CN106937347A - Changing method and system are exhaled across the group of cluster core net - Google Patents
Changing method and system are exhaled across the group of cluster core net Download PDFInfo
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- CN106937347A CN106937347A CN201511019387.6A CN201511019387A CN106937347A CN 106937347 A CN106937347 A CN 106937347A CN 201511019387 A CN201511019387 A CN 201511019387A CN 106937347 A CN106937347 A CN 106937347A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/30—Resource management for broadcast services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/40—Connection management for selective distribution or broadcast
- H04W76/45—Connection management for selective distribution or broadcast for Push-to-Talk [PTT] or Push-to-Talk over cellular [PoC] services
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
- H04W4/10—Push-to-Talk [PTT] or Push-On-Call services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/08—Trunked mobile radio systems
Abstract
Changing method and system are exhaled the invention provides a kind of group across cluster core net, the present invention exhales information to generate the first preparation handover request by source base station according to the group that terminal is uploaded, by source cluster core net is according to the first preparation handover request generation conversion handover request and is sent to object set group's core net, target cluster core net sends handover information according to conversion handover request to group master control cluster core net, and group master control cluster core net control targe cluster core net carries out group and exhales enlarging.Target cluster core net sends conversion handoff response to source cluster core net after the completion of enlarging, source cluster core net generates and sends reconfiguration message to corresponding terminal according to conversion handoff response control source base station, last terminal carries out resource distribution according to reconfiguration message, and accesses target BS.The present invention carries out group and exhales enlarging and group call resource to distribute in advance in target cluster core net, and can immediately answer group after terminal accesses target BS exhales information, realizes the seamless switching that group is exhaled.
Description
Technical field
The invention belongs to mobile communication technology field, it is more particularly to a kind of across cluster core net
Group exhales changing method and system.
Background technology
Multimedia cluster system based on timesharing Long Term Evolution TD-LTE private networks broadband follows China
Broadband cluster communication (B-TrunC) system based on LTE technologies of communication standard association CCSA
Row standard.Broadband cluster communication (B-TrunC) the system series standard for being currently based on LTE technologies is complete
Into the standardization effort of terminal relevant interface, but, define only local single system network rack
Structure, undefined many cluster core net interconnectings or roaming architecture.Therefore many cluster cores cannot be utilized
The common construction network of heart net.And the user such as current cluster private network user, such as public security, railway is clear and definite
Need to build the cluster private network of the multi-vendor supply of material, it is necessary to build the network in the whole city or even the whole nation, because
This, for the intercommunication between cluster core net and roaming function explicit requirement.But currently not
Group exhales the implementation of switching between having broadband cluster core net, therefore cannot meet the upper of user
State demand.
The content of the invention
The technical problem to be solved in the present invention is how to realize between the cluster core net of broadband that group is exhaled to cut
Change.
In order to solve the above-mentioned technical problem, a kind of group across cluster core net of present invention offer is exhaled and cut
Method is changed, be the described method comprises the following steps：
A, terminal measure and report its group for hearing and exhale information to source base station；
B, the source base station receive described group and exhale information, exhale whether information decision is entered according to described group
Row is but changed, and is if desired switched over, then the source base station sends the first standard to source cluster core net
Standby handover request, the source cluster core net prepares handover request generation conversion according to described first
Handover request, and it is sent to object set group's core net；
C, the target cluster core net are according to the conversion handover request to a group master control cluster core
Net sends handover information, wherein the handover information is used to notify described group of master control cluster core net
There is terminal needs to carry out group to exhale switching；
D, described group of master control cluster core net control the target cluster core according to the handover information
Heart net carries out group and exhales enlarging, and after the completion of group exhales enlarging the target cluster core net to described
Source cluster core net sends conversion handoff response；
E, the source cluster core net generate switching command according to the conversion handoff response, concurrently
Give the source base station；The source base station generates reconfiguration message according to the generation switching command,
And terminal is sent to, the terminal carries out resource distribution according to the reconfiguration message, and accesses
The target BS.
Preferably, in the step B, the source cluster enhancing mobility of the source cluster core net
Management entity receives the first preparation handover request that the source base station sends, and the source
Cluster strengthens mobility management entity and is cut according to the described first preparation handover request generation conversion
Request is changed, and the conversion handover request is sent to the object set of the target cluster core net
Group's enhancing mobility management entity.
