uplink beam is determined.
  • the measured value obtained by measuring the original uplink beam and the TBL of the target uplink beam can improve the accuracy of the synchronization time adjustment amount.
  • the base station can calculate the adjustment amount of the line timing synchronization boundary (for example, the difference between the TBL of the target uplink beam and the TBL of the original uplink beam) when the uplink beam is switched, and instruct the UE to adjust the uplink synchronization according to the adjustment amount. Time, avoiding the complicated random access synchronization process, with low system overhead and high efficiency.
  • the adjustment amount of the line timing synchronization boundary for example, the difference between the TBL of the target uplink beam and the TBL of the original uplink beam
  • FIG. 9 is a schematic flowchart of the uplink synchronization method 2, where the method includes the following steps:
  • Step 61 The UE performs downlink beam measurement, and obtains a link quality parameter of a transmission path of a beam pair in which each downlink beam is located and a TBL of each downlink beam.
  • Step 62 The UE reports a downlink beam measurement report to the base station, where the measurement report includes a link quality parameter corresponding to at least two downlink beams and a TBL.
  • Step 63 The base station receives the downlink beam measurement report.
  • Step 64 The base station determines that uplink beam switching needs to be performed, and determines a target uplink beam to be switched to.
  • Step 65 The base station reads the TBL of the downlink beam that has beam correspondence with the target uplink beam, and the TBL of the downlink beam that has beam correspondence with the original uplink beam, and calculates a difference ⁇ TBL′ between the two, and the ⁇ TBL′ is the synchronization time. Adjustment amount.
  • Step 66 The base station sends second control signaling to the UE, where the second control signaling includes an indication parameter of the target uplink beam and ⁇ TBL'.
  • Step 67 The UE responds to the second control signaling, and switches the transmit beam from the original uplink beam to the target uplink beam, and moves the uplink timing synchronization boundary according to ⁇ TBL'.
  • the UE reports the TBL of the downlink beam group to the base station, and may not report the TBL of the downlink beam in the downlink beam group.
  • the base station reads the beam corresponding to the target uplink beam.
  • the TBL of the beam group in which the downlink beam is located, the TBL of the beam group in which the downlink beam is beam-corresponding to the original uplink beam, and the difference between the two beam groups is calculated.
  • the second control signaling carries the difference of the beam group.
  • the UE moves the uplink timing synchronization boundary according to the difference of the beam group.
  • the base station can calculate the adjustment amount of the line timing synchronization boundary when the uplink beam is switched, and instruct the UE to adjust the uplink synchronization time according to the adjustment amount, thereby avoiding a complicated random access synchronization process, and the system overhead is small and the efficiency is relatively low. high.
  • the terminal may not perform downlink beam measurement, or the base station may not instruct the terminal to perform downlink beam measurement, or the base station may not receive the downlink beam of the terminal. measurement report.
  • the base station can directly determine related information of the downlink beam, such as beam link quality (RSRP, RSRQ), beam link delay TBL, etc., based on the beam correspondence between the uplink beam and the downlink beam, to reduce the system. LF.
  • RSRP beam link quality
  • RSRQ beam link delay
  • the base station may not perform uplink beam measurement, and may directly perform downlink based on beam correspondence between the uplink beam and the downlink beam.
  • the beam measurement results determine related information of the uplink beam, such as beam link quality (RSRP, RSRQ), beam link delay TBL, etc., to reduce system resource consumption.
  • RSRP beam link quality
  • RSRQ beam link delay
  • FIG. 10 is a reporting method according to an embodiment of the present invention.
  • the method includes:
  • Step 71 The UE performs downlink beam measurement to obtain a TBL of each downlink beam.
  • Step 72 The UE reports a downlink beam measurement report to the base station, where the downlink beam measurement report includes a TBL of at least two downlink beams, or the downlink beam measurement report includes a TBL of at least one downlink beam group.
  • the UE when performing the downlink beam measurement, may also measure the link quality parameter of the transmission path of the beam pair in which each downlink beam is located, and the downlink beam measurement report may also include the link quality parameter corresponding to the downlink beam.
  • the UE can measure the TBL of each downlink beam in the downlink beam measurement, and report the TBL of the downlink beam to the base station, so that the base station can learn the relative delay of the signal transmission through different downlink beams, so that the base station can communicate with the UE. Manage.
