CN110536377A

CN110536377A - Father node selection method, device, equipment and medium

Info

Publication number: CN110536377A
Application number: CN201910755605.4A
Authority: CN
Inventors: 刁雪莹
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2019-08-15
Filing date: 2019-08-15
Publication date: 2019-12-03
Also published as: WO2021027817A1

Abstract

The application proposes a kind of father node selection method, device, equipment and medium.The father node selection method is applied to from access return link IAB node, comprising: according to the access situation of IAB node and the deployment scenario of IAB node access networks network, determine the father node of the IAB node.

Description

Father node selection method, device, equipment and medium

Technical field

This application involves field of wireless communication, and in particular to a kind of father node selection method, device, equipment and medium.

Background technique

The high transmission speed of 5G network essentially consists in the use of millimeter wave, still, millimeter wave decay in air it is larger and Diffracting power is weaker, for this purpose, from access return link (Integrated Access and Backhaul links, IAB) skill Art is suggested.It include wireless access links and wireless backhaul links from access return link, wireless access links are UE (User Equipment, user equipment) and IAB node between communication link, communication link of the wireless backhaul links between IAB node, For carrying out data back, therefore IAB node carries out data back without wire transmission network.When IAB node access networks network, IAB node is possible to be connected to the DU (Distributed Unit, distribution unit entity) for not supporting IAB function or base station, IAB node cannot achieve its IAB function at this time.

Summary of the invention

The application provides a kind of father node selection method, device, equipment and medium, to guarantee that IAB node can be realized it IAB function.

In a first aspect, the embodiment of the present application provides a kind of father node selection method, it is applied in IAB node, comprising:

According to the access situation of IAB node and the deployment scenario of IAB node access networks network, the IAB node is determined Father node.

Second aspect, the embodiment of the present application provide a kind of father node selection method, are applied in access management function entity, Include:

In IAB node according to the access situation of the IAB node and the deployment scenario of IAB node access networks network, determine Out after the target father node of the IAB node, by the IAB of IAB node authorization instruction information or the IAB node The instruction of IAB node is sent to host's centralized unit entity corresponding with target father node or base station.

The third aspect, the embodiment of the present application provide a kind of father node selection device, are applied in IAB node, feature exists In, comprising:

First father node selecting module, for according to the access situation of IAB node and the deployment of IAB node access networks network Scene determines the father node of the IAB node.

Fourth aspect, the embodiment of the present application provide a kind of father node selection device, are applied in access management function entity, Include:

Second father node selecting module, for according to the access situation of IAB node and the portion of IAB node access networks network Scene is affixed one's name to, after the target father node for determining the IAB node, by the IAB authorization instruction information of the IAB node or described The IAB node instruction of IAB node is sent to host's centralized unit entity corresponding with target father node or base station.

5th aspect, the embodiment of the present application provide a kind of IAB node, comprising: one or more processors；Storage device, For storing one or more programs；When one or more of programs are executed by one or more of processors, so that institute State the father node selecting party that is applied in IAB node of the one or more processors realization as described in the application any embodiment Method.

6th aspect, the embodiment of the present application provide a kind of storage medium, and the storage medium is stored with computer program, The father's section being applied in IAB node as described in the application any embodiment is realized when the computer program is executed by processor Point selection method.

7th aspect, the embodiment of the present application provide a kind of access management function entity, comprising: one or more processors； Storage device, for storing one or more programs；When one or more of programs are held by one or more of processors Row, so that one or more of processors, which are realized, is applied to access management function entity as described in the application any embodiment In father node selection method.

Eighth aspect, the embodiment of the present application provide a kind of storage medium, and the storage medium is stored with computer program, It is realized when the computer program is executed by processor and is applied to access management function reality as described in the application any embodiment Father node selection method in body.

About the above embodiments of the application and other in terms of and its implementation, in Detailed description of the invention, specific embodiment party More explanations are provided in formula and claim.

Detailed description of the invention

Fig. 1 is that network IAB disposes schematic diagram；

Fig. 2 is that the network IAB that CU and DU is separated disposes schematic diagram；

Fig. 3 is a kind of flow diagram of father node selection method provided by the present application；

Fig. 4 is the first IAB node deployment schematic diagram of a scenario provided by the present application；

Fig. 5 is second of IAB node deployment schematic diagram of a scenario provided by the present application；

Fig. 6 is the third IAB node deployment schematic diagram of a scenario provided by the present application；

Fig. 7 is the 4th kind of IAB node deployment schematic diagram of a scenario provided by the present application；

Fig. 8 is the 5th kind of IAB node deployment schematic diagram of a scenario provided by the present application；

Fig. 9 is the 6th kind of IAB node deployment schematic diagram of a scenario provided by the present application；

Figure 10 is a kind of flow diagram of father node selection method provided by the present application；

Figure 11 is a kind of structural schematic diagram of father node selection device provided by the present application；

Figure 12 is a kind of structural schematic diagram of father node selection device provided by the present application；

Figure 13 is a kind of structural schematic diagram of IAB node provided by the present application；

Figure 14 is a kind of structural schematic diagram of access management function entity provided by the present application.

Specific embodiment

For the purposes, technical schemes and advantages of the application are more clearly understood, below in conjunction with attached drawing to the application Embodiment be described in detail.It should be noted that in the absence of conflict, in the embodiment and embodiment in the application Feature can mutual any combination.

Before describing embodiment provided by the present application, IAB is illustratively illustrated first.

Deploy an example of the network of IAB as shown in Figure 1, in figure include node 10, node 20 and node 30, In, wired connection is carried out between node 10 and core net, e.g. node 10 is connect with core net by optical fiber 11,20 He of node Node 30 passes through node 10 to core net sending and receiving data.User equipment (User Equipment, UE) can pass through access link (access link) access node 10, node 20 and node 30 can pass through wireless return link (backhaul between node Link data) are transmitted.In IAB network, supports wireless access and the access node that data carry out wireless backhaul is known as IAB Node (IAB node), the node 20 and node 30 of example as shown in figure 1.In IAB network, wireless backhaul function is provided for IAB node Can, so that the access node that UE is connected to core net is known as IAB host (IAB donor), the node 10 of example as shown in figure 1.With number For uplink, node 20 can will be sent to node 10 from the received data of UE by wireless backhaul link, connect UE data are sent to core network element again by ingress 10.By taking data downstream is transmitted as an example, core network element sends out UE data packet Node 10 is given, UE data are sent to node 20 by wireless backhaul link again by access node 10, then access section UE data are sent to UE by access link by point 20.

In addition, supporting CU (Centralized Unit concentrates network element) and DU (Distributed Unit, distribution network element) Be deployed separately is that an important technical characteristic in NR (New Radio, newly eat dishes without rice or wine) is therefore deployed separately scene in CU and DU In be also required to support IAB function.Fig. 2 is the network IAB deployment schematic diagram of CU and DU separation.As shown in Fig. 2, wherein IAB node It can have DU similar functions and MT (Mobile Terminal, mobile terminal) similar functions, MT similar functions namely UE are similar Function, IAB node access two father's IAB nodes by dual link, i.e. IAB node is respectively connected to father IAB node 1 by dual link With father IAB node 2.

When IAB node access networks network, there may be the DU for not supporting IAB function or base stations for IAB near nodal.If IAB node be connected to do not support the DU of IAB function perhaps base station it will be unable to the other sub- IAB nodes of service or UE.

In an exemplary embodiment, Fig. 3 is a kind of process signal of father node selection method provided by the present application Figure.This method can be adapted for the case where IAB selects the father node of a support IAB function when accessing network.This method can To be executed by the father node selection device provided by the present application applied to IAB node, which can be by software And/or hardware realization, and it is integrated in IAB node.

As shown in figure 3, a kind of father node selection method provided by the present application applied to IAB node, comprising:

S120, according to the access situation of IAB node and the deployment scenario of IAB node access networks network, determine the IAB section The father node of point.

The IAB node of one IAB node is known as the sub- IAB node of this IAB node, and an IAB node is to connect identity The DU for the support IAB function of being accessed or base station are known as father's IAB node of this IAB node.

The network insertion situation of IAB node can be divided into initial access and non-initial access, the portion of IAB node access networks network Administration scene have can be divided into it is a variety of, specifically can according in deployed position setting regions DU entity and base station whether support IAB function divides, can also be according to AMF (the Access and Mobility for not supporting the base station of IAB function to be connected Management Function, access management function) whether entity support IAB function to divide, it can also be according to not supporting Whether the CU entity that the DU entity of IAB function is connected supports IAB function, and whether the AMF entity further connected is supported IAB function divides.

Therefore, IAB node select support IAB function father node when can in conjunction with IAB node access situation and The deployment scenario of network is accessed to determine.In the case of difference access, under different deployment scenarios, IAB node selects the side of father node Formula may have identical, it is also possible to have different.

Wherein, the IAB node can be DU entity, be also possible to MT.

A kind of father node selection method provided by the present application, in IAB node access networks network, according to the access of IAB node How the deployment scenario of situation and IAB node access networks network efficiently solves IAB node to determine IAB node father node The problem of selecting father node, it is ensured that the father node of IAB node selection supports IAB function, and then makes the IAB function of IAB node Guaranteed, has been achieved the effect that for other sub- IAB nodes and UE service.

On the basis of the above embodiments, the variant embodiment of above-described embodiment is proposed, it should be noted that being Make description briefly, only describes the difference with above-described embodiment in an alternate embodiment.

In one example, the deployment scenario of IAB node access networks network may include following six kinds of deployment scenarios.

