WO2022141298A1 - 一种通信方法及装置 - Google Patents

一种通信方法及装置 Download PDF

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Publication number
WO2022141298A1
WO2022141298A1 PCT/CN2020/141808 CN2020141808W WO2022141298A1 WO 2022141298 A1 WO2022141298 A1 WO 2022141298A1 CN 2020141808 W CN2020141808 W CN 2020141808W WO 2022141298 A1 WO2022141298 A1 WO 2022141298A1
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WIPO (PCT)
Prior art keywords
base station
configuration
secondary base
communication
indication information
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PCT/CN2020/141808
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English (en)
French (fr)
Inventor
许斌
唐珣
王瑞
陈磊
Original Assignee
华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN202080103155.1A priority Critical patent/CN115918154A/zh
Priority to PCT/CN2020/141808 priority patent/WO2022141298A1/zh
Publication of WO2022141298A1 publication Critical patent/WO2022141298A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements

Definitions

  • the present application relates to the field of communication technologies, and in particular, to a communication method and device.
  • the communication system introduces a multi-connection communication method.
  • the commonly used multi-connection method is dual-connection.
  • the terminal device communicates with two base stations at the same time, and the base station configures a master cell group (MCG) and a secondary cell group (Secondary cell group) for the terminal device.
  • MCG master cell group
  • SCG secondary cell group
  • the terminal equipment working in the dual connection state If the terminal equipment working in the dual connection state is handed over, it will release the source secondary base station during the handover process and disconnect the connection with the source primary base station. After receiving the handover command, it will initiate random access to the target base station and finally access the communicate with the target base station.
  • the communication between the terminal device and the base station may be interrupted, reducing the communication quality. Therefore, how to improve the communication quality in the handover process of the terminal device working in the dual-connection state has become a technical problem that needs to be solved urgently.
  • Embodiments of the present application provide a communication method and apparatus, which are used to improve the communication quality of a terminal device during a handover process.
  • a first aspect provides a communication method, the method includes: a terminal device is handed over from a source base station to a target base station, the source base station and the target base station have the same or different secondary base stations, the terminal device uses a first configuration to pass The first radio bearer communicates with the secondary base station, the terminal device receives second configuration information from the network side, performs a second configuration on the first radio bearer according to the second configuration information, and reserves the first radio bearer configuration, the terminal device communicates with the secondary base station through the first radio bearer using the second configuration.
  • the terminal device first establishes the transmission path with the target secondary base station and then releases the transmission path with the source secondary base station during the handover process, so as to achieve uninterrupted connection during the handover process and improve communication quality.
  • the method may be performed by a first communication apparatus, and the first communication apparatus may be a communication apparatus or a communication apparatus, such as a chip, capable of supporting the functions required by the communication apparatus to implement the method.
  • the first communication apparatus is a terminal device, or a chip provided in the terminal device for implementing the function of the terminal device, or other components for implementing the function of the terminal device.
  • the first communication device is a terminal device.
  • the terminal device releases the first configuration, that is, the terminal device is establishing Only after the transmission path with the target secondary base station is released the transmission path with the source secondary base station, so as to improve the communication quality in the handover process.
  • the second configuration information includes at least one of radio link control RLC layer configuration, packet data convergence layer protocol PDCP layer configuration and security configuration.
  • the second configuration information is carried in a signaling radio bearer SRB3 from the secondary base station, or the second configuration information is carried in a handover command from the source base station.
  • the configuration efficiency of the communication system can be improved by carrying the second configuration information in the existing message.
  • the terminal device sends second indication information to the secondary base station, where the second indication information is used to indicate that the second configuration has been completed.
  • the terminal device receives third indication information from the secondary base station or from the target base station, where the third indication information is used to instruct release of the first configuration.
  • the first configuration includes a first PDCP entity and a first RLC entity, and the first PDCP entity, the first RLC entity and the first security configuration are associated with each other.
  • the performing the second configuration on the first radio bearer according to the second configuration information includes reconfiguring the first radio bearer according to the second configuration information A PDCP entity, establishing a second RLC entity and performing a second security configuration, the first PDCP entity, the second RLC entity and the second security configuration are associated with each other.
  • the performing the second configuration on the first radio bearer according to the second configuration information includes establishing a second PDCP entity according to the second configuration information, establishing a second RLC entity, and performing a second Security configuration, the second PDCP entity, the second RLC entity and the second security configuration are associated with each other.
  • the performing the second configuration on the first radio bearer according to the second configuration information includes reconfiguring the first PDCP entity according to the second configuration information, reconfiguring the first RLC entity, and reconfiguring the first RLC entity according to the second configuration information.
  • a second security configuration is performed, and the first PDCP entity, the first RLC entity and the second security configuration are associated with each other.
  • the terminal device may establish a second transmission path according to the second configuration information for communicating with the target secondary base station, wherein the second transmission path is associated with the second security configuration, and the terminal device communicates with the source secondary base station through the
  • the first transmission path is associated with the first security configuration, and the security of the communication in the handover process can be enabled by distinguishing the security configuration.
  • a second aspect provides a communication method, the method includes: a secondary base station communicates with a terminal device through a first radio bearer, the terminal device is handed over from a source base station to a target base station, the source base station and the target base station have a common The secondary base station, where the secondary base station receives secondary base station indication information, where the secondary base station indication information is used to indicate that the secondary base station is the secondary base station of the target base station, and the secondary base station sends second configuration information to the terminal device, The second configuration information is used to perform a second configuration on the first radio bearer.
  • the method may be performed by a second communication apparatus, and the second communication apparatus may be a communication apparatus or a communication apparatus, such as a chip, capable of supporting the functions required by the communication apparatus to implement the method.
  • the second communication apparatus is a network device, or a chip provided in the network device for implementing the function of the network device, or other components for implementing the function of the network device.
  • the second communication device is a secondary base station.
  • the secondary base station can be released after establishing a new transmission path.
  • the old transmission path to improve the communication quality of the terminal equipment during the handover process.
  • the source secondary base station can release the old transmission path to improve the handover. The communication quality of the terminal device during the process.
  • the secondary base station before receiving the secondary base station indication information, uses the first configuration to communicate with the terminal device.
  • the secondary base station before receiving the secondary base station indication information, the secondary base station receives first indication information from the target base station, where the first indication information is used to indicate that the first configuration is retained, and the The first indication information may be included in the second configuration information, or carried in the same message as the second configuration information.
  • the secondary base station receives the security configuration from the target base station.
  • the second configuration information includes at least one of radio link control RLC layer configuration, packet data convergence layer protocol PDCP layer configuration and security configuration.
  • the second configuration information includes the first indication information, where the first indication information is used to indicate that the first configuration is reserved.
  • the second configuration information is carried in a signaling radio bearer SRB3 from the secondary base station, or the second configuration information is carried in a handover command from the source base station.
  • the secondary base station receives second indication information from the terminal device, where the second indication information is used to indicate that the second configuration has been completed.
  • the secondary base station sends third indication information to the terminal device, where the third indication information is used to instruct release of the first configuration.
  • a communication method in a third aspect, can be applied to a source base station, the method includes: handover of a terminal device from the source base station to a target base station, the source base station and the target base station have a common secondary base station, The source base station sends first indication information to the target base station, where the first indication information is used to indicate that the first configuration is retained during the handover process, the source base station sends a handover request message to the target base station, and the source base station sends a handover request message to the target base station. The base station receives the handover complete message from the target base station.
  • the target base station By sending the first indication information to the target base station, it can be instructed to retain the first configuration (first transmission path) with the source secondary base station during the handover process, and release it after the establishment of the new transmission path, so as to improve the efficiency of the terminal during the handover process.
  • the communication efficiency of the device By sending the first indication information to the target base station, it can be instructed to retain the first configuration (first transmission path) with the source secondary base station during the handover process, and release it after the establishment of the new transmission path, so as to improve the efficiency of the terminal during the handover process.
  • the communication efficiency of the device The communication efficiency of the device.
  • the method may be performed by a third communication apparatus, and the third communication apparatus may be a communication apparatus or a communication apparatus, such as a chip, capable of supporting the functions required by the communication apparatus to implement the method.
  • the third communication apparatus is a network device, or a chip provided in the network device for implementing the function of the network device, or other components for implementing the function of the network device.
  • the third communication apparatus is the source base station.
  • the source base station sends secondary base station indication information to the target base station, where the secondary base station indication information is used to indicate that the secondary base station is a secondary base station of the target base station.
  • the secondary base station indication information includes identification information of the secondary base station and/or frequency point information of a cell corresponding to the secondary base station.
  • the first indication information and/or the secondary base station indication information are carried in the handover request message.
  • a communication method in a fourth aspect, can be applied to a target base station, the method includes handover of a terminal device from a source base station to the target base station, the source base station and the target base station have a common secondary base station, the target base station The base station receives first indication information from the source base station, where the first indication information is used to indicate that the first configuration is retained during the handover process, and the target base station sends the secondary base station indication information to the secondary base station, and the secondary base station The indication information is used to indicate that the secondary base station is the secondary base station of the target base station.
  • the first configuration (the first transmission path) with the source secondary base station is retained during the handover process, and after the establishment of the new transmission path between the terminal device and the target secondary base station is completed Release again to improve the communication efficiency of the terminal device during the handover process.
  • the method may be performed by a fourth communication apparatus, and the fourth communication apparatus may be a communication apparatus or a communication apparatus, such as a chip, capable of supporting the functions required by the communication apparatus to implement the method.
  • the fourth communication apparatus is a network device, or a chip provided in the network device for implementing the function of the network device, or other components for implementing the function of the network device.
  • the fourth communication device is the target base station.
  • the target base station determines the secondary base station according to the indication information from the source base station, or determines the secondary base station according to a priori information.
  • the secondary base station indication information includes identification information of the secondary base station and/or frequency point information of a cell corresponding to the secondary base station.
  • the target base station sends the first indication information to the secondary base station.
  • the target base station sends the security configuration to the secondary base station.
  • a communication device may be the terminal device described in the first aspect above, or an electronic device (eg, a chip) configured in the terminal device, or a larger device including the terminal device.
  • the terminal device includes corresponding means or modules for performing the above method.
  • the communication device includes a processing unit (sometimes also referred to as a processing module) and a transceiving unit (sometimes also referred to as a transceiving module).
  • the communication apparatus includes: a processor, coupled to the memory, for executing instructions in the memory, so as to implement the method executed by the terminal device in the first aspect.
  • the communication device further includes other components, such as an antenna, an input and output module, an interface, and the like. These components may be hardware, software, or a combination of software and hardware.
  • a communication device is provided.
  • the communication apparatus may be the network device described in the second aspect above.
  • the communication device has the function of the secondary base station described above.
  • the communication device is, for example, a base station, or a baseband device in a base station, or a chip.
  • the communication device includes a baseband device and a radio frequency device.
  • the communication apparatus includes a processing unit (sometimes also called a processing module) and a transceiver unit (sometimes also called a transceiver module).
  • the communication apparatus includes a processing unit, configured to be coupled to the storage unit and execute a program or instruction in the storage unit to enable the communication apparatus to perform the function of the secondary base station.
  • a communication device is provided.
  • the communication apparatus may be the network device described in the third aspect.
  • the communication device has the function of the above-mentioned source base station.
  • the communication device is, for example, a base station, or a baseband device in a base station, or a chip.
  • the communication device includes a baseband device and a radio frequency device.
  • the communication apparatus includes a processing unit (sometimes also called a processing module) and a transceiver unit (sometimes also called a transceiver module).
  • the communication apparatus includes a processing unit, which is coupled to the storage unit and executes a program or an instruction in the storage unit to enable the communication apparatus to perform the function of the source base station.
  • a communication device is provided.
  • the communication apparatus may be the network device described in the fourth aspect.
  • the communication device has the function of the target base station described above.
  • the communication device is, for example, a base station, or a baseband device in a base station, or a chip.
  • the communication device includes a baseband device and a radio frequency device.
  • the communication apparatus includes a processing unit (sometimes also called a processing module) and a transceiver unit (sometimes also called a transceiver module).
  • the communication apparatus includes a processing unit, configured to be coupled to the storage unit and execute programs or instructions in the storage unit to enable the communication apparatus to perform the function of the target base station.
  • a communication system including the communication device according to the fifth aspect, the communication device according to the sixth aspect, and further, the communication device according to the seventh aspect and/or the communication device according to the eighth aspect. communication device.
  • a computer-readable storage medium is provided, the computer-readable storage medium is used to store a computer program or instruction, which, when executed, makes the above-mentioned first to fourth aspects or any one of them possible The methods described in the embodiments are implemented.
  • a computer program product comprising instructions, which, when executed on a computer, enable the methods described in the above first to fourth aspects or any one of the possible implementation manners thereof to be implemented.
  • 1 is a schematic diagram of a radio access network side protocol stack
  • FIG. 2A is a schematic diagram of an application scenario of an embodiment of the present application.
  • FIG. 2B is a schematic diagram of another application scenario of an embodiment of the present application.
  • 3A is a flowchart of a communication method provided by an embodiment of the present application.
  • 3B is a flowchart of another communication method provided by an embodiment of the present application.
  • 4A is a schematic diagram of a protocol stack provided by an embodiment of the present application.
  • FIG. 4B is a schematic diagram of a second configuration according to an embodiment of the present application.
  • FIG. 4C is another schematic diagram of performing the second configuration in an embodiment of the present application.
  • FIG. 4D is still another schematic diagram of performing a second configuration according to an embodiment of the present application.
  • FIG. 5 is a schematic block diagram of a communication device provided by an embodiment of the present application.
  • FIG. 6 is a schematic block diagram of a terminal device provided by an embodiment of the present application.
  • FIG. 7 is a schematic block diagram of a network device provided by an embodiment of the present application.
  • Terminal devices including devices that provide users with voice and/or data connectivity, specifically, include devices that provide users with voice, or include devices that provide users with data connectivity, or include devices that provide users with voice and data connectivity sexual equipment.
  • it may include a handheld device with wireless connectivity, or a processing device connected to a wireless modem.
  • the terminal equipment can communicate with the core network via a radio access network (RAN), exchange voice or data with the RAN, or exchange voice and data with the RAN.
  • RAN radio access network
  • the terminal equipment may include user equipment (UE), wireless terminal equipment, mobile terminal equipment, device-to-device (D2D) terminal equipment, vehicle to everything (V2X) terminal equipment , machine-to-machine/machine-type communications (M2M/MTC) terminal equipment, Internet of things (IoT) terminal equipment, subscription unit (subscriber unit), subscription station (subscriber) station), mobile station (mobile station), remote station (remote station), access point (access point, AP), remote terminal (remote terminal), access terminal (access terminal), user terminal (user terminal), user Agent (user agent), or user equipment (user device), etc.
  • UE user equipment
  • D2D device-to-device
  • V2X vehicle to everything
  • M2M/MTC machine-to-machine/machine-type communications
  • IoT Internet of things
  • subscription unit subscriber unit
  • subscription station subscriber
  • mobile station mobile station
  • remote station remote station
  • access point access point
  • AP remote terminal
  • remote terminal remote terminal
  • access terminal
  • these may include mobile telephones (or "cellular" telephones), computers with mobile terminal equipment, portable, pocket-sized, hand-held, computer-embedded mobile devices, and the like.
  • mobile telephones or "cellular” telephones
  • PCS personal communication service
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • constrained devices such as devices with lower power consumption, or devices with limited storage capacity, or devices with limited computing power, etc.
  • information sensing equipment such as barcode, radio frequency identification (RFID), sensor, global positioning system (GPS), and laser scanner.
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices or smart wearable devices, etc. It is a general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes. Wait.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-scale, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which needs to cooperate with other devices such as smart phones.
  • Use such as all kinds of smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.
  • the various terminal devices described above if they are located on the vehicle (for example, placed in the vehicle or installed in the vehicle), can be considered as on-board terminal equipment.
  • the on-board terminal equipment is also called on-board unit (OBU). ).
  • the terminal device may further include a relay (relay).
  • a relay relay
  • any device capable of data communication with the base station can be regarded as a terminal device.
  • the apparatus for implementing the function of the terminal device may be the terminal device, or may be an apparatus capable of supporting the terminal device to implement the function, such as a chip system, and the apparatus may be installed in the terminal device.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • Network equipment including, for example, access network (AN) equipment, such as a base station (for example, an access point), which may refer to a device in the access network that communicates with wireless terminal equipment over the air interface through one or more cells , or, for example, a network device in a vehicle-to-everything (V2X) technology is a roadside unit (RSU).
  • the base station may be used to interconvert the received air frames and IP packets, acting as a router between the terminal equipment and the rest of the access network, which may include the IP network.
  • the RSU can be a fixed infrastructure entity supporting V2X applications and can exchange messages with other entities supporting V2X applications.
  • the network device can also coordinate the attribute management of the air interface.
  • the network equipment may include an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in the LTE system or long term evolution-advanced (LTE-A), or may also include fifth generation mobile
  • NodeB or eNB or e-NodeB, evolutional Node B in the LTE system or long term evolution-advanced (LTE-A)
  • LTE-A long term evolution-advanced
  • the next generation node B (gNB) in the communication technology (the 5th generation, 5G) NR system (also referred to as the NR system) may also include a cloud radio access network (Cloud RAN) system
  • a centralized unit (centralized unit, CU) and a distributed unit (distributed unit, DU) in the embodiments of the present application are not limited.
