CN102905331B - The method and system that packet switch Mobile Access Network triggering media redirect - Google Patents
The method and system that packet switch Mobile Access Network triggering media redirect Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
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Abstract
The invention discloses the method that a kind of packet switch Mobile Access Network triggering media redirect, including：Network control system NCS request target media exchange systems MSS creates the first bearer connection for client terminal system UTS；The target MSS sends IP information to service adaptation function SA；The media data from first bearer connection received is transmitted to the UTS by source MSS；Alternatively, the media data for being sent to the UTS received is transmitted to the target MSS by source MSS or radio node system RNS by first bearer connection.The present invention discloses the system that a kind of packet switch Mobile Access Network triggering media for realizing the above method redirect.The present invention in time can relocate UTS, access route so as to trigger the UTS in optimization PS Mobile Access Networks in time, will not cause the detour of multimedia service stream.
Description
Technical field
The present invention relates to redirecting technique, more particularly to the side that a kind of packet switch Mobile Access Network triggering media redirect
Method and system.
Background technology
Packet (PS, Packet Switching) Mobile Access Network includes Long Term Evolution (LTE, Long Term
Evolution) network, Universal Mobile Communication System (UMTS, Universal Mobile Telecommunications
System) network, GSM EDGE Radio Access Networks (GERAN, GSM EDGE radio access network), code division is more
Location (CDMA, Code Division Multiple Access) network etc., provides Internet protocol (IP, Internet to the user
Protocol) access capability, so that user accesses Internet network.
PS Mobile Access Networks mainly include client terminal system (UTS, User Terminal System), radio node system
Unite (RNS, Radio Node System), network control system (NCS, Network Control System) and exchange of media
The network elements such as system (MSS, Media Switch System), it is also possible to including strategy distribution system (PDS, Policy
Dispatch System) etc..In order to carry the IP-based business of UTS, business network can set a corresponding service adaptation
Function (SA, Service Adapter) with access net interact, such as in Internet network network address translation (NAT,
Network Address Transfer) equipment, in IP multimedia subsystem (IMS, IP Multimedia Sub-system)
Proxy call conversation control function entity (P-CSCF, Proxy Call Session Control Function) etc..Its
In, UTS is used for transmitting/receiving wireless information, and business is presented for user.RNS is used for transmitting/receiving wireless information, and is carried out with NCS and MSS
Interaction, enables NCS to interact signaling information with UTS, and enables MSS and UTS switched-media data, specifically, RNS can be sub-divided into
Control face entity and user entity.NCS is used to control RNS and MSS, to provide mobile management etc. to the user.MSS is used to carry
For carrying (Bearer) to realize the exchange of media data.Some business or all business are directed to, MSS includes one or more levels
Exchange of media gateway (MSGW, Media Switch Gateway), so-called " level-one " refer to be directed to some business or all business
When, RNS need to only pass through a MSGW and can be achieved to exchange with the media data of IP network, and so-called " multistage " refers to be directed to some industry
When business or all business, RNS need to pass through multiple (two or more) MSGW and just can be achieved to exchange with the media data of IP network.For
Using the PS Mobile Access Networks of multilevel medium exchange gateway, IP network interaction capabilities are provided for some business or all business
Exchange of media gateway is known as IGW (Internet Gateway), for example, in LTE network public data network gateway (PDN-GW,
Public Data Network Gateway) or UMTS network in Gateway GPRS Support Node (GGSN, Gateway GPRS
Support Node), other exchange of media gateways provide switchover capability, are known as TGW (Transfer Gateway), such as LTE
Gateway (SGW, Service Gateway) in network, TGW can be independent community or a function of NCS
SGSN in module, such as UMTS network.TGW for business 2 is likely to be for the IGW of business 1, vice versa.PDS is used
Generation strategy and MSS is distributed in receiving the business information of (pass through RNS, NCS and MSS transmit) from UTS or SA, and according to this,
To establish suitable carrying.Therefore, when disposing PDS, PDEA (Policy are acted on behalf of in the execution just there is provided PDS in MSS
Dispatch Execution Agent), PDEA can be the independent functional entities in MSS, with the TGW and/or IGW in MSS
Logic function in signaling or TGW or IGW is transmitted by interface.
Fig. 1 is the configuration diagram of existing PS Mobile Access Networks, as shown in Figure 1, S102 is wireless between UTS and RNS
Interface, wireless messages are sent for wireless messages of the UTS receptions from RNS and to RNS；S104 is the interface of RNS and NCS,
Signaling is sent for signaling of the RNS receptions from NCS and to NCS, if RNS points are user plane and chain of command, by its control
Realize the interface in face processed；S106 is the interface of RNS and MSS, is sent for media data of the RNS receptions from MSS and to MSS
Media data, if RNS points are user plane and chain of command, the interface is realized by its user plane；S108 is connecing for NCS and MSS
Mouthful, the behavior of MSS is controlled by signaling for NCS；S110 is when deploying PDS, the interface of PDEA and PDS in MSS, to be used for
Receive the strategy of PDS distributions and to PDS Requests dispatching strategies designeds；S112 is the interface of SA and PDS, for SA when deploying PDS
Business information and PDS, which are sent, to PDS notifies access net relevant information to SA；S114 be MSS and SA interface, for MSS with
SA exchanges information, or UTS exchanges information by MSS with SA.
