WO2013013546A1 - 分组交换移动接入网触发媒体重定向的方法及系统、mss装置、ncs装置 - Google Patents

分组交换移动接入网触发媒体重定向的方法及系统、mss装置、ncs装置 Download PDF

Info

Publication number
WO2013013546A1
WO2013013546A1 PCT/CN2012/077370 CN2012077370W WO2013013546A1 WO 2013013546 A1 WO2013013546 A1 WO 2013013546A1 CN 2012077370 W CN2012077370 W CN 2012077370W WO 2013013546 A1 WO2013013546 A1 WO 2013013546A1
Authority
WO
WIPO (PCT)
Prior art keywords
mss
uts
connection
target
ncs
Prior art date
Application number
PCT/CN2012/077370
Other languages
English (en)
French (fr)
Inventor
谢振华
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2013013546A1 publication Critical patent/WO2013013546A1/zh

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0011Control or signalling for completing the hand-off for data sessions of end-to-end connection

Definitions

  • the present invention relates to a redirection technology, and in particular, to a method and system for triggering media redirection by a packet switched mobile access network, an MSS device, and an NCS device.
  • Background technique
  • Packet (Switching) mobile access network includes Long Term Evolution (LTE) network, Universal Mobile Telecommunications System (UMTS) network, GSM EDGE radio access network (GERAN, GSM EDGE radio access) Network ), Code Division Multiple Access (CDMA) network, etc., provides users with access to Internet Protocol (IP), thereby enabling users to access the Internet.
  • LTE Long Term Evolution
  • UMTS Universal Mobile Telecommunications System
  • GERAN GSM EDGE radio access network
  • CDMA Code Division Multiple Access
  • the PS mobile access network mainly includes a User Terminal System (UTS), a Radio Node System (RNS), a Network Control System (NSS), and a Media Switch System (MSS). Such network elements may also include a Policy Dispatch System (PDS).
  • UTS User Terminal System
  • RNS Radio Node System
  • NSS Network Control System
  • MSS Media Switch System
  • SA Policy Dispatch System
  • SA Service adaptation function
  • NAT network address translation
  • Proxy Call Session Control Function P-CSCF, Proxy Call Session Control Function
  • IMS IP Multimedia Sub-system
  • the UTS is used to send and receive wireless information and present services to users.
  • RNS is used to send and receive wireless information, and interact with NCS and MSS, so that NCS can exchange signaling information with UTS, and enable MSS to exchange media data with UTS.
  • RNS can be subdivided into control. Face entities and user face entities.
  • the NCS is used to control the RNS and the MSS to provide mobility management and the like for the user.
  • the MSS is used to provide bearers for the exchange of media data.
  • the MSS includes one or more media switching gateways (MSGWs).
  • MSGWs media switching gateways
  • multi-level refers to the exchange of media data with the IP network by the RNS through multiple (two or more) MSGWs for a certain service or all services.
  • a media switching gateway that provides IP network interaction capability for a certain service or all services is called an IGW (Internet Gateway), such as a public data network gateway in an LTE network (PDN- GW, Public Data Network Gateway) or Gateway GPRS Support Node (GGSN) in the UMTS network.
  • IGW Internet Gateway
  • PDN- GW Public Data Network Gateway
  • GGSN Gateway GPRS Support Node
  • TGW Transfer Gateway
  • SGW, Service Gateway), TGW can be an independent entity, or it can be a functional module of NCS, such as SGSN in UMTS network.
  • the IGW for Service 1 may be the TGW for Service 2, and vice versa.
  • the PDS is used to receive (transmitted through the RNS, NCS and MSS) service information from the UTS or SA, and generate policies and distribute them to the MSS to establish a suitable bearer. Therefore, when the PDS is deployed, the PDS execution agent PDEA (Policy Dispatch Execution Agent) is set in the MSS.
  • the PDEA can be an independent functional entity in the MSS, and the TGW and/or IGW in the MSS can transmit signaling through the interface. It can be a logical function in TGW or IGW.
  • S102 is a radio interface between a UTS and an RNS, and is used for receiving, by the UTS, wireless information from the RNS and transmitting wireless information to the RNS;
  • S106 is an interface between the RNS and the MSS, and is used by the RNS.
  • the user interface implements the interface; S108 is an interface between the NCS and the MSS, and is used by the NCS to control the behavior of the MSS through signaling; S110 is an interface between the PDEA and the PDS in the MSS when the PDS is deployed, and the policy for receiving the PDS distribution and the direction
  • the PDS requests the distribution policy; S112 is the interface between the SA and the PDS when the PDS is deployed, and is used by the SA to send the service information to the PDS and the PDS notifies the SA of the access network related information; S114 is the interface between the MSS and the SA, and is used for the MSS and the SA. Exchange information, or UTS exchanges information with the SA through the MSS.
  • the PS mobile access network selects an IGW of the MSS to assign an IP address to it.
  • the IGW - Provide media exchange service directly to the user. Even if UTS moves far away, the PS mobile access network will not reselect a nearby IGW in the local area of UTS, which will result in the media path in the PS mobile access network. The serious detours, so that the performance of the service provided by the PS mobile access network is affected, such as a long delay.
  • the main object of the present invention is to provide a method and system for triggering media redirection of a packet switched mobile access network, an MSS device, and an NCS device, which are suitable for UTS by redirecting UTS in the PS mobile access network.
  • the MSS triggers the routing of optimized multimedia services.
  • a method for triggering media redirection by a packet switched mobile access network includes:
  • the NCS requests the target MSS to create a first bearer connection for the UTS
  • the target MSS sends IP information to the SA
  • the source MSS forwards the received media data from the first bearer connection to the UTS; or the source MSS or the RNS forwards the received media data sent to the UTS to the The target MSS.
  • the first connection is a media connection between the target MSS and the source MSS.
  • the first bearer connection is a media connection between the target MSS and the RNS.
  • the method further includes:
  • the NCS receives a handover request.
  • the method further includes:
  • the NCS performs a switching operation.
  • the method further includes:
  • the NCS requests the target MSS to create a second bearer connection for the UTS, and the target MSS connects the second bearer connection with the first bearer connection.
  • the method further includes:
  • the NCS requests the source MSS to establish a third bearer connection with the RNS, and the source MSS forwards the received media data from the third bearer connection to the target MSS through the first bearer connection.
  • the NCS requests the target MSS to create a first bearer connection for the UTS: the NCS obtains the context information of the UTS, and sends a create connection message to the target MSS, where the create connection message carries Context information of the UTS, the context information includes at least one of the following information:
  • UTS identification information and UTS IP information.
  • the target MSS sends the IP information to the SA as:
  • the target MSS sends IP information to the SA either directly or through a policy distribution system PDS.
  • the method further includes:
  • the NCS determines the target MSS according to the access location of the UTS, or the status of the source MSS, or the request of the UTS.
  • a system for triggering media redirection by a packet switched mobile access network including the PS mobile connection Networked NCS, UTS, RNS or source MSS, target MSS, and SA of the service network, where
  • NCS used to request the target MSS to create a first bearer connection for the UTS
  • the target MSS is configured to send IP information to the service adaptation function SA.
  • a source MSS configured to forward the received media data from the first bearer connection to the UTS; or forward the received media data sent to the UTS to the Target MSS;
  • the RNS is configured to forward the received media data of the UTS to the target MSS by using the first bearer connection.
  • the first connection is a media connection between the target MSS and the source MSS;
  • the first bearer connection is a media connection between the target MSS and the RNS.
  • the NCS is further configured to receive a handover request.
  • the NCS is further configured to perform a handover operation.
  • the NCS is further configured to: request the target MSS to create a second bearer connection for the UTS;
  • the target MSS is further configured to connect the second bearer connection and the first bearer connection.
  • the NCS is further configured to: request the source MSS to create a third bearer connection with the RNS, where the source MSS forwards the received media data from the third bearer connection through the first bearer connection. Give the target MSS.
  • the NCS is further configured to: obtain context information of the UTS, and send a create connection message to the target MSS, where the create connection message carries context information of the UTS, and the context information At least one of the following information is included:
  • UTS identification information and UTS IP information.
  • the target MSS is also used to directly or through the policy distribution system PDS
  • the SA sends IP information.
  • the NCS is further configured to determine, according to the access location of the UTS, the status of the source MSS, or the request of the UTS, Target MSS.
  • a packet switching mobile access network triggers a media redirected target media switching system MSS device, the device comprising a receiving unit and a sending unit, wherein:
  • a receiving unit configured to receive a request for creating a first bearer connection for the UTS from the NCS
  • a sending unit configured to send the IP information to the SA.
  • the sending unit sends the IP information to the SA to send the IP information to the SA through the policy distribution system PDS.
  • a packet control mobile access network triggers media redirection network control system NCS device, where the device includes a first request unit:
  • the first requesting unit is configured to request the target MSS to create a first bearer connection for the UTS.
  • the apparatus further comprises a second request unit:
  • a second requesting unit configured to request the target MSS to create a second bearer connection for the UTS, where the second bearer connection is connected to the first bearer connection by the target MSS;
  • a second requesting unit configured to request the source MSS to create a third bearer connection with the RNS, where the media data in the third bearer connection is forwarded by the source MSS to the target MSS by using the first bearer connection.
  • the device further comprises an obtaining unit:
  • an obtaining unit configured to acquire context information of the UTS, where the context information includes at least one of identifier information of the UTS and IP information of the UTS, where the context information is used by the first requesting unit.
  • the device further comprises a determining unit:
  • a determining unit configured to be based on an access location of the UTS, or a status of a source MSS, or The UTS request determines the target MSS.
  • the NCS requests the target media switching system MSS to create a first bearer connection for the user terminal system UTS; the target MSS sends IP information to the SA; and the source MSS forwards the received media data from the first bearer connection to the UTS; or, the source MSS or the wireless node system RNS forwards the received media data of the UTS to the target MSS through the first bearer connection.
  • the first bearer connection is a media connection between the target MSS and the source MSS; or a media connection between the target MSS and the RNS.
  • the present invention can relocate the UTS in time, so as to trigger the optimization of the UTS access route in the PS mobile access network in time, without causing the detour of the multimedia service flow.
  • 1 is a schematic structural diagram of an existing PS mobile access network
  • FIG. 2 is a flowchart of a method for triggering media redirection by a packet switched mobile access network according to Embodiment 1 of the present invention
  • FIG. 3 is a flowchart of a method for triggering media redirection by a packet switched mobile access network according to Embodiment 2 of the present invention
  • FIG. 4 is a flowchart of a method for triggering media redirection by a packet switched mobile access network according to Embodiment 3 of the present invention
  • FIG. 5 is a flowchart of a method for triggering media redirection by a packet switched mobile access network according to Embodiment 4 of the present invention
  • FIG. 6 is a flowchart of a method for triggering media redirection by a packet switched mobile access network according to Embodiment 5 of the present invention.
  • FIG. 7 is a flowchart of a route update notification according to an embodiment of the present invention.
  • FIG. 8 is another flowchart of a route update notification according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a structure of a target media switching system MSS device that triggers media redirection by a packet switched mobile access network according to an embodiment of the present invention
  • FIG. 10 is a schematic structural diagram of a network control system NCS apparatus for triggering media redirection by a packet switched mobile access network according to an embodiment of the present invention.
  • the basic idea of the present invention is: The NCS requests the target MSS to create a first bearer connection for the user terminal system UTS; the target MSS sends IP information to the SA; the source MSS forwards the received media data from the first bearer connection to the UTS; or, the source MSS or the wireless node system RNS forwards the received media data of the UTS to the target MSS through the first bearer connection.
  • FIG. 2 is a flowchart of a method for triggering media redirection by a packet switched mobile access network according to Embodiment 1 of the present invention.
  • this example describes a media redirection operation initiated when a UTS performs a media switching service.
  • RNS1 is the source wireless node system
  • NCS1 is the source network control system
  • MSS1 is the source media switching system
  • RNS2 is the target wireless node system
  • NCS2 is the target network control system
  • MSS2 is the target media switching system
  • the mobile access network redirection method mainly includes the following steps:
  • the NCS1 obtains UTS context information, such as an IPv4 address, an IPv6 address,
  • the mobile station identifier may also include the address information of the SA used by the service on the UTS, such as the domain name of the SA, or the IP address of the SA, and may also include the connection information of the UTS.
  • the UTS context information can also be passively (received by the NCS query) or actively or directly or indirectly by one or a combination of UTS, SA and MSS (via other network elements, such as UTS passed to the NCS via the MSS, or through the SA) PDS and MSS are passed to NCS) to NCS, It can be passed to the NCS via one or more signaling messages.
  • NCS1 may need to statically configure certain parameters, such as the address information of the SA.
  • Step 200 is an optional step.
  • Step 201 the UTS sends a measurement report to the RNS1, for example, sends a measurement to the RNS1.
  • the message includes information such as the signal strength of the surrounding cells measured by the UTS;
  • Step 202 The RNS1 determines to perform handover according to the measurement report information, and then sends handover signaling to the NCS1, for example, sends a Handover Required message;
