CN116170826A - Indication method and device for physical layer mobility beam failure recovery - Google Patents
Indication method and device for physical layer mobility beam failure recovery Download PDFInfo
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- CN116170826A CN116170826A CN202310095123.7A CN202310095123A CN116170826A CN 116170826 A CN116170826 A CN 116170826A CN 202310095123 A CN202310095123 A CN 202310095123A CN 116170826 A CN116170826 A CN 116170826A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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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
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- 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
- H04W36/305—Handover due to radio link failure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
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Abstract
The application discloses an indication method for physical layer mobility beam failure recovery, which comprises the following steps: determining first configuration information, wherein the first configuration information indicates information of 1 or more adjacent cells or adjacent cell groups; transmitting uplink control information in a serving cell, wherein the uplink control information comprises beam identifications meeting a first threshold and cell or cell group identifications where the beam identifications are located; in response to the uplink control information, the downlink control information in the serving cell is used to indicate that the selected beam is located in the serving cell or is handed over to a neighboring target cell. The application also includes an apparatus for implementing the method. The method and the device solve the problems of delay, interruption and overhead caused by the triggering of RRC reconfiguration by beam switching, and are particularly suitable for the scene of service cell change.
Description
Technical Field
The present disclosure relates to the field of wireless communications technologies, and in particular, to a method and apparatus for indicating failure recovery of a physical layer mobility beam.
Background
The NR version standardizes the beam failure recovery procedure for PCell and Pscell, when beam failure is detected, the terminal selects a new beam satisfying the threshold requirement and initiates non-contention random access on the random access channel (PRACH) resource managed by the new beam, after receiving the random access request, the base station determines the new beam and transmits a response message in a control set (core-BFR) dedicated for beam failure recovery, after receiving the response message, the terminal receives the downlink control channel PDCCH in the control set by the new beam and uses the beam of the latest random access channel as the transmission beam of the uplink control channel PUCCH until the terminal receives the RRC message reconfigured by the Transmission Configuration Index (TCI) or the MAC CE signaling activated by the TCI, and after completing the random access procedure, the terminal completes Beam Failure Recovery (BFR) in PCell. A beam failure recovery timer (beamfailurerecovery timer) is started when non-contention random access is performed, if timeout occurs but retransmission of Msg1 has not reached the maximum number, contention-based random access can still be continued, and if Msg1 reaches the maximum number of retransmissions first but RACH has not succeeded, the RRC layer is informed in a random access failure (RLF) manner so that the RRC layer performs a link recovery procedure after RLF.
In addition, if the terminal detects the beam failure of the secondary cell, the terminal sends BFR MAC CE to inform the network of which SCell has the beam failure, candidate beam SSB/CSI-RS information and the like, and after the network receives the MAC CE, the network can complete the BFR process by replying the UL grant or the inactive Scell corresponding to the MAC CE.
NR R18 release research and standardization is based on physical layer/MAC layer (L1/L2) mobility with the goal that a terminal can receive MAC CE or physical layer signaling to dynamically perform serving cell changes without triggering RRC reconfiguration (reconfiguration with synchronization) with the goal of reducing delay, overhead, and outage time.
Disclosure of Invention
The application provides an indication method and equipment for physical layer mobility beam failure recovery, which solve the problems of delay, interruption and overhead caused by beam switching triggering RRC reconfiguration, and are particularly suitable for a scene of service cell change.
In a first aspect, the present application proposes a method for indicating physical layer mobility beam failure recovery, including the following steps:
determining first configuration information, wherein the first configuration information indicates information of 1 or more adjacent cells or adjacent cell groups;
transmitting uplink control information in a serving cell, wherein the uplink control information comprises beam identifications meeting a first threshold and cell or cell group identifications where the beam identifications are located;
In response to the uplink control information, the downlink control information in the serving cell is used to indicate that the selected beam is located in the serving cell or is handed over to a neighboring target cell.
The method of the first aspect of the present application, for a network side device, comprises the following steps:
determining first configuration information, wherein the first configuration information indicates information of 1 or more adjacent cells or adjacent cell groups;
receiving uplink control information, wherein the uplink control information comprises beam identifications meeting a first threshold and cell or cell group identifications where the beam identifications are positioned;
and transmitting downlink control information, wherein the downlink control information is used for indicating that the selected wave beam is positioned in a service cell or is switched to an adjacent target cell.
