CN114765823B

CN114765823B - Node switching method and device

Info

Publication number: CN114765823B
Application number: CN202110057746.6A
Authority: CN
Inventors: 刘子乔; 谌丽; 孙建成
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2021-01-15
Filing date: 2021-01-15
Publication date: 2024-01-26
Anticipated expiration: 2041-01-15
Also published as: CN114765823A

Abstract

The invention provides a node switching method and device, and relates to the technical field of wireless communication. The migration node receives first configuration information sent by a first CU of a source host node which is accessed currently; accessing a target node according to the first configuration information; storing the context information of the access equipment accessed to the migration node; after the access target node is accessed, the stored context information of the access equipment is used for communication with the access equipment; the first configuration information is returned by the second CU after the first CU sends a switching request to the second CU of the target host node, wherein the switching request carries the context information of the migration node, or the switching request carries the context information of the migration node and the access equipment thereof; the target node is a node connected with the target host node, or the target node is a node connected with a descendant node of the target host node. The embodiment of the invention provides a scheme for switching the nodes among CUs, and improves the system performance.

Description

Node switching method and device

Technical Field

The present invention relates to the field of wireless communications technologies, and in particular, to a method and an apparatus for node switching.

Background

The integrated access backhaul (Integrated Access and Backhaul, IAB) network technology achieves the purpose of expanding the coverage of a base station by relaying wireless signals among a plurality of nodes. The IAB network technology is a network networking mode that solves the base station coverage problem in the fifth generation (5th Generation,5G) in the future.

With the introduction of the IAB technology, it is not necessary that every User Equipment (UE) establishes a connection with a Centralized Unit (CU), and the UE only needs to connect to the IAB node, and an IAB host (node) uniformly manages each IAB node and directly communicates with the core network. Currently, an IAB node accessing an IAB host node can be switched in a CU of the same IAB host node; for example, if IAB node 1, IAB node 2 access IAB hosting node, and IAB node 3 access IAB node 1, then IAB node 3 may switch from IAB node to IAB node 2.

However, at present, when an IAB node is switched, the IAB node can only be switched between nodes in the same CU, and there is no scheme for switching between different CUs.

Disclosure of Invention

The invention provides a node switching method and device, which are used for providing a scheme for switching IAB nodes among different CUs.

In a first aspect, an embodiment of the present invention provides a node switching method, including:

the migration node receives first configuration information sent by a first CU of a source host node which is accessed currently;

the migration node accesses a target node according to the first configuration information;

after the migration node is accessed to the target node, the migration node communicates with the access equipment by using the context information of the access equipment accessed to the migration node; the context information of the access device is obtained by the migration node from a context establishment procedure for the access device, and the context establishment procedure is performed between the migration node and the first CU;

the first configuration information is returned by a second CU of a target host node after the first CU sends a handover request to the second CU, where the handover request carries context information of the migration node, or the handover request carries context information of the migration node and the access device thereof; the target node is a node connected with the target host node, or the target node is a node connected with a descendant node of the target host node.

In a second aspect, an embodiment of the present invention provides a node switching method, including:

the second CU of the target host node receives a switching request sent by the first CU of the source host node; the switching request carries the context information of the migration node, or the switching request carries the context information of the migration node and the access equipment accessed to the migration node;

the second CU returns first configuration information of the migration node to the first CU, so that the first CU sends the first configuration information to the migration node, the migration node accesses a target node according to the first configuration information, and after the target node is accessed, the second CU uses context information of the access device to communicate with the access device; the context information of the access device is obtained by the migration node from a context establishment procedure for the access device, and the context establishment procedure is performed between the migration node and the first CU;

the migration node is a node connected with the source host node before switching; the target node is a node connected with the target host node, or the target node is a node connected with a descendant node of the target host node.

In a third aspect, an embodiment of the present invention provides a node switching method, including:

the first centralized unit CU of the source host node sends a switching request to the second CU of the target host node; the switching request carries the context information of the migration node, or the switching request carries the context information of the migration node and the access equipment thereof;

the first CU receives first configuration information of the migration node returned by the second CU and sends the first configuration information to the migration node so that the migration node accesses a target node according to the first configuration information;

In a fourth aspect, an embodiment of the present invention provides a node switching method, including:

the access node receives second configuration information sent by an accessed migration node;

the access node reconfigures according to the second configuration information and establishes connection with a second CU of the target host node through a DU;

The migration node is a node which needs to be switched from a first CU of a source host node to the second CU, and the second configuration information is returned by the second CU after the first CU sends a switching request to the second CU.

In a fifth aspect, an embodiment of the present invention provides a migration node, including a memory, a transceiver, and a processor:

a memory for storing a computer program;

a transceiver for transceiving data under control of the processor;

a processor for reading the computer program in the memory and performing the following operations:

receiving first configuration information sent by a first CU of a source host node which is accessed currently;

accessing a target node according to the first configuration information;

after the target node is accessed, the context information of the access equipment accessed to the migration node is used for communicating with the access equipment; the context information of the access device is obtained by the migration node from a context establishment procedure for the access device, and the context establishment procedure is performed between the migration node and the first CU;

In a sixth aspect, an embodiment of the present invention provides a second CU located at a target host node, including a memory, a transceiver, and a processor:

a memory for storing a computer program;

a transceiver for transceiving data under control of the processor;

receiving a switching request sent by a first CU of a source host node; the switching request carries the context information of the migration node, or the switching request carries the context information of the migration node and the access equipment accessed to the migration node;

returning the first configuration information of the migration node to the first CU, so that the first CU sends the first configuration information to the migration node, the migration node accesses a target node according to the first configuration information, and after the target node is accessed, the migration node uses the context information of the access equipment to communicate with the access equipment; the context information of the access device is obtained by the migration node from a context establishment procedure for the access device, and the context establishment procedure is performed between the migration node and the first CU;

In a seventh aspect, an embodiment of the present invention provides a first CU located at a source hosting node, including a memory, a transceiver, and a processor:

a memory for storing a computer program;

a transceiver for transceiving data under control of the processor;

sending a switching request to a second CU of the target host node; the switching request carries the context information of the migration node, or the switching request carries the context information of the migration node and the access equipment thereof;

receiving first configuration information of the migration node returned by the second CU, and sending the first configuration information to the migration node so that the migration node accesses a target node according to the first configuration information;

In an eighth aspect, an embodiment of the present invention provides an access node, including a memory, a transceiver, and a processor:

a memory for storing a computer program;

a transceiver for transceiving data under control of the processor;

receiving second configuration information sent by an accessed migration node;

reconfiguring according to the second configuration information, and establishing connection with a second CU of the target host node through a DU;

In a ninth aspect, an embodiment of the present invention provides a node switching apparatus, including:

the first receiving unit is used for receiving first configuration information sent by a first CU of a source host node which is accessed currently;

the processing unit is used for accessing the target node according to the first configuration information;

a storage unit, configured to communicate with an access device accessing the migration node using context information of the access device after accessing the target node; the context information of the access device is obtained by the migration node from a context establishment procedure for the access device, and the context establishment procedure is performed between the migration node and the first CU;

In a tenth aspect, an embodiment of the present invention provides a node switching apparatus, including:

the second receiving unit is used for receiving a switching request sent by the first CU of the source host node; the switching request carries the context information of the migration node, or the switching request carries the context information of the migration node and the access equipment accessed to the migration node;

a first sending unit, configured to return first configuration information of the migration node to the first CU, so that the first CU sends the first configuration information to the migration node, the migration node accesses a target node according to the first configuration information, and after accessing the target node, uses context information of an access device accessing the migration node to communicate with the access device; the context information of the access device is obtained by the migration node from a context establishment procedure for the access device, and the context establishment procedure is performed between the migration node and the first CU;

In an eleventh aspect, an embodiment of the present invention provides a node switching apparatus, including:

a second sending unit, configured to send a handover request to a second CU of the target hosting node; the switching request carries the context information of the migration node, or the switching request carries the context information of the migration node and the access equipment thereof;

the third receiving unit is used for receiving first configuration information of the migration node returned by the second CU and sending the first configuration information to the migration node so that the migration node accesses a target node according to the first configuration information;

In a twelfth aspect, an embodiment of the present invention provides a node switching apparatus, including:

a fourth receiving unit, configured to receive second configuration information sent by the accessed migration node;

a connection establishment unit, configured to reconfigure according to the second configuration information, and establish a connection with a second CU of the target host node through a DU;

In a thirteenth aspect, an embodiment of the present invention provides a processor-readable storage medium, where a computer program is stored, where the computer program is configured to cause the processor to perform the method according to the first, second, third, or fourth aspect.

