CN109548095A

CN109548095A - Switch the method and device of serving cell

Info

Publication number: CN109548095A
Application number: CN201710681888.3A
Authority: CN
Inventors: 汪巍崴; 柯小婉; 王弘; 许丽香
Original assignee: Beijing Samsung Telecommunications Technology Research Co Ltd; Samsung Electronics Co Ltd
Current assignee: Beijing Samsung Telecommunications Technology Research Co Ltd; Samsung Electronics Co Ltd
Priority date: 2017-08-10
Filing date: 2017-08-10
Publication date: 2019-03-29
Anticipated expiration: 2037-08-10
Also published as: CN116112995A; CN109548095B; CN116367249A

Abstract

The embodiment of the invention provides a kind of method and devices for switching serving cell, wherein, switch the method for serving cell, comprising: auxiliary node sends auxiliary node to host node and modifies requirement message, so that host node modifies requirement message switching serving cell according to auxiliary node and discharges carrying to be released；Auxiliary node receives the auxiliary node that host node is returned for auxiliary node modification requirement message and modifies confirmation message.Method provided in an embodiment of the present invention, realize when switching serving cell that there are when carrying to be released, requirement message switching serving cell is modified according to auxiliary node and discharges the carrying to be released on auxiliary node, is greatly improved signalling efficiency, has been saved signal resource.

Description

Switch the method and device of serving cell

Technical field

The present invention relates to wireless communication technology fields, specifically, the present invention relates to a kind of methods for switching serving cell And device.

Background technique

In order to improve the handling capacity of user, LTE system introduces the concept of dual link (dual connectivity), i.e., One user can be connected to two different base stations simultaneously.In NR (New Radio access) network or the 5th generation 5G network In, dual link concept is further extended, and the multi-connection (MR-DC:Multi-RAT of a variety of different access technologies is introduced Dual Connectivity), i.e. a user can access the base station for supporting different access technologies simultaneously, as user accesses LTE and NR are supported respectively in two base stations.In the following discussion, we use MN (Master Node, host node) and SN (Secondary Node, auxiliary node) come indicate user access two base stations, as shown in Figure 1.Each node is possible to eat dishes without rice or wine Access technology has LTE, NR etc., and each node can access the core net of 5G system, can also access the core of 4G/LTE system Net.In above-mentioned scene, following concept is introduced:

■ MCG (Master Cell Group, main plot group): the cell group that user accesses on MN.In MCG cell, One is particular cell (PCell:Primary Cell), remaining is secondary cell (SCell:Secondary cell).PCell's Change can trigger user carry out random access process, while user access MN first cell be PCell, if user with The link fails of PCell, the user can not just be communicated (even if there is no problem for the link of SCell) with MN.SCell's Change the random access procedure that may not trigger user.

■ SCG (Secondary Cell Group, secondary cell group): the cell group that user accesses on SN.In SCG cell In, one is particular cell (PSCell:Primary SCell), and others are secondary cell (the SCG SCell:SCG of SCG Secondary Cell).The change of PSCell can trigger the process that user carries out random access, while user accesses the first of SN A cell is PSCell, if the link fails of user and PSCell, the user can not just be communicated with SN (even if There is no problem for the link of SCG SCell).The change of SCG SCell may not trigger the random access procedure of user.

Being discussed in detail for above-mentioned concept may refer to TS36.300v14.2.0.

Under MN and SN framework, the radio bearer of user includes four seed types:

■ MCG carries (MCG Bearer): the data of the carrying can be transmitted via MN and user, handle the number of such carrying According to protocol layer be all located at MN

■ MCG division carrying (MCG Split Bearer): the data of the carrying can be transmitted via MN and SN and user, but It is the PDCP (packet data convergence protocol, Packet Data Convergence Protocol) for the data for handling this kind of carrying Layer is located at MN, and can all have other protocol layers (RLC (Radio link of the data of such carrying of processing on MN and SN Control, wireless spread-spectrum technology)/MAC (Medium Access Control, media access control)/PHY (Physical Layer, physical layer)).

■ SCG carries (SCG bearer): the data of the carrying can be transmitted via SN and user, handle the number of such carrying According to protocol layer be all located at SN

■ SCG division carrying (SCG split bearer): the data of the carrying can be transmitted via MN and SN and user, but It is that the PDCP layers of the data for handling this kind of carrying is located at SN, and can all have other associations of the data of such carrying of processing on MN and SN It discusses layer (RLC/MAC/PHY).

Being discussed in detail for above-mentioned concept may refer to TS37.340.

It is above-mentioned about the concept of cell and the concept of carrying both for a user for.

In addition, in NR (New Radio access) network or the 5th generation 5G network, in order to support that network function is virtual Change, more efficient resource management and scheduling, it can be further for the base station (e.g., gNB) for providing radio network interface terminal (UE) It is divided into centralized unit CU (central unit) and distribution unit DU (distributed unit).CU at least has radio resource Control (RRC) and Packet Data Convergence Protocol (PDCP) protocol layer etc., it is also possible to include service data self-adapted protocol (SDAP: Service Data Adaptation Protocol).DU has radio link control (RLC), medium access control (MAC) and physical layer etc..It is standardized open interface F1 between CU and DU.F1 interface sub-control plane F1-C and user plane F1-U.The transport network layer of F1-C is transmitted based on IP.For more reliable transmission signaling, SCTP is increased on IP (Stream Control Transmission Protocol, Flow Control Transmission Protocol) agreement.The agreement of application layer is F1AP. SCTP can provide reliable application layer messages transmission.The transport layer of F1-U is UDP/IP (User Datagram Protocol/ Internet Protocol, User Datagram Protocol/Internet protocol), GTP-U (GPRS Tunnelling Protocol for The user plane, the GPRS Tunnel Protocol of user level) it is used to carry user-plane protocol data sheet on UDP/IP First PDU, Fig. 2 shows the structures of CU and DU.

In above-mentioned introduction, if between two nodes the user plane of one user of presence service interface (such as MN and The X2-U between F1-U, MN and the DU between X2-U, CU and DU between SN), the data Shi Huijian of user is transmitted between the two nodes A tunnel is found, this tunnel can correspond to two addresses (address 1 and address 2), the two addresses are on the two nodes respectively Address used in data is transmitted for this user, i.e. the data of the user are to be sent to address 2 by address 1 or sent out by address 2 It is sent to address 1.

In conjunction with the technology that above-mentioned multi-connection and CU-DU are separated, the mode that user is connected to network may are as follows: user connects simultaneously Enter MN and SN, and SN includes CU and at least one DU being connected with the CU, as shown in Figure 3.In this scenario, it is possible to use The reason of PSCell of family access being located on SN can change, this change occurs may be user in current PSCell Quality it is not so good, the overload etc. of current PSCell.This change is possibly including, but not limited to following situation:

■ PSCell becomes the SCG SCell for belonging to the same DU for being allocated to user from current PSCell.

■ PSCell is become being not configured to the cell for belonging to the same DU of user from current PSCell.

■ PSCell is become belonging to another DU (DU where another DU and current PSCell from current PSCell All connect with the same CU, that is, belong to the same SN) cell, as shown in Figure 4.

■ PSCell is become belonging to another DU (DU where another DU and current PSCell from current PSCell All from different CU connections, that is, belong to different SN) cell, as shown in Figure 5.

When above-mentioned PSCell change occurs, according to LTE system, SN modification process (stream of SN node initiation can be triggered The message that SN is received and dispatched in journey is actually to be received and dispatched by CU):

■ step 1:SN sends auxiliary node to MN and modifies demand (SN modification required) message, the message In contain SCG change instruction information (SCG Change Indication: the information indicate PSCell change.In practice, The instruction message also can indicate that other information) and SCG configuration information (SCG-Config, such as serving cell of the user on SN That is the configuration of SCG may include RLC configuration, MAC layer configuration etc.).

■ step 2&3: this two step is optional step, and the address of data forwarding and/or the encryption of new SN are provided as MN When code key, this two step can be triggered.

■ step 4: the configuration that PSCell changes if successfully completed, MN reply auxiliary node modification confirmation (SN to SN Modification confirm) message.

Above-mentioned process may refer to TS36.300v14.2.0.

According to existing mechanism, in above-mentioned steps 1, SCG changes instruction information and SCG configuration information (SCG-Config) Must occur simultaneously, if not allowing SCG occur in step 1 to change instruction letter about the information of releasing bearing in step 1 Breath, that is, existing mechanism are not supported the release of change and the carrying of PSCell while being occurred.