In existing PS Mobile Access Networks, after UTS accesses PS Mobile Access Networks, PS Mobile Access Networks can select MSS
Some IGW distributes IP address for it, and when UTS carries out exchange of media class business, which provides exchange of media for the user always
Service, even if UTS is moved to far place, PS Mobile Access Networks will not reselect one nearby in the locality of UTS
IGW, this can cause the serious detour of the media path in PS Mobile Access Networks so that PS Mobile Access Networks provide business
Performance be affected, such as postpone it is longer.
The content of the invention
In view of this, it is a primary object of the present invention to provide a kind of packet switch Mobile Access Network triggering media to redirect
Method and system, by being redirected to UTS in PS Mobile Access Networks, suitable MSS, triggering optimization multimedia are chosen for UTS
The route of business.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
A kind of method that packet switch Mobile Access Network triggering media redirect, including：
NCS request targets MSS creates the first bearer connection for UTS；
The target MSS sends IP information to SA；
The media data from first bearer connection received is transmitted to the UTS by source MSS；Alternatively, source MSS
Or the media data for being sent to the UTS received is transmitted to the target MSS by RNS by first bearer connection.
Preferably, media connection of first bearer connection between the target MSS and the source MSS.
Preferably, media connection of first bearer connection between the target MSS and RNS.
Preferably, before the NCS request targets MSS creates the first bearer connection for UTS, the method further includes：
The NCS receives handover request.
Preferably, the method further includes：
The NCS performs handover operation.
Preferably, the method further includes：
The NCS asks the target MSS to create the second bearer connection for the UTS, the target MSS connections described the
Two bearer connections and first bearer connection.
Preferably, the method further includes：
The NCS asks the source MSS to create the 3rd bearer connection with RNS, and the source MSS comes from institute by what is received
The media data for stating the 3rd bearer connection is transmitted to the target MSS by first bearer connection.
Preferably, the NCS request targets MSS is that the first bearer connection of UTS establishments is：
The NCS obtains the contextual information of the UTS, and is sent to the target MSS and create connection message, wherein,
The contextual information of the UTS is carried in the establishment connection message, the contextual information includes at least following information
It is at least one：
The identification information of UTS and the IP information of UTS.
Preferably, the target MSS is to SA transmissions IP information：
The target MSS sends IP information directly or by strategy distribution system PDS to the SA.
Preferably, before the NCS request targets MSS creates the first bearer connection for UTS, the method further includes：
The NCS determines the mesh according to the on-position of the UTS, or the situation of source MSS, or the request of the UTS
Mark MSS.
The system that a kind of packet switch Mobile Access Network triggering media redirect, includes the NCS of the PS Mobile Access Networks,
UTS, RNS or source MSS, target MSS, and the SA of service network, wherein,
NCS, the first bearer connection is created for request target MSS for UTS；
Target MSS, for sending IP information to service adaptation function SA；
Source MSS, for the media data from first bearer connection received to be transmitted to the UTS；Alternatively,
The media data for being sent to the UTS received is transmitted to the target MSS by first bearer connection；
RNS, for the media data of the UTS received to be transmitted to the target by first bearer connection
MSS。
Preferably, media connection of first bearer connection between the target MSS and the source MSS；
Alternatively, media connection of first bearer connection between the target MSS and RNS.
Preferably, before the NCS request targets MSS creates the first bearer connection for UTS, the NCS is further used for,
Receive handover request.
Preferably, the NCS is further used for, and performs handover operation.
Preferably, the NCS is further used for, and asks the target MSS to create the second bearer connection for the UTS；
The target MSS is further used for, and connects second bearer connection and first bearer connection.
Preferably, the NCS is further used for, and asks the source MSS to create the 3rd bearer connection with RNS, the source
The media data from the 3rd bearer connection received is transmitted to the target by MSS by first bearer connection
MSS。
Preferably, the NCS is further used for, and obtains the contextual information of the UTS, and send to the target MSS
Connection message is created, wherein, it is described to create the contextual information that the UTS is carried in connection message, the contextual information
Including at least at least one of following information：
The identification information of UTS and the IP information of UTS.
Preferably, the target MSS is further used for, and IP is sent to the SA directly or by strategy distribution system PDS
Information.
Preferably, before the NCS request targets MSS creates the first bearer connection for UTS, the NCS is further used for,
According to the on-position of the UTS, or the situation of source MSS, or the request of the UTS, the target MSS is determined.
In the present invention, NCS request target media exchange systems MSS creates the first bearer connection for client terminal system UTS；
Target MSS sends IP information to SA；The media data from first bearer connection received is transmitted to described by source MSS
UTS；Alternatively, source MSS or radio node system RNS connects the media data of the UTS received by the described first carrying
Switch through and issue the target MSS.Media connection of above-mentioned first bearer connection between the target MSS and the source MSS；Or
Media connection between the target MSS and RNS.The present invention in time can relocate UTS, so as to trigger optimization PS in time
UTS accesses route in Mobile Access Network, will not cause the detour of multimedia service stream.
Brief description of the drawings
Fig. 1 is the configuration diagram of existing PS Mobile Access Networks；
Fig. 2 is that the packet switch Mobile Access Network of the embodiment of the present invention one triggers the flow chart for the method that media redirect；
Fig. 3 is that the packet switch Mobile Access Network of the embodiment of the present invention two triggers the flow chart for the method that media redirect；
Fig. 4 is that the packet switch Mobile Access Network of the embodiment of the present invention three triggers the flow chart for the method that media redirect；
Fig. 5 is that the packet switch Mobile Access Network of the embodiment of the present invention four triggers the flow chart for the method that media redirect；
Fig. 6 is that the packet switch Mobile Access Network of the embodiment of the present invention five triggers the flow chart for the method that media redirect；
Fig. 7 is that the routing update of the embodiment of the present invention notifies flow chart；
Fig. 8 is another flow chart that the routing update of the embodiment of the present invention notifies.