First scene are as follows: include IAB donor DU, IAB node and branch in the setting regions of IAB node deployment position Hold the base station of IAB function.

As shown in figure 4, host's centralized unit entity (donor CU) 101 is connect by F1 interface with donor DU 102, Donor DU 102 is connect by return link (BH link) with IAB node 103, wherein donor CU 101, onor DU102 and IAB node 103 supports IAB function.IAB node 104 refers to that IAB corresponding with the first scene will be deployed in The position of node in network, the IAB mobile terminal (IAB-MT) being e.g. initially accessed, deployment is all nearby IAB function is all supported in DU and base station.

Second scene are as follows: include IAB donor DU in the setting regions of IAB node deployment position and do not support IAB function The distribution unit entity of energy, the distribution unit entity connection host's centralized unit entity donor CU for not supporting IAB function.

As shown in figure 5, donor CU 101 is connect by F1 interface with donor DU 102, and with conventional distribution unit Entity (normal DU) 105 connects, and donor DU 102 is connect by BH link with IAB node 103, wherein place donor CU 101, donor DU 102 and IAB node 103 support IAB function, and conventional distribution unit entity 105 does not support IAB function Energy.IAB node 104 refers to the node that will be deployed in IAB network corresponding with the second scene, is e.g. carrying out Nearby there are other IAB nodes 103 in the position of the IAB-MT of initial access, deployment, support the donor DU of IAB function 102, and the normal DU 105 of IAB function is not supported.

Third scene are as follows: including IAB donor DU, IAB node and not in the setting regions of IAB node deployment position The base station for supporting IAB function, the access management function entity connecting with the base station support IAB function.

As shown in fig. 6, AMF 107 is connect by NG interface with donor CU 101, and it is connect with base station (gNB) 106, The AMF 107 connecting with donor CU 101 and the AMF 107 connecting with gNB 106 can be the same AMF, be also possible to not With AMF, with difference to exemplify in Fig. 6.Donor CU 101 is connect by F1 interface with donor DU 102, donor DU 102 are connect by BH link with IAB node 103, wherein AMF 107, donor CU 101, donor DU 102 and IAB section Point 103 supports IAB function, and gNB 106 does not support IAB function.IAB node 104 refers to be deployed in and third field The position of node in the corresponding IAB network of scape, the IAB-MT being e.g. initially accessed, deployment nearby has other IAB node 103, support the donor DU 102 of IAB function, and do not support the gNB 106 of IAB function, but gNB 106 The AMF 107 of connection is to support IAB function, there is the net for supporting IAB function in other core network elements that AMF 107 is connected Member.

4th scene are as follows: including IAB donor DU, IAB node and not in the setting regions of IAB node deployment position Support the base station of IAB function, the access management function entity connecting with the base station does not support IAB function.

As shown in fig. 7, AMF 107 is connect by NG interface with donor CU 101, AMF 108 passes through NG interface and gNB 106 connections.Donor CU 101 is connect by F1 interface with donor DU 102, and donor DU 102 passes through BH link and IAB Node 103 connects, wherein and AMF 107, donor CU 101, donor DU 102 and IAB node 103 support IAB function, And AMF 108 and gNB 106 do not support IAB function.IAB node 104 refers to be deployed in corresponding with the 4th scene The position of node in IAB network, the IAB-MT being e.g. initially accessed, deployment nearby has other IAB to save Point 103, supports the donor DU 102 of IAB function, and does not support the gNB 106 of IAB function, and do not support IAB function The connection of gNB 106 AMF 108 be also do not support IAB function.

5th scene are as follows: including IAB donor DU, IAB node and not in the setting regions of IAB node deployment position Support the distribution unit entity of IAB function, the centralized unit entity connecting with the distribution unit entity for not supporting IAB function IAB function is not supported, and the access management function entity connecting with the centralized unit entity supports IAB function.

As shown in figure 8, AMF 107 is connect by NG interface with donor CU 101, and connect with normal CU 109 It connecing, the AMF 107 connecting with donor CU 101 and the AMF 107 connecting with normal CU 109 can be the same AMF, It is also possible to different AMF, with difference to exemplify in Fig. 8.Donor CU 101 is connected by F1 interface and donor DU 102 It connects, donor DU 102 is connect by BH link with IAB node 103, and normal CU 109 passes through F1 interface and normal DU105 connection, wherein AMF 107, donor CU 101, donor DU 102 and IAB node 103 support IAB function, and Normal CU 109 and normal DU105 do not support IAB function.IAB node 104 refers to be deployed in and the 5th The position of node in the corresponding IAB network of scape, the IAB-MT being e.g. initially accessed, deployment nearby has other IAB node 103, support the donor DU 102 of IAB function, and do not support the normal DU105 of IAB function, and The normal CU 109 of normal DU105 connection does not support IAB function yet, but the AMF that normal CU 109 is connected 107 be to support IAB function, there is the network element for supporting IAB function in other core network elements that AMF 107 is connected.

6th scene are as follows: including IAB donor DU, IAB node and not in the setting regions of IAB node deployment position Support the distribution unit entity of IAB function, the centralized unit entity connecting with the distribution unit entity for not supporting IAB function IAB function is not supported, and the access management function entity connecting with the centralized unit entity does not support IAB function.

As shown in figure 9, AMF 107 connect by NG interface with donor CU 101, AMF 108 pass through NG interface and The connection of normal CU 109.Donor CU 101 is connect by F1 interface with donor DU 102, and donor DU 102 passes through BH Link is connect with IAB node 103, and normal CU 109 is connect by F1 interface with normal DU105, wherein AMF 107, Donor CU 101, donor DU 102 and IAB node 103 support IAB function, and AMF 108,109 and of normal CU Normal DU105 does not support IAB function.IAB node 104 refers to that IAB net corresponding with the 6th scene will be deployed in Nearby there are other IAB nodes 103 in the position of node in network, the IAB-MT being e.g. initially accessed, deployment, It supports the donor DU 102 of IAB function, and does not support the normal DU105 of IAB function, and do not support IAB function The normal CU 109 of normal DU105 connection does not support IAB function yet, meanwhile, the AMF that normal CU 109 is connected 108 do not support IAB function yet.

In one example, the access situation of the IAB node is initial access or non-initial access, the deployment scenario are One of first scene to the 6th scene, the father node of the determination IAB node, comprising:

The father node of the IAB node is selected in the father node list that the IAB node is pre-configured.

It is the first scene, the second scene, third scene, the 4th in deployment scenario when IAB node is to be initially accessed In scape, the 5th scene and the 6th scene in the case where any scene, IAB node can have the father node list of pre-configuration, And then can its be pre-configured father node list in select one as its father node.

It is the first scene, the second scene, third scene, the 4th in deployment scenario when IAB node is non-initial access In scape, the 5th scene and the 6th scene in the case where any scene, IAB node also can have the father node column of pre-configuration Table, so can also its be pre-configured father node list in select one as its father node.

Wherein, the father node list of pre-configuration is operation management maintainance (Operation Administration and Maintenance, OAM) entity configuration, it is added in the configuration information of IAB node before the foundation of IAB node.It is pre-configured Father node list in include node support IAB function.

In one example, one of the following is included at least in the father node list that IAB node is pre-configured:

Support IAB under current registering public land mobile network (Public Land Mobile Network, PLMN) The cell ID of function；

The cell ID of support IAB function under all PLMN；

Cell Global Identification；

Physical Cell Identifier.

In one example, the above method further include: in the case where the IAB node access cell, according to radio resource control Whether sentence comprising backhaul self-adapted protocol layer configuration message in preparative layer (Radio Resource Control, RRC) reallocation message Break the distribution unit entity of IAB node access or whether base station supports IAB function.

No matter IAB node is initial access or non-initial access, and it is suitable small to access any one in the IAB node , can be according to whether including that backhaul self-adapted protocol layer configures message in RRC reallocation message, to judge point of its access after area Whether cloth element entity or base station support IAB function.When in RRC reallocation message include backhaul self-adapted protocol layer configure message When, IAB function is supported in the distribution unit entity of the IAB node access or base station；When not including backhaul in RRC reallocation message When self-adapted protocol layer configures message, the distribution unit entity of the IAB node access or base station do not support IAB function.

System information based on Cell Broadcast CB selects the father node of the IAB node.

It is the first scene, the second scene, third scene, the 4th in deployment scenario when IAB node is to be initially accessed In scape, the 5th scene and the 6th scene in the case where any scene, when IAB node access networks network, can be small according to what is received The system information of area's broadcast selects a node as its father node.

It is the first scene, the second scene, third scene, the 4th in deployment scenario when IAB node is non-initial access It, can also be according to receiving when IAB node access networks network in scape, the 5th scene and the 6th scene in the case where any scene The system information of Cell Broadcast CB selects a node as its father node.

In one example, the system information based on Cell Broadcast CB selects the father node of the IAB node, comprising:

It whether include the proprietary Physical Random Access Channel (Physical of IAB according in the system information of Cell Broadcast CB Random Access Channel, PRACH) configuration, judge whether the cell of the IAB node access supports IAB function.

When including that the proprietary PRACH of IAB is configured in the system information of the received Cell Broadcast CB of IAB node, then can determine The cell of the IAB node access supports IAB function；When not including IAB in the system information of the received Cell Broadcast CB of IAB node When proprietary PRACH is configured, then it can determine that the cell of the IAB node access does not support IAB function.As a result, according to such reality The mode of applying is also ensured that the father node of selection supports IAB function.