Summary of the invention

The purpose of the present invention is intended at least can solve above-mentioned one of technological deficiency, and it is small especially to cannot achieve switching service There are the technological deficiencies of carrying to be released when area.

The embodiment of the present invention provides a kind of method for switching serving cell according to one aspect, comprising:

Auxiliary node sends auxiliary node to host node and modifies requirement message, so that host node modifies need according to the auxiliary node It seeks message switching serving cell and discharges carrying to be released；

Auxiliary node receives the auxiliary node that host node is returned for the auxiliary node modification requirement message and modifies confirmation message.

The embodiment of the present invention additionally provides a kind of method for switching serving cell according to other side, comprising:

Host node receives the auxiliary node modification requirement message that auxiliary node is sent, and is cut according to the auxiliary node modification requirement message It changes serving cell and discharges carrying to be released；

Host node returns to the auxiliary node modification confirmation message for the auxiliary node modification requirement message to auxiliary node.

The embodiment of the present invention additionally provides a kind of device for switching serving cell according to other side, comprising:

First sending module sends auxiliary node to host node for auxiliary node and modifies requirement message, so that host node root According to the auxiliary node modification requirement message switching serving cell and discharge carrying to be released；

First receiving module receives the auxiliary section that host node is returned for the auxiliary node modification requirement message for auxiliary node Point modification confirmation message.

Second receiving module receives the auxiliary node that auxiliary node is sent for host node and modifies requirement message, according to described auxiliary Node modification requirement message switching serving cell simultaneously discharges carrying to be released；

Second sending module returns to the auxiliary node that requirement message is modified for the auxiliary node for host node to auxiliary node Modify confirmation message.

Embodiments of the present invention provide a kind of method for switching serving cell, and auxiliary node sends auxiliary node to host node Requirement message is modified, so that host node modifies requirement message switching serving cell according to auxiliary node and discharges to be released hold Carry, for it is subsequent according to auxiliary node modify requirement message discharged when switching serving cell the user on auxiliary node carry provide before Guarantee is proposed, auxiliary node receives the auxiliary node that host node is returned for auxiliary node modification requirement message and modifies confirmation message, realizes When switching serving cell there are when carrying to be released, requirement message switching serving cell is modified according to auxiliary node and is discharged auxiliary Carrying to be released on node, greatly improves signalling efficiency, has saved signal resource.

The additional aspect of the present invention and advantage will be set forth in part in the description, these will become from the following description Obviously, or practice through the invention is recognized.

Detailed description of the invention

Above-mentioned and/or additional aspect and advantage of the invention will become from the following description of the accompanying drawings of embodiments Obviously and it is readily appreciated that, in which:

Fig. 1 is the network structure of UE multi-connection in the prior art；

Fig. 2 is the structure chart of base station centralized unit and distribution unit in the prior art；

Fig. 3 is the network structure that UE is connected to the multi-connection including centralized unit and distribution unit in the prior art；

Fig. 4 is the schematic diagram for changing the distribution unit of service user in the prior art；

Fig. 5 is the schematic diagram for changing the auxiliary node of service of user in the prior art；

Fig. 6 is the flow chart of the method for the switching serving cell of first embodiment of the invention；

Fig. 7 is the flow chart of the method for the switching serving cell of second embodiment of the invention；

Fig. 8 is the signaling for the Service Distribution Unit that the embodiment of the present invention changes user by user's context Establishing process Flow chart；

Fig. 9 is that the embodiment of the present invention changes user by user's context Establishing process in the distribution of the same auxiliary node The signaling process figure of unit configuration；

Figure 10 is the signaling flow of the first PSCell of the modification user on the distribution unit of auxiliary node of the embodiment of the present invention Cheng Tu；

Figure 11 is the signaling flow of PSCell of second of the embodiment of the present invention modification user on the distribution unit of auxiliary node Cheng Tu；

Figure 12 is the signaling flow of the third PSCell of modification user on the distribution unit of auxiliary node of the embodiment of the present invention Cheng Tu；

Figure 13 is the signaling process figure for the auxiliary node modification that the auxiliary node of the embodiment of the present invention triggers；

Figure 14 is the signaling that user's context foundation is carried out between centralized unit and distribution unit of the embodiment of the present invention Flow chart；

Figure 15 is the signaling process figure for the user's context modification that the centralized unit of the embodiment of the present invention triggers；

Figure 16 is the signaling process figure (two for the user's context modification that the first distribution unit of the embodiment of the present invention triggers Step)；

Figure 17 is the signaling process figure (three for the user's context modification that second of distribution unit of the embodiment of the present invention triggers Step or four steps)

Figure 18 is the structural schematic diagram of the device of the switching serving cell of third embodiment of the invention；

Figure 19 is the structural schematic diagram of the device of the switching serving cell of fourth embodiment of the invention.

Specific embodiment

The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached The embodiment of figure description is exemplary, and for explaining only the invention, and is not construed as limiting the claims.

Those skilled in the art of the present technique are appreciated that unless expressly stated, singular " one " used herein, " one It is a ", " described " and "the" may also comprise plural form.It is to be further understood that being arranged used in specification of the invention Diction " comprising " refer to that there are the feature, integer, step, operation, element and/or component, but it is not excluded that in the presence of or addition Other one or more features, integer, step, operation, element, component and/or their group.It should be understood that when we claim member Part is " connected " or when " coupled " to another element, it can be directly connected or coupled to other elements, or there may also be Intermediary element.In addition, " connection " used herein or " coupling " may include being wirelessly connected or wirelessly coupling.It is used herein to arrange Diction "and/or" includes one or more associated wholes for listing item or any cell and all combinations.

Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art Language and scientific term), there is meaning identical with the general understanding of those of ordinary skill in fields of the present invention.Should also Understand, those terms such as defined in the general dictionary, it should be understood that have in the context of the prior art The consistent meaning of meaning, and unless idealization or meaning too formal otherwise will not be used by specific definitions as here To explain.

Those skilled in the art of the present technique are appreciated that " terminal " used herein above, " terminal device " both include wireless communication The equipment of number receiver, only has the equipment of the wireless signal receiver of non-emissive ability, and including receiving and emitting hardware Equipment, have on bidirectional communication link, can carry out two-way communication reception and emit hardware equipment.This equipment It may include: honeycomb or other communication equipments, shown with single line display or multi-line display or without multi-line The honeycomb of device or other communication equipments；PCS (Personal Communications Service, PCS Personal Communications System), can With combine voice, data processing, fax and/or communication ability；PDA (Personal Digital Assistant, it is personal Digital assistants), it may include radio frequency receiver, pager, the Internet/intranet access, web browser, notepad, day It goes through and/or GPS (Global Positioning System, global positioning system) receiver；Conventional laptop and/or palm Type computer or other equipment, have and/or the conventional laptop including radio frequency receiver and/or palmtop computer or its His equipment." terminal " used herein above, " terminal device " can be it is portable, can transport, be mounted on the vehicles (aviation, Sea-freight and/or land) in, or be suitable for and/or be configured in local runtime, and/or with distribution form, operate in the earth And/or any other position operation in space." terminal " used herein above, " terminal device " can also be communication terminal, on Network termination, music/video playback terminal, such as can be PDA, MID (Mobile Internet Device, mobile Internet Equipment) and/or mobile phone with music/video playing function, it is also possible to the equipment such as smart television, set-top box.

In 5G network, user is connected to MN and SN simultaneously, and SN includes a CU and at least one and the CU phase When the DU connected, the change of PSCell may lead the release of user's carrying.For example, because the movement of user, needs to change use The PSCell at family becomes connected to another DU (DU2) of the same CU, currently exists for this user such as by a DU (DU1) DU1 is configured with a PSCell and multiple SCG SCell, but only one cell is suitable on DU2, so on DU2 only Can be one PSCell of the user configuration, in other words in, in this process, service the cell of the user by multiple on DU1 Cell becomes a cell on DU2, in this way it is possible that having to discharge some carryings by SN for user service. Such scene is exactly that PSCell change occurs simultaneously with carrying release.And existing mechanism is that PSCell is not supported to change and hold It carries release while occurring.In addition, also to carry out the foundation and modification of user's context between CU and DU to support such scene Process, need to be thought of as during these user establish and modification serving cell context operation, this is existing begs for In without reference to.

In addition, in 5G network, a user can be connected to MN and SN simultaneously, and SN include a CU and at least one with The CU connected DU.In this scenario, the PSCell of user can change, while user's carrying on SN may be released It puts.In order to support the situation, the embodiment provides users between the process of Signalling exchange between MN and SN and CU and DU Context is established and the process of modification, specific as follows.