When the migration node needs to be switched from the first CU of the source host node which is currently accessed to the second CU of the target host node, the first CU sends a switching request to the second CU, and the switching request can comprise the context information of the migration node or the switching request comprises the context information of the migration node and the context information of the access equipment which is accessed to the migration node; after receiving the switching request, the second CU determines that the migration node needs to access the target node, returns first configuration information to the first CU, and accesses the target node after receiving the first configuration information sent by the first CU; and the migration node stores the context information of the access device when accessing the target node, so that after the migration node accesses the target node, the context information of the access device can be used for communication with the access device, and the context information of the access device is obtained by the migration node from a context establishment process for the access device, wherein the context establishment process of the access device is performed between the migration node and the first CU. The embodiment of the invention provides a scheme for switching the nodes among CUs, so that the system performance is improved; and the context information of the access equipment accessed to the migration node is reserved after the migration node is switched, so that the context establishment process of the access equipment between the second CU and the migration node is not needed after the migration node is switched to the second CU, thereby simplifying the switching flow and saving system resources.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention and do not constitute a undue limitation on the invention.

Fig. 1 is a schematic diagram of an IAB network architecture provided in an embodiment of the present application;

fig. 2 is a schematic diagram of an IAB network architecture provided in an embodiment of the present application;

fig. 3 is a schematic diagram of an IAB network architecture provided in an embodiment of the present application;

fig. 4 is a schematic system structure diagram of node switching according to an embodiment of the present application;

fig. 5 is a schematic diagram of a network architecture according to an embodiment of the present application;

fig. 6 is a node switching flowchart provided in an embodiment of the present application;

fig. 7 is a schematic diagram of a network architecture according to an embodiment of the present application;

fig. 8 is a node switching flowchart provided in an embodiment of the present application;

fig. 9 is a node switching flowchart provided in an embodiment of the present application;

fig. 10 is a schematic diagram of a network architecture according to an embodiment of the present application;

fig. 11 is a node switching flowchart provided in an embodiment of the present application;

fig. 12 is a node switching flowchart provided in an embodiment of the present application;

Fig. 13 is a schematic structural diagram of a migration node according to an embodiment of the present application;

fig. 14 is a schematic structural diagram of a second CU located at a target host node according to an embodiment of the present application;

fig. 15 is a schematic structural diagram of a first CU located at a source host node according to an embodiment of the present application;

fig. 16 is a schematic structural diagram of an access node according to an embodiment of the present application;

fig. 17 is a schematic structural diagram of a node switching device according to an embodiment of the present application;

fig. 18 is a schematic structural diagram of a node switching device according to an embodiment of the present application;

fig. 19 is a schematic structural diagram of a node switching device according to an embodiment of the present application;

fig. 20 is a schematic structural diagram of a node switching device according to an embodiment of the present application;

fig. 21 is a flowchart of a node switching method provided in an embodiment of the present application;

fig. 22 is a flowchart of a node switching method provided in an embodiment of the present application;

fig. 23 is a flowchart of a node switching method provided in an embodiment of the present application;

fig. 24 is a flowchart of a node switching method according to an embodiment of the present application.

Detailed Description

The term "plurality" in embodiments of the present invention means two or more, and other adjectives are similar.

In the embodiment of the invention, the term "and/or" describes the association relation of the association objects, which means that three relations can exist, for example, a and/or B can be expressed as follows: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, and it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The technical scheme provided by the embodiment of the invention can be suitable for various systems, in particular to a 5G system. For example, suitable systems may be global system for mobile communications (global system of mobile communication, GSM), code division multiple access (code division multiple access, CDMA), wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) universal packet Radio service (General Packet Radio Service, GPRS), long term evolution (Long Term Evolution, LTE), LTE frequency division duplex (Frequency Division Duplex, FDD), LTE time division duplex (Time Division Duplex, TDD), long term evolution-advanced (Long Term Evolution Advanced, LTE-a), universal mobile system (Universal Mobile Telecommunication System, UMTS), worldwide interoperability for microwave access (Worldwide interoperability for Microwave Access, wiMAX), 5G New air interface (New Radio, NR), and the like. Terminal devices and network devices are included in these various systems. Core network parts such as evolved packet system (Evloved Packet System, EPS), 5G system (5 GS) etc. may also be included in the system.

The terminal device according to the embodiment of the present invention may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem, etc. The names of the terminal devices may also be different in different systems, for example in a 5G system, the terminal devices may be referred to as User Equipment (UE). The wireless terminal device may communicate with one or more Core Networks (CNs) via a radio access Network (Radio Access Network, RAN), which may be mobile terminal devices such as mobile phones (or "cellular" phones) and computers with mobile terminal devices, e.g., portable, pocket, hand-held, computer-built-in or vehicle-mounted mobile devices that exchange voice and/or data with the radio access Network. Such as personal communication services (Personal Communication Service, PCS) phones, cordless phones, session initiation protocol (Session Initiated Protocol, SIP) phones, wireless local loop (Wireless Local Loop, WLL) stations, personal digital assistants (Personal Digital Assistant, PDAs), and the like. The wireless Terminal Device may also be referred to as a system, subscriber Unit (Subscriber Unit), subscriber Station (Subscriber Station), mobile Station (Mobile Station), remote Station (Remote Station), access Point (Access Point), remote Terminal Device (Remote Terminal), access Terminal Device (Access Terminal), user Terminal Device (User Terminal), user Agent (User Agent), user equipment (User Device), and embodiments of the present invention are not limited.

The network architecture and the service scenario described in the embodiments of the present invention are for more clearly describing the technical solution of the embodiments of the present invention, and do not constitute a limitation on the technical solution provided by the embodiments of the present invention, and those skilled in the art can know that, with the evolution of the network architecture and the appearance of the new service scenario, the technical solution provided by the embodiments of the present invention is applicable to similar technical problems.

To facilitate an understanding of the embodiments of the present invention, an IAB network topology diagram as shown in fig. 1 is first described.

In an IAB network deployment, it consists of an IAB donor (IAB host node or central control node), an IAB node (node) and a UE. The IAB node is used for connecting a core network, transmitting information of the IAB node and the UE back to the core network, and transmitting information of the core network to the IAB node and the UE. The IAB donor is also responsible for managing the IAB node in the entire IAB network.

The IAB node relays information of the UE to the IAB donor over a radio link (Uu interface) and relays information of the IAB donor to the UE. The connection between the IAB nodes and between the IAB node and the IAB donor is through a wireless link, namely Uu interface.

The relay function of the IAB node is implemented by a BAP layer (Backhaul Adaptation Protocol layer, adaptive backhaul protocol layer) in the IAB node.

As shown in fig. 1, in the IAB network, IAB node 1 directly accesses a node of IAB donor, IAB node 2 and IAB node3 are offspring nodes of IAB node 1, UE 1 accesses IAB node 1, and UE2 accesses IAB node 2.

In the existing IAB network topology, as shown in fig. 2, the IAB donor includes a CU and a DU, where the CU includes a CU-CP (Control Plane) of a Control Plane and a CU-UP (User Plane) of a User Plane; each IAB node in the IAB network topology is also composed of two parts, one part being an MT (Mobile Termination, mobile terminal) unit and the other part being a DU.