According to whether including IAB dedicated system information in the system information of Cell Broadcast CB, the IAB node access is judged Whether cell supports IAB function, wherein the IAB dedicated system information includes cell access barred information, admission control ginseng At least one of number, cell selection parameters, cell reselection parameters.

When in the system information of the received Cell Broadcast CB of IAB node including IAB dedicated system information, then institute can be determined The cell for stating the access of IAB node supports IAB function；When not including IAB special in the system information of the received Cell Broadcast CB of IAB node When with system information, then it can determine that the cell of the IAB node access does not support IAB function.As a result, according to such embodiment party Formula is also ensured that the father node of selection supports IAB function.

The system information for cell reselection based on IAB node or IAB host's distribution unit entity broadcasts selects institute State the father node of IAB node.

IAB node can receive other IAB nodes or the system for cell reselection of IAB donor CU broadcast is believed Breath, wherein the IAB node or IAB donor CU broadcast the system information for cell reselection include it is following at least it One:

Support the frequency information of IAB function；

The cell ID of support IAB function under current registration PLMN；

The cell ID of support IAB function under all PLMN；

Cell Global Identification；

Physical Cell Identifier.

In one example, the access situation of the IAB node is to be initially accessed, and the deployment scenario is the first scene to the One of six scenes, the father node of the determination IAB node, comprising:

In the case where the IAB node access cell, the father node column in operation management maintainance entity configuration information are obtained Table；The father node of the IAB node is selected from the father node list.

It is the first scene, the second scene, third scene, the 4th in deployment scenario when IAB node is to be initially accessed In scape, the 5th scene and the 6th scene in the case where any scene, IAB node is accessed after any one suitable cell, Connection is established with OAM, OAM configuration information is obtained, includes father node list in OAM configuration information, IAB node can be in this father Select a node as its father node in node listing.

Wherein, the father node in father node list obtained in OAM configuration information supports IAB function.

In one example, one of the following is included at least in the father node list obtained in OAM configuration information:

The cell ID of support IAB function under current registration PLMN；

The cell ID of support IAB function under all PLMN；

Cell Global Identification；

Physical Cell Identifier.

In one example, the access situation of the IAB node be non-initial access, the deployment scenario be the first scene extremely One of 6th scene, the father node of the determination IAB node, comprising:

Described in being selected from the father node list obtained in operation management maintainance entity configuration information in the IAB node The father node of IAB node.

It is the first scene, the second scene, third scene, the 4th in deployment scenario when IAB node is non-initial access In scape, the 5th scene and the 6th scene in the case where any scene, IAB node obtained father node list from OAM, It is local to be stored in IAB node, and then a node can be selected as it from the father node list obtained in OAM at this Father node.

Wherein, IAB function is supported from the node in the father node list obtained in OAM.

In one example, one of the following is included at least from the father node list obtained in OAM:

The cell ID of support IAB function under current registration PLMN；

The cell ID of support IAB function under all PLMN；

Cell Global Identification；

Physical Cell Identifier.

The IAB node is selected from the father node list obtained in host's centralized unit entity in the IAB node Father node.

It is the first scene, the second scene, third scene, the 4th in deployment scenario when IAB node is non-initial access In scape, the 5th scene and the 6th scene in the case where any scene, IAB node obtained father node from donor CU It is local to be stored in IAB node, and then can select one from the father node list obtained in donor CU at this for list Node is as its father node.

Wherein, IAB function is supported from the node in the father node list obtained in donor CU.Donor CU storage Father node list in specifically may include and support at least one of IAB donor DU of IAB function, IAB node, gNB.

In one example, one of the following is included at least from the father node list obtained in donor CU:

The cell ID of support IAB function under current registration PLMN；

The cell ID of support IAB function under all PLMN；

Cell Global Identification；

Physical Cell Identifier.

In one example, father node list is obtained from host's centralized unit entity, comprising:

Father node list is sent by host's centralized unit entity described in message request, so that host's centralized unit is real Body receives the rear of request and sends father node list to the IAB node.

IAB node then can send request to donor CU and disappear if it is intended to the acquisition father node list in donor CU Breath, e.g. radio resource control layer request message, to request donor CU to send father node list to the IAB node. After donor CU receives RRC request message, Xiang Suoshu IAB node sends father node list.

In one example, father node list is sent by host's centralized unit entity described in message request, comprising:

Request message or radio resource control layer are established by radio resource control layer establish complete message or wireless Message is completed in Resource Control Layer reconfiguration, and host's centralized unit entity is requested to send father node list.

When IAB node requests donor CU to send father node list by RRC information, it can specifically pass through radio resource control Preparative layer establishes request (RRCSetupRequest) message request donor CU and sends father node list, can also be by wirelessly providing Source control layer, which is established, completes (RRCSetupComplete) message request donor CU transmission father node list, can also pass through nothing The reconfiguration of line Resource Control Layer completes (RRCReconfigurationComplete) message request donor CU and sends father node column Table.

Request message or GNB-DU configuration update message or new F1AP message are established by F1, the host is requested to concentrate Element entity sends father node list.

When IAB node sends father node list by message request donor CU, specifically request can be established by F1 and disappeared Breath request donor CU sends father node list, donor CU can also be requested to send father's section by GNB-DU configuration update message Point list can also send father node list by new F1AP message request donor CU.

It receives host's centralized unit entity and actively passes through the father node list that radio resource control layer message is sent.

The father node list that the received donor CU of IAB is sent can also be that donor CU is actively sent by RRC information 's.

In one example, it receives host's centralized unit entity and actively passes through the father that radio resource control layer message is sent Node listing, comprising:

It receives host's centralized unit entity and actively passes through radio resource control layer reallocation message or radio resource control The father node list that preparative layer release message or radio resource control layer refuse information are sent.

Donor CU actively passes through RRC information to when the transmission father node list of IAB node, can pass through wireless heterogeneous networks Layer reconfiguration (RRCReconfiguration) message sends father node list to IAB node, can also pass through wireless heterogeneous networks Layer release (RRCRelease) message sends father node list to IAB node, can also be refused by radio resource control layer (RRCReject) message sends father node list to IAB node.

Wherein, in the above-described embodiments, node of the donor CU into the father node list that IAB node is sent is supported IAB function.

In one example, donor CU includes at least one of the following into the father node list that IAB node is sent:

The cell ID of support IAB function under current registration PLMN；

The cell ID of support IAB function under all PLMN；

Cell Global Identification；

Physical Cell Identifier.

In one example, the access situation of the IAB node is initial access or non-initial access, the deployment scenario are Second scene, the father node of the determination IAB node, comprising:

In the case where the IAB node access cell, the IAB node access is judged in host's centralized unit entity When DU does not support IAB function, according to the auxiliary operation of host's centralized unit entity, the father of the IAB node is redefined Node.

When IAB node is to be initially accessed, in the case where deployment scenario is the second scene, IAB section accesses any one After suitable cell, donor CU judges whether the DU of the IAB node access supports IAB function, if the IAB node The DU of access does not support IAB function, and donor CU then assists the IAB node to reselect a node as its father node.

When IAB node is non-initial access, in the case where deployment scenario is the second scene, IAB section access is any one After a suitable cell, donor CU judges whether the DU of the IAB node access supports IAB function, if the IAB is saved The DU of point access does not support IAB function, and donor CU then assists the IAB node to reselect a node as his father's section Point.

In one example, according to the auxiliary operation of host's centralized unit entity, the father of the IAB node is redefined Node, comprising:

It, will support IAB corresponding with the switching command according to the switching command that host's centralized unit entity is sent The father node of function is redefined as the father node of the IAB node.

When donor CU judges that the DU of the IAB node access does not support IAB function, it can send and switch to IAB node The father node of IAB node is back switched to the node of a support IAB function by instruction.

The radio resource control layer release message that host's centralized unit entity is sent is received, the company with original DU is disconnected It connects, and obtains the father node list that host's centralized unit entity is sent by radio resource control layer message, according to described Father node list redefines the father node of the IAB node.

When donor CU judges that the DU of IAB node access does not support IAB function, if the IAB node with Do not support the DU connection of IAB function to complete, then it can be by sending RRC release message to the IAB node, so that the IAB After node receives the RRC release message of donor CU transmission, disconnects and this does not support the company between the DU of IAB function It connects.

Donor CU sends father node list to the IAB node by RRC information, and the IAB node is receiving After the father node list that donor CU is sent, a node is reselected as its father node based on the father node list.

The radio resource control layer refuse information that host's centralized unit entity is sent is received, the company with original DU is disconnected It connects, and obtains the father node list that host's centralized unit entity is sent by radio resource control layer message, according to described Father node list redefines the father node of the IAB node.

When donor CU judges that the DU of IAB node access does not support IAB function, if the IAB node with Do not support the DU of IAB function establishing connection, then it can be by sending RRC refuse information to the IAB node, so that described After IAB node receives the RRC refuse information of donor CU transmission, abandon not supporting with this between DU of IAB function Continue attended operation, and after the father node list for receiving donor CU transmission, is selected again based on the father node list A node is selected as its father node.

Wherein, the node in father node list that donor CU is sent by RRC information supports IAB function.

In one example, donor CU is included at least by RRC information into the father node list that IAB node is sent following One of:

The cell ID of support IAB function under current registration PLMN；

The cell ID of support IAB function under all PLMN；

Cell Global Identification；

Physical Cell Identifier.

In one example, from the father node list obtained in host's centralized unit entity, comprising:

Connect donor DU and the IAB node of host's centralized unit entity, and connection host's centralized unit Donor DU and the IAB node of entity adjacent base station.

