WO2022256982A1 - 一种辅助主小区的条件变更方法和装置 - Google Patents
一种辅助主小区的条件变更方法和装置 Download PDFInfo
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Definitions
- the embodiments of the present application relate to the communication field, and in particular to a method and device for changing conditions of an auxiliary primary cell.
- wireless communication networks are widely deployed in daily life to provide diversified communication services, such as voice, video, packet data, messaging, broadcasting, and so on.
- wireless access technologies and wireless communication networks can develop in a variety of ways, and will coexist and complement each other for a long period of time.
- a variety of service networks and wireless access technologies suitable for different wireless application scenarios constitute a multi-standard communication network with seamless coverage and good service experience. In this way, users are in an environment covered by a multi-standard communication network.
- Dual-Connectivity (DC) technology is introduced to support terminals to connect to two cells at the same time, increasing the throughput of a single user. quantity.
- the two cells respectively correspond to a master cell group (Master Cell group, MCG) and a secondary cell group (Secondary Cell group, SCG), wherein the cell group where the cell where the terminal first initiates random access is located is the primary cell group.
- MCG Master Cell group
- SCG Secondary Cell group
- conditional handover technology is introduced to enable the terminal's reporting capability to support the conditional handover. That is, when the terminal receives the conditional handover configuration issued by the base station corresponding to the candidate cell, the terminal does not immediately execute the handover action, but continues to measure and evaluate the candidate cell, and selects the corresponding cell for random access when the handover condition is met.
- conditional handover process of the MCG it is generally called Conditional Handover (CHO); for the SCG, it is generally called Conditional PSCell Change (CPC).
- the execution process of the conditional auxiliary primary cell change includes random access, and the random access process takes a long time, and because the air interface messages are issued in sequence, there are terminals After the secondary primary cell is handed over, the configuration information of the source cell is still received. This may lead to wrong superposition of configuration information on the terminal side, and then the terminal rebuilds the MCG, affecting service continuity. Therefore, it is necessary to study and improve a conditional auxiliary primary cell change method to avoid unnecessary MCG reconstruction and improve user communication experience.
- the embodiment of the present application provides a method and device for changing conditions of an auxiliary primary cell, so as to avoid unnecessary MCG reconstruction caused by incorrect use of configuration information when the CPC process conflicts with the radio link connection RRC configuration message issued by the base station , so as to ensure the user's service quality and communication experience.
- the embodiment of the present application provides a wireless communication method, and the method may be executed by a wireless communication device.
- the method includes: receiving a first radio link control RRC connection reconfiguration message, the first RRC connection reconfiguration message carrying the synchronization information of the candidate auxiliary primary cell and the trigger condition information of the conditional auxiliary primary cell changing CPC; sending the first RRC A reconfiguration complete message, the first RRC reconfiguration complete message is used to respond to the first RRC connection reconfiguration message; during the process of performing conditional assisted primary cell change, receiving a second RRC connection reconfiguration message from the primary cell,
- the second RRC connection reconfiguration message carries cell configuration information; sends a second RRC reconfiguration complete message to the primary cell, and the second RRC reconfiguration complete message is used to respond to the second RRC connection reconfiguration message; Initiate a random access procedure to the target primary secondary cell when the cell configuration information carried in the second RRC connection reconfiguration message includes synchronization information of the target secondary primary cell.
- the terminal interrupts the ongoing CPC process and responds preferentially to the second RRC connection reconfiguration message carrying the configuration information of the target auxiliary primary cell, so as to avoid the failure of the primary cell caused by not responding to the second RRC connection reconfiguration message.
- Group re-establishment, or simply superimposing the configuration information carried in the second RRC connection reconfiguration message may result in failure to maintain configuration parameters, cell group re-establishment and service interruption.
- the terminal when the cell configuration information carried in the second RRC connection reconfiguration message does not include the synchronization information of the target secondary primary cell, the terminal sends a secondary cell group failure information message to the primary cell.
- the terminal interrupts the ongoing CPC process, and when it judges that the RRC connection reconfiguration message does not carry the synchronization information of the target secondary primary cell, it actively initiates the secondary cell group failure process and requires the network to perform cell assignment and reconstruction for the terminal.
- the secondary cell group prevents the re-establishment of the cell group caused by the release of the terminal context by the network.
- the terminal receives the second RRC connection reconfiguration message from the primary cell during the execution condition assisted primary cell change process, including: sending the third RRC reconfiguration message to the primary cell Before the completion message, the second RRC connection reconfiguration message is received, and the third RRC reconfiguration complete message is used to indicate the end of the conditional assisted primary cell change procedure.
- the terminal receiving the second RRC connection reconfiguration message from the primary cell during the execution of the conditional assisted primary cell change process includes: sending to the primary cell
- the second RRC connection reconfiguration message is received within the first time period after the third RRC reconfiguration complete message.
- the first duration is shorter than the time it takes for the primary cell to receive the RRC reconfiguration complete message and issue a new RRC configuration, and may be a fixed value. In a possible implementation manner, its value ranges from 30 to 50 milliseconds.
- the terminal interrupts the ongoing CPC process, responds to the received second RRC connection reconfiguration message, and when judging that the message does not carry the synchronization information of the target secondary primary cell, actively triggers the secondary cell group failure process. Avoid the main cell group re-establishment and service interruption caused by the terminal not responding to the message.
- the terminal may also inform the network that the establishment of the secondary cell group has failed through the message of failure to establish the secondary cell group, and requires the network to participate in the reconstruction of the secondary cell group to help realize the access of a new primary secondary cell.
- the embodiment of the present application provides another wireless communication method, which can be performed by a wireless communication device.
- the method includes: receiving a first RRC connection reconfiguration message, the message carrying the synchronization information of the candidate secondary primary cell and the triggering condition information of the conditional secondary primary cell change; sending the first RRC reconfiguration complete message, the message is used to respond to the aforementioned first An RRC connection reconfiguration message; before executing the CPC process, send a CPC execution notification message to inform the network terminal to start the CPC process; receive a CPC execution response message to respond to the CPC execution notification message; after receiving the CPC execution response message , start the CPC process.
- the terminal informs the network of the operation of the terminal before starting the CPC process, so that the network can suspend the modification of the RRC connection configuration information of the terminal, thereby preventing the terminal from receiving the RRC connection configuration message during the CPC process, causing parameter conflicts .
- the method can prevent parameter conflicts from occurring, so that there is no risk of cell group re-establishment and business interruption.
- the embodiment of the present application provides another wireless communication method, and the method may be executed by a wireless communication device.
- the method includes: sending a first RRC connection reconfiguration message, the message carrying the synchronization information of the candidate secondary primary cell and the trigger condition information of the conditional primary secondary cell change; receiving the first RRC reconfiguration complete message, the message is used to respond to the aforementioned An RRC connection reconfiguration message; receive a CPC execution notification message, which is used to learn that the terminal starts to start the CPC process; send a CPC execution response message, which is used to respond to the CPC execution notification message; receive a second RRC reconfiguration completion message, which is used to indicate The CPC process is completed; during this period, no other RRC connection reconfiguration messages are sent, which are used to change the terminal.
- the network learns about the handover behavior of the terminal before the terminal starts the CPC process, and stops sending other RRC connection reconfiguration messages to change the RRC connection configuration information of the terminal. By locking the RRC connection configuration information unchanged, it is avoided that the terminal fails to save the parameters due to the inappropriate timing of sending the RRC connection reconfiguration message, and rebuilds the cell group.
- the embodiment of the present application provides another wireless communication method, and the method may be performed by a wireless communication device.
- the method includes: receiving a first RRC connection reconfiguration message, the message carrying the synchronization information of the candidate secondary primary cell and the triggering condition information of the conditional secondary primary cell change; sending the first RRC reconfiguration complete message, the message is used to respond to the aforementioned first An RRC connection reconfiguration message; in the process of performing CPC, receiving a second RRC connection reconfiguration message from the primary cell, the second RRC connection reconfiguration message carrying cell configuration information; sending a second RRC reconfiguration complete message, This message is used to respond to the aforementioned second RRC connection reconfiguration message; perform synchronous access to the target auxiliary primary cell; send an RRC reconfiguration complete message to the primary cell, and the message is used to indicate that the configuration of the cell group whose parameters are successfully superimposed is completed; receive An RRC connection reconfiguration message from the primary cell, which is used to indicate the operation of the cell group whose parameter superposition fails.
- the terminal adds a protocol channel so that the RRC reconfiguration complete message can carry a field, and the field is used to indicate that the configuration of the cell group whose parameters are successfully superimposed is completed.
- the terminal can inform the network that a parameter conflict has occurred in the terminal, and waits for the participation of the network to solve the problem.
- the embodiment of the present application provides another wireless communication method, and the method may be executed by a wireless communication device.
- the method includes: sending a first RRC connection reconfiguration message, the message carrying the synchronization information of the candidate secondary primary cell and the trigger condition information of the conditional primary secondary cell change; receiving the first RRC reconfiguration complete message, the message is used to respond to the aforementioned An RRC connection reconfiguration message; during the process of the terminal executing CPC, sending a second RRC connection reconfiguration message from the primary cell, the second RRC connection reconfiguration message carrying cell configuration information; receiving the second RRC reconfiguration complete message , the message is used to respond to the aforementioned second RRC connection reconfiguration message; after the terminal accesses the target auxiliary primary cell, a third RRC reconfiguration completion message is received, and the message is used to indicate that the configuration of the cell group whose parameters are successfully superimposed by the terminal is completed; An RRC connection reconfiguration message is sent, and the message is used to instruct the terminal to operate on the cell group whose parameter superposition fails
- the protocol path is used to indicate that the configuration of the cell group whose parameters are successfully superimposed on the terminal side is completed, so that the network can learn that the terminal has a cell group A parameter overlay failure occurred.
- the network can instruct the terminal to release and rebuild the cell whose parameter superposition fails, so as to speed up the rebuilding speed of the terminal cell group and speed up the service recovery.
- an embodiment of the present application provides a wireless communication device, including a processing unit and a transceiver unit, wherein the processing unit is used to control the transceiver unit to implement the methods of the first to fifth aspects or any of them A possible implementation method.
- the embodiment of the present application provides a wireless communication device, and the device may be a terminal, a base station, or a chip for the terminal or the base station.
- the device has the function of implementing the above-mentioned methods in the first to fifth aspects or any possible implementation method thereof. This function may be implemented by hardware, or may be implemented by executing corresponding software on the hardware.
- the hardware or software includes one or more modules corresponding to the above functions.
- the embodiment of the present application provides a wireless communication device, including a processor and a memory.
- a transceiver is also included.
- the memory is used to store computer programs or instructions
- the processor is used to call and run the computer programs or instructions from the memory.
- the wireless communication device executes the above-mentioned first aspect to Any implementation of any wireless communication method in the fifth aspect.
- processors there are one or more processors, and one or more memories.
- the memory may be integrated with the processor, or the memory may be separated from the processor.
- memory can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory.
- a system in a ninth aspect, includes the foregoing wireless communication device and network equipment.
- a computer program product includes: a computer program (also referred to as code, or an instruction), which, when the computer program is executed, causes the computer to perform any of the above-mentioned first to fifth aspects.
- a computer program also referred to as code, or an instruction
- a computer-readable storage medium stores a computer program (also referred to as code, or an instruction) when it is run on a computer, so that the computer executes the above-mentioned first aspect to the first aspect.
- the method in any possible implementation manner in any of the five aspects, or causing a computer to execute the method in any implementation manner in the first aspect to the fifth aspect above.
- a chip system may include a processor.
- the processor is coupled with the memory, and may be used to execute any one of the first aspect to the fifth aspect, and the method in any possible implementation manner of any one of the first to fifth aspects.
- the chip system further includes a memory.
- Memory used to store computer programs (also called code, or instructions).
- a processor configured to call and run a computer program from a memory, so that the device installed with the system-on-a-chip executes any one of the first to fifth aspects, and any possible one of any one of the first to fifth aspects method in the implementation.
- a wireless communication device including: an interface circuit and a processing circuit.
- Interface circuitry may include input circuitry and output circuitry.
- the processing circuit is used to receive signals through the input circuit and transmit signals through the output circuit, so that any one of the first aspect to the fifth aspect, and the method in any possible implementation manner of the first aspect to the fifth aspect are realized.
- the wireless communication device may be a chip
- the input circuit may be an input pin
- the output circuit may be an output pin
- the processing circuit may be a transistor, a gate circuit, a flip-flop, and various logic circuits.
- the input signal received by the input circuit may be received and input by, for example but not limited to, the receiver
- the output signal of the output circuit may be, for example but not limited to, output to the transmitter and transmitted by the transmitter
- the circuit may be the same circuit, which is used as an input circuit and an output circuit respectively at different times.
- the embodiment of the present application does not limit the specific implementation manners of the processor and various circuits.
- the wireless communication device may be a wireless communication device, that is, a computer device supporting a wireless communication function.
- the wireless communication device may be a terminal such as a smart phone, or a wireless access network device such as a base station.
- a system chip can also be called a system on chip (system on chip, SoC), or simply a SoC chip.
- Communication chips may include baseband processing chips and radio frequency processing chips. Baseband processing chips are also sometimes referred to as modems or baseband chips.
- RF processing chips are sometimes also referred to as RF transceivers or RF chips. In physical implementation, part or all of the chips in the communication chip can be integrated inside the SoC chip.
- the baseband processing chip is integrated in the SoC chip, and the radio frequency processing chip is not integrated with the SoC chip.
- the interface circuit may be a radio frequency processing chip in the wireless communication device, and the processing circuit may be a baseband processing chip in the wireless communication device.
- the wireless communication device may be a part of a wireless communication device, such as an integrated circuit product such as a system chip or a communication chip.
- the interface circuit may be an input/output interface, interface circuit, output circuit, input circuit, pin or related circuit on the chip or chip system.
- a processor may also be embodied as processing circuitry or logic circuitry.
- FIG. 1 is a schematic structural diagram of a wireless communication system provided by an embodiment of the present application.
- FIG. 2 is a schematic diagram of a dual connection scenario provided by an embodiment of the present application.
- FIG. 3 is a schematic diagram of a simplified conditional switching process provided by an embodiment of the present application.
- FIG. 4 is a schematic diagram of a conditional assisted primary cell change process triggered by a secondary node provided in an embodiment of the present application
- FIG. 5 is a schematic flow diagram of a conditional assisted primary cell change process provided by the embodiment of the present application.
- FIG. 6 is a schematic flow diagram of another conditional assisted primary cell change process provided by the embodiment of the present application.
- FIG. 7 is a schematic flow diagram of another conditional assisted primary cell change process provided by the embodiment of the present application.
- FIG. 8 is a schematic flow diagram of another conditional assisted primary cell change process provided by the embodiment of the present application.
- FIG. 9 is a schematic flow diagram of another conditional assisted primary cell change process provided by the embodiment of the present application.
- FIG. 10 is a schematic block diagram of a wireless communication device provided by an embodiment of the present application.
- FIG. 11 is a schematic structural diagram of a wireless communication device provided by an embodiment of the present application.
- devices can be divided into devices that provide wireless network services and devices that use wireless network services.
- Devices that provide wireless network services refer to those devices that make up a wireless communication network, which can be referred to as network equipment or network elements for short.
- Network equipment is usually owned by operators (such as China Mobile and Vodafone) or infrastructure providers (such as tower companies), and these manufacturers are responsible for operation or maintenance.
- Network equipment can be further divided into radio access network (radio access network, RAN) equipment and core network (core network, CN) equipment.
- RAN radio access network
- core network core network
- Typical RAN equipment includes a base station (base station, BS).
- the base station may also be called a wireless access point (access point, AP), or a transmission reception point (transmission reception point, TRP).
- the base station can be a general node B (generation Node B, gNB) in a 5G new radio (new radio, NR) system, or an evolved node B (evolutional Node B, eNB) in a 4G long term evolution (long term evolution, LTE) system. ).
- Devices using wireless network services are usually located at the edge of the network, and may be referred to as terminals for short.
- the terminal can establish a connection with the network equipment, and provide users with specific wireless communication services based on the services of the network equipment.
- user equipment user equipment
- subscriber unit subscriber unit
- SU subscriber unit
- the terminal compared with the base station usually placed in a fixed location, the terminal often moves with the user, and is sometimes called a mobile station (mobile station, MS).
- some network devices such as a relay node (relay node, RN) or a wireless router, etc., can sometimes be considered as terminals because they have a UE identity or belong to a user.