As shown in fig. 3, in the IAB network, IAB node a and IAB node b are nodes accessing IAB donor 1, and IAB node c and IAB node d are nodes accessing IAB donor 2; and IAB node e and IAB node f are descendant nodes of IAB node b; IAB node g and IAB node h are descendant nodes of IAB node d. Currently, when the IAB node e needs to perform a handover, the IAB node e can only switch to a node connected to the first CU, for example, the IAB node e may switch to the IAB node a or switch to a direct connection to the IAB node 1.

The embodiment of the invention provides a node switching scheme which can realize that IAB nodes can be switched among different UCs; for example, according to the node switching scheme provided by the embodiment of the present invention, when the IAB node e needs to perform switching, the IAB node e may switch to a node connected to the second CU, for example, the IAB node e may access IAB node 2, or may access any one of IAB node c, IAB node d, IAB node g, and IAB node h.

The node switching scheme provided by the embodiment of the invention is described in further detail below.

As shown in fig. 4, an embodiment of the present invention provides a system for node switching, including a migration node 10, a source host node 20 accessed before the migration node 10 is switched, a first CU 21 of the source host node 20, a target host node 30 accessed after the migration node 10 is switched, a second CU 31 of the target host node 30, and a target node 32 accessed after the migration node 10 is switched to the second CU 31.

A first CU 21, configured to send a handover request to a second CU of the target hosting node; and receiving first configuration information of the migration node returned by the second CU, and sending the first configuration information to the migration node so that the migration node accesses the target node according to the first configuration information.

The migration node 10 is configured to receive first configuration information sent by a first CU of a source hosting node currently accessed, and access a target node according to the first configuration information; after the access target node is accessed, the context information of the access equipment of the access migration node is used for communicating with the access equipment; the context information of the access device is stored by the migration node prior to accessing the target node.

A second CU 31, configured to receive a handover request sent by a first CU of a source hosting node; and returning the first configuration information of the migration node to the first CU, so that the first CU sends the first configuration information to the migration node, and the migration node accesses the target node according to the first configuration information.

The migration node is a node connected with the source host node before switching; the target node is a node connected with the target host node, or the target node is a node connected with a descendant node of the target host node; the switching request carries the context information of the migration node, or the switching request carries the context information of the migration node and the access equipment thereof.

In the embodiment of the invention, one or more nodes of a first CU accessing a source host node measure signals of other nodes to obtain measurement information for measuring the other nodes, and the obtained measurement information is reported to the first CU;

wherein the other nodes may include nodes connected to the first CU, nodes connected to other CUs in addition to the first CU;

it should be noted that, when a node makes measurements on other nodes, the measured node range may be that the first CU notifies the node.

After receiving measurement information reported by one or more nodes, the first CU determines a migration node needing to be switched according to the received measurement information; in addition, the first CU determines a target node to which the migration node is connected after switching according to measurement information reported by the migration node.

For the migration node, if the target node accessed after the first CU is switched is a node connected to the second CU of the target host node, an optional implementation manner of measurement reporting by the migration node is as follows:

the migration node measures signals of other nodes to obtain measurement information for representing signal quality of the signals of the other nodes; wherein the other nodes comprise at least nodes connected with the target host node; and the migration node reports the measured measurement information to the first CU, so that the first CU determines to switch the migration node to the target node according to the measurement information.

When the migration node measures other nodes, the migration node can measure various types of signals of the other nodes; for example, the migration node may measure reference signals of other nodes, and signal-to-noise ratios of the reference signals of other nodes are measured to obtain measurement information.

After the first CU determines to switch the migration node to a second CU of the target host node, the first CU sends a switching request to the second CU;

the switching request comprises context information of the migration node; in addition, if the access equipment for accessing the migration node exists, the context information of the equipment can be accessed in the switching request;

The access device accessing the mobility node may be a node and/or a UE.

It should be noted that, when there is an access device accessing the migration node, the first CU may send a handover request to the second CU for the migration node and the access device, respectively; for example, the handover request for the mobility node includes context information of the mobility node, and the handover request for the access device includes context information of the access device. Or, the handover request sent by the first CU to the second CU includes the context information of the migration node and the context information of the access device at the same time.

An optional implementation manner is that the handover request may further include identification information of a target node to which the migration node accesses after the handover.

After receiving a switching request sent by the first CU, the second CU initiates a context establishment request containing context information of the migration node to the target node; the target node sends a context establishment response to the second CU;

after receiving a context establishment response sent by a target node, the second CU generates first configuration information of the migration node and sends the generated first configuration information to the first CU;

in an alternative way, the second CU returns a handover response message to the first CU, where the handover response message includes first configuration information of the migration node; the first CU sends the first configuration information of the migration node to the migration node.

If the node accessed by the migration node is a descendant node of the source host node, the first CU sends downlink radio resource control (Radio Resource Control, RRC) transfer information to the node accessed by the migration node, and the node accessed by the migration node analyzes first configuration information of the migration node from the downlink RRC transfer information and sends the first configuration information to the migration node.

After receiving the first configuration information, the migration node accesses the target node;

an alternative way for the migration node to access the target node is:

the migration node performs reconfiguration according to the first configuration information, and the migration node establishes connection with the second CU;

in the implementation, the MT unit of the migration node is reconfigured according to the first configuration information; and the DU of the migration node establishes a connection with the second CU.

Alternatively, the connection established between the DU of the migration node and the second CU may be an F1 connection.

After the migration node establishes connection with the second CU, the migration node reserves the context information of the access equipment accessed to the migration node;

after the migration node is accessed to the target node, the migration node communicates with the access equipment by using the context information of the access equipment;

wherein the context information of the access device is obtained by the migration node from a context establishment procedure for the access device, and the context establishment procedure is performed between the migration node and the first CU.

Because the access equipment is equipment for accessing the migration node, when the migration node is connected with the first CU of the source host node, a context establishment process is carried out between the migration node and the first CU aiming at the access equipment, and the migration node can obtain the context information of the access equipment in the context establishment process aiming at the access equipment;

it should be noted that, in the embodiment of the present invention, the migration node may obtain the context information of the access device from one or more messages in the context establishment process for the access device, which is not limited in the embodiment of the present invention; for example, the migration node may obtain the context information of the access device from the first CU in a context setup complete message sent for the context setup procedure of the access device.

After the migration node is switched into the target node, the context of the access device does not need to be deleted, so that after the migration node is switched into the target node, the context establishment process of the access device between the second CU and the migration node is not needed because the context information of the access device is reserved after the migration node is switched.

After the MT unit of the migration node reconfigures according to the first configuration information, the migration node sends a reconfiguration completion message to the target node accessed after the switching, and the target node sends the reconfiguration completion message of the migration node to the second CU.

In addition, if the switching request sent by the first CU to the second CU contains the context information of the access device of the access migration node, the second CU returns second configuration information of the access device to the first CU;

in the implementation, the second CU generates second configuration information of the access equipment of the access migration node, and returns the second configuration information of the access equipment to the first CU;

and the first CU sends the second configuration information to the access equipment, and the access equipment reconfigures according to the second configuration information.

Optionally, the first CU sends the second configuration information to the migration node, and the migration node sends the second configuration information to the access device.

After the access device reconfigures according to the second configuration information, the access device sends a reconfiguration completion message to the migration node, and the migration node sends the reconfiguration completion message of the access device to the second CU.

After the MT of the migration node completes reconfiguration and the DU of the migration node and the second CU establish F1 connection, the migration node accesses the target node; after the migration node accesses the target node, the second CU sends a context modification request to the migration node; the context modification request comprises updated uplink transmission address information of the access equipment;

And the migration node updates an uplink transmission path after the access equipment is switched to the second CU according to the uplink transmission address information, and returns a context modification response to the second CU.

