CN101600193B - Stream switching method, system and network device - Google Patents

Stream switching method, system and network device Download PDF

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Publication number
CN101600193B
CN101600193B CN2009100874264A CN200910087426A CN101600193B CN 101600193 B CN101600193 B CN 101600193B CN 2009100874264 A CN2009100874264 A CN 2009100874264A CN 200910087426 A CN200910087426 A CN 200910087426A CN 101600193 B CN101600193 B CN 101600193B
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information
anchor point
mobile
stream
access gateway
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CN101600193A (en
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时晓岩
谭仕勇
申砾
张瀚文
张玉军
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Abstract

A stream switching method, a system and a network device are disclosed. The stream switching method comprises the following steps: a switching decision maker receives information of streams to be switched sent by a switching initiator through a target mobile access gateway, judges whether switching is permitted or not, and returns judgement result information to the target mobile access gateway, and an area mobile anchor which provides services for the information of streams to be switched updates the routing information of the streams to be switched under the condition that the judgement result is permission of the switching. The technical proposal can realize the switching with stream as unit and enriches the realization methods of the stream switching, thus being capable of satisfying the requirements of streams such as QoS.

Description

Stream switching method, system and the network equipment
Technical field
The present invention relates to the proxy mobile IPv 6 technical field, be specifically related to a kind of stream handoff technique.
Background technology
PMIPv6 (Proxy Mobilie IPv6, proxy mobile IPv 6) system comprises: LMA (LocalizedMobility Anchor, the zone mobile anchor point) and MAG (Mobility Access Gateway, Mobile Access Gateway), and in a PMIPv6 territory comprise at least one LMA and a plurality of MAG.Because MAG can be used as the agency of mobile node and registers to LMA, therefore, the PMIPv6 agreement can realize need not the IP mobile management that mobile node participates in.
LMA is after receiving the registration message (PBU) that carries mobile node sign and MAG address information of MAG transmission, for mobile node distributes one or more home network prefix (MN-HNP), and informing MAG by registration confirmation message (PBA), MAG informs mobile node by router advertisement with MN-HNP.Mobile node disposes its home address (MN-HoA) according to MN-HNP, and mobile node can use this MN-HoA by any access link in the PMIPv6 territory.
When mobile node inserted the PMIPv6 territory simultaneously by a plurality of interfaces, LMA can safeguard a BCE (Binding Cache Entry, banding cache list item) for each interface of mobile node, to write down the routing iinformation of this interface.The all corresponding home network prefix of each interface of mobile node.LAM and MAG all determine corresponding interface according to the destination address/raw address of packet head, and send data packets for transmission between mobile node and the communication node (CN) by this interface.
In realizing process of the present invention, the inventor finds: existing P MIPv6 system only provides the switching based on interface, and soon all streams in the interface of mobile node all switch in another interface of this mobile node as IP stream.The stream switching mode is single, can not satisfy the QoS demands such as (service quality) of stream.
Summary of the invention
Embodiment of the present invention provides a kind of stream switching method and system, can realize with stream being the switching of unit, promptly can switch at certain stream in the interface, has enriched the implementation that stream switches, and can satisfy the demands such as QoS of stream.
The stream switching method that the embodiment of the invention provides comprises:
Handover decisions side receives switches the to be switched stream information that the initiator sends by the purpose Mobile Access Gateway;
Described handover decisions side judges whether to allow to switch, and return judged result information to described purpose Mobile Access Gateway, and under the situation that judged result is switched for permission, provide the regional mobile anchor point of service to upgrade the routing iinformation of the described change of current to be cut for described to be switched stream information.
The stream switched system that the embodiment of the invention provides comprises:
The purpose Mobile Access Gateway is used to receive and switches first request that carries to be switched stream information that the initiator sends, and sends the message that carries described to be switched stream information to handover decisions side;
Handover decisions side, be used to receive described to be switched stream information, judge whether to allow to switch, and return judged result information to described purpose Mobile Access Gateway, and when judged result is switched for permission, provide the regional mobile anchor point of service to upgrade the routing iinformation of the described change of current to be cut for described to be switched stream information;
Described purpose Mobile Access Gateway sends first request response according to the judged result information that receives to described switching initiator.
The switching device shifter that the embodiment of the invention provides, for switching the initiator, described switching initiator comprises:
Switch the stream information module, be used for according to current network state information, traffic flow information and user preference information any one or a plurality ofly determine to be switched stream information;
First sending module is used for sending first request that carries described to be switched stream information to the purpose Mobile Access Gateway;
First receiver module is used to receive first request response that the purpose Mobile Access Gateway returns.
The network equipment that the embodiment of the invention provides is regional mobile anchor point, comprising:
Second receiver module is used to receive to be switched stream information;
Switch decision module is used to judge whether to allow the described change of current to be cut to switch;
The secondary route update module is used for upgrading the routing iinformation of the described change of current to be cut when the judged result of switch decision module is switched for permission;
Second sending module is used for returning to the purpose Mobile Access Gateway judged result information of switch decision module.