Preferably, step C is comprised the following steps：
The target cluster enhancing mobility management entity judges currently to be exhaled with the presence or absence of group, not
When there is group and exhaling, the target cluster strengthens mobility management entity to the target cluster core
The target SCC of net sends the first handover information；
The target SCC exhales target cluster enhancing ownership signing of the mark to the terminal according to group
Client server sends Address requests, and the target cluster strengthens home signature user server root
The address of the described group of group master control SCC of master control cluster core net is sent to according to the Address requests
The target SCC；
Be sent to for the second handover information according to the described group of address of master control SCC by the target SCC
Described group of master control SCC；
Wherein, the handover information includes first handover information and the second handover information,
Described group is exhaled mark to be carried on the handover information, the first preparation handover request and conversion switching
In request.
Preferably, step D is comprised the following steps：
Described group of master control SCC exhales enlarging information according to the second handover information generation group, and will be described
Group exhales enlarging information to be sent to the target SCC, and expansion is exhaled according to described group by the target SCC
The information of building carries out group and exhales enlarging；
Group is exhaled after the completion of enlarging, and the target cluster strengthens mobility management entity to target BS
Send second and prepare handover request；
It is concurrent that the target BS prepares handover request generation switching request response according to described second
Give the target cluster enhancing mobility management entity；
The target cluster enhancing mobility management entity generates institute according to the switching request response
Conversion handoff response is stated, and is sent to the source cluster enhancing mobility management entity；
Wherein, the switching request response and conversion handoff response carry the target BS
Group call resource information.
Preferably, in step E, by source cluster enhancing mobility management entity according to
Conversion handoff response generation switching command, and it is sent to the source base station；
Wherein, the switching command and reconfiguration message carry the group of the target BS and exhale
Resource information.
Preferably, the conversion handoff response passes to the source cluster core net by transparent box.
Switching system, the system bag are exhaled the invention also discloses a kind of group across cluster core net
Include terminal, source base station, target BS source cluster core net, target cluster core net and group master
Control cluster core net；
The terminal exhales information for measuring and reporting its group for hearing；
The source base station is used to receiving described group exhales information, and exhales the information decision to be according to described group
It is no to switch over, if desired switch over, then the source base station is additionally operable to the source cluster core
Heart net sends first and prepares handover request, and the source cluster core net is used for accurate according to described first
Standby handover request generation conversion handover request is simultaneously sent to the target cluster core net；
The target cluster core net is used for according to the conversion handover request to described group of master control collection
Group's core net sends handover information, wherein the handover information is used to notify described group of master control cluster
Core net has terminal to be needed to carry out group to exhale switching；
Described group of master control cluster core net is used to control the target cluster according to the handover information
Core net carries out group and exhales enlarging, and after the completion of group exhales enlarging the target cluster core net to institute
State source cluster core net and send conversion handoff response；
The source cluster core net is additionally operable to the conversion handoff response generation switching command, concurrently
Give the source base station；The source base station is additionally operable to be matched somebody with somebody again according to the generation switching command generation
Message is put, and is sent to terminal, the terminal is additionally operable to be provided according to the reconfiguration message
Source configures, and accesses the target BS.
Preferably, the source cluster core net includes that source cluster strengthens mobility management entity, institute
State target cluster core net strengthens mobility management entity including target cluster；
The source cluster enhancing mobility management entity is used to receive the source base station sends described first
Prepare handover request；And the source cluster enhancing mobility management entity is additionally operable to according to described
First prepares handover request generates the conversion handover request, and the conversion handover request is sent out
Give the target cluster enhancing mobility management entity.
Preferably, the target cluster core net also includes target SCC, described group of master control cluster
Core net includes group master control SCC, and the terminal includes target cluster enhancing home signature user clothes
Business device；
The target cluster enhancing mobility management entity is additionally operable to judge currently with the presence or absence of group
Exhale, when being exhaled in the absence of group, the target cluster strengthens mobility management entity to the target
SCC sends the first handover information；
The target SCC is used to exhale mark to be used to target cluster enhancing ownership signing according to group
Family server sends Address requests；The target cluster enhancing home signature user server is used for
The address of the described group of group master control SCC of master control cluster core net is sent according to the Address requests
To the target SCC；
The target SCC is additionally operable to the second handover information according to the described group of address of master control SCC
It is sent to described group of master control SCC；
Wherein, the handover information includes first handover information and the second handover information,
Described group is exhaled mark to be carried on the handover information, the first preparation handover request and conversion switching
In request.
