WO2021164747A1 - 通信方法及装置 - Google Patents
通信方法及装置 Download PDFInfo
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- WO2021164747A1 WO2021164747A1 PCT/CN2021/076955 CN2021076955W WO2021164747A1 WO 2021164747 A1 WO2021164747 A1 WO 2021164747A1 CN 2021076955 W CN2021076955 W CN 2021076955W WO 2021164747 A1 WO2021164747 A1 WO 2021164747A1
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- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
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- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
- H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
- H04W52/0232—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal according to average transmission signal activity
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Definitions
- This application relates to the field of communication, and in particular to a communication method and device.
- the terminal device can communicate with multiple access network devices, for example, the terminal device can communicate with the master node at the same time
- the primary cell group (master cell group, MCG) on the (master node, MN) communicates with the secondary cell group (secondary cell group, SCG) on the secondary node (secondary node, SN).
- the SCG can be transmitted in the SCG with little or no data transmission, or when the required data rate is low, the SCG can be suspended or suspended (store or suspend), so as to reduce the power consumption of the terminal device.
- the terminal device when the SCG of the terminal device is suspended, if the terminal device detects that the MCG has a radio link problem, the terminal device will initiate an RRC re-establishment process to restore the MCG, which will cause the terminal device to communicate with the wireless Communication between networks is interrupted.
- the embodiments of the application provide a communication method and device, which can solve the problem that when the SCG is suspended and the MCG has a link problem or the signal quality deteriorates, the terminal device may not be able to communicate normally with the network side, thereby improving communication reliability. sex.
- a communication method includes: when it is detected that the MCG of the primary cell group has a link problem, or the signal quality of the MCG is lower than the signal quality threshold, the terminal device resumes the suspended secondary cell group SCG.
- the MCG is managed by the primary node, and the SCG is managed by the secondary node.
- the terminal device when the terminal device detects that the MCG has a link problem or the signal quality of the MCG has deteriorated, that is, when the terminal device learns that the communication quality with the master node on the MCG has deteriorated, the terminal device The suspended SCG can be resumed, that is, the communication between the terminal device and the secondary node on the SCG can be resumed, thereby improving the reliability of the communication between the terminal device and the wireless network.
- the terminal device resumes the suspended secondary cell group SCG, which can be implemented in one of the following ways: activating the SCG that has been deactivated ( deactivated) part or all of the cells, wakeup (wakeup) some or all of the cells in the dormant state (domancy) in the SCG, discontinuous reception (DRX) and/or discontinuity implemented by some or all of the cells in the SCG Send (discontinuous transmission, DTX) or only resume signaling transmission in SCG.
- activating the SCG that has been deactivated ( deactivated) part or all of the cells wakeup (wakeup) some or all of the cells in the dormant state (domancy) in the SCG, discontinuous reception (DRX) and/or discontinuity implemented by some or all of the cells in the SCG Send (discontinuous transmission, DTX) or only resume signaling transmission in SCG.
- DRX discontinuous reception
- DTX discontinuous transmission
- the terminal equipment can only resume the transmission between the terminal equipment and the suspended cell in the SCG, such as the transmission between the primary and secondary cells, or resume multiple suspended cells in the terminal equipment and the SCG, such as primary and secondary cells and at least Transmission between a secondary cell.
- restoring the transmission between the terminal device and the cell may include: only restoring the transmission between the terminal device and the cell on the signaling radio bearer, that is, only restoring the signaling transmission, or Resuming the transmission between the terminal equipment and the cell on the signaling radio bearer, and the transmission between the terminal equipment and the cell on the data radio bearer, that is, resuming the signaling transmission and data transmission at the same time.
- the embodiment of the present application does not specifically limit the implementation manner of the terminal device suspending and resuming the SCG.
- the above-mentioned terminal device resuming the suspended secondary cell group SCG may include: the terminal device resuming transmission with the SCG on the offload signaling radio bearer SRB1 and/or the signaling radio bearer SRB3.
- the terminal device can actively resume signaling transmission with the secondary node, thereby improving communication reliability.
- the terminal device can also resume data transmission with the secondary node, such as the data radio bearer DRB between the terminal device and the SCG.
- the terminal device may include a radio resource control (radio resource control, RRC) layer entity and a packet data convergence protocol (packet data convergence protocol, PDCP) layer entity.
- RRC radio resource control
- PDCP packet data convergence protocol
- the communication method described in the first aspect may further include: the radio resource control RRC layer entity of the terminal device sends the first indication information to the packet data convergence protocol PDCP layer entity of the terminal device. Wherein, the first indication information is used to indicate to restore the SCG.
- the communication method described in the first aspect may further include: the terminal device sends the second indication information to the master node through the secondary node.
- the second indication information is used to indicate that the MCG has a link problem or that the MCG has a link problem.
- the master node can restore the MCG accordingly, such as instructing the terminal device to perform a handover process or a reconfiguration process, thereby further improving communication reliability.
- the communication method described in the first aspect may further include: after the secondary node accepts the random access request initiated by the terminal device, the terminal device sends the second indication information to the primary node through the secondary node.
- the second indication information may be included in the first message for transmission.
- the first message may be an MCG failure message, or another message including the MCG failure message, which is not specifically limited in the embodiment of the present application.
- the communication method described in the first aspect may further include: the terminal device receives a response message of the first message from the master node through the secondary node.
- the response message of the first message may be an RRC reconfiguration message, that is, the response message of the first message may be used to restore the MCG, so as to further improve communication reliability.
- the RRC reconfiguration message can also be used to instruct the terminal device to suspend the SCG, so as to save the power consumption of the terminal device.
- the response message of the first message may also be an RRC release message, that is, the response message of the first message may also be used to release the RRC connection to notify the terminal device that the network side cannot recover the MCG. By releasing the RRC connection, the power consumption of the terminal equipment is saved.
- the communication method described in the first aspect may further include: after detecting that the MCG has a link problem, or the signal quality of the MCG is lower than the signal quality threshold, the terminal device sends the maximum signal to the SCG.
- the transmission power is the first maximum transmission power.
- the first maximum transmission power is greater than the second maximum transmission power
- the second maximum transmission power is the maximum transmission power at which the terminal device sends a signal to the SCG before the SCG is suspended.
- the terminal device can send signals, such as a random access request and the above-mentioned first message, to the SCG with as much transmission power as possible, so as to restore the SCG as soon as possible, thereby further improving communication reliability.
- the communication method described in the first aspect may further include: the terminal device sends a signal to the SCG in the first time period.
- the first time period includes the time period during which the terminal device sends a signal to the MCG and the time period during which the terminal device sends a signal to the SCG according to the time division multiplexing pattern between the MCG and the SCG. That is to say, the terminal device does not need to consider the limitation of time division multiplexing between MCG and SCG, that is, the terminal device can send signals to the SCG during all the time periods originally used to send signals to the MCG and SCG, so as to recover the SCG as soon as possible. Further improve communication reliability.
- the foregoing terminal device sending a signal to the SCG within the first time period may include: the terminal device sending a signal to the SCG starting from the first moment.
- the first moment is the earliest sending moment among the multiple sending moments in the first time period.
- the terminal device can send a signal to the SCG at the earliest sending moment, so as to recover the SCG as soon as possible, thereby further improving communication reliability.
- the terminal device may send a signal to the SCG at multiple sending moments in the first time period at the first maximum transmission power.
- the multiple sending moments in the first time period may include the foregoing first moment.
- a communication method includes: the secondary node restores the secondary cell group SCG in which the terminal equipment has been suspended. Among them, the secondary node is used to manage the SCG.
- the above-mentioned secondary node restoring the secondary cell group SCG in which the terminal equipment has been suspended may include: the secondary node restoring the terminal equipment and the SCG to offload signaling radio bearer SRB1 and/or signaling radio bearer SRB3 On the transmission.
- the communication method described in the second aspect may further include: the secondary node accepts a random access request initiated by the terminal device. Among them, the random access request is used to recover the SCG.
- the communication method described in the second aspect may further include: the secondary node receives the second indication information from the terminal device, and sends the second indication information to the master node.
- the master node is used to manage the primary cell group MCG of the terminal equipment, and the second indication information is used to indicate a link problem occurred in the MCG or indicate that a link problem occurred in the MCG.
- the second indication information may be included in the first message for transmission.
- the first message may be an MCG failure message, or another message including the MCG failure message, which is not specifically limited in the embodiment of the present application.
- the communication method of the second aspect may further include: the secondary node receives the response message of the first message from the master node, and sends the response message of the first message to the terminal device.
- the response message of the first message may be an RRC reconfiguration message or an RRC release message.
- the RRC reconfiguration message may also be used to instruct the terminal device to suspend the SCG.
- the communication method described in the second aspect may further include: the secondary node receives a signal from the terminal device within the first time period.
- the first time period may include a time period during which the terminal device sends a signal to the MCG and a time period during which the terminal device sends a signal to the SCG according to the time division multiplexing pattern between the MCG and the SCG.
- the foregoing secondary node receiving the signal from the terminal device within the first time period may include: the secondary node receiving the signal from the terminal device from the first moment.
- the first moment is the earliest sending moment among the multiple sending moments in the first time period.
- the technical effect of the communication method described in the second aspect may refer to the technical effect of the communication method described in the first aspect, which will not be repeated here.
- a communication method includes: the primary node receives the second indication information from the terminal device through the secondary node.
- the primary node is used to manage the primary cell group MCG
- the secondary node is used to manage the secondary cell group SCG
- the second indication information is used to indicate a link problem occurred in the MCG or indicate that a link problem occurred in the MCG. Then, the master node restores the MCG.
- the second indication information may be included in the first message for transmission.
- the first message may be an MCG failure message, or another message including the MCG failure message, which is not specifically limited in the embodiment of the present application.
- the communication method of the third aspect may further include: the master node sends a response message of the first message to the terminal device through the slave node.
- the response message of the first message may be an RRC reconfiguration message or an RRC release message.
- the RRC reconfiguration message can be used to instruct the terminal device to suspend the SCG.
- the communication method described in the third aspect may further include: the master node receives a signal from the terminal device through the slave node in the first time period.
- the first time period may include a time period during which the terminal device sends a signal to the MCG and a time period during which the terminal device sends a signal to the SCG according to the time division multiplexing pattern between the MCG and the SCG.
- the technical effect of the communication method described in the third aspect may refer to the technical effect of the communication method described in the first aspect, which will not be repeated here.
- a communication device in a fourth aspect, includes: a processing module and a transceiver module.
- the processing module is used to restore the suspended secondary cell group SCG when the control transceiver module detects that the MCG of the primary cell group has a link problem, or the signal quality of the MCG is lower than the signal quality threshold.
- the MCG is managed by the primary node, and the SCG is managed by the secondary node.
- the processing module is also used to resume transmission with the SCG on the offload signaling radio bearer SRB1 and/or the signaling radio bearer SRB3.
- the processing module may include a radio resource control RRC layer entity and a packet data convergence protocol PDCP layer entity.
- the RRC layer entity is used to send the first indication information to the PDCP layer entity.
- the first indication information is used to indicate to restore the SCG.
- the transceiver module is further configured to send the second indication information to the master node through the secondary node.
- the second indication information is used to indicate that the MCG has a link problem or that the MCG has a link problem.
- the transceiver module is further configured to, after the secondary node accepts the random access request initiated by the communication device described in the fourth aspect, send the second indication information to the primary node through the secondary node.
- the second indication information may be included in the first message for transmission.
- the first message may be an MCG failure message, or another message including the MCG failure message.
- the transceiver module is further configured to receive the response message of the first message from the master node through the secondary node.
- the response message of the first message may be an RRC reconfiguration message or an RRC release message.
- the RRC reconfiguration message may be used to instruct the terminal device to suspend the SCG.
- the processing module is also used to determine that the maximum transmission power of the signal sent by the communication device to the SCG is the first after detecting that the MCG has a link problem or the signal quality of the MCG is lower than the signal quality threshold.
- Maximum transmit power The first maximum transmission power is greater than the second maximum transmission power, and the second maximum transmission power is the maximum transmission power at which the communication device sends a signal to the SCG before the SCG is suspended.
- the transceiver module is also used to send a signal to the SCG in the first time period.
- the first time period includes a time period during which the communication device sends a signal to the MCG and a time period during which the communication device sends a signal to the SCG according to the time division multiplexing pattern between the MCG and the SCG.
- the transceiver module is also used to send a signal to the SCG from the first moment.
- the first moment is the earliest sending moment among the multiple sending moments in the first time period.
- the transceiver module may send a signal to the SCG at multiple sending moments in the first time period at the first maximum transmission power.
- the multiple sending moments in the first time period may include the foregoing first moment.
- the communication device may further include a storage module, and the storage module stores a program or instruction.
- the processing module executes the program or instruction
- the communication device described in the fourth aspect executes the communication method described in the first aspect.
- the communication device described in the fourth aspect may be a terminal device, or a chip (system) that can be installed in the terminal device or other components with terminal device functions, which is not limited in this application.
- the technical effect of the communication device described in the fourth aspect may refer to the technical effect of the communication method described in the first aspect, which will not be repeated here.
- a communication device is provided.
- the communication device is used to manage the SCG, and the communication device includes: a processing module and a transceiver module.
- the processing module is used to control the transceiver module to interact with the terminal device to restore the suspended secondary cell group SCG of the terminal device.
- the processing module is also used to restore the transmission between the terminal equipment and the SCG on the offload signaling radio bearer SRB1 and/or the signaling radio bearer SRB3.
- the transceiver module is also used to accept random access requests initiated by the terminal device.
- the random access request is used to recover the SCG.
- the transceiver module is further configured to receive the second indication information from the terminal device and send the second indication information to the master node.
- the master node is used to manage the primary cell group MCG of the terminal equipment, and the second indication information is used to indicate a link problem occurred in the MCG or indicate that a link problem occurred in the MCG.
- the second indication information may be included and sent in the first message.
- the first message may be an MCG failure message, or another message including the MCG failure message.
- the transceiver module is also used to receive the response message of the first message from the master node, and send the response message of the first message to the terminal device.
- the response message of the first message may be an RRC reconfiguration message or an RRC release message.
- the RRC reconfiguration message is used to instruct the terminal device to resume the MCG
- the RRC release message is used to instruct the terminal device to release the RRC connection.
- the RRC reconfiguration message may also be used to instruct the terminal device to suspend the SCG.
- the transceiver module is also used to receive signals from the terminal device in the first time period.
- the first time period includes the time period during which the terminal device sends a signal to the MCG and the time period during which the terminal device sends a signal to the SCG according to the time division multiplexing pattern between the MCG and the SCG.
- the transceiver module is also used to receive signals from the terminal device starting from the first moment.
- the first moment is the earliest sending moment among the multiple sending moments in the first time period.
- the communication device of the fifth aspect may further include a storage module, and the storage module stores a program or an instruction.
- the processing module executes the program or instruction
- the communication device according to the fifth aspect executes the communication method according to the second aspect.
- the communication device described in the fifth aspect may be a secondary node, or a chip (system) that can be installed in the secondary node or other components with secondary node functions, which is not limited in this application.
- the technical effect of the communication device described in the fifth aspect may refer to the technical effect of the communication method described in the first aspect, which will not be repeated here.
- a communication device is provided.
- the communication device is used to manage the MCG of the primary cell group.
- the communication device includes: a processing module and a transceiver module.
- the transceiver module is configured to receive the second indication information from the terminal device through the auxiliary node.
- the secondary node is used to manage the secondary cell group SCG, and the second indication information is used to indicate a link problem occurred in the MCG or indicate that a link problem occurred in the MCG.
- Processing module used to restore MCG.
- the second indication information may be included in the first message for transmission.
- the first message may be an MCG failure message, or another message including the MCG failure message, which is not specifically limited in the embodiment of the present application.
- the transceiver module is further configured to send a response message of the first message to the terminal device through the secondary node.
- the response message of the first message is an RRC reconfiguration message or an RRC release message.
- the RRC reconfiguration message is used to instruct the terminal device to resume the MCG
- the RRC release message is used to instruct the terminal device to release the RRC connection.
- the RRC reconfiguration message may also be used to instruct the terminal device to suspend the SCG.
- the transceiver module is also used to receive a signal from the terminal device through the auxiliary node in the first time period.
- the first time period includes the time period during which the terminal device sends a signal to the MCG and the time period during which the terminal device sends a signal to the SCG according to the time division multiplexing pattern between the MCG and the SCG.
- the communication device of the sixth aspect may further include a storage module, and the storage module stores a program or instruction.
- the processing module executes the program or instruction
- the communication device described in the sixth aspect can execute the communication method described in the third aspect.
- the communication device described in the sixth aspect may be a master node, or a chip (system) that can be installed in the master node or other components with the function of the master node, which is not limited in this application.
- the technical effect of the communication device described in the sixth aspect may refer to the technical effect of the communication method described in the first aspect, which will not be repeated here.
- a communication device configured to execute the communication method described in any one of the possible implementation manners of the first aspect to the third aspect.
- a communication device in an eighth aspect, includes a processor.
- the processor is configured to execute the communication method described in any one of the possible implementation manners of the first aspect to the third aspect.
- a communication device in a ninth aspect, includes a processor coupled with the memory.
- the memory is used to store a computer program; the processor is used to execute the computer program stored in the memory, so that the communication device executes the communication method described in any one of the possible implementation manners of the first aspect to the third aspect.
- the communication device described in the ninth aspect may further include a transceiver.
- the transceiver can be a transceiver circuit or an input/output interface.
- the transceiver can be used for the communication device to communicate with other communication devices.
- the communication device described in the ninth aspect may be a terminal device, a secondary node, or a master node, or a chip (system) or other component that may be installed in the terminal device, a secondary node, or the master node.
- the technical effects of the communication devices described in the seventh aspect to the ninth aspect may refer to the technical effects of the communication method described in the first aspect to the third aspect, and details are not described herein again.
- a chip system in a tenth aspect, includes a processor and an input/output port.
- the processor is used to implement the processing functions involved in the first to third aspects
- the input/output port is used to implement the processing functions involved in the first to third aspects. Send and receive functions.
- the chip system further includes a memory, and the memory is used to store program instructions and data for realizing the functions involved in the first aspect to the third aspect.
- the chip system can be composed of chips, or include chips and other discrete devices.
- a communication system supporting dual connections includes terminal equipment, auxiliary nodes and master nodes.
- a computer-readable storage medium includes a computer program or instruction; when the computer program or instruction runs on a computer, the computer executes the communication method described in any one of the possible implementation manners of the first aspect to the third aspect.
- the thirteenth aspect provides a computer program product.
- the computer program product includes a computer program or instruction, and when the computer program or instruction runs on a computer, the computer executes the communication method described in any one of the possible implementation manners of the first aspect to the third aspect.
- FIG. 1 is a schematic diagram of the architecture of a communication system supporting dual connectivity provided by an embodiment of the application;
- FIG. 2 is a schematic diagram of a control plane architecture of a communication system supporting dual connectivity provided by an embodiment of the application;
- FIG. 3 is a schematic diagram 1 of a user plane architecture of a communication system supporting dual connectivity provided by an embodiment of the application;
- FIG. 4 is a second schematic diagram of a user plane architecture of a communication system supporting dual connectivity provided by an embodiment of the application;
- FIG. 5 is a first structural diagram of a communication device provided by an embodiment of this application.
- FIG. 6 is a schematic flowchart of a communication method provided by an embodiment of this application.
- FIG. 7 is a schematic structural diagram of an access network device using a CU/DU architecture provided by an embodiment of the application.
- FIG. 8 is a second structural diagram of a communication device provided by an embodiment of this application.
- WiFi wireless fidelity
- V2X vehicle-to-everything
- device-to-device device-to-everything
- todevie (D2D) communication system car networking communication system
- 4th generation (4G) mobile communication system such as long term evolution (LTE) system, worldwide interoperability for microwave access, WiMAX
- 5G fifth generation mobile communication systems
- NR new radio
- 6G sixth generation
- the subscript sometimes as W 1 may form a clerical error at non-target as W1, while not emphasize the difference, to express their meaning is the same.
- FIG. 1 is a schematic structural diagram of a communication system supporting dual connectivity to which a communication method provided in an embodiment of the application is applicable.
- the communication system shown in FIG. 1 is taken as an example to describe in detail the communication system applicable to the embodiments of the present application.
- the solutions in the embodiments of the present application can also be applied to other mobile communication systems, and the corresponding names can also be replaced with the names of corresponding functions in other mobile communication systems.
- the communication system includes terminal equipment, primary nodes, secondary nodes, and a core network composed of one or more core network elements.
- the terminal device may have a wireless connection with the primary node and the secondary node respectively, that is, the wireless network may communicate with the terminal device in a dual-connection manner, so as to provide high-rate data transmission for the terminal device.
- dual connection can be implemented in multiple ways, as illustrated below.
- the terminal equipment is connected to the evolved Node B (evolved Node B, eNB) of the LTE standard as the primary node and the g node (g Node B) of the NR standard as the secondary node. gNB).
- the master node is an eNB connected to a fourth-generation core network (4th core network, CN), such as an evolved packet core network (EPC).
- CN fourth-generation core network
- EPC evolved packet core network
- the terminal equipment is connected to the evolved Node B (eNB) of the LTE standard as the master node and the g node (g Node) of the NR standard as the secondary node B, gNB).
- the master node is an eNB connected to the fifth generation core network (5th generation core, 5GC), and the master node may also be referred to as a next generation-eNB (ng-eNB).
- 5GC fifth generation core network
- ng-eNB next generation-eNB
- the terminal equipment is connected to the gNB as the primary node and the LTE standard eNB as the secondary node.
- the primary node is a gNB connected to the 5GC
- the secondary node is an eNB that provides data interaction with the 5GC for the terminal equipment, and is also called ng-eNB.
- the terminal device is connected to the gNB of the NR standard as the master node and the gNB of the NR standard as the secondary node.
- the master node is the gNB connected to the 5GC.
- FIG. 2 is a schematic diagram of a control plane (CP) architecture of a communication system supporting dual connectivity provided by an embodiment of the application.
- the node that performs direct control plane signaling interaction (through the NG-C interface) with the core network is called the master node (usually one), and does not directly interact with the core network.