The network equipment that the embodiment of the invention provides is the purpose Mobile Access Gateway, comprising:
The 3rd receiver module is used to receive and switches first request that carries to be switched stream information that the initiator sends, and the judged result information switched of whether allowing of receiving that handover decisions side returns;
Enquiry module is used for the regional mobile anchor point in the described change of current correspondence to be cut of configuration information inquiry of described purpose Mobile Access Gateway stored configuration information and/or memory device, stores;
The 3rd sending module is used for sending the message that carries described to be switched stream information to the regional mobile anchor point that described enquiry module inquires, and the judged result information that receives according to the 3rd receiver module sends first request response to switching the initiator.
Description by technique scheme as can be known, by obtaining to be switched stream information by switching the initiator, and send to be switched stream information to the purpose Mobile Access Gateway, send to be switched stream information by the purpose Mobile Access Gateway to handover decisions side, make handover decisions can be enough whether allow the judgement of switching at stream, when allowing to switch, by making more new routing information of regional mobile anchor point, and make the purpose Mobile Access Gateway and switch the initiator and know whether allow the judged result information switched, the change of current to be cut can be transmitted by the route after switching, thereby finished switching at certain stream, enrich the implementation that stream switches, and satisfied the QoS demand of stream.
Description of drawings
Fig. 1 is the stream switching method flow chart of the embodiment of the invention one;
Fig. 2 is the stream switching method flow chart of the embodiment of the invention two;
Fig. 3 is the stream switching method flow chart of the embodiment of the invention three;
Fig. 4 is the stream switching method flow chart of the embodiment of the invention four;
Fig. 5 is the stream switching method flow chart of the embodiment of the invention five;
Fig. 6 is the stream switching method flow chart of the embodiment of the invention six;
Fig. 7 is the stream switching method flow chart of the embodiment of the invention seven;
Fig. 8 is the stream switching method flow chart of the embodiment of the invention eight;
Fig. 9 A is the stream switched system schematic diagram of the embodiment of the invention nine;
Fig. 9 B is the switching initiator's 900 of the embodiment of the invention nine a structural representation;
Fig. 9 C is the structural representation of the handover decisions side 920 of the embodiment of the invention nine;
Fig. 9 D is the structural representation of the purpose Mobile Access Gateway 910 of the embodiment of the invention nine.
Embodiment
Embodiment one, stream switching method.The flow process of this method as shown in Figure 1.
Among Fig. 1, S100, switching initiator obtain to be switched stream information, and send first request to the purpose Mobile Access Gateway, carry the above-mentioned to be switched stream information that obtains in this first request.
Switching initiator among the S100 can according in current network state information, traffic flow information and the user preference information any one or two or three determine to be switched stream information arbitrarily, thereby obtain to be switched stream information.Certainly, switch the initiator and also can adopt other modes to obtain to be switched stream information, for example, switch the initiator and determine to be switched stream information according to other factors; Again for example, switch the initiator and from the order that receives, obtain to be switched stream information or the like.Embodiment one does not limit the specific implementation process that the initiator obtains to be switched stream information of switching.
Above-mentioned current network state information also can be called the network information, current network state information such as access network type, network availability bandwidth and network congestion degree etc.; The bandwidth requirement of above-mentioned traffic flow information such as data stream type, data flow etc.; The access technology of above-mentioned user preference information such as user preference etc.
The to be switched stream information that carries in first request can be the stream description information of to be switched stream, also can be the traffic identifier of to be switched stream.Stream description information here such as IP five-tuple information etc.
Switching initiator among the S100 can be mobile node, also can be network side node.Network side node is as providing the regional mobile anchor point of service for the current change of current to be cut.For providing the regional mobile anchor point of service, the current change of current to be cut also can be called: the regional mobile anchor point that service is provided for the former interface of the change of current to be cut.
When switching the initiator when be mobile node, first any one or a plurality of information that can also carry in asking in the tunnel encapsulation mode of switching type, switch reasons and expectation that mobile node sends.Certainly mobile node also can be carried at the information such as tunnel encapsulation mode of switching type, switch reasons and expectation and remove in first other message asking, and sends to the purpose Mobile Access Gateway.
Above-mentioned switching type represents that it still is that the partial discharge of the change of current to be cut needs to switch that whole flows of the change of current to be cut all need to switch.All flows all need to switch be the change of current to be cut after switching, all transmit by the path between the interface of mobile node and purpose Mobile Access Gateway.It is that the change of current to be cut is after switching that partial discharge need switch, only some flow can transmit by the path between the interface of mobile node and purpose Mobile Access Gateway, and another part flow of the change of current to be cut still can transmit by the original route before switching.Switching type can be used for handover decisions side and whether allow the judging process that switches, and promptly switching type can be used as the judgement factor switching of whether allowing.In addition, switching type can also make handover decisions side know that the switching initiator wishes the stream switching mode of carrying out.
