WO2021164528A1 - Procédé et appareil de transmission de données, support de stockage et terminal - Google Patents

Procédé et appareil de transmission de données, support de stockage et terminal Download PDF

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Publication number
WO2021164528A1
WO2021164528A1 PCT/CN2021/074582 CN2021074582W WO2021164528A1 WO 2021164528 A1 WO2021164528 A1 WO 2021164528A1 CN 2021074582 W CN2021074582 W CN 2021074582W WO 2021164528 A1 WO2021164528 A1 WO 2021164528A1
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Prior art keywords
data transmission
cell
cell reselection
base station
data
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PCT/CN2021/074582
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English (en)
Chinese (zh)
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徐敏
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展讯通信（上海）有限公司
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Publication of WO2021164528A1 publication Critical patent/WO2021164528A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0061—Transmission or use of information for re-establishing the radio link of neighbour cell information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access

Definitions

  • the present invention relates to the field of communication technology, in particular to a data transmission method and device, storage medium, and terminal.
  • the small packet transmission is mainly the uplink and/or downlink transmission of one data packet. If the subsequent uplink and downlink transmission is required, the base station can migrate the user equipment (User Equipment, UE for short) to the connected state, so that the UE The mobility is controlled by the base station. Or during data transmission, if the UE reselects a mobile cell to another cell, it needs to perform the random access procedure again to request resources.
  • User Equipment User Equipment
  • the technical problem solved by the present invention is how to avoid transmission interruption and data loss caused by cell reselection during data transmission of the UE.
  • an embodiment of the present invention provides a data transmission method.
  • the method includes: if the UE is transmitting data, acquiring data transmission cell reselection parameters, so as to perform cell reselection according to the data transmission cell reselection parameters. Option; or, send a network indication to the base station to notify the base station to obtain data transmission information.
  • the UE when it performs cell reselection according to the data transmission cell reselection parameters, it executes raising the priority of the current cell, setting the frequency priority of the current cell to the highest, and adjusting the cell reselection parameters. At least one operation in the cell reselection threshold parameter.
  • the data transmission cell reselection parameter is obtained after adjusting the cell reselection parameter, and the adjustment includes: increasing the threshold for the current cell to trigger intra-frequency measurement, and increasing the current cell to trigger different At least one of the threshold of the frequency measurement and the cell offset of the current cell.
  • the data transmission cell reselection parameters include data transmission timer parameters
  • the performing cell reselection according to the data transmission cell reselection parameters includes: starting data transmission timing according to the data transmission timer parameters When the timing of the data transmission timer does not exceed the preset time, cell reselection is not performed, and data transmission is performed in the current cell.
  • the data transmission cell reselection parameter further includes a service threshold
  • the cell reselection according to the data transmission cell reselection parameter includes: when the amount of data to be transmitted does not exceed the service threshold, Data transmission in the current cell.
  • the data transmission cell reselection parameter is indicated in a system message or an RRC release message or downlink control information issued by the current cell.
  • the data transmission cell reselection parameters indicated in the system message and the RRC release message shall prevail.
  • the data transmission cell reselection parameter includes a minimum data transmission threshold. If the current cell signal is higher than the threshold, data transmission is performed in the current cell or the frequency priority of the current cell is set to the highest.
  • the UE transmits data it further includes: determining whether to use the data transmission cell reselection parameter according to the service type or data volume of the transmitted data; if so, continue the acquisition of the data transmission cell reselection Parameter to perform cell reselection according to the data transmission cell reselection parameter.
  • the sending a network indication to the base station to notify the base station to obtain data transmission information includes: when the UE needs to be reselected from the current cell to the target cell, sending a first network indication to the base station of the current cell to notify the base station The base station of the current cell obtains data transmission information; or, after the UE is reselected from the current cell to the target cell, a second network indication is sent to the base station of the target cell to notify the base station of the target cell to obtain the data transmission information.
  • An embodiment of the present invention further provides a data transmission device, the device includes: a transmission reselection module, configured to obtain data transmission cell reselection parameters if the UE is transmitting data, so as to perform data transmission based on the data transmission cell reselection parameters Cell reselection; or a base station notification module, used to send a network indication to the base station to notify the base station to obtain data transmission information.
  • a transmission reselection module configured to obtain data transmission cell reselection parameters if the UE is transmitting data, so as to perform data transmission based on the data transmission cell reselection parameters Cell reselection
  • a base station notification module used to send a network indication to the base station to notify the base station to obtain data transmission information.