  • the network equipment may also include core network equipment, and the core network equipment includes, for example, an access and mobility management function (AMF) or a user plane function (UPF), and the like. Since the embodiments of the present application mainly relate to the access network, in the following description, unless otherwise specified, the network equipment refers to the access network equipment.
  • AMF access and mobility management function
  • UPF user plane function
  • the apparatus for implementing the function of the network device may be the network device, or may be an apparatus capable of supporting the network device to implement the function, such as a chip system, and the apparatus may be installed in the network device.
  • the technical solutions provided by the embodiments of the present application are described by taking the device for realizing the function of the network device being a network device as an example.
  • Fig. 1 shows a partial structure of a protocol stack taking a base station and a UE as an example.
  • the user plane protocol stack structure may include a radio resource control (radio resource control, RRC) layer, a service data adaptation (service data adaptation protocol, SDAP) layer. layer, packet data convergence layer protocol (packet data convergence protocol, PDCP) layer, radio link control (radio link control, RLC) layer, media access control (media access link control, MAC) and physical layer, etc., of which RRC layer and SDAP layers are not shown in Figure 1.
  • RRC radio resource control
  • SDAP service data adaptation protocol
  • the downlink data After the downlink data is mapped by the SDAP layer, it first reaches the PDCP layer of the base station, and is processed by the PDCP layer of the base station and then transmitted to the RLC layer and the MAC layer. After processing, from the physical layer It is sent out and transmitted to the UE side through the air interface.
  • each protocol layer on the UE side sequentially performs corresponding processing on the data packets according to the processing sequence opposite to that of the base station.
  • the processing of data packets by various layers can be visually combined and called radio bearer.
  • Each radio bearer configuration includes a PDCP entity configuration, and a radio bearer configuration is associated with at least one RLC entity configuration, and each RLC entity configuration corresponds to a logical channel configuration.
  • Transmission path in this application, different transmission paths may refer to different radio bearers, or may refer to different protocol entity processing processes in the same radio bearer, for example, at the transmitting end, the same radio bearer includes one PDCP entity and two RLC entities (for example, the first RLC entity and the second RLC entity), if the data packet is processed by PDCP, transmitted to the first RLC entity for processing, and sent out through the air interface is called a transmission path, and if the data packet After PDCP processing, it is transmitted to the second RLC entity for processing, and sent out through the air interface, which is called another transmission path. And each transmission path performs peer-to-peer processing on the data packets by the corresponding entity at the receiving end. Transmission paths corresponding to the same PDCP entity belong to one radio bearer, that is, there may be multiple different transmission paths in one radio bearer.
  • system and “network” in the embodiments of this application may be used interchangeably.
  • At least one means one or more, and “plurality” means two or more.
  • And/or which describes the relationship of the associated objects, indicates that there can be three kinds of relationships, for example, A and/or B, it can indicate that A exists alone, A and B exist at the same time, and B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the associated objects are an "or” relationship.
  • ordinal numbers such as “first” and “second” mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the size, content, order, and timing of multiple objects , priority or importance, etc.
  • first configuration information and the second configuration information are only for distinguishing different configuration information, but do not indicate the difference in size, content, sending order, priority or importance of the two configurations, nor do they limit the two Whether the configuration information is carried in the same or different messages.
  • the technical solutions provided in the embodiments of the present application can be applied to the fourth generation mobile communication technology (the 4th generation, 4G) system, such as the LTE system, or can be applied to the 5G system, such as the NR system, or can also be applied to the next generation mobile communication system or other similar communication systems, which are not specifically limited.
  • the 4th generation, 4G the 4th generation, 4G system
  • the 5G system such as the NR system
  • next generation mobile communication system or other similar communication systems which are not specifically limited.
  • FIG. 2A is an application scenario of the embodiment of the present application.
  • FIG. 2A includes a network device 1, a network device 2, a network device 3 and a terminal device.
  • the network equipment 1 is the primary base station of the terminal equipment
  • the network equipment 2 is the secondary base station of the terminal equipment. EN-DC).
  • the network device 2 is deployed within the coverage of the network device 1 and the network device 3, and then when the terminal device is switched from the network device 1 to the network device 3, the network device 2 can still serve as the secondary base station of the terminal device.
  • the network device 2 It can be an NR base station
  • the network device 1 and the network device 3 can be an LTE base station
  • the NR base station can serve as a secondary base station of multiple LTE base stations, and form an EN-DC architecture with multiple LTE base stations to provide communication services for the UE.
  • FIG. 2A is only a possible application scenario, and the communication method provided by the embodiments of the present application may also be applicable to a communication architecture in which the source base station and the target base station do not share the secondary base station, that is, before the terminal device switches and After the handover, services can be obtained through different secondary base stations.
  • the network device 1 and the network device 2 form an EN-DC to serve the UE
  • the network device 3 and the network device 4 form an EN-DC to serve the UE
  • the network device 2 and the network device 4 are different secondary base stations.
  • the network devices 1-4 may work in the E-UTRA system, or in the NR system, or in the next-generation communication system or other communication systems, and the network devices 1-4 may work in the same communication system, such as all Work in the E-UTRA system, or alternatively, in a different communication system.
  • the network devices in FIG. 2A and FIG. 2B are, for example, base stations.
  • the network device corresponds to different devices in different systems, for example, in a 4G system, it may correspond to an eNB, and in a 5G system, it corresponds to an access network device in 5G, such as a gNB.
  • the technical solutions provided in the embodiments of the present application can also be applied to future mobile communication systems, so the network devices in FIG. 2A and FIG. 2B can also correspond to network devices in future mobile communication systems.
  • FIG. 2A and FIG. 2B take the network device being a base station as an example.
  • the network device may also be a device such as an RSU.
  • the terminal device in FIG. 2A and FIG. 2B is a mobile phone as an example. In fact, according to the foregoing description of the terminal device, it can be known that the terminal device in the embodiment of the present application is not limited to the mobile phone.
  • the mobility management of a connected state UE is controlled by a network device.
  • the source base station sends an RRC configuration message to the connected UE, and the UE measures a series of cells according to the RRC configuration message.
  • the source base station reports the measurement result to the currently connected source base station, and the source base station determines whether the UE wants to switch according to the measurement result.
  • it when it is determined that the UE needs to be handed over, it sends a handover request message to the target base station, and the target base station determines whether to allow the UE to access according to its communication capability, and sends a handover request confirmation message to the source base station.
  • the source base station After receiving the handover confirmation message, the source base station sends the configuration information of the target base station to the UE through an RRC reconfiguration message (also known as a handover command).
  • the handover command may include the access target. Information such as random access resources required by the cell.
  • the UE After the UE receives the handover command, it will disconnect from the source base station and establish an RRC connection with the target cell through random access. That is to say, during the handover process, the communication between the UE and the network device will be interrupted.
  • the UE In the traditional handover process, after the UE receives the handover command, it will disconnect from the source base station, perform downlink synchronization with the cell of the target base station by reading system messages, and then perform uplink synchronization with the target cell through random access. During this process, the UE cannot communicate. Therefore, before the UE successfully accesses the target base station, the sending and receiving of data by the UE will be interrupted.
  • 5G In order to support ultra-reliable low-latency communication (URLLC) and other business short-latency requirements, 5G also proposes a 0ms interrupt switching process, such as Dual Active Protocol Stack (DAPS) ).
  • DAPS Dual Active Protocol Stack
  • the UE before successfully accessing the target base station, the UE communicates through the communication link with the source base station; and after successfully accessing the target base station, the UE communicates through the communication link with the target base station, and releases the communication link with the source base station. communication link, so that the data communication can be uninterrupted during the whole handover process.
  • the dual-connection communication structure has not yet introduced DAPS or other smooth handover methods.
  • the UE in the dual-connection state will disconnect from the source primary base station (the primary base station before the UE handover) and the source secondary base station (the secondary base station before the UE handover) during handover. base station), after establishing a connection with the target primary base station (the primary base station after the UE handover), add the target secondary base station (the secondary base station after the UE handover). After the target secondary base station is added, the UE can communicate with the target secondary base station. Therefore, during the handover process, the communication between the UE and the secondary base station will be interrupted.
  • the secondary base station NR base station
  • the terminal device in dual connection does not interrupt the communication with the source secondary base station during the handover process, and releases the transmission path with the source secondary base station after establishing the transmission path with the target secondary base station, thereby improving the terminal Communication quality between the device and the secondary base station.
  • the method is performed by the source base station, the target base station, the secondary base station and the UE as an example, and it is assumed here that the source secondary base station and the target secondary base station are the same secondary base station.
  • the source base station may be the network device 1 in the network architecture shown in FIG. 2
  • the secondary base station may be the network device 2 in the network architecture shown in FIG. 2
  • the target base station may be the network architecture shown in FIG. 2.
  • the UE may be a terminal device in the network architecture shown in FIG. 2 .
  • the UE is in a dual-connection state
  • the source base station is the primary base station of the UE
  • the source base station or the secondary base station sends first configuration information to the UE
  • the UE configures the first radio bearer according to the first configuration information
  • the first configuration is performed, and the UE uses the first configuration to communicate with the secondary base station through the first radio bearer (hereinafter referred to as using the first configuration to communicate with the secondary base station).
  • the UE receives the second configuration information from the secondary base station, and performs the second configuration on the first radio bearer according to the second configuration information, while retaining the first configuration, wherein the secondary base station's
  • the second configuration information is sent by the secondary base station to the UE or forwarded by the target base station to the UE through the source base station.
  • the UE may retain and continue to use the first configuration to communicate with the secondary base station before communicating with the secondary base station through the second configuration, and may release the first configuration after using the second configuration to communicate with the secondary base station.
  • the terminal device in dual connection can first establish a new transmission path with the secondary base station and use the new transmission path for communication during the handover process, and then use the new transmission path.
  • the old transmission path is reserved and used for communication, so that the communication with the secondary base station is not interrupted during the handover process, and the communication quality between the UE and the secondary base station is improved.
  • different configurations may correspond to different transmission paths of the same radio bearer, for example, the first configuration corresponds to the first transmission path, and the second configuration corresponds to the second transmission path.
  • different configurations correspond to different radio bearers, for example, the first configuration corresponds to the first radio bearer, and the second configuration corresponds to the second radio bearer, which are the first transmission path and the second transmission path, respectively, where the first A radio bearer and a second radio bearer may belong to the same secondary base station or belong to different secondary base stations.
  • this embodiment takes the case of the same radio bearer with different transmission paths as an example to illustrate the technical solution.
  • the first configuration refers to the establishment or reconfiguration of the MAC entity, the RLC entity and/or the PDCP entity, and may further include the security configuration.
  • the text will be introduced in detail.
  • the use of the first configuration (or the second configuration) to communicate with the secondary base station can be understood as: performing communication and transmission through a transmission path formed between the established (or reconfigured) MAC entity, RLC entity, and PDCP entity with the secondary base station. It should be understood that there may be multiple configurations for the same first radio bearer, such as the first configuration and the second configuration, and different configurations may correspond to the same or different transmission paths, so the UE can use multiple transmission paths to pass the first radio bearer communicate with the secondary base station.
  • Step S301 the UE establishes dual connections with the source base station and the secondary base station, and uses a first configuration to communicate with the secondary base station through a first radio bearer, where the first configuration is a configuration performed by the UE on the first radio bearer according to the first configuration information.
  • Step S302 the source base station sends a handover request message to the target base station, and accordingly, the target base station receives the handover request message from the source base station, and the handover request message is used to request handover of the UE from the source base station to the target base station.
  • Step S303 the target base station sends the secondary base station indication information to the secondary base station, the secondary base station indication information is used to add the secondary base station as the secondary base station of the target base station, and further, the target base station sends the first indication information to the secondary base station.
  • Step S304 the secondary base station sends second configuration information to the UE, where the second configuration information is used to perform the second configuration on the first radio bearer, and correspondingly, the UE receives the second configuration information from the secondary base station.
  • Step S305 the UE performs a second configuration on the first radio bearer according to the second configuration information, and retains the first configuration.
  • Step S306 the UE uses the second configuration to communicate with the secondary base station.
  • Step S307 the UE releases the first configuration.
  • Step S308 the UE sends a handover complete message to the target base station, and accordingly, the target base station receives the handover complete message from the UE.
  • a new transmission path can be established with the secondary base station first, and then the old transmission path can be released. , so that the communication between the terminal device and the secondary base station is not interrupted during the handover process, and the communication quality of the UE is improved.
  • the UE establishes dual connections with the source base station and the secondary base station, and uses the first configuration to communicate with the secondary base station through the first radio bearer, where the first configuration is the configuration performed by the UE on the first radio bearer according to the first configuration information .
  • the UE is in a dual-connection state and can communicate with the source base station and the secondary base station at the same time.
  • radio bearers are generally used.
  • the UE and the base station can establish multiple radio bearers for communication.
  • the UE uses the first configuration to communicate with the secondary base station through the first radio bearer.
  • the first configuration is the configuration performed by the UE on the first radio bearer according to the first configuration information, that is, the first configuration is
  • the UE corresponds to the configuration of the source secondary base station (the secondary base station of the source base station) before the handover, or it is understood that the first configuration is the configuration required by the UE for communicating with the source secondary base station.
  • the use of the first configuration to communicate with the secondary base station through the first radio bearer can be understood as the first transmission path used by the UE to communicate with the secondary base station before the handover, and the first configuration information can be understood as the information sent by the base station to the UE before the handover. Configuration information about the first transmission path.
  • the UE and the base station may establish multiple radio bearers for communication, and it may also be understood that the first radio bearer includes at least one radio bearer, and the first configuration is to configure at least one radio bearer among them.
  • the first configuration includes a first PDCP entity and a first RLC entity, and the first PDCP entity, the first RLC entity and the first security configuration are associated with each other.
  • the UE communicates with the secondary base station through the first radio bearer using the first configuration
  • the first PDCP entity After the data packet of the UE is processed by the first PDCP entity, it is transmitted to the first RLC entity for processing, and sent out through the air interface, wherein the first security Configuration is used to ensure transport security.
  • the method further includes receiving first configuration information from a network device, where the network device may be a source base station or a secondary base station.
  • the method further includes performing a first configuration on the first radio bearer according to the first configuration information, for example, the UE establishes the first radio bearer according to the first configuration information, and specifically, establishes the first radio bearer according to the first configuration information.
  • the PDCP entity and the first RLC entity perform a first security configuration, and the first PDCP entity, the first RLC entity and the first security configuration are associated with each other.
  • the UE After the UE completes the establishment of the first radio bearer according to the first configuration information, it can use the first configuration to communicate with the secondary base station through the first radio bearer, or communicate with the secondary base station through the first transmission path.
  • the first configuration information is the configuration information used to configure the transmission path between the UE and the secondary base station before the handover, but is not limited to the transmission path configuration information for the first communication between the UE and the secondary base station.
  • the UE communicates with the secondary base station through the first radio bearer using other configurations, but before the handover, the first configuration has been performed on the first radio bearer according to the first configuration information, and the UE is in the first configuration through the first radio bearer.
  • the status of the bearer communicating with the secondary base station is the configuration information used to configure the transmission path between the UE and the secondary base station before the handover, but is not limited to the transmission path configuration information for the first communication between the UE and the secondary base station.
  • the source base station sends a handover request message to the target base station, and accordingly, the target base station receives the handover request message from the source base station, where the handover request message is used to request handover of the UE from the source base station to the target base station.
  • the method further includes step S3021, the source base station sends the secondary base station information to the target base station, correspondingly, the target base station receives the secondary base station information from the source base station, and the target base station determines whether to use the secondary base station after the handover according to the secondary base station information.
  • the same secondary base station forms a dual connection with the target base station to provide communication services for the UE.
  • the target base station may determine the secondary base station in the following two ways.
  • the secondary base station information is reference information, and the target secondary base station after the handover is determined by the target base station.
  • the source base station sends the secondary base station information of the source base station to the target base station.
  • the secondary base station information indicates that the secondary base station of the source base station is base station A.
  • the secondary base station information may further indicate the location information, identification information or frequency information of base station A.
  • the target base station Whether to use the source secondary base station as the secondary base station of the target base station after the handover can be determined according to the secondary base station information; for another example, the secondary base station information is used to indicate that the UE is configured with dual connectivity, and the target base station further determines the corresponding base station according to the prior information.
  • the secondary base station wherein the prior information may be obtained in advance by the target base station through the Xn interface, or the prior information may be pre-configured through operation administration and maintenance (OAM).
  • OAM operation administration and maintenance
  • the target base station can flexibly decide the target secondary base station through the secondary base station information from the source base station, so as to improve the quality of the communication service of the UE.
  • the secondary base station information is used to indicate that the target base station can continue to use the source secondary base station as the target secondary base station.
  • the target base station can decide whether to accept the source secondary base station as the target base station according to its own situation. target secondary base station.
  • the source secondary base station information includes source secondary base station identification information, location information or frequency information, and the target base station determines the secondary base station corresponding to the secondary base station identification information as the target secondary base station.
  • the source base station can specify the secondary base station of the target base station through the secondary base station information, which increases configuration flexibility.
  • the method further includes step S3022: the source base station sends first indication information to the target base station, where the first indication information is used to indicate whether to reserve or not to release the first configuration or transmission path, and may further indicate which radios to reserve. bearer configuration; or the first indication information is used to indicate that the communication between the secondary base station and the UE is not interrupted during the handover process, and correspondingly, the target base station receives the first indication information from the source base station. That is, the source base station can use the first indication information to indicate that the communication with the secondary base station is not interrupted during the handover process, so as to improve the communication quality of the UE.