Above-mentioned switch reasons represents to cause the reason of switching, as the switching of carrying out owing to user preference or network congestion etc.Switch reasons can be used for handover decisions side and whether allow the judging process that switches, and promptly switch reasons can be used as the judgement factor switching of whether allowing.
The tunnel encapsulation mode of above-mentioned expectation represents that mobile node wishes after switching the packaged type that stream adopted between mobile node and the purpose Mobile Access Gateway after the transmission switching.
When the switching initiator was mobile node, above-mentioned first request can be the stream handoff request; When the switching initiator was regional mobile anchor point, above-mentioned first request can be the request of stream Binding Update.
S110, purpose Mobile Access Gateway receive and switch first request that the initiator sends, and the purpose Mobile Access Gateway sends the message that carries above-mentioned to be switched stream information to handover decisions side.The message that carries to be switched stream information that the purpose Mobile Access Gateway sends can be called second request.Can also carry information such as switching type and/or switch reasons in second request.
When the switching initiator was mobile node, the handover decisions side here was regional mobile anchor point.When the switching initiator was regional mobile anchor point, the handover decisions side here was a mobile node.
In handover decisions side is under the situation of regional mobile anchor point, when the purpose Mobile Access Gateway sends second request, should inquire about the regional mobile anchor point information of change of current correspondence to be cut earlier, the address information of regional mobile anchor point information such as regional mobile anchor point etc.The purpose Mobile Access Gateway can only be searched the regional mobile anchor point information of change of current correspondence to be cut in its stored configuration information.The purpose Mobile Access Gateway also can only be searched the regional mobile anchor point information of change of current correspondence to be cut in the configuration information of memory device, stores, promptly the purpose Mobile Access Gateway directly sends query requests to memory device after receiving first request.In addition, the purpose Mobile Access Gateway can also be searched earlier the regional mobile anchor point information of change of current correspondence to be cut in its stored configuration information, when the regional mobile anchor point information of searching less than coupling, send query requests to memory device again, in the configuration information of memory device, stores, to search the regional mobile anchor point information of change of current correspondence to be cut.
Above-mentioned memory device is the network equipment that independently is provided with the purpose Mobile Access Gateway, can be for having the network equipment of DNS (Domain Name Server, name server) function as memory device; Memory device is for having the network equipment of AAA (Authentication, Authorization, Accounting, authentication, mandate, charging) function for another example; Also have, memory device can be for having the network equipment of DHCP (Dynamic HostConfiguration Protocol, DHCP) server capability.Memory device also can be other network equipments, and present embodiment does not limit the concrete manifestation form of memory device.
The purpose Mobile Access Gateway can be searched in above-mentioned configuration information according to information such as the source IP address information of the change of current to be cut and/or purpose IP address informations, to obtain corresponding regional mobile anchor point information.The purpose Mobile Access Gateway also can be searched according to other information, and as searching according to former interface message of change of current correspondence to be cut etc., embodiment one does not limit the specific implementation process that the purpose Mobile Access Gateway obtains regional mobile anchor point information.
Need to prove that the regional mobile anchor point of above-mentioned change of current correspondence to be cut can comprise: as the regional mobile anchor point of handover decisions side, and/or, not as the regional mobile anchor point of handover decisions side; That is to say, the regional mobile anchor point information that purpose Mobile Access Gateway inquiry obtains comprises: as the regional mobile anchor point information of handover decisions side, and/or the regional mobile anchor point information in the PMIPv6 territory not as handover decisions side and under the purpose Mobile Access Gateway.If the regional mobile anchor point of change of current correspondence to be cut comprises not the regional mobile anchor point as handover decisions side, represent that then the purpose Mobile Access Gateway can not be directly carries out information interaction with regional mobile anchor point as handover decisions side, at this moment, the effect as the regional mobile anchor point of handover decisions side does not comprise: after receiving to be switched stream information, continue to send to be switched stream information to the regional mobile anchor point as handover decisions side.Obtained regional mobile anchor point information at the purpose Mobile Access Gateway as handover decisions side, but, the purpose Mobile Access Gateway can not carry out under the situation of information interaction with this zone mobile anchor point, if the purpose Mobile Access Gateway has obtained the regional mobile anchor point information in its affiliated PMIPv6 territory, then Mobile Access Gateway directly the regional mobile anchor point in the PMIPv6 territory under it send to be switched stream information, perhaps send to be switched stream information and the regional mobile anchor point information of searching acquisition, send to be switched stream information to regional mobile anchor point as handover decisions side by the regional mobile anchor point that receives to be switched stream information; If the purpose Mobile Access Gateway does not also obtain the regional mobile anchor point information in its affiliated PMIPv6 territory, then the purpose Mobile Access Gateway can be searched once more, to obtain the regional mobile anchor point information in the PMIPv6 territory under it, then, carry out the process of regional mobile anchor point transmission information in PMIPv6 territory under it again.After not receiving the message that carries to be switched stream information as the regional mobile anchor point of handover decisions side, can from message, obtain regional mobile anchor point information as handover decisions side, also can be by the regional mobile anchor point information of addressing system acquisition as handover decisions side, then, send to be switched stream information.
