CN116506866A - Mechanism for node movement and corresponding node - Google Patents
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- H—ELECTRICITY
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- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
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- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/24—Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service]
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- H04W36/0055—Transmission or use of information for re-establishing the radio link
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- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/042—Public Land Mobile systems, e.g. cellular systems
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Abstract
The application provides a method in a communication system, comprising: at least one of the following is transmitted: candidate information related to cell selection, first data configuration information, update configuration indication information, and/or receiving at least one of: auxiliary information related to cell selection, second data configuration information, and third information related to configuration.
Description
Technical Field
The present application relates to the field of wireless communications, and more particularly, to mechanisms for node movement and related nodes.
Background
In order to meet the increasing demand for wireless data communication services since the deployment of 4G communication systems, efforts have been made to develop improved 5G or quasi 5G communication systems. Therefore, a 5G or quasi 5G communication system is also referred to as a "super 4G network" or a "LTE-after-system".
Wireless communication is one of the most successful innovations in modern history. Recently, the number of subscribers to wireless communication services exceeds 50 billion and continues to grow rapidly. As smartphones and other mobile data devices (e.g., tablet computers, notebook computers, netbooks, e-book readers, and machine type devices) become increasingly popular among consumers and businesses, the demand for wireless data services is rapidly growing. To meet the high-speed growth of mobile data services and support new applications and deployments, it is important to improve the efficiency and coverage of the wireless interface.
Disclosure of Invention
According to an embodiment of the present disclosure, there is provided a method performed by a first network node in a communication system, comprising: transmitting to the second network node at least one of: candidate information related to cell selection, first data configuration information, update configuration indication information, and/or receiving at least one of the following from the second network node: auxiliary information related to cell selection, second data configuration information, and third information related to configuration.
In one embodiment, wherein: the first data configuration information is at least one of the following:
data configuration update request information, which is information for notifying the second network node of data requesting update of the configuration,
information of the data to be serviced,
the information of the data to be newly created,
the second data configuration information is at least one of the following:
information of the data to be admitted to the server,
the information of the data that is rejected,
information of the data to be configured,
the information of the data to be newly created that is admitted,
rejected information of data to be newly created.
In one embodiment, wherein:
the information of the data includes at least one of:
The identification information of the data is used to identify,
quality of service QoS information of the data,
an indication of the type of data,
the address information is used to determine the address information,
identification information of the backhaul link channel is input,
the identification information of the backhaul link channel is output,
the route identification information is entered and the route information is transmitted,
the route identification information is output and the route information is received,
packet header indication information for indicating information to be added in the packet header.
In one embodiment, wherein:
the data identified by the identification information of the data includes at least one of the following types:
the data on one or more of the bearers,
the data on one or more of the tunnels,
control signaling of the F1 interface,
control signaling associated with the user of the F1 interface,
the F1 interface is not user-associated control signaling,
user plane data of the F1 interface,
data of the non-F1 interface,
data on the association of one or more transport network layers TNL,
the type indicated by the indication information of the data type comprises at least one of the following types:
control signaling of the F1 interface,
control signaling associated with the user of the F1 interface,
the F1 interface is not user-associated control signaling,
user plane data of the F1 interface,
data of the non-F1 interface.
In one embodiment, wherein:
The candidate information related to cell selection includes at least one of:
the identity information of the target node is used,
information of the candidate serving node(s),
the identity information of the target cell is stored,
the information of the candidate cell is used to determine,
the update configuration indication information includes at least one of:
an indication of the change in configuration is provided,
configuration update information, including updated configuration information,
the access information is provided to the user by means of a network,
the node configuration information is used to determine,
the group update indication information is provided to the user,
the data transmission configuration information is provided in the form of a data transmission configuration information,
the indication of the migration is requested and,
the identity information of the target node is used,
the information of the data to be migrated,
the configuration indication information includes at least one of:
the first interface information is provided in the form of a first interface information,
first information of the connection node including at least one of identification information and address information of the connection node connected to the node,
the service area indication information is used to indicate,
the request information of the migration method is provided,
the assistance information related to cell selection comprises at least one of:
the node configuration information is used to determine,
the identity information of the serving node is used,
the identity information of the serving cell is used,
information of the optional service node(s),
information of the selected cell(s),
the third information related to configuration includes at least one of:
The second interface information is used to provide a second interface information,
reply information of the migration method.
In one embodiment, the service area includes one or more nodes or includes one or more cells, and the nodes included in the service area or the nodes to which the cells belong can interact to configure data transmission of another node.
In one embodiment, wherein:
the information of the candidate cell includes at least one of:
the identity information of the cell(s),
the measurement result information of the cell is used,
information on the load of the cell(s),
the identity information of the base station where the cell is located,
the indication of the configuration change includes at least one of:
the indication of the change of the node,
transmitting the indication information of the reconfiguration,
the request indication information of the reconfiguration is transmitted,
transmitting indication information of the reconfigured data,
the configuration update information includes at least one of:
address information of a distribution unit of the base station,
the address information of the parent node is used,
the access information includes at least one of:
the identity information of the cell(s),
the identity information of the serving node is used,
the node configuration information, the first interface information, or the second interface information is used to indicate identification information of a node, and includes at least one of:
The identification information of the node on the non-relevant interface,
the identification information of the node where the non-relevant interface is located,
the identification information of the node on the relevant interface,
the identification information of the node where the relevant interface is located,
identification information of the node for data transmission configuration interactions,
the user identification information of the cell is used,
the identity information of the serving cell is used,
the group update indication information includes at least one of:
the adaptation layer address updates the information,
the transport layer address updates information and,
the backhaul link channel update information is input,
the backhaul link channel update information is output,
the route identification update information is entered and,
the route identification update information is output and,
the header of the packet indicates the update information,
the data transmission configuration information includes at least one of:
header indication information, indicating information to be added in the header,
the information of the IP address of the internet protocol,
the information of the data to be migrated includes at least one of the following:
an indication of the data stream is provided,
the indication information of the tunnel is provided to the user,
the identification information of the bearer is provided,
the address information of the transport layer is transmitted,
the identification information of the route is transmitted,
the address information of the adaptation layer,
In one embodiment, wherein:
the indication information of the transmission of the reconfigured data includes at least one of:
indication information of the data stream, identification information of the data stream to which the data requiring reconfiguration belongs,
the indication information of the tunnel is provided to the user,
transmitting the indication information of the network layer associated TNL association,
the identification information of the bearer is provided,
the address information of the transport layer is transmitted,
the identification information of the route is transmitted,
address information of the adaptation layer.
In one embodiment, the first network node is one of a first node serving as a relay node, a second node interfacing with the first node, a third node performing Radio Resource Control (RRC) connection with the first node, and a fourth node performing RRC connection with the first node, and
the second network node is a different one of the first node, the second node, the third node, and the fourth node than the first network node.
According to an embodiment of the present disclosure, there is provided a method performed by a second network node in a communication system, comprising:
receiving from a first network node at least one of: candidate information related to cell selection, first data configuration information, update configuration indication information, and/or
Transmitting to the first network node at least one of: auxiliary information related to cell selection, second data configuration information, and third information related to configuration.
In one embodiment, wherein:
the first data configuration information is at least one of the following:
data configuration update request information, which is information for notifying the second network node of data requesting update of the configuration,
information of the data to be serviced,
the information of the data to be newly created,
the second data configuration information is at least one of the following:
information of the data to be admitted to the server,
the information of the data that is rejected,
information of the data to be configured,
the information of the data to be newly created that is admitted,
rejected information of data to be newly created.
In one embodiment, wherein:
the information of the data includes at least one of:
the identification information of the data is used to identify,
quality of service QoS information of the data,
an indication of the type of data,
the address information is used to determine the address information,
identification information of the backhaul link channel is input,
the identification information of the backhaul link channel is output,
the route identification information is entered and the route information is transmitted,
the route identification information is output and the route information is received,
packet header indication information for indicating information to be added in the packet header.
In one embodiment, wherein:
the data identified by the identification information of the data includes at least one of the following types:
the data on one or more of the bearers,
the data on one or more of the tunnels,
control signaling of the F1 interface,
control signaling associated with the user of the F1 interface,
the F1 interface is not user-associated control signaling,
user plane data of the F1 interface,
data of the non-F1 interface,
data on the association of one or more transport network layers TNL,
the type indicated by the indication information of the data type comprises at least one of the following types:
control signaling of the F1 interface,
control signaling associated with the user of the F1 interface,
the F1 interface is not user-associated control signaling,
user plane data of the F1 interface,
data of the non-F1 interface.
In one embodiment, wherein:
the candidate information related to cell selection includes at least one of:
the identity information of the target node is used,
information of the candidate serving node(s),
the identity information of the target cell is stored,
the information of the candidate cell is used to determine,
the update configuration indication information includes at least one of:
an indication of the change in configuration is provided,
configuration update information, including updated configuration information,
The access information is provided to the user by means of a network,
the node configuration information is used to determine,
the group update indication information is provided to the user,
the data transmission configuration information is provided in the form of a data transmission configuration information,
the indication of the migration is requested and,
the identity information of the target node is used,
the information of the data to be migrated,
the configuration indication information includes at least one of:
the first interface information is provided in the form of a first interface information,
first information of the connection node including at least one of identification information and address information of the connection node connected to the node,
the service area indication information is used to indicate,
the request information of the migration method is provided,
the assistance information related to cell selection comprises at least one of:
the node configuration information is used to determine,
the identity information of the serving node is used,
the identity information of the serving cell is used,
information of the optional service node(s),
information of the selected cell(s),
the third information related to configuration includes at least one of:
the second interface information is used to provide a second interface information,
reply information of the migration method.
In one embodiment, the service area includes one or more nodes or includes one or more cells, and the nodes included in the service area or the nodes to which the cells belong can interact to configure data transmission of another node.
In one embodiment, wherein:
the information of the candidate cell includes at least one of:
the identity information of the cell(s),
the measurement result information of the cell is used,
information on the load of the cell(s),
the identity information of the base station where the cell is located,
the indication of the configuration change includes at least one of:
the indication of the change of the node,
transmitting the indication information of the reconfiguration,
the request indication information of the reconfiguration is transmitted,
transmitting indication information of the reconfigured data,
the configuration update information includes at least one of:
address information of a distribution unit of the base station,
the address information of the parent node is used,
the access information includes at least one of:
the identity information of the cell(s),
the identity information of the serving node is used,
the node configuration information, the first interface information, or the second interface information is used to indicate identification information of a node, and includes at least one of:
the identification information of the node on the non-relevant interface,
the identification information of the node where the non-relevant interface is located,
the identification information of the node on the relevant interface,
the identification information of the node where the relevant interface is located,
Identification information of the node for data transmission configuration interactions,
the user identification information of the cell is used,
the identity information of the serving cell is used,
the group update indication information includes at least one of:
the adaptation layer address updates the information,
the transport layer address updates information and,
the backhaul link channel update information is input,
the backhaul link channel update information is output,
the route identification update information is entered and,
the route identification update information is output and,
the header of the packet indicates the update information,
the data transmission configuration information includes at least one of:
header indication information, indicating information to be added in the header,
the IP address information is used to determine,
the information of the data to be migrated includes at least one of the following:
an indication of the data stream is provided,
the indication information of the tunnel is provided to the user,
the identification information of the bearer is provided,
the address information of the transport layer is transmitted,
the identification information of the route is transmitted,
address information of the adaptation layer.
In one embodiment, wherein:
the indication information of the transmission of the reconfigured data includes at least one of:
indication information of the data stream, identification information of the data stream to which the data requiring reconfiguration belongs,
The indication information of the tunnel is provided to the user,
transmitting the indication information of the network layer associated TNL association,
the identification information of the bearer is provided,
the address information of the transport layer is transmitted,
the identification information of the route is transmitted,
address information of the adaptation layer.
In one embodiment, the first network node is one of a first node serving as a relay node, a second node interfacing with the first node, a third node RRC-connected with the first node, and a fourth node RRC-connected with the first node, an
The second network node is a different one of the first node, the second node, the third node, and the fourth node than the first network node.
According to an embodiment of the present disclosure, there is provided a first network node in a communication system, comprising: a transceiver; and a processor coupled with the transceiver and configured to perform any of the methods according to embodiments of the present disclosure.
According to an embodiment of the present disclosure, there is provided a second network node in a communication system, comprising: a transceiver; and a processor coupled with the transceiver and configured to perform any of the methods according to embodiments of the present disclosure.