  • Step 203 If the NCS1 selects a new NCS2 to provide network control, the NCS1 initiates a handover forwarding operation to the NCS2, for example, sending a Forward Relocation message, the message carrying UTS context information, and UTS context information such as IP information for UTS (may be more And / or International Mobile Subscriber Identification Number (IMSI), may also include the address information of the SA used by the service on the UTS, such as the domain name of the SA, or the IP address of the SA, and may also include UTS Connection information, etc.;
  • IMSI International Mobile Subscriber Identification Number
  • Step 204 If step 203 is performed, the control entity is NCS2, otherwise the control entity is NCS1, and the control entity (NCS2 in this embodiment) selects a new MSS2 and sends a create connection message to the MSS2, for example, sends a Create Session Request message, a message.
  • the identifier of the forwarding connection can also be carried, and the message is received by the IGW of the MSS2. If the PDS is deployed on the PS access network, the message is also received by the PDEA of the MSS2, and the message carries the UTS context information.
  • control entity selects a new MSS2 to control the entity to select a new IGW, and also selects a new TGW.
  • the new MSS is selected to reselect the IGW in the MSS, or to reselect the IGW and part of the TGW, or to reselect the IGW and all TGWs.
  • the selection of a new MSS for the following embodiments is also the same meaning, no longer - description.
  • Step 205 The MSS2 initiates a route update notification process according to the received UTS context information.
  • the SA service route needs to be updated by using any of the methods shown in FIG. 5 and FIG. 6, and the SA obtains new IP information, such as a new IPv4 address, through the route update notification process. IPv6 address, or IPv6 prefix, etc., so that the routing of the service can be updated;
  • Step 206 The SA initiates a remote update process on the service network according to the obtained new IP information.
  • the specific remote update process is determined according to the service network, if the service network is an IP Multimedia Subsystem (IMS).
  • the network the remote update process may be to send a relNVITE (re-invitation) message, the new address information can be carried through the contact header field of the message and the message body to notify the remote end.
  • relNVITE rel-invitation
  • Step 207 after step 204, or after step 205, the MSS2 returns a create success message, such as sending a Create Session Response message, carrying one or more connection information of the MSS2, such as an IP address, and may also include a port number and/or a connection.
  • the identifier information may be used when the port number is not included in the connection information.
  • the Create Session Response message may also determine whether to carry the connection information of the forwarding connection in the MSS2 according to the identifier of the forwarding connection created in step 204. Determining and directly inserting the connection information in the Create Session Response message in the MSS2;
  • the forwarding connection established in step 207 is the first bearer connection, and the other connection is the second bearer connection.
  • the second bearer connection is a media connection between the RNS and the target MSS.
  • Step 208 If the forwarding connection is not created in step 207, the control entity NCS2 requests the MSS2 to create a forwarding connection, for example, sending a Create Indirect Data Forwarding Tunnel Request message to the MSS2.
  • the forwarding connection created in step 208 is the first bearer connection.
  • the first bearer connection can also be created implicitly through steps 204-207.
  • the so-called first bearer connection mainly refers to the media connection between the target MSS and the source MSS, and between the target MSS and the RNS. Pick up.
  • Step 209 The MSS2 returns a successful creation, for example, a Create Indirect Data Forwarding Tunnel Response message, where the message carries the connection information of the forwarding connection of the MSS2.
  • Step 210 after receiving the creation success message, the control entity NCS2 notifies the RNS2 to prepare for handover, for example, sends a Handover Request. a message, the message carrying one or more connection information of the MSS2;
  • Step 211 The RNS2 prepares the resource, including the radio connection resource with the UTS, and after the preparation is completed, notifies the control entity that the NCS2 is ready to complete, for example, sends a Handover Request Acknowledge message, where the message carries the connection information of the RNS2;
  • Step 212 If step 203 is performed, the NCS2 sends a forward response to the NCS1, for example, sending a Forward Relocation Response message, where the message carries the connection information of the forwarding connection of the MSS2;
  • Step 213 The NCS1 notifies the MSS1 to update the connection, for example, sends a Create Indirect Data Forwarding Tunnel Request message, where the message carries the connection information of the forwarding connection of the MSS2.
  • Step 214 the MSS1 returns the update success to the NCS1, for example, sends a Create Indirect Data Forwarding Tunnel Response to the NCS1.
  • Step 215 The MSS1 starts the forwarding function, and forwards the received media data sent to the UTS to the MSS2.
  • the forwarding connection may be a connection between IGW1 to IGW2, a connection between IGW1, TGW1 and IGW2, a connection between IGW1, TGW2 and IGW2, a connection between IGW1, TGW1, TGW2 and IGW2, where IGW1 and TGW1 belong to MSS1 IGW2, TGW2 belong to MSS2, and TGW can be one or more.
  • the MSS 2 can store the media data received from the forwarding connection, and then send it to the UTS after the media connection 3 is established, thereby reducing the service interruption time.
  • the NCS1 receives the forward forwarding response message of step 212 or the preparation completion message of step 211, and the NCS 1 sends a consent handover message to the RNS 1, for example, sends a Handover Command message;
  • Step 217 the RSN1 sends a handover notification to the UTS, for example, sending a Handover Command message;
  • Step 219 The RNS2 sends a completion notification message to the control entity NCS2.
  • Step 220 The control entity NCS2 sends an acknowledgement success message to the MSS2, for example, sending a Modify Bearer Request message, where the message carries the connection information of the RNS2;
  • a new media connection 3 is established, which also contains a UTS to RNS2 wireless connection.
  • Step 221 The SA receives the update completion message from the service network, so that the service data is routed to the new IP information, that is, the IP information provided in step 205, the IP information is such that the service data is routed to the MSS2, and the SA receives.
  • the point in time to the message may be any point after step 206.
  • the specific remote update completion process is determined according to the service network. If the service network is an IP multimedia subsystem IMS network, the remote update completion process may be to receive a 200 OK message.
  • the new media connection 4 is established, and the UTS can continue the service through the media path formed by the media connection 3 and the media connection 4 and the remote end. Since the media connection 4 is created in the prior art, the specific manner in which it is created will not be described.
  • FIG. 3 is a flowchart of a method for triggering media redirection by a packet-switched mobile access network according to Embodiment 2 of the present invention.
  • this example describes a media redirection operation initiated when a UTS performs a media switching service.
  • the packet switching mobile access network redirection method of the present example mainly includes the following steps: Steps 300 to 312 are the same as steps 200 to 212 of FIG. 2; Step 313, optionally, the NCS1 notifies the MSS1 to update the connection, for example, sends a Create Indirect Data Forwarding Tunnel Request message, and the message carries the connection of the forwarding connection of the MSS2. information;
  • Step 314, MSS1 returns an update success message to NCS1, for example, sending Create to NCS1.
  • Step 315 the MSS1 starts the forwarding function, and forwards the media data received from the forwarding connection of the MSS1 to the MSS2;
  • the forwarding connection between MSS1 and MSS2 may be the connection between IGW1 and IGW2, IGW1.
  • the connection between TGW1 and IGW2, the connection between IGW1, TGW2 and IGW2, the connection between IGW1, TGW1, TGW2 and IGW2, where IGW1, TGW1 belong to MSS1, IGW2, TGW2 belong to MSS2, and TGW can be one or more One.
  • Step 316 After receiving the forward forwarding response message of step 312 or the preparation completion message of step 311, the NCS1 sends a consent handover message to the RNS1, for example, sends a Handover Command message. If steps 313 to 315 are performed, the message carries the MSS1. Forwarding the connection information of the connection, otherwise the message carries the connection information of the forwarding connection of the MSS2;
  • the connection created between step 314 and step 316 is the third bearer connection.
  • the third bearer connection refers to RNS1 to MSS1.
  • Step 317 The RNS1 starts the forwarding function, and forwards the media data sent to the UTS to the MSS1 or the MSS2. If the data is forwarded to the MSS1, the MSS1 forwards the data to the MSS2. If the media connection 3 has not been established at this time, the MSS2 can store the media data received from the forwarding connection, and then send the media connection 3 to the UTS, thereby reducing the service interruption time.
  • Steps 318 to 322 are identical to steps 217 to 221 in FIG. 2 .
  • the UTS can continue to conduct services through the media path formed by the media connection 3 and the media connection 4.
  • FIG. 4 is a flowchart of a method for triggering media redirection by a packet switched mobile access network according to Embodiment 3 of the present invention.
  • this example describes a media redirection operation initiated when a UTS performs a media switching service.
  • RNS1 is the source wireless node system
  • NCS1 is the source network control system
  • MSS1 is the source media switching system
  • RNS2 is the target wireless node system
  • NCS2 is the target network control system
  • MSS2 is the target media switching system
  • the mobile access network redirection method mainly includes the following steps:
  • Steps 400 to 402 are the same as steps 200 to 202 in FIG. 2;
  • Step 403 the network performs the handover operation according to the existing handover technology, and the handover process may re-select the NCS2 as the control entity.
  • the control entity is reselected as the NCS2;
  • Step 404 optionally, the control entity (NCS2 in this embodiment) requests the MSS1 to create a forwarding connection, and sends a Create Indirect Data Forwarding Tunnel Request message to the MSS1.
  • Step 405 the MSS1 returns a successful creation, for example, sends Create Indirect Data. Forwarding Tunnel Response message, the message carrying the connection connection of the MSS 1 in step 406, the control entity NCS2 selects a new MSS2 and sends a create connection message to the MSS2, for example, sends a Create Session Request message, which is received by the IGS of the MSS2. If the PDS is deployed on the PS access network, the message is also received by the PDEA of the MSS2.
  • the message carries the UTS context information, and may also carry the identifier for creating the forwarding connection. If the steps 404 to 405 are not performed, the message is sent. It also carries the context information of the connection, including the connection information, such as the IP address, and may also include the port number and/or the connection identification information. If the connection information does not include the port number, the pre-configured port number may be used. 404 ⁇ Step 405, which also carries the connection information of the forwarding connection of the MSS1; The so-called control entity selects a new MSS2 to control the entity to select a new IGW, and also selects a new TGW.
  • Step 407 to step 408, which are the same as steps 205 to 206 in FIG. 2;
  • Step 409 optionally, after step 406, or after step 407, the MSS2 returns a successful creation to the NCS2, for example, sending a Create Session Response message, carrying one or more connection information of the MSS2, such as an IP address, and may also include a port number and The connection identifier information may be used. If the port number is not included in the connection information, the pre-configured port number may be used.
  • the Create Session Response message may also determine whether to carry the connection information of the forwarding connection in the MSS2 according to the identifier of the forwarding connection created in step 406. Alternatively, the connection information of the forwarding connection in the MSS2 may be directly inserted in the Create Session Response message without making a decision;
  • the forwarding connection established in step 409 is the first bearer connection, and the other connection is the second bearer connection.
  • the second bearer connection is a media connection between the RNS and the target MSS.
  • Step 410 is the same as step 221 in FIG. 2;
  • the new media connection 4 is established.
  • the remote end may transmit downlink media data through the media connection 2 and be received by the MSS1, and the MSS1 may transmit to the UTS through the media connection 3, when the remote end receives the update message and modifies the media.
  • the MSS2 receives the downlink media data transmitted from the new media connection 4, and the MSS2 forwards the media data from the media connection 4 to the MSS1. If steps 404 to 405 are performed, the forwarding destination is the forwarding of the MSS1.
  • the connection information of the connection the MSS1 receives the forwarded media data and transmits it to the UTS through the media connection 3, so the MSS1 actually realizes that the media data from the media connection 2 and the forwarding from the media connection 4 are transmitted to the UTS through the media connection 3.
  • the forwarding connection may be a connection between IGW2 and IGW1, a connection between IGW2, TGW2 and TGW1, a connection between IGW2 and TGW1, a connection between IGW2, TGW2, IGW1 and TGW1, wherein IGW1 and TGW1 belong to MSS1, IGW2, TGW2 Belongs to MSS2, the TGW can be one or more.
  • This form of IGW2-TGW1 indicates that MSS1 shares TGW1 with MSS2, and there is already a connection to UTS between TGW1 and RNS2.
  • Step 411 After receiving the media data from the media connection 4, the MSS2 sends an update success message to the control entity NCS2, for example, sending a Modify Bearer Request message. If the step 409 is not performed, the message carries one or more connection information of the MSS2.
  • the SA sends an update completion notification to the MSS2 after completing the step 410 to the MSS2, or through the PDS, and after receiving the update notification, the MSS2 sends an update success message to the control entity NCS2.
  • the MSS1 has a TGW and the TGW in the media path 3 is not shared with the MSS2, the subsequent steps 412 to 414 are performed. Otherwise, the partial connection in the media path 3 is reused, and the MSS2 passes the steps 406 and 409, or steps. 406 and 411 internally establish a media connection between the IGW and the shared TGW, and implement a media connection between the RNS2 and the MSS2.
  • Step 412 The control entity NCS2 requests the RNS2 to update the media connection, for example, sends a Modify Bearer Request message, and carries one or more connection information of the MSS2.
  • Step 413 The RNS2 agrees to update, for example, sends a Modify Bearer Response message, and carries the connection information of the RNS2.
