WO2022027543A1 - Appareil et procédé de communication - Google Patents

Appareil et procédé de communication Download PDF

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Publication number
WO2022027543A1
WO2022027543A1 PCT/CN2020/107660 CN2020107660W WO2022027543A1 WO 2022027543 A1 WO2022027543 A1 WO 2022027543A1 CN 2020107660 W CN2020107660 W CN 2020107660W WO 2022027543 A1 WO2022027543 A1 WO 2022027543A1
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WIPO (PCT)
Prior art keywords
scg
information
indication
period
terminal device
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PCT/CN2020/107660
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English (en)
Chinese (zh)
Inventor
胡星星
张宏平
孙慧明
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华为技术有限公司
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Priority to PCT/CN2020/107660 priority Critical patent/WO2022027543A1/fr
Priority to CN202080104496.0A priority patent/CN116134864A/zh
Publication of WO2022027543A1 publication Critical patent/WO2022027543A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the embodiments of the present application relate to the field of communication technologies, and in particular, to a communication method and apparatus.
  • a terminal device when a terminal device does not need to use a secondary cell group (SCG) to provide communication services for itself, it can be temporarily suspended (suspended)
  • the SCG for example, suspends the configuration of the SCG and does not transmit data through the SCG, thereby reducing the power consumption of the terminal device and the network device.
  • the terminal device when the terminal device needs to use the SCG to provide communication services for itself, the terminal device can restore (restore) the configuration of the SCG, and can also perform data transmission through the SCG to meet the terminal device's demand for data transmission rate.
  • the terminal device may perform operations such as signal quality detection, there may still be unnecessary high energy consumption.
  • Embodiments of the present application provide a communication method and apparatus for reducing power consumption of a terminal device.
  • a communication method comprising: when a secondary cell group SCG of a terminal device is in a deactivated state, the terminal device obtains a first evaluation result of the link signal quality of the SCG according to a first evaluation period ; When the SCG is in an active state, the terminal device obtains the second evaluation result of the link signal quality of the SCG according to the second evaluation period; the terminal device obtains, according to the first evaluation result or the second evaluation result, Perform radio link monitoring or link recovery procedures on the SCG.
  • the terminal device evaluates the link signal quality of the SCG by using evaluation periods corresponding to the case of suspending the SCG and the case of resuming the SCG respectively.
  • the evaluation periods corresponding to different SCG states it is possible to take into account the The power consumption of the terminal equipment and the accuracy of the evaluation results, so that the wireless link monitoring or link recovery process can be performed more flexibly.
  • a longer evaluation period can be used; in the case of resuming the SCG, a shorter evaluation period can be used, so that the energy consumption of the terminal device in the suspended SCG state is lower than that of the non-SCG state. Power consumption in suspended SCG state.
  • the method further includes: the terminal device receives first indication information from a network device; the first indication information is used to indicate the first evaluation period; the network device is the The primary or secondary node of the end device.
  • the first evaluation period may be notified by the network device to the terminal device.
  • the present implementation can prevent the size of the evaluation period from being affected by parameters such as whether the cell under test is configured with DXR and the size of the DRX period. This prevents the terminal device from consuming unnecessary power.
  • the effect of controlling the size of the first evaluation period by the network device can also be achieved.
  • the method further includes: the terminal device receives first indication information from a network device; the first indication information is used to indicate a first scaling factor; the network device is the terminal device primary or secondary node. The terminal device determines the first evaluation period according to the third evaluation period and the first scaling factor.
  • the terminal device may determine the first evaluation period according to the first scaling factor from the network device, according to the third evaluation period and the first scaling factor (for example, scaling the third evaluation period according to the first scaling factor) , and then obtain the first evaluation period).
  • the present implementation can prevent the size of the evaluation period from being affected by parameters such as whether the cell under test is configured with DXR and the size of the DRX period. This prevents the terminal device from consuming unnecessary power.
  • the effect of controlling the size of the first evaluation period by the network device can also be achieved.
  • the first evaluation period is an evaluation period corresponding to a predetermined discontinuous reception DRX period.
  • the size of the evaluation period can be prevented from being affected by parameters such as whether the cell under test is configured with DXR and the size of the DRX period, thereby preventing the terminal The device consumes unnecessary power.
  • the method further includes: according to the first indication period, the physical layer of the terminal device reports indication information corresponding to the first evaluation result to the upper-layer protocol stack; or, according to the second indication period, The physical layer of the terminal device reports the indication information corresponding to the second evaluation result to the upper-layer protocol stack.
  • different indication periods can be selected according to the current state of the SCG of the terminal device (ie, the deactivated state or the activated state) to report indication information to the upper-layer protocol stack.
  • the first indication period is selected to report the indication information to the upper-layer protocol stack
  • the second indication period is selected to report the indication information to the upper-layer protocol stack.
  • the method further includes: the terminal device receives second indication information from a network device; the second indication information is used to indicate the first indication period; the network device is the The primary or secondary node of the end device.
  • the first indication period may be notified by the network device to the terminal device.
  • this implementation can avoid the influence of the size of the indication period by whether the measured cell is configured with parameters such as DXR and DRX period size. This prevents the terminal device from consuming unnecessary power.
  • the effect of controlling the size of the first indication period by the network device can also be achieved.
  • the method further includes: the terminal device receives second indication information from a network device; the second indication information is used to indicate a second scaling factor; the network device is the terminal device The primary node or secondary node; the terminal device determines the first indication period according to the third indication period and the second scaling factor.
  • the terminal device may determine the first indication period according to the second scaling factor from the network device, according to the third indication period and the second scaling factor (for example, scaling the third indication period according to the second scaling factor) , and then obtain the first indication period).
  • this implementation can avoid the influence of the size of the indication period by whether the measured cell is configured with parameters such as DXR and DRX period size. This prevents the terminal device from consuming unnecessary power.
  • the effect of controlling the size of the first indication period by the network device can also be achieved.
  • the first indication period is an indication period corresponding to a predetermined DRX period.
  • the size of the indication period can be prevented from being affected by parameters such as whether the cell under test is configured with DXR and the size of the DRX period, thereby preventing the terminal The device consumes unnecessary power.
  • the method further includes: when the SCG is in a deactivated state, the terminal device receives first information from the master node; the first information includes: activation transmission configuration indication TCI state information ; the activated TCI state information is used by the terminal equipment to receive the physical downlink control channel PDCCH of the SCG.
  • Obtaining, by the terminal device, a first evaluation result of the link signal quality of the SCG according to the first evaluation period includes: the terminal device, based on the reference signal corresponding to the activated TCI state information, obtains, according to the first evaluation period, the link signal quality of the SCG. The first evaluation result of the link signal quality of the SCG.
  • the active TCI state information can be sent to the terminal device by the master node sending the active TCI state information to the terminal device.
  • the terminal device can evaluate the link signal quality of the SCG according to the reference signal corresponding to the activated TCI status information, so as to prevent the terminal device from being unable to obtain the activated TCI status of the received PDCCH of the SCG, and thus unable to perform RLM or linking on the SCG. Problems with the road restoration process.
  • the first information is a first radio resource control RRC message
  • the first RRC message includes a second RRC message
  • the activated TCI state information is included in the second RRC message
  • the second RRC message is an RRC message from the secondary node.
  • the secondary node when the SCG of the terminal device is in a deactivated state, the secondary node can send the second RRC message to the master node, and the master node sends the first RRC message including the second RRC message to the terminal device, thereby activating the TCI. Status information is sent to the end device.
  • the master node since the master node does not need to parse the second RRC message, the effect of sending the activated TCI state information from the slave node to the terminal device can be achieved without occupying too many resources of the master node.
  • the first information is an RRC message or a MAC CE.
  • the master node can send the activated TCI status information to the terminal device by sending an RRC message or a MAC CE.
  • the first information further includes third indication information, where the third indication information is used to indicate that the activated TCI state information is the TCI state information of the SCG.
  • the terminal device can know whether the activated TCI state information included in the first information is the TCI state information of the MCG or the TCI state information of the SCG.
  • a communication method comprising: a network device sending first indication information to a terminal device; the first indication information is used to indicate a first evaluation period or a first scaling factor;
  • the network device is the primary node or the secondary node of the terminal device.
  • the first evaluation period is used to instruct the terminal device to obtain a first evaluation result according to the first evaluation period when the secondary cell group SCG is in a deactivated state; the first evaluation result is used to evaluate the SCG Perform wireless link monitoring or perform a link recovery process; the first scaling factor is used to instruct the terminal device to determine the first evaluation period according to the third evaluation period and the first scaling factor.
  • the method further includes: the network device sends second indication information to the terminal device; the second indication information is used to indicate the first indication period or the second scaling factor; wherein, The first indication period is used to instruct the terminal device to report the first evaluation result to the upper-layer protocol stack according to the first indication period; the second scaling factor is used to The terminal device is instructed to determine the first indication period according to the third indication period and the second scaling factor.
  • a communication method includes: a master node receives second information from a secondary node, the second information includes activation transmission configuration indication TCI status information; the activated TCI status information is used for the
  • the terminal equipment receives the physical downlink control channel PDCCH of the secondary cell group SCG of the secondary node; wherein the SCG is in a deactivated state; the primary node sends first information to the terminal equipment, the first information includes all
  • the active TCI status information is described above.
  • the second information is a second radio resource control RRC message
  • the first information is a first RRC message
  • the first RRC message includes the second RRC message
  • the first information is an RRC message or a medium access control element MAC CE.
  • the first information further includes third indication information, where the third indication information is used to indicate that the activated TCI state information is the TCI state information of the SCG.
  • a communication method comprising: a secondary node sending second information to a master node, where the second information includes activation transmission configuration indication TCI status information; the activated TCI status information is used for the terminal
  • the device receives the physical downlink control channel PDCCH of the secondary cell group SCG of the secondary node; wherein, the SCG is in a deactivated state.
  • the second information is an RRC message sent by the secondary node to the primary node, or the second information is an interface message between the secondary node and the primary node.
  • a communication method comprising: a terminal device fails to detect a beam beam of a first cell in a secondary cell group SCG; wherein the SCG is in a deactivated state; the first cell is the SCG The PSCell or the secondary cell SCell in the SCG; the terminal device initiates a random access procedure in the first part of the bandwidth BWP of the primary and secondary cell PSCell in the SCG.
  • the terminal device when the SCG is in the deactivated state, when the beam failure of the PSCell or the SCell is detected, the terminal device performs the random access procedure in the PSCell, so that the link recovery process to the PSCell or the SCell can be successfully completed. .
  • the first BWP is the initial BWP of the PSCell; the method further includes: the terminal device, after the random access procedure, switches from the first BWP to the PSCell's dormant dormant BWP.
  • the PSCell can be restored to the deactivated state, so as to save the power of the terminal device, and at the same time reduce the network side re-send the terminal device to enter the deactivated state. command, also reduces overhead.
  • the first BWP is the dormant BWP of the PSCell.
  • the terminal device when the SCG is in the deactivated state, when the beam failure of the PSCell or SCell is detected, the terminal device can initiate a random access procedure in the dormant BWP of the PSCell to restore the link of the PSCell or SCell. can be successfully completed.
  • the method further includes: after the random access procedure is successful, the terminal device sends a first medium access control element MAC to the secondary node CE; the first MAC CE, used to indicate the beam failure of the first cell.
  • the terminal device sends the first medium access control element MAC CE to the secondary node, so that the link recovery process to the first cell can be successfully completed.
  • a communication method comprising: when the SCG is in a deactivated state, the terminal device sends fourth indication information to the secondary node through the master node; the fourth indication information is used to indicate the SCG in the SCG The beam beam of the first cell fails; the first cell is the PSCell or the secondary cell SCell in the SCG.
  • the terminal device when the SCG is in the deactivated state, can notify the secondary node of the failure of the beam beam of the first cell in the SCG by sending the fourth indication information to the secondary node through the primary node. This avoids the problem that the terminal equipment cannot notify the secondary node of the beam beam failure of the first cell because the SCG is in a deactivated state.