There are the technological deficiencies of carrying to be released when in order to solve to cannot achieve switching serving cell in the prior art, originally The first embodiment of invention provides a kind of method for switching serving cell, and detailed process is as shown in Figure 6, comprising: step 610, Auxiliary node sends auxiliary node to host node and modifies requirement message, so that host node modifies requirement message switching clothes according to auxiliary node Business cell simultaneously discharges carrying to be released；Step 620, auxiliary node receives what host node was returned for auxiliary node modification requirement message Auxiliary node modifies confirmation message.

Preferably, auxiliary node modification requirement message is included at least with the next item down: the information of carrying to be released, secondary cell group The instruction information that SCG changes, the first instruction information, second indication information, third indicate information, SCG configuration information and do not discharge Carrying information.

Preferably, the information of carrying to be released and the information for the carrying not discharged are included at least with the next item down: carrying Identification information, the service quality QoS parameter of carrying, the type information of carrying transmit the data of carrying between the two nodes Tunnel address information, the forwarding address of the upstream data of carrying, the forwarding address of the downlink data of carrying；The instruction that SCG changes Information is used to indicate the main plot PScell for changing SCG；SCG configuration information is auxiliary node generation about the SCG configured for UE Relevant configuration information；First instruction information is used to indicate host node and triggers to the auxiliary node modification request message of auxiliary node transmission； Second indication information is used to indicate host node and transmission SCG configuration information is forbidden to give user terminal UE；Third instruction information is for referring to Show that auxiliary node is forbidden updating SCG configuration information；The information for the carrying not discharged include each carrying not discharged information and/or The information of the information for the main plot group MCG division carrying not discharged, the main plot group MCG division carrying not discharged includes holding Address information of the tunnel of the data of the mark and transmission carrying of load in auxiliary node side.

Preferably, after the step of auxiliary node sends auxiliary node modification requirement message to host node, further includes: auxiliary node will SCG configuration information is sent to UE.

Preferably, host node is received in auxiliary node to disappear for the auxiliary node modification confirmation that auxiliary node modification requirement message returns Before the step of breath, further includes: receive the auxiliary node that host node is sent and modify request message；It is sent to host node and is directed to auxiliary node The auxiliary node for modifying request message modifies request confirmation message.

Preferably, auxiliary node modification request message is included at least with the next item down: the information of newly-increased carrying, to be modified holds The information of load, the information of carrying to be released, the encryption key information of auxiliary node, the instruction information that SCG changes, for configuring The information of SCG, the information for configuring SCG are the foundation for requesting UE to carry out SCG or modification or release that host node generates Information；Auxiliary node modification request confirmation message is included at least with the next item down: the information of received newly-increased carrying, received The information of carrying to be modified, the information of received carrying to be released, SCG configuration information, the MCG division carrying not discharged Information.

Preferably, before the step of auxiliary node sends auxiliary node modification requirement message to host node, further includes: auxiliary node Carry out corresponding UE context foundation or corresponding UE contextual modifications.

Preferably, auxiliary node includes a centralized unit CU and at least one distribution unit DU connecting with the CU, auxiliary Node carries out the step of corresponding UE context is established, comprising: sends UE context to DU by CU and establishes request message；Pass through CU receives the UE context that DU establishes request message return for UE context and establishes response message.

Preferably, UE context is established request message and is included at least with the next item down: cell list information, and CU is sent newly-increased The information of cell, carries and/or information the reason of identify related contextual information, establish UE context with UE；UE context Establish response message to include at least with the next item down: the identification information for the cell not received is carried with UE and/or is identified on related Context information, DU return to the reason of UE context establishes response message information, the information for the newly-increased cell that DU is sent；Cell list Information is included at least with the next item down: cell ID, the measurement result of cell；The information for the newly-increased cell that CU is sent includes CU true The information of the fixed alternative newly-increased cell of the information or CU of fixed newly-increased cell；The information of the fixed newly-increased cell of CU is extremely It less include with the next item down: cell list information, the identification information of one or more PCell cells, one or more SCell cells Identification information, the identification information of one or more PSCell cells, the identification information of one or more SCG SCell cells, The metrical information of cell；The information of the fixed alternative newly-increased cell of CU is included at least with the next item down: alternative cell list Information, the identification information of alternative one or more PCell cells, the identification information of alternative one or more SCell cells, The identification information of alternative one or more PSCell cells, the identification information of alternative one or more SCG SCell cells, The metrical information of alternative newly-increased cell；The information for the newly-increased cell that DU is sent is included at least with the next item down: selected PCell is small The mark in area, the mark of selected one or more SCell cells, the mark of selected PSCell cell, selected one or The mark of multiple SCG SCell cells；With UE related contextual information is carried and/or identified including at least in following information It is a kind of: the information of the carrying of user, the identification information of user；The reason of establishing UE context information and DU return to UE context and build The reason of vertical response message, information included at least one in following information: cell-overload, and cell uplink overloads, cell downlink mistake Carry, cell uplink control channel overload, load balancing, UE cell signal quality or intensity difference, UE cell uplink or The quality or intensity difference of downlink signal；The reason of establishing UE context information and the DU return to UE context and establish response message It is for each cell or for all cells.

Preferably, auxiliary node includes a centralized unit CU and at least one distribution unit DU connecting with CU, auxiliary node The step of carrying out corresponding UE contextual modifications, comprising: UE context modification request message is sent to DU by CU；It is connect by CU It receives DU and is directed to the UE contextual modifications response message that UE context modification request message returns.

Preferably, auxiliary node includes a centralized unit CU and at least one distribution unit DU connecting with the CU, auxiliary Node carries out the step of corresponding UE contextual modifications, comprising: sends UE contextual modifications requirement message to CU by DU；Pass through DU receives CU and is directed to the UE contextual modifications confirmation message that UE contextual modifications requirement message returns.

Preferably, auxiliary node includes a centralized unit CU and at least one distribution unit DU connecting with the CU, institute State the step of auxiliary node carries out corresponding UE contextual modifications, comprising:

UE contextual modifications requirement message is sent to CU by DU；

UE context modification request message is sent to DU by CU；

DU, which is received, by CU is directed to the UE contextual modifications response message that the UE context modification request message returns.

Preferably, it is repaired in the UE context returned by CU reception DU for the UE context modification request message After the step of changing response message, further includes:

The UE contextual modifications confirmation message that CU is returned is received by DU.

First embodiment of the invention provides a kind of method for switching serving cell, compared with prior art, auxiliary section Point sends auxiliary node to host node and modifies requirement message, so that host node is small according to the modification requirement message switching service of auxiliary node Area simultaneously discharges carrying to be released, is discharged on auxiliary node according to auxiliary node modification requirement message when switching serving cell to be subsequent User's carrying provide premise guarantee, auxiliary node receives the auxiliary node that host node is returned for auxiliary node modification requirement message and repairs Change confirmation message, realizes when switching serving cell there are when carrying to be released, requirement message is modified according to auxiliary node and is cut It changes serving cell and discharges the carrying to be released on auxiliary node, greatly improve signalling efficiency, saved signal resource.

In addition, when in order to solve to cannot achieve switching serving cell in the prior art, there are the technologies of carrying to be released to lack Fall into, the second embodiment of the present invention additionally provide it is a kind of switch serving cell method, detailed process as shown in fig. 7, comprises: step Rapid 710, host node receives the auxiliary node modification requirement message that auxiliary node is sent, and modifies requirement message switching service according to auxiliary node Cell simultaneously discharges carrying to be released；Step 720, host node returns to the auxiliary section for auxiliary node modification requirement message to auxiliary node Point modification confirmation message.

Second embodiment of the present invention provides a kind of method for switching serving cell, realizes in switching serving cell And there are when carrying to be released, host node can switch serving cell according to the auxiliary node modification requirement message received and release The carrying to be released on SN is put, signalling efficiency is greatly improved, has saved signal resource.