Preferably, described group of master control SCC is additionally operable to exhale enlarging according to the second handover information generation group
Information, and exhale enlarging information to be sent to the target SCC by described group, by the target SCC
Exhale enlarging information to carry out group according to described group and exhale enlarging；
Group is exhaled after the completion of enlarging, and the target cluster enhancing mobility management entity is additionally operable to institute
State target BS and send the second preparation handover request；
The target BS is additionally operable to prepare handover request generation handover request sound according to described second
The target cluster enhancing mobility management entity and should be sent to；
The target cluster enhancing mobility management entity is additionally operable to according to the switching request response
The conversion handoff response is generated, and is sent to the source cluster enhancing mobility management entity；
Wherein, the switching request response and conversion handoff response carry the group of the base station
Exhale resource information.
Preferably, the source cluster enhancing mobility management entity is additionally operable to be cut according to the conversion
Response generation switching command is changed, and is sent to the source base station；
Wherein, the switching command and reconfiguration message carry the group of the target BS and exhale
Resource information.
Changing method and system are exhaled the invention provides a kind of group across cluster core net, the present invention
Exhale information to generate first according to the group that terminal is uploaded by source base station and prepare handover request, by source cluster
Core net is according to the first preparation handover request generation conversion handover request and is sent to object set group's core
Heart net, target cluster core net sends to group master control cluster core net according to conversion handover request and cuts
Information is changed, group master control cluster core net is entered according to the handover information control targe cluster core net
Row group exhales enlarging.Group is exhaled after the completion of enlarging, and target cluster core net sends to source cluster core net
Conversion handoff response, source cluster core net is concurrent according to conversion handoff response control source base station generation
Send reconfiguration message to corresponding terminal, last terminal carries out resource distribution according to reconfiguration message,
And access target BS.The present invention carries out group and exhales enlarging and group to exhale in advance in target cluster core net
Resource allocation, therefore can immediately answer group and exhale information after terminal accesses target BS, it is cut
Transsexual energy can reach with public network identical handover delay, realize the seamless switching that group is exhaled.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below
The accompanying drawing to be used needed for embodiment or description of the prior art will be briefly described, show and
Easy insight, drawings in the following description are only some embodiments of the present invention, for this area
For those of ordinary skill, on the premise of not paying creative work, can also be according to these
Accompanying drawing obtains other accompanying drawings.
Fig. 1 is that the group across cluster core net of a preferred embodiment of the invention exhales changing method
Flow chart；
Fig. 2 is that the group across cluster core net of another preferred embodiment of the invention exhales switching side
The flow chart of method.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.Following examples
For illustrating the present invention, but can not be used for limiting the scope of the present invention.
A kind of group across cluster core net exhales changing method, as shown in figure 1, methods described includes
Following steps：
A, terminal measure and report its group for hearing and exhale information to source base station；
B, the source base station receive described group and exhale information, exhale whether information decision is entered according to described group
Row is but changed, and is if desired switched over, then the source base station sends the first standard to source cluster core net
Standby handover request, the source cluster core net prepares handover request generation conversion according to described first
Handover request, and be sent to and give target cluster core net；
C, the target cluster core net are according to the conversion handover request to a group master control cluster core
Net sends handover information, wherein the handover information is used to notify described group of master control cluster core net
There is terminal needs to carry out group to exhale switching；Preferably, the conversion handoff response passes through transparent box
Pass to the source cluster core net；
D, described group of master control cluster core net control the target cluster core according to the handover information
Heart net carries out group and exhales enlarging, and after the completion of group exhales enlarging the target cluster core net to described
Source cluster core net sends conversion handoff response；
E, the source cluster core net generate switching command according to the conversion handoff response, concurrently
Give the source base station；The source base station generates reconfiguration message according to the generation switching command,
And terminal is sent to, the terminal carries out resource distribution according to the reconfiguration message, and accesses
The target BS.
The above method when thering is terminal to need to carry out cluster core net to switch, in target cluster core
Net carries out group and exhales enlarging and group call resource to distribute in advance, therefore can after terminal accesses target BS
Exhale information to answer group immediately, its performance of handoffs can reach with public network identical handover delay,
Realize the seamless switching that group is exhaled.
Further, in the step B, the source cluster enhancing movement of the source cluster core net
Property management entity receive that the source base station sends described first prepare handover request, it is and described
Source cluster enhancing mobility management entity prepares handover request and generates the conversion according to described first
Handover request, and the conversion handover request is sent to the target of the target cluster core net
Cluster strengthens mobility management entity.