The uplink transport address information in the embodiment of the present invention may be uplink user plane transport network layer (Uplink User Plane Transport Network Layer, UL UP TNL) information.

After the access node reconfigures according to the second configuration information, connection is established between the access node and the second CU of the target host node through the DU of the access node.

After the above procedure is completed, the embodiment of the present invention switches the migration node, or the migration node and the access device of the migration node to which the migration node is connected, from the first CU to the second CU.

The following details of the node switching procedure according to the embodiment of the present invention are described in conjunction with the specific embodiments:

example 1,

The network architecture shown in fig. 5 comprises a first host node and a second host node; wherein the first host node comprises a first CU and a first DU and the second host node comprises a second CU and a second DU; IAB node 1 is accessed to the first host node, IAB node 2 and IAB node 3 are accessed to the second host node; IAB node4 and IAB node 5 access IAB node 1.

The node switching process shown in fig. 6 specifically includes the following steps:

Step S601, a first CU receives measurement information reported by IAB node 1, IAB node 4 and IAB node 5;

the measurement information is obtained by measuring other nodes by IAB node 1, IAB node 4, and IAB node 5, respectively.

In step S602, the first CU determines, according to the received measurement information, that the IAB node 5 needs to be switched to the IAB node 2 to which the second host node is connected.

Step S603, the first CU sends a switching request to the second CU;

the switching request carries the context information of the IAB node 5 and the identification information of the IAB node 2 accessed after the IAB node 5 is switched;

the handover request may be Xn HANDOVER REQUEST.

Step S604, after receiving the switching request, the second CU initiates a context establishment request to the IAB node 2;

the context establishment request carries the context information of the IAB node 5; the context setup request may be CONTEXT SETUP RRQUEST.

Step S605, IAB node 2 returns a context setup response to the second CU after setting up the context of IAB node 5;

where the context setup response may be CONTEXT SETUP RESPONSE.

Step S606, the second CU returns a switching request confirmation message to the first CU, wherein the switching request confirmation message carries RRC reconfiguration information of IAB node 5;

The handover request confirm message may be Xn HANDOVER REQUEST ACK.

Step S607, the first CU sends downlink RRC transfer information to the IAB node 1;

the downlink RRC transfer information may be DL RRC transfer message.

In step S608, the IAB node 1 analyzes the RRC reconfiguration information of the IAB node 5 from the downlink RRC transfer information, and sends the RRC reconfiguration information to the IAB node 5.

In step S609, the MT unit of IAB node 5 performs reconfiguration according to the received RRC reconfiguration information, and sends a reconfiguration complete message to IAB node 2.

Step S610, IAB node 2 sends a reconfiguration complete message of IAB node 5 to the second CU.

Step S611, the DU of IAB node 5 establishes an F1 connection with the second CU.

The execution order of steps S609, S610 and S611 is not limited.

EXAMPLE 2,

The network architecture shown in fig. 7 comprises a first host node and a second host node; wherein the first host node comprises a first CU and a first DU and the second host node comprises a second CU and a second DU; IAB node 1 is accessed to the first host node, IAB node 2 and IAB node 3 are accessed to the second host node; IAB node4 and IAB node 5 are connected with IAB node 1; IAB node 6 accesses IAB node 5.

For the network structure shown in fig. 7, two alternative node switching flows are provided in the embodiment of the present invention; the first node switching flow is shown in fig. 8, and includes:

step S801, the first CU receives measurement information reported by IAB node 1, IAB node 4, IAB node 5, and IAB node 6;

the measurement information is obtained by measuring the other nodes by the IAB node 1, the IAB node 4, the IAB node 5, and the IAB node6, respectively.

Step S802, the first CU determines, according to the received measurement information, that the IAB node 5 needs to be switched to the IAB node 2 to which the second host node is connected.

Step S803, the first CU sends a first handover request to the second CU;

the first switching request carries the context information of the IAB node 5 and the first switching request carries the identification information of the IAB node 2 which is accessed after the IAB node 5 is switched;

the first handover request may be Xn HANDOVER REQUEST.

Step S804, after receiving the first switching request, the second CU initiates a context establishment request to the IAB node 2;

Step S805, after the IAB node 2 establishes the context of the IAB node 5, returns a context establishment response to the second CU;

Where the context setup response may be CONTEXT SETUP RESPONSE.

Step S806, the second CU returns a first switching request confirmation message to the first CU, wherein the first switching request confirmation message carries RRC reconfiguration information of IAB node 5;

the first handover request confirm message may be Xn HANDOVER REQUEST ACK.

Step S807, the first CU sends downlink RRC transfer information to the IAB node 1;

the downlink RRC transfer information may be DL RRC transfer message.

In step S808, the IAB node 1 analyzes the RRC reconfiguration information of the IAB node 5 from the downlink RRC transfer information, and sends the RRC reconfiguration information to the IAB node 5.

In step S809, the MT unit of IAB node 5 performs reconfiguration according to the received RRC reconfiguration information, and sends a reconfiguration complete message to IAB node 2.

Step S810, IAB node 2 sends an IAB node 5 reconfiguration complete message to the second CU.

Step S811, the DU of IAB node 5 establishes an F1 connection with the second CU and retains the context information of IAB node 6, so that after the IAB node 5 is switched to IAB node 2, the context establishment procedure of IAB node 6 between the second CU and IAB node 5 is not required.

The order of execution between step S809 to step S810 and step S811 is not limited; the second CU may add new routing information and mapping criteria on the new path (second CU, second DU, IAB node 2) after sending the context setup request to IAB node 2; alternatively, the second CU, after receiving the reconfiguration complete message of IAB node 5, adds new routing information and mapping criteria on the new path (second CU, second DU, IAB node 2).

Step S812, the first CU sends a second handover request to the second CU;

the second handover request carries the context information of the IAB node 6.

Step S813, the second CU sends a context modification request to the IAB node 5; wherein the context modification request contains updated UL UP TNL information of IAB node 6;

the context modification request may be CONTEXT MODIFICATION REQUEST.

Step S814, the IAB node 5 updates the uplink transmission path after the IAB node 6 is switched to the second CU according to the UL UP TNL information;

note that, since the IAB node 5 retains the context information of the IAB node 6 after accessing the IAB node 2, the process of establishing the context of the IAB node 6 between the second CU and the IAB node 5 is not required, and the IAB node 5 only needs to switch the IAB node 6 to the upstream destination address after the second CU.

Step S815, the IAB node 5 sends a context modification response message to the second CU;

wherein the context modification response message may be CONTEXT MODIFICATION RESPONSE.

In step S816, the second CU returns a second handover request confirm message to the first CU, where the second handover request confirm message carries RRC reconfiguration information of IAB node 6.

Step S817, the IAB node 6 receives the RRC reconfiguration information;

For example, IAB node6 may receive RRC reconfiguration information through a target path of IAB node 5.

Step S818, the IAB node6 performs reconfiguration according to the RRC reconfiguration information.

Step S819, IAB node6 sends a reconfiguration complete message to the second CU.

Step S820, the DU of IAB node6 establishes an F1 connection with the second CU.

The second node switching flow is shown in fig. 9, and includes:

step S901, the first CU receives measurement information reported by IAB node 1, IAB node 4, IAB node 5, and IAB node 6;

In step S902, the first CU determines, according to the received measurement information, that it is necessary to switch the IAB node 5 to the IAB node 2 to which the second home node is connected.

Step S903, the first CU sends a handover request to the second CU;

the handover request carries context information of the IAB node 5 and context information of the IAB node6, and the handover request carries identification information of an IAB node 2 accessed after the IAB node 5 is switched;

the handover request may be Xn HANDOVER REQUEST.

Step S904, after receiving the switching request, the second CU initiates a context establishment request to the IAB node 2;

Step S905, IAB node 2 returns a context setup response to the second CU after setting up the context of IAB node 5;

where the context setup response may be CONTEXT SETUP RESPONSE.