Different according to the concrete condition of the regional mobile anchor point that is provided with in PMIPv6 territory under purpose Mobile Access Gateway and the regional mobile anchor point and the PMIPv6 territory, purpose Mobile Access Gateway send the specific implementation process of second request also can be different.Simply exemplify the specific implementation process that several purpose Mobile Access Gateways send second request below.
Example 1, purpose Mobile Access Gateway belong to same PMIPv6 territory with regional mobile anchor point as handover decisions side, and only be provided with a regional mobile anchor point in this PMIPv6 territory, promptly the regional mobile anchor point in the PMIPv6 territory under the purpose Mobile Access Gateway is exactly handover decisions side.In this case, the purpose Mobile Access Gateway is after first request that receives the mobile node transmission and searching in the configuration information of its stored configuration information and/or memory device, stores, and direct regional mobile anchor point in PMIPv6 territory, its place sends second request that carries to be switched stream information and gets final product.Can preset the address information that is equipped with the regional mobile anchor point in the PMIPv6 territory, its place in the purpose Mobile Access Gateway.In these cases, configuration information in the purpose Mobile Access Gateway can include only regional mobile anchor point information, the purpose Mobile Access Gateway can be not be searched according to information such as the source IP address information of the change of current to be cut and/or purpose IP address informations, gets final product but directly obtain regional mobile anchor point information.In addition, if the purpose Mobile Access Gateway need be to memory device query region mobile anchor point information, then Mobile Access Gateway should utilize corresponding information to search according to the situation that is provided with of corresponding relation in the memory device to get final product.
Example 2, purpose Mobile Access Gateway belong to same PMIPv6 territory with regional mobile anchor point as handover decisions side, and are provided with a plurality of regional mobile anchor points in this PMIPv6 territory.In this case, the purpose Mobile Access Gateway can obtain to provide for the former interface of change of current correspondence to be cut the network address of the regional mobile anchor point of service by addressing system, then, send second request that carries to be switched stream information according to the network address that obtains again.The purpose Mobile Access Gateway can be by inquiring about to the network equipment with DNS function, to obtain the network address of regional mobile anchor point, the purpose Mobile Access Gateway also can be by inquiring about to the network equipment with aaa functionality or dhcp server functionality, to obtain the network address of regional mobile anchor point.The purpose Mobile Access Gateway can utilize the one or more information in network prefix information of to be switched stream information, the former interface message of the change of current to be cut and former interface correspondence etc. to carry out the network address inquiry of regional mobile anchor point.
Example 3, purpose Mobile Access Gateway belong to different PMIPv6 territories with regional mobile anchor point as handover decisions side.In this case, the purpose Mobile Access Gateway may not carry out information interaction with the regional mobile anchor point in other PMIPv6 territories, at this moment, the purpose Mobile Access Gateway can by the regional mobile anchor point in the PMIPv6 territory, its place with carry out information interaction as the regional mobile anchor point of handover decisions side.That is to say, the regional mobile anchor point of purpose Mobile Access Gateway in PMIPv6 territory, its place sends second request that carries to be switched stream information, sends the to be switched stream information that carries in second request by the regional mobile anchor point (being expressed as the first area mobile anchor point temporarily) that receives second request to the regional mobile anchor point (being expressed as the second area mobile anchor point temporarily) as handover decisions side.The first area mobile anchor point is when the transmission of second area mobile anchor point carries the message of to be switched stream information, can also carry the tunnel encapsulation mode information of expectation in this message, the tunnel encapsulation mode of the expectation here is tunnel encapsulation mode first area mobile anchor point expectation, that adopted when transmitting between first area mobile anchor point and second area mobile anchor point after the change of current to be cut is switched.The first area mobile anchor point can also can be other request messages for second request to the message that carries to be switched stream information that the second area mobile anchor point sends.
Need to prove that in above-mentioned three examples, the regional mobile anchor point that receives second request can be by judging whether that can intercept and capture the change of current to be cut determines whether and need send the to be switched stream information that carries in second request to other regional mobile anchor points.And judging at regional mobile anchor point need be when other regional mobile anchor points sends to be switched stream information, and this zone mobile anchor point can obtain other regional mobile anchor point information from the configuration information of its configuration information and/or memory device, stores, and sends.Embodiment one not restricted area mobile anchor point obtains the specific implementation process of other regional mobile anchor point information.In addition, the first area mobile anchor point can also carry switching type and/or switch reasons etc. in the message that carries to be switched stream information that the second area mobile anchor point sends.
