CN118354373A

CN118354373A - Communication method and device, terminal equipment, main node and auxiliary node

Info

Publication number: CN118354373A
Application number: CN202310018803.9A
Authority: CN
Inventors: 邓云
Original assignee: Spreadtrum Communications Shanghai Co Ltd
Current assignee: Spreadtrum Communications Shanghai Co Ltd
Priority date: 2023-01-06
Filing date: 2023-01-06
Publication date: 2024-07-16
Also published as: WO2024146459A1

Abstract

The application discloses a communication method and device, terminal equipment, a main node and an auxiliary node, and relates to the technical field of communication; the method comprises the following steps: the terminal equipment sends first information, wherein the first information is used for updating the history information of the terminal equipment stored in a first primary and secondary cell in continuous primary and secondary cell condition updating, and the first primary and secondary cell is a primary and secondary cell which is accessed or has been accessed by the terminal equipment; correspondingly, the secondary node receives the first information. The embodiment of the application introduces the first information and updates the history information of the terminal equipment stored in the first primary and secondary cells in continuous PScell condition updating through the first information. In this way, when the terminal equipment is accessing or has accessed a new primary and secondary cell, the updating of the history information stored in the new primary and secondary cell is realized through the first information, so that the stability, reliability and accuracy of the dual-connectivity communication under continuous PScell condition updating are guaranteed.

Description

Communication method and device, terminal equipment, main node and auxiliary node

Technical Field

The present application relates to the field of communications technologies, and in particular, to a communications method and apparatus, a terminal device, a master node, and an auxiliary node.

Background

The third generation partnership project organization (3rd Generation Partnership Project,3GPP) has introduced a conditional handover (Conditional Handover, CHO) mechanism in its discussion, which can effectively improve the success rate of cell handover.

The conditional switching mechanism may be applied to dual connections (Dual Connectivity, DC). At this time, the change of the secondary cell group (Secondary Cell Group, SCG) is not a handover in a strict sense, but is called a condition update (Conditional Change). Since SCG always contains one primary Secondary Cell (Primary Secondary Cell, PSCell) and at least one or no Secondary cells (SCell), the SCG-side condition update is also called PSCell condition update, or Conditional PSCell update (Conditional PSCELL CHANGE, CPC).

Release18 (R18) of 3GPP is discussing enhancing PSCell condition updates compared to single PSCell condition updates, thereby introducing continuous PSCell condition updates. The continuous PSCell condition update may be understood as that the network sends access configuration information of at least one candidate PSCell to the terminal device, and after the terminal device performs the first PSCell condition update, the access configuration information of the remaining candidate pscells is continuously reserved, so that the terminal device continues to perform at least one PSCell condition update.

In a single PSCell condition updating process, the network side generally stores or maintains relevant information of the terminal device. However, how to update the information stored or maintained at the network side in the continuous PSCell condition update to ensure the stability, reliability and accuracy of the dual connectivity communication under the continuous PSCell condition update requires further research.

Disclosure of Invention

The application provides a communication method and device, terminal equipment, a main node and an auxiliary node, which aim to solve the problem of updating the information stored or maintained at a network side in continuous PSCell condition updating.

In a first aspect, the present application is a communication method applied to a terminal device, including:

And sending first information, wherein the first information is used for updating the historical information of the terminal equipment stored in a first primary and secondary cell in continuous primary and secondary cell condition updating or updating the historical information of the terminal equipment maintained by a primary node in continuous primary and secondary cell condition updating, and the first primary and secondary cell is a primary and secondary cell which is accessed or has been accessed by the terminal equipment.

It can be seen that, in the embodiment of the present application, the first information is introduced, and the history information of the terminal device stored in the first primary and secondary cells is updated in the continuous PSCell condition update through the first information, or the history information of the terminal device maintained by the primary node is updated in the continuous primary and secondary cell condition update, where the first primary and secondary cells are primary and secondary cells that are or have been accessed by the terminal device.

In this way, when the terminal equipment is accessing or has accessed a new primary and secondary cell, the first information is used to update the history information of the terminal equipment stored in the new primary and secondary cell, or update the history information of the terminal equipment maintained by the primary node, so that the stability, reliability and accuracy of dual-connectivity communication under continuous PScell condition update are guaranteed. This is because the network side can reasonably configure measurement parameters, determine a handover target, and the like based on the history information of the terminal device, so that accurate history information is very important for ensuring the stability and reliability of the dual-connection communication.

In a second aspect, the present application is a communication method applied to a master node, including:

And sending first information, wherein the first information is used for updating the history information of the terminal equipment stored in a first primary and secondary cell in continuous primary and secondary cell condition updating, and the first primary and secondary cell is a primary and secondary cell which is accessed or has been accessed by the terminal equipment.

In a third aspect, the present application is a communication method applied to a master node, including:

And receiving first information, wherein the first information is used for updating the history information of the terminal equipment maintained by the main node in continuous primary and secondary cell condition updating, and the first primary and secondary cell is a primary and secondary cell which is accessed or has been accessed by the terminal equipment.

In a fourth aspect, the present application is a communication method applied to an auxiliary node, where the auxiliary node jurisdictions a first primary and auxiliary cell, including:

And receiving first information, wherein the first information is used for updating the history information of the terminal equipment stored in the first primary and secondary cells in continuous primary and secondary cell condition updating, and the first primary and secondary cells are primary and secondary cells which are accessed or already accessed by the terminal equipment.

In a fifth aspect, the present application is a communication method applied to an auxiliary node, where the auxiliary node policing a first primary and secondary cell includes:

and sending first information, wherein the first information is used for updating the history information of the terminal equipment maintained by the main node in continuous primary and secondary cell condition updating, and the first primary and secondary cell is a primary and secondary cell which is accessed or has been accessed by the terminal equipment.

A sixth aspect is a communication apparatus of the present application, applied to a terminal device, including:

And the sending unit is used for sending first information, wherein the first information is used for updating the historical information of the terminal equipment stored in a first primary and secondary cell in continuous primary and secondary cell condition updating or updating the historical information of the terminal equipment maintained by a primary node in continuous primary and secondary cell condition updating, and the first primary and secondary cell is a primary and secondary cell which is accessed or has been accessed by the terminal equipment.

A seventh aspect is a communication device of the present application, applied to a master node, including:

and the sending unit is used for sending first information, wherein the first information is used for updating the history information of the terminal equipment stored in a first primary and secondary cell in continuous primary and secondary cell condition updating, and the first primary and secondary cell is a primary and secondary cell which is accessed or has been accessed by the terminal equipment.

An eighth aspect is a communication device of the present application, applied to a master node, including:

And the receiving unit is used for receiving first information, wherein the first information is used for updating the history information of the terminal equipment maintained by the main node in continuous primary and secondary cell condition updating, and the first primary and secondary cell is a primary and secondary cell which is accessed or has been accessed by the terminal equipment.

A ninth aspect is a communication device of the present application, applied to an auxiliary node, where the auxiliary node corresponds to a first primary and secondary cell, and includes:

And the receiving unit is used for receiving first information, wherein the first information is used for updating the history information of the terminal equipment stored in the first primary and secondary cells in continuous primary and secondary cell condition updating, and the first primary and secondary cells are primary and secondary cells which are accessed or already accessed by the terminal equipment.

A tenth aspect of the present application is a communication device applied to an auxiliary node, where the auxiliary node corresponds to a first primary and secondary cell, and the communication device includes:

and the sending unit is used for sending first information, wherein the first information is used for updating the history information of the terminal equipment maintained by the main node in continuous primary and secondary cell condition updating, and the first primary and secondary cell is a primary and secondary cell which is accessed or has been accessed by the terminal equipment.

An eleventh aspect is a terminal device of the present application, comprising a processor, a memory and a computer program or instructions stored on the memory, wherein the processor executes the computer program or instructions to implement the steps in the method designed in the first aspect.

A twelfth aspect is a master node of the present application, comprising a processor, a memory and a computer program or instructions stored on the memory, wherein the processor executes the computer program or instructions to implement the steps in the method devised in the second or third aspect.

A thirteenth aspect is a secondary node of the present application, including a processor, a memory, and a computer program or instructions stored on the memory, where the processor executes the computer program or instructions to implement the steps in the method designed in the fourth or fifth aspect.

A fourteenth aspect is a chip according to the present application, comprising a processor and a communication interface, wherein the processor performs the steps of the method according to the first or second aspect.

A fifteenth aspect is a chip module according to the present application, including a transceiver component and a chip, where the chip includes a processor, and the processor executes the steps in the methods designed in the first aspect to the fifth aspect.

A sixteenth aspect is a computer readable storage medium of the present application, in which a computer program or instructions are stored which, when executed, implement the steps in the method devised in the first to fifth aspects above. For example, the computer program or instructions are executed by a processor.

A seventeenth aspect is a computer program product according to the present application, comprising a computer program or instructions which, when executed, implement the steps of the method devised in the first to fifth aspects above. For example, the computer program or instructions are executed by a processor.

The technical effects of the second to seventeenth aspects may be seen by the technical effects of the first aspect, and are not repeated here.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the description of the embodiments or the prior art will be briefly described below.

FIG. 1 is a schematic diagram of a communication system architecture according to an embodiment of the present application;

FIG. 2 is a schematic flow chart of a continuous PScell condition update according to an embodiment of the present application;

FIG. 3 is a flow chart of a communication method according to an embodiment of the present application;

FIG. 4 is a flow chart of yet another communication method according to an embodiment of the present application;

FIG. 5 is a flow chart of yet another communication method according to an embodiment of the present application;

FIG. 6 is a flow chart of yet another communication method according to an embodiment of the present application;

fig. 7 is a functional unit block diagram of a communication device according to an embodiment of the present application;

fig. 8 is a functional unit block diagram of still another communication apparatus according to an embodiment of the present application;

fig. 9 is a functional unit block diagram of still another communication apparatus according to an embodiment of the present application;

Fig. 10 is a functional unit block diagram of still another communication apparatus according to an embodiment of the present application;

Fig. 11 is a functional unit block diagram of still another communication apparatus according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

FIG. 13 is a schematic diagram of a master node according to an embodiment of the present application;

FIG. 14 is a schematic diagram of a master node according to an embodiment of the present application;

FIG. 15 is a schematic diagram of a secondary node according to an embodiment of the present application;

Fig. 16 is a schematic structural diagram of yet another auxiliary node according to an embodiment of the present application.

Detailed Description

It should be understood that the terms "first," "second," and the like, as used in embodiments of the present application, are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, software, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the embodiment of the application, "and/or" describes the association relation of the association objects, which means that three relations can exist. For example, a and/or B may represent three cases: a alone; both A and B are present; b alone. Wherein A, B may be singular or plural.

In the embodiment of the present application, the symbol "/" may indicate that the associated object is an or relationship. In addition, the symbol "/" may also denote a divisor, i.e. performing a division operation. For example, A/B may represent A divided by B.

"At least one" or the like in the embodiments of the present application means any combination of these items, including any combination of single item(s) or plural items(s), meaning one or more, and plural means two or more. For example, at least one (one) of a, b or c may represent the following seven cases: a, b, c, a and b, a and c, b and c, a, b and c. Wherein each of a, b, c may be an element or a set comprising one or more elements.

The 'equal' in the embodiment of the application can be used with the greater than the adopted technical scheme, can also be used with the lesser than the adopted technical scheme. When the combination is equal to or greater than the combination, the combination is not less than the combination; when the value is equal to or smaller than that used together, the value is not larger than that used together.

"Of", "corresponding (corresponding/relevant)", "corresponding (corresponding)", and "indicated (indicated)" referred to in the embodiments of the present application may be sometimes used in combination. It should be noted that the meaning of what is meant is consistent when de-emphasizing the differences.

The "connection" in the embodiments of the present application refers to various connection modes such as direct connection or indirect connection, so as to implement communication between devices, which is not limited in any way.

The "network" in the embodiment of the present application may be expressed as the same concept as the "system", i.e. the communication system is a communication network.

The following describes related content, concepts, meanings, technical problems, technical schemes, beneficial effects and the like related to the embodiment of the application.

1. Communication system, terminal device, network device, master Node (MN, also called Master base station) and slave Node (SN, also called slave base station)

1. Communication system

The technical scheme of the embodiment of the application can be applied to various communication systems, such as: general Packet Radio Service (GPRS), long term evolution (Long Term Evolution, LTE) system, long term evolution advanced (Advanced Long Term Evolution, LTE-a) system, new Radio (NR) system, evolved system of NR system, LTE-based Access to Unlicensed Spectrum on unlicensed spectrum (LTE-U) system, NR-based Access to Unlicensed Spectrum on unlicensed spectrum (NR-U) system, non-terrestrial communication network (Non-TERRESTRIAL NETWORKS, NTN) system, universal mobile communication system (Universal Mobile Telecommunication System, UMTS), wireless local area network (Wireless Local Area Networks, WLAN), wireless fidelity (WIRELESS FIDELITY, wi-Fi), 6th Generation (6 th-Generation, 6G) communication system, or other communication system, etc.