The introduction of extensive is carried out to the above embodiment of the present invention below according to different situations:

Wherein, the above embodiment of the present invention mainly solve the problems, such as be: as a user while when being connected to MN and SN, The main plot PSCell of user UE changes, while needing to discharge some carryings serviced by SN of user.Master herein is small The change of the particular cell PSCell that area PSCell is as hereafter used, the PSCell can occur in the same DU, can also To occur between different DU.When occur between different DU when, send MCG division carrying data used in tunnel (MN and Tunnel between DU) address can change.The title of signaling in following signaling processes is example, can be using others Title.Unify legislation is carried out to the middle some general information that can be used described below below, specific as follows shown:

The information of ■ carrying, the carrying can be newly-increased carrying or carrying to be modified or carrying to be released, or Received newly-increased carrying or received carrying to be modified or received carrying to be released, or be rejected new The carrying of increasing, or the carrying to be modified being rejected, or the carrying to be released being rejected comprising one kind of following information or It is a variety of:

The identification information of ■ carrying.

The qos parameter of ■ carrying, such as QoS Class Identifier (QoS class letter), 5G QoS Indicator (5G QoS identification), Allocation and Retention Priority (distribution and holding priority), Non- Standardised QoS Flow descriptor (the QoS flow descriptor of nonstandardized technique) etc. (specifically refers to agreement TS36.423, agreement TS38.423).

■ bearer types information, if MCG is carried, MCG division carrying, SCG carrying, SCG division carrying.

■ transmits the address information in tunnel used in the data of carrying between two nodes, such as GTP tunnel terminal point information (GTP Tunnel Endpoint, referring to agreement TS36.423) comprising transport Layer address information (Transport layer Address, referring to agreement TS36.424, TS36.414) and/or GTP tunnel Endpoint ID (GTPTunnel Endpoint Identifier, referring to agreement TS29.281).The two nodes can be the centralized unit of MN and SN or MN and SN respectively, Or the distribution unit or centralized unit and distribution unit of MN and SN, and the address information is side address of node letter Breath, such as MN, SN, the centralized unit of SN, the distribution unit of SN, the centralized unit of base station, the distribution unit etc. of base station.

The forwarding address (UL forwarding GTP Tunnel Endpoint) of the upstream data of ■ carrying, such as sends The address of the node side of the carrying information.

The forwarding address (DL forwarding GTP Tunnel Endpoint) of the downlink data of ■ carrying, such as sends The address of the node side of the carrying information.

The instruction information (SCG Change Indication) that SCG changes, which can indicate that PSCell changes Become, can also indicate that other content, such as PDCPCountWrapAround (PDCP counting ring around).

SCG configuration information (SCG-Config), the configuration information are the correlations about the SCG for user configuration that SN is generated Configuration information, such as the configuration of PSCell, the configuration of SCG SCell, RLC configuration, MAC layer configuration etc..

For configuring the message (SCG-ConfigInfo) of SCG, which is that the request user that MN is generated carries out building for SCG It is vertical, modification and release, while MN can also provide some help SN auxiliary information for generating SCG-Config in the information.

In order to simplify following verbal description, unless stated otherwise, the instruction otherwise just changed with the information of carrying, SCG Information and SCG configuration information (SCG-Config) indicate the particular contents of above- mentioned information.

Firstly, providing the example of related signaling process:

1) PSCell of the embodiment of the present invention and new PSCell belongs to different DU (the UE context foundation stream of CU triggering Journey), as shown in Figure 8.

2) PSCell of the embodiment of the present invention and new PSCell belongs to the same DU (the UE context foundation stream of CU triggering Journey), as shown in Figure 9.

3) PSCell of the embodiment of the present invention and new PSCell belongs to the same DU (the UE contextual modifications stream of CU triggering Journey), as shown in Figure 10.

4) PSCell of the embodiment of the present invention and new PSCell belongs to the same DU (the UE contextual modifications stream of DU triggering Journey), as shown in figure 11.

5) the signaling process figure of PSCell of the modification user of the embodiment of the present invention on the distribution unit of auxiliary node is such as schemed Shown in 12.

Above-mentioned signaling process can be divided into two parts: A) signaling process between MN and SN (or centralized unit in SN)； B) centralized unit in SN and the signaling process between distribution unit；This two parts is illustrated separately below:

Signaling process between A.MN and SN

Figure 13 shows the signaling process in Fig. 8 to 12 between MN and SN.Signaling process between the MN and SN that introduce as follows is not The case where being only applicable in signaling process shown in Fig. 8 to Figure 12, being also applied for other such as leads to the auxiliary node of auxiliary node triggering The case where modification.

Step 1: auxiliary node (or auxiliary node-centralized unit) sends auxiliary node to host node and modifies demand (SN Modification required) message, the information which includes is one or more of:

The information of carrying ■ to be released；

The instruction information that ■ SCG changes, information instruction change PSCell；

■ new instruction information, the information show that host node needs to trigger step 2；

■ is not necessarily to send SCG configuration information (SCG-Config) to the instruction information of user；

■ is not necessarily to update the instruction information of SCG configuration information (SCG-Config)；

■ SCG configuration information (SCG-Config)；

The information for the carrying that ■ does not discharge, the information can be about each carrying not discharged, is also possible to about portion Divide the carrying not discharged (such as the MCG division carrying not discharged).If user is to be connected to MN and SN (or the distribution list of SN simultaneously Member), in the information, address information refers to the address information of the distribution unit side of centralized unit side or SN in the side SN or SN.

Step 2: host node sends auxiliary node modification request (SN to auxiliary node (or auxiliary node-centralized unit) Modification request) message, which includes one of following information or a variety of:

The information of ■ newly-increased carrying；

The information of carrying ■ to be modified；

The information of carrying ■ to be released；

The encryption key information of the auxiliary node of ■；

The instruction information that ■ SCG changes；

■ is used to configure the message (SCG-ConfigInfo) of SCG.

Step 3: auxiliary node (or auxiliary node-centralized unit) sends auxiliary node to host node and modifies request confirmation (SN Modification request acknowledge) message, the information which includes is one or more of:

The information of the received newly-increased carrying of ■；

The information of the received carrying to be modified of ■；

The information of the received carrying to be released of ■；

■ SCG configuration information (SCG-Config)；

Step 4: host node sends auxiliary node modification confirmation (SN to auxiliary node (or auxiliary node-centralized unit) Modification confirm) message, which may include the message (SCG-ConfigInfo) for configuring SCG.

It should be noted that step 2 and 3 is optional step in above-mentioned steps.It may be as follows for triggering the condition of step 2 It is any:

■ includes the instruction information for triggering step 2 in step 1；

■ includes following information in step 1:

Carrying information ■ to be released, and

One of following information of ■ is a variety of:

◆ the instruction information that SCG changes, information instruction change PSCell

◆ SCG configuration information (SCG-Config)

◆ the information for the carrying not discharged, the information can be about each carrying not discharged, is also possible to about portion Divide the carrying not discharged (such as the MCG division carrying not discharged).If user is to be connected to MN and SN (or the distribution list of SN simultaneously Member), in the information, address information refers to the address information of the distribution unit side of centralized unit side or SN in the side SN or SN.

Above-mentioned process has following several specific embodiments, and (the possible trigger condition of these specific embodiments is: true in SN The PSCell for determining user changes and triggering when the carrying of release in need, and the change of PSCell is occurred in the same distribution In unit or in different distributions unit；It is not excluded for other trigger conditions).

Each specific embodiment is specifically introduced below.

Specifically, specific embodiment one (including two steps, i.e. step 1 and step 4, and MN send SCG-Config to Family equipment UE) detailed process is as follows state shown in:

Step 1: auxiliary node (or auxiliary node-centralized unit) sends auxiliary node to host node and modifies demand (SN Modification required) message, which includes following information:

The information of carrying ■ to be released；

■ is optional, the instruction information that SCG changes, and information instruction changes PSCell；

■ SCG configuration information (SCG-Config)；

■ is optional, and the information for the MCG division carrying not discharged includes at least following information:

The mark of ■ carrying；

Address information of the tunnel used in the data of ■ transmission carrying in the side SN or the distribution unit side of SN.

In above- mentioned information, the instruction information that SCG changes is option, can be by step 1 including not discharge The information and/or SCG configuration information (SCG-Config) of MCG division carrying, which carry out implicit expression, will change the PSCell of user.

Step 2/3: being not necessarily to this two step.

Step 4: host node sends auxiliary node modification confirmation (SN to auxiliary node (or auxiliary node-centralized unit) Modification confirm) message.

Then, the SCG configuration information (SCG-Config) received in step 1 is sent to user by host node, this step can With after step 1.

Specifically, specific embodiment two (including two steps, i.e. step 1 and step 4, and SN send SCG-Config to Family equipment UE) detailed process is as follows state shown in:

Step 1: auxiliary node (or auxiliary node-centralized unit) sends auxiliary node to host node and modifies demand (SN Modification required) message, the auxiliary node message includes following information:

The information of carrying ■ to be released；

◆ the mark of carrying；

◆ tunnel used in the data of carrying is transmitted in the address information of the side SN or the distribution unit side of SN.