Further, step C is comprised the following steps：
C1, target cluster enhancing mobility management entity judge currently to be exhaled with the presence or absence of group,
When being exhaled in the absence of group, the target cluster strengthens mobility management entity to the target cluster
The target SCC of core net sends the first handover information；
C2, the target SCC exhale target cluster enhancing ownership of the mark to the terminal according to group
Assigned user server sends Address requests, and the target cluster strengthens home signature user service
Device sends out the address of the described group of group master control SCC of master control cluster core net according to the Address requests
Give the target SCC；
C3, the target SCC are according to the described group of address of master control SCC by the second handover information
It is sent to described group of master control SCC；
Wherein, the handover information includes first handover information and the second handover information,
Described group is exhaled mark to be carried on the handover information, the first preparation handover request and conversion switching
In request.Group exhales mark to exhale information corresponding to the group that present terminal is being answered, and letter is exhaled according to group
Group number information can find a group address of master control SCC in breath, then send the second handover information
To described group of master control SCC.
Further, step D is comprised the following steps：
D1, described group of master control SCC exhale enlarging information according to the second handover information generation group, and will
Described group is exhaled enlarging information to be sent to the target SCC, by the target SCC according to described group
Exhale enlarging information to carry out group and exhale enlarging；
D2, group are exhaled after the completion of enlarging, and the target cluster strengthens mobility management entity to target
Base station sends second and prepares handover request；
D3, the target BS prepare handover request generation switching request response according to described second
And it is sent to the target cluster enhancing mobility management entity；
D4, target cluster enhancing mobility management entity are given birth to according to the switching request response
Into the conversion handoff response, and it is sent to the source cluster enhancing mobility management entity；
Wherein, the switching request response and conversion handoff response carry the target cluster
The group call resource information of network or target BS.Wherein target cluster network include target BS and
Target cluster core net.
Further, in step E, mobility management entity is strengthened according to institute by the source cluster
Conversion handoff response generation switching command is stated, and is sent to the source base station；
Wherein, the switching command and reconfiguration message carry the group of the target BS and exhale
Resource information.
The present invention carries what present terminal was being answered by the expanded definition between many cluster core nets
Group exhales information, and carries out group call resource distribution in advance in target cluster core-network side in switching,
Group can immediately being answered after terminal accesses target cluster core net and exhaling information, performance of handoffs can be with
Reach with public network identical handover delay, realize the seamless switching that group is exhaled.
There is a kind of group across cluster core net corresponding to the above method and exhale switching system, the system
System include terminal, source base station, target BS, source cluster core net, target cluster core net with
And group master control cluster core net；
The terminal exhales information for measuring and reporting its group for hearing；
The source base station is used to receiving described group exhales information, and exhales the information decision to be according to described group
It is no to switch over, if desired switch over, then the source base station is additionally operable to the source cluster core
Heart net sends first and prepares handover request, and the source cluster core net is used for accurate according to described first
Standby handover request generation conversion handover request is simultaneously sent to the target cluster core net；
The target cluster core net is used for according to the conversion handover request to described group of master control collection
Group's core net sends handover information, wherein the handover information is used to notify described group of master control cluster
Core net has terminal to be needed to carry out group to exhale switching；
Described group of master control cluster core net is used to control the target cluster according to the handover information
Core net carries out group and exhales enlarging, and after the completion of group exhales enlarging the target cluster core net to institute
State source cluster core net and send conversion handoff response；
The source cluster core net is additionally operable to the conversion handoff response generation switching command, concurrently
Give the source base station；The source base station is additionally operable to be matched somebody with somebody again according to the generation switching command generation
Message is put, and is sent to terminal, the terminal is additionally operable to be provided according to the reconfiguration message
Source configures, and accesses the target BS.
Further, the source cluster core net includes that source cluster strengthens mobility management entity,
The target cluster core net includes that target cluster strengthens mobility management entity；
The source cluster enhancing mobility management entity is used to receive the described of the source base station transmission
First prepares handover request, and source cluster enhancing mobility management entity is additionally operable to basis
Described first prepares handover request generates the conversion handover request, and please by the conversion switching
Ask and be sent to the target cluster enhancing mobility management entity.