  • the first indication information may be included in the second configuration information, or carried in the same message as the second configuration information, and the first indication information may be implemented in two ways, either explicitly or implicitly.
  • the first indication information is to explicitly indicate that the communication of some radio bearers will not be interrupted or not interrupted during the handover process by adding an information element (information element, IE), an indication field or a field. All wireless bearer communications.
  • information element information element
  • the UE identity, service identity, quality of service (QoS) parameters and/or source base station identity that do not interrupt communication during the handover process are pre-defined or configured, and the target base station can request the handover through the handover request.
  • the UE identifier, service identifier, QoS parameter and/or source base station identifier in the switch are used to determine whether there is a radio bearer in this handover process that needs to ensure uninterrupted service transmission.
  • the method further includes step S3023: the source base station sends a measurement result of the UE to the target base station, where the measurement result is obtained by the UE by measuring the reference signal from the secondary base station, and the measurement result is used to indicate the UE to communicate with the target base station. the channel quality of the secondary base station.
  • the target base station receives the measurement result of the UE from the source base station, and further, the target determines whether to keep the communication with the secondary base station uninterrupted during the handover process according to the measurement result.
  • the target base station determines, according to the measurement result, that the channel quality of the secondary base station and the UE meets a preset threshold or that the channel quality of the secondary base station and the UE is ranked better among all candidate secondary base stations, such as ranking first or ranking top N, the target The base station may decide to continue adding the secondary base station as the target secondary base station, that is, keep the communication between the UE and the secondary base station uninterrupted, where N is pre-configured or predefined.
  • At least one of the above-mentioned secondary base station information, the first indication information and the measurement result of the UE may be carried in the handover request message, or may be carried in other existing messages or sent through a separate message, which is not limited in this application. Whether the handover request message, the secondary base station information, the first indication information and the measurement result of the UE are sent in the same message.
  • the target base station sends the secondary base station indication information to the secondary base station, where the secondary base station indication information is used to indicate that the secondary base station is a secondary base station of the target base station, or instruct to add the secondary base station as a target secondary base station.
  • the target base station After determining the secondary base station, the target base station sends indication information to the secondary base station to indicate the secondary base station. After the UE is handed over, it acts as the secondary base station and the target base station to provide dual-connection communication services for the UE.
  • the secondary base station can be the source secondary base station or the target base station. other secondary base stations that are different from the source secondary base station.
  • the method further includes step S3031, where the target base station sends first indication information to the secondary base station, where the first indication information is used to instruct to reserve the first configuration of the first radio bearer or to reserve the first transmission path, or during the handover process.
  • the communication between the UE and the secondary base station is not interrupted.
  • the first indication information may include a UE identifier to individually designate a UE that does not interrupt the communication service, and may also include a radio bearer identifier to independently designate an uninterrupted radio bearer to achieve flexible control.
  • the first indication information may be included in the second configuration information, or carried in the same message as the second configuration information.
  • the method further includes step S3032, the target base station may send a security configuration to the secondary base station, where the security configuration is used to indicate the security configuration applied when the secondary base station and the UE establish a new transmission path, and the security configuration includes the security configuration.
  • the key information and/or the security algorithm information may also include input parameters required to push the new security parameters, such as identification information or frequency information.
  • the target base station can instruct the UE to use the security configuration parameters used by the new transmission path after handover by sending the security configuration to the secondary base station, so as to realize flexible scheduling.
  • the secondary base station sends second configuration information to the UE, where the second configuration information is used to perform the second configuration on the first radio bearer, and correspondingly, the UE receives the second configuration information from the secondary base station.
  • the first radio bearer includes at least one radio bearer
  • the second configuration is to configure at least one radio bearer therein, that is, the second configuration information may include configuration information of at least one radio bearer.
  • the secondary base station may use the first configuration to send the second configuration information to the UE through the first radio bearer, or the secondary base station may send the second configuration information to the source base station, and the source base station may send the second configuration information to the UE, or the secondary base station may send the second configuration information To the target base station, the target base station sends it to the source base station, and then sends it to the UE through the source base station.
  • step S3041 may also be included: the secondary base station determines the second configuration information, that is, the secondary base station determines the configuration information of the transmission path of the UE after the handover.
  • the second configuration information includes at least one of the radio link control RLC layer configuration, the packet data convergence layer protocol PDCP layer configuration and the security configuration, which is used to configure the second transmission path of the first radio bearer (which can be understood as the second configuration), wherein the RLC layer is configured to configure the RLC entity of the second transmission path, the PDCP layer is configured to configure the PDCP entity of the second transmission path, and the security configuration is used to configure the security parameters applied to the second transmission path, hereinafter
  • the second configuration information will be described in detail in conjunction with the configuration method of the second configuration.
  • the second configuration information further includes indication information.
  • the indication information is used to indicate the type of the first radio bearer configured according to the second configuration information.
  • the type may be The secondary base station dual-active radio bearer or the secondary base station dual-path radio bearer.
  • the configuration method of the type of radio bearer can be predefined or pre-configured, for example, the radio bearer of the type can reconfigure the original PDCP entity, retain the original RLC entity and establish a new one. RLC entity.
  • the second configuration information may further include fourth indication information, where the fourth information is used to instruct the UE to retain the first configuration and perform the second configuration on the first radio bearer according to the second configuration information, for example, the fourth The indication information is associated with the first configuration information, and when the secondary base station sends the second configuration information and the first identifier to the UE, it is used to instruct the UE to retain the original configuration for the first radio bearer corresponding to the first identifier, and use the The second configuration information performs the second configuration on it. Further, through the fourth indication information, the secondary base station can indicate that the second configuration information does not include all the configuration information corresponding to the second configuration, and then the UE can combine the existing configuration or reuse the existing entity to re-use the first radio bearer. Configuration, for example, only different parameter information can be sent to save signaling transmission consumption.
  • the method further includes step S3042, where the secondary base station sends first indication information to the UE, where the first indication information is used to indicate that the first configuration is retained, or is used to indicate that the secondary base station is not interrupted during the handover process
  • the UE receives the first indication information from the secondary base station.
  • the function and indication manner of the first indication information please refer to the relevant description in step S3022.
  • the foregoing second configuration information and/or the first indication information may be carried in the signaling radio bearer SRB3, that is, the secondary base station may transmit the second configuration information in SRB3.
  • the secondary base station can also send the second configuration information and/or the first indication information to the source base station, and the source base station sends it to the UE, for example, the source base station can transmit the second configuration information and/or the first indication information through a handover command Or sent by other signaling.
  • the secondary base station can also send the second configuration information and/or the first indication information to the target base station, the target base station sends it to the source base station, and the source base station sends it to the UE.
  • the source base station can transmit the second configuration information and/or the second configuration information through a handover command. /or the first indication information or sent through other signaling.
  • step S305 the UE performs a second configuration on the first radio bearer according to the second configuration information, and retains the first configuration.
  • the second configuration refers to the configuration performed by the UE on the first radio bearer according to the second configuration information, that is, the second configuration is the configuration of the UE corresponding to the target secondary base station (the secondary base station of the target base station), or it can be understood as,
  • the second configuration is a configuration required by the UE to communicate with the target secondary base station after the handover.
  • the second configuration can also be understood as the UE reconfiguring the transmission path with the secondary base station according to the second configuration information.
  • retaining the first configuration can be understood that the terminal device continues to use the first configuration to communicate with the secondary base station through the first radio bearer, or temporarily does not release the first configuration to prepare for continued communication with the secondary base station.
  • the dashed box is a schematic diagram of the protocol stack of the terminal device, in which the left column represents the protocol stack used by the terminal device to communicate with the network device 1 before switching, and the right column represents that the terminal device communicates with the network device 1 after switching.
  • the protocol stack used by the network device 3 for communication, and the middle column represents the protocol stack used by the terminal device to communicate with the network device 2 before and after the handover and during the handover process.
  • the terminal device may be, for example, a UE, the network device 1 is, for example, a source base station, the network device 2 is, for example, a secondary base station, and the network device 3 is, for example, a target base station.
  • the UE side protocol stack includes PDCP entity, RLC entity, MAC entity and PHY entity.
  • the UE uses the first configuration to communicate with the secondary base station through the first transmission path.
  • the first transmission path is shown in Fig. In 4A, the data is processed by the PDCP entity 1, the RLC entity 1, the MAC entity and the PHY entity and transmitted to the transmission path of the network device 2 (source secondary base station) through the air interface.
  • the UE performs a second configuration on the first radio bearer according to the second configuration information to form a second transmission path other than the first transmission path, including configuring a security key or a security algorithm according to the security configuration, and then the first transmission path.
  • the path and the second transmission path may correspond to different security configurations, and the security configurations are used to securely process the data packets, including encryption, decryption, integrity protection, and integrity verification, so as to realize the security of communication transmission, because
  • the security configuration of the secondary base station is associated with the primary base station.
  • the security configuration is different. Therefore, for the first transmission path and the second transmission path configuration Different security configurations can make data communication work correctly.
  • the UE may also establish a new RLC entity and/or PDCP entity according to the second configuration, or reconfigure (reconfigure) an existing RLC entity and/or PDCP entity.
  • the UE establishes a new RLC entity 2 according to the second configuration information, and reconfigures the PDCP entity 1 according to the second configuration information, and the second transmission path corresponds to PDCP
  • the transmission path formed by entity 1, RLC entity 2, MAC entity, and PHY entity, wherein the UE also configures a new security configuration 2 for PDCP entity 1 according to the security configuration in the second configuration information.
  • PDCP entity 1 passes through the first transmission path
  • the old security configuration 1 is applied when transmitting data
  • the new security configuration 2 is applied when the PDCP entity 1 transmits data through the first transmission path, so as to realize the security of data transmission before and after handover.
  • the UE associates the RLC entity 1 and the RLC entity 2 with the PDCP entity 1 according to the second configuration information, so that the data packets processed by the RLC entity 1 and the RLC entity 2 can be submitted to the PDCP entity 1 for processing; further, the UE It is necessary to associate the RLC entity 1 with the old security configuration 1 and the RLC entity 2 with the new security configuration 2 according to the second configuration information, so that the data packets processed by the RLC entity 1 use the old security configuration in the PDCP entity 1.
  • the data packets processed by the RLC entity 2 are processed by the new security configuration 2 in the PDCP entity 1.
  • the UE multiplexes the old PDCP entity 1 and establishes a new RLC entity 2.
  • the second configuration information there are two possible indication modes for the second configuration information:
  • the second configuration information includes PDCP layer configuration 1, RLC layer configuration 1, RLC layer configuration 2, security configuration 1 and security configuration 2, wherein the PDCP layer configuration is used to reconfigure the PDCP entity 1 or release the original PDCP entity and create a new PDCP entity 1, the RLC layer configuration 1 is used to configure the new RLC entity 1, the RLC layer configuration 2 is used to configure the new RLC entity 2, the security configuration 1 corresponds to the RLC entity 1, and the security configuration 1 corresponds to the RLC entity 1.
  • Configuration 2 corresponds to RLC entity 2.
  • the second configuration information may include the same radio bearer identifier in RLC layer configuration 1 and RLC layer configuration 2, and associate the identifier with the PDCP layer configuration, so that RLC entity 1 and RLC entity 2 are related to PDCP entity 1 finally link.
  • the identifier of the first RLC entity may be included in the RLC layer configuration 1
  • the identifier of the second RLC entity may be included in the RLC layer configuration 2
  • the identifier of the first RLC entity and the identifier of the second RLC entity may be included in the PDCP layer configuration 1
  • the UE may configure PDCP layer 1 to correspond to RLC entity 1 and RLC entity 2
  • the second configuration information may also include indication information to indicate the correspondence between the RLC layer and the security configuration, or the second configuration information
  • the identifier of the corresponding RLC entity may be included in the security configuration.
  • the identifier of the RLC layer configuration 2 is included in the security configuration 2 or the same identifier is included in both the security configuration 2 and the RLC layer configuration 2. Then the UE can determine that the RLC layer 2 corresponds to the security configuration. Configuration 2 can be used to transmit data packets corresponding to the second transmission path.
  • the second configuration information includes RLC layer configuration 2, security configuration 1 and fourth indication information.
  • RLC layer configuration 2 and security configuration 1 please refer to the first indication mode.
  • the indication information is used to indicate that the first configuration is reserved and the second transmission path is configured according to the second configuration information, or the fourth indication information is used to indicate the type of the second transmission path.
  • the first configuration can be retained, and the second transmission path can be configured according to the second configuration.
  • the second configuration information can be understood as only transmitting incremental configuration information in this indication manner, thereby reducing the consumption of signaling transmission.
  • the UE configures new PDCP entity 2 and RLC entity 2 according to the second configuration information to form a second transmission path, and the second transmission path corresponds to PDCP entity 2 and RLC entity 2.
  • the UE reconfigures the PDCP entity 1 and the RLC entity 1 according to the second configuration information, and creates a second logical channel to form a second transmission path.
  • the transmission path corresponds to the reconfigured PDCP entity 1, the reconfigured RLC entity 1, the transmission path formed by the second logical channel, the MAC entity, and the PHY entity, wherein the UE is also configured as PDCP according to the security in the second configuration information Entity 1 and RLC Entity 2 configure the new security configuration.
  • the second configuration multiplexes the original PDCP entity 1 and the RLC entity 1 and performs reconfiguration.
  • two logical channels are associated, respectively corresponding to the first transmission path and the second transmission path. 2.
  • the securely processed data is transmitted through the second transmission path.
  • the UE can configure the second transmission path according to the second configuration information.
  • the same robust header compression (ROHC) can be applied to RLC entity 1 and RLC entity 2 ) configuration information
  • the first transmission path and the second transmission path may share the same MAC entity and the same PHY entity.
  • the protocol stack on the base station side corresponds to the protocol stack on the UE side. Therefore, the method for the UE to perform the second configuration according to the second configuration information in this application can also be applied to the secondary base station.
  • the first radio bearer performs the second configuration, and retains the first configuration, so that the first transmission path is released after the second transmission path is established, so as to improve the communication quality, which is not repeated here.
  • the method in this embodiment is applicable to both uplink and downlink, which is not specifically limited.
  • the method may further include step S3051, the UE sends second indication information to the secondary base station, where the second indication information is used to indicate that the second transmission path has been established according to the second configuration.
  • the secondary base station receives data from The second indication information of the UE, where the second indication information may be forwarded by the target base station, the UE first sends the second indication information to the target base station, and the target base station sends the second indication information to the secondary base station.
  • the UE may explicitly indicate the establishment completion information to the secondary base station, for example, by adding a message, IE or field to indicate that the second configuration is established; in another possible implementation, The UE may implicitly indicate the establishment completion information to the secondary base station.
  • the UE may transmit uplink data to the secondary base station through the second configuration.
  • the secondary base station may determine that the second transmission can be used subsequently.
  • the path communicates with the UE, and the signaling consumption can be saved and the transmission efficiency can be improved by the method of implicit indication.
  • the method may further include step S3052, the secondary base station sends third indication information to the UE, and correspondingly, the UE receives third indication information from the secondary base station, where the third indication information is used to indicate the release of the first configuration, it can also be understood that the third indication information is used to instruct release of the first configuration.
  • the secondary base station explicitly sends the third indication information to the UE, for example, by adding a message, IE or field to indicate the release of the first configuration information or the release of the first configuration; in another
  • the secondary base station implicitly sends the third indication information to the UE, for example, the secondary base station transmits downlink data to the UE through the second transmission path, and after the UE receives the data transmitted from the secondary base station through the second transmission path, it can determine Subsequent communication with the secondary base station through the second transmission path, thereby releasing the first configuration, through the implicit indication method, can save signaling consumption and improve transmission efficiency.
  • step S306 the UE communicates with the secondary base station using the second configuration.
  • using the second configuration to communicate with the secondary base station can be understood as communicating with the secondary base station using the first radio bearer that has undergone the second configuration, that is, using the second transmission path of the first radio bearer to communicate with the secondary base station.
  • the UE communicates with the secondary base station through the old transmission path (the first configuration), and after the new transmission path is established, the UE communicates with the secondary base station through the new transmission path (the second configuration), Therefore, during the handover process, the communication between the UE and the secondary base station is not interrupted, which can improve the communication experience of the UE.
  • step S307 the secondary base station releases the first configuration information, and the UE releases the first configuration information.
  • step S307 is an optional step. After the UE communicates with the secondary base station through the second configuration, it releases the first configuration information (or is understood as releasing the first configuration), so as to ensure that before applying the new transmission path, the UE releases the first configuration information.
  • the old transmission path can be used to communicate with the secondary base station to ensure the communication quality during the handover process.
  • step S308 the UE sends a handover complete message to the target base station, and correspondingly, the target base station receives the handover complete message from the UE.
  • step S307 and step S308 This embodiment of the present application does not limit the execution order of step S307 and step S308.
  • the communication between the UE and the secondary base station can be uninterrupted during the handover process, and the UE and the secondary base station can also be switched during the handover.
  • the first configuration information and/or the first configuration are released.
  • the second configuration and the second transmission path in the embodiments of the present application are used to express the transmission path for the UE to communicate with the secondary base station after handover, which may include at least one bearer.
  • the uplink information and the downlink information may be It is transmitted through different radio bearers, and at least one second configuration can be configured through one piece of second configuration information, or can be configured through different second configuration information.
  • the second configuration information is used to indicate that the UE communicates with the secondary base station after handover. Transmission path configuration information for communication.