  • the fourth indication information is an RRC message, or the fourth indication information is a MAC CE.
  • the terminal device can notify the secondary node of the failure of the beam beam of the first cell in the SCG by sending an RRC message or a MAC CE from the primary node to the secondary node.
  • a communication method comprising: a secondary node of a terminal device receiving a fourth indication message from a master node of the terminal device, where the fourth indication message is used to indicate the first indication message in the secondary cell group SCG Beam beam failure for a cell.
  • the fourth indication information is an RRC message, or the fourth indication information is a MAC CE.
  • a communication device in an eighth aspect, includes: a processing unit, configured to obtain a first evaluation result of the link signal quality of the SCG according to a first evaluation period when the secondary cell group SCG of the terminal device is in a deactivated state; When the SCG is in the active state, obtain a second evaluation result of the link signal quality of the SCG according to the second evaluation period; the processing unit is further configured to perform wireless radio on the SCG according to the first evaluation result or the second evaluation result. Link monitoring or performing link recovery procedures.
  • the communication apparatus further includes: a receiving unit, configured to receive first indication information from a network device; the first indication information is used to indicate the first evaluation period; the network device is The primary node or secondary node of the terminal device.
  • the communication apparatus further includes: a receiving unit, configured to receive first indication information from a network device; the first indication information is used to indicate a first scaling factor; the network device is the The master node or the slave node of the terminal device; the processing unit further determines the first evaluation period according to the third evaluation period and the first scaling factor.
  • the first evaluation period is an evaluation period corresponding to a predetermined discontinuous reception DRX period.
  • the processing unit further enables the physical layer of the terminal device to report the indication information corresponding to the first evaluation result to the upper-layer protocol stack according to the first indication period, or, according to the second indication period, The physical layer of the terminal device is made to report the indication information corresponding to the second evaluation result to the upper-layer protocol stack.
  • the receiving unit is configured to receive second indication information from a network device; the second indication information is used to indicate the first indication period; the network device is the master of the terminal device node or secondary node.
  • the receiving unit is configured to receive second indication information from a network device; the second indication information is used to indicate a second scaling factor; the network device is the master node of the terminal device or Secondary node.
  • the processing unit is further configured to determine the first indication period according to the third indication period and the second scaling factor.
  • the first indication period is an indication period corresponding to a predetermined DRX period.
  • the receiving unit is configured to receive first information from the master node when the SCG is in a deactivated state; the first information includes: activation transmission configuration indication TCI state information; the activation TCI status information for the terminal device to receive the physical downlink control channel PDCCH of the SCG;
  • the processing unit is further configured to obtain the first evaluation result of the link signal quality of the SCG according to the first evaluation period based on the reference signal corresponding to the activated TCI state information.
  • the first information is a first radio resource control RRC message
  • the first RRC message includes a second RRC message
  • the activated TCI state information is included in the second RRC message
  • the second RRC message is an RRC message from the secondary node.
  • the first information is an RRC message or a medium access control element MAC CE.
  • the first information further includes third indication information, where the third indication information is used to indicate that the activated TCI state information is the TCI state information of the SCG.
  • a communication apparatus comprising: a sending unit, configured to send first indication information to a terminal device; the first indication information is used to indicate a first evaluation period, or to indicate a first scaling factor; the network device is a master node or a secondary node of the terminal device; wherein, the first evaluation period is used to instruct the terminal device to, when the secondary cell group SCG is in a deactivated state, according to the The first evaluation result is obtained in an evaluation period; the first evaluation result is used to monitor the wireless link or perform the link recovery process on the SCG; the first scaling factor is used to instruct the terminal device according to the third evaluation period and the first scaling factor to determine the first evaluation period.
  • the sending unit is further configured to send second indication information to the terminal device; the second indication information is used to indicate a first indication period or a second scaling factor; wherein the first indication An indication period is used to instruct the terminal device to report the first evaluation result to the upper-layer protocol stack according to the first indication period; the second scaling factor is used to indicate the The terminal device determines the first indication period according to the third indication period and the second scaling factor.
  • a communication device comprising: a receiving unit configured to receive second information from a secondary node, where the second information includes activation transmission configuration indication TCI status information; the activated TCI status information, a physical downlink control channel PDCCH for the terminal equipment to receive the secondary cell group SCG of the secondary node; wherein, the SCG is in a deactivated state; a sending unit is configured to send first information to the terminal equipment, the The first information includes the activated TCI status information.
  • the second information is a second radio resource control RRC message
  • the first information is a first RRC message
  • the first RRC message includes the second RRC message
  • the first information is an RRC message or a medium access control element MAC CE.
  • the first information further includes third indication information, where the third indication information is used to indicate that the activated TCI state information is the TCI state information of the SCG.
  • a communication device comprising: a sending unit configured to send second information to a master node, where the second information includes activation transmission configuration indication TCI status information; the activated TCI status information, The physical downlink control channel PDCCH for the terminal equipment to receive the secondary cell group SCG of the secondary node; wherein, the SCG is in a deactivated state.
  • the second information is an RRC message sent by the secondary node to the primary node, or the second information is an interface message between the secondary node and the primary node.
  • a twelfth aspect provides a communication device, the communication device comprising: a processing unit configured to detect beam beam failure of a first cell in a secondary cell group SCG; wherein the SCG is in a deactivated state; the first The cell is the PSCell or the secondary cell SCell in the SCG; the processing unit is further configured to initiate a random access procedure in the first part of the bandwidth BWP of the primary and secondary cell PSCell in the SCG.
  • the first BWP is the initial BWP of the PSCell.
  • the processing unit is further configured to switch from the initial BWP to the dormant dormant BWP of the PSCell after the random access procedure.
  • the first BWP is the dormant dormant BWP of the PSCell.
  • the communication apparatus when the first cell is an SCell, the communication apparatus further includes: a sending unit, configured to send a first medium access control element MAC to the secondary node after the random access procedure is successful CE; the first MAC CE, used to indicate the beam failure of the first cell.
  • a thirteenth aspect provides a communication device, the communication device comprising: a sending unit configured to send fourth indication information to the secondary node through the master node when the secondary cell group SCG is in a deactivated state; the fourth indication information It is used to indicate the beam beam failure of the first cell in the SCG; the first cell is the PSCell or the secondary cell SCell in the SCG.
  • the fourth indication information is an RRC message, or the fourth indication information is a MAC CE.
  • a fourteenth aspect provides a communication apparatus, the communication apparatus comprising: a receiving unit configured to receive a fourth indication message from a master node of the terminal device, where the fourth indication message is used to indicate that the secondary cell group SCG The beam beam of the first cell fails.
  • the fourth indication information is an RRC message, or the fourth indication information is a MAC CE.
  • a fifteenth aspect provides a communication device, the communication device comprising: at least one processor and an interface circuit, when the processor executes computer program instructions, the communication device is made to perform the above-mentioned first aspect and possible designs
  • a sixteenth aspect provides a chip, the chip includes a processor, when the processor executes computer program instructions, the chip causes the chip to execute the method provided in the first aspect and possible designs, or the second The method provided in the above-mentioned third aspect and possible design, or the method provided in the above-mentioned fourth aspect and possible design, or the above-mentioned fifth aspect and possible design The method provided in the above, or the method provided in the above sixth aspect and possible design, or the method provided in the above seventh aspect and possible design.
  • a computer-readable storage medium comprising: computer software instructions; when the computer software instructions are executed in a communication device or a chip built in the communication device, the communication device is made to execute the above-mentioned first step.
  • the method provided in one aspect and possible design, or the method provided in the above-mentioned second aspect and possible design, or the method provided in the above-mentioned third aspect and possible design, or the above-mentioned fourth aspect and possible design.
  • An eighteenth aspect provides a computer program product, the computer program product comprising instructions, when the computer program product is run on a computer, causing the computer to perform the method provided in the above-mentioned first aspect and possible designs, or the method provided in the above second aspect and possible design, or the method provided in the above third aspect and possible design, or the method provided in the above fourth aspect and possible design, or the above fifth aspect and the method provided in the possible design, or the method provided in the above sixth aspect and the possible design, or the method provided in the above seventh aspect and the possible design.
  • FIG. 1 is a schematic structural diagram of a network system according to an embodiment of the present application.
  • FIG. 2 is a schematic diagram of an indication period T1 and an evaluation period T2 in a wireless link monitoring provided by an embodiment of the present application;
  • FIG. 3 is one of the schematic flowcharts of a communication method provided by an embodiment of the present application.
  • FIG. 4 is the second schematic flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 5 is a third schematic flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 6 is a fourth schematic flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 7 is a fifth schematic flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 8 is a sixth schematic flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 9 is a seventh schematic flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 10 is an eighth schematic flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 11 is one of schematic structural diagrams of a communication device provided by an embodiment of the present application.
  • FIG. 12 is the second schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 13 is a third schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 14 is a fourth schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 15 is a fifth schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 16 is a sixth schematic structural diagram of a communication device provided by an embodiment of the application.
  • FIG. 17 is a seventh schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 18 is an eighth schematic structural diagram of a communication device according to an embodiment of the present application.
  • any embodiments or designs described in the embodiments of the present application as “exemplary” or “such as” should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as “exemplary” or “such as” is intended to present the related concepts in a specific manner to facilitate understanding.
  • the term “and/or” in this application is only an association relationship to describe associated objects, indicating that there can be three kinds of relationships, for example, A and/or B, it can mean that A exists alone, A and B exist at the same time, There are three cases of B alone.
  • the "plurality" in the embodiments of the present application refers to two or more.
  • the network architecture and service scenarios described in the embodiments of the present application are for the purpose of illustrating the technical solutions of the embodiments of the present application more clearly, and do not constitute limitations on the technical solutions provided by the embodiments of the present application.
  • the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.
  • a terminal device In a wireless network, a terminal device (also known as user equipment (UE)) may communicate with multiple base stations. This technology is called dual connectivity (DC), also known as multiple air interface dual connectivity. (multi-radio dual connectivity, MR-DC). These multiple base stations that communicate with terminal equipment may be base stations belonging to the same radio access technology (RAT), for example, multiple base stations are the 4th generation mobile communication technology (4G) The base station, or multiple base stations, are the 5th generation mobile communication technology (5G) base stations; in addition, these multiple base stations that communicate with the terminal equipment may also be base stations of different RATs, for example, communicate with the terminal equipment. One of the two base stations that the device communicates with is a 4G base station and the other is a 5G base station.
  • DC the network side can use the resources of multiple base stations to provide communication services for terminal equipment, thereby providing high-speed transmission services to terminal equipment.
  • the base station that has control plane signaling interaction with the core network is called the master node (master node, MN), and other base stations are called secondary nodes (secondary node, SN).
  • master node master node
  • secondary node secondary node
  • the master node and the core network can establish a data plane connection; the secondary base station and the core network can establish a data plane connection.
  • the terminal equipment can receive the services of multiple cells at the same time under one node, and the set of cells that the MN provides services for the terminal equipment can be called the master cell group (MCG); the SN is the cell that provides services for the terminal equipment.
  • MCG master cell group
  • SCG secondary cell group
  • Cells in the MCG and SCG jointly provide transmission resources for terminal equipment through carrier aggregation (CA) technology.
  • CA carrier aggregation
  • Each cell in the MCG and the SCG may be referred to as a serving cell of the UE.
  • the MCG and the SCG respectively include at least one cell (Cell).
  • PCell refers to a cell deployed at the primary frequency point, and the terminal device initiates the initial connection establishment process, or the terminal device initiates the connection reestablishment process, or is indicated as the PCell cell during the handover process.
  • PSCell primary secondary cell
  • SCG secondary node
  • PSCell refers to the cell in which the terminal device initiates the random access procedure in the secondary node or the cell in which the terminal device initiates data transmission by skipping the random access procedure during the secondary node change process, or the secondary cell in which the random access procedure is initiated during the reconfiguration process for synchronization. Node's cell.