  • the embodiment of the present invention also provides a storage medium on which a computer program is stored, and when the computer program is executed by a processor, the steps of any one of the above-mentioned data transmission methods are implemented.
  • An embodiment of the present invention also provides a terminal, including a memory and a processor, the memory stores a computer program, and the processor implements the steps of any one of the above-mentioned data transmission methods when the computer program is executed.
  • An embodiment of the present invention provides a data transmission method.
  • the method includes: if a UE is transmitting data, acquiring data transmission cell reselection parameters to perform cell reselection according to the data transmission cell reselection parameters; or, to a base station Send a network indication to notify the base station to obtain data transmission information.
  • the UE when the UE is transmitting data, it can be specifically referred to as a non-connected UE, and the UE determines whether to perform cell reselection according to the data transmission cell reselection parameters, and the data transmission cell reselection
  • the parameter is to delay cell reselection by increasing the reselection threshold, and try to keep the UE in the current cell for data transmission.
  • the UE during data transmission can send a network indication to the base station of the current cell or the reselected cell, so that the UE is performing data transmission through the base station. If a cell reselection occurs during the data transmission, the corresponding base station can Complete this data transmission according to the acquired data transmission information.
  • the UE that is transmitting data an appropriate transmission time so that the UE can complete the data transmission in the current cell as much as possible; if the data transmission is not completed within the preset time, in order to avoid the signal quality of the current cell from being too poor and affecting the UE’s
  • the communication still allows it to determine whether to perform cell reselection according to other limited conditions of the existing cell reselection parameters.
  • the unconnected UE that is transmitting data can be determined based on the service dimension whether the unconnected UE that is transmitting data will reselect the cell when the cell reselection is triggered.
  • the conditions for using the data transmission cell reselection parameters are defined, and the conditions can be set according to the service type or data volume of the data to be transmitted.
  • the UE for data transmission selects the target cell through cell reselection, it can indicate to the base station of the target cell to perform data transmission before accessing the network of the target cell, so as to continue to transmit the unsuccessful data and avoid Cause data loss.
  • Fig. 1 is a schematic diagram of a CBRA random access method for UE in the prior art
  • Fig. 2 is a schematic diagram of another CBRA random access method for UE in the prior art
  • FIG. 3 is a schematic diagram of a CFRA random access method of a UE in the prior art
  • FIG. 4 is a schematic flowchart of a data transmission method according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a partial flow of a data transmission method according to an embodiment of the present invention.
  • Fig. 6 is a schematic structural diagram of a data transmission device according to an embodiment of the present invention.
  • the UE’s air interface has three states: IDLE and inactive. INACTIVE and CONNECTED are called (RRC_IDLE, RRC_INACTIVE, RRC_CONNECTED) in 3GPP NR, where RRC is the abbreviation for Radio Resource Control.
  • IDLE the UE is not connected to the base station, and only needs to periodically initiate location update, cell selection and reselection procedures, and receive paging.
  • the UE In the CONNECTED state, the UE is connected to the network of the base station, and the network will configure the radio bearer (RB for short) of the UE and the related configuration of the physical layer, and the network can perform uplink and downlink data scheduling for the UE.
  • the UE In the INACTIVE state, the UE does not need to notify the base station when it moves within a certain RAN-Based Notification Area (RAN-Based Notification Area, referred to as RNA; where RAN is the abbreviation of Radio Access Network).
  • RAN-Based Notification Area referred to as RNA; where RAN is the abbreviation of Radio Access Network.
  • Certain configurations will be retained (currently the UE will retain the Packet Data Convergence Protocol (PDCP), Service Data Adaptation Protocol (SDAP) and other configurations and the original serving cell, that is, the primary cell (Primary Cell).
  • PDCP Packet Data Convergence Protocol
  • SDAP Service Data Adaptation Protocol
  • the UE needs to initiate data transmission in the non-CONNECTED state (that is, the IDLE state and the INACTIVE state), it needs to migrate to the CONNECTED state along with the access process before data transmission can be performed.
  • the UE when the UE reselects the mobile cell to another cell when the UE is in the non-CONNECTED state, the UE is required to perform a random access procedure to request resources.
  • the random access performed by the UE is mainly divided into two access methods: Contention-Based Random Access (CBRA) and Contention-Free Random Access (CFRA).