  • the UE in dual connectivity may establish a second transmission path according to the second configuration information during the handover process, and release the first configuration after establishing the second transmission path with the secondary base station, so as to achieve uninterrupted handover process Communication transmission to improve the communication quality of the UE.
  • the UE uses the first transmission path to communicate with the source secondary base station at the same time, and configures the second transmission path and the target secondary base station.
  • the base station communicates, and the first transmission path and the second transmission path correspond to different radio bearers respectively.
  • the UE disconnects the communication with the source secondary base station to ensure that the communication with the secondary base station does not occur during the handover process. interrupt.
  • the specific configuration method and configuration process are similar to the scenario in which the secondary base station remains unchanged. After the target base station receives the instruction from the source base station or the configuration of the source secondary base station, the target secondary base station is added.
  • the UE maintains the communication connection with the source secondary base station according to the base station's instruction, and accesses the target secondary base station. After starting to communicate with the target secondary base station, the UE disconnects the connection with the source secondary base station, which will not be described in detail.
  • FIG. 5 is a schematic structural diagram of a communication apparatus provided by an embodiment of the present application.
  • the communication apparatus 500 may be the terminal device in FIG. 2A or FIG. 2B, and is used to implement the method corresponding to the terminal device in the foregoing method embodiments.
  • the communication apparatus may also be a network device 1-3 in FIG. 2A or FIG. 2B, for implementing the method corresponding to the source base station, the target base station or the secondary base station in the above method embodiments.
  • a network device 1-3 in FIG. 2A or FIG. 2B
  • Communication device 500 includes one or more processors 501 .
  • the processor 501 may also be referred to as a processing unit, and may implement certain control functions.
  • the processor 501 may be a general-purpose processor or a special-purpose processor, or the like. For example, including: baseband processors, central processing units, application processors, modem processors, graphics processors, image signal processors, digital signal processors, video codec processors, controllers, memories, and/or Neural network processors, etc.
  • the baseband processor may be used to process communication protocols and communication data.
  • the central processing unit may be used to control the communication device 500, execute software programs and/or process data.
  • the different processors can be stand-alone devices, or they can be integrated in one or more processors, for example, on one or more application specific integrated circuits.
  • the communication apparatus 500 includes one or more memories 502 for storing instructions 504, and the instructions can be executed on the processor, so that the terminal device 500 executes the methods described in the above method embodiments.
  • the memory 502 may also store data.
  • the processor and the memory can be provided separately or integrated together.
  • the communication apparatus 501 may include instructions 503 (sometimes may also be referred to as codes or programs), and the instructions 503 may be executed on the processor, so that the communication apparatus 500 executes the methods described in the above embodiments .
  • Data may be stored in the processor 501 .
  • the communication apparatus 500 may further include a transceiver 505 and an antenna 506 .
  • the transceiver 505 may be referred to as a transceiver unit, a transceiver, a transceiver circuit, a transceiver, an input/output interface, etc., and is used to implement the transceiver function of the communication device 500 through the antenna 506 .
  • the communication device 500 may further include one or more of the following components: a wireless communication module, an audio module, an external memory interface, an internal memory, a universal serial bus (universal serial bus, USB) interface, a power management module, an antenna, Speakers, microphones, I/O modules, sensor modules, motors, cameras, or displays, etc. It can be understood that, in some embodiments, the communication apparatus 500 may include more or less components, or some components may be integrated, or some components may be separated. These components may be implemented in hardware, software, or a combination of software and hardware.
  • the processor 501 and transceiver 505 described in this application can be implemented in an integrated circuit (IC), an analog IC, a radio frequency identification (RFID), a mixed-signal IC, an application specific integrated circuit (application specific integrated circuit) , ASIC), printed circuit board (printed circuit board, PCB), or electronic equipment, etc.
  • IC integrated circuit
  • RFID radio frequency identification
  • ASIC application specific integrated circuit
  • PCB printed circuit board
  • electronic equipment etc.
  • it may be an independent device (eg, an independent integrated circuit, a mobile phone, etc.), or may be a part of a larger device (eg, a module that can be embedded in other devices). The description of the terminal device and the network device will not be repeated here.
  • the communication device includes corresponding means, units and/or circuits to implement the UE functions described in the embodiments shown in Fig. 3 or Fig. 3B, Figs. 4A-4D.
  • the communication device includes a transceiver module to support the communication device to implement a transceiver function, and a processing module to support the communication device to process signals.
  • FIG. 6 is a schematic structural diagram of a communication apparatus provided by an embodiment of the present application, where the communication apparatus is, for example, a terminal device.
  • the terminal device 600 can be applied to the systems shown in FIG. 2A and FIG. 2B .
  • FIG. 6 only shows the main components of the terminal device 600 .
  • the terminal device 600 includes a processor, and optionally, a memory, a control circuit, an antenna, and an input and output device.
  • the processor is mainly used to process communication protocols and communication data, and to control the entire terminal device 600 , execute software programs, and process data of the software programs.
  • the memory is mainly used to store software programs and data.
  • the control circuit is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal.
  • Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, microphones, keyboards, etc., are mainly used to receive data input by users and output data to users.
  • the processor can read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program.
  • the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the control circuit.
  • the control circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal through the antenna in the form of electromagnetic waves.
  • the control circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, which converts the baseband signal into data and processes the data .
  • terminal device 600 may include multiple processors and memories.
  • the memory may also be referred to as a storage medium or a storage device, etc., which is not limited in this embodiment of the present invention.
  • the processor may include a baseband processor and a central processing unit.
  • the baseband processor is mainly used to process communication protocols and communication data
  • the central processing unit is mainly used to control the entire terminal device 600.
  • the software program is executed, and the data of the software program is processed.
  • the processor in FIG. 6 integrates the functions of the baseband processor and the central processing unit.
  • the baseband processor and the central processing unit may also be independent processors, interconnected by technologies such as a bus.
  • the terminal device 600 may include multiple baseband processors to adapt to different network standards, the terminal device 600 may include multiple central processors to enhance its processing capability, and various components of the terminal device 600 may be connected through various buses.
  • the baseband processor may also be expressed as a baseband processing circuit or a baseband processing chip.
  • the central processing unit can also be expressed as a central processing circuit or a central processing chip.
  • the function of processing the communication protocol and communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.
  • the antenna and control circuit with a transceiving function can be regarded as the transceiving unit 610 of the terminal device 600
  • the processor having a processing function can be regarded as the processing unit 620 of the terminal device 600
  • the terminal device 600 includes a transceiver unit 610 and a processing unit 620 .
  • the transceiver unit may also be called a transceiver module, a transceiver, a transceiver, a transceiver device, etc.
  • the processing unit may also be a processing module.
  • the device for implementing the receiving function in the transceiver unit 610 may be regarded as a receiving unit, and the device for implementing the transmitting function in the transceiver unit 610 may be regarded as a transmitting unit, that is, the transceiver unit 610 includes a receiving unit and a transmitting unit.
  • the receiving unit may also be referred to as a receiver, a receiver, a receiving circuit, and the like
  • the transmitting unit may be referred to as a transmitter, a transmitter, or a transmitting circuit, or the like.
  • the transceiver 505 and the transceiver unit 610 in FIG. 6 can be used to implement the steps related to reception and transmission in the above method embodiments, for example:
  • the transceiver 505 and the transceiver unit 610 are configured to use the first configuration to communicate with the secondary base station through the first radio bearer, to receive second configuration information from the network side, and to use the second configuration to communicate with the secondary base station through the The first radio bearer communicates with the secondary base station.
  • the transceiver 505 and the transceiver unit 610 are further configured to send second indication information to the secondary base station, where the second indication information is used to indicate that the second configuration has been completed.
  • the transceiver 505 and the transceiver unit 610 are further configured to receive third indication information from the secondary base station or from the target base station, where the third indication information is used to instruct release of the first configuration.
  • the processor 501 in FIG. 5 and the processing unit 620 in FIG. 6 may be used to implement the processing-related steps in the foregoing method embodiments, for example, performing the second configuration on the first radio bearer according to the second configuration information, The first configuration is retained.
  • An embodiment of the present application further provides a communication device, and the communication device can be used in each of the foregoing embodiments.
  • the communication apparatus includes means, units and/or circuits for realizing the functions of the source base station, the target base station or the secondary base station in the embodiments shown in FIG. 3 or FIG. 3B and FIGS. 4A-4D .
  • the communication device includes a transceiver module to support the communication device to implement a transceiver function, and a processing module to support the communication device to process signals.
  • FIG. 7 is a schematic structural diagram of a communication apparatus provided by an embodiment of the present application, where the communication apparatus is, for example, a network device.
  • the network device 700 can be applied to the system shown in FIG. 2A or 2B.
  • the network device 700 may function as a secondary base station with respect to one or some UEs, and may also function as a source base station or a target base station with respect to one or some UEs, with a source base station or a target base station. function of the base station.
  • the network equipment includes: a baseband device 701 , a radio frequency device 702 , and an antenna 703 .
  • the radio frequency device 702 receives the information sent by the terminal device through the antenna 703, and sends the information sent by the terminal device to the baseband device 701 for processing.
  • the baseband device 701 processes the information of the terminal device and sends it to the radio frequency device 702
  • the radio frequency device 702 processes the information of the terminal device and sends it to the terminal device through the antenna 701 .
  • the baseband device 701 includes one or more processing units (units also known as modules) 7011 , a storage unit 7012 and a transceiver unit 7013 .
  • the processing unit 7011 is configured to support the network device to perform the functions of the network device in the foregoing method embodiments.
  • the storage unit 7012 is used to store software programs and/or data.
  • the transceiver unit 7013, or interface is used for exchanging information with the radio frequency device 702, and the interface includes an interface circuit, which is used for information input and output.
  • the processing unit is an integrated circuit, such as one or more ASICs, or, one or more DSPs, or, one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits can be integrated together to form chips.
  • the storage unit 7012 and the processing unit 7011 may be located in the same chip, that is, an on-chip storage element. Alternatively, the storage unit 7012 and the processing unit 7011 may also be located on different chips from the processing element 7011, that is, an off-chip storage element.
  • the storage unit 7012 may be one memory, or may be a collective term for multiple memories or storage elements.
  • the network device may implement some or all of the steps in the foregoing method embodiments in the form of one or more processing unit schedulers. For example, the corresponding functions of the network device in FIG. 3A or FIG. 3B are implemented.
  • the one or more processing units may support wireless access technologies of the same standard, or may support wireless access standards of different standards.
  • transceiver 505 and the transceiver unit 7013 in FIG. 7 can be used to implement the steps related to receiving and sending in the above method embodiments, for example: receiving secondary base station indication information,
  • the secondary base station indication information is used to indicate that the secondary base station is a secondary base station of the target base station; and send second configuration information to the terminal device.
  • the transceiver 505 and the transceiver unit 7013 are further configured to communicate with the terminal device through the first radio bearer using the first configuration.
  • the transceiver 505 and the transceiver unit 7013 are further configured to receive first indication information from the target base station, where the first indication information is used to instruct to retain the first configuration.
  • the transceiver 505 and the transceiver unit 7013 are further configured to receive the security configuration from the target base station.
  • the transceiver 505 and the transceiver unit 7013 are further configured to receive second indication information from the terminal device, where the second indication information is used to indicate that the second configuration has been completed.
  • the transceiver 505 and the transceiver unit 7013 are further configured to send third indication information to the terminal device, where the third indication information is used to instruct to release the first configuration.
  • 500 in FIG. 5 When 500 in FIG. 5 is used as a network device, its processor 501 and the processing unit 7011 in FIG. 7 can be used to implement the processing-related steps in the above method embodiments, for example, according to the second configuration information
  • the radio bearer performs the second configuration.
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the units is only a logical function division.
  • the units described as separate components may or may not be physically separated.
  • the components shown may or may not be physical units, ie may be located in one place, or may be distributed over multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • the functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned computer-readable storage medium can be any available medium that can be accessed by a computer.
  • the computer-readable medium may include random access memory (RAM), read-only memory (ROM), programmable read-only memory (PROM), Erasable programmable read only memory (erasable PROM, EPROM), electrically erasable programmable read only memory (electrically erasable programmable read only memory, EEPROM), compact disc read-only memory (compact disc read-only memory, CD- ROM), universal serial bus flash disk, removable hard disk, or other optical disk storage, magnetic disk storage medium, or other magnetic storage device, or capable of carrying or storing desired data in the form of instructions or data structures program code and any other medium that can be accessed by a computer.