  • Step 414 The control entity NCS2 sends an update notification to the MSS2, for example, sending a Modify Bearer Response message, where the message carries the connection information of the RNS2.
  • UTS can continue the service through the media path formed by media connection 5 and media connection 4 and the remote end.
  • FIG. 5 is a flowchart of a method for triggering media redirection by a packet-switched mobile access network according to Embodiment 4 of the present invention.
  • this example describes a media redirection operation initiated when a UTS performs a media switching service.
  • RNS1 is the source wireless node system
  • NCS1 is the source network control system
  • MSS1 is the source media switching system
  • RNS2 is the target wireless node system
  • NCS2 is the target network control system
  • MSS2 is the target media switching system.
  • the steps are as follows: Steps 500 to 503 are the same as steps 400 to 403 in FIG. 4; the handover process may reselect NCS2 as the control entity, and in this embodiment, the control entity is reselected as NCS2;
  • Step 504 The control entity (NCS2 in this embodiment) selects a new MSS2 and sends a create connection message to the MSS2, for example, sends a Create Session Request message, and the message may also carry an identifier for creating a forwarding connection, and the message is received by the IGW of the MSS2. If the PDS is deployed on the PS access network, the message is also received by the PDEA of the MSS2.
  • the Create Session Request message carries the UTS context information, and may also carry the connection context information, including the connection information, such as IP.
  • the address may also include a port number and/or connection identification information, and a pre-configured port number may be used when the connection information does not include a port number;
  • control entity selects a new MSS2 to control the entity to select a new IGW, and also selects a new TGW.
  • Steps 505 to 507 are the same as steps 407 to 409 in FIG. 4;
  • the forwarding connection established in step 507 is the first bearer connection, and the other connection is the second bearer connection.
  • the second bearer connection is a media connection between the RNS and the target MSS.
  • Step 508 optionally, the control entity (NCS2 in this embodiment) requests the MSS2 to create a forwarding connection, and sends a Create Indirect Data Forwarding Tunnel Request message to the MSS2.
  • Step 509 the MSS2 returns a successful creation, for example, sends Create Indirect Data.
  • Forwarding Tunnel Response message the message carries the connection information of the forwarding connection of the MSS2.
  • the forwarding connection created in step 508 is the first bearer connection.
  • the first bearer connection can also be created implicitly through steps 504-507.
  • Step 510 optionally, the control entity NCS2 notifies the MSS1 to update the connection, for example, sends a Create Indirect Data Forwarding Tunnel Request message, where the message carries the connection information of the forwarding connection of the MSS2;
  • Step 511 the MSS1 returns an update success, for example, sending a Create Indirect Data Forwarding Tunnel Response message;
  • Step 512 the MSS1 starts the forwarding function, and forwards the received media data sent to the UTS to the MSS2;
  • the forwarding connection may be a connection between IGW1 to IGW2, a connection between IGW1, TGW1 and IGW2, a connection between IGW1, TGW2 and IGW2, a connection between IGW1, TGW1, TGW2 and IGW2, where IGW1 and TGW1 belong to MSS1 IGW2, TGW2 belong to MSS2, and TGW can be one or more.
  • the MSS 2 can store the media data received from the forwarding connection, and then send it to the UTS after the media connection 5 is established, thereby reducing the service interruption time.
  • Step 513 is the same as step 410 in FIG. 4;
  • Step 514 After receiving the media data from the media connection 4, the MSS2 sends an update success message to the control entity NCS2, for example, sending a Modify Bearer Request message. If the step 507 is not performed, the message carries one or more connection information of the MSS2.
  • the SA after completing step 513, the SA sends an update completion notification to the MSS2, or through the PDS, to the MSS2, and after receiving the update notification, the MSS2 sends an update success message to the control entity NCS2.
  • the MSS1 has TGW, and the TGW in the media path 3 is not shared with the MSS2, the subsequent steps 515 to 517 are performed. Otherwise, the partial connection in the media path 3 is reused, and the MSS2 passes the steps 504 and 507, or steps. 504 and 514 internally establish a media connection between the IGW and the shared TGW to implement a media connection between the RNS2 and the MSS2.
  • Step 515 The control entity NCS2 requests the RNS2 to update the media connection, for example, sends a Modify Bearer Request message, and carries one or more connection information of the MSS2.
  • step 516 the RNS2 agrees to update, for example, sending a Modify Bearer Response message.
  • the message carries the connection information of the RNS2;
  • Step 517 The control entity NCS2 sends an update notification to the MSS2, for example, sends a Modify Bearer Response message, where the message carries the connection information of the RNS2.
  • FIG. 6 is a flowchart of a method for triggering media redirection by a packet-switched mobile access network according to Embodiment 5 of the present invention. As shown in FIG. 6, this example describes a media redirection operation initiated when a UTS performs a media switching service. Situation, where MSS1 is the source media switching system and MSS2 is the target media switching system. The steps are as follows:
  • Step 600 is the same as step 200 of FIG. 2;
  • Step 601 The NCS decides to update the mobile access network route of the UTS. For example, the load of the MSS1 is too large, and the media exchange needs to be performed by the MSS2, or the access location of the UTS is more suitable for providing media exchange by using the MSS2, or receiving the request of the UTS. Later decided to use MSS2 to provide media exchange and other conditions;
  • Step 602 to step 607 which are the same as steps 204 to 209 of FIG. 2;
  • the forwarding connection established in step 604 is the first bearer connection, and the other connection is the second bearer connection.
  • the second bearer connection is a media connection between the RNS and the target MSS.
  • the forwarding connection created in step 606 is the first bearer connection.
  • the first bearer connection can also be created implicitly through steps 602-605.
  • Steps 608 to 610 are the same as steps 213 to 215 of FIG. 2;
  • MSS1 has TGW, and the TGW in media path 1 is not shared with MSS2, perform the following steps 611 ⁇ 613, otherwise, by reusing part of the connection in media path 1, and by MSS2 to establish internally through step 602 and step 605
  • the media connection between the IGW and the shared TGW enables media connection between the RNS and the MSS 2.
  • Step 611 optionally, the NCS requests the RNS to update the media connection, for example, sending a Modify Bearer Request message, and carrying one or more connection information of the MSS2;
  • Step 612 the RNS agrees to update, for example, sends a Modify Bearer Response message, and carries the connection information of the RNS2.
  • Step 613 optionally, the NCS sends an update notification to the MSS2, such as sending a Modify Bearer.
  • Step 614 is the same as step 221 in FIG.
  • the new media connection 4 is established, and the UTS can continue the service through the media path formed by the media connection 3 and the media connection 4 and the remote end.
  • FIG. 7 is a flowchart of a route update notification according to an embodiment of the present invention. As shown in FIG. 7, this example describes a case where an MSS notifies an SA to update a service route, and the steps are as follows:
  • Step 701 The MSS sends an IP information to the SA, where the IP information is sent to the MSS after the remote update is completed, and the information indicating the UTS obtained from the UTS context information, such as the IP address for the UTS, is also carried. Information or IMSI.
  • the SA implements media redirection based on the received IP information.
  • the MSS can obtain the SA address information through the route update preparation process, and obtain the SA address information through the pre-configuration.
  • FIG. 8 is another flowchart of the route update notification according to the embodiment of the present invention.
  • the example describes the case where the MSS notifies the SA to update the service route, and the method mainly includes the following steps: Step 801:
  • the MSS sends an IP address to the PDS.
  • Information the IP information is such that the data sent to the IP information after the remote update is completed passes through the MSS, and also carries information indicating UTS obtained from the UTS context information, such as IP information or IMSI for UTS;
  • Step 802 The PDS sends the IP information to the SA.
  • the SA implements media redirection based on the received IP information. If the UTS context information does not contain the SA address information, the MSS can obtain the SA address information through the route update preparation process, and can obtain the SA information through the pre-configuration manner, and the SA information is not needed, but the PDS queries according to the information indicating the UTS. SA information.
  • the present invention also describes a system for packet switching mobile access network redirection, including the NCS, UTS, RNS or source MSS of the PS mobile access network, the target MSS, and the SA of the service network, where
  • NCS used to request the target MSS to create a first bearer connection for the UTS
  • the target MSS is configured to send IP information to the service adaptation function SA.
  • a source MSS configured to forward the received media data from the first bearer connection to the UTS; or forward the received media data of the UTS to the target MSS by using the first bearer connection ;
  • the RNS is configured to forward the received media data of the UTS to the target MSS by using the first bearer connection.
  • the first bearer connection is a media connection between the target MSS and the source MSS;
  • the first bearer connection is a media connection between the target MSS and the RNS.
  • the NCS requests the target MSS to be the UTS to create the first bearer connection,
  • the NCS is also used to receive a handover request and perform a handover operation.
  • the NCS is further configured to: request the target MSS to create a second bearer connection for the UTS;
  • the target MSS is further configured to connect the second bearer connection and the first bearer connection.
  • the NCS is further configured to: request the source MSS to create a third bearer connection with the RNS, where the source MSS forwards the received media data from the third bearer connection to the first bearer connection.
  • the target MSS is further configured to connect the second bearer connection and the first bearer connection.
  • the NCS is further configured to: request the source MSS to create a third bearer connection with the RNS, where the source MSS forwards the received media data from the third bearer connection to the first bearer connection.
  • the NCS is further configured to: obtain context information of the UTS, and send a create connection message to the target MSS, where the create connection message carries context information of the UTS, where the context information is at least Includes at least one of the following information:
  • UTS identification information and UTS IP information.
  • the target MSS is further configured to send IP information to the SA directly or through a policy distribution system PDS.
  • the NCS Before the NCS requests the target MSS to create a first bearer connection for the UTS, the NCS is further configured to determine the target according to the access location of the UTS, the status of the source MSS, or the request of the UTS. MSS.
  • FIG. 9 is a schematic structural diagram of a component media switching system MSS device that triggers media redirection by a packet switched mobile access network according to an embodiment of the present invention. As shown in FIG. 9, the packet switched mobile access network of this example triggers media redirection.
  • the target media switching system MSS device includes a receiving unit 90 and a transmitting unit 91, where:
  • the receiving unit 90 is configured to receive a request for creating a first bearer connection for the UTS from the NCS, and the sending unit 91 is configured to send the IP information to the SA.
  • the transmitting unit 91 transmits IP information to the SA to transmit IP information to the SA through the policy distribution system PDS.
  • each processing unit in the target media switching system MSS device that triggers media redirection by the packet-switched mobile access network may refer to the foregoing method for triggering media redirection by the packet-switched mobile access network. Describe and understand. Those skilled in the art should understand that the functions of the above processing units may be implemented by a program running on a processor, or may be implemented by a specific logic circuit. 10 is a schematic structural diagram of a network control system NCS device that triggers media redirection by a packet-switched mobile access network according to an embodiment of the present invention, where the apparatus includes a first requesting unit 1001:
  • the first requesting unit 1001 is configured to request the target MSS to create a first bearer connection for the UTS.
  • 10 is a network control system NCS device that triggers media redirection in a packet-switched mobile access network according to an embodiment of the present invention, where the apparatus further includes a second request unit 1002:
  • a second requesting unit 1002 configured to request the target MSS to create a second bearer connection for the UTS, where the second bearer connection is connected to the first bearer connection by using the target MSS;
  • the second requesting unit 1002 is configured to request the source MSS to create a third bearer connection with the RNS, where the media data in the third bearer connection is forwarded by the source MSS to the target MSS by using the first bearer connection.
  • the device further includes an acquiring unit (not shown in FIG. 10): an acquiring unit, configured to: Obtaining context information of the UTS, the context information including at least one of identifier information of the UTS and IP information of the UTS, the context information being used by the first requesting unit.
  • the device further includes a determining unit (not shown in FIG. 10): a determining unit, configured to: The target MSS is determined according to the access location of the UTS, or the status of the source MSS, or the request of the UTS.
  • each processing unit in the network control system NCS device that triggers media redirection by the packet-switched mobile access network may refer to the foregoing description of the method for triggering media redirection by the packet-switched mobile access network. And understand. It should be understood by those skilled in the art that the functions of the above processing units can be implemented by a program running on a processor, It can be realized by a specific logic circuit.
  • the NMS requests the target MSS to create a first bearer connection for the user terminal system UTS through the NCS; the target MSS sends the IP information to the SA; the source MSS forwards the received media data from the first bearer connection to the UTS; or The source MSS or the wireless node system RNS forwards the received media data of the UTS to the target MSS through the first bearer connection, and can relocate the UTS in time, so as to promptly trigger the optimization of the UTS in the PS mobile access network. Access routing does not cause a round of multimedia traffic.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

