WO2021063198A1 - Procédé de mesure d'écart de synchronisation de trame et de numéro de trame système (sftd) - Google Patents

Procédé de mesure d'écart de synchronisation de trame et de numéro de trame système (sftd) Download PDF

Info

Publication number
WO2021063198A1
WO2021063198A1 PCT/CN2020/116367 CN2020116367W WO2021063198A1 WO 2021063198 A1 WO2021063198 A1 WO 2021063198A1 CN 2020116367 W CN2020116367 W CN 2020116367W WO 2021063198 A1 WO2021063198 A1 WO 2021063198A1
Authority
WO
WIPO (PCT)
Prior art keywords
terminal device
rrc
sftd
cell
rrc connection
Prior art date
Application number
PCT/CN2020/116367
Other languages
English (en)
Chinese (zh)
Inventor
金乐
邝奕如
王洲
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2021063198A1 publication Critical patent/WO2021063198A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
    • H04W56/0045—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by altering transmission time

Definitions

  • This application relates to the field of wireless communication technology, and in particular to a SFTD measurement method.
  • the terminal obtains the continuous service of the wireless network by reselecting and switching between cells with different coverage areas.
  • RRC Radio Resource Control
  • the terminal can be in the idle RRC_IDLE state, the inactive RRC_INACTIVE state or the connected RRC_CONNECTED state.
  • RRC_IDLE state and RRC_INACTIVE state there is no RRC link between the terminal and the base station.
  • the terminal When the serving cell where the terminal resides satisfies a predetermined condition, for example, when the signal of the serving cell is lower than a certain threshold, the terminal measures the serving cell according to the same frequency, different frequency and/or different system neighboring cell information configured by the base station in the system message And the signal quality of the neighboring cells to determine whether the signal quality meets the reselection conditions. If it is satisfied, reselect the neighboring cell and stay in the neighboring cell. In the RRC_CONNECTED state, there is an RRC connection between the terminal and the base station, and the base station configures the terminal to perform intra-frequency, inter-frequency and/or inter-system neighbor cell measurement through RRC signaling.
  • the terminal reports the measurement results of the serving cell and neighboring cells to the base station through RRC signaling, and the base station switches the terminal to a cell with better signal quality according to the measurement results. Therefore, whether it is the cell reselection in the RRC_IDLE state or the RRC_INACTIVE state, or the cell handover in the RRC_CONNECTED state, it is based on the measurement results of the serving cell and neighboring cells.
  • the embodiments of the present application provide an SFTD measurement method, terminal equipment, chip system, network system, readable storage medium, and computer storage product, which are used to improve the measurement capability of the terminal equipment and can accurately measure the current resident cell and Neighborhood SFTD.
  • an embodiment of the present application provides a method for measuring a system frame number and frame timing deviation (SFTD).
  • the method is applicable to a terminal device and includes: the terminal device receives first information, and the first information includes The first frequency point list, and the physical cell identity (PCI) list contained in each frequency point; when the terminal device is in the idle state (RRC_IDLE) or inactive state (RRC_INACTIVE), the terminal device according to the first Information performs SFTD measurement; when the terminal device is in a connected state (RRC_CONNECTED), the terminal device sends the SFTD measurement report. So as to realize the SFTD measurement in the unconnected state.
  • the terminal device receives first information, and the first information includes The first frequency point list, and the physical cell identity (PCI) list contained in each frequency point; when the terminal device is in the idle state (RRC_IDLE) or inactive state (RRC_INACTIVE), the terminal device according to the first Information performs SFTD measurement; when the terminal device is in a connected state (
  • the first information includes at least one of SIB, SIB2, SIB3, SIB4, SIB5, and SIB24.
  • the terminal device sending the SFTD measurement report includes: the terminal device sending an RRC connection establishment complete message (RRC Connection Complete) to the network side, and the message includes the SFTD measurement report.
  • RRC Connection Complete RRC Connection Establish
  • the first information includes at least one or more of the following: a first cell maxSFTDIdleMeasCarriers, used to indicate the maximum number of frequency points in the first frequency point list; a second cell carrierFreq, used To indicate the frequency point number of the first frequency point; the third cell measCellList-r15 is used to indicate the PCI list of the cell on each frequency point.
  • the method before the terminal device is in a connected state (RRC_CONNECTED), the method includes: the terminal device initiates an RRC Connection Request message.
  • the RRC Connection Complete message includes at least one or more of the following: a fourth information element SFTDMeasResultIdle, the fourth information element is used to indicate the SFTD between the camping cell and the target cell Measurement result; the fifth information element SFTDMeasResultListIdle, the fifth information element is used to indicate the SFTD measurement report; the sixth information element physCellId, the sixth information element is used to indicate the PCI list of the target cell; the first Seven information elements are used to indicate the SFTD measurement report; the seventh information element sfn-OffsetResult-r15, the seventh information element is used to indicate the SFN offset between the camping cell and the target cell; the eighth information element frameBoundaryOffsetResult -r15, the eighth cell is used to indicate the timing deviation between the frame boundary of the camping cell and the target cell, where the target cell is a neighboring cell where the terminal device needs to perform SFTD.
  • a fourth information element SFTDMeasResultIdle the fourth information element is used to
  • the method before the terminal device is in a connected state (RRC_CONNECTED), the method includes: the terminal device initiates sending an RRC Connection Resume Request message.
  • the terminal device sending the SFTD measurement report includes: the terminal device sending an RRC connection establishment complete message (RRC Connection Resume Complete) to the network side, the message including the SFTD measurement report .
  • RRC Connection Establish Complete RRC Connection Resume Complete
  • the terminal device sending the SFTD measurement report includes: the terminal device sending an RRC Connection Complete message (RRC Connection Complete) to the network side, and the message includes the ninth cell SFTDIdleMeasAvailable, The first information element instructs the terminal device to obtain the SFTD measurement report.
  • RRC Connection Complete RRC Connection Complete
  • the first information element instructs the terminal device to obtain the SFTD measurement report.
  • the terminal device receives a first request, and the first request is used to instruct the terminal to report the SFTD measurement report.
  • the terminal device in response to the first request, sends a first response, and the first response includes the SFTD measurement report.
  • the terminal device sending the SFTD measurement report includes: the terminal device sending an RRC connection establishment resume message (RRC Connection Resume Complete) to the network side, and the RRC Connection Resume Complete includes the first message.
  • the first information element instructs the terminal device to obtain the SFTD measurement report.
  • the terminal device receives a first request, and the first request is used to instruct the terminal to report the SFTD measurement report.
  • the terminal device in response to the first request, sends a first response, and the first response includes the SFTD measurement report.
  • the first information is an RRC Connection Reconfiguration reconfiguration message
  • the reconfiguration message summary includes a list of target frequency points, and each target frequency point optionally includes information about the target cell on the frequency point. PCI list.
  • the method before the terminal device is in the connected state (RRC_CONNECTED), the method includes: the terminal device sends an RRC Connection Request message; the terminal device receives an RRC Connection Setup message.
  • the terminal device sends an RRC Connection Setup Complete message, and the message includes the SFTD measurement report.
  • the method before the terminal device is in the connected state (RRC_CONNECTED), the method includes: the terminal device initiates sending an RRC Connection Resume Request message; the terminal device sends an RRC Connection Resume message.
  • the terminal device sends an RRC Connection Resume Complete message, and the message includes the SFTD measurement report.
  • an embodiment of the present application also provides a chip, including: a memory storing instructions;
  • the processor and the interface are used to receive and transmit code instructions to the processor, and the processor is used to run the code instructions in the above-mentioned method.
  • an embodiment of the present application also provides an electronic device, an electronic device including: one or more processors; a memory; and multiple application programs;
  • the embodiments of the present application also provide a method, the method includes: the terminal device receives first information sent by the network side, the first information indicating that the terminal base station supports the RRC_IDLE/RRC_INACTIVE state SFTD measurement capability; when the RRC After the connection is established, the network side sends a UE Capability Enquiry to query the terminal device's capabilities; the terminal device returns the UE Capability Information to the network side, which contains a field indicating that the terminal device supports RRC_IDLE/RRC_INACTIVE state SFTD measurement; when the RRC connection is released, the terminal device sends RRC connection release to the network side, the RRC connection release message carries a list of target frequency points measured by SFTD in the RRC_IDLE/RRC_INACTIVE state, and each target frequency point optionally includes a PCI list of the target cell on the frequency point.
  • the terminal device When the terminal device is in the RRC_IDLE/RRC_INACTIVE state, the SFTD measurement is performed.
  • the terminal device When the terminal device completes the RRC connection, the terminal device can send an RRC Connection Setup Complete message to the network side, and the RRC Connection Setup Complete message indicates that the base station terminal has obtained the SFTD measurement result; in response to the UE Information Request message sent by the network side, the information indicates The terminal reports the SFTD measurement result, and the terminal device sends the UE Information Response to the network side, and the information carries the SFTD information measured before the RRC connection.
  • an embodiment of the present application also provides an electronic device, an electronic device including: one or more processors; a memory; and multiple application programs;
  • an embodiment of the present application also provides a chip, including: a memory storing instructions;
  • the processor and the interface are used to receive and transmit code instructions to the processor, and the processor is used to run the code instructions in the above-mentioned method.