Embodiment
The present invention basic thought be：NCS request targets MSS creates the first bearer connection for client terminal system UTS；Mesh
Mark MSS and send IP information to SA；The media data from first bearer connection received is transmitted to described by source MSS
UTS；Alternatively, source MSS or radio node system RNS connects the media data of the UTS received by the described first carrying
Switch through and issue the target MSS.
To make the purpose of the present invention, technical solution and advantage are more clearly understood, by the following examples and referring to the drawings, right
The present invention is further described.
Fig. 2 is that the packet switch Mobile Access Network of the embodiment of the present invention one triggers the flow chart for the method that media redirect,
As shown in Fig. 2, this example is described when UTS carries out exchange of media class business, the situation that media redirect operation is initiated, wherein
RNS1 is source radio node system, and NCS1 is source network control system, and MSS1 is source media exchange system, and RNS2 is Target Wireless
Node system, NCS2 are objective network control system, and MSS2 is target medium exchange system, this exemplary packet switch movement connects
Networking reorientation method mainly includes the following steps that：
Step 200, before UTS initiation business or in execution business procedure, NCS1 obtains UTS contextual informations, such as pin
IP information (can be the forms such as IPv4 addresses, IPv6 addresses or IPv6 prefixes, it is understood that there may be multiple) and/or the world to UTS
Mobile station identification (IMSI, International Mobile Subscriber Identification Number), can also wrap
The address information of the SA used containing the business on UTS, such as the domain name of SA, or the IP address of SA, the connection that can also include UTS are believed
Breath etc..
UTS contextual informations can also passively (inquiry for receiving NCS) or on one's own initiative by one of UTS, SA and MSS or
Combination either directly or indirectly (is transmitted, for example UTS passes to NCS by MSS, or SA passes through PDS and MSS by other network elements
Pass to NCS) NCS is supplied to, such as it can pass to NCS by one or more signaling messages.
If not having routing update set-up procedure, NCS1 may need some parameters of static configuration, such as the address of SA
Information.
Step 200 is optional step.
Step 201, UTS sends measurement report and sends Measurement Report message to RNS1, such as to RNS1, disappears
Breath includes the information such as the signal strength for the peripheral cell that UTS is measured；
Step 202, RNS1 determines to perform switching according to measurement report information, then sends hand off signaling to NCS1, such as
Send Handover Required message；
Step 203, if NCS1 have selected new NCS2 and provide network control, NCS1 initiates switching forward behaviour to NCS2
Make, for example send Forward Relocation message, which carries UTS contextual informations, and UTS contextual informations are such as directed to
The IP information (there may be multiple) and/or International Mobile Subscriber Identity (IMSI, International Mobile of UTS
Subscriber Identification Number), the address information for the SA that the business on UTS uses is may also include, such as
The domain name of SA, or the IP address of SA, can also include link information of UTS etc.；
Step 204, if performing step 203, controlled entity NCS2, otherwise controlled entity is NCS1, and control is real
Body (the present embodiment NCS2) selects new MSS2 and sends to MSS2 to create connection message, for example sends Create Session
Request message, message can also carry the mark for creating forwarding connection, which can be received by the IGW of MSS2, if PS connects
Networking deploys PDS, then the message can also be received by the PDEA of MSS2, which carries UTS contextual informations；
Here, controlled entity selects new MSS2 to refer to the new IGW of control entity selection, and new TGW also may be selected.The present invention
In, new MSS is selected to reselect the IGW in MSS, or reselect IGW and part TGW, or reselect IGW and complete
Portion TGW.The MSS that the selection of following embodiments is new is also identical implication, is no longer illustrated one by one.
Step 205, MSS2 initiates routing update notification procedure to notify SA business according to the UTS contextual informations received
Route needs to update, and any of which notice SA business routes shown in specific usable Fig. 5 and Fig. 6 need to update, and SA leads to
New IP information etc., such as new IPv4 addresses, IPv6 addresses or IPv6 prefixes etc. can be obtained by crossing route update notification process,
So as to the route of renewable business；
Step 206, SA initiates distal end renewal process according to the new IP information of acquisition in service network；
Specific distal end renewal process is depending on service network, if service network is IP multimedia subsystem IMS (IP
Multi-media Sub-system) network, then distal end renewal process can send reINVITE (to invite) message again, newly
Address information can be carried by Contact (contact person) header fields of message and message body to notify distal end.
Step 207, after step 204, or after step 205, MSS2, which is returned, creates success message, for example sends
Create Session Response message, carries one or more link informations of MSS2, such as IP address, can also include
Port numbers and/or connection identifier information, pre-configured port numbers can be used when being free of port numbers in link information；Create
Session Response message can also decide whether to carry forwarding connection according to the mark of the establishment forwarding connection in step 204
Link information in MSS2, can not also adjudicate and forwarding is inserted into directly in Create Session Response message
The link information being connected in MSS2；
In this example, the forwarding established in step 207 connection is the first bearer connection, and other connection is second to hold
Carry connection.In this example, media connection of second bearer connection between RNS to target MSS.