  • CBRA Contention-Based Random Access
  • CFRA Contention-Free Random Access
  • FIG. 1 is a schematic diagram of a CBRA random access method of a UE in the prior art. This method can include the following steps:
  • Step 1 The UE selects an SSB or CSI-RS from the synchronization signal block (Synchronization Signal Block, referred to as SSB) or Channel State Information Reference Signal (Channel State Information Reference Signal, referred to as CSI-RS) that meets the conditions, and then selects a preamble (preamble), sending a random access preamble sequence (ie MSG1 shown in Figure 1) by allowing the timing of the initiated physical random access channel or time-frequency resource (Physical Random Access Channel Occasion, RO or PRACH Occasion for short);
  • SSB Synchronization Signal Block
  • CSI-RS Channel State Information Reference Signal
  • Step 2 The UE receives a random access response (Random Access Response, RAR) (ie MSG2 shown in Figure 1) sent by the network, and the UE detects the random access radio network identity (Random Access Radio Network Temporary Identity, abbreviated as MSG2).
  • RAR Random Access Response
  • MSG2 Random Access Radio Network Temporary Identity
  • RA-RNTI scrambled Physical Downlink Control Channel (PDCCH) receives random access response (Random Access Response, abbreviated as RAR)
  • RAR contains timing advance command (Timing advance command), which carries timing advance (Timing advance, abbreviated as TA) information
  • uplink grant (Uplink grant, abbreviated as UL grant) carries the scheduling information of MSG3 (shown in Figure 1) sent by the UE, and the MSG2 contains the temporary scheduling information allocated by the base station to the UE.
  • Cell radio network temporary identification Temporary C-RNTI, TC-RNTI for short
  • the TC-RNTI will be upgraded to C-RNTI
  • C-RNTI will be the cell Short for Cell-Radio Network Temporary Identifier, TC-RNTI is used by UE to receive MSG4.
  • multiple UEs may choose the same RO and preamble to initiate a random access process, and then an access conflict occurs. Therefore, the following steps 3 and 4 can be used to resolve the conflict;
  • Step 3 The UE uses the uplink authorization received in MSG2 to send MSG3.
  • the sent MSG3 may include: Medium Access Control Control Element (MAC Control Element or MAC CE) of the C-RNTI, and if there is space, a buffer status report can be sent ( Buffer Status Report, BSR for short) and other information.
  • MAC Control Element or MAC CE Medium Access Control Control Element
  • the MSG3 sent by the UE may include: Radio Resource Control (RRC) Common Control Channel (CCCH)
  • RRC Radio Resource Control
  • CCCH Common Control Channel
  • the message may specifically include a message such as an RRC Setup Request (Setup Request) or an RRC Resume Request (Resume Request), and part of the information carried therein may be used as an identity (ID for short) of the UE for conflict resolution.
  • Step 4 If there is a C-RNTI UE, the UE receives the scheduling data (ie MSG4 in Figure 1) sent by the base station (the data is the PDCCH scrambled with C-RNTI), and the scheduling data is received by the specific UE. If the UE receives the information, it is considered that the conflict resolution is successful, the UE performs the random access procedure successfully, and the UE turns to the CONNECTED state; if the UE does not receive the scheduling data from the base station within a certain period of time, it is considered that the conflict resolution has failed. If there is no C-RNTI UE, the UE uses the TC-RNTI received by MSG3 to receive scheduling data. If the UE receives the scheduling data carrying the Contention Resolution Identity MAC CE, it is considered that the conflict resolution is successful.
  • Figure 1 shows another CBRA random access for UE in the prior art. Schematic diagram of the way. This method can include the following steps:
  • MSGA contains the information of MSG1 and MSG3 in Figure 1, that is, the preamble sent on the PRACH and the payload sent on the Physical Uplink Shared Channel (PUSCH) can also be used. It is called PUSCH effective timing or time-frequency resource (PUSCH occasion, PO for short).
  • MSGB contains MSG2 and MSG4 information. If the network only receives the preamble sent by the UE, it will reply to the MAC RAR of the four-step random access procedure, and the UE will fall back to the four-step procedure in Figure 1. If a UE in a non-CONNECTED state needs to send data, it must first perform a state transition and switch to the CONNECTED state. Therefore, MSGA only contains Radio Resource Control (RRC) messages, and the transmitted data needs to be completed after the random access process is completed. To send.