本发明公开了一种分组交换移动接入网触发媒体重定向的方法,系统及装置。该方法包括:网络控制系统(NCS)请求目标媒体交换系统(MSS)为用户终端系统(UTS)创建第一承载连接;该目标MSS向业务适配功能(SA)发送IP信息;源MSS将接收到的来自所述第一承载连接的媒体数据转发给该UTS;或者,源MSS或无线节点系统(RNS)将接收到的发往该UTS的媒体数据通过第一承载连接转发给目标MSS。本发明能及时对UTS重定位,从而及时触发优化分组移动接入网中的UTS接入路由,避免多媒体业务流的迂回。

Description

分组交换移动接入网触发媒体重定向的方法及系统、 MSS装置、
NCS装置 技术领域
本发明涉及重定向技术, 尤其涉及一种分组交换移动接入网触发媒体 重定向的方法及系统、 MSS装置、 NCS装置。 背景技术
分组( PS , Packet Switching )移动接入网包括长期演进( LTE, Long Term Evolution ) 网络, 通用移动通信系统 ( UMTS , Universal Mobile Telecommunications System)网络, GSM EDGE无线接入网络( GERAN, GSM EDGE radio access network ), 码分多址 ( CDMA, Code Division Multiple Access ) 网络等, 为用户提供网际协议 ( IP, Internet Protocol )接入能力, 从而使用户访问 Internet网络。
PS移动接入网主要包括用户终端系统( UTS , User Terminal System ) , 无线节点系统( RNS , Radio Node System ) , 网络控制系统( NCS , Network Control System )和媒体交换系统(MSS, Media Switch System )等网元, 还可能包括策略分发系统( PDS , Policy Dispatch System )等。为了承载 UTS 的基于 IP的业务, 业务网络会设置一个对应的业务适配功能(SA, Service Adapter )与接入网交互,比如 Internet网络中的网络地址转换( NAT, Network Address Transfer )设备, IP多媒体子系统( IMS , IP Multimedia Sub-system ) 中的代理呼叫会话控制功能实体 (P-CSCF , Proxy Call Session Control Function ) 等。 其中, UTS 用于收发无线信息, 并为用户呈现业务。 RNS 用于收发无线信息, 并与 NCS和 MSS进行交互,使 NCS能与 UTS交互信 令信息, 并使 MSS能与 UTS交换媒体数据, 具体的, RNS可再细分为控 制面实体与用户面实体。 NCS用于控制 RNS与 MSS, 以为用户提供移动性 管理等。 MSS 用于提供承载(Bearer ) 以实现媒体数据的交换。 针对于某 个业务或所有业务, MSS 包含一级或多级媒体交换网关 (MSGW, Media Switch Gateway ), 所谓 "一级" 是指针对某个业务或所有业务时, RNS只 需经过一个 MSGW即可实现与 IP网络的媒体数据交换, 所谓 "多级" 是 指针对某个业务或所有业务时, RNS需经过多个(两个以上) MSGW才可 实现与 IP网络的媒体数据交换。 对于采用多级媒体交换网关的 PS移动接 入网, 针对某个业务或所有业务提供 IP网络交互能力的媒体交换网关称为 IGW ( Internet Gateway ), 比如 LTE网络中的公用数据网网关 ( PDN-GW, Public Data Network Gateway )或 UMTS 网络中的网关 GPRS 支持节点 ( GGSN, Gateway GPRS Support Node ),其他媒体交换网关提供转接能力, 称为 TGW( Transfer Gateway ),比如 LTE网络中的服务网关( SGW, Service Gateway ), TGW可以是独立实体, 也可以是 NCS的一个功能模块, 比如 UMTS网络中的 SGSN。 针对业务 1的 IGW有可能是针对业务 2的 TGW, 反之亦然。 PDS用于接收(通过 RNS, NCS和 MSS传递 )来自 UTS或 SA 的业务信息, 并依此生成策略并分发给 MSS, 以建立合适的承载。 因此, 部署 PDS时, 在 MSS中就设置了 PDS的执行代理 PDEA ( Policy Dispatch Execution Agent ), PDEA可以是 MSS中的独立功能实体,与 MSS中的 TGW 和 /或 IGW通过接口传递信令, 也可以是 TGW或 IGW中的逻辑功能。
图 1为现有的 PS移动接入网的架构示意图,如图 1所示, S102为 UTS 与 RNS间的无线接口,用于 UTS接收来自 RNS的无线信息已及向 RNS发 送无线信息; S104为 RNS与 NCS的接口, 用于 RNS接收来自 NCS的信 令以及向 NCS发送信令,如果 RNS分为用户面和控制面,则由其控制面实 现该接口; S106为 RNS与 MSS的接口, 用于 RNS接收来自 MSS的媒体 数据以及向 MSS发送媒体数据, 如果 RNS分为用户面和控制面, 则由其 用户面实现该接口; S108为 NCS与 MSS的接口, 用于 NCS通过信令控制 MSS的行为; S110为部署了 PDS时, MSS中的 PDEA与 PDS的接口, 用 于接收 PDS分发的策略以及向 PDS请求分发策略; S112为部署了 PDS时, SA与 PDS的接口, 用于 SA向 PDS发送业务信息以及 PDS向 SA通知接 入网相关信息; S114为 MSS与 SA的接口, 用于 MSS与 SA交换信息, 或 UTS通过 MSS与 SA交换信息。
现有的 PS移动接入网中, 当 UTS接入 PS移动接入网后, PS移动接 入网会选择 MSS的某个 IGW为其分配 IP地址,当 UTS进行媒体交换类业 务时,该 IGW—直为该用户提供媒体交换服务, 即使 UTS移动到了很远的 地方, PS移动接入网也不会在 UTS的当地重新选择一个就近的 IGW, 这 会导致 PS移动接入网内的媒体路径的严重迂回, 从而使得 PS移动接入网 提供业务的性能受到影响, 如延迟较长等。 发明内容
有鉴于此, 本发明的主要目的在于提供一种分组交换移动接入网触发 媒体重定向的方法及系统、 MSS装置、 NCS装置, 通过对 PS移动接入网 中 UTS重定向, 为 UTS选取合适的 MSS, 触发优化多媒体业务的路由。
为达到上述目的, 本发明的技术方案是这样实现的:
一种分组交换移动接入网触发媒体重定向的方法, 包括:
NCS请求目标 MSS为 UTS创建第一承载连接;
所述目标 MSS向 SA发送 IP信息;
源 MSS 将接收到的来自所述第一承载连接的媒体数据转发给所述 UTS; 或者, 源 MSS或 RNS将接收到的发往所述 UTS的媒体数据通过所 述第一承载连接转发给所述目标 MSS。
优选地, 所述第一^载连接为所述目标 MSS与所述源 MSS之间的媒 体连接。 优选地, 所述第一承载连接为所述目标 MSS与 RNS之间的媒体连接。 优选地, 所述 NCS请求目标 MSS为 UTS创建第一承载连接之前, 所 述方法还包括:
所述 NCS接收到切换请求。
优选地, 所述方法还包括:
所述 NCS执行切换操作。
优选地, 所述方法还包括:
所述 NCS请求所述目标 MSS为所述 UTS创建第二承载连接, 所述目 标 MSS连接所述第二承载连接和所述第一承载连接。
优选地, 所述方法还包括:
所述 NCS请求所述源 MSS创建与 RNS的第三承载连接,所述源 MSS 将接收到的来自所述第三承载连接的媒体数据通过所述第一承载连接转发 给所述目标 MSS。
优选地, 所述 NCS请求目标 MSS为 UTS创建第一承载连接为: 所述 NCS获取所述 UTS的上下文信息, 并向所述目标 MSS发送创建 连接消息, 其中, 所述创建连接消息中携带有所述 UTS的上下文信息, 所 述上下文信息至少包括以下信息的至少一个:
UTS的标识信息和 UTS的 IP信息。
优选地, 所述目标 MSS向 SA发送 IP信息为:
所述目标 MSS直接或通过策略分发系统 PDS向所述 SA发送 IP信息。 优选地, 所述 NCS请求目标 MSS为 UTS创建第一承载连接之前, 所 述方法还包括:
所述 NCS根据所述 UTS的接入位置, 或源 MSS的状况, 或所述 UTS 的请求, 确定所述目标 MSS。
一种分组交换移动接入网触发媒体重定向的系统, 包括所述 PS移动接 入网的 NCS, UTS, RNS或源 MSS, 目标 MSS, 以及业务网的 SA, 其中,
NCS, 用于请求目标 MSS为 UTS创建第一承载连接;
目标 MSS, 用于向业务适配功能 SA发送 IP信息;
源 MSS , 用于将接收到的来自所述第一承载连接的媒体数据转发给所 述 UTS; 或者, 将接收到的发往所述 UTS的媒体数据通过所述第一承载连 接转发给所述目标 MSS;
RNS, 用于将接收到的所述 UTS的媒体数据通过所述第一承载连接转 发给所述目标 MSS。
优选地, 所述第一^载连接为所述目标 MSS与所述源 MSS之间的媒 体连接;
或者, 所述第一承载连接为所述目标 MSS与 RNS之间的媒体连接。 优选地, 所述 NCS请求目标 MSS为 UTS创建第一承载连接之前, 所 述 NCS还用于, 接收切换请求。
优选地, 所述 NCS还用于, 执行切换操作。
优选地, 所述 NCS还用于, 请求所述目标 MSS为所述 UTS创建第二 承载连接;
所述目标 MSS还用于, 连接所述第二承载连接和所述第一承载连接。 优选地, 所述 NCS还用于, 请求所述源 MSS创建与 RNS的第三承载 连接, 所述源 MSS将接收到的来自所述第三承载连接的媒体数据通过所述 第一承载连接转发给所述目标 MSS。
优选地, 所述 NCS还用于, 获取所述 UTS的上下文信息, 并向所述目 标 MSS 发送创建连接消息, 其中, 所述创建连接消息中携带有所述 UTS 的上下文信息, 所述上下文信息至少包括以下信息的至少一个:
UTS的标识信息和 UTS的 IP信息。
优选地,所述目标 MSS还用于,直接或通过策略分发系统 PDS向所述 SA发送 IP信息。
优选地, 所述 NCS请求目标 MSS为 UTS创建第一承载连接之前, 所 述 NCS还用于,根据所述 UTS的接入位置,或源 MSS的状况,或所述 UTS 的请求, 确定所述目标 MSS。
一种分组交换移动接入网触发媒体重定向的目标媒体交换系统 MSS装 置, 所述装置包括接收单元、 发送单元, 其中:
接收单元, 用于接收来自 NCS的为 UTS创建第一承载连接的请求; 发送单元, 用于向 SA发送 IP信息。
优选地, 所述发送单元向 S A发送 IP信息为通过策略分发系统 PDS向 所述 SA发送 IP信息。
一种分组交换移动接入网触发媒体重定向的网络控制系统 NCS装置, 其中, 所述装置包括第一请求单元:
第一请求单元, 用于请求目标 MSS为 UTS创建第一承载连接。
优选地, 所述装置还包括第二请求单元:
第二请求单元,用于请求所述目标 MSS为所述 UTS创建第二承载连接, 所述第二承载连接通过所述目标 MSS和所述第一承载连接相连; 或