  • the embodiments of the present application also provide a method, the method includes: the terminal device receives first information sent by the network side, the first information indicating that the terminal base station supports the RRC_IDLE/RRC_INACTIVE state SFTD measurement capability; when the RRC After the connection is established, the network side sends a UE Capability Enquiry to query the terminal device's capabilities; the terminal device returns the UE Capability Information to the network side, which contains a field indicating that the terminal device supports RRC_IDLE/RRC_INACTIVE state SFTD measurement; when the RRC connection is released, the terminal device sends RRC connection release to the network side, the RRC connection release message carries a list of target frequency points measured by SFTD in the RRC_IDLE/RRC_INACTIVE state, and each target frequency point optionally includes a PCI list of the target cell on the frequency point.
  • the terminal device When the terminal device is in the RRC_IDLE/RRC_INACTIVE state, the SFTD measurement is performed.
  • the terminal device When the terminal device is in an RRC connection, the terminal device can send an RRC Connection Resume Complete message to the network side, and indicate in the RRC signaling RRCConnectionResumeComplete that the base station terminal has obtained the SFTD measurement result.
  • the network side After the RRC connection is established, the network side can initiate a UE to the terminal device.
  • Information Request information instructs the terminal to report the SFTD measurement result, and in response to the UE Information Request message sent by the network side, the information instructs the terminal to report the SFTD measurement result, and the terminal device sends the UE Information Response to the network side.
  • the information carries the information contained in the RRC SFTD information measured before connection.
  • an embodiment of the present application also provides an electronic device, an electronic device including: one or more processors; a memory; and multiple application programs;
  • an embodiment of the present application also provides a chip, including: a memory storing instructions;
  • the processor and the interface are used to receive and transmit code instructions to the processor, and the processor is used to run the code instructions in the above-mentioned method.
  • an embodiment of the present invention provides a readable storage medium for storing computer software instructions for realizing the foregoing implementation manner.
  • an embodiment of the present invention provides a readable storage medium for storing computer software instructions for realizing the foregoing implementation manner.
  • Fig. 1 is a schematic diagram of a first system provided according to an embodiment of the present application.
  • Fig. 2 is a schematic diagram of a first measurement gap provided according to an embodiment of the present application.
  • Fig. 3 is a schematic diagram of a second measurement gap provided according to an embodiment of the present application.
  • Fig. 4 is a schematic diagram of a second system provided according to an embodiment of the present application.
  • Fig. 5 is a schematic diagram of a first SFTD measurement provided according to an embodiment of the present application.
  • Fig. 6 is a schematic diagram of a second SFTD measurement provided according to an embodiment of the present application.
  • Fig. 7 is a schematic diagram of a third SFTD measurement provided according to an embodiment of the present application.
  • Fig. 8 is a schematic diagram of a fourth SFTD measurement provided according to an embodiment of the present application.
  • Fig. 9 is a schematic diagram of a fifth SFTD measurement provided according to an embodiment of the present application.
  • Fig. 10 is a schematic diagram of a sixth SFTD measurement provided according to an embodiment of the present application.
  • Fig. 11 is a schematic diagram of a seventh SFTD measurement provided according to an embodiment of the present application.
  • Fig. 12 is a schematic diagram of an eighth SFTD measurement provided according to an embodiment of the present application.
  • Fig. 13 is a schematic diagram of a ninth SFTD measurement provided according to an embodiment of the present application.
  • Fig. 14 is a schematic diagram of a tenth SFTD measurement provided according to an embodiment of the present application.
  • Fig. 15 is a schematic diagram of an eleventh SFTD measurement provided according to an embodiment of the present application.
  • FIG. 16 is a schematic diagram of a chip system provided by an embodiment of the present application.
  • FIG. 1 a schematic diagram of a typical terminal reselection or handover in different cells is provided.
  • the current terminal equipment is camped on cell 1
  • the base station can send instructions to measure neighboring cells, such as measuring cells 2 or 3. Further, the base station performs cell measurement according to the measurement report reported by the terminal. Switch and other operations.
  • a measurement that requires a gap (measurement gap) or a measurement that does not require a gap can be used.
  • the terminal has multiple sets of radio frequency channels that can support receiving signals on different frequencies/different system neighboring cells at the same time when transmitting and receiving signals on the serving cell, the terminal supports the measurement method that does not require gap; otherwise, it needs to adopt the measurement method that requires gap.
  • stop the signal transmission and reception on the serving cell adjust the radio frequency channel to the different frequency/different system frequency point, and receive the inter-frequency/different system neighboring cell signal.
  • the measurement gap is configured by the base station. In the gap, the base station does not schedule the downlink reception and uplink transmission of the terminal on the serving cell, so uplink and downlink error codes are not caused in the gap.
  • MGRP Measurement Gap Repetition Period
  • MGL Measurement Gap Length
  • gap offset configures the measurement The starting position of the gap. According to these three parameters, it can be determined that the starting position of the measurement gap is on the SFN (System Frame Number) and subframe (subframe) that meet the following conditions:
  • subframe gap offset mod 10
  • the above SFN and subframe are the SFN and subframe of PCell (Primary Cell, primary cell).
  • the maximum MGL is 6ms.
  • Table 1 shows the two different types of gaps specified in the agreement, as shown in the table:
  • the length of Gap is 6ms, and the period is 40ms or 80ms, which is used to measure the network parameters of different frequency or different system cells.
  • the terminal device due to the existence of Gap, the terminal device cannot send and receive data of the serving cell at this time, that is, when the terminal device measures the network quality of the neighboring cell according to the Gap allocated by the network side, the terminal device usually cannot send and receive data of the serving cell.
  • the measurement of the neighboring cell of the New Radio (NR) can be based on the Synchronization Signal Block (SSB).
  • SSB Synchronization Signal Block
  • the base station needs to configure an accurate gap position to include the SSB of the neighboring cell.
  • the SSB of the NR cell is sent periodically, and the period can be 5ms, 10ms, 20ms, 40ms, 80ms, or 160ms. Multiple SSBs can be sent in one cycle, but all SSBs are sent in one 5ms to form an SSB burst.
  • the gap needs to include the SSB transmission time (the gap shown by the solid line in Figure 3), otherwise the terminal will not receive the SSB of the NR neighboring cell in the gap (the gap shown by the dotted line in Figure 3). The cell cannot be detected. This is different from LTE cell measurement.
  • the reference signal CRS Cell Reference Signal
  • LTE Long Term Evolution
  • the time domain position of the measurement gap refers to the timing of the PCell, while the time domain position of the neighboring cell SSB is sent at the timing of the neighboring cell.
  • the base station needs to know the timing deviation between the PCell and the NR neighboring cell. It is determined that the SFN and subframe number of the SSB of the NR neighboring cell correspond to the SFN and subframe number of the PCell. This can be achieved by measuring the terminal SFTD (SFN and frame timing difference, system frame number and frame timing deviation) to obtain the timing deviation of the two cells and reporting it to the base station.
  • SFTD measurement results include SFN deviation and frame boundary timing deviation.
  • the current protocol supports EN-DC (EUTRA-NR Dual Connectivity, EUTRA-NR dual connectivity) between LTE PCell and NR PSCell (primary cell of a secondary cell group, the primary cell of the secondary cell group), NE-DC (NR -EUTRA Dual Connectivity (NR-EUTRA dual connectivity) between NR PCell and LTE PSCell, NR-DC (NR Dual Connectivity, NR dual connectivity) between NR PCell and NR PSCell, and non-DC (Dual Connectivity, dual connectivity) ) Under LTE PCell and NR neighboring cell SFTD measurement, with the development of standard protocols, it may also support NR PCell and NR neighboring cells, NR PSCell and NR neighboring cells, and LTE DC under LTE PCell or SFTD measurement in various scenarios such as between LTE PSCell and NR neighboring cell.
  • EN-DC EUTRA-NR Dual Connectivity, EUTRA-NR dual connectivity
  • NE-DC NR -EUTRA Dual Connectivity
  • NR-DC NR Dual
  • the terminal When performing SFTD measurement, the terminal needs to receive a signal from another measured cell other than the PCell to obtain the timing information of the cell.
  • the terminal Under DC dual link, since the terminal can support simultaneous work on PCell and PSCell and know the timing information of PCell and PSCell at any time, there will be no difficulty in measuring SFTD between PCell and PSCell; PCell and NR neighboring cells under non-DC If the terminal's radio frequency path does not support receiving and sending signals on the PCell while receiving signals on the NR neighboring cell, there are certain difficulties in the SFTD measurement.
  • SFTD measurement that requires gap and CDRX (CONNECTED Discontinuous Reception, connected state discontinuous reception)
  • CDRX CONNECTED Discontinuous Reception, connected state discontinuous reception
  • SFTD measurement in the inactive period there is a possibility that the SSB of the NR neighboring cell cannot be measured.
  • DC Dual Connectivity
  • SFTD measurement between PCell or PSCell and NR neighboring cells also has the same problems.
  • Table 2 according to the difference of the cell currently camped on and the target cell that needs to be measured, the UE may have an SSB scenario where the NR cell cannot be measured during the measurement.
  • the camping scenario is LTE
  • the LTE cell of the cell where the current terminal device is camping when the network side or the terminal device needs to measure the neighboring cell (such as the NR cell), it needs to measure the LTE PCell cell and the NR neighboring cell.
  • the SSB where NR cannot be measured for example, in the EN-DC scenario, the primary cell currently camped on is the LTE cell and the secondary cell is the NR cell.
  • the network side or the terminal device needs to measure the neighboring cell
  • it is necessary to measure the SFTD parameters of the LTE PCell cell and the NR neighboring cell or need to measure the SFTD parameters of the NR PSCell cell and the NR neighboring cell there may also be scenarios where the SSB of the NR cannot be measured.
  • a system including but not limited to terminal equipment 1, terminal equipment 2, and cell 1, cell 2, and cell 3.
  • the other cell has a larger coverage area), such as the LTE cell and the NR cell in the NSA (Non-Standalone) network; and cell 1 and cell 3 have different coverage areas and overlap at the edge of the two cells.
  • NSA Non-Standalone
  • cell 1 and cell 3 have different coverage areas and overlap at the edge of the two cells.
  • two NR cells are adjacent to each other.
  • Terminal 1 can measure the SFTD between cell 1 and cell 2 in the coverage of cell 1 and cell 2;
  • Terminal 2 can measure the SFTD between cell 1 and cell 3 in the coverage of cell 1 and cell 3.
