Node device and method performed thereby

Abstract

A node device and a method executed thereon are proposed. A method executed by a first node in a communication system is proposed, the method comprising: receiving a third message from a second node, the third message containing first configuration information of a first target cell or a first candidate cell required by the first node for cell handover or cell change; receiving a fourth message from the second node, the fourth message including indication information indicating candidate configuration, first information related to timing advance required by the first node to access the first target cell or the first candidate cell, and at least one of the following: second configuration information for updating the first configuration information, and indication information for updating the configuration of the serving cell of the first node.

Description

Technical Field

[0001] This disclosure relates to the field of communications, and more specifically, to methods performed by a first node, methods performed by a second node, methods performed by a third node, and the first node, the second node, and the third node. Background Technology

[0002] To meet the increased demand for wireless data communication services since the deployment of 4G communication systems, efforts have been made to develop improved 5G or near-5G communication systems. Therefore, 5G or near-5G communication systems are also referred to as "super 4G networks" or "post-LTE systems".

[0003] Wireless communication is one of the most successful innovations in modern history. Recently, the number of subscribers to wireless communication services surpassed 5 billion and continues to grow rapidly. The demand for wireless data services is growing rapidly due to the increasing prevalence of smartphones and other mobile data devices (such as tablets, laptops, netbooks, e-book readers, and machine-type devices) among consumers and businesses. To meet the rapid growth of mobile data services and support new applications and deployments, improving the efficiency and coverage of wireless interfaces and reducing communication interruptions and handover latency during user device mobility are crucial. Summary of the Invention

[0004] According to one aspect of this disclosure, a method is provided to be performed by a first node in a communication system, the method comprising: receiving a third message from a second node, the third message containing first configuration information of a first target cell or a first candidate cell required by the first node when performing cell handover or cell change; receiving a fourth message from the second node, the fourth message including indication information indicating candidate configuration, first information related to timing advance required by the first node to access the first target cell or the first candidate cell, and at least one of the following: second configuration information for updating the first configuration information, and indication information for updating the configuration of the serving cell of the first node.

[0005] According to the method performed by a first node in a communication system provided in this disclosure, the first information associated with timing advance includes at least one of the following: first timing advance information used by the first node when transmitting an uplink signal, a seventh timing advance validity time for indicating the validity time of the first timing advance information, indication information for indicating the timing advance group associated with the first timing advance information, identification information for indicating the timing advance group associated with the first timing advance information, and identification information for indicating the transmission control indication status associated with the first timing advance information.

[0006] According to the method performed by a first node in a communication system provided in this disclosure, the second configuration information for updating the first configuration information includes at least one of the following: first identification information indicating the configuration to be applied by the first node; second information indicating the activation and deactivation status of at least one cell; third information indicating the configuration of uplink control information of at least one cell when serving the first node; fourth information indicating the configuration of uplink resources of at least one cell when serving the first node; and fifth information indicating the configuration of data transmission of at least one cell when serving the first node. The indication information for updating the configuration of the serving cell of the first node includes at least one of the following: sixth information indicating the activation and deactivation status of at least one of the serving cells; seventh information indicating the configuration of uplink control information of at least one of the serving cells; eighth information indicating the configuration of uplink resources of at least one of the serving cells; and ninth information indicating the configuration of data transmission of at least one of the serving cells.

[0007] According to the method performed by a first node in a communication system provided in this disclosure, the indication information indicating a candidate configuration includes at least one of the following: identification information of the candidate configuration, identification information of a first cell, and indication information of the type of the candidate configuration.

[0008] According to the method performed by a first node in a communication system provided in this disclosure, the method further includes: starting a timer associated with the timing advance group to which the first cell, identified by the identification information of the first cell, belongs; receiving a message from the second node indicating a switch to a second cell different from the first cell or knowing that the conditions for switching to the second cell have been met; and, if the timer is still running and the second cell belongs to the timing advance group to which the first cell belongs or the timing advance group to which the second cell belongs is the same as the timing advance group to which the first cell belongs, accessing the second cell through a process without random access based on the first timing advance information.

[0009] According to the method provided in this disclosure, which is executed by a first node in a communication system, the fourth message can be used to trigger the first node to perform a cell change or cell handover.

[0010] According to the method performed by a first node in a communication system provided in this disclosure, the method further includes: the third message is sent by the second node after receiving a second message from the third node containing configuration information of a second target cell or a second candidate cell. The second message includes at least one of the following: information related to the cell configured by the third node for the first node; information related to the data transmission configured by the third node for the first node; information related to the candidate configuration prepared by the third node for the first node; information related to the timing advance group to which the cell configured by the third node for the first node belongs; and information related to the configuration that the first node can change during cell change or cell handover.

[0011] According to the method performed by a first node in a communication system provided in this disclosure, the method further includes: the fourth message is sent by the second node after receiving a sixth message sent by the third node for updating the configuration information of the first node, the sixth message including at least one of the following: identification information of a third cell, information related to the timing advance of the third cell, information for updating the activation status of at least one (candidate) cell configured by the third node, information for updating the uplink control information configuration of the at least one (candidate) cell configured by the third node, information for updating the uplink resource configuration of the at least one (candidate) cell configured by the third node, and information for updating the data transmission configuration of the at least one (candidate) cell configured by the third node.

[0012] According to another aspect of this disclosure, a method executed by a second node in a communication system is provided, the method comprising: sending a third message to a first node, the third message containing first configuration information of a first target cell or a first candidate cell required by the first node when performing cell handover or cell change; sending a fourth message to the first node, the fourth message including indication information indicating candidate configuration, first information related to timing advance required by the first node to access the first target cell or the first candidate cell, and at least one of the following: second configuration information for updating the first configuration information, and indication information for updating the configuration of the serving cell of the first node.

[0013] According to the method performed by a second node in a communication system provided in this disclosure, the first information associated with timing advance includes at least one of the following: first timing advance information used by the first node when transmitting an uplink signal, a seventh timing advance validity time for indicating the validity time of the first timing advance information, indication information for indicating the timing advance group associated with the first timing advance information, identification information for indicating the timing advance group associated with the first timing advance information, and identification information for indicating the transmission control indication status associated with the first timing advance information.

[0014] According to the method performed by a second node in a communication system provided in this disclosure, the second configuration information for updating the first configuration information includes at least one of the following: first identification information indicating the configuration to be applied by the first node; second information indicating the activation and deactivation status of at least one cell; third information indicating the configuration of uplink control information of at least one cell when serving the first node; fourth information indicating the configuration of uplink resources of at least one cell when serving the first node; and fifth information indicating the configuration of data transmission of at least one cell when serving the first node; and the indication information for updating the configuration of the serving cell of the first node includes at least one of the following: sixth information indicating the activation and deactivation status of at least one of the serving cells; seventh information indicating the configuration of uplink control information of at least one of the serving cells; eighth information indicating the configuration of uplink resources of at least one of the serving cells; and ninth information indicating the configuration of data transmission of at least one of the serving cells.

[0015] According to the method performed by a second node in a communication system provided in this disclosure, the indication information indicating the candidate configuration includes at least one of the following: identification information of the candidate configuration, identification information of a first cell, and indication information of the type of the candidate configuration.

[0016] According to the method performed by a second node in a communication system provided in this disclosure, the fourth message can be used to trigger the first node to perform a cell change or cell handover.

[0017] According to the method performed by a second node in a communication system provided in this disclosure, the method further includes receiving a second message from a third node containing configuration information of a second target cell or a second candidate cell. The second message includes at least one of the following: information related to a cell configured by the third node for the first node; information related to data transmission configured by the third node for the first node; information related to candidate configurations prepared by the third node for the first node; information related to the timing advance group to which the cell configured by the third node for the first node belongs; and information related to configurations that the first node can change during cell change or cell handover.

[0018] According to the method performed by a second node in a communication system provided in this disclosure, the method further includes receiving a sixth message from the third node for updating the configuration information of the first node. The sixth message includes at least one of the following: identification information of a third cell; information related to the timing advance of the third cell; information for updating the activation status of at least one (candidate) cell configured by the third node; information for updating the configuration of uplink control information of the at least one (candidate) cell configured by the third node; information for updating the configuration of uplink resources of the at least one (candidate) cell configured by the third node; and information for updating the configuration of data transmission of the at least one (candidate) cell configured by the third node.

[0019] According to another aspect of this disclosure, a method performed by a third node in a communication system is provided, the method comprising: sending a second message to a second node containing configuration information of a second target cell or a second candidate cell; sending a sixth message to the second node for updating configuration information of a first node; the second message comprising at least one of the following: information relating to a cell configured by the third node for the first node, information relating to data transmission configured by the third node for the first node, information relating to a candidate configuration prepared by the third node for the first node, information relating to the timing advance group to which the cell configured by the third node for the first node belongs, and information relating to configurations that the first node can change during cell change or cell handover.

[0020] According to the method performed by a third node in a communication system provided in this disclosure, the sixth message includes at least one of the following: identification information of a third cell, information related to the timing advance of the third cell, information for updating the activation status of at least one (candidate) cell configured by the third node, information for updating the configuration of uplink control information of the at least one (candidate) cell configured by the third node, information for updating the configuration of uplink resources of the at least one (candidate) cell configured by the third node, and information for updating the configuration of data transmission of the at least one (candidate) cell configured by the third node.

[0021] According to another aspect of this disclosure, a node device is provided, the node device comprising:

[0022] A transceiver is configured to transmit and receive signals to an external source; and a controller is configured to control the transceiver to perform any of the methods described by the first, second, or third node described above. Attached Figure Description

[0023] Figure 1 This is an exemplary system architecture for System Architecture Evolution (SAE).

[0024] Figure 2 This is an exemplary system architecture based on various embodiments of the present disclosure.

[0025] Figure 3 This is a schematic diagram of the first example process according to this disclosure.

[0026] Figure 4 This is a schematic diagram of the second example process according to this disclosure.

[0027] Figure 5 This is a block diagram illustrating the structure of a node according to an embodiment of the present disclosure. Detailed Implementation

[0028] The following description, with reference to the accompanying drawings, is provided to aid in a thorough understanding of the various embodiments of this disclosure as defined by the claims and their equivalents. This description includes various specific details to aid understanding but should be considered exemplary only. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of this disclosure. Furthermore, for clarity and brevity, descriptions of well-known functions and structures may be omitted.

[0029] The terms and wording used in the following description and claims are not limited to their dictionary meanings, but are merely used by the inventors to enable a clear and consistent understanding of this disclosure. Therefore, it will be apparent to those skilled in the art that the following description of various embodiments of this disclosure is for illustrative purposes only and not for limiting the purpose of this disclosure as defined in the appended claims and their equivalents.

[0030] It should be understood that the singular forms of “one,” “an,” and “the” include plural references unless the context clearly indicates otherwise. Thus, for example, the reference to “component surface” includes one or more such surfaces.

[0031] The terms “comprising” or “may include” refer to the presence of a corresponding disclosed function, operation, or component that may be used in the various embodiments of this disclosure, rather than limiting the presence of one or more additional functions, operations, or features. Furthermore, the terms “comprising” or “having” may be interpreted as indicating certain characteristics, numbers, steps, operations, constituent components, components, or combinations thereof, but should not be construed as excluding the possibility of the presence of one or more other characteristics, numbers, steps, operations, constituent components, components, or combinations thereof.

[0032] The term "or" as used in the various embodiments of this disclosure includes any of the listed terms and all combinations thereof. For example, "A or B" may include A, may include B, or may include both A and B.

[0033] Unless otherwise defined, all terms used in this disclosure (including technical or scientific terms) have the same meaning as understood by one of those skilled in the art as described herein. Common terms as defined in dictionaries are to be interpreted as having a meaning consistent with the context in the relevant technical field and should not be interpreted ideally or overly formally unless expressly defined in this disclosure.

[0034] The following discussion Figures 1 to 5 The various embodiments used to describe the principles of this disclosure in this patent document are for illustrative purposes only and should not be construed as limiting the scope of this disclosure in any way. Those skilled in the art will understand that the principles of this disclosure can be implemented in any suitably arranged system or device.

[0035] Figure 1This is an exemplary system architecture 100 of System Architecture Evolution (SAE). User Equipment (UE) 101 is a terminal device used to receive data. Evolved Universal Terrestrial Radio Access Network (E-UTRAN) 102 is a radio access network, including macro base stations (eNodeB / NodeB) that provide the UE with an interface to access the radio network. Mobility Management Entity (MME) 103 is responsible for managing the UE's mobility context, session context, and security information. Serving Gateway (SGW) 104 primarily provides user plane functions; MME 103 and SGW 104 may reside in the same physical entity. Packet Data Network Gateway (PGW) 105 is responsible for functions such as charging and lawful interception, and may also reside in the same physical entity as SGW 104. Policy and Charging Rules Function Entity (PCRF) 106 provides Quality of Service (QoS) policies and charging criteria. Universal Packet Radio Service Support Node (SGSN) 108 is a network node device in the Universal Mobile Telecommunications System (UMTS) that provides routing for data transmission. The Home Subscriber Server (HSS) 109 is the UE's home subsystem, responsible for protecting user information including the UE's current location, the address of the serving node, user security information, and the UE's packet data context.

[0036] Figure 2 This is an exemplary system architecture 200 according to various embodiments of the present disclosure. Other embodiments of the system architecture 200 can be used without departing from the scope of the present disclosure.

[0037] User Equipment (UE) 201 is the terminal equipment used to receive data. Next-Generation Radio Access Network (NG-RAN) 202 is the radio access network, which includes base stations (gNBs or eNBs connected to the 5G core network 5GC; eNBs connected to the 5GC are also called ng-gNBs) that provide the UE with an access radio network interface. Access Control and Mobility Management Function Entity (AMF) 203 is responsible for managing the UE's mobility context and security information. User Plane Function Entity (UPF) 204 primarily provides user plane functions. Session Management Function Entity (SMF) 205 is responsible for session management. Data Network (DN) 206 includes services such as operator services, internet access, and third-party services.