- the control plane signaling interaction node is called a secondary node (there may be one or more, and only one is shown in Figure 2). It should be understood that the secondary node can interact with the master node through the control plane signaling, such as through the Xn-C interface, so as to achieve indirect control plane signaling interaction with the core network, that is, between the secondary node and the core network.
- the control plane signaling can be forwarded by the master node.
- the schematic diagram of the control plane architecture of the communication system supporting dual connectivity shown in FIG. 2 is illustrated with an example in which the core network is 5GC and the interface between the primary node and the secondary node is the Xn interface.
- the core network shown in FIG. 2 may also be a 4G core network, such as the EPC in the LTE system, and the control plane signaling interaction between the master node and the core network may be performed through the S1-C interface.
- the interface between the primary node and the secondary node may also be an X2 interface, and the control plane signaling interaction between the secondary node and the primary node may be performed through the X2-C interface.
- the embodiment of the present application does not specifically limit the implementation of the core network and the implementation of the interface between the primary node and the secondary node.
- both the primary node and the secondary node have radio resource control (radio resource control, RRC) layer entities, and both can generate control plane signaling, that is, various RRC messages, such as RRC setup/reset. Setup message, RRC configuration/reconfiguration message, RRC release message, measurement request message, etc.
- RRC radio resource control
- the master node can directly send the RRC message generated by the master node to the terminal device through the Uu port.
- the secondary node may directly send the RRC message generated by the secondary node to the terminal device through the Uu port.
- the terminal device may also directly send the RRC message generated by the terminal device to the secondary node through the Uu port, such as an RRC establishment/re-establishment complete message, an RRC configuration/reconfiguration complete message, and a measurement report.
- the secondary node can also first send the RRC message generated by the secondary node to the primary node through the control plane interface between the secondary node and the primary node, such as the Xn-C interface or the X2-C interface, and then send the RRC message generated by the secondary node to the primary node.
- the master node sends to the terminal device through the Uu port.
- the RRC message directly transmitted between the secondary node and the terminal device is carried in a signaling radio bearer (signalling radio bearer, SRB) 3.
- SRB signaling radio bearer
- control plane signaling interaction there is also user plane (CP) data interaction between the primary node and the core network, and between the primary node and the secondary node.
- CP user plane
- secondary node there may also be user plane data interaction between the secondary node and the core network.
- the following is an example.
- FIG. 3 is a schematic diagram 1 of a user plane architecture of a communication system supporting dual connectivity provided by an embodiment of the application, which is suitable for the above-mentioned EN-DC dual connectivity architecture.
- both the primary node and the secondary node have multiple radio link control (RLC) layer entities and media access control (MAC) layer entities, and the data wireless in dual connectivity
- the bearer may include one or more of MCG bearer (MCG bearer), SCG bearer (SCG bearer), and split bearer (split bearer).
- the MCG bearer refers to the RLC layer entity and MAC layer entity of the DRB only exist on the primary node
- the SCG bearer refers to the RLC layer entity and MAC layer entity of the DRB only exist on the secondary node
- the offload bearer refers to the DRB.
- the RLC layer entity and MAC layer entity exist on both the primary node and the secondary node.
- the PDCP-terminated bearer on the master node is called the MN terminated bearer, that is, the downlink (DL) data directly arrives at the master node from the core network and is processed by the PDCP layer entity of the master node , And then sent to the terminal device after being processed by the RLC layer entity and MAC layer entity of the primary node and/or secondary node; accordingly, uplink (UL) data arrives from the terminal device to the primary node and/or secondary node, and in the primary node The PDCP layer entity of the node sends it to the core network after processing.
- the PDCP-terminated bearer on the secondary node is called the SN terminated bearer, that is, the downlink data directly arrives at the secondary node from the core network, and is processed by the PDCP layer entity of the secondary node, and then passes through the primary node.
- the RLC layer entity and MAC layer entity of the node and/or secondary node are processed and sent to the terminal device; accordingly, the uplink data from the terminal device reaches the primary node and/or secondary node, and is processed by the PDCP layer entity of the secondary node to the core Send on the net.
- FIG. 4 is a schematic diagram 2 of the user plane architecture of the communication system supporting dual connectivity provided by an embodiment of the application, which is suitable for the above-mentioned dual connectivity architectures of NGEN-DC, NE-DC, and NR-DC, that is, the core network is 5GC Dual-connected architecture.
- the primary node and the secondary node also include service data adaptation protocol (SDAP) layer entities.
- SDAP service data adaptation protocol
- the SDAP layer entity is used to map the quality of service (QoS) flow (QoS flow) of the core network to the above-mentioned DRBs and send it to the terminal device when data is exchanged between the primary node or secondary node and the core network. Or map the data carried by each DRB to the QoS flow and send it to the core network.
- QoS quality of service
- the SDAP layer entity is used to map the quality of service (QoS) flow (QoS flow) of the core network to the above-mentioned DRBs and send it to the terminal device when data is exchanged between the primary node or secondary node and the core network.
- QoS flow quality of service
- the user plane of the secondary node may be connected to the core network connected to the primary node, that is, the core network can exchange data with the terminal device through the secondary node.
- the primary cell refers to the cell deployed at the primary frequency point and accessed when the terminal device initiates the initial connection establishment process or the RRC connection re-establishment process, or indicates the primary cell during the handover process.
- the primary and secondary cell can be the cell that the terminal device accesses during the random access process initiated to the secondary node, or the cell on another secondary node where the terminal device skips the random access process and initiates data transmission during the secondary node change process, or executes The cell on the secondary node accessed in the random access process is initiated during the synchronization reconfiguration process.
- the primary cell and the primary and secondary cells are collectively referred to as a special cell (SpCell).
- one or more secondary cells may also exist on the primary node.
- one or more secondary cells may also exist on the secondary node.
- the cells on the primary node that provide services for terminal equipment such as the primary cell and the secondary cells on the primary node, can be collectively referred to as MCG, and similarly, the cells on the secondary node that provide services for terminal equipment, such as primary and secondary cells, and secondary cells on the secondary node.
- the secondary cells can be collectively referred to as SCG.
- the special cell and the secondary cell may adopt a carrier aggregation (CA) manner to jointly provide transmission resources for terminal devices.
- CA carrier aggregation
- a serving cell For a terminal device in a connected state (RRC_CONNECTED), the cell that provides services for it is called a serving cell. It should be understood that for a terminal device that is not configured with DC/CA, its serving cell set only includes the primary cell, that is, there is only one serving cell for the terminal device. For a terminal device configured with DC/CA, its serving cell set may include the above-mentioned special cell and secondary cell, that is, there are multiple serving cells for the terminal device. Among them, each cell corresponds to a component carrier (CC).
- CC component carrier
- the above-mentioned primary node and secondary node can also be collectively referred to as radio access network (RAN) equipment or radio access network element or base station, which is located on the network side of the above-mentioned communication system and has wireless transceiver functions.
- RAN radio access network
- the access network equipment includes but is not limited to: access points (APs) in wireless fidelity (WiFi) systems, such as home gateways, routers, servers, switches, bridges, etc., evolved node B (evolved Node B, eNB), radio network controller (radio network controller, RNC), node B (Node B, NB), base station controller (base station controller, BSC), base transceiver station (base transceiver station, BTS) , Home base station (for example, home evolved Node B, or home Node B, HNB), 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 gNB in the new radio (NR) system, or transmission point (TRP or TP), one or a group of base stations (including multiple antennas) in the 5G system (Panel) antenna panel, or, it can also be a network node that constitutes
- the above-mentioned terminal equipment is a terminal that is connected to the above-mentioned communication system and has a wireless transceiver function, or a chip (system) that can be installed in the equipment or other components with terminal functions.
- the terminal device may also be called a user device, an access terminal, a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user device.
- the terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (VR) terminal device, and an augmented reality (AR) terminal Equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grid, transportation safety ( Wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, vehicle-mounted terminals, RSUs with terminal functions, etc.
- the terminal device of the present application may also be a vehicle-mounted module, vehicle-mounted module, vehicle-mounted component, vehicle-mounted chip, or vehicle-mounted unit built into a vehicle as one or more components or units. The vehicle passes through the built-in vehicle-mounted module, vehicle-mounted module, The on-board component, on-board chip or on-board unit can implement the communication method provided in this application.
- the above-mentioned core network elements are also called core network equipment, which refers to the equipment in the core network (CN) that provides service support for terminal equipment, including but not limited to: access and mobility management functions (access and mobility management). function, AMF) network element, session management function (SMF) network element, user plane function (UPF) network element, etc.
- AMF access and mobility management functions
- SMF session management function
- UPF user plane function
- the AMF network element may be responsible for terminal device access management and mobility management
- the SMF network element may be responsible for session management, such as session establishment, modification, etc.
- the UPF network element may be a user plane functional entity, mainly responsible for obtaining data from external networks, such as data network (DN).
- DN data network
- the network element in this application may also be referred to as an entity or a functional entity.
- an AMF network element may also be referred to as an AMF entity or an AMF functional entity.
- the SMF network element may also be referred to as an SMF entity or an SMF functional entity.
- the communication method provided by the embodiment of the present application may be applicable to the communication between the terminal device and the secondary node and/or the primary node shown in FIG. 1 and the communication between the secondary node and the primary node.
- FIGS. 1 to 4 are only simplified schematic diagrams for ease of understanding and examples.
- the communication system may also include other network devices and/or other terminal devices, which are not shown in FIGS. 1 to 4.
- FIG. 5 is a structural schematic diagram 1 of a communication device provided in an embodiment of this application.
- the communication device may be a terminal device or a secondary node or a master node, and may also be a chip (system) or other component that can be applied to a terminal device, a secondary node or the master node.
- the communication device 500 may include a processor 501.
- the communication device 500 may further include a memory 502 and/or a transceiver 503.
- the processor 501 may be coupled with the memory 502 and/or the transceiver 503, for example, there is an electrical signal connection between each other.
- the processor 501 is the control center of the communication device 500, and may be a processor or a collective term for multiple processing elements.
- the processor 501 is one or more central processing units (CPU), or an application specific integrated circuit (ASIC), or is configured to implement one or more of the embodiments of the present application.
- An integrated circuit for example: one or more microprocessors (digital signal processors, DSP), or one or more field programmable gate arrays (FPGA).
- the processor 501 can execute various functions of the communication device 500 by running or executing a software program stored in the memory 502 and calling data stored in the memory 502.
- the processor 501 may include one or more CPUs, such as CPU0 and CPU1 shown in FIG. 5.
- the communication device 500 may also include multiple processors, such as the processor 501 and the processor 504 shown in FIG. 5. Each of these processors can be a single-core processor (single-CPU) or a multi-core processor (multi-CPU).
- the processor here may refer to one or more communication devices, circuits, and/or processing cores for processing data (for example, computer program instructions).
- the memory 502 can be a read-only memory (ROM) or other types of static storage communication devices that can store static information and instructions, a random access memory (RAM), or can store information and instructions.
- Other types of dynamic storage communication equipment can also be electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical discs Storage, optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage communication devices, or can be used to carry or store desired programs in the form of instructions or data structures Code and any other medium that can be accessed by the computer, but not limited to this.
- the memory 502 may be integrated with the processor 501, or may exist independently, and is coupled with the processor 501 through the input/output port (not shown in FIG. 5) of the communication device 500, which is not specifically limited in the embodiment of the present application.
- the memory 502 is used to store a software program for executing the solution of the present application, and is controlled by the processor 501 to execute.
- the transceiver 503 is used to implement communication with other communication devices.
- the communication apparatus 500 is a terminal device, and the transceiver 503 may be used to communicate with the primary node and/or the secondary node, or to communicate with another terminal device.
- the communication apparatus 500 is an access network device, such as the aforementioned master node or auxiliary node, and the transceiver 503 may be used to communicate with a terminal device, or to communicate with another access network device, or to communicate with a core network element.
- the transceiver 503 may include a receiver and a transmitter (not separately shown in FIG. 5). Among them, the receiver is used to realize the receiving function, and the transmitter is used to realize the sending function.
- the transceiver 503 may be integrated with the processor 501, or may exist independently, and is coupled with the processor 501 through the input/output port (not shown in FIG. 5) of the communication device 500, which is not specifically limited in the embodiment of the present application. .
- the structure of the communication device 500 shown in FIG. 5 does not constitute a limitation on the communication device.
- the actual communication device may include more or less components than those shown in the figure, or combine certain components, or Different component arrangements.
- FIG. 6 is a schematic flowchart of a communication method provided by an embodiment of this application.
- the communication method can be applied to the communication between the terminal device and the secondary node shown in any one of FIG. 1 to FIG. 4, and the communication between the secondary node and the primary node.
- the communication method includes the following steps:
- the MCG is managed by the primary node
- the SCG is managed by the secondary node.
- the primary node is used to manage the MCG of the terminal device
- the secondary node is used to manage the SCG of the terminal device.
- the terminal device suspends the SCG.
- the operation of the terminal device to suspend the SCG can use any trigger mode, which is not limited in this application.
- the primary node or the secondary node notifies the terminal device to suspend the SCG; or the terminal device requests the primary node or the secondary node to suspend the SCG, and then the primary node or the secondary node sends confirmation information to suspend the SCG to the terminal device.
- the network side (such as the master node) configures the fast MCG link recovery function for the terminal device
- the terminal equipment resumes the suspended secondary cell group SCG.
- the fast MCG link recovery function means that in MR-DC, when the terminal device detects that the MCG has a link problem, the terminal device sends indication information to the master node through the SCG.
- the indication information is used to indicate the MCG link problem or Indicates that MCG has a link problem.
- the above S601 may be understood as only including the internal operation of the terminal device (that is, the following step 1).
- Step 1 When it is detected that the MCG of the primary cell group has a link problem, or the signal quality of the MCG is lower than the first signal quality threshold, the terminal device determines the cell to be restored in the suspended secondary cell group SCG.
- the terminal device suspends/suspension SCG can be understood as the terminal device 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 SCG Configured to quickly restore the communication link of the SCG.
- "suspending" may also be referred to as deactive/deactivation or hibernation.
- the deactive state (deactived state) may also be referred to as a suspended state, a dormant state, or an inactive state.
- suspending the SCG reference may be made to the existing implementation manner, and details are not described in the embodiment of the present application. It should be noted that when the SCG is suspended, the terminal device is still in the connected state (RRC_CONNECTED).
- suspending the SCG by the terminal device may also include: the terminal device suspends transmission with the SCG on the offload SRB1 and/or SRB3.
- offload SRB1 is used in offload bearer mode
- the signaling interaction between the terminal equipment and the primary cell group the signaling can be sent to the terminal equipment through the primary cell group and/or secondary cell group
- SRB3 is used in the terminal equipment Direct signaling interaction with the secondary cell group.
- the terminal device suspending the SCG may further include: the terminal device suspending data transmission with the SCG on a split bearer and/or SCG bearer.
- the terminal device described here implements DRX and/or DTX in some or all of the cells in the SCG
- the terminal device suspends the transmission with the SCG on the offload SRB1 and/or SRB3, which can be compared with this embodiment.
- the suspended SCG independent implementation or combined implementation is resumed. That is, when the network side notifies the terminal device to implement DRX and/or DTX in the SCG, the network side can also notify the terminal device to suspend transmission with the SCG on the offload SRB1 and/or SRB3.
- the terminal device only needs to send signaling in the recovered SCG, and does not need to send uplink signals after recovering from DRX and/or DTX, thereby reducing the power consumption of the terminal device.
- the terminal device detects that the MCG of the primary cell group has a link problem or the signal quality of the MCG is lower than the first signal quality threshold, the terminal device can determine that the suspended SCG needs to be restored, or it can be processed according to the existing technology, such as terminal equipment The RRC re-establishment process or other technical processing can be initiated, which is not specifically limited in the embodiment of the present application.
- the SCG includes cell A, cell B, cell C, and cell D, where DRX and/or DTX are implemented.
- cell A it can be suspended by deactivation
- cell B it can be suspended by dormancy
- cell C it can be suspended by entering an inactive state
- cell D it can be suspended. Suspending DRX transmission and/or DTX transmission is realized by suspending.
- any cell suspended by any of the above methods only the signaling transmission between the terminal equipment and the any cell may be suspended, or only the data between the terminal equipment and the any cell may be suspended
- signaling transmission and data transmission between the terminal device and any cell can also be suspended at the same time, which is not specifically limited in the embodiment of the present application.
- the above-mentioned signal quality may be characterized by one or more of the following parameters: reference signal received power (RSRP), reference signal received quality (RSRQ), signal-to-interference and noise ratio (signal) to interference plus noise ratio, SINR).
- the first signal quality threshold may include one or more of the following: a first RSRP threshold, a first RSRQ threshold, and a first SINR threshold.
- the above-mentioned MCG signal quality lower than the first signal quality threshold may include one or more of the following: the RSRP of the MCG detected by the terminal device is less than or equal to the first RSRP threshold, and the RSRQ of the MCG detected by the terminal device is less than or It is equal to the first RSRQ threshold, and the SINR of the MCG detected by the terminal device is less than or equal to the first SINR threshold.
- the first signal quality threshold may be sent by the master node to the terminal device, or may be obtained by the terminal device in other ways, and the present invention is not limited.
- the link problem of the MCG of the primary cell group may include one or more of the following: MCG has RLF, MCG or PCell has failed handover, or RRC reconfiguration has failed (for example, the terminal device cannot comply with the RRC sent by the MCG Part of the configuration in the reconfiguration message), the RRC layer of the terminal device receives the indication information of the integrity check failure of SRB1 or SRB2 from the bottom layer, such as the PDCP layer (this indication information may not include the integrity check failure of the RRC re-establishment message) Indication information of ), and other problems that cause abnormal MCG link communication, this embodiment of the present application does not specifically limit this.
- the occurrence of RLF in the MCG of the primary cell group may include one or more of the following: the terminal device detects that the downlink signal quality of the MCG is less than or equal to the second signal quality threshold, or the RRC layer of the terminal device receives random signals from the MCG MAC entity.
- Access problem indication where the MCG MAC entity may refer to the MAC entity corresponding to the MCG in the MAC layer of the terminal device, or the data packet of a certain SRB or DRB received from the MCG RLC entity reaches the maximum number of retransmissions, where The MCG RLC entity may refer to the RLC entity corresponding to the MCG in the RLC layer of the terminal device.
- the downlink signal quality of the MCG is less than or equal to the second signal quality threshold, which can be: the RRC layer of the terminal device receives N consecutive out-of-synchronization indications of the PCell from the physical layer, and then the terminal device can start a timer T310, If the RRC layer of the terminal device does not receive M consecutive synchronization indications of the PCell from the physical layer before the T310 timeout, the terminal device considers that RLF has occurred in the MCG, where N and M are integers greater than or equal to 1, and N and The value of M can be pre-configured to the terminal device by the network side.
- the second signal quality threshold can be: the RRC layer of the terminal device receives N consecutive out-of-synchronization indications of the PCell from the physical layer, and then the terminal device can start a timer T310, If the RRC layer of the terminal device does not receive M consecutive synchronization indications of the PCell from the physical layer before the T310 timeout, the terminal device considers that RLF has occurred in the MCG,
- the second signal quality threshold may further include one or more of the following: a second RSRP threshold, a second RSRQ threshold, and a second SINR threshold.
- the downlink signal quality of the MCG is less than or equal to the second signal quality threshold, which may include one or more of the following: the RSRP of the MCG detected by the terminal device is less than or equal to the second RSRP threshold, and the RSRQ of the MCG detected by the terminal device It is less than or equal to the second RSRQ threshold, and the SINR of the MCG detected by the terminal device is less than or equal to the second SINR threshold.
- the downlink signal quality of the MCG in the present invention may refer to the integrated downlink signal quality of the downlink signal quality of all cells in the MCG measured by the terminal equipment, or it may refer to the downlink signal quality of the PCell in the MCG measured by the terminal equipment quality.
- the foregoing signal quality, the first signal quality threshold, and the second signal quality threshold may also be implemented using other technical indicators, which are not specifically limited in the embodiment of the present application.
- the aforementioned signal quality is less than or equal to the first signal quality threshold, which usually occurs before the signal quality is less than or equal to the second signal quality threshold. That is, the first RSRP threshold is greater than the second RSRP threshold, the first RSRQ threshold is greater than the second RSRQ threshold, and the first SINR threshold is greater than the second SINR threshold.
- the terminal device can restore the SCG in advance before the MCG has a link problem, so that when the MCG has a link problem, it can notify the master node of the MCG link problem as soon as possible through the SCG that has been restored in advance, that is, the following S603 can be executed as soon as possible -S604 to restore the MCG, reduce the communication interruption time between the terminal equipment and the MCG, thereby improving the reliability of the communication between the terminal equipment and the MCG.
- the terminal device can resume the SCG in the following ways: activating some or all of the cells in the SCG that are deactivated, waking up some or all of the cells in the SCG that have entered the dormant state, and activating the SCG. Part or all of the cells in an inactive state, etc., will not be described in the embodiment of the present application.
- the terminal equipment resuming the SCG may also include: the terminal equipment resumes and the SCG has suspended the implementation of DRX and/or DTX in the cell in the SCG.
- the terminal device resuming the SCG may also include: the terminal device resuming data transmission on the offloaded radio bearer and/or SCG bearer with the cell in the SCG that has been suspended to implement DRX and/or DTX.
- SCG including cell A, cell B, cell C, and cell D as an example for description.
- cell A it can be restored by activation, for cell B, it can be restored by waking up, for cell C, it can be restored by entering the active state, and for cell D, it can be restored by resuming implementation of DRX and/or DTX.
- any cell suspended by any of the above methods only part or all of the signaling transmission between the terminal equipment and the any cell can be restored, or only the part between the terminal equipment and the any cell can be restored Or all data transmission, part or all of the signaling transmission and part or all of the data transmission between the terminal device and any cell can also be resumed at the same time, which is not specifically limited in the embodiment of the present application.
- the terminal device determining the cell to be recovered in the suspended secondary cell group SCG in the above step 1 may include: the terminal device determining that the recovery and the cell to be recovered in the SCG are in offload signaling radio bearer SRB1 And/or the transmission on the signaling radio bearer SRB3.