Drawings
FIG. 1 is an example of an exemplary system architecture;
FIG. 2 is an exemplary system architecture according to various embodiments of the present disclosure;
fig. 3 is an example of a base station structure;
fig. 4 is an example of a relay network;
FIG. 5 is an example of cross-topology data transmission;
FIG. 6 is an example of a scenario;
fig. 7 is a first flow Cheng Shili;
fig. 8 is a second flow Cheng Shili;
FIG. 9 is a third flow Cheng Shili;
FIG. 10 is a fourth flow example;
fig. 11 is a fifth flow example;
fig. 12 is a sixth flow example;
fig. 13 is a seventh flowchart example;
fig. 14 is an eighth flowchart example; and
fig. 15 is a schematic block diagram of a node according to an embodiment of the present disclosure.
Detailed Description
The following description with reference to the accompanying drawings is provided to facilitate a thorough understanding of the various embodiments of the present disclosure as defined by the claims and their equivalents. The description includes various specific details to facilitate understanding but should be considered exemplary only. Accordingly, one of ordinary skill in the art will recognize that various changes and modifications of the various embodiments described herein can be made without departing from the scope and spirit of the present disclosure. In addition, descriptions of well-known functions and constructions may be omitted for clarity and conciseness.
The terms and phrases used in the following specification and claims are not limited to their dictionary meanings, but are used only by the inventors to enable a clear and consistent understanding of the disclosure. Accordingly, it should be apparent to those skilled in the art that the following descriptions of the various embodiments of the present disclosure are provided for illustration only and not for the purpose of limiting the disclosure as defined by the appended claims and their equivalents.
It should be understood that the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "a component surface" includes reference to one or more such surfaces.
The terms "comprises" or "comprising" may refer to the presence of a corresponding disclosed function, operation or component that may be used in various embodiments of the present disclosure, rather than to the presence of one or more additional functions, operations or features. Furthermore, the terms "comprises" or "comprising" may be interpreted as referring to certain features, numbers, steps, operations, constituent elements, components, or combinations thereof, but should not be interpreted as excluding the existence of one or more other features, numbers, steps, operations, constituent elements, components, or combinations thereof.
The term "or" as used in the various embodiments of the present disclosure includes any listed term and all combinations thereof. For example, "a or B" may include a, may include B, or may include both a and B.
Unless defined differently, all terms (including technical or scientific terms) used in this disclosure have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains. The general terms as defined in the dictionary are to be construed to have meanings consistent with the context in the relevant technical field, and should not be interpreted in an idealized or overly formal manner unless expressly so defined in the present disclosure.
Figures 1 through 15, discussed below, and the various embodiments used to describe the principles of the present disclosure in this patent document are by way of illustration only and should not be construed in any way to limit the scope of the disclosure. Those skilled in the art will appreciate that the principles of the present disclosure may be implemented in any suitably arranged system or device.
Fig. 1 is an exemplary system architecture 100 for System Architecture Evolution (SAE). A User Equipment (UE) 101 is a terminal device for receiving data. An evolved universal terrestrial radio access network (E-UTRAN) 102 is a radio access network including macro base stations (enodebs/nodebs) providing an access radio network interface for UEs. The Mobility Management Entity (MME) 103 is responsible for managing the UE's mobility context, session context and security information. Serving Gateway (SGW) 104 mainly provides the functions of the user plane, and MME 103 and SGW 104 may be in the same physical entity. The packet data network gateway (PGW) 105 is responsible for charging, lawful interception, etc. functions, and may also be in the same physical entity as the SGW 104. A Policy and Charging Rules Function (PCRF) 106 provides quality of service (QoS) policies and charging criteria. The general packet radio service support node (SGSN) 108 is a network node device in the Universal Mobile Telecommunications System (UMTS) that provides a route for the transmission of data. A Home Subscriber Server (HSS) 109 is a home subsystem of the UE and is responsible for protecting user information including the current location of the user equipment, the address of the service node, user security information, packet data context of the user equipment, etc.
Fig. 2 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 this disclosure.
A User Equipment (UE) 201 is a terminal device for receiving data. The next generation radio access network (NG-RAN) 202 is a radio access network including base stations (gnbs or enbs connected to a 5G core network 5GC, also called NG-gnbs) providing access radio network interfaces for UEs. An access control and mobility management function (AMF) 203 is responsible for managing the mobility context of the UE, and security information. The User Plane Function (UPF) 204 mainly provides the functions of the user plane. The session management function entity SMF205 is responsible for session management. The Data Network (DN) 206 contains services such as operators, access to the internet, and third party traffic, among others.
In NR (New Radio access), in order to extend the coverage of the network, a relay network architecture, IAB (Integrated Access and Backhaul), is proposed. The architecture introduces an anchor node (donor/anchor node) and a relay node (e.g., IAB node). The anchor node may be a stand-alone base station or a base station consisting of a centralized unit CU (IAB-donor central unit) and a distributed unit DU (IAB-donor distributed unit). The relay node comprises a mobile terminal function (Mobile terminal function) for communicating with a node at a higher level of the relay node and a distribution unit function (Distributed terminal function) (in another example, it may also be described that the relay node comprises a mobile terminal part and a distribution unit part) for communicating with a node at a lower level of the relay node, and the distribution unit part establishes a connection with the anchor node and serves users accessing the distribution unit part. The network comprising IAB nodes is a relay network and current research is beginning to consider the movement of relay nodes in order to further extend the coverage of the network, e.g. to deploy a relay node on a vehicle in order to let the relay node serve subscribers on the vehicle.
In an NR system, to support network function virtualization, more efficient resource management and scheduling, a base station (gNB/ng-eNB) providing a wireless network interface for a terminal (UE) can be further divided into a centralized unit gNB-CU/ng-eNB-CU (gNB central unit/ng-eNB central unit) and a distributed unit gNB-DU/ng-eNB-DU (gNB distributed unit/ng-eNB distributed unit) (abbreviated CU and DU in the present invention), as shown in FIG. 3 (a). The gNB-CU has Radio Resource Control (RRC), service data adaptation protocol (SDAP: service Data Adaptation Protocol), packet Data Convergence Protocol (PDCP) protocol layers, etc., and the ng-eNB-CU has RRC, PDCP layers. The gNB-DU/ng-eNB-DU has a radio link control protocol (RLC), medium Access Control (MAC), physical layer, etc. A standardized public interface F1 is arranged between the gNB-CU and the gNB-DU, and a standardized public interface W1 is arranged between the ng-eNB-CU and the ng-eNB-DU. The F1 interface is divided into a control plane F1-C and a user plane F1-U. The transport network layer of F1-C is based on IP transport. For more reliable signaling transmission, SCTP protocols are added over IP. The protocol of the application layer is F1AP, see 3gpp ts38.473.SCTP may provide reliable application layer messaging. The transport layer of F1-U is UDP/IP, and GTP-U is used to carry user plane protocol data units PDU above UDP/IP. Further, as shown in fig. 3 (b), for the gNB-CU, the gNB-CU may include a gNB-CU-CP (control plane part of a centralized unit of a base station) and a gNB-CU-UP (user plane part of a centralized unit of a base station), where the gNB-CU-CP includes functions of a control plane of the base station, has RRC and PDCP protocol layers, and the gNB-CU-UP includes functions of a user plane of the base station, has SDAP and PDCP protocol layers. Between the gNB-CU-CP and the gNB-CU-UP is a standardized public interface E1, the protocol is E1AP, see 3GPP TS38.463. The interface between the control plane part of the central unit of the base station and the distribution unit of the base station is an F1-C interface, namely an F1 control plane interface, and the interface between the user plane part of the central unit of the base station and the distribution unit of the base station is an F1-U interface, namely an F1 user plane interface. In addition, in the NR system, a base station providing the E-UTRA user plane and the control plane, which accesses the 5G core network, is called a ng-eNB, and in order to support virtualization, such a base station (ng-eNB) may be further divided into a centralized unit ng-eNB-CU (gNB central unit/ng-eNB central unit) and a distributed unit ng-eNB-DU (gNB distributed unit/ng-eNB distributed unit) (abbreviated CU and DU in the present invention) as shown in fig. 3 (c). The ng-eNB-CU has an RRC, PDCP layer. The gNB-DU/ng-eNB-DU has a radio link control protocol (RLC), medium Access Control (MAC), physical layer, etc. Between the ng-eNB-CU and the ng-eNB-DU is a standardized public interface W1. The W1 interface is divided into a control plane W1-C and a user plane W1-U. The transport network layer of W1-C is based on IP transport. For more reliable signaling transmission, SCTP protocols are added over IP. The protocol of the application layer is W1AP, see 3gpp ts 37.473. The transport layer of the W1-U is UDP/IP, and the GTP-U is used for bearing user plane protocol data units PDU above UDP/IP.
Fig. 4 shows a schematic architecture of a multi-hop relay network (IAB network), in which a network architecture comprising an anchor node (e.g. IAB node/anchor) and two relay nodes (e.g. IAB node, IAB node) is shown. Users in the multi-hop network can access the network through the anchor node or the distribution unit of the anchor node or the relay node, for example, the users 1/2/3 respectively access the relay network through the distribution unit of the anchor node, the distribution unit part of the relay node 1 and the distribution unit part of the relay node 2. The mobile terminal function of the relay node is used to communicate with a node at a higher level of the relay node (e.g., the mobile terminal part of the relay node 1 is used to communicate with the anchor node or the distribution unit of the anchor node, the mobile terminal part of the relay node 2 is used to communicate with the distribution unit part of the relay node 1), and the distribution unit part of the relay node is used to communicate with a node at a lower level of the relay node (e.g., the distribution unit part of the relay node 1 is used to communicate with the user 2, or may be used to communicate with the mobile terminal part of the relay node 2). The mobile terminal part of the relay node can be regarded as a user accessing the network, and thus has the function of a normal user (not a relay node) (e.g., the mobile terminal part can establish an SRB with its upper node to send RRC messages, and can also establish DRB to send data). The centralized unit of the anchor node includes the protocol stacks: the protocol stack of the service control plane includes a Radio Resource Control (RRC) protocol layer and a Packet Data Convergence Protocol (PDCP) layer, and the protocol stack of the service user plane includes a service data adaptation protocol (SDAP: service Data Adaptation Protocol) layer and a PDCP layer. The distribution unit of the anchor node or the distribution unit part of the relay node includes a protocol stack including: the protocol stacks of the service control plane and the user plane include a Radio Link Control (RLC) protocol layer, a Medium Access Control (MAC) protocol layer, and a physical layer (PHY). The interfaces between the concentration unit of the anchor node and the distribution unit of the anchor node, and between the concentration unit of the anchor node and the distribution unit of the relay node are F1 interfaces (see 3gpp ts 38.473).
In the relay network, a link between the relay node and the anchor node or the distribution unit of the anchor node is a Backhaul link (Backhaul link), and one or more different Backhaul link channels (Backhaul channels) are established on the Backhaul link, such as Backhaul link channel 1 and Backhaul link channel 2 in fig. 4. An example of a backhaul link channel is a backhaul link radio link control protocol layer (RLC: radio Link Control) channel, backhaul RLC channel. In a relay network, each backhaul link channel may be used to transmit data packets belonging to the same user or different users. The data packet may be a data packet of a user data radio bearer (DRB: data Radio Bearer), a data packet of a user signaling radio bearer (SRB: signaling Radio Bearer), a data packet of a control plane on an F1 interface, a data packet of a user plane on an F1 interface, or a data packet of a non-F1 interface (such as an IPSec data packet, a data packet of an SCTP protocol, a data packet of OAM, etc.).
In order to achieve transmission of user data in a multi-hop relay network, 3GPP defines a new protocol layer, i.e. a backhaul adaptation protocol layer (BAP: backhaul Adaptation layer), which is configured in the distribution unit of the anchor node and the relay node (e.g. the mobile terminal part of the relay node and/or the distribution unit part of the relay node), above the RLC layer, and mainly functions in routing of data packets and mapping of data packets. In order to perform the transmission of the user data between the relay node and the anchor node, the configuration of the backhaul link and the configuration of the F1 interface between the distribution unit portion of the relay node and the anchor node need to be completed, and these configurations include, but are not limited to, types such as BAP address, route configuration (such as route identification information indicating different transmission routes, including BAP address and path identification of the destination receiving node in this information), configuration of the backhaul link channel, configuration of the tunnel, configuration of the backhaul link for the tunnel, and the like.