  • RAM random access memory
  • ROM read-only memory
  • PROM programmable read-only memory
  • EPROM Erasable programmable read only memory
  • EEPROM electrically erasable programmable read only memory
  • compact disc read-only memory compact disc read-only memory
  • CD- ROM compact disc read-only memory
  • universal serial bus flash disk removable hard disk,
  • RAM static random access memory
  • DRAM dynamic random access memory
  • SDRAM synchronous dynamic random access memory
  • double data rate SDRAM double data rate SDRAM
  • DDR SDRAM double data rate SDRAM
  • ESDRAM enhanced synchronous dynamic random access memory
  • SLDRAM synchronous link dynamic random access memory
  • direct rambus RAM direct rambus RAM

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Abstract

本申请涉及一种通信方法及装置。所述方法应用于双连接通信架构下的切换场景，包括：终端设备在从源基站切换到目标基站的过程中，先与目标基站的辅基站建立传输路径，后释放与源基站的辅基站之间的传输路径，以保持切换过程中通信不中断，进而提高终端设备在切换过程中的通信质量以及通信效率。

Description

一种通信方法及装置 技术领域
本申请涉及通信技术领域，尤其涉及一种通信方法及装置。
背景技术
由于单个基站的带宽资源和覆盖范围有限，通过集中多个小区或基站的无线资源来为用户提供服务，更易于满足用户的容量需求和覆盖需求，因此通信系统引入了多连接的通信方式，目前常用的多连接方式为双连接。在双连接(dual connectivity,DC)通信架构中，终端设备同时与两个基站进行通信，基站会为终端设备配置一个主小区组(Master cell group，MCG)和一个辅小区组(Secondary cell group，SCG)，其中MCG是主基站的小区组，主基站一般是作为控制面的锚点基站，SCG是辅基站的小区组。
工作在双连接状态的终端设备如果发生了切换，会在切换过程中释放源辅基站，并断开与源主基站的连接，收到切换命令以后向目标基站发起随机接入并最终接入到目标基站进行通信。在切换过程中终端设备与基站的通信会出现中断，降低通信质量。因此，工作在双连接状态的终端设备如何在切换过程中提升通信质量成为亟需解决的技术问题。
发明内容
本申请实施例提供一种通信方法及装置，用于提高终端设备在切换过程中的通信质量。
第一方面，提供一种通信方法，该方法包括：终端设备从源基站切换到目标基站，所述源基站和所述目标基站有相同或者不同的辅基站，所述终端设备使用第一配置通过第一无线承载与所述辅基站进行通信，所述终端设备接收来自网络侧的第二配置信息，根据所述第二配置信息对所述第一无线承载进行第二配置，保留所述第一配置，所述终端设备使用所述第二配置通过所述第一无线承载与所述辅基站进行通信。在该方案中，终端设备通过在切换过程中先建立与目标辅基站的传输路径、后释放与源辅基站的传输路径，以实现在切换过程中不中断连接，提高通信质量。
该方法可由第一通信装置执行，第一通信装置可以是通信设备或能够支持通信设备实现该方法所需的功能的通信装置，例如芯片。示例性地，所述第一通信装置为终端设备，或者为设置在终端设备中的用于实现终端设备的功能的芯片，或者为用于实现终端设备的功能的其他部件。在下文的介绍过程中，以第一通信装置是终端设备为例。
在一种可选的实施方式中，在使用所述第二配置通过所述第一无线承载与所述辅基站进行通信之后，终端设备释放所述第一配置，也就是说，终端设备在建立与目标辅基站的传输路径之后才释放与源辅基站之间的传输路径，以提高切换过程中的通信质量。
在一种可选的实施方式中，所述第二配置信息包括无线链路控制RLC层配置，分组数据汇聚层协议PDCP层配置和安全配置中的至少一个。
在一种可选的实施方式中，所述第二配置信息承载于来自所述辅基站的信令无线承载SRB3，或者，所述第二配置信息承载于来自所述源基站的切换命令。通过在现有消息中携带第二配置信息可以提高通信系统的配置效率。
在一种可选的实施方式中，终端设备向所述辅基站发送第二指示信息，所述第二指示信息用于指示所述第二配置已经完成。
在一种可选的实施方式中，终端设备接收来自所述辅基站或者来自所述目标基站的第三指示信息，所述第三指示信息用于指示释放所述第一配置。
其中，所述第一配置包括第一PDCP实体与第一RLC实体，所述第一PDCP实体、所述第一RLC实体与第一安全配置相互关联。而对于所述第二配置，在一种可选的实施方式中，所述根据第二配置信息对所述第一无线承载进行第二配置包括根据所述第二配置信息重配置所述第一PDCP实体、建立第二RLC实体并进行第二安全配置，所述第一PDCP实体、所述第二RLC实体与所述第二安全配置相互关联。在另一种可能的实现中，所述根据第二配置信息对所述第一无线承载进行第二配置包括根据所述第二配置信息建立第二PDCP实体、建立第二RLC实体并进行第二安全配置，所述第二PDCP实体、所述第二RLC实体与所述第二安全配置相互关联。再一种可能的实现中，所述根据第二配置信息对所述第一无线承载进行第二配置包括根据所述第二配置信息重配置所述第一PDCP实体、重配置第一RLC实体并进行第二安全配置，所述第一PDCP实体、所述第一RLC实体与所述第二安全配置相互关联。也就是说，终端设备可以根据第二配置信息建立第二传输路径，用于与目标辅基站进行通信，其中第二传输路径关联于第二安全配置，而终端设备与源辅基站通信所通过的第一传输路径时关联于第一安全配置，通过安全配置的区分可以使能切换过程中通信的安全性。
第二方面，提供一种通信方法，该方法包括：辅基站通过第一无线承载与终端设备通信，所述终端设备从源基站切换到目标基站，所述源基站和所述目标基站有共同的所述辅基站，所述辅基站接收辅基站指示信息，所述辅基站指示信息用于指示所述辅基站为目标基站的辅基站，所述辅基站向所述终端设备发送第二配置信息，第二配置信息用于对所述第一无线承载进行第二配置。
该方法可由第二通信装置执行，第二通信装置可以是通信设备或能够支持通信设备实现该方法所需的功能的通信装置，例如芯片。示例性地，所述第二通信装置为网络设备，或者为设置在网络设备中的用于实现网络设备的功能的芯片，或者为用于实现网络设备的功能的其他部件。在下文的介绍过程中，以第二通信装置是辅基站为例。
在终端设备从源基站切换到目标基站的过程中，如果切换前终端设备的辅基站与切换后终端设备的辅基站是同一个基站，那么所述辅基站可以在建立新的传输路径之后再释放旧的传输路径，以提高切换过程中终端设备的通信质量。如果切换前终端设备的辅基站与切换后终端设备的辅基站不是同一个基站，那么可以在终端设备与目标辅基站建立新的传输路径之后，源辅基站再释放旧的传输路径，以提高切换过程中终端设备的通信质量。
在一种可能的实现中，在接收辅基站指示信息之前，辅基站使用第一配置与所述终端设备进行通信。
在一种可能的实现中，在接收辅基站指示信息之前，所述辅基站接收来自所述目标基站的第一指示信息，所述第一指示信息用于指示保留所述第一配置，所述第一指示信息可以包括于第二配置信息，或者与第二配置信息承载于同一条消息。
在一种可能的实现中，所述辅基站接收来自所述目标基站的安全配置。
在一种可能的实现中，所述第二配置信息包括无线链路控制RLC层配置，分组数据汇 聚层协议PDCP层配置和安全配置中的至少一个。
在一种可能的实现中，所述第二配置信息包括所述第一指示信息，所述第一指示信息用于指示保留所述第一配置。
在一种可能的实现中，所述第二配置信息承载于来自所述辅基站的信令无线承载SRB3，或者，所述第二配置信息承载于来自所述源基站的切换命令。
在一种可能的实现中，所述辅基站接收来自所述终端设备的第二指示信息，所述第二指示信息用于指示所述第二配置已经完成。
在一种可能的实现中，所述辅基站向所述终端设备发送第三指示信息，所述第三指示信息用于指示释放所述第一配置。
第三方面，提供一种通信方法，所述方法可以适用于源基站，该方法包括：终端设备从所述源基站切换到目标基站，所述源基站和所述目标基站有共同的辅基站，源基站向所述目标基站发送第一指示信息，所述第一指示信息用于指示在切换过程中保留所述第一配置，所述源基站向所述目标基站发送切换请求消息，所述源基站接收来自所述目标基站的切换完成消息。通过向目标基站发送第一指示信息，可以指示在切换过程中先保留与源辅基站的第一配置(第一传输路径)，待新的传输路径建立完成后再释放，以提高切换过程中终端设备的通信效率。
该方法可由第三通信装置执行，第三通信装置可以是通信设备或能够支持通信设备实现该方法所需的功能的通信装置，例如芯片。示例性地，所述第三通信装置为网络设备，或者为设置在网络设备中的用于实现网络设备的功能的芯片，或者为用于实现网络设备的功能的其他部件。在下文的介绍过程中，以第三通信装置是源基站为例。
在一种可能的实现中，源基站向所述目标基站发送辅基站指示信息，所述辅基站指示信息用于指示所述辅基站为目标基站的辅基站。
在一种可能的实现中，所述辅基站指示信息包括辅基站的标识信息和/或所述辅基站对应小区的频点信息。
在一种可能的实现中，所述第一指示信息和/或所述辅基站指示信息承载于所述切换请求消息。
第四方面，提供一种通信方法，所述方法可以适用于目标基站，该方法包括终端设备从源基站切换到所述目标基站，所述源基站和所述目标基站有共同的辅基站，目标基站接收来自所述源基站的第一指示信息，所述第一指示信息用于指示在切换过程中保留所述第一配置，目标基站向所述辅基站发送辅基站指示信息，所述辅基站指示信息用于指示所述辅基站为目标基站的辅基站。通过接收来自源基站的第一指示信息，可以确定在切换过程中先保留与源辅基站的第一配置(第一传输路径)，待终端设备与目标辅基站之间新的传输路径建立完成后再释放，以提高切换过程中终端设备的通信效率。
该方法可由第四通信装置执行，第四通信装置可以是通信设备或能够支持通信设备实现该方法所需的功能的通信装置，例如芯片。示例性地，所述第四通信装置为网络设备，或者为设置在网络设备中的用于实现网络设备的功能的芯片，或者为用于实现网络设备的功能的其他部件。在下文的介绍过程中，以第四通信装置是目标基站为例。
在一种可能的实现中，所述目标基站根据来自所述源基站的指示信息确定所述辅基站，或者根据先验信息确定所述辅基站。
在一种可能的实现中，所述辅基站指示信息包括辅基站的标识信息和/或所述辅基站对应小区的频点信息。
在一种可能的实现中，所述目标基站向所述辅基站发送所述第一指示信息。
在一种可能的实现中，所述目标基站向所述辅基站发送安全配置。
在一种可能的实现中，所述目标基站向所述辅基站发送第三指示信息，所述第三指示信息用于指示释放所述第一配置。第五方面，提供一种通信装置。该通信装置可以为上述第一方面所述的终端设备，或者为配置在所述终端设备中的电子设备(例如芯片)，或者为包括所述终端设备的较大设备。所述终端设备包括用于执行上述方法的相应的手段(means)或模块。例如，所述通信装置：包括处理单元(有时也称为处理模块)和收发单元(有时也称为收发模块)。
又例如，所述通信装置包括：处理器，与存储器耦合，用于执行存储器中的指令，以实现上述第一方面中终端设备所执行的方法。可选的，该通信装置还包括其他部件，例如，天线，输入输出模块，接口等等。这些部件可以是硬件，软件，或者软件和硬件的结合。
第六方面，提供一种通信装置。所述通信装置可以为上述第二方面所述的网络设备。所述通信装置具备上述辅基站的功能。所述通信装置例如为基站，或为基站中的基带装置，或者为芯片。一种可选的实现方式中，所述通信装置包括基带装置和射频装置。另一种可选的实现方式中，所述通信装置包括处理单元(有时也称为处理模块)和收发单元(有时也称为收发模块)。
在一种可选的实现方式中，所述通信装置包括处理单元，用于与存储单元耦合，并执行存储单元中的程序或指令，使能所述通信装置执行上述辅基站的功能。
第七方面，提供一种通信装置。所述通信装置可以为上述第三方面所述的网络设备。所述通信装置具备上述源基站的功能。所述通信装置例如为基站，或为基站中的基带装置，或者为芯片。一种可选的实现方式中，所述通信装置包括基带装置和射频装置。另一种可选的实现方式中，所述通信装置包括处理单元(有时也称为处理模块)和收发单元(有时也称为收发模块)。
在一种可选的实现方式中，所述通信装置包括处理单元，用于与存储单元耦合，并执行存储单元中的程序或指令，使能所述通信装置执行上述源基站的功能。
第八方面，提供一种通信装置。所述通信装置可以为上述第四方面所述的网络设备。所述通信装置具备上述目标基站的功能。所述通信装置例如为基站，或为基站中的基带装置，或者为芯片。一种可选的实现方式中，所述通信装置包括基带装置和射频装置。另一种可选的实现方式中，所述通信装置包括处理单元(有时也称为处理模块)和收发单元(有时也称为收发模块)。
在一种可选的实现方式中，所述通信装置包括处理单元，用于与存储单元耦合，并执行存储单元中的程序或指令，使能所述通信装置执行上述目标基站的功能。
第九方面，提供一种通信系统，包括第五方面所述的通信装置、第六方面所述的通信装置，进一步，还包括第七方面所述的通信装置和/或第八方面所述的通信装置。
第十方面，提供一种计算机可读存储介质，所述计算机可读存储介质用于存储计算机程序或指令，当其被运行时，使得上述第一方面至第四方面或者其中任意一种可能的实施方式中所述的方法被实现。
第十一方面，提供一种包含指令的计算机程序产品，当其在计算机上运行时，使得上述第一方面至第四方面或者其中任意一种可能的实施方式中所述的方法被实现。
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图1为无线接入网侧协议栈的一种示意图；
图2A为本申请实施例的一种应用场景示意图；
图2B为本申请实施例的又一种应用场景示意图；
图3A为本申请实施例提供的一种通信方法的流程图；
图3B为本申请实施例提供的又一种通信方法的流程图；
图4A为本申请实施例提供的一种协议栈示意图；
图4B为本申请实施例进行第二配置的一种示意图；
图4C为本申请实施例进行第二配置的另一种示意图；
图4D为本申请实施例进行第二配置的再一种示意图；
图5为本申请实施例提供的通信装置的一种示意性框图；
图6为本申请实施例提供的终端设备的一种示意性框图；
图7为本申请实施例提供的网络设备的一种示意性框图。
具体实施方式
为了使本申请实施例的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施例作进一步地详细描述。
以下，对本申请实施例中的部分用语进行解释说明，以便于本领域技术人员理解。
1)终端设备，包括向用户提供语音和/或数据连通性的设备，具体的，包括向用户提供语音的设备，或包括向用户提供数据连通性的设备，或包括向用户提供语音和数据连通性的设备。例如可以包括具有无线连接功能的手持式设备、或连接到无线调制解调器的处理设备。该终端设备可以经无线接入网(radio access network，RAN)与核心网进行通信，与RAN交换语音或数据，或与RAN交互语音和数据。该终端设备可以包括用户设备(user equipment，UE)、无线终端设备、移动终端设备、设备到设备通信(device-to-device，D2D)终端设备、车到一切(vehicle to everything，V2X)终端设备、机器到机器/机器类通信(machine-to-machine/machine-type communications，M2M/MTC)终端设备、物联网(internet of things，IoT)终端设备、签约单元(subscriber unit)、签约站(subscriber station)，移动站(mobile station)、远程站(remote station)、接入点(access point，AP)、远程终端(remote terminal)、接入终端(access terminal)、用户终端(user terminal)、用户代理(user agent)、或用户装备(user device)等。例如，可以包括移动电话(或称为“蜂窝”电话)，具有移动终端设备的计算机，便携式、袖珍式、手持式、计算机内置的移动装置等。例如，个人通信业务(personal communication service，PCS)电话、无绳电话、会话发起协议(session initiation protocol，SIP)话机、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、等设备。还包括受限设备，例如功耗较低的设备，或存储能力有限的设备，或计算能力有限的设备等。例如包括条码、射频识别(radio frequency identification，RFID)、传感器、全球定位系统(global positioning system，GPS)、激光扫描 器等信息传感设备。
作为示例而非限定，在本申请实施例中，该终端设备还可以是可穿戴设备。可穿戴设备也可以称为穿戴式智能设备或智能穿戴式设备等，是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称，如眼镜、手套、手表、服饰及鞋等。可穿戴设备即直接穿在身上，或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备，更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功能全、尺寸大、可不依赖智能手机实现完整或者部分的功能，例如：智能手表或智能眼镜等，以及只专注于某一类应用功能，需要和其它设备如智能手机配合使用，如各类进行体征监测的智能手环、智能头盔、智能首饰等。
而如上介绍的各种终端设备，如果位于车辆上(例如放置在车辆内或安装在车辆内)，都可以认为是车载终端设备，车载终端设备例如也称为车载单元(on-board unit，OBU)。
本申请实施例中，终端设备还可以包括中继(relay)。或者理解为，能够与基站进行数据通信的都可以看作终端设备。
本申请实施例中，用于实现终端设备的功能的装置可以是终端设备，也可以是能够支持终端设备实现该功能的装置，例如芯片系统，该装置可以被安装在终端设备中。本申请实施例中，芯片系统可以由芯片构成，也可以包括芯片和其他分立器件。本申请实施例提供的技术方案中，以用于实现终端的功能的装置是终端设备为例，描述本申请实施例提供的技术方案。