Step S906, the second CU returns a switching request confirmation message to the first CU, wherein the first switching request confirmation message carries RRC reconfiguration information of IAB node 5 and RRC reconfiguration information of IAB node 6;

the handover request confirm message may be Xn HANDOVER REQUEST ACK.

Step S907, the first CU sends downlink RRC transfer information to the IAB node 1;

the downlink RRC transfer information may be DL RRC transfer message.

In step S908, the IAB node 1 analyzes the RRC reconfiguration information of the IAB node 5 and the RRC reconfiguration information of the IAB node6 from the downlink RRC transfer information, and sends the RRC reconfiguration information and the RRC reconfiguration information of the IAB node6 to the IAB node 5.

Step S909, IAB node 5 transmits the RRC reconfiguration information of IAB node6 to IAB node 6.

In this embodiment, an optional implementation manner is that the RRC reconfiguration information of IAB node6 is reconfigured first, and after the reconfiguration of IAB node6 is completed, the reconfiguration of IAB node 5 is performed again;

Step S910, the IAB node 6 performs reconfiguration according to the RRC reconfiguration information, and sends a reconfiguration complete message to the IAB node 5.

The MT units of step S911 and IAB node 5 reconfigure according to the RRC reconfiguration information, and send the reconfiguration complete message of IAB node 6 and IAB node 5 to IAB node 2.

Step S912, IAB node 2 transmits an IAB node 5 and an IAB node 6 reconfiguration complete message to the second CU.

Step S913, the DU of IAB node 5 establishes an F1 connection with the second CU and retains the context information of IAB node 6, so that after the IAB node 5 is switched to IAB node 2, no context establishment procedure of IAB node 6 between the second CU and IAB node 5 is required.

The order of execution between step S911 to step S912 and step S913 is not limited; the second CU may add new routing information and mapping criteria on the new path (second CU, second DU, IAB node 2) after sending the context setup request to IAB node 2; alternatively, the second CU adds new routing information and mapping criteria on the new path (second CU, second DU, IAB node 2) after receiving the reconfiguration complete message of IAB node 5, IAB node 6.

Step S914, the second CU sends a context modification request to the IAB node 5; wherein the context modification request contains updated UL UP TNL information of IAB node 6;

The context modification request may be CONTEXT MODIFICATION REQUEST.

Step S915, the IAB node 5 updates the uplink transmission path after the IAB node 6 is switched to the second CU according to the UL UP TNL information;

Step S916, IAB node 5 sends context modification response message to the second CU;

The step S917, the DU of IAB node 6 establishes an F1 connection with the second CU.

The order of execution between step S914 to step S916 and step S917 is not limited.

The network architecture shown in fig. 10 includes a first host node and a second host node; wherein the first host node comprises a first CU and a first DU and the second host node comprises a second CU and a second DU; IAB node 1 is accessed to the first host node, IAB node 2 and IAB node 3 are accessed to the second host node; IAB node 4 and IAB node 5 are connected with IAB node 1; the UE accesses IAB node 5.

For the network structure shown in fig. 10, two alternative node switching flows are provided in the embodiment of the present invention; the first node switching flow is shown in fig. 11, and includes:

step 1101, the first CU receives measurement information reported by IAB node 1, IAB node 4, and IAB node 5;

In step S1102, the first CU determines, according to the received measurement information, that the IAB node 5 needs to be switched to the IAB node 2 to which the second home node is connected.

Step S1103, the first CU sends a first switching request to the second CU;

the first handover request may be Xn HANDOVER REQUEST.

Step S1104, after receiving the first switching request, the second CU initiates a context establishment request to the IAB node 2;

Step S1105, IAB node 2 returns a context setup response to the second CU after setting up the context of IAB node 5;

Where the context setup response may be CONTEXT SETUP RESPONSE.

Step S1106, the second CU returns a first handover request acknowledgement message to the first CU, where the first handover request acknowledgement message carries RRC reconfiguration information of IAB node 5;

the first handover request confirm message may be Xn HANDOVER REQUEST ACK.

Step S1107, the first CU sends downlink RRC transfer information to the IAB node 1;

the downlink RRC transfer information may be DL RRC transfer message.

In step S1108, IAB node 1 analyzes the RRC reconfiguration information of IAB node 5 from the downlink RRC transfer information, and sends the RRC reconfiguration information to IAB node 5.

In step S1109, the MT unit of IAB node 5 performs reconfiguration according to the received RRC reconfiguration information, and sends a reconfiguration complete message to IAB node 2.

Step S1110, IAB node 2 sends an IAB node 5 reconfiguration complete message to the second CU.

In step S1111, the DU of the IAB node 5 establishes an F1 connection with the second CU and retains the context information of the UE, so that after the IAB node 5 is switched to the IAB node 2, the context establishment procedure of the UE between the second CU and the IAB node 5 is not required.

The order of execution between step S1109 to step S1110 and step S1111 is not limited; the second CU may add new routing information and mapping criteria on the new path (second CU, second DU, IAB node 2) after sending the context setup request to IAB node 2; alternatively, the second CU, after receiving the reconfiguration complete message of IAB node 5, adds new routing information and mapping criteria on the new path (second CU, second DU, IAB node 2).

Step S1112, the first CU sends a second switching request to the second CU;

the second switching request carries the context information of the UE.

Step S1113, the second CU sends a context modification request to the IAB node 5; the context modification request comprises updated UL UP TNL information of the UE;

the context modification request may be CONTEXT MODIFICATION REQUEST.

Step S1114, the IAB node 5 updates the uplink transmission path after the UE switches to the second CU according to the UL UP TNL information;

note that, since the IAB node 5 retains the context information of the UE after accessing the IAB node 2, the UE does not need to perform the context establishment procedure between the second CU and the IAB node 5, and the IAB node 5 only needs to switch the UE to the uplink destination address after the second CU.

Step S1115, IAB node 5 sends a context modification response message to the second CU;

In step S1116, the second CU returns a second handover request confirm message to the first CU, where the second handover request confirm message carries RRC reconfiguration information of the UE.

Step S1117, the UE receives RRC reconfiguration information;

for example, the UE may receive RRC reconfiguration information through the target path of IAB node 5.

Step S1118, the UE reconfigures according to the RRC reconfiguration information.

In step S1119, the UE sends a reconfiguration complete message to the second CU.

The second node switching flow is shown in fig. 12, and includes:

step S1201, the first CU receives measurement information reported by IAB node 1, IAB node 4, and IAB node 5;

Step S1202, the first CU determines, according to the received measurement information, that it is necessary to switch the IAB node 5 to the IAB node 2 to which the second home node is connected.

Step S1203, the first CU sends a handover request to the second CU;

the first switching request carries the context information of the IAB node 5 and the context information of the IAB node 6, and the first switching request carries the identification information of the IAB node 2 which is accessed after the IAB node 5 is switched;

the handover request may be Xn HANDOVER REQUEST.

Step S1204, after receiving the first switching request, the second CU initiates a context establishment request to the IAB node 2;

Step S1205, after establishing the context of IAB node 5, IAB node 2 returns a context establishment response to the second CU;

Where the context setup response may be CONTEXT SETUP RESPONSE.

Step S1206, the second CU returns a handover request confirm message to the first CU, where the first handover request confirm message carries the RRC reconfiguration information of the IAB node 5 and the RRC reconfiguration information of the UE;

the handover request confirm message may be Xn HANDOVER REQUEST ACK.

Step S1207, the first CU sends downlink RRC transfer information to the IAB node 1;

the downlink RRC transfer information may be DL RRC transfer message.

In step S1208, the IAB node 1 analyzes the RRC reconfiguration information of the IAB node 5 and the RRC reconfiguration information of the IAB node 6 from the downlink RRC transfer information, and sends the RRC reconfiguration information and the RRC reconfiguration information of the UE to the IAB node 5.