  • PCell and PSCell are collectively referred to as special cell (special cell, SpCell).
  • special cell special cell
  • SCell secondary cell
  • SCell SCell
  • SCell SCell is used to represent cells other than SpCell in MCG and SCG.
  • dual connectivity can be classified into EN-DC, NGEN-DC, NE-DC, NR-DC and other types according to different structures of network deployment. in:
  • the master node is a Long Term Evolution (Long Term Evolution, LTE) base station eNB that has a control plane connection with the 4G core network EPC, and the secondary node is an NR base station.
  • LTE Long Term Evolution
  • an NR base station in an EN-DC is also called a non-standalone (NSA) NR base station, and a terminal device cannot reside in an NR cell under a non-standalone NR base station.
  • An NR base station capable of resident terminal equipment is called a standalone (standalone, SA) NR base station.
  • the master node is the LTE base station base station ng-eNB that has a control plane connection with the 5G core network 5GC, and the secondary node is the NR base station.
  • the master node is an NR base station that has a control plane connection with the 5G core network 5GC, and the secondary node is an LTE base station.
  • the master node is an NR base station that has a control plane connection with the 5G core network 5GC, and the secondary node is an NR base station.
  • FIG. 1 is a schematic structural diagram of a dual-connection communication system.
  • the master node 102 has a control plane connection with the core network 101, and the terminal device 104 establishes a wireless connection with the master node 102 and the auxiliary node 103.
  • the master node 102 is also connected to the slave node 103 .
  • the master node 102 and the core network 101 may be connected through an S1 or NG interface.
  • the master node 102 and the core network 101 at least include a control plane connection, and may also have a user plane connection.
  • the interface between the master node 102 and the core network 101 includes S1-U/NG-U and S1-C/NG-C. Among them, S1-U/NG-U represents the user plane connection, and S1-C/NG-C represents the control plane connection.
  • the secondary node 103 and the core network 101 may or may not have a user plane connection.
  • the data of the terminal device 104 can be distributed to the secondary node 103 by the primary node 101 at the packet data convergence protocol (packet data convergence protocol, PDCP) layer.
  • the master node 102 may also be called a master base station or a master access network device, and the secondary node 103 may also be called a secondary base station or a slave access network device.
  • the above-mentioned primary node 102 and secondary node 103 may be collectively referred to as network devices.
  • the network devices include but are not limited to: Access points (APs) in wireless fidelity (wireless fidelity, WiFi) systems, such as home gateways, routers, servers, switches, bridges, etc., evolved Node B (evolved Node B (eNB), Radio Network Controller (RNC), Node B (Node B, NB), Base Station Controller (BSC), Base Transceiver Station (BTS), Home Base station (for example, home evolved Node B, or home Node B, HNB), baseband unit (baseband unit, BBU), wireless relay node, wireless backhaul node, transmission point (transmission and reception point, TRP or transmission point, TP ), etc., and can also be 5G, such as a gNB in a new radio (NR) system, or a transmission point (TRP or TP), one or a group of base stations in a 5G system (including multiple antenna panels)
  • the network device may adopt the CU-DU architecture. That is, the network device may be composed of a CU and at least one DU. In this case, some functions of the network device are deployed on the CU, and another part of the functions of the network device are deployed on the DU.
  • CU and DU are functionally divided according to the protocol stack.
  • the CU is deployed with a radio resource control (RRC) layer, a PDCP layer, and a service data adaptation protocol (SDAP) layer in the protocol stack; DU is deployed with the protocol stack.
  • the CU has the processing capabilities of RRC, PDCP and SDAP.
  • DU has the processing capability of RLC, MAC and PHY. It can be understood that the division of the above functions is only an example, and does not constitute a limitation on the CU and the DU. That is to say, there may also be other functional division manners between the CU and the DU, which are not described in detail in this embodiment of the present application.
  • the terminal device 104 is a device with wireless transceiving function.
  • the terminal device 104 can be deployed on land, including indoor or outdoor, handheld or vehicle; can also be deployed on water (such as ships, etc.); and can also be deployed in the air (such as aircraft, balloons and satellites, etc.).
  • the terminal equipment may be user equipment (user equipment, UE).
  • the UE includes a handheld device, a vehicle-mounted device, a wearable device or a computing device with a wireless communication function.
  • the UE may be a mobile phone, a tablet computer, or a computer with a wireless transceiver function.
  • the terminal device may also be a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, intelligent Wireless terminals in power grids, wireless terminals in smart cities, wireless terminals in smart homes, and so on.
  • the apparatus for implementing the function of the terminal device 104 may be a terminal device, or may be an apparatus capable of supporting the terminal device to implement the function, such as a chip system.
  • the terminal device 104 is taken as a UE as an example for description.
  • the network side may configure multiple bandwidth parts (BWPs) for the UE, and notify the UE of the currently activated BWP.
  • BWPs bandwidth parts
  • the receiving and transmitting bandwidths of the UE can be changed correspondingly, and the location of the bandwidths can also be changed correspondingly.
  • the BWP used for initial access is called initial BWP (initial BWP).
  • the initial BWP is the first BWP that the network side operates in the corresponding serving cell for the UE.
  • the network side can quickly schedule the UE in order to save power for the UE and subsequent data transmission, and the dormant BWP (dormant BWP) technology is introduced into the SCell.
  • the SCell is still in the active state.
  • the UE does not monitor the physical downlink control channel (PDCCH) in the SCell dormant BWP, nor transmit data on the physical downlink shared channel (PUSCH), nor receive the physical downlink shared channel (physical downlink shared channel). , PDSCH), so as to achieve the purpose of power saving.
  • PDCCH physical downlink control channel
  • PUSCH physical downlink shared channel
  • PDSCH physical downlink shared channel
  • a beam is a communication resource.
  • the beams can be wide beams, or narrow beams, or other types of beams.
  • the beam forming technology may be beamforming technology or other technical means.
  • the beamforming technology may be specifically a digital beamforming technology, an analog beamforming technology, and a hybrid digital/analog beamforming technology. Different beams can be considered as different resources.
  • the same information or different information can be sent through different beams.
  • multiple beams with the same or similar communication characteristics may be regarded as one beam.
  • a beam can be formed by one or more antenna ports for the transmission of data channels, control channels and sounding signals, etc.
  • One or more antenna ports forming a beam can be viewed as a set of antenna ports.
  • the antenna port is a logical concept, and one antenna port may correspond to one physical transmit antenna, or may correspond to multiple physical transmit antennas. In both cases, the UE's receiver will not decompose the signal from the same antenna port. Because from the UE's point of view, no matter whether the channel is formed by a single physical transmit antenna or combined by multiple physical transmit antennas, the reference signal (Reference Signal) corresponding to this antenna port defines this antenna port, for example , corresponding to the antenna port of the demodulation reference signal (de-modulation reference signal, DMRS), that is, the DMRS port, and the terminal can obtain the channel estimation of the antenna port according to the reference signal.
  • Each antenna port corresponds to a time/frequency resource grid and has its own reference signal.
  • An antenna port is a channel, and the terminal needs to perform channel estimation and data demodulation according to the reference signal corresponding to the antenna port.
  • Beams include transmit beams and receive beams. Transmitting beams may refer to the distribution of signal strengths formed in different directions in space after signals are transmitted by antennas, and receiving beams may refer to the distribution of antenna arrays that enhance or weaken the reception of wireless signals in different spatial directions.
  • the beam can be represented by the quasi co-location (QCL) relationship of the antenna ports.
  • the two signals of the same beam have a QCL relationship with respect to a spatial reception parameter (spatial Rx parameter), that is, QCL-Type D: ⁇ Spatial Rx parameter ⁇ in the protocol.
  • Beams can be specifically represented by various signal identifiers in the protocol, such as the resource index of channel state information reference signal (CSI-RS), synchronous signal/physical broadcast channel block (synchronous signal/physical broadcast channel block) , which can be referred to as the SS/PBCH block or SSB for short), the resource index of the sounding reference signal (SRS), and the resource index of the tracking reference signal (TRS).
  • CSI-RS channel state information reference signal
  • synchronous signal/physical broadcast channel block synchronous signal/physical broadcast channel block
  • SRS resource index of the sounding reference signal
  • TRS resource index of the tracking reference signal
  • a beam corresponds to a DMRS port or a transmission configuration index (TCI for short) or a TRP or a sounding reference signal resource indicator (SRS resource indicator, SRI for short) (used for uplink data transmission), Therefore, different beams can also be represented by different DMRS ports or TCI or TRP or SRI.
  • TCI transmission configuration index
  • SRS resource indicator SRI for short
  • the QCL relationship is used to indicate that multiple resources have one or more same or similar communication characteristics, and for multiple resources with a quasi-co-location relationship, the same or similar communication configuration may be used.
  • the signals corresponding to the antenna ports with the QCL relationship have the same parameters, or the parameters of one antenna port (also referred to as QCL parameters) can be used to determine the parameters of another antenna port with the QCL relationship with the antenna port , or, the two antenna ports have the same parameter, or the parameter difference between the two antenna ports is smaller than a certain threshold.
  • the above parameters may include one or more of the following: delay spread, Doppler spread, Doppler shift, average delay, average gain , the spatial Rx parameters.
  • the spatial reception parameters may include one or more of the following: angle of arrival (AOA), average AOA, AOA extension, angle of departure (AOD), average departure angle AOD, AOD extension , receive antenna spatial correlation parameters, transmit antenna spatial correlation parameters, transmit beam, receive beam, and resource identifiers.
  • AOA angle of arrival
  • AOA extension angle of departure
  • AOD angle of departure
  • AOD extension average departure angle AOD
  • receive antenna spatial correlation parameters receive antenna spatial correlation parameters
  • transmit antenna spatial correlation parameters transmit beam, receive beam, and resource identifiers.
  • TCI Transmission configuration indicator
  • TCI is used to indicate QCL information of PDCCH or PDSCH.
  • the TCI can be used to indicate which reference signal the DMRS of the PDCCH or PDSCH and which satisfies the QCL relationship, and then the UE can determine the reference signal according to the TCI, and receive the PDCCH/PDSCH with the same or similar spatial parameters as the reference signal.
  • the TCI state for receiving the PDCCH can be understood as the TCI state for receiving the PDCCH.
  • the network side may indicate one or more control resource sets (CORESET) in the PDCCH configuration of each downlink (downlink, DL) BWP of the UE, and some of the protocols stipulate that the network side has a maximum of each control resource set (CORESET).
  • CORESET control resource set
  • Each BWP of each cell is configured with 3 CORESETs.
  • one or more TCI states (states) for receiving PDCCH may be configured for the UE, and the one or more TCI states for receiving PDCCH may be referred to as candidate TCI states.
  • the TCI state may indicate the QCL type between the DMRS of the PDCCH and one or more reference signals.
  • the network side may indicate the search space (search space) of each DL BWP of the UE in the PDCCH configuration of the BWP, wherein it is stipulated in some protocols that the network side configures a maximum of 10 searches for each BWP of each cell space.
  • search space is associated with a CORESET. Then the UE monitors the PDCCH according to these CORESETs and the corresponding search space configuration.
  • the UE can determine the DMRS information of the monitored PDCCH according to the activated TCI state. . Then the PDCCH can be monitored according to the corresponding search space configuration.
  • Medium Access Control Element MAC CE
  • the search space defines how and where the UE searches for PDCCH (The IE SearchSpace defines how/where to search for PDCCH candidates), and each search space is associated with a CORESET.
  • the UE suspends the SCG, which can be understood as the UE suspends signaling transmission and/or data transmission through the communication link of the SCG, but the terminal retains or stores part or all of the configuration of the SCG .
  • Suspending the SCG means that the UE temporarily stops using the SCG for data transmission, but retains the configuration of the SCG. Specifically, when the UE does not need to use the SCG to provide services for itself or the UE does not need to use the SCG link, for example, when the data rate of the UE is low, the UE can suspend the SCG according to the instruction of the network side, such as retaining the configuration of the SCG, And data transmission is not performed through the SCG; when the SCG needs to be used to provide services for itself or the SCG link needs to be used, for example, when the data rate of the UE becomes high, the UE can restore (restore/resume) the SCG according to the instructions of the network side. configuration, and data transfer via SCG.