  • Step 501 In the RRC_CONNECTED state, for example, the UE enters the RRC_CONNECTED state through the RRC setup procedure in the RRC_IDLE state or the UE enters the RRC_CONNECTED state through the RRC recovery procedure in the RRC_INACTIVE state, and the base station configures the SFTD measurement through the signaling RRCConnectionReconfiguration.
  • the field reportSFTD-Meas in the cell reportSFTD is set to "true", and the measurement gap is configured in the cell measGapConfig.
  • Step 502 After receiving the signaling RRCConnection Reconfiguration, the terminal replies to the base station RRCConnection Reconfiguration Complete.
  • Step 503 The terminal detects the SSB of the target neighboring cell in a certain measurement gap, obtains the timing information of the target neighboring cell, and calculates the SFTD result between the LTE PCell and the target neighboring cell.
  • Step 504 The terminal reports the SFTD measurement result in the signaling MeasurementReport.
  • the base station After the base station receives the SFTD measurement result reported by the terminal, when the base station needs to initiate the measurement of the neighboring cell, the base station configures the position of the measurement gap according to the timing deviation, so that the measurement gap includes the SSB of the neighboring cell, so that The terminal will be able to receive the SSB of the neighboring cell during the measurement gap, thereby measuring the signal quality of the neighboring cell.
  • the terminal wants to obtain the timing information of the NR neighboring cell, it must receive the SSB of the neighboring cell.
  • Symbol synchronization is obtained through PSS (Primary Synchronization Signal) and SSS (Secondary Synchronization Signal) in SSB, and the PCI (Physical Cell Identity, physical cell identity) of the cell is obtained; through DMRS ( Demodulation Reference Signal and PBCH (Physical Broadcast Channel) obtain frame synchronization and system frame number.
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • PCI Physical Cell Identity, physical cell identity
  • DMRS Demodulation Reference Signal and PBCH (Physical Broadcast Channel) obtain frame synchronization and system frame number.
  • DMRS Demodulation Reference Signal and PBCH (Physical Broadcast Channel)
  • the protocol supports SFTD measurement in the inactive period of connected discontinuous reception (CONNECTED Discontinuous Reception, CDRX) in the RRC_CONNECTED state.
  • CDRX connected discontinuous reception
  • the terminal does not need to send and receive data on the serving cell, and can adjust the radio frequency path to the frequency point where the NR neighboring cell is located, receive the NR neighboring cell signal, and obtain the timing information of the NR neighboring cell.
  • Whether the terminal can enter the CDRX inactive period depends on the current business conditions. If there are continuous up and down data services, the terminal will not be able to enter the CDRX inactive period, resulting in the failure to complete the SFTD measurement before the SFTD measurement report timing times out.
  • the protocol supports lossy measurement without gap, that is, the terminal interrupts the signal transmission and reception on the serving cell within a period of time, and receives the signal from the NR neighboring cell to measure SFTD.
  • this method is lossy.
  • data cannot be sent and received during the interruption.
  • RRC signaling cannot be received during the interruption, resulting in inconsistent status between the base station and the terminal. After the interruption, the terminal and the base station are inconsistent. Data services cannot be restored.
  • this application proposes a new method for SFTD measurement based on the situation that SFTD measurement in the RRC_CONNECTED state cannot be implemented in some scenarios.
  • the network side broadcasts the list of target frequency points measured by SFTD in SIB (System Information Block), and each target frequency point optionally includes the PCI (Physical Cell Identity) of the target cell on the frequency point ) List, the UE measures SFTD in the RRC_IDLE/RRC_INACTIVE state, and reports the SFTD result when or after the establishment of the RRC_CONNECTED state, as shown in Figure 6, the method specifically includes the following steps:
  • Step 601 The terminal device receives the first information sent by the network side, the first information is used to instruct the terminal device to perform the RRC_IDLE/RRC_INACTIVE state SFTD measurement target frequency list, and each target frequency point may optionally include the frequency point PCI list of the target cell.
  • the first information may be periodically sent by the base station in the form of broadcast, and the terminal device reads the first information during the process of camping on the cell.
  • the terminal receives system messages of the target cell, such as SIB messages, before camping on the target cell.
  • the first message may also include a first indicator bit, where the indicator bit is used to instruct the terminal device to perform the SFTD measurement of the neighboring cell.
  • Step 602 The terminal device performs SFTD measurement.
  • the terminal reads the first message of the cell. If the SFTD measurement target frequency point list is indicated in the first information, the terminal device performs SFTD measurement on each target frequency point in the target frequency point list in the RRC_IDLE/RRC_INACTIVE state.
  • the terminal device detects the possible NR neighboring cells on the frequency point in the RRC_IDLE/RRC_INACTIVE state, and selects the N most The strong neighbor cell is used as the target cell to measure the current PCell and the SFTD of the target neighbor cell; if a target frequency in the target frequency list includes the PCI list of the target cell on that frequency, the terminal device is in RRC_IDLE The /RRC_INACTIVE state measures the SFTD between the PCell and the target cell included in the PCI list.
  • the terminal device In the RRC_IDLE/RRC_INACTIVE state, the terminal device detects the SSB of the target cell during the idle time. Symbol synchronization is obtained through PSS and SSS in SSB; frame synchronization and system frame number are obtained through DMRS and PBCH in SSB, so that the terminal obtains synchronization with the target cell. As shown in FIG. 7, the terminal obtains the SFTD result by calculating the SFN deviation between the PCell and the target cell corresponding to the same time and the frame boundary deviation.
  • SFN offset (n-m+1024) mod 1024
  • Frame boundary offset Downward forensics ((TS 1 -TS 2 )/5)
  • n and m are the SFN of the PCell and the SFN of the target cell at a certain moment, and frame n starts earlier than frame m;
  • TS 1 and TS 2 are the start moments of frame n and frame m, respectively, and the unit is Ts.
  • Step 603 When the terminal device sends an RRC connection request.
  • the terminal device initiates an RRC connection to the network side, for example, sends an RRC Connection Request message to the network side.
  • RRC_IDLE state e.g., the terminal device needs to transition from the RRC_IDLE state to the RRC_CONNECTED state, it will trigger an RRC connection request, for example, the terminal device needs to make an RRC connection request.
  • Step 604 The terminal device receives the response message of the RRC connection request.
  • the network side When the network side receives the RRC connection request initiated by the terminal device, the network side initiates an RRC connection establishment message, such as sending an RRC Connection Setup message to the terminal device.
  • an RRC connection establishment message such as sending an RRC Connection Setup message to the terminal device.
  • Step 605 RRC connection establishment is completed.
  • the terminal device may send an RRC Connection Complete message to the network side to indicate the completion of the RRC connection establishment.
  • the terminal device may carry the SFTD measurement result before the RRC establishment in the RRC Connection Complete message.
  • the network side may also send the measured frequency and PCI information of the target cell in a SIB message (System Information Block, system information block), and the information elements are as follows:
  • the terminal When the terminal is camping on the cell, it can read the SIB information from the network side.
  • the terminal can initiate SFTD measurement in the RRC_IDLE state before initiating registration to the cell, and report the SFTD measurement result in the RRC connection establishment process that initiated the registration; it can also initiate SFTD measurement in other RRC_IDLE states/RRC_INACTIVE states, and report it during the next RRC connection establishment process. SFTD measurement results.
  • the terminal may report the SFTD measurement result in the RRC signaling RRC ConnectionSetupComplete of the RRC connection establishment process, and the SFTD measurement result information element is as follows:
  • the first information can be placed in SIB1, SIB2, or SIB3 in LTE, or placed in SIB4, SIB5, and SIB24 according to the target frequency as the same frequency, different frequency, or different system frequency.
  • the terminal needs to read these 3 SIB messages to obtain complete SFTD target frequency information.
  • the first information can be placed in SIB1 or SIB2, or placed in SIB3 and SIB4 according to the target frequency as the same frequency or different frequency.
  • the terminal needs to read these two SIB messages to obtain the complete SFTD.
  • Target frequency point information is an SIB1, SIB2, or SIB3 in LTE, or placed in SIB4, SIB5, and SIB24 according to the target frequency as the same frequency, different frequency, or different system frequency.
  • each frequency point information may include one
  • the signal strength threshold sftd-Threshold, the delay threshold timeToTrigger, and the trigger relationship triggerRelation indicate that when the signal strength of the PCell is continuously timeToTrigger lower or higher than the threshold sftd-Threshold, the SFTD measurement is triggered.
  • the terminal does not need to send and receive signals on the serving cell, and these idle times can be used to receive signals from neighboring cells. Since the timing offset between the two cells is fixed, it can also be used when measuring SFTD in the RRC_IDLE/RRC_INACTIVE state, and when the base station configures the measurement gap in the RRC_CONNECTED state. A large amount of idle time in the RRC_IDLE/RRC_INACTIVE state can measure the timing deviation between the PCell and multiple neighboring cells on multiple frequency points.
  • the RRC_IDLE/RRC_INACTIVE state detects the timing deviation between the two cells, it can be applied to all other users in the cell.
  • measure the SFTD in the RRC_IDLE/RRC_INACTIVE state to avoid the base station from initiating SFTD measurement for configuring the measurement gap before configuring the RRM measurement, which causes the RRM measurement delay to increase, and there is a risk of call drop due to untimely handover in high-speed mobile scenarios.
  • the terminal may reselect from cell 1 to cell 2. If both cells are configured with SFTD measurement in the RRC_IDLE/RRC_INACTIVE state, the terminal will obtain the difference between cell 1 and its neighboring cells. SFTD measurement results between cell 2 and its neighboring cells.
  • the terminal enters the RRC_CONNECTED state and reports the SFTD measurement result, only the SFTD measurement result related to the current PCell of the terminal is reported, that is: if the terminal reselects to cell 2 and enters the RRC_CONNECTED state on cell 2, only the SFTD result is reported Report the SFTD measurement result between cell 2 and its neighboring cells.
  • another SFTD measurement method is provided.
  • the difference between the SFTD measurement in the RRC_IDLE state is that the conversion from the RRC_INACTIVE state to the RRC_CONNECTED state uses the RRC recovery process. Therefore, the terminal reports the SFTD measurement result in the RRC signaling RRCConnection Resume Complete.
  • the specific process is as follows:
  • Step 801 The terminal device receives the first information sent by the network side, the first information is used to instruct the terminal device to perform the RRC_IDLE/RRC_INACTIVE state SFTD measurement target frequency point list, and each target frequency point can optionally include the frequency point PCI list of the target cell.