[0038] The text and accompanying drawings are provided by way of example only to aid in understanding this disclosure. They should not be construed as limiting the scope of this disclosure in any way. Although certain embodiments and examples have been provided, it will be apparent to those skilled in the art, based on the content disclosed herein, that changes may be made to the illustrated embodiments and examples without departing from the scope of this disclosure.

[0039] Before introducing the specific content, some assumptions and definitions of this invention are given below.

[0040] ■ The message name in this invention is just an example; other message names can also be used.

[0041] ■The terms "first," "second," etc., included in the message names of this invention are merely examples of messages and do not represent the execution order.

[0042] ■Detailed descriptions of steps unrelated to this invention have been omitted in this invention.

[0043] ■ In this invention, the steps in each process can be executed in combination or individually. The execution steps of each process are merely examples, and other possible execution sequences are not excluded.

[0044] ■ In this invention, the base station can be a 6G base station, a 5G base station (such as gNB, ng-eNB), a 4G base station (such as eNB), or other types of access nodes.

[0045] ■ In this invention, when the cell accessed by a user equipment changes from one cell to another, this behavior can be referred to as handover or cell switch. In the following description, handover and cell switch have the same meaning.

[0046] ■In this invention, user, user equipment, user terminal, and user terminal equipment are equivalent.

[0047] ■The method involved in this invention can be used to reduce latency and interruptions.

[0048] The nodes involved in this invention:

[0049] ■ First node: User equipment, for example, the device could be a mobile phone or a relay node.

[0050] ■ Second node: base station, or centralized unit of base station, or control plane portion of centralized unit of base station. In one example, the base station may be the source node (or source base station) for user equipment handover. In another example, the base station may be the master node (or master base station) in dual connectivity.

[0051] ■ Third Node: A base station, or a centralized unit of a base station, or the control plane portion of a centralized unit of a base station, which is distinct from the second node, or a distributed unit of a base station. In one example, the base station may be the target base station (or target node) for user equipment handover, or a candidate base station (or candidate node) for handover; in another example, the base station may be a secondary base station (or secondary node) in dual connectivity.

[0052] The cell served by the aforementioned second / third nodes can be a special cell (SpCell). In one example, this special cell can be a special cell of a master cell group (SpCell of a master cell group) or a primary cell (PCell). In another example, this special cell can be a special cell of a secondary cell group or a primary-secondary cell group (PSCell). The cell served by the aforementioned second / third nodes can also be a secondary cell (SCell). When the cell served is a special cell of a user equipment (UE), this special cell can be the source cell (source master cell, or source master-secondary cell) of the UE (first node), the target cell (target master cell, or target master-secondary cell) of the UE (first node), or a candidate cell (candidate master cell, or candidate master-secondary cell) for handover of the UE (first node).

[0053] The base stations involved in the aforementioned second / third nodes can be, for example, one of the following types (other types that can be used for user terminal access are also excluded):

[0054] ■LTE base station;

[0055] ■5G base station;

[0056] ■6G base station;

[0057] ■NTN base station;

[0058] ■HAPS base station;

[0059] ■Drone base station;

[0060] ■WIFI access point.

[0061] The numbers of the steps below do not indicate the order in which they are performed. The steps below can be performed individually or in combination.

[0062] In mobile networks, user equipment (UEs) handover between different cells. To improve UE handover performance, the industry has proposed various handover mechanisms, such as Layer 3 handover, L1 / L2-triggered mobility (LTM) mechanisms, conditional handover (CHO), conditional LTM (CLTM), consecutive LTM, consecutive handover, consecutive conditional handover (CHO), and consecutive conditional LTM (CLTM). When UEs are configured with dual connectivity, mechanisms such as primary cell addition / change (PSCell addition change), secondary cell addition / change (Subsequent PSCell addition change), conditional secondary cell addition / change (CPAC), and consecutive conditional secondary cell addition / change (Subsequent CPAC) have also been proposed. These mechanisms can reduce communication interruptions or handover latency during user equipment handover and improve handover robustness. However, these handover mechanisms lead to increased configuration signaling overhead, redundant configuration of user equipment, redundant reservation of network resources, and redundant operations by user equipment (such as repeated acquisition of uplink timing advance information and repeated uplink synchronization). All of these affect the resource efficiency and signaling overhead of the network in supporting user equipment mobility. Therefore, how to improve the efficiency of network-side and user-side mobility support is an urgent problem to be solved.

[0063] In the existing mechanism, network nodes prepare multiple candidate cells for user equipment (UEs) and pre-prepare and send the UEs the configurations for accessing these candidate cells. This allows UEs to utilize these pre-prepared configurations for cell handover or cell change when a handover occurs. The advantage of this mechanism is that it accelerates the cell change or handover process for UEs. However, this mechanism requires the network side to prepare resources in advance for UEs; if the UE does not switch to one of the prepared candidate cells, these prepared resources are wasted. Furthermore, this mechanism can lead to many redundant configurations (e.g., a cell may be configured multiple times, such as as a candidate primary cell, a serving secondary cell, or a secondary cell after handover), increasing configuration signaling overhead. In addition, UEs may perform many repetitive operations, such as repeatedly obtaining access cell advance information.

[0064] Embodiments of this disclosure provide a method executed by a first node in a communication system, the method comprising: receiving a third message from a second node, the third message containing first configuration information of a first target cell or a first candidate cell required by the first node when performing cell handover or cell change; receiving a fourth message from the second node, the fourth message including indication information indicating candidate configuration, first information related to timing advance required by the first node to access the first target cell or the first candidate cell, and at least one of the following: second configuration information for updating the first configuration information, and indication information for updating the configuration of the serving cell of the first node.

[0065] Embodiments of this disclosure provide a method executed by a second node in a communication system, the method comprising: sending a third message to a first node, the third message containing first configuration information of a first target cell or a first candidate cell required by the first node for cell handover or cell change; sending a fourth message to the first node, the fourth message including indication information indicating candidate configuration, first information related to timing advance required by the first node for accessing the first target cell or the first candidate cell, and at least one of the following: second configuration information for updating the first configuration information, and indication information for updating the configuration of the serving cell of the first node.

[0066] Embodiments of this disclosure provide a method executed by a third node in a communication system, the method comprising: sending a second message to a second node containing configuration information of a second target cell or a second candidate cell; sending a sixth message to the second node for updating configuration information of a first node; the second message comprising at least one of the following: information relating to a cell configured by the third node for the first node, information relating to data transmission configured by the third node for the first node, information relating to candidate configurations prepared by the third node for the first node, information relating to the timing advance group to which the cell configured by the third node for the first node belongs, and information relating to configurations that the first node can change during cell change or cell handover.

[0067] The above methods can reduce signaling overhead, improve resource utilization efficiency, simplify user equipment processing, and reduce communication interruption time or handover latency during handover.

[0068] This invention includes the following processes, such as... Figure 3 As shown:

[0069] Step 1-1: The second node (e.g., source node, source master node, master node, auxiliary node, centralized unit of the node) sends a first request message (e.g., it can also be called the first message or other message names; this invention does not impose any restrictions on the message name) to the third node (target / candidate node, target / candidate master node, auxiliary node, master node, distributed unit of the node). This message is used to request configuration of the cell of the first node (user terminal). In one example, the cell can be the target cell for the first node's handover (e.g., the target cell for Layer 3 handover, the master cell of the auxiliary cell group, the master cell of the master cell group), and this target cell is the cell served by the third node. In another example, the cell can be a candidate cell (e.g., the candidate cell for handover, the candidate cell for LTM), and this candidate cell is the cell served by the third node. After receiving the message, the third node generates the relevant configuration of the target cell or candidate cell and sends it to the second node in Step 1-2 below, thereby allowing the second node to configure the user equipment (first node). An example of this message is a Handover Request message; another example is a Secondarynode addition / modification request message; yet another example is a message specifically for candidate or target cell preparation, such as a Mobility preparation request message. This message includes at least one of the following:

[0070] ■ Candidate Configuration Count Information: This information indicates the number of candidate configurations prepared by the third node. After receiving this information, the third node will not prepare more than the number indicated by this information. The beneficial effect of this information is that it controls the number of candidate configurations assigned to user equipment, reducing the signaling overhead of configuring user equipment and the resources required for user equipment to store these candidate configurations. In one example, the candidate configuration may be a configuration corresponding to a target cell; in another example, the candidate configuration may be a configuration corresponding to a candidate cell. The target cell or candidate cell may be a primary cell of a primary cell group or a primary cell of a secondary cell group.

[0071] ■ First request information related to the cell, which can be the target cell for handover, a candidate cell for handover, or a secondary cell to be configured after the user equipment (UE) hands over. Upon receiving this information, the third node determines the cell to be configured for the UE based on this information. The beneficial effect of this information is to configure a suitable cell for the UE, increasing the probability of successful handover or cell change.

[0072] For a given cell, this information includes at least one of the following:

[0073] ■First Community Identification Information

[0074] ■ First cell configuration request indication information, which indicates the purpose of requesting the third node to configure the cell, and the purpose indicated by the information can be at least one of the following:

[0075] ◆Indicates that the cell mentioned is a primary cell in a primary cell group, such as the target cell for handover (e.g., Layer 3 handover), or a candidate cell for handover.

[0076] ◆This indicates that the cell in question is the primary cell of a secondary cell group, such as the primary cell of a target secondary cell group or the primary cell of a candidate secondary cell group.

[0077] ◆Indicates that the cell is a secondary cell, such as a secondary cell in a primary cell group, or a secondary cell in a secondary cell group. ◆Indicates that the cell can be a cell in a secondary cell group used for dual connectivity (or multiple connectivity).

[0078] ◆Indicates that the cell is used for handover, or for LTM, or for conditional handover (CHO), or for conditional LTM (CLTM), or for subsequent handover, or for subsequent conditional handover (CHO), or for subsequent conditional LTM (CLTM).

[0079] ◆Indicates whether the cell is used for dual connectivity (or multiple connectivity), or for adding or changing the primary cell of a secondary cell group (PSCell addition change), or for adding or changing the primary cell of a consecutive secondary cell group (Subsequent PSCell addition change), or for adding or changing the primary cell of a conditional secondary cell group (Conditional PSCell Addition Change, CPAC), or for adding or changing a cell of a consecutive conditional secondary cell group (Subsequent CPAC).

[0080] ■ First measurement result information, which indicates the measurement result of the cell. An example of this measurement result is Reference Signal Receiving Power (RSRP), Reference Signal Receiving Quality (RSRQ), or Signal to Interference plus Noise Ratio. In one example, this measurement result information can be a Layer 3 measurement result; in another example, it can be a Layer 1 measurement result. After receiving this information, the third node can determine whether the cell can become the target cell, candidate cell, primary cell of a target secondary cell group, primary cell of a candidate secondary cell group, or secondary cell of a secondary cell group for the user equipment.

[0081] ■ First request information related to data, wherein the data is data transmitted by the user equipment, this information indicates information requesting the third node to accept the data, that is, after the user equipment accesses the cell of the third node, the second node requests the third node to provide resources for the transmission of the data, and this information includes at least one of the following:

[0082] ■ Identification information for primary data, such as the identification information for Packet / Protocol Data Unit Sessions (PDU sessions), Quality of Service (QoS) flows, Radio Bearers (RBs), Data Radio Bearers (DRBs), Signaling Radio Bearers (SRBs), and Internet Protocol (IP) flows.

[0083] ■ First data configuration request indication information, which indicates the purpose of requesting the third node to configure the data transmission. Based on this information, the third node can know the data that the user equipment needs to transmit at the third node. Combined with other information in the aforementioned "first request information related to data," the third node can know which data transmissions are performed when the user equipment is in independent networking and which data transmissions are performed when the user equipment is in dual-connection (or multi-connection). The beneficial effect of this information is that the third node can configure appropriate resources according to the purpose of data transmission, thereby improving the efficiency of resource utilization. The purpose indicated by this information can be at least one of the following:

[0084] ◆This indicates that the data transmission occurs during standalone (SA) networking, specifically when a user equipment (UE) accesses a cell of a third node in a SA configuration. In one example, this information indicates that the data transmission occurred after the UE switched to the cell served by the third node.

[0085] ◆This indicates that data transmission occurs during dual-connectivity (or multi-connectivity) scenarios, specifically when a user equipment (UE) accesses the network in a dual-connectivity (or multi-connectivity) manner within the cell of a third node. In one example, this information indicates that the cell of the third node is a cell in the secondary cell group serving the UE, and the data transmission occurs at the third node when the third node is used as a secondary node serving the UE.

[0086] ■ Information on the Quality of Service (QoS) parameters of the data, indicating the QoS parameters that need to be met when transmitting the data. After receiving this information, the third node will determine the resources to serve the data based on this information.

[0087] ■ Data forwarding address request information. This information indicates that the second node requests the third node to provide address information for forwarding the data. After receiving this information, the third node will decide whether to provide the forwarding address information to the second node. If it decides to provide it to the second node, it will provide the forwarding address to the second node in subsequent steps (such as steps 1-2).

[0088] ■ First data configuration information, which indicates the configuration information used by the second node when serving the data. Upon receiving this information, the third node can refer to it to generate its own configuration information for serving the data. In one example, after receiving this information, the third node needs to use the same configuration to serve the data, thus reducing the need for configuration updates to user devices. In another example, after receiving this information, the third node will refer to it to generate a new configuration for serving the data. This information includes at least one of the following configuration information:

[0089] ◆Configuration information for the Packet Data Convergence Protocol (PDCP) layer

[0090] ◆Configuration information for the Radio Link Control (RLC) protocol layer

[0091] ◆ Configuration information for the logical channel, which includes information about the cell serving the logical channel.