After the NR enters the relay network, a scenario when the relay node is fixed is mainly considered. However, as the research is further developed, the latest research has begun to consider the movement of relay nodes. During the movement, the relay node needs to frequently replace the connected anchor node. Because many users may be accessed under the relay node, such movement necessarily causes a large signaling overhead, and also interrupts the transmission of user data. In order to solve this problem, there has been a scheme in which a distribution unit portion of a relay node is connected to the same anchor node, and a mobile terminal portion of the relay node makes a change of a serving cell. This can eliminate the signaling overhead associated with the distributed element portion and reduce the time of data interruption. However, this method is still given without the relay node moving. This approach may lead to the possibility that the data transmission of the relay node is not configurable after the movement of the relay node. This is because the change of the serving cell of the mobile terminal of the relay node and the control of the distribution unit of the relay node are managed by two different entities. In this way, the mobile terminal part of the relay node is moved to a node unknown to the node to which the distribution unit of the relay node is connected, and thus the data transmission of the relay node cannot be configured. The invention aims to solve the technical problem of ensuring continuous data transmission between the distributed unit part of the relay node and the centralized unit part of the connected anchor node in the moving process of the relay node.
Exemplary embodiments of the present disclosure are further described below with reference to the accompanying drawings.
The text and drawings are provided as examples only to aid in the understanding of the present disclosure. They should not be construed as limiting the scope of the disclosure in any way. While certain embodiments and examples have been provided, it will be apparent to those of ordinary skill in the art from this disclosure that variations can be made to the embodiments and examples shown without departing from the scope of the disclosure.
Before introducing the specific content, some assumptions and some definitions of the invention are given below.
■ The message names are only examples, and other message names can be used.
■ The inclusion of "first", "second", etc. in the message names of the present invention is merely an example of a message and does not represent an order of execution
■ The detailed description of the steps irrelevant to the present invention is omitted in the present invention.
■ In the present invention, the steps in each flow may be performed in combination with each other or may be performed separately. The execution steps of the flows are examples only and do not exclude other possible execution orders.
■ In the present invention, the base station may be a 5G base station (such as a gNB, ng-eNB), or may be a 4G base station (such as an eNB), or may be another type of access node.
■ In the present invention, transmission of data refers to reception or transmission of data.
■ In the present invention, uplink data refers to data transmitted from a relay node to a base station (anchor node), and downlink data refers to data transmitted from a base station (anchor node) to a relay node
■ In the present invention, the structure of the relay node referred to in the scheme description is a structure including a mobile terminal part and a distribution unit part, and an interface of the distribution unit part of the relay node and an anchor node (or a centralized unit part of the anchor node) is an F1 interface. The scheme of the invention is applicable to relay nodes of other structures, and in one embodiment, another possible structure of a relay node is that it includes a mobile terminal part and a base station part, and an interface of the base station part and an anchor node (or a centralized unit part of the anchor node) is an Xn/X2 interface.
■ In the present invention, a PCell (primary cell) is a cell serving a node when the node is in a single connection (remains connected to only one node or distribution unit), and a PSCell (primary secondary cell) is a cell serving the node when the node is in a dual connection.
The node related to the invention comprises:
■ The first node: the relay node comprises two parts, a first part is used for the relay node to access the network, a first entity called a first node, and a second part is used for serving other users, and a second entity called the first node. In one example, the relay node is an IAB node, i.e. comprising an MT part and a DU part, the first entity of the first node is the MT part and the second entity of the first node is the DU part, and in another embodiment, the relay node is a node with base station functionality, i.e. comprising an MT part and a base station part, the first entity of the first node is the MT part and the second entity of the first node is the base station part.
■ And a second node: the base station, or a centralized unit of base stations, or a control plane portion of a centralized unit of base stations, to which the second node is directed is a node to which the first node is connected, in one embodiment the second node is a node that establishes an RRC connection with the first node (or a first entity of the first node), in another embodiment the second node is a node that establishes an interface (e.g., an F1 interface, an Xn/X2 interface) with the first node (a second entity of the first node), and in another embodiment the second node is a node that establishes both an interface and an RRC connection with the first node. Specifically, the second node may be an anchor node of the first node, or may be a node with an anchor node function
■ Third node: the base station, or a centralized unit of base stations, or a control plane portion of a centralized unit of base stations, to which the third node is directed is a node to which the first node is connected, in one embodiment the third node is a node that establishes an RRC connection with the first node (or a first entity of the first node), in another embodiment the third node is a node that establishes an interface (e.g., an F1 interface, an Xn/X2 interface) with the first node (a second entity of the first node), and in another embodiment the third node is a node that establishes both an interface and an RRC connection with the first node. Specifically, the third node may be an anchor node of the first node, or may be a node with an anchor node function
■ Fourth node: the base station, or a centralized unit of base stations, or a control plane portion of a centralized unit of base stations, the base station to which the fourth node is directed is a node to which the first node is connected, in one embodiment the fourth node is a node that establishes an RRC connection with the first node (or a first entity of the first node), in another embodiment the fourth node is a node that establishes an interface (e.g., an F1 interface, an Xn/X2 interface) with the first node (a second entity of the first node), and in another embodiment the fourth node is a node that establishes both an interface and an RRC connection with the first node. Specifically, the fourth node may be an anchor node of the first node, or may be a node with an anchor node function
In addition, the second node, the third node, and the fourth node may be different nodes, or any two of them may be the same node, or all three may be the same node. In the present invention, the second node may be referred to as an interface-termination (interface-termination) node, and the third node or the fourth node may be referred to as a non-interface-termination (non-interface-termination) node.
In the following description, taking an example that the first node is an IAB node, the interface established by the second entity of the first node is an F1 interface. The solution described in the present invention is applicable to other types of relay nodes, and the following description about the F1 interface is also applicable to other types of interfaces established by the second entity of the first node and the second node/third node/fourth node.
In a relay network, one possible connection is that the node to which the F1 interface of the relay node terminates is a different node than the node to which the RRC connection of the relay node terminates. As shown in fig. 5, the F1 interface of the first node (relay node) is terminated to the second node (the F1 interface is established between the first node and the second node), and the RRC connection of the first node is terminated to the first nodeThree nodes (RRC connection is established between the first node and the third node), and data transmission on the F1 connection and the RRC connection is performed through the cell controlled by the third node. The first node and the third node may be directly connected, or may be connected through one or more intermediate nodes (e.g., a distribution unit of a base station, or other relay nodes). In the present invention, this manner of data transmission may be referred to asCross-topology data transfer (inter-topology data transport) or cross-network data Conveying device: indicating that data transmission between two nodes needs to be performed in a network (or topology) managed by other nodes. As shown in fig. 5, the data transmission between the first node and the second node (e.g., the data transmission related to the F1 interface) needs to be performed in a network managed by the third node (i.e., a network between the third node and the first node, where the network may include one or more intermediate nodes, such as relay nodes). In order to complete the data transmission over the F1 interface, the third node needs to configure its communication link with the first node.
During the transmission of cross-topology data, the cells to which the first node is connected may change or increase, and the involved scenarios may include the following, as shown in fig. 6:
a) Scene one: cell change in a base station
The cell to which the first node is connected is changed, as shown in fig. 6 (a), the cell to which the first node is connected is changed from cell1 to cell 2, and both cell1 and cell 2 belong to the cell of the third node, which cells 1 and 2 can be regarded as PCell of the first node
b) Scene II: cell change between base stations
The cell to which the first node is connected is changed, as shown in fig. 6 (b), the cell to which the first node is connected is changed from cell1 to cell 2, and cell1 and cell 2 belong to a third node and a fourth node, respectively, which cells 1 and 2 can be regarded as PCell of the first node
c) Scene III: PSCell increase in base station
The cells accessed by the first node are increased, as shown in fig. 6 (c), and a new cell, such as PSCell1, is added to the first node by the third node, and the addition of the cell makes the first node establish dual connection with the nodes under the third node
d) Scene four: PSCell increase between base stations
The cells accessed by the first node are increased, as shown in fig. 6 (d), a new cell, such as PSCell1, is added to the first node by the third node, and the new cell is a cell under the fourth node, and the addition of the cell makes the first node establish dual connection with the third node and the fourth node
e) Scene five: PScell change in base station
The cell to which the first node is connected changes, and as shown in fig. 6 (e), the first node establishes dual connection with a different node under the third node, in which case the PSCell to which the first node is connected changes, and the new PSCell belongs to the cell controlled by the third node
f) Scene six: PSCell change between base stations
The cell to which the first node is connected changes, and as shown in fig. 6 (f), the first node establishes a dual connection with the third node and the fourth node, in which case the PSCell to which the first node is connected changes and the new PSCell belongs to the cell controlled by the fourth node
In the above scenario, the change or addition of the serving cell of the first node is performed by the third node, for example, in the first scenario and the second scenario, the third node initiates the cell change procedure, in the third scenario and the fourth scenario, the third node initiates the PSCell addition procedure, and in the fifth scenario and the sixth scenario, the third node initiates the PSCell change procedure. Such a change or addition of cells may result in a change of the configuration of the data transmission over the F1 interface between the first node and the second node, since the data transmission of the F1 interface of the first node and the second node is performed through the cell to which the first node has access. If the cells accessed by the first node belong to a third node, the data transmission of the F1 interface is required to be configured through the third node; if the cells accessed by the first node belong to the fourth node, the data transmission of the F1 interface is required to be configured through the fourth node; if the cell to which the first node is connected belongs to the third and fourth node respectively, the data transmission of the F1 interface needs to be configured by the third node and the fourth node, and further these configurations need to interact with the second node, since the second node is the receiver or sender of the data on the F1 interface and the second node needs to configure the first node according to these configurations.
In order to support the first node to perform the above cross-topology data transmission, configuration information interaction related to the data transmission of the first node needs to be performed between the base stations, and for convenience of description, the present invention defines data configuration information, that is:
data configuration informationThe information includes at least one of the following:
■ The identification information of the data, the information identifying the configured data, the identification information of the data stream, the identification of the tunnel, the identification of the bearer, the address information of the transport layer, the route identification information of the transport, the address information of the adaptation layer. The data identified by the identification information may be one or more of the following types:
■ Data on one or more bearers
■ Data over one or more tunnels
■ Control signaling of F1 interface
■ User-associated control signaling for F1 interface
■ F1 interface non-user associated control signaling
■ User plane data of F1 interface
■ Data of non-F1 interface
■ Data on association of one or more transport network layers (TNL: transport Network Layer)
■ QoS information for data
■ Indication information of the data type, the type indicated by the information may be one or more of the following types:
■ Control signaling of F1 interface
■ User-associated control signaling for F1 interface
■ F1 interface non-user associated control signaling
■ User plane data of F1 interface
■ Data of non-F1 interface
■ Address information indicating address information used for transmitting data, such as an IP address, an adaptation layer address, which in one embodiment is address information of the first node side
■ Inputting backhaul link channel identification information, e.g. Ingress BH RLC CH ID, indicating a backhaul link channel used by the first node for transmitting data to, in one embodiment, the uplink data is received by the first node, and in another embodiment, the downlink data is received by the first node
■ Outputting backhaul link channel identification information, e.g., egress BH RLC CH ID, indicating the backhaul link channel used when the first node transmits data, which in one embodiment is the channel used when the first node transmits downlink data, and in another embodiment is the channel used when the first node transmits uplink data
■ Inputting route identification information, such as Ingress BAP routing ID, which indicates a BAP routing ID included in the data received by the first node, where in one embodiment the information is a route to which the uplink data received by the first node belongs, and in another embodiment the information is a route to which the downlink data received by the first node belongs, and the information is possibly included in the downlink data packet;
■ Outputting route identification information, such as Egress BAP routing ID, which indicates a BAP routing ID added to the data when the first node transmits the data, which in one embodiment is a route to which the upstream data transmitted by the first node belongs, which in another embodiment is a route to which the downstream data transmitted by the first node belongs, which in one embodiment is a route to which the downstream data transmitted by the first node belongs;
■ Packet header indication information indicating information to be added to the packet header, such as setting of DSCP field and setting of flow label field of the IP packet header
■ The node sending the information may be a node having an interface (such as an F1 interface) with the relay node, or may be a node having no interface (such as an F1 interface) with the relay node, where the information includes configuration information used when transmitting data on the interface (F1 interface) of the relay node in the network managed by the sending node, or configuration information used when transmitting data on the interface (F1 interface) of the relay node in the network managed by the other node. In the above scenario, in one example, the " Data configuration information"is the second node transmits to the third node or the fourth node, in another example, the"Data configuration information"is the third node or the fourth node transmits to the second node, in another example, the"Data configuration confidence Rest"is the third node transmitting to the fourth node, or the fourth node transmitting to the third node, in another example," the third node:data distribution Information setting"is information forwarded by the third node from the fourth node, in another embodiment the"Data configuration information"is information forwarded by the third node from the second node. Further, if the "Data configuration information"is generated by a node having an interface (such as an F1 interface) with the relay node (if the information is information forwarded by the third node from the second node, the information is also considered to be generated by the node having an interface with the relay node), the" identification information of the input backhaul link channel "included in the information is a channel used when the first node receives uplink data," the "identification information of the output backhaul link channel" is a channel used when the first node sends downlink data, "the" input route identification information "is a route to which the uplink data received by the first node belongs, the information may be included in an uplink data packet, the" output route identification information "is a route to which the downlink data sent by the first node belongs, and the information may need to be included in a downlink data packet; if the' Data configuration information"is by and relaysThe node without an interface (such as F1 interface) generates (if the information is information forwarded by the third node from the fourth node, it is also considered that the information is generated by a node without an interface with the relay node), the "identification information of the input backhaul link channel" included in the information is a channel used when the first node receives downlink data, the "identification information of the output backhaul link channel" is a channel used when the first node receives uplink data, the "input route identification information" is a route to which the downlink data received by the first node belongs, the information may be included in a downlink data packet, the "output route identification information" is a route to which the uplink data sent by the first node belongs, and the information may need to be included in the uplink data packet.