When handover decisions side was mobile node, above-mentioned second request can be the stream handoff request; When handover decisions side was regional mobile anchor point, above-mentioned second request can be the request of stream Binding Update.In addition, under the situation of example 3, the first area mobile anchor point can directly be transmitted second request to the second area mobile anchor point, also can in second request, increase first area mobile anchor point expectation, with the second area mobile anchor point between tunnel encapsulation mode information after, send second to the second area mobile anchor point and ask.The first area mobile anchor point can also obtain to be switched stream information from second request, and with to be switched stream information or with to be switched stream information and its expectation and the second area mobile anchor point between tunnel encapsulation mode information be carried in other message, then, send this other message to the second area mobile anchor point.These other message also can be called second request.Embodiment one does not limit the first area mobile anchor point sends specific implementation process to be switched stream information to the second area mobile anchor point.
After S120, handover decisions side received the to be switched stream information of purpose Mobile Access Gateway transmission, handover decisions side judged whether to allow the switching of the change of current to be cut, if allow the switching of the change of current to be cut, then arrives S130, otherwise, to S140.
Handover decisions side can adopt the local switchover policy that sets in advance among the S120 when judging whether to allow to switch.Handover decisions side's difference, local switchover policy can be identical, also can be different.
When handover decisions side is regional mobile anchor point, the zone mobile anchor point can according in current network state information, traffic flow information, user contracting data, switch reasons and the switching type any one or a plurality of, and the local switchover policy of calmodulin binding domain CaM mobile anchor point judges whether allow to switch.
When handover decisions side is mobile node, mobile node can according in current network state information, traffic flow information, user preference information, switch reasons and the switching type any one or a plurality of, and judge whether to allow to switch in conjunction with the local switchover policy of mobile node.
Above-mentioned user contracting data can be provided with flexibly according to the network needs, switches as not allowing to switch or do not allow to carry out partial discharge.Above-mentioned local switchover policy also can be provided with flexibly according to the network needs, as when switch reasons is certain predetermined value and network congestion, does not allow to switch or the like.
S130, handover decisions direction purpose Mobile Access Gateway return the judged result information that allows switching, as return second request response that carries the permission handover information; And, under the situation that allows the change of current to be cut to switch,, the change of current to be cut should upgrade the routing iinformation of the change of current to be cut for providing the regional mobile anchor point of service.To S150.Here the regional mobile anchor point of carrying out the routing iinformation that upgrades the change of current to be cut is meant: the current regional mobile anchor point that service is provided for the change of current to be cut.In addition, for providing the regional mobile anchor point of service, the stream after switching at the stream after switching routing iinformation to be set.
S140, handover decisions direction purpose Mobile Access Gateway return the judged result information switched of not allowing, as return and carry second request response that does not allow handover information.To S150.
Need to prove, if handover decisions side is regional mobile anchor point, and have above-mentioned second area mobile anchor point, then the judged result transmission of Information path among S130 and the S140 should for the second area mobile anchor point-＞the first area mobile anchor point-＞the purpose Mobile Access Gateway.And the second area mobile anchor point can also return at the tunnel encapsulation mode information between regional mobile anchor point to the first area mobile anchor point simultaneously.
Need to prove that in addition if handover decisions side is a mobile node, then mobile node can also return at the tunnel encapsulation mode information between mobile node and the purpose Mobile Access Gateway to the purpose Mobile Access Gateway simultaneously.
S150, purpose Mobile Access Gateway send first request response according to the judged result information that receives to switching the initiator.Carry in first request response and whether allow handover information.If the switching initiator is a mobile node, then the purpose Mobile Access Gateway can also return at the tunnel encapsulation mode information between mobile node and the purpose Mobile Access Gateway to mobile node simultaneously.
The foregoing description one can mobile node or regional mobile anchor point initiate that stream switches and the situation not interrupting being connected between mobile node and the CN under, with the change of current to be cut from being connected between the purpose interface that being connected between the former interface of mobile node and the CN switches to mobile node and the CN.By the judgement whether allowing of utilizing that handover decisions side carries out switched, can satisfy the QoS demand of stream and network management requirement etc.In addition, embodiment one can finish the negotiations process of the tunnel encapsulation mode in each section path in the stream handoff procedure.
Embodiment two, be mobile node switching the initiator, handover decisions side is the stream switching method under the regional mobile anchor point situation.This method can be implemented under the situation of not interrupting being connected between mobile node and the CN, with the change of current to be cut from being connected between the purpose interface that being connected between the former interface of mobile node and the CN switches to mobile node and the CN.The former interface here can be called interface 1, and the purpose interface can be called interface 2, and interface 1 belongs to the former Mobile Access Gateway of mobile node, and interface 2 belongs to the purpose Mobile Access Gateway of mobile node.The method flow of embodiment two as shown in Figure 2.
Among Fig. 2, mobile node passes through former interface attached on the former Mobile Access Gateway, and passes through the purpose interface attached on the purpose Mobile Access Gateway.Before data flow (being the change of current to be cut) was switched, data flow was transmitted between the former interface of mobile node and regional mobile anchor point by former Mobile Access Gateway.
