CN102469082B - A kind of path switching method and device, system - Google Patents
A kind of path switching method and device, system Download PDFInfo
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- CN102469082B CN102469082B CN201010541485.7A CN201010541485A CN102469082B CN 102469082 B CN102469082 B CN 102469082B CN 201010541485 A CN201010541485 A CN 201010541485A CN 102469082 B CN102469082 B CN 102469082B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/22—Alternate routing
Abstract
The invention discloses a kind of path switching method, described method comprises: after the path handover request receiving the initiation of the network element in current sessions, and core network control node obtains end-to-end path quality and the core-network side path quality of current sessions; Described core network control node according to the end-to-end path quality of accessed current sessions, with core-network side path quality, determine the deterioration reason in current sessions path; According to the deterioration reason in the current sessions path determined, described core Controlling vertex refuses described path handover request, or is current sessions re-constructing media transmission path.The invention also discloses a kind of path switching device and system, the path quality that the path quality that Access Network can be caused worsens, cause with core net worsens and makes a distinction, guarantee to improve end-to-end path quality by toggle path, thus effectively improve the efficiency that path switching improves path quality, and effectively improve Consumer's Experience.
Description
Technical field
The present invention relates to the trail protection technology of communications field IP bearer network, particularly relate to a kind of path switching method and device, system.
Background technology
The fast development of the communication technology brings the renewal day by day of communication network, but the high reliability of network is the performance requirement of the most basic most critical all the time.For reaching the various performance index in business, IP bearer network introduces multiple resist technology to monitor bearer network situation with link equipment, path, network etc. are at all levels, finds that faulty equipment walking along the street footpath of going forward side by side switches.
Network architecture under a kind of common-mode of the trail protection technology of IP bearer network; as shown in Figure 1; wherein; dotted line represents the transmission path of signaling flow between terminal equipment A (UE_A) and terminal equipment B (UE_B), and solid line represents the transmission path of Media Stream between UE_A and UE_B.UE_A and UE_B, under the assistance of core network control node, sets up medium surface transmission path by access network node A1, media device 1, access network node B1.Be deteriorated when UE_A or UE_B perceives QoS in conversation procedure, will to core network control node initiation session handover request, core network control node is that UE_A and UE_B consults media transmission path again, and final UE_A and UE_B sets up new medium surface transmission path by access network node A1, media device 2, access network node B1.
The specific implementation process that between above-mentioned UE_A and UE_B, path switches, as shown in Figure 2, mainly comprises the following steps:
S201) UE_A and UE_B carries out multimedia communication by access network node A1, media device 1, access network node B1;
S202) UE_A perception quality of the conversation is deteriorated, and sends path replacement request to core network control node;
Particularly, UE_A can the end-to-end path quality of perception current path, when the end-to-end path perceiving current path is second-rate, sends path replacement request to core network control node.
S203) after core network control node receives the path replacement request of UE_A transmission, according to the load condition of media device each in core net, reselect media device 2 as the relaying between UE_A and UE_B, for UE_A and UE_B sets up new media path, core network control node and media device 2 alternately, are current sessions reserve media resource;
S204) core network control node and the UE_B media information that conversates alternately upgrades;
S205) core network control node returns media path renewal response to UE_A;
S206) UE_A and UE_B is by access network node A1, media device 2, access network node B1, proceeds multimedia communication;
S207) core network control node and media device 1 are alternately, the resource that release current sessions takies on media device 1, complete current path and switch.
Along with the develop rapidly of terminal equipment and access network technology, multi-mode terminal equipment, plurality of access modes make Access Network network become increasingly complex, and cause in conversation procedure that bearer path is complicated end to end.And although above-mentioned path handover scheme can ensure the actuate path switching flow when path quality worsens end to end, and core network control node is after receiving path handover request, before not finding the reason causing path quality to worsen in current end-to-end path, with regard to direct according to the media device load condition in current core net, for UE selects new media device, and re-establish media path.Like this, if when the path due to terminal equipment Access Network part is worsened and causes the path quality of current end-to-end path to worsen, core network control node still adopts such scheme to carry out path switching, end-to-end path after switching may quality also be poor, to such an extent as to fails to reach the object improving end-to-end path quality.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of path switching method and device, system, to solve existing path handover scheme can not carry out path switching problem for the reason of current end-to-end path deterioration.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides a kind of path switching method, described method comprises: after the path handover request receiving the initiation of the network element in current sessions, and core network control node obtains end-to-end path quality and the core-network side path quality of current sessions; Described core network control node according to the end-to-end path quality of accessed current sessions, with core-network side path quality, determine the deterioration reason in current sessions path; According to the deterioration reason in the current sessions path determined, described core Controlling vertex refuses described path handover request, or is current sessions re-constructing media transmission path.
In such scheme, the network element of described initiation path handover request is specially: the terminal equipment on current sessions path or media gateway or media relays equipment.
In such scheme, described core network control node obtains the end-to-end path quality in current sessions path, is specially: described network element obtains the end-to-end path quality of current sessions, and is carried to described core network control node by described path handover request; Or described core network control node is initiatively to the end-to-end path quality of the terminal equipment inquiry current sessions of current sessions.