  • the terminal before camping on the target cell, the terminal will receive the system message of the target cell, such as the SIB message, and after the terminal device completes camping, it will enter the RRC_CONNECTED state.
  • the base station can choose to switch the terminal from the RRC_CONNECTED state to the RRC_INACTIVE state to save power consumption of the terminal.
  • the base station can quickly enter the RRC_CONNECTED state for the RRC connection.
  • the first information can be placed in SIB1, SIB2, or SIB3 in LTE, or placed in SIB4, SIB5, and SIB24 according to the target frequency as the same frequency, different frequency, or different system frequency.
  • the terminal needs to read these 3 SIB messages to obtain complete SFTD target frequency information.
  • the first information can be placed in SIB1 or SIB2, or placed in SIB3 and SIB4 according to the target frequency as the same frequency or different frequency.
  • the terminal needs to read these two SIB messages to obtain the complete SFTD.
  • Target frequency point information is an SIB1, SIB2, or SIB3 in LTE, or placed in SIB4, SIB5, and SIB24 according to the target frequency as the same frequency, different frequency, or different system frequency.
  • the information element in the SIB message used in this step may be the same as the embodiment corresponding to FIG. 6.
  • Step 802 The terminal device performs SFTD measurement.
  • SFTD The specific measurement steps of SFTD may be the same as step 602.
  • Step 803 The terminal device sends an RRC connection recovery request.
  • a terminal device needs to initiate an RRC recovery procedure from the RRC_INACTIVE state to the RRC connected state, such as sending an RRC Connection Resume Request to the network side.
  • Step 804 The terminal device receives the response message of the RRC connection request.
  • the network side After receiving the RRC recovery request initiated by the terminal device, the network side initiates an RRC Connection Resume recovery process to the terminal device.
  • Step 805 The RRC ConnectionResume process is completed.
  • the terminal device can send an RRC Connection Resume Complete message to the network side to indicate the completion of the RRC connection establishment.
  • the terminal device can carry the SFTD measurement result before the RRC establishment is completed in the RRC Connection Resume Complete message.
  • the above-mentioned SFTD measurement result before the completion of the RRC establishment can also be alone.
  • the foregoing embodiment is an example of SFTD measurement in the RRC_INACTIVE state.
  • the difference from the SFTD measurement in the RRC_IDLE state is that the conversion from the RRC_INACTIVE state to the RRC_CONNECTED state uses the RRC recovery procedure. Therefore, the terminal reports the SFTD measurement result in the RRC signaling RRCConnectionResumeComplete.
  • information elements may be added to the RRC Connection Resume Complete message, and the description of the information elements is as follows:
  • each frequency point information may include one
  • the signal strength threshold sftd-Threshold, the delay threshold timeToTrigger, and the trigger relationship triggerRelation indicate that when the signal strength of the PCell is continuously timeToTrigger lower or higher than the threshold sftd-Threshold, the SFTD measurement is triggered.
  • another embodiment of the present application also provides a SFTD measurement method.
  • the SFTD measurement result in the RRC_IDLE state can be reported to the base station through RRC signaling after the RRC connection is restored.
  • Step 901 The terminal device receives the first information sent by the network side.
  • the first information is used to instruct the terminal device to perform the RRC_IDLE/RRC_INACTIVE state SFTD measurement target frequency list, and each target frequency point can optionally include the frequency point PCI list of the target cell.
  • the terminal before camping on the target cell, the terminal will receive the system message of the target cell, such as the SIB message, and after the terminal device completes camping, it will enter the RRC_CONNECTED state.
  • the base station can choose to switch the terminal from the RRC_CONNECTED state to the RRC_INACTIVE state to save power consumption of the terminal.
  • the base station can quickly enter the RRC_CONNECTED state for the RRC connection.
  • the first information can be placed in SIB1, SIB2, or SIB3 in LTE, or placed in SIB4, SIB5, and SIB24 according to the target frequency as the same frequency, different frequency, or different system frequency.
  • the terminal needs to read these 3 SIB messages to obtain complete SFTD target frequency information.
  • the first information can be placed in SIB1 or SIB2, or placed in SIB3 and SIB4 according to the target frequency as the same frequency or different frequency.
  • the terminal needs to read these two SIB messages to obtain the complete SFTD.
  • Target frequency point information is an SIB1, SIB2, or SIB3 in LTE, or placed in SIB4, SIB5, and SIB24 according to the target frequency as the same frequency, different frequency, or different system frequency.
  • the information element in the SIB message used in this step may be the same as the embodiment corresponding to FIG. 6.
  • Step 902 The terminal device performs SFTD measurement.
  • SFTD The specific measurement steps of SFTD can be the same as 602.
  • Step 903 When the terminal device sends an RRC connection request.
  • the terminal device initiates an RRC connection to the network side, such as sending an RRC Connection Request message to the network side.
  • RRC Connection Request message such as sending an RRC Connection Request message to the network side.
  • the terminal device needs the connection state from the IDLE state, it will trigger the RRC connection request.
  • the terminal device needs to perform, When responding to paging, TAU, Attach and other actions.
  • Step 904 The terminal device receives the response message of the RRC connection request.
  • the network side When the network side receives the RRC connection request initiated by the terminal device, the network side initiates an RRC connection establishment message, such as sending an RRC Connection Setup message to the terminal device method.
  • Step 905 RRC connection establishment is completed.
  • the terminal device may send an RRC Connection Complete message to the network side to indicate the completion of the RRC connection establishment and at the same time indicate that the base station terminal obtains the SFTD measurement result, for example, increase the cell SFTDIdleMeasAvailable and set it to TRUE.
  • Step 906 The network side initiates a request to the terminal device to obtain the SFTD measurement result.
  • the network side can initiate a UE Information Request message to the terminal device to instruct the terminal to report the SFTD measurement result, for example, add the cell SFTDIdleMeasReq and set it to TRUE.
  • Step 907 The terminal device returns a response, reporting the SFTD measurement result.
  • the terminal device may also carry the SFTD information measured before the RRC connection in the UE Information Response information. So that the network side configures the neighbor cell measurement gap according to the SFTD measurement result.
  • the cell SFTDIdleMeasAvailable and cell SFTDIdleMeasReq have a form as follows:
  • the SFTDIdleMeasAvailable field is optional. If it is included in the RRCConnectionSetupComplete signaling, this field is set to true, indicating that the terminal has obtained the SFTD measurement result; if it is not included in the RRCConnectionSetupComplete signaling, it indicates that the standard terminal has not obtained the SFTD measurement result.
  • the SFTDIdleMeasReq field is optional. If it is included in the UEInformationRequest signaling, this field is set to true, indicating that the base station instructs the terminal to report the SFTD measurement result; if it is not included in the UEInformationRequest signaling, it indicates that the base station does not require the terminal to report the SFTD measurement result.
  • each frequency point information may include one
  • the signal strength threshold sftd-Threshold, the delay threshold timeToTrigger, and the trigger relationship triggerRelation indicate that when the signal strength of the PCell is continuously timeToTrigger lower or higher than the threshold sftd-Threshold, the SFTD measurement is triggered.
  • the embodiment of the present application also provides another embodiment, as shown in FIG. 10, which is basically the same as the SFTD measurement result reporting process in the RRC_IDLE state, except that the conversion from the RRC_INACTIVE state to the RRC_CONNECTED state uses the RRC recovery process. Therefore, the terminal indicates in the RRC signaling RRCConnectionResumeComplete that the base station terminal has obtained the SFTD measurement result (the cell SFTDIdleMeasAvailable is set to TRUE), and the method includes the following steps:
  • Step 1001 The terminal device receives the first information sent by the network side.
  • the first information is used to instruct the terminal device to perform the RRC_IDLE/RRC_INACTIVE state SFTD measurement target frequency list, and each target frequency point can optionally include the frequency point PCI list of the target cell.
  • the terminal before camping on the target cell, the terminal will receive the system message of the target cell, such as the SIB message, and after the terminal device completes camping, it will enter the RRC_CONNECTED state.
  • the base station can choose to switch the terminal from the RRC_CONNECTED state to the RRC_INACTIVE state to save power consumption of the terminal.
  • the base station can quickly enter the RRC_CONNECTED state for the RRC connection.
  • the first information can be placed in SIB1, SIB2, or SIB3 in LTE, or placed in SIB4, SIB5, and SIB24 according to the target frequency as the same frequency, different frequency, or different system frequency.
  • the terminal needs to read these 3 SIB messages to obtain complete SFTD target frequency information.
  • the first information can be placed in SIB1 or SIB2, or placed in SIB3 and SIB4 according to the target frequency as the same frequency or different frequency.
  • the terminal needs to read these two SIB messages to obtain the complete SFTD.
  • Target frequency point information is an SIB1, SIB2, or SIB3 in LTE, or placed in SIB4, SIB5, and SIB24 according to the target frequency as the same frequency, different frequency, or different system frequency.
  • Step 1002 The terminal device performs SFTD measurement.
  • This step can use the same method as step 602.
  • Step 1003 The terminal device sends an RRC connection recovery request.
  • a terminal device needs to initiate an RRC recovery procedure from the RRC_INACTIVE state to the RRC connected state, such as sending an RRC Connection Resume Request to the network side.
  • Step 1004 The terminal device receives the response message of the RRC connection request.
  • the network side After receiving the RRC recovery request initiated by the terminal device, the network side initiates an RRC Connection Resume recovery process to the terminal device.
  • Step 1005 The RRC ConnectionResume process is completed.
  • the terminal device can send an RRC Connection Resume Complete message to the network side to indicate that the RRC connection establishment is complete.
  • the RRC signaling RRCConnectionResumeComplete indicates that the base station terminal has obtained the SFTD measurement result, such as adding the cell SFTDIdleMeasAvailable and setting it to TRUE .
  • Step 1006 The network side initiates a request to the terminal device.
  • the network side can initiate a UE Information Request message to the terminal device to instruct the terminal to report the SFTD measurement result, for example, add the cell SFTDIdleMeasReq and set it to TRUE.
  • Step 1007 The terminal device returns a response.