- offload SRB1 is used for signaling interaction between terminal equipment and primary cell group in offload bearer mode.
- the signaling can be sent to terminal equipment through the primary cell group and/or primary cell group, and SRB3 is used for terminal equipment to communicate with the primary cell group. Direct signaling interaction between primary and secondary cell groups.
- resuming the suspended secondary cell group SCG may further include: the terminal device resumes data transmission with the SCG on the offloaded radio bearer (ie split bearer) and/or the SCG radio bearer (ie SCG bearer).
- the terminal device may include a radio resource control RRC layer entity and a packet data convergence protocol PDCP layer entity.
- the communication method shown in FIG. 6 may further include: the radio resource control RRC layer entity of the terminal device sends the first indication information to the packet data convergence protocol PDCP layer entity of the terminal device.
- the first indication information is used to indicate the recovery of the SCG, such as the recovery method and recovery content of the SCG, where the recovery content may include: which cells in the SCG are recovered, and the signaling radio bearers and/or data that need to be recovered in each cell Radio bearer.
- the first indication information may be used to indicate the recovery of signaling transmission between the terminal equipment and the SCG in offloading SRB1 and/or SRB3. Further, the first indication information may be used to instruct to resume data transmission between the terminal device and the SCG on a split bearer (split bearer) or an SCG bearer (SCG bearer).
- split bearer split bearer
- SCG bearer SCG bearer
- the terminal device suspends the SCG, and when it is detected that the MCG of the primary cell group has a link problem, or the signal quality of the MCG is lower than the first signal quality threshold, step S601 the terminal device resumes the suspended SCG, which may include the above Step one, and/or, the terminal device requests the secondary node to resume the communication between the terminal device and the SCG, that is, the following step two. Step 2 is described in detail below.
- Step 2 The terminal equipment interacts with the secondary node to restore the transmission between the terminal equipment and the secondary node on the SCG.
- the above step two may include: the terminal device initiates a random access procedure to the secondary node.
- the terminal device sends a random access request preamble to the secondary node.
- the secondary node sends a random access response message to the terminal device.
- the random access request preamble is used for the terminal device to request access to the secondary node
- the random access response message is used to notify the terminal device whether the secondary node accepts the random access request initiated by the terminal device. If the secondary node accepts the random access request initiated by the terminal device, the random access response message can carry the acceptance indication information and the configuration information of the wireless resource allocated by the secondary node to the terminal device.
- the terminal device sends the next message (such as the terminal device).
- a MAC control element is sent, and the MAC control element carries the resource allocation information of the cell radio network temporary identifier (C-RNTI) allocated by the secondary node to the terminal device.
- C-RNTI cell radio network temporary identifier
- the random access response message may carry rejection indication information or the secondary node does not send a random access response.
- the secondary node After the secondary node receives the MAC control element carrying the C-RNTI allocated by the secondary node for the terminal device from the terminal device, the secondary node knows that the terminal device requests to restore the SCG, so that the suspended SCG can be restored.
- the terminal device will send a SCG recovery request message to the SCG.
- the request message for restoring the SCG may request restoring the transmission between the terminal device and the SCG in offloading SRB1 and/or SRB3.
- the first indication information may also be used to instruct to resume transmission between the terminal equipment and the SCG on the offload bearer or the SCG bearer.
- the terminal device in the SCG corresponding time alignment (time alignment, TA) timer (timer) expires (for example, exceeds the time threshold issued by the network side (such as the secondary node)
- the terminal device initiates a random response to the secondary node Access process.
- the terminal device interacts with the secondary node to resume the transmission of the terminal device and the secondary node on the SCG, which may include: the terminal device sends an uplink physical control channel to the secondary node. control channel, PUCCH).
- the secondary node When the secondary node receives the uplink physical control channel, the secondary node will send the resource allocation of the next information (such as the first message in S603 below or a request message to restore the SCG sent by the terminal device to the SCG) to the terminal device. information.
- the secondary node After the secondary node receives the PUCCH sent by the terminal device, the secondary node knows that the terminal device requests to restore the SCG, so that the suspended SCG can be restored.
- the terminal device does not expire in the timing calibration timer corresponding to the SCG, the terminal device sends the uplink physical control channel to the secondary node.
- the secondary node may resume the transmission between the terminal equipment and the SCG on the offload signaling radio bearer SRB1 and/or the signaling radio bearer SRB3, that is, resume signaling transmission. For example, resume the transmission between the terminal equipment and the primary and secondary cells in offloading SRB1 and/or SRB3.
- the terminal device can actively resume signaling transmission with the primary and secondary cells to restore the communication between the terminal device and the network side, thereby improving communication reliability.
- the secondary node can also resume the transmission between the terminal equipment and the primary and secondary cells on the DRB, that is, resume data transmission.
- the terminal device can also actively resume data transmission with the primary and secondary cells, so as to provide data transmission services for the terminal device.
- the secondary node can also restore the transmission between the terminal equipment and one or more secondary cells in the SCG on the SRB and/or DRB, that is, restore the signaling transmission and/or data transmission of part or all of the secondary cells in the SCG, In order to provide higher rate data transmission services for terminal equipment.
- the terminal device when it is detected that the MCG of the primary cell group has a link problem, or the signal quality of the MCG is lower than the first signal quality threshold, and the terminal device does not detect that the SCG of the secondary cell group has a link problem (that is, the terminal device and the secondary node When the link between is normal), or the signal quality of the SCG is higher than the third signal quality threshold, the terminal device resumes the suspended secondary cell group SCG.
- the specific meaning of detecting the link problem of the secondary cell group SCG may be: the RRC layer of the terminal device receives N1 continuous out-of-synchronization indications of the PSCell from the physical layer, and then the terminal device can start a timer T310.
- the terminal device Before T310 times out, if the RRC layer of the terminal device does not receive M1 continuous synchronization indications of the PSCell from the physical layer, the terminal device considers that the SCG has RLF, where N1 and M1 are integers greater than or equal to 1, and N1 and M1 are The value can be pre-configured to the terminal device by the network side.
- the downlink signal quality of the SCG is higher than the third signal quality threshold, which may include one or more of the following: the RSRP of the SCG detected by the terminal device is greater than the third RSRP threshold, the RSRQ of the SCG detected by the terminal device is greater than the third RSRQ threshold,
- the SINR of the SCG detected by the terminal device is greater than the third SINR threshold.
- the SCG downlink signal quality in the present invention may refer to the combined downlink signal quality of the downlink signal quality of all cells in the SCG measured by the terminal equipment, or it may refer to the downlink signal quality of the PSCell in the SCG measured by the terminal equipment quality.
- the communication method shown in FIG. 6 may further include: after detecting that the MCG has a link problem, or the signal quality of the MCG is lower than the signal quality threshold, the terminal device sends a signal to the SCG
- the maximum transmission power is the first maximum transmission power.
- the first maximum transmission power is greater than the second maximum transmission power
- the second maximum transmission power is the maximum transmission power at which the terminal device sends a signal to the SCG before the SCG is suspended. That is to say, the terminal device can send a signal to the SCG with the largest possible transmission power, such as sending the aforementioned random access request message, so as to restore the SCG as soon as possible, thereby further improving communication reliability.
- the terminal device since the cells in the SCG are all cells on the secondary node, the terminal device sends a signal to the SCG, which can also be understood as the terminal device sends a signal to the secondary node through the SCG, or the terminal device sends a signal to the secondary node.
- the maximum transmission power supported by it is the total maximum transmission power of the terminal device.
- the sum of the actual transmission power of the terminal device sending a signal to the MCG (hereinafter referred to as the first transmission power) and the actual transmission power of the terminal device sending a signal to the SCG (hereinafter referred to as the second transmission power) shall not be exceeded at any time.
- the first transmission power or the second transmission power may be less than or equal to the total maximum transmission power.
- the terminal device sends a signal to the MCG and the terminal device sends a signal to the SCG transmission time period overlapped part (hereinafter referred to as overlap), that is, the terminal device sends signals to MCG and SCG at the same time, then the first transmission power
- the sum of the second transmit power and the second transmit power should also be less than or equal to the total maximum transmit power.
- first transmission power and second transmission power can also be determined in combination with one or more of the following: the maximum transmission power of the terminal device configured on the network side on the MCG, and the terminal device The maximum transmit power on the SCG, and the predefined maximum transmit power of the terminal device on the MCG, and the maximum transmit power of the terminal device on the SCG.
- the maximum transmission power of the terminal device configured on the network side on the MCG and the terminal device The maximum transmit power on the SCG, and the predefined maximum transmit power of the terminal device on the MCG, and the maximum transmit power of the terminal device on the SCG.
- Method 1 When the SCG is not suspended, the semi-static power sharing scheme between MCG and SCG is: when the terminal device is in a CG, such as CG1, there is uplink transmission, the terminal device checks another CG, such as CG2
- the semi-static transmission direction configuration configured in, for example, a symbol is used for uplink transmission or downlink transmission or can be flexibly configured.
- flexible configuration means that it may be uplink or downlink, which can be determined by the terminal device itself. Specifically, the network side will notify the terminal device in advance whether the semi-static transmission direction corresponding to a certain symbol is uplink transmission, downlink transmission, or flexible configuration.
- the semi-static transmission direction configured on some carriers in CG2 is also uplink transmission, or flexible configuration. Then the actual transmit power restricted by the terminal device in CG1 does not exceed the maximum transmit power configured on the network side (the network side can be configured to the terminal device in advance through the RRC message. Otherwise (that is, no overlap), the terminal device’s uplink transmission in CG1
- the maximum transmission power is a predefined value.
- Method 2 (Option 2): When the SCG is not suspended, the semi-static power sharing scheme between MCG and SCG is: the maximum transmit power of the terminal device in each CG cannot exceed the corresponding value configured for the terminal device on the network side. Maximum transmit power in CG. At this time, the terminal device does not need to determine whether the uplink transmissions in the two CGs overlap, and the maximum transmission power in each CG only needs to consider the maximum transmission power that does not exceed the network configuration.
- Method 3 When the SCG is not suspended, the dynamic power sharing scheme between MCG and SCG is: when a certain CG, such as CG1, has uplink signal transmission, if the uplink transmission on CG1 and another CG, such as CG2 If the uplink transmission of the terminal device overlaps, the maximum transmission power of the uplink transmission of the terminal device on the CG1 does not exceed the maximum transmission power on the CG1 configured by the network side for the terminal device. Otherwise (non-overlapping), the maximum transmission power of the terminal equipment in the uplink transmission of CG1 does not exceed the value predefined by the protocol, such as the maximum transmission power defined by the RAN4 protocol.
- the terminal device can determine whether there is overlap between the uplink transmissions on the two CGs through the following scheme: When the starting point of the uplink transmission on the SCG is T0, the terminal device will consider whether there is physical downlink control before T0-T_offset
- T_offset is the time advance of the MCG uplink transmission corresponding to the SCG uplink transmission.
- the maximum transmission power of the terminal device on the SCG is: min ⁇ the maximum transmission power of the SCG configured on the network side, the total maximum transmission power of the terminal device-the actual transmission power of the MCG ⁇ , where the operator min ⁇ x, y ⁇ means to find the minimum value of x and y. Otherwise (without overlap), the maximum transmit power of the terminal device on the SCG is the total maximum transmit power of the terminal device.
- the maximum transmission power of the terminal device on the MCG can be different from the maximum transmission power of the terminal device on the MCG when the SCG of the terminal device is normal.
- the device can use the maximum transmit power to send a signal to the MCG. For example, if the power sharing mode configured by the network side for the terminal device is the above method 1, the maximum transmission power of the signal sent by the terminal device to the MCG may not exceed the maximum transmission power predefined by the protocol, such as the maximum transmission power defined by the RAN4 protocol.
- the maximum transmission power of the signal transmitted by the terminal device to the MCG may not exceed the maximum transmission power configured on the network side.
- the power sharing mode configured by the network side for the terminal device is the above method 3
- the maximum transmission power of the signal transmitted by the terminal device to the MCG may not exceed the maximum transmission power configured on the network side.
- no matter which sharing mode is adopted the maximum transmission power of the terminal device to the MCG may not exceed the total maximum transmission power of the terminal device.
- the terminal device when the terminal device detects that the MCG has a link problem, and/or the signal quality of the MCG is less than or equal to the signal quality threshold, the terminal device can suspend sending signals to the MCG, but can use All available transmission power, such as the above-mentioned total maximum transmission power is used to send signals to the SCG (that is, it is only necessary to ensure that the maximum transmission power of the terminal equipment to the SCG does not exceed the total maximum transmission power).
- the terminal device may not consider whether the transmission time period of the terminal device to the MCG and the transmission time period of the terminal device to the SCG overlap, that is, the terminal device may not be affected by the network configuration between MCG and SCG.
- the power limit is to interact with the auxiliary node with the largest possible transmit power to restore the suspended SCG as soon as possible, so as to restore the communication between the terminal device and the network side to improve communication reliability.
- the communication method shown in FIG. 6 may further include: the terminal device sends a signal to the SCG within the first time period, such as a random access request message sent by the terminal device, and the following first One news and so on.
- the secondary node receives the signal from the terminal device in the first time period.
- the first time period includes the time period during which the terminal device sends a signal to the MCG and the time period during which the terminal device sends a signal to the SCG according to a time division multiplexing pattern (TDM pattern) between the MCG and the SCG.
- TDM pattern time division multiplexing pattern
- the foregoing terminal device sending a signal to the SCG within the first time period may include: the terminal device sending a signal to the SCG starting from the first moment.
- the first moment is the earliest transmission moment among multiple transmission moments (also referred to as transmission occasions) in the first time period.
- the terminal device can send a signal to the SCG at the earliest sending moment, so as to recover the SCG as soon as possible, thereby further improving communication reliability.
- the terminal device may send a signal to the SCG at multiple sending moments in the first time period at the first maximum transmission power. Further, the multiple sending moments in the first time period may include the foregoing first moment.
- the above describes in detail how the terminal device requests the secondary node to restore the SCG.
- the following describes in detail the specific operations of the secondary node in the process of restoring the SCG in conjunction with an example of a physical architecture of the access network device.
- FIG. 7 is a schematic structural diagram of an access network device provided by an embodiment of the application.
- the access network device may be the above-mentioned primary node or secondary node.
- the access network equipment includes CU and DU.
- CU can be further divided into CU-CP and CU-UP, and the communication between CU-CP and DU is through the F1-C interface.
- Communication between CU-CP and CU-UP is through the F1-U interface, and communication between CU-CP and CU-UP is through the E1 interface.
- the DU of the secondary node when the DU of the secondary node receives uplink information from the terminal equipment (for example, the random access procedure or PUCCH-related information described above), the DU of the secondary node can restore the terminal equipment’s status on the SCG. transmission.
- the DU of the secondary node may notify or request the CU-CP to resume the SCG transmission of the terminal device in the secondary node.
- the CU-CP of the secondary node may further notify the CU-UP to resume the SCG transmission of the terminal device in the secondary node.
- the CU after the CU of the secondary node receives the first message in S603 described below sent by the terminal device, the CU then informs the DU to resume the data and/or signaling transmission of the terminal device on the SCG .
- the DU of the secondary node receives
- the DU of the secondary node will first send an initial UL RRC message transfer message to the CU, and then the CU of the secondary node will interact with the DU of the secondary node to establish the terminal device’s
- the CU of the secondary node may send a UE context setup request (UE context setup request) message to the DU of the secondary node, and then receive a UE context setup response (UE context setup response) message from the DU of the secondary node.
- UE context setup request UE context setup request
- UE context setup response UE context setup response
- the terminal device may also send the MCG link problem or MCG link problem to the master node through the secondary node. Therefore, optionally, the communication method may further include S602-S604:
- S602 The terminal device sends the first message to the master node through the secondary node.
- the master node receives the first message from the terminal device through the slave node.
- the first message includes second indication information
- the second indication information is used to indicate that the MCG has a link problem or that the MCG has a link problem.
- the specific implementation of the link problem occurring in the MCG can refer to the above step 1, which will not be repeated here.
- the master node can restore the MCG accordingly, such as instructing the terminal device to perform a handover process or a reconfiguration process, thereby further improving communication reliability.
- the master node Before the master node receives the first message, the master node considers that the SCG of the terminal device is suspended. After the master node receives the first message, the master node learns that the terminal device has resumed the suspended secondary cell group SCG.
- the terminal device sending the first message to the master node through the secondary node may include: after the secondary node accepts the random access request initiated by the terminal device, such as when the terminal device receives the random access request from the secondary node After carrying the random access response indicating the acceptance, the terminal device sends the first message to the master node through the secondary node.
- the secondary node may perform the following steps: after the secondary node sends a random access response carrying an acceptance instruction to the terminal device, the secondary node receives the first message from the terminal device and passes the interface between the primary node and the secondary node, such as The Xn interface or the X2 interface sends the first message to the master node.
- the master node receiving the first message from the terminal device through the secondary node may include: the secondary node receives the first message from the terminal device through the air interface; further, the master node may communicate between the primary node and the secondary node.
- An interface such as an Xn interface or an X2 interface, receives the first message from the secondary node.
- the master node receives the first message through the RRC transfer (RRC Transfer) message in the Xn interface or the X2 interface, that is, the RRC transfer message carries the first message.
- RRC transfer RRC Transfer
- the foregoing first message may be an MCG failure information (MCGFailureInformation) message. Examples are as follows.
- the terminal device sends the MCG failure information message to the master node through the secondary node.
- the secondary node sends an RRC transmission message to the master node, where the RRC transmission message carries the MCG failure information message.
- the secondary node directly sends the received MCG failure information message to the master node, without taking out the MCG failure information message from other RRC messages.
- the master node acquires the content of the MCG failure information message.
- the terminal device can encapsulate the MCG failure information message in other messages, or include the MCG failure information message in a container in other messages, and send it to the secondary node.
- the terminal device encapsulates the MCG failure information message in a multi-radio dual connection uplink information transmission (ULInformationTransfer MRDC) message and sends it to the secondary node.
- the secondary node may extract the message after receiving the MCG failure information message.
- the encapsulated MCG failure information message is then sent to the master node through the RRC transmission message, that is, the MCG failure information message is carried in the RRC transmission message.
- the MCG failure information message can be encapsulated in the RRC transmission message or contained in a container of the RRC transmission message.
- the communication method shown in FIG. 6 may further include: the terminal device passes through the SCG in the first time period.
- the slave node sends a signal to the master node.
- the master node receives the signal from the terminal device through the slave node in the first time period. That is to say, the terminal device does not need to consider the limitation of time division multiplexing between MCG and SCG, that is, the terminal device can use all the time periods originally used to send signals to MCG and SCG to send signals to the master node through the secondary node. , In order to restore MCG as soon as possible, thereby further improving communication reliability.
- the transmission power of the signal (carrying the second indication information) sent by the terminal device to the SCG may also be determined according to the first maximum transmission power in the foregoing step 2.
- the specific implementation of the first maximum transmit power refer to the above step 2, which will not be repeated here.
- S603 The master node sends a response message of the first message to the terminal device through the slave node.
- the terminal device receives the response message of the first message from the master node through the secondary node.
- the response message of the first message may be an RRC reconfiguration (RRC reconfiguration) message or an RRC release (RRC release) message that carries synchronization information, or other messages.
- RRC release message is used to instruct the terminal device to release the RRC connection that has a link problem to notify the terminal device that the network side cannot restore the MCG.
- the aforementioned synchronization information is used to instruct the terminal device to restore the MCG, such as instructing the terminal device to perform a handover procedure or a reconfiguration procedure to restore the MCG, that is, the RRC reconfiguration message can be used to instruct the terminal device to restore the MCG, thereby further improving communication reliability.
- the RRC reconfiguration message can also be used to instruct the terminal device to suspend the SCG again, so as to save the power consumption of the terminal device.
- the master node sends a response message of the first message to the terminal device through the slave node, which may include: the master node may send the first message to the slave node through an interface between the master node and the slave node, such as an Xn interface or an X2 interface Response message.
- the master node sends the response message of the first message to the secondary node through the RRC transmission message transmitted by the Xn interface or the X2 interface, that is, the RRC transmission message carries the response message of the first message.
- the secondary node transparently transmits the response message of the first message directly to the terminal device through the air interface or is included in other messages sent to the terminal device. The following is an example.
- the response message of the first message may be an RRC reconfiguration message or an RRC release message that carries synchronization information.
- the master node can send an RRC transmission message to the secondary node through the interface between the primary node and the secondary node, such as the Xn interface or the X2 interface.
- the RRC transmission message carries the RRC reconfiguration carrying synchronization information. Message or RRC release message.
- the secondary node receives the RRC reconfiguration message or RRC release message carrying the synchronization information from the primary node through the interface between the secondary node and the primary node, such as the Xn interface or the X2 interface, for example, the primary node uses the Xn interface or X2 interface.
- the RRC transmission message in the interface sends the response message of the first message, that is, the RRC transmission message carries the response message of the first message.
- the secondary node sends a response message to the first message received from the primary node to the terminal device.
- the response message of the first message may also be another message encapsulated with an RRC reconfiguration message or an RRC release message carrying synchronization information and sent to the terminal device, such as multi-wireless dual-connection downlink information transmission.
- DLInformationTransferMRDC DLInformationTransferMRDC
- the master node sends the RRC reconfiguration message or RRC release message carrying synchronization information to the slave node through the interface between the master node and the slave node, such as the Xn interface or the X2 interface.
- the RRC transmission message in the interface or the X2 interface sends the response message of the first message, that is, the RRC transmission message carries the response message of the first message.
- the secondary node receives messages from the primary node through the interface between the secondary node and the primary node, such as an Xn interface or an X2 interface.
- the secondary node may encapsulate the response message of the first message in another message, such as a multi-wireless dual-connection downlink information transmission message, and send it to the terminal device.
- S604 The terminal device interacts with the first node to restore the MCG.
- the terminal device may interact with the first node according to the response message of the first message, so as to restore the MCG.
- the terminal device may access the first cell in the first node according to the response message of the first message, and send an RRC reconfiguration complete message (RRC Reconfiguration Complete) to the first cell in the first node after the access is successful.
- RRC Reconfiguration Complete RRC reconfiguration complete
- the first node may be the MN, and the first cell may be the original primary cell, that is, the terminal device restores the MCG by executing the RRC reconfiguration process.