In such scheme, described core network control node obtains the core-network side path quality of current sessions, is specially: core network control node is by the path quality to core-network side on agent node management server queries current sessions path.
In such scheme, described core network control node according to the end-to-end path quality of accessed current sessions, with core-network side path quality, determine the deterioration reason in current sessions path, be specially: the end-to-end path quality of accessed current sessions and core-network side path quality compare by described core network control node, if both differences meet default path quality threshold requirement, then determine that the deterioration in current sessions path is caused by core-network side path; If both differences do not meet default path quality threshold requirement, then determine that the deterioration in current sessions path is caused by Access Network side path.
In such scheme, according to the deterioration reason in the current sessions path determined, described core Controlling vertex refuses described path handover request, or be current sessions re-constructing media transmission path, specifically comprise: when determining that the deterioration in current sessions path is caused by core-network side path, described core network control node is current sessions gravity treatment media device, and notifies that the terminal equipment on current sessions is switched on the media device of gravity treatment, is current sessions re-constructing media transmission path; When determining that the deterioration in current sessions path is caused by Access Network side path, described core network control node sends refuse information to the network element of described initiation path handover request, refuses described path handover request; Or described core network control node is current sessions gravity treatment access network node, and notifying that the terminal equipment on current sessions path is switched on gravity treatment access network node, is current sessions re-constructing media transmission path.
In such scheme, when determining that the deterioration in current sessions path is caused by Access Network side path, described core network control node refuses described path handover request, specifically comprise: in a case where, core network control node sends refuse information to the network element of described initiation path handover request, refuses described path handover request: core network control node fails the Access Network information of two terminal equipments on the current sessions that gets; Or core network control node is according to the Access Network information of two terminal equipments on the current sessions got, and on energy perception current sessions path, two terminal equipments all do not have other available access networks nodes; Or, other available access networks nodes of two terminal equipments on the current sessions path perceived, all not allow by the switchover policy that configured.
In such scheme, when determining that the deterioration in current sessions path is caused by Access Network side path, described core network control node is current sessions gravity treatment access network node, and notify that the terminal equipment on current sessions path is switched on gravity treatment access network node, for current sessions re-constructing media transmission path, specifically comprise: described core network control node can get the Access Network information of two terminal equipments on current sessions path, and according to accessed Access Network information, the access network node when any one terminal equipment or two terminal equipments have other available on session path can be felt, then in other available access networks nodes of institute's perception, for one or two access network node of current sessions gravity treatment, and notify that the terminal equipment on current sessions is switched on the access network node of gravity treatment, for current sessions re-constructing media transmission path.
Present invention also offers a kind of path switching device, described device comprises: acquiring unit, determining unit and motor unit, wherein, acquiring unit, for after the path handover request receiving the initiation of the network element in current sessions, obtain end-to-end path quality and the core-network side path quality of current sessions; Determining unit, for the current sessions that gets according to described acquiring unit end-to-end path quality, with core-network side path quality, determine the deterioration reason in current sessions path; Motor unit, for the deterioration reason in current sessions path determined according to described determining unit, refuses described path handover request, or is current sessions re-constructing media transmission path.
In such scheme, described acquiring unit comprises the first acquisition module and the second acquisition module, wherein, first acquisition module, for being obtained the end-to-end path quality of current sessions by the network element of described initiation path handover request, or by inquiring about the end-to-end path quality of current sessions to the terminal equipment of current sessions; Second acquisition module, for passing through the path quality to core-network side on agent node management server queries current sessions path.
In such scheme, described determining unit, specifically for, end-to-end path quality and the core-network side path quality of the current sessions got by described acquiring unit compare, if both differences meet default path quality threshold requirement, then determine that the deterioration in current sessions path is caused by core-network side path; If both differences do not meet default path quality threshold requirement, then determine that the deterioration in current sessions path is caused by Access Network side path; And determined current sessions path deterioration reason is sent to described motor unit.
In such scheme, described motor unit, specifically for, receive the current sessions path deterioration reason that described determining unit sends; When the current sessions path deterioration reason received is core-network side path, being current sessions gravity treatment media device, and notifying that the terminal equipment on current sessions is switched on the media device of gravity treatment, is current sessions re-constructing media transmission path; When the current sessions path deterioration reason received is Access Network side path, the network element to described initiation path handover request sends refuse information, refuses described path handover request; Or being current sessions gravity treatment access network node, and notifying that the terminal equipment on current sessions path is switched on gravity treatment access network node, is current sessions re-constructing media transmission path.
Present invention also offers a kind of path switching system, described system comprises: terminal equipment, access network node, core network control node and media device, wherein, core network control node comprises: acquiring unit, determining unit and motor unit, wherein, acquiring unit, for after the path handover request receiving the initiation of the network element in current sessions, obtains end-to-end path quality and the core-network side path quality of current sessions; Determining unit, for the current sessions that gets according to described acquiring unit end-to-end path quality, with core-network side path quality, determine the deterioration reason in current sessions path; Motor unit, for the deterioration reason in current sessions path determined according to described determining unit, refuses described path handover request, or is current sessions re-constructing media transmission path.