  • RRC Radio Resource Control
  • the mobile originated (MO for short) scenario is targeted, where the MO scenario is the scenario where the UE needs to perform data transmission.
  • the UE sends the data to be transmitted in the non-CONNECTED state.
  • the MSG3 or MSGA sent by the UE may also carry the data to be sent, thereby becoming Early Data Transmission (EDT).
  • EDT Early Data Transmission
  • the UE can also send data directly without sending the preamble.
  • the network when the network pre-configures a dedicated pre-configured uplink resource (Pre-configured Uplink Resource, referred to as PUR) or configured grant (referred to as CG) for the UE, the UE that uses the resource to send has a valid TA.
  • PUR Pre-configured Uplink Resource
  • CG configured grant
  • Figure 3 is a schematic diagram of a UE’s CFRA random access mode in the prior art; in the CFRA access mode, the base station (or called Network) configure dedicated resources (mainly time-frequency resources and code resources for initiating the preamble, which can be indicated by a code index (ra-Preamble Index)), that is, the base station sends dedicated resource configuration information to the UE to be accessed ( Figure 3 (Shown), the UE sends the random access preamble (Random Access Preamble) shown in Figure 3 to the network, and when it receives a random access response (Random Access Response) that characterizes the successful access, the random access is successful .
  • dedicated resources mainly time-frequency resources and code resources for initiating the preamble, which can be indicated by a code index (ra-Preamble Index)
  • the base station sends dedicated resource configuration information to the UE to be accessed ( Figure 3 (Shown)
  • the UE sends the random access preamble (Random Access Preamble) shown in
  • the data transmission of the UE described in Figures 1 to 3 may include small packet transmission, which is mainly determined based on network configuration, such as when the amount of data that the UE needs to send is less than a certain threshold, or the delay requirement and transmission period corresponding to the transmitted data, etc. Characteristic, the network will configure the UE to use small packet transmission.
  • an embodiment of the present invention provides a data transmission method during cell reselection. Referring to FIG. 4, the method includes the following steps:
  • Step S401 If the UE is transmitting data, acquire data transmission cell reselection parameters to perform cell reselection according to the data transmission cell reselection parameters; or
  • Step S402 Send a network indication to the base station to notify the base station to obtain data transmission information.
  • the UE in order to obtain better service quality, the UE can connect to a cell with better signal quality through cell reselection when the signal quality of the current cell is poor. However, if a cell reselection occurs, the UE is connected to another cell. In one cell, problems such as interruption of data transmission may occur. When the UE is in a disconnected state, it is necessary to determine whether the UE is performing data transmission. If so, for the continuity of data transmission, try to keep the UE connected to the current cell and complete the data transmission before performing cell reselection, that is, the above step S401 And S402.
  • the cell reselection parameter is a parameter issued to the UE by the base station of the current cell and used to determine whether the UE reselects to a new cell when the UE detects poor signal quality.
  • the data transmission cell reselection parameters are the parameters obtained by adjusting the cell reselection parameters; the data transmission cell reselection parameters can be used to instruct the UE to determine whether to execute the cell according to the parameters when the UE is in a disconnected state and when transmitting data.
  • the reselection threshold of the reselected cell reselection parameter may be higher than the reselection threshold of the existing cell reselection parameter, so that the UE performs data transmission in the current cell as much as possible to avoid interruption of data transmission due to cell reselection.
  • the reselection threshold refers to a threshold used in cell reselection parameters to indicate whether to perform cell reselection, such as the priority of each cell, multiple reselection measurement threshold parameters, and so on.
  • the data transmission cell reselection parameter may be indicated in a message sent by the base station to the UE.
  • the data transmission cell reselection parameter may not be set, so that the UE that is transmitting data sends a network indication to the base station of the cell to notify the base station that the UE is transmitting data. If the UE undergoes cell reselection, it includes the cell before the reselection, that is, the current cell, and the cell after the reselection, that is, the target cell.
  • the UE can send a network indication to the base station of the current cell to inform the base station that the UE is about to perform cell reselection, and data transmission may be interrupted.
  • the base station of the current cell can obtain the data transmission information before the cell reselection, such as the transmission progress, etc. .
  • the UE may also send a network indication to the base station of the target cell.
  • the base station of the target cell obtains data information of the UE in the current cell, such as transmission progress.
  • the UE when the UE is transmitting data, it can be specifically referred to as a non-connected UE.