第二请求单元, 用于请求源 MSS创建与 RNS的第三承载连接, 所述 第三承载连接中的媒体数据由所述源 MSS通过所述第一承载连接转发给所 述目标 MSS。
优选地, 所述装置还包括获取单元:
获取单元, 用于获取所述 UTS的上下文信息, 所述上下文信息至少包 括 UTS的标识信息和 UTS的 IP信息中的至少一个, 所述上下文信息被所 述第一请求单元使用。
优选地, 所述装置还包括确定单元:
确定单元, 用于根据所述 UTS的接入位置, 或源 MSS的状况, 或所述 UTS的请求, 确定所述目标 MSS。
本发明中, NCS请求目标媒体交换系统 MSS为用户终端系统 UTS创 建第一承载连接; 目标 MSS向 SA发送 IP信息; 源 MSS将接收到的来自 所述第一承载连接的媒体数据转发给所述 UTS; 或者, 源 MSS或无线节点 系统 RNS将接收到的所述 UTS的媒体数据通过所述第一承载连接转发给所 述目标 MSS。 上述第一承载连接为所述目标 MSS与所述源 MSS之间的媒 体连接;或为所述目标 MSS与 RNS之间的媒体连接。本发明能及时对 UTS 重定位, 从而能及时触发优化 PS移动接入网中 UTS接入路由, 不会导致 多媒体业务流的迂回。 附图说明
图 1为现有的 PS移动接入网的架构示意图;
图 2为本发明实施例一的分组交换移动接入网触发媒体重定向的方法 的流程图;
图 3 为本发明实施例二的分组交换移动接入网触发媒体重定向的方法 的流程图;
图 4为本发明实施例三的分组交换移动接入网触发媒体重定向的方法 的流程图;
图 5 为本发明实施例四的分组交换移动接入网触发媒体重定向的方法 的流程图;
图 6为本发明实施例五的分组交换移动接入网触发媒体重定向的方法 的流程图;
图 7为本发明实施例的路由更新通知流程图;
图 8为本发明实施例的路由更新通知的另一流程图;
图 9为本发明实施例的分组交换移动接入网触发媒体重定向的目标媒 体交换系统 MSS装置的组成结构示意图; 图 10为本发明实施例的分组交换移动接入网触发媒体重定向的网络控 制系统 NCS装置的组成结构示意图。 具体实施方式
本发明的基本思想为: NCS请求目标 MSS为用户终端系统 UTS创建 第一承载连接; 目标 MSS向 SA发送 IP信息; 源 MSS将接收到的来自所 述第一承载连接的媒体数据转发给所述 UTS; 或者, 源 MSS或无线节点系 统 RNS将接收到的所述 UTS的媒体数据通过所述第一承载连接转发给所述 目标 MSS。
为使本发明的目的, 技术方案和优点更加清楚明白, 以下举实施例并 参照附图, 对本发明进一步详细说明。
图 2为本发明实施例一的分组交换移动接入网触发媒体重定向的方法 的流程图, 如图 2所示, 本示例描述了当 UTS进行媒体交换类业务时, 发 起媒体重定向操作的情况, 其中 RNS1为源无线节点系统, NCS1为源网络 控制系统, MSS1 为源媒体交换系统, RNS2 为目标无线节点系统, NCS2 为目标网络控制系统, MSS2为目标媒体交换系统, 本示例的分组交换移动 接入网重定向方法主要包括以下步驟:
步驟 200, 在 UTS发起业务前或执行业务过程中, NCS1获取 UTS上 下文信息,比如针对 UTS的 IP信息(可以是 IPv4地址、 IPv6地址、或 IPv6 前缀等形式, 可能存在多个 ) 和 /或国际移动台标识 ( IMSI , International Mobile Subscriber Identification Number ),还可包含 UTS上的业务使用的 SA 的地址信息, 比如 SA的域名, 或 SA的 IP地址, 还可包含 UTS的连接信 息等。
UTS上下文信息也可以被动地(接收到 NCS的查询)或主动地由 UTS、 SA和 MSS之一或组合直接地或间接地(通过其他网元传递, 比如 UTS经 过 MSS传递给 NCS , 或 SA通过 PDS和 MSS传递给 NCS )提供给 NCS , 如可以通过一个或多个信令消息传递给 NCS。
如果没有路由更新准备过程, 则 NCS1 可能需要静态配置某些参数, 比如 SA的地址信息。
步驟 200为可选步驟。
步驟 201 , UTS发送测量报告给 RNS1 ,比如向 RNS1发送 Measurement
Report消息, 消息中包括 UTS测量到的周围小区的信号强度等信息;
步驟 202, RNS1根据测量报告信息决定执行切换, 于是向 NCS1发送 切换信令, 比如发送 Handover Required消息;
步驟 203, 如果 NCS1选择了新的 NCS2提供网络控制, 则 NCS1向 NCS2发起切换前转操作, 比如发送 Forward Relocation消息, 该消息携带 UTS上下文信息, UTS上下文信息如针对 UTS的 IP信息(可能存在多个) 和 /或国际移动台标 i只 ( IMSI, International Mobile Subscriber Identification Number ),还可包括 UTS上的业务使用的 SA的地址信息,比如 SA的域名, 或 SA的 IP地址, 还可包含 UTS的连接信息等;
步驟 204, 如果执行了步驟 203, 则控制实体为 NCS2, 否则控制实体 为 NCS1 , 控制实体(本实施例为 NCS2 )选择新的 MSS2并向 MSS2发送 创建连接消息, 比如发送 Create Session Request消息, 消息还可携带创建转 发连接的标识, 该消息会被 MSS2的 IGW接收到, 如果 PS接入网部署了 PDS, 则该消息还会被 MSS2的 PDEA接收到, 该消息携带 UTS上下文信 息;
这里, 控制实体选择新的 MSS2指控制实体选择新的 IGW, 还可选择 新的 TGW。 本发明中, 选择新的 MSS为, 重新选择 MSS中的 IGW, 或重 新选择 IGW和部分 TGW, 或重新选择 IGW和全部 TGW。 下述实施例的 选择新的 MSS也为相同的含义, 不再——说明。
步驟 205 , MSS2根据接收到的 UTS上下文信息发起路由更新通知过程 以通知 SA业务路由需要更新,具体可使用图 5及图 6所示的任何一种方式 通知 SA业务路由需要更新, SA通过路由更新通知过程可获得新的 IP信息 等, 比如新的 IPv4地址、 IPv6地址、 或 IPv6前缀等, 从而可更新业务的 路由;
步驟 206, SA根据获得的新的 IP信息, 在业务网发起远端更新过程; 具体的远端更新过程根据业务网而定, 如果业务网是 IP多媒体子系统 IMS ( IP Multi-media Sub-system ) 网络, 则远端更新过程可以是发送 relNVITE (重邀请)消息, 新的地址信息可以通过消息的 Contact (联系人) 头域和消息体携带以通知到远端。
步驟 207, 在步驟 204之后, 或在步驟 205之后, MSS2返回创建成功 消息, 比如发送 Create Session Response消息, 携带 MSS2的一个或多个连 接信息, 比如 IP地址, 还可包含端口号和 /或连接标识信息, 连接信息中不 含端口号时可采用预配置的端口号; Create Session Response消息还可根据 步驟 204中的创建转发连接的标识决定是否携带转发连接在 MSS2中的连 接信息, 也可不作判决而直接在 Create Session Response消息中插入转发连 接在 MSS2中的连接信息;
本示例中, 步驟 207 中建立的转发连接即为第一承载连接, 另外的连 接即为第二承载连接。 本示例中, 第二承载连接为 RNS到目标 MSS之间 的媒体连接。
步驟 208,如果步驟 207没有创建转发连接,则控制实体 NCS2向 MSS2 请求创建转发连接, 比如向 MSS2发送 Create Indirect Data Forwarding Tunnel Request消息;
本示例中, 步驟 208中创建的转发连接即为第一承载连接。 本示例中, 第一承载连接也可通过步驟 204~207以隐式方式创建。 所谓第一承载连接, 主要是指目标 MSS与源 MSS之间, 以及目标 MSS与 RNS之间的媒体连 接。
步驟 209 , MSS2 返回创建成功, 比如发送 Create Indirect Data Forwarding Tunnel Response消息, 消息中携带 MSS2的转发连接的连接信 步驟 210, 控制实体 NCS2接收到创建成功消息后, 通知 RNS2准备切 换, 比如发送 Handover Request消息, 消息中携带 MSS2的一个或多个连 接信息;
步驟 211 , RNS2准备资源,包括与 UTS的无线连接资源,准备完成后, 则通知控制实体 NCS2准备完成, 比如发送 Handover Request Acknowledge 消息, 消息中携带 RNS2的连接信息;
步驟 212, 如果执行了步驟 203, 则 NCS2向 NCS1发送前转响应, 比 如发送 Forward Relocation Response消息, 消息中携带 MSS2的转发连接的 连接信息;
步驟 213 , NCS1通知 MSS1更新连接, 比如发送 Create Indirect Data Forwarding Tunnel Request消息,消息中携带 MSS2的转发连接的连接信息; 步驟 214, MSS1 向 NCS1返回更新成功, 比如向 NCS1发送 Create Indirect Data Forwarding Tunnel Response消息;
步驟 215 , MSS1启动转发功能,将接收到的发给 UTS的媒体数据转发 给 MSS2;
转发连接可以是 IGW1至 IGW2之间的连接, IGW1、 TGW1和 IGW2 之间的连接, IGW1、 TGW2和 IGW2之间的连接, IGW1、 TGW1、 TGW2 和 IGW2之间的连接, 其中 IGW1、 TGW1属于 MSS1 , IGW2、 TGW2属 于 MSS2, TGW可以是一个或多个。 如果此时媒体连接 3尚未建立起来, 则 MSS2可以存储从转发连接中接收到的媒体数据, 在媒体连接 3建立起 来后再发给 UTS, 从而可以减少业务中断时间。 步驟 216, NCS1接收到步驟 212的前转响应消息或步驟 211的准备完 成消息, NCS 1向 RNS 1发送同意切换消息, 比如发送 Handover Command 消息;
步驟 217, RSN1向 UTS发送切换通知, 比如发送 Handover Command 消息;
步驟 218, UTS调制到目标小区后, 向 RNS2发送切换完成消息, 比如 发送 Handover Complete消息;
步驟 219, RNS2向控制实体 NCS2发送完成通知消息;
步驟 220,控制实体 NCS2向 MSS2发送确认成功消息,比如发送 Modify Bearer Request消息, 消息中携带 RNS2的连接信息;
至此, 新的媒体连接 3建立起来, 该媒体连接还包含 UTS到 RNS2的 无线连接。
步驟 221 , SA接收到了来自业务网的更新完成消息, 从而使业务数据 路由到新的 IP信息上, 也即步驟 205提供的 IP信息上, 该 IP信息使得业 务数据会被路由到 MSS2, SA接收到该消息的时间点可能是步驟 206后的 任意时间点。
具体的远端更新完成过程根据业务网而定, 如果业务网是 IP多媒体子 系统 IMS网络, 则远端更新完成过程可以是接收到 200 OK消息。