  • a suspended SCG may also be referred to as the SCG is in a suspended state, or the SCG is in an idle/inactive state, or the UE is in a dormancy or inactive state or a deactivated state in the SCG Wait.
  • Restoring SCG can be called restore SCG or resume SCG.
  • the resumed SCG or the SCG when it is not suspended may also be referred to as the SCG being in a busy/active (active) state, or the UE is in a busy or active state or an active state in the SCG, or the like.
  • suspend SCG can be implemented in the following ways:
  • Scheme 1 adopt the method of making the UE dormant in PSCell and SCell. For example, suspend SCG is implemented by making UE enter dormant BWP in PSCell and SCell. In this way, the UE does not need to monitor the PDCCH/PDSCH in the PSCell and the SCell, nor does it need to send the PUSCH.
  • Scheme 2 The UE adopts a long discontinuous reception (long discontinuous reception, long DRX) method in the SCG. In this way, the UE may not send and receive data in the SCG for a long time, thereby saving power.
  • long discontinuous reception long DRX
  • the UE may not perform the random access procedure in the suspended SCG, that is, not perform the SCG RACH.
  • the UE will detect the downlink signal quality of PCell and PSCell, and indicate synchronization or desynchronization to the upper layer in each indication period.
  • the UE usually only monitors the downlink signal quality of the activated downlink BWP of the PCell and PSCell.
  • the RLM process can include:
  • the network side configures a reference signal (reference signal, RS) set for RLM for each BWP of the primary cell and the primary and secondary cells of the UE (these RSs may be referred to as RLM explicit RSs) .
  • the reference signals in the reference signal set may be CSI-RS or SSB.
  • the UE can perform radio link monitoring according to the reference signals in the above reference signal set.
  • NRLM can be determined by the maximum number of SSBs Lmax of the corresponding cell, for example, the corresponding relationship between NRLM and Lmax can be determined according to Table 1 below:
  • the network side does not configure the above reference signal set for the UE, but the network side configures the UE with a TCI state for receiving PDCCH.
  • Each of these TCI states includes one or more CSI-RSs, and the RSs included in the TCI states may be called implicit RSs of the RLM.
  • the network side will notify to change the active TCI state of the received PDCCH. Furthermore, the UE may determine the reference signal included in the activated TCI state according to the activated TCI state of the received PDCCH. The UE can then perform radio link monitoring based on these reference signals. in:
  • the UE uses the reference signal to perform RLM;
  • the UE performs RLM using the reference signal set to QCL-TypeD. (The network side will not set the two reference signals as QCL-TypeD for the UE).
  • the UE usually does not use aperiodic or semi-static reference signals for radio link monitoring.
  • the UE can perform radio link monitoring according to NRLM reference signals at most.
  • the NRLM may be determined by the maximum number of SSBs Lmax of the corresponding cell, for example, the corresponding relationship between the NRLM and Lmax may be determined according to the above Table 1.
  • the UE selects N RLM RSs for RLM from the corresponding active TCI states of the received PDCCH in the CORESETs associated with the search space set.
  • the UE may be selected according to the period of the RS from low to high. If the RSs corresponding to multiple CORESETs have the same period, the UE selects from the index of the CORESET arriving from the smallest.
  • the physical layer of the UE evaluates the link signal quality of the corresponding cell once in each indication period, and obtains the evaluation result.
  • the physical layer of the UE evaluates the link signal quality in the previous evaluation period, and obtains the evaluation result corresponding to the indication period.
  • one evaluation period may be selected from the plurality of evaluation periods to evaluate the link signal quality in the evaluation period.
  • the physical layer of the UE evaluates the link signal quality in the closest evaluation period before the indication period ends, and obtains the evaluation result corresponding to the indication period.
  • the indication period of the RLM is T1
  • the evaluation period is T2.
  • the physical layer of the UE evaluates the link signal quality of the cell once every time interval T1, that is , the physical layer of the UE as shown in FIG. link signal quality.
  • the rectangular box in FIG. 2 shows the time corresponding to each evaluation period when the evaluation period is T2.
  • the physical layer of the UE evaluates the link signal quality of the cell at time t 1 , t 2 , t 3 , . That is, as shown in Figure 2, at time t 1 , the physical layer of the UE evaluates the link signal quality of the cell according to the reference signal obtained in the evaluation period N 1 , and obtains the evaluation result; at time t 2 , the physical layer of the UE is For the reference signal acquired in the evaluation period N2 , the link signal quality of the cell is evaluated to obtain the evaluation result; at time t3 , the physical layer of the UE is the reference signal acquired in the evaluation period N3, and the link of the cell is evaluated. Evaluate the signal quality of the channel to obtain the evaluation result... and so on, at time t n , the physical layer of the UE evaluates the link signal quality of the cell based on the reference signal obtained in the evaluation period N n , and obtains the evaluation result.
  • the maximum value between the shortest period of the RLM resource and 10ms is used as the indication period.
  • the second is that when the UE is configured with DRX in the current cell under test, the maximum value between the shortest period of the RLM resource and the DRX period is used as the indication period. Or, in the case where the UE is configured with DRX in the current cell under test, when the DRX cycle is less than or equal to 320ms, the maximum value of the shortest cycle of 10ms, 1.5 ⁇ DRX cycle and 1.5 ⁇ RLM resources is used as the indication cycle, when the DRX cycle is less than or equal to 320ms When it is greater than 320ms, the DRX cycle is used as the indication cycle.
  • the size of the evaluation period used to evaluate the link signal quality in the RLM is related to whether the UE is configured with DRX in the current cell under test, and the DRX configured by the UE in the cell under test.
  • Period the type of reference signal used for evaluation (SSB or CSI-RS), the frequency band where the BWP of the current cell under test is located (FR1 or FR2), and the type of indication sent to the upper-layer protocol stack corresponding to the indication period (synchronization indication or out-of-synch) indication), and other parameters related. Specifically, it can be divided into the following four situations:
  • the evaluation period T Evaluate_out_SSB of the synchronization indication and the evaluation period T Evaluate_in_SSB of the out-of-synchronization indication can be determined according to the following table 2 to determine:
  • the value of P is related to whether the cell is configured with intra-frequency, inter-frequency, or inter-system measurement gaps, and whether these measurement gaps overlap with the transmission time of the SSB.
  • the evaluation period T Evaluate_out_SSB of the synchronization instruction and the evaluation period T Evaluate_in_SSB of the out-of-synchronization instruction can be determined according to the following table. 3 to determine:
  • the value of P is related to whether the cell is configured with intra-frequency, inter-frequency, or inter-system measurement gaps, and whether these measurement gaps overlap with the transmission time of the SSB.
  • the evaluation period T Evaluate_out_CSI-RS of the synchronization indication and the evaluation period T Evaluate_in_CSI- RS can be determined according to Table 4 below:
  • the value of P is related to whether the cell is configured with intra-frequency, inter-frequency, or inter-system measurement gaps, and whether these measurement gaps overlap with the CSI-RS transmission moment.
  • the evaluation period T Evaluate_out_CSI-RS of the synchronization indication and the evaluation period T Evaluate_in_CSI- RS can be determined according to Table 5 below:
  • the value of P is related to whether the cell is configured with intra-frequency, inter-frequency, or inter-system measurement gaps, and whether these measurement gaps overlap with the CSI-RS transmission moment.
  • the physical layer of the UE evaluates the link signal quality of the cell according to the reference signal acquired in the previous evaluation period to obtain an evaluation result.
  • the UE compares the link signal quality in an evaluation period with Qout (Qout is used to define the corresponding link signal quality when the downlink radio link cannot be reliably received.
  • Qout may correspond to an out-of-sync block error rate (in- sync block error rate, BLERin) level) and Qin (Qin is used to define the link signal quality when the downlink wireless link can be reliably received with a higher reliability than Qout.
  • Qin can correspond to a The synchronization block error rate (out-of-sync block error rate, BLERout) level) is compared, and then the evaluation result is obtained.
  • the physical layer of the UE After obtaining the evaluation result in each indication period, the physical layer of the UE sends the indication information corresponding to the evaluation result to the upper-layer protocol stack.
  • the physical layer of the UE sends indication information corresponding to the evaluation result to the upper-layer protocol stack, including: the physical layer of the UE sends a synchronization indication or an out-of-synchronization indication to the upper-layer protocol stack.
  • the upper protocol stack may be the RRC layer.
  • the physical layer of the UE when the link signal quality corresponding to all RSs of the RLM is worse than Qout, the physical layer of the UE sends an out-of-synchronization indication to the upper-layer protocol stack.
  • the link signal quality corresponding to any RS of the RLM is better than Qin, the physical layer of the UE sends a synchronization indication to the upper-layer protocol stack.
  • the RLM further includes: S14.
  • the RRC layer of the UE receives N310 consecutive out-of-synchronization indications from the physical layer, the UE starts a timer T310. After the timer is started, the UE performs link signal quality monitoring using the evaluation period and the indication period corresponding to the assumption that DRX is not currently configured until T310 times out or stops.
  • the UE is in DC, if both the MN and the SN are NR base stations, the UE performs the link recovery process in each serving cell in the MCG or SCG respectively. During the link recovery process, the UE detects the downlink signal quality of each serving cell in the MCG or SCG, and when a beam failure occurs in one of the serving cells, the UE performs corresponding operations to re-access the serving cell.
  • the network side will configure a CSI-RS resource set for the UE It is used for link signal quality assessment during the link recovery process (the CSI-RS in these CSI-RS resource sets are all periodic). Include up to two RSs.
  • the UE uses the periodic CSI-RS in the active TCI state used to receive the PDCCH in the BWP as the CSI-RS resource set
  • the RS with QCL-TypeD is used as the RS in .
  • a maximum of two RSs are included, and these RSs are single-port RSs.
  • the physical layer of the UE evaluates the link signal quality of the corresponding cell once in each indication period.
  • the physical layer of the UE evaluates the link signal quality in the previous evaluation period, and obtains the evaluation result corresponding to the indication period. For example, in each indication period, the physical layer of the UE evaluates the link signal quality in the closest evaluation period before the indication period ends, and obtains the evaluation result corresponding to the indication period.
  • the size of the indication period used to evaluate the link signal quality in the link recovery process is related to whether the UE is configured with DRX.
  • the parameters such as the shortest period corresponding to each reference signal and the size of the DRX period configured by the UE in the current cell under test are related. Specifically, it can be divided into the following two cases (refer to Chapter 8.5.4 of 3GPP TS 38.133 for description):
  • the cycle is the DRX cycle; if the DRX cycle length is less than or equal to 320ms, the cycle is max(1.5 ⁇ DRX cycle length, The shortest period of SSB in ), namely (1.5 ⁇ DRX period length) and (
  • the cycle is max (1.5 ⁇ DRX cycle length, The shortest period of csi-rs in ).
  • the size of the evaluation period used to evaluate the link signal quality is related to whether the UE is configured with DRX in the current cell under test, and whether the UE is currently under test.
  • Parameters such as the DRX cycle configured by the cell, the type of reference signal (SSB or CSI-RS) used for evaluation, and the frequency band (FR1 or FR2) where the BWP of the current cell under test is located are related. Specifically, it can be divided into the following four situations:
  • the evaluation period T Evaluate_BFD_SSB can be determined according to Table 6 below:
  • the value of P is related to whether the cell is configured with intra-frequency, inter-frequency, or inter-system measurement gaps, and whether these measurement gaps overlap with the transmission time of the SSB.
  • the evaluation period T Evaluate_BFD_SSB can be determined according to Table 7 below:
  • the value of P is related to whether the cell is configured with intra-frequency, inter-frequency, or inter-system measurement gaps, and whether these measurement gaps overlap with the transmission time of the SSB.