The method of the first aspect of the present application, for a terminal side device, comprises the following steps:
determining first configuration information, wherein the first configuration information indicates information of 1 or more adjacent cells or adjacent cell groups;
transmitting uplink control information, wherein the uplink control information comprises beam identifications meeting a first threshold and cell or cell group identifications where the beam identifications are located;
and receiving downlink control information, wherein the downlink control information is used for indicating that the selected wave beam is positioned in a service cell or is switched to an adjacent target cell.
In any one embodiment of the first aspect of the present application, preferably, the uplink control information is carried on msg a or msg 3 in a random access procedure, or on an uplink MAC CE.
In any one embodiment of the first aspect of the present application, preferably, the downlink control information is further used to indicate a cell identifier and/or a cell group identifier of a target cell for handover.
In any embodiment of the first aspect of the present application, preferably, the downlink control information is carried by a physical layer downlink control channel, or a physical layer search space of the downlink control information is carried by a downlink control channel and/or a downlink data channel.
In any one embodiment of the first aspect of the present application, preferably, the downlink control information indicates that the selected beam is switched to an adjacent target cell; the downlink control information includes a BWP identifier of the target cell and/or TA information of the target cell.
In any one embodiment of the first aspect of the present application, preferably, the uplink control information includes a measured RS index and L1-RSRP of a beam of a neighboring cell.
In any embodiment of the first aspect of the present application, preferably, in response to the uplink control information, the network side device compares the reported RSRP difference value with a set second threshold value to determine that the selected beam is located in the serving cell or is switched to an adjacent target cell.
In any embodiment of the first aspect of the present application, preferably, the downlink control information includes TA information of a target cell, and the terminal side device directly sends the uplink information in the target cell without going through a random access procedure.
In any embodiment of the first aspect of the present application, preferably, in response to the downlink control information not including TA information of the target cell, or in response to the downlink control information not reaching the terminal side device within a set period of time, the terminal side device initiates random access in a neighboring cell or a neighboring cell group that satisfies a first threshold, and sends uplink control information in the neighboring cell or the neighboring cell group that satisfies the first threshold.
In any one embodiment of the first aspect of the present application, preferably, in response to the downlink control information indicating that the selected beam is located in the serving cell, the terminal side device switches to the selected beam after the first time delay; responding to the downlink control information to instruct switching to an adjacent target cell, and switching to the selected wave beam after a second time delay of the terminal side equipment; the first delay time is greater than the second delay time.
In a second aspect, the present application further proposes a network side device, configured to implement a method according to any one of the embodiments of the first aspect of the present application, where at least one module in the network side device is configured to at least one of the following functions: determining the first configuration information; transmitting the first configuration information; receiving the uplink control information; determining a beam identity satisfying a second threshold; determining whether the selected beam is located in a serving cell or switched to an adjacent target cell; and sending the downlink control information.
In a third aspect, the present application further proposes a terminal-side device, configured to implement a method according to any one of the embodiments of the first aspect of the present application, where at least one module in the network-side device is configured to at least one function of: receiving the first configuration information; determining the first configuration information; measuring signal quality of beams of the configured serving cell and 1 or more neighboring cells or cell groups; determining a beam identifier meeting a first threshold and a cell or cell group identifier where the beam identifier is located; transmitting the uplink control information; receiving the downlink control information; determining whether the selected beam is located in a serving cell or switched to an adjacent target cell; initiating random uplink access in the selected wave beam; and directly transmitting uplink data in the selected wave beam without a random uplink access process according to the TA of the target cell.
In a fourth aspect, the present application also proposes a communication device comprising: a memory, a processor and a computer program stored on the memory and executable on the processor, which when executed by the processor performs the steps of the method according to any one of the embodiments of the first aspect of the present application.
In a fifth aspect, the present application also proposes a computer-readable medium, on which a computer program is stored, which computer program, when being executed by a processor, implements the steps of the method according to any one of the embodiments of the first aspect of the present application.