In the father node list that donor CU is sent, it may both include the donor DU and IAB of the connection donor CU Node, it is also possible to donor DU and the IAB node comprising connecting the base station adjacent with the donor CU.

In one example, host's centralized unit entity knows whether DU supports that the mode of IAB function includes:

It is established described in instruction in request message or GNB-DU configuration update message or new F1AP message according to DU in F1 DU supports IAB function.

DU can establish request message or GNB-DU configuration update message or new F1AP message to donor by F1 CU indicates that it supports IAB function.

In one example, host's centralized unit entity generates or updates the mode of the father node list and includes:

Host's centralized unit entity obtains the base station for supporting IAB function from operation management maintainance entity configuration information List, wherein include the base station information and support IAB function for supporting IAB function in the station list for supporting IAB function Service cell information.

Donor CU can obtain the station list of a support IAB function from OAM, wherein arrange from the base station that OAM is obtained It may include the base station information for supporting IAB function in table, also may include the service cell information for supporting IAB function.

Host's centralized unit entity establishes request message by Xn or NG-RAN node configures more new information, with phase The service cell information of adjacent base station Cross support IAB function.

Donor CU can establish the service cell information of request with adjacent base station Cross support IAB function by Xn, The service cell information of more new information and adjacent base station Cross support IAB function can be configured, by NG-RAN node to reach Obtain service cell information that belong to adjacent base station and support IAB function.

In one example, judge that the DU of the IAB node access does not support IAB function in host's centralized unit entity When, according to the auxiliary operation of host's centralized unit entity, redefine the father node of the IAB node, comprising:

It is established in request message in radio resource control layer and indicates that the IAB node supports IAB function；

When the DU that host's centralized unit entity judges that the IAB node accesses does not support IAB function, according to the place The auxiliary operation of main centralized unit entity redefines the father node of the IAB node.

It is established in radio resource control layer and completes to indicate that the IAB node supports IAB function in message；

Known in host's centralized unit entity by the IAB authorization instruction that initial context establishes request message carrying The IAB node supports IAB function, and when judging that the DU of the IAB node access does not support IAB function, according to the place The auxiliary operation of main centralized unit entity redefines the father node of the IAB node.

That is, IAB node can be established in request message in RRC indicates oneself IAB node identities to donor CU, The IAB node identities of oneself can also be indicated to donor CU in RRC foundation completion message.

Donor CU can also know a node in the IAB authorization instruction that initial context establishes request message carrying IAB node identities, namely know its support IAB function.

When IAB node is when RRC establishes in request message the IAB node identities for indicating oneself to donor CU, one In example, according to the auxiliary operation of host's centralized unit entity, the father node of the IAB node is redefined, comprising:

The radio resource control layer refuse information that host's centralized unit entity is sent is received, the company with original DU is disconnected It connects, and redefines the father node of the IAB node.

When IAB node is when RRC establishes in request message the IAB node identities for indicating oneself to donor CU, donor If CU identifies that the DU of IAB node access does not support IAB function, donor CU if, can send RRC refusal to IAB node and disappear Breath (do not receive at this time IAB node transmission RRC establish complete message), the IAB node receive the RRC refuse information it Afterwards, cell selection is re-started.

In one example, it is included at least in radio resource control layer refuse information one of following:

Support the frequency information of IAB；

The cell ID of support IAB function under current registration PLMN；

The cell ID of support IAB function under all PLMN；

Cell Global Identification；

Physical Cell Identifier.

When IAB node is when RRC establishes in request message the IAB node identities for indicating oneself to donor CU, one In example, if donor CU identifies that the DU of IAB node access does not support IAB function, donor CU if, can received The RRC that IAB node is sent is established after completion message, and Xiang Suoshu IAB node sends RRC release message, and the IAB node receives To after the RRC release message, cell selection is re-started.

In one example, it is included at least in RRC release message one of following:

Support the frequency information of IAB；

The cell ID of support IAB function under current registration PLMN；

The cell ID of support IAB function under all PLMN；

Cell Global Identification；

Physical Cell Identifier.

Host's centralized unit entity is received, after determining that the IAB node initial access process terminates, transmission Radio resource control layer release message disconnects the connection with original DU, and redefines the father node of the IAB node.

When IAB node is when RRC establishes in request message the IAB node identities for indicating oneself to donor CU, donor If CU identifies that the DU of IAB node access does not support IAB function, donor CU if, can wait the IAB node initial After access procedure terminates, Xiang Suoshu IAB node sends RRC release message, and the IAB node receives the RRC release message Later, cell selection is re-started.

Support the frequency information of IAB；

The cell ID of support IAB function under current registration PLMN；

The cell ID of support IAB function under all PLMN；

Cell Global Identification；

Physical Cell Identifier.

It is cut according to what host's centralized unit entity was sent after determining that the IAB node initial access process terminates Instruction is changed, the father that the father node for supporting IAB function corresponding with the switching command is redefined as the IAB node is saved Point.

When IAB node is when RRC establishes in request message the IAB node identities for indicating oneself to donor CU, donor If CU identifies that the DU of IAB node access does not support IAB function, donor CU if, can wait the IAB node initial After access procedure terminates, switching command is sent to IAB node, the father node of IAB node is back switched into a support IAB The node of function.

When IAB node indicates the IAB node identities of oneself to donor CU in RRC foundation completion message, one In example, according to the auxiliary operation of host's centralized unit entity, the father node of the IAB node is redefined, comprising:

The radio resource control layer release message that host's centralized unit entity is sent is received, the company with original DU is disconnected It connects, and redefines the father node of the IAB node.

When IAB node indicates the IAB node identities of oneself to donor CU in RRC foundation completion message, donor If CU identifies that the DU of IAB node access does not support IAB function, donor CU if, can send RRC to the IAB node and release Message is put, after the IAB node receives the RRC release message, re-starts cell selection.

Support the frequency information of IAB；

The cell ID of support IAB function under current registration PLMN；

The cell ID of support IAB function under all PLMN；

Cell Global Identification；

Physical Cell Identifier.

When IAB node indicates the IAB node identities of oneself to donor CU in RRC foundation completion message, donor If CU identifies that the DU of IAB node access does not support IAB function, donor CU if, can wait the IAB node initial After access procedure terminates, Xiang Suoshu IAB node sends RRC release message, and the IAB node receives the RRC release message Later, cell selection is re-started.

Support the frequency information of IAB；

The cell ID of support IAB function under current registration PLMN；

The cell ID of support IAB function under all PLMN；

Cell Global Identification；

Physical Cell Identifier.

When IAB node indicates the IAB node identities of oneself to donor CU in RRC foundation completion message, donor If CU identifies that the DU of IAB node access does not support IAB function, donor CU if, can wait the IAB node initial After access procedure terminates, switching command is sent to IAB node, the father node of IAB node is back switched into a support IAB The node of function.

When donor CU knows the IAB of IAB node in the IAB authorization instruction that initial context establishes request message carrying When node identities, in one example, according to the auxiliary operation of host's centralized unit entity, the IAB node is redefined Father node, comprising:

When donor CU knows the IAB of IAB node in the IAB authorization instruction that initial context establishes request message carrying When node identities, if donor CU identifies that the DU of IAB node access does not support IAB function, donor CU if, can waited After to the end of the IAB node initial access process, Xiang Suoshu IAB node sends RRC release message, and the IAB node connects After receiving the RRC release message, cell selection is re-started.

Support the frequency information of IAB；

The cell ID of support IAB function under current registration PLMN；

The cell ID of support IAB function under all PLMN；

Cell Global Identification；

Physical Cell Identifier.

When donor CU knows the IAB of IAB node in the IAB authorization instruction that initial context establishes request message carrying When node identities, donor CU can then be sent after waiting the IAB node initial access process to terminate to IAB node The father node of IAB node is back switched to the node of a support IAB function by switching command.

In one example, the above method further include: according to the configuration more new information that operation management maintainance entity is sent, to this The father node list that ground saves is updated.

In the case where IAB node has locally stored father node list, if OAM is that the IAB node is configured with Father node list, IAB node can be updated the father node list being locally stored according to the configuration information of OAM.

In one example, after the father node list of OAM storage changes, OAM can be changed by IAB function Parent information is sent to the IAB node, so that the IAB node changed parent information of IAB function based on the received The father node list being locally stored is updated.

In one example, after the father node list of OAM storage changes, OAM can be arranged updated father node Table is sent to IAB node, so that father node list carries out more the father node list being locally stored to IAB node based on the received Newly.

In one example, one of the following is included at least in the father node list of OAM storage:

The cell ID of support IAB function under current registration PLMN；

The cell ID of support IAB function under all PLMN；

Cell Global Identification；

Physical Cell Identifier.

In one example, the above method further include: right according to the father node more new information that host's centralized unit entity is sent The father node list locally saved is updated.

It includes IAB donor DU and/or the IAB node and/or gNB for supporting IAB function that one is stored in donor CU Father node more new information is sent to IAB node, so that IAB if the list stored in donor CU changes by list Node is updated the father node list being locally stored.

In one example, the father node more new information sent according to host's centralized unit entity, to what is locally saved Father node list is updated, comprising:

According to host's centralized unit entity by radio resource control layer message or F1 establish response message or The parent information for the IAB function change that GNB-CU configuration update message or new F1AP message are sent, to what is be locally stored Father node list is updated.