In such scheme, described system also comprises: agent node management server, and the acquiring unit of described core network control node is by obtaining the path quality of core-network side on current sessions path to this agent node management server queries.
Path switching method provided by the present invention and device, according to the end-to-end path quality in obtained current sessions path, and core-network side path quality, determine the reason that current sessions path is worsened, in the reason worsened for current sessions path, take corresponding path handover operation, thus the path quality that Access Network can be caused worsens, the path quality caused with core net worsens and makes a distinction, and carry out more reasonably path hand-off process according to different path quality deterioration reasons, guarantee to improve end-to-end path quality by toggle path, thus effectively improve the efficiency that path switching improves path quality, and effectively improve Consumer's Experience.
Accompanying drawing explanation
Fig. 1 is the schematic network structure that footpath, prior art Road switches;
Fig. 2 is the realization flow schematic diagram of path switching method in prior art;
Fig. 3 is the realization flow figure of path switching method of the present invention;
Fig. 4 is a kind of schematic network structure of path switching device of the present invention;
Fig. 5 is the flow chart of the path switching method of the embodiment of the present invention one;
Fig. 6 is the flow chart of the path switching method of the embodiment of the present invention two;
Fig. 7 is the flow chart of the path switching method of the embodiment of the present invention three;
Fig. 8 is the flow chart of the path switching method of the embodiment of the present invention four;
Fig. 9 is the flow chart of the path switching method of the embodiment of the present invention five.
Embodiment
Basic thought of the present invention is: the end-to-end path quality of core network control node according to current sessions and the core network path quality of current sessions, determines the path quality deterioration reason of current sessions; And according to the path deterioration reason determined, carry out corresponding path hand-off process.
Path switching method of the present invention, with reference to shown in Fig. 3, mainly comprises:
Step 301: after the path handover request receiving the initiation of the network element in current sessions, core network control node obtains end-to-end path quality and the core-network side path quality of current sessions;
Here, the described network element of initiating path handover request can be specifically terminal equipment, also can be other media device on current sessions path, as media gateway, media relays equipment etc.
Here, above-mentioned path quality specifically can comprise the MOS value in path, packet loss, time delay, shake isoparametric one or more.
Step 302: described core network control node according to the end-to-end path quality of accessed current sessions, with core-network side path quality, determine the deterioration reason in current sessions path;
Step 303: according to the deterioration reason in the current sessions path determined, described core Controlling vertex refuses described path handover request, or is current sessions re-constructing media transmission path.
Wherein, core network control node obtains the process of the end-to-end path quality in current sessions path, Ke Yishi: described network element obtains the end-to-end path quality of current sessions, and is carried to described core network control node by described path handover request; Or described core network control node is initiatively to the end-to-end path quality of the terminal equipment inquiry current sessions of current sessions.
Wherein, core network control node obtains the process of the core-network side path quality of current sessions, can be specifically: core network control node is by the path quality to core-network side on agent node management server queries current sessions path.
Particularly, core network control node is to agent node management server transmit path quality inquiry request, this inquiry request contains the nodal information wanting query path, agent node management server is according to described path quality inquiry request, measure the path quality wanting query path, and report described core network control node.
Here, agent node management server is according to the nodal information wanting query path comprised in described path quality inquiry request, find the agent node near wanting each node in query path, measure the path quality of the proxy path be made up of found each agent node, and the path quality of measured proxy path is reported core network control node as wanting the path quality of query path.
Wherein, described core network control node according to the end-to-end path quality of accessed current sessions, with core-network side path quality, determine the deterioration reason in current sessions path, be specially: the end-to-end path quality of accessed current sessions and core-network side path quality compare by described core network control node, if both differences meet default path quality threshold requirement, then determine that the deterioration in current sessions path is caused by core-network side path; If both differences do not meet default path quality threshold requirement, then determine that the deterioration in current sessions path is caused by Access Network side path.
Particularly, the current path quality got can comprise the MOS value in path, packet loss, time delay, shake isoparametric one or more, arranging of described path quality threshold value can be determined according to current path parameter that quality comprises, set path quality threshold value can be arranged respectively according to the parameter comprised in path quality, or carry out combination to arrange, such as, can be set to: path quality threshold requirement time delay difference is not more than 100ms and packet loss difference is not more than 3%.
When determining that the deterioration in current sessions path is caused by core-network side path, described core network control node is current sessions gravity treatment media device, and notify that the terminal equipment on current sessions is switched on the media device of gravity treatment, be current sessions re-constructing media transmission path.
When determining that the deterioration in current sessions path is caused by Access Network side path, described core network control node refuses described path handover request; Or described core network control node is current sessions gravity treatment access network node, and notifying that this terminal equipment is switched on gravity treatment access network node, is current sessions re-constructing media transmission path.
When determining that the deterioration in current sessions path is caused by Access Network side path, described core network control node refuses described path handover request, specifically can comprise:
In a case where, core network control node sends refuse information to the network element of described initiation path handover request, refuses described path handover request: core network control node fails the Access Network information of two terminal equipments on the current sessions that gets; Or core network control node is according to the Access Network information of two terminal equipments on the current sessions got, on energy perception current sessions path, two terminal equipments all do not have other available access networks nodes; Or other available access networks nodes of two terminal equipments on the current sessions path perceived, all not allow by the switchover policy that configured.