2)网络设备，例如包括接入网(access network，AN)设备，例如基站(例如，接入点)，可以是指接入网中在空口通过一个或多个小区与无线终端设备通信的设备，或者例如，一种车到一切(vehicle-to-everything，V2X)技术中的网络设备为路侧单元(road side unit，RSU)。基站可用于将收到的空中帧与IP分组进行相互转换，作为终端设备与接入网的其余部分之间的路由器，其中接入网的其余部分可包括IP网络。RSU可以是支持V2X应用的固定基础设施实体，可以与支持V2X应用的其他实体交换消息。网络设备还可协调对空口的属性管理。例如，网络设备可以包括LTE系统或高级长期演进(long term evolution-advanced，LTE-A)中的演进型基站(NodeB或eNB或e-NodeB，evolutional Node B)，或者也可以包括第五代移动通信技术(the 5th generation，5G)NR系统(也简称为NR系统)中的下一代节点B(next generation node B，gNB)或者也可以包括云接入网(cloud radio access network，Cloud RAN)系统中的集中式单元(centralized unit，CU)和分布式单元(distributed unit，DU)，本申请实施例并不限定。
网络设备还可以包括核心网设备，核心网设备例如包括访问和移动管理功能(access and mobility management function，AMF)或用户平面功能(user plane function，UPF)等。本申请实施例由于主要涉及的是接入网，因此在后文中如无特殊说明，则所述的网络设备均是指接入网设备。
本申请实施例中，用于实现网络设备的功能的装置可以是网络设备，也可以是能够支持网络设备实现该功能的装置，例如芯片系统，该装置可以被安装在网络设备中。在本申请实施例提供的技术方案中，以用于实现网络设备的功能的装置是网络设备为例，描述本申请实施例提供的技术方案。
3)无线接入网侧协议栈，网络设备和终端设备具有对应的协议栈结构，以用于相互通 信。例如图1示出了以基站和UE为例的协议栈的部分结构，用户面协议栈结构可以包括无线资源控制(radio resource control，RRC)层、业务数据适配(service data adaptation protocol,SDAP)层、分组数据汇聚层协议(packet data convergence protocol，PDCP)层、无线链路控制(radio link control，RLC)层、媒体接入控制(media access link control，MAC)和物理层等，其中RRC层和SDAP层图1中未示出。图1中的箭头示意了数据传输方向，下行数据经过SDAP层的映射以后，首先到达基站的PDCP层，经过基站的PDCP层的处理以后传输到RLC层和MAC层，经过处理之后，从物理层发送出去，通过空口传输给UE侧。相应的，UE侧的各个协议层按照与基站相反的处理顺序对数据包依次进行对应的处理。在基站和UE侧可以形象地将各层对数据包的处理结合起来称为无线承载，对于无线承载里的每个数据，都需要经过各个层的处理，每个层都有相应的功能实体来执行相应的功能，比如PDCP层中由PDCP实体来执行处理功能。每个无线承载配置里面会包含一个PDCP实体配置，同时一个无线承载配置会关联至少一个RLC实体配置，每个RLC实体配置对应一个逻辑信道配置。
4)传输路径，在本申请中，不同的传输路径可以是指不同的无线承载，也可以指同一无线承载中不同的协议实体处理过程，例如在发送端，同一无线承载包括一个PDCP实体和两个RLC实体(例如为第一RLC实体和第二RLC实体)，如果数据包经过PDCP处理以后，传输到其中第一RLC实体进行处理，并通过空口发送出去称为一个传输路径，而如果数据包经过PDCP处理以后，传输到第二RLC实体进行处理，并通过空口发送出去称为另外一个传输路径。而每个传输路径在接收端分别由对应的的实体对数据包进行对等处理。对应于同一个PDCP实体的传输路径属于一个无线承载，也就是说，在一个无线承载中可以有不同的多个传输路径。
5)本申请实施例中的术语“系统”和“网络”可被互换使用。“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“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的情况，其中A,B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。
以及，除非有相反的说明，本申请实施例提及“第一”、“第二”等序数词是用于对多个对象进行区分，不用于限定多个对象的大小、内容、顺序、时序、优先级或者重要程度等。例如，第一配置信息和第二配置信息，只是为了区分不同的配置信息，而并不是表示这两个配置的大小、内容、发送顺序、优先级或者重要程度等的不同，也不限定两个配置信息是否承载于相同或者不同的消息。
本申请实施例提供的技术方案可以应用于第四代移动通信技术(the 4th generation，4G)系统中，例如LTE系统，或可以5G系统中，例如NR系统，或者还可以应用于下一代移动通信系统或其他类似的通信系统，具体的不做限制。
请参见图2A，为本申请实施例的一种应用场景。图2A包括网络设备1、网络设备2、网络设备3和终端设备。网络设备1为终端设备的主基站，网络设备2为终端设备的辅基站，例如，终端设备可以处于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)。网络设备2部署在网络设备1和网络设备3的覆盖范围之内， 进而当终端设备从网络设备1切换到网络设备3后，网络设备2仍然可以作为终端设备的辅基站，例如，网络设备2可以为NR基站，网络设备1和网络设备3可以为LTE基站，NR基站可以作为多个LTE基站的辅基站，并与多个LTE基站分别组成EN-DC架构为UE提供通信服务。应理解，图2A仅为一种可能的应用场景，本申请实施例提供的通信方法还可以适用于源基站与目标基站不共用辅基站的通信架构中，也就是说，在终端设备切换之前和切换之后可以通过不同的辅基站获取服务，例如图2B所示，切换前网络设备1和网络设备2组成EN-DC为UE服务，切换后网络设备3和网络设备4组成EN-DC为UE服务，网络设备2和网络设备4是不同的辅基站。网络设备1-4可以工作在E-UTRA系统中，或者工作在NR系统中，或者工作在下一代通信系统或其他通信系统中，网络设备1-4可以工作在相同的通信系统中，例如均工作在E-UTRA系统中，或者，也可以工作在不同的通信系统中。
图2A和图2B中的网络设备例如为基站。其中，网络设备在不同的系统对应不同的设备，例如在4G系统中可以对应eNB，在5G系统中对应5G中的接入网设备，例如gNB。当然本申请实施例所提供的技术方案也可以应用于未来的移动通信系统中，因此图2A和图2B中的网络设备也可以对应未来的移动通信系统中的网络设备。图2A和图2B以网络设备是基站为例，实际上参考前文的介绍，网络设备还可以是RSU等设备。另外，图2A和图2B中的终端设备以手机为例，实际上根据前文对于终端设备的介绍可知，本申请实施例的终端设备不限于手机。
在移动通信系统中，连接态UE(处于RRC连接态的UE)的移动性管理是由网络设备控制的。源基站向连接态UE发送RRC配置消息，UE根据RRC配置消息对一系列小区进行测量，当满足测量上报条件以后，向当前连接的源基站上报测量结果，源基站根据测量结果确定UE是否要切换，当确定UE需要切换时，向目标基站发送切换请求消息，目标基站根据其通信能力确定是否允许UE接入，并向源基站发送切换请求确认消息，允许接入时，会在切换请求确认消息中携带目标基站的配置信息，源基站在接收到切换确认消息后，通过RRC重配置消息(又称切换命令)将目标基站的配置信息发送给UE，具体的，切换命令中可以包括接入目标小区所需的随机接入资源等信息。UE接收切换命令之后，会断开与源基站的连接，并通过随机接入与目标小区建立RRC连接，也就是说，在切换过程中，UE与网络设备的通信会出现中断。传统切换过程中，在UE收到切换命令后，会断开跟源基站的连接，并通过读取系统消息与目标基站的小区进行下行同步，然后通过随机接入与目标小区进行上行同步，在此过程中UE无法进行通信，因此，在成功接入目标基站之前，UE收发数据会出现中断。为了支持超高可靠低时延通信(ultra-reliable low-latency communication,URLLC)等业务短时延的要求，5G还提出了0ms中断的切换过程，例如双激活协议栈(Dual Active Protocol Stack,DAPS)。具体的，在成功接入目标基站之前，UE通过与源基站的通信链路进行通信；而在成功接入目标基站之后，UE通过与目标基站的通信链路进行通信，并释放与源基站的通信链路，这样可以实现整个切换过程中数据通信不中断。
而双连接通信结构还没有引入DAPS或者其他平滑切换的方法，处于双连接状态的UE在切换时会断开与源主基站(UE切换前的主基站)和源辅基站(UE切换前的辅基站)的连接，在与目标主基站(UE切换后的主基站)建立连接以后，添加目标辅基站(UE切换 后的辅基站)。而在添加目标辅基站以后，UE才能与目标辅基站进行通信。因此在切换过程中UE与辅基站的通信会产生中断，而在EN-DC架构下，大数据量业务大多都是通过辅基站(NR基站)进行传输的，所以与辅基站的通信中断会会严重影响这些业务的用户体验。
鉴于此，提供本申请实施例的技术方案。在本申请实施例中，处于双连接的终端设备在切换过程中不中断与源辅基站的通信，在与目标辅基站建立传输路径之后再释放与源辅基站之间的传输路径，进而提升终端设备与辅基站的通信质量。
为了便于介绍，在下文中，以方法由源基站、目标基站、辅基站和UE来执行为例，这里假设源辅基站和目标辅基站为同一个辅基站。所述的源基站可以是图2所示的网络架构中的网络设备1，辅基站可以是图2所示的网络架构中的网络设备2，目标基站可以是图2所示的网络架构中的网络设备3，UE可以是图2所示的网络架构中的终端设备。
如图3A所示，在本申请实施例中UE处于双连接状态，源基站为UE的主基站，源基站或者辅基站发送第一配置信息给UE，UE根据第一配置信息对第一无线承载进行第一配置，UE使用第一配置通过第一无线承载与辅基站进行通信(以下简称为使用第一配置与辅基站进行通信)。在UE从源基站切换到目标基站的过程中，UE接收来自辅基站的第二配置信息，并根据第二配置信息对第一无线承载进行第二配置，同时保留第一配置，其中辅基站的第二配置信息是由辅基站发给UE或者目标基站通过源基站转发给UE的。UE在通过第二配置与辅基站通信之前可以保留并继续使用第一配置与辅基站进行通信，在使用第二配置与辅基站通信之后可以释放第一配置。
通过本申请实施例提供的通信方法，针对同一无线承载，处于双连接的终端设备在切换过程中可以先与辅基站建立新的传输路径并使用新的传输路径进行通信，在使用新的传输路径通信之前，保留旧的传输路径并使用旧的传输路径进行通信，从而实现切换过程中不中断与辅基站的通信，提升UE与辅基站的通信质量。
需要说明的是，在本申请实施例中，不同的配置可以对应同一无线承载不同的传输路径，例如第一配置对应第一传输路径，第二配置对应第二传输路径。另一种可能的方式是，不同的配置对应不同的无线承载，例如第一配置对应第一无线承载，第二配置对应第二无线承载，分别为第一传输路径和第二传输路径，其中第一无线承载和第二无线承载可以属于相同的辅基站或者属于不同的辅基站。为了阐述方便，本实施例以同一无线承载不同传输路径的情况为例说明技术方案。
其中，所述第一配置(或第二配置)是指对MAC实体、RLC实体和/或PDCP实体的建立或者重配置，进一步还可以包括安全配置，关于第一配置和第二配置的含义后文将详细介绍。所述使用第一配置(或第二配置)与辅基站通信可以理解为：通过建立(或者重配置)的MAC实体、RLC实体、PDCP实体，与辅基站之间形成的传输路径进行通信传输。应理解，对于同一个第一无线承载可以有多个配置，例如第一配置和第二配置，不同的配置可以对应相同或者不同的传输路径，因此UE可以使用多个传输路径通过第一无线承载与辅基站之间进行通信。
接下来将详细介绍本申请提供的通信方法，如图3B所示，包括步骤S301～S308。
步骤S301，UE与源基站和辅基站建立双连接，使用第一配置通过第一无线承载与辅基站进行通信，所述第一配置是UE根据第一配置信息对第一无线承载进行的配置。
步骤S302，源基站向目标基站发送切换请求消息，相应的，目标基站接收来自所述源基站的切换请求消息，所述切换请求消息用于请求将UE从源基站切换到目标基站。
步骤S303，目标基站向辅基站发送辅基站指示信息，所述辅基站指示信息用于添加所述辅基站为目标基站的辅基站，进一步，目标基站向辅基站发送第一指示信息。
步骤S304，辅基站向UE发送第二配置信息，第二配置信息用于对所述第一无线承载进行第二配置，相应的，UE接收来自辅基站的第二配置信息。
步骤S305，UE根据所述第二配置信息对所述第一无线承载进行第二配置，保留所述第一配置。
步骤S306，UE使用所述第二配置与所述辅基站进行通信。
步骤S307，UE释放第一配置。
步骤S308，UE向目标基站发送切换完成消息，相应的，目标基站接收来自UE的切换完成消息。
通过本申请实施例提供的通信方法，对于双连接服务的终端设备，以一个无线承载的通信为例，在终端设备切换过程中可以先与辅基站建立新的传输路径，后释放旧的传输路径，从而实现切换过程中终端设备与辅基站的通信不中断，提升UE的通信质量，接下来将详细阐述以上每一步骤的执行方法。
对于步骤S301，UE与源基站和辅基站建立双连接，使用第一配置通过第一无线承载与辅基站进行通信，所述第一配置是UE根据第一配置信息对第一无线承载进行的配置。
UE处于双连接状态，可以同时与源基站和辅基站进行通信，对于数据发送来说一般采用无线承载进行，对于不同的业务来说，UE与基站可以建立多个无线承载进行通信，以第一无线承载为例，UE使用第一配置通过第一无线承载与辅基站进行通信，所述第一配置是UE根据第一配置信息对第一无线承载进行的配置，也就是说，第一配置是UE在切换之前对应于源辅基站(源基站的辅基站)的配置，或者理解为，第一配置是UE用于与源辅基站进行通信所需要的配置。所述使用第一配置通过第一无线承载与辅基站进行通信可以理解为切换之前UE与辅基站进行通信所使用的第一传输路径，第一配置信息可以理解为在切换之前基站向UE发送的关于第一传输路径的配置信息。需要说明的是，UE与基站可以建立多个无线承载进行通信，也可以理解为第一无线承载包括至少一个无线承载，而第一配置是对其中的至少一个无线承载进行配置。所述第一配置包括第一PDCP实体与第一RLC实体，所述第一PDCP实体、所述第一RLC实体与第一安全配置相互关联。UE使用第一配置通过第一无线承载与辅基站进行通信可以理解为，UE的数据包经过第一PDCP实体处理以后，传输到第一RLC实体进行处理，并通过空口发送出去，其中第一安全配置用于保证传输安全性。
在一种可能的实现中，所述方法还包括接收来自网络设备的第一配置信息，所述网络设备可以是源基站或者辅基站。
在一种可能的实现中，所述方法还包括根据第一配置信息对第一无线承载进行第一配置，例如，UE根据所述第一配置信息建立第一无线承载，具体的，建立第一PDCP实体与第一RLC实体，并进行第一安全配置，所述第一PDCP实体、所述第一RLC实体与所述第一安全配置相互关联。UE根据第一配置信息建立完成第一无线承载以后，就可以使用第一 配置通过第一无线承载与辅基站进行通信，或者说通过第一传输路径与辅基站进行通信。其中，所述第一配置信息是用于配置在UE切换之前与辅基站之间传输路径的配置信息，但并不限定为UE与辅基站第一次通信的传输路径配置信息，例如在进行第一配置之前，UE使用其他配置通过第一无线承载与辅基站通信，但在切换前，已经根据第一配置信息对第一无线承载进行了第一配置，UE处于使用第一配置通过第一无线承载与辅基站通信的状态。
对于步骤S302，源基站向目标基站发送切换请求消息，相应的，目标基站接收来自所述源基站的切换请求消息，所述切换请求消息用于请求将UE从源基站切换到目标基站。
可选的，所述方法还包括步骤S3021，源基站向目标基站发送辅基站信息，相应的，目标基站接收来自所述源基站的辅基站信息，目标基站根据辅基站信息确定是否在切换以后使用相同的辅基站，与目标基站组成双连接为UE提供通信服务。具体的，目标基站可以通过以下两种方式确定辅基站。
在第一种可能的实现中，辅基站信息为参考信息，由目标基站确定切换后的目标辅基站。例如，源基站向目标基站发送源基站的辅基站信息，辅基站信息指示了源基站的辅基站为基站A，辅基站信息还可以进一步指示基站A的位置信息，标识信息或者频率信息，目标基站可以根据辅基站信息确定切换后是否将该源辅基站作为目标基站的辅基站；又例如，辅基站信息用于指示UE配置了双连接，目标基站进一步根据先验信息确定所述目标基站对应的辅基站，其中，先验信息可以是目标基站预先通过Xn接口获得的，或者，先验信息可以是通过操作管理维护(operation administration and maintenance,OAM)预先配置的。目标基站可以通过来自源基站的辅基站信息来灵活决策目标辅基站，为UE的通信服务提高质量。
在第二种可能的实现中，辅基站信息用于指示目标基站可以继续使用源辅基站作为目标辅基站，目标基站接收到源辅基站指示信息以后，可以根据自身情况决定是否接受源辅基站作为目标辅基站。其中，源辅基站信息包括源辅基站标识信息、位置信息或者频率信息，目标基站确定该辅基站标识信息所对应的辅基站作为目标辅基站。源基站可以通过辅基站信息来指定目标基站的辅基站，增加配置灵活性。
可选的，所述方法还包括步骤S3022，源基站向目标基站发送第一指示信息，所述第一指示信息用于指示保留或者不释放第一配置或者传输路径，进一步还可以指示保留哪些无线承载的配置；或者所述第一指示信息用于指示在切换过程中不中断辅基站与UE之间的通信，相应的，目标基站接收来自所述源基站的第一指示信息。也就是说，源基站可以通过第一指示信息来指示切换过程中不中断与辅基站的通信，以提高UE的通信质量，源基站可以对于不同需求的UE做出不同的控制，例如，仅为业务质量要求高的UE提供在切换过程中不中断的服务，对于业务质量要求低的UE不提供所述不中断的服务，以实现合理调配通信系统的资源。所述第一指示信息可以包括于第二配置信息，或者与第二配置信息承载于同一条消息，第一指示信息可以通过显式或隐式两种方式来实现。
在第一种可能的实现中，第一指示信息是通过新增信元(information element,IE)，指示域或者字段来显式地指示在切换过程中不中断某些无线承载的通信或者不中断全部无线承载的通信。
在第二种可能的实现中，预先定义或者配置在切换过程中不中断通信的UE标识、业务 标识、服务质量(quality of service,QoS)参数和/或源基站标识，目标基站可以通过切换请求中的UE标识、业务标识、QoS参数和/或源基站标识来判断，此次切换过程中是否有无线承载需要保证业务传输不中断。
可选的，所述方法还包括步骤S3023，源基站向目标基站发送UE的测量结果，所述测量结果是UE对来自辅基站的参考信号进行测量得到的，所述测量结果用于指示UE与所述辅基站的信道质量。相应的，目标基站接收来自源基站的UE的测量结果，进一步，目标根据测量结果确定是否在切换过程中保持与辅基站的通信不中断。例如，目标基站根据测量结果判断该辅基站与UE的信道质量满足预设的门限或者该辅基站与UE的信道质量在所有候选辅基站中排名较优，例如排名第一或者排名前N，目标基站可以决定继续将该辅基站添加为目标辅基站，即保持UE与辅基站的通信不中断，其中N为预配置的或者预定义的。
