阅读说明：本技术 改善无线通信系统中的lte/nr交互工作过程的方法和设备 (Improve the method and apparatus of the LTE/NR interworking procedure in wireless communication system ) 是由 徐健 边大旭 金鉐中 于 2018-03-23 设计创作，主要内容包括：提供了在无线通信系统中执行由源辅助节点公开的辅助节点改变过程的方法和设备。主节点从所述源辅助节点接收辅助节点改变请求消息,将辅助节点添加请求消息发送到目标辅助节点,从所述目标辅助节点接收辅助节点添加请求确认消息,并且将辅助节点改变请求消息发送到所述源辅助节点。(It provides and executes the method and apparatus that the auxiliary node as disclosed in the auxiliary node of source changes process in a wireless communication system.Host node receives auxiliary node from the source auxiliary node and changes request message, target auxiliary node is sent by auxiliary node addition request message, auxiliary node is received from the target auxiliary node and adds request confirmation message, and sends the source auxiliary node for auxiliary node change request message.)

1. a kind of executed the side for changing process by the auxiliary node that source auxiliary node is initiated by host node in a wireless communication system Method, method includes the following steps:

The host node receives auxiliary node from the source auxiliary node and changes request message；

The host node sends auxiliary node to target auxiliary node and adds request message；

The host node receives auxiliary node from the target auxiliary node and adds request confirmation message；And

The host node sends auxiliary node to the source auxiliary node and changes request confirmation message.

2. according to the method described in claim 1, wherein, it includes target auxiliary node that the auxiliary node, which changes request message, Identify ID.

3. according to the method described in claim 2, wherein, the ID of the target auxiliary node includes the list of cell ID.

4. according to the method described in claim 3, wherein, being reported based on the source auxiliary node from the received measurement of user equipment (UE) It accuses, the list of cell ID is ranked up.

5. according to the method described in claim 1, wherein, the auxiliary node change request message include in the following terms extremely One item missing: auxiliary node changes the instruction requested, supplementary cell group SCG configuration information, about the neighbouring of the source auxiliary node The measurement report of the cell of node, about the source auxiliary node cell measurement report or about being unloaded to another auxiliary The protocol Data Unit PDU information of the stream of node.

6. according to the method described in claim 1, the method also includes following steps: the host node is saved based on the auxiliary Point changes request message and changes request to decide whether to receive auxiliary node.

7. according to the method described in claim 6, the method also includes following steps: if it is determined that receiving the auxiliary node Change request, then the host node determines the target auxiliary node.

8. according to the method described in claim 1, wherein, the auxiliary node addition request message include SCG configuration information or About at least one of the PDU information of stream that be unloaded to the target auxiliary node.

9. according to the method described in claim 1, wherein, the auxiliary node addition request confirmation message includes in the following terms At least one of: the number of SCG configuration, the list of the PDU session or stream that are received and be rejected or received PDU session or stream According to forwarding address.

10. according to the method described in claim 1, the method also includes following steps: the host node is based on the auxiliary Node adds request confirmation message to decide whether to receive auxiliary node addition request.

11. according to the method described in claim 1, wherein, it includes the following terms that the auxiliary node, which changes request confirmation message, At least one of in: change the instruction of request, the ID of the target auxiliary node, the target about the auxiliary node is received The list of SCG configuration, the PDU session or stream that are received and be rejected from the target auxiliary node of auxiliary node or by The PDU session of receiving or the data forwarding addresses of stream.

12. according to the method described in claim 1, wherein, the host node is in eNodeB, gNB, en-gNB or ng-eNB One, wherein eNodeB is eNB.

13. according to the method described in claim 1, wherein, the source auxiliary node and the target auxiliary node be eNB, One in gNB, en-gNB or ng-eNB.

14. the host node in a kind of wireless communication system, the host node include:

Memory；

Transceiver；And

Processor, the processor are operably linked to the memory and the transceiver, and the processor is used for:

It controls the transceiver and receives auxiliary node change request message from source auxiliary node,

It controls the transceiver and sends auxiliary node addition request message to target auxiliary node,

It controls the transceiver and receives auxiliary node addition request confirmation message from the target auxiliary node, and

It controls the transceiver and sends auxiliary node change request confirmation message to the source auxiliary node.

15. host node according to claim 14, wherein it includes that the target is auxiliary that the auxiliary node, which changes request message, Help the mark ID of node.

Technical field

This disclosure relates to wirelessly communicate, and form a partnership more particularly, to the third generation improved between wireless communication system The method and apparatus of Partnership Program (3GPP) long term evolution (LTE) and new radio access technologies (NR) interworking procedure.

Background technique

Third generation partner program (3GPP) long term evolution (LTE) is to enable to carry out the skill of high speed packet communication Art.It has been directed to LTE target and has proposed many schemes, these schemes include that purpose is to reduce user and supplier's cost, mention High quality-of-service and the scheme for extending and improving coverage area and system capability.3GPP LTE needs the cost of each bit to subtract The power consumption foot of small, service availability increase, frequency band using flexible, simple structure, open interface and the terminal as higher level's needs It is enough.

International Telecommunication Union (ITU) and 3GPP have begun the requirement and specification for setting about formulating new radio (NR) system. NR system can be referred to as another title, for example, new radio access technologies (new RAT).3GPP must determine and develop into Technology component needed for function standardizes NR, to meet the urgent market demand in time and by ITU Radiocommunication Sector (ITU-R) demand for the longer-term that -2020 process of international mobile telecommunication (IMT) proposes.Even if in addition, NR should be able to be used Remoter future can be used at least up to any spectral band of 100GHz of wireless communication.

NR be directed to reply include enhanced mobile broadband (eMBB), large-scale machines type communication (mMTC), it is super can All usage scenarios of (URLLC) etc., the monotechnics frame of requirement and deployment scenario are communicated by low latency.NR should be inherently It is compatible forward.

According to the new architecture for 5G core network and 5G radio access network (RAN) including NR, user equipment (UE) better service can be received in terms of handling capacity and UE experience.In addition, discussing the close interactive work of LTE/NR Make.Due to the close interworking of LTE/NR, cause to allow between eNodeB (eNB) and new RAN node (for example, gNB) into Row interworking, as a result, the handling capacity of UE can be improved.The gNB of the eNB and NR of LTE can manage resource independently.More specifically Ground can be used the close interworking according to LTE/NR to improve double/multi-connection of UE handling capacity, and can simplify and be used for The ambulant signaling of UE.

In NR, in order to provide preferably service to UE, it can be unloaded to auxiliary node by that will carry and improve signaling. Furthermore it is possible to optimize mobile process.For executing the RAN node of the close interworking of LTE/NR, it may be necessary to be used for excellent Change the method for uninstall process.

Summary of the invention

Inventive problem

Present disclose provides third generation Partnership Project (3GPP) long term evolutions improved between wireless communication system (LTE) with the method and apparatus of new radio access technologies (NR) interworking procedure.Present disclose provides pass through as LTE and NR Dual link and the method and apparatus for changing auxiliary node when connecting.

Solution

On the one hand, it provides a kind of host node and executes the auxiliary section initiated by source auxiliary node in a wireless communication system The method of point change process.Change method includes the following steps: the host node receives auxiliary node from the source auxiliary node Become request message；The host node sends auxiliary node to target auxiliary node and adds request message；The host node is from described Target auxiliary node receives auxiliary node and adds request confirmation message；And the host node is auxiliary to source auxiliary node transmission Node is helped to change request confirmation message.