- the first cell may also be another cell in the MN, such as a secondary cell in the MCG or another cell located in the MN but not belonging to the MCG, that is, the terminal device restores the MCG by executing the intra-site handover procedure.
- the first node may also be another node other than MN, such as SN or another node other than MN and SN, and the first cell may be one of the first nodes.
- the cell that is, the terminal equipment restores the MCG by performing the inter-station handover procedure at this time.
- the transmission between the terminal equipment and the MCG on the offload SRB1 and/or SRB3 can be resumed, that is, the signaling transmission can be resumed.
- the transmission on the DRB between the terminal device and one or more cells in the MCG can also be resumed, that is, data transmission can be resumed.
- scheduling timing restriction and/or transmission power restriction between MCG and SCG can also be restored.
- the terminal device can suspend the SCG again to save the power consumption of the terminal device.
- the terminal device can record random access information.
- the random access information refers to the information of the random access process initiated by the terminal device when the terminal device executes the SCG recovery process.
- the random access process may include multiple access attempts.
- the random access information may include one or more of the following information for each access attempt: conflict indication information (that is, whether to communicate with another terminal device to the SCG Random access process conflict initiated), the identifier of the random access prefix (random access preamble) sent, the configuration information of the synchronization signal block (synchronization signal block, SSB) used to send the random access prefix, the random access The number of times the prefix is sent, access indication information, etc.
- the conflict indication is used to indicate whether the random access process initiated by the terminal device to the SCG conflicts with the random access process initiated by another terminal device to the SCG, and the access indication information is used to indicate that the random access information is recovering the SCG.
- the process is recorded when the random access process is performed.
- the terminal device can instruct the SCG to automatically fall back to the suspended state.
- the RRC layer entity of the terminal device can send a message to the PDCP layer entity of the terminal device.
- Indication information the first indication information is used to indicate that the SCG is suspended.
- the terminal device may not send data, that is, the recovery of the SCG is only to prepare for the recovery of the MCG. For example, when the terminal device detects that the signal quality of the MCG is lower than the first signal quality threshold in S601, the terminal device determines the cell to be restored in the suspended SCG.
- the terminal device can suspend the SCG again to save the power consumption of the terminal device.
- the value of the designated time period may be determined according to actual communication requirements, and the embodiment of the present application does not make any limitation on the value of the designated time period and the specific implementation manner.
- the terminal device when the terminal device detects that the MCG has a link problem or the signal quality of the MCG has deteriorated, that is, when the terminal device learns that the communication quality with the master node on the MCG has deteriorated, The terminal device can resume the suspended SCG to resume the communication between the terminal device and the secondary node on the SCG, thereby improving the communication reliability of the terminal device.
- FIG. 8 is a second structural diagram of a communication device provided in an embodiment of the present application.
- the communication device may be the terminal device or the secondary node or the master node shown in FIG. 1 or the communication device 500 shown in FIG. 5, or it may be the terminal device or the auxiliary node shown in FIG.
- the embodiments of the present application do not specifically limit this.
- the communication device 800 includes: a processing module 801 and a transceiver module 802.
- FIG. 8 only shows the main components of the communication device 800.
- the communication device 800 can be applied to the communication system shown in FIG. 1 to perform the functions of the terminal device in the communication method shown in FIG. 6. This will be explained in detail below.
- the processing module 801 is configured to restore the suspended secondary cell group SCG when the control transceiver module 802 detects that the primary cell group MCG has a link problem, or the signal quality of the MCG is lower than the signal quality threshold.
- the MCG is managed by the primary node
- the SCG is managed by the secondary node.
- the processing module 801 is also used to resume transmission with the SCG on the offload signaling radio bearer SRB1 and/or the signaling radio bearer SRB3.
- the processing module 801 may include a radio resource control RRC layer entity and a packet data convergence protocol PDCP layer entity.
- the RRC layer entity is used to send the first indication information to the PDCP layer entity.
- the first indication information is used to indicate to restore the SCG.
- the transceiver module 802 is further configured to send second indication information to the master node through the secondary node.
- the second indication information is used to indicate that the MCG has a link problem or that the MCG has a link problem.
- the transceiver module 802 is further configured to send the second indication information to the primary node through the secondary node after the secondary node accepts the random access request initiated by the communication device 800.
- the second indication information may be included in the first message for transmission.
- the first message may be an MCG failure message, or another message including the MCG failure message.
- the transceiver module 802 is further configured to receive a response message of the first message from the master node through the secondary node.
- the response message of the first message may be an RRC reconfiguration message or an RRC release message.
- the RRC reconfiguration message may be used to instruct the terminal device to suspend the SCG.
- the processing module 801 is also used to determine that the maximum transmission power of the signal sent by the communication device 800 to the SCG is The first maximum transmit power. Wherein, the first maximum transmission power is greater than the second maximum transmission power, and the second maximum transmission power is the maximum transmission power at which the communication device 800 transmits a signal to the SCG before the SCG is suspended.
- the transceiver module 802 is also used to send a signal to the SCG in the first time period.
- the first time period includes a time period during which the communication device 800 sends a signal to the MCG and a time period during which the communication device 800 sends a signal to the SCG according to the time division multiplexing pattern between the MCG and the SCG.
- the transceiver module 802 is also configured to send a signal to the SCG from the first moment.
- the first moment is the earliest sending moment among the multiple sending moments in the first time period.
- the transceiver module 802 may send a signal to the SCG at multiple sending moments in the first time period at the first maximum transmission power.
- the multiple sending moments in the first time period may include the foregoing first moment.
- the communication device 800 can also be applied to the communication system shown in FIG. 1 to perform the function of the auxiliary node in the communication method shown in FIG. 6.
- the secondary node is used to manage the SCG.
- the processing module 801 is used to control the transceiver module 802 to interact with the terminal device to restore the secondary cell group SCG in which the terminal device has been suspended.
- the processing module 801 is also used to restore the transmission between the terminal equipment and the SCG on the offload signaling radio bearer SRB1 and/or the signaling radio bearer SRB3.
- the transceiver module 802 is also used to accept a random access request initiated by a terminal device. Among them, the random access request is used to recover the SCG.
- the transceiver module 802 is further configured to receive second indication information from the terminal device and send the second indication information to the master node.
- the master node is used to manage the primary cell group MCG of the terminal equipment, and the second indication information is used to indicate a link problem occurred in the MCG or indicate that a link problem occurred in the MCG.
- the second indication information may be included and sent in the first message.
- the first message may be an MCG failure message, or another message including the MCG failure message.
- the transceiver module 802 is also configured to receive the response message of the first message from the master node, and send the response message of the first message to the terminal device.
- the response message of the first message may be an RRC reconfiguration message or an RRC release message.
- the RRC reconfiguration message is used to instruct the terminal device to resume the MCG
- the RRC release message is used to instruct the terminal device to RRC connection.
- the RRC reconfiguration message may also be used to instruct the terminal device to suspend the SCG.
- the transceiver module 802 is also used to receive signals from the terminal device in the first time period.
- the first time period includes the time period during which the terminal device sends a signal to the MCG and the time period during which the terminal device sends a signal to the SCG according to the time division multiplexing pattern between the MCG and the SCG.
- the transceiver module 802 is also configured to receive signals from the terminal device from the first moment.
- the first moment is the earliest sending moment among the multiple sending moments in the first time period.
- the communication device 800 can also be applied to the communication system shown in FIG. 1 to perform the function of the master node in the communication method shown in FIG. 6.
- the master node is used to manage the MCG.
- the transceiver module 802 is configured to receive the second indication information from the terminal device through the secondary node.
- the secondary node is used to manage the secondary cell group SCG, and the second indication information is used to indicate a link problem occurred in the MCG or indicate that a link problem occurred in the MCG.
- the processing module 801 is used to restore the MCG.
- the second indication information may be included in the first message for transmission.
- the first message may be an MCG failure message, or another message including the MCG failure message, which is not specifically limited in the embodiment of the present application.
- the transceiver module 802 is further configured to send a response message of the first message to the terminal device through the secondary node.
- the response message of the first message is an RRC reconfiguration message or an RRC release message.
- the RRC reconfiguration message is used to instruct the terminal device to resume the MCG
- the RRC release message is used to instruct the terminal device to release the RRC connection.
- the RRC reconfiguration message may also be used to instruct the terminal device to suspend the SCG.
- the transceiver module 802 is further configured to receive a signal from the terminal device through the auxiliary node in the first time period.
- the first time period includes the time period during which the terminal device sends a signal to the MCG and the time period during which the terminal device sends a signal to the SCG according to the time division multiplexing pattern between the MCG and the SCG.
- the communication device 800 shown in FIG. 8 may further include a storage module (not shown in FIG. 8), and the storage module stores programs or instructions.