It should be noted that, the number of connections supported by the conventional communication system is limited and easy to implement. However, with the development of communication technology, the communication system may support not only a conventional communication system, but also, for example, a device-to-device (D2D) communication, a machine-to-machine (machine to machine, M2M) communication, a machine type communication (MACHINE TYPE communication, MTC), an inter-vehicle (vehicle to vehicle, V2V) communication, an internet of vehicles (vehicle to everything, V2X) communication, a narrowband internet of things (narrow band internet of things, NB-IoT) communication, and the like, so the technical scheme of the embodiment of the present application may be applied to the above communication system.

In addition, the technical scheme of the embodiment of the application can be applied to beamforming (beamforming), carrier aggregation (carrier aggregation, CA), dual-connection (dual connectivity, DC) or independent (standalone, SA) deployment scenarios and the like.

In the embodiment of the application, the frequency spectrum used for communication between the terminal equipment and the network equipment, or the frequency band used for communication between the terminal equipment and the terminal equipment can be an authorized frequency band or an unauthorized frequency band, which is not limited. In addition, unlicensed bands may be understood as shared bands and licensed spectrum may be understood as non-shared bands.

Since the embodiments of the present application are described in connection with terminal devices and network devices, the terminal devices and network devices involved will be specifically described below.

2. Terminal equipment

The terminal device may be a device having a transceiving function, and may also be referred to as a terminal, a User Equipment (UE), a remote terminal device (remote UE), a relay UE, an access terminal device, a subscriber unit, a subscriber station, a mobile station, a remote station, a mobile device, a user terminal device, an intelligent terminal device, a wireless communication device, a user agent, or a user equipment. The relay device is a terminal device capable of providing a relay service to other terminal devices (including a remote terminal device).

For example, the terminal device may be a mobile phone (mobile phone), a tablet (Pad), a computer with wireless transceiving function, a Virtual Reality (VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a wireless terminal device in industrial control (industrial control), a wireless terminal device in unmanned automatic driving, a wireless terminal device in remote medical (remote medical), a wireless terminal device in smart grid (SMART GRID), a wireless terminal device in transportation security (transportation safety), a wireless terminal device in smart city (SMART CITY) or a wireless terminal device in smart home (smart home), or the like.

As another example, the terminal device may also be a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital assistant (personal DIGITAL ASSISTANT, PDA), a handheld device with wireless communication functionality, a computing device or other processing device connected to a wireless modem, a car-mounted device, a wearable device, a terminal device in a next generation communication system (e.g. NR communication system, 6G communication system) or a terminal device in a future evolved public land mobile communication network (public land mobile network, PLMN), etc., without being limited in particular.

In some possible implementations, the terminal device may be deployed on land, including indoors or outdoors, hand-held, wearable, or vehicle-mounted; can be deployed on the water surface (such as ships, etc.); may be deployed in the air (e.g., aircraft, balloons, satellites, etc.).

In some possible implementations, the terminal device may include means for wireless communication functions, such as a chip system, a chip module. By way of example, the system-on-chip may include a chip, and may include other discrete devices.

3. Network equipment

The network device may be a device with a transceiver function, and is configured to communicate with the terminal device.

In some possible implementations, the network device may be responsible for air-side radio resource management (radio resource management, RRM), quality of service (quality of service, qoS) management, data compression and encryption, data transceiving, and so on.

In some possible implementations, the network device may be a Base Station (BS) in a communication system or a device deployed in a radio access network (radio access network, RAN) for providing wireless communication functions.

For example, the network device may be an evolved node B (evolutional node B, eNB or eNodeB) in the LTE communication system, a next generation evolved node B (next generation evolved node B, ng-eNB) in the NR communication system, a next generation node B (next generation node B, gNB) in the NR communication system, a Master Node (MN) in the dual connectivity architecture, a second node or Secondary Node (SN) in the dual connectivity architecture, or the like, without particular limitation.

In some possible implementations, the network device may also be an Access Point (AP) in a WLAN, a relay station, a communication device in a future evolved PLMN network, a communication device in an NTN network, etc.

In some possible implementations, the network device may include a device, such as a system-on-chip, a chip module, having means to provide wireless communication functionality for the terminal device. The chip system may include a chip, or may include other discrete devices, for example.

In some possible implementations, the network device may communicate with an internet protocol (Internet Protocol, IP) network. Such as the internet, a private IP network or other data network, etc.

In some possible implementations, the network device may be one independent node to implement the functionality of the base station or the network device may include two or more independent nodes to implement the functionality of the base station. For example, network devices include centralized units (centralized unit, CUs) and Distributed Units (DUs), such as gNB-CUs and gNB-DUs. Further, in other embodiments of the present application, the network device may further include an active antenna unit (ACTIVE ANTENNA unit, AAU). Wherein a CU implements a portion of the functions of the network device and a DU implements another portion of the functions of the network device. For example, a CU is responsible for handling non-real-time protocols and services, implementing the functions of a radio resource control (radio resource control, RRC) layer, a service data adaptation (SERVICE DATA adaptation protocol, SDAP) layer, and a packet data convergence (PACKET DATA convergence protocol, PDCP) layer. The DUs are responsible for handling physical layer protocols and real-time services, implementing the functions of the radio link control (radio link control, RLC), medium access control (medium access control, MAC) and Physical (PHY) layers. In addition, the AAU can realize partial physical layer processing function, radio frequency processing and related functions of the active antenna. Since the information of the RRC layer may eventually become or be converted from the information of the PHY layer, in this network deployment, higher layer signaling (e.g., RRC signaling) may be considered to be generated by the CU, transmitted by the DU, or transmitted by both the DU and the AAU. It is understood that the network device may include at least one of CU, DU, AAU. In addition, the CU may be divided into network devices in the RAN, or may be divided into devices in the core network, which is not particularly limited.

In some possible implementations, the network device may be any one of multiple sites that performs coherent cooperative transmission (coherent joint transmission, CJT) with the terminal device, or other sites outside the multiple sites, or other network devices that perform network communication with the terminal device, which is not particularly limited. The multi-station coherent cooperative transmission may be a joint coherent transmission of multiple stations, or different data belonging to the same physical downlink shared channel (Physical Downlink SHARED CHANNEL, PDSCH) are sent from different stations to the terminal device, or multiple stations are virtualized into one station for transmission, and names with the same meaning specified in other standards are also applicable to the present application, i.e. the present application is not limited by the names of these parameters. Stations in the multi-station coherent cooperative transmission may be remote radio heads (Remote Radio Head, RRH), transmission receiving points (transmission and reception point, TRP), network devices, and the like, which are not particularly limited.

In some possible implementations, the network device may be any one of multiple sites that perform incoherent cooperative transmission with the terminal device, or other sites outside the multiple sites, or other network devices that perform network communication with the terminal device, which is not limited specifically. The multi-station incoherent cooperative transmission may be a multi-station joint incoherent transmission, or different data belonging to the same PDSCH are sent from different stations to the terminal device, and names with the same meaning specified in other standards are also applicable to the present application, i.e. the present application is not limited to the names of these parameters. The stations in the multi-station incoherent cooperative transmission may be RRHs, TRPs, network devices, etc., which are not particularly limited.

In some possible implementations, the network device may have a mobile nature, e.g., the network device may be a mobile device. Alternatively, the network device may be a satellite, a balloon station. For example, the satellite may be a Low Earth Orbit (LEO) satellite, a medium earth orbit (medium earth orbit, MEO) satellite, a geosynchronous orbit (geostationary earth orbit, GEO) satellite, a high elliptical orbit (HIGH ELLIPTICAL orbit, HEO) satellite, or the like. Alternatively, the network device may be a base station disposed on land, in a water area, or the like.

In some possible implementations, the network device may serve a cell, and terminal devices in the cell may communicate with the network device over transmission resources (e.g., spectrum resources). The cell may be a macro cell (macro cell), a small cell (SMALL CELL), a urban cell (metro cell), a micro cell (micro cell), a pico cell (pico cell), a femto cell (femto cell), or the like.

4. Main node and auxiliary node

The terminal equipment of the embodiment of the application can establish double connection, and has different kinds of double connection, which are collectively called as multiple radio access technologies (Multi-RAT Dual Connectivity, MR-DC). For example, the type of dual connectivity includes EN-DC(E-UTRAN NR Dual Connectivity)、NE-DC(NR E-UTRAN Dual Connectivity)、NR-DC(NR NR Dual Connectivity), etc. The EN-DC may be understood that the LTE base station is used as a main node of the terminal device, and the NR base station is used as an auxiliary node of the terminal device; NE-DC, it can be understood that NR base station is used as the main node of terminal equipment, LTE base station is used as the auxiliary node of terminal equipment; NR-DC is understood to mean that an NR base station acts as a master node for a terminal device and another NR base station acts as a slave node for the terminal device.

In dual connectivity, the terminal device may remain connected to the primary node and the secondary node. The primary node and the secondary node may be collectively referred to as the "network devices" described above.

The terminal device is connected to at least a primary cell (PRIMARY CELL, PCELL) on the primary node side. That is, the master node may jurisdiction the PCell, and may also jurisdiction other Secondary cells (scells).

The terminal device is connected to at least a primary and secondary cell (PSCell) on the secondary node side. That is, the secondary node may police the PSCell, and may also police other scells.

5. Description of the examples

An exemplary description of a communication system according to an embodiment of the present application is provided below.

Exemplary, a network architecture of a communication system according to an embodiment of the present application may refer to fig. 1. As shown in fig. 1, communication system 10 may include a terminal device 110, a primary node 120, and a secondary node 130.

Fig. 1 is merely an illustration of a network architecture of a communication system, and the network architecture of the communication system according to the embodiment of the present application is not limited thereto. For example, a server or other device may also be included in communication system 10. As another example, a plurality of terminal devices may be included in communication system 10.

2. Continuous PSCell condition update

It should be noted that a conditional handover mechanism is introduced in the discussion of 3 GPP. The greatest difference between the conditional handover procedure and the original handover procedure is that the conditional handover command includes a handover condition (or a handover execution condition/a handover trigger condition), for example, the handover trigger condition may be a predetermined offset for determining whether the signal quality of the candidate target cell is higher than the signal quality of the serving cell. After the terminal equipment receives the condition switching command, judging whether the switching triggering condition is met. When the switching triggering condition is met, the terminal equipment uses the configuration parameters of the candidate target cells contained in the conditional switching command to access the target cells, and synchronizes with the target cells, and initiates a random access flow in the target cells. After sending the handover complete command (e.g., RRC reconfiguration complete message), the terminal device performs handover to the target cell. When the handover triggering condition is not satisfied, the terminal device continues to maintain the RRC connection with the source cell.

The conditional switching mechanism can be applied to dual connectivity, introducing PSCell conditional updates. The continuous PSCell condition update may be understood as that the network sends access configuration information of at least one candidate PSCell to the terminal device, and after the terminal device performs the first PSCell condition update, the access configuration information of the remaining candidate pscells is continuously reserved, so that the terminal device continues to perform at least one PSCell condition update.

In the PSCell condition updating process, the network side (e.g., the primary node and/or the secondary node) generally needs to save or maintain history information (History information) of the terminal device, where the history information may be used to represent PSCell information that has been historically accessed by the terminal device, so as to be used for later measurement parameter configuration, etc. For example, the history information is used to record the residence Time (Time stage) in the PSCell that the terminal device has historically accessed.

In the following, the embodiment of the present application takes two PSCell condition updates as an example, and a specific flow of continuous PSCell condition updates is described as an example.

As shown in fig. 2, the procedure of continuous PSCell condition updating is as follows:

Step 201: the terminal device establishes a dual connection.

In the dual connection, the terminal device maintains a connection state with the main node and the source and auxiliary nodes. The terminal equipment is at least connected with the PCell at the main node side and is at least connected with the PSCell at the source auxiliary node side.

Step 202: terminal equipment reports measurement report to main node

It should be noted that, the master node configures the relevant measurement configuration to the terminal device. The terminal device may then perform measurements according to these measurement configurations and report measurement reports to the master node when there are neighbors and/or serving cells that meet the reporting conditions. The measurement report may carry an Identity (ID) and a signal quality of a neighbor cell and/or a serving cell satisfying the reporting condition, may carry an identity and a signal quality of a neighbor cell satisfying the reporting condition, may carry an identity and a signal quality of a serving cell satisfying the reporting condition, and may carry an identity and a signal quality of a neighbor cell satisfying the reporting condition, and an identity and a signal quality of a serving cell.

Step 203: the master node decides to configure successive PSCell condition updates.