  • the terminal device may also carry the SFTD information measured before the RRC connection in the UE Information Response information. So that the network side configures the neighbor cell measurement gap according to the SFTD measurement result.
  • the cell SFTDIdleMeasAvailable and cell SFTDIdleMeasReq have a form as follows:
  • the SFTDIdleMeasAvailable field is optional. If it is included in the RRCConnectionSetupComplete signaling, this field is set to true, indicating that the terminal has obtained the SFTD measurement result; if it is not included in the RRCConnectionSetupComplete signaling, it indicates that the standard terminal has not obtained the SFTD measurement result.
  • the SFTDIdleMeasReq field is optional. If it is included in the UEInformationRequest signaling, this field is set to true, indicating that the base station instructs the terminal to report the SFTD measurement result; if it is not included in the UEInformationRequest signaling, it indicates that the base station does not require the terminal to report the SFTD measurement result.
  • each frequency point information may include one
  • the signal strength threshold sftd-Threshold, the delay threshold timeToTrigger, and the trigger relationship triggerRelation indicate that when the signal strength of the PCell is continuously timeToTrigger lower or higher than the threshold sftd-Threshold, the SFTD measurement is triggered.
  • the base station sets the threshold value according to the coverage area of the cell. As shown in Figure 4, when the RSRP of the PCell measured by the terminal is lower than a certain threshold, it means that the terminal is at the edge of cell 1, and may be within the coverage of cell 3. Therefore, when configuring SFTD measurement between PCell and cell 3, configure The trigger condition is that the RSRP of the PCell is lower than a certain threshold; when the RSRP of the PCell measured by the terminal is higher than a certain threshold, it means that the terminal is in the center of cell 1, and may be within the coverage of cell 2, so the configuration between PCell and cell 2 When the SFTD is measured, the configuration trigger condition is that the RSRP of the PCell is higher than a certain threshold.
  • the terminal device measures the SFTD in the RRC_IDLE/RRC_INACTIVE state, and reports the measurement result in the RRC_CONNECTED state.
  • the terminals located in different coverage areas all report the PCell and the SFTDs of some neighboring intervals, and the base station side can obtain the PCell and the SFTDs of all neighboring intervals. For example, in 4, terminal 1 reports the SFTD of cell 1 and cell 2, and terminal 2 reports the SFTD of cell 1 and cell 3.
  • the base station has complete SFTD information of cell 1 and all neighboring cells (cell 2 and cell 3).
  • the RRC_IDLE/RRC_INACTIVE state has a lot of idle time, and there is no problem that the SFTD measurement cannot be implemented without the CDRX inactive period; compared to the RRC_CONNECTED state requires a gap SFTD measurement method, Use RRC_IDLE/RRC_INACTIVE state idle time to measure neighboring cells, without the need for the base station to allocate gaps, and the idle time reaches the second level, no matter how large the SSB cycle is, the terminal can receive the signal of the entire SSB cycle, thereby detecting the SSB. A large amount of idle time also means that more target frequency points and cells can be measured than in the RRC_CONNECTED state.
  • the embodiment of the present application also provides another SFTD measurement method. Configure the SFTD measurement in the RRC_IDLE/RRC_INACTIVE state in the RRC_CONNECTED state, and report the measurement result when/after the next RRC connection is established. As shown in Figure 11, the specific method includes the following steps:
  • Step 1101 The network side initiates an RRC Connection Reconfiguration message.
  • the network side can initiate an RRC Connection Reconfiguration reconfiguration message to the terminal device.
  • the message can indicate the target frequency list for configuring the RRC_IDLE/RRC_INACTIVE state SFTD measurement, and each The target frequency optionally includes the PCI list of the target cell on the frequency.
  • Step 1102 The terminal device completes RRC Connection Reconfiguration.
  • the terminal device sends an RRC Connection Reconfiguration Complete message to the network side.
  • Step 1103 The network side releases the RRC connection.
  • Step 1104 The terminal device performs SFTD measurement.
  • the SFTD measurement is performed, and the measurement method may be the same as step 602.
  • Step 1105 When the terminal device sends an RRC connection request.
  • the terminal device initiates an RRC connection to the network side, such as sending an RRC Connection Request message to the network side.
  • RRC Connection Request message such as sending an RRC Connection Request message to the network side.
  • the terminal device needs the connection state from the IDLE state, it will trigger the RRC connection request.
  • the terminal device needs to perform, When responding to paging, TAU, Attach and other actions.
  • Step 1106 The terminal device receives the response message of the RRC connection request.
  • the network side When the network side receives the RRC connection request initiated by the terminal device, the network side initiates an RRC connection establishment message, such as sending an RRC Connection Setup message to the terminal device method.
  • Step 1107 The RRC connection is established.
  • the terminal device may send an RRC Connection Setup Complete message to the network side to indicate that the RRC connection is established.
  • the terminal device may carry the SFTD measurement result before the RRC establishment is completed in the RRC Connection Complete message. In some embodiments , Or the SFTD measurement result before the completion of the above-mentioned RRC establishment alone.
  • the terminal may report the SFTD measurement result in the RRC signaling RRC ConnectionSetupComplete of the RRC connection establishment process, and the SFTD measurement result information element is as follows:
  • the embodiment of the present application also provides another SFTD measurement method. Configure the SFTD measurement in the RRC_IDLE/RRC_INACTIVE state in the RRC_CONNECTED state, and report the measurement result when/after the next RRC connection is established. As shown in Figure 12, the specific method includes the following steps:
  • Step 1201 The network side initiates an RRC Connection Reconfiguration message
  • the network side can send the terminal device RRC Connection Reconfiguration reconfiguration message, which can indicate the target frequency list for configuring the RRC_IDLE/RRC_INACTIVE state SFTD measurement, and each target The frequency point may optionally include the PCI list of the target cell on the frequency point, and the set information element may be the same as in the foregoing embodiment.
  • Step 1202 The terminal device completes RRC Connection Reconfiguration.
  • the terminal device sends an RRC Connection Reconfiguration Complete message to the network side.
  • Step 1203 The network side suspends the RRC connection.
  • Step 1204 The terminal device performs SFTD measurement.
  • the SFTD measurement is performed, and the measurement method may be the same as step 602.
  • Step 1205 The terminal device sends an RRC connection recovery request.
  • a terminal device needs to initiate an RRC recovery procedure from the RRC_INACTIVE state to the RRC connected state, such as sending an RRC Connection Resume Request to the network side.
  • Step 1206 The terminal device receives the response message of the RRC connection request.
  • the network side After receiving the RRC recovery request initiated by the terminal device, the network side initiates an RRC Connection Resume recovery process to the terminal device.
  • Step 1207 The RRC ConnectionResume process is completed.
  • the terminal device can send an RRC Connection Resume Complete message to the network side to indicate the completion of the RRC connection establishment.
  • the terminal device can carry the SFTD measurement result before the RRC establishment is completed in the RRC Connection Resume Complete message.
  • the above-mentioned SFTD measurement result before the completion of the RRC establishment can also be alone.
  • the terminal may report the SFTD measurement result in the RRC signaling RRC RRC Connection Resume Complete of the RRC connection establishment process, and the SFTD measurement result information element is as follows:
  • the terminal completes the SFTD measurement in the RRC_IDLE state, and reports the SFTD measurement result in the RRC signaling RRCConnectionSetupComplete of the RRC connection establishment process.
  • the SFTD measurement result can also be reported to the base station through RRC signaling after the RRC connection is established, for example, the SFTD measurement result is reported in the RRC signaling UEInformationResponse.
  • the terminal completes the SFTD measurement in the RRC_INACTIVE state, and reports the SFTD measurement result in the RRC signaling RRCConnectionResumeComplete of the RRC connection recovery process.
  • the SFTD measurement result can also be reported to the base station through RRC signaling after the RRC connection is established, for example, the SFTD measurement result is reported in the RRC signaling UEInformationResponse.
  • the terminal device measures the SFTD in RRC_IDLE/RRC_INACTIVE, and reports the measurement result in the RRC_CONNECTED state.
  • the embodiment as shown in Figure 6-10 is to send the target frequency list of SFTD through broadcast (SIB message), and each target frequency optionally contains the PCI list of the target cell on the frequency point, in the cell All terminals must perform SFTD measurements on the same frequency and cell.
  • SIB message broadcast
  • each target frequency optionally contains the PCI list of the target cell on the frequency point
  • the network side can selectively select some terminals to perform SFTD measurement on some frequency points and cells.
  • the terminals located in different coverage areas all report the PCell and the SFTDs of some neighboring intervals, and the base station side can obtain the PCell and the SFTDs of all neighboring intervals.
  • the base station knows that the terminal 1 is inside the cell 1 (because the RSRP of Cell1 is higher) according to the RSRP of Cell1 reported by the terminal 1 and the terminal 2, and configures the terminal 1 within the coverage of the cell 2.
  • the base station can determine whether to trigger a terminal to perform SFTD measurement according to the currently obtained SFTD situation. In the example shown in FIG. 4, the base station obtains the complete information of the SFTD in the neighboring interval in the network through the terminal 1 and the terminal 2. For other terminals, the base station no longer needs to trigger the SFTD measurement.
  • the embodiment of the present application also provides another SFTD measurement method, which adds support for SFTD measurement in the RRC_IDLE/RRC_INACTIVE state by multiplexing the current protocol RRM measurement mechanism in the RRC_IDLE/RRC_INACTIVE state.
  • the specific steps include:
  • Step 1301 The terminal device receives the first information sent by the network side, indicating that the terminal base station supports RRC_IDLE/RRC_INACTIVE state SFTD measurement.
  • the first information includes an indicator bit indicating that the terminal base station supports RRC_IDLE/RRC_INACTIVE state SFTD measurement capability .
  • the first information may be a system message, such as an SIB message, which includes a field indicating that the terminal base station supports RRC_IDLE/RRC_INACTIVE state SFTD measurement.
  • Step 1302 After the RRC connection is established, the network side performs a capability query on the terminal device.
  • the network side sends the UE Capability Enquiry to the terminal device to query the capabilities of the terminal, including but not limited to measurement capabilities.
  • Step 1303 The terminal device returns the UE CapabilityInformation to the network side, which includes a field indicating that the terminal device supports RRC_IDLE/RRC_INACTIVE state SFTD measurement.