When determining that the deterioration in current sessions path is caused by Access Network side path, described core network control node is current sessions gravity treatment access network node, and notify that this terminal equipment is switched on gravity treatment access network node, for current sessions re-constructing media transmission path, specifically can comprise: described core network control node can get the Access Network information of two terminal equipments on current sessions path, and according to accessed Access Network information, the access network node when any one terminal equipment or two terminal equipments have other available on session path can be felt, then in other available access networks nodes of institute's perception, for one or two access network node of current sessions gravity treatment, and notify that the terminal equipment on current sessions is switched on the access network node of gravity treatment, for current sessions re-constructing media transmission path.
In order to realize said method, present invention also offers a kind of path switching device, it is characterized in that, described device comprises: acquiring unit, determining unit and motor unit, wherein, acquiring unit, for after the path handover request receiving the initiation of the network element in current sessions, obtains end-to-end path quality and the core-network side path quality of current sessions; Determining unit, for the current sessions that gets according to described acquiring unit end-to-end path quality, with core-network side path quality, determine the deterioration reason in current sessions path; Motor unit, for the deterioration reason in current sessions path determined according to described determining unit, refuses described path handover request, or is current sessions re-constructing media transmission path.
Wherein, described acquiring unit comprises the first acquisition module and the second acquisition module, wherein, first acquisition module, for being obtained the end-to-end path quality of current sessions by the network element of described initiation path handover request, or by inquiring about the end-to-end path quality of current sessions to the terminal equipment of current sessions; Second acquisition module, for passing through the path quality to core-network side on agent node management server queries current sessions path.
Wherein, described determining unit, specifically for, end-to-end path quality and the core-network side path quality of the current sessions got by described acquiring unit compare, if both differences meet default path quality threshold requirement, then determine that the deterioration in current sessions path is caused by core-network side path; If both differences do not meet default path quality threshold requirement, then determine that the deterioration in current sessions path is caused by Access Network side path; And determined current sessions path deterioration reason is sent to described motor unit.
Here, described motor unit, specifically for, receive the current sessions path deterioration reason that described determining unit sends; When the current sessions path deterioration reason received is core-network side path, being current sessions gravity treatment media device, and notifying that the terminal equipment on current sessions is switched on the media device of gravity treatment, is current sessions re-constructing media transmission path; When the current sessions path deterioration reason received is Access Network side path, the network element to described initiation path handover request sends refuse information, refuses described path handover request; Or being current sessions gravity treatment access network node, and notifying that the terminal equipment on current sessions path is switched on gravity treatment access network node, is current sessions re-constructing media transmission path.
Path switching device provided by the present invention, can be arranged in the core network control node of existing route switched system, also independently can be arranged in existing path switching system, be connected with other network elements in this system.
In addition, present invention also offers a kind of path switching system, this system mainly comprises: terminal equipment, access network node, core network control node, media device, and wherein, core network control node includes above-mentioned path switching device.
Wherein, described path switching system can also comprise: agent node management server, agent node management server, the acquiring unit of described core network control node is by obtaining the path quality of core-network side on current sessions path to this agent node management server queries.
Fig. 4 is a kind of specific embodiment of path switching system provided by the present invention, and this system mainly comprises: terminal equipment, access network node, core network control node, media device, agent node management server, agent node.
Wherein, core network control node includes path switching device provided by the present invention (not showing in Fig. 4), Signalling exchange and the media resource of setting up communication path between responsible terminal equipment control, can to the network quality of core-network side on agent node management server queries session path.In addition, core network control node can also obtain and preserve the Access Network information of terminal equipment.
Wherein, terminal equipment is specially the user terminal using Session Initiation Protocol, is specially UE_A, the UE_B shown in Fig. 4.
Access network node is the access device of terminal equipment to carrier network, and generally different Access Networks has different access nodes.A terminal equipment can have plurality of access modes, and corresponding different access network nodes, lists the access network node A1 of UE_A and the access network node B1 of access network node A2, UE_B and access network node B2 in Fig. 4.
Media device is responsible for forwarding media message between terminal equipment, between terminal equipment and media device, between media device.
Agent node management server, is in charge of the overlay network of agent node composition, comprises the management of network measure task between the keep-alive of agent node, agent node, the collection etc. of network quality measurement data.Agent node management server also provides query interface to core network control node, returns the network quality situation between specified network node.
Agent node, is positioned at network side, and the network equipment of close user's access node, control by agent node management server, and carry out network quality measurement between other agent node, and measurement result is reported agent node management server.
Wherein, media device and agent node can be Same Physical equipment, also can be different physical equipments.
Embodiment one
Present embodiment describes a kind of implementation procedure of carrying out path switching when causing current sessions path quality to be deteriorated because core-network side path quality worsens: UE_A and UE_B is by access network node A1, access network node B1 carries out multimedia communication, when UE_A perceives current sessions path quality variation, path handover request is initiated to core network control node, after core network control node receives described path handover request, get the end-to-end path quality in current sessions path, and core-network side path quality state, and judge that the end-to-end path quality in current sessions path and core-network side path quality are more or less the same, determine what the deterioration of current sessions path quality was caused by core net, now, core network control node can according to certain strategy, select one or more media device as relaying, and notify that current sessions is switched on the media device of gravity treatment by UE_A and UE_B, rebuild the media transmission path of UE_A and UE_B, complete path to switch.