Further, the target cluster core net also includes target SCC, described group of master control collection
Group's core net includes group master control SCC, and the terminal includes that target cluster strengthens home signature user
Server；
The target cluster enhancing mobility management entity is additionally operable to judge currently with the presence or absence of group
Exhale, when being exhaled in the absence of group, the target cluster strengthens mobility management entity to the target
SCC sends the first handover information；
The target SCC is used to exhale mark to be used to target cluster enhancing ownership signing according to group
Family server sends Address requests；The target cluster enhancing home signature user server is used for
The address of the described group of group master control SCC of master control cluster core net is sent according to the Address requests
To the target SCC；
The target SCC is additionally operable to the second handover information according to the described group of address of master control SCC
It is sent to described group of master control SCC；
Wherein, the handover information includes first handover information and the second handover information,
Described group is exhaled mark to be carried on the handover information, the first preparation handover request and conversion switching
In request.
Further, described group of master control SCC is additionally operable to exhale expansion according to the second handover information generation group
Information is built, and exhales enlarging information to be sent to the target SCC by described group, by the target SCC
Exhale enlarging information to carry out group according to described group and exhale enlarging；Group is exhaled after the completion of enlarging, the object set
Group's enhancing mobility management entity is additionally operable to please to target BS transmission the second preparation switching
Ask；The target BS is additionally operable to prepare handover request generation handover request sound according to described second
The target cluster enhancing mobility management entity and should be sent to；The target cluster enhancing is moved
Mobility management entity is additionally operable to generate the conversion handoff response according to the switching request response,
And it is sent to the source cluster enhancing mobility management entity；
Wherein, the switching request response and conversion handoff response carry the target BS
Group call resource information.
Further, the source cluster enhancing mobility management entity is additionally operable to according to the conversion
Handoff response generates switching command, and is sent to the source base station；Wherein, the switching command
And reconfiguration message carries the group call resource information of the target BS.
Because said system realizes that the step of group exhales switching is same as the above-mentioned method, therefore no longer
System is repeated.
The method of the present invention is described in detail below by another embodiment.
As shown in Fig. 2 the method for the present embodiment is comprised the following steps：
1 terminal reports the current group answered to exhale information in the measurements.
2 source base stations are that source eNB switches over decision-making, by the handover Required of S1 interfaces
Message (preparing handover request equivalent to above-mentioned first) strengthens mobility management entity to source cluster,
That is source eMME sends handover request, and the current group number information answered is carried in message.
3 source eMME by Forward Relocation Request message, (cut by i.e. above-mentioned conversion
Change request) notify that target cluster enhancing mobility management entity, i.e. target eMME are switched over
Resource prepares, meanwhile, carry the current group answered and exhale mark or exhale group information.
In the case that 4 target eMME are exhaled at no group, message Message is sent to target SCC
(i.e. the first handover information) notifies that target SCC present terminals move to current cluster core net (i.e.
Target cluster core net), and need extend certain group exhale.
5 target SCC exhale mark according to group number information or group, return to the target cluster enhancing of terminal
Category assigned user server, the i.e. address of UE-eHSS requests group master control SCC.The object set
Group's enhancing home signature user server is according to the Address requests by described group of master control cluster core
The address of the group master control SCC of net is sent to the target SCC.
6 target SCC send Message message (the second handover information) and lead to group master control SCC
Know that a group master control SCC carries out group and exhales enlarging.
7 groups of master control SCC notify that target SCC carries out group and exhales enlarging, and target SCC completion groups are exhaled
Enlarging process.
8 target eMME proceed S1 handoff procedures, notify target BS, i.e. target eNB
Switch over resource and prepare (Handover Request), target eNB is carried in transparent transmission box and cut
Public network resources and group call resource that commutation is closed, handover Request are passed through from target eNB
Acknowledge message (i.e. switching request response) is sent to target eMME, from target
EMME is by Forward Relocation Response (i.e. switching request response) message to source
EMME, source eMME arrive source eNB by Handover Command (i.e. switching command),
Source eNB is by RRC reallocation messages to terminal UE.
9 source base stations, i.e. source eNB notify that terminal UE carries out target side resource distribution, and UE is accessed
While target side, completion group exhales reception resource distribution, can immediately carry out group and exhale data receiver.
Source SGW is the Serving GateWay of source cluster core net in Fig. 2；Target SGW is target
The Serving GateWay of cluster core net, source SCC are the SCC of source cluster core net；PGW
It is PDN GateWay；Group master control eHSS is the cluster enhancing ownership of group master control cluster core net
Assigned user server.