需要说明的是，上述辅基站信息，第一指示信息和UE的测量结果中的至少一个可以承载于切换请求消息，也可以承载于现有的其他消息或者通过单独的消息发送，本申请不限定切换请求消息、辅基站信息、第一指示信息和UE的测量结果是否在同一消息中发送。
对于步骤S303，目标基站向辅基站发送辅基站指示信息，所述辅基站指示信息用于指示所述辅基站为目标基站的辅基站，或者指示添加所述辅基站为目标辅基站。
目标基站在确定辅基站之后，向辅基站发送指示信息，用于指示该辅基站，在UE切换之后，作为辅基站与目标基站为UE提供双连接通信服务，该辅基站可以是源辅基站或者不同于源辅基站的其他辅基站。
可选的，所述方法还包括步骤S3031，目标基站向辅基站发送第一指示信息，第一指示信息用于指示保留第一无线承载的第一配置或者保留第一传输路径，或者在切换过程中不中断UE与辅基站的通信，具体的，第一指示信息可以包括UE标识，以单独指定不中断通信服务的UE，还可以包括无线承载标识，以单独指定不中断的无线承载，实现灵活控制。所述第一指示信息可以包括于第二配置信息，或者与第二配置信息承载于同一条消息。
可选的，所述方法还包括步骤S3032，目标基站可以向辅基站发送安全配置，所述安全配置用于指示辅基站与UE建立新的传输路径时应用的安全配置，所述安全配置包括安全密钥信息和/或安全算法信息，也可以包括推到新安全参数所需要的输入参数，例如标识信息或者频率信息。目标基站可以通过向辅基站发送安全配置来指示UE在切换之后使用新传输路径所使用的的安全配置参数，实现灵活调度。
对于步骤S304，辅基站向UE发送第二配置信息，第二配置信息用于对所述第一无线承载进行第二配置，相应的，UE接收来自辅基站的第二配置信息。
如上文所述，第一无线承载包括至少一个无线承载，第二配置是对其中的至少一个无线承载进行配置，也就是说，第二配置信息可以包括至少一个无线承载的配置信息。
辅基站可以使用第一配置通过第一无线承载将第二配置信息发送给UE，或者辅基站将第二配置信息发送给源基站，由源基站发送给UE，或者辅基站将第二配置信息发送给目标基站，由目标基站发送给源基站，然后通过源基站发送给UE。
在步骤S304之前，还可以包括步骤S3041：辅基站确定第二配置信息，也就是说，辅基站确定UE在切换之后的传输路径的配置信息。具体的，第二配置信息包括无线链路控制 RLC层配置，分组数据汇聚层协议PDCP层配置和安全配置中的至少一个，用来配置第一无线承载的第二传输路径(可以理解为第二配置)，其中，RLC层配置用于配置第二传输路径的RLC实体，PDCP层配置用于配置第二传输路径的PDCP实体，安全配置用于配置应用于第二传输路径的安全参数，后文中步骤S305将结合第二配置的配置方法对第二配置信息进行详细说明。
可选的，第二配置信息还包括指示信息，在一种可能的实现中，所述指示信息用于指示根据第二配置信息配置完成的第一无线承载的类型，例如，所述类型可以为辅基站双激活无线承载或者辅基站双路径无线承载。所述类型的无线承载的配置方法可以为预定义的或者预配置的，例如所述所述类型的无线承载可以对原有的PDCP实体进行重配置，保留原有的RLC实体并另外建立新的RLC实体。具体的，第二配置信息还可以包括第四指示信息，所述第四信息用于指示UE保留第一配置并根据第二配置信息来对第一无线承载进行第二配置，例如所述第四指示信息与第一配置信息相关联，当辅基站向UE发送第二配置信息和第一标识时，用于指示UE对于第一标识所对应的第一无线承载：保留原有配置，并根据第二配置信息对其进行第二配置。进一步的，通过第四指示信息，辅基站可以指示第二配置信息不包括第二配置对应的全部配置信息，进而UE可以结合现有配置或者复用现有的实体来对第一无线承载进行重配置，例如可以仅发送有差异的参数信息，以节省信令传输消耗。
可选的，所述方法还包括步骤S3042，辅基站向UE发送第一指示信息，所述第一指示信息用于指示保留所述第一配置，或者用于指示在切换过程中不中断辅基站与UE之间的通信，相应的，UE接收来自辅基站的第一指示信息。所述第一指示信息的作用和指示方式请参考步骤S3022中的相关说明。
上述第二配置信息和/或第一指示信息可以承载于信令无线承载SRB3，也就是说，辅基站可以在SRB3中传输第二配置信息。或者，辅基站也可以将第二配置信息和/或第一指示信息发送给源基站，由源基站发送给UE，例如源基站可以通过切换命令来传输第二配置信息和/或第一指示信息或者通过其他信令发送。或者辅基站也可以将第二配置信息和/或第一指示信息发送给目标基站，目标基站发送给源基站，由源基站发送给UE，例如源基站可以通过切换命令来传输第二配置信息和/或第一指示信息或者通过其他信令发送。
对于步骤S305，UE根据所述第二配置信息对所述第一无线承载进行第二配置，保留所述第一配置。
所述第二配置是指UE根据第二配置信息对第一无线承载进行的配置，也就是说，第二配置是UE对应于目标辅基站(目标基站的辅基站)的配置，或者理解为，第二配置是UE用于在切换之后与目标辅基站进行通信所需要的配置，所述进行第二配置也可以理解为UE根据第二配置信息重配置与辅基站的传输路径。其中，保留所述第一配置，可以理解为终端设备继续使用第一配置通过第一无线承载与所述辅基站进行通信，或者暂时不释放第一配置，以备与辅基站继续通信。接下来将结合图4A来阐述UE对所述第一无线承载进行第二配置的具体方法：
在图4A-4D中，虚线框中为终端设备的协议栈示意图，其中左侧一列表示终端设备在切换之前与网络设备1通信时所使用的协议栈，右侧一列表示终端设备在切换之后与网络 设备3通信时所使用的协议栈，中间一列表示终端设备在切换前后以及切换过程中与网络设备2通信的协议栈。其中终端设备可以例如为UE，网络设备1例如为源基站，网络设备2例如为辅基站，网络设备3例如为目标基站。
如前所述，UE侧协议栈包括PDCP实体、RLC实体、MAC实体和PHY实体，在切换前，UE使用第一配置通过第一传输路径与辅基站进行通信，所述第一传输路径为图4A中数据经由PDCP实体1、RLC实体1、MAC实体和PHY实体处理后通过空中接口传输到网络设备2(源辅基站)的传输路径。UE根据所述第二配置信息对所述第一无线承载进行第二配置，形成第一传输路径之外的第二传输路径，包括根据安全配置来配置安全密钥或者安全算法，进而第一传输路径和第二传输路径可以对应不同的安全配置，所述安全配置用于对数据包进行安全处理，包括加密、解密、完整性保护、完整性验证，以实现通信传输的安全性，这是因为辅基站的安全配置与主基站相关联，同一个基站作为源基站的辅基站时和作为目标基站的辅基站时所使用的安全配置是不同的，所以对于第一传输路径和第二传输路径配置不同的安全配置可以使数据通信正确进行。进一步，UE还可以根据第二配置建立新的RLC实体和/或PDCP实体，或者重配置(reconfigure)现有的RLC实体和/或PDCP实体。
在第一种可能的实现中，如图4B所示，UE根据第二配置信息建立(establish)新的RLC实体2，并根据第二配置信息重配置PDCP实体1，第二传输路径对应于PDCP实体1、RLC实体2和MAC实体、PHY实体形成的传输路径，其中，UE还根据第二配置信息中的安全配置为PDCP实体1配置新的安全配置2，当PDCP实体1通过第一传输路径传输数据时应用旧的安全配置1，当PDCP实体1通过第一传输路径传输数据时应用新的安全配置2，以实现切换前后数据传输的安全性。具体的，UE根据第二配置信息将RLC实体1和RLC实体2与PDCP实体1关联起来，从而使得经过RLC实体1和RLC实体2处理后的数据包可以递交给PDCP实体1处理；进一步，UE需要根据第二配置信息将RLC实体1与旧的安全配置1关联起来，将RLC实体2与新的安全配置2关联起来，从而使得经过RLC实体1处理后的数据包在PDCP实体1中使用旧的安全配置1进行处理，使得经过RLC实体2处理后的数据包在PDCP实体1中使用新的安全配置2进行处理。
应理解，在这种可能的实现中，UE复用了旧的PDCP实体1并建立了新的RLC实体2，对应的，第二配置信息可能的指示方式有两种：
(1)在第一种指示方式中，第二配置信息包括PDCP层配置1、RLC层配置1、RLC层配置2、安全配置1和安全配置2，其中，PDCP层配置用于重配置PDCP实体1或者将原有PDCP实体释放并新建PDCP实体1，RLC层配置1用于配置新的RLC实体1，RLC层配置2用于配置新的RLC实体2，安全配置1对应于RLC实体1，安全配置2对应于RLC实体2，UE接收第二配置信息之后，根据第二配置信息可以完成第二传输路径的配置，并且保留第一配置或者说保留第一传输路径。其中，第二配置信息可以在RLC层配置1和RLC层配置2中包括相同的无线承载标识，并将该标识与PDCP层配置进行关联，最终使RLC实体1和RLC实体2与PDCP实体1相关联。另外也可以在RLC层配置1中包括第一RLC实体的标识，RLC层配置2中包括第二RLC实体的标识，PDCP层配置1中包括第一RLC实体的标识和第二RLC实体的标识，进而UE可以配置PDCP 层1对应于RLC实体1和RLC实体2；除此之外，第二配置信息还可以包括指示信息来指示RLC层与安全配置之间的对应关系，或者，第二配置信息可以在安全配置中包括对应RLC实体的标识，例如安全配置2中包括RLC层配置2的标识或者安全配置2和RLC层配置2中都包括相同的标识，那么UE可以确定RLC层2对应于安全配置2，可以用于传输对应于第二传输路径的数据包。
(2)在第二种指示方式中，第二配置信息包括RLC层配置2、安全配置1和第四指示信息，关于RLC层配置2和安全配置1的含义可以参考第一种指示方式中的相关说明，所述指示信息用于指示保留第一配置并根据第二配置信息来配置第二传输路径，或者，所述第四指示信息用于指示第二传输路径的类型，UE接收指示信息之后，可以保留第一配置，并根据第二配置来配置第二传输路径，第二配置信息在这种指示方式中可以理解为仅传输增量配置信息，进而可以减少信令传输的消耗。
在第二种可能的实现中，如图4C所示，UE根据第二配置信息配置新的PDCP实体2和RLC实体2，形成第二传输路径，第二传输路径对应于PDCP实体2、RLC实体2和MAC实体、PHY实体形成的传输路径，其中，UE还根据第二配置信息中的安全配置来配置PDCP实体2的安全配置。
在第三种可能的实现中，如图4D所示，UE根据第二配置信息重配置PDCP实体1和RLC实体1，并新建第二逻辑信道(logical channel)，形成第二传输路径，第二传输路径对应于重配置后的PDCP实体1、重配置后的RLC实体1，第二逻辑信道和MAC实体、PHY实体形成的传输路径，其中，UE还根据第二配置信息中的安全配置为PDCP实体1和RLC实体2配置新的安全配置。可以理解为，第二配置复用原有的PDCP实体1和RLC实体1并进行重配置。在这种可能的实现中，同一个RLC实体重配置以后，关联两个逻辑信道，分别对应第一传输路径和第二传输路径，经过第一安全处理的数据通过第一传输路径传输，经过第二安全处理的数据通过第二传输路径传输。
通过上述三种可能的实现，UE可以根据第二配置信息来配置第二传输路径，需要说明的是，对于RLC实体1和RLC实体2可以应用相同的鲁棒性头压缩(robust header compression,ROHC)配置信息，第一传输路径和第二传输路径可以共用同一个MAC实体和同一个PHY实体。
基站侧的协议栈与UE侧的协议栈是相对应的，因此本申请中UE根据第二配置信息进行第二配置的方法也可以应用于辅基站，基站根据所述第二配置信息对所述第一无线承载进行第二配置，保留所述第一配置，以便在建立第二传输路径之后再释放第一传输路径，提高通信质量，在此不再赘述。另外本实施例的方法，既适用于上行也适用于下行，具体不做限定。
在步骤S305之后，所述方法还可以包括步骤S3051，UE向辅基站发送第二指示信息，第二指示信息用于指示第二传输路径已经根据第二配置建立完成，相应的，辅基站接收来自UE的第二指示信息，其中，所述第二指示信息可以是经由目标基站转发的，UE先将第二指示信息发送给目标基站，由目标基站发送给辅基站。在一种可能的实现中，UE可以显式的向辅基站指示建立完成信息，例如，通过新增消息、IE或字段的方式来指示第二配置建立完成；在另一种可能的实现中，UE可以隐式的向辅基站指示建立完成信息，例如，UE 可以通过第二配置向辅基站传输上行数据，辅基站接收来自UE通过第二配置传输的数据之后，可以确定后续可以通过第二传输路径与UE通信，通过隐式指示的方法，可以节省信令消耗并提高传输效率。
在步骤S305之后，所述方法还可以包括步骤S3052，辅基站向UE发送第三指示信息，相应的，UE接收来自辅基站的第三指示信息，所述第三指示信息用于指示释放第一配置，也可以理解为，所述第三指示信息用于指示释放第一配置。在一种可能的实现中，辅基站显式的向UE发送第三指示信息，例如，通过新增消息、IE或字段的方式来指示释放第一配置信息或者释放第一配置；在另一种可能的实现中，辅基站隐式的向UE发送第三指示信息，例如，辅基站通过第二传输路径向UE传输下行数据，UE接收来自辅基站通过第二传输路径传输的数据之后，可以确定后续通过第二传输路径与辅基站通信，进而释放第一配置，通过隐式指示的方法，可以节省信令消耗并提高传输效率。
对于步骤S306，UE使用所述第二配置与所述辅基站进行通信。
其中，使用所述第二配置与辅基站通信，可以理解为使用经过第二配置的第一无线承载与辅基站通信，也就是说使用第一无线承载的第二传输路径与辅基站通信。在新的传输路径建立之前，UE与辅基站通过旧的传输路径(第一配置)进行通信，在新的传输路径建立之后，UE与辅基站通过新的传输路径(第二配置)进行通信，因此在切换过程中，UE与辅基站之间的通信不中断，可以提升UE的通信体验。
对于步骤S307，辅基站释放第一配置信息，UE释放第一配置信息。
应理解，步骤S307为可选步骤，UE在通过第二配置与辅基站进行通信之后，再释放第一配置信息(或理解为释放第一配置)，以保证在应用新的传输路径之前，UE与辅基站可以应用旧的传输路径进行通信，以保证切换过程中的通信质量。
对于步骤S308，UE向目标基站发送切换完成消息，相应的，目标基站接收来自UE的切换完成消息.
本申请实施例不限定步骤S307和步骤S308的执行顺序，在UE与辅基站通过第二配置进行通信之后，可以实现切换过程中UE与辅基站的通信不中断，UE和辅基站也可以在切换完成之后再释放第一配置信息和/或第一配置。
需要说明的是，本申请实施例中的第二配置和第二传输路径用于表述UE在切换之后与辅基站进行通信的传输路径，其中可以包括至少一个承载，例如，上行信息和下行信息可以通过不同的无线承载来传输，至少一个第二配置可以通过一个第二配置信息来配置，也可以通过不同的第二配置信息来配置，第二配置信息用于表述UE在切换之后与辅基站进行通信的传输路径配置信息。
在本申请实施例中，处于双连接的UE在切换过程中可以根据第二配置信息建立第二传输路径，与辅基站建立第二传输路径之后再释放第一配置，以实现切换过程中不中断通信传输，提高UE的通信质量。
另外对于切换以后，目标基站使用不同于源辅基站的基站作为辅基站的场景来说，在切换过程中，UE同时使用第一传输路径与源辅基站通信，并配置第二传输路径和目标辅基站进行通信，第一传输路径和第二传输路径分别对应不同的无线承载，等切换完成以后，UE再断开与源辅基站的通信，从而保证在切换过程中，与辅基站的通信不发生中断。具体的配置方式和配置流程，与辅基站不变的场景类似，目标基站收到源基站的指示或者源辅 基站的配置以后，添加目标辅基站。UE根据基站的指示保持与源辅基站的通信连接，并接入目标辅基站，在开始与目标辅基站通信以后，断开与源辅基站的连接，具体不再赘述。
下面结合附图介绍本申请实施例中用来实现上述方法的装置。因此，上文中的内容均可以用于后续实施例中，重复的内容不再赘述。
图5给出了本申请实施例提供的一种通信装置的结构示意图。所述通信装置500可以是图2A或图2B中的终端设备，用于实现上述方法实施例中对应于终端设备的方法。所述通信装置也可以是图2A或图2B中的网络设备1-3，用于实现上述方法实施例中对应于源基站、目标基站或辅基站的方法。具体的功能可以参见上述方法实施例中的说明。
通信装置500包括一个或多个处理器501。处理器501也可以称为处理单元，可以实现一定的控制功能。所述处理器501可以是通用处理器或者专用处理器等。例如，包括：基带处理器，中央处理器，应用处理器，调制解调处理器，图形处理器，图像信号处理器，数字信号处理器，视频编解码处理器，控制器，存储器，和/或神经网络处理器等。所述基带处理器可以用于对通信协议以及通信数据进行处理。所述中央处理器可以用于对通信装置500进行控制，执行软件程序和/或处理数据。不同的处理器可以是独立的器件，也可以是集成在一个或多个处理器中，例如，集成在一个或多个专用集成电路上。
可选的，通信装置500中包括一个或多个存储器502，用以存储指令504，所述指令可在所述处理器上被运行，使得终端设备500执行上述方法实施例中描述的方法。可选的，所述存储器502中还可以存储有数据。所述处理器和存储器可以单独设置，也可以集成在一起。
可选的，通信装置501可以包括指令503(有时也可以称为代码或程序)，所述指令503可以在所述处理器上被运行，使得所述通信装置500执行上述实施例中描述的方法。处理器501中可以存储数据。
可选的，通信装置500还可以包括收发器505以及天线506。所述收发器505可以称为收发单元、收发机、收发电路、收发器，输入输出接口等，用于通过天线506实现通信装置500的收发功能。
可选的，通信装置500还可以包括以下一个或多个部件：无线通信模块，音频模块，外部存储器接口，内部存储器，通用串行总线(universal serial bus，USB)接口，电源管理模块，天线，扬声器，麦克风，输入输出模块，传感器模块，马达，摄像头，或显示屏等等。可以理解，在一些实施例中，通信装置500可以包括更多或更少部件，或者某些部件集成，或者某些部件拆分。这些部件可以是硬件，软件，或者软件和硬件的组合实现。
本申请中描述的处理器501和收发器505可实现在集成电路(integrated circuit，IC)、模拟IC、射频集成电路(radio frequency identification，RFID)、混合信号IC、专用集成电路(application specific integrated circuit，ASIC)、印刷电路板(printed circuit board，PCB)、或电子设备等上。实现本文描述的通信装置，可以是独立设备(例如，独立的集成电路，手机等)，或者可以是较大设备中的一部分(例如,可嵌入在其他设备内的模块)，具体可以参照前述关于终端设备，以及网络设备的说明，在此不再赘述。
本申请实施例提供了一种通信装置，该通信装置可用于前述各个实施例中。所述通信装置包括用以实现图3或图3B、图4A-4D中所示的实施例中所述的UE功能的相应的手段 (means)、单元和/或电路。例如，通信装置，包括收发模块，用以支持通信装置实现收发功能，和，处理模块，用以支持通信装置对信号进行处理。
图6给出了本申请实施例提供的一种通信装置的结构示意图，其中通信装置例如为终端设备。
该终端设备600可适用于图2A，图2B所示的系统中。为了便于说明，图6仅示出了终端设备600的主要部件。如图6所示，终端设备600包括处理器，可选的，还包括存储器、控制电路、天线以及输入输出装置。处理器主要用于对通信协议以及通信数据进行处理，以及对整个终端设备600进行控制，执行软件程序，处理软件程序的数据。存储器主要用于存储软件程序和数据。控制电路主要用于基带信号与射频信号的转换以及对射频信号的处理。天线主要用于收发电磁波形式的射频信号。输入输出装置，例如触摸屏，显示屏，麦克风，键盘等主要用于接收用户输入的数据以及对用户输出数据。