  • the UE determines whether to perform cell reselection according to the data transmission cell reselection parameter.
  • the data transmission cell reselection parameter is Delay cell reselection by increasing the reselection threshold, and try to keep the UE in the current cell for data transmission.
  • the UE during data transmission can send a network indication to the base station of the current cell or the reselected cell, so that the UE is performing data transmission through the base station. If a cell reselection occurs during the data transmission, the corresponding base station can Complete this data transmission according to the acquired data transmission information.
  • the UE when it performs cell reselection according to the data transmission cell reselection parameters, it executes raising the priority of the current cell, setting the frequency priority of the current cell to the highest, and adjusting the cell At least one operation in the cell reselection threshold parameter in the reselection parameter.
  • the basis for successful cell selection should satisfy the S criterion.
  • the S criterion is evaluated based on the received power (Srxlev) in the cell search and the received signal quality (Squal) in the cell search, that is, based on the reference signal receiving power (Reference Signal Receiving Power, abbreviated as "Reference Signal Receiving Power”).
  • RSRP Reference Signal Receiving Power
  • RSRQ Reference Signal Receiving Quality, Reference Signal Receiving Quality
  • Cell reselection is evaluated according to the H criterion and R criterion, and the H criterion or R criterion is adopted according to whether the cell is configured with a hierarchical cell structure (HCS), and the H criterion and R criterion
  • the criterion is calculated by the signal quality (Qmeas) measured by the UE and the parameters of the network. This is obtained by the configuration in the system message. It is reselected to the best cell after sorting according to the H criterion and the R criterion.
  • the R criterion is mainly used to Cell sorting.
  • Priority of cell reselection can be reflected in the selection process or H, R calculation.
  • an absolute level of cell reselection is introduced, that is, it has different priorities for frequency points or different RATs. , Reflected by absolute priority.
  • Triggering conditions for reselection The system messages of the cell generally configure the corresponding thresholds for triggering different modes of measurement, that is, the measurement of a mode reselection is triggered when the signal of the cell measured by the UE is lower than a certain threshold.
  • a certain threshold may not exist, which means that the evaluation of cell reselection is always performed.
  • the UE determines whether to perform cell reselection according to the measured priority of each candidate cell and the cell reselection threshold parameters.
  • the specific reselection method standards refer to the above-mentioned S criterion, H criterion and R criterion.
  • some parameters in the cell reselection parameters can be adjusted. The adjustment here refers to the increase or decrease of the relevant threshold, or Some parameters are added or deleted to achieve the purpose of making the current cell the preferred cell in the cell reselection and not performing cell reselection, that is, increasing the cell reselection threshold. For example, increase the priority of the current cell, set the frequency priority of the current cell to the highest, and adjust one or more of the cell reselection threshold parameters in the cell reselection parameters.
  • the data transmission cell reselection parameter is obtained after adjusting the cell reselection parameter, and the adjustment includes: increasing the current cell triggering the same-frequency measurement threshold, and increasing the current cell triggering At least one of performing inter-frequency measurement threshold and adjusting the cell offset of the current cell.
  • the cell reselection threshold parameters include the same frequency reselection threshold and the inter-frequency reselection threshold. Specifically, it includes the same-frequency measurement threshold or the inter-frequency measurement threshold. It can also include the cell offset of the current cell (S criterion or R The value of Qoffsettemp in the criterion, which is indicated by the base station).
  • the adjustment of the cell reselection threshold parameters can include adjustments to one or more of the three parameters to delay the triggering of intra-frequency or inter-frequency measurement, or try to make the current cell rank first in the cell sorting process to improve The effect of the possibility of the UE camping on the current cell.
  • the data transmission cell reselection parameters include data transmission timer parameters. Please continue to refer to FIG. 4.
  • performing cell reselection according to the data transmission cell reselection parameters includes: The parameter of the data transmission timer starts the data transmission timer; when the timing of the data transmission timer does not exceed the preset time, cell reselection is not performed, and data transmission is performed in the current cell.
  • the data transmission cell reselection parameters may also include data transmission timer parameters, which are used to enable the UE to start the timer locally in the UE according to the parameters.
  • the parameters of the data transmission timer may include the threshold value of the timer, that is, the preset time.