  • FIG. 11 is a schematic diagram of a terminal device according to an embodiment of the present invention.
  • the terminal device may be used to implement the function of the UE in any corresponding synchronization method in FIG. 4 to FIG.
  • the terminal device includes:
  • the receiving module 81 is configured to receive control signaling sent by the network device, where the control signaling includes an indication parameter indicating a target beam after the beam switching;
  • the switching module 82 is configured to perform beam switching according to the indication parameter in response to the control signaling, and adjust a synchronization time according to the synchronization time adjustment amount.
  • the original beam is an original downlink beam
  • the target beam is a target downlink beam
  • the control signaling is used to indicate that the terminal device switches a receiving beam from a receiving beam corresponding to the original downlink beam to a The receiving beam corresponding to the target downlink beam.
  • control signaling further includes the synchronization time adjustment quantity, where the synchronization time adjustment quantity is a difference between a beam link delay TBL of the target downlink beam and a TBL of the original downlink beam, where The TBL of a beam is the difference between the time-consuming and the reference duration of the transmission of the signal through the transmission path of the beam pair in which the beam is located, the beam pair comprising a transmit beam and its corresponding receive beam;
  • the terminal device further includes:
  • the measuring module 83 is configured to: before the receiving module receives the control signaling, perform downlink beam measurement, obtain a link quality parameter of a transmission path of a beam pair where each downlink beam is located, and a TBL of each downlink beam;
  • the sending module 84 is configured to report, to the network device, the link quality parameter and the TBL corresponding to the at least two downlink beams, where the at least two downlink beams include the original downlink beam and the target downlink beam.
  • control signaling further includes the synchronization time adjustment quantity, where the synchronization time adjustment quantity is a difference between a TBL of a beam group where the target downlink beam is located and a TBL of a beam group where the original downlink beam is located.
  • any beam group includes at least one beam, and when the number of beams in the beam group is greater than 1, the difference between the TBLs of any two beams in the beam group is less than a set threshold, and the TBL of the beam group is The value in the range of the minimum TBL to the maximum TBL of the TBL of all beams in the beam group, and the TBL of any beam is the difference between the time consuming and the reference duration of the transmission of the signal through the transmission path of the beam pair in which the beam is located,
  • the beam pair includes a transmit beam and its corresponding receive beam;
  • the terminal device further includes:
  • the measuring module 83 is configured to: before the receiving module receives the control signaling, perform downlink beam measurement, obtain a link quality parameter of a transmission path of a beam pair where each downlink beam is located, and a TBL of each downlink beam;
  • a sending module 84 configured to report, to the network device, a beam parameter of at least one downlink beam group, where a beam parameter of any downlink beam group includes the link quality parameter corresponding to each downlink beam in the downlink beam group
  • the synchronization time adjustment quantity is a difference between a TBL of the target downlink beam and a TBL of the original downlink beam, and a TBL of any beam is a signal transmitted by a transmission path of a beam pair where the beam is located.
  • the terminal device further includes:
  • the measuring module 83 is configured to measure the TBL of each downlink beam before the switching module adjusts the synchronization time according to the synchronization time adjustment amount;
  • the switching module 82 is further configured to: read a TBL of the target downlink beam and a TBL of the original downlink beam, and determine the synchronization time adjustment amount.
  • the target beam is a target uplink beam
  • the original beam is an original uplink beam
  • the control signaling is used to indicate that the terminal device switches a transmit beam from the original uplink beam to the target uplink beam.
  • the control signaling further includes the synchronization time adjustment amount.
  • the synchronization time adjustment quantity is a difference between a TBL of the target uplink beam and a TBL of the original uplink beam, and a TBL of any beam is a signal transmitted by a transmission path of a beam pair where the beam is located.
  • the target beam is a target uplink beam
  • the original beam is an original uplink beam
  • the control signaling is used to indicate that the terminal device switches a transmit beam from the original uplink beam to the target uplink beam.
  • the synchronization time adjustment amount is a difference between a TBL of a downlink beam having a beam correspondence with the target uplink beam and a TBL of a downlink beam having a beam correspondence with the original uplink beam, and a TBL of any beam is a signal The difference between the time-consuming and the reference duration of the transmission path of the beam pair in which the beam is located, the beam pair comprising a transmit beam and its corresponding receive beam;
  • the terminal device further includes:
  • the measuring module 83 is configured to measure the TBL of each downlink beam before the switching module adjusts the synchronization time according to the synchronization time adjustment amount;
  • the switching module 82 is further configured to: read a TBL of a downlink beam that has beam correspondence with the target uplink beam, and a TBL of a downlink beam that has beam correspondence with the original uplink beam, and determine the synchronization time adjustment amount. .