In a sixth aspect, the present application further proposes a mobile communication system, which includes at least one network-side device according to any one embodiment of the present application and/or at least one terminal-side device according to any one embodiment of the present application.
The above-mentioned at least one technical scheme that this application embodiment adopted can reach following beneficial effect:
the invention designs a beam failure recovery indicating method of physical layer mobility, which considers the situation of detecting beam failure on the basis of L1/L2 mobility, and can obtain optimization in two aspects through reporting neighbor cell measurement information by a terminal and signaling design in beam failure recovery: on the one hand, if the new beam is associated with the target cell requiring the change of the serving cell, the terminal can change the main cell to the target cell and update the beam to the optimal beam, on the other hand, before the beam recovery fails, the beam recovery can be performed from the non-serving cell, that is, when the beam from the serving cell cannot be correctly received, the radio link failure does not need to be triggered directly, but a better beam of the non-serving cell is selected, so that the robustness of the connection can be significantly improved. The method is suitable for beam failure recovery of the terminal at the cell edge, can effectively realize the signaling of physical layer mobility switching and beam failure recovery, namely the terminal can directly change the service cell and the corresponding optimal beam in the beam failure recovery process, and can also carry out beam failure recovery from other adjacent cells when the beam recovery fails, thereby avoiding frequent radio link failure entering the RRC layer for link recovery.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:
FIG. 1 is a flow chart of an embodiment of the method of the present application;
fig. 2 is a schematic diagram of a handover to a target cell in a neighboring cell;
FIG. 3 is a schematic diagram of a handover to multiple target cells in a group of neighboring cells;
fig. 4 is a flowchart of an embodiment of a method for a network side device according to the present application;
fig. 5 is a flowchart of an embodiment of a method for a terminal side device according to the present application;
FIG. 6 is a schematic diagram of an embodiment of a network side device;
FIG. 7 is a schematic diagram of an embodiment of a terminal-side device;
fig. 8 is a schematic structural diagram of a network side device according to another embodiment of the present invention;
fig. 9 is a block diagram of a terminal-side device according to another embodiment of the present invention.
Detailed Description
For the purposes, technical solutions and advantages of the present application, the technical solutions of the present application will be clearly and completely described below with reference to specific embodiments of the present application and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
The following describes in detail the technical solutions provided by the embodiments of the present application with reference to the accompanying drawings.
FIG. 1 is a flow chart of an embodiment of the method of the present application.
The application provides an indication method for physical layer mobility beam failure recovery, which comprises the following steps 110-130:
The network side equipment sends the first configuration information, or the terminal receives the first configuration information and indicates the information of 1 or more adjacent cells or adjacent cell groups.
After detecting the beam failure, the terminal sends uplink control information in the service cell, wherein the uplink control information comprises a new beam meeting a first threshold condition and a cell identifier or a cell group identifier where the new beam is located.
In any one embodiment of the first aspect of the present application, preferably, the uplink control information is carried on msg a or msg 3 in a random access procedure, or on an uplink MAC CE.
In any one embodiment of the first aspect of the present application, preferably, the uplink control information includes a measured RS index and L1-RSRP of a beam of a neighboring cell.
After detecting the beam failure, the terminal reports the channel quality information of the measured multiple beams of the service cell and the neighbor cells to the base station, and the base station indicates the terminal to perform beam recovery on the service cell or change the service cell to the target cell according to the reported information to perform beam recovery.
In response to the uplink control information, the downlink control information in the serving cell is used to indicate that the selected beam is located in the serving cell or is handed over to an adjacent target cell, step 130.
In any one embodiment of the first aspect of the present application, preferably, the downlink control information is further used to indicate a cell identifier and/or a cell group identifier of a target cell for handover.
In any embodiment of the first aspect of the present application, preferably, the downlink control information is carried by a physical layer downlink control channel, or a physical layer search space of the downlink control information is carried by a downlink control channel and/or a downlink data channel.
In any one embodiment of the first aspect of the present application, preferably, the downlink control information indicates that the selected beam is switched to an adjacent target cell; the downlink control information includes a BWP identifier of the target cell and/or TA information of the target cell.
The terminal equipment receives the downlink control information (including the first downlink identification information and/or the second downlink identification information) and judges whether the new wave beam is positioned in the original service cell or the adjacent cell, and the wave beam failure recovery or the cell switching recovery is completed.