On the other hand, the host node in a kind of wireless communication system is provided.The host node includes memory, transmitting-receiving Device and the processor for being operably linked to the memory and the transceiver.The processor control the transceiver from Source auxiliary node receives auxiliary node and changes request message, controls the transceiver and adds to target auxiliary node transmission auxiliary node Add request message, controls the transceiver from the target auxiliary node and receive auxiliary node addition request confirmation message, and It controls the transceiver and sends auxiliary node change request confirmation message to the source auxiliary node.

Beneficial effect

Auxiliary node can directly start auxiliary node and change process.

Detailed description of the invention

Fig. 1 shows 3GPP LTE system framework.

Fig. 2 shows NG-RAN frameworks.

Fig. 3 shows EN-DC framework.

Fig. 4 shows the option 3/3a/3x of the deployment scenario of the close interworking for LTE/NR.

Fig. 5 shows the option 4/4a of the deployment scenario of the close interworking for LTE/NR.

Fig. 6 shows the option 7/7a/7x of the deployment scenario of the close interworking for LTE/NR.

Fig. 7 shows the auxiliary eNB (SeNB) in LTE and changes process.

Fig. 8, which is shown, changes process by the auxiliary node that auxiliary node is initiated according to the execution of embodiment of the present disclosure Method.

Fig. 9 and Figure 10 shows the auxiliary node initiated according to the execution of another embodiment of the disclosure by auxiliary node The method of change process.

Figure 11, which is shown, to be changed according to the execution of another embodiment of the disclosure by the auxiliary node that auxiliary node is initiated The method of process.

Figure 12, which is shown, to be changed according to the execution of another embodiment of the disclosure by the auxiliary node that auxiliary node is initiated The method of process.

Figure 13, which is shown, to be changed according to the execution of another embodiment of the disclosure by the auxiliary node that auxiliary node is initiated The method of process.

Figure 14 shows the method for execution auxiliary node adding procedure in accordance with one embodiment of the present disclosure.

Figure 15 shows the method for the improved auxiliary node adding procedure of execution in accordance with one embodiment of the present disclosure.

Figure 16 is shown between execution in accordance with one embodiment of the present disclosure improved host node and auxiliary node The method of X2/Xn setting up procedure.

Figure 17 shows the X2/Xn settings between the improved auxiliary node of execution in accordance with one embodiment of the present disclosure The method of process.

Figure 18 shows the wireless communication system for realizing embodiment of the present disclosure.

Figure 19 shows the wireless communication system for realizing embodiment of the present disclosure.

Specific embodiment

Hereinafter, in the disclosure, it mainly describes based on third generation partner program (3GPP) or electric and electronic The wireless communication system of Association of Engineers (IEEE).However, the present disclosure is not limited thereto, and the disclosure can be applied to have and incite somebody to action The other wireless communication systems for the identical characteristic being described below.

Fig. 1 shows 3GPP LTE system framework.Referring to Fig.1,3GPP long term evolution (LTE) system architecture includes one or more Multiple user equipment (UE；10), Evolved UMTS Terrestrial radio access network (E-UTRAN) and Evolved Packet Core (EPC).UE 10 refers to the communication equipment that user carries.What UE 10 can be fixed or move, and can be referred to as all Another term as movement station (MS), user terminal (UT), subscriber station (SS), wireless device etc..

E-UTRAN includes one or more evolved node B (eNB) 20, and multiple UE can be located at it is one small Qu Zhong.ENB 20 provides the endpoint of control plane and user plane to UE 10.ENB 20 is usually the fixation communicated with UE 10 It stands and another term as base station (BS), access point etc. can be referred to as.It can one eNB of each cell deployment 20。

EPC includes mobility management entity (MME) and gateway (S-GW).MME/S-GW 30 provides meeting for UE 10 The endpoint of words and mobile management function to ps domain.For convenience's sake, MME/S-GW 30 will be called herein " gateway " for short, but It is it is appreciated that the entity includes both MME and S-GW.Packet data network (PDN) gateway (P-GW) may be coupled to extranets Network.

MME provides various functions, Non-Access Stratum (NAS) signaling, NAS signaling safety, access layer including leading to eNB 20 (AS) security control, for 3GPP access network between ambulant core network (CN) intermediate node signaling, (including paging weight The control that newly sends and execution) idle mode UE accessibility, (for the UE's under idle and activation pattern) tracking area list Management, packet data network (PDN) gateway (P-GW) and S-GW selection change the MME selection switched over MME, for cutting Serving GPRS Support Node (SGSN) selection, roaming, certification including the dedicated bearer for shifting to 2G or 3G 3GPP access network are built Vertical bearer management function, for (including earthquake and tsunami warning system (ETWS) and business mobile warning system (CMAS)) The support that public pre-warning system (PWS) message is sent.The miscellaneous function of S-GW host offer, including (such as pass through depth Packet inspection) packet filtering based on each user, lawful intercept, the distribution of the UE Internet protocol address (IP), the biography in DL Defeated grade packet marking, the charging of UL and DL seeervice level, gating and rate execute, are based on access point name aggregate maximum bit rate (APN-AMBR) DL rate executes.

It can be used for sending customer service or controlling the interface of business.UE 10 is connected to eNB20 via Uu interface. ENB 20 is connected to each other via X2 interface.Neighbouring eNB can have the mesh network structure containing X2 interface.ENB 20 is via S1 Interface is connected to gateway 30.

5G system is the 3GPP system for including 5G access network (AN), 5G core network (CN) and UE.5G accesses network New generation of wireless including being connected to 5G core network is electrically accessed the access net of network (NG-RAN) and/or non-3GPP access network Network.NG-RAN is one or more wireless in the following option when it is connected to 5G core network with common features Network is electrically accessed,

1) independent new radio (NR).

2) NR is the anchor point that there is E-UTRA to extend.

3) independent E-UTRA.

4) E-UTRA is the anchor point that there is NR to extend.

Fig. 2 shows NG-RAN frameworks.Referring to Fig. 2, NG-RAN includes at least one NG-RAN node.NG-RAN node includes At least one gNB and/or at least one ng-eNB.GNB provides NR user plane and control plane protocol terminations to UE.ng-eNB E-UTRA user plane and control plane protocol terminations are provided to UE.GNB and NG-eNB is interconnected amongst one another by Xn interface.GNB and Ng-eNB is also connected to 5G CN by NG interface.More specifically, gNB and ng-eNB is connected to access and shifting by NG-C interface Mobility management function (AMF), and user-plane function (UPF) is connected to by NG-U interface.

GNB and ng-eNB carries following functions:

Radio resource management: radio bearer control, radio admission control connect mobility control, in uplink Dynamic resource allocation (scheduling) is carried out to UE in link and downlink the two；

Internet protocol (IP) header-compressed, data encryption and integrity protection；

The information as provided by UE is determined selects AMF when not being routed to AMP when UE is attached；

User plane data is routed towards UPF；

Control plane information is routed towards AMF；

Connection setting and release；

Scheduling and transmission paging message；

Scheduling and transmission system broadcast information (being originated from AMF or operation and maintenance (O&M))；

It is used for the measurement and measurement report configuration of mobility and scheduling；

Transport level packet marking in uplink；

Session management；

Support network slice；

QoS flow management and be mapped to data radio carrying；

Support the UE for being in RRC_INACTIVE state；

For the distribution function of non-assessment layer (NAS) message；

Radio access network is shared；

Dual link；

Close interworking between-NR and E-UTRA.