In above- mentioned information, the instruction information that SCG changes is option, can be by step 1 including not discharge The information of MCG division carrying carrys out the PSCell that implicit expression changes user.

Step 2/3: being not necessarily to this two step.

Wherein, before step 1 or between step 1 and 4, auxiliary node generates SCG configuration information (SCG-Config), and Auxiliary node is sent to user after step 1.

Specifically, specific embodiment three (including four steps, i.e. step 1 to step 4, without SCG configuration information (SCG- in step 1 Config)) detailed process is as follows state shown in:

The information of carrying ■ to be released；

■ is optional, the instruction information that SCG changes, and information instruction changes PSCell, or, optionally, new instruction letter Breath, the information show that host node needs to trigger step 2；

The mark of ■ carrying；

In above- mentioned information, the instruction information that SCG changes is option, can be by step 1 including not discharge The information of MCG division carrying carrys out the implicit PSCell for indicating to change user or implicit expression host node needs to trigger step Rapid 2.

The information of ■ newly-increased carrying；

The information of carrying ■ to be modified may include after carrying out bearer types modification to carrying to be released in step 1 Carrying information；

The information of carrying ■ to be released；

The encryption key information of the auxiliary node of ■；

The instruction information that ■ SCG changes；

■ is used to configure the message (SCG-ConfigInfo) of SCG.

■ SCG configuration information (SCG-Config)；

The mark of ■ carrying；

In above-mentioned steps, SCG configuration information (SCG-Config) can be sent to user by auxiliary node, can also be by leading Node is sent to user.If being sent by auxiliary node, a kind of embodiment is, after step 1, SCG is matched confidence by auxiliary node Breath (SCG-Config) (the SCG configuration information (SCG-Config) generated after such as step 2) is sent to user, then nothing in step 3 Need to include SCG configuration information (SCG-Config).Yet another embodiment is, in step 3 comprising SCG configuration information (SCG- Config), but the configuration information is sent by auxiliary node, and auxiliary node modifies demand (SN in the auxiliary node of step 1 Modification required) the auxiliary node of message or step 3 modifies request confirmation (SN modification request Acknowledge) instruction information is added in message, shows host node without sending SCG configuration information (SCG-Config).If by Host node is sent, and a kind of embodiment is to include SCG configuration information (SCG-Config), and host node sending step in step 3 The SCG configuration information (SCG-Config) received in 3.

Specifically, (including four steps, i.e. step 1 to step 4 have SCG configuration information (SCG- in step 1 to specific embodiment four Config) and SCG-Config updates in step 3) detailed process is as follows state shown in:

The information of carrying ■ to be released；

■ SCG configuration information (SCG-Config)；

The mark of ■ carrying；

In above- mentioned information, the instruction information that SCG changes is option, can be by step 1 including not discharge The information and/or SCG configuration information (SCG-Config) of MCG division carrying, which carry out implicit expression, will change the PSCell of user, Or implicit expression host node needs to trigger step 2.

The information of ■ newly-increased carrying；

The information of carrying ■ to be released；

The encryption key information of the auxiliary node of ■；

The instruction information that ■ SCG changes；

■ is used to configure the message (SCG-ConfigInfo) of SCG.

■ SCG configuration information (SCG-Config)；

The mark of ■ carrying；

Tunnel used in the data of carrying is transmitted in the address information of the side SN or the distribution unit side of SN.Step 4: main section Point sends auxiliary node modification confirmation (SN modification confirm) message to auxiliary node (or auxiliary node-centralized unit).

In above-mentioned steps, SCG configuration information (SCG-Config) can be sent to user by auxiliary node, can also be by leading Node is sent to user.If being sent by auxiliary node, a kind of embodiment is the SCG that auxiliary node will generate after step 2 Configuration information (SCG-Config), and without including SCG configuration information (SCG-Config) in step 3.Another embodiment For, auxiliary node the SCG configuration information (SCG-Config) in step 1 is first sent to user, then will be generated after step 2 SCG configuration information (SCG-Config) is sent to user.Yet another embodiment is, in step 3 comprising SCG configuration information (SCG-Config), but the configuration information is sent after step 3 by auxiliary node, and auxiliary node is needed in the auxiliary node modification of step 1 The auxiliary node of (SN modification require) message or step 3 is asked to modify request confirmation (SN modification Request acknowledge) message addition instruction information, show host node without sending SCG configuration information (SCG- Config).If sent by host node, a kind of embodiment is to include SCG configuration information (SCG-Config) in step 3, main The SCG configuration information (SCG-Config) received in node sending step 3.Yet another embodiment is that host node first sends step SCG configuration information (SCG-Config) in rapid 1 retransmits the SCG configuration information (SCG-Config) received in step 3.? Can be sent jointly by host node and auxiliary node, a kind of embodiment is, the SCG configuration information (SCG-Config) in step 1 by Host node is sent, and the SCG configuration information (SCG-Config) generated after step 2 is sent by auxiliary node；Another embodiment is, SCG configuration information (SCG-Config) in step 1 is sent by auxiliary node, the SCG configuration information (SCG- generated after step 2 Config it) is sent by host node, then can include in step 3 SCG configuration information (SCG-Config).

Specifically, (including four steps, i.e. step 1 to step 4 have SCG configuration information (SCG- in step 1 to specific embodiment five Config) and SCG-Config does not update in step 3) detailed process is as follows state shown in:

Step 1: auxiliary node (or auxiliary node-centralized unit) sends auxiliary node to host node and modifies demand (SN Modification require) message, which includes following information:

The information of carrying ■ to be released；

■ SCG configuration information (SCG-Config)；

The mark of ■ carrying；

The information of ■ newly-increased carrying；

The information of carrying ■ to be released；

The encryption key information of the auxiliary node of ■；

The instruction information that ■ SCG changes；

■ is used to configure the message (SCG-ConfigInfo) of SCG.

Step 3: auxiliary node (or auxiliary node-centralized unit) sends auxiliary node to host node and modifies request confirmation (SN Modification request acknowledge) message, which, can not comprising SCG configuration information (SCG-Config) Choosing, it may include the information for the MCG division carrying not discharged.

In above-mentioned steps, SCG configuration information (SCG-Config) can be sent from auxiliary node to user, or by main section Point sends SCG configuration information (SCG-Config) to user.If sent by auxiliary node, a kind of embodiment is that auxiliary node can It can be sent after step 1/2/3/4, optionally, auxiliary node can indicate that host node is not necessarily to user in step 1 or step 3 It sends SCG configuration information (SCG-Config).Yet another embodiment is, in step 3 comprising SCG configuration information (SCG- Config), but the configuration information is sent after step 3 by auxiliary node, and auxiliary node modifies request confirmation in the auxiliary node of step 3 Instruction information is added in (SN modification request acknowledge) message, shows that host node is matched without sending SCG Confidence ceases (SCG-Config).If sent by host node, a kind of embodiment is, host node may step 1/2/3/4 it Afterwards, what is sent is the SCG configuration information (SCG-Config) received in step 1.

B. the signaling process between centralized unit and distribution unit

The signaling process includes user's context Establishing process and user's context modification process.The two processes respectively can It is used in Fig. 8 into Figure 12, but the user's context Establishing process and user's context modification process introduced as follows not only limit It is used in the process of Fig. 8 to Figure 12, other can also be used and need that user is established and modified between centralized node and distribution node The case where context.

B-1. user's context Establishing process

The process includes two steps, as shown in figure 14:

Step 1: centralized unit sends user's context to distribution unit and establishes request (UE Context Setup Request) message, can be comprising one of following information or a variety of in the message:

■ cell list information, the list include one or more cells, which includes following letter

What is ceased is one or more:

■ cell ID；

The measurement result of ■ cell, such as signal quality, signal strength etc..

For ■ by the information of the CU newly-increased cell sent, this, which increases cell newly, can be centralized unit

Determining newly-increased cell, is also possible to alternative newly-increased cell, which includes following letter

What is ceased is one or more:

■ cell list information, the mark comprising one or more cells；

The identification information of ■ one or more PCell cell；

The identification information of ■ one or more SCell cell；

The identification information of ■ one or more PSCell cell；

The identification information of ■ one or more SCG SCell cell；

The metrical information of ■ cell, such as signal quality, signal strength etc..