  • each functional module in each embodiment of the present application may be integrated into one processing. In the device, it can also be physically existed alone, or two or more modules can be integrated into one module.
  • the above integrated modules can be implemented in the form of hardware or in the form of software functional modules.
  • the terminal device can include the processor 801.
  • the hardware of the entity corresponding to the switching module and the measurement module may be the processor 801.
  • the processor 801 can be a central processing unit (CPU), or a digital processing module or the like.
  • the terminal device may further include a transceiver 803, and the processor 801 receives the control signaling sent by the base station through the transceiver 803, and sends the downlink measurement beam report to the base station.
  • the terminal device further includes a memory 802 for storing a program executed by the processor 801.
  • the memory 802 may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), or a volatile memory such as a random access memory (random). -access memory, RAM).
  • Memory 802 is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto.
  • each module of the foregoing terminal device may refer to the implementation manner of each step performed by the UE in the synchronization method described in FIG. 4 to FIG. 9.
  • FIG. 13 is a schematic diagram of a network device according to an embodiment of the present invention.
  • the terminal device can be used to implement the function of a base station in any corresponding synchronization method in FIG. 4 to FIG.
  • the network device includes:
  • a determining module 91 configured to determine a target beam of the beam switching and a synchronization time adjustment amount
  • the sending module 92 is configured to send control signaling to the terminal device, where the control signaling includes an indication parameter indicating the target beam and the synchronization time adjustment amount, where the control signaling is used to indicate that the terminal device is configured according to the The indication parameter performs beam switching, and the synchronization time is adjusted according to the synchronization time adjustment amount.
  • the original beam is an original downlink beam
  • the target beam is a target downlink beam
  • the control signaling is used to indicate that the terminal device switches a receiving beam from a receiving beam corresponding to the original downlink beam to a The receiving beam corresponding to the target downlink beam.
  • the synchronization time adjustment quantity is a difference between a TBL of the target downlink beam and a TBL of the original downlink beam, and a TBL of any beam is a signal transmitted by a transmission path of a beam pair where the beam is located.
  • the network device further includes:
  • the receiving module 93 is configured to receive, before the determining module determines the synchronization time adjustment quantity, a link quality parameter and a TBL of a transmission path of a beam pair in which the at least two downlink beams are reported by the terminal device, where the at least The two downlink beams include the original downlink beam and the target downlink beam.
  • the synchronization time adjustment quantity is a difference between a TBL of a beam group in which the target downlink beam is located and a TBL of a beam group in which the original downlink beam is located, and any beam group includes at least one beam, and is in a beam.
  • the number of beams in the group is greater than 1, the difference between the TBLs of any two beams in the beam group is less than a set threshold, and the TBL of the beam group is the minimum TBL to the maximum TBL of the TBLs of all beams in the beam group.
  • the value in the range, the TBL of any beam is the difference between the time-consuming and the reference duration of the transmission of the signal through the transmission path of the beam pair in which the beam is located, the beam pair comprising a transmit beam and its corresponding receive beam;
  • the network device further includes:
  • the receiving module 93 is configured to receive, before the determining module determines the synchronization time adjustment quantity, a beam parameter of the at least one downlink beam group reported by the terminal device, where a beam parameter of any downlink beam group includes the downlink beam group
  • the link quality parameter corresponding to each downlink beam and the TBL of the downlink beam group, the at least one downlink beam group includes a beam group in which the original downlink beam is located and a beam group in which the target downlink beam is located.
  • the synchronization time adjustment quantity is: a difference between a TBL of an uplink beam having a beam correspondence with the target downlink beam and a TBL of an uplink beam having a beam correspondence with the original downlink beam, any beam
  • the TBL is the difference between the time-consuming and the reference duration of the transmission of the signal through the transmission path of the beam pair in which the beam is located, the beam pair comprising a transmit beam and its corresponding receive beam;
  • the network device further includes:
  • the measuring module 94 is configured to measure a TBL of each uplink beam before the determining module determines the synchronization time adjustment amount;
  • the determining module 91 is further configured to: read a TBL of an uplink beam that has beam correspondence with the target downlink beam, and a TBL of an uplink beam that has beam correspondence with the original downlink beam.