- the terminal can be a mobile phone (mobile phone), a tablet computer (tablet computer), a laptop computer (laptop computer), a wearable device (such as a smart watch, a smart bracelet, a smart helmet, smart glasses), and other Devices with wireless access capabilities, such as smart cars, various Internet of things (IOT) devices, including various smart home devices (such as smart meters and smart home appliances) and smart city devices (such as security or monitoring equipment, Intelligent road traffic facilities), etc.
- IOT Internet of things
- smart home devices such as smart meters and smart home appliances
- smart city devices such as security or monitoring equipment, Intelligent road traffic facilities
- FIG. 1 is a schematic structural diagram of a wireless communication system provided by an embodiment of the present application.
- a wireless communication system includes a terminal and a base station. According to different transmission directions, the transmission link from the terminal to the base station is marked as uplink (uplink, UL), and the transmission link from the base station to the terminal is marked as downlink (downlink, DL).
- uplink uplink
- downlink downlink
- data transmission in the uplink may be abbreviated as uplink data transmission or uplink transmission
- data transmission in the downlink may be abbreviated as downlink data transmission or downlink transmission.
- the base station can provide communication coverage for a specific geographical area through an integrated or external antenna device.
- One or more terminals within the communication coverage of the base station can access the base station.
- One base station can manage one or more cells.
- Each cell has an identification (identification), which is also called a cell identity (cell ID). From the perspective of radio resources, a cell is a combination of downlink radio resources and its paired uplink radio resources (not necessary).
- the wireless communication system can comply with the wireless communication standard of 3GPP, and can also comply with other wireless communication standards, such as the 802 series (such as 802.11, 802.15, or 802.20) of the Institute of Electrical and Electronics Engineers (Institute of Electrical and Electronics Engineers, IEEE). wireless communication standards. Although only one base station and one terminal are shown in FIG. 1 , the wireless communication system may also include other numbers of terminals and base stations. In addition, the wireless communication system may also include other network equipment, such as core network equipment.
- the terminal and the base station should know the predefined configuration of the wireless communication system, including the radio access technology (radio access technology, RAT) supported by the system, and the wireless resources specified by the system, such as radio frequency bands and carriers.
- the carrier is a frequency range that complies with system regulations. This frequency range can be jointly determined by the center frequency of the carrier (referred to as the carrier frequency) and the bandwidth of the carrier.
- the predefined configurations of these systems can be used as part of the standard protocol of the wireless communication system, or determined through the interaction between the terminal and the base station.
- the content of the standard protocol of the wireless communication system may be pre-stored in the memory of the terminal and the base station, and/or embodied as a hardware circuit or software code of the terminal and the base station.
- the terminal and the base station support one or more of the same RAT, such as 5G NR, 4G LTE, or the RAT of the future evolution system.
- the terminal and the base station use the same air interface parameters, coding scheme, modulation scheme, etc., and communicate with each other based on radio resources specified by the system.
- the air interface parameter is a parameter used to describe air interface characteristics. In English, air interface parameters are sometimes called numerology.
- the air interface parameters may include subcarrier spacing (subcarrier spacing, SC), and may also include a cyclic prefix (cyclic prefix, CP).
- the wireless communication system can support various air interface parameters, and these air interface parameters can be used as a part of the standard protocol.
- Multiple connectivity includes carrier aggregation, dual connectivity, and more.
- the dual connectivity technology means that the terminal may receive signals from two base stations in an area, and the resource transmission through the coordinated scheduling between the base stations can help improve user performance, and has a significant impact on the overall user throughput and handover delay. There is some help.
- 5G fifth generation
- 5G radio access network
- NGC Next Generation Core
- E-UTRA Evolved Universal Terrestrial Radio Access
- EPC Evolved Packet Core
- FIG. 2 is a schematic diagram of a dual connection scenario provided by the embodiment of the present application. As shown in FIG. 2 , it includes a terminal 21, a master node 22 (Master Node, MN) and a secondary node 24 (Secondary Node, SN).
- the master node 22 is a wireless access node that provides a control plane connection for the communication between the terminal 21 and the core network, and realizes the connection with the Mobility Management Entity (MME) through the control plane interface S1-MME.
- the secondary node 24 is a wireless access node that has no control plane connection with the core network and only provides additional resources for the terminal 21 .
- Each node is associated with a group of serving cells
- the primary node 22 corresponds to the primary cell group 23 (Master Cell Group, MCG)
- the secondary node corresponds to the secondary cell group 25 (Secondary Cell Group, SCG).
- MCG23 includes primary cell (Primary Cell, PCell) and optional one or more secondary cells (Secondary Cell, SCell);
- SCG25 includes auxiliary primary cell (Primary Secondary Cell, PSCell) and optional one or more Scell.
- the aforementioned PCell and PSCell may also be collectively referred to as a special cell (Special Cell, SpCell).
- the terminal 21 is configured such that the resources it uses are provided by two nodes 22, 24 connected by a non-ideal backhaul, wherein one node provides NR access and the other node provides E-UTRA or NR access.
- the core network also has the difference between NGC and EPC. Therefore, multi-mode dual connectivity can be mainly divided into the following four types:
- the E-UTRA-NR dual connectivity (EN-DC) mode of the evolved universal land-based wireless access and new air interface In this mode, the primary node 22 connected to the terminal 21 is an eNB, and the secondary node 24 is an en-gNB.
- the primary node 22 is connected to the core network EPC through the S1 interface, and connected to the secondary node 24 through the X2 interface.
- the secondary node 24 can be connected to the EPC through the S1-U interface, and connected to other en-gNBs through the X2-U interface.
- NR-E-UTRA dual connectivity (NE-DC).
- the primary node 22 connected to the terminal 21 is a gNB
- the secondary node 24 is an ng-eNB.
- the primary node 22 is connected to the core network NGC, and can be connected to the secondary node 24 through the Xn interface.
- NG-RAN E-UTRA-NR dual connectivity NGEN-DC
- the primary node 22 connected to the terminal 21 is an ng-eNB
- the secondary node 24 is a gNB.
- the primary node 22 is connected to the core network NGC, and may also be connected to the secondary node 24 through the Xn interface.
- NR-NR Dual Connectivity In this mode, the primary node 22 connected to the terminal 21 is a gNB, and the secondary node 24 is also a gNB. The primary node 22 is connected to the core network NGC through the NG interface, and is also connected to the secondary node 24 through the Xn interface.
- the master node is a 4G base station eNB, which can download control plane messages and user plane messages to the terminal
- the secondary node is a 5G base station gNB.
- a message may be sent to the terminal under the instruction of the master node, and the message includes a control plane message and a user plane message, both of which are from the master node.
- UE In EN-DC, UE is connected to two cell groups, namely MCG and SCG, each of which has a primary cell group (corresponding to primary node eNB) and possibly multiple secondary cell groups (corresponding to secondary node gNB). Since a cell group can be divided into a primary cell and a secondary cell, the multiple cells connected to the UE can be divided into the following three types: a primary cell PCell in the MCG, a primary secondary cell PSCell in the SCG, and There may be one or more SCells in each group.
- Conditional handover means that the network configures handover conditions for the terminal side.
- the use of conditional handover is determined by the network.
- the terminal side evaluates when the handover conditions are valid, and can support the conditional handover configuration of one or more candidate cells.
- the CHO configuration includes the CHO candidate cell configuration generated by the candidate target node and the execution conditions generated by the source node, and is sent to the terminal through the source node RRC connection reconfiguration message.
- the conditional handover process includes three stages: handover preparation, handover execution, and handover completion.
- the UE configures the measurement report based on the source node, and the source node decides whether to configure and use CHO after receiving the report from the UE.
- the source node decides to use CHO, it sends a handover request to the candidate target node, and sends a first RRC connection reconfiguration message to the UE after receiving the confirmation of the condition request, and the first RRC connection reconfiguration message carries the candidate target cell Synchronization information and conditions to assist the triggering conditions of primary cell change.
- the UE begins to evaluate the execution conditions when receiving the conditional handover configuration, and when it satisfies one or more CHO execution conditions, the UE is handed over to the target cell. Afterwards, the target cell node notifies the source node that UE handover is successful, and the source node sends a conditional handover cancel message to other candidate target nodes to cancel the conditional handover preparation of other candidate target nodes.
- Figure 3 is a schematic diagram of a simplified CHO process provided by the embodiment of the present application, where UE represents a terminal device, and NW represents a network, including a primary node and a secondary node, and can also refer to a cell and a cell group corresponding to a node.
- NW represents a network, including a primary node and a secondary node, and can also refer to a cell and a cell group corresponding to a node.
- the foregoing are collectively referred to as a network .
- the schematic diagram of the CHO process includes the following steps:
- Step 301 after the network configures the UE measurement process, the UE reports according to the measurement configuration and results.
- Step 302 the network decides to use the CHO, and the use of the CHO can be based on the measurement report, or can be determined based on the gNB.
- Step 303 the network prepares for CHO handover, mainly including selecting a candidate cell and allocating resources for the UE.
- Step 304 the network sends an RRC connection reconfiguration message to the UE, and the RRC connection reconfiguration message includes configuration of CHO candidate cells and CHO execution conditions.
- the CHO execution conditions may consist of one or two trigger conditions.
- Step 305 the UE sends an RRC reconfiguration complete message to the source gNB to indicate the successful reception and application of the RRC connection reconfiguration message in step 304.
- Step 306 after receiving the CHO configuration, the UE starts to evaluate the CHO execution conditions of the candidate cells.
- Step 307 the UE selects a target cell according to the CHO evaluation condition, and accesses the target cell.
- the target cell is one of the aforementioned candidate cells.
- Step 308 after the UE completes the synchronization with the candidate cell, it sends an RRC reconfiguration complete message to the network, and the RRC reconfiguration complete message is used to inform the network that the UE completes the CHO process.
- Step 309 the network updates relevant information, and completes the CHO handover.
- steps 301 to 305 correspond to the handover preparation phase of the CHO process
- steps 306 and 307 correspond to the handover execution phase
- steps 308 and 309 correspond to the handover completion phase.
- the preparation for CHO handover by the network is mainly that the source node sends a handover request to one or more cells under one or more candidate nodes, and these cells are the subsequent candidate cells.
- the source node sends a CHO request message to each candidate cell.
- the candidate cell After receiving the CHO request message, the candidate cell executes an admission control process to allocate resources for the UE. After the candidate cell completes the resource allocation operation, it sends a CHO handover request response message to the source node, and the CHO handover request response message carries configuration information of the CHO candidate cell. Since it is the candidate node to which the candidate cell belongs that performs the CHO handover request response message, it should be noted that each candidate node needs to send a CHO handover request response message for each candidate cell.
- step 305 after receiving the RRC connection reconfiguration message in step 304, the UE maintains the connection with the network (mainly the source node of the CHO handover), and starts to evaluate if it can receive the downlink message from the network CHO execution conditions of candidate cells. Therefore, in the handover execution phase of the CHO, the UE can accept the message about the RRC connection configuration from the network.
- the network mainly the source node of the CHO handover
- step 307 the UE selects a target cell from the candidate cells according to the CHO execution condition, and synchronously accesses the target cell.
- the synchronous access is a random access procedure.
- step 308 after the UE sends the RRC reconfiguration complete message, the CHO process ends at the UE.
- the UE may release the stored CHO configuration.
- the network updates CHO information, including the target node sending a handover success message to the source node, the source node notifying the target node of UE connection status information, and sending a CHO handover cancel message to other candidate nodes. That is, the network needs to update the connection state information of the UE from the source node to the target node, so that the core network can switch the path of the downlink data to the target node. In addition, the network also needs to cancel the CHO resources reserved for the UE by other candidate nodes, and release the information of the UE reserved by the source node, such as the context of the UE.
- the UE can implement conditional handover of the primary cell, the primary secondary cell and the secondary cell to enhance mobility.
- the conditional handover process may also be referred to as a conditional primary and secondary cell node change (Conditional PSCell Change, CPC) process. Since the primary secondary cell corresponds to the secondary node, the CPC process can also be regarded as a change of configuration of the secondary node by the UE.
- either the primary node or the secondary node in the network can configure the change conditions for the UE side.
- the UE measurement meets the CPC change conditions
- the UE and the target secondary node will perform synchronous access, and then release the source secondary node to complete the secondary node. changes.
- the configuration of the CPC change condition can be triggered by the primary node or the secondary node, and is used to transmit the UE context and secondary cell group configuration from the source secondary node to the target secondary node.
- the RRC connection reconfiguration message carrying the configuration of the CPC change condition and the information of the candidate cell group can be sent by the primary node, and this message can be carried by SRB1; in addition, this message can also be sent by the secondary node.
- the message is carried by SRB3.
- the UE After receiving the RRC connection reconfiguration message, the UE can identify the sender through the SRB bearer, and send an RRC reconfiguration complete message to the corresponding node in response to the RRC connection reconfiguration message.
- only the RRC connection reconfiguration message sent by the primary node and its corresponding primary cell is taken as an example, but it should be understood that the embodiment can also be extended to be sent by the secondary node and its corresponding secondary primary cell.
- Fig. 4 is a schematic diagram of a CPC process initiated by a secondary node provided in an embodiment of the present application.
- the subjects participating in this process are divided into UE and each cell. From the perspective of the execution object of signaling interaction, the cell can be understood is a base station, and from the perspective of the network, the cell can also be regarded as a corresponding master node or a slave node; here, for ease of understanding, it is referred to as a cell.
- the CPC process consists of the following steps:
- Step 401 the UE reports the measurement data to the source PSCell.
- Step 402 the source PSCell decides to initiate a CPC process, and the initiation of the CPC may be based on the measurement data or the decision of the PSCell.
- Step 403 the source PSCell sends a change request to the PCell, notifying the PCell of the candidate target PSCell and optional CPC conditions.
- Step 404 the PCell sends an addition request, requesting the candidate PSCell to allocate resources for the UE.
- the addition request sent by the PCell includes measurement data related to the candidate PSCell.
- Step 405 After receiving the addition request of the PCell, the candidate PSCell sends an addition request response message to the PCell.
- Step 406 the PCell sends an RRC reconfiguration message to the UE, including the CPC trigger condition and the synchronization information of the candidate PSCell.
- step 407 the UE sends an RRC reconfiguration complete message to the PCell to indicate the successful reception and application of the RRC reconfiguration message in step 406.
- step 408 the PCell sends an acknowledgment message to the source PSCell to inform the source PSCell of the success or failure of the addition request process.
- step 409 the PCell sends a reconfiguration complete message to the candidate PSCell to indicate the success of the RRC connection reconfiguration message sent to the UE in step 406.
- Step 4010 when the UE evaluates that the CPC condition is satisfied, it synchronizes to the target PSCell through random access.
- Step 4011 after completing the random access, the UE sends an RRC reconfiguration complete message to the PCell to indicate the completion of the CPC procedure.
- Step 4012 the target PSCell sends a primary and secondary cell handover success message to the PCell, informing the PCell that the UE has successfully connected to the target PSCell.
- Step 4013 the PCell sends a secondary node release request to the source PSCell and the candidate PSCell for releasing resources allocated to the UE by the candidate PSCell and the source PSCell, and the source PSCell and the candidate PSCell release the prepared resources upon receipt.
- Step 4014 the source PSCell and the candidate PSCell send a release request acknowledgment message to the PCell to confirm the receipt of the release request and the completion of resource release in the previous step.
- steps 401 to 409 correspond to the handover preparation phase of the CHO process
- step 4010 corresponds to the handover execution phase
- steps 4011 to 4014 correspond to the handover completion phase.
- the RRC connection reconfiguration message carries the synchronization information of the candidate target cell and the trigger condition of the CPC.
- the UE updates the above information and configuration, and starts the condition switching process by itself when the measurement result meets the relevant trigger conditions.
- the UE After starting the CPC process, the UE applies the relevant configuration of the target PSCell, updates the synchronization information of the target PSCell, completes synchronization with the target PSCell through the random access process, and then sends an RRC reconfiguration complete message to the network to indicate the completion of the CPC process.
- the PCell when the PCell receives the RRC reconfiguration complete message, it cannot know whether the UE has started the CPC procedure until it receives the second RRC reconfiguration complete message. That is, the PCell is notified of the CPC handover result of the UE by the UE and the target PSCell after the CPC procedure is completed.
- the network may send a new RRC connection reconfiguration message to the UE through the PCell, which can carry the RRC configuration information of any cell (such as the source PSCell) connected to multiple UEs, or carry the specified target PSCell RRC connection configuration information.
- the former is used to update the configuration of the source PSCell, and the latter is used to instruct the UE to access the designated target PSCell.