[0092] Steps 1-2: The third node sends a first response message (e.g., also called a second message or other message name; this invention does not limit the message name) to the second node. This message provides configuration information for the target cell or candidate cell. This configuration information can be used to configure the first node to perform cell changes or handovers (such as Layer 3 handover, LTM, CLTM, CHO, CPAC, Subsequent LTM, Subsequent CPAC, etc.). One example of this message is a Handover Request Acknowledge message, and another example is a Secondary node addition / modification request acknowledge message. Another example of this message is a message specifically for candidate cell or target cell preparation, such as a Mobility preparation response message. This message may contain one or more candidate configurations, each related to a target cell or candidate cell, and may contain configuration information for one or more cells, or configuration information for one or more bearers. After receiving this information, the second node sends it to the first node through steps 1-3 below. This message includes at least one of the following:

[0093] ■ First response information related to the cell, which indicates information about the cell configured by the third node for the user equipment. In one example, the cell is a cell accepted by the third node. The cell included in this information includes at least one of the following types of cells: target cell or candidate cell for handover or cell change (e.g., primary cell of primary cell group, secondary cell of secondary cell group), secondary cell (e.g., secondary cell of primary cell group, secondary cell of secondary cell group), etc. In one example, the information includes all cells prepared by the third node, including at least one target cell or candidate cell for handover or cell change (e.g., primary cell of a primary cell group, secondary cell of a secondary cell group), and related secondary cells; in another example, the information includes only one target cell or candidate cell for handover or cell change (e.g., primary cell of a primary cell group, secondary cell of a secondary cell group); in yet another example, the information includes the minimum set of cells required for user equipment to perform cell handover or cell change (one principle for defining the minimum set of cells here is to ensure that user equipment can quickly perform necessary data transmission after cell handover or change, such as quickly performing signaling transmission, such as signaling transmission carried on SRB1, or quickly performing some necessary data transmission, such as necessary SRB-borne signaling and necessary DRB-borne data, such as specific SRBs and DRBs, etc.). This cell set includes one or more primary cells as target cells or candidate cells, and optionally, the set may also include some secondary cells. This information may contain configuration information for one or more cells. For a single cell, this information includes at least one of the following:

[0094] ■ Signage information for the second residential area;

[0095] ■ Indication information for the first cell type, which indicates the type of cell identified by the above-mentioned "identification information of the second cell". The type indicated by this information can be at least one of the following types: primary cell, secondary cell, primary cell and secondary cell;

[0096] ■ Indication information of the first associated cell, which indicates at least one cell associated with the cell identified by the "identification information of the second cell". In one example, if the cell identified by the "identification information of the second cell" is a primary cell, then the information indicates the information (such as identification information) of at least one associated secondary cell. In another example, if the cell identified by the "identification information of the second cell" is a secondary cell, then the information indicates the information (such as identification information) of the associated primary cell. In yet another example, if the cell identified by the "identification information of the second cell" is both a primary cell and a secondary cell, then the information indicates the information (such as identification information) of at least one associated secondary cell when the cell identified by the "identification information of the second cell" is a primary cell. In yet another example, if the cell identified by the "identification information of the second cell" is both a primary cell and a secondary cell, then the information indicates the information (such as identification information) of the primary cell when the cell identified by the "identification information of the second cell" is a secondary cell.

[0097] ■ First cell configuration response indication information, which indicates the purpose of the cell configured by the third node. In one example, this information is determined by the third node based on the purpose indicated in the "first cell configuration request indication information" included in the first request message above. Further, if the third node is able to accept the cell, this information may indicate the purpose for which the third node will serve the user equipment; in another example, this information may be generated by the third node, indicating the purpose of the cell it accepts. The purpose indicated by this information may be at least one of the following:

[0098] ◆Indicates that the cell mentioned is a primary cell in a primary cell group, such as the target cell for handover (e.g., Layer 3 handover), or a candidate cell for handover.

[0099] ◆This indicates that the cell in question is the primary cell of a secondary cell group, such as the primary cell of a target secondary cell group or the primary cell of a candidate secondary cell group.

[0100] ◆Indicates that the cell is a secondary cell, such as a secondary cell in a primary cell group, or a secondary cell in a secondary cell group. ◆Indicates that the cell can be a cell in a secondary cell group used for dual connectivity (or multiple connectivity).

[0101] ◆Indicates that the cell is used for handover, or for LTM, or for conditional handover (CHO), or for conditional LTM (CLTM), or for subsequent handover, or for subsequent conditional handover (CHO), or for subsequent conditional LTM (CLTM).

[0102] ◆Indicates whether the cell is used for dual connectivity (or multiple connectivity), or for adding or changing the primary cell of a secondary cell group (PSCell addition change), or for adding or changing the primary cell of a consecutive secondary cell group (Subsequent PSCell addition change), or for adding or changing the primary cell of a conditional secondary cell group (Conditional PSCell Addition Change, CPAC), or for adding or changing a cell of a consecutive conditional secondary cell group (Subsequent CPAC).

[0103] ■ The cell's primary configuration information, such as the cell's downlink channel configuration information (e.g., the configuration information of the Physical Downlink Control Channel (PDCCH) and the Physical Downlink Shared Channel (PDSCH)) and the cell's uplink channel configuration information (e.g., the configuration information of the Physical Uplink Shared Channel (PUSCH)).

[0104] ■ The first indication information of the Time Advance Group (TAG) indicates the TAG to which the cell belongs, such as the TAG's identification information. In one example, this identification information is the unique identifier of a TAG within a third node. In another example, this indication information can be used to determine whether two cells belong to the same TAG or whether two cells can use the same TA. If the "first indication information of the Time Advance Group (TAG)" of two cells is the same, then the two cells are considered to belong to the same TAG or can use the same TA; otherwise, the two cells belong to different TAGs or use different TAs.

[0105] ■ First timing advance validity time information: This information indicates that after the user equipment receives the timing advance information of the "second cell identification information," or the timing advance information of the TAG containing the "second cell identification information," within this valid time period, the user equipment can use the received timing advance information to access the cell of the "second cell identification information," or other cells within the TAG containing the cell identified by the "second cell identification information." Otherwise, access is not possible. Furthermore, the first timing advance validity time information can be provided on a cell-by-cell basis (e.g., different cells may be configured with the same or different validity time information), or it can be provided on a TAG basis (e.g., cells within the same TAG have the same validity time information).

[0106] ■ First configuration information of the access signal, wherein the access signal is the access signal used by the user equipment to access the cell. In one example, the access signal is a random access signal, such as a random access preamble. In another example, the access signal is the signal used by the user equipment to obtain uplink synchronization information required for accessing the cell. After this information is sent to the user equipment, the user equipment will send the access signal to the cell according to the information, thereby obtaining the information required for accessing the cell (such as time synchronization information, such as timing advance information, etc.). This information includes at least one of the following:

[0107] ◆Frequency domain indication information, such as indication information for ordinary carriers, indication information for supplementary uplink carriers, and indication information for the bandwidth part (BWP), etc.

[0108] ◆Time alignment timer information, which indicates the validity period of uplink synchronization information (such as timing advance information).

[0109] ◆ Generic access configuration information, which includes at least one of the following: access configuration index information, target power information for the access signal received by the network receiver, maximum number of times the access signal is transmitted, access signal transmission power increment step size information, and access signal response window size information, etc.

[0110] ◆Dedicated random access configuration information, which can be used for access on a regular uplink carrier or for random access to supplement uplink carriers. This information includes at least one of the following: access signal index information (e.g., preamble index), configuration information related to contention-free access, occasion information (which indicates the configuration of resources for transmitting the access signal), information contained in the aforementioned "general access configuration information", indication information of the signal associated with each occasion (e.g., when the associated signal is a synchronization signal block (SSB), the indication information is the SSB index, or the synchronization signal / physical broadcast channel index; when the associated signal is a channel state information-reference signal (CSI-RS), the indication information is the CSI-RS index; furthermore, this information also indicates the beam used by the first node when transmitting the access signal), the number of SSBs corresponding to the access occasion, and resource configuration information (e.g., physical random access channel mask index used for random access resource selection).

[0111] ■ First configuration information for uplink control information, which indicates the configuration required for the user equipment to transmit uplink control information in the cell. Examples of the uplink control information can be at least one of the following: Scheduling Request (SR), Channel Quality Indicator (CQI), Channel State Indicator (CSI), Acknowledgement / Negative Acknowledgement (ACK / NACK) information for Hybrid Automatic Repeat Request (HARQ), etc. In one example, the uplink channel for transmitting the uplink control information is the Physical Uplink Control Channel (PUCCH); in another example, the uplink channel for transmitting the uplink control information is the Physical Uplink Shared Channel (PUSCH). The uplink channel can also be other types of channels, such as physical channels, logical channels, etc. This information includes uplink channel configuration information, such as PUCCH configuration information (e.g., resource time-domain location information, resource time-domain start location information, channel format information, power control information, SR resource information, CSI resource information, etc.). In one example, the resources configured in this information are already reserved by the third node when the information is generated. When the user equipment accesses the cell, it can transmit uplink control information based on this information. In another example, this information indicates that configuration information is provided. Whether uplink control information can be transmitted based on this configuration information depends on the network configuration. That is, the user equipment needs to determine whether it can transmit the uplink control information based on the network configuration (such as the configuration in subsequent steps 1-4). In addition, in one implementation, the third node only provides the configuration information to some cells. These cells may be the primary cells of the primary cell group, and / or the primary cells of the secondary cell group, and / or some secondary cells.

[0112] ■ First configuration information for uplink resources, indicating the configuration information used by the user equipment (UE) when transmitting uplink data in the cell. The uplink data can be the uplink data transmitted when the UE accesses the cell (in one embodiment, this uplink data is the first uplink data transmitted after accessing the cell, such as a message carried by SRB1, like a reconfiguration completion message). In one example, the uplink resource is a configured grant (CG), which is pre-prepared, meaning it is configured before the UE accesses the cell and can be used immediately upon access. This information includes at least one of the following: allocated resource type information, CG type information, modulation and coding scheme information, and resource location information (such as time-domain location information, frequency-domain location information, power control information, etc.). In one example, the resources configured by this information are reserved by the third node when the information is generated. Once the user equipment (UE) accesses the cell, it can transmit uplink data based on this information. In another example, the information indicates that configuration information is provided. Whether uplink data can be transmitted based on this configuration information depends on the network configuration; that is, the UE needs to determine whether it can transmit uplink data based on the network configuration (as in subsequent steps 1-4). Furthermore, in one implementation, the third node only provides the configuration information to a subset of cells. These cells can be primary cells of a primary cell group, and / or primary cells of a secondary cell group, and / or some secondary cells.

[0113] ■ First response information related to data, indicating configuration information prepared by the third node for data transmission of the user equipment, wherein the data is data that the third node can accept. In one example, the information pertains to all data of the user equipment, such as all SRBs and DRBs; in another example, the information pertains to a portion of the user equipment's data, such as specific SRBs and / or DRBs. In one implementation, this portion of data is data that the user equipment must transmit after handover or cell change (such as data of SRB1, data of at least one specific DRB). This information includes at least one of the following:

[0114] ■ Identification information for second-order data, such as the identification information for Packet / Protocol Data Unit Sessions (PDU sessions), Quality of Service (QoS) flows, Radio Bearers (RBs), Data Radio Bearers (DRBs), Signaling Radio Bearers (SRBs), and Internet Protocol (IP) flows.

[0115] ■ First data configuration response indication information, which indicates the purpose of the data transmission configured by the third node. Based on this information, the second node can determine which data transmissions are performed when the user equipment is in independent networking (after handover) and which data transmissions are performed when the user equipment is in dual connectivity (or multiple connectivity). The beneficial effect of this information is that the second node can determine the appropriate cell change method (such as handover, cell change, adding a secondary cell group, changing a secondary cell group, etc.) according to the purpose of data transmission, thereby improving the efficiency of data transmission. The purpose indicated by this information can be at least one of the following:

[0116] ◆This indicates that the data transmission occurs during standalone (SA) networking, specifically when a user equipment (UE) accesses a cell of a third node in a SA configuration. In one example, this information indicates that the data transmission occurred after the UE switched to the cell served by the third node.

[0117] ◆This indicates that data transmission occurs during dual-connectivity (or multi-connectivity) scenarios, specifically when a user equipment (UE) accesses the network in a dual-connectivity (or multi-connectivity) manner within the cell of a third node. In one example, this information indicates that the cell of the third node is a cell in the secondary cell group serving the UE, and the data transmission occurs at the third node when the third node is used as a secondary node serving the UE.

[0118] ■ Data forwarding first address information, which indicates the address information required when the second node sends data to the third node, including at least one of IP address and tunnel endpoint identification information.

[0119] ■ Second data configuration information, which indicates the configuration information used by the third node when serving the data, including at least one of the following configuration information:

[0120] ◆Configuration information for the Packet Data Convergence Protocol (PDCP) layer

[0121] ◆Configuration information for the Radio Link Control (RLC) protocol layer

[0122] ◆ Configuration information for the logical channel, which includes information about the cell serving the logical channel.

[0123] ■ First information relating to candidate configurations, indicating information about candidate configurations prepared by the third node for the user equipment, the information including one or more candidate configurations. For a candidate configuration, the information includes at least one of the following:

[0124] ■ Identification information for the first candidate configuration, which identifies a candidate configuration.

[0125] ■ First indication information of candidate configuration type, which indicates that the candidate configuration is at least one of the following types: candidate configuration of primary cell group, candidate configuration of secondary cell group.

[0126] ■ First cell configuration information for a candidate configuration, which includes configuration information for the cells included in the candidate configuration. This information may include configuration information for at least one cell. For a single cell, this information includes at least one of the following:

[0127] ◆Signage information for the third residential area

[0128] ◆The second configuration information for the community; a description of this information can be found in the "First Configuration Information for the Community" section above.

[0129] ◆The second indication information of the Time Advance Group (TAG) indicates the TAG of the cell identified by the "Identification Information of the Third Cell". For example, the identification information of the TAG is uniquely identified within the third node. In another example, this indication information can be used to determine whether two cells are in the same TAG or whether they can use the same TA. If the second indication information of the Time Advance Group (TAG) of two cells is the same, then the two cells are considered to be in the same TAG or can use the same TA; otherwise, the two cells are in different TAGs or use different TAs.