■ and user carry and/or identify related context, such as the information of the carrying of user, the identification information of user (used ID on such as interface of the user between centralized unit and distribution unit, such as CU UE F1AP ID, this ID can be with Be by CU is newly assigned or CU be already allocated to the user, or both all include).

■ establishes the reason of user's context information, which can be for each cell, is also possible to for institute There is modification, possible reason includes one or more of, cell-overload, cell uplink or downlink overload, the uplink of cell Control channel overload, load balancing, signal quality or intensity difference of the user in cell, upstream or downstream signal of the user in cell Quality or intensity difference etc..

Step 2: distribution unit is according to itself access control criterion, it is determined whether receive the request of step 1, then to Centralized unit replys user's context and establishes response (UE Context Setup Response) message, can include in the message One of following information is a variety of:

For ■ by the information of the DU newly-increased cell sent, which may include one kind of following information

Or it is a variety of:

The mark of ■ selected PCell cell；

The mark of ■ selected one or more SCell cells；

The mark of ■ selected PSCell cell；

The mark of ■ selected one or more SCG SCell cells.

The identification information for the cell that ■ does not receive, the cell not received indicate to be not suitable for the cell being allocated to user；

■ and user carry related context, such as the information of the carrying of user；

■ distribution unit carries out the reason of above-mentioned reply information, which can be also possible to needle for each cell To all modifications, possible reason includes one or more of, cell-overload, cell uplink or downlink overload, cell Uplink control channel overload, load balancing, signal quality or intensity difference of the user in cell, upstream or downstream of the user in cell The quality of signal or intensity difference etc..

Distribution unit establishes the context of user according to determining cell.In addition, if distribution unit can receive step 1 Request message in content about cell configuration, user's context that distribution unit can reply in step 2 establishes response The information of above-mentioned selected cell is not included in (UE Context Setup Response) message.

Decision maker according to the configuration of the cell of user is different, and the information content that above-mentioned two step is included can not Together.Each specific embodiment is as follows:

A. centralized unit determines the cell configuration of user

It includes following content that the user's context of step 1, which establishes request (UE Context Setup Request) message, It is one or more:

For ■ by the information of the CU newly-increased cell sent, which includes the one or more of following information:

The identification information of ■ PCell cell；

The identification information of ■ one or more SCell cell；

The identification information of ■ PSCell cell；

The identification information of ■ one or more SCG SCell cell；

The metrical information of the above-mentioned cell of ■.

■ and user carry and/or identify related context, such as the message of the carrying of user, the identification information of user (used ID on such as interface of the user between centralized unit and distribution unit, such as CU UE F1AP ID, this ID can be with Be by CU is newly assigned or CU be already allocated to the user, or both all include)；

■ establishes the reason of user's context information, which can be also possible to for each cell for all Modification, possible reason includes one or more of, cell-overload, cell uplink or downlink overload, the uplink control of cell Channel overload processed, load balancing, signal quality or intensity difference of the user in cell, upstream or downstream signal of the user in cell Quality or intensity difference etc..

It may include as follows that the user's context of step 2, which establishes response (UE Context Setup Response) message, The one or more of content:

In addition, distribution unit can if distribution unit can receive the content in the request message of step 1 about cell configuration It is established in response (UE Context Setup Response) message with the user's context replied in step 2 not comprising upper It states information (identification information for the cell not received) related with cell and/or other information (is carried with user related Context, distribution unit carry out above-mentioned reply the reason of information).

B. distribution unit determines the cell configuration of user, and centralized unit only provides cell list

What is ceased is one or more:

The mark of ■ cell；

For ■ by the information of the DU newly-increased cell sent, which includes the one or more of following information:

The identification information of ■ PCell cell；

The identification information of ■ one or more SCell cell；

The identification information of ■ PSCell cell；

The identification information of ■ one or more SCG SCell cell.

The cell for including in above-mentioned steps 2 can be the area selected in the cell list given from step 1, be also possible to The cell in cell list not given in step 1.

C. distribution unit determines the cell configuration of user, and centralized unit provides the list of alternative cell

It includes in lower information that the user's context of step 1, which establishes request (UE Context Setup Request) message, It is one or more:

For ■ by the information of the newly-increased alternative cell sent CU, which includes the one or more of following information:

■ alternative cell list information, the mark comprising one or more cells；

The identification information of ■ alternative one or more PCell cells；

The identification information of ■ alternative one or more SCell cells；

The identification information of ■ alternative one or more PSCell cells；

The identification information of ■ alternative one or more SCG SCell cells；

The metrical information of the above-mentioned cell of ■, such as signal quality, signal strength etc..

The identification information of ■ PCell cell；

The identification information of ■ one or more SCell cell；

The identification information of ■ PSCell cell；

The identification information of ■ one or more SCG SCell cell.

The cell for including in above-mentioned steps 2 can be the cell that selects in the alternative cell given from step 1, can also be with It is the cell in the alternative cell not given in step 1.In addition, if distribution unit can receive in the request message of step 1 About the content of cell configuration, the user's context that distribution unit can reply in step 2 establishes response (UE Context Setup Response) do not include above-mentioned information related with cell in message (i.e. by the information of the newly-increased cell of DU transmission, not The identification information of the cell of receiving) and/or other information (related context is carried with user, distribution unit carries out above-mentioned The reason of reply information).

B-2. user's context modification process, the modification process can be centralized unit triggering, it is single to be also possible to distribution Member triggering.

A. the cell configuration modification process of centralized unit triggering includes two steps, as shown in figure 15:

Step 1: centralized unit sends user's context modification request (UE Context Modified to distribution unit Request) message, can be comprising one of following information or a variety of in the message:

■ cell list information, the list include one or more cells, which includes one kind or more of following information Kind:

■ cell ID；

■ by the CU newly-increased serving cell sent information, the newly-increased cell can be centralized unit have determined it is newly-increased Cell is also possible to alternative newly-increased cell, includes one of following information or a variety of:

■ cell list information, the mark comprising one or more cells；

The identification information of ■ one or more PCell cell；

The identification information of ■ one or more SCell cell；

The identification information of ■ one or more PSCell cell；

The identification information of ■ one or more SCG SCell cell；

The information of serving cell ■ to be modified includes one of following information or a variety of:

The mark of PCell cell ■ to be modified；

The mark of SCell cell ■ to be modified；

The mark of PSCell cell ■ to be modified；

The mark of SCG SCell cell ■ to be modified；

The cell ID that ■ cell type changes, and the type after indicating the cell before a modification: such as become by PCell At the mark of the cell of SCell, become the mark of the cell of PCell by SCell, becomes the cell of SCG SCell by PSCell Mark, become the mark of the cell of PSCell by SCG SCell；

The information of serving cell ■ to be released, such as cell ID of cell to be released；

■ modifies the reason of user's context information, which can be also possible to for each cell for all Modification, possible reason includes one or more of, cell-overload, cell uplink or downlink overload, the uplink control of cell Channel overload processed, signal quality or intensity difference of the load balancing user in cell, upstream or downstream signal of the user in cell Quality or intensity difference etc..

Step 2: distribution unit sends user's context modification response (UE Context Modified to centralized unit Response) message, may be comprising one of following information or a variety of in the message:

The cell ID of the selected newly-increased cell of the cell ID or distribution unit for the newly-increased cell that ■ receives, can Choosing, indicate the type of the newly-increased cell, such as PCell, SCell, PSCell, SCG SCell；

The cell ID for the newly-increased cell that ■ does not receive.

The information of ■ cell to be modified, the information include the one or more of following information:

The cell ID for the cell to be modified that ■ receives；

The cell ID for the cell to be modified that ■ does not receive.

The information of ■ cell to be released, the information include the one or more of following information:

The cell ID for the cell to be released that ■ receives；

The cell ID for the cell to be released that ■ does not receive.

■ carries out the reason of above-mentioned response information, which can be also possible to repair for all for each cell Change, possible reason includes one or more of, cell-overload, cell uplink or downlink overload, the upload control of cell Channel overload, signal quality or intensity difference of the load balancing user in cell, matter of the user in the upstream or downstream signal of cell Amount or intensity difference etc..

The newly-increased cell of receiving in above-mentioned steps 2 can be the cell list information for including from step 1 or newly-increased clothes It is obtained in business cell, is also possible to other cells.Distribution unit modifies the context of user according to the information in step 2. In addition, distribution unit can be in step if distribution unit can receive the content in the request message of step 1 about cell configuration Do not include in user's context modification response (the UE Context Modification Response) message replied in 2 above-mentioned Information related with cell is (i.e. by the information of the DU newly-increased cell sent, the information of cell to be modified, the letter of cell to be released Breath) and/or other information the reason of (related context is carried with user, distribution unit carries out above-mentioned response information).