- this period see Figure 4, is referred to by the collision period.
- the UE may receive a new RRC connection reconfiguration message during the collision period.
- the UE postpones the operation response to the message until the CPC process is completed. Afterwards, the UE will apply the RRC connection configuration information carried in the new RRC connection reconfiguration message. Since this new RRC connection reconfiguration message carries the RRC connection configuration information of the source PSCell or the RRC connection configuration information of the target PSCell specified by the PCell, it can be understood that these configuration information are very likely to be different from the RRC configuration information of the cell after the UE completes the CPC. Unmatch. When the UE applies these configuration information, it will superimpose it on the existing configuration. However, this superposition operation is unreasonable, and may not succeed in superposition. If the superposition cannot succeed, it will cause the UE to fail to save the parameters, and according to the protocol, MCG reconstruction will be triggered, which will affect the continuity of the service; even if the superposition is successful, the superimposed parameters are likely to be wrong.
- the UE may also discard the new RRC connection reconfiguration message, and not apply the RRC connection configuration information about the cell carried by it. However, the UE must send an RRC reconfiguration complete message to the network after receiving the RRC connection reconfiguration message. If the UE does not apply the RRC connection configuration information, this will cause the network to receive an incorrect RRC reconfiguration complete message. In this case, the network will require the UE to re-establish the RRC connection, affecting service continuity, or even releasing the UE context, resulting in service interruption.
- the PCell cannot know the start of the UE handover to the PSCell in time, and it may send new RRC connection configuration information to the UE at any time, and the RRC connection configuration information can be about any cell connected by multiple UEs , may also be the target secondary primary cell for UE-specified handover.
- the UE must wait for the end of the CPC process before notifying the network that the assisted primary cell change is completed, and it may receive a new RRC connection configuration from the network during the collision period and must respond to it.
- the UE No matter applying the new configuration or not applying the new configuration, there will be a high probability of re-establishment of the cell group, affecting service continuity.
- the general idea of the embodiment of the present application is as follows: when the UE receives a new RRC connection reconfiguration message, it can autonomously interrupt the CPC process, and preferentially apply the configuration of the target PSCell carried in the RRC connection reconfiguration message information, so as to avoid the conflict between the configuration information issued by the network and the configuration information of the autonomous handover on the UE side, and optimize the service experience.
- the following embodiments are all compatible with existing standard protocols and serve as product implementation solutions.
- FIG. 5 it is a schematic diagram of a conditional PSCell change process provided by the embodiment of the present application.
- the UE begins by receiving the first RRC connection reconfiguration message from the network, the first RRC connection reconfiguration message carries the synchronization information of the candidate target cell and the trigger condition for changing the conditional auxiliary primary cell, so that when the trigger condition is When activated, the start condition assists primary cell change.
- This flow diagram includes the following steps:
- Step 501 receiving an RRC connection reconfiguration message from the network, the RRC connection reconfiguration message carrying the synchronization information of the candidate target cell and the trigger condition for changing the conditional auxiliary primary cell.
- Step 502 Send an RRC reconfiguration complete message to the network, and the RRC reconfiguration complete message is used to respond to the RRC connection reconfiguration message in step 501.
- Step 503 In the case of evaluating that the CPC condition is satisfied, start the CPC process.
- Step 504 in the CPC process, receive a new RRC connection reconfiguration message from the network, and the new RRC connection reconfiguration message carries node configuration information.
- Step 505 Send an RRC reconfiguration complete message to the PCell, where the RRC reconfiguration complete message is used to respond to the RRC connection reconfiguration message in step 504.
- Step 506 according to the information of the target secondary primary cell carried in the RRC connection reconfiguration message in step 504 , send an uplink message to indicate whether the handover of the target secondary primary cell is successful or not.
- the network sends an RRC connection reconfiguration message to the UE after judging that the conditional handover can be performed.
- the UE receives the synchronization information of the candidate target PPC and the trigger condition of the CPC carried in the message, selects the target PPC when the trigger condition is met, and starts the CPC process autonomously, which is used to try to connect the target PPC synchronously. enter.
- the network can issue a new RRC connection reconfiguration message to update the RRC connection on the UE side without knowing that the UE has started the CPC process. configuration.
- the CPC process that is, the aforementioned collision period, includes the following two situations:
- the RRC reconfiguration complete message is used to indicate the completion of the CPC process.
- the time periods included are: during the UE evaluating the CPC condition, during the random access process of the UE to the target PSCell satisfying the CPC condition, and before the UE completes the random access to the aforementioned PSCell and sends the third RRC reconfiguration complete message .
- the UE can roll back the RRC connection parameters modified due to the CPC according to its historical operations, so that it rolls back to before the CPC is started.
- the UE can superimpose the information carried in the received RRC connection reconfiguration message by suspending the CPC process and rolling back the RRC connection parameters.
- the information is related to any cell (such as the source PSCell) connected to the UE, MCG re-establishment caused by parameter superposition failure can be avoided.
- the RRC connection reconfiguration message carries the synchronization information of the specified target PSCell
- the UE superimposes the RRC connection configuration information and accesses the specified target PSCell instead of the target PSCell determined by the CPC procedure.
- the first period of time after the UE finishes executing the CPC process and sends the RRC reconfiguration complete message the first period of time is shorter than the time taken by the primary cell to receive the RRC reconfiguration complete message and issue a new RRC configuration.
- the RRC reconfiguration complete message is used to indicate the completion of the CPC procedure.
- the UE has completed updating the RRC connection configuration, so parameter rollback cannot be performed.
- the UE superimposes the RRC connection configuration information carried in the RRC reconfiguration complete message, and stops accessing the target PSCell indicated by the CPC procedure.
- the RRC connection reconfiguration message may be used to update the RRC connection configuration between the UE and any connected cell, including but not limited to measurement configuration, channel state information configuration, and the like.
- the above configurations are superimposed based on the original configurations that have not been changed by the CPC process, so they will conflict with the new configurations of the target cell after the UE initiates the conditional handover.
- the RRC connection reconfiguration message may also carry configuration information of the target secondary primary cell designated by the network, and is used to instruct the UE to change to and synchronize access to the specified target secondary primary cell.
- the UE When the UE terminates the CPC procedure, it receives the RRC connection reconfiguration message, and sends a corresponding RRC reconfiguration complete message after applying the RRC connection configuration information it carries. After that, the UE can confirm whether the parameter superposition is successful or not according to the content of the RRC connection reconfiguration message, and inform the network:
- the uplink message sent by the UE to the target PSCell is used for synchronous access, that is, a random access preamble message.
- the information carried in the RRC connection reconfiguration message does not include the above-mentioned synchronization information related to the target PSCell, that is, the information carried in the message is used to modify the RRC connection configuration information related to any cell (such as the source PSCell) connected to the UE.
- the UE sends an SCG failure information message to the PCell, and the SCG failure information message is used to inform the network that the UE has experienced SCG failure and needs to be reestablished.
- the UE receives the RRC connection reconfiguration message, and applies its configuration in time to prevent the corresponding RRC connection configuration information from being not adopted or mistakenly superimposed on the RRC connection reconfiguration message.
- the reconfiguration complete message is sent incorrectly, and the sending error includes missing content due to not using the aforementioned configuration information, which in turn causes the network to release resources and the MCG cell to be rebuilt.
- the RRC connection reconfiguration message since it is a modification of the RRC connection configuration between the UE and the cell, it will contain indicative information for the cell, which is carried by the cell group ID (cellGroupId) field and used to indicate Primary cell group or secondary cell group.
- cellGroupId cellGroupId
- the servCellIndex field is used to indicate the serving cell ID of the target PSCell. This field is an optional field, and only exists when the RRC connection reconfiguration message is about a secondary cell group. Specifically, when the received RRC configuration message is the reconfiguration of the PSCell, the message must contain the servCellIndex field; when the message carries the reconfiguration information of the PCell, this field is not included. Therefore, it can be judged that the RRC connection reconfiguration message is a parameter modification for PCell or PSCell by checking whether the field servCellIndex field is included in the received RRC connection reconfiguration message. If not included, it is for PCell, otherwise it is for RRC connection reconfiguration of PSCell.
- the reconfigurationWithSync field carries the specific configuration of the target spCell's cell-specific parameters, random access channel, etc. After applying the relevant configuration, the UE can initiate a random access procedure for the target spCell. It is worth noting that when MCG switching is performed, the existing SCG is released according to the protocol. At this time, the existing SCG configuration can be carried through the field to perform a new random access, thereby keeping the SCG configuration unchanged.
- the UE is selected to check whether the received RRC connection reconfiguration message contains the reconfigurationWithSync field when the cellGroupId field indicates a secondary cell group, so as to determine whether the RRC connection reconfiguration message is Parameter modification for the source PSC or the new target PSC. If the reconfigurationWithSync field is not included, it is for the source secondary primary cell; otherwise, it is connection reconfiguration for the target secondary primary cell, and the UE needs to perform random access.
- FIG. 6 it is a schematic diagram of a conditional PSCell change process provided by the embodiment of the present application, wherein the UE receives an RRC connection after starting the CPC process and before sending the RRC reconfiguration completion message indicating the completion of the CPC process.
- This flow diagram includes the following steps:
- Step 601. Receive an RRC connection reconfiguration message from the PCell, where the RRC connection reconfiguration message carries the synchronization information of the candidate target cell and the trigger condition for changing the conditional auxiliary primary cell.
- Step 602 Send an RRC reconfiguration complete message to the PCell, where the RRC reconfiguration complete message is used to respond to the RRC connection reconfiguration message in step 601.
- Step 603 In the case of evaluating that the CPC condition is satisfied, start the CPC process.
- Step 604 Receive an RRC connection reconfiguration message from the PCell, where the RRC connection reconfiguration message carries cell configuration information.
- Step 605 revoke the CPC configuration, so that the RRC connection configuration returns to before the CPC process starts.
- Step 606 Send an RRC reconfiguration complete message to the PCell, where the RRC reconfiguration complete message is used to respond to the RRC connection reconfiguration message in step 604.
- Step 607 according to the cell configuration information carried in the RRC connection reconfiguration message in step 604, if the message carries the synchronization information of the target PSCell, perform random access to the target PSCell.
- steps 601 to 604 reference may be made to steps 501 to 504, which will not be repeated here.
- the UE receives the RRC connection reconfiguration message before accessing the target PSCell that meets the CPC condition evaluation.
- the RRC connection configuration information carried in the message is inconsistent with the configuration information changed by the UE itself after the CPC evaluation, and the parameter superposition fails, which will cause conflicts and result in unsuccessful parameter saving.
- the UE cancels the RRC connection configuration information update performed after the CPC condition evaluation is met.
- the UE refers to its operation history records in the process of executing the CPC, cancels the operation (including modification and release) of the relevant parameters, and restores the above parameters to the state before the start of the CPC process, that is, the parameters are changed from the target auxiliary primary cell specified by the CPC
- the configuration content is changed back to before the CPC specifies the target auxiliary primary cell.
- the UE terminates the CPC process, releases relevant CPC resources, and no longer accesses the candidate secondary primary cell selected after the CPC evaluation. The UE does not notify the PCell of the failure to execute the CPC procedure.
- the UE applies all the RRC connection configuration information it carries according to the RRC connection reconfiguration message in step 604, and sends an RRC reconfiguration complete message after the application is completed, preventing the PCell from receiving the RRC reconfiguration information.
- Abnormal operation caused by configuration completion message such as release of UE context.
- step 607 the UE judges whether the RRC connection reconfiguration message in step 604 carries information about cell configuration, that is, whether it carries configuration information for accessing the target cell designated by the PCell for handover. According to the above introduction, the UE can perform the judgment by judging whether the message is the presence of reconfigurationWithSync in the case of the secondary cell group (through the cellGroupId field).
- the UE can start the random access process to the target PSCell, including sending a random access preamble message to it, and can instruct the handover The start of the program.
- the UE needs to initiate an SCG failure process and send an SCG failure message to the PCell.
- the message is used to inform the network that the UE has experienced an SCG failure and hopes that the network will instruct the SCG to be re-established. That is, the UE notifies the network of the failed handover result of the UE by sending an SCG failure message.
- the UE when the UE receives the RRC connection reconfiguration message in the CPC process, which results in the parameter configuration being hedged, it cancels the operation after the CPC is started, so as to respond to the second RRC connection reconfiguration message and configure the parameter information it carries .
- This avoids the UE context release that may be caused by not responding to the RRC connection reconfiguration message, and directly superimposes the parameters carried in the message without changing the parameters back to the original RRC connection, causing the UE to fail to save, further causing service interruption and MCG reconstruction.
- the UE sends different uplink messages to the network, so that when the RRC connection reconfiguration message does not indicate the target PSCell of the handover, the SCG failure process is actively triggered to avoid the failure of parameter superposition. MCG reconstruction.
- the RRC connection reconfiguration message received by the UE during the CPC process carries the synchronization information indicating the handover target PSCell, it can apply the RRC connection configuration information carried in the message and send the correct RRC connection configuration information to the network.
- the reconfiguration complete message avoids the rebuilding of the cell group and service interruption.
- FIG. 7 it is a schematic diagram of another CPC process provided by the embodiment of the present application, wherein, after the UE starts the CPC process and before sending the RRC reconfiguration completion message indicating the completion of the CPC process, the UE receives the RRC connection reconfiguration message with news.
- This flow diagram includes the following steps:
- Step 701 Receive an RRC connection reconfiguration message from the PCell, where the RRC connection reconfiguration message carries the synchronization information of the candidate target cell and the trigger condition of the CPC.
- Step 702 Send an RRC reconfiguration complete message to the PCell, where the RRC reconfiguration complete message is used to respond to the RRC connection reconfiguration message in step 701.
- Step 703 In the case of evaluating that the CPC condition is satisfied, start the CPC process.
- Step 704 Send an RRC connection reconfiguration message to the PCell, where the RRC connection reconfiguration message is used to indicate the completion of the CPC procedure.
- Step 705 Receive an RRC connection reconfiguration message from the PCell, where the RRC connection reconfiguration message carries cell configuration information.
- Step 706 Send an RRC reconfiguration complete message to the PCell, where the RRC reconfiguration complete message is used to respond to the RRC connection reconfiguration message in step 705.
- Step 707 According to the information of the target PSCell carried in the RRC connection reconfiguration message in step 705, if the message does not carry the synchronization information of the target PSCell, send a secondary cell group failure information message to the PCell to indicate the target PSCell PSCell switching failed.
- steps 701 to 703 reference may be made to steps 501 to 503, which will not be repeated here.
- the UE After completing the access to the target PSCell whose CPC condition evaluation is satisfied, the UE sends an RRC reconfiguration complete message to the PCell, as shown in step 704, to indicate the completion of the CPC procedure.
- the UE receives an RRC connection reconfiguration message from the PCell within the first time period after sending the message, and the first time period is less than the total time for the PCell to send another RRC configuration message after receiving the aforementioned RRC reconfiguration complete message , as shown in step 705. That is, when the UE has completed the CPC procedure and completed the uplink synchronization with the target PSCell specified by the CPC, it receives the RRC connection reconfiguration message from the PCell.
- the cells indicated by the two are inconsistent, resulting in parameter hedging.
- the specific value of the first duration may be an experience value of the base station performing the above operations, and the range may be between 30 and 50 milliseconds.
- the UE since the UE sends the RRC reconfiguration complete message indicating the completion of the CPC procedure, the CPC procedure has ended for the UE, and the modification of the RRC connection configuration brought about by this procedure cannot be undone. Based on this, the UE must superimpose the RRC connection configuration content carried in the received RRC connection reconfiguration message on the relevant parameters after modification, and then send an RRC reconfiguration complete message as shown in step 706 to respond to the RRC connection reconfiguration with news.
- step 707 the UE judges whether the RRC connection reconfiguration message carries information about cell configuration, that is, whether it carries configuration information for accessing a target cell specified by the PCell. According to the above introduction, the UE can perform the judgment by judging whether the message is the presence of reconfigurationWithSync in the case of the secondary cell group (through the cellGroupId field).
- the UE needs to initiate an SCG failure process and send an SCG failure message to the PCell.
- the message is used to inform the network that the UE has experienced an SCG failure and hopes that the network will instruct the SCG to be re-established. That is, the UE informs the network of the failed handover result of the UE by sending an SCG failure message.
- the UE when the received RRC connection reconfiguration message is not the configuration of the designated target PSCell, and the parameter modification cannot be withdrawn, and the RRC connection configuration should not be superimposed, the UE actively triggers the secondary cell group failure process, and uses the SCG re-establishment to Avoid MCG reconstruction caused by parameter superposition failure, let the network participate in subsequent SCG reconstruction, thereby reducing the delay of service recovery.