AMF carries following major function:

NAS signaling terminates；

NAS signaling safety；

- AS security control；

For ambulant CN intermediate node signaling between 3GPP access network；

Idle mode UE accessibility (including control and execute paging and retransmit)；

Registration area managing；

Mobility in the system of support between system；

Access authentication；

Insertion authority including roaming authority inspection；

Mobile management control (is subscribed to and tactful)；

Support network slice；

Conversation management functional (SMF) selection.

UPF carries following major function:

It is used for the intra/inter- access technology of radio (RAT) ambulant anchor point (where applicable)；

With external protocol data cell (PDU) session point of data network interconnection；

Grouping routing and forwarding；

The packet inspection and user plane portion that policing rule executes；

Flow uses report；

Support the Uplink classifier that traffic flow is routed to data network；

Support the branch point of more host PDU sessions；

QoS processing to user plane, for example, packet filtering, gate, UL/DL rate execute；

Uplink traffic verifying (server data stream (SDF)-QoS flow mapping)；

Downlink packets buffering and down link data notification triggers.

SMF carries following major function:

Session management；

The distribution of-UE IP address and management；

Selection and control UP function；

The flow direction for configuring UPF turns to, to route traffic to correct destination；

Control policy executes and the part of QoS；

Down link data notice.

Hereinafter, more RAT dual links will be described.NG-RAN supports more RAT dual links, more RAT dual links to be configured such that The radio provided by two independent schedulers can be used in UE in the RRC_CONNECTED state with multiple RX/TX Resource.More RAT dual links are the extensive of E-UTRA dual link.Two individual schedulers are located to be connected each other by non-ideal backhaul At the two difference NG-RAN nodes connect.One in two difference NG-RAN nodes is played the role of host node (MN), and another One is played the role of auxiliary node (SN).In other words, a scheduler is located at MN, and another scheduler is located at SN. Two difference NG-RAN nodes provide E-UTRA connection (when NG-RAN node is ng-eNB) or NR connection (when NG-RAN node When being gNB).Ng-eNB is to provide NR user plane to UE and control the node of plane protocol terminations, and in E-UTRAN-NR It is operated in dual link (EN-DC) as SN.GNB is to provide E-UTRA user plane to UE and control the section of plane protocol terminations Point, and 5G CN is connected to by NG interface.MN and SN are connected to each other by network interface, and at least MN is connected to core Network.Although based on more RAT dual links in the disclosure of the non-ideal backhaul design between different nodes, more RAT are bis- Connection can be used for ideal backhaul.

Fig. 3 shows EN-DC framework.E-UTRAN supports more RAT dual links by EN-DC, wherein UE is connected to conduct One eNB of the MN operation and en-gNB operated as SN.ENB is connected to EPC by S1 interface and passes through X2 interface It is connected to en-gNB.En-eNB can be connected to EPC by S1-U interface and be connected to different en- by X2-U interface gNB。

5G CN also supports more RAT dual links.NG-RAN supports NG-RAN E-UTRA-NR dual link (NGEN-DC), In, UE is connected to a ng-eNB as a MN operation and gNB as SN operation.Ng-eNB is connected to 5G CN, and GNB is connected to ng-eNB by Xn interface.In addition, NG-RAN supports NR-E-UTRA dual link (NE-DC), wherein UE is connected to A gNB as a MN operation and ng-eNB as SN operation.GNB is connected to 5G CN, and ng-eNB is connect by Xn Mouth is connected to gNB.

In order to support the more RAT dual links and/or close interworking of above-mentioned LTE/NR, it may be considered that be used for The various scene sets of LTE and NR.

Fig. 4 shows the option 3/3a/3x of the deployment scenario of the close interworking for LTE/NR.(a) of Fig. 4 can be with Referred to as option 3, (b) of Fig. 4 can be referred to as option 3a, and (c) of Fig. 4 can be referred to as option 3x.In option 3/3a/ In 3x, LTE eNB is connected to EPC together with dependent NR.In other words, NR controls plane and is not directly connected to EPC, but It is connected by LTE eNB.NR user plane is connected to EPC (option 3) via LTE eNB or directly connects via S-1U interface (option 3a).Alternatively, being split into the LTE eNB (option 3x) in gNB by the user plane that S1-U interface is directly connected to.Choosing Item 3/3a/3x corresponds to the EN-DC framework referring to Fig. 3 detailed description.

Fig. 5 shows the option 4/4a of the deployment scenario of the close interworking for LTE/NR.(a) of Fig. 5 can be by Referred to as option 4, and (b) of Fig. 5 can be referred to as option 4a.In option 4/4a, gNB is connected together with dependent E-UTRA To NGC.In other words, E-UTRA controls plane and is not directly connected to NGC, but passes through gNB connection.In other words, E- UTRA user plane is connected to NGC (option 4) via gNB or directly connects (option 4a) by NG-U interface.4/4a pairs of option Should be in option 3/3a, wherein E-UTRA and NR is exchanged.

Fig. 6 shows the option 7/7a/7x of the deployment scenario of the close interworking for LTE/NR.(a) of Fig. 6 can be with Referred to as option 7, (b) of Fig. 6 can be referred to as option 7a, and (c) of Fig. 6 can be referred to as option 7x.In option 7/7a/ In 7x, eLTE eNB (that is, ng-eNB) is connected to NGC together with dependent NR.In other words, NR controls plane and does not connect directly It is connected to NGC, but is connected by eLTE eNB.NR user plane is connected to NGC (option 7) via eLTE eNB or directly passes through NG-U interface connects (option 7a).Alternatively, being given to the LTE eNB in gNB by the user plane that NG-U interface is directly connected to (option 7x).

Fig. 7 shows the auxiliary eNB (SeNB) in LTE and changes process.SeNB is initiated by main eNB (MeNB) and changes process. SeNB changes process for UE context to be transmitted to target SeNB from source SeNB and matches the supplementary cell group (SCG) in UE Setting from a SeNB becomes another.The signaling flow for changing process for SeNB is described below.

1/2.MeNB is sent out by request target SeNB (T-SeNB) by the way that SeNB addition preparation process is UE distribution resource It plays SeNB and changes process.The SCG configuration of old SeNB is included in SeNB addition request message by MeNB.If necessary to forward, then T-SeNB provides forwarding address to MeNB.

3. if MeNB is initiated to UE and S-SeNB release S-SeNB resource be successfully assigned with T-SeNB resource.If It is configured with first to have no progeny and connects (Make-Before-Break) SeNB change, then S-SeNB determines when to stop transmitting to UE.If needed Data are forwarded, then data forwarding addresses are supplied to S-SeNB by MeNB.Immediate data forwarding or indirect data forwarding are used for SCG carrying.Only indirect data forwarding be used to separate carrying.SeNB release request message reception trigger S-SeNB stop to UE provides user data and starts to forward data in where applicable.

4/5.MeNB triggers the new configuration of UE application.MeNB indicates RRCConnectionReconfiguration message to UE In new configuration.Configuration (part) included in RRCConnectionReconfiguration message cannot be followed in UE In the case where, UE execution reconfigures failure procedure.

SeNB change is connect if being configured with and first having no progeny, is being received including MobilityControlInforSCG's UE executes initial uplink (UL) for Target cell and sends it after RRCConnectionReconfiguration message Before, it is always maintained at the connection with S-SeNB.

6. if MeNB informs T-SeNB RRC connection reconfiguration sets process success.