For example, downlink control information, which is used to indicate that the beam after the failure recovery of the terminal beam is one of a new beam for the serving cell and a new beam for switching to the target cell, and indicate the identity of switching to the target cell and/or cell group.
For example, the downlink control information includes identification information for indicating that the new beam is one of beam recovery for the serving cell and beam switching for the target cell. And when the bit information is 1 bit, the terminal is instructed to restore to the new wave beam of the service cell, and when the bit information is N bits, the terminal is instructed to be simultaneously switched to the target cell and the corresponding new wave beam.
For example, when the terminal receives the first downlink identification information to indicate that the beam after the beam switching failure recovery of the terminal is one of the modes for switching and beam switching of the target cell, the terminal receives the second downlink identification information to indicate the cell identification and/or the cell group identification of the switched target cell.
For another example, the second downlink identification information includes a BWP identification of the target cell and/or TA information of the target cell.
The first delay is defined as the delay of beam switching of the own serving cell, and the delay is used for switching a new beam of the own serving cell to the terminal. And defining the second time delay as the time delay of target cell switching and beam switching, and being used for switching the terminal to the target service cell and the beam state. The second delay is equal to the first delay + x symbols/slot.
If the terminal does not receive the downlink control information, the terminal initiates random access on the adjacent cell beam meeting the first threshold requirement, and beam failure recovery and cell switching are completed.
It should be noted that, the above steps are used for a network entity of a wireless communication system, and include a terminal side device, a network side device or other intermediate devices; the above steps may also be used for providing information processing service means for the network entity device; the above steps may also be applied to any apparatus, system, subsystem, circuit, chip or software entity that provides information receiving, transmitting, identifying, and processing for a terminal-side device or a network-side device.
Fig. 2 is a schematic diagram of a handover to a target cell in a neighboring cell. In the figure, each column is a cell group, wherein the primary serving cell before switching is Spcell# 0, the secondary serving cells are Scell# 1 and Scell# 2, when the indication bit information is 010, the primary serving cell is switched to Spcell# 3 after switching, and the secondary serving cell remains unchanged and is still Scell# 1 and Scell# 2.
For example, the first identifying information is N bits, and when the identifying information indicated by the base station to the terminal is information shown in the following table, the primary serving cell of the terminal is instructed to switch to a new beam corresponding to a new cell corresponding to the corresponding identifier (n=3 is an example), where the cell IDs may belong to the same cell group or different cell groups.
| Indication bit information | Handover to cell ID |
| 000 | PCI1 |
| 001 | PCI2 |
| 010 | PCI3 |
| 011 | PCI4 |
| 100 | PCI5 |
| 101 | PCI6 |
| 100 | PCI7 |
| 111 | PCI8 |
Fig. 3 is a schematic diagram of a handover to multiple target cells in a neighboring cell group. In the figure, the primary serving cell is sPcell# 0, the secondary serving cells are Scell# 1 and Scell# 2, wherein Spcell# 0, scell# 1 and Scell# 2 are cell group 1, and when receiving the handover indication bit information of 01, the primary serving cell is switched to target cell group 1 (CG#1), that is, the primary serving cell is switched to Spcell# 3, and the secondary serving cells are Scell# 4 and Scell# 5.
For example, the first identifying information is N bits, and when the identifying information indicated by the base station to the terminal is information shown in the following table, the terminal is instructed to switch to a new beam corresponding to the primary cell of the new cell group corresponding to the identifier (n=2 is an example), and other cells of the new cell group are secondary cells of the terminal.
| Indication bit information | Handover to cell group ID |
| 00 | |
| 01 | |
| 10 | |
| 11 | |
The carriers in the same column may be carriers deployed at the same base station location. When the UE moves to the gNB with cell # 3, the UE moves not only to the coverage of cell # 3 but also to the coverage of all CCs at the gNB (e.g., cell # 4 and cell # 5). Thus, cell group handover is required, cell # 3 becomes a new SpCell, and cell # 4 and cell # 5 become new scells.
Fig. 4 is a flowchart of an embodiment of a method for network side equipment according to the present application.