  • the target beam is a target uplink beam
  • the original beam is an original uplink beam
  • the control signaling is used to indicate that the terminal device switches a transmit beam from the original uplink beam to the target uplink beam.
  • the synchronization time adjustment amount is a difference between a TBL of the target uplink beam and a TBL of the original uplink beam, and a TBL of any beam is a time consuming time for a signal to be transmitted through a transmission path of a beam pair in which the beam is located.
  • the network device further includes:
  • the measuring module 94 is configured to measure a TBL of each uplink beam before the determining module determines the synchronization time adjustment amount;
  • the determining module 91 is further configured to: read a TBL of the target uplink beam and a TBL of the original uplink beam.
  • each functional module in each embodiment of the present application may be integrated into one processing. In the device, it can also be physically existed alone, or two or more modules can be integrated into one module.
  • the above integrated modules can be implemented in the form of hardware or in the form of software functional modules.
  • the network device may include a processor.
  • the hardware of the entity corresponding to the determining module and the measuring module may be a processor.
  • the network device may further include a transceiver, the processor receiving the downlink beam measurement report by the transceiver receiving terminal device and transmitting the control signaling to the terminal device.
  • the network device also includes a memory for storing a program executed by the processor.
  • each module of the foregoing network device may refer to the implementation manner of each step performed by the base station in the synchronization method described in FIG. 4 to FIG. 9.
  • the embodiment of the invention further provides a terminal device, including:
  • a measurement module configured to perform downlink beam measurement, to obtain a TBL of each downlink beam, where the TBL of the beam is a difference between a time-consuming and a reference duration of the transmission of the signal through the transmission path of the beam pair where the beam is located, where the beam pair includes one Transmit beam and its corresponding receive beam;
  • a sending module configured to report a downlink beam measurement report to the network device, where the downlink beam measurement report includes a TBL of at least two downlink beams; or the downlink beam measurement report includes a TBL of at least one downlink beam group, and any downlink beam
  • the group includes at least one downlink beam, and when the number of beams in the downlink beam group is greater than 1, the difference between the TBLs of any two downlink beams in the downlink beam group is less than a set threshold, and the TBL of any downlink beam group is the The value in the range of the minimum TBL to the maximum TBL of the TBL of all downlink beams in the downlink beam group.
  • each module of the foregoing terminal device reference may be made to the implementation manner of each step performed by the UE in the reporting method described in FIG.
  • the embodiment of the present invention further provides a computer readable storage medium, where the readable storage medium stores computer instructions, when the instructions are executed on a computer, causing the computer to execute the method described in FIG. 4 to FIG. A step of.
  • the embodiment of the present invention further provides a computer readable storage medium, where the readable storage medium stores computer instructions, when the instructions are executed on a computer, causing the computer to execute the method described in FIG. 4 to FIG. A step of.
  • Embodiments of the present invention also provide a computer program product that, when run on a computer, causes the computer to perform the steps performed by the UE in the methods described in Figures 4-10.
  • Embodiments of the present invention also provide a computer program product that, when run on a computer, causes the computer to perform the steps performed by the base station in the methods described in Figures 4-10.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

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  • Computer Networks & Wireless Communication (AREA)
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  • Electromagnetism (AREA)
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Abstract

L'invention concerne un procédé de synchronisation, un procédé de soumission et un dispositif correspondant permettant de résoudre le problème des antériorités lié à des surdébits élevés occasionnés par un procédé de synchronisation mis en oeuvre lors d'une commutation de faisceaux. Dans le procédé selon l'invention : un appareil terminal reçoit une signalisation de commande transmise par un appareil de réseau, la signalisation de commande comprenant un paramètre d'indication indiquant un faisceau cible vers lequel effectuer la commutation; et, en réponse à la signalisation de commande, l'appareil terminal effectue une commutation de faisceaux selon le paramètre d'indication et règle le temps de synchronisation selon une quantité de réglage de temps de synchronisation.
PCT/CN2018/099955 2017-08-11 2018-08-10 Procédé de synchronisation, procédé de soumission et dispositif correspondant WO2019029700A1 (fr)

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