Step S1209, IAB node 5 sends RRC reconfiguration information of the UE to the UE.

In this embodiment, an optional implementation manner is that the RRC reconfiguration information of the UE is reconfigured first, and after the UE reconfiguration is completed, the IAB node 5 is reconfigured;

step S1210, the UE performs reconfiguration according to the RRC reconfiguration information and sends a reconfiguration completion message to the IAB node 5.

The MT unit of step S1211, IAB node 5 performs reconfiguration according to the RRC reconfiguration information, and sends a reconfiguration complete message of the UE, IAB node 5 to IAB node 2.

Step S1212, IAB node 2 sends an IAB node 5, a reconfiguration complete message of the UE, to the second CU.

Step S1213, the DU of the IAB node 5 establishes an F1 connection with the second CU, and retains the context information of the IAB node6, so that after the IAB node 5 is switched to the IAB node 2, a context establishment procedure of the UE between the second CU and the IAB node 5 is not required.

The order of execution between step S1211 to step S1212 and step S1213 is not limited; the second CU may add new routing information and mapping criteria on the new path (second CU, second DU, IAB node 2) after sending the context setup request to IAB node 2; or, after receiving the reconfiguration complete message of IAB node 5 and UE, the second CU adds new routing information and mapping criteria to the new path (second CU, second DU, IAB node 2).

Step S1214, the second CU sends a context modification request to IAB node 5; the context modification request comprises updated UL UP TNL information of the UE;

the context modification request may be CONTEXT MODIFICATION REQUEST.

Step S1215, the IAB node 5 updates the uplink transmission path after the UE switches to the second CU according to the UL UP TNL information;

Step S1216, IAB node 5 sends a context modification response message to the second CU;

As shown in fig. 13, an embodiment of the present invention provides a migration node, including a memory 1301, a transceiver 1302, and a processor 1303:

a memory 1301 for storing a computer program;

a transceiver 1302 for transceiving data under control of the processor;

a processor 1303 for reading the computer program in the memory and performing the following operations:

accessing a target node according to the first configuration information;

Optionally, the processor 1303 is specifically configured to:

reconfiguring by the MT unit according to the first configuration information; and

and establishing connection with the second CU through DU.

Optionally, the processor 1303 is further configured to:

after establishing connection with the second CU, receiving a context modification request sent by the second CU; the context modification request comprises updated uplink transmission address information of the access equipment;

and updating an uplink transmission path after the access equipment is switched to the second CU according to the uplink transmission address information.

Optionally, if the handover request carries the context information of the mobility node and the access device thereof, the processor 1303 is further configured to:

receiving second configuration information sent by the first CU and used for reconfiguring the access equipment; the second configuration information is returned by the second CU after the first CU sends the switching request to the second CU;

and sending the second configuration information to the access equipment so that the access equipment reconfigures according to the second configuration information.

Optionally, the processor 1303 is further configured to:

Measuring signals of other nodes before receiving first configuration information sent by a first CU of a source host node which is accessed currently, and obtaining measurement information used for representing signal quality of the signals of the other nodes; wherein the other nodes include at least nodes connected to the target host node;

and reporting the measured measurement information to the first CU, so that the first CU determines to switch the migration node to the target node according to the measurement information.

Wherein in fig. 13, a bus architecture may comprise any number of interconnected buses and bridges, and in particular one or more processors represented by processor 1303 and various circuits of memory represented by memory 1301, linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 1302 may be a number of elements, i.e., including a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium, including wireless channels, wired channels, optical cables, etc. The processor 1303 is responsible for managing the bus architecture and general processing, and the memory 1301 may store data used by the processor 1303 in performing operations.

The processor 1303 may be a Central Processing Unit (CPU), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a Field programmable gate array (Field-Programmable Gate Array, FPGA), or a complex programmable logic device (Complex Programmable Logic Device, CPLD), or the processor may employ a multi-core architecture.

As shown in fig. 14, an embodiment of the present invention provides a second CU located at a target host node, including a memory 1401, a transceiver 1402, and a processor 1403:

a memory 1401 for storing a computer program;

a transceiver 1402 for transceiving data under control of the processor;

a processor 1403 for reading the computer program in the memory and performing the following operations:

Optionally, the processor 1403 is further configured to:

after the first configuration information of the migration node is returned to the first CU, a connection is established with a DU of the migration node.

Optionally, if the handover request carries the context information of the mobility node and the access device accessing the mobility node, the processor 1403 is further configured to:

after establishing connection with the DU of the migration node, sending a context modification request to the migration node, where the context modification request includes updated uplink transmission address information of the access device, so that the migration node updates an uplink transmission path after the access device is switched to the second CU according to the uplink transmission address information.

And returning the second configuration information of the access equipment to the first CU, so that the first CU sends the second configuration information to the access equipment, and the access equipment reconfigures according to the second configuration information.

Optionally, if the access device is a node, the processor 1403 is further configured to:

after the second configuration information of the access device is returned to the first CU, a connection is established with the DU of the access device.

Where in FIG. 14, a bus architecture may be comprised of any number of interconnected buses and bridges, one or more processors, typically represented by processor 1403, and various circuits of memory, typically memory 1401, linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 1402 may be a number of elements, including a transmitter and a receiver, providing a means for communicating with various other apparatus over transmission media, including wireless channels, wired channels, optical cables, and the like. The processor 1403 is responsible for managing the bus architecture and general processing, and the memory 1401 may store data used by the processor 1403 in performing operations.

Processor 1403 may be a Central Processing Unit (CPU), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a Field programmable gate array (Field-Programmable Gate Array, FPGA) or a complex programmable logic device (Complex Programmable Logic Device, CPLD), or a multi-core architecture.

As shown in fig. 15, an embodiment of the present invention provides a first CU located at a source host node, including a memory 1501, a transceiver 1502, and a processor 1503:

a memory 1501 for storing a computer program;

a transceiver 1502 for receiving and transmitting data under the control of the processor;

a processor 1503 for reading the computer program in the memory and performing the following operations:

Optionally, the processor 1503 is further configured to:

before a switching request is sent to a second CU of a target host node, receiving measurement information obtained by measuring signals of other nodes reported by the migration node; wherein the measurement information is used to represent signal quality of signals of the other nodes, and the other nodes at least comprise nodes connected with the target host node;

and determining to switch the migration node to the target node according to the measurement information.

Optionally, if the handover request carries the context information of the mobility node and the access device that accesses the mobility node, the processor 1503 is further configured to:

and receiving second configuration information of the access equipment returned by the second CU, and sending the second configuration information to the access equipment so that the access equipment reconfigures according to the second configuration information.

Optionally, the processor 1503 is specifically configured to:

and sending the second configuration information to the access equipment through the migration node.

Wherein in fig. 15, a bus architecture may comprise any number of interconnected buses and bridges, and in particular one or more processors represented by processor 1503 and various circuits of memory represented by memory 1501, linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 1502 may be a number of elements, i.e., include a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium, including wireless channels, wired channels, optical cables, and the like. The processor 1503 is responsible for managing the bus architecture and general processing, and the memory 1501 may store data used by the processor 1503 in performing operations.

The processor 1503 may be a Central Processing Unit (CPU), application specific integrated circuit (Application Specific Integrated Circuit, ASIC), field-programmable gate array (Field-Programmable Gate Array, FPGA), or complex programmable logic device (Complex Programmable Logic Device, CPLD), or it may employ a multi-core architecture.