If thering is IAB donor DU or IAB node or gNB to support the function hair of IAB in the list stored in donor CU Raw to change, the information for IAB donor DU, IAB node and the gNB that IAB function changes can be sent to by donor CU IAB node, wherein response message or GNB-CU configuration update message or new can be established by RRC reallocation message or F1 F1AP message to IAB node send so that the father node list of IAB node updates local.

According to host's centralized unit entity by radio resource control layer message or F1 establish response message or The father node list of update that GNB-CU configuration update message or new F1AP message are sent, arranges the father node being locally stored Table is updated.

If thering is IAB donor DU or IAB node or gNB to support the function hair of IAB in the list stored in donor CU Raw to change, the father node list after local update can be sent to IAB node by donor CU, wherein can be reconfigured by RRC Message or F1 establish response message or GNB-CU configuration update message or new F1AP message and send to IAB node, with Make the father node list of IAB node updates local.

In one example, IAB node can also be according to the father node list carried in RRC release message to local father node List is updated.

In one example, IAB node can also be saved according to the father node list update local father carried in RRC refuse information Point list.

In one example, one of the following is included at least in the father node list stored in donor CU:

The cell ID of support IAB function under current registration PLMN；

The cell ID of support IAB function under all PLMN；

Cell Global Identification；

Physical Cell Identifier.

In an exemplary embodiment, Figure 10 is a kind of process signal of father node selection method provided by the present application Figure.This method can be adapted for the case where IAB selects the father node of a support IAB function when accessing network.This method can To be executed by the father node selection device provided by the present application applied to AMF entity, which can be by software And/or hardware realization, and be integrated in AMF entity.

As shown in Figure 10, a kind of father node selection method provided by the present application applied to AMF entity, comprising:

S220, the switching based on NG interface save the IAB of the IAB authorization instruction information of IAB node or the IAB node Point instruction is sent to host's centralized unit entity corresponding with target father node or base station.

Wherein, the switching based on NG interface is mainly included in IAB node father node switching front and back, the connection of IAB node The case where donor CU or base station connect the case where identical AMF entity, connect different AMF entities, and the different RAT of connection The case where (Radio Access Technology, radio access technologies).

A kind of father node selection method provided by the present application, IAB node according to the access situation of the IAB node and The deployment scenario of IAB node access networks network, after the target father node for determining the IAB node, by the IAB node The IAB node instruction of IAB authorization instruction information or the IAB node is sent to host's centralized unit corresponding with target father node Entity or base station, realize the connection of the father node for the support IAB function that IAB node is selected with it, and then make IAB node IAB function is guaranteed, has been achieved the effect that for other sub- IAB nodes and UE service.

In one example, the IAB node of the IAB authorization instruction information of the IAB node or the IAB node is indicated into hair Give host's centralized unit entity corresponding with target father node or base station, comprising:

By the IAB node instruction of the IAB authorization instruction information of the IAB node or the IAB node, pass through NGAP (Next Generation Application Protocol, next-generation application protocol) switching request message is sent to and target The corresponding host's centralized unit entity of father node or base station.

By the IAB node instruction of the IAB authorization instruction information of the IAB node or the IAB node, passage path switching Request confirmation message is sent to host's centralized unit entity corresponding with target father node or base station.

The present embodiment additionally provides father node selection device, and Figure 11 is a kind of father node selection device provided by the present application Structural schematic diagram, as shown in figure 11, a kind of father node selection device applied in IAB node provided by the embodiments of the present application, It can integrate in IAB node, which includes:

First father node selecting module 320 is set as access situation and IAB node access networks network according to IAB node Deployment scenario, determine the father node of the IAB node.

Father node selection device provided in this embodiment applied in IAB node is for realizing such as the embodiment of the present application institute The father node selection method being applied in IAB node stated, the father node selection provided in this embodiment applied in IAB node The father node selection method class being applied in IAB node described in device implementing principle and technical effect and the embodiment of the present application Seemingly, details are not described herein again.

Wherein, the IAB node of an IAB node is known as the sub- IAB node of this IAB node, and an IAB node is to connect The DU for the support IAB function that identity is accessed or base station are known as father's IAB node of this IAB node.

The IAB node can be DU entity, be also possible to MT.

In one example, the access situation of the IAB node is initial access or non-initial access, the deployment scenario are One of first scene to the 6th scene, the setting of the first father node selecting module 320 are as follows: in father's section that the IAB node is pre-configured The father node of the IAB node is selected in point list.

The cell ID of support IAB function under current registration PLMN；

The cell ID of support IAB function under all PLMN；

Cell Global Identification；

Physical Cell Identifier.

In one example, above-mentioned apparatus further includes father node IAB function judgment module, setting are as follows: the IAB node access In the case where cell, whether include the configuration message judgement of backhaul self-adapted protocol layer according in radio resource control layer reallocation message Whether the distribution unit entity of the IAB node access or base station support IAB function.

In one example, the access situation of the IAB node is initial access or non-initial access, the deployment scenario are One of first scene to the 6th scene, the setting of the first father node selecting module 320 are as follows: the system information selection based on Cell Broadcast CB The father node of the IAB node.

In one example, the access situation of the IAB node is initial access or non-initial access, the deployment scenario are One of first scene to the 6th scene, the first father node selecting module 320 setting are as follows: be according in the system information of Cell Broadcast CB No includes the proprietary PRACH configuration of IAB, judges whether the cell of the IAB node access supports IAB function.

In one example, the access situation of the IAB node is initial access or non-initial access, the deployment scenario are One of first scene to the 6th scene, the first father node selecting module 320 setting are as follows: be according in the system information of Cell Broadcast CB No includes IAB dedicated system information, judges whether the cell of the IAB node access supports IAB function, wherein the IAB is special With system information include cell access barred information, admission control parameter, cell selection parameters, in cell reselection parameters at least It is a kind of.

In one example, the access situation of the IAB node is initial access or non-initial access, the deployment scenario are One of first scene to the 6th scene, the first father node selecting module 320 setting are as follows: be distributed based on IAB node or IAB host The system information for cell reselection of element entity broadcast selects the father node of the IAB node.

Wherein, the IAB node or the system information for cell reselection of IAB donor CU broadcast include following At least one:

Support the frequency information of IAB function；

The cell ID of support IAB function under current registration PLMN；

The cell ID of support IAB function under all PLMN；

Cell Global Identification；

Physical Cell Identifier.

In one example, the access situation of the IAB node is to be initially accessed, and the deployment scenario is the first scene to the One of six scenes, the setting of the first father node selecting module 320 are as follows: in the case where the IAB node access cell, obtain operation pipe Manage the father node list in maintenance entity configuration information；The father node of the IAB node is selected from the father node list.

The cell ID of support IAB function under current registration PLMN；

The cell ID of support IAB function under all PLMN；

Cell Global Identification；

Physical Cell Identifier.

In one example, the access situation of the IAB node be non-initial access, the deployment scenario be the first scene extremely One of 6th scene, the first father node selecting module 320 setting are as follows: obtained from OAM configuration information in the IAB node The father node of the IAB node is selected in father node list.

The cell ID of support IAB function under current registration PLMN；

The cell ID of support IAB function under all PLMN；

Cell Global Identification；

Physical Cell Identifier.

In one example, the access situation of the IAB node be non-initial access, the deployment scenario be the first scene extremely One of 6th scene, the first father node selecting module 320 setting are as follows: the IAB node from host's centralized unit entity The father node of the IAB node is selected in the father node list of acquisition.

The cell ID of support IAB function under current registration PLMN；

The cell ID of support IAB function under all PLMN；

Cell Global Identification；

Physical Cell Identifier.

In one example, the first father node selecting module 320 is arranged are as follows: passes through the reality of host's centralized unit described in message request Body sends father node list, so that host's centralized unit entity receives the rear of request and sends father's section to the IAB node Point list, and the IAB node is selected from the father node list obtained in host's centralized unit entity in the IAB node Father node.

In one example, the first father node selecting module 320 is arranged are as follows: establishes request message by radio resource control layer Either radio resource control layer, which is established, completes message or radio resource control layer reconfiguration completion message, and the host is requested to concentrate Element entity sends father node list, and the father node list obtained from host's centralized unit entity in the IAB node The father node of the middle selection IAB node.

In one example, the first father node selecting module 320 is arranged are as follows: establishes request message by F1 or GNB-DU is configured Update message or new F1AP message request host's centralized unit entity to send father node list, and in the IAB node The father node of the IAB node is selected from the father node list obtained in host's centralized unit entity.

In one example, the first father node selecting module 320 is arranged are as follows: it is actively logical to receive host's centralized unit entity The father node list of radio resource control layer message transmission is crossed, and has been obtained from host's centralized unit entity in the IAB node The father node of the IAB node is selected in the father node list taken.

In one example, the first father node selecting module 320 is arranged are as follows: it is actively logical to receive host's centralized unit entity Cross radio resource control layer reallocation message or radio resource control layer release message or radio resource control layer refuse information The father node list of transmission, and selected from the father node list obtained in host's centralized unit entity in the IAB node The father node of the IAB node.

The cell ID of support IAB function under current registration PLMN；

The cell ID of support IAB function under all PLMN；

Cell Global Identification；

Physical Cell Identifier.

In one example, the access situation of the IAB node is initial access or non-initial access, the deployment scenario are Second scene, the setting of the first father node selecting module 320 are as follows: in the case where the IAB node access cell, concentrated in host single When first entity judges that the DU of the IAB node access does not support IAB function, according to the auxiliary of host's centralized unit entity Operation, redefines the father node of the IAB node.