  • the value of N is 8.
  • the evaluation period T Evaluate_BFD_CSI-RS can be determined according to Table 8 below:
  • the value of P is related to whether the cell is configured with intra-frequency, inter-frequency, or inter-system measurement gaps, and whether these measurement gaps overlap with the transmission time of the SSB.
  • the value of N is 1.
  • the evaluation period T Evaluate_BFD_CSI-RS can be determined according to Table 9 below:
  • the value of P is related to whether the cell is configured with intra-frequency, inter-frequency, or inter-system measurement gaps, and whether these measurement gaps overlap with the transmission time of the SSB.
  • the value of N is 1.
  • the physical layer of the UE evaluates the link signal quality of the cell according to the reference signal acquired in the previous evaluation period to obtain an evaluation result.
  • the link signal quality in one evaluation period of the UE and the threshold Q out, LR (the threshold Q out, LR defines the corresponding link signal quality when the downlink signal quality cannot be reliably received.
  • Q out may correspond to Assuming that the transmission parameters of the PDCCH are the corresponding transmission bit error rate levels of 10% under the transmission parameters specified in the protocol), the evaluation results are obtained.
  • the physical layer of the UE After obtaining the evaluation result in each indication period, the physical layer of the UE sends the indication information corresponding to the evaluation result to the upper-layer protocol stack.
  • the physical layer of the UE sends the indication information corresponding to the evaluation result to the upper-layer protocol stack, including: the physical layer of the UE sends the indication information of the failure of the beam to the upper-layer protocol stack.
  • the upper protocol stack may be the MAC layer.
  • the physical layer of the UE uses If all RSs in the evaluation link signal quality are worse than the thresholds Q out,LR , the physical layer of the UE sends a beam failure indication message to the upper layer.
  • the MAC layer of the UE When the MAC layer of the UE receives the indication information of a beam failure of a serving cell from the physical layer, the MAC layer of the UE will start or restart a timer, and record the number of times of the currently received beam failure indication information plus 1. If before the timer expires, when the MAC layer of the UE receives the indication information that a certain number of beams in the serving cell fail, if the serving cell is PCell or PSCell, the UE initiates a random access procedure in this cell; if the serving cell is PCell or PSCell, the UE initiates a random access procedure; If the cell is an SCell, the UE triggers a beam failure recovery (BFR) process of the SCell. If the timer expires, the MAC layer of the UE will set the number of times of beam failure indication information currently received to 0.
  • BFR beam failure recovery
  • the UE triggers the BFR process of the SCell, including:
  • the MAC layer of the UE will generate a BFR MAC CE of the SCell and send the BFR MAC CE to the network. side (if it is the SCell of the master node, it will be sent to the master node; if it is the SCell of the slave node, it will be sent to the slave node);
  • the MAC layer of the UE will generate a shortened BFR MAC CE and send the shortened BFR MAC CE to the network side (If it is the SCell of the primary node, it will be sent to the primary node; if it is the SCell of the secondary node, it will be sent to the secondary node);
  • a scheduling request is triggered for SCell beam failure recovery, and then the UE sends a BFR MAC CE to (if it is the SCell of the primary node, it is sent to the primary node; if it is the SCell of the secondary node, it is sent to the secondary node).
  • the contents carried in the BFR MAC CE mainly include: 1) serving cell index: used to indicate which serving cell detects beam failure; 2) candidate beam identifier whose signal quality is higher than or equal to a threshold Q out,LR .
  • the UE will evaluate the type of reference signal (SSB or SS) according to whether DRX is configured in the current cell under test, the DRX cycle configured by the UE in the cell under test, and the type of reference signal used.
  • CSI-RS and the frequency band (FR1 or FR2) where the BWP of the current cell under test is located, to determine the evaluation period for evaluating the link signal quality. That is to say, regardless of whether the UE suspends the SCG or resumes the SCG, the same method will be used to determine the evaluation period. This results in that the evaluation period adopted by the UE during the radio link monitoring process does not match the current state of the UE.
  • an embodiment of the present application provides a communication method, and the communication method provided by the embodiment of the present application can be applied to the communication system shown in FIG. 1 .
  • the terminal device included in the communication system is an UE as an example for description.
  • the method includes:
  • the UE obtains a first evaluation result of the link signal quality of the SCG according to a first evaluation period.
  • the SCG is in a deactivated state, which may refer to a state in which the configuration of the SCG is suspended, and the UE does not transmit data through the SCG. From the perspective of the UE, the SCG is in a deactivated state, and it can also be considered that the UE is in a deactivated state in the SCG.
  • the UE When the SCG is in the deactivated state, the UE will suspend (or retain) the configuration of the SCG but not completely release the configuration of the SCG, so that when the UE needs to transmit data through the SCG, it can use the suspended (or reserved) SCG
  • the configuration restores the SCG to return the SCG to the active state.
  • the first evaluation period specifically refers to the time length corresponding to the link signal quality reflected by each evaluation result when evaluating the link signal quality of the SCG when the SCG of the UE is in a deactivated state.
  • T2 when the SCG of the UE is in a deactivated state, when evaluating the link signal quality of the SCG, each time a link within a time period of T2 is evaluated. The signal quality of the channel is evaluated, and the evaluation result is obtained.
  • the UE acquires a second evaluation result of the link signal quality of the SCG according to the second evaluation period.
  • the second evaluation period specifically refers to when the SCG of the UE is in the active state, when the link signal quality of the SCG is evaluated, the link signal quality reflected by each evaluation result corresponds to length of time.
  • the UE in the case of evaluating the link signal quality of the SCG, for example, when the UE performs radio link monitoring on the SCG, or performs a link recovery process on the SCG, the UE may be in the SCG state. In different states (deactivated state or activated state), the evaluation period corresponding to the current state is used to obtain the evaluation result of the link signal quality of the SCG. By setting the evaluation period corresponding to different SCG states, the power consumption of the terminal device and the accuracy of the evaluation result can be taken into account, so that the wireless link monitoring or link recovery process can be performed more flexibly.
  • the UE may determine whether to execute S101 or S102 according to the current state (ie, the deactivated state or the activated state) of the SCG of the UE, and then according to the evaluation period corresponding to the current state (ie, the first evaluation period or the second evaluation period) to obtain the evaluation result of the link signal quality of the SCG.
  • the current state ie, the deactivated state or the activated state
  • the evaluation period corresponding to the current state
  • the evaluation result (that is, the first evaluation result or the second evaluation result) of the link signal quality of the SCG is obtained according to the evaluation period (that is, the first evaluation period or the second evaluation period), and the content of this content is
  • the physical layer of the UE evaluates the link signal quality in an evaluation period before each indication period and obtains the corresponding evaluation result corresponding to the indication period.
  • Description, or can refer to the above description of the link recovery process in S22 in each indication period the physical layer of the UE evaluates the link signal quality in the previous evaluation period and obtains the corresponding description of the indication period corresponding to the evaluation result , and will not be repeated here.
  • the UE can obtain the evaluation result of the signal quality of the SCG link according to the evaluation period corresponding to the current state of the SCG. Therefore, in some specific scenarios, for example, when the shortest period of the RLM resource is a specific value, or the DRX period is a specific value, the first evaluation period corresponding to the SCG in the deactivated state is the same as the second evaluation period in which the SCG is in the active state. may be equal in length. However, in the specific implementation manner of the method provided by the present application, there are at least some scenarios. When the SCG is in the deactivated state and the SCG is in the activated state, the lengths of the corresponding first evaluation period and the second evaluation period are not equal.
  • the network device can instruct the SCG of the UE to enter the deactivated state through various existing technologies, or instruct the SCG of the UE to recover from the deactivated state to the activated state.
  • the network device may be the primary node or the secondary node of the UE, which may not be limited in this application.
  • the UE performs radio link monitoring or a link recovery process on the SCG according to the first evaluation result or the second evaluation result.
  • the method provided in this embodiment when the method provided in this embodiment is applied to the scenario of performing RLM on the SCG, if the SCG is in the deactivated state, the UE performs radio link monitoring on the SCG according to the first evaluation result; if the SCG is in the activated state , the UE performs radio link monitoring on the SCG according to the second evaluation result.
  • the method provided in this embodiment is applied to the scenario of performing the link recovery process on the SCG, if the SCG is in the deactivated state, the UE performs the link recovery process on the SCG according to the first evaluation result; In the active state, the UE performs a link recovery process on the SCG according to the second evaluation result.
  • the wireless link monitoring or the link recovery process is performed on the SCG.
  • the physical layer of the UE After obtaining the evaluation result in each indication period in S13, the physical layer of the UE sends a corresponding description of the indication information corresponding to the evaluation result to the upper-layer protocol stack, or you can refer to the above-mentioned introduction to the link recovery process.
  • the physical layer of the UE After obtaining the evaluation result in each indication period, the physical layer of the UE sends a corresponding description of the indication information corresponding to the evaluation result to the upper-layer protocol stack, which will not be repeated here.
  • the method provided in this embodiment further includes:
  • the physical layer of the UE reports indication information corresponding to the first evaluation result to the upper-layer protocol stack.
  • the physical layer of the UE reports indication information corresponding to the second evaluation result to the upper-layer protocol stack.
  • the physical layer of the UE reports the indication information corresponding to the first evaluation result to the upper-layer protocol stack; when the SCG is in the activated state, then According to the second indication period, the physical layer of the UE reports indication information corresponding to the second evaluation result to the upper-layer protocol stack.
  • the UE when the SCG is in different states (deactivated state or activated state), the UE can move the physical layer of the UE to the upper layer according to the indication period (the first indication period or the second indication period) corresponding to the current state.
  • the protocol stack reports the indication information corresponding to the evaluation result.
  • the SCG when the SCG is in a deactivated state, it corresponds to a longer indication period; when the SCG is in an activated state, it corresponds to a shorter indication period.
  • the energy consumption of the UE when the SCG is in the deactivated state can be lower than the energy consumption when the SCG is in the activated state.
  • the UE may report the indication information corresponding to the first evaluation result to the upper-layer protocol stack according to the indication period corresponding to the current state of the SCG. Therefore, in some specific scenarios, for example, when the DRX cycle is a specific value, the length of the first indication period corresponding to the SCG in the deactivated state may be equal to the length of the second indication period when the SCG is in the activated state. However, in the specific implementation manner of the method provided in this application, there are at least some scenarios where the lengths of the corresponding first indication period and the second indication period are unequal when the SCG is in the deactivated state and the SCG is in the activated state.
  • the upper-layer protocol stack when the method provided in this embodiment is applied to the radio link monitoring, the upper-layer protocol stack may specifically be the RRC layer.
  • the upper-layer protocol stack when the method provided in this embodiment is applied to the link recovery process, the upper-layer protocol stack may specifically be the MAC layer.
  • the first indication period may be understood as a period in which the physical layer of the UE reports the indication information corresponding to the first evaluation result to the upper-layer protocol stack.
  • the second indication period may be understood as a period in which the physical layer of the UE reports the indication information corresponding to the first evaluation result to the upper-layer protocol stack.
  • the UE when the SCG of the UE is in the deactivated state, the UE obtains the first evaluation result of the link signal quality of the SCG in the previous first evaluation cycle in each first indication cycle, and After obtaining the first evaluation result in each first indication period, the physical layer of the UE reports the indication information corresponding to the first evaluation result to the RRC layer.
  • the indication information corresponding to the first evaluation result may include: a synchronization indication or an out-of-synchronization indication.
  • the physical layer of the UE sends an out-of-synchronization indication to the RRC layer.
  • the physical layer of the UE sends a synchronization indication to the upper-layer protocol stack.
  • the UE when the SCG of the UE is in the active state, the UE obtains the second evaluation result of the link signal quality of the SCG in the previous second evaluation cycle in each second indication cycle, and obtains the first evaluation result in each second indication cycle. After the second evaluation result, the physical layer of the UE reports the indication information corresponding to the second evaluation result to the RRC layer.