As shown in fig. 16, an embodiment of the present invention provides a first CU located at a source host node, including a memory 1601, a transceiver 1602, and a processor 1603:

a memory 1601 for storing a computer program;

a transceiver 1602 for transceiving data under control of the processor;

a processor 1603 for reading the computer program in the memory and performing the following operations:

receiving second configuration information sent by an accessed migration node;

Wherein in fig. 16, a bus architecture may comprise any number of interconnected buses and bridges, and in particular one or more processors represented by processor 1603 and various circuits of memory represented by memory 1601. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 1602 may be a number of elements, i.e., include a transmitter and a receiver, providing a unit for communicating with various other apparatus over transmission media, including wireless channels, wired channels, optical cables, and the like. The processor 1603 is responsible for managing the bus architecture and general processing, and the memory 1601 may store data used by the processor 1603 in performing operations.

The processor 1603 may be a Central Processing Unit (CPU), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a Field programmable gate array (Field-Programmable Gate Array, FPGA) or a complex programmable logic device (Complex Programmable Logic Device, CPLD), and may also employ a multi-core architecture.

As shown in fig. 17, an embodiment of the present invention provides a node switching apparatus, including:

a first receiving unit 1701, configured to receive first configuration information sent by a first CU of a source hosting node that is currently accessed;

a processing unit 1702 configured to access a target node according to the first configuration information;

a storage unit 1703, configured to communicate with an access device accessing the migration node using context information of the access device after accessing the target node; the context information of the access device is obtained by the migration node from a context establishment procedure for the access device, and the context establishment procedure is performed between the migration node and the first CU;

Optionally, the processing unit 1702 is specifically configured to:

and establishing connection with the second CU through DU.

Optionally, the processing unit 1702 is further configured to:

after the DU establishes connection with the second CU, receiving a context modification request sent by the second CU; the context modification request comprises updated uplink transmission address information of the access equipment; and updating an uplink transmission path after the access equipment is switched to the second CU according to the uplink transmission address information.

Optionally, if the handover request carries the context information of the mobility node and the access device thereof, the first receiving unit 1701 is further configured to:

Optionally, the first receiving unit 1701 is further configured to:

Measuring signals of other nodes before receiving first configuration information sent by a first CU of a source host node which is accessed currently, and obtaining measurement information used for representing signal quality of the signals of the other nodes; wherein the other nodes include at least nodes connected to the target host node; and reporting the measured measurement information to the first CU, so that the first CU determines to switch the migration node to the target node according to the measurement information.

As shown in fig. 18, an embodiment of the present invention provides a node switching apparatus, including:

a second receiving unit 1801, configured to receive a handover request sent by the first CU of the source hosting node; the switching request carries the context information of the migration node, or the switching request carries the context information of the migration node and the access equipment accessed to the migration node;

a first sending unit 1802, configured to return first configuration information of the migration node to the first CU, so that the first CU sends the first configuration information to the migration node, and the migration node accesses a target node according to the first configuration information, and after accessing the target node, uses context information of the access device to communicate with the access device; the context information of the access device is obtained by the migration node from a context establishment procedure for the access device, and the context establishment procedure is performed between the migration node and the first CU;

Optionally, the first sending unit 1802 is further configured to:

Optionally, if the handover request carries the context information of the mobility node and the access device that accesses the mobility node, the first sending unit 1802 is further configured to:

As shown in fig. 19, an embodiment of the present invention provides a node switching apparatus, including:

a second sending unit 1901, configured to send a handover request to a second CU of the target hosting node; the switching request carries the context information of the migration node, or the switching request carries the context information of the migration node and the access equipment thereof;

a third receiving unit 1902, configured to receive first configuration information of the migration node returned by the second CU, and send the first configuration information to the migration node, so that the migration node accesses a target node according to the first configuration information;

Optionally, the second sending unit 1901 is further configured to:

before a switching request is sent to a second CU of a target host node, receiving measurement information obtained by measuring signals of other nodes reported by the migration node; wherein the measurement information is used to represent signal quality of signals of the other nodes, and the other nodes at least comprise nodes connected with the target host node; and determining to switch the migration node to the target node according to the measurement information.

Optionally, if the handover request carries the context information of the mobility node and the access device that accesses the mobility node, the third receiving unit 1902 is further configured to:

Optionally, the third receiving unit 1902 is specifically configured to:

As shown in fig. 20, an embodiment of the present invention provides a node switching apparatus, including:

a fourth receiving unit 2001, configured to receive second configuration information sent by the accessed migration node;

a connection establishment unit 2002, configured to reconfigure according to the second configuration information, and establish a connection with a second CU of the target host node through a DU;

It should be noted that, in the embodiment of the present invention, the division of the units is schematic, which is merely a logic function division, and other division manners may be implemented in actual practice. In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a processor-readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

It should be noted that, the above device provided in the embodiment of the present invention can implement all the method steps implemented in the method embodiment and achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those in the method embodiment in this embodiment are omitted.

Based on the same inventive concept, the embodiment of the invention also provides a node switching method, and because the principle of solving the problem of the method is similar to that of the migration node side, the implementation of the method can be referred to the implementation of the migration node side, and the repetition is omitted.

As shown in fig. 21, an embodiment of the present invention provides a node switching method, applied to a migration node side, including:

step S2101, a migration node receives first configuration information sent by a first CU of a source host node which is accessed currently;

step S2102, the migration node accesses a target node according to the first configuration information;

step S2103, after the migration node accesses the target node, the migration node communicates with the access device by using context information of the access device accessing the migration node; the context information of the access device is obtained by the migration node from a context establishment procedure for the access device, and the context establishment procedure is performed between the migration node and the first CU;

Optionally, the migration node accesses the target node according to the first configuration information, including:

the MT unit of the migration node reconfigures according to the first configuration information; and

the DU of the migration node establishes a connection with the second CU.

Optionally, after the DU of the migration node establishes a connection with the second CU, the method further includes:

the migration node receives a context modification request sent by the second CU; the context modification request comprises updated uplink transmission address information of the access equipment;

and the migration node updates an uplink transmission path after the access equipment is switched to the second CU according to the uplink transmission address information.

Optionally, if the handover request carries the context information of the mobility node and the access device thereof, the method further includes:

the migration node receives second configuration information sent by the first CU and used for reconfiguring the access equipment; the second configuration information is returned by the second CU after the first CU sends the switching request to the second CU;

and the migration node sends the second configuration information to the access equipment so that the access equipment reconfigures according to the second configuration information.

Optionally, before the migration node receives the first configuration information sent by the first CU of the source hosting node currently accessed, the method further includes:

the migration node measures signals of other nodes to obtain measurement information used for representing signal quality of the signals of the other nodes; wherein the other nodes include at least nodes connected to the target host node;

and the migration node reports the measured measurement information to the first CU, so that the first CU determines to switch the migration node to the target node according to the measurement information.

Based on the same inventive concept, the embodiment of the present invention further provides a node switching method, and since the principle of solving the problem in the method is similar to that of the second CU side, the implementation of the method can refer to the implementation of the second CU side, and the repetition is not repeated.

As shown in fig. 22, an embodiment of the present invention provides a node switching method, which is applied to a second CU side, and includes:

step S2201, the second CU of the target hosting node receives a handover request sent by the first CU of the source hosting node; the switching request carries the context information of the migration node, or the switching request carries the context information of the migration node and the access equipment accessed to the migration node;

step S2202, the second CU returns the first configuration information of the migration node to the first CU, so that the first CU sends the first configuration information to the migration node, the migration node accesses a target node according to the first configuration information, and after accessing the target node, uses context information of the access device to communicate with the access device; the context information of the access device is obtained by the migration node from a context establishment procedure for the access device, and the context establishment procedure is performed between the migration node and the first CU;

Optionally, after the second CU returns the first configuration information of the migration node to the first CU, the method further includes:

the second CU establishes a connection with a DU of the migration node.

Optionally, if the handover request carries the migration node and context information of an access device of the migration node, after the second CU establishes a connection with the DU of the migration node, the method further includes:

and the second CU sends a context modification request to the migration node, wherein the context modification request contains updated uplink transmission address information of the access equipment, so that the migration node updates an uplink transmission path after the access equipment is switched to the second CU according to the uplink transmission address information.