Step 208, if step 207 asks to create forwarding without forwarding connection, controlled entity NCS2 is created to MSS2
Connection, for example send Create Indirect Data Forwarding Tunnel Request message to MSS2；
In this example, the forwarding connection created in step 208 is the first bearer connection.In this example, the first carrying connects
Connect and can also be created by step 204~207 with implicit.So-called first bearer connection, is primarily referred to as target MSS and source MSS
Between, and the media connection between target MSS and RNS.
Step 209, MSS2 is returned and created successfully, for example sends Create Indirect Data Forwarding
Tunnel Response message, the link information of the forwarding connection of MSS2 is carried in message；
Step 210, after controlled entity NCS2 receives establishment success message, notice RNS2 prepares switching, for example sends
Handover Request message, one or more link informations of MSS2 are carried in message；
Step 211, RNS2 prepares resource, including the wireless connection resource with UTS, and after being ready to complete, then notice control is real
Body NCS2 is ready to complete, for example sends Handover Request Acknowledge message, and the connection of RNS2 is carried in message
Information；
Step 212, if performing step 203, NCS2 sends forward response to NCS1, for example sends Forward
Relocation Response message, the link information of the forwarding connection of MSS2 is carried in message；
Step 213, NCS1 notifies MSS1 renewal connections, for example sends Create Indirect Data Forwarding
Tunnel Request message, the link information of the forwarding connection of MSS2 is carried in message；
Step 214, MSS1 is returned to NCS1 and is updated successfully, for example sends Create Indirect Data to NCS1
Forwarding Tunnel Response message；
Step 215, MSS1 starts forwarding capability, and the media data for issuing UTS received is transmitted to MSS2；
Forwarding connection can be IGW1 to the connection between IGW2, the connection between IGW1, TGW1 and IGW2, IGW1,
Connection between TGW2 and IGW2, the wherein connection between IGW1, TGW1, TGW2 and IGW2, IGW1, TGW1 belong to MSS1,
IGW2, TGW2 belong to MSS2, and TGW can be one or more.If media connection at this time 3 is not yet set up, MSS2 can
To store the media data received from forwarding connection, UTS is issued again after media connection 3 is set up, so as to subtract
Few business interruption time.
Step 216, NCS1 receives the forward response message of step 212 or step 211 is ready to complete message, NCS1 to
RNS1, which is sent, agrees to handover request, for example sends Handover Command message；
Step 217, RSN1 sends switching notice to UTS, for example sends Handover Command message；
Step 218, after UTS is modulated to Target cell, handoff completion message is sent to RNS2, for example send Handover
Complete message；
Step 219, RNS2 is sent completely notification message to controlled entity NCS2；
Step 220, controlled entity NCS2 is sent to MSS2 confirms success message, for example sends ModifyBearer
Request message, the link information of RNS2 is carried in message；
So far, new media connection 3 is set up, which connects the wireless connection for also including UTS to RNS2.
Step 221, SA have received the renewal completion message from service network, so that business datum is routed to new IP
In information, namely in the IP information of step 205 offer, which causes business datum to be routed to MSS2, and SA is received
The time point of the message is probably the random time point after step 206.
Specific distal end renewal complete process is depending on service network, if service network is IP multimedia subsystem IMS nets
Network, then renewal complete process in distal end can receive 200 OK message.
So far, new media connection 4 is set up, and UTS can connect 3 media that 4 compositions are connected with media by media
Path continues business with distal end.Since the establishment mode of media connection 4 is the prior art, the specific of its establishment is repeated no more
Mode.
Fig. 3 is that the packet switch Mobile Access Network of the embodiment of the present invention two triggers the flow chart for the method that media redirect,
As shown in figure 3, this example is described when UTS carries out exchange of media class business, the situation that media redirect operation is initiated, wherein
MSS1 is source media exchange system, and MSS2 is target medium exchange system, this exemplary packet switch Mobile Access Network redirects
Method mainly includes the following steps that：
Step 300~step 312, it is identical with step 200~step 212 of Fig. 2；
Step 313, alternatively, NCS1 notifies MSS1 renewal connections, for example sends Create Indirect Data
Forwarding Tunnel Request message, the link information of the forwarding connection of MSS2 is carried in message；
Step 314, MSS1 is returned to NCS1 and is updated successfully message, for example sends Create Indirect Data to NCS1
Forwarding Tunnel Response message, the link information of the forwarding connection of MSS1 is carried in message；
Step 315, MSS1 starts forwarding capability, and the media data received from the forwarding connection of MSS1 is transmitted to
MSS2；
Forwarding connection between MSS1 and MSS2 can be IGW1 to the connection between IGW2, between IGW1, TGW1 and IGW2
Connection, the connection between IGW1, TGW2 and IGW2, the connection between IGW1, TGW1, TGW2 and IGW2, wherein IGW1, TGW1
Belong to MSS1, IGW2, TGW2 belong to MSS2, and TGW can be one or more.
313~step 315 of above-mentioned steps is optional step.
Step 316, NCS1 receive step 312 forward response message or step 311 be ready to complete message after, NCS1
Sent to RNS1 and agree to handover request, for example send Handover Command message, if performing step 313~step
315, then the link information that the forwarding of message carrying MSS1 connects, the link information that otherwise forwarding of message carrying MSS2 connects；
In this example, the connection that is created between step 314 to step 316, is the 3rd bearer connection.In this example, the
Three bearer connections refer to RNS1 to MSS1.
Step 317, RNS1 starts forwarding capability, and the media data for being sent to UTS is transmitted to MSS1 or MSS2, if forwarding
To MSS1, then MSS1 relays to MSS2.If media connection at this time 3 is not yet set up, MSS2 can be stored from forwarding
The media data received in connection, issues UTS, during so as to reduce service disconnection again after media connection 3 is set up
Between.