至此, 新的媒体连接 4建立起来, UTS可以通过媒体连接 3和媒体连 接 4构成的媒体路径与远端继续进行业务。 由于媒体连接 4的创建方式为 现有技术, 不再赘述其创建的具体方式。
图 3 为本发明实施例二的分组交换移动接入网触发媒体重定向的方法 的流程图, 如图 3所示, 本示例描述了当 UTS进行媒体交换类业务时, 发 起媒体重定向操作的情况, 其中 MSS1为源媒体交换系统, MSS2为目标媒 体交换系统, 本示例的分组交换移动接入网重定向方法主要包括以下步驟: 步驟 300~步驟 312, 与图 2的步驟 200~步驟 212完全相同; 步驟 313 ,可选地, NCS1通知 MSS1更新连接,比如发送 Create Indirect Data Forwarding Tunnel Request消息, 消息中携带 MSS2的转发连接的连接 信息;
步驟 314, MSS1向 NCS1返回更新成功消息,比如向 NCS1发送 Create
Indirect Data Forwarding Tunnel Response消息, 消息中携带 MSS 1的转发连 接的连接信息;
步驟 315 , MSS1启动转发功能, 将从 MSS1的转发连接中接收到的媒 体数据转发给 MSS2;
MSS1与 MSS2间的转发连接可以是 IGW1至 IGW2之间的连接, IGW1、
TGW1和 IGW2之间的连接 , IGW1、 TGW2和 IGW2之间的连接 , IGW1、 TGW1、 TGW2和 IGW2之间的连接,其中 IGW1、 TGW1属于 MSS 1 , IGW2、 TGW2属于 MSS2, TGW可以是一个或多个。
上述步驟 313~步驟 315为可选步驟。
步驟 316, NCS1接收到步驟 312的前转响应消息或步驟 311的准备完 成消息后, NCS1向 RNS1发送同意切换消息,比如发送 Handover Command 消息, 如果执行了步驟 313~步驟 315, 则消息携带 MSS1的转发连接的连 接信息, 否则消息携带 MSS2的转发连接的连接信息;
本示例中, 步驟 314至步驟 316之间创建的连接, 即为第三承载连接。 本示例中, 第三承载连接是指 RNS1到 MSS1。
步驟 317, RNS1启动转发功能, 将发往 UTS的媒体数据转发给 MSS1 或 MSS2, 如果转发给 MSS1 , 则 MSS1再转发给 MSS2。 如果此时媒体连 接 3尚未建立起来, 则 MSS2可以存储从转发连接中接收到的媒体数据, 在媒体连接 3建立起来后再发给 UTS, 从而可以减少业务中断时间。
步驟 318~步驟 322, 与图 2中的步驟 217~步驟 221完全相同。 至此, UTS可以通过媒体连接 3和媒体连接 4构成的媒体路径与远端 继续进行业务。
图 4为本发明实施例三的分组交换移动接入网触发媒体重定向的方法 的流程图, 如图 4所示, 本示例描述了当 UTS进行媒体交换类业务时, 发 起媒体重定向操作的情况, 其中 RNS1为源无线节点系统, NCS1为源网络 控制系统, MSS1 为源媒体交换系统, RNS2 为目标无线节点系统, NCS2 为目标网络控制系统, MSS2为目标媒体交换系统, 本示例的分组交换移动 接入网重定向方法主要包括以下步驟:
步驟 400~步驟 402, 与图 2中的步驟 200~202相同;
步驟 403, 网络按照现有的切换技术执行切换操作, 切换过程可能会重 新选择 NCS2作为控制实体, 本实施例中控制实体被重选为 NCS2;
经过切换操作, MSS1与 RNS2间建立起媒体连接 3。
步驟 404, 可选地, 控制实体(本实施例为 NCS2 )向 MSS1请求创建 转发连接 , t匕 ^口发送 Create Indirect Data Forwarding Tunnel Request消息、; 步驟 405 , MSS1 返回创建成功, 比如发送 Create Indirect Data Forwarding Tunnel Response消息, 消息中携带 MSS 1的转发连接的连接信 步驟 406,控制实体 NCS2选择新的 MSS2并向 MSS2发送创建连接消 息, 比如发送 Create Session Request消息, 该消息会被 MSS2的 IGW接收 到, 如果 PS接入网部署了 PDS, 则该消息还会被 MSS2的 PDEA接收到, 该消息携带 UTS上下文信息, 还可以携带创建转发连接的标识, 如果没有 执行步驟 404~步驟 405, 则上述消息中还携带有连接的上下文信息, 包括 各连接信息, 比如 IP地址, 还可包含端口号和 /或连接标识信息, 连接信息 中不含端口号时可采用预配置的端口号, 如果执行了步驟 404~步驟 405, 则还携带 MSS1的转发连接的连接信息; 所谓控制实体选择新的 MSS2指控制实体选择新的 IGW, 还可选择新 的 TGW。
步驟 407~步驟 408 , 与图 2中的步驟 205~步驟 206相同;
步驟 409, 可选地, 步驟 406之后, 或步驟 407之后, MSS2向 NCS2 返回创建成功, 比如发送 Create Session Response消息, 携带 MSS2的一个 或多个连接信息, 比如 IP地址, 还可包含端口号和 /或连接标识信息, 连接 信息中不含端口号时可采用预配置的端口号, Create Session Response消息 还可根据步驟 406中的创建转发连接的标识决定是否携带转发连接在 MSS2 中的连接信息, 也可不作判决而直接在 Create Session Response消息中插入 转发连接在 MSS2中的连接信息;
本示例中, 步驟 409 中建立的转发连接即为第一承载连接, 另外的连 接即为第二承载连接。 本示例中, 第二承载连接为 RNS到目标 MSS之间 的媒体连接。
步驟 410, 与图 2中的步驟 221相同;
至此,新的媒体连接 4建立起来。在步驟 409~步驟 410执行的过程中, 远端可能会通过媒体连接 2传送下行媒体数据并被 MSS1接收到, MSS1可 以通过媒体连接 3传送给 UTS, 当远端接收到更新消息并修改了媒体数据 传送目标后, MSS2就会接收到从新的媒体连接 4传送的下行媒体数据, MSS2将来自媒体连接 4的媒体数据转发给 MSS1 , 如果执行了步驟 404~ 步驟 405, 则转发目的为 MSS1的转发连接的连接信息, MSS1接收到转发 来的媒体数据后通过媒体连接 3传送给 UTS, 因此 MSS1实际上实现了将 来自媒体连接 2和转发自媒体连接 4的媒体数据都通过媒体连接 3传送给 UTS的功能。 转发连接可以是 IGW2至 IGW1之间的连接, IGW2、 TGW2 和 TGW1之间的连接 , IGW2至 TGW 1之间的连接 , IGW2、 TGW2、 IGW1 和 TGW1之间的连接等形式,其中 IGW1、 TGW1属于 MSS1 , IGW2、 TGW2 属于 MSS2, TGW可以是一个或多个。 IGW2-TGW1这种形式表明 MSS1 与 MSS2共享 TGW1 , 且 TGW1与 RNS2间已存在针对 UTS的连接。
步驟 411, MSS2接收到来自媒体连接 4的媒体数据后向控制实体 NCS2 发送更新成功消息, 比如发送 Modify Bearer Request消息,如果没有执行步 驟 409 , 则消息携带 MSS2的一个或多个连接信息;
另一种实现方式是, SA在完成步驟 410后向 MSS2, 或通过 PDS向 MSS2发送更新完成通知, MSS2接收到此更新通知后向控制实体 NCS2发 送更新成功消息。
如果 MSS1有 TGW, 且媒体路径 3中的 TGW都不与 MSS2共享, 则 执行后续步驟 412~步驟 414, 否则通过重用媒体路径 3中的部分连接, 并 由 MSS2通过步驟 406和步驟 409,或步驟 406和步驟 411在内部建立 IGW 与共享 TGW间的媒体连接, 实现 RNS2与 MSS2间的媒体连接。
步驟 412,控制实体 NCS2请求 RNS2更新媒体连接, 比如发送 Modify Bearer Request消息, 携带 MSS2的一个或多个连接信息;
步驟 413 , RNS2同意更新, 比如发送 Modify Bearer Response消息, 携带 RNS2的连接信息;
步驟 414, 控制实体 NCS2向 MSS2发送更新通知, 比如发送 Modify Bearer Response消息, 消息中携带 RNS2的连接信息。
至此, RNS2与 MSS2间建立起新的媒体连接 5, UTS可以通过媒体连 接 5和媒体连接 4构成的媒体路径与远端继续进行业务。
图 5 为本发明实施例四的分组交换移动接入网触发媒体重定向的方法 的流程图, 如图 5所示, 本示例描述了当 UTS进行媒体交换类业务时, 发 起媒体重定向操作的情况, 其中 RNS1为源无线节点系统, NCS1为源网络 控制系统, MSS1 为源媒体交换系统, RNS2 为目标无线节点系统, NCS2 为目标网络控制系统, MSS2为目标媒体交换系统, 其步驟如下: 步驟 500~步驟 503 , 与图 4中的步驟 400~步驟 403相同; 切换过程可能会重新选择 NCS2作为控制实体, 本实施例中控制实体 被重选为 NCS2;
步驟 504, 控制实体(本实施例为 NCS2 )选择新的 MSS2并向 MSS2 发送创建连接消息, 比如发送 Create Session Request消息, 消息还可携带创 建转发连接的标识, 该消息会被 MSS2的 IGW接收到, 如果 PS接入网部 署了 PDS ,则该消息还会被 MSS2的 PDEA接收到,该 Create Session Request 消息中携带 UTS上下文信息, 还可以携带连接的上下文信息, 包括连接的 各连接信息, 比如 IP地址, 还可包含端口号和 /或连接标识信息, 连接信息 中不含端口号时可采用预配置的端口号;
所谓控制实体选择新的 MSS2指控制实体选择新的 IGW, 还可选择新 的 TGW。
步驟 505~步驟 507 , 与图 4中的步驟 407~步驟 409相同;
本示例中, 步驟 507 中建立的转发连接即为第一承载连接, 另外的连 接即为第二承载连接。 本示例中, 第二承载连接为 RNS到目标 MSS之间 的媒体连接。
步驟 508, 可选地, 控制实体(本实施例为 NCS2 ) 向 MSS2请求创建 转发连接 , t匕 ^口发送 Create Indirect Data Forwarding Tunnel Request消息、; 步驟 509 , MSS2 返回创建成功, 比如发送 Create Indirect Data Forwarding Tunnel Response消息, 消息携带 MSS2的转发连接的连接信息; 本示例中, 步驟 508中创建的转发连接即为第一承载连接。 本示例中, 第一承载连接也可通过步驟 504~507以隐式方式创建。
步驟 510, 可选地, 控制实体 NCS2通知 MSS1 更新连接, 比如发送 Create Indirect Data Forwarding Tunnel Request消息,消息携带 MSS2的转发 连接的连接信息; 步驟 511 , MSS1返回更新成功,比如发送 Create Indirect Data Forwarding Tunnel Response消息;
步驟 512, MSS1启动转发功能,将接收到的发给 UTS的媒体数据转发 给 MSS2;