  • Step 1304 The network side releases the RRC connection.
  • the RRC connection release message may also carry a list of target frequency points measured by SFTD in the RRC_IDLE/RRC_INACTIVE state, and each target frequency point may optionally include the PCI list of the target cell on the frequency point.
  • information elements can be added to the RRC connection release message.
  • the information elements can be as follows:
  • Step 1305 The terminal device performs SFTD measurement.
  • the measurement method in this step can be the same as step 602.
  • Step 1306 When the terminal device sends an RRC connection request.
  • the terminal device initiates an RRC connection to the network side, such as sending an RRC Connection Request message to the network side.
  • RRC Connection Request message such as sending an RRC Connection Request message to the network side.
  • the terminal device needs the connection state from the IDLE state, it will trigger the RRC connection request.
  • the terminal device needs to perform, When responding to paging, TAU, Attach and other actions.
  • Step 1307 The terminal device receives the response message of the RRC connection request.
  • the network side When the network side receives the RRC connection request initiated by the terminal device, the network side initiates an RRC connection establishment message, such as sending an RRC Connection Setup message to the terminal device method.
  • Step 1308 RRC connection establishment is completed.
  • the terminal device can send an RRC Connection Setup Complete message to the network side to indicate the completion of the RRC connection establishment.
  • the RRC Connection Setup Complete message indicates that the base station terminal has obtained the SFTD measurement result.
  • Step 1309 The network side initiates a request to the terminal device.
  • the network side can initiate a UE Information Request message to the terminal device to instruct the terminal to report the SFTD measurement result.
  • Step 1310 The terminal device returns a response.
  • the terminal device may also carry the SFTD information measured before the RRC connection in the UE Information Response information. So that the network side configures the cell measurement gap according to the result of the SFTD measurement.
  • the terminal device may also carry the SFTD information measured before the RRC connection in the UE Information Response information. So that the network side configures the neighbor cell measurement gap according to the SFTD measurement result.
  • the cell SFTDIdleMeasAvailable and cell SFTDIdleMeasReq have a form as follows:
  • the SFTDIdleMeasAvailable field is optional. If it is included in the RRCConnectionSetupComplete signaling, this field is set to true, indicating that the terminal has obtained the SFTD measurement result; if it is not included in the RRCConnectionSetupComplete signaling, it indicates that the standard terminal has not obtained the SFTD measurement result.
  • the SFTDIdleMeasReq field is optional. If it is included in the UEInformationRequest signaling, this field is set to true, indicating that the base station instructs the terminal to report the SFTD measurement result; if it is not included in the UEInformationRequest signaling, it indicates that the base station does not require the terminal to report the SFTD measurement result.
  • Figure 13 shows an example of SFTD measurement in the RRC_IDLE state, which reuses the RRM measurement process in the RRC_IDLE state supported by the current protocol.
  • SIB2 information elements are used to instruct the base station to support RRC_IDLE state/RRC_INACTIVE state SFTD measurement.
  • the existing cell idleModeMeasurement in the current protocol can be reused, and its meaning can be extended to indicate that the base station supports RRC_IDLE state/RRC_INACTIVE state SFTD measurement at the same time; or define a new cell, for example: idleMode MeasurementSFTD ENUMERATED ⁇ true ⁇ OPTIONAL
  • This field is Optionally, if included in SIB2, this field is set to true, indicating that the base station supports RRC_IDLE state/RRC_INACTIVE state SFTD measurement; if not included in SIB2, it indicates that the base station does not support RRC_IDLE state/RRC_INACTIVE state SFTD measurement, and the base station will not configure it SFTD measurement in RRC_IDLE/RRC_INACTIVE state.
  • UECapabilityInformation In the UE capability reporting signaling UECapabilityInformation, it is indicated that the terminal has RRC_IDLE state/RRC_INACTIVE state SFTD measurement, for example, it includes the cell idleModeSFTDMeas, one form is as follows: idleMode SFTDMeas ENUMERATED ⁇ supported ⁇ OPTIONAL This field is optional, if included in the message In UECapabilityInformation, this field is set to true, indicating that the terminal supports RRC_IDLE state/RRC_INACTIVE state SFTD measurement; if it is not included in SIB2, it means that the terminal does not support RRC_IDLE state/RRC_INACTIVE state SFTD measurement. When the base station obtains this indication, it will not Configure the terminal equipment RRC_IDLE/RRC_INACTIVE state SFTD measurement.
  • SFTD measurement information in the RRC signaling RRCConnectionRelease.
  • One form of the SFTD measurement information is the cell SFTDMeasResultListIdle described in the first embodiment.
  • the RRC signaling RRCConnectionRelease releases the RRC connection at the same time, causing the terminal to enter the RRC_IDLE state.
  • the terminal completes the SFTD measurement in the RRC_IDLE state.
  • the terminal indicates in the RRC connection setup signaling RRCConnectionSetupComplete that the base station terminal obtains the SFTD measurement result, such as adding the cell SFTDIdleMeasAvailable and setting it to TRUE, and the base station instructs the terminal to report the SFTD measurement result in the RRC signaling UEInformationRequest, for example, through the cell SFTDIdleMeasReq And set to TRUE, the terminal reports the SFTD measurement result in the RRC signaling UEInformationResponse.
  • the embodiment of the present application also provides another SFTD measurement method, which adds support for SFTD measurement in the RRC_IDLE/RRC_INACTIVE state by multiplexing the current protocol RRM measurement mechanism in the RRC_IDLE/RRC_INACTIVE state.
  • the specific steps include:
  • Step 1401 The terminal device receives the first information sent by the network side, indicating that the terminal base station supports RRC_IDLE/RRC_INACTIVE state SFTD measurement.
  • the first information includes an indicator bit indicating that the terminal base station supports RRC_IDLE/RRC_INACTIVE state SFTD measurement capability .
  • the first information may be a system message, such as an SIB message, which includes a field indicating that the terminal base station supports RRC_IDLE/RRC_INACTIVE state SFTD measurement.
  • Step 1402 After the RRC connection is established, the network side performs a capability query on the terminal device.
  • the network side sends the UE Capability Enquiry to the terminal device to query the capabilities of the terminal, including but not limited to measurement capabilities.
  • Step 1403 The terminal device returns the UE CapabilityInformation to the network side, which includes a field indicating that the terminal device supports RRC_IDLE/RRC_INACTIVE state SFTD measurement.
  • Step 1404 The network side suspends the RRC connection.
  • the RRC connection release message may also carry a list of target frequency points measured by SFTD in the RRC_IDLE/RRC_INACTIVE state, and each target frequency point may optionally include the PCI list of the target cell on the frequency point.
  • Step 1405 The terminal device performs SFTD measurement.
  • Step 1406 The terminal device sends an RRC connection recovery request.
  • a terminal device needs to initiate an RRC recovery procedure from the RRC_INACTIVE state to the RRC connected state, such as sending an RRC Connection Resume Request to the network side.
  • Step 1407 The terminal device receives the response message of the RRC connection request.
  • the network side After receiving the RRC recovery request initiated by the terminal device, the network side initiates an RRC Connection Resume recovery process to the terminal device.
  • Step 1408 The RRC ConnectionResume process is completed.
  • the terminal device may send an RRC Connection Resume Complete message to the network side to indicate the completion of the RRC connection establishment, and indicate in the RRC signaling RRCConnectionResumeComplete that the base station terminal has obtained the SFTD measurement result, for example, increase the cell SFTDIdleMeasAvailable and set it to TRUE.
  • Step 1409 The network side initiates a request to the terminal device.
  • the network side can initiate a UE Information Request message to the terminal device to instruct the terminal to report the SFTD measurement result, for example, add the cell SFTDIdleMeasReq and set it to TRUE.
  • Step 1410 The terminal device returns a response.
  • the terminal device may also carry the SFTD information measured before the RRC connection in the UE Information Response information. So that the network side configures the cell measurement gap according to the SFTD measurement result.
  • the terminal device may also carry the SFTD information measured before the RRC connection in the UE Information Response information. So that the network side configures the neighbor cell measurement gap according to the SFTD measurement result.
  • the cell SFTDIdleMeasAvailable and cell SFTDIdleMeasReq have a form as follows:
  • the SFTDIdleMeasAvailable field is optional. If it is included in the RRCConnectionSetupComplete signaling, this field is set to true, indicating that the terminal has obtained the SFTD measurement result; if it is not included in the RRCConnectionSetupComplete signaling, it indicates that the standard terminal has not obtained the SFTD measurement result.
  • the SFTDIdleMeasReq field is optional. If it is included in the UEInformationRequest signaling, this field is set to true, indicating that the base station instructs the terminal to report the SFTD measurement result; if it is not included in the UEInformationRequest signaling, it indicates that the base station does not require the terminal to report the SFTD measurement result.
  • Figure 14 shows an example of SFTD measurement in the RRC_INACTIVE state.
  • the RRM measurement process in the RRC_INACTIVE state supported by the current protocol is also reused.
  • the difference from the SFTD measurement process in the RRC_IDLE state is:
  • the RRC signaling RRCConnectionRelease suspends the RRC connection and causes the terminal to enter the RRC_INACTIVE state, instead of releasing the RRC connection and entering the RRC_IDLE state.
  • the SFTD measurement information is also configured in the signaling, and one form of the SFTD measurement information is the information element SFTDMeasResultListIdle described in the first embodiment.
  • the terminal enters the RRC_CONNECTED state through the RRC connection recovery procedure, and the signaling RRCConnectionResumeComplete indicates that the base station terminal has obtained the SFTD measurement result. Subsequently, as with the SFTD measurement process in the RRC_IDLE state, the base station instructs the terminal to report the SFTD measurement result in the RRC signaling UEInformationRequest, and the terminal reports the SFTD measurement result in the RRC signaling UEInformationResponse.
  • the terminal device measures the SFTD in RRC_IDLE/RRC_INACTIVE, and reports the measurement result in the RRC_CONNECTED state.
  • the terminals located in different coverage areas all report the PCell and the SFTDs of some neighboring intervals, and the base station side can obtain the PCell and the SFTDs of all neighboring intervals.
  • the existing RRM measurement process in the RRC_IDLE/RRC_INACTIVE state is reused, but the support for SFTD measurement is added, the protocol modification is small, and the standardization is easy.