Step 318~step 322, it is identical with the step 217 in Fig. 2~step 221.
So far, UTS can be connected the media path of 3 and 4 composition of media connection by media and distally continue business.
Fig. 4 is that the packet switch Mobile Access Network of the embodiment of the present invention three triggers the flow chart for the method that media redirect,
As shown in figure 4, this example is described when UTS carries out exchange of media class business, the situation that media redirect operation is initiated, wherein
RNS1 is source radio node system, and NCS1 is source network control system, and MSS1 is source media exchange system, and RNS2 is Target Wireless
Node system, NCS2 are objective network control system, and MSS2 is target medium exchange system, this exemplary packet switch movement connects
Networking reorientation method mainly includes the following steps that：
Step 400~step 402 is identical with the step 200 in Fig. 2~202；
Step 403, network performs handover operation according to existing handoff technique, and handoff procedure may reselect NCS2
As controlled entity, controlled entity is NCS2 by gravity treatment in the present embodiment；
By handover operation, media connection 3 is set up between MSS1 and RNS2.
Step 404, alternatively, controlled entity (the present embodiment NCS2) asks to create forwarding connection to MSS1, for example sends out
Send Create Indirect Data Forwarding Tunnel Request message；
Step 405, MSS1 is returned and created successfully, for example sends Create Indirect Data Forwarding
Tunnel Response message, the link information of the forwarding connection of MSS1 is carried in message；
Step 406, controlled entity NCS2 selects new MSS2 and sends to MSS2 to create connection message, for example sends
Create Session Request message, the message can be received by the IGW of MSS2, if PS access nets deploy PDS,
The message can also be received by the PDEA of MSS2, which carries UTS contextual informations, can also be carried and be created forwarding connection
Mark, if being not carried out step 404~step 405, also carries the contextual information of connection in above-mentioned message, including each
Link information, such as IP address, can also include port numbers and/or connection identifier information, can when being free of port numbers in link information
Using pre-configured port numbers, if performing step 404~step 405, the connection letter of the forwarding connection of MSS1 is also carried
Breath；
So-called controlled entity selects new MSS2 to refer to the new IGW of control entity selection, and new TGW also may be selected.
Step 407~step 408 is identical with the step 205 in Fig. 2~step 206；
Step 409, alternatively, after step 406, or after step 407, MSS2 is returned to NCS2 and created successfully, such as
Create Session Response message is sent, one or more link informations of MSS2, such as IP address is carried, may be used also
Comprising port numbers and/or connection identifier information, pre-configured port numbers, Create can be used when port numbers are free of in link information
Session Response message can also decide whether to carry forwarding connection according to the mark of the establishment forwarding connection in step 406
Link information in MSS2, can not also adjudicate and forwarding is inserted into directly in Create Session Response message
The link information being connected in MSS2；
In this example, the forwarding established in step 409 connection is the first bearer connection, and other connection is second to hold
Carry connection.In this example, media connection of second bearer connection between RNS to target MSS.
Step 410, it is identical with the step 221 in Fig. 2；
So far, new media connection 4 is set up.During step 409~step 410 performs, distally may
Being received by 2 transmission downstream media data of media connection and by MSS1, MSS1 can connect 3 by media and send UTS to, when
After distal end receives new information and have modified media data transfer destination, MSS2 will be received to be passed from new media connection 4
The downstream media data sent, MSS2 by from media connection 4 media data be transmitted to MSS1, if perform step 404~
Step 405, then the link information for the forwarding connection that purpose is MSS1 is forwarded, MSS1 passes through after receiving the media data that forwarding comes
Media connection 3 sends UTS to, therefore MSS1 is indeed achieved from media connection 2 and the media that are forwarded from media and connect 4
Data all send the function of UTS to by media connection 3.Forwarding connection can be IGW2 to the connection between IGW1, IGW2,
Connection between TGW2 and TGW1, IGW2 to the shape such as the connection between TGW1, the connection between IGW2, TGW2, IGW1 and TGW1
Formula, wherein IGW1, TGW1 belong to MSS1, and IGW2, TGW2 belong to MSS2, and TGW can be one or more.IGW2-TGW1 is this
Form shows that MSS1 and MSS2 shares TGW1, and the existing connection for UTS between TGW1 and RNS2.
Step 411, MSS2 is updated successfully after receiving the media data from media connection 4 to controlled entity NCS2 transmissions
Message, for example Modify Bearer Request message is sent, if being not carried out step 409, message carries the one of MSS2
A or multiple link informations；
Another kind is achieved in that SA sends renewal completion to MSS2, or by PDS after step 410 is completed to MSS2
Notice, MSS2, which receives to send to controlled entity NCS2 after this update notification, is updated successfully message.
If MSS1 has TGW, and the TGW in media path 3 is not shared with MSS2, then performs subsequent step 412~step
Rapid 414, otherwise connected by reusing the part in media path 3, and step 406 and step 409, or step are passed through by MSS2
406 and step 411 inside establish between IGW and shared TGW media connection, realize between RNS2 and MSS2 media connection.
Step 412, controlled entity NCS2 asks the connection of RNS2 more new medias, for example sends Modify Bearer
Request message, carries one or more link informations of MSS2；
Step 413, RNS2 agrees to renewal, for example sends Modify Bearer Response message, carries the company of RNS2
Connect information；
Step 414, controlled entity NCS2 sends update notification to MSS2, for example sends Modify Bearer Response
Message, the link information of RNS2 is carried in message.