- the processing module 801 executes the program or instruction
- the communication device 800 can perform the functions of the terminal device or the secondary node or the master node in the communication method shown in FIG. 6.
- the embodiment of the present application provides a communication device.
- the communication device is used to execute the communication method described in the foregoing method embodiment.
- the embodiment of the present application provides a communication device.
- the communication device includes a processor.
- the processor is configured to execute the communication method described in the foregoing method embodiment.
- the embodiment of the present application provides a chip system.
- the chip system includes a processor and an input/output port.
- the processor is used to implement the processing functions involved in the foregoing method embodiment, and the input/output port is used to implement the transceiver function involved in the foregoing method embodiment.
- the chip system may further include a memory, which is used to store program instructions and data for implementing various functions involved in the foregoing method embodiments.
- the chip system can be composed of chips, or include chips and other discrete devices.
- the embodiment of the present application provides a communication system.
- the system includes the above-mentioned terminal device, auxiliary node, and master node.
- auxiliary node For details, reference may be made to the communication system embodiment shown in FIG. 1, which will not be repeated here.
- the embodiment of the present application provides a computer-readable storage medium, which includes a computer program or instruction; when the computer program or instruction runs on a computer, the computer is caused to execute the communication method described in the foregoing method embodiment .
- the embodiment of the present application provides a computer program product, including a computer program or instruction, when the computer program or instruction runs on a computer, the computer is caused to execute the communication method described in the foregoing method embodiment.
- the processor in the embodiments of the present application may be a central processing unit (central processing unit, CPU), and the processor may also be other general-purpose processors, digital signal processors (digital signal processors, DSP), and dedicated integration Circuit (application specific integrated circuit, ASIC), ready-made programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc.
- the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
- the memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
- the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electrically available Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
- the volatile memory may be random access memory (RAM), which is used as an external cache.
- RAM random access memory
- static random access memory static random access memory
- DRAM dynamic random access memory
- DRAM synchronous dynamic random access memory
- Access memory synchronous DRAM, SDRAM
- double data rate synchronous dynamic random access memory double data rate SDRAM, DDR SDRAM
- enhanced synchronous dynamic random access memory enhanced SDRAM, ESDRAM
- synchronous connection dynamic random access memory Take memory (synchlink DRAM, SLDRAM) and direct memory bus random access memory (direct rambus RAM, DR RAM).
- the foregoing embodiments may be implemented in whole or in part by software, hardware (such as circuits), firmware, or any other combination.
- the above-mentioned embodiments may be implemented in the form of a computer program product in whole or in part.
- the computer program product includes one or more computer instructions or computer programs.
- the processes or functions described in the embodiments of the present application are generated in whole or in part.
- the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
- the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium.
- the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website, computer, server or data center via wired (such as infrared, wireless, microwave, etc.).
- the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that includes one or more sets of available media.
- the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium.
- the semiconductor medium may be a solid state drive.
- At least one refers to one or more, and “multiple” refers to two or more.
- the following at least one item (a)” or similar expressions refers to any combination of these items, including any combination of a single item (a) or a plurality of items (a).
- at least one item (a) of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple .
- the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not correspond to the embodiments of the present application.
- the implementation process constitutes any limitation.
- the disclosed system, device, and method can be implemented in other ways.
- the device embodiments described above are only illustrative.
- the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented.
- the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
- the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
- the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
- the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
- the technical solution of the present application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
- the aforementioned storage media include: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disks or optical disks and other media that can store program codes. .
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Abstract
本申请提供一种通信方法及装置,能够解决当SCG被挂起,且MCG发生了链路问题或信号质量变差时,终端设备可能无法与网络侧正常通信的问题,从而提高通信可靠性,适用于任一双连接架构的通信***中,如EN-DC、NGEN-DC、NE-DC、NR-DC等。该方法包括:当检测到MCG发生链路问题,或MCG的信号质量低于信号质量阈值时,终端设备恢复挂起的SCG,以恢复终端设备与网络侧的通信。其中,MCG由主节点管理,SCG由辅节点管理。进一步地,终端设备可以在SCG恢复后,通过辅节点向主节点发送第二指示信息。其中,第二指示信息用于指示MCG发生的链路问题或指示MCG发生了链路问题,以便主节点恢复MCG,从而进一步提高通信可靠性。
Description
本申请要求于2020年02月21日提交国家知识产权局、申请号为202010108253.6、申请名称为“通信方法及装置”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
本申请涉及通信领域,尤其涉及一种通信方法及装置。
在双连接(dual-connectivity,DC,例如多无线双连接(multi-radio dual connectivity,MR-DC))场景下,终端设备可以与多个接入网设备通信,如终端设备可以同时与主节点(master node,MN)上的主小区组(master cell group,MCG)和辅节点(secondary node,SN)上的辅小区组(secondary cell group,SCG)通信。进一步地,可以在SCG中传输的数据比较少或无数据传输,或要求的数据速率较低时暂停或挂起(store或suspend)SCG,以降低终端设备功耗。
然而,当终端设备的SCG被挂起时,若终端设备检测到MCG发生了无线链路问题,则终端设备会发起RRC重建立(RRC re-establishment)流程以恢复MCG,从而导致终端设备与无线网络之间的通信中断。
发明内容
本申请实施例提供一种通信方法及装置,能够解决当SCG被挂起,且MCG发生了链路问题或信号质量变差时,终端设备可能无法与网络侧正常通信的问题,从而提高通信可靠性。
为达到上述目的,本申请采用如下技术方案:
第一方面,提供一种通信方法。该方法包括:当检测到主小区组MCG发生链路问题,或MCG的信号质量低于信号质量阈值时,终端设备恢复挂起的辅小区组SCG。其中,MCG由主节点管理,SCG由辅节点管理。
基于第一方面提供的通信方法,当终端设备检测到MCG发生链路问题,或MCG的信号质量变差时,也就是当终端设备获知与主节点在MCG上的通信质量变差时,终端设备可以恢复挂起的SCG,也就是恢复终端设备与辅节点在SCG上的通信,从而提高终端设备与无线网络之间的通信可靠性。
示例性地,与上述终端设备挂起SCG的具体实现方式相对应,上述终端设备恢复挂起的辅小区组SCG,可以采用如下一种方式实现:激活(activate)SCG中已被去激活的(deactivated)部分或全部小区、唤醒(wakeup)SCG中处于休眠状态(domancy)的部分或全部小区、停止在SCG中的部分或全部小区实施的不连续接收(discontinuous reception,DRX)和/或不连续发送(discontinuous transmission,DTX)或者只恢复在SCG中的信令传输。也就是说,终端设备可以只恢复终端设备与SCG中被挂起一个小区,如主辅小区之间的传输,也可以恢复终端设备与SCG中被挂起多个小区,如主辅 小区和至少一个辅小区之间的传输。其中,对于被恢复的任一小区而言,恢复终端设备与该小区之间的传输,可以包括:只恢复终端设备与该小区在信令无线承载上的传输,即只恢复信令传输,或者恢复终端设备与该小区在信令无线承载上的传输,以及终端设备与该小区在数据无线承载上的传输,即同时恢复信令传输和数据传输。本申请实施例对于终端设备挂起和恢复SCG的实现方式,不做具体限定。
在一种可能的设计方案中,上述终端设备恢复挂起的辅小区组SCG,可以包括:终端设备恢复与SCG在分流信令无线承载SRB1和/或信令无线承载SRB3上的传输。如此,终端设备可以主动恢复与辅节点之间的信令传输,从而提高通信可靠性。进一步地,终端设备还可以恢复与辅节点之间的数据传输,如终端设备与SCG之间的数据无线承载DRB。
需要说明的是,上述终端设备恢复挂起的SCG的决定可以由终端设备做出,即终端设备为恢复挂起的SCG的发起方。示例性地,终端设备可以包括无线资源控制(radio resource control,RRC)层实体和分组数据汇聚协议(packet data convergence protocol,PDCP)层实体。可选地,第一方面所述的通信方法还可以包括:终端设备的无线资源控制RRC层实体向终端设备的分组数据汇聚协议PDCP层实体发送第一指示信息。其中,第一指示信息用于指示恢复SCG。
进一步地,第一方面所述的通信方法还可以包括:终端设备通过辅节点向主节点发送第二指示信息。其中,第二指示信息用于指示MCG发生的链路问题或指示MCG发生了链路问题。如此,主节点可以据此恢复MCG,如指示终端设备执行切换流程或重配置流程,从而进一步提高通信可靠性。
可选地,第一方面所述的通信方法还可以包括:在辅节点接受终端设备发起的随机接入请求之后,终端设备通过辅节点向主节点发送第二指示信息。
示例性地,第二指示信息可以包括在第一消息中传输。其中,第一消息可以为MCG失败消息,或包括MCG失败消息的另一消息,本申请实施例对此不做具体限定。
可选地,第一方面所述的通信方法还可以包括:终端设备通过辅节点从主节点接收第一消息的响应消息。其中,第一消息的响应消息可以为RRC重配置消息,即第一消息的响应消息可以用于恢复MCG,以进一步提高通信可靠性。可选地,RRC重配置消息还可以用于指示终端设备挂起SCG,以节省终端设备的功耗。
或者,可选地,第一消息的响应消息也可以为RRC释放消息,即第一消息的响应消息也可以用于释放RRC连接,以通知终端设备,网络侧无法恢复MCG。通过释放RRC连接,节约了终端设备的功耗。
在一种可能的设计方案中,第一方面所述的通信方法还可以包括:在检测到MCG发生链路问题,或MCG的信号质量低于信号质量阈值之后,终端设备向SCG发送信号的最大发射功率为第一最大发射功率。其中,第一最大发射功率大于第二最大发射功率,第二最大发射功率为SCG被挂起前终端设备向SCG发送信号的最大发射功率。也就是说,终端设备可以尽可能大的发射功率向SCG发送信号,如随机接入请求和上述第一消息,以尽快恢复SCG,从而进一步提高通信可靠性。
在另一种可能的设计方案中,第一方面所述的通信方法还可以包括:终端设备在第一时间段内向SCG发送信号。其中,第一时间段包括根据MCG与SCG之间的时分 复用图样,终端设备向MCG发送信号的时间段和终端设备向SCG发送信号的时间段。也就是说,终端设备可以不必考虑MCG与SCG之间的时分复用的限制,即终端设备可以在原本用于向MCG和SCG发送信号的所有时间段内向SCG发送信号,以便尽快恢复SCG,从而进一步提高通信可靠性。
可选地,上述终端设备在第一时间段内向SCG发送信号,可以包括:终端设备从第一时刻开始,向SCG发送信号。其中,第一时刻为第一时间段内的多个发送时刻中最早的发送时刻。如此,终端设备可以在最早发送时刻向SCG发送信号,以便尽快恢复SCG,从而进一步提高通信可靠性。
需要说明的是,上述最大发射功率方案和第一时间段方案可以独立实施,也可以结合使用。例如,终端设备可以第一最大发射功率,在第一时间段内的多个发送时刻向SCG发送信号。其中,第一时间段内的多个发送时刻可以包括上述第一时刻。
第二方面,提供一种通信方法。该方法包括:辅节点恢复终端设备已被挂起的辅小区组SCG。其中,辅节点用于管理SCG。
在一种可能的设计方案中,上述辅节点恢复终端设备已被挂起的辅小区组SCG,可以包括:辅节点恢复终端设备与SCG在分流信令无线承载SRB1和/或信令无线承载SRB3上的传输。
可选地,第二方面所述的通信方法还可以包括:辅节点接受终端设备发起的随机接入请求。其中,随机接入请求用于恢复SCG。
在一种可能的设计方案中,第二方面所述的通信方法还可以包括:辅节点从终端设备接收第二指示信息,并向主节点发送第二指示信息。其中,主节点用于管理终端设备的主小区组MCG,第二指示信息用于指示MCG发生的链路问题或指示MCG发生了链路问题。
可选地,第二指示信息可以包括在第一消息中传输。其中,第一消息可以为MCG失败消息,或包括MCG失败消息的另一消息,本申请实施例对此不做具体限定。
进一步地,第二方面所述的通信方法还可以包括:辅节点从主节点接收第一消息的响应消息,并向终端设备发送第一消息的响应消息。其中,第一消息的响应消息可以为RRC重配置消息或RRC释放消息。可选地,RRC重配置消息还可以用于指示终端设备挂起SCG。
在一种可能的设计方案中,第二方面所述的通信方法还可以包括:辅节点在第一时间段内从终端设备接收信号。其中,第一时间段可以包括根据MCG与SCG之间的时分复用图样,终端设备向MCG发送信号的时间段和终端设备向SCG发送信号的时间段。
可选地,上述辅节点在第一时间段内从终端设备接收信号,可以包括:辅节点从第一时刻开始,从终端设备接收信号。其中,第一时刻为第一时间段内的多个发送时刻中最早的发送时刻。
此外,第二方面所述的通信方法的技术效果可以参考第一方面所述的通信方法的技术效果,此处不再赘述。
第三方面,提供一种通信方法。该方法包括:主节点通过辅节点从终端设备接收第二指示信息。其中,主节点用于管理主小区组MCG,辅节点用于管理辅小区组SCG, 第二指示信息用于指示MCG发生的链路问题或指示MCG发生了链路问题。然后,主节点恢复MCG。
示例性地,第二指示信息可以包括在第一消息中传输。其中,第一消息可以为MCG失败消息,或包括MCG失败消息的另一消息,本申请实施例对此不做具体限定。
进一步地,第三方面所述的通信方法还可以包括:主节点通过辅节点向终端设备发送第一消息的响应消息。其中,第一消息的响应消息可以为RRC重配置消息或者RRC释放消息。
再进一步地,RRC重配置消息可以用于指示终端设备挂起SCG。
在一种可能的设计方案中,第三方面所述的通信方法还可以包括:主节点在第一时间段内通过辅节点从终端设备接收信号。其中,第一时间段可以包括根据MCG与SCG之间的时分复用图样,终端设备向MCG发送信号的时间段和终端设备向SCG发送信号的时间段。
此外,第三方面所述的通信方法的技术效果可以参考第一方面所述的通信方法的技术效果,此处不再赘述。
第四方面,提供一种通信装置。该通信装置包括:处理模块和收发模块。其中,处理模块,用于当控制收发模块检测到主小区组MCG发生链路问题,或MCG的信号质量低于信号质量阈值时,恢复挂起的辅小区组SCG。其中,MCG由主节点管理,SCG由辅节点管理。
在一种可能的设计方案中,处理模块,还用于恢复与SCG在分流信令无线承载SRB1和/或信令无线承载SRB3上的传输。
示例性地,处理模块可以包括无线资源控制RRC层实体和分组数据汇聚协议PDCP层实体。可选地,RRC层实体,用于向PDCP层实体发送第一指示信息。其中,第一指示信息用于指示恢复SCG。
进一步地,收发模块,还用于通过辅节点向主节点发送第二指示信息。其中,第二指示信息用于指示MCG发生的链路问题或指示MCG发生了链路问题。
可选地,收发模块,还用于在辅节点接受第四方面所述的通信装置发起的随机接入请求之后,通过辅节点向主节点发送第二指示信息。
示例性地,第二指示信息可以包括在第一消息中传输。其中,第一消息可以为MCG失败消息,或包括MCG失败消息的另一消息。
可选地,收发模块,还用于通过辅节点从主节点接收第一消息的响应消息。其中,第一消息的响应消息可以为RRC重配置消息或者RRC释放消息。可选地,RRC重配置消息可以用于指示终端设备挂起SCG。
在一种可能的设计方案中,处理模块,还用于在检测到MCG发生链路问题,或MCG的信号质量低于信号质量阈值之后,确定通信装置向SCG发送信号的最大发射功率为第一最大发射功率。其中,第一最大发射功率大于第二最大发射功率,第二最大发射功率为SCG被挂起前通信装置向SCG发送信号的最大发射功率。
在另一种可能的设计方案中,收发模块,还用于在第一时间段内向SCG发送信号。其中,第一时间段包括根据MCG与SCG之间的时分复用图样,通信装置向MCG发送信号的时间段和通信装置向SCG发送信号的时间段。
可选地,收发模块,还用于从第一时刻开始,向SCG发送信号。其中,第一时刻为第一时间段内的多个发送时刻中最早的发送时刻。
需要说明的是,上述第一最大发射功率方案和第一时间段方案可以独立实施,也可以结合实施。例如,收发模块可以第一最大发射功率,在第一时间段内的多个发送时刻向SCG发送信号。其中,第一时间段内的多个发送时刻可以包括上述第一时刻。
可选地,第四方面所述的通信装置还可以包括存储模块,该存储模块存储有程序或指令。当处理模块执行该程序或指令时,使得第四方面所述的通信装置执行第一方面所述的通信方法。
需要说明的是,第四方面所述的通信装置可以是终端设备,也可以是可设置于终端设备的芯片(***)或其他具有终端设备功能的部件,本申请对此不做限定。
此外,第四方面所述的通信装置的技术效果可以参考第一方面所述的通信方法的技术效果,此处不再赘述。
第五方面,提供一种通信装置。该通信装置用于管理SCG,该通信装置包括:处理模块和收发模块。其中,处理模块,用于控制收发模块与终端设备交互,以恢复终端设备已被挂起的辅小区组SCG。
在一种可能的设计方案中,处理模块,还用于恢复终端设备与SCG在分流信令无线承载SRB1和/或信令无线承载SRB3上的传输。
可选地,收发模块,还用于接受终端设备发起的随机接入请求。其中,随机接入请求用于恢复SCG。
在一种可能的设计方案中,收发模块,还用于从终端设备接收第二指示信息,并向主节点发送第二指示信息。其中,主节点用于管理终端设备的主小区组MCG,第二指示信息用于指示MCG发生的链路问题或指示MCG发生了链路问题。
可选地,第二指示信息可以包括在第一消息中发送。其中,第一消息可以为MCG失败消息,或包括MCG失败消息的另一消息。
进一步地,收发模块,还用于从主节点接收第一消息的响应消息,并向终端设备发送第一消息的响应消息。其中,第一消息的响应消息可以为RRC重配置消息或者RRC释放消息,RRC重配置消息用于指示终端设备恢复MCG,RRC释放消息用于指示终端设备释放RRC连接。可选地,RRC重配置消息还可以用于指示终端设备挂起SCG。
在一种可能的设计方案中,收发模块,还用于在第一时间段内从终端设备接收信号。其中,第一时间段包括根据MCG与SCG之间的时分复用图样,终端设备向MCG发送信号的时间段和终端设备向SCG发送信号的时间段。
可选地,收发模块,还用于从第一时刻开始,从终端设备接收信号。其中,第一时刻为第一时间段内的多个发送时刻中最早的发送时刻。
可选地,第五方面所述的通信装置还可以包括存储模块,该存储模块存储有程序或指令。当处理模块执行该程序或指令时,使得第五方面所述的通信装置执行第二方面所述的通信方法。
需要说明的是,第五方面所述的通信装置可以是辅节点,也可以是可设置于辅节点的芯片(***)或其他具有辅节点功能的部件,本申请对此不做限定。
此外,第五方面所述的通信装置的技术效果可以参考第一方面所述的通信方法的技术效果,此处不再赘述。