As shown in Figure 5, the path switching flow of the present embodiment, specifically comprises the following steps:
S501) UE_A and UE_B carries out multimedia communication by access network node A1, access network node B1;
S502) UE_A perceives current sessions degradation, and when needing to carry out path switching, initiate path handover request to core network control node, described path request message carries the end-to-end path quality Q 1 in current sessions path;
Here, the process of UE_A perception current sessions degradation, can be specifically: UE_A obtains the quality of the conversation of current sessions in real time, detects that current sessions quality does not meet the quality of the conversation threshold requirement preset, then determine current sessions degradation, need to carry out path switching.
Here, described quality of the conversation can comprise voice MOS value, time delay, packet loss, shake isoparametric any one or combination in any, general speech service quality parameter request is that MOS value is greater than 3.5, time delay is less than 300ms, packet loss is less than 5% etc., can arrange corresponding quality of the conversation threshold value according to this requirement.Such as, can be set to: quality of the conversation threshold requirement MOS value is greater than 3.5 and/or time delay is less than 300ms and/or packet loss is less than 5%.
S503), after core network control node receives described path handover request, the core-network side path quality Q2 in current sessions path is obtained to agent node management server queries;
Here, the core-network side path in current sessions path specifically refers to an access the path between node A1, access node B1, and the core-network side path quality Q2 in described current sessions path specifically refers to an access the path quality in path between node A1, access node B1.
Particularly, core network control node can send inquiry request to agent node management server, two terminal point information wanting query path are carried in this inquiry request, i.e. access node A1, and the information such as the mark of access node B1 or address, after agent node management server receives this inquiry request, find out the agent node SA near access node A1, and near the agent node SB of access node B1, path quality between measurement agent node SA and agent node SB, and using the path quality Q2 of the path quality between the agent node SA that measures and agent node SB as path between access node A1 and access node B1, report described core network control node.
S504) the end-to-end path quality Q 1 of carrying in the handover request of described path compares with core-network side path quality Q2 by core network control node, obtain both differences and be not more than the path quality threshold value pre-set, then determine that current sessions path quality worsens to be caused by core net path, core network control node is that current sessions gravity treatment media device 1 is as relaying.
Here, core network control node can, according to the load condition of media device each in current core net, be current sessions gravity treatment media device, a media device can be selected, also can select multiple media device, detailed process is prior art, and the present invention no longer describes in detail simultaneously.
S505) core network control node and media device 1 carry out alternately, are current sessions reserve media resource;
Here, if core network control node is current sessions reselect multiple media device as relaying, then need to carry out resource reservation respectively to selected multiple media devices mutual.
S506) core network control node notice UE_B carries out media path renewal, and current sessions path is switched on media device 1 by notice UE_B;
S507) core Controlling vertex is to UE_A return path handoff response, and current sessions path is switched on media device 1 by notice UE_A, is current sessions re-constructing media transmission path;
S508) UE_A and UE_B proceeds multimedia communication by access network node A1, media device 1, access network node B1.
Embodiment two
Present embodiment describes the another kind of implementation procedure of carrying out path switching when causing current sessions path quality to be deteriorated because core-network side path quality worsens: UE_A and UE_B is by access network node A1, media device 1, access network node B1 carries out multimedia communication, UE_A perception current sessions path quality is deteriorated, then initiate path handover request to core network control node, after core network control node receives described path handover request, get the end-to-end path quality in current sessions path, and core-network side path quality state, and judge that the end-to-end path quality in current sessions path and core-network side path quality are more or less the same, determine what the deterioration of current sessions path quality was caused by core net, now, core network control node can according to certain strategy, for the one or more media device of current sessions gravity treatment is as relaying, and notify that current sessions is switched on the media device of gravity treatment by UE_A and UE_B, rebuild the media transmission path of UE_A and UE_B, complete path to switch.
As shown in Figure 6, the path switching flow of the present embodiment, specifically comprises the following steps:
S601, UE_A and UE_B carry out multimedia communication by access network node A1, media device 1, access network node B1;
S602, identical with step S502;
S603, substantially identical with step S503, difference is, in the present embodiment, the path of core side is specially the path between access node A1, media device 1, access node B1, and core network control node is specially the path quality between access node A1, media device 1, access node B1 to the core-network side path quality Q2 that agent node management service is inquired about;
Particularly, agent node management server is after receiving the inquiry request that core network control node sends, find the agent node SA near access node A1 and the agent node SB near access node B1, path quality between measurement agent node SA and media device 1 and the path quality between media device 1 and agent node SB, and using the path quality between agent node SA and media device 1 and the path quality sum between media device 1 and agent node SB as the path quality Q2 of core-network side, report core network control node;
S604) substantially identical with step S504, difference is, in the present embodiment, core net is that current sessions gravity treatment media device 2 is as relaying;
S605) core network control node and media device 2 carry out alternately, are current sessions reserve media resource;
S606) core network control node notice UE_B carries out media path renewal, and current sessions path is switched on media device 2 by notice UE_B;
S607) core Controlling vertex is to UE_A return path handoff response, and current sessions path is switched on media device 2 by notice UE_A, is current sessions re-constructing media transmission path;
S608) UE_A and UE_B proceeds multimedia communication by access network node A1, media device 2, access network node B1.