In one example, the access situation of the IAB node is initial access or non-initial access, the deployment scenario are Second scene, the setting of the first father node selecting module 320 are as follows: in the case where the IAB node access cell, concentrated in host single When first entity judges that the DU of the IAB node access does not support IAB function, sent according to host's centralized unit entity Switching command saves the father that the father node for supporting IAB function corresponding with the switching command is redefined as the IAB node Point.

In one example, the access situation of the IAB node is initial access or non-initial access, the deployment scenario are Second scene, the setting of the first father node selecting module 320 are as follows: in the case where the IAB node access cell, concentrated in host single When first entity judges that the DU of the IAB node access does not support IAB function, receive what host's centralized unit entity was sent Radio resource control layer release message disconnects the connection with original DU, and obtains host's centralized unit entity and pass through wirelessly The father node list that Resource Control Layer message is sent, the father node of the IAB node is redefined according to the father node list.

In one example, the access situation of the IAB node is initial access or non-initial access, the deployment scenario are Second scene, the setting of the first father node selecting module 320 are as follows: in the case where the IAB node access cell, concentrated in host single When first entity judges that the DU of the IAB node access does not support IAB function, receive what host's centralized unit entity was sent Radio resource control layer refuse information disconnects the connection with original DU, and obtains host's centralized unit entity and pass through wirelessly The father node list that Resource Control Layer message is sent, the father node of the IAB node is redefined according to the father node list.

The cell ID of support IAB function under current registration PLMN；

The cell ID of support IAB function under all PLMN；

Cell Global Identification；

Physical Cell Identifier.

In one example, the father node list obtained from host's centralized unit entity, comprising:

In one example, the access situation of the IAB node is initial access or non-initial access, the deployment scenario are Second scene, the setting of the first father node selecting module 320 are as follows: established in request message described in instruction in radio resource control layer IAB node supports IAB function；Judge that the DU of the IAB node access does not support IAB function in host's centralized unit entity When, according to the auxiliary operation of host's centralized unit entity, redefine the father node of the IAB node.

In one example, the access situation of the IAB node is initial access or non-initial access, the deployment scenario are Second scene, the setting of the first father node selecting module 320 are as follows: established in request message described in instruction in radio resource control layer IAB node supports IAB function；The radio resource control layer refuse information that host's centralized unit entity is sent is received, is disconnected With the connection of original DU, and the father node of the IAB node is redefined.

Support the frequency information of IAB；

The cell ID of support IAB function under current registration PLMN；

The cell ID of support IAB function under all PLMN；

Cell Global Identification；

Physical Cell Identifier.

In one example, the access situation of the IAB node is initial access or non-initial access, the deployment scenario are Second scene, the setting of the first father node selecting module 320 are as follows: established in request message described in instruction in radio resource control layer IAB node supports IAB function；Receive what host's centralized unit entity was sent after receiving RRC and establishing completion message Radio resource control layer release message disconnects the connection with original DU, and redefines the father node of the IAB node.

Support the frequency information of IAB；

The cell ID of support IAB function under current registration PLMN；

The cell ID of support IAB function under all PLMN；

Cell Global Identification；

Physical Cell Identifier.

In one example, the access situation of the IAB node is initial access or non-initial access, the deployment scenario are Second scene, the setting of the first father node selecting module 320 are as follows: established in request message described in instruction in radio resource control layer IAB node supports IAB function；Host's centralized unit entity is received, is determining that the IAB node initial access process terminates Later, the radio resource control layer release message of transmission disconnects the connection with original DU, and redefines the IAB node Father node.

Support the frequency information of IAB；

The cell ID of support IAB function under current registration PLMN；

The cell ID of support IAB function under all PLMN；

Cell Global Identification；

Physical Cell Identifier.

In one example, the access situation of the IAB node is initial access or non-initial access, the deployment scenario are Second scene, the setting of the first father node selecting module 320 are as follows: established in request message described in instruction in radio resource control layer IAB node supports IAB function；Determining that the IAB node initial access process terminates according to host's centralized unit entity The father node for supporting IAB function corresponding with the switching command is redefined as the IAB by the switching command sent later The father node of node.

In one example, the access situation of the IAB node is initial access or non-initial access, the deployment scenario are Second scene, the setting of the first father node selecting module 320 are as follows: establish and completed in message described in instruction in radio resource control layer IAB node supports IAB function；Judge that the DU of the IAB node access does not support IAB function in host's centralized unit entity When, according to the auxiliary operation of host's centralized unit entity, redefine the father node of the IAB node.

In one example, the access situation of the IAB node is initial access or non-initial access, the deployment scenario are Second scene, the setting of the first father node selecting module 320 are as follows: establish and completed in message described in instruction in radio resource control layer IAB node supports IAB function；The radio resource control layer release message that host's centralized unit entity is sent is received, is disconnected With the connection of original DU, and the father node of the IAB node is redefined.

Support the frequency information of IAB；

The cell ID of support IAB function under current registration PLMN；

The cell ID of support IAB function under all PLMN；

Cell Global Identification；

Physical Cell Identifier.

In one example, the access situation of the IAB node is initial access or non-initial access, the deployment scenario are Second scene, the setting of the first father node selecting module 320 are as follows: establish and completed in message described in instruction in radio resource control layer IAB node supports IAB function；Host's centralized unit entity is received, is determining that the IAB node initial access process terminates Later, the radio resource control layer release message of transmission disconnects the connection with original DU, and redefines the IAB node Father node.

Support the frequency information of IAB；

The cell ID of support IAB function under current registration PLMN；

The cell ID of support IAB function under all PLMN；

Cell Global Identification；

Physical Cell Identifier.

In one example, the access situation of the IAB node is initial access or non-initial access, the deployment scenario are Second scene, the setting of the first father node selecting module 320 are as follows: establish and completed in message described in instruction in radio resource control layer IAB node supports IAB function；Determining that the IAB node initial access process terminates according to host's centralized unit entity The father node for supporting IAB function corresponding with the switching command is redefined as the IAB by the switching command sent later The father node of node.

In one example, the access situation of the IAB node is initial access or non-initial access, the deployment scenario are Second scene, the setting of the first father node selecting module 320 are as follows: established in host's centralized unit entity by initial context The IAB authorization instruction that request message carries knows that the IAB node supports IAB function, and judges the IAB node access When DU does not support IAB function, according to the auxiliary operation of host's centralized unit entity, the father of the IAB node is redefined Node.

In one example, the access situation of the IAB node is initial access or non-initial access, the deployment scenario are Second scene, the setting of the first father node selecting module 320 are as follows: established in host's centralized unit entity by initial context The IAB authorization instruction that request message carries knows that the IAB node supports IAB function, and judges the IAB node access When DU does not support IAB function, host's centralized unit entity is received, is determining that the IAB node initial access process terminates Later, the radio resource control layer release message of transmission disconnects the connection with original DU, and redefines the IAB node Father node.

Support the frequency information of IAB；

The cell ID of support IAB function under current registration；

The cell ID of support IAB function under all；

Cell Global Identification；

Physical Cell Identifier.

In one example, the access situation of the IAB node is initial access or non-initial access, the deployment scenario are Second scene, the setting of the first father node selecting module 320 are as follows: established in host's centralized unit entity by initial context The IAB authorization instruction that request message carries knows that the IAB node supports IAB function, and judges the IAB node access When DU does not support IAB function, determining that the IAB node initial access process terminates it according to host's centralized unit entity The father node for supporting IAB function corresponding with the switching command is redefined as the IAB and saved by the switching command sent afterwards The father node of point.

In one example, above-mentioned apparatus further includes the first father node list update module, setting are as follows: tieed up according to operational administrative The configuration more new information that entity is sent is protected, the father node list locally saved is updated.

In one example, the first father node list update module, setting are as follows: sent according to operation management maintainance entity The changed parent information of IAB function is updated the father node list locally saved.

In one example, the first father node list update module, setting are as follows: sent more according to operation management maintainance entity Father node list after new, is updated the father node list locally saved.

The cell ID of support IAB function under current registration PLMN；

The cell ID of support IAB function under all PLMN；

Cell Global Identification；

Physical Cell Identifier.

In one example, above-mentioned apparatus further includes the second father node list update module, setting are as follows: is concentrated according to host single The father node more new information that first entity is sent, is updated the father node list locally saved.

In one example, the second father node list update module, setting are as follows: passed through according to host's centralized unit entity Radio resource control layer message or F1 establish response message or GNB-CU configuration update message or new F1AP message hair The parent information for the IAB function change sent, is updated the father node list being locally stored.

In one example, the second father node list update module, setting are as follows: passed through according to host's centralized unit entity Radio resource control layer message or F1 establish response message or GNB-CU configuration update message or new F1AP message hair The father node list of update sent, is updated the father node list being locally stored.

In one example, the second father node list update module, setting are as follows: saved according to the father carried in RRC release message Point list is updated local father node list.

In one example, the second father node list update module, setting are as follows: saved according to the father carried in RRC refuse information Point list updates local father node list.

The cell ID of support IAB function under current registration PLMN；

The cell ID of support IAB function under all PLMN；

Cell Global Identification；

Physical Cell Identifier.

The present embodiment additionally provides father node selection device, and Figure 12 is a kind of father node selection device provided by the present application Structural schematic diagram, as shown in figure 12, a kind of father node selection device applied in AMF entity provided by the embodiments of the present application, It can integrate in AMF entity, which includes:

Second father node selecting module 420, is set as the switching based on NG interface, by the IAB authorization instruction letter of IAB node The instruction of the IAB node of breath or the IAB node is sent to host's centralized unit entity corresponding with target father node or base station.