- Step 801 Receive an RRC connection reconfiguration message from the PCell, the RRC connection reconfiguration message carrying the synchronization information of the candidate target cell and the trigger condition for changing the conditional auxiliary primary cell.
- Step 802 Send an RRC reconfiguration complete message to the PCell, where the RRC reconfiguration complete message is used to respond to the RRC connection reconfiguration message in step 601.
- Step 803 In the case of evaluating that the CPC condition is met, start the CPC process.
- Step 804 Send a CPC execution notification message to the PCell, which is used to indicate the start of the CPC process.
- Step 805 Receive a CPC execution response message from the PCell, which is used to indicate that the CPC execution notification message is successfully received.
- Step 806 After the CPC procedure is completed, send an RRC reconfiguration complete message to the PCell to indicate the completion of the CPC procedure.
- the UE After step 805, after receiving the CPC execution response message, the UE starts to execute the CPC process and modifies relevant configuration information.
- the primary node corresponding to the PCell keeps the configuration of the UE unchanged, and delays processing the message from the core network or the secondary node that requires the UE to change the configuration information of the RRC connection.
- the master node maintains the configuration of the UE until the RRC reconfiguration complete message in step 806 is received. That is, the network does not make any changes to the RRC connection configuration of the UE when the UE executes the CPC procedure.
- the network needs to reconfigure the RRC connection for the UE, wait for the UE to notify the CPC process through the RRC reconfiguration complete message, and then send the RRC connection reconfiguration message to the UE to avoid parameter hedging caused by sending this message during the CPC process.
- the UE adds a handshake process with the network (that is, notifies the network that the CPC process starts and waits for the network response), thereby preventing the network from sending an RRC connection reconfiguration message during the CPC process, and solving parameter hedging The problem.
- the problem of parameter hedging can also be solved by adding a protocol path.
- FIG. 9 another CPC process schematic diagram provided in the embodiment of the present application includes the following steps:
- Step 901 Receive an RRC connection reconfiguration message from the PCell, where the RRC connection reconfiguration message carries the synchronization information of the candidate target cell and the trigger condition of the CPC.
- Step 902 Send an RRC reconfiguration complete message to the PCell, where the RRC reconfiguration complete message is used to respond to the RRC connection reconfiguration message in step 701.
- Step 903 In the case of evaluating that the CPC condition is met, start the CPC process.
- Step 904 Receive an RRC connection reconfiguration message from the PCell, where the RRC connection reconfiguration message carries cell configuration information.
- Step 905 Send an RRC reconfiguration complete message to the PCell, where the RRC reconfiguration complete message is used to indicate the end of the CPC procedure.
- Step 906 Send an RRC reconfiguration complete message to the target PSCell, where the RRC reconfiguration complete message is used to indicate the end of the CPC procedure.
- Step 907 perform random access to the target PSCell.
- Step 908 Send an RRC reconfiguration complete message to the PCell, which is used to indicate the group of cells whose parameters are successfully superimposed, and the parameters are carried in the RRC connection reconfiguration message in step 904 .
- Step 909 Receive an RRC connection reconfiguration message from the PCell, where the information carried in the RRC connection reconfiguration message is used to indicate the operation of the cell group whose parameter superposition fails.
- the UE receives the RRC connection reconfiguration message, and the cell configuration information that the message can carry includes configuration information for cells in the primary cell group and configuration information for cells in the secondary cell group.
- the modified RRC connection configuration information is mainly about the PSCell in the secondary cell group.
- the message only includes the configuration information of the cells of the primary cell group, the behavior of parameter superposition occurs on the parameters related to the primary cell group, and the possibility of being affected is low.
- the message contains the configuration information of the cells of the secondary cell group
- the behavior of parameter superposition occurs on the parameters related to the secondary cell group, and these parameters are likely to be changed due to the CPC process, so parameter superposition occurs failure, resulting in interruption of business.
- the UE For the RRC connection reconfiguration message, the UE first completes the CPC procedure, that is, completes the synchronous access to the target PSCell selected by the CPC procedure (steps 905 to 907). Afterwards, the UE performs parameter superposition according to the cell configuration information carried in the aforementioned RRC connection reconfiguration message.
- the RRC connection reconfiguration message carries the configuration information of the cells of the secondary cell group
- a protocol path is added to notify the PCell that the UE only takes effect in step 904
- the configuration information of the cells of the primary cell group carried in the RRC connection reconfiguration message may be implemented by adding a corresponding indication field in the 4G RRC reconfiguration complete message.
- the PCell and its corresponding master node can know that the UE has validated the configuration information of the cells of the primary cell group, but failed to validate the configuration information of the cells of the secondary cell group. Therefore, the PCell sends a new RRC connection reconfiguration message to instruct the UE to process the cell configuration of the secondary cell group, for example, release the existing secondary cell group resources and simultaneously establish a new secondary cell group, or configure the primary cell group Perform overall reconfiguration with the secondary cell group.
- the former can be implemented through the ReleaseAndAdd field for the secondary cell group carried in the RRC connection reconfiguration message, and the latter can be realized through the fullConfig field carried in the message.
- the UE can notify the PCell (ie, its corresponding master node and the network) that parameter hedging has occurred to the UE through the new protocol channel, so that through the intervention of the network, the reconstruction of the cell group caused by the failure of parameter superposition can be avoided, and the service efficiency can be enhanced. continuity.
- PCell ie, its corresponding master node and the network
- a wireless communication device provided by an embodiment of the present application is introduced below.
- the communication device 1000 includes a processing unit 1010 and a transceiver unit 1020 , which are connected by a line.
- the wireless communication device is used to implement each step corresponding to the terminal in each of the above embodiments:
- the processing unit 1010 is used to control the transceiver unit 1020 to communicate with the network; and is used to control the transceiver unit to start a random access procedure when sensing service requirements, so as to establish an RRC connection with the network.
- the transceiver unit 1020 is configured to receive a first RRC connection reconfiguration message, send a first RRC reconfiguration complete message, receive a second RRC connection reconfiguration message from the primary cell, and send a second RRC reconfiguration complete message to the primary cell .
- the transceiver unit 1020 is further configured to initiate a random access procedure to the target secondary primary cell when the cell configuration information carried in the second RRC connection reconfiguration message includes the synchronization information of the target PSCell .
- the transceiver unit 1020 is further configured to send the secondary cell group information to the primary cell when the cell configuration information carried in the second RRC connection reconfiguration message does not include the configuration information of the target secondary primary cell. Failure information message.
- the transceiver unit 1020 is further configured to receive the second RRC connection reconfiguration message before sending the third RRC reconfiguration complete message to the primary cell, and the third RRC reconfiguration The completion message is used to indicate the end of the conditional assisted primary cell change procedure.
- the transceiving unit 1020 is further configured to receive the second RRC connection reconfiguration message before sending the third RRC reconfiguration complete message to the primary cell.
- the transceiving unit 1020 is further configured to receive the second RRC connection reconfiguration message within a first time period after sending the third RRC reconfiguration complete message to the primary cell.
- the transceiver unit 1020 is further configured to receive the second RRC connection reconfiguration message within a first time period after sending the third RRC reconfiguration complete message to the primary cell; wherein, The first duration is shorter than the time it takes for the primary cell to receive the RRC reconfiguration complete message and issue a new RRC configuration.
- the processing unit 1010 further includes a timer, and is configured to start the timer after the transceiver unit sends the third RRC connection reconfiguration message, and the duration of the timer is the first duration.
- the processing unit 1010 further includes a method for determining whether synchronization information of the target PSCell is included in the cell configuration information carried in the second RRC connection reconfiguration message.
- the transceiver unit 1020 may also be divided into a receiving unit and a sending unit, each of which has the function of receiving and sending, which is not limited here.
- the above-mentioned communication device may also include a storage unit, which is used to store data or instructions (also referred to as codes or programs), and each of the above-mentioned units may interact or be coupled with the storage unit to implement corresponding methods or functions .
- the coupling in the embodiments of the present application is an indirect coupling or a communication connection between devices, units or modules, which may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
- the division of units in the communication device is only a division of logical functions, which may be fully or partially integrated into one physical entity or physically separated during actual implementation.
- the units in the communication device can be implemented in the form of software calling through the processing elements; they can also be implemented in the form of hardware; some units can also be implemented in the form of software calling through the processing elements, and some units can be implemented in the form of hardware.
- each unit can be an independently established processing element, or can be integrated into a certain chip of the communication device.
- it can also be stored in the memory in the form of a program, which is called and executed by a certain processing element of the communication device. function of the unit.
- all or part of these units can be integrated together, or implemented independently.
- the processing element described here may also be referred to as a processor, and may be an integrated circuit with a signal processing capability.
- each step of the above method or each unit above may be implemented by an integrated logic circuit of hardware in the processor element or implemented in the form of software called by the processing element.
- the units in any of the above communication devices may be one or more integrated circuits configured to implement the above method, for example: one or more specific integrated circuits (application specific integrated circuit, ASIC), or, one or multiple microprocessors (digital signal processor, DSP), or, one or more field programmable gate arrays (field programmable gate array, FPGA), or a combination of at least two of these integrated circuit forms.
- ASIC application specific integrated circuit
- DSP digital signal processor
- FPGA field programmable gate array
- the units in the communication device can be implemented in the form of a processing element scheduler
- the processing element can be a general-purpose processor, such as a central processing unit (central processing unit, CPU) or other processors that can call programs.
- CPU central processing unit
- these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).
- SOC system-on-a-chip
- the wireless communication device may be a wireless communication device or a network device, or may be a chip or a circuit, such as a chip or a circuit that may be provided in a wireless communication device.
- a circuit such as a chip or a circuit that may be set in a network device, is used to implement the methods in the above method embodiments.
- the communication device 1100 includes: a processor 1110 and a transceiver 1130 .
- the communication device 1100 further includes a memory 1120 , which is indicated by a dotted line box in the figure as optional.
- the transceiver 1130 is used to communicate with other devices. Wherein, the processor 1110, the memory 1120, and the transceiver 1130 implement connection and data communication through a bus.
- the processor 1110 may be a chip.
- the processor 1110 may be a field programmable gate array (field programmable gate array, FPGA), may be an application specific integrated circuit (ASIC), may also be a system chip (system on chip, SoC), or It can be a central processing unit (central processor unit, CPU), or a network processor (network processor, NP), or a digital signal processing circuit (digital signal processor, DSP), or a microcontroller (micro controller) unit, MCU), it can also be a programmable controller (programmable logic device, PLD) or other integrated chips.
- FPGA field programmable gate array
- ASIC application specific integrated circuit
- SoC system on chip
- CPU central processing unit
- NP network processor
- DSP digital signal processing circuit
- microcontroller micro controller
- MCU microcontroller
- PLD programmable logic device
- each step of the above method may be completed by an integrated logic circuit of hardware in the processor 1110 or instructions in the form of software.
- the steps of the methods disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor 1110 .
- the software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register.
- the storage medium is located in the memory 1120, and the processor 1110 reads the information in the memory 1120, and completes the steps of the above method in combination with its hardware.
- the functions of the processing unit 1010 in FIG. 10 and their implementation process may be implemented by the processor 1110 in the communication device 1100 shown in FIG. 11 calling computer-executable instructions stored in the memory 1120 .
- the function/implementation process of the transceiver unit 1020 in FIG. 10 may be implemented by the transceiver 1130 in the communication device 1100 shown in FIG. 11 .
- the processor 1110 in the embodiment of the present application may be an integrated circuit chip, which has a signal processing capability.
- each step of the above-mentioned method embodiments may be completed by an integrated logic circuit of hardware in a processor or instructions in the form of software.
- the above-mentioned processor may be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components .
- DSP digital signal processor
- ASIC application-specific integrated circuit
- FPGA field-programmable gate array
- Various methods, steps, and logic block diagrams disclosed in the embodiments of the present application may be implemented or executed.
- a general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.
- the steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor.
- the software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register.
- the storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.
- the memory 1120 may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories.
- the non-volatile memory can be read-only memory (read-only memory, ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically programmable Erases programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
- Volatile memory can be random access memory (RAM), which acts as external cache memory.
- RAM static random access memory
- SRAM static random access memory
- DRAM dynamic random access memory
- DRAM synchronous dynamic random access memory
- SDRAM double data rate synchronous dynamic random access memory
- double data rate SDRAM double data rate SDRAM
- the communication device may include a processor 1110 , a transceiver 1130 and a memory 1320 .
- the memory 1120 is used to store instructions
- the processor 1110 is used to execute the instructions stored in the memory 1120, which can be implemented by the wireless communication device in any one or more of the corresponding methods shown in FIGS. 6 to 7 above. A step of.
- At least one (one, species) of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be single or Multiple. "Multiple" means two or more than two, and other quantifiers are similar.
- sequence numbers of the above-mentioned processes do not mean the order of execution, and the execution order of the processes should be determined by their functions and internal logic, and should not be used in the embodiments of the present application.
- the implementation process constitutes any limitation.
- the technical solutions provided by the embodiments of the present application may be fully or partially implemented by software, hardware, firmware or any combination thereof.
- software When implemented using software, it may be implemented in whole or in part in the form of a computer program product.
- the computer program product includes one or more computer instructions.
- the computer program instructions When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part.
- the computer may be a general-purpose computer, a special-purpose computer, a computer network, a terminal device, a network device, an artificial intelligence device or other programmable devices.
- the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server, or data center by wired (eg, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (eg, 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 including a server, a data center, and the like integrated with one or more available media.
- the available medium may be a magnetic medium (such as a floppy disk, a hard disk, or a magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid state disk (solid state disk, SSD)), etc.
- the various embodiments may refer to each other, for example, the methods and/or terms between the method embodiments may refer to each other, for example, the functions and/or terms between the device embodiments may refer to each other, such as the device Functions and/or terms between the embodiments and the method embodiments may refer to each other.