  • the terminal device reports this method in the UE Information Response information, if the base station is configured for RRM measurement in the RRC_CONNECTED state It can also be reported in the measurement report message MeasurementReport, for example, the information element SFTDMeasResultListIdle is carried in the MeasurementRepor.
  • the current SFTD measurement is an optional UE capability, so the network may not have any UE to rely on to obtain the time difference.
  • SFTD measurement can be based on gaps or no gaps (ie, based on interruptions).
  • DRX where the UE performs the measurement during the DRX idle period.
  • the UE Based on the current deployment, when the gNB/eNB cannot ensure that the UE can obtain the SFTD result using the configured gap, it is likely that the gap for the SFTD measurement will not be configured for the UE. In this case, the UE must perform interrupt-based or DRX-based SFTD.
  • the SFTD measurement is in the RRC_IDLE/RRC_INACTIVE state.
  • the SFTD measurement should be performed by the UE in the RRC_CONNECTED state, so the measurement may interrupt the UE's data transmission.
  • the UE is not scheduled to transmit data in idle mode, which means that SFTD measurement can be performed by the UE without negatively affecting the scheduling.
  • the UE in idle mode has more time to perform SFTD, so the measurement performance of SFTD can be guaranteed (for example, the UE can obtain the result of SFTD in a short time, so the network can be more timely To obtain the time difference information). Therefore, we suggest that the SFTD measurement can be performed by the UE in the RRC_IDLE/RRC_INACTIVE state.
  • FIG. 15 illustrates the general process of the proposed solution. As shown in the figure, there may be four steps. For details, refer to the specific embodiment described in FIGS. 6-14 of this application.
  • Step 1501 The network provides an SFTD measurement configuration or instruction to the UE through an RRC release message or system information, which may include the target cell/frequency of the SFTD measurement.
  • Step 1502 The UE performs SFTD measurement in the RRC_IDLE/RRC_INACTIVE state.
  • Step 1503 If necessary, the network may request the UE to report the SFTD result.
  • the detailed mechanism is for further study.
  • the network may send a query indication/message to a specific UE or in system information.
  • Step 1504 The UE reports the SFTD result according to the request of the network or the request of no network.
  • step 1504 it should pay attention to one thing.
  • other standards may be required in step 1504 to ensure that the SFTD result is reported to the correct gNB/eNB. For example, if the UE camps on a cell that is not an earlier serving cell that provides SFTD measurement configuration/indication or is not a target cell of SFTD measurement, the UE should discard the SFTD result instead of sending it to an unrelated cell.
  • the UE In order to avoid reporting SFTD results to unrelated cells, when the current serving cell of the UE is not an earlier serving cell that provides SFTD measurement configuration/indication or is not a target cell for SFTD measurement, the UE should discard the SFTD result.
  • the current SFTD measures and proposes two possible alternatives, which provide other ways for the network to obtain timing difference information.
  • the current SFTD measurement is an optional UE capability, so the network may not have any UE to rely on to obtain the time difference.
  • the interrupt-based SFTD measurement may have a negative impact on the UE, while the DRX-based SFTD measurement may have poor performance.
  • the UE in RRC_IDLE/RRC_INACTIVE does not need to perform data transmission and has more time to perform SFTD measurement, so the SFTD measurement performance can be improved without affecting UE scheduling.
  • the embodiment of the present application allows the UE to perform SFTD measurement in the RRC_IDLE state or the RRC_INACTIVE state. Further, in order to avoid reporting SFTD results to unrelated cells, when the current serving cell of the UE is not an earlier serving cell that provides SFTD measurement configuration/indication or is not a target cell for SFTD measurement, the UE should discard the SFTD result.
  • the terminal when the terminal obtains the SFTD measurement configuration information in the SIB message of cell 1 on cell 1, the SFTD results of cell 1 and cell 2 are measured. Before reporting the SFTD measurement result, the terminal reselects to cell 3, obtains the SFTD measurement configuration information in the SIB message of cell 3, and measures the SFTD measurement results of cell 3 and cell 2, and cell 3 and cell 4. The terminal enters the RRC_CONNECTED state on cell 3, and only reports the SFTD measurement results of cell 3 and cell 2, and cell 3 and cell 4. When the terminal reselects to cell 1 again and enters the RRC_CONNECTED state on cell 1, the terminal can directly report the SFTD results of cell 1 and cell 2.
  • the terminal when the terminal obtains SFTD measurement configuration information through RRC signaling on cell 1, the SFTD results of cell 1 and cell 2 are measured in the RRC_IDLE state. Before reporting the SFTD measurement result, the terminal reselects to cell 3 and enters the RRC_CONNECTED state on cell 3. At this time, the terminal does not report the SFTD results of cell 1 and cell 2. If the terminal obtains the SFTD measurement configuration information of cell 3 through RRC signaling, and measures the SFTD measurement results of cell 3 and cell 2, and cell 3 and cell 4 in the RRC_IDLE state, when the terminal enters the RRC_CONNECTED state on cell 3 again, it will report SFTD measurement results of cell 3 and cell 2, and cell 3 and cell 4. If the terminal returns to camp on cell 1 and enters the RRC_CONNECTED state, the terminal reports the SFTD results of cell 1 and cell 2.
  • the SFTD measurement is performed in the RRC_IDLE state or the RRC_INACTIVE state, and the SFTD measurement result is reported in the RRC_CONNECTED state. Broadcast the frequency and PCI list of the target cell in the SIB information.
  • the terminal measures the SFTD in the RRC_IDLE state or RRC_INACTIVE state, and reports the result when/after the RRC link is established; configures the RRC_IDLE state or the RRC_INACTIVE state for the SFD measurement in the RRC_CONNECTED state, and the terminal is in RRC_IDLE State or RRC_INACTIVE state to measure SFTD, and report the measurement result when/after the next RRC link is established.
  • the base station can configure an RSRP threshold and a time hysteresis threshold in a more realistic network layout.
  • the terminal When the serving cell RSRP is less than the RSRP threshold and the duration is greater than the time hysteresis threshold, the terminal will implement the SFTD measurement in the RRC_IDLE state or the RRC_INACTIVE state, otherwise it will not implement the SFTD measurement. measuring;
  • the base station can configure an RSRP threshold and a time hysteresis threshold in a more realistic network configuration.
  • the terminal When the serving cell RSRP is greater than the RSRP threshold and the duration is greater than the time hysteresis threshold, the terminal will implement the RRC_IDLE state or the RRC_INACTIVE state SFTD measurement, otherwise it will not implement the SFTD measuring.
  • the present application also provides a chip or chip system 1600.
  • the chip system 1600 includes a baseband processor 1601, a transceiver or interface 1602, a memory 1603, etc., where the interface 1602 is used to receive code instructions and receive The code instruction of the terminal device is sent to the processor 1601, and the processor 1610 runs the received code instruction sent by the interface to execute the method and action of the embodiment of the present application to improve the measurement capability of the terminal device.
  • the specific method of the measurement capability of the terminal device may be Refer to the embodiments of the present application, which will not be repeated here.
  • the terminal device (or UE or terminal) 100 may be a mobile phone, a tablet computer, a handheld computer, a notebook computer, an Ultra-mobile Personal Computer (UMPC), a netbook, a cellular phone, and a personal digital device.
  • Assistant Personal Digital Assistant, PDA
  • wearable devices such as smart watches
  • AR augmented reality
  • VR virtual reality
  • the network equipment can be a base station (for example, a GSM base station, an NB base station, an eNB base station, an NR base station, etc.), a server, a network element, etc.
  • the LTE (Long Term Evolution Advanced, "LTE”) network system is used in this embodiment as
  • the network equipment and the user equipment are equipment supporting LTE functions, and this embodiment can be extended to other network systems.
  • Network equipment 1 is a 4G base station that supports LTE function, namely eNB. According to the radio coverage of eNB, it can usually include at least one serving cell (cell), namely serving cell 1.
  • a cell is an area that provides users with wireless communication services.
  • the basic unit of the wireless network, the eNB can also be divided into multiple cells, each cell can use a different wireless carrier, and each wireless carrier uses a certain carrier frequency. This application is not convenient for description.
  • Each cell corresponds to one network device, but it is not limited.
  • One network device can also correspond to multiple different cells, including one primary cell and multiple secondary cells.
  • This application is used for SFTD measurement between cells in a mobile communication network, including between LTE PCell and NR PSCell under EN-DC, between NR PCell under NE-DC and LTE PSCell under NE-DC, and under NR-DC.
  • the embodiments of the present application can be implemented by hardware, firmware, or a combination of them.
  • the above-mentioned functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on the computer-readable medium.
  • the computer-readable medium includes a computer storage medium and a communication medium, where the communication medium includes any medium that facilitates the transfer of a computer program from one place to another.
  • the storage medium may be any available medium that can be accessed by a computer.
  • computer-readable media can include RAM, ROM, electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory, CD- ROM) or other optical disk storage, magnetic disk storage media or other magnetic storage devices, or any other media that can be used to carry or store desired program codes in the form of instructions or data structures and that can be accessed by a computer.
  • EEPROM electrically erasable programmable read-only memory
  • CD- ROM compact disc read-only memory
  • Any connection can suitably become a computer-readable medium.
  • disks and discs include compact discs (CDs), laser discs, optical discs, digital video discs (digital video discs, DVDs), floppy discs, and Blu-ray discs. Disks usually copy data magnetically, while disks use lasers to copy data optically. The above combination should also be included in the protection scope of the computer-readable medium.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un dispositif terminal permettant de réaliser un écart de synchronisation de trame et de numéro de trame système (SFTD), une puce, un dispositif réseau, un procédé et un système. Ledit procédé comprend les étapes suivantes : réception par un dispositif terminal d'un premier message, le premier message étant utilisé pour ordonner au dispositif terminal de réaliser un SFTD dans un état RRC_IDLE/RRC_INACTIVE, le premier message comprenant en outre une liste de points de fréquence cible, et chaque point de fréquence cible contenant éventuellement une liste de cellules cibles sur le point de fréquence ; lorsque le dispositif terminal est dans l'état RRC_IDLE/RRC_INACTIVE, réalisation d'une mesure de SFTD ; et en outre, transmission par le dispositif terminal du résultat de mesure de la mesure de SFTD.
PCT/CN2020/116367 2019-09-30 2020-09-21 Procédé de mesure d'écart de synchronisation de trame et de numéro de trame système (sftd) WO2021063198A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910945457.2 2019-09-30
CN201910945457.2A CN112584426B (zh) 2019-09-30 2019-09-30 一种系统帧号和帧定时偏差sftd测量方法