Father node selection device provided in this embodiment applied in AMF entity is for realizing such as the embodiment of the present application institute The father node selection method being applied in AMF entity stated, the father node selection provided in this embodiment applied in AMF entity The father node selection method class being applied in AMF entity described in device implementing principle and technical effect and the embodiment of the present application Seemingly, details are not described herein again.

In one example, the second father node selecting module 420 is arranged are as follows: by the IAB authorization instruction information of the IAB node Or the IAB node instruction of the IAB node, host corresponding with target father node is sent to by NGAP switching request message and is collected Middle element entity or base station.

In one example, the second father node selecting module 420 is arranged are as follows: by the IAB authorization instruction information of the IAB node Or the IAB node instruction of the IAB node, passage path switching request acknowledgement message are sent to corresponding with target father node Host's centralized unit entity or base station.

The embodiment of the present application provides a kind of IAB node, and Figure 13 is a kind of structural representation of IAB node provided by the present application Figure, as shown in figure 13, IAB node provided by the present application, comprising: one or more processors 510 and storage device 520；The IAB The processor 510 of node can be one or more, in Figure 13 by taking a processor 510 as an example；Storage device 520 is for storing One or more programs；One or more of programs are executed by one or more of processors 510 so that it is one or Multiple processors 510 realize the father node selection method for being applied to IAB node as described in the embodiment of the present invention.

Processor 510, storage device 520 in IAB node can be connected by bus or other modes, with logical in Figure 13 It crosses for bus connection.

Storage device 520 is used as a kind of computer readable storage medium, may be configured as storage software program, computer can be held Line program and module, as described in the embodiment of the present application applied to IAB node the corresponding program instruction of father node selection method/ Module (for example, being applied to the first father node selecting module 320 in the father node selection device of IAB node).Storage device 520 It may include storing program area and storage data area, wherein storing program area can be needed for storage program area, at least one function Application program；Storage data area, which can be stored, uses created data etc. according to equipment.In addition, storage device 520 can wrap High-speed random access memory is included, can also include nonvolatile memory, for example, at least disk memory, a flash memories Part or other non-volatile solid state memory parts.In some instances, storage device 520 can further comprise relative to processing The remotely located memory of device 510, these remote memories can pass through network connection to first node.The example of above-mentioned network Including but not limited to internet, intranet, local area network, mobile radio communication and combinations thereof.

The embodiment of the present application provides a kind of access management function entity, and Figure 14 is a kind of access-in management provided by the present application The structural schematic diagram of functional entity, as shown in figure 14, access management function entity provided by the present application, comprising: one or more Processor 610 and storage device 620；The processor 610 of the access management function entity can be one or more, in Figure 14 with For one processor 610；Storage device 620 is for storing one or more programs；One or more of programs are described One or more processors 610 execute, so that one or more of processors 610 are realized as described in the embodiment of the present invention Father node selection method applied to access management function entity.

Processor 610, storage device 620 in access management function entity can be connected by bus or other modes, In Figure 14 for being connected by bus.

Storage device 620 is used as a kind of computer readable storage medium, may be configured as storage software program, computer can be held Line program and module, the father node selection method as described in the embodiment of the present application applied to access management function entity are corresponding Program instruction/module is (for example, the first father node being applied in the father node selection device of access management function entity selects mould Block 420).Storage device 620 may include storing program area and storage data area, wherein storing program area can storage program area, Application program needed at least one function；Storage data area, which can be stored, uses created data etc. according to equipment.In addition, Storage device 620 may include high-speed random access memory, can also include nonvolatile memory, for example, at least a magnetic Disk storage device, flush memory device or other non-volatile solid state memory parts.In some instances, storage device 620 can be into one Step includes the memory remotely located relative to processor 610, these remote memories can pass through network connection to first segment Point.The example of above-mentioned network includes but is not limited to internet, intranet, local area network, mobile radio communication and combinations thereof.

The embodiment of the present application also provides a kind of storage medium, and the storage medium is stored with computer program, the calculating Machine program realizes any father node selection method applied to IAB node in the embodiment of the present application when being executed by processor Or any father node selection method applied to access management function entity in the embodiment of the present application.

It wherein, include: to be saved according to the access situation and IAB of IAB node applied to the father node selection method of IAB node The deployment scenario of point access network, determines the father node of the IAB node.

Father node selection method applied to access management function entity includes: the switching based on NG interface, IAB is saved The IAB authorization instruction information of point or the IAB node instruction of the IAB node are sent to host corresponding with target father node and concentrate Element entity or base station.

The above, the only exemplary embodiment of the application, are not intended to limit the protection scope of the application.

It should be understood by those skilled in the art that, terms user terminal covers the wireless user equipment of any suitable type, Such as mobile phone, portable data processing device, portable web browser or vehicle-mounted mobile platform.

In general, the various embodiments of the application can be in hardware or special circuit, software, logic or any combination thereof Middle realization.For example, some aspects can be implemented within hardware, and can be implemented in can be by controller, micro- for other aspects In the firmware or software that processor or other computing devices execute, although the application is without being limited thereto.

Embodiments herein can execute computer program instructions by the data processor of entity apparatus and realize, example Such as in processor entity, perhaps pass through hardware or the combination by software and hardware.Computer program instructions can be remittance Volume instruction, instruction set architecture (Instruction Set Architecture, ISA) instruction, machine instruction, machine correlation refer to It enables, microcode, firmware instructions, condition setup data or the source generation write with any combination of one or more programming languages Code or object code.

The block diagram of any logic flow in illustrations can be with representation program step, or can indicate to be connected with each other Logic circuit, module and function, or can be with the combination of representation program step and logic circuit, module and function.Computer Program can store on a memory.Memory can have any type for being suitable for local technical environment and can be used Any suitable data storage technology realizes, such as, but not limited to read-only memory (Read-Only Memory, ROM), random Access memory (Random Access Memory, RAM), optical memory device and system (digital video disc (Digital Video Disc, DVD) or CD (Compact Disk, CD)) etc..Computer-readable medium may include non-wink When property storage medium.Data processor can be any type for being suitable for local technical environment, such as, but not limited to general meter Calculation machine, special purpose computer, microprocessor, digital signal processor (Digital Signal Processing, DSP), dedicated collection At circuit (Application Specific Integrated Circuit, ASIC), programmable logic device (Field- Programmable Gate Array, FGPA) and processor based on multi-core processor framework.

By exemplary and unrestricted example, retouching in detail to the example embodiment of the application has had been provided above It states.But consider in conjunction with drawings and claims, a variety of modifications and adjustment to above embodiments carry out those skilled in the art Say it is it will be apparent that but without departing from the scope of the present invention.Therefore, appropriate range of the invention will be determined according to claim.

Claims

1. a kind of father node selection method is applied to from access return link IAB node characterized by comprising

According to the access situation of IAB node and the deployment scenario of IAB node access networks network, father's section of the IAB node is determined Point.

2. the method according to claim 1, wherein the IAB node includes distribution network element DU and mobile terminal At least one of MT.

3. the method according to claim 1, wherein the access situation of the IAB node is initial access or non- It is initially accessed, the deployment scenario is one of first scene to the 6th scene, the father node of the determination IAB node, packet It includes:

The father node of the IAB node is selected in the father node list that the IAB node is pre-configured；

Wherein, the first scene are as follows: include IAB host's distribution unit entity donor in the setting regions of IAB node deployment position DU, IAB node and the base station for supporting IAB function；

Second scene are as follows: include IAB donor DU in the setting regions of IAB node deployment position and do not support IAB function Distribution unit entity, the distribution unit entity connection host's centralized unit entity donor CU for not supporting IAB function；

Third scene are as follows: include IAB donor DU, IAB node in the setting regions of IAB node deployment position and do not support The base station of IAB function, the access management function entity connecting with the base station support IAB function；

4th scene are as follows: include IAB donor DU, IAB node in the setting regions of IAB node deployment position and do not support The base station of IAB function, the access management function entity connecting with the base station do not support IAB function；

5th scene are as follows: include IAB donor DU, IAB node in the setting regions of IAB node deployment position and do not support The distribution unit entity of IAB function, the centralized unit entity connecting with the distribution unit entity for not supporting IAB function do not prop up IAB function is held, the access management function entity connecting with the centralized unit entity supports IAB function；

6th scene are as follows: include IAB donor DU, IAB node in the setting regions of IAB node deployment position and do not support The distribution unit entity of IAB function, the centralized unit entity connecting with the distribution unit entity for not supporting IAB function do not prop up IAB function is held, the access management function entity connecting with the centralized unit entity does not support IAB function.

4. the method according to claim 1, wherein the access situation of the IAB node is initial access or non- It is initially accessed, the deployment scenario is one of first scene to the 6th scene, the father node of the determination IAB node, packet It includes:

5. according to the method described in claim 4, it is characterized in that, the system information based on Cell Broadcast CB selects the IAB section The father node of point, comprising:

According to whether including the proprietary Physical Random Access Channel configuration of IAB in the system information of Cell Broadcast CB, the IAB section is judged Whether the cell of point access supports IAB function；Alternatively,

According to whether including IAB dedicated system information in the system information of Cell Broadcast CB, the cell of the IAB node access is judged Whether IAB function is supported, wherein the IAB dedicated system information includes cell access barred information, admission control parameter, small At least one of area's selection parameter, cell reselection parameters；Or

The system information for cell reselection based on IAB node or IAB host's distribution unit entity broadcasts selects the IAB The father node of node, wherein the system information for cell reselection includes at least one following:

Support the frequency information of IAB function；

The cell ID of support IAB function under current registering public land mobile network；

The cell ID of support IAB function under all public land mobile networks；

Cell Global Identification；

Physical Cell Identifier.