Optionally, if the handover request carries the context information of the mobility node and the access device that accesses the mobility node, the method further includes:

And the second CU returns second configuration information of the access equipment to the first CU, so that the first CU sends the second configuration information to the access equipment, and the access equipment reconfigures according to the second configuration information.

Optionally, if the access device is a node, after the second CU returns the second configuration information of the access device to the first CU, the method further includes:

a connection is established between the second CU and a DU of the access device.

Based on the same inventive concept, the embodiment of the present invention further provides a node switching method, and since the principle of solving the problem in the method is similar to that of the first CU side, the implementation of the method can refer to the implementation of the first CU side, and the repetition is not repeated.

As shown in fig. 23, an embodiment of the present invention provides a node switching method, which is applied to a first CU side, and includes:

step S2301, the first centralized unit CU of the source hosting node sends a handover request to the second CU of the target hosting node; the switching request carries the context information of the migration node, or the switching request carries the context information of the migration node and the access equipment thereof;

Step S2302, the first CU receives first configuration information of the migration node returned by the second CU, and sends the first configuration information to the migration node, so that the migration node accesses a target node according to the first configuration information;

Optionally, before the first centralized unit CU of the source hosting node sends the handover request to the second CU of the target hosting node, the method further includes:

the first CU receives measurement information obtained by measuring signals of other nodes reported by the migration node; wherein the measurement information is used to represent signal quality of signals of the other nodes, and the other nodes at least comprise nodes connected with the target host node;

and the first CU determines to switch the migration node to the target node according to the measurement information.

The first CU receives second configuration information of the access device returned by the second CU, and sends the second configuration information to the access device, so that the access device reconfigures according to the second configuration information.

Optionally, the first CU sends the second configuration information to the access device, including:

and the first CU sends the second configuration information to the access equipment through the migration node.

Based on the same inventive concept, the embodiment of the invention also provides a node switching method, and because the principle of solving the problem of the method is similar to that of the access node side, the implementation of the method can be referred to the implementation of the access node side, and the repetition is omitted.

As shown in fig. 24, an embodiment of the present invention provides a node switching method, which is applied to an access node side, and includes:

step S2401, the access node receives second configuration information sent by the accessed migration node;

step S2402, the access node reconfigures according to the second configuration information, and establishes a connection with a second CU of the target host node through a DU;

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.

Claims

1. A method of node switching, the method comprising:

the migration node receives first configuration information sent by a first centralized unit CU of a source host node which is accessed currently;

2. The method of claim 1, wherein the migration node accesses a target node according to the first configuration information, comprising:

the mobile terminal MT unit of the migration node reconfigures according to the first configuration information; and

the distribution unit DU of the migration node establishes a connection with the second CU.

3. The method of claim 2, further comprising, after the DU of the migration node establishes a connection with the second CU:

4. The method of claim 1, wherein if the handover request carries context information for the migration node and the access device thereof, the method further comprises:

5. The method according to any of claims 1-4, further comprising, before the migration node receives the first configuration information sent by the first CU of the source host node currently being accessed:

6. A method of node switching, the method comprising:

7. The method of claim 6, wherein after the second CU returns the first configuration information of the migration node to the first CU, further comprising:

the second CU establishes a connection with a DU of the migration node.

8. The method of claim 7, wherein if the handover request carries the context information of the migration node and the access device to which the migration node is connected, after the second CU establishes a connection with the DU of the migration node, further comprising:

9. The method of claim 6, wherein if the handover request carries context information of the migration node and an access device to which the migration node accesses, the method further comprises:

10. The method of claim 9, wherein if the access device is a node, after the second CU returns the second configuration information of the access device to the first CU, further comprising:

11. A method of node switching, the method comprising:

the first CU receives first configuration information of the migration node returned by the second CU, and sends the first configuration information to the migration node, so that the migration node accesses a target node according to the first configuration information, and after the target node is accessed, the migration node uses the context information of the access equipment to communicate with the access equipment; the context information of the access device is obtained by the migration node from a context establishment procedure for the access device, and the context establishment procedure is performed between the migration node and the first CU;

12. The method of claim 11, wherein before the first hub unit CU of the source hosting node sends a handover request to the second CU of the target hosting node, further comprising:

13. The method of claim 11, wherein if the handover request carries context information of the migration node and an access device to which the migration node accesses, the method further comprises:

14. The method of claim 13, wherein the first CU sends the second configuration information to the access device, comprising:

15. A migration node comprising a memory, a transceiver, and a processor:

a memory for storing a computer program;

a transceiver for transceiving data under control of the processor;

accessing a target node according to the first configuration information;

16. The migration node of claim 15 wherein the processor is specifically configured to:

and establishing connection with the second CU through DU.

17. The migration node of claim 16, wherein the processor is further configured to:

18. The migration node of claim 15 wherein if the handover request carries context information for the migration node and the access device thereof, the processor is further configured to:

19. The migration node of any one of claims 15-18, wherein the processor is further configured to:

20. A second CU at a target host node, comprising a memory, a transceiver, and a processor:

a memory for storing a computer program;

a transceiver for transceiving data under control of the processor;

21. The second CU of claim 20, wherein the processor is further operable to:

22. The second CU of claim 21, wherein if the handover request carries context information for the migration node and its access device to the migration node, the processor is further configured to:

After the second CU establishes a connection with the DU of the migration node, sending a context modification request to the migration node, where the context modification request includes updated uplink transmission address information of the access device, so that the migration node updates an uplink transmission path after the access device is switched to the second CU according to the uplink transmission address information.

23. The second CU of claim 20, wherein if the handover request carries context information for the migration node and its access device to the migration node, the processor is further configured to:

24. The second CU of claim 23, wherein if the access device is a node, the processor is further configured to:

25. A first CU at a source hosting node, comprising a memory, a transceiver, and a processor:

A memory for storing a computer program;

a transceiver for transceiving data under control of the processor;

receiving first configuration information of the migration node returned by the second CU, and sending the first configuration information to the migration node so that the migration node accesses a target node according to the first configuration information; after the target node is accessed, the context information of the access equipment is used for communication with the access equipment; the context information of the access device is obtained by the migration node from a context establishment procedure for the access device, and the context establishment procedure is performed between the migration node and the first CU;

26. The first CU of claim 25, wherein the processor is further operable to:

27. The first CU of claim 25, wherein if the handover request carries context information for the migration node and its access device to the migration node, the processor is further configured to:

28. The first CU of claim 27, wherein the processor is operable in particular to:

29. A node switching apparatus, for use in a migration node, comprising:

a control unit, configured to communicate with an access device accessing the migration node using context information of the access device after accessing the target node; the context information of the access device is obtained by the migration node from a context establishment procedure for the access device, and the context establishment procedure is performed between the migration node and the first CU;

30. A node switching apparatus for application to a target host node, comprising:

a first sending unit, configured to return first configuration information of the migration node to the first CU, so that the first CU sends the first configuration information to the migration node, and the migration node accesses a target node according to the first configuration information, and after accessing the target node, uses context information of the access device to communicate with the access device; the context information of the access device is obtained by the migration node from a context establishment procedure for the access device, and the context establishment procedure is performed between the migration node and the first CU;

31. A node switching apparatus, for use with a source host node, comprising:

the third receiving unit is used for receiving first configuration information of the migration node returned by the second CU and sending the first configuration information to the migration node so that the migration node accesses a target node according to the first configuration information; after the target node is accessed, the context information of the access equipment is used for communication with the access equipment; the context information of the access device is obtained by the migration node from a context establishment procedure for the access device, and the context establishment procedure is performed between the migration node and a first CU;

32. A processor-readable storage medium, characterized in that the processor-readable storage medium stores a computer program for causing the processor to perform the method of any one of claims 1 to 14.