B. the cell configuration modification process of distribution unit triggering includes two steps, as shown in figure 16:

Step 1: distribution unit sends user's context to centralized unit and modifies demand (UE Context Modified Required) message, can be comprising one of following information or a variety of in the message:

The mark of PCell cell ■ to be modified；

The mark of SCell cell ■ to be modified；

The mark of PSCell cell ■ to be modified；

The mark of SCG SCell cell ■ to be modified；

■ and user carry related context, such as the message of the carrying of user；

■ modifies the reason of user's context information, which can be also possible to for each cell for all Modification, possible reason includes one or more of, cell-overload, cell uplink or downlink overload, the uplink control of cell Channel overload processed, load balancing, signal quality or intensity difference of the user in cell, upstream or downstream signal of the user in cell Quality or intensity difference etc..

Step 2: centralized unit sends user's context modification confirmation (UE Context Modified to distribution unit Confirm) message, may be comprising one of following information or a variety of in the message:

The cell ID for the cell to be modified that ■ receives；

The cell ID for the cell to be modified that ■ does not receive.

The cell ID for the cell to be released that ■ receives；

The cell ID for the cell to be released that ■ does not receive.

■ centralized unit carries out the reason of above-mentioned response information, which can be also possible to needle for each cell To all modifications, possible reason includes one or more of, cell-overload, cell uplink or downlink overload, cell Uplink control channel overload, load balancing, signal quality or intensity difference of the user in cell, upstream or downstream of the user in cell The quality of signal or intensity difference etc..

If centralized unit can receive the content in the request message of step 1 about cell configuration, centralized unit can be Do not include in user's context modification confirmation (the UE Context ModificationConfirm) message replied in step 2 upper State information (information of cell i.e. to be modified, the information of cell to be released) related with cell and/or other information (i.e. and user Carry related context, the reason of centralized unit carries out above-mentioned response information).

C. the cell configuration modification process of distribution unit triggering includes three steps or four steps, as shown in figure 17:

The mark of PCell cell ■ to be modified；

The mark of SCell cell ■ to be modified；

The mark of PSCell cell ■ to be modified；

The mark of SCG SCell cell ■ to be modified；

■ and user carry related context, the information of the carrying of user；

Step 2: centralized unit sends user's context modification request (UE Context Modified to distribution unit Request) message, can be comprising one of following information or a variety of in the message:

■ cell ID；

■ cell list information, the mark comprising one or more cells；

The identification information of ■ one or more PCell cell；

The identification information of ■ one or more SCell cell；

The identification information of ■ one or more PSCell cell；

The identification information of ■ one or more SCG SCell cell；

The mark of PCell cell ■ to be modified；

The mark of SCell cell ■ to be modified；

The mark of PSCell cell ■ to be modified；

The mark of SCG SCell cell ■ to be modified；

Cell indicated by information related with cell in above-mentioned steps 2 may include or not include included in step 1 The related information of cell indicated by cell.

Step 3: distribution unit sends user's context modification response (UE Context Modified to centralized unit Response) message, may be comprising one of following information or a variety of in the message:

The cell ID for the newly-increased cell that ■ does not receive.

The cell ID for the cell to be modified that ■ receives；

The cell ID for the cell to be modified that ■ does not receive.

The cell ID for the cell to be released that ■ receives；

The cell ID for the cell to be released that ■ does not receive.

The newly-increased cell of receiving in above-mentioned steps 3 can be the cell list information for including from step 2 or newly-increased clothes It is obtained in business cell, is also possible to other cells.Distribution unit modifies the context of user according to the information in step 3. In addition, distribution unit can be in step if distribution unit can receive the content in the request message of step 2 about cell configuration Do not include in user's context modification response (the UE Context Modification Response) message replied in 3 above-mentioned Information related with cell is (i.e. by the information of the DU newly-increased cell sent, the information of cell to be modified, the letter of cell to be released Breath) and/or other information the reason of (related context is carried with user, distribution unit carries out above-mentioned response information).

Step 4: centralized unit sends user's context modification confirmation (UE Context Modified to distribution unit Confirm) message, the step are optional steps, may include one of following information or a variety of in the message:

■ increases the information of cell newly, which includes the one or more of following information:

The cell ID for the newly-increased cell that ■ receives；

The cell ID for the newly-increased cell that ■ does not receive

The cell ID for the cell to be modified that ■ receives；

The cell ID for the cell to be modified that ■ does not receive.

The cell ID for the cell to be released that ■ receives；

The cell ID for the cell to be released that ■ does not receive.

Increasing cell and/or cell to be modified and/or cell to be released in above-mentioned steps 4 newly can be and include from step 3 Newly-increased cell and/or serving cell to be modified and/or serving cell to be released in obtain, it is small to be also possible to other Area.Distribution unit modifies the context of user according to the information in step 4.In addition, if centralized unit can receive step 3 Content in response message about cell configuration, the user's context modification confirmation (UE that centralized unit can reply in step 4 Context ModificationConfirm) do not include above-mentioned information related with cell in message and (increases the letter of cell newly Breath, the information of cell to be modified, the information of cell to be released) and/or other information (related context is carried with user, Centralized unit carries out the reason of above-mentioned response information).

The third embodiment of the present invention additionally provides a kind of device for switching serving cell, as shown in figure 18, including first Sending module S10 and the first receiving module S11.

First sending module S10 sends auxiliary node to host node for auxiliary node and modifies requirement message, so that host node Requirement message switching serving cell is modified according to auxiliary node and discharges carrying to be released；

First receiving module S11 receives the auxiliary section that host node is returned for auxiliary node modification requirement message for auxiliary node Point modification confirmation message.

The device for the switching serving cell that embodiment of the present invention provides, auxiliary node send auxiliary node modification to host node and need Message is sought, so that host node modifies requirement message switching serving cell according to auxiliary node and discharges carrying to be released, after being It is continuous requirement message modified according to auxiliary node discharge the user on auxiliary node when switch serving cell and carry provide premise guarantee, Auxiliary node receives the auxiliary node that host node is returned for auxiliary node modification requirement message and modifies confirmation message, realizes and takes in switching There are when carrying to be released when cell of being engaged in, requirement message switching serving cell is modified according to auxiliary node and is discharged on auxiliary node Carrying to be released greatly improves signalling efficiency, has saved signal resource.

The fourth embodiment of the present invention additionally provides a kind of device for switching serving cell, as shown in figure 19, including second Receiving module S13 and the second sending module S12.

Second receiving module S13 receives the auxiliary node that auxiliary node is sent for host node and modifies requirement message, according to auxiliary section Point modification requirement message switching serving cell simultaneously discharges carrying to be released；

Second sending module S12 returns to the auxiliary node that requirement message is modified for auxiliary node for host node to auxiliary node Modify confirmation message.

Present embodiment is realized in switching serving cell and there are when carrying to be released, and host node can be according to reception To the modification requirement message switching of auxiliary node serving cell and discharge the carrying to be released on auxiliary node, greatly improve signaling Efficiency of transmission has saved signal resource.

Those skilled in the art of the present technique are appreciated that the present invention includes being related to for executing in operation described herein One or more equipment.These equipment can specially design and manufacture for required purpose, or also may include general Known device in computer.These equipment have the computer program being stored in it, these computer programs are selectively Activation or reconstruct.Such computer program can be stored in equipment (for example, computer) readable medium or be stored in It e-command and is coupled in any kind of medium of bus respectively suitable for storage, the computer-readable medium includes but not Be limited to any kind of disk (including floppy disk, hard disk, CD, CD-ROM and magneto-optic disk), ROM (Read-Only Memory, only Read memory), RAM (Random Access Memory, immediately memory), EPROM (Erasable Programmable Read-Only Memory, Erarable Programmable Read only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory, Electrically Erasable Programmable Read-Only Memory), flash memory, magnetic card or light card Piece.It is, readable medium includes by equipment (for example, computer) with any Jie for the form storage or transmission information that can be read Matter.

Those skilled in the art of the present technique be appreciated that can be realized with computer program instructions these structure charts and/or The combination of each frame and these structure charts and/or the frame in block diagram and/or flow graph in block diagram and/or flow graph.This technology neck Field technique personnel be appreciated that these computer program instructions can be supplied to general purpose computer, special purpose computer or other The processor of programmable data processing method is realized, to pass through the processing of computer or other programmable data processing methods The scheme specified in frame or multiple frames of the device to execute structure chart and/or block diagram and/or flow graph disclosed by the invention.