  • the indication information corresponding to the second evaluation result may include: a synchronization indication or an out-of-synchronization indication.
  • the UE when the SCG of the UE is in a deactivated state, the UE obtains the first evaluation result of the link signal quality of the SCG in the previous first evaluation cycle in each first indication cycle, and After obtaining the first evaluation result in each first indication period, if the first evaluation result indicates that the physical layer of the UE uses The signal quality of all RS evaluation links in is worse than the threshold Q out,LR , and the physical layer of the UE reports the indication information corresponding to the first evaluation result (that is, the indication information of beam failure) to the MAC layer.
  • the UE obtains the second evaluation result of the link signal quality of the SCG in the previous second evaluation cycle in each second indication cycle, and obtains the first evaluation result in each second indication cycle.
  • the second evaluation result indicates that the physical layer of the UE uses The signal quality of all RSs in the evaluation link is worse than the threshold Q out,LR , then the physical layer of the UE reports the indication information corresponding to the second evaluation result (that is, the indication information of beam failure) to the MAC layer.
  • the UE may determine the second evaluation period according to the manner of determining the evaluation period during the radio link monitoring or link recovery process described in S12 or S22 above.
  • the above-mentioned first evaluation period may be obtained from indication information from a network device.
  • the following Figures 4 and 5 describe two specific implementations respectively:
  • Implementation mode 1 As shown in FIG. 4 , the above method in this embodiment may further include:
  • the UE receives the first indication information from the network device.
  • the first indication information is used to indicate the first evaluation period.
  • the network device may be the primary node or the secondary node of the UE. That is to say, the first indication information may be sent by the master node to the UE, or may be sent by the secondary node to the UE, which is not limited in this application.
  • the network device may send the first indication information to the UE through various technologies.
  • the network device can send the first indication information to the UE by any one of the manners in which the network device sends a MAC CE or RRC message or an L1 indication message to the UE.
  • the first evaluation period may be notified to the UE by the network device.
  • This implementation can prevent the size of the evaluation period from being affected by parameters such as whether the cell under test is configured with DXR and the size of the DRX period, thereby preventing the UE from consuming unnecessary power, and is especially suitable for the scenario where the SCG is in a deactivated state and no DRX is configured for the SCG. , the problem of high power consumption caused by the UE using an evaluation period not corresponding to DRX to evaluate the link signal quality can be avoided.
  • the effect of controlling the size of the first evaluation period by the network device may also be achieved.
  • Implementation mode 2 As shown in FIG. 5 , the above method in this embodiment may further include:
  • S106 The UE receives the first indication information from the network device.
  • the network device may be the primary node or the secondary node of the UE.
  • the first indication information is used to indicate the first scaling factor.
  • the network device may send the first indication information to the UE through various technologies.
  • the UE determines the first evaluation period according to the third evaluation period and the first scaling factor.
  • the third evaluation cycle may be an evaluation cycle adopted in the prior art.
  • the third evaluation period can be any one of Tables 2-9.
  • the UE is configured according to whether the UE has DRX in the current cell under test, the DRX period configured by the UE in the cell under test, and the type of reference signal used for evaluation.
  • the evaluation period is determined by parameters such as (SSB or CSI-RS) and the frequency band (FR1 or FR2) where the BWP of the current cell under test is located.
  • the third evaluation period is an evaluation period determined by the UE according to the table in Table 2-9 according to the UE not configuring DRX in the currently detected cell or according to the UE using a specific DRX period in the currently detected cell.
  • the size of the third evaluation period may not be limited.
  • the UE may determine the first evaluation period according to the first scaling factor from the network device, according to the third evaluation period and the first scaling factor (eg, according to the first scaling factor, for the third The evaluation period is scaled to obtain the first evaluation period).
  • this implementation can prevent the size of the evaluation period from being affected by parameters such as whether the cell under test is configured with DXR and the size of the DRX period, thereby preventing the UE from consuming unnecessary power, especially when the SCG is in a deactivated state and is not used for the SCG
  • the problem of high power consumption caused by the UE using a non-DRX-corresponding evaluation period to evaluate the link signal quality can be avoided.
  • the effect of controlling the size of the first evaluation period by the network device can also be achieved.
  • the above-mentioned first indication period may be acquired by the UE according to a predetermined rule.
  • the first evaluation period may be an evaluation period corresponding to a predetermined DRX period.
  • the first evaluation period may be an evaluation period corresponding to a predetermined DRX period in any of Tables 2-9.
  • the predetermined DRX cycle may be the maximum DRX cycle (eg, 10240 ms) in the current protocol.
  • the predetermined DRX cycle may be a DRX cycle greater than 320 ms.
  • the first indication period described in S104 may be obtained from indication information from a network device, and the following two specific implementation manners are respectively described in FIG. 6 and FIG. 7 .
  • Implementation mode 1 As shown in Figure 6, the method further includes:
  • S108 The UE receives the second indication information from the network device.
  • the second indication information is used to indicate the first indication period.
  • the network device is the primary node or secondary node of the UE.
  • the UE may determine the first indication period according to the second indication information. Then, according to the first indication period, the UE's physical layer can report the indication information corresponding to the first evaluation result to the upper-layer protocol stack.
  • the first indication period may be notified to the UE by the network device.
  • this implementation can prevent the indication period from being affected by parameters such as whether the cell under test is configured with DXR, DRX period size, etc. Avoid unnecessary power consumption by the UE.
  • the effect of controlling the size of the first indication period by the network device may also be achieved.
  • Implementation Mode 2 As shown in Figure 7, the method further includes:
  • S109 The UE receives the second indication information from the network device.
  • the second indication information is used to indicate the second scaling factor.
  • the network device is the primary node or secondary node of the UE;
  • the UE determines the first indication period according to the third indication period and the second scaling factor.
  • the third indication period may be an indication period adopted in the prior art.
  • the third indication period may be, in the prior art, whether the UE has DRX configured in the current cell under test, the DRX period configured by the UE in the current cell under test, the RLM or the period of the reference signal used in the link recovery process and other parameters to determine the indication period.
  • the third indication period is an indication period determined by the UE according to that the UE is not configured with DRX in the currently detected cell or according to the UE using a certain specific DRX period in the currently detected cell.
  • the size of the third indication period may not be limited.
  • the UE may determine the first indication period according to the second scaling factor from the network device, according to the third indication period and the second scaling factor (for example, scaling the third indication period according to the second scaling factor) , and then obtain the first indication period).
  • this implementation can prevent the indication period from being affected by parameters such as whether the cell under test is configured with DXR, DRX period size, etc. Avoid unnecessary power consumption by the UE.
  • the effect of controlling the size of the first indication period by the network device can also be achieved.
  • the first indication period may be an indication period corresponding to a predetermined DRX period.
  • the indication period corresponding to the predetermined DRX period may be an indication period corresponding to a predetermined DRX period in the manner of determining the indication period adopted in the above S12 or S22.
  • the first indication period may be the maximum value between the shortest period of the RLM resource and the predetermined DRX period.
  • the first indication cycle when the predetermined DRX cycle is less than or equal to 320ms, the first indication cycle may be the shortest cycle of 10ms, 1.5 ⁇ predetermined DRX cycle, and 1.5 ⁇ RLM resources. The maximum value of , when the predetermined DRX cycle is greater than 320ms, the predetermined DRX cycle is used as the first indication cycle.
  • the first indication cycle may be the predetermined DRX cycle ; If the predetermined DRX cycle length is less than or equal to 320ms, the first indication cycle is max(1.5 ⁇ predetermined DRX cycle, The shortest period of SSB in ), namely (1.5 ⁇ predetermined DRX period) and (
  • the method provided in this embodiment is applied to the link recovery process, for using CSI-RS to evaluate link signal quality, if the predetermined DRX cycle length exceeds 320ms, the first indication cycle is the predetermined DRX cycle; if the predetermined DRX cycle length is less than or equal to 320ms, the cycle is max(1.5 ⁇ predetermined DRX cycle, The shortest period of csi-rs in ).
  • the value of the predetermined DRX cycle may be determined according to actual needs.
  • the predetermined DRX cycle may be a large DRX cycle (eg, 10240ms) in the current protocol.
  • the predetermined DRX cycle may be a DRX cycle greater than 320 ms. This application may not limit the value of the predetermined DRX cycle.
  • the content of S101-S103 may not be executed before executing S107 in the communication method provided by the present application. That is to say, in some scenarios, in the above methods of the embodiments of the present application, the technical means described in S107-S110 may be implemented independently without using the methods provided in S101-S103, so as to achieve corresponding technical effects.
  • the UE may need to determine the reference signal for the RLM or link recovery process according to the active TCI state of the received PDCCH of the SCG.
  • the active TCI state of the received PDCCH is usually transmitted through the MAC CE carried on the PDSCH channel.
  • the UE may not be able to receive the PDSCH of the secondary node. As a result, the UE cannot obtain the activated TCI state of the received PDCCH of the SCG, and thus cannot perform the RLM or link recovery process on the SCG.
  • the method provided in this embodiment may further include:
  • the secondary node of the UE sends the second information to the primary node.
  • the second information includes activated TCI state information.
  • the above activated TCI state information is used for the UE to receive the PDCCH of the SCG.
  • the above-mentioned activated TCI status information is used to indicate the activated TCI status of the receiving PDCCH of the SCG.
  • the secondary node can obtain a reference signal (such as CSI-RS) that meets the conditions through the SRS from the UE, and then adjust the activated TCI state of the received PDCCH of the SCG, so as to use the TCI state corresponding to the above-mentioned reference signal that meets the conditions as the activation TCI status. That is, the secondary node determines that the activated TCI state information included in the second information is used to indicate the TCI state corresponding to the reference signal that satisfies the condition.
  • CSI-RS such as CSI-RS
  • the UE may send the measurement result of the reference signal monitored by the UE in the SCG to the secondary node through the master node, and the secondary node may determine the content of the second information according to the measurement result of the reference signal monitored by the UE in the SCG.
  • the master node sends the first information to the UE.
  • the first information includes the above-mentioned activated TCI state information.
  • the UE obtains an evaluation result of the link signal quality of the SCG based on the reference signal corresponding to the activated TCI state information.
  • the secondary node when the SCG of the UE is in the deactivated state, the secondary node can first send the activated TCI status information to the master node, and then the master node can send the activated TCI status information to the UE. , to send the active TCI status information to the UE. In this way, it can be avoided that the UE cannot obtain the activated TCI state of the received PDCCH of the SCG, and thus cannot perform the RLM or link recovery process on the SCG.
  • the above S113 or the above S101 may specifically include:
  • the UE obtains the first evaluation result of the link signal quality of the SCG according to the first evaluation period based on the reference signal corresponding to the activated TCI state information.
  • the UE may perform a radio link monitoring or link recovery process on the SCG with reference to the corresponding description of the above S103.
  • the UE may not select different evaluation periods according to the different states of the SCG (deactivated state or activated state) to evaluate the link signal quality of the SCG (ie, S101-S103). , and use other methods to perform RLM measurement or radio link recovery.
  • the methods provided in S111-S113 can also be implemented independently to achieve corresponding technical effects, which are not limited in this application.
  • the first information may be a first RRC message
  • the second information may be a second RRC message.
  • the first RRC message includes the second RRC message
  • the activated TCI state information is included in the second RRC message.
  • the activated TCI state information may be carried in an RRC message (referred to as a second RRC message) by the secondary node and sent to the primary node.
  • the DU of the secondary node can send the activated TCI status information to the CU of the secondary node, and then the CU of the secondary node generates an RRC message (ie, the second RRC message), and then sends the second RRC message to the CU of the secondary node.
  • the RRC message is sent to the master node.
  • the second information may be carried in an interface message (for example, s-node addition request acknowledge, s-node modification request acknowledge, s-node modification required) sent by the secondary base station to the master node.
  • the master node then encapsulates the second RRC message into an RRC message (referred to as the first RRC message) in such a way that it is sent to the UE, so as to send the active TCI status information to the UE.