It should be noted that, the master node may decide to configure continuous PSCell condition update for the terminal device according to the capability and measurement report of the terminal device. The primary node selects a plurality of candidate pscells, and the candidate secondary node polices the candidate pscells and sends a PSCell condition update request message to the candidate secondary node.

Step 204 and step 204A: the master node sends a PSCell conditional update request message to the candidate auxiliary nodes

The master node selects two candidate pscells, and the secondary nodes to which the two candidate pscells belong are candidate secondary node 1 and candidate secondary node 2, respectively.

Then, in step 204, the primary node transmits a PSCell condition update request message to the candidate secondary node 1. The PSCell condition update request message may include radio parameters configured by the primary node side for the terminal device, such as secondary cell group configuration limit information (ConfigRestrictInfoSCG), capability information of the terminal device, radio parameters configured by the source secondary cell for the terminal device (such as sourceConfigSCG), and the like; the update trigger condition/update execution condition (change execution condition) of the PSCell, the identification information of the candidate PSCell, and the like may also be included. The update trigger condition may be an offset that the signal quality of the candidate PSCell is higher than the signal quality of the source PSCell (i.e. the PSCell governed by the source and the auxiliary node). In this way, the terminal device can determine whether the candidate PSCell satisfies the update trigger condition. When the update trigger condition is satisfied, the terminal device performs PSCell update (PSCELL CHANGE or SN change).

Correspondingly, in step 204A, the primary node sends the PSCell condition update request message to the candidate secondary node 2. Step 204 and step 204A may be performed in parallel, or may be performed sequentially. That is, when selecting a plurality of candidate pscells, the primary base station may send the PSCell condition update request message to candidate secondary nodes to which the plurality of pscells belong in parallel, or may send the PSCell condition update request message sequentially.

In addition, the PSCell condition update request message may also use other names, such as a secondary node condition update request message. Since the terminal device in dual connectivity can configure Carrier Aggregation (CA) at the secondary cell side, the PSCell condition update request message is not limited to be used for requesting updating of PSCell, but can be used for requesting updating of other scells in SCG. In this way, the candidate auxiliary node may configure the access configuration information of the candidate PSCell for the terminal device, or may configure the access configuration information of the candidate PSCell and the access configuration information of at least one SCell for the terminal device.

Steps 205 and 205A: admission control by candidate auxiliary nodes

After receiving the PSCell update request, the candidate secondary node 1 and the candidate secondary node 2 may perform admission control according to the cell load and the like.

In addition, step 205 and step 205A may be performed in parallel or sequentially.

Steps 206 and 206A: candidate auxiliary node sends PScell condition update determination message to main node

After receiving the PSCell condition update request message, the candidate secondary node 1 and the candidate secondary node 2 may allocate necessary radio resources, such as random access resources, to the terminal device, and return a PSCell condition update determination message to the master node. Wherein the PSCell condition update determination message may contain radio resources (e.g., SCG config) configured for the terminal device.

In addition, step 206 and step 206A may be performed in parallel or sequentially.

Step 207: the master node sends PScell condition update signaling to the terminal equipment

It should be noted that the PSCell condition update signaling may include at least one PSCell condition update information. The master node may send the at least one PSCell condition update information in a one-time transmission manner, and may send the at least one PSCell condition update information in sequence in a multiple-time transmission manner. The PSCell condition update information may include an identifier of a candidate PSCell, an update trigger condition of the PSCell, a radio resource configured by a candidate secondary node for a terminal device, and so on. Different candidate pscells may have different or the same update trigger conditions.

For example, the master node may additionally indicate that configured PSCell condition updates may be used for continuous updates. In this way, after performing the first PSCell condition update, the terminal device may continue to retain access configuration information of the remaining candidate pscells so as to continue to perform at least one PSCell condition update.

For example, the signaling may include an RRC reconfiguration message.

Step 208: the terminal equipment sends a response message to the master node

It should be noted that the response message may be used to indicate that the terminal device has received signaling for the PSCell condition update.

For example, the response message may include an RRC reconfiguration complete message.

Step 209: the terminal equipment evaluates whether the candidate PScell meets the update triggering condition

It should be noted that, after the terminal device successfully receives the update information of at least one PSCell condition, it may start to evaluate whether the candidate PSCell satisfies the update trigger condition.

Step 210: the terminal device discovers candidate PSCell meeting the update triggering condition

It should be noted that the terminal device may find that at least one candidate PSCell satisfies the update trigger condition. If a plurality of candidate pscells meet the update trigger condition, the terminal device may select the candidate PSCell with the best signal quality as the target PSCell for updating, or may randomly select one candidate PSCell as the target PSCell for updating. Here, it is assumed that the target PSCell determined by the terminal device is PSCell1 administered by the candidate secondary node 1.

Step 211: the terminal equipment indicates the determined target PScell to the master node

It should be noted that, the terminal device indicates the determined target PSCell to the master node, that is, the PSCell (that is, PSCell 1) to which the first PSCell condition update of the terminal device is accessed. Here, the first time is the first time PSCell update after the PSCell condition update signaling received in step 207 with respect to the terminal device. The secondary node to which the target PSCell belongs is a candidate secondary node 1.

For example, the terminal device may indicate the determined target PSCell to the primary node through RRC signaling (e.g., an RRC reconfiguration complete message). Wherein the terminal device may indicate the identity of the target PSCell. In this way, the primary base station, after receiving the RRC signaling, may forward (forward) the data of the data radio bearer established by the terminal device to the candidate auxiliary node 1 in advance, so that the terminal device may receive the downlink data sent by the candidate auxiliary node 1 immediately after accessing the candidate auxiliary node 1.

Step 212: the terminal equipment executes random access to access the candidate auxiliary node 1

It should be noted that, the terminal device may perform random access on the radio resource configured for the terminal device by the candidate auxiliary node 1, so as to access the candidate auxiliary node 1. In the random access procedure, the terminal device may transmit an RRC reconfiguration complete message. For the 4-step random access procedure, the terminal device sends an RRC reconfiguration complete message in message 3 (Msg 3). For the 2-step random access procedure, the terminal device sends an RRC reconfiguration complete message in message a (MsgA).

In addition, the candidate auxiliary node 1 receives the context (context) of the terminal device and saves it in step 204. The context may include, among other things, the history information of the terminal device, but the history information only contains the residence time of the terminal device in the source PSCell at step 204. Meanwhile, since the terminal device is still in the source PSCell between steps 204 to 211, the candidate secondary node 1 needs to update the history information stored by itself.

In particular, the residence time of the terminal device in the source PSCell in the history information received by the candidate secondary node 1 in step 204 needs to be added with a duration, which is a time interval between the time when the candidate secondary node 1 receives the PSCell update request message in step 204 and the time when the candidate secondary node 1 receives the RRC reconfiguration complete message in step 212.

For example, step 211 and step 212 may be performed in parallel, or may be performed before and after.

Step 213: candidate auxiliary node 1 sends PScell update completion message to main node

After the terminal device accesses the candidate auxiliary node 1, the candidate auxiliary node 1 sends a PSCell update completion message to the master node.

This step 213 is, for example, optional.

Step 214: the terminal device continues to evaluate whether the candidate PSCell satisfies the update execution condition

It should be noted that, after the terminal device accesses the candidate auxiliary node 1, the terminal device still keeps the configuration of other candidate pscells, and continues to evaluate whether the candidate pscells meet the update execution condition. When satisfied, a second PSCell condition update is performed. Here, the second time is the second time PSCell update after the PSCell condition update signaling received in step 207 with respect to the terminal device.

Step 215: the terminal device discovers candidate PSCell meeting the update triggering condition

It should be noted that the terminal device may find that at least one candidate PSCell satisfies the update trigger condition. If a plurality of candidate pscells meet the update trigger condition, the terminal device may select the candidate PSCell with the best signal quality as the target PSCell for updating, or may randomly select one candidate PSCell as the target PSCell for updating. Here, it is assumed that the target PSCell determined by the terminal device is PSCell2 governed by the candidate secondary node 2.

Step 216: the terminal equipment indicates the determined target PScell to the master node

It should be noted that, the terminal device indicates the determined target PSCell (i.e. PSCell 2) to the master node, that is, the PSCell accessed by the second PSCell condition update of the terminal device, or that the terminal device is accessing the target PSCell. Wherein, the auxiliary node to which the target PSCell belongs is a candidate auxiliary node 2.

For example, the terminal device may indicate the determined target PSCell to the primary node through RRC signaling (e.g., an RRC reconfiguration complete message). Wherein the terminal device may indicate the identity of the target PSCell. In this way, the primary base station, after receiving the RRC signaling, may forward (forward) the data of the data radio bearer established by the terminal device to the candidate auxiliary node 2 in advance, so that the terminal device may receive the downlink data sent by the candidate auxiliary node 1 immediately after accessing the candidate auxiliary node 2.

Step 217: the terminal equipment executes random access to access the candidate auxiliary node 2

It should be noted that, the terminal device may perform random access through the radio resource configured by the candidate auxiliary node 2 for the terminal device, so as to access the candidate auxiliary node 2. In the random access procedure, the terminal device may transmit an RRC reconfiguration complete message. For the 4-step random access procedure, the terminal device sends an RRC reconfiguration complete message in message 3 (Msg 3). For the 2-step random access procedure, the terminal device sends an RRC reconfiguration complete message in message a (MsgA).

In addition, the candidate secondary node 2 receives the context of the terminal device and saves it in step 204A. The context may include, among other things, the history information of the terminal device, but the history information only contains the residence time of the terminal device in the source PSCell at step 204A. Meanwhile, since the terminal device continues to reside in the source PSCell for a period of time and resides in the PSCell1 governed by the candidate auxiliary node 1 between step 204A and step 217, the candidate auxiliary node 2 may not be aware, and therefore the candidate auxiliary node 2 needs to update the history information of the terminal device stored by itself, so that the history information stored by itself can be more accurate, and the stability, reliability and accuracy of dual connectivity communication under continuous PSCell condition updating are ensured.

For example, step 216 and step 217 may be performed in parallel, or may be performed before or after.

Step 218: candidate auxiliary node 2 sends PScell update completion message to main node

After the terminal device accesses the candidate auxiliary node 2, the candidate auxiliary node 2 sends a PSCell update completion message to the master node.

Illustratively, this step 218 is optional.

3. Updating of history information

1. Description of the invention

As can be seen from the above description of fig. 2, for consecutive PSCell condition updates, when the terminal device performs the first PSCell condition update, the candidate secondary node 1 maintains the history information of the terminal device received at step 204, but the history information only includes the residence time of the terminal device in the source PSCell at step 204. Since the terminal device is still in the source PSCell between steps 204 to 211, the candidate secondary node 1 needs to update the history information stored by itself.

When the terminal device performs the second PSCell condition update, the candidate secondary node 2 stores the history information of the terminal device received at step 204A, but the history information only includes the residence time of the terminal device in the source PSCell (i.e., the PSCell under which the source secondary node is located) at step 204A. Since the terminal device continues to reside in both the source PSCell and the candidate secondary node 1 for a period of time between steps 204A and 217, the candidate secondary node 2 may not know, resulting in inaccurate history information stored by itself, which affects the stability, reliability and accuracy of dual connectivity communication under continuous PSCell condition updates.

In addition, the master node may maintain the history information of the terminal device on the SCG side, which may only include the residence time of the terminal device at the source PSCell. However, since the terminal device may perform two subsequent PSCell condition updates, the terminal device resides in pscell_1 governed by the candidate secondary node 1, but the history information maintained by the primary node may not include the residence time of the terminal device in pscell_1 governed by the candidate secondary node 1, which results in inaccurate history information maintained by the terminal device, thereby affecting the stability, reliability and accuracy of dual connectivity communication under continuous PSCell condition updates.

In summary, in the continuous PSCell condition updating process, the network side (such as the primary node or the secondary node) generally stores or maintains the history information of the terminal device, but the history information stored or maintained by the network side may not be accurate.

Based on this, the embodiment of the present application introduces the first information, and updates the history information of the terminal device stored in the first primary and secondary cells in the continuous PSCell condition update, or updates the history information of the terminal device maintained by the primary node in the continuous primary and secondary cell condition update, where the first primary and secondary cells are primary and secondary cells that are being accessed or have been accessed by the terminal device.

2. Detailed description of the preferred embodiments

The technical scheme, beneficial effects, concepts and the like related to the embodiment of the application are specifically described below.

1) First primary and secondary cell

It should be noted that, in the continuous PSCell condition updating, the network sends access configuration information of at least one candidate PSCell to the terminal device, and the terminal device determines whether the candidate pscells meet the update trigger condition. When the update triggering condition is met, the terminal device executes the first time of PSCell condition update, so that the candidate PSCell is accessed, and the update from the source PSCell to the candidate PSCell is realized. After the first PSCell condition update is performed, the terminal device may continue to retain access configuration information of the remaining candidate pscells, so as to continue to perform the second PSCell condition update, or even the third PSCell condition update.