The invention relates to two transfer methods of relay nodes:
■ Partial migration (Partial migration): in this method, only partial migration of data occurs on the relay node, in one embodiment, RRC connection of the mobile terminal portion of the relay node is migrated (e.g., a cell to which the relay node is connected is changed), but connection of the F1 interface of the distribution unit portion of the relay node is not migrated, and fig. 5 shows partial migration
■ Complete migration (Full migration): in this way, the data on the relay node is completely migrated, and in one embodiment, the RRC connection of the mobile terminal portion of the relay node is migrated (e.g., the cell to which the relay node is connected is changed), and the connection of the F1 interface of the relay node is also migrated to the node serving the cell of the relay node.
The signalling flow to which the present invention relates may be regarded as an interaction between two network nodes (a first network node and a second network node), which may be a second node and a third node, or a third node and a fourth node, respectively, or a second node and a fourth node, respectively, or a first node and a second node, respectively, etc. The signaling interaction flow is to configure the relay node to transmit cross-topology data, specifically, the signaling flow is to configure the relay node to transmit data with the anchor node through a network managed by other nodes (i.e. configure the relay node to transmit data across the network (topology)), and may include the following two steps, as shown in fig. 7:
step 1: the first network node sends a first message to the second network node, the message comprising the following contents, based on different purposes:
(1) Providing candidate information of the target cell for the second network node, the first message comprising at least one of the following information (step 1-a-1):
identification information of target node
Information of candidate service nodes
Identification information of target cell
Information of candidate cells
(2) Providing the second network node with first indication information of an update configuration for updating configuration information of a relay node served by the second network node, the first message including at least one of the following information (step 3-a-1, or step 4-1, or step 3-c-1, step 3-b-1):
indication information of configuration change such as indication information of first configuration change, indication information of second configuration change, indication information of third configuration change
Configuration update information such as first configuration update information, second configuration update information, third configuration update information
Access information, such as first access information, second access information, third access information
Node configuration information such as node first configuration information, node second configuration information, node third configuration information
Data configuration update request information such as first data configuration update request information, third data configuration update request information
Group update indication information, such as first group update indication information, third group update indication information
Data transmission configuration information such as first data transmission configuration information, second data transmission configuration information, third data transmission configuration information
Indication information of request migration
Identification information of target node
Information of data to be migrated
(3) Providing a first configuration indication information for the second network node, the indication information comprising at least one of the following information for configuring a serving cell of the relay node (step 2-1):
data information of first node
Information of data to be newly created
First interface information
First information of connection node
Service area indication information
Request information of migration method
Step 2: the second network node sends a second message to the first network node, the message comprising the following contents, based on different purposes:
(1) Providing the first network node with auxiliary information for cell selection, the information comprising at least one of the following information:
(step 1-b-1)
Node configuration information
Identification information of second service node
Identification information of second serving cell
(step 1-a-2)
Identification information of first service node
Information of optional service nodes
Identification information of first serving cell
Information of selectable cells
(2) Providing the first network node with request information or response information of the configuration update, the request information being the configuration update requested by the second network node, and the response information being a response to the request of the first network node, the information comprising at least one of:
(step 3-2/3-3/3-4/3-5)
Information of admitted data
Information of rejected data
Information of data to be configured
(step 2-2)
Information of admitted data to be newly created
Rejected information of data to be newly created
Second interface information
Reply information of migration method
Step 2 may be triggered by step 1, may be responsive to step 1, or steps 1 and 2 may be performed separately.
For details of the information contained in the first message and the second message, please see the following description of four aspects, which describe different implementations of the step 1 and the step 2 in different scenarios, respectively.
First aspect: selection of a target serving cell for a first node
The procedure is mainly used for selecting a new target serving cell (PCell or PSCell) for the first node, where the new target serving cell and the serving cell of the current first node may belong to the same base station or may belong to different base stations. The scene referred to by the flow may be any one of the above-described scenes one/two/three/four/five/six. In these scenarios, the current serving cell of the first node is the cell managed by the third node. According to the prior art, a new serving cell of the first node should be determined by the third node, but this may have a problem that if the target serving cell selected by the third node is a serving cell belonging to the fourth node, it is not known whether the fourth node serves the data transmission between the first node and the second node (e.g. there is no interface between the second node and the fourth node, so that configuration between the second node and the fourth node is impossible), which results in a problem that the selected target cell is not suitable.
Before introducing the solution, the present invention defines a "service area": the service area may include one or more nodes (if an interface is established between a first node and a second node, the nodes in the service area can interact with the second node to complete data transmissions over the interface via a network managed by the nodes in the area) or one or more cells (if an interface is established between a first node and a second node, the nodes serving the cells can complete data transmissions over the interface with the second node via a network managed by the serving nodes of the cells in the area). In one embodiment, the service area is associated with a node, such as a second node, and nodes in the service area (or nodes serving cells in the area) may interact with the second node (or have interfaces with the second node, such as an Xn/X2 interface) to complete data transmission between the first node and the second node, so that the nodes (or cells) contained in the service areas associated with different nodes may be different; in one embodiment, the service area is associated with a cell; in another embodiment, the service area is not associated with a node, any two nodes (or service nodes of any two cells) within the service area can interact to configure data transmission of the first node, and in one embodiment, the service area is not associated with a cell, and nodes serving any two cells within the service area can interact to configure data transmission of the first node. Specifically, as an example, the service area may be named as a partial migration service area, and the cross-topology data transmission service area, that is, the node in the service area (or the service node of the cell in the service area) can configure the relay node that performs the partial migration, or configure the relay node to perform the cross-topology data transmission.
In order to solve the problem of unsuitable target serving cell selection, the present invention proposes the following possible method.
1) The method comprises the following steps: second node decision
In the method, the third node provides an alternative serving cell or an alternative fourth node for the second node, and then the second node determines the target serving cell or the fourth node and notifies the third node. Specifically, this embodiment includes the following steps, as shown in fig. 8 (a):
step 1-a-1: the third node sends a first configuration message to the second node, the message serving to inform information about the serving cell of the first node, the message comprising at least one of:
■ Identification information of the target node, the information indicating a node selected by the third node to serve the first node
■ Information of candidate serving nodes providing identification information of one or more nodes selected by the third node to be capable of serving the first node
■ Identification information of the target cell, which indicates the cell selected by the third node to serve the first node, wherein the cell may be a PCell or a PSCell, and the identification information may be PCI and/or frequency information, or NCGI, or ECGI, or other information capable of identifying a cell
■ Information of candidate cells, which provides identification information of one or more cells selected by the third node to be capable of serving the first node, the cells being candidate cells for PCell or candidate cells for PSCell, the information including at least one of the following information:
■ The identification information of a cell, such as PCI and/or frequency information, NCGI, ECGI, or other information that can identify a cell
■ Measurement result information of cells, such as RSRP information, RSRQ information, etc
■ Information of cell load
■ Identification information of base station where cell is located
Step 1-a-2: the second node sends a first configuration response message to the third node for confirming the target node or cell selected by the third node (e.g., the node or cell identified by the identification information of the target node or the identification information of the target cell in step 1-a-1), and/or the message functions to inform the second node of the selected node or cell serving the first node, the message including at least one of the following information:
■ Identification information of the first service node identifying the node selected by the second node to be able to serve the first node, in one embodiment selected based on the "information of candidate service node" in step 1-a-1
■ Information of an optional serving node indicating identification information of one or more nodes selected by the second node to be able to serve the first node. In one embodiment, the information is selected based on the "candidate serving node information" in step 1-a-1
■ Identification information of the first serving cell, or identification information of the target node, which identifies identification information of a cell selected by the second node to be capable of serving the first node. In one embodiment, the information is selected based on the "candidate cell information" in step 1-a-1
■ Information of the selectable cell, or the identification information of the target cell, which indicates the identification information of one or more cells selected by the second node to be able to serve the first node. In one embodiment, the information is selected based on the "candidate cell information" in step 1-a-1
In the above method, if the second node cannot determine the appropriate target cell according to the information received in step 1-a-1, that is, the target cell selected by the second node may result in failure to transmit the data between the first node and the second node through the cell selected by the third node, migration of the F1 interface of the first node is required, and for details, see the fourth aspect of the present invention.
The method has the technical effects that the third node can obtain the information of the proper target cell through negotiation with the second node, so that the proper service cell is configured for the first node, the service node of the service cell can interact with the second node to configure the transmission of the cross-network (topology) data of the first node, the situation that the service node of the selected service cell cannot configure the cross-network (topology) data transmission of the first node is avoided, and the interruption of the data transmission is reduced.
The first configuration message and the first configuration response message may be messages of the existing Xn/X2 interface, or may be newly defined messages.
2) The second method is as follows: third node decision
In the method, the selection of the serving cell of the first node is determined entirely by the third node. However, in order to select a suitable serving cell, the third node refers to some assistance information from the second node, and this embodiment includes the following steps, as in fig. 8 (b):
step 1-b-1: the second node sends a second configuration message to the third node, which in one embodiment is the node with the F1 interface with the first node, the third node being the node where the RRC connection of the first node is located. In another embodiment, the second node and the third node are any two nodes. The message serves to provide configuration information about the serving relay node (e.g. the first node) to the third node, the message comprising at least one of the following information:
■ Node configuration information, which in one embodiment is configuration information of a second node, and in another embodiment, if the "second configuration message" is sent by another node, the information is configuration information of a sending node, where the information includes at least the following information:
■ Identification information of node
■ Identification information of service area to which node belongs
■ Identification information of service area associated with the node
■ Identification information of a node contained in a service area associated with the node
■ Identification information of cells contained in service area associated with the node
■ Information of a served cell, the information comprising at least one of:
identification information of cells
Identification information of the service area to which the diamond-like carbon belongs
Identification information of service area associated with the cell
Identification information of nodes included in service area associated with the cell
Identification information of cells included in service area associated with the cell
■ Identification information of a second serving node indicating identification information of one or more other nodes that can serve the first node, in one embodiment the node identified by the information is a node that interfaces with the second node, in another embodiment the node identified by the information is a node that can interact with the second node to configure information to serve the first node, in another embodiment the node identified by the information is a node that can support cross-topology data transfer of the first node in conjunction with the second node
■ Identification information of a second serving cell indicating identification information of one or more cells that can serve the first node, in one embodiment the serving node of the cell identified by the information is a node that interfaces with the second node, in another embodiment the serving node of the cell identified by the information is a node that can interact with the second node to configure information to serve the first node, in another embodiment the serving node of the cell identified by the information is a node that can support cross-topology data transfer of the first node in conjunction with the second node
Further, the step 1-b-1 is described by taking interaction between the second node and the third node as an example, and in an actual system, the step may be performed between any two nodes, and the information included in the second configuration message is information on the transmitting node side
Based on the information in step 1-b-1, the third node may decide to serve the cell of the first node, thereby configuring the serving cell for the first node.