The method according to any one of the embodiments of the first aspect of the present application, for a network side device, includes the following steps 210 to 240:
The network side equipment determines and transmits the first configuration information.
Preferably, in response to the uplink control information, the network side device compares the reported RSRP difference value with a set second threshold value to determine that the selected beam is located in the serving cell or is switched to an adjacent target cell.
Specifically, defining an RSRP measurement threshold, comparing the RSRP difference value of the serving cell and the target cell reported by the terminal with the defined RSRP measurement threshold by the base station, when the RSRP difference value of the serving cell optimal beam and the target cell optimal beam is larger than the RSRP threshold, still using the optimal beam of the cell for beam recovery, and when the RSRP difference value of the serving cell optimal beam and the target cell optimal beam is smaller than the RSRP threshold, using the optimal beam of the target cell for beam recovery, thereby being used for judging whether to recover to the new beam of the serving cell or the new beam of the target cell by the base station.
For example, in the downlink control information, the first downlink identification information includes 1-bit identification information, which is used to indicate that the new beam is one of beam recovery for the serving cell and beam switching manners for the target cell; the second downlink identification information includes information for switching to the target cell.
For example, the first downlink identification information is 1 bit, when the bit information is "0", the terminal is instructed to restore to the new beam of the serving cell, and when the bit information is "1", the terminal is instructed to monitor the second downlink identification information, so that the terminal is simultaneously switched to the target cell and the corresponding new beam. Or the first downlink identification information is 1 bit, when the bit information is '0', the terminal is instructed to restore to the new wave beam of the service cell, and when the bit information is '1', the terminal is instructed to monitor the second downlink identification information, so that the terminal is simultaneously switched to the target cell group, and the main cell is switched to the corresponding new wave beam.
The content contained in the second downlink identification information includes the target cell identification and/or the identification of the target cell group. For example, the second downlink identification information is N bits, and indicates that the primary serving cell of the terminal is switched to a new beam corresponding to a new cell corresponding to the corresponding identification, where the cell IDs may belong to the same cell group or different cell groups; or the terminal is instructed to switch to a new wave beam corresponding to the main cell of the new cell group corresponding to the corresponding identifier, and other cells of the new cell group are switched to the auxiliary cell of the terminal.
Optionally, the second downlink identification information further includes a BWP identification for switching to the target cell and TA information of the target cell. The network configures a plurality of BWP for a terminal-side device (e.g., UE) mainly functions as terminal power saving, and the terminal can switch between normal BWP and power-saving BWP. The second downlink identification information includes BWP identification after beam switching, which can be used for the terminal to keep using BWP with the same attribute (normal and energy-saving) before switching in the target cell for switching, which is beneficial to the energy saving of the terminal. Considering that the network side can know the TA information of the neighbor cell, in order to facilitate the terminal to quickly synchronize the uplink to the target cell, the second downlink identification information contains the TA information of the target cell.
Fig. 5 is a flowchart of an embodiment of a method for a terminal-side device according to the present application.
The method according to any one embodiment of the first aspect of the present application, for a terminal side device, includes the following steps 310 to 340:
The terminal side equipment receives and determines the first configuration information.
After detecting that the beam fails, the terminal measures information such as signal quality of a serving cell and 1 or more neighbor beams configured by the base station, selects a new beam meeting a first threshold requirement and a corresponding cell/cell group, and reports first information to the base station, wherein the first information comprises the new beam information and the corresponding cell/cell group.
Specifically, the terminal detects a Spcell (including a Pcell and a sPcell), wherein the Pcell is a primary cell in a primary cell group, the sPcell is a primary cell in a secondary cell group, when the signal quality of a beam is lower than a threshold requirement, a beam failure indication is reported to the MAC layer, a timer is started and counted, and before the timer times out, the count reaches a maximum value, and the beam is considered to be failed.