Those skilled in the art of the present technique have been appreciated that in the present invention the various operations crossed by discussion, method, in process Steps, measures, and schemes can be replaced, changed, combined or be deleted.Further, each with having been crossed by discussion in the present invention Kind of operation, method, other steps, measures, and schemes in process may also be alternated, changed, rearranged, decomposed, combined or deleted. Further, in the prior art to have and the step in various operations, method disclosed in the present invention, process, measure, scheme It may also be alternated, changed, rearranged, decomposed, combined or deleted.

The above is only some embodiments of the invention, it is noted that for the ordinary skill people of the art For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered It is considered as protection scope of the present invention.

Claims

1. a kind of method for switching serving cell, which is characterized in that be applied to dual link framework, the dual link framework includes master Node and auxiliary node, comprising:

Auxiliary node sends auxiliary node to host node and modifies requirement message, so that host node disappears according to the auxiliary node modification demand Breath switching serving cell simultaneously discharges carrying to be released；

2. the method according to claim 1, wherein the auxiliary node modification requirement message is included at least with next : the information of carrying to be released, the instruction information that secondary cell group SCG changes, the first instruction information, second indication information, the The information of three instruction information, SCG configuration information and the carrying not discharged.

3. according to the method described in claim 2, it is characterized in that, the letter of the information of carrying to be released and the carrying not discharged Breath is included at least with the next item down: the identification information of carrying, the service quality QoS parameter of carrying, the type information of carrying, at two The tunnel address information of the data of carrying, the forwarding address of the upstream data of carrying, the downlink data of carrying are transmitted between node Forwarding address；

The instruction information that the SCG changes is used to indicate the main plot PScell for changing SCG；

The SCG configuration information is the relevant configuration information about the SCG configured for UE that auxiliary node generates；

First instruction information is used to indicate host node and triggers to the auxiliary node modification request message of auxiliary node transmission；

Second indication information is used to indicate host node and transmission SCG configuration information is forbidden to give user terminal UE；

Third instruction information is used to indicate auxiliary node and forbids updating SCG configuration information；

The information for the carrying not discharged includes the information of each carrying not discharged and/or the main plot group MCG not discharged division The information of the information of carrying, the main plot group MCG division carrying not discharged includes the mark of carrying and the number of transmission carrying According to tunnel auxiliary node side address information.

4. according to the method in claim 2 or 3, which is characterized in that the auxiliary node sends auxiliary node modification to host node After the step of requirement message, further includes:

SCG configuration information is sent to UE by auxiliary node.

5. method according to claim 1-3, which is characterized in that the auxiliary node receives host node for described Before the step of auxiliary node that auxiliary node modification requirement message returns modifies confirmation message, further includes:

It receives the auxiliary node that host node is sent and modifies request message；

The auxiliary node modification request confirmation message for the auxiliary node modification request message is sent to the host node.

6. according to the method described in claim 5, it is characterized in that, the auxiliary node modification request message is included at least with next : the information of newly-increased carrying, the information of carrying to be modified, the information of carrying to be released, the encryption code key letter of auxiliary node Breath, the instruction information that SCG changes, for configuring the information of SCG, the information for configuring SCG is asking for host node generation UE is asked to carry out the information of foundation or the modification or release of SCG；

The auxiliary node modification request confirmation message is included at least with the next item down: the information of received newly-increased carrying is received Carrying to be modified information, the information of received carrying to be released, SCG configuration information, do not discharge MCG division hold The information of load.

7. disappearing the method according to claim 1, wherein sending auxiliary node modification demand to host node in auxiliary node Before the step of breath, further includes:

Auxiliary node carries out corresponding UE context foundation or corresponding UE contextual modifications.

8. the method according to the description of claim 7 is characterized in that auxiliary node include a centralized unit CU and at least one with The distribution unit DU of the CU connection, the auxiliary node carry out the step of corresponding UE context is established, comprising:

UE context, which is sent, to DU by CU establishes request message；

The UE context that DU establishes request message return for the UE context, which is received, by CU establishes response message.

9. according to the method described in claim 8, it is characterized in that, the UE context establishes request message including at least following One: cell list information, the information for the newly-increased cell that CU is sent carry with UE and/or identify related contextual information, builds The reason of founding UE context information；

The UE context is established response message and included at least with the next item down: the identification information for the cell not received is carried with UE And/or the related contextual information of mark, DU return to the reason of UE context establishes response message information, what DU was sent increases newly small The information in area；

The cell list information is included at least with the next item down: cell ID, the measurement result of cell；

The information for the newly-increased cell that the CU is sent include the fixed newly-increased cell of CU information or CU it is fixed alternative The information of newly-increased cell；

The information of the fixed newly-increased cell of CU is included at least with the next item down: cell list information, one or more PCell The identification information of cell, the identification information of one or more SCell cells, the identification information of one or more PSCell cells, The identification information of one or more SCG SCell cells, the metrical information of cell；

The information of the fixed alternative newly-increased cell of the CU is included at least with the next item down: alternative cell list information, standby The identification information of one or more PCell cells of choosing, the identification information of alternative one or more SCell cells, alternative The identification information of one or more PSCell cells, the identification information of alternative one or more SCG SCell cells, alternative The metrical information of newly-increased cell；

The information for the newly-increased cell that the DU is sent is included at least with the next item down: the mark of selected PCell cell, and selected one The mark of a or multiple SCell cells, the mark of selected PSCell cell, selected one or more SCG SCell cells Mark；

It is described to carry and/or identify related contextual information with UE including at least one of following information: the carrying of user Information, the identification information of user；

The reason of establishing UE context information and the DU return to the reason of UE context establishes response message information at least Including one in following information: cell-overload, cell uplink overload, cell downlink overload, cell uplink control channel overload, Load balancing, signal quality or intensity difference of the UE in cell, quality or intensity difference of the UE in the upstream or downstream signal of cell；

It is for each cell that the reason of establishing UE context information and the DU, which return to UE context and establish response message, Or it is for all cells.

10. the method according to the description of claim 7 is characterized in that auxiliary node includes a centralized unit CU and at least one The step of distribution unit DU being connect with the CU, the auxiliary node carries out corresponding UE contextual modifications, comprising:

UE context modification request message is sent to DU by CU；

11. the method according to the description of claim 7 is characterized in that auxiliary node includes a centralized unit CU and at least one The step of distribution unit DU being connect with the CU, the auxiliary node carries out corresponding UE contextual modifications, comprising:

UE contextual modifications requirement message is sent to CU by DU；

CU, which is received, by DU is directed to the UE contextual modifications confirmation message that the UE contextual modifications requirement message returns.

12. the method according to the description of claim 7 is characterized in that auxiliary node includes a centralized unit CU and at least one The step of distribution unit DU being connect with the CU, the auxiliary node carries out corresponding UE contextual modifications, comprising:

UE contextual modifications requirement message is sent to CU by DU；

UE context modification request message is sent to DU by CU；

13. according to the method for claim 12, which is characterized in that receive DU for the UE context by CU described After the step of modifying the UE contextual modifications response message that request message returns, further includes:

14. a kind of method for switching serving cell, which is characterized in that be applied to dual link framework, the dual link framework includes Host node and auxiliary node, comprising:

Host node receives the auxiliary node modification requirement message that auxiliary node is sent, according to the auxiliary node modification requirement message switching clothes Business cell simultaneously discharges carrying to be released；

15. a kind of device for switching serving cell, which is characterized in that be applied to dual link framework, the dual link framework includes Host node and auxiliary node, comprising:

First sending module sends auxiliary node to host node for auxiliary node and modifies requirement message, so that host node is according to institute It states auxiliary node modification requirement message switching serving cell and discharges carrying to be released；

First receiving module receives the auxiliary node that host node is returned for the auxiliary node modification requirement message for auxiliary node and repairs Change confirmation message.

16. a kind of device for switching serving cell, which is characterized in that be applied to dual link framework, the dual link framework includes Host node and auxiliary node, comprising:

Second receiving module receives the auxiliary node that auxiliary node is sent for host node and modifies requirement message, according to the auxiliary node Modification requirement message switching serving cell simultaneously discharges carrying to be released；

Second sending module returns to the auxiliary node modification that requirement message is modified for the auxiliary node for host node to auxiliary node Confirmation message.