第六方面,提供一种通信装置。该通信装置用于管理主小区组MCG。该通信装置包括:处理模块和收发模块。其中,收发模块,用于通过辅节点从终端设备接收第二指示信息。其中,辅节点用于管理辅小区组SCG,第二指示信息用于指示MCG发生的链路问题或指示MCG发生了链路问题。处理模块,用于恢复MCG。
可选地,第二指示信息可以包括在第一消息中传输。其中,第一消息可以为MCG失败消息,或包括MCG失败消息的另一消息,本申请实施例对此不做具体限定。
进一步地,收发模块,还用于通过辅节点向终端设备发送第一消息的响应消息。其中,第一消息的响应消息为RRC重配置消息或者RRC释放消息,RRC重配置消息用于指示终端设备恢复MCG,RRC释放消息用于指示终端设备释放RRC连接。可选地,RRC重配置消息还可以用于指示终端设备挂起SCG。
在一种可能的设计方案中,收发模块,还用于在第一时间段内通过辅节点从终端设备接收信号。其中,第一时间段包括根据MCG与SCG之间的时分复用图样,终端设备向MCG发送信号的时间段和终端设备向SCG发送信号的时间段。
可选地,第六方面所述的通信装置还可以包括存储模块,该存储模块存储有程序或指令。当处理模块执行该程序或指令时,使得第六方面所述的通信装置可以执行第三方面所述的通信方法。
需要说明的是,第六方面所述的通信装置可以是主节点,也可以是可设置于主节点的芯片(***)或其他具有主节点功能的部件,本申请对此不做限定。
此外,第六方面所述的通信装置的技术效果可以参考第一方面所述的通信方法的技术效果,此处不再赘述。
第七方面,提供一种通信装置。该通信装置用于执行第一方面至第三方面中任一种可能的实现方式所述的通信方法。
第八方面,提供一种通信装置。该通信装置包括:处理器。其中,处理器,用于执行第一方面至第三方面中任一种可能的实现方式所述的通信方法。
第九方面,提供一种通信装置。该通信装置包括:处理器,该处理器与存储器耦合。其中,存储器用于存储计算机程序;处理器用于执行存储器中存储的计算机程序,以使得该通信装置执行如第一方面至第三方面中任一种可能的实现方式所述的通信方法。
在一种可能的设计中,第九方面所述的通信装置还可以包括收发器。该收发器可以为收发电路或输入/输出接口。所述收发器可以用于该通信装置与其他通信装置通信。
在本申请中,第九方面所述的通信装置可以为终端设备、辅节点或主节点,或者可设置于终端设备、辅节点或主节点的芯片(***)或其他部件。
第七方面至第九方面所述的通信装置的技术效果可以参考第一方面至三方面中所述的通信方法的技术效果,此处不再赘述。
第十方面,提供一种芯片***。该芯片***包括处理器和输入/输出端口,所述处理器用于实现第一方面至第三方面所涉及的处理功能,所述输入/输出端口用于实现第一方面至第三方面所涉及的收发功能。
在一种可能的设计中,该芯片***还包括存储器,该存储器用于存储实现第一方面至第三方面所涉及功能的程序指令和数据。
该芯片***,可以由芯片构成,也可以包含芯片和其他分立器件。
第十一方面,提供一种支持双连接的通信***。该通信***包括终端设备、辅节点和主节点。
第十二方面,提供一种计算机可读存储介质。该计算机可读存储介质包括计算机程序或指令;当该计算机程序或指令在计算机上运行时,使得该计算机执行第一方面至第三方面中任意一种可能的实现方式所述的通信方法。
第十三方面,提供一种计算机程序产品。该计算机程序产品包括计算机程序或指令,当该计算机程序或指令在计算机上运行时,使得该计算机执行第一方面至第三方面中任意一种可能的实现方式所述的通信方法。
图1为本申请实施例提供的支持双连接的通信***的架构示意图;
图2为本申请实施例提供的支持双连接的通信***的一种控制面架构示意图;
图3为本申请实施例提供的支持双连接的通信***的用户面架构示意图一;
图4为本申请实施例提供的支持双连接的通信***的用户面架构示意图二;
图5为本申请实施例提供的通信装置的结构示意图一;
图6为本申请实施例提供的通信方法的流程示意图;
图7为本申请实施例提供的采用CU/DU架构的接入网设备的结构示意图;
图8为本申请实施例提供的通信装置的结构示意图二。
下面将结合附图,对本申请中的技术方案进行描述。
本申请实施例的技术方案可以应用于各种支持双连接的通信***,例如无线保真(wireless fidelity,WiFi)***,车到任意物体(vehicle to everything,V2X)通信***、设备间(device-todevie,D2D)通信***、车联网通信***、第4代(4th generation,4G)移动通信***,如长期演进(long term evolution,LTE)***、全球互联微波接入(worldwide interoperability for microwave access,WiMAX)通信***、第五代(5th generation,5G)移动通信***,如新空口(new radio,NR)***,以及未来的通信***,如第六代(6th generation,6G)移动通信***等。
本申请将围绕可包括多个设备、组件、模块等的***来呈现各个方面、实施例或特征。应当理解和明白的是,各个***可以包括另外的设备、组件、模块等,并且/或者可以并不包括结合附图讨论的所有设备、组件、模块等。此外,还可以使用这些方案的组合。
另外,在本申请实施例中,“示例地”、“例如”等词用于表示作例子、例证或说明。本申请中被描述为“示例”的任何实施例或设计方案不应被解释为比其它实施例或设计方案更优选或更具优势。确切而言,使用示例的一词旨在以具体方式呈现概念。
本申请实施例中,“信息(information)”,“信号(signal)”,“消息(message)”,“信道(channel)”、“信令(singalling)”有时可以混用,应当指出的是,在不强 调其区别时,其所要表达的含义是一致的。“的(of)”,“相应的(corresponding,relevant)”和“对应的(corresponding)”有时可以混用,应当指出的是,在不强调其区别时,其所要表达的含义是一致的。
本申请实施例中,有时候下标如W
1可能会笔误为非下标的形式如W1,在不强调其区别时,其所要表达的含义是一致的。
本申请实施例描述的网络架构以及业务场景是为了更加清楚的说明本申请实施例的技术方案,并不构成对于本申请实施例提供的技术方案的限定,本领域普通技术人员可知,随着网络架构的演变和新业务场景的出现,本申请实施例提供的技术方案对于类似的技术问题,同样适用。
图1为本申请实施例提供的通信方法所适用的支持双连接的通信***的架构示意图。为便于理解本申请实施例,首先以图1中示出的通信***为例详细说明适用于本申请实施例的通信***。应当指出的是,本申请实施例中的方案还可以应用于其他移动通信***中,相应的名称也可以用其他移动通信***中的对应功能的名称进行替代。
如图1所示,该通信***包括终端设备、主节点、辅节点,以及由一个或多个核心网网元组成的核心网。
其中,终端设备可以与主节点和辅节点之间分别存在一个无线连接,即无线网络可以双连接的方式与终端设备通信,以便为终端设备提供高速率数据传输。依据主节点和辅节点各自支持的通信制式,双连接可以有多种实现方式,下面举例说明。
EN-DC(E-UTRA-NR dual connectivity),终端设备是连接到作为主节点的LTE制式的演进型节点(evolved Node B,eNB)和作为辅节点的NR制式的g节点(g Node B,gNB)。其中,主节点是连接到***核心网(4th core network,CN),如演进的分组核心网(evolved packet core network,EPC)的eNB。
NGEN-DC(next generation E-UTRA-NR dual connectivity),终端设备是连接到作为主节点的LTE制式的演进型节点(evolved Node B,eNB)和作为辅节点的NR制式的g节点(g Node B,gNB)。主节点是连接到第五代核心网(5th generation core,5GC)的eNB),该主节点也可以称为下一代演进型节点(next generation-eNB,ng-eNB)。
NE-DC(NR-E-UTRA dual connectivity),终端设备是连接到作为主节点的gNB和作为辅节点的LTE制式的eNB。其中,主节点是连接到5GC的gNB,辅节点是为终端设备提供与5GC之间的数据交互的eNB,也称为ng-eNB。
NR-DC(NR-NR dual connectivity),终端设备是连接到作为主节点的NR制式的gNB和作为辅节点的NR制式的gNB。主节点是连接到5GC的gNB。
应理解,双连接还可以存在其他实现方式,本申请实施例不再一一列举。
示例性地,图2为本申请实施例提供的支持双连接的通信***的一种控制面(control plane,CP)架构示意图。如图2所示,在双连接中,与核心网进行直接的控制面信令(signalling)交互(通过NG-C接口)的节点称为主节点(通常为一个),不与核心网进行直接的控制面信令交互的节点称为辅节点(可以有一个或多个,图2中仅示出了一个)。应理解,辅节点可以通过与主节点之间的控制面信令交互,如通过Xn-C接口,从而实现与核心网之间间接的控制面信令交互,即辅节点与核心网之间的控制面信令可以由主节点进行转发。
应理解,图2所示出的支持双连接的通信***的控制面架构示意图是以核心网为5GC,且主节点与辅节点之间的接口为Xn接口为例说明的。可选地,图2中所示出的核心网也可以为4G核心网,如LTE***中的EPC,则主节点与核心网之间的控制面信令交互可以通过S1-C接口进行。可选地,主节点与辅节点之间的接口也可以为X2接口,则辅节点与主节点之间的控制面信令交互可以通过X2-C接口进行。本申请实施例对于核心网的实现方式,以及主节点与辅节点之间的接口的实现方式,不做具体限定。
此外,终端设备与主节点和辅节点之间的控制面信令交互可以通过Uu口进行。如图2所示,在双链接中,主节点和辅节点都具有无线资源控制(radio resource control,RRC)层实体,都可以产生控制面信令,即各种RRC消息,如RRC建立/重建立消息、RRC配置/重配置消息、RRC释放消息、测量请求消息等。其中,主节点可以通过Uu口,直接向终端设备发送主节点产生的RRC消息。可选地,辅节点可以通过Uu口,直接向终端设备发送辅节点产生的RRC消息。应理解,此时终端设备也可以通过Uu口直接向辅节点发送终端设备产生的RRC消息,如RRC建立/重建立完成消息、RRC配置/重配置完成消息、测量报告。或者,可选地,辅节点也可以先通过辅节点与主节点之间的控制面接口,如Xn-C接口或X2-C接口,将辅节点产生的RRC消息发送给主节点,然后再由主节点通过Uu口向终端设备发送。其中,辅节点与终端设备之间直接传输的RRC消息是承载在信令无线承载(signalling radio bearer,SRB)3中。本申请实施例对于辅节点与终端设备之间的控制面信令的交互方式,不做具体限定。
进一步地,除上述控制面信令交互之外,主节点与核心网之间、主节点与辅节点之间还存在用户面(user plane,CP)数据(data)交互。可选地,辅节点与核心网之间也可以存在用户面数据交互。下面举例说明。
示例性地,图3为本申请实施例提供的支持双连接的通信***的用户面架构示意图一,适用于上述EN-DC的双连接架构。如图3所示,主节点和辅节点均具有多个无线链路控制(radio link control,RLC)层实体和媒体接入控制(media access control,MAC)层实体,且双连接中的数据无线承载(data radio bearer,DRB)可以包括MCG承载(MCG bearer)、SCG承载(SCG bearer)、分流承载(split bearer)中的一项或多项。其中,MCG承载是指该DRB的RLC层实体、MAC层实体只存在于主节点上,SCG承载是指该DRB的RLC层实体、MAC层实体只存在于辅节点上,分流承载是指该DRB的RLC层实体、MAC层实体同时存在于主节点和辅节点上。此外,对于PDCP终结在主节点上的承载,称为主节点终结型(MN terminated)承载,即下行(downlink,DL)数据从核心网直接到达主节点,且在主节点的PDCP层实体处理之后,再经由主节点和/或辅节点的RLC层实体、MAC层实体处理后向终端设备发送;相应地,上行(uplink,UL)数据从终端设备到达主节点和/或辅节点,且在主节点的PDCP层实体处理后向核心网发送。同理,对于PDCP终结在辅节点上的承载,称为辅节点终结型(SN terminated)承载,即下行数据从核心网直接到达辅节点,且在辅节点的PDCP层实体处理之后,再经由主节点和/或辅节点的RLC层实体、MAC层实体处理后向终端设备发送;相应地,上行数据从终端设备到达主节点和/或辅节点,且在辅节点的PDCP层实体处理后向核心网发送。
示例性地,图4为本申请实施例提供的支持双连接的通信***的用户面架构示意图二,适用于上述NGEN-DC、NE-DC、NR-DC的双连接架构,即核心网为5GC的双连接架构。参考图3,如图4所示,除上述各协议层实体之外,主节点和辅节点还包括服务数据适配协议(service data adaptation protocol,SDAP)层实体。其中,SDAP层实体用于当主节点或辅节点与核心网之间交互数据时,将核心网的服务质量(quality of service,QoS)流(QoS flow)映射到上述各DRB上向终端设备发送,或者将上述各DRB承载的数据映射到QoS流上向核心网发送。关于QoS流与DRB之间的映射,可以参考现有实现方式,本申请实施例对此不再赘述。
此外,对于一个双连接中的终端设备而言,辅节点的用户面可能与主节点连接的核心网有连接,即核心网可以通过辅节点与终端设备交换数据。
在双连接中,主节点中存在一个主小区(primary cell,PCell),辅节点中存在一个主辅小区(primary secondary cell,PSCell)。其中,主小区是指部署在主频点,且在终端设备发起初始连接建立过程或RRC连接重建立过程中接入的小区,或者在切换过程中指示为主小区的小区。主辅小区可以是终端设备向辅节点发起随机接入过程中接入的小区,或者终端设备在辅节点改变过程中跳过随机接入过程发起数据传输的另一辅节点上的小区,或者执行同步重配置流程时发起随机接入过程中接入的辅节点上的小区。为便于描述,在NR协议中,将主小区和主辅小区统称为特别小区(special cell,SpCell)。
进一步地,除主小区外,主节点上还可以存在一个或多个辅小区(secondary cell,SCell),同理,除主辅小区外,辅节点上还可以存在一个或多个辅小区。其中,主节点上为终端设备提供服务的小区,如主小区、主节点上的辅小区,可以统称为MCG,同理辅节点上为终端设备提供服务的小区,如主辅小区、辅节点上的辅小区,可以统称为SCG。在上述每个小区组中,特别小区和辅小区可以采用载波聚合(carrier aggregation,CA)的方式,共同为终端设备提供传输资源。
此外,对于处于连接态(RRC_CONNECTED)的终端设备,为其提供服务的小区称之为服务小区(serving cell)。应理解,对于未配置DC/CA的终端设备,其服务小区集合只包括主小区,即该终端设备的服务小区只有一个。而对于配置了DC/CA的终端设备,其服务小区集合可以包括上述特别小区和辅小区,即该终端设备的服务小区有多个。其中,每个小区对应一个成员载波(component carrier,CC)。
其中,上述主节点和辅节点也可统称为无线接入网(radio access network,RAN)设备或无线接入网网元或基站,是指位于上述通信***的网络侧,且具有无线收发功能的设备或可设置于该设备的芯片(***)或其他具备接入网设备功能的部件。该接入网设备包括但不限于:无线保真(wireless fidelity,WiFi)***中的接入点(access point,AP),如家庭网关、路由器、服务器、交换机、网桥等,演进型节点B(evolved Node B,eNB)、无线网络控制器(radio network controller,RNC)、节点B(Node B,NB)、基站控制器(base station controller,BSC)、基站收发台(base transceiver station,BTS)、家庭基站(例如,home evolved Node B,或home Node B,HNB)、基带单元(baseband unit,BBU),无线中继节点、无线回传节点、传输点(transmission and reception point,TRP或者transmission point,TP)等,还可以为5G,如,新空口(new radio,NR)***中的gNB,或,传输点(TRP或TP),5G***中的基站的一个或一组(包括多个天线面板)天线面板,或者,还可以为构成gNB或传输点的网络节点,如基带单元(baseband unit,BBU),或,分布式单元(distributed unit,DU)、具有基站功能的路边单元(road side unit,RSU)等。
上述终端设备为接入上述通信***,且具有无线收发功能的终端或可设置于该设备的芯片(***)或其他具备终端功能的部件。该终端设备也可以称为用户装置、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。本申请的实施例中的终端设备可以是手机(mobile phone)、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实(virtual reality,VR)终端设备、增强现实(augmented reality,AR)终端设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端、车载终端、具有终端功能的RSU等。本申请的终端设备还可以是作为一个或多个部件或者单元而内置于车辆的车载模块、车载模组、车载部件、车载芯片或者车载单元,车辆通过内置的所述车载模块、车载模组、车载部件、车载芯片或者车载单元可以实施本申请提供的通信方法。
上述核心网网元又称为核心网设备,是指为终端设备提供业务支持的核心网(core network,CN)中的设备,包括但不限于:接入和移动性管理功能(access and mobility management function,AMF)网元、会话管理功能(session management function,SMF)网元、用户面功能(user plane function,UPF)网元等。其中,所述AMF网元可以负责终端设备的接入管理和移动性管理;所述SMF网元可以负责会话管理,如会话建立、修改等;所述UPF网元可以是用户面功能实体,主要负责从外部网络,如数据网络(data network,DN)获取数据。
需要说明的是,本申请中网元也可以称为实体或功能实体,例如,AMF网元也可以称为AMF实体或AMF功能实体。又例如,SMF网元也可以称为SMF实体或SMF功能实体等。
需要说明的是,本申请实施例提供的通信方法,可以适用于图1所示的终端设备与辅节点和/或主节点之间的通信,以及辅节点与主节点之间的通信。
应理解,图1-图4仅为便于理解而示例的简化示意图,该通信***中还可以包括其他网络设备,和/或,其他终端设备,图1-图4中未予以画出。
示例性地,图5为本申请实施例提供的通信装置的结构示意图一。该通信装置可以是终端设备或辅节点或主节点,也可以是可应用于终端设备或辅节点或主节点的芯片(***)或者其他部件。
如图5所示,通信装置500可以包括处理器501。可选地,通信装置500还可以包括存储器502和/或收发器503。其中,处理器501可以与存储器502和/或收发器503耦合,如相互之间存在电信号连接。
下面结合图5对通信装置500的各个构成部件进行具体的介绍:
处理器501是通信装置500的控制中心,可以是一个处理器,也可以是多个处理 元件的统称。例如,处理器501是一个或多个中央处理器(central processing unit,CPU),也可以是特定集成电路(application specific integrated circuit,ASIC),或者是被配置成实施本申请实施例的一个或多个集成电路,例如:一个或多个微处理器(digital signal processor,DSP),或,一个或者多个现场可编程门阵列(field programmable gate array,FPGA)。
其中,处理器501可以通过运行或执行存储在存储器502内的软件程序,以及调用存储在存储器502内的数据,执行通信装置500的各种功能。
在具体的实现中,作为一种实施例,处理器501可以包括一个或多个CPU,例如图5中所示的CPU0和CPU1。
在具体实现中,作为一种实施例,通信装置500也可以包括多个处理器,例如图5中所示的处理器501和处理器504。这些处理器中的每一个可以是一个单核处理器(single-CPU),也可以是一个多核处理器(multi-CPU)。这里的处理器可以指一个或多个通信设备、电路、和/或用于处理数据(例如计算机程序指令)的处理核。
其中,存储器502可以是只读存储器(read-only memory,ROM)或可存储静态信息和指令的其他类型的静态存储通信设备,随机存取存储器(random access memory,RAM)或者可存储信息和指令的其他类型的动态存储通信设备,也可以是电可擦可编程只读存储器(electrically erasable programmable read-only memory,EEPROM)、只读光盘(compact disc read-only memory,CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其他磁存储通信设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质,但不限于此。存储器502可以和处理器501集成在一起,也可以独立存在,并通过通信装置500的输入/输出端口(图5中未示出)与处理器501耦合,本申请实施例对此不作具体限定。
存储器502用于存储执行本申请方案的软件程序,并由处理器501来控制执行。上述具体实现方式可以参考下述方法实施例,此处不再赘述。
其中,收发器503,用于实现与其他通信装置之间的通信。例如,通信装置500为终端设备,收发器503可以用于与主节点和/或辅节点通信,或者与另一个终端设备通信。又例如,通信装置500为接入网设备,如上述主节点或辅节点,收发器503可以用于与终端设备通信,或者与另一个接入网设备通信,或者与核心网网元通信。此外,收发器503可以包括接收器和发送器(图5中未单独示出)。其中,接收器用于实现接收功能,发送器用于实现发送功能。收发器503可以和处理器501集成在一起,也可以独立存在,并通过通信装置500的输入/输出端口(图5中未示出)与处理器501耦合,本申请实施例对此不作具体限定。
需要说明的是,图5中示出的通信装置500的结构并不构成对该通信装置的限定,实际的通信装置可以包括比图示更多或更少的部件,或者组合某些部件,或者不同的部件布置。
下面将结合图6-图7对本申请实施例提供的通信方法进行具体阐述。
图6为本申请实施例提供的通信方法的流程示意图。该通信方法可以适用于图1-图4中任一项所示的终端设备与辅节点之间的通信,以及辅节点与主节点之间的通信。
如图6所示,该通信方法包括如下步骤:
S601,当检测到主小区组MCG发生链路问题,或MCG的信号质量低于第一信号质量阈值时,终端设备恢复挂起的辅小区组SCG。
其中,MCG由主节点管理,SCG由辅节点管理。也就是说,主节点用于管理终端设备的MCG,辅节点用于管理终端设备的SCG。关于主节点、辅节点、MCG、SCG的具体实现方式,可以参考上述***实施例,此处不再赘述。
需要说明的是,在S601之前,终端设备挂起SCG。终端设备挂起SCG的操作可以采用任意一种触发方式,本申请对此不做限定。比如主节点或辅节点通知终端设备挂起SCG;或者终端设备请求主节点或辅节点挂起SCG,之后主节点或辅节点向终端设备发送挂起SCG的确认信息。
可选的,当检测到主小区组MCG发生链路问题,或MCG的信号质量低于第一信号质量阈值,且网络侧(比如主节点)为终端设备配置了快速MCG链路恢复功能时,终端设备恢复挂起的辅小区组SCG。快速MCG链路恢复功能是指在MR-DC中,当终端设备检测到MCG发生链路问题时,终端设备通过SCG向主节点发送指示信息,该指示信息用于指示MCG发生的链路问题或指示MCG发生了链路问题。
需要说明的是,在一种可能的实现方式中,上述S601,可以理解为仅包括终端设备的内部操作(即下述步骤一)。
步骤一,当检测到主小区组MCG发生链路问题,或MCG的信号质量低于第一信号质量阈值时,终端设备确定挂起的辅小区组SCG中的待恢复小区。
在本申请实施例中,终端设备挂起(suspend/suspension)SCG,可以理解为终端设备暂停通过SCG的通信链路进行信令传输和/或数据传输,但终端保留或存储SCG的部分或全部配置,以用于快速恢复所述SCG的通信链路。在本申请实施例中,“挂起”也可以称为去激活(deactive/deactivation)或者休眠。去激活状态(deactived state)也可以称为挂起状态或休眠状态或非活跃状态等。关于挂起SCG,可以参考现有实现方式,本申请实施例不再赘述。需要说明的是,当SCG被挂起时,终端设备仍然处于连接态(RRC_CONNECTED)。
可选的,当终端设备在SCG中的部分或全部小区中实施DRX和/或DTX时,终端设备挂起SCG还可以包括:终端设备暂停与SCG在分流SRB1和/或SRB3上的传输。其中,分流SRB1用于在分流承载模式中,终端设备与主小区组之间的信令交互,该信令可以通过主小区组和/或辅小区组发送给终端设备,SRB3用于在终端设备与辅小区组之间的直接信令交互。可选的,终端设备挂起SCG还可以进一步包括:终端设备挂起与SCG在分流承载(split bearer)和/或SCG无线承载(SCG bearer)上的数据传输。
需要说明的是,此处所述的终端设备在SCG中的部分或全部小区中实施DRX和/或DTX时,终端设备暂停与SCG在分流SRB1和/或SRB3上的传输,可以和本实施例中由于当检测到主小区组MCG发生链路问题或MCG的信号质量低于第一信号质量阈值时恢复挂起的SCG独立实施或结合实施。也就是说,当网络侧通知终端设备在SCG中实施DRX和/或DTX时,网络侧还可以通知终端设备暂停与SCG在分流SRB1和/或SRB3上的传输。这样的话,终端设备只需要在恢复的SCG中发送信令,而不需 要从DRX和/或DTX中恢复后再发送上行信号,从而降低终端设备的功耗。当终端设备检测到主小区组MCG发生链路问题或MCG的信号质量低于第一信号质量阈值时,终端设备可以确定挂起的SCG需要恢复,也可以按照现有技术进行处理,如终端设备可以发起RRC重建立流程或其他技术处理,本申请实施例对此不做具体限定。
此外,对于SCG中的不同小区,可以采用相同或不同的挂起方式。例如,SCG包括小区A、小区B、小区C和小区D,其中在小区D中实施DRX和/或DTX。对于小区A,可以采用去激活的方式实现挂起,对于小区B,可以采用休眠方式实现挂起,对于小区C可以采用进入非激活(inactive)状态的方式实现挂起,对于小区D,可以采用暂停DRX传输和/或DTX传输的方式实现挂起。
进一步地,对于采用上述任一方式挂起的任一小区,可以只挂起终端设备与该任一小区之间的信令传输,也可以只挂起终端设备与该任一小区之间的数据传输,还可以同时挂起终端设备与该任一小区之间的信令传输和数据传输,本申请实施例对此不做具体限定。
示例性地,上述信号质量可以用如下一项或多项参数表征:参考信号接收功率(reference signal received power,RSRP)、参考信号接收质量(reference signal received quality,RSRQ)、信号干扰噪声比(signal to interference plus noise ratio,SINR)。相应地,第一信号质量阈值可以包括如下一项或多项:第一RSRP阈值、第一RSRQ阈值、第一SINR阈值。相应地,上述MCG的信号质量低于第一信号质量阈值可以包括如下一项或多项:终端设备检测到的MCG的RSRP小于或等于第一RSRP阈值、终端设备检测到的MCG的RSRQ小于或等于第一RSRQ阈值、终端设备检测到的MCG的SINR小于或等于第一SINR阈值。第一信号质量阈值可以是主节点发送给终端设备的,也可以是终端设备通过其他方式获取的,本发明并不限定。
示例性地,上述主小区组MCG发生链路问题,可以包括如下一项或多项:MCG发生了RLF、MCG或PCell发生了切换失败或RRC重配置失败(如终端设备无法遵从MCG发送的RRC重配置消息中的部分配置)、终端设备的RRC层从底层,如PDCP层接收到SRB1或SRB2完整性校验失败的指示信息(该指示信息可以不包括RRC重建立消息的完整性校验失败的指示信息),以及其他导致MCG链路通信异常的问题,本申请实施例对此不做具体限定。