  • the data transmission timer is started locally in the UE. If the timing time does not exceed the preset time, cell reselection is not performed and data transmission is performed in the current cell; if the timing time exceeds the preset time, then Determine whether to perform cell reselection according to cell reselection parameters or data transmission cell reselection parameters.
  • a period of transmission time is given to the UE that is transmitting data, so that the UE can complete data transmission in the current cell as much as possible; if the data transmission is not completed within the preset time, in order to avoid the poor signal quality of the current cell and affect the UE
  • the communication still allows it to determine whether to perform cell reselection according to other limiting conditions of the data transmission cell reselection parameter.
  • the data transmission cell reselection parameters also include service thresholds. Please continue to refer to FIG. 4.
  • performing cell reselection according to the data transmission cell reselection parameters includes: When the amount of data does not exceed the service threshold, data transmission is performed in the current cell. It further includes: transmitting data at the UE and cell reselection is required, judging whether the amount of data to be transmitted exceeds a threshold, and if it does not exceed the threshold, continuing data transmission in the current cell.
  • the business threshold is a threshold used to set business-related dimensions such as the business volume of the data to be transmitted.
  • the business volume can refer to the data volume, or the volume can be obtained by performing statistics on the transmitted data according to business requirements.
  • the data transmission cell reselection parameter is indicated in a system message or an RRC message or downlink control information issued by the current cell.
  • the radio resource control (Radio Resource Control, RRC for short) message may be an RRC release message or other RRC messages, where the RRC release message is a message sent by the network to the UE to release the UE's RRC connection.
  • the system message or the RRC message may carry specific data transmission cell reselection parameter information, and may further be used to instruct the UE to use the parameter.
  • Downlink Control Information (DCI) is information used by the network to schedule UE data transmission, and can be used to instruct the UE to use data transmission cell reselection parameters obtained in system messages or RRC messages.
  • the data transmission cell reselection parameters indicated in the system message and the RRC release message shall prevail.
  • the system message is broadcast and sent by the cell base station to each connected UE, and the RRC release message is sent by the base station to the UE to be released.
  • the data transmission cell reselection parameters can be indicated in the system message or RRC release message sent by the current cell to the UE. If the cell reselection parameters indicated by the two are transmitted in data, the indicated in the RRC release message shall prevail.
  • the data transmission cell reselection parameter may be indicated during the data transmission process between the base station and the UE, and then may be sent to the UE along with the transmitted data.
  • the data transmission cell reselection parameter includes a minimum data transmission threshold. If the signal of the current cell is higher than the threshold, data transmission is performed in the current cell or the frequency of the current cell is set to the highest priority.
  • FIG. 5 is a data transmission method in an embodiment. Schematic diagram of part of the process, in which:
  • Step S501 Determine whether to use the data transmission cell reselection parameter according to the service type or data volume of the transmitted data.
  • Step S502 if yes, continue the acquisition of the data transmission cell reselection parameter to perform cell reselection according to the data transmission cell reselection parameter.
  • the conditions for using the data transmission cell reselection parameters can be set, and the conditions can be set according to the type of service and the amount of data transmitted. For example, when the priority corresponding to the service type is higher and the amount of transmitted data is small, the data transmission cell reselection parameter is used. For example, when the threshold value of the business volume is exceeded, it is determined that the condition of using the data transmission cell reselection parameter is not satisfied; otherwise, it is satisfied. For another example, you can set priority information for data transmission, such as the priority of a logical channel (Logical Channel, LCH for short), and only enable data transmission cell reselection parameters for data transmission on channels with higher priority. Specifically, according to the data to be transmitted The LCH of the data is judged whether it is included in the priority information of the transmission data, and if it is, the data transmission cell reselection parameter is activated.
  • LCH Logical Channel
  • step S401 in FIG. 4 When the UE determines according to step S401 in FIG. 4 that when transmitting data, the UE determines whether to use the data transmission cell reselection parameter according to the condition of using the data transmission cell reselection parameter. If the condition of using data transmission cell reselection parameters is met, continue to perform step S502, that is, the second half of step S401 in FIG. 4;
  • Step S503 may also be included. If not, cell reselection parameters are acquired, and cell reselection is performed according to the cell reselection parameters.
  • step S503 is executed, that is, it is executed according to the existing cell reselection procedure. That is, the base station can simultaneously configure two sets of parameters of the cell reselection parameters in the prior art and the data transmission cell reselection parameters in the present invention for the UE, and the UE selects which set of parameters to use according to its own situation.