S609) core network control node and media device 1 carry out alternately, the media resource that release current sessions takies on media device 1.
Embodiment three
Present embodiment describes the another kind of implementation procedure of carrying out path switching when causing current sessions path quality to be deteriorated because core-network side path quality worsens: UE_A and UE_B is by access network node A1, media device 1, access network node B1 carries out multimedia communication, the media device 1 perception current sessions path quality of core net is deteriorated, path handover request is initiated to core network control node, after core network control node receives path handover request, obtain the end-to-end path quality in current sessions path, and core-network side path quality, determine that current sessions path quality worsens to be caused by core-network side path quality variation, and trigger corresponding path hand-off process flow process accordingly.
As shown in Figure 7, the path switching flow of the present embodiment, specifically comprises the following steps:
S701) identical with step S601;
S702) media device 1 on current sessions path perceives current sessions degradation, initiates path handover request to core network control node;
Here, media device can be core net media gateway or media relays equipment, perception current sessions quality can be carried out by the data transfer statistics result of current sessions, as added up the parameter such as packet loss and shake of the media message of current sessions, when quality of the conversation threshold value higher than setting of packet loss or shake, initiate path handover request.
S703), after core network control node receives described path handover request, the end-to-end path quality Q 1 in current sessions path is inquired about to UE_A;
S704) core network control node is to the core-network side path quality Q2 in agent node management server queries current sessions path;
Here, specific implementation process is identical with step 603.
S705) identical with step S604;
S706) identical with step S605;
S707) identical with step S606;
S708) core network control node notice UE_A carries out media path renewal, and current sessions path is switched on media device 1 by notice UE_A;
S709) identical with step S608; .
S710) identical with step S609.
Here, step S703 and step S704 can also carry out simultaneously, or, also first can perform step S704, then perform step S703.
Embodiment four
Present embodiment describes a kind of implementation procedure of carrying out path switching when causing current sessions path quality to be deteriorated because access network path quality worsens: UE_A and UE_B is by access network node A1, media device 1, access network node B1 carries out multimedia communication, wherein, described media device 1 may not exist as the media device of core-network side, also may exist one and more than, UE_A perception session path degradation, path handover request is initiated to core network control node, after core network control node receives described path handover request, obtain the end-to-end path quality in current sessions path, and core-network side path quality, obtain end-to-end path quality on current sessions path and be obviously worse than core-network side path quality, determine that current sessions path quality worsens to be caused by Access Network side path degradation, now, core network control node can select the path handover request refusing UE_A.
As shown in Figure 8, the path switching flow of the present embodiment, specifically comprises the following steps:
S801) identical with step S601;
S802) identical with step S602;
S803) identical with step S603;
S804) the end-to-end path quality Q 1 of carrying in the handover request of described path compares with core-network side path quality Q2 by core network control node, obtain both differences and be greater than the path quality threshold value pre-set, then determine that current sessions path quality worsens to be caused by Access Network path, core network control node determines the path handover request of refusal UE_A;
Wherein, core network control node in following several situation, can determine the path handover request of refusal terminal equipment:
The first: core network control node can carry out the multiple Access Network information of collection terminal equipment by many registrations of terminal equipment, according to the Access Network information of terminal equipment, whether perception terminal equipment also has other available access network nodes.Particularly, core network control node is according to the Access Network information of UE_A and UE_B, whether perception UE_A and UE_B has other available access network nodes, if UE_A and UE_B does not have available access network node, then determines the path handover request of refusal UE_A.
The second: operator is pre-configured switchover policy on core network control node, core network control node can according to configured switchover policy, determine the path handover request of refusal terminal equipment, such as, the switchover policy configured can be do not allow to be switched to one or more access network nodes of specifying, core network control node is according to the Access Network information of terminal equipment, after finding available access network node, if in unallowed one or more access network node that the access network node found just in time is specified in described switchover policy, then determine the path handover request of refusal terminal equipment.
The third, core network control node, when getting the Access Network information of terminal equipment, directly refuses the path handover request of terminal equipment.
S805) core network control node is to UE_A return path handoff response, carries the refuse information for refusing described path handover request in this path handoff response, and its path handover request of notice UE_A is rejected;
S806) keep current sessions path constant between UE_A and UE_B, continue through access network node A1, media device 1, access network node B1 carry out multimedia communication.
Embodiment five
Present embodiment describes the another kind of implementation procedure of carrying out path switching when causing current sessions path quality to be deteriorated because access network path quality worsens: UE_A and UE_B carries out multimedia communication by access network node A1, access network node B1.UE_A perception session path degradation, path handover request is initiated to core network control node, after core network control node receives described path handover request, obtain the end-to-end path quality in current sessions path, and core-network side path quality, obtain end-to-end path quality on current sessions path and be obviously worse than core-network side path quality, determine that current sessions path quality worsens to be caused by Access Network side path degradation, now, core network control node can notify UE_A and/or UE_B, be switched to other access network node, re-establish media transmission path.