So far, new 5, UTS of media connection is set up between RNS2 and MSS2 to connect 4 with media by media connection 5
The media path of composition continues business with distal end.
Fig. 5 is that the packet switch Mobile Access Network of the embodiment of the present invention four triggers the flow chart for the method that media redirect,
As shown in figure 5, this example is described when UTS carries out exchange of media class business, the situation that media redirect operation is initiated, wherein
RNS1 is source radio node system, and NCS1 is source network control system, and MSS1 is source media exchange system, and RNS2 is Target Wireless
Node system, NCS2 are objective network control system, and MSS2 is target medium exchange system, its step is as follows：
Step 500~step 503 is identical with the step 400 in Fig. 4~step 403；
Handoff procedure may reselect NCS2 as controlled entity, and controlled entity is by gravity treatment in the present embodiment
NCS2；
Step 504, controlled entity (the present embodiment NCS2) selects new MSS2 and sends to MSS2 to create connection message,
For example Create Session Request message is sent, message can also carry the mark for creating forwarding connection, which can quilt
The IGW of MSS2 is received, if PS access nets deploy PDS, which can also be received by the PDEA of MSS2, the Create
UTS contextual informations are carried in Session Request message, can also carry the contextual information of connection, including connection
Each link information, such as IP address, can also include port numbers and/or connection identifier information, when being free of port numbers in link information
Pre-configured port numbers can be used；
So-called controlled entity selects new MSS2 to refer to the new IGW of control entity selection, and new TGW also may be selected.
Step 505~step 507 is identical with the step 407 in Fig. 4~step 409；
In this example, the forwarding established in step 507 connection is the first bearer connection, and other connection is second to hold
Carry connection.In this example, media connection of second bearer connection between RNS to target MSS.
Step 508, alternatively, controlled entity (the present embodiment NCS2) asks to create forwarding connection to MSS2, for example sends out
Send Create Indirect Data Forwarding Tunnel Request message；
Step 509, MSS2 is returned and created successfully, for example sends Create Indirect Data Forwarding
Tunnel Response message, message carry the link information of the forwarding connection of MSS2；
In this example, the forwarding connection created in step 508 is the first bearer connection.In this example, the first carrying connects
Connect and can also be created by step 504~507 with implicit.
Step 510, alternatively, controlled entity NCS2 notifies MSS1 renewal connections, for example sends Create Indirect
Data Forwarding Tunnel Request message, message carry the link information of the forwarding connection of MSS2；
Step 511, MSS1 is returned and is updated successfully, for example sends Create Indirect Data Forwarding
Tunnel Response message；
Step 512, MSS1 starts forwarding capability, and the media data for issuing UTS received is transmitted to MSS2；
Forwarding connection can be IGW1 to the connection between IGW2, the connection between IGW1, TGW1 and IGW2, IGW1,
Connection between TGW2 and IGW2, the wherein connection between IGW1, TGW1, TGW2 and IGW2, IGW1, TGW1 belong to MSS1,
IGW2, TGW2 belong to MSS2, and TGW can be one or more.If media connection at this time 5 is not yet set up, MSS2 can
To store the media data received from forwarding connection, UTS is issued again after media connection 5 is set up, so as to subtract
Few business interruption time.
508~step 512 of above-mentioned steps is optional step.
Step 513, it is identical with the step 410 in Fig. 4；
Step 514, MSS2 is updated successfully after receiving the media data from media connection 4 to controlled entity NCS2 transmissions
Message, for example Modify Bearer Request message is sent, if being not carried out step 507, message carries the one of MSS2
A or multiple link informations；
Another kind is achieved in that SA sends renewal completion to MSS2, or by PDS after step 513 is completed to MSS2
Notice, MSS2, which receives to send to controlled entity NCS2 after this update notification, is updated successfully message.
If MSS1 has TGW, and the TGW in media path 3 is not shared with MSS2, then performs subsequent step 515~step
Rapid 517, otherwise connected by reusing the part in media path 3, and step 504 and step 507, or step are passed through by MSS2
504 and step 514 inside establish between IGW and shared TGW media connection, realize between RNS2 and MSS2 media connection.
Step 515, controlled entity NCS2 asks the connection of RNS2 more new medias, for example sends Modify Bearer
Request message, carries one or more link informations of MSS2；
Step 516, RNS2 agrees to renewal, for example sends Modify Bearer Response message, is carried in message
The link information of RNS2；
Step 517, controlled entity NCS2 sends update notification to MSS2, for example sends Modify Bearer Response
Message, the link information of RNS2 is carried in message.
So far, new 5, UTS of media connection is set up between RNS2 and MSS2 to connect 4 with media by media connection 5
The media path of composition continues business with distal end.
Fig. 6 is that the packet switch Mobile Access Network of the embodiment of the present invention five triggers the flow chart for the method that media redirect,
As shown in fig. 6, this example is described when UTS carries out exchange of media class business, the situation that media redirect operation is initiated, wherein
MSS1 is source media exchange system, and MSS2 is target medium exchange system, its step is as follows：
Step 600, it is identical with the step 200 of Fig. 2；
Step 601, NCS determine renewal UTS Mobile Access Network route, such as MSS1 load excessive, it is necessary to change to by
MSS2 provides exchange of media, and either the on-position of UTS is more suitable for providing exchange of media using MSS2 or receives UTS's
Situations such as determining to provide exchange of media using MSS2 after request；
Step 602~step 607 is identical with step 204~step 209 of Fig. 2；
In this example, the forwarding established in step 604 connection is the first bearer connection, and other connection is second to hold
Carry connection.In this example, media connection of second bearer connection between RNS to target MSS.