[0130] ◆The second timing advance validity period information indicates the validity period of the timing advance information after the user equipment receives the timing advance information of the "third cell identification information" or the timing advance information of the TAG where the "third cell identification information" is located. Within this validity period, the user equipment can use the received timing advance information to access the cell of the "third cell identification information" or other cells within the TAG where the cell identified by the "third cell identification information" is located; otherwise, access is not possible. Furthermore, the first timing advance validity period information can be provided on a cell-by-cell basis (e.g., different cells may be configured with the same or different validity period information), or it can be provided on a TAG basis (e.g., cells within the same TAG have the same validity period information).

[0131] ◆Second configuration information for the access signal; a description of this information can be found in the "First Configuration Information for the Access Signal" above.

[0132] ◆The second configuration information for uplink control information, the description of which can be found in the "First Configuration Information for Uplink Control Information" above.

[0133] ◆Second configuration information for uplink resources; a description of this information can be found in the "First Configuration Information for Uplink Resources" section above.

[0134] ■ First data configuration information of the candidate configuration, which includes configuration information of the data served by the candidate configuration, including at least one of the following:

[0135] ◆Identification information of third-party data

[0136] ◆Data forwarding second address information; a description of this information can be found in the "Data forwarding first address information" section above.

[0137] ◆Third data configuration information, which can be described in the "Second Data Configuration Information" section above.

[0138] ■ The first configuration information of the time advance group indicates the TAG information of the cell (or primary cell) configured by the third node. Based on this information, the second node can determine which cells belong to the same TAG, and thus determine the cells to which its obtained time advance (TA) information is applicable. This reduces the number of operations required by user equipment to obtain time advance information (such as sending access signals to different cells), further reducing energy consumption or resource waste of user equipment. This information includes at least one of the following:

[0139] ■ Information about the first TAG, which includes at least one TAG information configured for the user equipment cell. For a single TAG, this information includes at least one of the following:

[0140] ◆The identification information of the first TAG, in one example, is the identification information that uniquely identifies a TAG at the third node. In another example, this information can be used to determine whether two cells are in the same TAG or whether two cells can use the same TA. If the "identification information of the first TAG" of two cells is the same, then the two cells are considered to be in the same TAG or can use the same TA. Otherwise, the two cells are in different TAGs or use different TAs.

[0141] ◆Fourth Community Identification Information, which contains identification information for one or more communities.

[0142] ◆The third timing advance validity period information indicates the validity period of the timing advance information of the TAG identified by the "Identification Information of the First TAG". Within this validity period, the user equipment can access the cell in the TAG using the timing advance information of the TAG; otherwise, it cannot access the cell.

[0143] ■ Information about the first cell, which includes TAG-related information for at least one cell configured for the user equipment. For a single cell, this information includes at least one of the following:

[0144] ◆ Fifth Community Signage Information

[0145] ◆The identification information of the second TAG indicates the TAG to which the cell identified by the "fifth cell identification information" belongs. In one example, this identification information uniquely identifies a TAG at the third node. In another example, this information can be used to determine whether two cells belong to the same TAG or whether two cells can use the same TAG. If the "identification information of the second TAG" of two cells is the same, then the two cells are considered to belong to the same TAG or can use the same TAG; otherwise, the two cells belong to different TAGs or use different TAGs.

[0146] ◆Fourth Timing Advance Valid Time Information: This information indicates the validity period of the timing advance information for the cell identified by the "Fifth Cell Identification Information". Within this valid time, the user equipment can use the timing advance information to access the cell or access other cells in the TAG identified by the "Second TAG Identification Information"; otherwise, access is not possible. ■First Dynamic Configuration Indication Information: This information indicates the configuration that the user equipment needs to dynamically change at the third node during cell change or handover. The configuration that needs to be dynamically changed can be at least one of the following: cell activation or deactivation status, cell uplink control information configuration status (e.g., whether uplink control information transmission is configured), cell uplink resource configuration status (e.g., whether uplink resources are configured for data transmission), and data transmission configuration status (e.g., the cell used for data transmission). To indicate different configurations, this information includes at least one of the following:

[0147] ■ First dynamic configuration identifier information, which indicates a set of dynamic configurations. Upon receiving this information, the corresponding configuration information of the aforementioned "configuration that needs to be dynamically changed" can be determined.

[0148] ■ Configuration information for the first activation state, which indicates the activation and deactivation state of at least one cell when serving user equipment, and includes at least one of the following:

[0149] ◆First activation configuration identification information, which indicates a cell activation configuration, which corresponds to the activation status and / or deactivation status of at least one cell.

[0150] ◆A list of the first activated cells, indicating the identification information of one or more activated cells.

[0151] ◆The list of the first deactivated cells, which indicates the identification information of one or more deactivated cells.

[0152] ◆Indication information for the first activated cell, indicating the activated cell. In one example, this information includes a bitmap where any bit represents a cell. If a bit in the bitmap is "1" (or "0"), it indicates that the cell corresponding to that bit is activated; if a bit in the bitmap is "0" (or "1"), it indicates that the cell corresponding to that bit is deactivated. In one implementation, the cell represented by each bit in the bitmap is a cell configured in one of the candidate configurations described above; in another implementation, the cell represented by each bit in the bitmap is a cell configured in the "first response information related to the cell" and / or "first information related to the candidate configuration" described above. The bits in the bitmap from left to right correspond to cells arranged in ascending order of identification information, or the bits in the bitmap from right to left correspond to cells arranged in ascending order of identification information.

[0153] ■ Configuration status information of the first uplink control information, which indicates the configuration status of uplink control information of at least one cell when serving user equipment, such as whether uplink control information transmission is configured. In one example, whether uplink control information transmission is configured corresponds to whether PUCCH and / or PUSCH for transmitting uplink control information are configured. The information included in the configuration of the uplink control information of each cell can be found in the description in "First Configuration Information of Uplink Control Information" above. This information includes at least one of the following:

[0154] ◆ First uplink control information configuration identifier information, which indicates an uplink control information configuration, which corresponds to the configuration status of uplink control information transmission in at least one cell.

[0155] ◆A list of cells configured for uplink control information transmission, which indicates the identification information of one or more cells configured for uplink control information transmission.

[0156] ◆A list of cells that are not configured to transmit uplink control information, indicating the identification information of one or more cells that are not configured to transmit uplink control information.

[0157] ◆Indication information for the first configured uplink control information transmission cell, indicating the cell configured to transmit uplink control information. In one example, this information includes a bitmap, where any bit in the bitmap represents a cell. If a bit in the bitmap is "1" (or "0"), it indicates that the cell corresponding to that bit is configured to transmit uplink control information; if a bit in the bitmap is "0" (or "1"), it indicates that the cell corresponding to that bit is not configured to transmit uplink control information. In one implementation, the cell represented by each bit in the bitmap is a cell configured in one of the candidate configurations described above; in another implementation, the cell represented by each bit in the bitmap is a cell configured in the "first response information related to the cell" and / or "first information related to the candidate configuration". The bits in the bitmap from left to right correspond to cells arranged in ascending order of identification information, or the bits in the bitmap from right to left correspond to cells arranged in ascending order of identification information.

[0158] ■ Configuration status information of the first uplink resource, which indicates the configuration status of the uplink resources of at least one cell when serving a user equipment, such as whether uplink resources are configured. In one example, the uplink resource is used by the user equipment to send uplink data (in one embodiment, the uplink data is the first uplink data sent after accessing the cell, such as the message carried by SRB1, such as a reconfiguration completion message). The information contained in the configuration of the uplink resources of each cell can be found in the above-mentioned "First Configuration Information of Uplink Resources". This information includes at least one of the following:

[0159] ◆ First uplink resource configuration identifier information, which indicates an uplink resource configuration that corresponds to the uplink resource configuration status of at least one cell.

[0160] ◆A list of cells configured with uplink resources, which indicates the identification information of one or more cells configured with uplink resources.

[0161] ◆A list of cells without configured uplink resources, indicating the identifiers of one or more cells that have not been configured with uplink resources.

[0162] ◆Indication information for the first cell configured with uplink resources, indicating the cell configured with uplink resources. In one example, this information includes a bitmap, where any bit in the bitmap represents a cell. If a bit in the bitmap is "1" (or "0"), it indicates that the cell corresponding to that bit has been configured with uplink resources; if a bit in the bitmap is "0" (or "1"), it indicates that the cell corresponding to that bit has not been configured with uplink resources. In one implementation, the cell represented by each bit in the bitmap is a cell configured in one of the candidate configurations described above; in another implementation, the cell represented by each bit in the bitmap is a cell configured in the "first response information related to the cell" and / or "first information related to the candidate configuration" described above. The bits in the bitmap from left to right correspond to cells arranged in ascending order of identification information, or the bits in the bitmap from right to left correspond to cells arranged in ascending order of identification information.

[0163] ■ First data transmission configuration status information, which indicates the data transmission configuration status of at least one cell when serving a user equipment, such as a cell serving different data. This information includes at least one of the following:

[0164] ◆First data transmission configuration identification information, which indicates a data transmission configuration that corresponds to the user's data transmission configuration.

[0165] ◆First data list information, which indicates the transmission configuration for each type of data, such as the cell serving the data. For one type of data, this information includes at least one of the following:

[0166] ●Identification information for fourth-order data, such as the identification information for Packet / Protocol Data Unit Sessions (PDU sessions), Quality of Service (QoS) flows, Radio Bearers (RBs), Data Radio Bearers (DRBs), Signaling Radio Bearers (SRBs), and Internet Protocol (IP) flows.

[0167] ● First logical channel identification information, which indicates the logical channel for transmitting the "one type of data", the configuration of which can be given in the "second data configuration information" above.

[0168] ● First cell list information: In one example, this information includes identification information of at least one cell serving "a type of data." In another example, this information includes a bitmap where any bit represents a cell. If a bit in the bitmap is "1" (or "0"), it indicates that the cell corresponding to that bit is configured to transmit the "a type of data." If a bit in the bitmap is "0" (or "1"), it indicates that the cell corresponding to that bit is not configured to transmit the "a type of data." Each bit in the bitmap represents a cell configured in the aforementioned "first response information related to the cell" and / or "first information related to the candidate configuration." The bits in the bitmap from left to right correspond to cells arranged in ascending order of identification information, or the bits in the bitmap from right to left correspond to cells arranged in ascending order of identification information.

[0169] ◆Second cell list information, which indicates the data transmitted in each cell, and for a given cell, this information includes at least one of the following:

[0170] ●Sixth Community Signage Information

[0171] ● First data identifier list information, which indicates the data served by the cell identified by the "sixth cell identifier information". In one example, this information contains identifiers for one or more types of data, each of which can be any of the following identifiers: Packet / Protocol Data Unit Session (PDU session) identifier, Quality of Service (QoS) flow identifier, Radio Bearer (RB) identifier, Data Radio Bearer (DRB) identifier, Signaling Radio Bearer (SRB) identifier, and Internet Protocol (IP) flow identifier. In another example, the information includes a bitmap where any bit represents a type of data. If a bit in the bitmap is "1" (or "0"), it indicates that the data corresponding to that bit is served by the cell identified by the "Sixth Cell Identification Information." If a bit in the bitmap is "0" (or "1"), it indicates that the data corresponding to that bit is not served by the cell identified by the "Sixth Cell Identification Information." Each bit in the bitmap represents the data configured in the aforementioned "First Response Information Related to Data" and / or "First Information Related to Candidate Configuration." The bits in the bitmap from left to right correspond to data arranged in ascending order of identification information, or the bits in the bitmap from right to left correspond to data arranged in ascending order of identification information.

[0172] ● First logical channel list information, which indicates one or more logical channels served by the cell identified by the "Sixth Cell Identification Information". In one example, this information includes the identifiers of one or more logical channels served by the cell identified by the "Sixth Cell Identification Information". In another example, this information includes a bitmap, where any bit in the bitmap represents a logical channel. If a bit in the bitmap is "1" (or "0"), it indicates that the logical channel corresponding to that bit is served by the cell identified by the "Sixth Cell Identification Information". If a bit in the bitmap is "0" (or "1"), it indicates that the logical channel corresponding to that bit is not served by the cell identified by the "Sixth Cell Identification Information". The logical channel represented by each bit in the bitmap is the logical channel configured in the aforementioned "First Response Information Related to Data" and / or "First Information Related to Candidate Configuration". The bits in the bitmap from left to right correspond to logical channels arranged in ascending order of identification information (or priority), or the bits in the bitmap from right to left correspond to logical channels arranged in ascending order of identification information (or priority).

[0173] In one example, the aforementioned "first response information related to the cell" and "first response information related to the data" constitute the complete set of cells (which may be target cells, candidate cells, or the primary cell of a target secondary cell group, or the primary or secondary cell of a candidate secondary cell group) configured by the third node for the user equipment. When the user equipment accesses any cell, it determines all the configuration information required to access that cell based on the network configuration information (as in subsequent steps 1-4). Furthermore, when the second node receives the aforementioned information, it sends the aforementioned configuration information or partial configuration information (such as selecting some cells from all cells configured by the third node) provided by the third node to the user equipment. In another example, the aforementioned "first response information related to the cell" and "first response information related to the data" constitute the reference configuration information of cells (which may be target cells, candidate cells, or the primary cell of a target secondary cell group, or the primary or secondary cell of a candidate secondary cell group) configured by the third node for the user equipment. The configuration information used by the user equipment after accessing one of the cells is determined by combining the reference configuration and one of the candidate configurations from the aforementioned "first information related to candidate configuration".