其中,上述主小区组MCG发生了RLF可以包括如下一项或多项:终端设备检测到MCG的下行信号质量小于或等于第二信号质量阈值,或终端设备的RRC层从MCG MAC实体接收到随机接入问题指示,其中所述MCG MAC实体可以是指终端设备的MAC层中与MCG对应的MAC实体,或从MCG RLC实体接收到某个SRB或DRB的数据包达到了最大重传次数,其中所述MCG RLC实体可以是指终端设备的RLC层中与MCG对应的RLC实体。可以理解,终端设备的MAC层或RLC层中除了分别有与MCG对应的实体,还可以有与SCG对应的MAC实体或者RLC实体。其中,MCG的下行信号质量小于或等于第二信号质量阈值,可以是:终端设备的RRC层从物理层接收到PCell的N个连续的失步指示,之后,终端设备可以启动一个定时器T310,若在T310超时之前,终端设备的RRC层没有从物理层接收到PCell的M个连续的同步指示,则终端设备认为MCG发生了RLF,其中,N和M为大于或等于1的整数,N 和M的值可以由网络侧预先配置给终端设备。此外,第二信号质量阈值还可以包括如下一项或多项:第二RSRP阈值、第二RSRQ阈值、第二SINR阈值。相应地,MCG的下行信号质量小于或等于第二信号质量阈值,可以包括如下一项或多项:终端设备检测到的MCG的RSRP小于或等于第二RSRP阈值、终端设备检测到的MCG的RSRQ小于或等于第二RSRQ阈值、终端设备检测到的MCG的SINR小于或等于第二SINR阈值。需要说明的是,本发明中MCG的下行信号质量可以是指终端设备测量到的MCG中所有小区的下行信号质量的综合下行信号质量,也可以是指终端设备测量到的MCG中PCell的下行信号质量。
应理解,上述信号质量、第一信号质量阈值、第二信号质量阈值还可以采用其他技术指标来实现,本申请实施例对此不做具体限定。
需要说明的是,在MCG从通信正常到发生无线链路问题的过程中,上述信号质量小于或等于第一信号质量阈值,通常会先于信号质量小于或等于第二信号质量阈值发生。也就是说,第一RSRP阈值大于第二RSRP阈值,第一RSRQ阈值大于第二RSRQ阈值,第一SINR阈值大于第二SINR阈值。如此,终端设备可以在MCG发生链路问题之前,提前恢复SCG,以便当MCG发生链路问题时,可以通过提前恢复的SCG尽快通知主节点MCG发生的链路问题,即可以尽早执行下述S603-S604以恢复MCG,减少终端设备与MCG之间的通信中断时间,从而提高终端设备与MCG之间的通信可靠性。
与上述终端设备挂起SCG的具体实现方式相对应,终端设备可以采用如下方式恢复SCG:激活SCG中被去激活的部分或全部小区、唤醒SCG中进入休眠状态的部分或全部小区、激活SCG中处于非激活状态的部分或全部小区等,本申请实施例不再赘述。
可选的,当终端设备在SCG中的部分或全部小区中实施DRX和/或DTX时,终端设备恢复SCG还可以包括:终端设备恢复与SCG中已被暂停实施DRX和/或DTX的小区在分流信令无线承载SRB1和/或信令无线承载SRB3上的传输。
可选的,终端设备恢复SCG还可以包括:终端设备恢复与SCG中已被暂停实施DRX和/或DTX的小区在分流无线承载和/或SCG承载上的数据传输。
以上述SCG包括小区A、小区B、小区C和小区D为例进行说明。对于小区A,可以采用激活的方式恢复,对于小区B,可以采用唤醒方式恢复,对于小区C可以采用进入激活状态的方式恢复,对于小区D,可以采用恢复实施DRX和/或DTX的方式恢复。
此外,对于采用上述任一方式挂起的任一小区,可以只恢复终端设备与该任一小区之间的部分或全部信令传输,也可以只恢复终端设备与该任一小区之间的部分或全部数据传输,还可以同时恢复终端设备与该任一小区之间的部分或全部信令传输,以及部分或全部数据传输,本申请实施例对此不做具体限定。
在一种可能的设计方案中,上述步骤一中终端设备确定挂起的辅小区组SCG中的待恢复小区,可以包括:终端设备确定恢复与SCG中的待恢复小区在分流信令无线承载SRB1和/或信令无线承载SRB3上的传输。其中,分流SRB1用于在分流承载模式中,终端设备与主小区组之间的信令交互,该信令可以通过主小区组和/或主小区组发 送给终端设备,SRB3用于终端设备与主辅小区组之间的直接信令交互。可选的,恢复挂起的辅小区组SCG还可以进一步包括:终端设备恢复与SCG在分流无线承载(即split bearer)和/或SCG无线承载(即SCG bearer)上的数据传输。
示例性地,终端设备可以包括无线资源控制RRC层实体和分组数据汇聚协议PDCP层实体。可选地,图6所示的通信方法还可以包括:终端设备的无线资源控制RRC层实体向终端设备的分组数据汇聚协议PDCP层实体发送第一指示信息。其中,第一指示信息用于指示恢复SCG,如SCG的恢复方式和恢复内容,其中恢复内容可以包括:恢复SCG中的哪些小区,以及每个小区中需要恢复的信令无线承载和/或数据无线承载。
可选的,第一指示信息可以用于指示恢复终端设备与SCG在分流SRB1和/或SRB3的信令传输。进一步地,第一指示信息可以用于指示恢复终端设备与SCG在分流无线承载(split bearer)或SCG承载(SCG bearer)上的数据传输。
可选地,上述终端设备挂起SCG,当检测到主小区组MCG发生链路问题,或MCG的信号质量低于第一信号质量阈值时,步骤S601终端设备恢复挂起的SCG,可以包括上述步骤一,和/或,终端设备请求辅节点恢复终端设备与SCG之间的通信,即下述步骤二。下面具体说明步骤二。
步骤二,终端设备与辅节点交互,以恢复终端设备与辅节点在SCG上的传输。
在一种可能的设计方案中,上述步骤二可以包括:终端设备向辅节点发起随机接入过程。例如,终端设备向辅节点发送随机接入请求前导。相应地,辅节点向终端设备发送随机接入响应消息。其中,随机接入请求前导用于终端设备请求接入辅节点,随机接入响应消息用于通知终端设备辅节点是否接受终端设备发起的随机接入请求。若辅节点接受终端设备发起的随机接入请求,则随机接入响应消息可以携带接受指示信息、以及辅节点为终端设备分配的无线资源的配置信息,如终端设备发送下一个信息(比如终端设备发送MAC控制元素,该MAC控制元素携带辅节点为终端设备分配的小区无线网络临时标识(cell radio network temporary identifier,C-RNTI))的资源分配信息。若辅节点拒绝终端设备发起的随机接入请求,则随机接入响应消息可以携带拒绝指示信息或者辅节点不发送随机接入响应。
可选的,辅节点收到终端设备发送的携带辅节点为终端设备分配的C-RNTI的MAC控制元素之后,辅节点就知道终端设备请求恢复SCG,从而可以恢复已挂起的SCG。可选的,在随机接入过程中或之后,终端设备会给SCG发送一个恢复SCG的请求消息。可选的,该恢复SCG的请求消息可以是请求恢复终端设备与SCG在分流SRB1和/或SRB3的传输。进一步的,第一指示信息还可以用于指示恢复终端设备与SCG在分流承载或SCG承载的传输。可选的,当终端设备在SCG对应的定时校准(time alignment,TA)定时器(timer)超时(例如,超过网络侧(比如辅节点)下发的时间阈值),终端设备向辅节点发起随机接入过程。
在另一种可能的设计方案中,上述步骤二,终端设备与辅节点交互,以恢复终端设备与辅节点在SCG上的传输,可以包括:终端设备向辅节点发送上行物理控制信道(physical uplink control channel,PUCCH)。当辅节点收到该上行物理控制信道时,辅节点就会向终端设备发送下一个信息(比如下述S603中的第一消息或者终端设备给 SCG发送的一个恢复SCG的请求消息)的资源分配信息。辅节点收到终端设备发送的PUCCH之后,辅节点就知道终端设备请求恢复SCG,从而可以恢复已挂起的SCG。可选的,当终端设备在SCG对应的定时校准定时器没有超时,终端设备向辅节点发送上行物理控制信道。
可选地,辅节点可以恢复终端设备与SCG在分流信令无线承载SRB1和/或信令无线承载SRB3上的传输,即恢复信令传输。例如,恢复终端设备与主辅小区在分流SRB1和/或SRB3是的传输。如此,终端设备可以主动恢复与主辅小区之间的信令传输,以恢复终端设备与网络侧之间的通信,从而提高通信可靠性。
可选地,辅节点还可以恢复终端设备与主辅小区在DRB上的传输,即恢复数据传输。如此,终端设备还可以主动恢复与主辅小区之间的数据传输,以便为终端设备提供数据传输服务。
进一步地,辅节点还可以恢复终端设备与SCG中的一个或多个辅小区在SRB和/或DRB上的传输,即恢复SCG中的部分或全部辅小区的信令传输和/或数据传输,以便为终端设备提供更高速率的数据传输服务。
关于SCG的恢复方式和恢复内容的具体实现方式,可以参考步骤一中的相关内容,此处不再赘述。
可选的,当检测到主小区组MCG发生链路问题,或MCG的信号质量低于第一信号质量阈值,且终端设备未检测到辅小区组SCG发生链路问题(即终端设备与辅节点之间的链路正常),或SCG的信号质量高于第三信号质量阈值时,终端设备恢复挂起的辅小区组SCG。其中检测到辅小区组SCG发生链路问题的具体含义可以是:终端设备的RRC层从物理层接收到PSCell的N1个连续的失步指示,之后,终端设备可以启动一个定时器T310,若在T310超时之前,终端设备的RRC层没有从物理层接收到PSCell的M1个连续的同步指示,则终端设备认为SCG发生了RLF,其中,N1和M1为大于或等于1的整数,N1和M1的值可以由网络侧预先配置给终端设备。SCG的下行信号质量高于第三信号质量阈值,可以包括如下一项或多项:终端设备检测到的SCG的RSRP大于第三RSRP阈值、终端设备检测到的SCG的RSRQ大于第三RSRQ阈值、终端设备检测到的SCG的SINR大于第三SINR阈值。需要说明的是,本发明中SCG的下行信号质量可以是指终端设备测量到的SCG中所有小区的下行信号质量的综合下行信号质量,也可以是指终端设备测量到的SCG中PSCell的下行信号质量。
在一种可能的设计方案中,图6中所示出的通信方法还可以包括:在检测到MCG发生链路问题,或MCG的信号质量低于信号质量阈值之后,终端设备向SCG发送信号的最大发射功率为第一最大发射功率。其中,第一最大发射功率大于第二最大发射功率,第二最大发射功率为SCG被挂起前终端设备向SCG发送信号的最大发射功率。也就是说,终端设备可以尽可能大的发射功率向SCG发送信号,如发送上述随机接入请求消息,以尽快恢复SCG,从而进一步提高通信可靠性。
在本申请实施例中,鉴于SCG中的小区均为辅节点上的小区,终端设备向SCG发送信号,也可以理解为终端设备通过SCG向辅节点发送信号,或终端设备向辅节点发送信号。
具体地,对于同一终端设备而言,其所支持的最大发射功率为终端设备的总最大 发射功率。在双连接中,终端设备向MCG发送信号的实际发射功率(下文称之为第一发射功率),以及终端设备向SCG发送信号的实际发射功率(下文称之为第二发射功率)之和,在任一时刻均不得超出该总最大发射功率。具体地,若终端设备采用时分复用(time division multiplexing,TDM)方式发送信号,即终端设备向MCG发送信号的发送时间段与终端设备向SCG发送信号的发送时间段中的不重叠部分(下文简称为不重叠),则第一发射功率或第二发射功率可以小于或等于该总最大发射功率。当然,若终端设备向MCG发送信号的发送时间段与终端设备向SCG发送信号的发送时间段的重叠部分(下文简称为重叠),即终端设备同时向MCG和SCG发送信号,则第一发射功率和第二发射功率之和也要小于或等于该总最大发射功率。
应理解,在实际应用中,上述第一发射功率、第二发射功率的具体取值还可以结合如下一项或多项共同确定:网络侧配置的终端设备在MCG上的最大发射功率、终端设备在SCG上的最大发射功率,以及预定义的终端设备在MCG上的最大发射功率、终端设备在SCG上的最大发射功率。下面举例说明。
方式1(Option 1):在没有挂起SCG时,MCG和SCG之间的半静态功率共享方案为:终端设备在一个CG,如CG1中有上行传输时,终端设备核对另一个CG,如CG2中配置的半静态传输方向配置,如某个符号是用于上行传输或下行传输或可灵活配置。其中,灵活配置是指可能是上行也可能是下行,具体可由终端设备自行确定。具体地,网络侧事先会通知终端设备某个符号对应的半静态传输方向为上行传输,还是下行传输,还是灵活配置。如果CG1上的上行传输与CG2的上行传输可能存在重叠部分,如在某个符合或某些符号上,CG2中的某些载波上被配置的半静态传输方向也为上行传输,或灵活配置,则终端设备限制在CG1中的实际发送功率不超过网络侧配置的最大发射功率(网络侧可通过RRC消息事先配置给终端设备的。否则(即不重叠),终端设备在CG1中的上行传输的最大发射功率为预定义的取值。
方式2(Option 2):在没有挂起SCG时,MCG和SCG之间的半静态功率共享方案为:终端设备在每一个CG中的最大发射功率都不能超过网络侧配置给终端设备的在对应CG中的最大发射功率。此时,终端设备无需判断两个CG中的上行传输是否重叠,每个CG中的最大发射功率只需要考虑不超出网络配置的该最大发射功率即可。
方式3:在没有挂起SCG时,MCG和SCG之间的动态功率共享方案为:当某个CG,如CG1上有上行信号发送时,如果CG1上的上行传输和另外一个CG,如CG2上的上行传输有重叠,则终端设备在CG1的上行传输的最大发射功率不超过网络侧配置给终端设备的在CG1上的最大发射功率。否则(不重叠),终端设备在CG1的上行传输的最大发射功率不超过协议预定义的取值,如RAN4协议定义的最大发射功率。具体地,终端设备可以通过如下方案判断在两个CG上的上行传输是否有重叠:当SCG上的上行传输的起始点为T0时,终端设备会考虑在T0-T_offset之前,是否存在物理下行控制信道(physical downlink control channel,PDCCH)调度的MCG上行传输与SCG上行传输重叠。其中,T_offset为MCG上行传输相对应SCG上行传输的时间提前量。如果重叠,则终端设备在SCG上的最大发射功率为:min{网络侧配置的SCG的最大发射功率,终端设备的总最大发射功率-MCG的实际的发射功率},其中运算符 min{x,y}表示求取x、y中的最小值。否则(没有重叠),则终端设备在SCG上的最大发射功率为终端设备的总最大发射功率。
结合上述方式1-方式3,当终端设备的SCG被挂起时,终端设备在MCG上的最大发射功率,可以与当终端设备的SCG正常时终端设备在MCG上的最大发射功率不同,即终端设备可以采用最大发射功率向MCG发送信号。例如,网络侧为终端设备配置的功率共享模式为上述方式1,则终端设备向MCG发送信号的最大发射功率可以不超过协议预定义的最大发射功率,如RAN4协议定义的最大发射功率。又例如,网络侧为终端设备配置的功率共享模式为上述方式2,则终端设备向MCG发射信号的最大发射功率可以不超过网络侧配置的最大发射功率。再例如,网络侧为终端设备配置的功率共享模式为上述方式3,则终端设备向MCG发射信号的最大发射功率可以不超过网络侧配置的最大发射功率。再例如,不管采用哪一种共享模式,终端设备向MCG发射信号的最大发射功率可以不超过终端设备的总最大发射功率。
同理,在本申请实施例中,当终端设备检测到MCG发生链路问题,和/或,MCG的信号质量小于或等于信号质量阈值时,终端设备可以暂停向MCG发送信号,而是可使用全部可用发射功率,如上述总最大发射功率用于向SCG发送信号(即只需要保证终端设备向SCG发射信号的最大发射功率不超过总最大发射功率即可)。也就是说,此时终端设备可以不考虑终端设备向MCG发送信号的发送时间段与终端设备向SCG发送信号的发送时间段是否重叠,即终端设备可以不受网络配置的MCG与SCG之间的功率的限制,以尽可能大的发射功率与辅节点交互,以求尽快恢复被挂起的SCG,从而恢复终端设备与网络侧之间的通信,以提高通信可靠性。
在另一种可能的设计方案中,图6中所示出的通信方法还可以包括:终端设备在第一时间段内向SCG发送信号,如终端设备发送的随机接入请求消息,以及下述第一消息等。相应地,辅节点在第一时间段内从终端设备接收信号。
其中,第一时间段包括根据MCG与SCG之间的时分复用图样(TDM pattern),终端设备向MCG发送信号的时间段和终端设备向SCG发送信号的时间段。也就是说,终端设备可以不必考虑之前网络侧配置的MCG与SCG之间的时分复用的限制,即终端设备可以在原本用于向MCG和SCG发送信号的所有时间段内向SCG发送信号,以便尽快恢复SCG,从而进一步提高通信可靠性。
可选地,上述终端设备在第一时间段内向SCG发送信号,可以包括:终端设备从第一时刻开始,向SCG发送信号。其中,第一时刻为第一时间段内的多个发送时刻(又称为发送时机,transmission occasion)中最早的发送时刻。如此,终端设备可以在最早发送时刻向SCG发送信号,以便尽快恢复SCG,从而进一步提高通信可靠性。
需要说明的是,上述第一最大发射功率方案和第一时间段方案可以独立实施,也可以结合实施。例如,终端设备可以第一最大发射功率,在第一时间段内的多个发送时刻向SCG发送信号。进一步地,第一时间段内的多个发送时刻可以包括上述第一时刻。
以上详细说明了终端设备如何请求辅节点恢复SCG,下面结合接入网设备的一种物理架构示例,详细说明辅节点在恢复SCG过程中的具体操作。
示例性地,图7为本申请实施例提供的一种接入网设备的架构示意图。其中,该 接入网设备可以为上述主节点或辅节点。如图7所示,该接入网设备包括CU和DU,CU可以进一步划分为CU-CP和CU-UP,且CU-CP与DU之间通过F1-C接口通信,CU-UP与DU之间通过F1-U接口通信,CU-CP与CU-UP之间通过E1接口通信。
如图7所示,当辅节点的DU从终端设备接收到上行信息(例如收到前面所述的随机接入过程或者PUCCH相关的信息)时,辅节点的DU可以恢复终端设备在SCG上的传输。可选的,辅节点的DU可以通知或请求CU-CP恢复终端设备在辅节点中的SCG传输。可选的,当辅节点的CU-CP收到该通知或请求时,CU-CP可以进一步通知CU-UP恢复终端设备在辅节点中的SCG传输。在另一种可能的设计方案中,当辅节点的CU收到终端设备发送的下面所述S603中的第一消息之后,CU再通知DU恢复终端设备在SCG上的数据和/或信令传输。
可选的,如果辅节点的DU中不存在终端设备的上下文信息时,如挂起SCG时,辅节点的CU已通知辅节点的DU删除了终端设备的上下文信息,则当辅节点的DU收到终端设备发送的上行数据时,辅节点的DU会先向CU发送初始上行RRC消息传输(initial UL RRC message transfer)消息,之后辅节点的CU再与辅节点的DU交互,以建立终端设备的上下文,如辅节点的CU可以向辅节点的DU发送UE上下文建立请求(UE context setup request)消息,然后从辅节点的DU接收UE上下文建立响应(UE context setup response)消息。
需要说明的是,在执行上述S601,如执行步骤一,或者执行步骤一和步骤二之后,终端设备还可以通过辅节点向主节点发送MCG发生的链路问题或MCG发生了链路问题。因此,可选地,该通信方法还可以包括S602-S604:
S602,终端设备通过辅节点向主节点发送第一消息。相应地,主节点通过辅节点从终端设备接收第一消息。
其中,第一消息包括第二指示信息,第二指示信息用于指示MCG发生的链路问题或指示MCG发生了链路问题。其中,MCG发生的链路问题的具体实现可以参考上述步骤一,此处不再赘述。如此,主节点可以据此恢复MCG,如指示终端设备执行切换流程或重配置流程,从而进一步提高通信可靠性。
需要说明的是,在主节点接收到第一消息之前,主节点认为终端设备的SCG被挂起。主节点收到第一消息之后,主节点获知终端设备恢复了挂起的辅小区组SCG。
在一种可能的设计方案中,上述S602,终端设备通过辅节点向主节点发送第一消息,可以包括:在辅节点接受终端设备发起的随机接入请求之后,如在终端设备从辅节点接收到携带接受指示的随机接入响应之后,终端设备通过辅节点向主节点发送第一消息。
其中,辅节点可以执行如下步骤:在辅节点向终端设备发送携带有接受指示的随机接入响应之后,辅节点从终端设备接收第一消息,并通过主节点与辅节点之间的接口,如Xn接口或X2接口,向主节点发送第一消息。
相应地,上述S602,主节点通过辅节点从终端设备接收第一消息,可以包括:辅节点通过空口从所述终端设备接收该第一消息;进而,主节点可以通过主节点与辅节点之间的接口,如Xn接口或X2接口,从辅节点接收第一消息。比如主节点通过Xn接口或X2接口中的RRC传输(RRC Transfer)消息接收到第一消息,也即RRC传输 消息中携带了第一消息。
上述第一消息可以为MCG失败信息(MCGFailureInformation)消息。下面分别举例说明。
例如,在分流SRB1场景下,终端设备通过辅节点向主节点发送MCG失败信息消息。具体地,辅节点在从终端设备接收到MCG失败信息消息后,向主节点发送RRC传输消息,其中RRC传输消息中携带了MCG失败信息消息。在此场景下,辅节点直接向主节点发送接收到的MCG失败信息消息,而不需要从其他RRC消息中取出MCG失败信息消息。相应地,主节点在接收到辅节点转发的MCG失败信息消息,获取MCG失败信息消息的内容。
再例如,在SRB3场景下,终端设备可以将MCG失败信息消息封装在其他消息中,或者说将MCG失败信息消息包含在其他消息中的一个容器(container)中,发送给辅节点。可选地,终端设备将MCG失败信息消息封装在多无线双连接上行信息传输(ULInformationTransfer MRDC)消息中向辅节点发送,进而,辅节点可以在接收到该包含MCG失败信息消息的消息后,提取其中封装的MCG失败信息消息,再通过RRC传输消息将MCG失败信息消息发送给主节点,即在RRC传输消息中携带了MCG失败信息消息。MCG失败信息消息可以被封装在RRC传输消息中或者说包含在RRC传输消息的一个container中。
在一种可能的设计方案中,与步骤二中终端设备在第一时间段内向SCG发送信号的实现方式类似,图6所示出的通信方法还可以包括:终端设备在第一时间段内通过辅节点向主节点发送信号。相应地,主节点在第一时间段内通过辅节点从终端设备接收信号。也就是说,终端设备可以不必考虑MCG与SCG之间的时分复用的限制,即终端设备可以利用原本分别用于向MCG和SCG发送信号的所有时间段内,通过辅节点向主节点发送信号,以便尽快恢复MCG,从而进一步提高通信可靠性。
进一步地,在执行上述S602的过程中,终端设备向SCG发送信号(承载有第二指示信息)的发射功率也可以根据上述步骤二中的第一最大发射功率确定。关于第一最大发射功率的具体实现方式,可以参考上述步骤二,此处不再赘述。
S603,主节点通过辅节点向终端设备发送第一消息的响应消息。相应地,终端设备通过辅节点从主节点接收第一消息的响应消息。
其中,第一消息的响应消息可以是承载同步信息的RRC重配置(RRC reconfiguration)消息或RRC释放(RRC release)消息,也可以是其他消息。其中,RRC释放消息用于指示终端设备释放发生了链路问题的RRC连接以通知终端设备,网络侧无法恢复MCG。
上述同步信息用于指示终端设备恢复MCG,如指示终端设备执行切换流程或重配置流程以恢复MCG,即RRC重配置消息可以用于指示终端设备恢复MCG,从而进一步提高通信可靠性。可选地,RRC重配置消息还可以用于指示终端设备再次挂起SCG,以节省终端设备的功耗。
上述S603,主节点通过辅节点向终端设备发送第一消息的响应消息,可以包括:主节点可以通过主节点与辅节点之间的接口,如Xn接口或X2接口,向辅节点发送第一消息的响应消息。比如主节点通过Xn接口或X2接口传输的RRC传输消息向辅节 点发送第一消息的响应消息,也即RRC传输消息中携带了第一消息的响应消息。进而,辅节点通过空口将该第一消息的响应消息直接透传给终端设备或者包含在发送给终端设备的其他消息中。下面举例说明。
在一种可能的设计方案中,第一消息的响应消息可以为承载同步信息的RRC重配置消息或RRC释放消息。例如,在分流SRB1场景下,主节点可以通过主节点与辅节点之间的接口,如Xn接口或X2接口,向辅节点发送RRC传输消息,RRC传输消息中携带了承载同步信息的RRC重配置消息或RRC释放消息。相应地,辅节点通过辅节点与主节点之间的接口,如Xn接口或X2接口,从主节点接收携带了承载同步信息的RRC重配置消息或RRC释放消息,比如主节点通过Xn接口或X2接口中的RRC传输消息发送第一消息的响应消息,也即RRC传输消息中携带了第一消息的响应消息。然后,辅节点向终端设备发送这些从主节点接收的第一消息的响应消息。
在另一种可能的设计方案中,第一消息的响应消息也可以为封装有承载同步信息的RRC重配置消息或RRC释放消息的另一个消息发给终端设备,如多无线双连接下行信息传输(DLInformationTransferMRDC)消息。例如,在SRB3场景下,主节点将承载同步信息的RRC重配置消息或RRC释放消息通过主节点与辅节点之间的接口,如Xn接口或X2接口,向辅节点发送,比如主节点通过Xn接口或X2接口中的RRC传输消息发送第一消息的响应消息,也即RRC传输消息中携带了第一消息的响应消息。相应地,辅节点通过辅节点与主节点之间的接口,如Xn接口或X2接口,从主节点接收消息。辅节点可以将第一消息的响应消息封装在另一消息,如多无线双连接下行信息传输消息中向终端设备发送。
S604,终端设备与第一节点交互,以恢复MCG。
具体地,终端设备可以根据第一消息的响应消息与第一节点交互,从而恢复MCG。例如,终端设备可以根据第一消息的响应消息接入第一节点中的第一小区,并在接入成功后向第一节点中的第一小区发送RRC重配置完成消息(RRCReconfiguration Complete)。
在一种可能的设计方案中,第一节点可以是MN,第一小区可以是原主小区,即终端设备通过执行RRC重配置流程恢复MCG。可选地,第一小区也可以是MN中的另一小区,如MCG中的一个辅小区或位于MN但不属于MCG的另一小区,即终端设备通过执行站内切换流程恢复MCG。
在另一种可能的设计方案中,第一节点也可以是除MN之外的另一个节点,如SN或除MN和SN之外的另一个节点,第一小区可以为第一节点中的一个小区,即此时终端设备通过执行站间切换流程恢复MCG。
示例性地,可以恢复终端设备与MCG在分流SRB1和/或SRB3上的传输,即恢复信令传输。
可选地,还可以恢复终端设备与MCG中的一个或多个小区在DRB上的传输,即恢复数据传输。
进一步地,还可以恢复MCG与SCG之间的调度时机限制和/或发射功率限制,具体实现可以参考步骤一中的时分复用图样和方式1-方式3的相关内容,此处不再赘述。
或者,可选地,在MCG恢复之后,终端设备可以再次挂起SCG,以节省终端设 备的功耗。
进一步地,终端设备可以记录随机接入信息。其中,随机接入信息是指终端设备执行SCG恢复流程的过程中,终端设备发起的随机接入过程的信息。其中,随机接入过程可能包括多次接入尝试,相应地随机接入信息可以包括每次接入尝试的如下一项或多项信息:冲突指示信息(即指示是否与另一终端设备向SCG发起的随机接入过程冲突)、发送的随机接入前缀(random access preamble)的标识、用于发送该随机接入前缀的同步信号块(synchronization signal block,SSB)的配置信息、该随机接入前缀的发送次数、接入指示信息等。其中,冲突指示用于指示该终端设备向SCG发起的随机接入过程是否与另一终端设备向SCG发起的随机接入过程冲突,接入指示信息用于指示该随机接入信息是在恢复SCG的过程中,执行随机接入过程时记录的。
需要说明的是,如果在恢复SCG后的指定时间段内没有发生MCG RLF,则终端设备可以指示SCG自动回落到挂起状态,如终端设备的RRC层实体可以向终端设备的PDCP层实体发送一指示信息,该第一指示信息用于指示挂起SCG。其中,在该指定时间段内,终端设备可以不发送数据,即恢复SCG只是为MCG恢复做准备。例如,当在上述S601中,终端设备检测到MCG的信号质量低于第一信号质量阈值时,终端设备确定挂起的SCG中的待恢复小区。倘若在恢复SCG之后,如成功执行上述S601之后的指定时间段内,MCG的信号质量没有进一步恶化到发生MCG RLF的程度,则终端设备可以再次挂起SCG,以节省终端设备的功耗。其中,指定时间段的取值可以根据实际的通信需求确定,本申请实施例对于指定时间段的取值和具体实现方式,不做任何限定。
基于上述方法实施例所述的通信方法,当终端设备检测到MCG发生链路问题,或MCG的信号质量变差时,也就是当终端设备获知与主节点在MCG上的通信质量变差时,终端设备可以恢复挂起的SCG,以恢复终端设备与辅节点在SCG上的通信,从而提高终端设备的通信可靠性。
以上结合图6-图7详细说明了本申请实施例提供的通信方法。以下结合图8详细说明本申请实施例提供的另一种通信装置。