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Abstract
本申请涉及无线通信技术领域,公开了一种辅助主小区的条件变更方法和装置。其中,方法包括:接收第一无线链路控制RRC连接重配消息,该消息携带候选辅助主小区PSCell的同步信息和条件辅助主小区变更CPC的触发条件信息;发送第一RRC重配完成消息;在执行CPC过程中,接收第二RRC连接重配消息,该消息携带小区配置信息;发送第二RRC重配完成消息;当所述第二RRC连接重配消息携带有目标PSCell的同步信息时,向所述目标PSCell发起随机接入过程。采用上述方案,可以解决终端设备在CPC的执行过程中,接收到第二RRC连接重配消息导致的参数对冲问题,通过主动中断CPC流程,及时响应第二RRC连接重配消息,并根据其携带的小区信息,发送不同的上行消息,指示PSCell的切换成功与否。
Description
本申请实施例涉及通信领域,尤其涉及一种辅助主小区的条件变更方法和装置。
如今的无线通信网络被广泛部署在生活中,以便提供多元化的通信服务,例如语音、视频、分组数据、消息传送、广播等。基于不同的无线应用场景和多元业务的需求,无线接入技术和无线通信网络能够多样化发展,并将在较长的一段时间内共存、互补。多种适合于不同无线应用场景的业务网络和无线接入技术构成一个无缝覆盖、能够提供良好业务体验的多制式通信网络,这样,用户就是处在一个多制式通信网络覆盖的环境中。
以移动通信技术网络为例,如长期演进(Long Term Evolution,LTE)网络和新无线电(New Radio,NR)网络,就面临长期共存的情况。而为了实现通信网络系统间的互连、提高整个移动网络系统的无线资源利用率,双连接(Dual-Connectivity,DC)技术被引入,用以支持终端同时连接两个小区,增加单用户的吞吐量。两个小区各自对应主小区组(Master Cell group,MCG)和辅小区组(Secondary Cell group,SCG),其中,终端首先发起随机接入的小区所在的小区组就是主小区组。
当终端进行移动时,需要在小区间进行切换。为进一步增强终端的移动性,条件切换技术被引入使终端的上报能力支持条件切换。即,当终端收到候选小区对应基站下发的条件切换的配置时,终端不立即执行切换动作,继续对候选小区进行测量评估,当满足切换条件时,选择相应的小区进行随机接入。对于MCG的条件切换过程,一般称为条件切换(Conditional Handover,CHO);对于SCG而言,一般称为辅助主小区的条件变更(Conditional PSCell Change,CPC)。
现有技术中,多制式双连接场景下,有条件的辅助主小区变更的执行过程包含随机接入,随机接入的流程占用较长时间,且由于空口消息的下发有顺序,存在终端进行辅助主小区切换后、仍收到源小区的配置信息。这可能导致终端侧配置信息的错误叠加,进而终端重建MCG,影响业务连续性。因此有必要研究改进有条件的辅助主小区变更方法,避免不必要的MCG重建,提升用户的通信体验。
发明内容
本申请实施例提供一种辅助主小区的条件变更方法和装置,用以在CPC流程与基站下发的无线链路连接RRC配置消息冲突时,避免配置信息的错误使用导致的不必要的MCG重建,从而保证用户业务质量与通信体验。
第一方面,本申请实施例提供一种无线通信的方法,该方法可由无线通信装置来执行。该方法包括:接收第一无线链路控制RRC连接重配消息,所述第一RRC连接重配置消息携带候选辅助主小区的同步信息和条件辅助主小区变更CPC的触发条件信息;发送第一RRC重配完成消息,所述第一RRC重配完成消息用于响应所述第一RRC连接重配消息;在执行条件辅助主小区变更过程中,接收来自主小区的第二RRC连接重配消息,所述第二RRC连接重配置消息携带小区配置信息;向所述主小区发送第二RRC重配完成消息,所述第二RRC 重配完成消息用于响应所述第二RRC连接重配消息;当所述第二RRC连接重配消息携带的小区配置信息包括目标辅助主小区的同步信息时,向所述目标辅助主小区发起随机接入过程。在一种可能的实现方式中,可以通过该消息内指示辅助主小区的信息(如辅小区组序号)与ReconfigurationWithSync字段,确定该消息携带的小区配置信息为目标辅助主小区的同步信息。
基于上述的方法,终端通过中断进行中的CPC流程、优先响应携带有目标辅助主小区的配置信息的第二RRC连接重配消息,避免因为不响应第二RRC连接重配消息而导致的主小区组重建、或将第二RRC连接重配消息携带的配置信息简单叠加,所可能导致的配置参数保持失败、小区组必须重建以及业务中断。
作为另一种可能的实现方式,终端在当所述第二RRC连接重配消息携带的小区配置信息不包括目标辅助主小区的同步信息时,向所述主小区发送辅小区组失败信息消息。
基于上述的方法,终端通过中断进行中的CPC流程,在判断该RRC连接重配消息不携带目标辅助主小区的同步信息时,主动发起辅小区组失败流程,要求网络对终端进行小区指派、重建辅小区组,防止被网络释放终端上下文而导致的小区组重建。
在上述方法的具体实现中,终端在所述执行条件辅助主小区变更过程中,接收来自所述主小区的第二RRC连接重配消息,包括:在向所述主小区发送第三RRC重配完成消息之前,接收到所述第二RRC连接重配消息,所述第三RRC重配完成消息用于指示条件辅助主小区变更流程的结束。
又或者,在另一种可能的实现方式中,终端在所述执行条件辅助主小区变更过程中,接收来自所述主小区的第二RRC连接重配消息,包括:在向所述主小区发送第三RRC重配完成消息后的第一时长内,接收到所述第二RRC连接重配消息。所述第一时长小于所述主小区接收RRC重配完成消息并下发新的RRC配置的耗时,可以为固定值。在一种可能的实现方式中,其数值范围在30到50毫秒。
在该技术方案中,终端通过中断进行中的CPC流程,响应接收到的第二RRC连接重配消息,判断该消息不携带有目标辅助主小区的同步信息时,主动触发辅助小区组失败流程。避免终端因为不响应该消息,导致的主小区组重建,业务被中断。终端还可以通过辅小区组建立失败消息,告知网络辅助小区组的建立失败,要求网络参与辅小区组的重建,帮助实现新的辅助主小区的接入。
第二方面,本申请实施例提供另一种无线通信的方法,该方法可由无线通信装置来执行。该方法包括:接收第一RRC连接重配消息,该消息携带候选辅助主小区的同步信息和条件辅助主小区变更的触发条件信息;发送第一RRC重配完成消息,该消息用于响应前述第一RRC连接重配消息;在执行CPC流程前,发送CPC执行通知消息,用于告知网络终端启动CPC流程;接收CPC执行响应消息,用于响应CPC执行通知消息;收到该CPC执行响应消息后,启动CPC流程。
在该技术方案中,终端通过在启动CPC流程前,告知网络终端的操作,使网络可以暂停对终端的RRC连接配置信息的修改,从而避免终端在CPC过程中接收RRC连接配置消息,造成参数冲突。该方法可以使参数冲突的情况不发生,使小区组没有重建的风险、业务没有中断的风险。
第三方面,本申请实施例提供另一种无线通信的方法,该方法可由无线通信装置来执行。 该方法包括:发送第一RRC连接重配消息,该消息携带候选辅助主小区的同步信息和条件辅助主小区变更的触发条件信息;接收第一RRC重配完成消息,该消息用于响应前述第一RRC连接重配消息;接收CPC执行通知消息,用于获悉终端开始启动CPC流程;发送CPC执行响应消息,用于响应CPC执行通知消息;接收第二RRC重配完成消息,该消息用于指示CPC流程完成;在此期间,不发送其他RRC连接重配消息,该消息用以改变终端。
在该技术方案中,网络通过在终端启动CPC流程前,获悉终端即将进行的切换行为,停止发送其他RRC连接重配消息以更改终端的RRC连接配置信息。通过锁定RRC连接配置信息不变,避免因为下发RRC连接重配消息时机不当导致终端发生参数保存失败,重建小区组。
第四方面,本申请实施例提供另一种无线通信的方法,该方法可由无线通信装置来执行。该方法包括:接收第一RRC连接重配消息,该消息携带候选辅助主小区的同步信息和条件辅助主小区变更的触发条件信息;发送第一RRC重配完成消息,该消息用于响应前述第一RRC连接重配消息;在执行CPC的过程中,接收到来自主小区的第二RRC连接重配消息,所述第二RRC连接重配消息携带小区配置信息;发送第二RRC重配完成消息,该消息用于响应前述第二RRC连接重配消息;向目标辅助主小区进行同步接入;向主小区发送RRC重配完成消息,该消息用于指示参数叠加成功的小区组的配置完成;接收来自主小区的RRC连接重配消息,该消息用于指示参数叠加失败的小区组的操作。
在该技术方案中,终端通过增加协议通路,使RRC重配完成消息可以携带字段,该字段用于指示参数叠加成功的小区组的配置完成。通过该协议通路,终端可以告知网络在终端发生了参数冲突,等待网络的参与,以解决该问题。
第五方面,本申请实施例提供另一种无线通信的方法,该方法可由无线通信装置来执行。该方法包括:发送第一RRC连接重配消息,该消息携带候选辅助主小区的同步信息和条件辅助主小区变更的触发条件信息;接收第一RRC重配完成消息,该消息用于响应前述第一RRC连接重配消息;在终端执行CPC的过程中,发送来自主小区的第二RRC连接重配消息,所述第二RRC连接重配消息携带小区配置信息;接收第二RRC重配完成消息,该消息用于响应前述第二RRC连接重配消息;在终端接入目标辅助主小区后,接收第三RRC重配完成消息,该消息用于指示终端参数叠加成功的小区组的配置完成;发送RRC连接重配消息,该消息用于指示终端对参数叠加失败的小区组的操作。
在该技术方案中,通过增加协议通路(即RRC重配完成消息携带的字段),该协议通路用于指示终端侧参数叠加成功的小区组的配置完成,由此,网络可以获悉终端有小区组发生参数叠加失败。基于上述协议通路,网络可以指示终端对参数叠加失败的小区进行释放重建,加快终端小区组的重建速度,加速业务的恢复。
第六方面,本申请实施例提供一种无线通信装置,包括处理单元和收发单元,其中,所述处理单元用于控制所述收发单元,以实现上述第一至第五方面的方法或其任一可能的实现方法。
第七方面,本申请实施例提供一种无线通信装置,该装置可以是终端,也可以是基站,还可以是用于终端或基站的芯片。该装置具有实现上述第一至第五方面的方法或其任一可能的实现方法的功能。该功能可以通过硬件实现,也可以通过硬件执行相应的软件实现。该硬 件或软件包括一个或多个与上述功能相对应的模块。
第八方面,本申请实施例提供一种无线通信装置,包括处理器和存储器。可选的,还包括收发器。该存储器用于存储计算机程序或指令,该处理器用于从存储器中调用并运行该计算机程序或指令,当处理器执行存储器中的计算机程序或指令时,使得该无线通信装置执行上述第一方面至第五方面任一种无线通信方法中的任一种实施方式。
可选的,处理器为一个或多个,存储器为一个或多个。
可选的,存储器可以与处理器集成在一起,或者存储器与处理器分离设置。
可选的,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。
第九方面,提供了一种系统,系统包括上述无线通信装置和网络设备。
第十方面,提供了一种计算机程序产品,计算机程序产品包括:计算机程序(也可以称为代码,或指令),当计算机程序被运行时,使得计算机执行上述第一方面至第五方面中任一种可能实现方式中的方法,或者使得计算机执行上述第一方面至第五方面任一种实现方式中的方法。
第十一方面,提供了一种计算机可读存储介质,计算机可读介质存储有计算机程序(也可以称为代码,或指令)当其在计算机上运行时,使得计算机执行上述第一方面至第五方面中任一种可能实现方式中的方法,或者使得计算机执行上述第一方面至第五方面任一种实现方式中的方法。
第十二方面,提供了一种芯片系统,该芯片系统可以包括处理器。该处理器与存储器耦合,可用于执行第一方面至第五方面中任一方面,以及第一方面至第五方面中任一方面中任一种可能实现方式中的方法。可选地,该芯片系统还包括存储器。存储器,用于存储计算机程序(也可以称为代码,或指令)。处理器,用于从存储器调用并运行计算机程序,使得安装有芯片系统的设备执行第一方面至第五方面中任一方面,以及第一方面至第五方面中任一方面中任一种可能实现方式中的方法。
第十三方面,提供了一种无线通信装置,包括:接口电路和处理电路。接口电路可以包括输入电路和输出电路。处理电路用于通过输入电路接收信号,并通过输出电路发射信号,使得第一方面至第五方面任一方面,以及第一方面至第五方面中任一种可能实现方式中的方法被实现。
在具体实现过程中,无线通信装置可以为芯片,输入电路可以为输入管脚,输出电路可以为输出管脚,处理电路可以为晶体管、门电路、触发器和各种逻辑电路等。输入电路所接收的输入的信号可以是由例如但不限于接收器接收并输入的,输出电路所输出的信号可以是例如但不限于输出给发射器并由发射器发射的,且输入电路和输出电路可以是同一电路,该电路在不同的时刻分别用作输入电路和输出电路。本申请实施例对处理器及各种电路的具体实现方式不做限定。
在一种实现方式中,无线通信装置可以是无线通信设备,即支持无线通信功能的计算机设备。具体地,无线通信设备可以是诸如智能手机这样的终端,也可以是诸如基站这样的无线接入网设备。系统芯片也可称为片上系统(system on chip,SoC),或简称为SoC芯片。通信芯片可包括基带处理芯片和射频处理芯片。基带处理芯片有时也被称为调制解调器(modem)或基带芯片。射频处理芯片有时也被称为射频收发机(transceiver)或射频芯片。 在物理实现中,通信芯片中的部分芯片或者全部芯片可集成在SoC芯片内部。例如,基带处理芯片集成在SoC芯片中,射频处理芯片不与SoC芯片集成。接口电路可以为无线通信设备中的射频处理芯片,处理电路可以为无线通信设备中的基带处理芯片。
在又一种实现方式中,无线通信装置可以是无线通信设备中的部分器件,如系统芯片或通信芯片等集成电路产品。接口电路可以为该芯片或芯片系统上的输入/输出接口、接口电路、输出电路、输入电路、管脚或相关电路等。处理器也可以体现为处理电路或逻辑电路。
图1为本申请实施例提供的一种无线通信系统的结构示意图;
图2为本申请实施例提供的一种双连接场景示意图;
图3为本申请实施例提供的简化的条件切换流程示意图;
图4为本申请实施例提供的一种辅节点激发的条件辅助主小区变更流程示意图;
图5为本申请实施例提供的一种条件辅助主小区变更流程流程示意图;
图6为本申请实施例提供的另一种条件辅助主小区变更流程流程示意图;
图7为本申请实施例提供的另一种条件辅助主小区变更流程流程示意图;
图8为本申请实施例提供的另一种条件辅助主小区变更流程流程示意图;
图9为本申请实施例提供的另一种条件辅助主小区变更流程流程示意图;
图10为本申请实施例提供的一种无线通信装置的示意性框图;
图11为本申请实施例提供的一种无线通信装置的结构示意图。
应理解,上述结构示意图中,各框图的尺寸和形态仅供参考,不应构成对本申请实施例的排他性的解读。结构示意图所呈现的各框图间的相对位置和包含关系,仅为示意性地表示各框图间的结构关联,而非限制本申请实施例的物理连接方式。
下面结合附图并举实施例,对本申请提供的技术方案作进一步说明。应理解,本申请实施例中提供的系统结构和业务场景主要是为了解释本申请的技术方案的一些可能的实施方式,不应被解读为对本申请的技术方案的唯一性限定。本领域普通技术人员可以知晓,随着系统的演进,以及更新的业务场景的出现,本申请提供的技术方案对于相同或类似的技术问题仍然可以适用。
应理解,本申请实施例提供的技术方案,包括安全模式激活失败后异常的主动回复方法及其相关装置。这些技术方案解决问题的原理相同或相似,在以下具体实施例的介绍中,某些重复之处可能不再赘述,但应视为这些具体实施例之间已有相互引用,可以相互结合。
无线通信系统中,设备可分为提供无线网络服务的设备和使用无线网络服务的设备。提供无线网络服务的设备是指那些组成无线通信网络的设备,可简称为网络设备(network equipment),或网络单元(network element)。网络设备通常归属于运营商(如中国移动和Vodafone)或基础设施提供商(如铁塔公司),并由这些厂商负责运营或维护。网络设备还可进一步分为无线接入网(radio access network,RAN)设备以及核心网(core network,CN)设备。典型的RAN设备包括基站(base station,BS)。
应理解,基站有时也可以被称为无线接入点(access point,AP),或发送接收点(transmission reception point,TRP)。具体地,基站可以是5G新无线电(new radio,NR)系统中的通用节点B(generation Node B,gNB),4G长期演进(long term evolution,LTE)系统的演进节点B(evolutional Node B,eNB)。
使用无线网络服务的设备通常位于网络的边缘,可简称为终端(terminal)。终端能够与网络设备建立连接,并基于网络设备的服务为用户提供具体的无线通信业务。应理解,由于终端与用户的关系更加紧密,有时也被称为用户设备(user equipment,UE),或订户单元(subscriber unit,SU)。此外,相对于通常在固定地点放置的基站,终端往往随着用户一起移动,有时也被称为移动台(mobile station,MS)。此外,有些网络设备,例如中继节点(relay node,RN)或者无线路由器等,由于具备UE身份,或者归属于用户,有时也可被认为是终端。
具体地,终端可以是移动电话(mobile phone),平板电脑(tablet computer),膝上型电脑(laptop computer),可穿戴设备(比如智能手表,智能手环,智能头盔,智能眼镜),以及其他具备无线接入能力的设备,如智能汽车,各种物联网(internet of thing,IOT)设备,包括各种智能家居设备(比如智能电表和智能家电)以及智能城市设备(比如安防或监控设备,智能道路交通设施)等。