[0174] Steps 1-3: The second node (e.g., source node, source master node, master node, auxiliary node) sends a first configuration message (e.g., also called a third message or other message name; this invention does not limit the message name) to the first node (e.g., user equipment). This message provides the user equipment with the configuration information required to access the cell. The cell can be a target cell for handover, a candidate cell, a cell in a target auxiliary cell group, or a cell in a candidate auxiliary cell group. The beneficial effect of this message is that it helps the user equipment determine the configuration required to access the cell, performs the necessary operations (such as downlink synchronization and uplink synchronization) in advance, and reduces communication interruptions or handover delays when the cell changes. This message contains configuration information for one or more cells configured for the user equipment. In one example, the one or more cells may belong to the aforementioned third node (the configuration information is obtained through steps 1-1 and 1-2 above). In another example, the one or more cells may belong to different nodes (the configuration information is obtained by interacting with the different nodes; the interaction process with each node can be found in steps 1-1 and 1-2 above). This configuration message includes at least one of the following:

[0175] ■ First configuration information related to the cell, which includes information about the cells configured for the user equipment. These cells may belong to different nodes or the same node. The cells included in this information include at least one of the following types of cells: target cells or candidate cells for handover or cell change (such as primary cells of a primary cell group, secondary cells of a secondary cell group), secondary cells (such as secondary cells of a primary cell group, secondary cells of a secondary cell group), etc. In one example, the information contains only at least one target cell or candidate cell (e.g., a primary cell in a primary cell group, a secondary cell in a secondary cell group) for handover or cell change. In another example, the information contains the minimum set of cells required for the user equipment to perform cell handover or cell change (one principle for defining the minimum set of cells here is to ensure that the user equipment can quickly perform necessary data transmission after cell handover or change, such as the rapid transmission of signaling, such as the transmission of signaling carried on SRB1, or the rapid transmission of some necessary data transmission, such as the necessary signaling carried on SRB and the necessary data carried on DRB, such as at least one specific SRB and at least one DRB, etc.). This cell set includes one or more primary cells as target or candidate cells, and optionally, the set may also include some secondary cells. After receiving this information, the user equipment will select a suitable cell from the cells configured in the information for access. For a single cell, the information includes at least one of the following:

[0176] ■ Signage information for the seventh residential area;

[0177] ■Indication information for the second cell type, which indicates the type of cell identified by the above-mentioned "identification information of the seventh cell". The type indicated by this information can be at least one of the following types: primary cell, secondary cell, primary cell and secondary cell;

[0178] ■ Indication information for the second associated cell, which indicates at least one cell associated with the cell identified by the "Identification Information of the Seventh Cell". In one example, if the cell identified by the "Identification Information of the Seventh Cell" is a primary cell, then the information indicates information (such as identification information) of at least one associated secondary cell. In another example, if the cell identified by the "Identification Information of the Seventh Cell" is a secondary cell, then the information indicates information (such as identification information) of the associated primary cell. In yet another example, if the cell identified by the "Identification Information of the Seventh Cell" is both a primary cell and a secondary cell, then the information indicates information (such as identification information) of at least one associated secondary cell when the cell identified by the "Identification Information of the Seventh Cell" is a primary cell. In yet another example, if the cell identified by the "Identification Information of the Seventh Cell" is both a primary cell and a secondary cell, then the information indicates information (such as identification information) of the primary cell when the cell identified by the "Identification Information of the Seventh Cell" is a secondary cell.

[0179] ■ The third configuration information of the community, the description of which can be found in the above "first configuration information of the community";

[0180] ■ The third indication information of the timing advance group indicates the TAG of the cell (or primary cell), such as the TAG identification information and the TAG index information. In one example, this information uniquely identifies a TAG among all cells configured in the "first configuration information related to the cell". This information is different from the "first indication information of the timing advance group", "second indication information of the timing advance group", and "first configuration information of the timing advance group" mentioned above. The TAG identification information contained in the above information uniquely identifies a TAG within the third node, while this indication information uniquely identifies a TAG among all cells configured in the "first configuration information related to the cell" (these cells may belong to multiple different nodes, not just the third node). In one example, when the second node receives the "first indication information of the timing advance group", "second indication information of the timing advance group", or "first configuration information of the timing advance group" sent by other nodes, the second node needs to regenerate the TAG identification information. This information needs to uniquely identify different TAGs in the cells of these nodes; after receiving this information, the user equipment can determine the TAG of the "first configuration information related to the cell". In another implementation, the "third indication information of the timing advance group" can be used by the user equipment to determine whether two cells are in the same TAG. If the "third indication information of the timing advance group" of the two cells is the same, then the two cells are considered to be in the same TAG, or the two cells can use the same TA value. Otherwise, the two cells are considered to be in different TAGs, or the two cells use different TA values.

[0181] ■ Fifth timing advance effective time information: This information indicates that after the user equipment receives the timing advance information of the "identification information of the seventh cell," or the timing advance information of the TAG containing the "identification information of the seventh cell," within this effective time, the user equipment can use the received timing advance information to access the cell identified by the "identification information of the seventh cell," or other cells within the TAG containing the cell identified by the "identification information of the seventh cell." Otherwise, access is not possible. Furthermore, the fifth timing advance effective time information can be provided on a cell-by-cell basis (e.g., different cells may be configured with the same or different effective time information), or it can be provided on a TAG basis (e.g., cells within the same TAG have the same effective time information).

[0182] ■ First cell configuration instruction information, the description of which can be found in the above "First cell configuration response instruction information";

[0183] ■ The third configuration information of the access signal, the description of which can be found in the above "first configuration information of the access signal";

[0184] ■ The third configuration information for uplink control information, the description of which can be found in the above-mentioned "first configuration information for uplink control information". In one example, when the user equipment accesses the cell identified by the "identification information of the fourth cell", it determines whether to transmit uplink control information according to the configuration information. In another example, when the user equipment accesses the cell identified by the "identification information of the fourth cell", it determines whether to transmit uplink control information according to further instructions from the network (in one implementation, the network side instructs the user equipment not to transmit uplink control information in the cell after accessing the cell identified by the "identification information of the fourth cell").

[0185] ■ The third configuration information for uplink resources, which can be described in the above-mentioned "first configuration information for uplink resources". In one example, when a user equipment accesses the cell identified by the "identification information of the seventh cell", it determines whether to transmit uplink data based on the configuration information. In another example, when a user equipment accesses the cell identified by the "identification information of the seventh cell", it determines whether to transmit uplink data using the configuration in the configuration information based on further instructions from the network (in one implementation, the network side instructs the user equipment not to transmit uplink data in the cell after accessing the cell identified by the "identification information of the seventh cell").

[0186] ■ First configuration information related to data, indicating the configuration information required for the user equipment to perform data transmission. In one example, the information pertains to all data of the user equipment, such as all SRBs and DRBs. In another example, the information pertains to a portion of the user equipment's data, such as specific SRBs and / or DRBs. In one implementation, this portion of data is data that the user equipment must transmit after handover or cell change (such as data for SRB1, data for at least one specific DRB). This information includes at least one of the following:

[0187] ■Identification information of the fifth data

[0188] ■ Fourth data configuration information, see "Second Data Configuration Information" above.

[0189] ■ Second information relating to candidate configurations, which includes information about one or more candidate configurations. For a candidate configuration, this information includes at least one of the following:

[0190] ■ Identification information of the second candidate configuration

[0191] ■ Signage information for the eighth residential area

[0192] ■ Second indication information of the candidate configuration type, indicating that the candidate configuration is at least one of the following types: candidate configuration of a primary cell group, candidate configuration of a secondary cell group. When a user equipment needs to access a cell, if the type indicated by this information is a candidate configuration of a primary cell group, the user equipment needs to release the source cell group and access the new cell group; if the type indicated by this information is a candidate configuration of a secondary cell group, the user equipment needs to retain the original cell group and add the new cell group.

[0193] ■ The second cell configuration information for the candidate configuration, which can be described in the "First Cell Configuration Information for Candidate Configurations" section above.

[0194] ■ The second data configuration information for the candidate configuration, which can be described in the "First Data Configuration Information for Candidate Configurations" section above.

[0195] ■ The fourth indication information of the timing advance group indicates the TAG of the cell (or primary cell) corresponding to the candidate configuration, such as the TAG identification information and the TAG index information. In one example, this information uniquely identifies a TAG among all cells configured in the "second information related to the candidate configuration". This information is different from the "first indication information of the timing advance group", "second indication information of the timing advance group" and "first configuration information of the timing advance group". The TAG identification information contained in the above information uniquely identifies a TAG within the third node, while this indication information uniquely identifies a TAG among all cells configured in the "second information related to the candidate configuration" (these cells may belong to multiple different nodes, not just the third node). After receiving this information, the user equipment can determine the TAG of the candidate cell in the "second information related to the candidate configuration". In another implementation, the "fourth indication information of the timing advance group" can be used by the user equipment to determine whether two cells are in the same TAG. If the "fourth indication information of the timing advance group" of the two cells are the same, then the two cells are considered to be in the same TAG, or the two cells can use the same TA value. Otherwise, the two cells are considered to be in different TAGs, or the two cells use different TA values.

[0196] ■ The sixth timing advance effective time information indicates that after the user equipment receives the timing advance information of the "identification information of the eighth cell", or the timing advance information of the TAG where the "identification information of the eighth cell" is located, within the effective time, the user equipment can use the received timing advance information to access the cell of the "identification information of the eighth cell", or other cells within the TAG where the cell identified by the "identification information of the eighth cell" is located; otherwise, access is not possible. Furthermore, the sixth timing advance effective time information can be provided on a cell-by-cell basis (e.g., different cells may be configured with the same or different effective time information), or it can be provided on a TAG basis (e.g., cells within the same TAG have the same effective time information).

[0197] ■ The second configuration information for the time advance group indicates the TAG information of the cell configured for the user equipment. Based on this information, the first node can determine which cells belong to the same TAG, and thus determine the cells to which the obtained time advance (TA) is applicable, thereby reducing the number of operations required for the user equipment to obtain time advance information, and further reducing the user equipment's energy consumption or resource waste. This information includes at least one of the following:

[0198] ■ Information about the second TAG, which includes at least one TAG information configured for the user equipment cell. For a single TAG, this information includes at least one of the following:

[0199] ◆The identification information of the third TAG, or the index information of the first TAG, in one example, is information that uniquely identifies a TAG among all candidate cells or candidate primary cells configured for the user equipment. In another example, this information can be used to determine whether two cells are in the same TAG, or whether two cells can use the same TA. If the "identification information of the third TAG" of two cells is the same, then the two cells are considered to be in the same TAG or can use the same TA; otherwise, the two cells are in different TAGs or use different TAs.

[0200] ◆ Ninth Community Identification Information, which contains identification information for one or more communities.

[0201] ◆The fifth timing advance validity period information indicates the validity period of the timing advance information for the TAG identified by the "Identification Information of the Third TAG" or the "Index Information of the First TAG". Within this validity period, the user equipment can use the timing advance information of the TAG to access the cell in the TAG; otherwise, it cannot access the cell.

[0202] ■ Information about the second cell, which includes TAG-related information for at least one cell configured for the user equipment. For a single cell, this information includes at least one of the following:

[0203] ◆Tenth Community Signage Information

[0204] ◆The identification information of the fourth TAG, or the index information of the second TAG, indicates the TAG to which the cell identified by the "tenth cell identification information" belongs. In one example, this identification information or index information is information that uniquely identifies a TAG among all candidate cells or candidate primary cells configured for the user equipment. In another example, this information can be used to determine whether two cells are in the same TAG, or whether two cells can use the same TAG. If the "identification information of the fourth TAG" of two cells is the same, then the two cells are considered to be in the same TAG or can use the same TAG; otherwise, the two cells are in different TAGs or use different TAGs.

[0205] ◆The sixth timing advance validity period information indicates the validity period of the timing advance information for the cell identified by the "tenth cell identification information". Within this validity period, the user equipment can use the timing advance information to access the cell or access other cells in the TAG identified by the "fourth TAG identification information" or the "second TAG index information"; otherwise, access is not possible.

[0206] ■ Second dynamic configuration indication information, which indicates the configuration that the user equipment needs to dynamically change during cell change or handover. The configuration that needs to be dynamically changed can be at least one of the following: cell activation or deactivation status, cell uplink control information configuration status (e.g., whether uplink control information transmission is configured), cell uplink resource configuration status (e.g., whether uplink resources are configured for data transmission), and data transmission configuration status (e.g., the cell used for data transmission). The configuration that needs to be dynamically changed can be the configuration of the serving cell or cell group currently serving the user equipment, or the configuration of the cell or cell group serving the user equipment after cell handover or cell change. To indicate different configurations, this information includes at least one of the following:

[0207] ■ Second dynamic configuration identification information, which indicates a set of dynamic configurations. Upon receiving this information, the corresponding configuration information of the aforementioned "configuration that needs to be dynamically changed" can be determined.

[0208] ■ Configuration information for the second activation state, which indicates the activation and deactivation state of at least one cell when serving user equipment, and includes at least one of the following:

[0209] ◆Second activation configuration identification information, which indicates a cell activation configuration, which corresponds to the activation status and / or deactivation status of at least one cell.

[0210] ◆A list of second-activated cells, indicating the identification information of one or more activated cells.

[0211] ◆A list of the second deactivated cells, which indicates the identification information of one or more deactivated cells.

[0212] ◆Indication information for the second activated cell, indicating the activated cell. In one example, this information includes a bitmap where any bit represents a cell. If a bit in the bitmap is "1" (or "0"), it indicates that the cell corresponding to that bit is activated; if a bit in the bitmap is "0" (or "1"), it indicates that the cell corresponding to that bit is deactivated. In one implementation, each bit in the bitmap represents a cell configured in one of the candidate configurations described above; in another implementation, each bit in the bitmap represents a cell configured in the "first configuration information related to the cell" and / or the "second information related to the candidate configuration." The bits in the bitmap from left to right correspond to cells arranged in ascending order of identification information, or the bits in the bitmap from right to left correspond to cells arranged in ascending order of identification information.

[0213] ■ Configuration status information for the second uplink control information, which indicates the configuration status of uplink control information in at least one cell when serving a user equipment, such as whether uplink control information transmission is configured. In one example, whether uplink control information transmission is configured corresponds to whether PUCCH and / or PUSCH for transmitting uplink control information are configured. The configuration of the uplink control information for each cell can be found in the "First Configuration Information for Uplink Control Information" above. This information includes at least one of the following:

[0214] ◆Second uplink control information configuration identifier information, which indicates an uplink control information configuration that corresponds to the configuration status of uplink control information transmission in at least one cell.

[0215] ◆A list of cells configured for uplink control information transmission, which indicates the identification information of one or more cells configured for uplink control information transmission.

[0216] ◆A list of cells that are not configured to transmit uplink control information, which indicates the identification information of one or more cells that are not configured to transmit uplink control information.