In the above method, if the third node cannot determine the appropriate target cell, the cell selected by the third node will cause that the data between the first node and the second node cannot be transmitted through the cell selected by the third node, and at this time, migration of the F1 interface of the first node is required, for details, see the fourth aspect of the present invention.
The method has the technical effects that the third node can select a proper target cell according to the auxiliary information provided by the second node, so that the service node of the target cell can interact with the second node to configure the transmission of the cross-network (topology) data of the first node, the situation that the service node of the selected target cell cannot configure the transmission of the cross-network (topology) data of the first node is avoided, and the interruption of the data transmission is reduced.
The second configuration message may be a message of an existing Xn/X2 interface, such as an Xn/X2 Setup Request, an Xn/X2 Setup Response, configuration update, configuration update acknowledge, or a newly defined message, such as an inter-topology transport modification Request/required message, an inter-topology transport modification acknowledge/confirm message, etc.
Second aspect: configuration of target serving cell of first node
When the third node selects the target serving cell of the first node, the third node may perform configuration of the cell for the first node according to the following procedure:
process 1: a handover or migration procedure of a first node, one of the purposes of which is to change the PCell serving the first node.
In one embodiment, the process may occur in a topology managed by the third node (e.g., scenario one), and the related flow is a handover flow in the central unit, which is not described herein. In another embodiment, the procedure may occur between the third node and the fourth node (e.g., scenario two, i.e., changing a cell managed by the third node by the PCell of the first node to a cell managed by the fourth node), and the involved procedure is a handover/migration procedure between the centralized units.
Process 2: the addition procedure of the PSCell of the first node, one of the purposes of this procedure is to configure one PSCell for the first node.
In one embodiment, the process may occur in a topology managed by the third node (e.g., scenario three), and the related flow is a PSCell adding flow in the central unit, which is not described herein. In another embodiment, the process may occur between the third node and the fourth node (e.g., scenario four, i.e., adding a cell managed by the fourth node to the first node), where the involved procedure is a PSCell addition procedure between the centralized units.
Process 3: a procedure for changing the PSCell of the first node, one of the purposes of this procedure is to change the PSCell serving the first node.
In one embodiment, the process may occur in a topology managed by the third node (e.g., scenario five), and the related flow is a PSCell change flow in the central unit, which is not described herein. In another embodiment, the process may occur between the third node and the fourth node (e.g., scenario six, i.e., changing the PSCell of the first node to a cell managed by the fourth node), where the involved flow is a PSCell change flow between centralized units
Before executing the above procedure, the connection state of the first node is: an RRC connection is established between the mobile terminal part of the first node and the third node, and an F1 interface is established between the distribution unit part of the first node and the second node. In these processes, the serving node of the target serving cell may not know that the connection between the first node and the second node is still maintained, and thus cannot configure data transmission between the first node and the second node. In order to solve this problem, the present invention proposes the following procedure, as shown in fig. 9:
step 2-1: the third node sends a third configuration message to the fourth node, which acts to provide the fourth node with information required to configure the first node, the content of which may be referred to as the content in the handover request message or the content in the secondary node addition request message. In addition, in order to configure data transmission between the first node and the second node, it is also possible to include at least one of the following information:
■ Data information of the first node, which information indicates information of data belonging to the first node to be served by the fourth node, which information includes content which can be referred to as "data configuration information" described above, and in one embodiment, after receiving the information, the fourth node provides configuration information related to the data to the second node
■ Information of newly created data, which is newly added data requiring configuration by the fourth node, the information including what is referred to above as "data configuration information", which in one embodiment may be considered to be generated by a third node that does not interface with the first node (e.g., F1 interface), and in another embodiment may be considered to be generated by a second node that interfaces with the first node (e.g., F1 interface), and then forwarded by the third node
■ The first interface information can help the fourth node identify whether the information contained in its interface signaling (such as signaling received from the third node or signaling received from other nodes (such as the second node)) is specific to the first node, and if the identification information is contained in the signaling, it indicates that the information related to the identification information in the signaling is specific to the first node. The information includes at least one of the following:
■ First information of an interface of the non-fourth node, the interface to which the information is directed is not an interface of the fourth node (such as an interface of the second node and the third node), the information at least includes one of the following information:
first interface node identification information, which is identification information of the first node on an interface other than the fourth node (such as an interface of the second node and the third node, also referred to as an uncorrelated interface), such as XnAP ID
First identification information of the node where the interface is located, such as identification information of the second node, identification information of the third node
■ First information of the fourth node interface, the interface to which the information is directed is an interface of the fourth node, such as an interface of the fourth node and the third node, or an interface of the fourth node and the second node, and the information includes at least one of the following information:
second interface node identification information, which is identification information of the first node on an interface of the fourth node (interface of the fourth node with the third node, or interface of the fourth node with the second node, also referred to as related interface), such as XnAP ID
Second identification information of the node where the interface is located, such as identification information of the second node, or identification information of the third node, or identification information of the fourth node
■ And the first identification information is the identification information of the first node used for the data transmission configuration of the interaction first node between the second node and the fourth node, and the identification information is contained in the signaling of the interaction of the second node and the fourth node. The identification information may be assigned by the second node and sent to the third node, or may be assigned by the third node, in one embodiment the information may be existing identification information, in another embodiment the information is a newly defined information
■ First information of a connected node, the information indicating information of a node having an interface (e.g., F1 interface) with the first node, the information including at least one of:
■ Identification information of nodes, e.g. of second nodes
■ Address information, e.g. IP address, of the second node side
■ Service area indication information, the description of which can be seen from the above-mentioned "first aspect". The indication information may be service area identification information, in one embodiment, the service area may be a service area where the second node is located, in another embodiment, the service area may be a service area where a cell where the first node is currently located (e.g. a service cell under the third node) belongs, according to which the fourth node may determine whether it can interact with the second node with the data transmission configuration information of the first node
■ Request information of migration method, the information is used for informing the fourth node that the migration method requested by the third node is about the first node, and the request information can indicate that the migration method is partial migration or complete migration
And 2-2, the fourth node sends a third configuration response message to the third node, wherein the message is used for providing configuration information required by the first node to the third node, and the content in the message can be referred to the content in the handover response message or the content in the response message is added by the auxiliary node. Furthermore, in order to configure the data transmission between the first node and the second node, it is possible to include at least one of the following information:
■ Information of the received data to be newly created, the information including the content referred to above as "data configuration information", in one embodiment, the information can be considered as being generated by a third node having no interface (e.g. F1 interface) with the first node
■ Refused information of data to be newly built, the content of the information can be referred to as the data configuration information "
■ And second interface information, which can help the second node identify whether information contained in interface signaling (such as signaling received from the third node or signaling received from other nodes (such as the fourth node)) is specific to the first node, and if the identification information is contained in the signaling, the information related to the identification information in the signaling is specific to the first node. The information includes at least one of the following:
■ First information of an interface of the non-third node, the interface to which the information is directed is not an interface of the third node (such as an interface of the second node and the fourth node), the information at least includes one of the following information:
third interface node identification information, which is identification information of the first node on an interface other than the third node (also referred to as an uncorrelated interface, such as an interface of the second node and the fourth node), such as XnAP ID
Third identification information of the node where the interface is located, such as identification information of the second node, identification information of the fourth node
■ First information of the interface of the third node, the interface to which the information is directed is an interface of the third node (also referred to as related interface), such as an interface of the third node and the fourth node, or an interface of the third node and the second node, and the information includes at least one of the following information:
fourth interface node identification information, which is identification information of the first node on an interface of the third node (also referred to as a related interface, for example, an interface of the fourth node with the third node, or an interface of the third node with the second node), such as XnAP ID
Fourth identification information of the node where the interface is located, such as identification information of the second node, or identification information of the third node, or identification information of the fourth node
■ And the second identification information is the identification information of the first node used for the data transmission configuration of the interaction first node between the second node and the fourth node, and the identification information is contained in the signaling of the interaction of the second node and the fourth node. The identification information may be assigned by the fourth node and transmitted to the third node. In one embodiment, the information may be existing identification information, in another embodiment, the information is a newly defined information
■ Reply information to the migration method, which in one embodiment indicates whether the fourth node accepts the migration method requested in step 2-1, and in another embodiment may indicate the migration method selected by the fourth node (e.g., partial migration, or complete migration). This reply information is determined by the fourth node based on one or more information in step 2-1 (e.g. "first information of connection node", "node identification information of interface", "service area indication information"), and if the requested portion is accepted for migration, it indicates that the fourth node may perform configuration with respect to data transmission of the first node with the second node, so that data transmission between the first node and the second node is performed in the network managed by the fourth node, and if the requested portion is not accepted for migration, it is necessary to migrate the F1 interface of the first node from the second node to another node, and the method for migrating the F1 interface may refer to the fourth aspect of the present invention.
If it is determined by the third configuration response message that the fourth node can interact with the second node and transmit data between the first node and the second node in the network served by the fourth node, it indicates that the target serving cell selected by the third node (the serving cell of the fourth node) is a suitable cell capable of maintaining the data transmission between the first node and the second node across topologies; if it is determined by the third configuration response message that the fourth node cannot interact with the second node, and further, data transmission between the first node and the second node cannot be achieved in the network served by the fourth node, it is indicated that the target serving cell selected by the third node (the serving cell of the fourth node) is not a suitable cell capable of maintaining data transmission between the first node and the second node across topologies. Therefore, in addition to completing the configuration of the target serving cell of the first node, in one embodiment, it may also be determined whether the interface of the first node (such as the F1 interface) needs to be migrated when the method of the second aspect of the present invention is not used.
Step 2-3: the first node (or mobile terminal part of the first node) accesses the newly configured cell, and in this step may include: 1) the third node sends a user configuration request message to the first node, the message serving to configure the first node to access the new cell, the message being referred to as an RRC reconfiguration message, 2) the first node performs a random access procedure in the newly configured cell to communicate with the network through the newly configured cell, 3) the first node sends a configuration complete message to the third node or the fourth node. This procedure can be seen in the prior art handover procedure or PSCell addition or PSCell change procedure.
The technical effect of the steps is that a new service cell is configured for the first node, and meanwhile, information of the node connected with the first node (such as a node establishing an interface with the first node) is provided, so that the new service node of the first node can still configure cross-network (topology) data transmission of the first node, and interruption of the data transmission is avoided.
The third configuration message and the third configuration response message may be respectively a Handover Request and Handover Request Acknowledge message of the existing Xn/X2 interface, or second node addition/modification Request and second node addition/modification Request Acknowledge messages, etc., or may be a new message, such as an inter-topology transport modification Request/required message, an inter-topology transport modification acknowledge/confirm message, etc.