转发连接可以是 IGW1至 IGW2之间的连接, IGW1、 TGW1和 IGW2 之间的连接, IGW1、 TGW2和 IGW2之间的连接, IGW1、 TGW1、 TGW2 和 IGW2之间的连接, 其中 IGW1、 TGW1属于 MSS1 , IGW2、 TGW2属 于 MSS2, TGW可以是一个或多个。 如果此时媒体连接 5尚未建立起来, 则 MSS2可以存储从转发连接中接收到的媒体数据, 在媒体连接 5建立起 来后再发给 UTS, 从而可以减少业务中断时间。
上述步驟 508~步驟 512为可选步驟。
步驟 513 , 与图 4中的步驟 410相同;
步驟 514, MSS2接收到来自媒体连接 4的媒体数据后向控制实体 NCS2 发送更新成功消息, 比如发送 Modify Bearer Request消息,如果没有执行步 驟 507, 则消息携带 MSS2的一个或多个连接信息;
另一种实现方式是, SA在完成步驟 513后向 MSS2, 或通过 PDS向 MSS2发送更新完成通知, MSS2接收到此更新通知后向控制实体 NCS2发 送更新成功消息。
如果 MSS1有 TGW, 且媒体路径 3中的 TGW都不与 MSS2共享, 则 执行后续步驟 515~步驟 517, 否则通过重用媒体路径 3中的部分连接, 并 由 MSS2通过步驟 504和步驟 507,或步驟 504和步驟 514在内部建立 IGW 与共享 TGW间的媒体连接, 实现 RNS2与 MSS2间的媒体连接。
步驟 515 ,控制实体 NCS2请求 RNS2更新媒体连接, 比如发送 Modify Bearer Request消息, 携带 MSS2的一个或多个连接信息;
步驟 516, RNS2同意更新, 比如发送 Modify Bearer Response消息, 消息中携带 RNS2的连接信息;
步驟 517 , 控制实体 NCS2向 MSS2发送更新通知, 比如发送 Modify Bearer Response消息, 消息中携带 RNS2的连接信息。
至此, RNS2与 MSS2间建立起新的媒体连接 5 , UTS可以通过媒体连 接 5和媒体连接 4构成的媒体路径与远端继续进行业务。
图 6为本发明实施例五的分组交换移动接入网触发媒体重定向的方法 的流程图, 如图 6所示, 本示例描述了当 UTS进行媒体交换类业务时, 发 起媒体重定向操作的情况, 其中 MSS1为源媒体交换系统, MSS2为目标媒 体交换系统, 其步驟如下:
步驟 600, 与图 2的步驟 200相同;
步驟 601 , NCS决定更新 UTS的移动接入网路由, 比如 MSS1的负载 过大, 需要换到由 MSS2提供媒体交换, 或者 UTS的接入位置更适合使用 MSS2提供媒体交换, 或者接收到 UTS的请求后决定使用 MSS2提供媒体 交换等情况;
步驟 602~步驟 607 , 与图 2的步驟 204~步驟 209相同;
本示例中, 步驟 604 中建立的转发连接即为第一承载连接, 另外的连 接即为第二承载连接。 本示例中, 第二承载连接为 RNS到目标 MSS之间 的媒体连接。
本示例中, 步驟 606中创建的转发连接即为第一承载连接。 本示例中, 第一承载连接也可通过步驟 602~605以隐式方式创建。
步驟 608~步驟 610, 与图 2的步驟 213~步驟 215相同;
如果 MSS1有 TGW, 且媒体路径 1中的 TGW都不与 MSS2共享, 则 执行后续步驟 611~步驟 613 , 否则通过重用媒体路径 1 中的部分连接, 并 由 MSS2通过步驟 602和步驟 605在内部建立 IGW与共享 TGW间的媒体 连接, 实现 RNS与 MSS2间的媒体连接。 步驟 611 ,可选地, NCS请求 RNS更新媒体连接,比如发送 Modify Bearer Request消息, 携带 MSS2的一个或多个连接信息;
步驟 612 , RNS同意更新, 比如发送 Modify Bearer Response消息, 携 带 RNS2的连接信息;
步驟 613,可选地, NCS向 MSS2发送更新通知,比如发送 Modify Bearer
Request消息, 携带 RNS的连接信息;
至此, RNS与 MSS2间建立起新的媒体连接 3。
步驟 614, 与图 2中的步驟 221相同。
至此, 新的媒体连接 4建立起来, UTS可以通过媒体连接 3和媒体连 接 4构成的媒体路径与远端继续进行业务。
图 7为本发明实施例的路由更新通知流程图, 如图 7所示, 本示例描 述了 MSS通知 SA更新业务路由的情况, 其步驟如下:
步驟 701 , MSS向 SA发送 IP信息, 此 IP信息使得远端更新完成后发 送给此 IP信息的数据都会经过此 MSS, 还携带从 UTS上下文信息中获取 的指示 UTS的信息, 比如针对 UTS的 IP信息或 IMSI。
SA根据所接收到的 IP信息, 实现媒体重定向。
如果 UTS上下文信息中不包含 SA地址信息,则 MSS可以通过路由更 新准备过程获得 SA地址信息, 还可通过预配置方式获得 SA地址信息。
图 8为本发明实施例的路由更新通知的另一种流程图, 如图 8所示, 本示例描述了 MSS通知 SA更新业务路由的情况, 主要包括以下步驟: 步驟 801 , MSS向 PDS发送 IP信息, 此 IP信息使得远端更新完成后 发送给此 IP信息的数据都会经过此 MSS, 还携带从 UTS上下文信息中获 取的指示 UTS的信息, 比如针对 UTS的 IP信息或 IMSI;
步驟 802, PDS向 SA发送此 IP信息。
SA根据所接收到的 IP信息, 实现媒体重定向。 如果 UTS上下文信息中不包含 SA地址信息,则 MSS可以通过路由更 新准备过程获得 SA地址信息, 还可通过预配置方式获得 SA信息, 还可不 需要 SA信息, 而由 PDS根据指示 UTS的信息查询到 SA信息。
本发明还记载了一种分组交换移动接入网重定向的系统, 包括所述 PS 移动接入网的 NCS, UTS, RNS或源 MSS, 目标 MSS, 以及业务网的 SA, 其中,
NCS , 用于请求目标 MSS为 UTS创建第一承载连接;
目标 MSS, 用于向业务适配功能 SA发送 IP信息;
源 MSS , 用于将接收到的来自所述第一承载连接的媒体数据转发给所 述 UTS; 或者, 将接收到的所述 UTS的媒体数据通过所述第一承载连接转 发给所述目标 MSS;
RNS, 用于将接收到的所述 UTS的媒体数据通过所述第一承载连接转 发给所述目标 MSS。
本领域技术人员应当理解,本发明对现有的 PS移动接入网的结构并无 更改, 因此, 相关网元及其结构, 可参见前述图 1所示的系统架构而理解。 以下, 重点对其功能作了改进的网元所实现的新功能及其与其他网元实现 的交互进行描述。
其中, 所述第一承载连接为所述目标 MSS与所述源 MSS之间的媒体 连接;
或者, 所述第一承载连接为所述目标 MSS与 RNS之间的媒体连接。 其中, 所述 NCS请求目标 MSS为 UTS创建第一承载连接之前, 所述
NCS还用于, 接收切换请求, 并执行切换操作。
其中, 所述 NCS还用于, 请求所述目标 MSS为所述 UTS创建第二承 载连接;
所述目标 MSS还用于, 连接所述第二承载连接和所述第一承载连接。 其中, 所述 NCS还用于, 请求所述源 MSS创建与 RNS的第三承载连 接, 所述源 MSS将接收到的来自所述第三承载连接的媒体数据通过所述第 一承载连接转发给所述目标 MSS。
其中, 所述 NCS还用于, 获取所述 UTS的上下文信息, 并向所述目标 MSS发送创建连接消息, 其中, 所述创建连接消息中携带有所述 UTS的上 下文信息, 所述上下文信息至少包括以下信息的至少一个:
UTS的标识信息和 UTS的 IP信息。
其中, 所述目标 MSS还用于, 直接或通过策略分发系统 PDS向所述 SA发送 IP信息。
其中, 所述 NCS请求目标 MSS为 UTS创建第一承载连接之前, 所述 NCS还用于, 根据所述 UTS的接入位置, 或源 MSS的状况, 或所述 UTS 的请求, 确定所述目标 MSS。
图 9为本发明实施例的分组交换移动接入网触发媒体重定向的目标媒 体交换系统 MSS装置的组成结构示意图, 如图 9所示, 本示例的分组交换 移动接入网触发媒体重定向的目标媒体交换系统 MSS 装置包括接收单元 90、 发送单元 91 , 其中:
接收单元 90, 用于接收来自 NCS的为 UTS创建第一承载连接的请求; 发送单元 91 , 用于向 SA发送 IP信息。
上述发送单元 91向 SA发送 IP信息为通过策略分发系统 PDS向所述 SA发送 IP信息。
本领域技术人员应当理解, 上述分组交换移动接入网触发媒体重定向 的目标媒体交换系统 MSS装置中的各处理单元的实现功能可参照前述分组 交换移动接入网触发媒体重定向的方法的相关描述而理解。 本领域技术人 员应当理解, 上述各处理单元的功能可通过运行于处理器上的程序而实现, 也可通过具体的逻辑电路而实现。 图 10为本发明实施例的分组交换移动接入网触发媒体重定向的网络控 制系统 NCS 装置的组成结构示意图, 其中, 所述装置包括第一请求单元 1001 :
第一请求单元 1001 , 用于请求目标 MSS为 UTS创建第一承载连接。 在图 10为本发明实施例的分组交换移动接入网触发媒体重定向的网络 控制系统 NCS装置的基础上, 所述装置还包括第二请求单元 1002:
第二请求单元 1002, 用于请求所述目标 MSS为所述 UTS创建第二承 载连接, 所述第二承载连接通过所述目标 MSS和所述第一承载连接相连; 或
第二请求单元 1002, 用于请求源 MSS创建与 RNS的第三承载连接, 所述第三承载连接中的媒体数据由所述源 MSS通过所述第一承载连接转发 给所述目标 MSS。
在图 10为本发明实施例的分组交换移动接入网触发媒体重定向的网络 控制系统 NCS装置的基础上,所述装置还包括获取单元(图 10中未示出): 获取单元, 用于获取所述 UTS的上下文信息, 所述上下文信息至少包 括 UTS的标识信息和 UTS的 IP信息中的至少一个, 所述上下文信息被所 述第一请求单元使用。
在图 10为本发明实施例的分组交换移动接入网触发媒体重定向的网络 控制系统 NCS装置的基础上,所述装置还包括确定单元(图 10中未示出): 确定单元, 用于根据所述 UTS的接入位置, 或源 MSS的状况, 或所述 UTS的请求, 确定所述目标 MSS。
本领域技术人员应当理解, 上述分组交换移动接入网触发媒体重定向 的网络控制系统 NCS装置中的各处理单元的实现功能可参照前述分组交换 移动接入网触发媒体重定向的方法的相关描述而理解。 本领域技术人员应 当理解, 上述各处理单元的功能可通过运行于处理器上的程序而实现, 也 可通过具体的逻辑电路而实现。
以上所述, 仅为本发明的较佳实施例而已, 并非用于限定本发明的保 护范围。
工业实用性
本发明通过 NCS请求目标 MSS为用户终端系统 UTS创建第一承载连 接; 目标 MSS向 SA发送 IP信息; 源 MSS将接收到的来自所述第一承载 连接的媒体数据转发给所述 UTS; 或者, 源 MSS或无线节点系统 RNS将 接收到的所述 UTS 的媒体数据通过所述第一承载连接转发给所述目标 MSS, 能及时对 UTS重定位, 从而能及时触发优化 PS移动接入网中 UTS 接入路由, 不会导致多媒体业务流的迂回。