7.UE executes synchronous with T-SeNB's.

If applicable, then it executes from S-SeNB and forwards data.This can receive SeNB release from MeNB early in S-SeNB It is initiated when request message.

8-10. if triggering path more by MeNB with one of SCG carrying option configuration bearer context in S-SeNB Newly.

11. S-SeNB can discharge the radio and C with UE context relation when receiving UE context release message Plane related resource.Furthermore it is possible to continue any ongoing data forwarding.

Fig. 7 discloses the SeNB in LTE and changes the problem of process is only triggered by MeNB.From the perspective of process, this is Inefficient.In addition, in the EN-DC or MR-DC of the interworking progress due to LTE/NR, it may be necessary to belong to independent RAT's Each node can initiate SeNB and change process.

In order to solve problem above, EN-DC or MR- is directed to the present disclosure proposes the interworking progress due to LTE/NR The auxiliary node of DC changes process, the interworking be by auxiliary node and non-master is initiated.In following embodiment In, host node and auxiliary node can be any of the network node of LTE or NR.For example, host node can be eNB, gNB Any of with ng-eNB, and auxiliary node is also possible to any of eNB, gNB, en-gNB and ng-eNB.

1. embodiment 1-1

Fig. 8, which is shown, changes process by the auxiliary node that auxiliary node is initiated according to the execution of embodiment of the present disclosure Method.In fig. 8, MN indicates host node, and S-SN indicates source auxiliary node, and T-SN indicates target auxiliary node.

In the step s 100, source auxiliary node receives the measurement report about adjacent node from UE.Source auxiliary node determines The service of UE is unloaded to one of its adjacent node.

In step s 102, auxiliary node change request message is sent host node by source auxiliary node.Auxiliary node changes Becoming request message may include at least one of the following.

(1) auxiliary node changes the instruction of request

(2) SCG configuration information

(3) about the adjacent node of source auxiliary node and/or the measurement report of source auxiliary node either own cell

(4) mark (ID) of target auxiliary node: it can recommend/determine target to assist based on the decision of source auxiliary node The ID of node.The ID of the auxiliary node of target can be realized by the list of cell ID.It is one small to can correspond to node for cell Area.Cell ID List can be ranked up based on the measurement report about radio quality.The list of cell ID can by from It is high to Low or sort from low to high.In this way, host node can make a choice the decision of appropriate target auxiliary node.

(5) about the PDU information for the stream that be unloaded to another node

When receiving auxiliary node change request message from source auxiliary node, host node decides whether to receive auxiliary node Change request.If host node decision receives auxiliary node and changes request, host node can also determine target auxiliary node.In In step S104, auxiliary node addition request message is sent target auxiliary node by host node.Auxiliary node addition request disappears Breath may include at least one of the following.

(1) SCG configuration information

(2) the PDU information about the stream of target auxiliary node to be unloaded to

When receiving auxiliary node addition request message from host node, target auxiliary node decides whether to receive auxiliary section Point addition request.Target auxiliary node can be based on auxiliary via the received information of auxiliary node addition request message and/or target The radio resource situation of node is helped to decide whether to receive auxiliary node addition request.

If the decision of target auxiliary node receives auxiliary node addition request, in step s 106, target auxiliary node Auxiliary node, which is sent, to host node adds request confirmation message.It may include in following that auxiliary node, which adds request confirmation message, At least one.

(1) SCG is configured

(2) the PDU session/stream list for being received and being rejected

(3) data forwarding addresses of received PDU session/stream

If target auxiliary node determines refusal auxiliary node addition request, target auxiliary node can be by auxiliary node Addition refuse information is sent to host node, this is not disclosed in fig. 8.Auxiliary node addition refuse information may include refusal Reason, for example, without radio resource.

When receiving auxiliary node addition request confirmation message from target auxiliary node, host node decides whether to assist Node changes into target auxiliary node from source auxiliary node.If host node decision changes into auxiliary node from source auxiliary node Target auxiliary node, then in step S108, auxiliary node change confirmation message is sent source auxiliary node by host node.Auxiliary It may include at least one of the following that node, which changes confirmation message,.

(1) change about auxiliary node and request received instruction

(2) ID of target auxiliary node

(3) the SCG configuration of target auxiliary node

(4) PDU session/stream list of receiving and refusal from target auxiliary node

(5) data forwarding addresses of received PDU session/stream

In step s 110, RRCConnectionReconfiguration message is sent UE by host node. RRCConnectionReconfiguration message may include the RRC configuration information and/or target auxiliary node of host node RRC configuration information.When receiving RRCConnectionReconfiguration message from host node, in step S112 In, RRCConnectionReconfigurationComplete message is sent host node by UE.If UE cannot be followed Included configuration (part) in RRCConnectionReconfiguration message, then UE, which can be executed, reconfigures mistake Lose process.

If RRC connection reconfiguration procedure success, in step S114, host node by matching auxiliary node again It sets and completes message sending target auxiliary node to inform target auxiliary node.

In step S116, UE is synchronized to target auxiliary node by executing random access procedure.

In step S118 into S122, if one of context is at the auxiliary node of source configured with SCG option/SCG separation Option then can trigger routing update by host node.

In step S124, UE context release message is sent source auxiliary node by host node.Receiving UE or more When literary release message, source auxiliary node can discharge and the radio of UE context relation and C plane related resource.It can continue to appoint What ongoing data forwarding.

Fig. 9 and Figure 10 shows the auxiliary node initiated according to the execution of another embodiment of the disclosure by auxiliary node The method of change process.In this embodiment it is assumed that being EN-DC framework described in Fig. 3.That is, false in this embodiment Determine that host node is eNB and source/target auxiliary node is en-gNB.In figure 9 and in figure 10, MN indicates that host node, S-SN indicate Source auxiliary node, and T-SN indicates target auxiliary node.

Firstly, description Fig. 9.

In step S202, source auxiliary node is by sending out SgNB Change Required (SgNB, which changes, to be required) message Host node is sent to initiate auxiliary node and change process.Step S202 can correspond to the step S102 in Fig. 8.SgNB Change Required message may include target auxiliary node id information.SgNB Change Required message can wrap Include SCG configuration (for supporting residual quantity to configure) and measurement result relevant to target auxiliary node.

Table 1 shows the example of SgNB Change Required message.En-gNB sends this message to MeNB, to ask It asks and changes en-gNB for particular UE.

[table 1]

Referring to table 1, SgNB Change Required message includes " Target SgNB ID Information (target SgNB id information) " information element (IE).Target SgNB ID Information IE can correspond to Fig. 8 the step of The ID of target auxiliary node disclosed in S102.Table 2 shows the example of Target SgNB ID Information IE.It should IE includes the target SgNB ID for being used to find target en-gNB by MeNB.

[table 2]

In step S204, by sending SgNB Addition Request to target auxiliary node, (SgNB adds host node Add request) message come request target auxiliary node be UE distribute resource.Step S204 can correspond to the step S104 in Fig. 8. SgNB Addition Request message may include tying to from the relevant measurement of the received target auxiliary node of source auxiliary node Fruit.Table 3 shows the example of SgNB Addition Request message.MeNB sends this message to en-gNB, is with request Particular UE prepares the resource for EN-DC operation.

[table 3]

In step S206, SgNB addition request confirmation message is sent host node by target auxiliary node.Step S206 It can correspond to the step S106 in Fig. 8.If necessary to forward, then target auxiliary node can add request confirmation in SgNB and disappear Forwarding address is provided to host node in breath.Table 4 shows SgNB Addition Request Acknowledge (SgNB addition Request confirmation) message example.En-gNB sends the message, to confirm the MeNB prepared about SgNB addition.