为了便于表述,本申请中将以基站和终端为例,详细说明本申请实施例的技术方案。
图1为本申请实施例提供的一种无线通信系统的结构示意图。如图1所示,无线通信系统包括终端和基站。按照传输方向的不同,从终端到基站的传输链路记为上行链路(uplink,UL),从基站到终端的传输链路记为下行链路(downlink,DL)。相类似地,上行链路中的数据传输可简记为上行数据传输或上行传输,下行链路中的数据传输可简记为下行数据传输或下行传输。
该无线通信系统中,基站可通过集成或外接的天线设备,为特定地理区域提供通信覆盖。位于基站的通信覆盖范围内的一个或多个终端,均可以接入基站。一个基站可以管理一个或多个小区(cell)。每个小区具有一个身份证明(identification),该身份证明也被称为小区标识(cell identity,cell ID)。从无线资源的角度看,一个小区是下行无线资源,以及与其配对的上行无线资源(非必需)的组合。
应理解,该无线通信系统可以遵从3GPP的无线通信标准,也可以遵从其他无线通信标准,例如电气电子工程师学会(Institute of Electrical and Electronics Engineers,IEEE)的802系列(如802.11,802.15,或者802.20)的无线通信标准。图1中虽然仅示出了一个基站和一个终端,该无线通信系统也可包括其他数目的终端和基站。此外,该无线通信系统还可包括其他的网络设备,比如核心网设备。
终端和基站应知晓该无线通信系统预定义的配置,包括系统支持的无线电接入技术(radio access technology,RAT),以及系统规定的无线资源,比如无线电频段及载波。载波是符合系统规定的一段频率范围。这段频率范围可由载波的中心频率(记为载频)和载波的带宽共同确定。这些系统预定义的配置可作为无线通信系统的标准协议的一部分,或者通过终端和基站间的交互确定。无线通信系统的标准协议的内容,可能会预先存储在终端和基站的存储器中,和/或,体现为终端和基站的硬件电路或软件代码。
该无线通信系统中,终端和基站支持一种或多种相同的RAT,例如5G NR,4G LTE,或未来演进系统的RAT。具体地,终端和基站采用相同的空口参数、编码方案和调制方案等, 并基于系统规定的无线资源相互通信。其中,空口参数是用于描述空口特征的参数。在英文中,空口参数有时也被称为numerology。空口参数可包括子载波间隔(subcarrier spacing,SC),也可包括循环前缀(cyclic prefix,CP)。该无线通信系统可支持多种不同空口参数,这些空口参数可作为标准协议的一部分。
在不同类型的基站协同组网时,由于单个节点的带宽资源和覆盖范围有限,因此集中多个小区或者节点的无线资源来为终端提供服务,从而满足用户对容量和覆盖范围的更高需求。这种集中多个小区或节点的无线资源来为用户提供服务的方式称为多连接。多连接包括载波聚合、双连接等等。
其中,双连接技术即终端在一个区域内可能接收到两个基站传来的信号,通过基站之间的协同调度进行资源传送有助于实现用户性能提升,对用户总体吞吐量和切换时延都有一定的帮助。
如今,随着技术的发展,移动通信经历了多代发展,现在处于第五代(5Generation,5G)移动通信系统。在移动通信网络从第四代(4Generation,4G)向第五代演进的过程中,无线接入网和核心网并非同步进行演进,因此系统中同时存在5G无线接入网(Next Generation RAN,NG-RAN)、5G核心网(Next Generation Core,NGC)、4G无线接入网(Evolved Universal Terrestrial Radio Access,E-UTRA)和4G核心网(Evolved Packet Core,EPC)。由于5G网络部署是一个渐进的过程,所以在完全利用5G网络替换现有的4G网络架构之前,这种双连接机制会长期存在。而这种在E-UTRA和NR节点之间或两个NR节点之间的双连接的网络架构,也被称为多模双连接(Multi-Radio Dual Connectivity,MR-DC)技术。
图2为本申请实施例提供的双连接场景示意图,如图2所示,包括终端21、主节点22(Master Node,MN)和辅节点24(Secondary Node,SN)。其中,主节点22是为终端21与核心网的通信提供控制面连接的无线接入节点,通过控制平面接口S1-MME实现与移动性管理实体(MME)的连接。相对应地,辅节点24是与核心网没有控制面连接的、仅为终端21提供额外资源的无线接入节点。
每个节点与一组服务小区关联,主节点22对应于主小区组23(Master Cell Group,MCG),辅节点对应于辅小区组25(Secondary Cell Group,SCG)。其中,MCG23又包括主小区(Primary Cell,PCell)和可选的一个或多个辅小区(Secondary Cell,SCell);SCG25包括辅助主小区(Primary Secondary Cell,PSCell)和可选的一个或多个Scell。上述PCell和PSCell也可统称为特殊小区(Special Cell,SpCell)。
终端21被配置为,其使用的资源是通过非理想回程连接的两个节点22、24来提供,其中一个节点提供NR接入,另一个节点提供E-UTRA或NR接入。此外,由前可知,核心网也有NGC与EPC的区别,因此,多模双连接主要可以分为以下四种:
1、演进的通用陆基无线接入及新空口的双连接模式(E-UTRA-NR dual connectivity,EN-DC)。在该模式下,终端21连接的主节点22为一个eNB,辅节点24为一个en-gNB。主节点22通过S1接口与核心网EPC相连,通过X2接口与辅节点24相连。辅节点24可以通过S1-U接口与EPC连接,通过X2-U接口与其他en-gNB连接。
2、NR-E-UTRA双连接(NE-DC)。在该模式下,终端21连接的主节点22为一个gNB,辅节点24为一个ng-eNB。主节点22与核心网NGC相连,且可以通过Xn接口与辅节点24相连。
3、NG-RAN E-UTRA-NR双连接(NGEN-DC)。在该模式下,终端21连接的主节点22 为一个ng-eNB,辅节点24为一个gNB。主节点22与核心网NGC相连,还可以通过Xn接口与辅节点24相连。
4、NR-NR双连接(NR-DC)。在该模式下,终端21连接的主节点22为一个gNB,辅节点24也为一个gNB。主节点22通过NG接口与核心网NGC相连,还通过Xn接口与辅节点24相连。
下述介绍与后续实施例以EN-DC模式为主要场景展开,其中,该模式下,主节点为4G基站eNB,可以向终端下传控制面消息和用户面消息,辅节点为5G基站gNB,作为额外的无线电承载资源,可以在主节点的指示下向终端发送消息,该消息包括控制面消息和用户面消息,该消息都来自主节点。
应理解,下述实施例方法也可拓展至其他MR-DC模式,用以解决相同的技术问题。
在EN-DC中,UE连接两个小区组,分别为MCG和SCG,其中又各自有一个主小区组(对应主节点eNB)和可能存在的多个辅小区组(对应辅节点gNB)。由于小区组中又可以分为主小区与辅小区,因此,UE连接的多个小区又可以分为以下三类:MCG中的一个主小区PCell,SCG中的一个主辅小区PSCell,和分属各组的、可能存在的、一个或多个辅小区SCell。
当终端在移动时,会从一个小区的覆盖范围进入另一个小区的覆盖范围,因而需要进行切换。在5G中,为增强终端移动性,引入条件切换(Conditional Handover,CHO)技术。
条件切换是网络为终端侧配置切换条件,条件切换的使用由网络决定,终端侧评估切换条件何时有效,且可以支持一个或多个候选小区的条件切换配置。CHO的配置包含由候选目标节点生成的CHO候选小区配置,以及由源节点生成的执行条件,通过源节点RRC连接重配消息下发给终端。
条件切换的流程包括切换准备、切换执行和切换完成三个阶段。当UE进入小区边界区域时,UE基于源节点配置测量上报,源节点收到UE上报后决定是否配置使用CHO。源节点决定使用CHO的情况下,向候选目标节点发送切换请求,并在收到条件请求确认后向UE下发第一RRC连接重配消息,所述第一RRC连接重配消息携带候选目标小区的同步信息和条件辅助主小区变更的触发条件。UE在接收到条件切换配置时开始评估执行条件,当其满足一个或多个CHO执行条件时,UE切换到目标小区。之后目标小区节点通知源节点,UE切换成功,源节点向其他候选目标节点发送条件切换取消消息,用于取消其他候选目标节点的条件切换准备。
图3为本申请实施例提供的简化的CHO流程示意图,其中UE代表终端设备,NW代表网络,包括主节点与辅节点,也可以通过指代节点对应的小区与小区组,前述都统称为网络。所述CHO流程示意图包含以下步骤:
步骤301、网络配置UE测量流程后,UE根据测量的配置与结果进行上报。
步骤302、网络决定使用CHO,CHO的使用可以基于测量上报,也可以进基于gNB的决定。
步骤303、网络进行CHO切换准备,主要包括选择候选小区、为UE分配资源。
步骤304、网络向UE发送RRC连接重配消息,所述RRC连接重配消息包含CHO候选小区的配置和CHO执行条件。所述CHO执行条件可以由一个或两个触发条件组成。
步骤305、UE向所述源gNB发送RRC重配完成消息,用于指示步骤304中的RRC连 接重配消息的成功接收与应用。
步骤306、UE在接收到CHO配置后,并开始评估候选小区的CHO执行条件。
步骤307、UE根据CHO评估条件,选出目标小区,并向目标小区进行接入。其中,目标小区为前述候选小区之一。
步骤308、UE完成与候选小区的同步后,向网络发送RRC重配完成消息,所述RRC重配完成消息用于告知网络UE完成CHO流程。
步骤309、网络更新相关信息,完成CHO切换。
其中,步骤301到305对应于CHO流程的切换准备阶段,步骤306与307对应切换执行阶段,步骤308与309对应于切换完成阶段。
步骤303中,网络进行的CHO切换准备,主要为源节点向一个或多个候选节点下的一个或多个小区发送切换请求,这些小区就是之后的候选小区。源节点向每个候选小区发送CHO请求消息。
候选小区接收到CHO请求消息后,执行接纳控制流程,为UE分配资源。候选小区完成资源分配操作后,向源节点发送CHO切换请求响应消息,该CHO切换请求响应消息携带有CHO候选小区的配置信息。由于进行该CHO切换请求响应消息的是候选小区所属的候选节点,需要注意的是,每个候选节点需要为每个候选小区发送CHO切换请求响应消息。
步骤305中,UE在接收到步骤304中的RRC连接重配消息后,保持与网络(主要是CHO切换的源节点)的连接,在可以接受到来自网络的下传消息的情况下,开始评估候选小区的CHO执行条件。因此,在CHO的切换执行阶段中,UE可以接受来自网络的关于RRC连接配置的消息。
步骤307中,UE通过CHO执行条件,从候选小区中选出目标小区,并向其同步接入。该同步接入为随机接入流程。
步骤308中,UE在发送RRC重配完成消息后,CHO流程在UE处的流程结束。UE可以释放存储的CHO配置。
步骤309中,网络执行CHO信息更新,包括由目标节点向源节点发送切换成功消息,源节点告知目标节点UE的连接状态信息,并向其他候选节点发送CHO切换取消消息等。即,网络需要将UE的连接状态信息从源节点更新到目标节点,使核心网能将下行数据的路径切换到目标节点。此外,网络还需取消其他候选节点为UE预留的CHO资源,以及释放源节点保留的UE的信息,如UE的上下文。
基于上述流程,UE可以实现对主小区、主辅小区与辅小区的条件切换,增强移动性。当切换对象为主辅小区时,条件切换的流程也可以称之为,条件主辅小区节点变更(Conditional PSCell Change,CPC)流程。由于主辅小区对应到辅节点,因此CPC流程也可以被视作UE对辅节点的配置的变更。
在CPC流程中,网络中的主节点或辅节点都可为UE侧配置变更条件,当UE测量满足CPC变更条件时,UE与目标辅节点进行同步接入,继而释放源辅节点,完成辅节点的变更。CPC变更条件的配置可由主节点或辅节点触发,用于从源辅节点传输UE上下文和辅小区组配置到目标辅节点。
需要注意的是,承载有CPC变更条件的配置与候选小区组的信息的RRC连接重配消息可以由主节点发送,此消息由SRB1承载;此外,该消息也可以由辅节点发送,此时该消息由SRB3承载。UE在收到该RRC连接重配消息后,可以通过SRB承载辨认出发送方,并向 相应的节点发送RRC重配完成消息,用以响应RRC连接重配消息。在之后的实施例中,仅以主节点及其对应的主小区发送的RRC连接重配消息为例,但应理解,实施例也可以被拓展到由辅节点及其对应的辅助主小区发送。
图4为本申请实施例提供的一种辅节点激发的CPC流程示意图,参与此流程的主体分为UE和各小区,其中,从信令交互的执行对象的角度出发,所述小区可被理解为基站,而从网络的角度出发,所述小区也可被视为相应的主节点或辅节点;在这里,为了便于理解,以小区代称。CPC流程包含以下步骤:
步骤401、UE将测量数据上报到源PSCell。
步骤402、源PSCell决定发起CPC流程,CPC的发起可以基于测量数据,也可以基于PSCell的决定。
步骤403、源PSCell向PCell发送变更需求,通知PCell候选目标PSCell和可选的CPC条件。
步骤404、PCell发送添加请求,请求候选PSCell为UE分配资源。PCell发送的添加请求包括与候选PSCell有关的测量数据。
步骤405、候选PSCell收到PCell的添加请求之后,向PCell添加请求响应消息。
步骤406、PCell向UE发送RRC重配消息,包括CPC的触发条件和候选PSCell的同步信息。
步骤407、UE向PCell发送RRC重配完成消息,用于指示步骤406中RRC重配消息的成功接收与应用。
步骤408、PCell向源PSCell发送确认消息,用于告知源PSCell的添加请求过程成功或失败。
步骤409、PCell向候选PSCell发送重配完成消息,用于指示步骤406中向UE发送的RRC连接重配消息的成功。
步骤4010、当UE评估CPC条件满足时,通过随机接入同步到目标PSCell。
步骤4011、UE完成随机接入后向PCell发送RRC重配完成消息,用于指示CPC流程的完成。
步骤4012、目标PSCell向PCell发送主辅小区切换成功消息,告知PCell UE已经成功接入到目标PSCell。
步骤4013、PCell向源PSCell和候选PSCell发送辅节点释放请求,用于释放候选PSCell和源PSCell分配给UE的资源,源PSCell和候选PSCell收到后释放准备的资源。
步骤4014、源PSCell和候选PSCell向PCell发送释放请求确认消息,用于确认前一步中释放请求的收到以及资源释放完成。
其中,步骤401到409对应于CHO流程的切换准备阶段,步骤4010对应切换执行阶段,步骤4011到4014对应于切换完成阶段。
由上述流程可知,UE在接收来自PCell的RRC连接重配消息后,其中,RRC连接重配消息携带候选目标小区的同步信息和CPC的触发条件。UE更新上述信息与配置,待测量结果满足相关触发条件,自行启动条件切换流程。
UE在启动CPC流程后,应用目标PSCell的相关配置,更新目标PSCell的同步信息,通过随机接入流程与目标PSCell完成同步,之后向网络发送RRC重配完成消息,用于指示CPC流程的完成。
需要注意的是,当PCell接收RRC重配完成消息后、直至其接收第二条RRC重配完成 消息前,其无法得知UE是否启动了CPC流程。即,PCell在CPC流程完成后,才被UE和目标PSCell告知UE的CPC切换结果。而在此过程中,网络可能会通过PCell下发新的RRC连接重配消息到UE,其可以携带多个UE连接的任一小区(如源PSCell)的RRC配置信息,或携带指定的目标PSCell的RRC连接配置信息。其中,前者用于对源PSCell进行配置的更新,后者用于指示UE对指定的目标PSCell进行接入。而这一段时间,参见图4中,由冲撞期指代。
因此,UE在冲撞期内可能会接收到新的RRC连接重配消息,在现有技术中,UE推后对该消息的操作响应,直至完成CPC流程。之后,UE将应用此新的RRC连接重配消息携带的RRC连接配置信息。由于此新的RRC连接重配消息携带的是源PSCell的RRC连接配置信息或PCell指定的目标PSCell的RRC连接配置信息,可以理解,这些配置信息与UE完成CPC后小区的RRC配置信息极可能是不匹配的。UE在应用这些配置信息时,会将之叠加在已有的配置上。而此叠加操作是不合理的,且不一定能叠加成功。如果无法叠加成功,将造成UE保存参数失败,按协议将触发MCG重建,影响业务的连续性;而即使叠加成功,叠加后的参数也极可能是错误的。
此外,UE也可以丢弃该新的RRC连接重配消息,不应用其携带的关于小区的RRC连接配置信息。但由于UE必须在收到RRC连接重配消息后,向网络发送RRC重配完成消息。若UE不应用RRC连接配置信息,这将导致网络接收到不正确的RRC重配完成消息。在此情况下,网络会要求UE重建RRC连接,影响业务连续性,甚至释放UE上下文,导致业务中断。
即,现有技术中,PCell无法及时获悉UE切换PSCell的开始,其可能在任意时间下发新的RRC连接配置信息到UE,且该RRC连接配置信息可以是关于多个UE连接的任一小区,也可以是用于UE指定切换的目标辅助主小区。而UE必须等待CPC流程结束后,才能告知网络辅助主小区变更完成,而其在冲撞期内可能接收到来自网络的RRC连接新配置,并必须对其做出响应,而现有技术中,UE无论是应用该新配置还是不应用该新配置,都将大概率导致小区组的重建,影响业务连续性。
为解决上述问题,本申请实施例的总体思路如下:使UE在接收到新的RRC连接重配消息的情况下,能够自主中断CPC流程,优先应用该RRC连接重配消息携带的目标PSCell的配置信息,从而避免网络下发的配置信息与UE侧自主切换的配置信息冲突的情况,优化业务体验。以下实施例都可以兼容现有标准协议,且作为产品实现方案。