Third aspect: configuration update flow of a first node
After a new serving cell (e.g., PCell, PSCell) is configured for a first node, if the first node remains connected (e.g., F1 connected) to a second node, then the second node needs to be updated in configuration. However, the serving node of the cell to which the first node is connected may be a new node (e.g., a fourth node) which is unknown to the second node, and thus, the addition of a new serving cell may result in a failure to configure data transmission between the first node and the second node. In order to solve the problem, the invention provides the following implementation methods:
1) The method comprises the following steps: configuration updating flow initiated by third node
In the method, the configuration updating flow may occur after the first node accesses a new serving cell, may occur during the process of accessing the new serving cell by the first node, or may occur after the new serving cell is determined by the third node. The process includes the following steps, as shown in fig. 10:
step 3-a-1: the third node sending a fourth configuration message to the second node, the message comprising at least one of the following information:
■ The function of the information is to inform the second node that the configuration of the first node is changed, after receiving the information, the second node can know that the configuration of the first node needs to be changed, so that a subsequent process is performed to obtain updated configuration, and the information at least comprises one of the following information:
■ Information indicating a change of the node, which is used to indicate that the node to which the first node is connected (the node may be the node where the PCell to which the first node is connected is located, or the node where the PSCell to which the first node is connected is located, etc.), in one embodiment the node may be a distribution unit of the base station to which the first node is connected (directly or indirectly) (e.g. when the third node is a base station, the distribution unit is a distribution unit of the third node, when the third node is a hub unit of the base station or a control plane part of the hub unit, the distribution unit is a distribution unit to which the third node is connected), in another embodiment the node may be a hub unit of the base station or a control plane part of the hub unit of the base station to which the base station is connected (directly or indirectly), in another embodiment the node may be a Parent node (part node) to which the first node is connected
■ Transmitting reconfiguration indication information, the information being used to indicate that configuration of transmission of all or part of data between the second node and the first node requires reconfiguration
■ Transmitting request indication information of reconfiguration, the information serving to request the second node to perform reconfiguration of configuration of transmission of all or part of data between the second node and the first node
■ Transmitting information indicating the reconfigured data, the information serving to inform the second node which data transmission between the second node and the first node needs to be reconfigured, the information including at least one of:
indicating information of data stream, such as traffic ID, indicating identification information of data stream to which data requiring reconfiguration belongs
Indication information of the tunnel, such as an ID of the tunnel, information of the tunnel (such as transport layer address information, identification information of tunnel end point, tunnel Endpoint ID) indicating information of the tunnel used for data requiring reconfiguration
Transport network layer association (TNL association) indicating information such as associated ID, associated information (port information, address information)
Identification information of a bearer indicating identification information of a bearer to which data requiring reconfiguration belongs
Address information of a transport layer indicating address information for data requiring reconfiguration
Identification information of transmission route indicating route identification (routing ID) for data requiring reconfiguration
Address information of adaptation layer indicating address information of adaptation layer for data requiring reconfiguration, such as BAP (Backhaul adaptation protocol) address information
■ The first configuration update information is used for providing new configuration information used in data transmission between the second node and the first node, and the information can be updated configuration information. According to the information, the second node can know that the configuration of the first node needs to be changed, so that a subsequent process is carried out to obtain updated configuration. The reason for such configuration update may be that the third node has made a cell change to the first node, or that the third node has added a PSCell to the first node, or that the third node has changed the PSCell to which the first node is connected, etc. The information includes at least one of the following:
■ Address information of a distribution unit of the base station, such as an IP address, a BAP address, etc. The information indicates address information of a distribution unit of a base station to which the first node is connected, in one embodiment the distribution unit is a distribution unit to which a PCell to which the first node is connected, in another embodiment the distribution unit is a distribution unit to which a PSCell to which the first node is connected, further, based on the information, the second node knows that the distribution unit to which the first node is connected has changed or increased, and thus implicitly knows whether or not to reconfigure its data transmission with the first node
■ Address information of a parent node, such as a BAP address, indicating address information of the parent node to which the first node is connected, in one embodiment the parent node is the parent node where the PCell to which the first node is connected is located, in another embodiment the parent node is the parent node where the PSCell to which the first node is connected is located, further, according to the information, the second node knows that the parent node to which the first node is connected has been changed or increased, and thus implicitly knows whether to reconfigure data transmission with the first node
■ First access information, which serves to provide information about the access of the first node (e.g. cell accessed, base station accessed, etc.), which the second node can decide with which base station or anchor node to perform configuration interactions with respect to the data transmission of the first node after receiving the information. The information includes at least one of the following:
■ The identification information of the cell, the information indicating the cell to which the first node is connected, or the cell serving the first node. In one embodiment, the cell is a primary cell (e.g., PCell), and in another embodiment, the cell is a primary secondary cell (e.g., PSCell). The identification information may include at least one of PCI, frequency information, NCI, NR CGI. One possible effect of this information is: helping the second node to determine the cell to which the first node is connected, thereby determining the base station to which it is connected, and interacting with the base station to configure the data transmission of the first node
■ Identification information of the serving node, the information indicating identification information of a base station to which the first node is connected, the base station may be a base station having an anchor node function in one embodiment, and the base station may be a base station not having an anchor node function in another embodiment; in another embodiment, the base station may be a base station different from the second node and/or the third node, such as the fourth node in scenario two/four/six described above. One possible effect of this information is: helping the second node to determine the cell to which the first node is connected, thereby determining the base station to which it is connected, and interacting with the base station to configure the data transmission of the first node
■ The first configuration information of the node indicates the identification information of the first node, and one possible role of the identification information is that the second node can interact with other nodes serving the first node (such as a fourth node) by using the identification information, so as to help the other nodes identify whether the information in the received message is specific to the first node or not, if the information is contained in the message sent by the second node to the fourth node, the fourth node can know that the information corresponding to the information in the message is specific to the first node. The information includes at least one of the following:
■ First information of an interface of the non-second node, the interface to which the information is directed is not an interface of the second node (such as an interface of the third node and the fourth node), the information at least includes one of the following information:
fifth interface node identification information, which is identification information of the first node on an interface other than the second node (also referred to as an uncorrelated interface, such as an interface of the third node and the fourth node), such as XnAP ID
Fifth identification information of the node where the interface is located, such as identification information of the third node, identification information of the fourth node, and the like
■ First information of the interface of the second node, the interface to which the information is directed is an interface of the second node, also referred to as a related interface, such as an interface of the second node and the third node, or an interface of the second node and the fourth node, and the information includes at least one of the following information:
sixth interface node identification information, which is identification information of the first node on the interface of the second node (interface of the second node with the third node, or interface of the second node with the fourth node), such as XnAP ID
Sixth identification information of the node where the interface is located, such as identification information of the second node, or identification information of the third node, or identification information of the fourth node
■ And the second identification information is the identification information of the first node used for the data transmission configuration of the interaction first node between the second node and the fourth node, and the identification information is contained in the signaling of the interaction of the second node and the fourth node. The identification information may be assigned by the fourth node, by the third node, or by the second node, and in one embodiment may be existing identification information, and in another embodiment may be a newly defined information
■ User identification information of a cell, such as C-RNTI, which may be the identification information of the first node in the serving cell of the fourth node, and further may also contain the identification information of the cell, such as the identification information of the cell (PCell or PScell) belonging to the fourth node serving the first node
■ First data configuration update request information serving to inform the second node of data requesting update of the configuration, the information including at least one of:
■ Information of the data to be modified, which information may include the above-mentioned "data configuration information", is generated based on information transmitted from the fourth node to the third node, such as the above-mentioned "information of the admitted data to be newly created" included in step 2-2, and further, may be considered as a node having no interface with the first node
■ Information of the data to be released, which may be included in the information may be referred to as "data configuration information" described above, and in one embodiment, the information is generated based on information transmitted from the fourth node to the third node, such as "rejected data to be newly created" included in the above step 2-2
■ A first set of update indication information (the first group update indication information) indicating a configuration that needs to be updated, the information serving to update all data having the same configuration information, such as a set update. The information includes at least one of the following:
■ Adaptation layer address (e.g., BAP address) update information indicating an adaptation layer address that needs to be updated, e.g., a new adaptation layer address, an old adaptation layer address
■ Transport layer address (e.g., IP address) update information indicating transport layer addresses that need to be updated, e.g., new transport layer address, old transport layer address
■ Input backhaul link channel update information indicating an input backhaul link channel requiring update, such as a new input backhaul link channel, an old input backhaul link channel
■ Output backhaul link channel update information indicating an output backhaul link channel requiring update, such as a new output backhaul link channel, an old output backhaul link channel
■ Input route identification update information indicating an input route identification that needs to be updated, such as a new input route identification, an old input route identification
■ Output route identification update information indicating an output route identification that needs to be updated, such as a new output route identification, an old output route identification
■ Header indication update information indicating header indication to be updated, such as new DSCP value, old DSCP value, new flow label value, old flow label value
■ The first data transmission configuration information is used to assist the second node in configuring the data transmission of the first node, and in one embodiment, the configuration information is generated by the third node, and in another embodiment, the configuration information is generated by another node (such as a fourth node) and then sent to the third node, and then sent to the second node by the third node. The information includes at least one of the following:
■ Header indication information indicating information to be added to the header, such as DSCP value, flow Label value, etc., which in one embodiment is applied to all data packets sent to the first node (e.g., data packets of the F1 interface), such as default DSCP/Flow Label values,
■ IP address information indicating the IP address of the second node at the first node when the second node performs data transmission (e.g., F1 interface data transmission) with the first node, further, data types (e.g., F1 interface data, non-F1 interface data, F1-U interface user plane (F1-U) data, F1 interface control plane (F1-C) data, user-associated F1 interface control plane data (UE-associated F1-C), non-user-associated F1 interface control plane data (non-UE-associated F1-C)) to which the IP address is applicable, BAP address information (e.g., BAP address is the address of the distribution unit of the anchor node associated with the IP address) associated with the IP address, etc
The technical effects of the method are as follows: providing the updated configuration for the second node, informing the second node of the new service node connected with the first node, thus helping the second node to determine the configuration needed to be updated and determine the node which continues to perform the cross-network (topology) data transmission of the relay node with the second node, maintaining the continuity of the data transmission and avoiding transmission interruption.
The fourth configuration message may be a message of an existing Xn/X2 interface, such as secondary node modification required message, or a message of a new Xn/X2 interface, such as inter-topology transport modification request/required message, inter-topology transport modification acknowledge/confirm message, etc.
The second method is as follows: the first node initiated configuration update procedure as shown in FIG. 11 (a)
Step 3-b-1: the first node sends a fifth configuration message to the second node, the message serving to inform the second node of new configuration information, the message including at least one of:
■ Indication of the second configuration change, which may be found in the description of step 3-a-1 above
■ Second configuration update information, which can be seen from the description in step 3-a-1 above
■ Second access information, which may be referred to the description in step 3-a-1 above
■ And the second configuration information of the node indicates the identification information of the first node, and one possible role of the identification information is that the second node can interact with other nodes serving the first node (such as a fourth node) by using the identification information, so as to help the other nodes identify whether the information in the received message is specific to the first node or not, if the information is contained in the message sent by the second node to the fourth node, the fourth node can know that the information corresponding to the information in the message is specific to the first node. The information includes at least one of the following:
■ And third identification information, wherein the identification information is the identification information of the first node used for the data transmission configuration of the interaction first node between the second node and the fourth node, and the identification information is contained in the signaling of the interaction between the second node and the fourth node. The identification information may be assigned by the fourth node, or by the third node, or by the second node, and in one embodiment may be existing identification information, and in another embodiment may be newly defined information. Further the third identification information may be the second node/third node/fourth node transmitting the first node
■ User identification information of cells, e.g. C-RNTI
■ Identification information of a serving cell, which is a cell serving the first node, which may be a PCell or a PSCell
■ The second data transmission configuration information, which can be seen from the technical effects of the description of the method in the step 3-a-1, are as follows: the second node can obtain the information of the new cell connected with the first node, thereby helping the second node to determine the cross-network (topology) data transmission with which the relay node is configured together, and the continuity of the data transmission can be maintained, and the transmission interruption is avoided.
The fifth configuration message may be a message of an existing F1 interface, such as a gNB-DU configuration update message, or may be a message of a new F1 interface.
And a third method: fourth node initiated configuration update procedure, as shown in FIG. 12
Step 3-c-1: the fourth node sends a sixth configuration message to the second node, the message serving to inform the second node of new configuration information, the message including at least one of:
■ Indication of the third configuration change, which can be seen from the description in step 3-a-1 above
■ Third configuration update information, which can be seen from the description in step 3-a-1 above
■ Third access information, which may be found in the description of step 3-a-1 above
■ And the third configuration information of the node indicates the identification information of the first node, and one possible role of the identification information is that the second node can interact with other nodes serving the first node (such as a fourth node) by using the identification information, so as to help the other nodes identify whether the information in the received message is specific to the first node or not, if the information is contained in the message sent by the second node to the fourth node, the fourth node can know that the information corresponding to the information in the message is specific to the first node. The information includes at least one of the following:
■ Second information of the interface of the non-second node, the interface to which the information is directed is not an interface of the second node (also referred to as an irrelevant interface, such as an interface of the third node and the fourth node), the information including at least one of the following information:
seventh interface node identification information, which is identification information of the first node on an interface other than the second node (also referred to as an uncorrelated interface, such as an interface of the third node and the fourth node), such as XnAP ID
Seventh identification information of the node where the interface is located, such as identification information of the third node, identification information of the fourth node, and the like
■ Second information of the interface of the second node, the interface to which the information is directed is an interface of the second node, also referred to as a related interface, such as an interface of the second node and the third node, or an interface of the second node and the fourth node, and the information includes at least one of the following information:
eighth interface node identification information, which is identification information of the first node on an interface of the second node (also referred to as a related interface, an interface of the second node with the third node, or an interface of the second node with the fourth node), such as XnAP ID
Eighth identification information of the node where the interface is located, such as identification information of the second node, or identification information of the third node, or identification information of the fourth node
■ And fourth identification information, wherein the identification information is the identification information of the first node used for the data transmission configuration of the interaction first node between the second node and the fourth node, and the identification information is contained in the signaling of the interaction between the second node and the fourth node. The identification information may be assigned by the fourth node, by the third node, or by the second node, and in one embodiment may be existing identification information, and in another embodiment may be a newly defined information
■ User identification information of a cell, such as C-RNTI, which may be the identification information of the first node in the serving cell of the fourth node, and further may also contain the identification information of the cell, such as the identification information of the cell (PCell or PScell) belonging to the fourth node serving the first node
■ Third data configuration update request information, which can be seen from the description in step 3-a-1 above
■ A third set of update indication information, which may be described in step 3-a-1 above
■ Third data transmission configuration information, which can be seen from the description in step 3-a-1 above
The technical effects of the method are as follows: the fourth node establishes connection with the second node, so as to help the second node determine cross-network (topology) data transmission with which the relay node is configured together, thereby maintaining continuity of data transmission and avoiding transmission interruption.