The terminal measures information such as signal quality and the like on beams of 1 or more neighbor cells and a main service cell Spcell configured by the base station, preferably L1-RSRP, selects a new beam meeting a threshold requirement for beam failure recovery, and comprises first information for indicating the selected new beam information and a corresponding cell/cell group to the base station when random access is initiated. For example, the msg3 and msgA in the contention-based random access procedure include first information, or after the beam fails, the terminal is triggered to report the base station to request resources for reporting the first information, the base station allocates resources to the terminal for carrying the first information after receiving the request, the terminal sends the first information on the resources allocated by the base station, reports the measured RS index and the corresponding L1-RSRP for up to 1 or more non-serving cell beams, and the information may be carried on the MAC CE.
For example, the terminal receives first downlink identification information, where the first downlink identification information is used to indicate that the beam after beam failure recovery of the terminal is one of beam recovery for a serving cell and a manner for switching between target cells and beam switching, and an identification of the switched target cell or cell group.
For another example, the terminal receives second downlink identification information, where the second downlink identification information is used to indicate that the beam after beam failure recovery of the terminal is one of beam recovery for the serving cell and a manner for switching between the target cell and beam switching, and an identification of the switched target cell or cell group. The second information may also contain BWP identification of the target cell and/or TA information of the target cell.
For another example, the downlink control information is sent as a physical layer search space, and is carried by a downlink control channel and/or a downlink data channel.
In steps 320 to 330, specifically, if the method is a contention-based random access method, the terminal sends msg1, the base station issues an RA-RNTI scrambled RAR, the terminal carries first information in msg3 and sends the first information to the base station, and the base station sends msg4 in a downlink control channel, where msg4 carries the first control information, or the first control information and the second control information. In the case of a non-contention based two-step random access method, the terminal sends msA the uplink control information on a pre-configured random access resource, and the base station sends msgB scrambled by the C-RNTI (in a new downlink beam) in a physical layer downlink control channel in a control set CORESET (CORESET-BFR) dedicated for beam failure recovery, which is used to carry the first control information or the first control information and the second control information sent by the base station to the terminal.
If the information of the neighbor cell and the optimal beam thereof, which are reported by the triggering terminal MAC CE, is carried by the triggering terminal MAC CE, after the base station receives the MAC CE, the base station replies an UL grant corresponding to the MAC CE for carrying the first control information, or the first control information and the second control information.
In any embodiment of the first aspect of the present application, preferably, the downlink control information includes TA information of a target cell, and the terminal side device directly sends the uplink information in the target cell without going through a random access procedure.
In any embodiment of the first aspect of the present application, preferably, in response to the downlink control information not including TA information of the target cell, or in response to the downlink control information not reaching the terminal side device within a set period of time, the terminal side device initiates random access in a neighboring cell or a neighboring cell group that satisfies a first threshold, and sends uplink control information in the neighboring cell or the neighboring cell group that satisfies the first threshold.
For example, when the terminal does not receive the downlink control information within the set duration, the terminal selects an optimal beam on a neighboring cell or a main cell of a neighboring cell group meeting a first threshold to initiate random access, reports uplink control information to a neighboring cell base station, and the neighboring cell base station sends the downlink control information or the downlink control information and the second downlink identification information to the terminal for beam failure recovery and cell switching of the terminal.
Specifically, when the terminal sends msg1/msgA to the maximum retransmission times on the uplink random access resource of the serving cell, but RACH is still unsuccessful, the terminal may attempt to initiate random access on the random access resource of the selected neighboring cell or the main cell of the neighboring cell group meeting the first threshold, and complete beam failure recovery and cell handover after the second time delay according to the response information obtained from the neighboring cell.
Preferably, in response to the downlink control information indicating that the selected beam is located in the serving cell, the terminal side device switches to the selected beam after a first time delay; responding to the downlink control information to instruct switching to an adjacent target cell, and switching to the selected wave beam after a second time delay of the terminal side equipment; the first delay time is greater than the second delay time.
For example, when the first downlink identification information received by the terminal indicates that the beam after beam failure recovery is the beam for serving cell recovery, the terminal switches to the beam indicated by the first downlink identification information or the second downlink identification information of the serving cell after the second time delay, and when the first downlink identification information or the second downlink identification information received by the terminal indicates that the beam after beam failure recovery is the beam for serving cell recovery, the terminal switches to the beam indicated by the first downlink control signaling of the serving cell after the second time delay.