如图5所示,为本申请实施例提供的一种条件PSCell变更流程示意图。此流程中,UE始于接收来自网络的第一RRC连接重配消息,所述第一RRC连接重配消息携带候选目标小区的同步信息和条件辅助主小区变更的触发条件,从而在触发条件被激活时,启动条件辅助主小区变更。此流程示意图包括以下步骤:
步骤501、接收来自网络的RRC连接重配消息,所述RRC连接重配消息携带候选目标小区的同步信息和条件辅助主小区变更的触发条件。
步骤502、向所述网络发送RRC重配完成消息,所述RRC重配完成消息用于响应步骤501中的RRC连接重配消息。
步骤503、评估CPC条件满足的情况下,启动CPC流程。
步骤504、在CPC过程中,接收来自所述网络的新的RRC连接重配消息,所述新的RRC连接重配置消息携带节点配置信息。
步骤505、向所述PCell发送RRC重配完成消息,所述RRC重配完成消息用于响应步骤504中的RRC连接重配消息。
步骤506、根据步骤504中的RRC连接重配消息中携带的所述目标辅助主小区信息情况,发送上行消息,用于指示目标辅助主小区切换成功与否。
网络在判断可以进行条件切换后,向UE下发RRC连接重配消息。UE接收该消息携带的候选目标辅助主小区的同步信息和CPC的触发条件,在触发条件被满足的情况下选定目标辅助主小区,自主启动CPC流程,用于对目标辅助主小区尝试同步接入。
但在UE完成CPC流程前,由于其无法告知网络条件切换流程已开启,因此网络在不知道UE启动CPC的情况下,可以下发新的RRC连接重配消息,用于更新UE侧的RRC连接配置。
所述CPC过程中,也即前述的冲撞期,包括以下两种情况:
1、在UE执行CPC时、未发送RRC重配完成消息前,该RRC重配完成消息用于指示CPC流程完成。该情况下,包括的时间段有:UE评估CPC条件、UE向满足CPC条件的目标PSCell进行随机接入过程中,以及UE完成对前述PSCell的随机接入、发送第三RRC重配完成消息前。在这阶段的CPC流程执行中,UE可以依据其历史操作,对因为CPC而修改的RRC连接参数进行回退,使其回退到CPC启动前。在此情况下,UE通过中止CPC流程、回退RRC连接参数,使其可以叠加收到的RRC连接重配消息携带的信息。当所述信息为UE连接的任一小区(如源PSCell)相关时,可以避免参数叠加失败导致的MCG重建。而当该RRC连接重配消息中携带的为指定的目标PSCell的同步信息时,UE叠加RRC连接配置信息,并向指定的目标PSCell进行接入,而不是CPC流程决定的目标PSCell。
2、在UE执行完CPC流程、且发送RRC重配完成消息后的第一时长内,其中,所述第一时长小于主小区接收RRC重配完成消息并下发新的RRC配置的耗时,该RRC重配完成消息用于指示CPC流程完成。在该阶段,UE已完成对RRC连接配置的更新,因此无法进行参数回退。在此情况下,UE叠加该RRC重配完成消息携带的RRC连接配置信息,停止对CPC流程指示的目标PSCell的接入。
如上所述,该RRC连接重配消息可以用于更新UE与连接的任一小区的RRC连接配置,包括但不限于对测量的配置、信道状态信息配置等。上述配置都是基于原有的、未经CPC流程改变的配置情况进行叠加,因此会与UE启动条件切换后的目标小区的新配置冲突。此外,该RRC连接重配消息也可以携带网络指定的目标辅助主小区的配置信息,用于指示UE向所述指定的目标辅助主小区变更、与之同步接入。
当UE终止CPC流程,接收这个RRC连接重配消息,并在应用其携带的RRC连接配置信息后发送相应的RRC重配完成消息。之后,UE可以根据该RRC连接重配消息的内容来确认参数叠加的成功与否,并告知网络:
1、当RRC连接重配消息携带用于指示UE进行切换的目标PSCell相关的同步信息时,UE向目标PSCell发送的上行消息用于同步接入,即随机接入前导消息。
2、当RRC连接重配消息携带的信息不包括上述目标PSCell相关的同步信息,即该消息携带的信息用于修改与UE连接的任一小区(如源PSCell)相关的RRC连接配置信息时,UE向PCell发送SCG失败信息消息,所述SCG失败信息消息用于告知网络UE经历SCG失败、需要重建。
在上述情况中,UE在CPC流程完成前,接收RRC连接重配消息,其及时应用其配置,防止因为不采用或错误叠加该RRC连接重配消息携带的RRC连接配置信息,而导致相应的 RRC重配完成消息的发送出错,发送出错包括内容因不采用前述配置信息而有缺漏,进而导致网络释放资源、MCG小区重建。
如上所述,为了区别出该RRC连接重配消息是否携带目标PSCell相关的同步信息,需要对其中的字段进行判断。在RRC连接重配消息中,由于其是对UE与小区之间的RRC连接配置的修改,因此会包含对小区的指示性信息,该信息由小区组ID(cellGroupId)字段携带,用于指示为主小区组或辅小区组。
在该字段下,又有特殊小区配置(spCellconfig)字段,该spCellconfig为可选字段,所述特殊小区包括PCell和PSCell。对于PSCell的配置可见此字段中,此字段的结构如下:
其中,servCellIndex字段用于指示目标PSCell的服务小区ID。该字段为可选字段,当该RRC连接重配消息为关于辅小区组时才存在。具体地,当接收到的RRC的配置消息为对PSCell的重配时,其消息中必包含字段servCellIndex字段;当该消息携带的是对PCell的重配信息时,则不包含该字段。因此,可以通过查看接收到的RRC连接重配消息中,是否包含字段servCellIndex字段,来判断该RRC连接重配消息是针对PCell或PSCell的参数修改。若不包含,则是对PCell,否则是对PSCell的RRC连接重配。
由于RRC连接的重配并非仅包括切换情况下的、对新小区的接入,因此,为了区别出该情况,需要通过其后的reconfigurationWithSync字段来实现。该字段用于指示UE向目标spCell同步重配的参数。该字段在spCell更改、PSCell添加、PSCell SI更新和安全密钥更改的情况下,是强制的。reconfigurationWithSync字段携带对目标spCell的小区特定参数、随机接入信道等的具体配置,UE应用相关配置后,可以对目标spCell发起随机接入流程。值得注意的是,在进行MCG切换时,根据协议需要释放已有的SCG,此时可以通过所述字段携带已有的SCG的配置,进行新一次的随机接入,从而保持SCG配置不变。
因此,在本申请实施例中,选择查看接收到的RRC连接重配消息中,在cellGroupId字段指示的是辅小区组的情况下,是否包含reconfigurationWithSync字段,由此来判断该RRC连接重配消息是针对源辅助主小区或新的目标辅助主小区的参数修改。若不包含reconfigurationWithSync字段,则是对源辅助主小区;否则是对目标辅助主小区的连接重配,UE需要执行随机接入。
如图6所示,为本申请实施例提供的一种条件PSCell变更流程示意图,其中,UE在启动CPC流程后、发送用于指示CPC流程完成的RRC重配完成消息前,接收到一条RRC连接重配消息。此流程示意图包括以下步骤:
步骤601、接收来自PCell的RRC连接重配消息,所述RRC连接重配消息携带候选目标小区的同步信息和条件辅助主小区变更的触发条件。
步骤602、向所述PCell发送RRC重配完成消息,所述RRC重配完成消息用于响应步骤601中的RRC连接重配消息。
步骤603、评估CPC条件满足的情况下,启动CPC流程。
步骤604、接收来自所述PCell的RRC连接重配消息,所述RRC连接重配置消息携带小区的配置信息。
步骤605、撤销CPC配置,使RRC连接配置回到CPC流程启动前。
步骤606、向所述PCell发送RRC重配完成消息,所述RRC重配完成消息用于响应步骤604中的RRC连接重配消息。
步骤607、根据步骤604中RRC连接重配消息中携带的小区配置的信息情况,在该消息携带有目标PSCell的同步信息的情况下,向该目标PSCell进行随机接入。
上述步骤601至604可以参照步骤501至504,此处不再赘述。
在此流程中,UE在向CPC条件评估满足的目标PSCell接入前,接收到RRC连接重配消息。此时,该消息携带的RRC连接配置信息与UE自身、在CPC评估后改变的配置信息不一致,参数叠加不成功,会造成冲突,导致参数保存不成功。
如步骤605中,UE在接收到该RRC连接重配消息后,撤销CPC条件评估满足后执行的RRC连接配置信息更新。UE参考其在执行CPC过程中的操作历史记录,将对相关参数的操作(包括更改和释放)撤销,将上述参数恢复至CPC流程启动前的状态,即将参数从CPC指定的目标辅助主小区的配置内容改回CPC指定目标辅助主小区之前。之后,UE终止该CPC流程,释放相关CPC资源,不再向CPC评估后选择的候选辅助主小区进行接入。UE不通知PCell关于此次CPC流程的执行失败。
之后,如步骤606所示,UE依照步骤604中的RRC连接重配消息,应用其携带的全部RRC连接配置信息,并在应用完成后发送RRC重配完成消息,防止PCell因为没收到该RRC重配完成消息而导致异常操作,例如释放UE上下文。
步骤607中,UE判断步骤604中的RRC连接重配消息是否携带的小区配置的信息情况,即是否携带用于接入由PCell指定切换的目标小区的配置信息。根据上述介绍,UE可以通过判断该消息是否为辅小区组情况下(通过cellGroupId字段)的、reconfigurationWithSync的存在情况,来执行该判断。
其中,只有当前述两个字段同时存在,才是对指定切换的目标PSCell的接入的配置,UE可以向该目标PSCell启动随机接入流程,包括向其发送随机接入前导消息,可以指示切换程序的启动。
如果前述两个字段不同时存在,UE需要发起SCG失败流程,向PCell发送SCG失败消息,该消息用于告知网络UE经历了SCG失败,希望网络指示重新建立SCG。即,UE通过发送SCG失败消息告知网络UE的失败的切换结果。
根据上述方案,UE在CPC流程中接收到RRC连接重配消息、导致参数配置发生对冲的情况下,进行CPC启动后操作的撤销,从而响应第二RRC连接重配消息,配置其携带的参数信息。这避免了由于不响应该RRC连接重配消息可能导致的UE上下文释放,以及不将参数改回原有RRC连接的情况下、直接叠加该消息携带的参数导致UE保存失败,进一步带来业务中断以及MCG重建。
此外,通过判断RRC连接重配消息的重配对象,UE发送不同的上行消息到网络,从而 在RRC连接重配消息不指示切换的目标PSCell时,通过主动触发SCG失败流程来避免参数叠加失败导致的MCG重建。
因此,使用该方法,无论UE在CPC过程中收到的RRC连接重配消息是否携带指示切换的目标PSCell的同步信息,都可以应用该消息携带的RRC连接配置信息,并向网络发送正确的RRC重配完成消息,避免小区组的重建以及业务中断。
如图7所示,为本申请实施例提供的另一种CPC流程示意图,其中,UE在启动CPC流程后、发送用于指示该CPC流程完成的RRC重配完成消息前,接收到RRC连接重配消息。此流程示意图包括以下步骤:
步骤701、接收来自PCell的RRC连接重配消息,所述RRC连接重配消息携带候选目标小区的同步信息和CPC的触发条件。
步骤702、向所述PCell发送RRC重配完成消息,所述RRC重配完成消息用于响应步骤701中的RRC连接重配消息。
步骤703、评估CPC条件满足的情况下,启动CPC流程。
步骤704、向所述PCell发送RRC连接重配消息,所述RRC连接重配消息用于指示CPC流程完成。
步骤705、接收来自所述PCell的RRC连接重配消息,所述RRC连接重配置消息携带小区配置信息。
步骤706、向所述PCell发送RRC重配完成消息,所述RRC重配完成消息用于响应步骤705中的RRC连接重配消息。
步骤707、根据步骤705中的RRC连接重配消息中携带的目标PSCell信息情况,在该消息不携带有目标PSCell的同步信息的情况下,向PCell发送辅小区组失败信息消息,用于指示目标PSCell切换失败。
上述步骤701至703可以参照步骤501至503,此处不再赘述。
UE在向CPC条件评估满足的目标PSCell完成接入后,向PCell发送RRC重配完成消息,如步骤704所示,用以指示CPC流程完成。UE在发送完该消息后的第一时长内接收到来自PCell的一条RRC连接重配消息,该第一时长小于PCell接收前述的RRC重配完成消息后、再下发一条RRC配置消息的总时间,如步骤705所示。即,UE已完成CPC流程、完成与CPC指定的目标PSCell的上行同步的情况下,接收到来自PCell的RRC连接重配消息。两者指示的小区不一致,造成参数对冲。其中,第一时长的具体数值可以取基站进行上述操作的经验值,范围可以在30至50毫秒之间。
在此情况下,由于UE发送了用于指示CPC流程完成的RRC重配完成消息,因此对UE来说CPC流程已结束,无法再撤销由该流程带来的RRC连接配置的改动。基于此,UE必须将收到的RRC连接重配消息携带的RRC连接配置内容叠加至改动后的相关参数之上,然后如步骤706所示发送RRC重配完成消息,用于响应该RRC连接重配消息。
步骤707中,UE判断该RRC连接重配消息是否携带的小区配置的信息情况,即是否携带用于接入由PCell指定切换的目标小区的配置信息。根据上述介绍,UE可以通过判断该消息是否为辅小区组情况下(通过cellGroupId字段)的、reconfigurationWithSync的存在情况,来执行该判断。
当前述两个字段不同时存在,UE需要发起SCG失败流程,向PCell发送SCG失败消息,该消息用于告知网络UE经历了SCG失败,希望网络指示重新建立SCG。即,UE通过发送 SCG失败消息告知网络UE的失败的切换结果。
根据上述方案,UE在接收到的RRC连接重配消息非指定目标PSCell的配置、且参数修改无法撤回、RRC连接配置不应叠加的情况下,主动触发辅小区组失败流程,用SCG的重建来避免参数叠加失败导致的MCG重建,让网络参与之后SCG的重建,从而减小业务恢复的时延。
除以上兼容现有标准协议的办法,还可以通过对现有协议进行改进的方式解决参数对冲的问题。
如图8所示,为本申请实施例提供的另一种CPC流程示意图,包括以下步骤:
步骤801、接收来自PCell的RRC连接重配消息,所述RRC连接重配消息携带候选目标小区的同步信息和条件辅助主小区变更的触发条件。
步骤802、向所述PCell发送RRC重配完成消息,所述RRC重配完成消息用于响应步骤601中的RRC连接重配消息。
步骤803、评估CPC条件满足的情况下,启动CPC流程。
步骤804、向PCell发送CPC执行通知消息,用于指示CPC流程的启动。
步骤805、接收来自所述PCell的CPC执行响应消息,用于指示CPC执行通知消息的接收成功。
步骤806、在完成CPC流程后,向PCell发送RRC重配完成消息,用于指示CPC流程的完成。
其中,在步骤805后,UE接收到CPC执行响应消息后,开始执行CPC流程,进行相关配置信息的修改。同时,PCell对应的主节点保持UE的配置不做改变,延后处理来自核心网或辅节点的、要求UE改变RRC连接配置信息的消息。其中,主节点保持UE的配置直到接收到步骤806中的RRC重配完成消息。即,网络在UE执行CPC流程的过程中,不对UE的RRC连接配置做任何改变。若网络需要对UE进行RRC连接的重配,等待被UE通过RRC重配完成消息告知CPC流程结束后,再向UE发送RRC连接重配消息,避免在CPC过程中发送该消息导致参数对冲。
由此可知,UE通过在启动CPC流程前,增加了与网络的握手流程(即通知网络CPC流程启动并等待网络回应),从而避免网络在CPC过程中发送RRC连接重配消息,解决了参数对冲的问题。
除了上述在不中断UE执行CPC的过程的情况下,增加新的信令消息的解决方法,还可以通过增加协议通路的方法解决参数对冲的问题。
如图9所示,为本申请实施例提供的另一种CPC流程示意图,包括以下步骤:
步骤901、接收来自PCell的RRC连接重配消息,所述RRC连接重配消息携带候选目标小区的同步信息和CPC的触发条件。
步骤902、向所述PCell发送RRC重配完成消息,所述RRC重配完成消息用于响应步骤701中的RRC连接重配消息。
步骤903、评估CPC条件满足的情况下,启动CPC流程。
步骤904、接收来自所述PCell的RRC连接重配消息,所述RRC连接重配置消息携带小区的配置信息。
步骤905、向所述PCell发送RRC重配完成消息,所述RRC重配完成消息用于指示CPC 流程结束。
步骤906、向目标PSCell发送RRC重配完成消息,所述RRC重配完成消息用于指示CPC流程结束。
步骤907、向所述目标PSCell进行随机接入。
步骤908、向所述PCell发送RRC重配完成消息,用于指示参数叠加成功的小区组,所述参数由步骤904中的RRC连接重配消息携带。
步骤909、接收来自所述PCell的RRC连接重配消息,所述RRC连接重配消息携带的信息用于指示参数叠加失败的小区组的操作。
如前所述,步骤904中,UE收到的RRC连接重配消息,该消息能携带的小区配置信息包括对主小区组的小区的配置信息,以及对辅小区组的小区的配置信息。由于UE执行CPC流程后,修改的RRC连接配置信息主要关于辅小区组中的PSCell。而当该消息只包含主小区组的小区的配置信息时,参数叠加的行为发生在与主小区组相关的参数上,受影响的可能性较低。而当该消息包含辅小区组的小区的配置信息时,参数叠加的行为发生在与辅小区组相关的参数上,而这些参数因CPC流程而被改变的可能性很大,因此会发生参数叠加失败,导致业务的中断。
对该RRC连接重配消息,UE先完成CPC流程,即完成对CPC流程选择的目标PSCell的同步接入(步骤905到907)。之后,UE再根据前述RRC连接重配消息携带的小区配置信息进行参数叠加。