[0217] ◆Secondary indication information for cells configured to transmit uplink control information, indicating cells configured to transmit uplink control information. In one example, this information includes a bitmap, where any bit in the bitmap represents a cell. If a bit in the bitmap is "1" (or "0"), it indicates that the cell corresponding to that bit is configured to transmit uplink control information; if a bit in the bitmap is "0" (or "1"), it indicates that the cell corresponding to that bit is not configured to transmit uplink control information. In one implementation, each bit in the bitmap represents a cell configured in one of the candidate configurations described above; in another implementation, each bit in the bitmap represents a cell configured in the "first configuration information related to the cell" and / or the "second information related to the candidate configuration." The bits in the bitmap from left to right correspond to cells arranged in ascending order of identification information, or the bits in the bitmap from right to left correspond to cells arranged in ascending order of identification information.

[0218] ■ Configuration status information of the second uplink resource, which indicates the configuration status of uplink resources in at least one cell when serving a user equipment, such as whether uplink resources are configured. In one example, the uplink resource is used by the user equipment to send uplink data (in one embodiment, the uplink data is the first uplink data sent after accessing the cell, such as a message carried by SRB1, such as a reconfiguration completion message). The configuration of the uplink resources of each cell can be found in the above-mentioned "First Configuration Information of Uplink Resources". This information includes at least one of the following:

[0219] ◆Second uplink resource configuration identification information, which indicates an uplink resource configuration that corresponds to the uplink resource configuration status of at least one cell.

[0220] ◆A list of cells configured with uplink resources, which indicates the identification information of one or more cells configured with uplink resources.

[0221] ◆A list of cells without configured uplink resources, indicating the identification information of one or more cells that have not been configured with uplink resources.

[0222] ◆Indication information for cells with configured uplink resources, indicating cells that have configured uplink resources. In one example, this information includes a bitmap where any bit represents a cell. If a bit in the bitmap is "1" (or "0"), it indicates that the cell corresponding to that bit has configured uplink resources; if a bit in the bitmap is "0" (or "1"), it indicates that the cell corresponding to that bit has not configured uplink resources. In one implementation, each bit in the bitmap represents a cell configured in one of the candidate configurations described above; in another implementation, each bit in the bitmap represents a cell configured in the "first configuration information related to cells" and / or the "second information related to candidate configurations" described above. The bits in the bitmap from left to right correspond to cells arranged in ascending order of identification information, or the bits in the bitmap from right to left correspond to cells arranged in ascending order of identification information.

[0223] ■ Second data transmission configuration status information, which indicates the data transmission configuration status of at least one cell when serving a user equipment, such as a cell serving different data. This information includes at least one of the following:

[0224] ◆Second data transmission configuration identification information, which indicates a data transmission configuration corresponding to the user's data transmission configuration.

[0225] ◆Second data list information, which indicates the transmission configuration for each type of data, such as the cell serving the data. For one type of data, this information includes at least one of the following:

[0226] ●Identification information for the sixth type of data, such as the identification information for Packet / Protocol Data Unit Sessions (PDU sessions), Quality of Service flows (QoS flows), Radio bearers (RBs), Data Radio Bearers (DRBs), Signaling Radio Bearers (SRBs), and Internet Protocol (IP) flows.

[0227] ● Second logical channel identification information, which indicates the logical channel for transmitting the "one type of data", the configuration of which can be given in the "second data configuration information" or "third data configuration information" above.

[0228] ● Third cell list information: In one example, this information contains identification information of at least one cell serving "a type of data." In another example, this information contains a bitmap where any bit represents a cell. If a bit in the bitmap is "1" (or "0"), it indicates that the cell corresponding to that bit is configured to transmit the "a type of data." If a bit in the bitmap is "0" (or "1"), it indicates that the cell corresponding to that bit is not configured to transmit the "a type of data." Each bit in the bitmap represents a cell configured in the aforementioned "first configuration information related to cells" and / or "second information related to candidate configurations." The bits in the bitmap from left to right correspond to cells arranged in ascending order of identification information, or the bits in the bitmap from right to left correspond to cells arranged in ascending order of identification information.

[0229] ◆Fourth cell list information, which indicates the data transmitted in each cell, and for a given cell, this information includes at least one of the following:

[0230] ●Eleventh Community Signage Information

[0231] ● Second data identifier list information, which indicates the data served by the cell identified by the "eleventh cell identifier information". In one example, this information contains identifiers for one or more types of data, each of which can be any of the following identifiers: Packet / Protocol Data Unit Session (PDU session) identifier, Quality of Service (QoS) flow identifier, Radio Bearer (RB) identifier, Data Radio Bearer (DRB) identifier, Signaling Radio Bearer (SRB) identifier, and Internet Protocol (IP) flow identifier. In another example, the information includes a bitmap where any bit represents a type of data. If a bit in the bitmap is "1" (or "0"), it indicates that the data corresponding to that bit is served by the cell identified by the "eleventh cell identification information." If a bit in the bitmap is "0" (or "1"), it indicates that the data corresponding to that bit is not served by the cell identified by the "eleventh cell identification information." Each bit in the bitmap represents data configured in the aforementioned "first configuration information related to data" and / or "second information related to candidate configurations." The bits in the bitmap from left to right correspond to data arranged in ascending order of identification information, or the bits in the bitmap from right to left correspond to data arranged in ascending order of identification information.

[0232] ● Second logical channel list information, which indicates one or more logical channels served by the cell identified by the "eleventh cell identification information". In one example, this information includes the identifiers of one or more logical channels served by the cell identified by the "eleventh cell identification information". In another example, this information includes a bitmap, where any bit in the bitmap represents a logical channel. If a bit in the bitmap is "1" (or "0"), it indicates that the logical channel corresponding to that bit is served by the cell identified by the "eleventh cell identification information". If a bit in the bitmap is "0" (or "1"), it indicates that the logical channel corresponding to that bit is not served by the cell identified by the "tenth cell identification information". The logical channel represented by each bit in the bitmap is the logical channel configured in the aforementioned "first configuration information related to data" and / or "second information related to candidate configuration". The bits in the bitmap from left to right correspond to logical channels arranged in ascending order of identification information (or priority), or the bits in the bitmap from right to left correspond to logical channels arranged in ascending order of identification information (or priority).

[0233] In one example, the first configuration message mentioned above could be a Radio Resource Control (RRC) configuration message, RRCReconfiguration, or other messages.

[0234] After receiving the first configuration message, the user equipment may perform at least one of the following actions.

[0235] The user equipment (UE) can apply the above-mentioned "first configuration information related to the cell" and / or "first configuration information related to data". In one example, the UE can use the above-mentioned "first configuration information related to the cell" and / or "first configuration information related to data" as basic configuration information. If the subsequently received first notification message does not indicate an update to the configuration, the UE accesses the target cell or candidate cell using the basic configuration information. If the candidate cell receives the following first notification message indicating an update to the configuration, the UE updates the configuration according to the message and accesses the cell. In one embodiment, the above-mentioned first configuration message may not contain "second information related to the candidate configuration". The UE can configure at least one cell included in the above-mentioned "first configuration information related to the cell" as a serving cell (these cells may belong to different base stations. In the prior art, if the UE does not configure dual connectivity, these cells belonging to different base stations cannot be simultaneously configured as serving cells of the UE. However, in this invention, the UE is allowed to configure the cells in the "first configuration information related to the cell" as serving cells), but these serving cells are not activated or the UE does not transmit data on these cells. User equipment (UE) simply applies the configurations of these cells. The advantage of this is that when handover or cell changes occur, UE can quickly apply these configurations to transmit data within the cell. Furthermore, if "secondary information related to candidate configurations" is not included, each cell will only be configured once in the "first configuration information related to the cell" (the "secondary information related to candidate configurations" may contain different configuration information for the same cell, such as one configuration when the cell is a primary cell and another configuration when it is a secondary cell for other primary cells). Therefore, this configuration method also reduces the signaling overhead for configuring UE.

[0236] ■ User equipment (UE) can use the aforementioned "first configuration information related to the cell" and / or "first configuration information related to data" as reference configuration information, and use the "second information related to the candidate configuration" as the incremental configuration of the candidate cell or cell group. When UE needs to generate a complete configuration for a candidate cell or cell group, UE needs to combine the reference configuration and a candidate configuration to generate the complete configuration. If the first notification message received by UE also contains instructions for dynamically changing the configuration, UE needs to combine the instructions and the generated complete configuration to obtain the final configuration required for accessing the cell or cell group.

[0237] Furthermore, the present invention also includes the following process,

[0238] Steps 1-4: The second node sends a first notification message (e.g., also called a fourth message or other message name; this invention does not limit the message name) to the first node. This message notifies the user equipment of the information required to access the cell (which may be a target cell, a candidate cell, the primary cell of a target secondary cell group, or the primary or secondary cell of a candidate secondary cell group). In one example, this message triggers the user equipment to perform a cell change or handover. In another example, this message does not trigger the user equipment to perform a cell change or handover. After receiving this message, the first node only accesses the cell if certain conditions are met (e.g., receiving other messages sent by the second node, or the cell change condition being met). The beneficial effect of this message is that it helps the user equipment obtain the information required to access the cell, reducing communication interruptions and latency during the user equipment's cell access process. This message includes at least one of the following information:

[0239] ■ Indication information for the candidate configuration, which indicates the candidate configuration targeted by the first notification message, including at least one of the following:

[0240] ■Identification information of the third candidate configuration

[0241] ■ Identification information of the twelfth cell, which indicates the cell to which the first notification message is addressed. In one example, when the first notification message triggers a user equipment to perform cell handover or cell change, the cell indicated by this information is the primary cell serving the user equipment after the cell handover or cell change (such as the primary cell of a primary cell group or the primary cell of a secondary cell group). In another example, when the first notification message does not trigger a user equipment to perform cell handover or cell change, the cell indicated by this information may be the primary cell serving the user equipment in the future (such as the primary cell of a primary cell group or the primary cell of a secondary cell group).

[0242] ■ A third indication of the candidate configuration type, indicating that the candidate configuration is at least one of the following types: a candidate configuration for a primary cell group, or a candidate configuration for a secondary cell group. If a user equipment needs to access a cell after receiving the aforementioned first notification message, when the type indicated by this information is a candidate configuration for a primary cell group, the user equipment needs to release the source cell group and access the new cell group; when the type indicated by this information is a candidate configuration for a secondary cell group, the user equipment needs to retain the original cell group and add the new cell group.

[0243] ■ First configuration indication information, which indicates the configuration required for serving the user equipment. In one example, this configuration is dynamically changing; that is, when the user equipment performs cell handover or cell change, this configuration information will change dynamically. The network needs to dynamically indicate the configuration required by the user equipment. In one example, this information is used to update the configuration information configured for the user in steps 1-3 above. In another example, this information is used to provide configuration information not provided in steps 1-3 above. In one example, when the first notification message triggers the user equipment to perform cell handover or cell change, the configuration indicated by this information is the configuration for serving the user equipment after the cell handover or cell change. In another example, when the first notification message does not trigger the user equipment to perform cell handover or cell change, the cell indicated by this information may be the future configuration for serving the user equipment. The user equipment can store this configuration information so that it can use the configuration in a timely manner when a cell change or handover occurs. The dynamically changing configuration includes at least one of the following configurations: cell activation or deactivation status, cell uplink control information configuration status (e.g., whether uplink control information transmission is configured), cell uplink resource configuration status (e.g., whether uplink resources are configured for data transmission), and data transmission configuration status (e.g., the cell used for data transmission). The beneficial effect of this information is that it reduces the signaling overhead of reconfiguring user equipment during handover and reduces communication interruptions or delays during handover. This information includes at least one of the following:

[0244] ■ The third dynamic configuration identification information indicates the configuration that the user equipment needs to adopt or store. The configuration corresponding to this information can be determined through the "second dynamic configuration indication information" in steps 1-3 above.

[0245] ■ Configuration information for the third activation state; a description of this information can be found in the "Configuration Information for the Second Activation State" section above.

[0246] ■ The configuration status information of the third uplink control information, which can be described in the above "Configuration status information of the second uplink control information".

[0247] ■ Configuration status information of the third uplink resource. For a description of this information, please refer to the above "Configuration status information of the second uplink resource".

[0248] ■ Third data transmission configuration status information, the description of which can be found in the above "Second data transmission configuration status information".

[0249] ■ Serving cell configuration indication information, which indicates the configuration update information of the serving cell. After receiving this information, the user equipment will update the configuration of the serving cell currently serving the user equipment, thereby continuing to use the serving cell for data transmission. This information includes at least one of the following:

[0250] ■ Fourth dynamic configuration identification information, which indicates the configuration that the user equipment needs to use in the cell or cell group serving the equipment. The configuration corresponding to this information can be determined through the "second dynamic configuration indication information" in steps 1-3 above.

[0251] ■ Configuration information for the fourth activation state; a description of this information can be found in the "Configuration Information for the Second Activation State" above.

[0252] ■ The configuration status information of the fourth uplink control information, the description of which can be found in the above "Configuration status information of the second uplink control information".

[0253] ■ Configuration status information of the fourth uplink resource. For a description of this information, please refer to the above "Configuration status information of the second uplink resource".

[0254] ■ Fourth data transmission configuration status information, the description of which can be found in the above "Second data transmission configuration status information".

[0255] ■ First information associated with timing advance, which indicates the timing advance (TA) information used when accessing the cell indicated by the "Identification Information of the Third Candidate Configuration" or the "Identification Information of the Twelfth Cell", includes at least one of the following:

[0256] ■ First timing advance information: This information indicates the timing advance value. When sending uplink signals, the user equipment can transmit according to the value indicated by this information.