When the present invention defines terminal and answers group in connected state ECM-CONNECTED and exhale, from
One cluster core net moves to the service range of another cluster core net, then source core net exists
The group that carried terminal is being answered in Forward Relocation Request message exhales identification information,
Target cluster core net after message is received, the cluster core net of group of notifications master control immediately, currently
A UE is moved in this cluster core net during group is exhaled, and notifies current by group master control cluster core net
Cluster core net (i.e. target cluster core net) carries out group and exhales enlarging, and target cluster core net exists
Group is exhaled after enlarging, notifies that target eNB switches over resource preparation, and target eNB is provided in switching
E-RAB is carried simultaneously in source preparation response message (i.e. switching request response or conversion handoff response)
(RAB of evolution) and T-RAB (Trunking-RAB, cluster wireless is carried)
Configuration information, notify to reconfigure to source eNB, source eNB by RRC by transparent transmission box
Cheng Tongzhi terminals.Terminal has reconfigured group while target eNB is reconfigured to, also and has exhaled money
Source, can immediately answer group and exhale information, when its performance of handoffs can reach the switching of public network identical
Prolong.
Embodiment of above is merely to illustrate the present invention, rather than limitation of the present invention.Although ginseng
The present invention has been described in detail according to embodiment, it will be understood by those within the art that,
Various combinations, modification or equivalent are carried out to technical scheme, without departure from this
The spirit and scope of inventive technique scheme, all should cover in the middle of scope of the presently claimed invention.
Claims (11)
1. a kind of group across cluster core net exhales changing method, it is characterised in that methods described bag
Include following steps：
A, terminal measure and report its group for hearing and exhale information to source base station；
B, the source base station receive described group and exhale information, exhale whether information decision is entered according to described group
Row switching, if desired switches over, then the source base station sends the first standard to source cluster core net
Standby handover request, the source cluster core net prepares handover request generation conversion according to described first
Handover request, and it is sent to object set group's core net；
C, the target cluster core net are according to the conversion handover request to a group master control cluster core
Net sends handover information, wherein the handover information is used to notify described group of master control cluster core net
There is terminal needs to carry out group to exhale switching；
D, described group of master control cluster core net control the target cluster core according to the handover information
Heart net carries out group and exhales enlarging, and after the completion of group exhales enlarging, the target cluster core net is to institute
State source cluster core net and send conversion handoff response；
E, the source cluster core net generate switching command according to the conversion handoff response, concurrently
Give the source base station；The source base station generates reconfiguration message according to the generation switching command,
And terminal is sent to, the terminal carries out resource distribution according to the reconfiguration message, and accesses
The target BS.
2. method according to claim 1, it is characterised in that in the step B,
The source cluster enhancing mobility management entity of the source cluster core net receives the source base station
Described first for sending prepares handover request, and source cluster enhancing mobility management entity
Prepare handover request according to described first and generate the conversion handover request, and the conversion is cut
Change the target cluster enhancing mobility management entity that request is sent to the target cluster core net.
3. method according to claim 2, it is characterised in that step C includes following step
Suddenly：
The target cluster enhancing mobility management entity judges currently to be exhaled with the presence or absence of group, not
When there is group and exhaling, the target cluster strengthens mobility management entity to the target cluster core
The target SCC of net sends the first handover information；
The target SCC exhales target cluster enhancing ownership signing of the mark to the terminal according to group
Client server sends Address requests, and the target cluster strengthens home signature user server root
The address of the described group of group master control SCC of master control cluster core net is sent to according to the Address requests
The target SCC；
Be sent to for the second handover information according to the described group of address of master control SCC by the target SCC
Described group of master control SCC；
Wherein, the handover information includes first handover information and the second handover information,
Described group is exhaled mark to be carried on the handover information, the first preparation handover request and conversion switching
In request.
4. method according to claim 3, it is characterised in that step D includes following step
Suddenly：
Described group of master control SCC exhales enlarging information according to the second handover information generation group, and will be described
Group exhales enlarging information to be sent to the target SCC, and expansion is exhaled according to described group by the target SCC
The information of building carries out group and exhales enlarging；
Group is exhaled after the completion of enlarging, and the target cluster strengthens mobility management entity to target BS
Send second and prepare handover request；
It is concurrent that the target BS prepares handover request generation switching request response according to described second
Give the target cluster enhancing mobility management entity；
The target cluster enhancing mobility management entity generates institute according to the switching request response
Conversion handoff response is stated, and is sent to the source cluster enhancing mobility management entity；
Wherein, the switching request response and conversion handoff response carry the target BS
Group call resource information.