S200, mobile node obtain to be switched stream information.Concrete, mobile node can be according to be switched stream informations of making a strategic decision out such as current network state information, traffic flow information and user preference information.The to be switched stream information here can wait by stream description information or traffic identifier to be represented.Stream description information such as IP five-tuple etc.
S210, mobile node send stream handoff request (i.e. first request) to the purpose Mobile Access Gateway, carry to be switched stream information in the stream handoff request.
The purpose Mobile Access Gateway here is meant: the Mobile Access Gateway of the way of escape by process switched in the change of current to be cut, for example, mobile node need switch to Mobile Access Gateway 2 from Mobile Access Gateway 1 with data flow 1 and realize route, then Mobile Access Gateway 2 is the purpose Mobile Access Gateway, and Mobile Access Gateway 1 is former Mobile Access Gateway.
Stream handoff request among the S210 can also carry the tunnel encapsulation mode information of switching type, switch reasons, expectation etc.Switching type is meant: after finishing the stream switching, mobile node is is only received and dispatched the packet of the change of current to be cut by the purpose interface, and perhaps, after finishing the stream switching, mobile node is received and dispatched the packet of the change of current to be cut by former interface and purpose interface simultaneously.The tunnel encapsulation mode of expectation is meant between mobile node and the purpose Mobile Access Gateway tunnel encapsulation mode that data flow adopted after transmission is switched, and the tunnel encapsulation mode can encapsulate for GRE, also can encapsulate etc. for IPinIP.Present embodiment does not limit the concrete manifestation form of tunnel encapsulation mode.
S220, purpose Mobile Access Gateway send stream Binding Update request (i.e. second request) to regional mobile anchor point after receiving the stream handoff request, carry to be switched stream information in this stream Binding Update request.
The purpose Mobile Access Gateway can carry out the addressing process of regional mobile anchor point earlier, to obtain the address information of regional mobile anchor point send the request of stream Binding Update to regional mobile anchor point before.The addressing process of zone mobile anchor point can be for: purpose Mobile Access Gateway according to the network prefix information of the former interface message of mobile node or former interface correspondence or to be switched stream information etc. to network entity inquiry, to obtain the network address information of regional mobile anchor point with DNS or AAA or dhcp server functionality.
S230, as the regional mobile anchor point of handover decisions side after obtaining to be switched stream information, judge whether to allow to switch, after determining to allow to switch, regional mobile anchor point upgrades the routing iinformation at the change of current to be cut of local storage.
Concrete, the zone mobile anchor point can judge whether after obtaining to be switched stream information because network topology etc. are former thereby can't intercept and capture the change of current to be cut, determining to intercept and capture the change of current to be cut the time, send to be switched stream information to the regional mobile anchor point that can intercept and capture the change of current to be cut; Determining can intercept and capture the change of current to be cut the time, whether regional mobile anchor point allows the judgement of switching.Regional mobile anchor point among Fig. 2 can be intercepted and captured the change of current to be cut, is handover decisions side.
The zone mobile anchor point can be according to factors such as user contracting data, switch reasons, current network conditions and switching types, and judges whether to accept this stream Binding Update request in conjunction with local switchover policy, promptly whether allows switching; If accept the request of stream Binding Update, then upgrade the routing iinformation at the change of current to be cut of local storage; Otherwise, route information is not upgraded operation.
Above-mentioned routing iinformation at the change of current to be cut is meant: the corresponding relation of to be switched data flow and routed path information.To be switched data flow in this corresponding relation can be represented by IP five-tuple or traffic identifier.Routed path information in this corresponding relation can be any in the Tunnel Identifier between the address of Mobile Access Gateway or Mobile Access Gateway sign or Mobile Access Gateway and the regional mobile anchor point etc. or a plurality of.
S240, regional mobile anchor point send the stream Binding Update to the purpose Mobile Access Gateway and reply (i.e. second request response).The zone mobile anchor point indicates stream switching result information (being the switching judging object information) by sending stream Binding Update response message to the purpose Mobile Access Gateway.The stream switching result here is meant that the stream binding update messages is accepted or refuses or part is accepted etc.
S250, purpose Mobile Access Gateway are replied to mobile node according to the stream Binding Update that receives and are sent stream handover acknowledge message (i.e. first request response), to indicate stream switching result information.
Can also carry information such as tunnel encapsulation mode in the stream handover acknowledge message among the S250.The tunnel encapsulation mode indicates after switching, the purpose Mobile Access Gateway encapsulates the data flow after switching according to this tunnel encapsulation mode, and the packet after mobile node sends encapsulation, mobile node also should encapsulate the data flow after switching according to this tunnel encapsulation mode, and the packet after the purpose Mobile Access Gateway sends encapsulation.
After finishing the above-mentioned information interaction of present embodiment, change of current switching to be cut is finished.Stream after the switching (can be all flows of the change of current to be cut, also can be the partial discharge of the change of current to be cut) can transmit between mobile node shown in Figure 2, purpose Mobile Access Gateway and regional mobile anchor point.