The sixth configuration message may be a message of an existing Xn/X2 interface, such as secondary node modification required message, or a message of a new Xn/X2 interface, such as inter-topology transport modification request/required message, inter-topology transport modification acknowledge/confirm message, etc.
When the second node knows that the configuration of the first node needs to be updated through any one of the three methods, the method further comprises the following steps:
optionally, step 3-2: the second node sends a fourth configuration response message to the third node, which in one embodiment may occur after step 3-a-1, as in FIG. 10
Optionally, step 3-3: the second node sends a seventh configuration message to the third node, which in one embodiment may occur after step 3-b-1, as in fig. 11 (a), and in another embodiment may occur after step 3-a-1, as in fig. 11 (b)
Optionally, step 3-4: the second node sends a sixth configuration response message to the fourth node, which in one embodiment may occur after step 3-c-1, as in FIG. 12
Optionally, step 3-5: the second node sends an eighth configuration message to the fourth node, which in one embodiment may occur after step 3-a-1, as in fig. 13 (a), which in one embodiment may occur after step 3-b-1, as in fig. 13 (b), which in one embodiment may occur after step 3-c-1, as in fig. 13 (c),
The above-described "fourth configuration response message", "seventh configuration message", "sixth configuration response message", and "eighth configuration message" may contain at least one of the following information:
■ Information of the admitted data, which in one embodiment is determined from the information received in step 3-a-1 or step 3-c-1, comprises at least one of the following information:
■ Information of the received data to be modified, the content of which can be referred to as the data configuration information "
■ Information of the data to be released which is received, the content of the information can be referred to as the data configuration information "
■ Information of the rejected data, which in one embodiment is determined from the information received in step 3-a-1 or step 3-c-1 (e.g. "first data configuration update request information"), includes at least one of the following:
■ Refused information of data to be modified, the content of which can be referred to as "data configuration information"
■ Refused information of data to be released, the content of the information can be referred to as 'data configuration information'
■ Information of the first data to be configured, in one embodiment, the information is determined according to the information received in step 3-a-1 or step 3-b-1 or step 3-c-1 (e.g. "indication information of transmitting reconfigured data"), and the information includes at least one of the following information:
■ Information of data to be newly created, the content of which can be referred to as "data configuration information" described above "
■ Information of data to be modified, the content of which can be referred to as "data configuration information" described above "
■ Information of data to be released, the content of which can be referred to as "data configuration information" described above "
The technical effect achieved by the above process is that after the serving cell of the relay node changes, the second node can obtain updated configuration information or request to update configuration, so that cross-network (topology) transmission of the relay node is maintained, and data interruption is reduced.
The "fourth configuration response message", "seventh configuration message", "sixth configuration response message", and "eighth configuration message" may be messages of the existing Xn/X2 interface, such as secondary node modification request/required message, secondary node modification acknowledge/confirm message, etc., or newly defined messages, such as inter-topology transport modification request/required message, inter-topology transport modification acknowledge/confirm message, etc
Fourth aspect: context migration flow
In order to ensure data transfer at the first node, the third node may need to acquire a context of all data at the first node, which in one embodiment occurs because the second node cannot interact with the node where the serving cell of the first node is located, and in another embodiment occurs because the second node determines that migration of such a context may facilitate data transfer at the first node, which may further include the following steps, as shown in fig. 14:
step 4-1: the third node or the fourth node sends a ninth configuration message to the second node, wherein the message is used for requesting the second node to migrate the context information, and the message at least comprises one of the following information:
■ Information indicating that the second node needs to migrate the context of the data served on the first node to other nodes (e.g., a third node, a fourth node, or other nodes different from the third node and the fourth node)
■ Identification information of a target node, the information indicating the target node to which the context needs to be migrated
■ Information of data to be migrated, the information indicating data to be migrated with a context, the information including at least one of:
■ Indication information of data stream, such as traffic ID, indicating identification information of data stream to which data requiring reconfiguration belongs
■ Indication information of a tunnel, such as an ID of the tunnel, information of the tunnel (such as transport layer address information, identification information of tunnel end point, tunnel Endpoint ID), which indicates information of the tunnel used for data requiring reconfiguration
■ Identification information of a bearer indicating identification information of a bearer to which data requiring reconfiguration belongs
■ Address information of a transport layer indicating address information for data requiring reconfiguration
■ Transmitting route identification information indicating a route identification (routing ID) for data requiring reconfiguration
■ Address information of the adaptation layer indicating the address information of the adaptation layer for the data requiring reconfiguration, as in BAP (Backhaul adaptation protocol) address information step 4-2: the second node performs migration of the data context to a third node or other nodes (such as a fourth node), where the migrated information includes data information of a user accessing the first node, such as bearer information (bearer identification information, bearer QoS information), PDU session information (such as PDU session identification information, PDU session QoS information, etc.).
The technical effects of the steps are as follows: the second node is helped to determine whether to migrate the interface of the relay node to other nodes so as to enable the other nodes to continue to configure the cross-network (topology) data transmission of the relay node, and interruption of the data transmission is avoided.
The ninth configuration message may be a message of an existing Xn/X2 interface, such as secondary node modification request/required message, secondary node modification acknowledge/confirm message, etc., or a newly defined message, such as inter-topology transport modification request/required message, inter-topology transport modification acknowledge/confirm message, etc.
In addition, the above-described four flows may be performed separately or in combination with each other, and several possible embodiments are given below (for details of each message, see the description above).
Embodiment one (Intra-CU PCell change, intra-CU PSCell add/change, third node triggered, second node configuration update):
step a: the third node performs a PCell change or a PSCell addition or a PSCell change, and the new PCell/PSCell is still a cell of the third node
Step b: the third node sends a fourth configuration message to the second node, see step 3-a-1 above
Step c: the second node sends a seventh configuration message to the third node, see step 3-3 above
Embodiment two (Intra-CU PCell change, intra-CU PSCell add/change, second node configuration update):
step a: the third node performs a PCell change or a PSCell addition or a PSCell change, and the new PCell/PSCell is still a cell of the third node
Step b: the third node sends a fourth configuration message to the second node, see step 3-a-1 above
Step c: the second node sends a fourth configuration response message to the third node, see step 3-2 embodiment three above (Inter-CU PCell change/PSCell addition/PSCell change, second node providing assistance information for selection of the target cell):
step a: the second node sends a second configuration message to the third node, see step 1-b-1 above
Step b: the third node and the fourth node perform the configuration of the serving cell, see the steps 2-1/2-2/2-3
Step c: the third node sends a fourth configuration message to the second node, see step 3-a-1 above
Step d: the second node sends a seventh configuration message to the third node, see step 3-3 above, or the second node sends a fourth configuration response message to the third node, see step 3-2 above
Fourth embodiment (Inter-CU PCell change/PSCell addition/PSCell change, third node determining target cell or alternative):
step a, the third node sends the first configuration message to the second node, see step 1-a-1
Step b: the second node sends a first configuration response message to the third node, see step 1-a-2
Step c: the third node and the fourth node perform the configuration of the serving cell, see the steps 2-1/2-2/2-3
Step d: the third node sends a fourth configuration message to the second node, see step 3-a-1 above
Step e: the second node sends a seventh configuration message to the third node, see step 3-3 above, or the second node sends a fourth configuration response message to the third node, see step 3-2 above
Embodiment five (PCell change/PSCell addition/PSCell change, first node triggers configuration update)
Step a: the third node and the fourth node perform configuration of the serving cell, see the above steps 2-1/2-2/2-3, or the third node performs a PCell change or a PSCell addition or a PSCell change, and the new PCell/PSCell is still the cell of the third node
Step b: the first node sends a fifth configuration message to the second node, see step 3-b-1
Step c: the second node sends a seventh configuration message to the third node, see step 3-3, or the second node sends an eighth configuration message to the fourth node, see step 3-5
Embodiment six (PCell change/PSCell addition/PSCell change, fourth node triggers configuration update)
Step a: the third node and the fourth node perform the configuration of the serving cell, see the steps 2-1/2-2/2-3
Step b: the fourth node sends a sixth configuration message to the second node, see step 3-c-1
Step c: the second node sends a sixth configuration response message to the fourth node, see step 3-4, or the second node sends an eighth configuration message to the fourth node, see step 3-5
Embodiment seven (PCell change/PSCell addition/PSCell change, third node triggers configuration update)
Step a: the third node and the fourth node perform the configuration of the serving cell, see the steps 2-1/2-2/2-3
Step b: the third node sends a fourth configuration message to the second node, see step 3-a-1 above
Step c: the second node sends an eighth configuration message to the fourth node, see step 3-5.
Fig. 15 shows a schematic block diagram of an apparatus 1500 according to various embodiments of the present disclosure, which may be configured to implement any one or more of the methods according to various embodiments of the present disclosure. Accordingly, it should be appreciated that the apparatus 1500 may be a first network node or a second network node described in this disclosure, for example, as described above, a first node, a second node, a third node, a fourth node, or a portion thereof. It is to be appreciated that the device 1500 can be a relay node or a relay device or a portion thereof, or can be a base station (e.g., a 5G base station (e.g., a gNB, ng-eNB), or a 4G base station (e.g., an eNB), or other type of access node) or a portion thereof (e.g., a distribution unit DU, a concentration unit CU, etc. of a base station).
As shown in fig. 15, device 1500 includes a transceiver 1501, a processor 1502, and/or a memory 1503.
The transceiver 1201 is configured to receive and/or transmit signals.
The processor 1502 is operatively coupled to the transceiver 1501 and/or the memory 1503. The processor 1502 may be implemented as one or more processors for operating in accordance with any one or more of the methods described in various embodiments of the present disclosure.
The memory 1503 is configured to store computer programs and data. Memory 1503 may include non-transitory memory for storing operations and/or code instructions that may be executed by processor 1502. Memory 1503 may include non-transitory programs and/or instructions readable by a processor, which when executed, cause processor 1502 to implement the steps of any one or more of the methods according to various embodiments of the present disclosure. Memory 1503 may also include random access memory or buffer(s) to store intermediate processed data from the various functions performed by processor 1502.
Those of ordinary skill in the art will recognize that the description of the method of node movement of the present disclosure is merely illustrative and is not intended to be limiting in any way. Other embodiments will readily suggest themselves to such skilled persons having the benefit of this disclosure.
In the interest of clarity, not all of the routine features of the implementations of the methods and apparatus related to node movement of the present disclosure are shown and described. Of course, it should be appreciated that in the development of any such actual implementation of the method and apparatus, as in connection with node movement, numerous implementation-specific decisions may be required to achieve the developer's specific goals, such as compliance with application-, system-, network-and business-related constraints, and that these specific goals will vary from one implementation to another and from one developer to another.
The modules, processing operations, and/or data structures described in accordance with this disclosure may be implemented using various types of operating systems, computing platforms, network devices, computer programs, and/or general purpose machines. Furthermore, one of ordinary skill in the art will recognize that less general purpose devices such as hardwired devices, field programmable gate arrays (Field Programmable Gate Array, FPGAs), application specific integrated circuits (Application Specific Integrated Circuit, ASICs), or the like, may also be used. Where a method comprising a series of operations and sub-operations are implemented by a processor, computer, or machine, and those operations and sub-operations may be stored as a series of non-transitory code instructions by a processor, computer, or machine-readable, they may be stored on tangible and/or non-transitory media.
The modules of the methods and apparatus described herein relating to node movement may comprise software, firmware, hardware, or any combination(s) of software, firmware, or hardware suitable for the purposes described herein.