Specifically, the terminal receives the downlink control information (or the first downlink identification information and the second downlink identification information) carried by msg4 or msgB, and determines whether the indicated new beam is located in the serving cell or the target cell. When the indicated new wave beam is positioned in the service cell, after the first time delay, the terminal is switched to the wave beam indicated by the first downlink control signaling of the service cell to transmit and receive data, and the recovery of wave beam failure is completed.
When the terminal judges that the indicated new beam is the beam of the target cell, the terminal switches to the beam indicated by the first downlink identification information of the target serving cell after the second time delay, and meanwhile cell switching and beam failure recovery are completed. Specifically, if the terminal does not receive the TA information of the target cell indicated by the second information, the terminal initiates a random access process of the target cell, switches to the target cell, and if the terminal receives the TA information of the target cell indicated by the second information, the terminal directly initiates uplink transmission on the target cell.
Considering that the time delay of the terminal switching to the beam of the present serving cell is different from the time delay of the terminal switching to the beam of the target cell and that the former is smaller than the latter, it is preferable that the first time delay is smaller than the second time delay, that is, the second time delay is the first time + X slot/symbol number.
Fig. 6 is a schematic diagram of an embodiment of a network side device.
In a second aspect, an embodiment of the present application further proposes a network side device, configured to implement a method of any one embodiment of the present application, where at least one module in the network side device is configured to at least one function of: determining the first configuration information; transmitting the first configuration information; receiving the uplink control information; determining a beam identity satisfying a second threshold; determining whether the selected beam is located in a serving cell or switched to an adjacent target cell; and sending the downlink control information.
In order to implement the above technical solution, the network side device 400 provided in the present application includes a network sending module 401, a network determining module 402, and a network receiving module 403 that are connected to each other.
The network sending module is used for sending the first configuration information and the downlink control information.
The network determining module is configured to determine the first configuration information, determine a beam identifier that meets a second threshold, and determine that the selected beam is located in a serving cell or is switched to an adjacent target cell.
The network receiving module is used for uplink control information.
Specific methods for implementing the functions of the network sending module, the network determining module and the network receiving module are described in the embodiments of the methods of the present application, and are not described here again.
The network side device described in the present application may refer to a base station facility, a network side device or a server connected to a base station, or may be a system for providing services for the above devices, or may be any system, subsystem, module, circuit, chip or software running device for providing information receiving, sending, identifying and processing for the above devices.
Fig. 7 is a schematic diagram of an embodiment of a terminal-side apparatus.
In a third aspect, the present application further proposes a terminal-side device, configured to implement a method according to any one of the embodiments of the present application, where at least one module in the terminal-side device is configured to at least one of the following functions: receiving the first configuration information; determining the first configuration information; measuring signal quality of beams of the configured serving cell and 1 or more neighboring cells or cell groups; determining a beam identifier meeting a first threshold and a cell or cell group identifier where the beam identifier is located; transmitting the uplink control information; receiving the downlink control information; determining whether the selected beam is located in a serving cell or switched to an adjacent target cell; initiating random uplink access in the selected wave beam; and directly transmitting uplink data in the selected wave beam without a random uplink access process according to the TA of the target cell.
In order to implement the above technical solution, the terminal side device 500 provided in the present application includes a terminal sending module 501, a terminal determining module 502, and a terminal receiving module 503 that are connected to each other.
The terminal receiving module is used for receiving the first configuration information and the downlink control information.
The terminal determining module is used for determining first configuration information, intelligently determining a beam identifier meeting a first threshold and a cell or cell group identifier where the beam identifier is located according to the measured beam signals, and determining that a selected beam is located in a service cell or is switched to an adjacent target cell according to downlink control information; .
The terminal sending module is used for sending uplink control information, initiating random uplink access in the selected wave beam, or directly sending uplink data in the selected wave beam without the random uplink access process according to TA of the target cell.
Specific methods for implementing the functions of the terminal sending module, the terminal determining module and the terminal receiving module are described in the embodiments of the methods of the present application, and are not described herein.
The terminal side device may refer to a User Equipment (UE), a personal mobile terminal, an intelligent terminal, a mobile phone, a computer with a communication function, a system for providing services for the device, or any system, subsystem, module, circuit, chip or software running device for providing information receiving, sending, identifying and processing for the device.