Need to prove in addition, the foregoing description two switches to example and is described attached to carrying out stream after on the purpose Mobile Access Gateway by the purpose interface with mobile node, embodiment two also can be transformed to purpose interface at mobile node and flow switching in attached to purpose Mobile Access Gateway process, specific implementation process after the conversion and the description of the foregoing description two basic identical (message name can be different) no longer describe in detail at this.
The foregoing description two can mobile node initiate that stream switches and the situation not interrupting being connected between mobile node and the CN under, with the change of current to be cut from being connected between the purpose interface that being connected between the former interface of mobile node and the CN switches to mobile node and the CN.By the judgement whether allowing of utilizing that regional mobile anchor point carries out switched, can satisfy the QoS needs of stream and network management requirement etc.In addition, embodiment two can finish the negotiations process of tunnel encapsulation mode in the stream handoff procedure.
Embodiment three, be regional mobile anchor point switching the initiator, handover decisions side is the stream switching method under the mobile node situation.This method can be implemented under the situation of not interrupting being connected between mobile node and the CN, with the change of current to be cut from being connected between the purpose interface that being connected between the former interface of mobile node and the CN switches to mobile node and the CN.The former interface here can be called interface 1, and the purpose interface can be called interface 2, and interface 1 belongs to the former Mobile Access Gateway of mobile node, and interface 2 belongs to the purpose Mobile Access Gateway of mobile node.The method flow of embodiment three as shown in Figure 3.
Among Fig. 3, mobile node passes through former interface attached on the former Mobile Access Gateway, and pass through the purpose interface attached on the purpose Mobile Access Gateway, before data flow (being the change of current to be cut) was switched, data flow was transmitted between the former interface of mobile node and regional mobile anchor point by former Mobile Access Gateway.
S300, regional mobile anchor point obtain to be switched stream information.Concrete, regional mobile anchor point can be according to be switched stream informations of making a strategic decision out such as current network state information, traffic flow information and user preference information.The to be switched stream information here can wait by stream description information or traffic identifier to be represented.Stream description information such as IP five-tuple etc.
S310, regional mobile anchor point send stream Binding Update request (i.e. first request) to the purpose Mobile Access Gateway, carry to be switched stream information in the request of stream Binding Update.This stream Binding Update request can also be carried information such as switching type and switch reasons.
After S320, purpose Mobile Access Gateway receive the request of stream Binding Update, send stream handoff request (i.e. second request), carry to be switched stream information in the stream handoff request to mobile node.Can also carry arbitrary or a plurality of in the tunnel encapsulation mode of switching type, switch reasons and expectation in this stream handoff request.The tunnel encapsulation mode of the expectation here is the tunnel encapsulation mode between itself and the mobile node of purpose Mobile Access Gateway expectation.
S330, mobile node are after receiving the stream handoff request, judge whether to receive this stream handoff request, be that mobile node judges whether to allow to switch, then, mobile node sends stream handover acknowledge message (i.e. second request response) to the purpose Mobile Access Gateway, indicates stream switching result information (being the switching judging object information) by this stream handover acknowledge message to the purpose Mobile Access Gateway.
Concrete, mobile node can be after receiving the stream handoff request, according to factors such as user preference information, switch reasons, switching type and current network conditions, and judges whether to accept this stream handoff request in conjunction with local switchover policy.Above-mentionedly whether accept to flow handoff request and be meant that stream handoff request message is accepted or is rejected or accepted by part etc.Part is accepted to be meant that mobile node only allows the partial discharge of the change of current to be cut is switched to the purpose interface.Can also carry information such as tunnel encapsulation mode in the above-mentioned stream handover acknowledge message; Tunnel encapsulation mode in the stream handover acknowledge message indicates after switching, and the data flow after the switching of transmitting between purpose Mobile Access Gateway and the mobile node should encapsulate and send according to this tunnel encapsulation mode.
After S340, purpose Mobile Access Gateway receive stream handover acknowledge message, send stream Binding Update response message to regional mobile anchor point, to indicate the stream switching result.
S350, regional mobile anchor point receive stream Binding Update response message, and after determining to receive switching, regional mobile anchor point upgrades the routing iinformation at the change of current to be cut of local storage.
At regional mobile anchor point more after the new routing information, change of current switching to be cut is finished, the zone mobile anchor point should carry out route to the data flow after switching according to the routing iinformation after upgrading, stream (can be all flows of the change of current to be cut, also can be the partial discharge of the change of current to be cut) after promptly switching can transmit between mobile node shown in Figure 3, purpose Mobile Access Gateway and regional mobile anchor point.
Need to prove in addition, the foregoing description three switches to example and is described attached to carrying out stream after on the purpose Mobile Access Gateway by the purpose interface with mobile node, embodiment three can be transformed to purpose interface at mobile node equally and flow switching in attached to purpose Mobile Access Gateway process, specific implementation process after the conversion and the description of the foregoing description three basic identical (message name can be different) no longer describe in detail at this.