As shown in Figure 9, the path switching flow of the present embodiment, specifically comprises the following steps:
S901) identical with step S501;
S902) identical with step S502;
S903) identical with step S503;
S904) the end-to-end path quality Q 1 of carrying in the handover request of described path compares with core-network side path quality Q2 by core network control node, obtain both differences and be greater than the path quality threshold value pre-set, then determine that current sessions path quality worsens to be caused by Access Network path, core network control node perceives the access network node that UE_A and/or UE_B also has other available, determine UE_A to be switched to new access network node A2, UE_B is switched to new access network node B2;
Particularly, core network control node, according to the Access Network information of UE_A and UE_B, perceives the access network node that UE_A and/or UE_B has other available, be then UE_A and/or UE_B gravity treatment access network node.
S905) core network control node notice UE_B is updated to the enterprising Serial Communication of access network node B2;
S906) core network control node is to UE_A return path handoff response, and notice UE_B is switched to the enterprising Serial Communication of access network node A2;
S907) UE_A and UE_B is by consulting with core network control node, is switched to access network node A2, access network node B2 respectively, proceeds multimedia communication by access network node A2, access network node B2.
In the present embodiment, when carrying out access point switching, can be UE_A and UE_B all gravity treatment access network nodes, and UE_A and UE_B is switched to the access network node of gravity treatment, also can only switch for wherein any one gravity treatment access node of UE_A and UE_B, in practical application, by core network control node according to themselves capture to the Access Network information of UE_A and UE_B determine whether gravity treatment access network node, and whether be switched to the access network node of gravity treatment, detailed process is prior art, those skilled in the art are according to this area common technology means, the prior art can be combined with the present invention, carry out realizing route to switch.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention, and all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (14)
1. a path switching method, is characterized in that, described method comprises:
After the path handover request receiving the initiation of the network element in current sessions, core network control node obtains end-to-end path quality and the core-network side path quality of current sessions;
Described core network control node according to the end-to-end path quality of accessed current sessions, with core-network side path quality, determine the deterioration reason in current sessions path;
According to the deterioration reason in the current sessions path determined, described core network control node refuses described path handover request, or is current sessions re-constructing media transmission path.
2. path switching method according to claim 1, is characterized in that, the network element of described initiation path handover request is specially: the terminal equipment on current sessions path or media gateway or media relays equipment.
3. path switching method according to claim 1, is characterized in that, described core network control node obtains the end-to-end path quality in current sessions path, is specially:
Described network element obtains the end-to-end path quality of current sessions, and is carried to described core network control node by described path handover request;
Or described core network control node is initiatively to the end-to-end path quality of the terminal equipment inquiry current sessions of current sessions.
4. path switching method according to claim 1, is characterized in that, described core network control node obtains the core-network side path quality of current sessions, is specially:
Core network control node is by the path quality to core-network side on agent node management server queries current sessions path.
5. path switching method according to claim 1, is characterized in that, described core network control node according to the end-to-end path quality of accessed current sessions, with core-network side path quality, determine the deterioration reason in current sessions path, be specially:
The end-to-end path quality of accessed current sessions and core-network side path quality compare by described core network control node, if both differences meet default path quality threshold requirement, then determine that the deterioration in current sessions path is caused by core-network side path; If both differences do not meet default path quality threshold requirement, then determine that the deterioration in current sessions path is caused by Access Network side path.
6. path switching method according to claim 5, is characterized in that, according to the deterioration reason in the current sessions path determined, described core network control node refuses described path handover request, or is current sessions re-constructing media transmission path, specifically comprises:
When determining that the deterioration in current sessions path is caused by core-network side path, described core network control node is current sessions gravity treatment media device, and notify that the terminal equipment on current sessions is switched on the media device of gravity treatment, be current sessions re-constructing media transmission path;
When determining that the deterioration in current sessions path is caused by Access Network side path, described core network control node sends refuse information to the network element of described initiation path handover request, refuses described path handover request; Or described core network control node is current sessions gravity treatment access network node, and notifying that the terminal equipment on current sessions path is switched on gravity treatment access network node, is current sessions re-constructing media transmission path.
7. path switching method according to claim 6, is characterized in that, when determining that the deterioration in current sessions path is caused by Access Network side path, described core network control node refuses described path handover request, specifically comprises:
In a case where, core network control node sends refuse information to the network element of described initiation path handover request, refuses described path handover request:
Core network control node fails the Access Network information of two terminal equipments on the current sessions that gets; Or core network control node is according to the Access Network information of two terminal equipments on the current sessions got, and on energy perception current sessions path, two terminal equipments all do not have other available access networks nodes; Or, other available access networks nodes of two terminal equipments on the current sessions path perceived, all not allow by the switchover policy that configured.