In the methods described herein in connection with node movement, various operations and sub-operations may be performed in various orders, and some of the operations and sub-operations may be optional.
While the foregoing disclosure of the present application has been made by way of non-limiting illustrative embodiments, these embodiments may be arbitrarily modified within the scope of the appended claims without departing from the spirit and nature of the disclosure.
Claims (20)
1. A method performed by a first network node in a communication system, comprising:
transmitting to the second network node at least one of: candidate information related to cell selection, first data configuration information, update configuration indication information, and/or
Receiving from the second network node at least one of: auxiliary information related to cell selection, second data configuration information, and third information related to configuration.
2. The method according to claim 1, wherein:
the first data configuration information is at least one of the following:
Data configuration update request information, which is information for notifying the second network node of data requesting update of the configuration,
information of the data to be serviced,
the information of the data to be newly created,
the second data configuration information is at least one of the following:
information of the data to be admitted to the server,
the information of the data that is rejected,
information of the data to be configured,
the information of the data to be newly created that is admitted,
rejected information of data to be newly created.
3. The method according to claim 2, wherein:
the information of the data includes at least one of:
the identification information of the data is used to identify,
quality of service QoS information of the data,
an indication of the type of data,
the address information is used to determine the address information,
identification information of the backhaul link channel is input,
the identification information of the backhaul link channel is output,
the route identification information is entered and the route information is transmitted,
the route identification information is output and the route information is received,
packet header indication information for indicating information to be added in the packet header.
4. A method according to claim 3, wherein:
the data identified by the identification information of the data includes at least one of the following types:
the data on one or more of the bearers,
the data on one or more of the tunnels,
Control signaling of the F1 interface,
control signaling associated with the user of the F1 interface,
the F1 interface is not user-associated control signaling,
user plane data of the F1 interface,
data of the non-F1 interface,
data on the association of one or more transport network layers TNL,
the type indicated by the indication information of the data type comprises at least one of the following types:
control signaling of the F1 interface,
control signaling associated with the user of the F1 interface,
the F1 interface is not user-associated control signaling,
user plane data of the F1 interface,
data of the non-F1 interface.
5. The method according to claim 1, wherein:
the candidate information related to cell selection includes at least one of:
the identity information of the target node is used,
information of the candidate serving node(s),
the identity information of the target cell is stored,
the information of the candidate cell is used to determine,
the update configuration indication information includes at least one of:
an indication of the change in configuration is provided,
configuration update information, including updated configuration information,
the access information is provided to the user by means of a network,
the node configuration information is used to determine,
the group update indication information is provided to the user,
the data transmission configuration information is provided in the form of a data transmission configuration information,
the indication of the migration is requested and,
the identity information of the target node is used,
The information of the data to be migrated,
the configuration indication information includes at least one of:
the first interface information is provided in the form of a first interface information,
first information of the connection node including at least one of identification information and address information of the connection node connected to the node,
the service area indication information is used to indicate,
the request information of the migration method is provided,
the assistance information related to cell selection comprises at least one of:
the node configuration information is used to determine,
the identity information of the serving node is used,
the identity information of the serving cell is used,
information of the optional service node(s),
information of the selected cell(s),
the third information related to configuration includes at least one of:
the second interface information is used to provide a second interface information,
reply information of the migration method.
6. The method of claim 5, wherein the service area comprises one or more nodes or comprises one or more cells, and wherein interactions between nodes comprised by the service area or nodes to which the cells belong are enabled to configure data transmission of another node.
7. The method according to claim 5, wherein:
the information of the candidate cell includes at least one of:
The identity information of the cell(s),
the measurement result information of the cell is used,
information on the load of the cell(s),
the identity information of the base station where the cell is located,
the indication of the configuration change includes at least one of:
the indication of the change of the node,
transmitting the indication information of the reconfiguration,
the request indication information of the reconfiguration is transmitted,
transmitting indication information of the reconfigured data,
the configuration update information includes at least one of:
address information of a distribution unit of the base station,
the address information of the parent node is used,
the access information includes at least one of:
the identity information of the cell(s),
the identity information of the serving node is used,
the node configuration information, the first interface information, or the second interface information is used to indicate identification information of a node, and includes at least one of:
the identification information of the node on the non-relevant interface,
the identification information of the node where the non-relevant interface is located,
the identification information of the node on the relevant interface,
the identification information of the node where the relevant interface is located,
identification information of the node for data transmission configuration interactions,
the user identification information of the cell is used,
the identity information of the serving cell is used,
The group update indication information includes at least one of:
the adaptation layer address updates the information,
the transport layer address updates information and,
the backhaul link channel update information is input,
the backhaul link channel update information is output,
the route identification update information is entered and,
the route identification update information is output and,
the header of the packet indicates the update information,
the data transmission configuration information includes at least one of:
header indication information, indicating information to be added in the header,
the information of the IP address of the internet protocol,
the information of the data to be migrated includes at least one of the following:
an indication of the data stream is provided,
the indication information of the tunnel is provided to the user,
the identification information of the bearer is provided,
the address information of the transport layer is transmitted,
the identification information of the route is transmitted,
the address information of the adaptation layer,
8. the method of claim 7, wherein:
the indication information of the transmission of the reconfigured data includes at least one of:
indication information of the data stream, identification information of the data stream to which the data requiring reconfiguration belongs,
the indication information of the tunnel is provided to the user,
transmitting the indication information of the network layer associated TNL association,
the identification information of the bearer is provided,
The address information of the transport layer is transmitted,
the identification information of the route is transmitted,
address information of the adaptation layer.
9. The method of any of the preceding claims, wherein the first network node is one of a first node acting as a relay node, a second node interfacing with the first node, a third node in radio resource control, RRC, connection with the first node, and a fourth node in RRC connection with the first node, and
the second network node is a different one of the first node, the second node, the third node, and the fourth node than the first network node.
10. A method performed by a second network node in a communication system, comprising:
receiving from a first network node at least one of: candidate information related to cell selection, first data configuration information, update configuration indication information, and/or
Transmitting to the first network node at least one of: auxiliary information related to cell selection, second data configuration information, and third information related to configuration.
11. The method according to claim 10, wherein:
the first data configuration information is at least one of the following:
Data configuration update request information, which is information for notifying the second network node of data requesting update of the configuration,
information of the data to be serviced,
the information of the data to be newly created,
the second data configuration information is at least one of the following:
information of the data to be admitted to the server,
the information of the data that is rejected,
information of the data to be configured,
the information of the data to be newly created that is admitted,
rejected information of data to be newly created.
12. The method according to claim 11, wherein:
the information of the data includes at least one of:
the identification information of the data is used to identify,
quality of service QoS information of the data,
an indication of the type of data,
the address information is used to determine the address information,
identification information of the backhaul link channel is input,
the identification information of the backhaul link channel is output,
the route identification information is entered and the route information is transmitted,
the route identification information is output and the route information is received,
packet header indication information for indicating information to be added in the packet header.
13. The method according to claim 12, wherein:
the data identified by the identification information of the data includes at least one of the following types:
the data on one or more of the bearers,
the data on one or more of the tunnels,
Control signaling of the F1 interface,
control signaling associated with the user of the F1 interface,
the F1 interface is not user-associated control signaling,
user plane data of the F1 interface,
data of the non-F1 interface,
data on the association of one or more transport network layers TNL,
the type indicated by the indication information of the data type comprises at least one of the following types:
control signaling of the F1 interface,
control signaling associated with the user of the F1 interface,
the F1 interface is not user-associated control signaling,
user plane data of the F1 interface,
data of the non-F1 interface.
14. The method according to claim 10, wherein:
the candidate information related to cell selection includes at least one of:
the identity information of the target node is used,
information of the candidate serving node(s),
the identity information of the target cell is stored,
the information of the candidate cell is used to determine,
the update configuration indication information includes at least one of:
an indication of the change in configuration is provided,
configuration update information, including updated configuration information,
the access information is provided to the user by means of a network,
the node configuration information is used to determine,
the group update indication information is provided to the user,
the data transmission configuration information is provided in the form of a data transmission configuration information,
the indication of the migration is requested and,
the identity information of the target node is used,
The information of the data to be migrated,
the configuration indication information includes at least one of:
the first interface information is provided in the form of a first interface information,
first information of the connection node including at least one of identification information and address information of the connection node connected to the node,
the service area indication information is used to indicate,
the request information of the migration method is provided,
the assistance information related to cell selection comprises at least one of:
the node configuration information is used to determine,
the identity information of the serving node is used,
the identity information of the serving cell is used,
information of the optional service node(s),
information of the selected cell(s),
the third information related to configuration includes at least one of:
the second interface information is used to provide a second interface information,
reply information of the migration method.
15. The method of claim 14, wherein the service area comprises one or more nodes or comprises one or more cells, and wherein interactions between nodes comprised by the service area or nodes to which the cells belong are enabled to configure data transmission of another node.
16. The method according to claim 14, wherein:
the information of the candidate cell includes at least one of:
The identity information of the cell(s),
the measurement result information of the cell is used,
information on the load of the cell(s),
the identity information of the base station where the cell is located,
the indication of the configuration change includes at least one of:
the indication of the change of the node,
transmitting the indication information of the reconfiguration,
the request indication information of the reconfiguration is transmitted,
transmitting indication information of the reconfigured data,
the configuration update information includes at least one of:
address information of a distribution unit of the base station,
the address information of the parent node is used,
the access information includes at least one of:
the identity information of the cell(s),
the identity information of the serving node is used,
the node configuration information, the first interface information, or the second interface information is used to indicate identification information of a node, and includes at least one of:
the identification information of the node on the non-relevant interface,
the identification information of the node where the non-relevant interface is located,
the identification information of the node on the relevant interface,
the identification information of the node where the relevant interface is located,
identification information of the node for data transmission configuration interactions,
the user identification information of the cell is used,
the identity information of the serving cell is used,
The group update indication information includes at least one of:
the adaptation layer address updates the information,
the transport layer address updates information and,
the backhaul link channel update information is input,
the backhaul link channel update information is output,
the route identification update information is entered and,
the route identification update information is output and,
the header of the packet indicates the update information,
the data transmission configuration information includes at least one of:
header indication information, indicating information to be added in the header,
the IP address information is used to determine,
the information of the data to be migrated includes at least one of the following:
an indication of the data stream is provided,
the indication information of the tunnel is provided to the user,
the identification information of the bearer is provided,
the address information of the transport layer is transmitted,
the identification information of the route is transmitted,
address information of the adaptation layer.
17. The method according to claim 16, wherein:
the indication information of the transmission of the reconfigured data includes at least one of:
indication information of the data stream, identification information of the data stream to which the data requiring reconfiguration belongs,
the indication information of the tunnel is provided to the user,
transmitting the indication information of the network layer associated TNL association,
the identification information of the bearer is provided,
the address information of the transport layer is transmitted,
The identification information of the route is transmitted,
address information of the adaptation layer.
18. The method of any of claims 10-17, wherein the first network node is one of a first node that is a relay node, a second node that interfaces with the first node, a third node that RRC connects with the first node, and a fourth node that RRC connects with the first node, and
the second network node is a different one of the first node, the second node, the third node, and the fourth node than the first network node.
19. A first network node in a communication system, comprising:
a transceiver; and
a processor coupled with the transceiver and configured to perform the method of any of claims 1-9.
20. A second network node in a communication system, comprising:
a transceiver; and
a processor coupled with the transceiver and configured to perform the method of any of claims 10-18.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210059900.8A CN116506866A (en) | 2022-01-19 | 2022-01-19 | Mechanism for node movement and corresponding node |
| KR1020220170271A KR20230112044A (en) | 2022-01-19 | 2022-12-08 | Method and apparatus for node movement and corresponding node |
| PCT/KR2022/021291 WO2023140521A1 (en) | 2022-01-19 | 2022-12-26 | Method and apparatus for node movement and corresponding node |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210059900.8A CN116506866A (en) | 2022-01-19 | 2022-01-19 | Mechanism for node movement and corresponding node |
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| CN116506866A true CN116506866A (en) | 2023-07-28 |
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| CN202210059900.8A Pending CN116506866A (en) | 2022-01-19 | 2022-01-19 | Mechanism for node movement and corresponding node |
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| Country | Link |
|---|---|
| KR (1) | KR20230112044A (en) |
| CN (1) | CN116506866A (en) |
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- 2022-01-19 CN CN202210059900.8A patent/CN116506866A/en active Pending
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