[table 4]

In step S208, host node triggers the new configuration of UE application.Host node is including being generated by target auxiliary node NR RRC is configured in the RRCConnectionReconfiguration message of message and is indicated new configuration to UE.Step S208 can be with Corresponding to the step S110 in Fig. 8.In step S210, the new configuration of UE application, and send RRCConnectionReconfi GurationComplete message.RRCConnectionReconfigurationComplete message may include for target The NR RRC response message of the coding of auxiliary node.Step S210 can correspond to the step S112 in Fig. 8.If UE cannot be abided by Configuration (part) included in RRCConnectionReconfiguration message is followed, then UE execution reconfigures failure Process.

If being successfully assigned with target auxiliary node resource, in step S212, host node is by source auxiliary node SgNB Change Confirm (SgNB changes confirmation) message is sent to confirm the release of source auxiliary node resource.Step S212 It can correspond to the step S108 in Fig. 8.If necessary to forward data, then host node can be in SgNB Change Confirm Data forwarding addresses are provided to source SN in message.The reception of SgNB Change Confirm message triggers source auxiliary node and stops User data only is provided to UE, and in where applicable, starts to forward data.

If RRC connection reconfiguration procedure success, in step S214, host node is via SgNB Reconfiguration Complete (SgNB reconfigures completion) message and the NR RRC encoded for target auxiliary node Response message informs target auxiliary node.Step S214 can correspond to the step S114 in Fig. 8.

In step S216, UE is synchronized to target auxiliary node.Step S216 can correspond to the step S116 in Fig. 8.

Now, Figure 10 is described.The process in Figure 10 is executed after process in Fig. 9.

In step S218 and S220, in where applicable, occur to forward data from source auxiliary node.This can be assisted early in source Node is initiated when receiving SgNB Change Confirm message from host node.

In step S222, Secondary RAT Data Volume Report (is assisted RAT data by source auxiliary node Amount report) message is sent to host node, and including for correlation E-UTRAN radio access bearer (E-RAB) pass through NR without Line electrically communicate to the data volume of UE.

In step S224 into S232, if one of carrying terminates at the auxiliary node of source, path is triggered by host node It updates.Step S224 to S232 can correspond to the step S118 to S122 in Fig. 8.

In step S234, when receiving UE context release message, source auxiliary node can discharge and UE context Associated radio and C plane related resource.It can continue any ongoing data forwarding.Step S234 can correspond to figure Step S124 in 8.

Figure 11, which is shown, to be changed according to the execution of another embodiment of the disclosure by the auxiliary node that auxiliary node is initiated The method of process.Embodiment described in Fig. 8 to Figure 10 can be applied to the embodiment.In this embodiment, main section Point can be one in eNB, gNB, en-gNB or ng-eNB, and source auxiliary node and target auxiliary node are also possible to One in eNB, gNB, en-gNB or ng-eNB.

In step s 302, host node receives auxiliary node change request message from source auxiliary node.Step S302 can be with Corresponding to the step S102 in Fig. 8.Auxiliary node changes the ID that request message may include target auxiliary node.Target auxiliary section The ID of point may include the list of cell ID.Based on source auxiliary node from the received measurement report of UE, to the list of cell ID into Row sequence.In addition, it includes at least one of the following that auxiliary node, which changes request message: auxiliary node changes the finger of request Show, SCG configuration information, about source auxiliary node adjacent node cell measurement report, about the cell of source auxiliary node Measurement report or PDU information about the stream that be unloaded to other auxiliary nodes.

Host node can change request message based on auxiliary node and change request to decide whether to receive auxiliary node.If Decision receives auxiliary node and changes request, then host node can determine target auxiliary node.

In step s 304, host node sends auxiliary node to target auxiliary node and adds request message.Step S304 can With the step S104 corresponded in Fig. 8.Auxiliary node addition request message may include SCG configuration information or about being unloaded to At least one of PDU information of the stream of target auxiliary node.

In step S306, host node receives auxiliary node from target auxiliary node and adds request confirmation message.Step S306 can correspond to the step S106 in Fig. 8.Auxiliary node addition request confirmation message may include in the following terms extremely One item missing: the data of SCG configuration, the list of the PDU session or stream that are received and be rejected or received PDU session or stream turn Send out address.

Host node can add request confirmation message based on auxiliary node to decide whether to receive auxiliary node addition request.

In step S308, host node sends auxiliary node to source auxiliary node and changes request confirmation message.Auxiliary node Changing request confirmation message may include at least one of the following: changing about auxiliary node and requests received finger Show, the SCG of the ID of target auxiliary node, target auxiliary node is configured, the PDU meeting of the receiving from target auxiliary node and refusal The PDU session of list or the receiving of words or the data forwarding addresses of stream.

1-2. embodiment 1-2

Figure 12, which is shown, to be changed according to the execution of another embodiment of the disclosure by the auxiliary node that auxiliary node is initiated The method of process.In Figure 12, MN indicates host node, and S-SN indicates source auxiliary node, and T-SN indicates target auxiliary node.

In step S400, source auxiliary node is received from host node about roaming by initial auxiliary node adding procedure Information, access restriction information (switching limitation list (HRL)), subscriber-related information and/or RAN shared information are (for example, public land Ground mobile network (PLMN) information).In addition, source auxiliary node can obtain the peace that will be used by another auxiliary node from host node Full key information.Another auxiliary node can be can be from the potential node for changing (or switching) of source auxiliary node.

In step S402, source auxiliary node receives the measurement report about adjacent node from UE.Source auxiliary node determines UE service is unloaded to one of adjacent node.Source auxiliary node can be determined based on the measurement report about adjacent node by UE Service is unloaded to one of adjacent node.In addition, source auxiliary node can be based on the letter about roaming received in step S400 UE service is unloaded to one of adjacent node to determine by breath, access restriction information, subscriber-related information and/or RAN shared information.

In step s 404, service unloading request message is sent target auxiliary node by source auxiliary node.Service unloading Request message is similar to the auxiliary node described in the step S104 of Fig. 8 and adds request message.Service unloading request message can To include at least one of following information.

(1) SCG configuration information

(2) instruction that auxiliary node changes

(3) host node ID: host node ID can be used to determine whether to receive service unloading request in target auxiliary node.More Specifically, whether same host node is belonged to according to source auxiliary node and target auxiliary node, target auxiliary node can be used Host node ID requests to determine whether to receive service unloading.

(4) the PDU information for the stream to be unloaded

(5) for it is following it is ambulant about the information of roaming, access restriction information (HRL), subscriber-related information and/or RAN shared information (for example, PLMN information)

(6) in advance from the received secure cryptographic key information of host node

The target auxiliary node that auxiliary node has received service unloading request message from source determines whether that receiving service unloads Carry request.Target auxiliary node can be based on passing through the service received information of unloading request message and/or target auxiliary node Radio resource situation is requested to determine whether to receive service unloading.

If target auxiliary node receives service unloading request, in step S406, target auxiliary node unloads service It carries request confirmation message and is sent to source auxiliary node.Service unloading request confirmation message is similar to retouches in the step S106 of Fig. 8 The auxiliary node addition request confirmation message stated.Service unloading request confirmation message may include at least one in following information It is a.