  • the second RRC message is generated by the secondary node.
  • the first RRC message is generated by the master node.
  • the first information may be an RRC message or a medium access control element MAC CE.
  • the second information may be sent to the master node in a manner that the master node can perceive.
  • the second information may be an interface message (for example, s-node addition request acknowledge, s-node addition request acknowledge, s-node) sent from the secondary base station to the master node. modification request acknowledge and s-node modification required) are carried in the explicit way of cells.
  • the secondary node can send the second information to the primary node in a way that the primary node can perceive, for example, by sending an interface message, so that the primary node can parse the second information and obtain The activated TCI state information carried in the second information.
  • the DU of the secondary node can send the active TCI status to the CU of the secondary node, and then the CU of the secondary node generates an interface message, and then sends the second information to the primary node.
  • the master node can carry the activated TCI state information in the RRC message or the MAC CE (that is, the first information) and send it to the UE, To realize that the master node sends the active TCI status information to the UE.
  • the master node is a CU/DU architecture
  • the master node after the master node obtains the activated TCI state information by parsing the interface message, the CU of the master node sends the activated TCI state information to the DU of the master node, and then the DU of the master node generates a MAC CE, And send the generated MAC CE to the UE.
  • the first information may further include third indication information.
  • the third indication information is used to indicate that the above-mentioned activated TCI state information is the TCI state information of the SCG.
  • the first information is an RRC message or a MAC CE
  • the first information contains The above-mentioned third indication information is also included.
  • the UE when the MAC layer of the UE receives the indication information that a certain number of beams of the PSCell fail (that is, indicating that the beams of the PSCell have failed), the UE will trigger a random connection on the PSCell.
  • the MAC layer of the UE receives the indication information that a certain number of beams of the SCell in the secondary node fail (that is, indicating that the beam of the SCell fails)
  • the UE sends the BFR MAC CE to the secondary node.
  • the method of how the UE initiates the random access procedure to the SCG has not yet been determined, which results in the UE not being able to initiate the random access procedure in the SCG, and thus unable to complete the pairing process.
  • the link recovery process of PSCell in addition, when the SCG is in the deactivated state, the UE may not send uplink data to the SCG, that is, the BFR MAC CE cannot be sent.
  • an embodiment of the present application provides a communication method, which is used in the case where the SCG is in a deactivated state, and when the beam failure of the PSCell or the SCell is detected, the UE can perform a random access procedure in the PSCell, or the UE can perform a random access procedure in the PSCell.
  • a BFR MAC CE can be sent to the secondary node to complete the link recovery process to PSCell or SCell.
  • the method includes the following steps:
  • the UE fails to detect the beam of the first cell in the SCG.
  • the SCG is in a deactivated state, and the first cell is a PSCell or an SCell in the SCG.
  • the beam failure of the first cell in the SCG may refer to: when the MAC layer of the UE receives a beam failure indication information of the first cell of an SCG from the physical layer, the MAC layer of the UE will start or restart a beam failure. Timer, and record the number of beam failure indication information currently received plus 1. If the MAC layer of the UE receives a certain number of beam failure indication information of the first cell before the timer expires, it is considered that the beam of the first cell in the SCG has failed.
  • the UE initiates a random access procedure at the first BWP of the PSCell in the SCG.
  • the first cell is a PSCell
  • the UE detects that the beam of the PSCell fails the BWP of the PSCell in the SCG initiates a random access procedure.
  • the successful completion of the link recovery process to the PSCell is ensured.
  • the UE When the first cell is an SCell, when the UE detects that the beam of the SCell fails, the BWP of the PSCell in the SCG initiates a random access procedure. In this way, the UE can send uplink data to the SCG through the PSCell, that is, send the BFR MAC CE, thereby ensuring the successful completion of the link recovery process to the SCell.
  • the method when the first cell is an SCell, the method further includes:
  • the UE After the random access procedure initiated by the first BWP is successful, the UE sends the first MAC CE to the secondary node.
  • the first MAC CE is used to indicate the beam failure of the first cell.
  • the first BWP may be the initial BWP of the PSCell.
  • the above method further includes:
  • the UE switches from the first BWP to the dormant BWP of the PSCell.
  • the link recovery process for the PSCell is completed, and then the PSCell can be switched from the first BWP to the dormant BWP of the PSCell.
  • Restoring to the deactivated state saves the power of the UE, and at the same time reduces the network side re-sending the command to enter the deactivated state to the UE, and also reduces the overhead.
  • the UE when the first cell is an SCell, as described in S202 above, after the UE initiates the random access procedure in the first BWP, the UE can send a BFR MAC CE to the SCG through the PSCell to complete the link recovery process for the SCell. Then switch from the first BWP to the dormant BWP of the PSCell, so that the PSCell can be restored to the deactivated state, so as to save the power of the UE, and at the same time, the network side re-sends the command to the UE to enter the dormant BWP, and the overhead is also reduced.
  • the first BWP may be the dormant BWP of the PSCell.
  • the communication method shown in FIG. 9 may be applied to the method shown in FIG. 3 to solve the problem in the method shown in FIG. 3 .
  • the technical problem solved by the method shown in FIG. 9 realizes the technical effect achieved by the method shown in FIG. 9 .
  • the UE when the SCG of the UE is in a deactivated state, the UE first obtains the first evaluation result of the contact signal instruction of the SCG according to the first evaluation period. Then, the UE performs a link recovery process on the SCG according to the first evaluation result.
  • the link recovery process if the MAC layer of the UE receives the indication information that a certain number of beams of the first cell fail, it means that the beams of the first cell fail.
  • the physical layer of the UE reports the beam failure indication information to the MAC layer.
  • the MAC layer of the UE receives the indication information that a certain number of beams of the PSCell fail, it means that the beams of the first cell fail.
  • the UE can initiate a random access procedure through the first BWP of the PSCell in the SCG, thereby ensuring that the link recovery procedure to the first cell can be successfully completed.
  • the embodiment of the present application provides a communication method, which is used in the case where the SCG of the UE is in a deactivated state, when a beam failure of the PSCell or the SCell is detected, the link recovery process for the PSCell or the SCell is completed.
  • the method includes the following steps:
  • the UE sends fourth indication information to the secondary node through the primary node.
  • the fourth indication information is used to indicate beam failure of the first cell in the SCG.
  • the fourth indication information is used to instruct the UE to prepare to perform the beam recovery process in the first cell.
  • the first cell may be a PSCell or an SCell in the SCG.
  • indicating the beam failure of the first cell in the SCG refers to: when the MAC layer of the UE receives a beam failure indication information of the first cell of the SCG from the physical layer, the MAC layer of the UE will start or restart a beam failure. Timer, and record the number of beam failure indication information currently received plus 1. If the MAC layer of the UE receives a certain number of beam failure indication information of the first cell before the timer expires, it is considered that the beam of the first cell in the SCG has failed.
  • the fourth indication information may also carry an index of a candidate beam whose signal quality measured by the UE in the SCell is better than a certain threshold.
  • the secondary node receives the fourth indication message from the primary node.
  • the UE sends the fourth indication information to the secondary node through the primary node, so that the secondary node can be notified of the beam failure of the first cell (PSCell or SCell) on the premise that the UE does not send uplink data to the secondary node.
  • the communication method shown in FIG. 10 may be applied to the method shown in FIG. 3 to solve the problem in the method shown in FIG. 3 .
  • the technical problem solved by the method shown in FIG. 10 realizes the technical effect achieved by the method shown in FIG. 10 .
  • the UE when the SCG of the UE is in a deactivated state, the UE first obtains the first evaluation result of the contact signal instruction of the SCG according to the first evaluation period. Then, the UE performs a link recovery process on the SCG according to the first evaluation result.
  • the link recovery process if the MAC layer of the UE receives the indication information that a certain number of beams of the first cell fail, it means that the beams of the first cell fail.
  • the physical layer of the UE reports the beam failure indication information to the MAC layer.
  • the MAC layer of the UE receives the indication information that a certain number of beams of the PSCell fail, it means that the beams of the first cell fail.
  • the UE can send the fourth indication information to the secondary node through the primary node, and then can notify the secondary node of the first cell (PSCell or SCell) on the premise that the UE does not send uplink data to the secondary node. ) beam fails.
  • the UE and/or the network device may perform some or all of the steps in the embodiments of the present application. These steps or operations are only examples. In the embodiments of the present application, other operations or various operations may also be performed. Variation of an operation. In addition, various steps may be performed in different orders presented in the embodiments of the present application, and may not be required to perform all the operations in the embodiments of the present application.
  • the embodiments provided in this application may be related to each other, and may be referred to or referenced to each other.
  • the above embodiments mainly introduce the solutions provided by the embodiments of the present application from the perspective of interaction between devices.
  • the above-mentioned UE or the master node or the auxiliary node includes corresponding hardware structures and/or software modules for executing each function.
  • the unit of each example described in conjunction with the embodiments disclosed herein can be implemented in hardware or in the form of a combination of hardware and computer software. Whether a function is performed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.
  • the device including the UE or the master node or the auxiliary node
  • each functional module may be divided corresponding to each function, or two or more functions may be integrated. in a processing module.
  • the above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules.
  • the division of modules in the embodiment of the present application is schematic, and is only a logical function division, and another division manner may be used in actual implementation.
  • FIG. 11 it is a schematic diagram of the composition of a communication apparatus 40 according to an embodiment of the present application.
  • the communication device 40 may be a chip or a system on a chip in the UE.
  • the communication apparatus 40 may be used to perform the functions of the UE involved in the above embodiments.
  • the communication device 40 includes:
  • a processing unit 401 configured to obtain a first evaluation result of the link signal quality of the SCG according to a first evaluation period when the SCG of the secondary cell group of the UE is in a deactivated state;
  • the processing unit 401 is further configured to obtain a second evaluation result of the link signal quality of the SCG according to the second evaluation period when the SCG is in an active state;
  • the processing unit 401 is further configured to perform wireless link monitoring or a link recovery process on the SCG according to the first evaluation result or the second evaluation result.
  • the communication device 40 further includes:
  • the receiving unit 402 is configured to receive first indication information from a network device; the first indication information is used to indicate the first evaluation period; the network device is a master node or a secondary node of the UE.
  • the communication device 40 further includes:
  • a receiving unit 402 configured to receive first indication information from a network device; the first indication information is used to indicate a first scaling factor; the network device is a master node or a secondary node of the UE;
  • the processing unit 401 is further configured to determine the first evaluation period according to the third evaluation period and the first scaling factor.
  • the first evaluation period is an evaluation period corresponding to a predetermined discontinuous reception DRX period.
  • the processing unit 401 is further configured to make the physical layer of the UE report the indication information corresponding to the first evaluation result to the upper-layer protocol stack according to the first indication period, or, according to the second indication period, causing the physical layer of the UE to report the indication information corresponding to the second evaluation result to the upper-layer protocol stack.
  • the receiving unit 402 is configured to receive second indication information from a network device; the second indication information is used to indicate the first indication period; the network device is the master of the UE node or secondary node.
  • the receiving unit 402 is configured to receive second indication information from a network device; the second indication information is used to indicate a second scaling factor; the network device is the master node of the UE or Secondary node.
  • the processing unit 401 is further configured to determine the first indication period according to the third indication period and the second scaling factor.
  • the first indication period is an indication period corresponding to a predetermined DRX period.
  • the receiving unit 402 is configured to receive first information from a master node when the SCG is in a deactivated state; the first information includes: activation transmission configuration indication TCI state information; the Activate TCI status information for the UE to receive the physical downlink control channel PDCCH of the SCG;
  • the processing unit 401 is further configured to obtain the first evaluation result of the link signal quality of the SCG according to the first evaluation period based on the reference signal corresponding to the activated TCI state information.
  • the first information is a first RRC message
  • the first RRC message includes a second RRC message
  • the activated TCI state information is included in the second RRC message
  • the first RRC message includes a second RRC message.
  • the second RRC message is the RRC message from the secondary node.