  • the conditions for using the data transmission cell reselection parameters are further limited, and the conditions can be set according to the service type or data volume of the data to be transmitted.
  • sending a network indication to the base station to notify the base station to obtain data transmission information includes: when the UE needs to reselect from the current cell to the target cell, The base station of the current cell sends a first network indication to notify the base station of the current cell to obtain data transmission information; or, when the UE is reselected from the current cell to the target cell, sends a second network instruction to the base station of the target cell The network instructs to notify the base station of the target cell to obtain data transmission information.
  • the UE may send a first network indication to the base station of the current cell to inform the base station of the current cell that the UE needs to perform cell reselection, so that the base station of the current cell obtains the data transmission progress of the UE when the cell reselection occurs, and determines Target cell, triggers the UE context interaction or migration between the current cell base station and the target cell base station, data forwarding, including unsuccessful or untransmitted data transfer, so that the UE can continue unfinished data in the target cell after cell reselection transmission.
  • the UE can send a second network indication to the base station of the target cell to inform the base station of the target cell that the UE is in The cell is performing data transmission before, so that the base station of the target cell obtains the corresponding data transmission message, so as to cooperate with the UE to complete the data transmission.
  • the second network indication may be indicated in a random access channel (Random Access Channel, RACH for short) process initiated by the UE.
  • RACH Random Access Channel
  • the base station of the target cell may notify the base station of the current cell to obtain the context of the UE's data transmission and/or perform data forwarding, and forward the data to be transmitted to the UE or that the UE has not successfully transmitted to The base station of the target cell continues to send to the UE.
  • the UE notifies the base station of the current cell before performing cell reselection to trigger a context relocation (context relocation) or data forwarding (data forwarding) process, for example, the base station of the current cell may be notified through an RRC message or MAC CE indication.
  • preamble and PO (PUSCH occasion) or PUR (Preconfigured Uplink Resource) resources of the UE in the target cell can be configured to speed up access.
  • the UE for data transmission after the UE for data transmission selects the target cell through cell reselection, when accessing the network of the target cell, it can instruct the base station of the target cell to perform data transmission before continuing to transmit the unsuccessful data. , To avoid data loss.
  • the present invention also provides a data transmission device, which may include:
  • the transmission reselection module 601 is configured to obtain data transmission cell reselection parameters if the UE is transmitting data, so as to perform cell reselection according to the data transmission cell reselection parameters; or
  • the base station notification module 602 is configured to send a network indication to the base station to notify the base station to obtain data transmission information.
  • the transmission reselection module 601 is further configured to increase the priority of the current cell and prioritize the frequency of the current cell when the UE performs cell reselection according to the data transmission cell reselection parameters.
  • the level is set to the highest, and at least one operation of adjusting the cell reselection threshold parameter in the cell reselection parameter.
  • the data transmission cell reselection parameter is obtained after adjusting the cell reselection parameter, and the adjustment includes: increasing the threshold for the current cell to trigger intra-frequency measurement, and increasing the current cell to trigger different At least one of the threshold of the frequency measurement and the cell offset of the current cell.
  • the data transmission cell reselection parameters include data transmission timer parameters
  • the transmission reselection module 601 includes:
  • the timer starting unit is used to start the data transmission timer according to the parameters of the data transmission timer.
  • the current cell transmission unit is configured to perform data transmission in the current cell without performing cell reselection when the timing of the data transmission timer does not exceed the preset time.
  • the data transmission cell reselection parameter further includes a service threshold
  • the transmission reselection module 601 is further configured to perform data transmission in the current cell when the transmitted data does not exceed the service threshold.
  • the data transmission cell reselection parameter is indicated in a system message or an RRC release message or downlink control information issued by the current cell.
  • the data transmission cell reselection parameters indicated in the system message and the RRC release message shall prevail.
  • the data transmission cell reselection parameter includes a minimum data transmission threshold. If the current cell signal is higher than the threshold, data transmission is performed in the current cell or the frequency priority of the current cell is set to the highest.
  • the transmission reselection module 601 in the data transmission device of FIG. 6 may include:
  • the transmission judging unit is used to detect whether the UE is transmitting data
  • the parameter selection unit is configured to determine whether to use the data transmission cell reselection parameter according to the service type or data volume of the transmitted data;
  • the continuing execution unit is configured to, if yes, continue the acquisition of data transmission cell reselection parameters and perform cell reselection according to the data transmission cell reselection parameters.