(1) SCG is configured

(2) list of received PDU session/stream and the PDU session/stream list being rejected,

(3) data forwarding addresses of received PDU session/stream

If service can be unloaded request refusal by the refusal service unloading request of target auxiliary node, target auxiliary node Message is sent to source auxiliary node.The auxiliary node that service unloading request refuse information is similar to reference Fig. 8 description adds request Refuse information.However, service unloading request refuse information is not shown in Figure 12.Service unloads request refuse information The reason of refusal, for example, lacking radio resource or not belonging to same host node.

It, will from the source auxiliary node that targeted secondary node receives service unloading request confirmation message in step S408 Auxiliary node release request message is sent to host node.Auxiliary node release request message may include in following information at least One.

(1) purpose of advertisement message is to change the instruction of auxiliary node

(2) ID of target auxiliary node

(3) the SGC configuration of target auxiliary node

(4) PDU session/stream list that target auxiliary node receives and refuses

The host node that auxiliary node has received auxiliary node release request message from source determines whether to receive auxiliary node Release request.If host node receives auxiliary node release request, in step S410, host node wants auxiliary node release Confirmation message is asked to be sent to source auxiliary node.In addition, host node can distribute new security key, make for target auxiliary node With.Auxiliary node release request confirmation message may include at least one of following information.

(1) receive the instruction of auxiliary node change

It (2) include the letter about the type change of corresponding PDU/ stream if host node wants the specific PDU/ stream of retrieval Breath (that is, which carrying/stream returns to host node).

(3) the new security key that will be used by target auxiliary node

If auxiliary node release request confirmation message includes the new security key that target auxiliary node will use, in step In rapid S410a, new security key is sent out from the source auxiliary node that host node receives auxiliary node release request confirmation message It is sent to target auxiliary node.The new security key can be used to ensure the safety of data transmission by target auxiliary node.

In step S412, RRCConnectionReconfiguration message is sent UE by host node. RRCConnectionReconfiguration message may include the RRC configuration information and/or target auxiliary node of host node RRC configuration information.In step S414, the UE of RRCConnectionReconfiguration message is had received by RRC ConnectionReconfigurationComplete message is sent to host node.It cannot be followed in UE In RRCConnectionReconfiguration message in the case where included configuration (part), UE execution is reconfigured Failure procedure.

If RRC connection reconfiguration procedure success, in step S416, process is successfully completed informing mesh by host node Mark auxiliary node.

In step S418, UE executes synchronous with target auxiliary node.

Hereafter, the operation described in the step S118 to S124 of Fig. 8 can be executed.

1-3. embodiment 1-3

Figure 13, which is shown, to be changed according to the execution of another embodiment of the disclosure by the auxiliary node that auxiliary node is initiated The method of process.In Figure 13, MN indicates host node, and S-SN indicates source auxiliary node, and T-SN indicates target auxiliary node.

In step S500, source auxiliary node is received from host node about roaming by initial auxiliary node adding procedure Information, access restriction information (HRL), subscriber-related information and/or RAN shared information (for example, PLMN information).In addition, source is auxiliary Help node that can obtain the secure cryptographic key information that will be used by another auxiliary node from host node.Another auxiliary node can be can With from the potential node for changing (or switching) of source auxiliary node.

In step S502, source auxiliary node receives the measurement report about adjacent node from UE.Source auxiliary node determines UE service is unloaded to one of adjacent node.Source auxiliary node can be determined based on the measurement report about adjacent node by UE Service is unloaded to one of adjacent node.In addition, source auxiliary node can be based on the letter about roaming received in step S500 UE service is unloaded to one of adjacent node to determine by breath, access restriction information, subscriber-related information and/or RAN shared information.

In step S504, service unloading request message is sent target auxiliary node by source auxiliary node.Service unloading Request message is similar to the auxiliary node described in the step S104 of Fig. 8 and adds request message.Service unloading request message can To include at least one of following information.

(1) SCG configuration information

(2) instruction that auxiliary node changes

(3) host node ID: host node ID can be used to determine whether to receive service unloading request in target auxiliary node.More Specifically, whether same host node is belonged to according to source auxiliary node and target auxiliary node, target auxiliary node can be used Host node ID requests to determine whether to receive service unloading.

(4) the PDU information for the stream to be unloaded

(5) for it is following it is ambulant about the information of roaming, access restriction information (HRL), subscriber-related information and/or RAN shared information (for example, PLMN information)

(6) in advance from the received secure cryptographic key information of host node

The target auxiliary node that auxiliary node has received service unloading request message from source determines whether that receiving service unloads Carry request.Target auxiliary node can be based on passing through the service received information of unloading request message and/or target auxiliary node Radio resource situation is requested to determine whether to receive service unloading.

If target auxiliary node receives service unloading request, in step S506, target auxiliary node unloads service It carries request confirmation message and is sent to source auxiliary node.Service unloading request confirmation message is similar to retouches in the step S106 of Fig. 8 The auxiliary node addition request confirmation message stated.Service unloading request confirmation message may include at least one in following information It is a:

(1) SCG is configured

(2) list of received PDU session/stream and the PDU session/stream list being rejected,

(3) data forwarding addresses of received PDU session/stream

If service can be unloaded request refusal by the refusal service unloading request of target auxiliary node, target auxiliary node Message is sent to source auxiliary node.The auxiliary node that service unloading request refuse information is similar to reference Fig. 8 description adds request Refuse information.However, service unloading request refuse information is not shown in Figure 13.Service unloads request refuse information The reason of refusal, for example, lacking radio resource or not belonging to same host node.

It, will from the source auxiliary node that target auxiliary node receives service unloading request confirmation message in step S508 Auxiliary node changes request message and is sent to host node.Auxiliary node change request message may include in following information at least One.

(1) purpose of advertisement message is to change the instruction of auxiliary node

(2) ID of target auxiliary node

(3) the SGC configuration of target auxiliary node

(4) PDU session/stream list that target auxiliary node receives and refuses

The host node that auxiliary node has received auxiliary node change request message from source determines whether to receive auxiliary node Change request.If host node receives auxiliary node and changes request, in step S510, host node asks auxiliary node change Confirmation message is asked to be sent to source auxiliary node.In addition, host node can distribute new security key, make for target auxiliary node With.It may include at least one of following information that auxiliary node, which changes request confirmation message,.

(1) receive the instruction of auxiliary node change

It (2) include the letter about the type change of corresponding PDU/ stream if host node wants the specific PDU/ stream of retrieval Breath (that is, which carrying/stream returns to host node).

(3) the new security key that will be used by target auxiliary node

If it includes the new security key that target auxiliary node will use that auxiliary node, which changes request confirmation message, in step In rapid S510a, new security key is sent out from the source auxiliary node that host node receives auxiliary node change request confirmation message It is sent to target auxiliary node.The new security key can be used to ensure the safety of data transmission by target auxiliary node.

In step S512, RRCConnectionReconfiguration message is sent UE by host node. RRCConnectionReconfiguration message may include the RRC configuration information and/or target auxiliary node of host node RRC configuration information.In step S514, the UE of RRCConnectionReconfiguration message is had received by RRC ConnectionReconfigurationComplete message is sent to host node.It cannot be followed in UE In RRCConnectionReconfiguration message in the case where included configuration (part), UE execution is reconfigured Failure procedure.

If RRC connection reconfiguration procedure success, in step S516, process is successfully completed informing mesh by host node Mark auxiliary node.

In step S518, UE executes synchronous with target auxiliary node.