  • the first information is an RRC message or a MAC CE.
  • the first information further includes third indication information, where the third indication information is used to indicate that the activated TCI state information is the TCI state information of the SCG.
  • FIG. 12 it is a schematic diagram of the composition of another communication apparatus 50 according to an embodiment of the present application.
  • the communication apparatus 50 may be a chip or a system-on-chip in a network device (eg, a master node or a slave node of a UE).
  • the communication apparatus 50 may be used to perform the functions of the network equipment involved in the above embodiments.
  • the communication device 50 includes:
  • a sending unit 501 is configured to send first indication information to a UE; the first indication information is used to indicate a first evaluation period or a first scaling factor; the network device is the master node of the UE or A secondary node; wherein the first evaluation period is used to instruct the UE to obtain a first evaluation result according to the first evaluation period when the secondary cell group SCG is in a deactivated state; the first evaluation result is used for Perform radio link monitoring or a link recovery process on the SCG; the first scaling factor is used to instruct the UE to determine the first evaluation period according to the third evaluation period and the first scaling factor.
  • the sending unit 501 is further configured to send second indication information to the UE; the second indication information is used to indicate a first indication period or a second scaling factor; wherein the first indication An indication period is used to instruct the UE to report the first evaluation result to the upper-layer protocol stack according to the first indication period; the second scaling factor is used to instruct the UE to report the first evaluation result to the upper layer protocol stack according to the first indication period; The third indication period and the second scaling factor determine the first indication period.
  • FIG. 13 it is a schematic diagram of the composition of another communication apparatus 60 according to an embodiment of the present application.
  • the communication device 60 may be a chip or a system-on-chip in the master node.
  • the communication device 60 may be used to perform the functions of the master node involved in the above embodiments.
  • the communication device 60 includes:
  • a receiving unit 601 configured to receive second information from a secondary node, where the second information includes activated transmission configuration indication TCI status information; the activated TCI status information is used by the UE to receive the secondary cell group of the secondary node The physical downlink control channel PDCCH of the SCG; wherein, the SCG is in a deactivated state;
  • a sending unit 602 configured to send first information to the UE, where the first information includes the activated TCI state information.
  • the second information is a second radio resource control RRC message
  • the first information is a first RRC message
  • the first RRC message includes the second RRC message
  • the first information is an RRC message or a medium access control element MAC CE.
  • the first information further includes third indication information, where the third indication information is used to indicate that the activated TCI state information is the TCI state information of the SCG.
  • FIG. 14 it is a schematic diagram of the composition of another communication apparatus 70 according to an embodiment of the present application.
  • the communication device 70 may be a chip or a system-on-chip in the secondary node.
  • the communication apparatus 70 may be used to perform the functions of the secondary node involved in the above embodiments.
  • the communication device 70 includes:
  • the sending unit 701 is configured to send second information to the master node, where the second information includes TCI status information of an active transmission configuration indication; the active TCI status information is used for the UE to receive the secondary cell group SCG of the secondary node The physical downlink control channel PDCCH; wherein, the SCG is in a deactivated state.
  • the second information is an RRC message sent by the secondary node to the primary node, or the second information is an interface message between the secondary node and the primary node.
  • FIG. 15 it is a schematic diagram of the composition of another communication apparatus 80 according to an embodiment of the present application.
  • the communication device 80 may be a chip or a system-on-chip in the UE.
  • the communication apparatus 80 may be used to perform the functions of the UE involved in the above embodiments.
  • the communication device 80 includes:
  • a processing unit 801 configured to detect beam beam failure of a first cell in a secondary cell group SCG; wherein, the SCG is in a deactivated state; the first cell is the PSCell or the secondary cell SCell in the SCG;
  • the processing unit 801 is further configured to initiate a random access procedure in the first part of the bandwidth BWP of the primary and secondary cells PSCell in the SCG.
  • the first BWP is the initial BWP of the PSCell.
  • the processing unit 801 is further configured to switch from the initial BWP to the dormant dormant BWP of the PSCell after the random access process.
  • the first BWP is the dormant dormant BWP of the PSCell.
  • the communication apparatus 80 when the first cell is an SCell, the communication apparatus 80 further includes:
  • the sending unit 802 is configured to send a first medium access control control element MAC CE to the secondary node after the random access process is successful; the first MAC CE is used to indicate that the beam of the first cell fails.
  • FIG. 16 it is a schematic diagram of the composition of another communication apparatus 90 according to an embodiment of the present application.
  • the communication device 90 may be a chip or a system-on-chip in the UE.
  • the communication apparatus 90 may be used to perform the functions of the UE involved in the above embodiments.
  • the communication device 90 includes:
  • the sending unit 901 is configured to send fourth indication information to the secondary node through the master node when the secondary cell group SCG is in a deactivated state; the fourth indication information is used to indicate that the beam beam of the first cell in the SCG fails ; the first cell is the PSCell or the secondary cell SCell in the SCG.
  • the fourth indication information is an RRC message, or the fourth indication information is a MAC CE.
  • FIG. 17 it is a schematic diagram of the composition of another communication apparatus 100 according to an embodiment of the present application.
  • the communication apparatus 100 may be a chip or a system-on-chip in the secondary node of the UE.
  • the communication apparatus 100 may be used to perform the functions of the secondary node involved in the above embodiments.
  • the communication device 100 includes:
  • the receiving unit 1001 is configured to receive a fourth indication message from the master node of the UE, where the fourth indication message is used to indicate beam beam failure of the first cell in the secondary cell group SCG.
  • the fourth indication information is an RRC message, or the fourth indication information is a MAC CE.
  • FIG. 18 shows a schematic composition diagram of a communication device 110 .
  • the communication device 110 includes: at least one processor 1101 and at least one interface circuit 1104 .
  • the communication device 110 may further include a communication line 1102 and a memory 1103.
  • the processor 1101 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more processors used to control the execution of the programs of the present application. integrated circuit.
  • CPU central processing unit
  • ASIC application-specific integrated circuit
  • Communication line 1102 may include a path to communicate information between the components described above.
  • Interface circuit 1104 using any transceiver-like device, for communicating with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc. .
  • RAN radio access network
  • WLAN wireless local area networks
  • Memory 1103 may be read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM) or other types of information and instructions It can also be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disk storage, CD-ROM storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or capable of carrying or storing program code in the form of instructions or data structures and capable of being accessed by a computer any other medium, but not limited to.
  • the memory may exist independently and be connected to the processor through communication line 1102 . The memory can also be integrated with the processor.
  • the memory 1103 is used for storing computer-executed instructions for executing the solution of the present application, and the execution is controlled by the processor 1101 .
  • the processor 1101 is configured to execute the computer-executed instructions stored in the memory 1103, thereby implementing the communication method provided by the embodiment of the present application.
  • the communication device 110 when the processor 1101 executes the instructions stored in the memory 1103, the communication device 110 is caused to execute S101-S104 shown in FIG. 3 , FIGS. 6-7 , and S105 shown in FIG. 4 . , S106 and S107 shown in FIG. 5 , S108 shown in FIG. 6 , S109 and S110 shown in FIG. 7 , S112 and S113 shown in FIG. 8 , and other operations that the UE needs to perform.
  • the communication device 110 when the processor 1101 executes the instructions stored in the memory 1103, the communication device 110 is caused to execute S105 shown in FIG. 4, S106 shown in FIG. 5, S108 shown in FIG. 6, and S108 shown in FIG. 7. S109 shown, and other operations that the network device needs to perform.
  • the communication device 110 when the processor 1101 executes the instructions stored in the memory 1103, the communication device 110 is caused to perform S111 and S112 as shown in FIG. 8, as well as other operations that the master node needs to perform.
  • the communication device 110 when the processor 1101 executes the instructions stored in the memory 1103, the communication device 110 is caused to perform S111 as shown in FIG. 8, and other operations that the secondary node needs to perform.
  • the communication device 110 when the processor 1101 executes the instructions stored in the memory 1103, the communication device 110 is caused to perform S201-S204 as shown in FIG. 9, and other operations that the UE needs to perform.
  • the communication device 110 when the processor 1101 executes the instructions stored in the memory 1103, the communication device 110 is caused to perform S301 as shown in FIG. 10, and other operations that the UE needs to perform.
  • the communication device 110 when the processor 1101 executes the instructions stored in the memory 1103, the communication device 110 is caused to perform S302 as shown in FIG. 10, and other operations that the secondary node needs to perform.
  • the computer-executed instructions in the embodiment of the present application may also be referred to as application code, which is not specifically limited in the embodiment of the present application.
  • the processor 1101 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 18 .
  • the apparatus 1100 may include multiple processors, such as the processor 1101 and the processor 1107 in FIG. 18 .
  • processors can be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor.
  • a processor herein may refer to one or more devices, circuits, and/or processing cores for processing, eg, computer data (computer program instructions).
  • the apparatus 1100 may further include an output device 1105 and an input device 1106 .
  • the output device 1105 is in communication with the processor 1101 and can display information in a variety of ways.
  • the output device 1105 may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector (projector) Wait.
  • the input device 1106 is in communication with the processor 1101 and can receive user input in a variety of ways.
  • the input device 1106 may be a mouse, a keyboard, a touch screen device, a sensor device, or the like.
  • the embodiment of the present application further provides a computer-readable storage medium, where an instruction is stored in the computer-readable storage medium, and when the instruction is executed, the method provided by the embodiment of the present application is executed.
  • Embodiments of the present application also provide a computer program product including instructions. When it runs on a computer, the computer can execute the methods provided by the embodiments of the present application.
  • the embodiment of the present application also provides a chip.
  • the chip includes a processor.
  • the processor executes the computer program instructions
  • the chip can execute the method provided by the embodiments of the present application.
  • the instruction can come from memory inside the chip or from memory outside the chip.
  • the chip also includes an input and output circuit as a communication interface.
  • Embodiments of the present application further provide a communication system, including a first node and a second node.
  • the first node is configured to perform operations that need to be performed by the master node of the UE in the foregoing embodiments of the present application
  • the second node is configured to perform operations that need to be performed by the secondary node of the UE in the foregoing embodiments of the present application.
  • the first node is configured to execute S111-S112 in FIG. 8, receive the second information from the second node and send the first information to the terminal device.
  • the second node is configured to execute S111 in FIG. 8 and send the second information to the first node.
  • the functions or actions or operations or steps in the above embodiments may be implemented in whole or in part by software, hardware, firmware or any combination thereof.
  • a software program When implemented using a software program, it can be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, all or part of the processes or functions described in the embodiments of the present application are generated.
  • the computer may be a general purpose computer, special purpose computer, computer network, or other programmable device.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server, or data center by wire (eg, coaxial cable, optical fiber, digital subscriber line, DSL) or wireless (eg, infrared, wireless, microwave, etc.).
  • the computer-readable storage medium can be any available medium that can be accessed by a computer or data storage devices including one or more servers, data centers, etc. that can be integrated with the medium.
  • the usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, DVDs), or semiconductor media (eg, solid state disks (SSDs)), and the like.

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

Abstract

L'invention concerne un procédé et un appareil de communication, qui se rapportent au domaine technique des communications. Le procédé est utilisé pour réduire la consommation d'énergie d'un équipement terminal. Le procédé comprend les étapes suivantes : lorsqu'un groupe de cellules secondaires (SCG) d'un équipement terminal est dans un état désactivé, l'équipement terminal acquiert, selon une première période d'évaluation, un premier résultat d'évaluation de la qualité de signal de liaison du SCG ; lorsque le SCG est dans un état activé, l'équipement terminal acquiert, selon une seconde période d'évaluation, un second résultat d'évaluation de la qualité de signal de liaison du SCG ; et l'équipement terminal effectue un processus de surveillance de liaison sans fil ou de récupération de liaison sur le SCG en fonction du premier résultat d'évaluation ou du second résultat d'évaluation.
PCT/CN2020/107660 2020-08-07 2020-08-07 Appareil et procédé de communication WO2022027543A1 (fr)

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