Since the network configures at least one candidate PSCell, for convenience of description and distinction, the embodiment of the present application introduces a "first primary secondary cell", which may be a primary secondary cell that the terminal device is accessing or has accessed. That is, the first primary and secondary cells may be primary and secondary cells to which the first PSCell condition update is being accessed or has been accessed, and may be primary and secondary cells to which any number of PSCell condition updates are being accessed or have been accessed, which is not particularly limited.

For example, in step 212 of fig. 2, the terminal device is accessing PSCell1 under the jurisdiction of the candidate secondary node 1. At this time, PSCell1 governed by the candidate secondary node 1 is referred to as a "first primary secondary cell".

For another example, between the steps 213 to 216 in fig. 2, the terminal device has already accessed the PSCell managed by the candidate secondary node 1. At this time, PSCell1 governed by the candidate secondary node 1 is referred to as a "first primary secondary cell".

For another example, in step 217 of fig. 2, the terminal device is accessing PSCell2 under the jurisdiction of the candidate secondary node 2. At this time, PSCell2 governed by the candidate secondary node 2 is referred to as a "first primary secondary cell".

For another example, after step 217 of fig. 2, the terminal device has access to PSCell2 under the jurisdiction of the candidate secondary node 2. At this time, PSCell2 governed by the candidate secondary node 2 is referred to as a "first primary secondary cell".

2) Historically accessed primary and secondary cells

It should be noted that, in the continuous PSCell condition updating process, the terminal device may access at least one candidate PSCell in succession except the source PSCell. Wherein, in a period of time, the terminal device can only access one candidate PSCell. In this regard, these accessed pscells may be referred to as "historically accessed primary and secondary cells".

For example, after step 217 of fig. 2, the terminal device has access to PSCell2 under the jurisdiction of the candidate secondary node 2. At this time, the primary and secondary cells accessed in history may include PSCell1 managed by the candidate secondary node 1.

Of course, a primary and secondary cell that has been historically accessed may also be understood as a PSCell that has been accessed before the first primary and secondary cell.

3) History information of terminal equipment

The history information may be used to indicate PSCell information that has been historically accessed by the terminal device, so as to be used for later measurement parameter configuration, etc.

In some possible implementations, the type of history information may include at least one of: primary and secondary cell identification information, residence time information.

Primary and secondary cell identification information may be used to indicate the Identity (ID) of the PSCell that the terminal device is accessing and/or has historically accessed. It is understood that the present application may update the identity of the PSCell.

The residence time information may be used to indicate the residence time of the terminal device in the accessed PSCell. It will be appreciated that the present application may update the residence time of the terminal device in the accessed PSCell.

Specifically, the residence time of the terminal device in the accessed PSCell may include residence time of the terminal device in the source PSCell and/or residence time of the terminal device in the historically accessed PSCell.

4) History information of terminal equipment stored in first primary and secondary cells

It should be noted that, in the continuous PSCell condition updating process, the first primary and secondary cells may store the history information of the terminal device, but the history information stored in the first primary and secondary cells may not be accurate, so that the history information needs to be updated.

In addition, the history information of the terminal device stored in the first primary and secondary cells may be understood as the history information of the terminal device stored in the secondary node to which the first primary and secondary cells belong.

For example, in fig. 2, the candidate auxiliary node 1 to which the terminal device first PSCell condition update is connected stores the history information of the terminal device received at step 204.

For another example, in fig. 2, the candidate secondary node 2 to which the terminal device has been connected for the second PSCell condition update stores the history information of the terminal device received in step 204A.

5) History information of terminal equipment maintained by master node

It should be noted that, during the continuous PSCell condition updating process, the master node may maintain the history information of the terminal device on the SCG side, but the history information of the terminal device maintained by the master node is not accurate, so that the history information needs to be updated.

In addition, the history information of the terminal device on the SCG side may be understood as the history information of the terminal device on the PSCell, and the PSCell may include a source PSCell and/or a PSCell that has been accessed in history.

6) First information

It should be noted that, in the continuous PSCell condition updating, in order to update the history information of the terminal device stored in the first primary and secondary cells that the terminal device is accessing or has accessed, or in order to update the history information of the terminal device maintained by the primary node, the embodiment of the present application introduces the first information. Of course, the first information may be described in other terms, which are not particularly limited.

Since there is a difference between updating the history information held by the first primary and secondary cells and updating the history information maintained by the primary node, this results in a difference between a transmitting end transmitting the first information and a receiving end receiving the first information. In this regard, embodiments of the present application need to be specifically described in terms of "case 1" and "case 2".

Case 1:

In "case 1", the embodiment of the present application discusses updating the history information stored in the first primary and secondary cells according to the first information. The receiving end of the first information is an auxiliary node to which the first primary and auxiliary cells belong, but the sending end of the first information may be a terminal device or a master node. In this regard, "case 1" is in turn divided into "cases 1-1" and "cases 1-2".

Case 1-1:

① Description of the invention

The transmitting end of the first information in "case 1-1" is a terminal device. In view of the above, an example of a communication method according to the embodiment of the present application in "case 1-1" will be described below by taking an interaction between a terminal device and a secondary node to which a first primary and secondary cell belongs as an example. It should be noted that the terminal device may be a chip, a chip module, a communication module, or the like, and the auxiliary node may be a chip, a chip module, a communication module, or the like.

Fig. 3 is a schematic flow chart of a communication method according to an embodiment of the present application, which specifically includes the following steps:

S310, the terminal equipment sends first information, wherein the first information is used for updating the historical information of the terminal equipment stored in the first primary and secondary cells in continuous primary and secondary cell condition updating.

Correspondingly, the secondary node receives the first information.

In this way, when the terminal equipment is accessing or has accessed a new primary and secondary cell, the first information is used to update the history information of the terminal equipment stored in the new primary and secondary cell, so that the stability, reliability and accuracy of dual connectivity communication under continuous PScell condition updating are guaranteed.

② Composition of first information

In "case 1-1", the first information may include at least one of: updating sequence information, historical access time information, first access time interval information, second access time interval information and historical primary and secondary cell identification information.

A. Updating order information

The update order information may be used to indicate an update order in which the first primary and secondary cells are located.

It should be noted that, in the continuous primary and secondary cell condition update, the terminal device may perform multiple PSCell condition updates. Since the terminal device itself knows how many times the PSCell condition update was performed (i.e. how many times the PSCell update was performed after receiving the condition update configuration), the secondary node to which the first primary and secondary cells belong may not know how many times the terminal device has performed PSCell updates before this.

In order to inform the secondary node to which the first primary and secondary cells belong which time the secondary node belongs to the PSCell condition update, the embodiment of the application introduces update order information and indicates the update order in which the first primary and secondary cells are located through the update order information. In this way, the secondary node to which the first primary and secondary cells belong can know how many times the secondary node belongs to the PSCell condition update after receiving the update sequence information.

For example, in fig. 2 described above, when the terminal device is accessing the candidate auxiliary node 2, the candidate auxiliary node 2 may learn, according to the update order information, that the PSCell governed by the candidate auxiliary node 2 belongs to the second PSCell condition update.

In some possible implementations, for the first PSCell update, the terminal device may carry update order information in the first information to indicate that the update order is 1, or may not update order information in the first information. Wherein, the first information carries update order information, which can be understood that the network explicitly indicates that the update order is 1; no update order information is carried in the first information, and it is understood that the network implicitly indicates (non-explicitly indicates) that the update order is 1. While the update order is 1, it is understood that the first PSCell update.

B. Historical access time information

The historical access time information can be used for indicating the access time of the PScell which is accessed by the terminal equipment in the historical mode and can also be used for indicating the access time of the first primary and secondary cells. The access time of the PSCell accessed by the terminal device in the history may include at least one of access time of all pscells accessed before the first primary and secondary cells, access time of a part of pscells accessed before the first primary and secondary cells, and the like.

It should be noted that, in the continuous PSCell condition updating process, the terminal device may access at least one candidate PSCell in succession except the source PSCell. Wherein, the terminal device only accesses one candidate PSCell in a period of time. Since the terminal device itself knows the access time of the PSCell that has been accessed in the history, the secondary node to which the first primary and secondary cells belong may not know the access time of the PSCell that has been accessed before.

In order to inform all or part of the accessed candidate pscells of the access time, the embodiment of the application introduces historical access time information and indicates the access time of the primary and secondary cells accessed by the terminal equipment in a historical way through the historical access time information.

In this way, the secondary node to which the first primary and secondary cells belong can learn the access time of the PSCell accessed before the first primary and secondary cells after receiving the historical access time information, so as to determine the residence time in the accessed PSCell according to the access times.

In addition, the access time of the primary and secondary cells that the terminal device has historically accessed may include the access time of all or part of the PSCell that the terminal device has historically accessed.

For example, in fig. 2, when the terminal device is accessing the candidate auxiliary node 2, the candidate auxiliary node 2 may learn the access time of the terminal device accessing the PSCell managed by the candidate auxiliary node 1 according to the historical access time information.

For another example, the terminal device has historically accessed 4 pscells, and the access order of the 4 pscells is pscell_1, pscell_2, pscell_3, and pscell_4 in sequence. In this way, when the PSCell condition for the fifth time updates the access pscell_5, the secondary node to which pscell_5 belongs may learn respective access times of all or part of pscells in the 4 pscells according to the historical access time information (refer to access times of the terminal device for accessing the pscells, which are the same elsewhere herein, and will not be described in detail). The access time of pscell_1 is T1 (the T1 may refer to an exact time point, which is not described herein), and the access time of pscell_2 is T2 (the T2 may refer to an exact time point, which is not described herein), etc.

In addition, the "access time" in the embodiment of the present application may include a transmission time of the RRC reconfiguration complete message or a reception time of the RRC reconfiguration complete message. This is because, for the terminal device, the access time may be the transmission time of the RRC reconfiguration complete message; and for the secondary node to which the first primary and secondary cells belong, the access time may be the reception time of the RRC reconfiguration complete message.

Of course, the embodiment of the application can make the sending time of the RRC reconfiguration complete message equal to the receiving time of the RRC reconfiguration complete message.

Further, the RRC reconfiguration complete message may be in a 2-step random access procedure or a 4-step random access procedure.

For example, in step 217 of fig. 2 described above, the terminal device performs random access in order to access the candidate secondary node 2. In the random access procedure, the terminal device may transmit an RRC reconfiguration complete message. For a 4-step random access procedure, the terminal device may send an RRC reconfiguration complete message in message 3 (Msg 3). For a 2-step random access procedure, the terminal device may send an RRC reconfiguration complete message in message a (MsgA).

C. first access time interval information

The first access time interval information may be used to indicate a time interval between an access time of the first primary and secondary cells and an access time of a PSCell that has been historically accessed by the terminal device. The access time of the PSCell accessed by the terminal device in the history may include at least one of an access time of all pscells accessed before the first primary and secondary cells, an access time of a part of pscells accessed before the first primary and secondary cells, and the like.

It should be noted that, in the continuous PSCell condition updating process, the terminal device may access at least one candidate PSCell in succession except the source PSCell. Wherein, the terminal device only accesses one candidate PSCell in a period of time. Since the terminal device itself knows the access time of the PSCell that has been accessed in the history and the access time of the first primary and secondary cells, the secondary node to which the first primary and secondary cells belong may not know the access time of the PSCell that has been accessed before.

In order to inform the access time of the first primary and secondary cells (refer to the access time of the terminal device accessing the first primary and secondary cells) and the access time of all or part of the accessed candidate pscells, the embodiment of the application introduces first access time interval information and indicates the time interval between the access time of the first primary and secondary cells and the access time of the PSCell accessed by the terminal device in history through the first access time interval information.

In this way, after receiving the first access time interval information, the auxiliary node to which the first primary and secondary cells belong can learn the time interval between the access time of the auxiliary node and the access time of the primary and secondary cells which the terminal equipment has historically accessed. And the auxiliary node of the first primary and secondary cells knows the access time of the auxiliary node, so that the residence time in the accessed PScell can be determined according to the time interval.

In addition, the time interval between the access time of the first primary and secondary cells and the access time of the primary and secondary cells that have been accessed by the terminal device in history may include a time interval between the access time of the first primary and secondary cells and the access time of all or part of the primary and secondary cells that have been accessed by the terminal device in history.

For example, the terminal device has historically accessed 4 pscells, and the access order of the 4 pscells is pscell_1, pscell_2, pscell_3, and pscell_4 in sequence. Thus, when the PSCell condition of the fifth time updates the access pscell_5, the secondary node to which pscell_5 belongs can learn the time interval between its own access time and the access time of all or part of pscells in the 4 pscells according to the first access time interval information. The access time of pscell_5 is T5 (the T5 may refer to an exact time point, which will not be described herein), and the access time of pscell_1 is T1. Thus, the time interval between the access time of PSCell_5 and the access time of PSCell_1 is T5-T1.