Hereafter, the operation described in the step S118 to S124 of Fig. 8 can be executed.

According to embodiment of the present disclosure, auxiliary node, which can be serviced, is directly unloaded to another auxiliary node.Therefore, UE can receive service under the conditions of more optimized.Furthermore it is possible to improve the benefit of the radio resource of host node and auxiliary node With.

In addition, RRCConnectionReconfigurationComplete message is total in conventional SeNB adding procedure It is to be sent to auxiliary node via host node.This can be to confirm in from the graph 7.If MeNB executes SeNB to T-SeNB and added Cheng Zuowei SeNB changes the part of process, then RRCConnectionReconfigurationComplete message is sent out via MeNB It is sent to T-SeNB.The operation will cause the unnecessary delay of auxiliary node.

In order to solve problem above, the present disclosure proposes one kind method used in auxiliary node adding procedure, pass through This method, UE directly send auxiliary node for RRCConnectionReconfigurationComplete message.Below Embodiment in, host node and auxiliary node can be any of the network node of LTE or NR.For example, host node can To be any of eNB, gNB, en-gNB and ng-eNB, and auxiliary node is also possible to eNB, gNB, en-gNB and ng-gNB Any of.

2. embodiment 2

Figure 14 shows the method for execution auxiliary node adding procedure in accordance with one embodiment of the present disclosure.This implementation Mode can be applied to the initial addition of auxiliary node.

If host node determines addition auxiliary node to provide service for particular UE, in step S602, host node will Auxiliary node addition request message is sent to auxiliary node.It may include SCG configuration information that auxiliary node, which adds request message,.

The cell for being directed to auxiliary node is determined from the auxiliary node that host node receives auxiliary node addition request message SCG configuration.In step s 604, auxiliary node addition request confirmation message is sent host node by auxiliary node.Auxiliary node Addition request confirmation message includes identified SCG configuration.

The host node received from the host node inspection that auxiliary node receives auxiliary node addition request confirmation message Parameter and UE ability.In step S606, RRCConnectionReconfiguration message is sent UE by host node. RRCConnectionReconfiguration message includes the final argument from host node and auxiliary node.

Received from host node the UE of RRCConnectionReconfiguration message to auxiliary node initiate with Machine access procedure.In step S608, random access lead code is sent auxiliary node by UE, and in step S610, UE From auxiliary node receiving random access response.

In step S612, UE directly transmits RRCConnectionReconf via SCG signaling radio bearer (SRB) IgurationComplete message.Therefore, for the successful random access procedure of auxiliary node can be directed to auxiliary node What the RRC connection of addition reconfigured successfully complete occurs together.

In step S614, the auxiliary of RRCConnectionReconfigurationComplete message is received from UE Help node that host node is informed in the completion reconfigured for the RRC connection of auxiliary node.If RRCConnectionRecon FigurationComplete message includes the information about host node, then corresponding information can also be sent to host node.

It can from the host node that auxiliary node receives RRCConnectionReconfigurationComplete message To start to send data grouping to auxiliary node or initiate data forwarding process.

According to embodiment of the present disclosure, the available RRCConnectionReconfigurationCom of auxiliary node Plete message, and be ready for resource allocation and data transmission rapidly.In addition, working as RRCConnectionReconfigu When rationComplete message is sent to host node, host node can start to send data grouping or initiation to auxiliary node Data forwarding process.

In addition, in addition the disclosure proposes the side for more efficiently supporting the auxiliary node initiated by auxiliary node to change process Method.In following embodiment, host node and auxiliary node can be any of the network node of LTE or NR.For example, Host node can be any of eNB, gNB, en-gNB and ng-eNB, and auxiliary node is also possible to eNB, gNB, en-gNB Any of with ng-gNB.

3-1. embodiment 3-1

Figure 15 shows the method for the improved auxiliary node adding procedure of execution in accordance with one embodiment of the present disclosure. Present embodiment proposes a kind of alternative for helping auxiliary node to determine that auxiliary node changes.In the opposite manner, this public affairs Open a kind of alternative for proposing and host node being helped to determine switching while maintaining auxiliary node.In addition, present embodiment It can be applied to another process.

First, it is assumed that source auxiliary node receives the measurement report about adjacent node from UE, and UE service is unloaded in determination It is downloaded to one of adjacent node.

In step S702, auxiliary node addition request message is sent auxiliary node by host node.Auxiliary node addition Request message may include at least one of following information.

(1) list of the neighbouring auxiliary node of auxiliary node is connected to by X2/Xn interface: the list of neighbouring auxiliary node It may include eNB/gNB ID and/or cell ID.Then, the list of neighbouring auxiliary node can be used to help auxiliary node to touch It sends out auxiliary node and changes process.In other words, auxiliary node can determine the auxiliary of future based on the list of neighbouring auxiliary node Node is helped to change.Host node obtains neighbour by the X2/Xn setting up procedure between host node and the auxiliary node on its periphery first The list of nearly auxiliary node.

(2) it the information and/or access restriction information about UE roaming: then, can also use the information to help to assist Node triggers auxiliary node and changes process.

(3) list of the neighbouring host node of host node is connected to by X2/Xn interface.

It can store auxiliary node addition from the auxiliary node that host node receives auxiliary node addition request message to ask Ask information included in message, and the information stored in the moving process that looks to the future.For example, auxiliary node can assist Node changes process or considers information included in auxiliary node addition request message during being switched to another host node. Corresponding information is important for auxiliary node determines potential target auxiliary node.

In step S704, auxiliary node addition request confirmation message is sent host node by auxiliary node.Auxiliary node Adding request confirmation message may include at least one of following information.

(1) list of the neighbouring host node of auxiliary node is connected to by X2/Xn interface: the list of neighbouring host node can be with Including eNB/gNB ID and/or cell ID.

(2) list of the neighbouring auxiliary node of auxiliary node is connected to by X2/Xn interface.

When determination is switched to another host node while maintaining auxiliary node, auxiliary section is received from auxiliary node Information included in auxiliary node addition request confirmation message can be used in the host node of point addition request confirmation message.

3-2. embodiment 3-2

Figure 16 is shown between execution in accordance with one embodiment of the present disclosure improved host node and auxiliary node The method of X2/Xn setting up procedure.Present embodiment proposes a kind of alternative for helping auxiliary node to determine that auxiliary node changes Method.In the opposite manner, the present disclosure proposes a kind of alternatives for helping host node to determine switching while maintaining auxiliary node Method.In addition, present embodiment can be applied to another process.

In step S712, X2/Xn setting request message is sent auxiliary node by host node.X2/Xn setting request disappears Breath may include at least one of following information.

(1) list of the neighbouring auxiliary node of auxiliary node is connected to by X2/Xn interface: the list of neighbouring auxiliary node It may include eNB/gNB ID and/or cell ID.Then, the list of neighbouring auxiliary node can be used to help auxiliary node to touch It sends out auxiliary node and changes process.In other words, auxiliary node can determine the auxiliary of future based on the list of neighbouring auxiliary node Node is helped to change.Host node obtains neighbour by the X2/Xn configuration process between host node and the auxiliary node on its periphery first The list of nearly auxiliary node.

(2) list of the neighbouring host node of host node is connected to by X2/Xn interface.

It can store X2/Xn setting request message from the auxiliary node that host node receives X2/Xn setting request message In included information, and the information stored in the moving process that looks to the future.For example, auxiliary node can change in auxiliary node Change process considers information included in X2/Xn setting request message during being switched to another host node.Corresponding letter Breath is important for auxiliary node determines potential target auxiliary node.