示例性地,图8是本申请实施例提供的通信装置的结构示意图二。该通信装置可以是图1中所示出的终端设备或辅节点或主节点或图5中所示出的通信装置500,或者为可设置于图1中所示出的终端设备或辅节点或主节点或图5中所示出的通信装置500的芯片(***)或其他部件。本申请实施例对此不做具体限定。
如图8所示,通信装置800包括:处理模块801和收发模块802。为了便于说明,图8仅示出了通信装置800的主要部件。
在一种可能的设计方案中,通信装置800可适用于图1所示出的通信***中,执行图6所示的通信方法中终端设备的功能。下面具体说明。
其中,处理模块801,用于当控制收发模块802检测到主小区组MCG发生链路问题,或MCG的信号质量低于信号质量阈值时,恢复挂起的辅小区组SCG。其中,MCG由主节点管理,SCG由辅节点管理。
在一种可能的设计方案中,处理模块801,还用于恢复与SCG在分流信令无线承载SRB1和/或信令无线承载SRB3上的传输。
示例性地,处理模块801可以包括无线资源控制RRC层实体和分组数据汇聚协议PDCP层实体。可选地,RRC层实体,用于向PDCP层实体发送第一指示信息。其中,第一指示信息用于指示恢复SCG。
进一步地,收发模块802,还用于通过辅节点向主节点发送第二指示信息。其中,第二指示信息用于指示MCG发生的链路问题或指示MCG发生了链路问题。
可选地,收发模块802,还用于在辅节点接受通信装置800发起的随机接入请求之后,通过辅节点向主节点发送第二指示信息。
示例性地,第二指示信息可以包括在第一消息中传输。其中,第一消息可以为MCG失败消息,或包括MCG失败消息的另一消息。
可选地,收发模块802,还用于通过辅节点从主节点接收第一消息的响应消息。其中,第一消息的响应消息可以为RRC重配置消息或者RRC释放消息。可选地,RRC重配置消息可以用于指示终端设备挂起SCG。
在一种可能的设计方案中,处理模块801,还用于在检测到MCG发生链路问题,或MCG的信号质量低于信号质量阈值之后,确定通信装置800向SCG发送信号的最大发射功率为第一最大发射功率。其中,第一最大发射功率大于第二最大发射功率,第二最大发射功率为SCG被挂起前通信装置800向SCG发送信号的最大发射功率。
在另一种可能的设计方案中,收发模块802,还用于在第一时间段内向SCG发送信号。其中,第一时间段包括根据MCG与SCG之间的时分复用图样,通信装置800向MCG发送信号的时间段和通信装置800向SCG发送信号的时间段。
可选地,收发模块802,还用于从第一时刻开始,向SCG发送信号。其中,第一时刻为第一时间段内的多个发送时刻中最早的发送时刻。
需要说明的是,上述第一最大发射功率方案和第一时间段方案可以独立实施,也可以结合实施。例如,收发模块802可以第一最大发射功率,在第一时间段内的多个发送时刻向SCG发送信号。其中,第一时间段内的多个发送时刻可以包括上述第一时刻。
在另一种可能的设计方案中,通信装置800也可适用于图1所示出的通信***中,执行图6所示的通信方法中辅节点的功能。其中,辅节点用于管理SCG。
其中,处理模块801,用于控制收发模块802与终端设备交互,以恢复终端设备已被挂起的辅小区组SCG。
在一种可能的设计方案中,处理模块801,还用于恢复终端设备与SCG在分流信令无线承载SRB1和/或信令无线承载SRB3上的传输。
可选地,收发模块802,还用于接受终端设备发起的随机接入请求。其中,随机接入请求用于恢复SCG。
在一种可能的设计方案中,收发模块802,还用于从终端设备接收第二指示信息,并向主节点发送第二指示信息。其中,主节点用于管理终端设备的主小区组MCG,第二指示信息用于指示MCG发生的链路问题或指示MCG发生了链路问题。
可选地,第二指示信息可以包括在第一消息中发送。其中,第一消息可以为MCG失败消息,或包括MCG失败消息的另一消息。
进一步地,收发模块802,还用于从主节点接收第一消息的响应消息,并向终端 设备发送第一消息的响应消息。其中,第一消息的响应消息可以为RRC重配置消息或者RRC释放消息,RRC重配置消息用于指示终端设备恢复MCG,RRC释放消息用于指示终端设备RRC连接。可选地,RRC重配置消息还可以用于指示终端设备挂起SCG。
在一种可能的设计方案中,收发模块802,还用于在第一时间段内从终端设备接收信号。其中,第一时间段包括根据MCG与SCG之间的时分复用图样,终端设备向MCG发送信号的时间段和终端设备向SCG发送信号的时间段。
可选地,收发模块802,还用于从第一时刻开始,从终端设备接收信号。其中,第一时刻为第一时间段内的多个发送时刻中最早的发送时刻。
在又一种可能的设计方案中,通信装置800也可适用于图1所示出的通信***中,执行图6所示的通信方法中主节点的功能。其中,主节点用于管理MCG。
其中,收发模块802,用于通过辅节点从终端设备接收第二指示信息。其中,辅节点用于管理辅小区组SCG,第二指示信息用于指示MCG发生的链路问题或指示MCG发生了链路问题。
处理模块801,用于恢复MCG。
可选地,第二指示信息可以包括在第一消息中传输。其中,第一消息可以为MCG失败消息,或包括MCG失败消息的另一消息,本申请实施例对此不做具体限定。
进一步地,收发模块802,还用于通过辅节点向终端设备发送第一消息的响应消息。其中,第一消息的响应消息为RRC重配置消息或者RRC释放消息,RRC重配置消息用于指示终端设备恢复MCG,RRC释放消息用于指示终端设备释放RRC连接。可选地,RRC重配置消息还可以用于指示终端设备挂起SCG。
在一种可能的设计方案中,收发模块802,还用于在第一时间段内通过辅节点从终端设备接收信号。其中,第一时间段包括根据MCG与SCG之间的时分复用图样,终端设备向MCG发送信号的时间段和终端设备向SCG发送信号的时间段。
可选地,图8所示的通信装置800还可以包括存储模块(图8中未示出),该存储模块存储有程序或指令。当处理模块801执行该程序或指令时,使得通信装置800可以执行图6所示的通信方法中终端设备或辅节点或主节点的功能。
此外,通信装置800的技术效果,可以分别参考图3所示的通信方法的技术效果,此处不再赘述。
本申请实施例提供一种通信装置。该通信装置用于执行上述方法实施例所述的通信方法。
本申请实施例提供一种通信装置。该通信装置包括:处理器。其中,处理器,用于执行上述方法实施例所述的通信方法。
本申请实施例提供一种芯片***。该芯片***包括处理器和输入/输出端口,所述处理器用于实现上述方法实施例所涉及的处理功能,所述输入/输出端口用于实现上述方法实施例所涉及的收发功能。
在一种可能的设计中,该芯片***还可以包括存储器,该存储器用于存储实现上述方法实施例所涉及的各项功能的程序指令和数据。
该芯片***,可以由芯片构成,也可以包含芯片和其他分立器件。
本申请实施例提供一种通信***。该***包括上述终端设备、辅节点和主节点, 具体可以参考图1中所示出的通信***实施例,此处不再赘述。
本申请实施例提供一种计算机可读存储介质,该计算机可读存储介质包括计算机程序或指令;当该计算机程序或指令在计算机上运行时,使得该计算机执行上述方法实施例所述的通信方法。
本申请实施例提供一种计算机程序产品,包括计算机程序或指令,当该计算机程序或指令在计算机上运行时,使得该计算机执行上述方法实施例所述的通信方法。
应理解,在本申请实施例中的处理器可以是中央处理单元(central processing unit,CPU),该处理器还可以是其他通用处理器、数字信号处理器(digital signal processor,DSP)、专用集成电路(application specific integrated circuit,ASIC)、现成可编程门阵列(field programmable gate array,FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
还应理解,本申请实施例中的存储器可以是易失性存储器或非易失性存储器,或可包括易失性和非易失性存储器两者。其中,非易失性存储器可以是只读存储器(read-only memory,ROM)、可编程只读存储器(programmable ROM,PROM)、可擦除可编程只读存储器(erasable PROM,EPROM)、电可擦除可编程只读存储器(electrically EPROM,EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory,RAM),其用作外部高速缓存。通过示例性但不是限制性说明,许多形式的随机存取存储器(random access memory,RAM)可用,例如静态随机存取存储器(static RAM,SRAM)、动态随机存取存储器(DRAM)、同步动态随机存取存储器(synchronous DRAM,SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM,DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM,ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM,SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM,DR RAM)。
上述实施例,可以全部或部分地通过软件、硬件(如电路)、固件或其他任意组合来实现。当使用软件实现时,上述实施例可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令或计算机程序。在计算机上加载或执行所述计算机指令或计算机程序时,全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以为通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中,或者从一个计算机可读存储介质向另一个计算机可读存储介质传输,例如,所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集合的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如,软盘、硬盘、磁带)、光介质(例如,DVD)、或者半导体介质。半导体介质可以是固态硬盘。
应理解,本文中术语“和/或”,仅仅是一种描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B这三种情况,其中A,B可以是单数或者复数。另外,本文中字符“/”,一般表示 前后关联对象是一种“或”的关系,但也可能表示的是一种“和/或”的关系,具体可参考前后文进行理解。
本申请中,“至少一个”是指一个或者多个,“多个”是指两个或两个以上。“以下至少一项(个)”或其类似表达,是指的这些项中的任意组合,包括单项(个)或复数项(个)的任意组合。例如,a,b,或c中的至少一项(个),可以表示:a,b,c,a-b,a-c,b-c,或a-b-c,其中a,b,c可以是单个,也可以是多个。
应理解,在本申请的各种实施例中,上述各过程的序号的大小并不意味着执行顺序的先后,各过程的执行顺序应以其功能和内在逻辑确定,而不应对本申请实施例的实施过程构成任何限定。
本领域普通技术人员可以意识到,结合本文中所公开的实施例描述的各示例的单元及算法步骤,能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行,取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到,为描述的方便和简洁,上述描述的***、装置和单元的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。
在本申请所提供的几个实施例中,应该理解到,所揭露的***、装置和方法,可以通过其它的方式实现。例如,以上所描述的装置实施例仅仅是示意性的,例如,所述单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个***,或一些特征可以忽略,或不执行。另一点,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口,装置或单元的间接耦合或通信连接,可以是电性,机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外,在本申请各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个计算机可读取存储介质中。基于这样的理解,本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、只读存储器(read-only memory,ROM)、随机存取存储器(random access memory,RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述,仅为本申请的具体实施方式,但本申请的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本申请揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本申请的保护范围之内。因此,本申请的保护范围应以所述权利要求的保 护范围为准。
Claims (52)
- 一种通信方法,其特征在于,包括:当检测到主小区组MCG发生链路问题,或所述MCG的信号质量低于信号质量阈值时,终端设备恢复挂起的辅小区组SCG;其中,所述MCG由主节点管理,所述SCG由辅节点管理。
- 根据权利要求1所述的通信方法,其特征在于,所述终端设备恢复挂起的辅小区组SCG,包括如下一项或多项:所述终端设备恢复与所述SCG在分流信令无线承载SRB1和/或信令无线承载SRB3上的传输;或者,所述终端设备激活所述SCG中已被去激活的部分或全部小区;或者,所述终端设备唤醒所述SCG中处于休眠状态的部分或全部小区;或者,所述终端设备停止在所述SCG中的部分或全部小区实施的不连续接收和/或不连续发送;或者,所述终端设备恢复在所述SCG中的信令传输;或者,所述终端设备恢复在所述SCG中的数据传输。
- 根据权利要求1或2所述的通信方法,其特征在于,所述终端设备包括无线资源控制RRC层实体和分组数据汇聚协议PDCP层实体;所述通信方法还包括:所述终端设备的无线资源控制RRC层实体向所述终端设备的分组数据汇聚协议PDCP层实体发送第一指示信息;其中,所述第一指示信息用于指示恢复所述SCG。
- 根据权利要求1-3中任一项所述的通信方法,其特征在于,所述通信方法还包括:所述终端设备通过所述辅节点向所述主节点发送第二指示信息;其中,所述第二指示信息用于指示所述MCG发生的链路问题或指示所述MCG发生了链路问题。
- 根据权利要求4所述的通信方法,其特征在于,所述通信方法还包括:在所述辅节点接受所述终端设备发起的随机接入请求之后,所述终端设备通过所述辅节点向所述主节点发送所述第二指示信息。
- 根据权利要求4或5所述的通信方法,其特征在于,所述第二指示信息包括在第一消息中。
- 根据权利要求6所述的通信方法,其特征在于,所述通信方法还包括:所述终端设备通过所述辅节点从所述主节点接收所述第一消息的响应消息;其中,所述第一消息的响应消息为RRC重配置消息或者RRC释放消息。
- 根据权利要求7所述的通信方法,其特征在于,所述RRC重配置消息用于指示所述终端设备挂起所述SCG。
- 根据权利要求1-8中任一项所述的通信方法,其特征在于,所述通信方法还包括:在检测到所述MCG发生链路问题,或所述MCG的信号质量低于信号质量阈值之后,所述终端设备向所述SCG发送信号的最大发射功率为第一最大发射功率;其中,所述第一最大发射功率大于第二最大发射功率,所述第二最大发射功率为 所述SCG被挂起前所述终端设备向所述SCG发送信号的最大发射功率。
- 根据权利要求1-9中任一项所述的通信方法,其特征在于,所述通信方法还包括:所述终端设备在第一时间段内向所述SCG发送信号;其中,所述第一时间段包括根据所述MCG与所述SCG之间的时分复用图样,所述终端设备向所述MCG发送信号的时间段和所述终端设备向所述SCG发送信号的时间段。
- 根据权利要求10所述的通信方法,其特征在于,所述终端设备在第一时间段内向所述SCG发送信号,包括:所述终端设备从第一时刻开始,向所述SCG发送信号;其中,所述第一时刻为所述第一时间段内的多个发送时刻中最早的发送时刻。
- 一种通信方法,其特征在于,所述方法包括:辅节点恢复终端设备已被挂起的辅小区组SCG;所述辅节点用于管理所述SCG;所述辅节点从所述终端设备接收第二指示信息,并向主节点发送所述第二指示信息;其中,所述主节点用于管理所述终端设备的主小区组MCG,所述第二指示信息用于指示所述MCG发生的链路问题或指示所述MCG发生了链路问题。
- 根据权利要求12所述的方法,其特征在于,所述辅节点恢复终端设备已被挂起的辅小区组SCG,包括如下一项或多项:所述辅节点恢复所述终端设备与所述SCG在分流信令无线承载SRB1和/或信令无线承载SRB3上的传输;或者,所述辅节点激活所述终端设备在所述SCG中已被去激活的部分或全部小区;或者,所述辅节点唤醒所述终端设备在所述SCG中处于休眠状态的部分或全部小区;或者,所述辅节点停止所述终端设备在所述SCG中的部分或全部小区实施的不连续接收和/或不连续发送;或者,所述辅节点恢复所述终端设备在所述SCG中的信令传输;或者,所述辅节点恢复所述终端设备在所述SCG中的数据传输。
- 根据权利要求12或13所述的方法,其特征在于,所述方法还包括:所述辅节点接受所述终端设备发起的随机接入请求。
- 根据权利要求12所述的通信方法,其特征在于,所述第二指示信息包括在第一消息中。
- 根据权利要求15所述的通信方法,其特征在于,所述方法还包括:所述辅节点从所述主节点接收所述第一消息的响应消息,并向所述终端设备发送所述第一消息的响应消息;其中,所述第一消息的响应消息为RRC重配置消息或RRC释放消息。
- 根据权利要求16所述的通信方法,其特征在于,所述RRC重配置消息用于指示所述终端设备挂起所述SCG。
- 根据权利要求12-17中任一项所述的通信方法,其特征在于,所述通信方法还包括:所述辅节点在第一时间段内从所述终端设备接收信号;其中,所述第一时间段包括根据所述MCG与所述SCG之间的时分复用图样,所述终端设备向所述MCG发送信号的时间段和所述终端设备向所述SCG发送信号的时间段。
- 根据权利要求18所述的通信方法,其特征在于,所述辅节点在第一时间段内从所述终端设备接收信号,包括:所述辅节点从第一时刻开始,从所述终端设备接收信号;其中,所述第一时刻为所述第一时间段内的多个发送时刻中最早的发送时刻。
- 一种通信方法,其特征在于,终端设备的辅小区组SCG已被挂起,所述方法包括:主节点通过辅节点从终端设备接收第二指示信息;其中,所述主节点用于管理主小区组MCG,所述辅节点用于管理所述SCG,所述第二指示信息用于指示所述MCG发生的链路问题或指示所述MCG发生了链路问题;所述主节点恢复MCG。
- 根据权利要求20所述的通信方法,其特征在于,所述第二指示信息包括在第一消息中。
- 根据权利要求21所述的通信方法,其特征在于,所述方法还包括:所述主节点通过所述辅节点向所述终端设备发送所述第一消息的响应消息;其中,所述第一消息的响应消息为RRC重配置消息或RRC释放消息。
- 根据权利要求22所述的通信方法,其特征在于,所述RRC重配置消息用于指示所述终端设备挂起所述SCG。
- 根据权利要求20-23中任一项所述的通信方法,其特征在于,所述通信方法还包括:所述主节点在第一时间段内通过所述辅节点从所述终端设备接收信号;其中,所述第一时间段包括根据所述MCG与所述SCG之间的时分复用图样,所述终端设备向所述MCG发送信号的时间段和所述终端设备向所述SCG发送信号的时间段。
- 一种通信装置,其特征在于,包括:处理模块和收发模块;其中,所述处理模块,用于当控制所述收发模块检测到主小区组MCG发生链路问题,或所述MCG的信号质量低于信号质量阈值时,恢复挂起的辅小区组SCG;其中,所述MCG由主节点管理,所述SCG由辅节点管理。
- 根据权利要求25所述的通信装置,其特征在于,所述处理模块,还用于恢复与所述SCG在分流信令无线承载SRB1和/或信令无线承载SRB3上的传输;或者,所述处理模块,还用于激活所述SCG中已被去激活的部分或全部小区;或者,所述处理模块,还用于唤醒所述SCG中处于休眠状态的部分或全部小区;或者,所述处理模块,还用于停止在所述SCG中的部分或全部小区实施的不连续接收和/或不连续发送;或者,所述处理模块,还用于恢复在所述SCG中的信令传输;或者,所述处理模块,还用于恢复在所述SCG中的数据传输。
- 根据权利要求25或26所述的通信装置,其特征在于,所述处理模块包括无线资源控制RRC层实体和分组数据汇聚协议PDCP层实体;所述RRC层实体向所述PDCP层实体发送第一指示信息;其中,所述第一指示信息用于指示恢复所述SCG。
- 根据权利要求25-27中任一项所述的通信装置,其特征在于,所述收发模块,还用于通过所述辅节点向所述主节点发送第二指示信息;其中,所述第二指示信息用于指示所述MCG发生的链路问题或指示所述MCG发生了链路问题。
- 根据权利要求28所述的通信装置,其特征在于,所述收发模块,还用于在所述辅节点接受所述通信装置发起的随机接入请求之后,通过所述辅节点向所述主节点发送所述第二指示信息。
- 根据权利要求28或29所述的通信装置,其特征在于,所述第二指示信息包括在第一消息中。
- 根据权利要求30所述的通信装置,其特征在于,所述收发模块,还用于通过所述辅节点从所述主节点接收所述第一消息的响应消息;其中,所述第一消息的响应消息为RRC重配置消息或者RRC释放消息。
- 根据权利要求31所述的通信装置,其特征在于,所述RRC重配置消息用于指示所述通信装置挂起所述SCG。
- 根据权利要求25-32中任一项所述的通信装置,其特征在于,所述处理模块,还用于确定在检测到所述MCG发生链路问题,或所述MCG的信号质量低于信号质量阈值之后,所述通信装置向所述SCG发送信号的最大发射功率为第一最大发射功率;其中,所述第一最大发射功率大于第二最大发射功率,所述第二最大发射功率为所述SCG被挂起前所述通信装置向所述SCG发送信号的最大发射功率。
- 根据权利要求25-33中任一项所述的通信装置,其特征在于,所述收发模块,还用于在第一时间段内向所述SCG发送信号;其中,所述第一时间段包括根据所述MCG与所述SCG之间的时分复用图样,所述通信装置向所述MCG发送信号的时间段和所述通信装置向所述SCG发送信号的时间段。
- 根据权利要求34所述的通信装置,其特征在于,所述收发模块,还用于从第一时刻开始,向所述SCG发送信号;其中,所述第一时刻为所述第一时间段内的多个发送时刻中最早的发送时刻。
- 一种通信装置,其特征在于,用于管理辅小区组SCG,所述装置包括:处理模块和收发模块;其中,所述处理模块,用于控制所述收发模块与终端设备交互,以恢复所述终端设备已被挂起的SCG;所述收发模块,用于从所述终端设备接收第二指示信息,并向主节点发送所述第二指示信息;其中,所述主节点用于管理所述终端设备的主小区组MCG,所述第二指示信息用于指示所述MCG发生的链路问题或指示所述MCG发生了链路问题。
- 根据权利要求36所述的装置,其特征在于,所述处理模块,还用于恢复所述 终端设备与所述SCG在分流信令无线承载SRB1和/或信令无线承载SRB3上的传输;或者,所述处理模块,还用于激活所述终端设备在所述SCG中已被去激活的部分或全部小区;或者,所述处理模块,还用于唤醒所述终端设备在所述SCG中处于休眠状态的部分或全部小区;或者,所述处理模块,还用于停止所述终端设备在所述SCG中的部分或全部小区实施的不连续接收和/或不连续发送;或者,所述处理模块,还用于恢复所述终端设备在所述SCG中的信令传输;或者,所述处理模块,还用于恢复所述终端设备在所述SCG中的数据传输。
- 根据权利要求36或37所述的装置,其特征在于,所述收发模块,还用于接受所述终端设备发起的随机接入请求。
- 根据权利要求36所述的装置,其特征在于,所述第二指示信息包括在第一消息中。
- 根据权利要求39所述的装置,其特征在于,所述收发模块,还用于从所述主节点接收所述第一消息的响应消息,并向所述终端设备发送所述第一消息的响应消息;其中,所述第一消息的响应消息为RRC重配置消息或RRC释放消息。
- 根据权利要求40所述的装置,其特征在于,所述RRC重配置消息用于指示所述终端设备挂起所述SCG。
- 根据权利要求36-41中任一项所述的装置,其特征在于,所述收发模块,还用于在第一时间段内从所述终端设备接收信号;其中,所述第一时间段包括根据所述MCG与所述SCG之间的时分复用图样,所述终端设备向所述MCG发送信号的时间段和所述终端设备向所述SCG发送信号的时间段。
- 根据权利要求42所述的装置,其特征在于,所述收发模块,还用于从第一时刻开始,从所述终端设备接收信号;其中,所述第一时刻为所述第一时间段内的多个发送时刻中最早的发送时刻。
- 一种通信装置,其特征在于,用于管理主小区组MCG,所述装置包括:处理模块和收发模块;其中,终端设备的辅小区组SCG已被挂起,所述收发模块,用于通过辅节点从终端设备接收第二指示信息;其中,所述辅节点用于管理所述SCG,所述第二指示信息用于指示所述MCG发生的链路问题或指示所述MCG发生了链路问题;所述处理模块,用于恢复MCG。
- 根据权利要求44所述的装置,其特征在于,所述第二指示信息包括在第一消息中。
- 根据权利要求45所述的装置,其特征在于,所述收发模块,还用于通过所述辅节点向所述终端设备发送所述第一消息的响应消息;其中,所述第一消息的响应消息为RRC重配置消息或RRC释放消息。
- 根据权利要求46所述的装置,其特征在于,所述RRC重配置消息用于指示 所述终端设备挂起所述SCG。
- 根据权利要求44-47中任一项所述的装置,其特征在于,所述收发模块,还用于在第一时间段内通过所述辅节点从所述终端设备接收信号;其中,所述第一时间段包括根据所述MCG与所述SCG之间的时分复用图样,所述终端设备向所述MCG发送信号的时间段和所述终端设备向所述SCG发送信号的时间段。
- 一种通信***,其特征在于,包括辅节点和主节点,所述主节点用于管理主小区组MCG,所述辅节点用于管理辅小区组SCG,其中,所述辅节点用于执行如权利要求12-19任一所述的方法,所述主节点用于执行如权利要求20-24任一所述的方法。
- 根据权利要求49所述的通信***,其特征在于,还包括终端设备,所述终端设备用于执行如权利要求1-11任一所述的方法。
- 一种通信装置,其特征在于,所述通信装置包括:处理器,所述处理器与存储器耦合;所述存储器,用于存储计算机程序;所述处理器,用于执行所述存储器中存储的所述计算机程序,以使得所述通信装置执行如权利要求1-24中任一项所述的通信方法。
- 一种计算机可读存储介质,其特征在于,所述计算机可读存储介质包括计算机程序或指令,当所述计算机程序或指令在计算机上运行时,使得所述计算机执行如权利要求1-24中任一项所述的通信方法。
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LENOVO, MOTOROLA MOBILITY: "General issues on SCG activation and deactivation", 3GPP DRAFT; R2-2101121, vol. RAN WG2, 15 January 2021 (2021-01-15), pages 1 - 5, XP051974118 * |
LENOVO, MOTOROLA MOBILITY: "On SCG deactivation and activation", 3GPP DRAFT; R2-2009867, vol. RAN WG2, 23 October 2020 (2020-10-23), pages 1 - 3, XP051942669 * |
See also references of EP4096341A4 |
Also Published As
Publication number | Publication date |
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EP4096341A1 (en) | 2022-11-30 |
EP4096341A4 (en) | 2023-08-02 |
US20220394620A1 (en) | 2022-12-08 |
CN113301611A (zh) | 2021-08-24 |
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