Publications (1)

Publication Number Publication Date
WO2021063198A1 true WO2021063198A1 (fr) 2021-04-08

Family

ID=75117195

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/116367 WO2021063198A1 (fr) 2019-09-30 2020-09-21 Procédé de mesure d'écart de synchronisation de trame et de numéro de trame système (sftd)

Country Status (2)

Country Link
CN (1) CN112584426B (fr)
WO (1) WO2021063198A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115515232A (zh) * 2021-06-22 2022-12-23 维沃移动通信有限公司 间隙gap动态处理方法、终端及网络侧设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107005906A (zh) * 2015-08-07 2017-08-01 华为技术有限公司 一种数据传输和接入网络方法及相关设备、系统
US20190149365A1 (en) * 2018-01-12 2019-05-16 Intel Corporation Time domain resource allocation for mobile communication
WO2019137413A1 (fr) * 2018-01-10 2019-07-18 Mediatek Inc. Appareils et procédés d'extension d'utilisation de mesures de sfn (nombre de trames système) et de différence de synchronisation de trame (sftd)
WO2019160266A1 (fr) * 2018-02-13 2019-08-22 Lg Electronics Inc. Procédé de mesure de différence de rythme des trames et équipement utilisateur mettant en œuvre le procédé

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106171007B (zh) * 2014-12-31 2019-09-20 华为技术有限公司 一种确定重选目标小区的方法、装置及终端
CN109391998B (zh) * 2017-08-04 2020-09-15 电信科学技术研究院 一种邻区测量方法及装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107005906A (zh) * 2015-08-07 2017-08-01 华为技术有限公司 一种数据传输和接入网络方法及相关设备、系统
WO2019137413A1 (fr) * 2018-01-10 2019-07-18 Mediatek Inc. Appareils et procédés d'extension d'utilisation de mesures de sfn (nombre de trames système) et de différence de synchronisation de trame (sftd)
US20190149365A1 (en) * 2018-01-12 2019-05-16 Intel Corporation Time domain resource allocation for mobile communication
WO2019160266A1 (fr) * 2018-02-13 2019-08-22 Lg Electronics Inc. Procédé de mesure de différence de rythme des trames et équipement utilisateur mettant en œuvre le procédé

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ZTE CORPORATION ET AL.: "Further Clarification on SFTD Measurement", 3GPP TSG-RAN WG2 MEETING #103BIS R2-1813943, 27 September 2018 (2018-09-27), XP051523412 *

Also Published As

Publication number Publication date
CN112584426B (zh) 2022-12-06
CN112584426A (zh) 2021-03-30

Similar Documents

Publication Publication Date Title
US20220030490A1 (en) Machine-to-machine (m2m) terminal, base station, method, and computer readable medium
JP6295311B2 (ja) 無線通信システムにおけるｍｂｍｓ情報報告方法及びそれをサポートする装置
CN111565427B (zh) 网络选择方法、网络设备以及终端设备
CN105898895B (zh) 移动通讯装置及释放连线或资源的方法
EP2823671B1 (fr) Procédé et système destinés à minimiser la consommation d'énergie d'un équipement utilisateur lors de la détection d'une cellule
JP5358735B2 (ja) 限定加入者グループに対してインバウンドモビリティを提供するためのｐｃｉの混乱を解決する方法および装置
US10517031B2 (en) User apparatus, base station, cell selection control method, and parameter transmission method
US20090156196A1 (en) System level information for system information, paging and measurements
JP2008118204A (ja) ユーザ装置及びユーザ装置で使用される方法
US8359034B2 (en) Mobile communication system, base station apparatus, user equipment and method
EP4193695A1 (fr) Informations relatives à une resélection de cellule, associées à une tranche de réseau ou à un groupe d'accès fermé pour des réseaux sans fil
WO2021063198A1 (fr) Procédé de mesure d'écart de synchronisation de trame et de numéro de trame système (sftd)
EP3198901B1 (fr) Découverte de dispositifs dans une communication de dispositif à dispositif utilisant deux types de découverte

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20870962

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20870962

Country of ref document: EP

Kind code of ref document: A1