Claims

权利要求书
1、 一种分组交换移动接入网触发媒体重定向的方法, 其中, 所述方法 包括:
网络控制系统 NCS请求目标媒体交换系统 MSS为用户终端系统 UTS 创建第一承载连接;
所述目标 MSS向业务适配功能 SA发送 IP信息;
源 MSS 将接收到的来自所述第一承载连接的媒体数据转发给所述 UTS; 或者, 源 MSS或无线节点系统 RNS将接收到的发往所述 UTS的媒 体数据通过所述第一承载连接转发给所述目标 MSS。
2、 根据权利要求 1所述的方法, 其中, 所述第一承载连接为所述目标 MSS与所述源 MSS之间的媒体连接。
3、 根据权利要求 1所述的方法, 其中, 所述第一承载连接为所述目标 MSS与 RNS之间的媒体连接。
4、 根据权利要求 1 所述的方法, 其中, 所述 NCS请求目标 MSS为 UTS创建第一承载连接之前, 所述方法还包括:
所述 NCS接收到切换请求。
5、 根据权利要求 4所述的方法, 其中, 所述方法还包括:
所述 NCS执行切换操作。
6、 根据权利要求 1所述的方法, 其中, 所述方法还包括:
所述 NCS请求所述目标 MSS为所述 UTS创建第二承载连接, 所述目 标 MSS连接所述第二承载连接和所述第一承载连接。
7、 根据权利要求 1所述的方法, 其中, 所述方法还包括:
所述 NCS请求所述源 MSS创建与 RNS的第三承载连接,所述源 MSS 将接收到的来自所述第三承载连接的媒体数据通过所述第一承载连接转发 给所述目标 MSS。
8、 根据权利要求 1 所述的方法, 其中, 所述 NCS请求目标 MSS为 UTS创建第一承载连接为:
所述 NCS获取所述 UTS的上下文信息, 并向所述目标 MSS发送创建 连接消息, 其中, 所述创建连接消息中携带有所述 UTS的上下文信息, 所 述上下文信息至少包括以下信息的至少一个:
UTS的标识信息和 UTS的 IP信息。
9、 根据权利要求 1所述的方法, 其中, 所述目标 MSS向 SA发送 IP 信息为:
所述目标 MSS直接或通过策略分发系统 PDS向所述 SA发送 IP信息。
10、 根据权利要求 1所述的方法, 其中, 所述 NCS请求目标 MSS为 UTS创建第一承载连接之前, 所述方法还包括:
所述 NCS根据所述 UTS的接入位置, 或源 MSS的状况, 或所述 UTS 的请求, 确定所述目标 MSS。
11、 一种分组交换移动接入网触发媒体重定向的系统, 包括所述 PS移 动接入网的 NCS, UTS, RNS或源 MSS, 目标 MSS, 以及业务网的 SA, 其中:
NCS , 用于请求目标 MSS为 UTS创建第一承载连接;
目标 MSS, 用于向业务适配功能 SA发送 IP信息;
源 MSS , 用于将接收到的来自所述第一承载连接的媒体数据转发给所 述 UTS; 或者, 将接收到的发往所述 UTS的媒体数据通过所述第一承载连 接转发给所述目标 MSS;
RNS, 用于将接收到的所述 UTS的媒体数据通过所述第一承载连接转 发给所述目标 MSS。
12、 根据权利要求 11所述的系统, 其中, 所述第一承载连接为所述目 标 MSS与所述源 MSS之间的媒体连接; 或者, 所述第一承载连接为所述目标 MSS与 RNS之间的媒体连接。
13、 根据权利要求 11所述的系统, 其中, 所述 NCS请求目标 MSS为 UTS创建第一承载连接之前, 所述 NCS还用于, 接收切换请求。
14、 根据权利要求 13所述的系统, 其中, 所述 NCS还用于, 执行切 换操作。
15、 根据权利要求 11所述的系统, 其中,
所述 NCS还用于,请求所述目标 MSS为所述 UTS创建第二承载连接; 所述目标 MSS还用于, 连接所述第二承载连接和所述第一承载连接。
16、 根据权利要求 11所述的系统, 其中:
所述 NCS还用于, 请求所述源 MSS创建与 RNS的第三承载连接, 所 述源 MSS将接收到的来自所述第三承载连接的媒体数据通过所述第一承载 连接转发给所述目标 MSS。
17、 根据权利要求 11所述的系统, 其中:
所述 NCS还用于, 获取所述 UTS的上下文信息, 并向所述目标 MSS 发送创建连接消息, 其中, 所述创建连接消息中携带有所述 UTS的上下文 信息, 所述上下文信息至少包括以下信息的至少一个:
UTS的标识信息和 UTS的 IP信息。
18、 根据权利要求 11所述的系统, 其中:
所述目标 MSS还用于, 直接或通过策略分发系统 PDS向所述 SA发送 IP信息。
19、 根据权利要求 11所述的系统, 其中, 所述 NCS请求目标 MSS为 UTS创建第一承载连接之前, 所述 NCS还用于, 根据所述 UTS的接入位 置, 或源 MSS的状况, 或所述 UTS的请求, 确定所述目标 MSS。
20、 一种分组交换移动接入网触发媒体重定向的目标媒体交换系统 MSS装置, 所述装置包括接收单元、 发送单元, 其中: 接收单元, 用于接收来自 NCS的为 UTS创建第一承载连接的请求; 发送单元, 用于向 SA发送 IP信息。
21、 根据权利要求 20所述的装置, 其中, 所述发送单元向 SA发送 IP 信息为通过策略分发系统 PDS向所述 S A发送 IP信息。
22、 一种分组交换移动接入网触发媒体重定向的网络控制系统 NCS装 置, 其中, 所述装置包括第一请求单元:
第一请求单元, 用于请求目标 MSS为 UTS创建第一承载连接。
23、 根据权利要求 22所述的装置, 其中, 所述装置还包括第二请求单 元:
第二请求单元,用于请求所述目标 MSS为所述 UTS创建第二承载连接, 所述第二承载连接通过所述目标 MSS和所述第一承载连接相连; 或
第二请求单元, 用于请求源 MSS创建与 RNS的第三承载连接, 所述 第三承载连接中的媒体数据由所述源 MSS通过所述第一承载连接转发给所 述目标 MSS。
24、 根据权利要求 22所述的装置, 其中, 所述装置还包括获取单元: 获取单元, 用于获取所述 UTS的上下文信息, 所述上下文信息至少包 括 UTS的标识信息和 UTS的 IP信息中的至少一个, 所述上下文信息被所 述第一请求单元使用。
25、 根据权利要求 22所述的装置, 其中, 所述装置还包括确定单元: 确定单元, 用于根据所述 UTS的接入位置, 或源 MSS的状况, 或所述
UTS的请求, 确定所述目标 MSS。
PCT/CN2012/077370 2011-07-28 2012-06-21 分组交换移动接入网触发媒体重定向的方法及系统、mss装置、ncs装置 WO2013013546A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201110213892.XA CN102905331B (zh) 2011-07-28 2011-07-28 分组交换移动接入网触发媒体重定向的方法及系统
CN201110213892.X 2011-07-28

Publications (1)

Publication Number Publication Date
WO2013013546A1 true WO2013013546A1 (zh) 2013-01-31

Family

ID=47577316

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2012/077370 WO2013013546A1 (zh) 2011-07-28 2012-06-21 分组交换移动接入网触发媒体重定向的方法及系统、mss装置、ncs装置

Country Status (2)

Country Link
CN (1) CN102905331B (zh)
WO (1) WO2013013546A1 (zh)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101217798A (zh) * 2008-01-09 2008-07-09 中兴通讯股份有限公司 一种在ip多媒体子系统中控制本地转出的方法
CN101227720A (zh) * 2008-01-09 2008-07-23 中兴通讯股份有限公司 一种ip多媒体子系统的本地转出控制方法
CN101507308A (zh) * 2006-08-16 2009-08-12 艾利森电话股份有限公司 用于一隧道解决方案的ggsn代理

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101552978B (zh) * 2008-03-31 2011-04-13 华为技术有限公司 实现路由优化的方法、系统及装置
CN102111919B (zh) * 2009-12-24 2014-06-11 中兴通讯股份有限公司 本地ip网络连接管理方法、装置和系统

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101507308A (zh) * 2006-08-16 2009-08-12 艾利森电话股份有限公司 用于一隧道解决方案的ggsn代理
CN101217798A (zh) * 2008-01-09 2008-07-09 中兴通讯股份有限公司 一种在ip多媒体子系统中控制本地转出的方法
CN101227720A (zh) * 2008-01-09 2008-07-23 中兴通讯股份有限公司 一种ip多媒体子系统的本地转出控制方法

Also Published As

Publication number Publication date
CN102905331A (zh) 2013-01-30
CN102905331B (zh) 2018-05-15

Similar Documents

Publication Publication Date Title
US11690130B2 (en) Network initiated release assistance information
US10841858B2 (en) Data processing method and system
US8165053B2 (en) Method for supporting MBMS service transmission in LTE system
US7733824B2 (en) Fixed access point for a terminal device
US20100208704A1 (en) Data Processing Method and Device
WO2009094916A1 (fr) Procédé, système et dispositif de commande pour redémarrage après défaillance dans le domaine circuit
WO2008000130A1 (en) Method and system for realizing multicast service of multimedia broadcast
WO2007147345A1 (fr) Procédé de sélection d'entité plan utilisateur du côté réseau et d'entité plan contrôle
WO2007006227A1 (fr) Procédé et système de négociation destinés à l’établissement de chemins de données d’interface
WO2009069877A1 (en) Mobile communication system and tunnel management method thereof
WO2012097509A1 (zh) 切换方法和移动管理网元
WO2017201903A1 (zh) 数据业务控制方法及相关设备
WO2010108420A1 (zh) 通信业务切换处理方法、网络系统与互通功能实体
WO2010006531A1 (zh) 隧道管理方法、装置及通信系统
WO2010124551A1 (zh) 在多接入场景下分组数据网络网关标识的保存方法及系统
WO2011143997A1 (zh) 一种实现路由选择的方法和装置
JP2020501410A (ja) データパケット処理方法、制御プレーンネットワーク要素、及びユーザプレーンネットワーク要素
KR101384697B1 (ko) 통신 접속을 제공하기 위한 방법 및 통신 엔티티
WO2014059647A1 (zh) 一种数据域业务处理方法、装置及系统
WO2016163416A1 (ja) 端末装置、pgw及びmme
WO2010004714A1 (ja) ハンドオーバ処理方法、その方法で用いられる移動端末及び通信管理装置
WO2009149656A1 (zh) 一种实现业务切换的方法、装置及系统
WO2011137715A1 (zh) 单信道语音连续性实现方法及系统
WO2012028071A1 (zh) 一种查询本地网关的方法和系统
US20080219271A1 (en) IP multicast based systems, apparatuses and methods for TCP connection migration

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12818137

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12818137

Country of ref document: EP

Kind code of ref document: A1