8. path switching method according to claim 6, it is characterized in that, when determining that the deterioration in current sessions path is caused by Access Network side path, described core network control node is current sessions gravity treatment access network node, and notify that the terminal equipment on current sessions path is switched on gravity treatment access network node, for current sessions re-constructing media transmission path, specifically comprise:
Described core network control node can get the Access Network information of two terminal equipments on current sessions path, and according to accessed Access Network information, the access network node when any one terminal equipment or two terminal equipments have other available on session path can be felt, then in other available access networks nodes of institute's perception, for one or two access network node of current sessions gravity treatment, and notify that the terminal equipment on current sessions is switched on the access network node of gravity treatment, be current sessions re-constructing media transmission path.
9. a path switching device, is characterized in that, described device comprises: acquiring unit, determining unit and motor unit, wherein,
Acquiring unit, for after the path handover request receiving the initiation of the network element in current sessions, obtains end-to-end path quality and the core-network side path quality of current sessions;
Determining unit, for the current sessions that gets according to described acquiring unit end-to-end path quality, with core-network side path quality, determine the deterioration reason in current sessions path;
Motor unit, for the deterioration reason in current sessions path determined according to described determining unit, refuses described path handover request, or is current sessions re-constructing media transmission path.
10. path switching device according to claim 9, is characterized in that, described acquiring unit comprises the first acquisition module and the second acquisition module, wherein,
First acquisition module, for obtaining the end-to-end path quality of current sessions, or by inquiring about the end-to-end path quality of current sessions to the terminal equipment of current sessions by the network element of described initiation path handover request;
Second acquisition module, for passing through the path quality to core-network side on agent node management server queries current sessions path.
11. path switching devices according to claim 9, is characterized in that, described determining unit, specifically for,
End-to-end path quality and the core-network side path quality of the current sessions got by described acquiring unit compare, if both differences meet default path quality threshold requirement, then determine that the deterioration in current sessions path is caused by core-network side path; If both differences do not meet default path quality threshold requirement, then determine that the deterioration in current sessions path is caused by Access Network side path; And determined current sessions path deterioration reason is sent to described motor unit.
12. path switching devices according to claim 11, is characterized in that, described motor unit, specifically for,
Receive the current sessions path deterioration reason that described determining unit sends;
When the current sessions path deterioration reason received is core-network side path, being current sessions gravity treatment media device, and notifying that the terminal equipment on current sessions is switched on the media device of gravity treatment, is current sessions re-constructing media transmission path;
When the current sessions path deterioration reason received is Access Network side path, the network element to described initiation path handover request sends refuse information, refuses described path handover request; Or being current sessions gravity treatment access network node, and notifying that the terminal equipment on current sessions path is switched on gravity treatment access network node, is current sessions re-constructing media transmission path.
13. 1 kinds of path switching systems, is characterized in that, described system comprises: terminal equipment, access network node, core network control node and media device, and wherein, core network control node comprises: acquiring unit, determining unit and motor unit, wherein,
Acquiring unit, for after the path handover request receiving the initiation of the network element in current sessions, obtains end-to-end path quality and the core-network side path quality of current sessions;
Determining unit, for the current sessions that gets according to described acquiring unit end-to-end path quality, with core-network side path quality, determine the deterioration reason in current sessions path;
Motor unit, for the deterioration reason in current sessions path determined according to described determining unit, refuses described path handover request, or is current sessions re-constructing media transmission path.
14. path switching systems according to claim 13, it is characterized in that, described system also comprises: agent node management server, and the acquiring unit of described core network control node is by obtaining the path quality of core-network side on current sessions path to this agent node management server queries.
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| CN201010541485.7A CN102469082B (en) | 2010-11-11 | 2010-11-11 | A kind of path switching method and device, system |
| PCT/CN2011/081263 WO2012062164A1 (en) | 2010-11-11 | 2011-10-25 | Method, device and system for path switching |
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| WO2014071600A1 (en) * | 2012-11-09 | 2014-05-15 | 富士通株式会社 | Method for switching device-to-device communication, base station, and communication system |
| CN104244294B (en) * | 2013-06-07 | 2018-03-16 | 电信科学技术研究院 | A kind of direct communication path reverse method and equipment |
| CN103796229B (en) * | 2013-09-16 | 2017-09-12 | 中兴通讯股份有限公司 | A kind of session chainlink control method and device |
| CN106817740B (en) * | 2015-11-27 | 2019-04-23 | 华为技术有限公司 | The method, apparatus and system of media path selection |
| CN106231640B (en) * | 2016-07-29 | 2019-12-13 | 北京小米移动软件有限公司 | Wireless access point switching method and device |
| US10728952B2 (en) | 2017-01-09 | 2020-07-28 | Huawei Technologies Co., Ltd. | System and methods for session management |
| JP2021501482A (en) * | 2017-09-30 | 2021-01-14 | オッポ広東移動通信有限公司Ｇｕａｎｇｄｏｎｇ Ｏｐｐｏ Ｍｏｂｉｌｅ Ｔｅｌｅｃｏｍｍｕｎｉｃａｔｉｏｎｓ Ｃｏｒｐ．， Ｌｔｄ． | Service route switching methods, devices, storage media and systems |
| CN110086748B (en) * | 2018-01-25 | 2022-06-17 | 中兴通讯股份有限公司 | Fusion equipment media control method and device and communication terminal |
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