  • the base station notification module 602 in the data transmission apparatus of FIG. 6 includes:
  • the current base station notification unit is configured to send a first network indication to the base station of the current cell to notify the base station of the current cell to obtain data transmission information when the UE needs to reselect to the target cell from the current cell; or
  • the target base station notification unit is configured to send a second network indication to the base station of the target cell to notify the base station of the target cell to obtain data transmission information after the UE is reselected to the target cell from the current cell.
  • the embodiment of the present invention also discloses a storage medium on which computer instructions are stored.
  • the storage medium may include a computer-readable storage medium such as a non-volatile memory or a non-transitory memory.
  • the storage medium may include ROM, RAM, magnetic disk or optical disk, etc.
  • an embodiment of the present invention also discloses a terminal, including a memory and a processor, the memory stores computer instructions that can run on the processor, and the processor executes the above-mentioned embodiments shown in FIGS. 4 and 5 when the computer instructions are executed.
  • the terminal may refer to terminals such as mobile phones and computers.
  • This technical solution is also applicable to different network architectures, including but not limited to relay network architecture, dual link architecture, Vehicle-to-Everything (vehicle-to-everything communication) architecture and other architectures.
  • the base station (BS for short) in the embodiments of the present application may also be referred to as base station equipment, and is a device deployed on a radio access network (RAN) to provide wireless communication functions.
  • the equipment that provides the base station function in the 2G network includes a base transceiver station (English: base transceiver station, referred to as BTS), the equipment that provides the base station function in the 3G network includes the NodeB (NodeB), and the equipment that provides the base station function in the 4G network Including evolved NodeB (eNB), in wireless local area networks (WLAN), the equipment that provides base station functions is access point (AP), 5G New Radio (New Radio) , Referred to as NR) in the gNB that provides base station functions, and the evolving Node B (ng-eNB), where the gNB and the terminal use NR technology for communication, and the ng-eNB and the terminal use E-UTRA (Evolved Universal Terrestrial Radio Access) technology for communication, both gNB and ng-eNB
  • the base station controller in the embodiments of the present application is a device for managing base stations, such as a base station controller (BSC) in a 2G network, and a radio network controller (RNC) in a 3G network. ), can also refer to the device that controls and manages the base station in the new communication system in the future.
  • BSC base station controller
  • RNC radio network controller
  • the network-side network in the embodiment of the present invention refers to a communication network that provides communication services for terminals, including base stations of the wireless access network, may also include base station controllers of the wireless access network, and may also include devices on the core network side.
  • the terminal in the embodiments of this application may refer to various forms of user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (mobile station, built-in MS), remote station, and remote station.
  • Terminal mobile equipment, user terminal, terminal equipment, wireless communication equipment, user agent or user device.
  • the terminal device can also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), Handheld devices with wireless communication functions, computing devices, or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in the future 5G network, or future evolution of the public land mobile communication network (Public Land Mobile Network, referred to as The terminal equipment in the PLMN) is not limited in the embodiment of the present application.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • the embodiment of this application defines the one-way communication link from the access network to the terminal as the downlink, the data transmitted on the downlink is the downlink data, and the transmission direction of the downlink data is called the downlink direction; and the one from the terminal to the access network
  • the unidirectional communication link is the uplink, the data transmitted on the uplink is the uplink data, and the transmission direction of the uplink data is called the uplink direction.
  • connection appearing in the embodiments of this application refers to various connection modes such as direct connection or indirect connection to realize communication between devices, which is not limited in the embodiments of this application.

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

Abstract

L'invention concerne un procédé et un appareil de transmission de données, ainsi qu'un support de stockage et un terminal. Le procédé consiste à : si un UE transmet des données, acquérir un paramètre de resélection de cellule de transmission de données pour effectuer une resélection de cellule en fonction du paramètre de resélection de cellule de transmission de données (S401) ; ou envoyer une indication de réseau à une station de base pour informer la station de base de l'acquisition d'informations de transmission de données (S402). Le procédé permet d'éviter une interruption de transmission de données provoquée par une resélection de cellule, ce qui améliore efficacement l'efficacité de transmission de données et évite la perte de données de transmission.
PCT/CN2021/074582 2020-02-20 2021-02-01 Procédé et appareil de transmission de données, support de stockage et terminal WO2021164528A1 (fr)

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