5. method according to claim 4, it is characterised in that in step E, by described
Source cluster enhancing mobility management entity generates switching command according to the conversion handoff response, and
It is sent to the source base station；
Wherein, the switching command and reconfiguration message carry the group of the target BS and exhale
Resource information.
6. method according to claim 1, it is characterised in that the conversion handoff response
The source cluster core net is passed to by transparent box.
7. a kind of group across cluster core net exhales switching system, it is characterised in that the system bag
Include terminal, source base station, target BS, source cluster core net, target cluster core net and group
Master control cluster core net；
The terminal exhales information for measuring and reporting its group for hearing；
The source base station is used to receiving described group exhales information, and exhales the information decision to be according to described group
It is no to switch over, if desired switch over, then the source base station is additionally operable to the source cluster core
Heart net sends first and prepares handover request, and the source cluster core net is used for accurate according to described first
Standby handover request generation conversion handover request is simultaneously sent to the target cluster core net；
The target cluster core net is used for according to the conversion handover request to described group of master control collection
Group's core net sends handover information, wherein the handover information is used to notify described group of master control cluster
Core net has terminal to be needed to carry out group to exhale switching；
Described group of master control cluster core net is used to control the target cluster according to the handover information
Core net carries out group and exhales enlarging, and after the completion of group exhales enlarging the target cluster core net to institute
State source cluster core net and send conversion handoff response；
The source cluster core net is additionally operable to the conversion handoff response generation switching command, concurrently
Give the source base station；The source base station is additionally operable to be matched somebody with somebody again according to the generation switching command generation
Message is put, and is sent to terminal, the terminal is additionally operable to be provided according to the reconfiguration message
Source configures, and accesses the target BS.
8. system according to claim 7, it is characterised in that the source cluster core net
Strengthen mobility management entity including source cluster, the target cluster core net includes target cluster
Enhancing mobility management entity；
The source cluster enhancing mobility management entity is used to receive the source base station sends described first
Prepare handover request；And the source cluster enhancing mobility management entity is additionally operable to according to described
First prepares handover request generates the conversion handover request, and the conversion handover request is sent out
Give the target cluster enhancing mobility management entity.
9. system according to claim 8, it is characterised in that the target cluster core
Net also includes target SCC, and described group of master control cluster core net includes group master control SCC, the end
End includes that target cluster strengthens home signature user server；
The target cluster enhancing mobility management entity is additionally operable to judge currently with the presence or absence of group
Exhale, when being exhaled in the absence of group, the target cluster strengthens mobility management entity to the target
SCC sends the first handover information；
The target SCC is used to exhale mark to be used to target cluster enhancing ownership signing according to group
Family server sends Address requests；The target cluster enhancing home signature user server is used for
The address of the described group of group master control SCC of master control cluster core net is sent according to the Address requests
To the target SCC；
The target SCC is additionally operable to the second handover information according to the described group of address of master control SCC
It is sent to described group of master control SCC；
Wherein, the handover information includes first handover information and the second handover information,
Described group is exhaled mark to be carried on the handover information, the first preparation handover request and conversion switching
In request.
10. system according to claim 9, it is characterised in that
Described group of master control SCC is additionally operable to exhale enlarging information according to the second handover information generation group, and
Enlarging information is exhaled to be sent to the target SCC by described group, by the target SCC according to
Group is exhaled enlarging information to carry out group and exhales enlarging；
Group is exhaled after the completion of enlarging, and the target cluster enhancing mobility management entity is additionally operable to institute
State target BS and send the second preparation handover request；
The target BS is additionally operable to prepare handover request generation handover request sound according to described second
The target cluster enhancing mobility management entity and should be sent to；
The target cluster enhancing mobility management entity is additionally operable to according to the switching request response
The conversion handoff response is generated, and is sent to the source cluster enhancing mobility management entity；
Wherein, the switching request response and conversion handoff response carry the target BS
Group call resource information.
11. systems according to claim 10, it is characterised in that the source cluster enhancing
Mobility management entity is additionally operable to according to the conversion handoff response generation switching command, and is sent
To the source base station；
Wherein, the switching command and reconfiguration message carry the group of the target BS and exhale
Resource information.
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