In step S714, X2/Xn setting response message is sent host node by auxiliary node.X2/Xn setting response disappears Breath may include at least one of following information.

(1) list of the neighbouring host node of auxiliary node is connected to by X2/Xn interface: the list of neighbouring host node can be with Including eNB/gNB ID and/or cell ID.

(2) list of the neighbouring auxiliary node of auxiliary node is connected to by X2/Xn interface.

When determination is switched to another host node while maintaining auxiliary node, X2/Xn is received from auxiliary node Information included in X2/Xn setting response message can be used in the host node that request message is arranged.

3-3. embodiment 3-3

Figure 17 shows the X2/Xn settings between the improved auxiliary node of execution in accordance with one embodiment of the present disclosure The method of process.Present embodiment proposes a kind of alternative for helping auxiliary node to determine that auxiliary node changes.In addition, this Embodiment can be applied to another process.

In step S722, X2/Xn setting request message is sent the second auxiliary node by the first auxiliary node.X2/Xn It may include the list that the neighbouring host node of the first auxiliary node is connected to by X2/Xn interface that request message, which is arranged,.It is neighbouring main The list of node may include eNB/gNB ID and/or cell ID.Then, the list of neighbouring host node can be used to help the Two auxiliary nodes trigger auxiliary node and change process.In other words, the second auxiliary node can be based on the list of neighbouring host node To determine that following auxiliary node changes.First auxiliary node passes through first between the first auxiliary node and the host node on its periphery X2/Xn setting up procedure obtain the list of neighbouring host node.

It can store X2/Xn from the second auxiliary node that the first auxiliary node receives X2/Xn setting request message to set Set information included in request message, and the information stored in the moving process that looks to the future.For example, the second auxiliary node can To consider information included in X2/Xn setting request message during auxiliary node changes.Corresponding information is for second Auxiliary node is important for determining potential target auxiliary node.

In step S724, X2/Xn setting response message is sent the first auxiliary node by the second auxiliary node.X2/Xn It may include the list that the neighbouring host node of the second auxiliary node is connected to by X2/Xn interface that response message, which is arranged,.It is neighbouring main The list of node may include eNB/gNB ID and/or cell ID.Then, the list of neighbouring host node can be used to help the One auxiliary node triggers auxiliary node and changes process.In other words, the first auxiliary node can be based on the list of neighbouring host node To determine that following auxiliary node changes.Second auxiliary node passes through first between the second auxiliary node and the host node on its periphery X2/Xn setting up procedure obtain the list of neighbouring host node.

It can be in such as auxiliary section from the first auxiliary node that the second auxiliary node receives X2/Xn setting response message Point changes in such following mobile process using information included in X2/Xn setting response message.Corresponding information pair It is important for the first auxiliary node determines potential target auxiliary node.

In addition, when the list for the neighbouring host node that exchange is connect with the first auxiliary node and the second auxiliary node, first Auxiliary node and the second auxiliary node can learn whether share same host node between them.If the first auxiliary node and Second auxiliary node shares same host node, then an auxiliary node may determine whether directly to share same host node its Its auxiliary node initiates auxiliary node and changes process.

According to embodiment of the present disclosure, auxiliary node, which can be serviced, is directly unloaded to another auxiliary node.Alternatively, Host node may determine whether to maintain auxiliary node.Therefore, compared with traditional technology, it is possible to reduce signaling amount.In addition, UE can be with Service is received under the conditions of more optimized.Furthermore it is possible to improve the utilization of the radio resource of host node and auxiliary node.

Figure 18 shows the wireless communication system for realizing embodiment of the present disclosure.

First node 800 includes processor 810, memory 820 and transceiver 830.First node 800 can be above-mentioned Any of host node, source auxiliary node and target auxiliary node.In other words, first node can be eNB, gNB, ng- Any of eNB and en-gNB.Processor 810 can be configured as realize describe in the disclosure function, processing and/or Method.Radio interface protocol layers can be realized by processor 810.The memory 820 for being connected to processor 810 is stored for grasping Deal with each information of device 810.The transceiver 830 for being connected to processor 810 sends and/or receives signal.

Second node 900 includes processor 910, memory 920 and transceiver 930.Second node 900 can be above-mentioned Any of host node, source auxiliary node and target auxiliary node.In other words, second node can be eNB, gNB, ng- Any of eNB and en-gNB.Processor 910 can be configured as realize describe in the disclosure function, processing and/or Method.Radio interface protocol layers can be realized by processor 910.The memory 920 for being connected to processor 910 is stored for grasping Deal with each information of device 910.The transceiver 930 for being connected to processor 910 sends and/or receives signal.

First node 800 and second node 900 are connected to each other by X2 interface or Xn interface.

Processor 810,910 may include specific integrated circuit (ASIC), other chipsets, logic circuit and/or data Processing unit.Memory 820,920 may include read-only memory (ROM), random access memory (RAM), flash memory, Storage card, storage medium and/or other storage devices.Transceiver 830,930 may include the base for handling radio signal Band circuit.When with software realization embodiment, it can be realized with the module (processing or function) for executing above-mentioned function Method mentioned above.Module can be stored in memory 820,920 and be executed by processor 810,910.Storage Device 820,920 may be mounted at the internal or external of processor 810,910 and can connect everywhere via various well-known devices Manage device 810,910.

Figure 19 shows the wireless communication system for realizing embodiment of the present disclosure.

Processor 810 includes X2 application protocol (X2-AP) layer 811, Flow Control Transmission Protocol (SCTP) layer 812, internet Agreement (IP) layer 813, datalink layer connection 814 and physical layer 815.X2-AP layer 811 is included in radio-network layer (RNL). RNL defines the process of the intercorrelation between eNB.X2-AP layer 811, which defines, to be responsible for providing signaling information by X2 interface Agreement.X2-AP layer 811 is terminated by two eNB being connected to each other by X2 interface.X2-AP layer 811 can be by X2-AP process mould Block is realized.X2-AP layer 811 can be configured as function, processing and/or the method realized and described in the disclosure.SCTP layers 812, IP layer 813, datalink layer connection 814 and physical layer 815 can be included in transmission network layer (TNL).TNL is signaling biography It send and user plane and service is provided.

Processor 910 includes X2-AP layer 911, SCTP layer 912, IP layer 913, datalink layer connection 914 and physical layer 915. X2-AP layer 911 is included in RNL.RNL defines the process of the intercorrelation between eNB.X2-AP layer 911 defines responsible The agreement of signaling information is provided by X2 interface.X2-AP layer 911 is terminated by two eNB being connected to each other by X2 interface.X2- AP layer 911 can be realized by X2-AP procedure module.X2-AP layer 911 can be configured as the function realized and described in the disclosure Energy, processing and/or method.SCTP layer 912, IP layer 913, datalink layer connection 914 and physical layer 915 can be included in TNL. TNL provides user plane and service for signaling transmission.

By exemplary system described herein, describing referring to multiple flow charts can be according to published subject The method of realization.Although method is shown and described as series of steps or frame for simplicity, it will be appreciated that and understanding, institute Claimed theme is not limited by the order of step or frame because some steps can in different order or with retouch herein The other steps drawn and described simultaneously occur.In addition, it will be apparent to one skilled in the art that with the step of flowchart illustration not It is exclusive, and may include other steps, or example can be deleted in the case where not influencing the scope of the present disclosure It is one or more in step in flow chart.