In this example, the forwarding connection created in step 606 is the first bearer connection.In this example, the first carrying connects
Connect and can also be created by step 602~605 with implicit.
Step 608~step 610 is identical with step 213~step 215 of Fig. 2；
If MSS1 has TGW, and the TGW in media path 1 is not shared with MSS2, then performs subsequent step 611~step
Rapid 613, otherwise connected by reusing the part in media path 1, and built by MSS2 by step 602 and step 605 in inside
Vertical media connection between IGW and shared TGW, realizes the media connection between RNS and MSS2.
Step 611, alternatively, NCS asks the connection of RNS more new medias, for example sends Modify Bearer Request and disappear
Breath, carries one or more link informations of MSS2；
Step 612, RNS agrees to renewal, for example sends Modify Bearer Response message, carries the connection of RNS2
Information；
Step 613, alternatively, NCS sends update notification to MSS2, for example sends Modify Bearer Request and disappear
Breath, carries the link information of RNS；
So far, new media connection 3 is set up between RNS and MSS2.
Step 614, it is identical with the step 221 in Fig. 2.
So far, new media connection 4 is set up, and UTS can connect 3 media that 4 compositions are connected with media by media
Path continues business with distal end.
Fig. 7 is that the routing update of the embodiment of the present invention notifies flow chart, as shown in fig. 7, this example describes MSS notices SA
The situation of more new business route, its step are as follows：
Step 701, MSS sends IP information to SA, this IP information causes distal end to be sent to this IP information after the completion of updating
Data can all pass through this MSS, the information of the instruction UTS obtained from UTS contextual informations also be carried, such as the IP of UTS
Information or IMSI.
SA realizes that media redirect according to received IP information.
If not including SA address informations in UTS contextual informations, MSS can be obtained by routing update set-up procedure
SA address informations, can also obtain SA address informations by pre-configured mode.
Fig. 8 is another flow chart that the routing update of the embodiment of the present invention notifies, as shown in figure 8, this example describes
The situation of MSS notice SA more new business routes, mainly includes the following steps that：
Step 801, MSS sends IP information to PDS, this IP information causes distal end to be sent to this IP information after the completion of updating
Data can all pass through this MSS, the information of the instruction UTS obtained from UTS contextual informations also be carried, such as the IP of UTS
Information or IMSI；
Step 802, PDS sends this IP information to SA.
SA realizes that media redirect according to received IP information.
If not including SA address informations in UTS contextual informations, MSS can be obtained by routing update set-up procedure
SA address informations, can also obtain SA information by pre-configured mode, and SA information can also be not required, and by PDS according to instruction UTS's
Information inquiry is to SA information.
The present invention also describes the system that a kind of packet switch Mobile Access Network redirects, including the PS Mobile Access Networks
NCS, UTS, RNS or source MSS, target MSS, and the SA of service network, wherein,
NCS, the first bearer connection is created for request target MSS for UTS；
Target MSS, for sending IP information to service adaptation function SA；
Source MSS, for the media data from first bearer connection received to be transmitted to the UTS；Alternatively,
The media data of the UTS received is transmitted to the target MSS by first bearer connection；
RNS, for the media data of the UTS received to be transmitted to the target by first bearer connection
MSS。
It will be appreciated by those skilled in the art that the present invention has no change to the structure of existing PS Mobile Access Networks, therefore,
Related network elements and its structure, reference can be made to system architecture shown in earlier figures 1 and understand.Hereinafter, emphasis improves its function
The new function realized of network element and its be described with interacting of realizing of other network elements.
Wherein, media connection of first bearer connection between the target MSS and the source MSS；
Alternatively, media connection of first bearer connection between the target MSS and RNS.
Wherein, before the NCS request targets MSS creates the first bearer connection for UTS, the NCS is further used for, and connects
Handover request is received, and performs handover operation.
Wherein, the NCS is further used for, and asks the target MSS to create the second bearer connection for the UTS；
The target MSS is further used for, and connects second bearer connection and first bearer connection.
Wherein, the NCS is further used for, and asks the source MSS to create the 3rd bearer connection with RNS, the source MSS
The media data from the 3rd bearer connection received is transmitted to the target by first bearer connection
MSS。
Wherein, the NCS is further used for, and obtains the contextual information of the UTS, and send and create to the target MSS
Connection message is built, wherein, described to create the contextual information that the UTS is carried in connection message, the contextual information is extremely
It is at least one including following information less：
The identification information of UTS and the IP information of UTS.
Wherein, the target MSS is further used for, and IP letters are sent to the SA directly or by strategy distribution system PDS
Breath.
Wherein, before the NCS request targets MSS creates the first bearer connection for UTS, the NCS is further used for, root
According to the on-position of the UTS, or the situation of source MSS, or the request of the UTS, the target MSS is determined.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (16)
1. a kind of method that packet switch Mobile Access Network triggering media redirect, it is characterised in that the described method includes：
Network control system NCS request target media exchange systems MSS creates the first bearer connection for client terminal system UTS；
The target MSS sends IP information to service adaptation function SA；
The media data from first bearer connection received is transmitted to the UTS by source MSS；Alternatively, source MSS or nothing
The media data for being sent to the UTS received is transmitted to the mesh by line node system RNS by first bearer connection
Mark MSS；
Media connection of first bearer connection between the target MSS and the source MSS；Or for the target MSS with
Media connection between the RNS.