[0257] ■ The seventh timing advance effective time indicates the effective time of the aforementioned "first timing advance information." Within this effective time, the aforementioned "first timing advance information" can be used by the user equipment (UE) for uplink signal transmission. If the time indicated by this information is exceeded, the aforementioned "first timing advance information" cannot be used by the UE for uplink signal transmission. In one example, when the UE receives this information, it starts a timer corresponding to the aforementioned "candidate configuration indication information." If the timer does not expire, the UE can use the aforementioned "first timing advance information" to access the cell indicated by the "candidate configuration indication information." In another example, when the UE receives this information, it starts a timer for the TAG corresponding to the aforementioned "candidate configuration indication information" (such as the TAG to which the cell indicated by the aforementioned "candidate configuration indication information" belongs). If the timer does not expire, the UE can use the aforementioned "first timing advance information" to access the cell in its TAG.

[0258] ■ Indication information for the first TAG, which indicates the TAG associated with the aforementioned "first timing advance information". In one example, this information may be information used to indicate the TAG associated with the Transmission Control Indication (TCI) state. In one example, this information is the "identification information of the first TAG" described below; in another example, this information is used to indicate the identifier of the TAG, that is, this information itself is not identification information, but the user equipment can obtain the identification information of the TAG based on this information; in yet another example, this information is used to indicate the associated TCI state, and each associated TCI state corresponds to a TAG. For example, this information may be "tag-id-ptr" (in one example, this information may be named a pointer to the TAG identification information, i.e., TAG ID pointer). In one example, this information may be information used to indicate the TAG that is associated with the TCI state. Before receiving the first notification message, as described in steps 1-3 above, the user equipment (UE) is configured with different TCI state identifiers. Each TCI state identifier has a corresponding "tag-id-ptr" information, which indicates the TAG associated with that TCI state. If the value of this information is a first value (e.g., n0), the TAG associated with that TCI state is the TAG indicated by the first TAG identifier (e.g., tag-id). If the value of this information is a second value (e.g., n1), the TAG associated with that TCI state is the TAG indicated by the second TAG identifier, and so on. Therefore, when the UE receives the "tag-id-ptr" through the first notification message, it can determine the TAG associated with the received "timing advance information" based on this information, and it can also obtain the TCI state associated with that "timing advance information". When the first node accesses the cell, it can determine the applicable TA value based on the TCI state it uses.

[0259] ■ The identification information of the first TAG, which indicates the identification information of the TAG associated with the aforementioned "first timing advance information". Upon receiving this information, the first node will determine the TAG to which the received TA information belongs based on this information;

[0260] ■ The identification information of the first TCI state indicates the TCI state associated with the above-mentioned "first timing advance information". Before receiving the above-mentioned first notification message, the first node will be pre-configured with different TCI state identification information through the above steps 1-3 (in one example, the identification information of the TCI state identifies the cell used for user access). Each TCI state identification information has a corresponding "tag-id-ptr" information, which is used to indicate the TAG associated with the TCI state. If the value of the information is the first value (such as n0), the TAG associated with the TCI state is the TAG indicated by the first TAG identifier (such as tag-id). If the value of the information is the second value (such as n1), the TAG associated with the TCI state is the TAG indicated by the second TAG identifier, and so on. When the first node receives the aforementioned first notification message, it determines the "tag-id-ptr" information corresponding to the TCI state based on the "TCI state identifier information" included therein, and determines the TAG corresponding to the "TCI state identifier information" based on this information, as well as other TCI states corresponding to the same TAG as the "TCI state identifier information". When the first node accesses the cell, it can determine the applicable TA value based on the TCI state it is using.

[0261] The first notification message mentioned above is a message that notifies TA information, such as a control element (CE) of the Media Access Control (MAC) layer, or a message of the physical layer, or an RRC message.

[0262] The mechanism described above for dynamically changing some configurations of user equipment through the first notification message can dynamically change the configuration information of user equipment accessing candidate cells or cell groups. This can help the network side adjust the resources prepared when configuring candidate cells or cell groups for user equipment in a timely manner, thereby improving the efficiency of resource utilization.

[0263] In one example (changing the configuration of the cell serving the user equipment), the aforementioned first notification message can be used to indicate changes to the configuration information of the cell or cell group serving the user equipment, such as dynamically activating or deactivating the cell serving the user equipment, dynamically changing the cell serving different data, dynamically changing the configuration of resources for transmitting uplink control information, etc.

[0264] In another example (changing the configuration of the cell serving the user equipment and the configuration of the target cell or cell group for handover), the aforementioned first notification message can be used to indicate changes to the configuration information of the cell or cell group serving the user equipment and the configuration information of the target cell or cell group for handover. Specifically, when the first notification message triggers the user equipment to perform a cell change or handover, the first notification message indicates, on the one hand, the change in the configuration of the cell serving the user equipment (e.g., changing the cell serving user data, changing the configuration of resources for transmitting uplink control information), and on the other hand, the configuration required to access the target cell or cell group (e.g., the cell serving user data, resources for transmitting uplink control information, resources for transmitting uplink data). In one implementation, changing the configuration of the cell or cell group serving the user equipment is to allow the user equipment to still use these serving cells or cell groups for data transmission during the cell change process, reducing communication interruptions and handover latency during the handover process. For example, when a handover occurs, the first notification message can be used to instruct the user equipment to retain some secondary cells serving the user equipment and update the configuration of these secondary cells, so that the user equipment can continue to use these secondary cells for data transmission, while the user equipment can also access a new cell or cell group.

[0265] In another example (changing the configuration of a candidate cell or cell group), the aforementioned first notification message can be used to indicate the configuration information of the candidate cell or cell group to which the user equipment (UE) is switching, such as activated or deactivated cells, cells serving different data, resources for transmitting uplink control information, and resources for transmitting uplink data. Upon receiving this information, the UE will not directly apply this configuration information for data transmission because the UE has not yet connected to the candidate cell or cell group. However, this method helps the UE obtain the latest configuration of the candidate cell or cell group in advance, enabling rapid connection when the UE connects, reducing communication interruptions and handover latency.

[0266] When the user equipment receives the aforementioned first notification message, and the message contains "first information associated with advance timing," the user equipment behaves as follows:

[0267] ■ Store the first timing advance information contained in the "first notification message". The timing advance information can be applied to the cell indicated by the "first notification message" (such as the first cell) and / or the TAG (or all cells corresponding to the TAG) of the cell indicated by the "first notification message" (such as the first cell) and / or one or more cells with the same TA value as the cell indicated by the "first notification message".

[0268] ■ Start or restart the timer corresponding to the cell indicated by the "First Notification Message" (such as the first cell), and / or start or restart the timer corresponding to the TAG containing the cell indicated by the "First Notification Message", and / or start or restart the timers corresponding to all cells in the TAG containing the indicated cell (in one example, all cells are all cells or candidate cells configured for the user equipment), and / or start or restart the timers corresponding to one or more cells with the same TA value as the indicated cell. This timer is used to determine whether the first timing advance information is valid.

[0269] ■ The user equipment accesses a cell (such as a second cell), which may be the same cell as the cell indicated by the "first notification message" or a different cell. The user equipment determines whether it can use the aforementioned "first timing advance information" to access the second cell based on the state of the timer:

[0270] ■ After steps 1-4, if the user equipment receives a first command message (which contains at least one of the following information: candidate configuration identification information, TCI status indication information, etc., and according to steps 1-3 above, the user equipment can know the second cell corresponding to the candidate configuration identification information), if the timer corresponding to the TAG of the second cell (or the timer corresponding to the second cell) has not timed out (is running), or the "third indication information of the timing advance group" or "fourth indication information of the timing advance group" corresponding to the second cell is the same as the "third indication information of the timing advance group" or "fourth indication information of the timing advance group" of the cell indicated by the "first notification message" and the timer corresponding to the "first timing advance information" in the "first notification message" is still running, then the user equipment can use the "first timing advance information" to access the second cell, such as executing the process of changing the cell without random access.

[0271] ■ After steps 1-4, when the user equipment determines an accessible cell (such as the second cell) through measurement, if the timer corresponding to the TAG of the second cell (or the timer corresponding to the second cell) has not timed out (is running), or if the "third indication information of the timing advance group" or "fourth indication information of the timing advance group" corresponding to the second cell is the same as the "third indication information of the timing advance group" or "fourth indication information of the timing advance group" of the cell indicated by the "first notification message" and the timer corresponding to the "first timing advance information" in the "first notification message" is still running, then the user equipment can use the "first timing advance information" to access the second cell, such as performing the process of not needing to change the cell for random access. In one embodiment, the user equipment (UE) determines whether to access the second cell based on whether certain conditions are met (e.g., the measurement results of the second cell meet certain thresholds). An example of this process is the Conditional LTM procedure. For instance, the UE obtains TA (Transmission Access Notice) information for accessing the second cell via a first notification message and starts a timer. If the first node determines that the conditions for accessing the second cell are met and the timer has not timed out or is running, the first node can use the TA information to access the second cell. Another example is that the UE obtains TA information for accessing the first cell via a first notification message and starts a timer corresponding to the TAG of the first cell or the timer corresponding to the first cell. If the first node determines that the conditions for accessing the second cell are met, and the TAG corresponding to the timer contains the second cell (or the "third indication information" or "fourth indication information" of the timing advance group corresponding to the second cell is the same as the "third indication information" or "fourth indication information" of the timing advance group for the first cell), and the timer has not timed out or is running, the UE can use the TA information to access the second cell. This can reduce the latency for the UE to access the second cell.

[0272] In steps 1-4, the "first configuration indication information" can be used to dynamically indicate the configuration information of the serving cell (or cell group) or target cell (or cell group) of the user equipment during cell handover or cell change. To achieve this, an interaction process between the second and third nodes may also be included. This interaction process is used to dynamically obtain the configuration information of the user equipment, including the following steps: Figure 4 As shown:

[0273] Steps 1-4a: The second node sends a second request message (e.g., also called a fifth message or other message name; this invention does not limit the message name) to the third node. This message requests the third node to provide the configuration information of the user equipment that needs to be updated. After receiving the updated configuration information through steps 1-4b below, the second node can instruct the user equipment to adopt the updated configuration, thereby ensuring that the user equipment can quickly adopt the updated configuration after switching to a new cell. The beneficial effect of this message is that it helps the third node dynamically change the configuration of the user equipment, improving the efficiency of resource utilization. This message contains information about at least one cell, which includes at least one of the following: a candidate primary cell, and a secondary cell that shares the user equipment with the candidate primary cell. For a single cell, this message includes at least one of the following:

[0274] ■The identification information for the thirteenth community. This identification information may be the same as the community identified in the "identification information for the twelfth community" in the first notification message mentioned above, or it may be different.

[0275] ■ First indication information of the access signal, indicating that the user equipment has sent an access signal. In one example, this access signal is a random access signal, such as a random access preamble. In another example, this access signal is the signal used by the user equipment to obtain uplink synchronization information required to access the cell. After receiving this information, the third node determines whether it has received the access signal. If it has, the third node can obtain timing advance information based on the received information and send it to the second node in step 1-4b. This information includes at least one of the following:

[0276] ■ First signal index information, which indicates the index of the assigned physical signal, such as the preamble index.

[0277] ■ First carrier indication information, which indicates the carrier on which the requested resource is located, such as a normal uplink carrier (Normal UL carrier) or a supplementary uplink carrier (Supplement UL carrier).

[0278] ■ First synchronization signal index information. This information indicates the index of the synchronization signal. In one example, the synchronization signal is SSB (SS / PBCH block, PBCH: Physical Broadcast Channel), then the index information is SSB Index.

[0279] ■ Index information of the first resource, which indicates the index information of the requested resource. In one example, this index information is the Physical Random Access Channel Mask Index (PRACH Mask Index).

[0280] ■ First resource indication information, which indicates the resources used by the user equipment to transmit access signals. This information can be a Random Access-Radio Network Temporary Identifier (RA-RNTI), that is, the resource associated with the RA-RNTI.

[0281] ■ Index of the first resource start symbol

[0282] ■ The index of the first resource start time slot, which is a time slot within a system frame.

[0283] ■ Frequency Domain Index of the First Resource

[0284] ■ The second measurement result information indicates the measurement result of the cell identified by the "thirteenth cell identification information". An example of this measurement result is Reference Signal Receiving Power (RSRP), Reference Signal Receiving Quality (RSRQ), or Signal to Interference plus Noise Ratio. In one example, this measurement result information may be a Layer 3 measurement result; in another example, it may be a Layer 1 measurement result. Upon receiving this information, the third node can determine whether to update the user equipment configuration.

[0285] Step 1-4b: The third node sends a second response message (e.g., also called a sixth message or other message name; this invention does not limit the message name) to the second node. This message provides the configuration of the user equipment generated by the third node, which can be used to update the user equipment configuration. This message ensures that the user equipment can quickly adopt the updated configuration after switching to a new cell. In one example, the second response message is sent after receiving the second request message; in another example, the second response message is sent proactively by the third node, such as when the third node determines that the user equipment configuration needs to be updated, so as to enable rapid configuration updates when the second node triggers the user equipment to change or switch cells. The beneficial effect of this message is that it helps the third node dynamically change the user equipment configuration and improves the efficiency of resource utilization. This message contains information about at least one cell, which includes at least one of the following: a candidate primary cell, and a secondary cell that shares the user equipment with the candidate primary cell. For a single cell, the message includes at least one of the following:

[0286] ■The identification information for the fourteenth community can be the same as the community identified in the "identification information for the twelfth community" in the first notification message mentioned above, or it can be different.

[0287] ■ Second information related to timing advance, which indicates the timing advance information of the cell identified by the "fourteenth cell identification information" obtained by the third node, includes at least one of the following:

[0288] ■ Second timing advance information: This information indicates the timing advance value. When sending uplink signals, the user equipment can transmit according to the value indicated by this information.

[0289] ■ The eighth timing advance effective time indicates the effective time of the aforementioned "second timing advance information". During this effective time, the aforementioned "second timing advance information" can be used by the user equipment for uplink signal transmission. If the time indicated by the information is exceeded, the aforementioned "second timing advance information" cannot be used by the user equipment for uplink signal transmission.