当该RRC连接重配消息携带辅小区组的小区的配置信息时,UE在步骤908中向PCell发送的RRC重配完成消息中,增加一条协议通路,用于通知PCell UE仅生效了步骤904中RRC连接重配消息携带的主小区组的小区的配置信息,其具体实现方式可以考虑通过4G的RRC重配完成消息中增加相应的指示字段。
通过该指示字段,PCell及其对应的主节点,可以得知UE生效了主小区组的小区的配置信息,而辅小区组的小区的配置信息生效失败。由此,PCell下发新的RRC连接重配消息来指示UE处理辅小区组的小区的配置,例如释放已有的辅小区组资源并同时进行新的辅小区组的建立、或对主小区组和辅小区组进行整体重配置。其中,前者的实现方式可以通过该RRC连接重配消息携带的针对辅小区组的ReleaseAndAdd字段实现,后者可以通过该消息携带的fullConfig字段实现。
由此,UE可以通过新的协议通路,告知PCell(即其对应的主节点及网络)UE发生了参数对冲,从而通过网络的介入,来避免参数叠加失败导致的小区组的重建,增强业务的连续性。
下面介绍本申请实施例提供的一种无线通信装置。
参考图10,为本申请实施例提供的一种无线通信装置的示意性框图,该通信装置1000包括处理单元1010和收发单元1020,两者通过线路相连。该无线通信装置用于实现上述各实施例中对应终端的各个步骤:
处理单元1010用于控制收发单元1020进行与网络的通信;用于在感知到业务需求时,控制收发单元启动随机接入流程,从而与网络建立RRC连接。
收发单元1020,用于接收第一RRC连接重配消息,发送第一RRC重配完成消息,接收来自主小区的第二RRC连接重配消息,向所述主小区发送第二RRC重配完成消息。
在一种可能的实现方法中,收发单元1020还用于当所述第二RRC连接重配消息携带的 小区配置信息包括目标PSCell的同步信息时,向所述目标辅助主小区发起随机接入过程。
在一种可能的实现方法中,收发单元1020还用于当所述第二RRC连接重配置消息携带的小区配置信息不包括目标辅助主小区的配置信息时,向所述主小区发送辅小区组失败信息消息。
在一种可能的实现方法中,收发单元1020还用于在向所述主小区发送第三RRC重配完成消息之前,接收到所述第二RRC连接重配消息,所述第三RRC重配完成消息用于指示条件辅助主小区变更流程的结束。
在一种可能的实现方法中,收发单元1020还用于在向所述主小区发送第三RRC重配完成消息之前,接收到所述第二RRC连接重配消息。
在一种可能的实现方法中,收发单元1020还用于在向所述主小区发送第三RRC重配完成消息后的第一时长内,接收到所述第二RRC连接重配消息。
在一种可能的实现方法中,收发单元1020还用于在向所述主小区发送第三RRC重配完成消息后的第一时长内,接收到所述第二RRC连接重配消息;其中,所述第一时长小于所述主小区接收RRC重配完成消息并下发新的RRC配置的耗时。
在一种可能的实现方法中,处理单元1010还包括定时器,并用于在所述收发单元发送所述第三RRC连接重配消息后启动定时器,所述定时器的时长为所述第一时长。
在一种可能的实现方法中,处理单元1010还包括用于确定所述第二RRC连接重配置消息携带的小区配置信息中是否包括目标PSCell的同步信息。
在以上各实现方式中,收发单元1020也可以分为一个接收单元和一个发送单元,各自具备接收和发送的功能,这里不作限定。
可选地,上述通信装置还可以包括存储单元,该存储单元用于存储数据或者指令(也可以称为代码或者程序),上述各个单元可以和存储单元交互或者耦合,以实现对应的方法或者功能。本申请实施例中的耦合是装置、单元或模块之间的间接耦合或通信连接,可以是电性,机械或其它的形式,用于装置、单元或模块之间的信息交互。
本申请实施例中,通信装置中单元的划分仅仅是一种逻辑功能的划分,实际实现时可以全部或部分集成到一个物理实体上,也可以物理上分开。且通信装置中的单元可以全部以软件通过处理元件调用的形式实现;也可以全部以硬件的形式实现;还可以部分单元以软件通过处理元件调用的形式实现,部分单元以硬件的形式实现。例如,各个单元可以为单独设立的处理元件,也可以集成在通信装置的某一个芯片中实现,此外,也可以以程序的形式存储于存储器中,由通信装置的某一个处理元件调用并执行该单元的功能。此外这些单元全部或部分可以集成在一起,也可以独立实现。这里所述的处理元件又可以称为处理器,可以是一种具有信号的处理能力的集成电路。在实现过程中,上述方法的各步骤或以上各个单元可以通过处理器元件中的硬件的集成逻辑电路实现或者以软件通过处理元件调用的形式实现。
在一个例子中,以上任一通信装置中的单元可以是被配置成实施以上方法的一个或多个集成电路,例如:一个或多个特定集成电路(application specific integrated circuit,ASIC),或,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),或这些集成电路形式中至少两种的组合。再如,当通信装置中的单元可以通过处理元件调度程序的形式实现时,该处理元件可以是通用处理器,例如中央处理器(central processing unit,CPU)或其它可以调用程序的处理器。再如,这些单元可以集成在一起,以片上系统(system-on-a-chip,SOC)的形式实现。
参考图11,为本申请实施例提供的一种无线通信装置的结构示意图,该无线通信装置可以为无线通信装置或网络设备,也可以为芯片或电路,比如可设置于无线通信装置的芯片或电路,再比如可设置于网络设备内的芯片或电路,用于实现以上方法实施例中的方法。如图11所示,该通信装置1100包括:处理器1110和收发器1130,可选地,该通信装置1100还包括存储器1120,在图中以虚线框表示此存储器1120非必备。收发器1130用于实现与其他设备进行通信。其中,处理器1110、存储器1120和收发器1130通过总线实现连接与数据通信。
应理解,上述处理器1110可以是一个芯片。例如,该处理器1110可以是现场可编程门阵列(field programmable gate array,FPGA),可以是专用集成芯片(application specific integrated circuit,ASIC),还可以是系统芯片(system on chip,SoC),还可以是中央处理器(central processor unit,CPU),还可以是网络处理器(network processor,NP),还可以是数字信号处理电路(digital signal processor,DSP),还可以是微控制器(micro controller unit,MCU),还可以是可编程控制器(programmable logic device,PLD)或其他集成芯片。
实现过程中,上述方法的各步骤可以通过处理器1110中的硬件的集成逻辑电路或者软件形式的指令完成。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成,或者用处理器1110中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器,闪存、只读存储器,可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器1120,处理器1110读取存储器1120中的信息,结合其硬件完成上述方法的步骤。
具体的,图10中的处理单元1010的功能及其实现过程可以通过图11所示的通信装置1100中的处理器1110调用存储器1120中存储的计算机可执行指令来实现。或者,图10中的收发单元1020的功能/实现过程可以通过图11中所示的通信装置1100中的收发器1130来实现。
应注意,本申请实施例中的处理器1110可以是一种集成电路芯片,具有信号的处理能力。在实现过程中,上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(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。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。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。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成,或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器,闪存、只读存储器,可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器,处理器读取存储器中的信息,结合其硬件完成上述方法的步骤。
在本申请实施例中,存储器1120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(dynamic RAM,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)。应注意,本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
该通信装置1100对应上述方法中的无线通信装置的情况下,该通信装置可以包括处理器1110、收发器1130和存储器1320。该存储器1120用于存储指令,该处理器1110用于执行该存储器1120存储的指令,可以实现如上图6至图7中所示的任一项或任多项对应的方法中无线通信装置所执行的步骤。
本领域普通技术人员可以理解:本申请实施例中涉及的第一、第二等各种数字编号仅为描述方便进行的区分,并不用来限制本申请实施例的范围,也表示先后顺序。“和/或”,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。字符“/”一般表示前后关联对象是一种“或”的关系。“至少一个”是指一个或者多个。至少两个是指两个或者多个。“至少一个”、“任意一个”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、种),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。“多个”是指两个或两个以上,其它量词与之类似。
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。
本申请实施例提供的技术方案可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时,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。在计算机上加载和执行所述计算机程序指令时,全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、终端设备、网络设备、人工智能设备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(例如同轴电缆、光纤、数字用户线(DSL))或无线(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括一个或多个可用介质集成的服务器、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(例如固态硬盘(solid state disk,SSD))等。
在本申请实施例中,各实施例之间可以相互引用,例如方法实施例之间的方法和/或术语可以相互引用,例如装置实施例之间的功能和/或术语可以相互引用,例如装置实施例和方法实施例之间的功能和/或术语可以相互引用。
以上所述,仅为本发明的具体实施方式,但本发明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发明揭露的技术范围内,可轻易想到的变化或替换,都应涵盖在本发明的保护范围之内。因此,本发明的保护范围应以所述权利要求的保护范围为准。
Claims (19)
- 一种无线通信方法,其特征在于,包括:接收第一无线链路控制RRC连接重配消息,所述第一RRC连接重配置消息携带候选辅助主小区的同步信息和条件辅助主小区变更的触发条件信息;发送第一RRC重配完成消息,所述第一RRC重配完成消息用于响应所述第一RRC连接重配消息;在执行条件辅助主小区变更过程中,接收来自主小区的第二RRC连接重配消息,所述第二RRC连接重配置消息携带小区配置信息;向所述主小区发送第二RRC重配完成消息,所述第二RRC重配完成消息用于响应所述第二RRC连接重配消息;当所述第二RRC连接重配消息携带的小区配置信息包括目标辅助主小区的配置信息时,向所述目标辅助主小区发起随机接入过程;其中,所述配置信息用于指示向目标辅助主小区进行同步。
- 根据权利要求1所述的方法,其特征在于,还包括:当所述第二RRC连接重配置消息携带的小区配置信息不包括目标辅助主小区的配置信息时,向所述主小区发送辅小区组失败信息消息;其中,所述配置信息用于指示向目标辅助主小区进行同步。
- 根据权利要求1至2中任一所述的方法,其特征在于:所述执行条件辅助主小区变更过程中,接收来自所述主小区的第二RRC连接重配消息,包括:在向所述主小区发送第三RRC重配完成消息之前,接收到所述第二RRC连接重配消息,所述第三RRC重配完成消息用于指示条件辅助主小区变更流程的结束。
- 根据权利要求1至2中任一所述的方法,其特征在于:所述执行条件辅助主小区变更过程中,接收来自所述主小区的第二RRC连接重配消息,包括:在向所述主小区发送第三RRC重配完成消息后的第一时长内,接收到所述第二RRC连接重配消息。
- 根据权利要求4所述的方法,其特征在于:所述第一时长小于所述主小区接收RRC重配完成消息并下发新的RRC配置的耗时。
- 根据权利要求5所述的方法,其特征在于:所述第一时长为固定值,其数值范围在30到50毫秒。
- 根据权利要求1至6中任一所述的方法,其特征在于,还包括:根据所述第二RRC重配完成消息是否包含指示辅小区组的序号与ReconfigurationWithSync字段,确定所述第二RRC连接重配置消息携带的小区配置信息中是 否包括目标辅助主小区的同步信息。
- 一种无线通信装置,其特征在于,包括:处理单元和收发单元;其中,所述处理单元用于控制所述收发单元,所述收发单元用于:接收第一RRC连接重配消息,所述第一RRC连接重配置消息携带候选辅助主小区的同步信息和条件辅助主小区变更的触发条件信息;发送第一RRC重配完成消息,所述第一RRC重配完成消息用于响应所述第一RRC连接重配消息;在执行条件辅助主小区变更过程中,接收来自主小区的第二RRC连接重配消息,所述第二RRC连接重配置消息携带小区配置信息;向所述主小区发送第二RRC重配完成消息,所述第二RRC重配完成消息用于响应所述第二RRC连接重配消息;当所述第二RRC连接重配消息携带的小区配置信息包括目标辅助主小区的配置信息时,向所述目标辅助主小区发起随机接入过程。
- 根据权利要求8所述的装置,其特征在于:所述收发单元用于当所述第二RRC连接重配置消息携带的小区配置信息不包括目标辅助主小区的配置信息时,向所述主小区发送辅小区组失败信息消息。
- 根据权利要求8至9中任一所述的装置,其特征在于:所述收发单元用于所述执行条件辅助主小区变更过程中,接收来自所述主小区的第二RRC连接重配消息,包括:所述收发单元用于在向所述主小区发送第三RRC重配完成消息之前,接收到所述第二RRC连接重配消息,所述第三RRC重配完成消息用于指示条件辅助主小区变更流程的结束。
- 根据权利要求8至9中任一所述的装置,其特征在于:所述收发单元用于所述执行条件辅助主小区变更过程中,接收来自所述主小区的第二RRC连接重配消息,包括:所述收发单元用于在向所述主小区发送第三RRC重配完成消息后的第一时长内,接收到所述第二RRC连接重配消息。
- 根据权利要求11中任一所述的装置,其特征在于:所述收发单元还用于在向所述主小区发送第三RRC重配完成消息后的第一时长内,接收到所述第二RRC连接重配消息;其中,所述第一时长小于所述主小区接收RRC重配完成消息并下发新的RRC配置的耗时。
- 根据权利要求12中任一所述的装置,其特征在于:所述处理单元还用于在所述收发单元发送所述第三RRC连接重配消息后启动定时器,所述定时器的时长为所述第一时长;其中,所述第一时长小于所述主小区接收RRC重配完成消息并下发新的RRC配置的耗时。
- 根据权利要求13所述的方法,其特征在于:所述处理单元还用于配置所述定时器的所述第一时长为一个固定值,其数值范围在30到50毫秒。
- 根据权利要求9至14中任一所述的装置,其特征在于:所述处理单元还用于根据所述第二RRC重配完成消息是否包含指示辅小区组的序号与ReconfigurationWithSync字段,确定所述第二RRC连接重配置消息携带的小区配置信息中是否包括目标辅助主小区的同步信息。
- 一种无线通信装置,其特征在于,包括:处理器和存储器,其中,所述存储器用于存储程序指令,所述处理器用于执行所述存储器中的程序指令,以实现如权利要求1至8中的任一所述方法。
- 一种无线通信装置,其特征在于,包括:处理电路和接口电路;其中,所述接口电路用于与所述无线通信装置外部的存储器耦合,并为所述处理电路访问所述存储器提供通信接口;所述处理电路用于执行所述存储器中的程序指令,以实现如权利要求1至8中的任一所述方法。
- 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中存储了程序代码,所述程序代码被处理器执行时,实现权利要求1至8中任一项所述的方法。
- 一种计算机程序产品,其特征在于:所述计算机程序产品包含的程序代码被处理器执行时,实现权利要求1至8中任一项所述的方法。
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