Fig. 8 is a schematic structural diagram of a network side device according to another embodiment of the present invention in order to implement the communication device according to the fourth aspect of the present application. As shown, the network side device 600 includes a processor 601, a wireless interface 602, and a memory 603. Wherein the wireless interface may be a plurality of components, i.e. comprising a transmitter and a receiver, providing a means for communicating with various other apparatuses over a transmission medium. The wireless interface realizes the communication function with the terminal side equipment, processes wireless signals through a receiving and transmitting device, and the data carried by the signals are communicated with the memory or the processor through an internal bus structure. The memory 603 contains a computer program for executing any of the embodiments of the present application, which computer program runs or changes on the processor 601. When the memory, processor, wireless interface circuit are connected through a bus system. The bus system includes a data bus, a power bus, a control bus, and a status signal bus, which are not described here again.
Fig. 9 is a block diagram of a terminal-side device according to another embodiment of the present invention in order to realize the communication device of the fourth aspect of the present application. The terminal-side device 700 comprises at least one processor 701, a memory 702, a user interface 703 and at least one network interface 704. The various components in the terminal-side device 700 are coupled together by a bus system. Bus systems are used to enable connected communication between these components. The bus system includes a data bus, a power bus, a control bus, and a status signal bus.
The user interface 703 may include a display, keyboard, or pointing device, such as a mouse, trackball, touch pad, or touch screen, among others.
The memory 702 stores executable modules or data structures. The memory may store an operating system and application programs. The operating system includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, for implementing various basic services and processing hardware-based tasks. The application programs include various application programs such as a media player, a browser, etc. for implementing various application services.
In an embodiment of the present invention, the memory 702 contains a computer program that executes any of the embodiments of the present application, the computer program running or changing on the processor 701.
The memory 702 contains a computer readable storage medium, and the processor 701 reads the information in the memory 702 and performs the steps of the above method in combination with its hardware. In particular, the computer readable storage medium has stored thereon a computer program which, when executed by the processor 701, implements the steps of the method embodiments as described in any of the embodiments above.
The processor 701 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the methods of the present application may be performed by integrated logic circuitry in hardware or instructions in software in processor 701. The processor 701 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, an off-the-shelf programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component. The disclosed methods, steps, and logic blocks in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be embodied directly in the execution of a hardware decoding processor, or in the execution of a combination of hardware and software modules in a decoding processor.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. In one typical configuration, the device of the present application includes one or more processors (CPUs), an input/output user interface, a network interface, and memory.
Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Thus, in a fifth aspect, the present application also proposes a computer readable medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method according to any of the embodiments of the present application. For example, the memory 603, 702 of the present invention may include non-volatile memory in a computer-readable medium, random Access Memory (RAM) and/or non-volatile memory, etc., such as read-only memory (ROM) or flash RAM.
Based on the embodiments of the foregoing apparatus of the present application, in a fifth aspect, the present application further proposes a mobile communication system, which includes at least 1 embodiment of any one terminal side device of the present application and/or at least 1 embodiment of any one network side device of the present application.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
The "first" and "second" … … in the present application are intended to distinguish between a plurality of objects having the same name.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and changes may be made to the present application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. which are within the spirit and principles of the present application are intended to be included within the scope of the claims of the present application.
Claims (17)
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| CN202310095123.7A CN116170826A (en) | 2023-01-18 | 2023-01-18 | Indication method and device for physical layer mobility beam failure recovery |
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| CN202310095123.7A CN116170826A (en) | 2023-01-18 | 2023-01-18 | Indication method and device for physical layer mobility beam failure recovery |
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| CN110463264A (en) * | 2019-06-17 | 2019-11-15 | 北京小米移动软件有限公司 | random access indication method, device and storage medium |
| CN117793855A (en) * | 2022-09-21 | 2024-03-29 | 展讯通信（上海）有限公司 | Communication method and communication device |
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| CN110324908A (en) * | 2018-03-28 | 2019-10-11 | 维沃移动通信有限公司 | Wave beam fail processing method, terminal and the network equipment |
| CN110463264A (en) * | 2019-06-17 | 2019-11-15 | 北京小米移动软件有限公司 | random access indication method, device and storage medium |
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