[0290] ■ The indication information for the second TAG indicates the TAG associated with the aforementioned "second timing advance information". In one example, this information may be information used to indicate the TAG associated with the Transmission Control Indication (TCI) state. In one example, this information is the "identification information of the second TAG" described below; in another example, this information is used to indicate the identifier of the TAG, that is, this information itself is not identification information, but the user equipment can obtain the identification information of the TAG based on this information; in yet another example, this information is used to indicate the associated TCI state, and each associated TCI state corresponds to a TAG. For example, this information may be "tag-id-ptr" (in one example, this information may be named a pointer to the TAG identification information, i.e., TAG ID pointer). In one example, this information may be information used to indicate the TAG that is associated with the TCI state. The identification information for the first TAG indicates the identification information of the TAG associated with the aforementioned "second timing advance information". Upon receiving this information, the second node will determine the TAG to which the received TA information belongs based on this information;

[0291] ■ Identification information for the second TAG, which indicates the TAG associated with the aforementioned "Second Timing Advance Information".

[0292] ■ Identification information for the second TCI state, which indicates the TCI state associated with the aforementioned "second timing advance information".

[0293] ■ Second indication information of the access signal, indicating the access signal that the user equipment has sent. In one example, the access signal is a random access signal, such as a random access preamble; in another example, the access signal is a signal used by the user equipment to obtain uplink synchronization information required to access the cell. This information includes at least one of the following:

[0294] ◆Second signal index information, which indicates the index of the assigned physical signal, such as the preamble index.

[0295] ◆Second carrier indication information, which indicates the carrier on which the requested resource is located, such as a normal uplink carrier (UL carrier) or a supplementary uplink carrier (UL carrier).

[0296] ◆Second synchronization signal index information, which indicates the index of the synchronization signal. In one example, the synchronization signal is SSB (SS / PBCH block, PBCH: Physical Broadcast Channel), then the index information is SSB Index.

[0297] ◆ Index information of the second resource, which indicates the index information of the requested resource. In one example, this index information is the Physical Random Access Channel Mask Index (PRACH Mask Index).

[0298] ◆Second resource indication information, which indicates the resources used by the user equipment to transmit access signals. This information can be a Random Access-Radio Network Temporary Identifier (RA-RNTI), that is, the resource associated with the RA-RNTI.

[0299] ◆Index to the second resource start symbol

[0300] ◆Index to the second resource start time slot, which is a time slot within a system frame.

[0301] ◆Frequency domain index of the second resource

[0302] ■ Second configuration indication information, which indicates the configuration information of at least one candidate cell configured by the third node for the user equipment. In one example, this configuration is dynamically changing, meaning that when the user equipment performs cell handover or changes, the configuration information will dynamically change, and the network needs to dynamically indicate the configuration required by the user equipment. The dynamically changing configuration includes at least one of the following configurations: cell activation or deactivation status, cell uplink control information configuration status (e.g., whether uplink control information transmission is configured), cell uplink resource configuration status (e.g., whether uplink resources are configured for data transmission), and data transmission configuration status (e.g., the cell used for data transmission). The beneficial effects of this information are that it reduces the signaling overhead of reconfiguring the user equipment during handover, reduces communication interruptions or delays during handover, and can also effectively change the resource allocation of the third node, improving resource utilization efficiency. This information includes at least one of the following:

[0303] ■ Fourth dynamic configuration identification information, which indicates the configuration that the user equipment needs to adopt or store.

[0304] ■ Configuration information for the fourth activation state; a description of this information can be found in the "Configuration Information for the Second Activation State" above.

[0305] ■ The configuration status information of the fourth uplink control information, the description of which can be found in the above "Configuration status information of the second uplink control information".

[0306] ■ Configuration status information of the fourth uplink resource. For a description of this information, please refer to the above "Configuration status information of the second uplink resource".

[0307] ■ Fourth data transmission configuration status information, the description of which can be found in the above "Second data transmission configuration status information".

[0308] The above processes can also be combined, such as...

[0309] Step 1-1: The second node sends the first request message to the third node.

[0310] Step 1-2: The third node sends the first response message to the second node.

[0311] Steps 1-3: The second node sends the first configuration message to the first node.

[0312] Step 1-4a: The second node sends a second request message to the third node.

[0313] Step 1-4b: The third node sends a second response message to the second node.

[0314] Steps 1-4: The second node sends the first notification message to the first node.

[0315] Furthermore, it is understood that the content contained in each message in the above embodiments is only an example of this disclosure. The content contained in various similar or identical messages may be replaced with each other, named with different names, or some items may be added or deleted as appropriate. In addition, for the sake of brevity, the meaning between similar content items can be interpreted in the context and will not be repeated. The modified and interpreted implementation methods are still within the scope of protection of this invention.

[0316] Figure 5 This is a block diagram of a node according to an exemplary embodiment of this disclosure. The structure and function of a node are illustrated here, but it should be understood that the illustrated structure and function are equally applicable to base stations, relay nodes, and user equipment. References Figure 5Node 500 includes a transceiver 510, a controller 520, and a memory 530. Under the control of the controller 520 (which may be implemented as one or more processors), node 500 (including transceiver 510 and memory 530) is configured to perform the operations of the node described herein. Although transceiver 510, controller 520, and memory 530 are shown as separate entities, they can be implemented as a single entity, such as a single chip. Transceiver 510, controller 520, and memory 530 can be electrically connected or coupled to each other. Transceiver 510 can send signals to and receive signals from other network entities, such as another node and / or UE, etc. In one embodiment, transceiver 510 may be omitted. In this case, controller 520 may be configured to execute instructions (including computer programs) stored in memory 530 to control the overall operation of node 500, thereby implementing the operations of the node described herein.

[0317] According to some embodiments, the user equipment described in this disclosure may include: cellular or other communication devices having a single-line display, a multi-line display, or a cellular or other communication device without a multi-line display; a PCS (Personal Communications Service) that may combine voice, data processing, fax, and / or data communication capabilities; a PDA (Personal Digital Assistant) that may include a radio frequency receiver, pager, Internet / intranet access, web browser, notepad, calendar, and / or GPS (Global Positioning System) receiver; and conventional laptop and / or handheld computers or other devices having and / or including a radio frequency receiver. As used herein, "terminal" or "terminal device" may be portable, transportable, installed in a means of transportation (air, sea, and / or land), or suitable and / or configured to operate locally, and / or in a distributed manner, operating in any other location on Earth and / or in space. The term "terminal" or "terminal device" used here can also refer to communication terminals, internet access terminals, or music / video playback terminals. For example, it can be a PDA, a MID (Mobile Internet Device), and / or a mobile phone with music / video playback capabilities, or a smart TV, a set-top box, or other similar devices.

[0318] Those skilled in the art will recognize that this disclosure can be implemented in other specific forms without altering the technical concept or essential features of this disclosure. Therefore, it should be understood that the above embodiments are merely examples and not limiting. The scope of this disclosure is defined by the appended claims, not by the detailed description. Therefore, it should be understood that all modifications or variations derived from the meaning and scope of the appended claims and their equivalents are within the scope of this disclosure.

[0319] In the embodiments described above, all operations and messages may be selectively performed or omitted. Furthermore, the operations in each embodiment do not need to be performed sequentially, and the order of operations can vary. Messages do not need to be transmitted in order, and the transmission order of messages may vary. Each operation and each message transmission can be performed independently.

[0320] Although this disclosure has been shown and described with reference to various embodiments thereof, those skilled in the art will understand that various changes in form and detail may be made without departing from the spirit and scope of this disclosure as defined by the appended claims and their equivalents.

Claims

1. A method executed by a first node in a communication system, the method comprising: The third message is received from the second node, which contains the first configuration information of the first target cell or the first candidate cell required when the first node performs cell handover or cell change. The first node receives a fourth message, which includes indication information indicating candidate configuration, first information related to timing advance required for the first node to access the first target cell or the first candidate cell, and at least one of the following: second configuration information for updating the first configuration information, and indication information for updating the configuration of the serving cell of the first node.

2. The method according to claim 1, wherein, The first information associated with the timing advance includes at least one of the following: The first timing advance information used by the first node when sending uplink signals. The seventh timing advance validity time is used to indicate the validity time of the first timing advance information. Indication information used to indicate the timing advance group associated with the first timing advance information. Identification information used to indicate the timing advance group associated with the first timing advance information. Identification information used to indicate the transmission control indication status associated with the first timing advance information.

3. The method according to claim 1, wherein, The second configuration information used to update the first configuration information includes at least one of the following: The first identifier information indicates the configuration that the first node needs to apply. Secondary information indicating the activation and deactivation status of at least one cell. Third information indicating the configuration of uplink control information for at least one cell when serving the first node. Fourth information indicating the configuration of uplink resources for at least one cell when serving the first node. Fifth information indicating the configuration of data transmission in at least one cell while serving the first node; and The indication information for updating the configuration of the serving cell of the first node includes at least one of the following: The sixth piece of information indicates the activation and deactivation status of at least one of the serving cells. The seventh piece of information indicating the configuration of uplink control information for at least one of the serving cells. The eighth piece of information indicating the configuration of uplink resources for at least one of the serving cells. The ninth piece of information indicating the configuration of data transmission for at least one of the serving cells.

4. The method according to claims 1 and 2, wherein, Also includes: Start the timer associated with the timing advance group to which the first cell, identified by the identification information of the first cell, belongs. The system receives a message from the second node indicating a switch to a second cell different from the first cell, or learns that the conditions for switching to the second cell have been met. If the timer is still running and the second cell belongs to the same timing advance group as the first cell, or if the timing advance group of the second cell is the same as the timing advance group of the first cell, the second cell is accessed through a process that does not require random access based on the first timing advance information.

5. The method according to claim 1, wherein, Also includes: The third message is sent by the second node after receiving the second message from the third node, which contains the configuration information of the second target cell or the second candidate cell. The second message includes at least one of the following: Information related to the cells configured by the third node for the first node. Information related to the data transmission configured by the third node for the first node. Information related to the candidate configurations prepared by the third node for the first node. Information related to the timing advance group to which the cell configured by the third node belongs to the first node. Information relating to the configuration that the first node can change during cell change or cell handover.

6. The method according to claim 1, wherein, Also includes: The fourth message is sent by the second node after receiving the sixth message from the third node, which is used to update the configuration information of the first node. The sixth message includes at least one of the following: The signage information for the third residential area, Information related to the timing advance of the third cell, Information used to update the activation status of at least one (candidate) cell configured by the third node. Information used to update the uplink control information of at least one (candidate) cell configured by the third node. Information used to update the uplink resource configuration of at least one (candidate) cell configured by the third node. Information used to update the configuration of data transmission for at least one (candidate) cell of the third node configuration.

7. A method performed by a second node in a communication system, the method comprising: Send a third message to the first node, the third message containing the first configuration information of the first target cell or the first candidate cell required when the first node performs cell handover or cell change; A fourth message is sent to the first node, the fourth message including indication information indicating candidate configuration, first information related to timing advance required for the first node to access the first target cell or the first candidate cell, and at least one of the following: second configuration information for updating the first configuration information, and indication information for updating the configuration of the serving cell of the first node.

8. The method according to claim 7, wherein, The first information associated with the timing advance includes at least one of the following: The first timing advance information used by the first node when sending uplink signals. The seventh timing advance validity time is used to indicate the validity time of the first timing advance information. Indication information used to indicate the timing advance group associated with the first timing advance information. Identification information used to indicate the timing advance group associated with the first timing advance information. Identification information used to indicate the transmission control indication status associated with the first timing advance information.

9. The method according to claim 7, wherein, The second configuration information used to update the first configuration information includes at least one of the following: The first identifier information indicates the configuration that the first node needs to apply. Secondary information indicating the activation and deactivation status of at least one cell. Third information indicating the configuration of uplink control information for at least one cell when serving the first node. Fourth information indicating the configuration of uplink resources for at least one cell when serving the first node. Fifth information indicating the configuration of data transmission in at least one cell when serving the first node; as well as, The indication information for updating the configuration of the serving cell of the first node includes at least one of the following: The sixth piece of information indicates the activation and deactivation status of at least one of the serving cells. The seventh piece of information indicating the configuration of uplink control information for at least one of the serving cells. The eighth piece of information indicating the configuration of uplink resources for at least one of the serving cells. The ninth piece of information indicating the configuration of data transmission for at least one of the serving cells.

10. The method of claim 7, further comprising: Receive a second message containing configuration information for the second target cell or the second candidate cell from the third node. The second message includes at least one of the following: Information related to the cells configured by the third node for the first node. Information related to the data transmission configured by the third node for the first node. Information related to the candidate configurations prepared by the third node for the first node. Information related to the timing advance group to which the cell configured by the third node belongs to the first node. Information relating to the configuration that the first node can change during cell change or cell handover.

11. The method of claim 7, further comprising: Receive a sixth message from the third node for updating the configuration information of the first node. The sixth message includes at least one of the following: The signage information for the third residential area, Information related to the timing advance of the third cell, Information used to update the activation status of at least one (candidate) cell configured by the third node. Information used to update the uplink control information of at least one (candidate) cell configured by the third node. Information used to update the uplink resource configuration of at least one (candidate) cell configured by the third node. Information used to update the configuration of data transmission for at least one (candidate) cell of the third node configuration.

12. A method performed by a third node in a communication system, the method comprising: Send a second message containing configuration information of the second target cell or the second candidate cell to the second node; Send a sixth message to the second node to update the configuration information of the first node; The second message includes at least one of the following: Information related to the cells configured by the third node for the first node. Information related to the data transmission configured by the third node for the first node. Information related to the candidate configurations prepared by the third node for the first node. Information related to the timing advance group to which the cell configured by the third node belongs to the first node. Information relating to the configuration that the first node can change during cell change or cell handover.

13. The method according to claim 12, wherein, The sixth message includes at least one of the following: The signage information for the third residential area, Information related to the timing advance of the third cell, Information used to update the activation status of at least one (candidate) cell configured by the third node. Information used to update the uplink control information of at least one (candidate) cell configured by the third node. Information used to update the uplink resource configuration of at least one (candidate) cell configured by the third node. Information used to update the configuration of data transmission for at least one (candidate) cell of the third node configuration.

14. A node device, the node device comprising: A transceiver is configured to send and receive signals from external sources; as well as The controller is configured to control the transceiver to perform the method according to any one of claims 1-19.

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