6. the method according to claim 1, wherein the access situation of the IAB node be initially accessed, it is described Deployment scenario is one of first scene to the 6th scene, the father node of the determination IAB node, comprising:

In the case where the IAB node access cell, the father node list in operation management maintainance entity configuration information is obtained；

The father node of the IAB node is selected from the father node list.

7. the method according to claim 1, wherein the access situation of the IAB node is non-initial access, institute Stating deployment scenario is one of first scene to the 6th scene, the father node of the determination IAB node, comprising:

The IAB is selected from the father node list obtained in operation management maintainance entity configuration information in the IAB node The father node of node.

8. the method according to claim 1, wherein the access situation of the IAB node is non-initial access, institute Stating deployment scenario is one of first scene to the 6th scene, the father node of the determination IAB node, comprising:

The father of the IAB node is selected from the father node list obtained in host's centralized unit entity in the IAB node Node.

9. according to the method described in claim 8, it is characterized in that, obtaining father node column from host's centralized unit entity Table, comprising:

Father node list is sent by host's centralized unit entity described in message request, so that host's centralized unit entity connects It receives the rear of request and sends father node list to the IAB node；Alternatively,

10. according to the method described in claim 9, it is characterized in that, passing through the hair of host's centralized unit entity described in message request Send father node list, comprising:

Request message is established by radio resource control layer or radio resource control layer is established and completes message or radio resource Message is completed in control layer reconfiguration, and host's centralized unit entity is requested to send father node list；Alternatively,

Request message or GNB-DU configuration update message or new F1AP message are established by F1, requests host's centralized unit Entity sends father node list；

It receives host's centralized unit entity and actively passes through the father node list that radio resource control layer message is sent, comprising:

It receives host's centralized unit entity and actively passes through radio resource control layer reallocation message or radio resource control layer The father node list that release message or radio resource control layer refuse information are sent.

11. the method according to claim 1, wherein the access situation of the IAB node is initial access or non- It is initially accessed, the deployment scenario is the second scene, the father node of the determination IAB node, comprising:

In the case where the IAB node access cell, the DU of the IAB node access is judged not in host's centralized unit entity When supporting IAB function, according to the auxiliary operation of host's centralized unit entity, the father node of the IAB node is redefined.

12. according to the method for claim 11, which is characterized in that grasped according to the auxiliary of host's centralized unit entity Make, redefine the father node of the IAB node, comprising:

It, will support IAB function corresponding with the switching command according to the switching command that host's centralized unit entity is sent Father node be redefined as the father node of the IAB node；Alternatively,

The radio resource control layer release message or radio resource control layer for receiving host's centralized unit entity transmission are refused Exhausted message disconnects the connection with original DU, and obtains host's centralized unit entity and sent out by radio resource control layer message The father node list sent redefines the father node of the IAB node according to the father node list.

13. the method according to any one of claim 3,6,7,8 and 12, which is characterized in that the father node list is extremely Less include one of the following:

The cell ID of support IAB function under all public land mobile networks；

Cell Global Identification；

Physical Cell Identifier.

14. the method according to claim 8 or 12, which is characterized in that obtained from host's centralized unit entity Father node list, comprising:

Connect donor DU and the IAB node of host's centralized unit entity, and connection host's centralized unit entity Donor DU and the IAB node of adjacent base station.

15. according to the method for claim 14, which is characterized in that host's centralized unit entity knows whether DU supports The mode of IAB function includes:

It is established in request message or GNB-DU configuration update message or new F1AP message according to DU in F1 and indicates the DU branch Hold IAB function.

16. according to the method for claim 14, which is characterized in that described in host's centralized unit entity generation or update The mode of father node list includes:

Host's centralized unit entity obtains the base station column for supporting IAB function from operation management maintainance entity configuration information Table, wherein include the base station information and support IAB function for supporting IAB function in the station list for supporting IAB function Service cell information；Alternatively,

Host's centralized unit entity establishes request message by Xn or NG-RAN node configures more new information, with adjacent base The service cell information for Cross support IAB function of standing.

17. according to the method for claim 11, which is characterized in that judge the IAB section in host's centralized unit entity When the DU of point access does not support IAB function, according to the auxiliary operation of host's centralized unit entity, the IAB is redefined The father node of node, comprising:

When the DU that host's centralized unit entity judges that the IAB node accesses does not support IAB function, collected according to the host The auxiliary operation of middle element entity redefines the father node of the IAB node.

18. according to the method for claim 17, which is characterized in that grasped according to the auxiliary of host's centralized unit entity Make, redefine the father node of the IAB node, comprising:

The radio resource control layer refuse information that host's centralized unit entity is sent is received, the connection with original DU is disconnected, And redefine the father node of the IAB node；

Wherein, it is included at least in radio resource control layer refuse information one of following:

Support the frequency information of IAB；

The cell ID of support IAB function under all public land mobile networks；

Cell Global Identification；

Physical Cell Identifier.

19. according to the method for claim 11, which is characterized in that judge the IAB section in host's centralized unit entity When the DU of point access does not support IAB function, according to the auxiliary operation of host's centralized unit entity, the IAB is redefined The father node of node, comprising:

20. according to the method for claim 19, which is characterized in that grasped according to the auxiliary of host's centralized unit entity Make, redefine the father node of the IAB node, comprising:

The radio resource control layer release message that host's centralized unit entity is sent is received, the connection with original DU is disconnected, And redefine the father node of the IAB node；

One of the following is included at least in radio resource control layer release message:

Support the frequency information of IAB；

The cell ID of support IAB function under all public land mobile networks；

Cell Global Identification；

Physical Cell Identifier.

21. according to the method for claim 11, which is characterized in that judge the IAB section in host's centralized unit entity When the DU of point access does not support IAB function, according to the auxiliary operation of host's centralized unit entity, the IAB is redefined The father node of node, comprising:

Known in host's centralized unit entity by the IAB authorization instruction that initial context establishes request message carrying described IAB node supports IAB function, and when judging that the DU of IAB node access does not support IAB function, is collected according to the host The auxiliary operation of middle element entity redefines the father node of the IAB node.

22. the described in any item methods in 7,19 and 21 according to claim 1, which is characterized in that according to host's centralized unit The auxiliary operation of entity redefines the father node of the IAB node, comprising:

Receive host's centralized unit entity, after determining that the IAB node initial access process terminates, transmission it is wireless Resource Control Layer release message disconnects the connection with original DU, and redefines the father node of the IAB node；Alternatively,

Referred to according to the switching that host's centralized unit entity is sent after determining that the IAB node initial access process terminates It enables, the father node for supporting IAB function corresponding with the switching command is redefined as to the father node of the IAB node；

Wherein, one of the following is included at least in radio resource control layer release message:

Support the frequency information of IAB；

The cell ID of support IAB function under all public land mobile networks；

Cell Global Identification；

Physical Cell Identifier.

23. the method according to claim 1, wherein further include:

According to the father node more new information that host's centralized unit entity is sent, the father node list locally saved is updated.

24. according to the method for claim 23, which is characterized in that saved according to the father that host's centralized unit entity is sent Point more new information, is updated the father node list locally saved, comprising:

Response message or GNB- are established by radio resource control layer message or F1 according to host's centralized unit entity The parent information for the IAB function change that CU configuration update message or new F1AP message are sent, saves the father being locally stored Point list is updated；Alternatively,

Response message or GNB- are established by radio resource control layer message or F1 according to host's centralized unit entity The father node list of update that CU configuration update message or new F1AP message are sent, to the father node list being locally stored into Row updates.

25. a kind of father node selection method is applied in access management function entity characterized by comprising

Based on the switching of NG interface, the IAB node of the IAB authorization instruction information of IAB node or the IAB node is indicated to send Give the corresponding host's centralized unit entity of target father node or base station.

26. according to the method for claim 25, which is characterized in that by the IAB authorization instruction information of the IAB node or institute The IAB node instruction for stating IAB node is sent to host's centralized unit entity corresponding with target father node or base station, comprising:

By the IAB node instruction of the IAB authorization instruction information of the IAB node or the IAB node, pass through next generation's application association NGAP switching request message or passage path switching request acknowledgement message are discussed, host's collection corresponding with target father node is sent to Middle element entity or base station.

27. a kind of father node selection device is applied to from access return link IAB node characterized by comprising

First father node selecting module is set as the deployment field of the access situation and IAB node access networks network according to IAB node Scape determines the father node of the IAB node.

28. a kind of father node selection device is applied in access management function entity characterized by comprising

Second father node selecting module, is set as the switching based on NG interface, by the IAB authorization instruction information of IAB node or institute The IAB node instruction for stating IAB node is sent to host's centralized unit entity corresponding with target father node or base station.

29. a kind of IAB node characterized by comprising

One or more processors；

Storage device, for storing one or more programs；

When one or more of programs are executed by one or more of processors, so that one or more of processors are real The now father node selection method as described in any in claim 1-24.

30. a kind of access management function entity characterized by comprising

One or more processors；

Storage device, for storing one or more programs；

When one or more of programs are executed by one or more of processors, so that one or more of processors are real The now father node selection method as described in claim 25 or 26.

31. a kind of storage medium, which is characterized in that the storage medium is stored with computer program, the computer program quilt Any father node selection method in claim 1-24 is realized when processor executes, alternatively, realizing such as claim 25 Or father node selection method described in 26.