D. Second access time interval information

The second access time interval information may be used to indicate a time interval between access times of two adjacent pscells among pscells that have been historically accessed by the terminal device. The access time of the PSCell accessed by the terminal device in the history may include at least one of an access time of all pscells accessed before the first primary and secondary cells, an access time of a part of pscells accessed before the first primary and secondary cells, and the like.

In order to inform the time interval between the access times of two adjacent pscells in the historically accessed pscells, the embodiment of the present application introduces second access time interval information, and indicates the time interval between the access times of two adjacent pscells through the second access time interval information.

In this way, after receiving the second access time interval information, the secondary node to which the first primary and secondary cells belong can learn the time interval between the access times of two adjacent pscells, so as to determine the residence time in the accessed pscells according to the access times.

For example, the terminal device has historically accessed 4 pscells, and the access order of the 4 pscells is pscell_1, pscell_2, pscell_3, and pscell_4 in sequence. Thus, when the fifth PSCell condition updates access to pscell_5, the secondary node to which pscell_5 belongs can learn the time interval between the access times of two pscells in the 4 pscells according to the second access time interval information. Wherein, the access time of pscell_1 is T1, and the access time of pscell_2 is T2. Thus, the time interval between the access time of PSCell_2 and the access time of PSCell_1 is T2-T1.

F. Historic primary and secondary cell identification information

The history primary and secondary cell identification information can be used for indicating the identification of the PSCell which is accessed by the terminal equipment in the history, and can also be used for indicating the identification of the first primary and secondary cells. The PSCell that the terminal device has historically accessed may include at least one of all pscells that have accessed before the first primary and secondary cells, some pscells that have accessed before the first primary and secondary cells, and so on.

It should be noted that, in the continuous PSCell condition updating process, the terminal device may access at least one candidate PSCell in succession except the source PSCell. Wherein, the terminal device only accesses one candidate PSCell in a period of time. Since the terminal device itself knows the identity of the PSCell that has been accessed in the history, the secondary node to which the first primary and secondary cells belong may not know the identity of the PSCell that has been accessed before.

In order to inform the historic access identities of the PSCells, the embodiment of the application introduces the historic primary and secondary cell identification information and indicates the historic access identities of the primary and secondary cells of the terminal equipment through the historic primary and secondary cell identification information.

In this way, the secondary node to which the first primary and secondary cells belong can learn which PSCell histories have been accessed after receiving the history primary and secondary cell identification information.

In some possible implementations, the history primary and secondary cell identification information may indicate in sequence the identities of all pscells that the terminal device has historically accessed. At this time, the history primary and secondary cell identification information may implicitly indicate the update order information described above. That is, the first information may indicate what number of PSCell updates is performed by the history primary and secondary cell identification information without including update order information.

③ Transmission of first information

In case 1-1, the first information may be carried by one of an RRC reconfiguration complete message, message a, and side information (UE assistance information) of the terminal device.

For example, in fig. 2 described above, if the terminal device transmits the first information in step 212 or step 217, the first information may be carried by the RRC reconfiguration complete message or message a.

For another example, in fig. 2, if the terminal device transmits the first information after step 212 or step 217, the first information may be carried by the auxiliary information of the terminal device.

In some possible implementations, the terminal device may send the first information after discovering from the plurality of candidate pscells that the first primary and secondary cells satisfy the update trigger condition.

Correspondingly, the secondary node to which the first primary and secondary cells belong may receive the first information after the terminal device discovers that the first primary and secondary cells satisfy the update trigger condition from the plurality of candidate pscells.

For example, in fig. 2 described above, the terminal device finds in step 215 that there are candidate pscells satisfying the update trigger condition, but the terminal device needs to transmit the first information in step 217 or after step 217.

In some possible implementations, the terminal device may send the first information after itself sends indication information to the primary node, which may be used to indicate that the terminal device is accessing the first primary secondary cell.

Correspondingly, the secondary node to which the first primary and secondary cells belong may receive the first information after the terminal device sends the indication information to the primary node.

For example, in fig. 2 described above, the terminal device indicates to the master node that itself is accessing the target PSCell in step 216, and the terminal device may transmit the first information after step 216.

In some possible implementations, the terminal device may send the first information when itself sends indication information to the primary node, which may be used to indicate that the terminal device is accessing the first primary and secondary cell.

Correspondingly, the secondary node to which the first primary and secondary cells belong may receive the first information when the terminal device sends the indication information to the primary node.

For example, in fig. 2 described above, the terminal device indicates to the primary node that itself is accessing the target PSCell in step 216, while the terminal device transmits the first information to the candidate secondary nodes.

④ Updating of history information

In combination with the content in the above "3) history information of the terminal device", the type of the history information may include primary and secondary cell identification information and/or residence time information.

In some possible examples, since the first information may include historical primary and secondary cell identification information, the secondary node may update the primary and secondary cell identification information in the historical information according to the historical primary and secondary cell identification information in the first information.

In some possible examples, since the first information may include at least one of historical access time information, first access time interval information, and second access time interval information, the first primary and secondary cells may learn, after receiving the first information, an access time of a primary and secondary cell to which the terminal device first accesses after the source PSCell. And because the first primary and secondary cells know the time when the first primary and secondary cells receive the primary and secondary cell condition updating request, the secondary node to which the first primary and secondary cells belong can update the residence time of the terminal equipment in the source PScell according to the time interval between the time when the first primary and secondary cells receive the primary and secondary cell condition updating request and the access time of the PScell which is accessed for the first time after the terminal equipment is accessed to the source PScell.

That is, the residence time of the terminal device in the source PSCell may be updated according to a time interval between the time when the first primary and secondary cells receive the primary and secondary cell condition update request and the access time of the PSCell to which the terminal device first accesses after the source primary and secondary cells.

In some possible examples, since the first information may include first access time interval information, the first primary and secondary cells may learn a time interval between access times of two neighboring pscells after receiving the first information, so that the secondary node to which the first primary and secondary cells belong may update residence time of the terminal device in the primary and secondary cells that have been accessed historically according to the time interval between access times of the two neighboring pscells.

That is, the residence time of the terminal device in the history-accessed PSCell may be updated according to the time interval between the access times of two adjacent pscells in the history-accessed PSCell of the terminal device.

In some possible examples, since the first information may include the second access time interval information, the secondary node to which the first primary and secondary cells belong may learn, after receiving the first information, a time interval between an access time of the PSCell that the terminal device has historically accessed and an access time of the secondary node itself. The secondary node of the first primary and secondary cells knows the access time of the secondary node (the terminal equipment is accessed), so the secondary node of the first primary and secondary cells can update the residence time of the terminal equipment in the PScell which is accessed according to the time interval between the access time of the PScell which is accessed by the terminal equipment in history and the access time of the secondary node.

That is, the residence time of the terminal device in the history-accessed PSCell may be updated according to the time interval between the access time of the terminal device in the history-accessed PSCell and the access time of the first primary and secondary cells.

Cases 1-2:

① Description of the invention

The sender of the first information in "case 1-2" is the master node. In view of the above, an example of a communication method according to the embodiment of the present application in "case 1-2" will be described below by taking an interaction between a primary node and a secondary node to which a first primary and secondary cell belongs as an example. It should be noted that the primary node may be a chip, a chip module, a communication module, or the like, and the secondary node may be a chip, a chip module, a communication module, or the like.

Fig. 4 is a schematic flow chart of a communication method according to an embodiment of the present application, which specifically includes the following steps:

S410, the master node sends first information, wherein the first information is used for updating the historical information of the terminal equipment stored in the first primary and secondary cells in continuous primary and secondary cell condition updating.

Correspondingly, the secondary node receives the first information.

② Composition of first information

In "case 1-2", the first information may include at least one of: updating sequence information, historical access time information, second access time interval information and historical primary and secondary cell identification information.

A. Updating order information

It should be noted that, in the continuous primary and secondary cell condition update, the terminal device may perform multiple PSCell condition updates. Since the secondary node to which the PSCell that the terminal device has historically accessed interacts with the primary node, the primary node itself may know how many times the PSCell condition is updated, but the secondary node to which the first primary and secondary cells belong may not know that the terminal device has performed several PSCell updates before.

For example, in step 213 of fig. 2, after the terminal device accesses the candidate secondary node 1, the candidate secondary node 1 sends a PSCell update completion message to the primary node. The PSCell update completion message may include information of how many times the PSCell condition is updated. In this way, the master node can know how many times the PSCell condition is updated from the PSCell update completion message.

In addition, the update sequence information here may be similar to that described in the above "case 1-1", and will not be described again.

B. Historical access time information

It should be noted that, in the continuous PSCell condition updating process, the terminal device may access at least one candidate PSCell in succession except the source PSCell. Wherein, the terminal device only accesses one candidate PSCell in a period of time. Because the auxiliary node to which the PSCell accessed by the terminal equipment in history interacts with the main node, the main node knows the access time of the PSCell accessed by the terminal equipment in history, but the auxiliary node to which the first main and auxiliary cells belong does not know the access time of the PSCell accessed by the terminal equipment before the first main and auxiliary cells.

For example, in step 213 of fig. 2, after the terminal device accesses the candidate secondary node 1, the candidate secondary node 1 sends a PSCell update completion message to the primary node. The PSCell update complete message may include an access time of the PSCell of the candidate secondary node 1. In this way, the primary node can learn the access time of the PSCell of the candidate secondary node 1 according to the PSCell update completion message.

In addition, the historical access time information may be similar to the description in the above "case 1-1", and will not be described again.

C. second access time interval information

It should be noted that, in the continuous PSCell condition updating process, the terminal device may access at least one candidate PSCell in succession except the source PSCell. Wherein, the terminal device only accesses one candidate PSCell in a period of time. Since the secondary node to which the PSCell that has been accessed by the terminal device in history interacts with the primary node, the primary node itself knows the access time of the PSCell that has been accessed by the terminal device in history, but the secondary node to which the first primary and secondary cells belong may not know the access time of the PSCell that has been accessed by the terminal device before.

In addition, the second access time interval information may be similar to the description in the above "case 1-1", and will not be described again.

D. historic primary and secondary cell identification information

The history primary and secondary cell identification information can be used for indicating the identification of the primary and secondary cells which are accessed by the terminal equipment in history.

It should be noted that, in the continuous PSCell condition updating process, the terminal device may access at least one candidate PSCell in succession except the source PSCell. Wherein, the terminal device only accesses one candidate PSCell in a period of time. Since the secondary node to which the PSCell that has been accessed by the terminal device in history interacts with the primary node, the primary node itself knows the identity of the PSCell that has been accessed by the terminal device in history, but the secondary node to which the first primary and secondary cells belong may not know the identity of the PSCell that has been accessed by the terminal device before.

In addition, the history primary and secondary cell identification information may be similar to the description in the above "case 1-1", and will not be described in detail.

③ Transmission of first information

In case 1-2, the first information may be carried by the secondary node modification request message.

It may be understood that the master node sends a secondary node modification request message to the secondary node, where the secondary node modification request message carries the first information.

In some possible implementations, the primary node may send the first information after the terminal device discovers that the first primary and secondary cells satisfy the update trigger condition from the plurality of candidate pscells.

For example, in fig. 2 described above, the terminal device finds in step 215 that there are candidate pscells that satisfy the update trigger condition. Then, after step 215, the master node transmits the first information.

In some possible implementations, the primary node may send the first information after the terminal device sends the indication information to the primary node, which may be used to indicate that the terminal device is accessing the first primary secondary cell.

For example, in fig. 2 described above, the terminal device indicates to the master node that itself is accessing the target PSCell in step 216. The master node then transmits the first information after step 216.

Case 2:

In case 2, embodiments of the present application discuss updating history information maintained by a master node based on first information. The receiving end of the first information is a master node, but the sending end of the first information may be a terminal device, or may be an auxiliary node to which the first primary and auxiliary cells belong. In this regard, "case 2" is in turn divided into "case 2-1" and "case 2-2".

Case 2-1:

① Description of the invention

The transmitting end of the first information in "case 2-1" is a terminal device. In view of the above, an example of a communication method according to the embodiment of the present application in "case 2-1" will be described below by taking an interaction between a terminal device and a master node as an example. It should be noted that the terminal device may be a chip, a chip module, a communication module, or the like, and the master node may be a chip, a chip module, a communication module, or the like.

Fig. 5 is a schematic flow chart of a communication method according to an embodiment of the present application, which specifically includes the following steps:

S510, the terminal equipment sends first information, wherein the first information is used for updating the history information of the terminal equipment maintained by the master node in continuous primary and secondary cell condition updating.