以终端设备600为手机为例，当终端设备600开机后，处理器可以读取存储单元中的软件程序，解释并执行软件程序的指令，处理软件程序的数据。当需要通过无线发送数据时，处理器对待发送的数据进行基带处理后，输出基带信号至控制电路，控制电路将基带信号进行射频处理后将射频信号通过天线以电磁波的形式向外发送。当有数据发送到终端设备600时，控制电路通过天线接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器，处理器将基带信号转换为数据并对该数据进行处理。
本领域技术人员可以理解，为了便于说明，图6仅示出了一个存储器和处理器。在一些实施例中，终端设备600可以包括多个处理器和存储器。存储器也可以称为存储介质或者存储设备等，本发明实施例对此不做限制。
作为一种可选的实现方式，处理器可以包括基带处理器和中央处理器，基带处理器主要用于对通信协议以及通信数据进行处理，中央处理器主要用于对整个终端设备600进行控制，执行软件程序，处理软件程序的数据。图6中的处理器集成了基带处理器和中央处理器的功能，本领域技术人员可以理解，基带处理器和中央处理器也可以是各自独立的处理器，通过总线等技术互联。终端设备600可以包括多个基带处理器以适应不同的网络制式，终端设备600可以包括多个中央处理器以增强其处理能力，终端设备600的各个部件可以通过各种总线连接。所述基带处理器也可以表述为基带处理电路或者基带处理芯片。所述中央处理器也可以表述为中央处理电路或者中央处理芯片。对通信协议以及通信数据进行处理的功能可以内置在处理器中，也可以以软件程序的形式存储在存储单元中，由处理器执行软件程序以实现基带处理功能。
在一个例子中，可以将具有收发功能的天线和控制电路视为终端设备600的收发单元610，将具有处理功能的处理器视为终端设备600的处理单元620。如图6所示，终端设备600包括收发单元610和处理单元620。收发单元也可以称为收发模块、收发器、收发机、收发装置等，处理单元也可以成为处理模块。可选的，可以将收发单元610中用于实现接收功能的器件视为接收单元，将收发单元610中用于实现发送功能的器件视为发送单元，即收发单元610包括接收单元和发送单元。示例性的，接收单元也可以称为接收机、接收器、接收电路等，发送单元可以称为发射机、发射器或者发射电路等。
其中，当图5作为终端设备时，其中的收发器505和图6中的收发单元610可以用于实现上述方法实施例中与接收和发送相关的步骤，例如：
收发器505和收发单元610用于使用第一配置通过第一无线承载与所述辅基站进行通信，用于接收来自网络侧的第二配置信息，以及用于使用所述第二配置通过所述第一无线承载与所述辅基站进行通信。
在一种可能的实现中，收发器505和收发单元610还用于向所述辅基站发送第二指示信息，所述第二指示信息用于指示所述第二配置已经完成。
在一种可能的实现中，收发器505和收发单元610还用于接收来自所述辅基站或者来自所述目标基站的第三指示信息，所述第三指示信息用于指示释放所述第一配置。
图5中的处理器501和图6中的处理单元620可以用于实现上述方法实施例中与处理相关的步骤，例如根据所述第二配置信息对所述第一无线承载进行第二配置，保留所述第一配置。
本申请实施例还提供了一种通信装置，该通信装置可用于前述各个实施例中。所述通信装置包括用以实现图3或图3B、图4A-4D所示的实施例中所述源基站、目标基站或辅基站的功能的手段(means)、单元和/或电路。例如，通信装置包括收发模块，用以支持该通信装置实现收发功能，和，处理模块，用以支持通信装置对信号进行处理。
图7给出了本申请实施例提供的一种通信装置的结构示意图，其中通信装置例如为网络设备。如图10所示，网络设备700可适用于图2A或图2B所示的系统中。网络设备700可以相对于某个或某些UE而言，作为辅基站、具备辅基站的功能，也可以相对于某个或某些UE而言，作为源基站或目标基站、具备源基站或目标基站的功能。该网络设备包括：基带装置701，射频装置702、天线703。在上行方向上，射频装置702通过天线703接收终端设备发送的信息，将终端设备发送的信息发送给基带装置701进行处理。在下行方向上，基带装置701对终端设备的信息进行处理，并发送给射频装置702，射频装置702对终端设备的信息进行处理后经过天线701发送给终端设备。
基带装置701包括一个或多个处理单元(单元又称模块)7011，存储单元7012和收发单元7013。其中处理单元7011用于支持网络设备执行上述方法实施例中网络设备的功能。存储单元7012用于存储软件程序和/或数据。收发单元7013或称接口，用于与射频装置702交互信息，该接口包括接口电路，用于信息的输入和输出。在一种实现中，所述处理单元为集成电路，例如一个或多个ASIC，或，一个或多个DSP，或，一个或者多个FPGA，或者这些类集成电路的组合。这些集成电路可以集成在一起，构成芯片。存储单元7012与处理单元7011可以位于同一个芯片中，即片内存储元件。或者存储单元7012与处理单元7011也可以为与处理元件7011处于不同芯片上，即片外存储元件。所述存储单元7012可以是一个存储器，也可以是多个存储器或存储元件的统称。
网络设备可以通过一个或多个处理单元调度程序的形式实现上述方法实施例中的部分或全部步骤。例如实现图3A或图3B中网络设备的相应的功能。所述一个或多个处理单元可以支持同一种制式的无线接入技术，也可以支持不同种制式的无线接入制式。
其中，当图5中的500作为网络设备时，其收发器505以及图7中的收发单元7013可以用于实现上述方法实施例中与接收和发送相关的步骤，例如：接收辅基站指示信息，所述辅基站指示信息用于指示所述辅基站为目标基站的辅基站；以及向所述终端设备发送第二配置信息。
在一种可能的实现，所述收发器505和收发单元7013还用于使用第一配置通过所述第 一无线承载与所述终端设备进行通信。
在一种可能的实现，所述收发器505和收发单元7013还用于接收来自所述目标基站的第一指示信息，所述第一指示信息用于指示保留所述第一配置。
在一种可能的实现，所述收发器505和收发单元7013还用于接收来自所述目标基站的安全配置。
在一种可能的实现，所述收发器505和收发单元7013还用于接收来自所述终端设备的第二指示信息，所述第二指示信息用于指示所述第二配置已经完成。
在一种可能的实现，所述收发器505和收发单元7013还用于向所述终端设备发送第三指示信息，所述第三指示信息用于指示释放所述第一配置。
图5中的500作为网络设备时，其处理器501以及图7中的处理单元7011可以用于实现上述方法实施例中与处理相关的步骤，例如根据所述第二配置信息对所述第一无线承载进行第二配置。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的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。以此为例但不限于：计算机可读介质可以包括随机存取存储器(random access memory，RAM)、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)、电可擦可编程只读存储器(electrically erasable programmable read only memory，EEPROM)、紧凑型光盘只读存储器(compact disc read-only memory，CD-ROM)、通用串行总线闪存盘(universal serial bus flash disk)、移动硬盘、或其他光盘存储、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质。另外，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)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)或直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。
以上所述，仅为本申请的具体实施方式，但本申请实施例的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请实施例揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请实施例的保护范围之内。因此，本申请实施例的保护范围应所述以权利要求的保护范围为准。

Claims (37)

  1. 一种通信方法，所述方法应用于终端设备从源基站切换到目标基站，所述源基站和所述目标基站有共同的辅基站，所述终端设备使用第一配置通过第一无线承载与所述辅基站进行通信，其特征在于，所述方法还包括：
    接收来自网络侧的第二配置信息，根据所述第二配置信息对所述第一无线承载进行第二配置，保留所述第一配置；
    使用所述第二配置通过所述第一无线承载与所述辅基站进行通信。
  2. 根据权利要求1所述的通信方法，其特征在于，在使用所述第二配置通过所述第一无线承载与所述辅基站进行通信之后，所述方法还包括：
    释放所述第一配置。
  3. 根据权利要求1或2所述的通信方法，其特征在于，所述第二配置信息包括无线链路控制RLC层配置，分组数据汇聚层协议PDCP层配置和安全配置中的至少一个。
  4. 根据权利要求1至3任一项所述的通信方法，其特征在于，所述第二配置信息还包括第一指示信息，所述第一指示信息用于指示保留所述第一配置。
  5. 根据权利要求1至4任一项所述的通信方法，其特征在于，所述第二配置信息承载于来自所述辅基站的信令无线承载SRB3，或者，所述第二配置信息承载于来自所述源基站的切换命令。
  6. 根据权利要求1至5任一项所述的通信方法，其特征在于，所述方法还包括：
    向所述辅基站发送第二指示信息，所述第二指示信息用于指示所述第二配置已经完成。
  7. 根据权利要求1至6任一项所述的通信方法，其特征在于，所述方法还包括：
    接收来自所述辅基站或者来自所述目标基站的第三指示信息，所述第三指示信息用于指示释放所述第一配置。
  8. 根据权利要求1至7任一项所述的通信方法，其特征在于，
    所述第一配置包括第一PDCP实体与第一RLC实体，所述第一PDCP实体、所述第一RLC实体与第一安全配置相互关联；
    所述根据第二配置信息对所述第一无线承载进行第二配置包括：
    根据所述第二配置信息重配置所述第一PDCP实体、建立第二RLC实体并进行第二安全配置，所述第一PDCP实体、所述第二RLC实体与所述第二安全配置相互关联。
  9. 一种通信方法，所述方法应用于辅基站，所述辅基站通过第一无线承载与终端设备通信，所述终端设备从源基站切换到目标基站，所述源基站和所述目标基站有共同的所述辅基站，其特征在于，所述方法还包括：
    接收辅基站指示信息，所述辅基站指示信息用于指示所述辅基站为目标基站的辅基站；
    向所述终端设备发送第二配置信息，所述第二配置信息用于对所述第一无线承载进行第二配置。
  10. 根据权利要求9所述的通信方法，其特征在于，所述辅基站通过第一无线承载与终端设备通信包括：
    使用第一配置通过所述第一无线承载与所述终端设备进行通信。
  11. 根据权利要求9或10任一项所述的通信方法，其特征在于，所述方法还包括：
    接收来自所述目标基站的安全配置。
  12. 根据权利要求9至11任一项所述的通信方法，其特征在于，
    所述第二配置信息包括无线链路控制RLC层配置，分组数据汇聚层协议PDCP层配置和安全配置中的至少一个。
  13. 根据权利要求9至12任一项所述的通信方法，其特征在于，所述第二配置信息还包括所述第一指示信息，所述第一指示信息用于指示保留所述第一配置。
  14. 根据权利要求9至13任一项所述的通信方法，其特征在于，所述第二配置信息承载于来自所述辅基站的信令无线承载SRB3，或者，所述第二配置信息承载于来自所述源基站的切换命令。
  15. 根据权利要求9至14任一项所述的通信方法，其特征在于，所述方法还包括：
    接收来自所述终端设备的第二指示信息，所述第二指示信息用于指示所述第二配置已经完成。
  16. 根据权利要求9至15任一项所述的通信方法，其特征在于，所述方法还包括：
    向所述终端设备发送第三指示信息，所述第三指示信息用于指示释放所述第一配置。
  17. 一种通信装置，所述装置从源基站切换到目标基站，所述源基站和所述目标基站有共同的辅基站，所述装置包括收发模块和处理模块，所述收发模块用于使用第一配置通过第一无线承载与所述辅基站进行通信，其特征在于，
    所述收发模块还用于接收来自网络侧的第二配置信息；
    所述处理模块用于根据所述第二配置信息对所述第一无线承载进行第二配置，保留所述第一配置；
    所述收发模块还用于使用所述第二配置通过所述第一无线承载与所述辅基站进行通信。
  18. 根据权利要求17所述的通信装置，其特征在于，在使用所述第二配置通过所述第一无线承载与所述辅基站进行通信之后，所述处理模块还用于释放所述第一配置。
  19. 根据权利要求17或18所述的通信装置，其特征在于，所述第二配置信息包括无线链路控制RLC层配置，分组数据汇聚层协议PDCP层配置和安全配置中的至少一个。
  20. 根据权利要求17至19任一项所述的通信装置，其特征在于，所述第二配置信息还包括第一指示信息，所述第一指示信息用于指示保留所述第一配置。
  21. 根据权利要求17至20任一项所述的通信装置，其特征在于，所述第二配置信息承载于来自所述辅基站的信令无线承载SRB3，或者，所述第二配置信息承载于来自所述源基站的切换命令。
  22. 根据权利要求17至21任一项所述的通信装置，其特征在于，
    所述收发模块还用于向所述辅基站发送第二指示信息，所述第二指示信息用于指示所述第二配置已经完成。
  23. 根据权利要求17至22任一项所述的通信装置，其特征在于，
    所述收发模块还用于接收来自所述辅基站或者来自所述目标基站的第三指示信息，所述第三指示信息用于指示释放所述第一配置。
  24. 根据权利要求17至23任一项所述的通信装置，其特征在于，
    所述第一配置包括第一PDCP实体与第一RLC实体，所述第一PDCP实体、所述第一RLC实体与第一安全配置相互关联；
    所述根据第二配置信息对所述第一无线承载进行第二配置包括：
    根据所述第二配置信息重配置所述第一PDCP实体、建立第二RLC实体并进行第二安全配置，所述第一PDCP实体、所述第二RLC实体与所述第二安全配置相互关联。
  25. 一种通信装置，所述装置包括收发模块和处理模块，所述收发模块用于通过第一无线承载与终端设备通信，所述终端设备从源基站切换到目标基站，所述源基站和所述目标基站有共同的所述辅基站，其特征在于，
    所述收发模块还用于接收辅基站指示信息，所述辅基站指示信息用于指示所述辅基站为目标基站的辅基站；
    所述收发模块还用于向所述终端设备发送第二配置信息；
    所述处理模块用于根据所述第二配置信息对所述第一无线承载进行第二配置。
  26. 根据权利要求25所述的通信装置，其特征在于，所述收发模块用于通过第一无线承载与终端设备通信包括：
    使用第一配置通过所述第一无线承载与所述终端设备进行通信。
  27. 根据权利要求25或26任一项所述的通信装置，其特征在于，所述收发模块还用于接收来自所述目标基站的安全配置。
  28. 根据权利要求25至27任一项所述的通信装置，其特征在于，
    所述第二配置信息包括无线链路控制RLC层配置，分组数据汇聚层协议PDCP层配置和安全配置中的至少一个。
  29. 根据权利要求25至28任一项所述的通信装置，其特征在于，所述第二配置信息还包括所述第一指示信息，所述第一指示信息用于指示保留所述第一配置。
  30. 根据权利要求25至29任一项所述的通信装置，其特征在于，所述第二配置信息承载于来自所述辅基站的信令无线承载SRB3，或者，所述第二配置信息承载于来自所述源基站的切换命令。
  31. 根据权利要求25至30任一项所述的通信装置，其特征在于，所述收发模块还用于接收来自所述终端设备的第二指示信息，所述第二指示信息用于指示所述第二配置已经完成。
  32. 根据权利要求25至31任一项所述的通信装置，其特征在于，所述收发模块还用于向所述终端设备发送第三指示信息，所述第三指示信息用于指示释放所述第一配置。
  33. 一种通信装置，其特征在于，包括处理器和存储器；所述存储器用于存储一个或多个计算机程序，当所述一个或多个计算机程序被运行时，使得如权利要求1至8中任一项所述的方法被执行。
  34. 一种通信装置，其特征在于，包括处理器和存储器；所述存储器用于存储一个或多个计算机程序，当所述一个或多个计算机程序被运行时，使得如权利要求9至16中任一项所述的方法被执行。
  35. 一种通信系统，包括终端设备和辅基站，所述源基站和所述目标基站有共同的所述辅基站，所述终端设备从所述源基站切换到所述目标基站，其特征在于，
    所述终端设备用于实现如权利要求1至8中任一项所述的通信方法；
    所述辅基站用于实现如权利要求9至16中任一项所述的通信方法。
  36. 一种计算机可读存储介质，包括指令，当其在计算机上运行时，使得计算机执行如权利要求1至8中任一项所述的方法。
  37. 一种计算机可读存储介质，包括指令，当其在计算机上运行时，使得计算机执行 如权利要求9至16中任一项所述的方法。
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130259003A1 (en) * 2010-12-16 2013-10-03 Pantech Co., Ltd. Apparatus and method for performing wireless connection re-establishment in a multiple component carrier system
CN106063328A (zh) * 2015-01-26 2016-10-26 华为技术有限公司 一种切换装置及方法
CN107371278A (zh) * 2016-05-13 2017-11-21 中兴通讯股份有限公司 Rrc状态的处理方法及装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130259003A1 (en) * 2010-12-16 2013-10-03 Pantech Co., Ltd. Apparatus and method for performing wireless connection re-establishment in a multiple component carrier system
CN106063328A (zh) * 2015-01-26 2016-10-26 华为技术有限公司 一种切换装置及方法
CN111447651A (zh) * 2015-01-26 2020-07-24 华为技术有限公司 一种切换装置及方法
CN111465064A (zh) * 2015-01-26 2020-07-28 华为技术有限公司 一种切换装置及方法
CN107371278A (zh) * 2016-05-13 2017-11-21 中兴通讯股份有限公司 Rrc状态的处理方法及装置

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