2. according to the method described in claim 1, it is characterized in that, the NCS request targets MSS creates the first carrying for UTS
Before connection, the method further includes：
The NCS receives handover request.
3. according to the method described in claim 2, it is characterized in that, the method further includes：
The NCS performs handover operation.
4. according to the method described in claim 1, it is characterized in that, the method further includes：
The NCS asks the target MSS to create the second bearer connection for the UTS, and the target MSS connections described second are held
Carry connection and first bearer connection.
5. according to the method described in claim 1, it is characterized in that, the method further includes：
The NCS asks the source MSS to create the 3rd bearer connection with RNS, the source MSS will receive from described the
The media data of three bearer connections is transmitted to the target MSS by first bearer connection.
6. according to the method described in claim 1, it is characterized in that, the NCS request targets MSS creates the first carrying for UTS
It is connected as：
The NCS obtains the contextual information of the UTS, and is sent to the target MSS and create connection message, wherein, it is described
The contextual information that the UTS is carried in connection message is created, the contextual information includes at least following information at least
One：
The identification information of UTS and the IP information of UTS.
7. according to the method described in claim 1, it is characterized in that, the target MSS is to SA transmissions IP information：
The target MSS sends IP information directly or by strategy distribution system PDS to the SA.
8. according to the method described in claim 1, it is characterized in that, the NCS request targets MSS creates the first carrying for UTS
Before connection, the method further includes：
The NCS determines the target according to the on-position of the UTS, or the situation of source MSS, or the request of the UTS
MSS。
9. the system that a kind of packet switch Mobile Access Network triggering media redirect, includes NCS, the UTS of PS Mobile Access Networks,
RNS or source MSS, target MSS, and the SA of service network, it is characterised in that NCS, first is created for request target MSS for UTS
Bearer connection；
Target MSS, for sending IP information to service adaptation function SA；
Source MSS, for the media data from first bearer connection received to be transmitted to the UTS；Alternatively, it will connect
The received media data for being sent to the UTS is transmitted to the target MSS by first bearer connection；
RNS, for the media data of the UTS received to be transmitted to the target MSS by first bearer connection；
Media connection of first bearer connection between the target MSS and the source MSS；Or for the target MSS with
Media connection between the RNS.
10. system according to claim 9, it is characterised in that the NCS request targets MSS creates the first carrying for UTS
Before connection, the NCS is further used for, and receives handover request.
11. system according to claim 10, it is characterised in that the NCS is further used for, and performs handover operation.
12. system according to claim 9, it is characterised in that
The NCS is further used for, and asks the target MSS to create the second bearer connection for the UTS；
The target MSS is further used for, and connects second bearer connection and first bearer connection.
13. system according to claim 9, it is characterised in that
The NCS is further used for, and asks the source MSS to create the 3rd bearer connection with RNS, and the source MSS will be received
The media data from the 3rd bearer connection target MSS is transmitted to by first bearer connection.
14. system according to claim 9, it is characterised in that
The NCS is further used for, and obtains the contextual information of the UTS, and send establishment connection to the target MSS and disappear
Breath, wherein, described create carries the contextual information of the UTS in connection message, the contextual information include at least with
Lower information it is at least one：
The identification information of UTS and the IP information of UTS.
15. system according to claim 9, it is characterised in that
The target MSS is further used for, and IP information is sent to the SA directly or by strategy distribution system PDS.
16. system according to claim 9, it is characterised in that the NCS request targets MSS creates the first carrying for UTS
Before connection, the NCS is further used for, according to the on-position of the UTS, or the situation of source MSS, or the UTS please
Ask, determine the target MSS.
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| CN201110213892.XA CN102905331B (en) | 2011-07-28 | 2011-07-28 | The method and system that packet switch Mobile Access Network triggering media redirect |
| PCT/CN2012/077370 WO2013013546A1 (en) | 2011-07-28 | 2012-06-21 | Method and system for packet switching mobile access network to trigger media reorientation, mss device, and ncs device |
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| CN201110213892.XA CN102905331B (en) | 2011-07-28 | 2011-07-28 | The method and system that packet switch Mobile Access Network triggering media redirect |
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|---|---|---|---|---|
| CN101217798A (en) * | 2008-01-09 | 2008-07-09 | 中兴通讯股份有限公司 | A local transferring control method in IP multimedia subsystem |
| CN102111919A (en) * | 2009-12-24 | 2011-06-29 | 中兴通讯股份有限公司 | Local IP (Internet Protocol) network connection management method, device and system |
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| WO2008020787A1 (en) * | 2006-08-16 | 2008-02-21 | Telefonaktiebolaget L M Ericsson (Publ) | Ggsn proxy for one tunnel solution |
| CN101227720B (en) * | 2008-01-09 | 2012-05-09 | 中兴通讯股份有限公司 | Local transferring control method of IP multimedia subsystem |
| CN101552978B (en) * | 2008-03-31 | 2011-04-13 | 华为技术有限公司 | Method, system and device for realizing route optimization |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101217798A (en) * | 2008-01-09 | 2008-07-09 | 中兴通讯股份有限公司 | A local transferring control method in IP multimedia subsystem |
| CN102111919A (en) * | 2009-12-24 | 2011-06-29 | 中兴通讯股份有限公司 | Local IP (Internet Protocol) network connection management method, device and system |
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