Correspondingly, the master node receives the first information.

In this way, when the terminal equipment is accessing or has accessed a new primary and secondary cell, the history information of the terminal equipment maintained by the primary node is updated through the first information, so that the stability, reliability and accuracy of the dual-connectivity communication under continuous PScell condition updating are guaranteed.

② Composition of first information

In "case 2-1", the first information may include at least one of: updating sequence information, historical access time information, first access time interval information, second access time interval information and historical primary and secondary cell identification information.

It should be noted that, the update sequence information, the historical access time information, the first access time interval information, the second access time interval information, and the historical primary and secondary cell identification information are similar to those described in the above "case 1-1", and are not repeated here.

③ Transmission of first information

In case 2-1, the first information may be carried by one of an RRC reconfiguration complete message, and side information of the terminal device.

For example, in fig. 2 described above, if the terminal device transmits the first information in step 211 or step 216, the first information may be carried by the RRC reconfiguration complete message.

For another example, in fig. 2, if the terminal device transmits the first information after step 211 or step 216, the first information may be carried by the auxiliary information of the terminal device.

Correspondingly, the primary node may receive the first information after the terminal device finds that the first primary and secondary cells satisfy the update trigger condition from the plurality of candidate pscells.

For example, in fig. 2 described above, the terminal device finds in step 215 that there are candidate pscells satisfying the update trigger condition, and the terminal device may transmit the first information in step 216 or after step 216.

Correspondingly, the master node may receive the first information after the terminal device sends the indication information to the master node.

For example, in fig. 2 described above, the terminal device indicates to the master node that itself is accessing the target PSCell in step 216, but the terminal device needs to send the first information after step 216.

Correspondingly, the master node may receive the first information when the terminal device sends the indication information to the master node.

For example, in fig. 2 described above, the terminal device sends the first information to the master node in step 216.

Case 2-2:

① Description of the invention

The transmitting end of the first information in "case 2-2" is the secondary node to which the first primary and secondary cells belong. In view of the above, an example of a communication method according to the embodiment of the present application in "case 2-2" will be described below by taking an interaction between a primary node and a secondary node to which a first primary and secondary cell belongs as an example. It should be noted that the primary node may be a chip, a chip module, a communication module, or the like, and the secondary node may be a chip, a chip module, a communication module, or the like.

Fig. 6 is a schematic flow chart of a communication method according to an embodiment of the present application, which specifically includes the following steps:

s610, the auxiliary node sends first information, wherein the first information is used for updating the history information of the terminal equipment maintained by the main node in continuous primary and secondary cell condition updating.

Correspondingly, the master node receives the first information.

② Composition of first information

In "case 2-2", the first information may include at least one of: updating sequence information, historical access time information, first access time interval information, second access time interval information and historical primary and secondary cell identification information.

It should be noted that, the update sequence information, the historical access time information, the first access time interval information, the second access time interval information, and the historical primary and secondary cell identification information may be similar to those described in the above "case 1-1", and will not be repeated.

③ Transmission of first information

In case 2-2, the first information may be carried by the secondary node modification request message.

It may be understood that the secondary node sends a secondary node modification request message to the primary node, the secondary node modification request message carrying the first information.

In some possible implementations, the secondary node may send the first information after finding that the first primary and secondary cells in the plurality of candidate pscells of the terminal device satisfy the update trigger condition.

In some possible implementations, the secondary node may send the first information after the terminal device accesses the first primary secondary cell, and the indication information may be used to indicate that the terminal device is accessing the first primary secondary cell.

Correspondingly, the primary node may receive the first information after the terminal device accesses the first primary and secondary cells.

For example, in fig. 2 described above, candidate secondary node 2 transmits the first information after step 217.

4. An illustration of a communication device

1. Description of the invention

The foregoing description of the embodiments of the present application has been presented primarily from a method-side perspective. It will be appreciated that, in order to implement the above-mentioned functions, the terminal device includes corresponding hardware structures and/or software modules for performing the respective functions. Those of skill in the art will readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Those skilled in the art may implement the described functionality using different approaches for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

The embodiment of the application can divide the functional units of the terminal equipment according to the method example. For example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated in one processing unit. The integrated units described above may be implemented either in hardware or in software program modules. It should be noted that, in the embodiment of the present application, the division of the units is schematic, but only one logic function is divided, and another division manner may be adopted in actual implementation.

In the case of using integrated units, fig. 7 is a block diagram showing the functional units of a communication apparatus according to an embodiment of the present application. The communication apparatus 700 includes: a transmitting unit 701.

In some possible implementations, the transmitting unit 701 may be a module unit for processing or transmitting signals, data, information, and the like, which is not particularly limited.

In some possible implementations, the communication device 700 may also include a storage unit for storing computer program code or instructions executed by the communication device 700. The memory unit may be a memory.

In some possible implementations, the communication device 700 may be a chip or a chip module.

In some possible implementations, the sending unit 701 may be integrated in other units.

For example, the transmitting unit 701 may be integrated in a communication unit.

For another example, the transmitting unit 701 may be integrated in a processing unit.

The communication unit may be a communication interface, a transceiver circuit, or the like.

The processing unit may be a processor or controller, and may be, for example, a baseband processor, a baseband chip, a central processing unit (central processing unit, CPU), a general purpose processor, a digital signal processor (DIGITAL SIGNAL processor, DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (field programmable GATE ARRAY, FPGA), or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various exemplary logical blocks, modules, and circuits described in connection with the present disclosure. The processing unit may also be a combination that implements computing functionality, e.g., comprising one or more microprocessor combinations, a combination of DSPs and microprocessors, etc.

In some possible implementations, the communication apparatus 700 is configured to perform any step, such as sending or receiving data, performed by a terminal device/chip module, etc., as in the above-described method embodiments. The following is a detailed description.

In particular implementation, the sending unit 701 is configured to perform any step in the method embodiments described above, and when performing an action such as sending, other units may be selectively called to complete the corresponding operation. The following is a detailed description.

And a sending unit 701, configured to send first information, where the first information is used to update, in a continuous primary and secondary cell condition update, historical information of a terminal device stored in a first primary and secondary cell, or update, in a continuous primary and secondary cell condition update, historical information of a terminal device maintained by a primary node, where the first primary and secondary cell is a primary and secondary cell that is or has been accessed by the terminal device.

In this way, when the terminal equipment is accessing or has accessed a new primary and secondary cell, the first information is used to update the history information of the terminal equipment stored in the new primary and secondary cell, or update the history information of the terminal equipment maintained by the primary node, so that the stability, reliability and accuracy of dual-connectivity communication under continuous PScell condition update are guaranteed.

It should be noted that, the specific implementation of each operation in the embodiment shown in fig. 7 may be described in detail in the above-shown method embodiment, and will not be described in detail herein.

2. Some possible implementations

Some possible implementations are described below. Some specific descriptions may be found in the foregoing, and will not be repeated here.

In some possible implementations, the first information may include at least one of:

Update order information, wherein the update order information is used for indicating the update order of the first primary and secondary cells;

Historical access time information, wherein the historical access time information is used for indicating the access time of a primary cell and a secondary cell which are accessed by the terminal equipment in a historical manner;

The first access time interval information is used for indicating the time interval between the access time of the first primary and secondary cells and the access time of the primary and secondary cells accessed by the terminal equipment in history;

The second access time interval information is used for indicating the time interval between the access time of two adjacent primary and secondary cells in the primary and secondary cells which are accessed by the terminal equipment in history;

the history primary and secondary cell identification information is used for indicating the identification of the primary and secondary cells which are accessed by the terminal equipment in history.

In some possible implementations, the access time may include a transmission time of the RRC reconfiguration complete message or a reception time of the RRC reconfiguration complete message.

In some possible implementations, the RRC reconfiguration complete information is in a 2-step random access procedure or a 4-step random access procedure.

In some possible implementations, the type of history information may include at least one of:

primary and secondary cell identification information, wherein the primary and secondary cell identification information is used for indicating the identification of a primary and secondary cell which is accessed by terminal equipment and/or accessed in history;

residence time information, which is used to indicate residence time of the terminal device in the accessed primary and secondary cells.

In some possible implementations, the residence time of the terminal device in the accessed primary and secondary cells may include the residence time of the terminal device in the source primary and secondary cells and/or the residence time of the terminal device in the historically accessed primary and secondary cells.

In some possible implementations, the first information may be carried by one of an RRC reconfiguration complete message, message a, and side information of the terminal device.

In some possible implementations, the first information is sent after the terminal device finds that the first primary and secondary cells satisfy the update trigger condition from among the plurality of candidate primary and secondary cells; or alternatively

Is sent after the terminal equipment sends the indication information to the main node; or alternatively

The method comprises the steps that the method is carried out when the terminal equipment sends indication information to the master node, wherein the indication information is used for indicating that the terminal equipment is accessing to a first primary and secondary cell.

5. Yet another exemplary illustration of a communication device

1. Description of the invention

The foregoing description of the embodiments of the present application has been presented primarily from a method-side perspective. It will be appreciated that the host node, in order to implement the above-described functions, includes corresponding hardware structures and/or software modules that perform the respective functions. Those of skill in the art will readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Those skilled in the art may implement the described functionality using different approaches for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

The embodiment of the application can divide the functional units of the master node according to the method example. For example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated in one processing unit. The integrated units described above may be implemented either in hardware or in software program modules. It should be noted that, in the embodiment of the present application, the division of the units is schematic, but only one logic function is divided, and another division manner may be adopted in actual implementation.

In the case of using integrated units, fig. 8 is a functional unit block diagram of still another communication apparatus according to an embodiment of the present application. The communication apparatus 800 includes: a transmitting unit 801.

In some possible implementations, the transmitting unit 801 may be a module unit for processing signals, data, information, and the like, which is not particularly limited.

In some possible implementations, the communication device 800 may also include a storage unit for storing computer program code or instructions executed by the communication device 800. The memory unit may be a memory.

In some possible implementations, the communication device 800 may be a chip or a chip module.

In some possible implementations, the transmitting unit 801 may be integrated in other units.

For example, the transmission unit 801 may be integrated in a communication unit.

For another example, the transmission unit 801 may be integrated in a processing unit.

In some possible implementations, the communication device 800 is configured to perform any step, such as sending or receiving data, performed by a host node/chip module, etc., as in the method embodiments described above. The following is a detailed description.

In particular implementation, the sending unit 801 is configured to perform any step in the method embodiments described above, and when performing an action such as sending, other units may be selectively called to complete the corresponding operation. The following is a detailed description.

And a sending unit 801, configured to send first information, where the first information is used to update, in a continuous primary and secondary cell condition update, historical information of a terminal device stored in a first primary and secondary cell, where the first primary and secondary cell is a primary and secondary cell to which the terminal device is accessing or has accessed.

It can be seen that, when the terminal device is accessing or has accessed a new primary and secondary cell, updating the history information of the terminal device stored in the new primary and secondary cell is realized through the first information, so that stability, reliability and accuracy of dual connectivity communication under continuous PSCell condition updating are guaranteed.

It should be noted that, the specific implementation of each operation in the embodiment shown in fig. 8 may be described in detail in the above-shown method embodiment, and will not be described in detail herein.

2. Some possible implementations

In some possible implementations, the first information includes at least one of:

In some possible implementations, the access time includes a transmission time of a radio resource control, RRC, reconfiguration complete message or a reception time of an RRC reconfiguration complete message.

In some possible implementations, the RRC reconfiguration complete message is in a 2-step random access procedure or a 4-step random access procedure.

In some possible implementations, the type of history information includes at least one of:

In some possible implementations, the residence time of the terminal device in the accessed primary and secondary cells includes the residence time of the terminal device in the source primary and secondary cells and/or the residence time of the terminal device in the historically accessed primary and secondary cells.

In some possible implementations, the first information is carried by the secondary node modification request message.

The method comprises the steps that the indication information is sent after the main node receives the indication information from the terminal equipment, and the indication information is used for indicating that the terminal equipment is accessing to the first main secondary cell.

6. Yet another exemplary illustration of a communication device

1. Description of the invention

In the case of using integrated units, fig. 9 is a block diagram showing the functional units of still another communication apparatus according to an embodiment of the present application. The communication apparatus 900 includes: a receiving unit 901.

In some possible implementations, the receiving unit 901 may be a module unit for processing signals, data, information, and the like, which is not particularly limited.

In some possible implementations, the communication device 900 may also include a storage unit for storing computer program code or instructions executed by the communication device 900. The memory unit may be a memory.

In some possible implementations, the communication device 900 may be a chip or a chip module.

In some possible implementations, the receiving unit 901 may be integrated in other units.

For example, the receiving unit 901 may be integrated in a communication unit.

As another example, the receiving unit 901 may be integrated in a processing unit.

In some possible implementations, the communication device 900 is configured to perform any of the steps performed by the host node/chip module, etc., as in the method embodiments described above, such as sending or receiving data, etc. The following is a detailed description.

In particular implementation, the receiving unit 901 is configured to perform any step in the method embodiments described above, and when performing an action such as sending, other units may be selectively called to complete the corresponding operation. The following is a detailed description.

The receiving unit 901 is configured to receive first information, where the first information is used to update, in a continuous primary and secondary cell condition update, history information of a terminal device maintained by a primary node, and the first primary and secondary cell is a primary and secondary cell that is or has been accessed by the terminal device.

It can be seen that, when the terminal device is accessing or has accessed a new primary and secondary cell, updating the history information of the terminal device maintained by the primary node is realized through the first information, so that stability, reliability and accuracy of dual connectivity communication under continuous PSCell condition updating are guaranteed.

It should be noted that, the specific implementation of each operation in the embodiment shown in fig. 9 may be described in detail in the above-shown method embodiment, and will not be described in detail herein.

2. Some possible implementations

In some possible implementations, the first information is carried by one of an RRC reconfiguration complete message, side information of the terminal device.

In some possible implementations, the first information is received after the terminal device finds that the first primary and secondary cell satisfies the update trigger condition from among the plurality of candidate primary and secondary cells; or alternatively

Is received after the main node receives the indication information from the terminal device; or alternatively

Is received when the primary node receives indication information from the terminal device, the indication information being used to indicate that the terminal device is accessing the first primary and secondary cell.

7. Yet another exemplary illustration of a communication device

1. Description of the invention

The foregoing description of the embodiments of the present application has been presented primarily from a method-side perspective. It will be appreciated that the secondary node, in order to implement the above-described functions, includes corresponding hardware structures and/or software modules that perform the respective functions. Those of skill in the art will readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Those skilled in the art may implement the described functionality using different approaches for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

The embodiment of the application can divide the functional units of the auxiliary nodes according to the method example. For example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated in one processing unit. The integrated units described above may be implemented either in hardware or in software program modules. It should be noted that, in the embodiment of the present application, the division of the units is schematic, but only one logic function is divided, and another division manner may be adopted in actual implementation.

In the case of employing integrated units, fig. 10 is a functional unit block diagram of still another communication apparatus according to an embodiment of the present application. The communication apparatus 1000 includes: the receiving unit 1001.

In some possible implementations, the receiving unit 1001 may be a module unit for processing signals, data, information, and the like, which is not particularly limited.

In some possible implementations, the communications device 1000 may also include a storage unit for storing computer program code or instructions executed by the communications device 1000. The memory unit may be a memory.

In some possible implementations, the communications device 1000 may be a chip or a chip module.

In some possible implementations, the receiving unit 1001 may be integrated in other units.

For example, the receiving unit 1001 may be integrated in a communication unit.

As another example, the receiving unit 1001 may be integrated in a processing unit.

In some possible implementations, the communication device 1000 is configured to perform any of the steps performed by the host node/chip module, etc., as in the method embodiments described above, such as sending or receiving data, etc. The following is a detailed description.

In particular implementations, the receiving unit 1001 is configured to perform any of the steps of the method embodiments described above, and when performing an action such as sending, optionally invoke other units to complete the corresponding operation. The following is a detailed description.

The receiving unit 1001 is configured to receive first information, where the first information is used to update, in a continuous primary and secondary cell condition update, historical information of a terminal device stored in a first primary and secondary cell, and the first primary and secondary cell is a primary and secondary cell to which the terminal device is accessing or has accessed.

It can be seen that, when the terminal device is accessing or has accessed a new primary and secondary cell, updating the history information stored in the first primary and secondary cell is realized through the first information, so that stability, reliability and accuracy of dual connectivity communication under continuous PSCell condition updating are guaranteed.

It should be noted that, the specific implementation of each operation in the embodiment shown in fig. 10 may be described in detail in the above-shown method embodiment, which is not described in detail herein.

2. Some possible implementations

In some possible implementations, the residence time of the terminal device in the source primary and secondary cells is updated according to a time interval between a time when the primary and secondary cell condition update request is received by the first primary and secondary cell and an access time of the primary and secondary cell to which the terminal device accesses for the first time after the source primary and secondary cells.

In some possible implementations, the residence time of the terminal device in the primary and secondary cells accessed in history is updated according to the time interval between the access times of two adjacent primary and secondary cells in the primary and secondary cells accessed in history by the terminal device;

Or updating according to the time interval between the access time of the primary and secondary cells accessed by the terminal equipment history and the access time of the first primary and secondary cells.

In some possible implementations, the first information is carried by one of RRC reconfiguration complete message, message a, assistance information of the terminal device.

Is received after the terminal device sends the indication information to the master node; or alternatively

Is received when the terminal device sends indication information to the primary node, the indication information being used to indicate that the terminal device is accessing the first primary and secondary cell.

8. Yet another exemplary illustration of a communication device

1. Description of the invention

In the case of employing integrated units, fig. 11 is a functional unit block diagram of still another communication apparatus according to an embodiment of the present application. The communication apparatus 1100 includes: a transmitting unit 1101.

In some possible implementations, the transmitting unit 1101 may be a module unit for processing signals, data, information, and the like, which is not particularly limited.

In some possible implementations, the communications apparatus 1100 can also include a storage unit for storing computer program code or instructions executed by the communications apparatus 1100. The memory unit may be a memory.

In some possible implementations, the communication device 1100 may be a chip or a chip module.

In some possible implementations, the sending unit 1101 may be integrated in other units.

For example, the transmission unit 1101 may be integrated in a communication unit.

For another example, the transmitting unit 1101 may be integrated in the processing unit.

In some possible implementations, the communication device 1100 is configured to perform any of the steps performed by the host node/chip module, etc., as in the method embodiments described above, such as sending or receiving data, etc. The following is a detailed description.

In particular implementation, the sending unit 1101 is configured to perform any step in the method embodiments described above, and when performing an action such as sending, other units may be selectively invoked to complete the corresponding operation. The following is a detailed description.

A sending unit 1101, configured to send first information, where the first information is used to update, in a continuous primary and secondary cell condition update, history information of a terminal device maintained by a primary node, and the first primary and secondary cell is a primary and secondary cell that is or has been accessed by the terminal device.

It should be noted that, the specific implementation of each operation in the embodiment shown in fig. 11 may be described in detail in the above-shown method embodiment, and will not be described in detail herein.

2. Some possible implementations

9. Example illustration of terminal equipment

Referring to fig. 12, fig. 12 is a schematic structural diagram of a terminal device according to an embodiment of the present application. Among other things, the terminal device 1200 may include a processor 1210, a memory 1220, and a communication bus for connecting the processor 1210 and the memory 1220.

In some possible implementations, memory 1220 includes, but is not limited to, random access memory (random access memory, RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), or portable read-only memory (compact disc read-only memory, CD-ROM), which memory 1220 is used to store program code executed by terminal device 1200 and transmitted data.

In some possible implementations, the terminal device 1200 also includes a communication interface for receiving and transmitting data.

In some possible implementations, the terminal device 1200 may be the first terminal device described above.

In some possible implementations, the processor 1210 may be one or more Central Processing Units (CPUs), and in the case where the processor 1210 is one Central Processing Unit (CPU), the Central Processing Unit (CPU) may be a single-core Central Processing Unit (CPU) or a multi-core Central Processing Unit (CPU).

In some possible implementations, the processor 1210 may be a baseband chip, a Central Processing Unit (CPU), a general purpose processor, DSP, ASIC, FPGA, or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof.

In particular implementation, processor 1210 in terminal device 1200 is configured to execute computer programs or instructions 1221 stored in memory 1220 to perform the following operations:

And sending first information, wherein the first information is used for updating the historical information of the terminal equipment stored in the first primary and secondary cells in continuous primary and secondary cell condition updating or updating the historical information of the terminal equipment maintained by the primary node in continuous primary and secondary cell condition updating, and the first primary and secondary cells are primary and secondary cells which are accessed or already accessed by the terminal equipment.

It should be noted that, the specific implementation of each operation may be described in the above-illustrated method embodiment, and the terminal device 1200 may be used to execute the above-illustrated method embodiment of the present application, which is not described herein.

10. An illustration of a master node

Referring to fig. 13, fig. 13 is a schematic structural diagram of a master node according to an embodiment of the present application. Wherein master node 1300 includes a processor 1310, a memory 1320, and a communication bus for connecting processor 1310 and memory 1320.

In some possible implementations, memory 1320 includes, but is not limited to, RAM, ROM, EPROM or CD-ROM, which memory 1320 is used to store related instructions and data.

In some possible implementations, master node 1300 also includes a communication interface for receiving and transmitting data.

In some possible implementations, the processor 1310 may be one or more Central Processing Units (CPUs), which in the case where the processor 1310 is one Central Processing Unit (CPU), may be a single-core Central Processing Unit (CPU) or may be a multi-core Central Processing Unit (CPU).

In some possible implementations, the processor 1310 may be a baseband chip, a Central Processing Unit (CPU), a general purpose processor, DSP, ASIC, FPGA, or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof.

In some possible implementations, processor 1310 in master node 1300 is configured to execute computer programs or instructions 1321 stored in memory 1320, performing the following:

It should be noted that, the specific implementation of each operation may be described in the above-illustrated method embodiment, and the master node 1300 may be used for executing the above-described method embodiment of the present application, which is not described herein.

11. Yet another example of a master node

Referring to fig. 14, fig. 14 is a schematic structural diagram of another master node according to an embodiment of the present application. The master node 1400 includes a processor 1410, a memory 1420, and a communication bus for connecting the processor 1410 and the memory 1420.

In some possible implementations, memory 1420 includes, but is not limited to, RAM, ROM, EPROM or CD-ROM, which memory 1420 is used to store related instructions and data.

In some possible implementations, the master node 1400 also includes a communication interface for receiving and transmitting data.

In some possible implementations, the processor 1410 may be one or more Central Processing Units (CPUs), and in the case where the processor 1410 is one Central Processing Unit (CPU), the Central Processing Unit (CPU) may be a single-core Central Processing Unit (CPU) or a multi-core Central Processing Unit (CPU).

In some possible implementations, the processor 1410 may be a baseband chip, a Central Processing Unit (CPU), a general purpose processor, DSP, ASIC, FPGA, or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof.

In some possible implementations, the processor 1410 in the master node 1400 is configured to execute a computer program or instructions 1421 stored in the memory 1420, performing the following operations:

It should be noted that, the specific implementation of each operation may be described in the above-illustrated method embodiment, and the master node 1400 may be used to execute the above-described method embodiment of the present application, which is not described herein.

12. An illustration of a secondary node

Referring to fig. 15, fig. 15 is a schematic structural diagram of an auxiliary node according to an embodiment of the present application. Wherein the secondary node 1500 comprises a processor 1510, a memory 1520, and a communication bus for connecting the processor 1510 and the memory 1520.

In some possible implementations, memory 1520 includes, but is not limited to, RAM, ROM, EPROM or CD-ROM, which memory 1520 is used to store related instructions and data.

In some possible implementations, the secondary node 1500 also includes a communication interface for receiving and transmitting data.

In some possible implementations, the processor 1510 may be one or more Central Processing Units (CPUs), which may be a single-core Central Processing Unit (CPU) or a multi-core Central Processing Unit (CPU) in the case where the processor 1510 is one CPU.

In some possible implementations, the processor 1510 may be a baseband chip, a Central Processing Unit (CPU), a general purpose processor, DSP, ASIC, FPGA, or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof.

In some possible implementations, the processor 1510 in the secondary node 1500 is configured to execute the computer program or instructions 1521 stored in the memory 1520, performing the following:

And receiving first information, wherein the first information is used for updating the history information of the terminal equipment stored in a first primary and secondary cell in continuous primary and secondary cell condition updating, and the first primary and secondary cell is a primary and secondary cell which is accessed or has been accessed by the terminal equipment.

It should be noted that, the specific implementation of each operation may be described in the above-illustrated method embodiment, and the auxiliary node 1500 may be used to execute the above-described method embodiment of the present application, which is not described herein.

13. Yet another example illustration of a secondary node

Referring to fig. 16, fig. 16 is a schematic structural diagram of another auxiliary node according to an embodiment of the present application. Wherein secondary node 1600 includes a processor 1610, a memory 1620, and a communication bus connecting processor 1610, memory 1620.

In some possible implementations, memory 1620 includes, but is not limited to, RAM, ROM, EPROM or CD-ROM, which memory 1620 is configured to store related instructions and data.

In some possible implementations, secondary node 1600 also includes a communication interface for receiving and transmitting data.

In some possible implementations, processor 1610 may be one or more Central Processing Units (CPUs), which in the case where processor 1610 is one Central Processing Unit (CPU), may be a single-core Central Processing Unit (CPU) or a multi-core Central Processing Unit (CPU).

In some possible implementations, the processor 1610 may be a baseband chip, a Central Processing Unit (CPU), a general purpose processor, DSP, ASIC, FPGA, or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof.

In some possible implementations, processor 1610 in secondary node 1600 is configured to execute computer programs or instructions 1621 stored in memory 1620 by performing the following operations:

It should be noted that, the specific implementation of each operation may be described in the above-illustrated method embodiment, and the auxiliary node 1600 may be used to perform the above-described method embodiment of the present application, which is not described herein.

14. Other related exemplary illustrations

In some possible implementations, the above-described method embodiments may be applied to or among terminal devices. That is, the execution body of the above-described method embodiment may be a terminal device, and may be a chip, a chip module, a module, or the like, which is not particularly limited.

In some possible implementations, the above-described method embodiments may be applied to or within a master node. That is, the execution body of the method embodiment may be a master node, and may be a chip, a chip module, a module, or the like, which is not limited in particular.

In some possible implementations, the above-described method embodiments may be applied to or among secondary nodes. That is, the execution body of the method embodiment may be an auxiliary node, and may be a chip, a chip module or a module, which is not limited in particular.

The embodiment of the application also provides a chip which comprises a processor, a memory and a computer program or instructions stored on the memory, wherein the processor executes the computer program or instructions to realize the steps described in the embodiment of the method.

The embodiment of the application also provides a chip module, which comprises a receiving and transmitting assembly and a chip, wherein the chip comprises a processor, a memory and a computer program or instructions stored on the memory, and the processor executes the computer program or instructions to realize the steps described in the embodiment of the method.

The embodiments of the present application also provide a computer-readable storage medium storing a computer program or instructions which, when executed, implement the steps described in the method embodiments above.

Embodiments of the present application also provide a computer program product comprising a computer program or instructions which, when executed, implement the steps described in the method embodiments above.

The embodiment of the application also provides a communication system which comprises the terminal equipment and the network equipment.

For the above embodiments, for simplicity of description, the same is denoted as a series of combinations of actions. It will be appreciated by persons skilled in the art that the application is not limited by the order of acts described, as some steps in embodiments of the application may be performed in other orders or concurrently. In addition, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred embodiments, and that the acts, steps, modules, or units, etc. that are described are not necessarily required by the embodiments of the application.

In the foregoing embodiments, the descriptions of the embodiments of the present application are emphasized, and in part, not described in detail in one embodiment, reference may be made to related descriptions of other embodiments.

The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied in hardware, or may be embodied in software instructions executed by a processor. The software instructions may be comprised of corresponding software modules that may be stored in RAM, flash memory, ROM, EPROM, electrically Erasable EPROM (EEPROM), registers, hard disk, a removable disk, a compact disk read-only (CD-ROM), or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. In addition, the ASIC may be located in a terminal device or a management device. The processor and the storage medium may reside as discrete components in a terminal device or management device.

Those skilled in the art will appreciate that in one or more of the examples described above, the functions described in the embodiments of the present application may be implemented, in whole or in part, in software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, produces a flow or function in accordance with embodiments of the present application, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line (digital subscriber line, DSL)), or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a digital video disc (digital video disc, DVD)), or a semiconductor medium (e.g., a Solid State Drive (SSD)), or the like.

The respective apparatuses and the respective modules/units included in the products described in the above embodiments may be software modules/units, may be hardware modules/units, or may be partly software modules/units, and partly hardware modules/units. For example, for each device or product applied to or integrated on a chip, each module/unit included in the device or product may be implemented in hardware such as a circuit, or at least some modules/units may be implemented in software program, where the software program runs on a processor integrated inside the chip, and the remaining (if any) part of modules/units may be implemented in hardware such as a circuit; for each device and product applied to or integrated in the chip module, each module/unit contained in the device and product can be realized in a hardware manner such as a circuit, different modules/units can be located in the same component (such as a chip, a circuit module and the like) or different components of the chip module, or at least part of the modules/units can be realized in a software program, the software program runs on a processor integrated in the chip module, and the rest (if any) of the modules/units can be realized in a hardware manner such as a circuit; for each device, product, or application to or integrated with the terminal device, each module/unit included in the device may be implemented in hardware such as a circuit, and different modules/units may be located in the same component (e.g., a chip, a circuit module, etc.) or different components in the terminal device, or at least some modules/units may be implemented in a software program, where the software program runs on a processor integrated within the terminal device, and the remaining (if any) some modules/units may be implemented in hardware such as a circuit.

The foregoing detailed description of the embodiments of the present application further illustrates the purposes, technical solutions and advantageous effects of the embodiments of the present application, and it should be understood that the foregoing description is only a specific implementation of the embodiments of the present application, and is not intended to limit the scope of the embodiments of the present application, and any modifications, equivalent substitutions, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application should be included in the scope of the embodiments of the present application.

Claims

1. A communication method, applied to a terminal device, comprising:

2. The method of claim 1, wherein the first information comprises at least one of:

The first access time interval information is used for indicating a time interval between the access time of the first primary and secondary cells and the access time of the primary and secondary cells which are accessed by the terminal equipment in a history manner;

And the history primary and secondary cell identification information is used for indicating the identification of the primary and secondary cells which are accessed by the terminal equipment in history.

3. The method of claim 2, wherein the access time comprises a transmission time of a radio resource control, RRC, reconfiguration complete message or a reception time of the RRC reconfiguration complete message.

4. The method of claim 3, wherein the RRC reconfiguration complete information is in a 2-step random access procedure or a 4-step random access procedure.

5. The method of claim 1, wherein the type of history information comprises at least one of:

Primary and secondary cell identification information, wherein the primary and secondary cell identification information is used for indicating the identification of a primary and secondary cell which is accessed by the terminal equipment and/or accessed in history;

and the residence time information is used for indicating residence time of the terminal equipment in the accessed primary and secondary cells.

6. The method according to claim 5, characterized in that the residence time of the terminal device in the accessed primary and secondary cell comprises the residence time of the terminal device in the source primary and secondary cell and/or the residence time of the terminal device in the historically accessed primary and secondary cell.

7. The method of claim 1, wherein the first information is carried by one of an RRC reconfiguration complete message, message a, and side information of the terminal device.

8. The method according to claim 1, wherein the first information is sent after the terminal device finds that the first primary and secondary cell satisfies an update trigger condition from a plurality of candidate primary and secondary cells; or alternatively

Is sent after the terminal equipment sends indication information to a main node; or alternatively

The indication information is sent when the terminal equipment sends the indication information to a main node, and the indication information is used for indicating that the terminal equipment is accessing to the first primary and secondary cells.

9. A method of communication, applied to a master node, comprising:

10. The method of claim 9, wherein the first information comprises at least one of:

11. The method of claim 10, wherein the access time comprises a transmission time of a radio resource control, RRC, reconfiguration complete message or a reception time of the RRC reconfiguration complete message.

12. The method of claim 11, wherein the RRC reconfiguration complete message is in a 2-step random access procedure or a 4-step random access procedure.

13. The method of claim 9, wherein the type of history information comprises at least one of:

14. The method according to claim 13, characterized in that the residence time of the terminal device in the accessed primary and secondary cell comprises the residence time of the terminal device in the source primary and secondary cell and/or the residence time of the terminal device in the historically accessed primary and secondary cell.

15. The method of claim 9, wherein the first information is carried by a secondary node modification request message.

16. The method according to claim 9, wherein the first information is sent after the terminal device finds that the first primary and secondary cell satisfies an update trigger condition from a plurality of candidate primary and secondary cells; or alternatively

Is sent after the primary node receives indication information from the terminal device, where the indication information is used to indicate that the terminal device is accessing the first primary and secondary cells.

17. A method of communication, applied to a master node, comprising:

18. The method of claim 17, wherein the first information comprises at least one of:

19. The method of claim 18, wherein the access time comprises a time of transmission of a radio resource control, RRC, reconfiguration complete message or a time of receipt of the RRC reconfiguration complete message.

20. The method of claim 19, wherein the RRC reconfiguration complete information is in a 2-step random access procedure or a 4-step random access procedure.

21. The method of claim 17, wherein the type of history information comprises at least one of:

22. The method according to claim 21, characterized in that the residence time of the terminal device in the accessed primary and secondary cell comprises the residence time of the terminal device in the source primary and secondary cell and/or the residence time of the terminal device in the historically accessed primary and secondary cell.

23. The method of claim 17, wherein the first information is carried by one of an RRC reconfiguration complete message, and side information of the terminal device.

24. The method according to claim 17, wherein the first information is received after the terminal device finds that the first primary and secondary cell satisfies an update trigger condition from a plurality of candidate primary and secondary cells; or alternatively

Is received after the master node receives the indication information from the terminal device; or alternatively

Is received when the master node receives the indication information from the terminal device, where the indication information is used to indicate that the terminal device is accessing the first primary and secondary cells.

25. A communication method, applied to a secondary node, the secondary node policing a first primary and secondary cell, comprising:

26. The method of claim 25, wherein the first information comprises at least one of:

27. The method of claim 26, wherein the access time comprises a time of transmission of a radio resource control, RRC, reconfiguration complete message or a time of receipt of the RRC reconfiguration complete message.

28. The method of claim 27, wherein the RRC reconfiguration complete information is in a 2-step random access procedure or a 4-step random access procedure.

29. The method of claim 25, wherein the type of history information comprises at least one of:

30. The method according to claim 29, wherein the residence time of the terminal device in the accessed primary and secondary cell comprises the residence time of the terminal device in the source primary and secondary cell and/or the residence time of the terminal device in the historically accessed primary and secondary cell.

31. The method of claim 30, wherein the residence time of the terminal device in the source primary and secondary cells is updated based on a time interval between a time when the primary and secondary cell condition update request is received by the first primary and secondary cell and an access time of a primary and secondary cell to which the terminal device first accesses after the source primary and secondary cells.

32. The method according to claim 30, wherein the residence time of the terminal device in the primary and secondary cells that have been historically accessed is updated according to the time interval between the access times of two neighboring primary and secondary cells in the primary and secondary cells that have been historically accessed by the terminal device;

33. The method of claim 25, wherein the first information is carried by one of an RRC reconfiguration complete message, message a, and side information of the terminal device.

34. The method according to claim 25, wherein the first information is received after the terminal device finds that the first primary and secondary cell satisfies an update trigger condition from a plurality of candidate primary and secondary cells; or alternatively

Is received after the terminal device sends indication information to the master node; or alternatively

The indication information is received when the terminal equipment sends the indication information to a main node, wherein the indication information is used for indicating that the terminal equipment is accessing to the first primary and secondary cells.

35. A communication method, applied to a secondary node, the secondary node policing a first primary and secondary cell, comprising:

36. The method of claim 35, wherein the first information comprises at least one of:

37. The method of claim 36, wherein the access time comprises a time of transmission of a radio resource control, RRC, reconfiguration complete message or a time of receipt of the RRC reconfiguration complete message.

38. The method of claim 37, wherein the RRC reconfiguration complete information is in a 2-step random access procedure or a 4-step random access procedure.

39. The method of claim 35, wherein the type of history information comprises at least one of:

40. A method as defined in claim 39, wherein the residence time of the terminal device in the accessed primary and secondary cells comprises the residence time of the terminal device in the source primary and secondary cells and/or the residence time of the terminal device in the historically accessed primary and secondary cells.

41. The method of claim 35, wherein the first information is carried by a secondary node modification request message.

42. A communication apparatus, characterized by being applied to a terminal device, comprising:

43. A communication device, for application to a master node, comprising:

44. A communication device, for application to a master node, comprising:

45. A communication device, applied to an auxiliary node, where the auxiliary node corresponds to a first primary and secondary cell, comprising:

46. A communication device, applied to an auxiliary node, where the auxiliary node corresponds to a first primary and secondary cell, comprising:

47. A terminal device comprising a processor, a memory and a computer program or instructions stored on the memory, characterized in that the processor executes the computer program or instructions to carry out the steps of the method according to any one of claims 1-8.

48. A master node comprising a processor, a memory and a computer program or instructions stored on the memory, wherein the processor executes the computer program or instructions to implement the steps of the method of any one of claims 9-16 or 17-24.

49. A secondary node comprising a processor, a memory and a computer program or instructions stored on the memory, wherein the processor executes the computer program or instructions to carry out the steps of the method of any one of claims 25-34 or 35-41.

50. A chip comprising a processor and a communication interface, wherein the processor performs the steps of the method of any one of claims 1-8, 9-16, 17-24, 25-34, or 35-41.

51. A computer readable storage medium, characterized in that it stores a computer program or instructions which, when executed, implement the steps of the method of any one of claims 1-8, 9-16, 17-24, 25-34 or 35-41.