The foregoing description three can regional mobile anchor point initiate that stream switches and the situation not interrupting being connected between mobile node and the CN under, with the change of current to be cut from being connected between the purpose interface that being connected between the former interface of mobile node and the CN switches to mobile node and the CN.By the judgement whether allowing of utilizing that mobile node carries out switched, can satisfy the QoS needs of stream and network management requirement etc.In addition, embodiment three can finish the negotiations process of tunnel encapsulation mode in the stream handoff procedure.
Embodiment four, be that mobile node, purpose Mobile Access Gateway (MAG2) and regional mobile anchor point (LMA) are positioned at same PMIPv6 territory and this PMIPv6 territory has only been disposed under the situation of a unique LMA switching the initiator, the flow process of stream switching method as shown in Figure 4.
Among Fig. 4, mobile node by interface 1 (being former interface) attached on the MAG1, and by interface 2 attached on the MAG2, data flow 1 is transmitted between the interface 1 of mobile node and LMA by MAG1 (former Mobile Access Gateway).Being the data flow 1 that sends of LMA routes to the interface 1 of mobile node by MAG1, and data flow that mobile node sends by interface 11 routes to LMA by MAG1.Afterwards, mobile node is initiated the stream handoff procedure of data flow 1, switch finish after, data flow 1 is transmitted between the interface 2 of mobile node and LMA by MAG2 (purpose Mobile Access Gateway).In the present embodiment, the interface 1 of mobile node and interface 2 insert two MAG under the same LMA respectively.
S400, mobile node switch to interface 2 transmission according to data flow 1 needs of making a strategic decision out such as current network state information, traffic flow information and user preference information from interface 1, and promptly data flow 1 is the change of current to be cut, and interface 1 is former interface, and interface 2 is the purpose interface.
S410, mobile node send stream handoff request message by interface 2 to MAG2, carry the descriptor of data flow 1 or the sign of data flow 1 in this stream handoff request message.
After S420, MAG2 receive stream handoff request message, send the request of stream Binding Update to LAM.Carry the descriptor of data flow 1 or the sign of data flow 1 in this stream Binding Update request.
After S430, LMA receive the request of stream Binding Update, according to factors such as user contracting data, switch reasons, current network conditions and switching types, and judge whether to accept this stream Binding Update request in conjunction with local switchover policy, and judging under the situation of accepting this stream Binding Update request, LMA upgrades the routing iinformation of the data flow 1 of local storage.
S440, LMA send stream Binding Update response message to MAG2, whether accept to flow the Binding Update request to indicate it.
S450, MAG2 are after receiving stream Binding Update response message, and whether the interface 2 transmission stream handover acknowledge message to mobile node are accepted to indicate the stream handoff request.
After finishing the above-mentioned information interaction of present embodiment, data flow 1 switching is finished.Data flow 1 after the switching (can be all flows of data flow 1, also can be the partial discharge of data flow 1) can be transmitted between interface 2, MAG2 and the LMA of mobile node shown in Figure 4.
Need to prove in addition, the foregoing description four also can simply be transformed in the process of interface 2 attached to MAG2 of mobile node and flow switching, specific implementation process after the conversion and the description of the foregoing description four basic identical (message name can be different) no longer describe in detail at this.
The foregoing description four can mobile node initiate that stream switches and the situation not interrupting being connected between mobile node and the CN under, with data flow 1 from being connected between the interface 2 that being connected between the interface 1 of mobile node and the CN switches to mobile node and the CN.By the judgement whether allowing of utilizing that LMA carries out switched, can satisfy the QoS needs of data flow 1 and network management requirement etc.
Embodiment five, be that mobile node, purpose Mobile Access Gateway (MAG2) and regional mobile anchor point (LMA) are positioned at same PMIPv6 territory and this PMIPv6 territory has been disposed under the situation of a plurality of LMA switching the initiator, the flow process of stream switching method as shown in Figure 5.
Among Fig. 5, mobile node by interface 1 (being former interface) attached on the MAG1, and by interface 2 attached on the MAG2, data flow 1 is transmitted between the interface 1 of mobile node and LMA by MAG1 (former Mobile Access Gateway).Being the data flow 1 that sends of LMA routes to the interface 1 of mobile node by MAG1, and data flow that mobile node sends by interface 11 routes to LMA by MAG1.Afterwards, mobile node is initiated the stream handoff procedure of data flow 1, switch finish after, data flow 1 is transmitted between the interface 2 of mobile node and LMA by MAG2 (purpose Mobile Access Gateway).In the present embodiment, the interface 1 of mobile node and interface 2 can insert two MAG under the same LMA, also can insert two MAG under the Different L MA.
S500, mobile node switch to interface 2 transmission according to data flow 1 needs of making a strategic decision out such as current network state information, traffic flow information, user preference information from interface 1, and promptly data flow 1 is the change of current to be cut, and interface 1 is former interface, and interface 2 is the purpose interface.
S510, mobile node send stream handoff request message by interface 2 to MAG2, carry the descriptor of data flow 1 or the sign of data flow 1 in this stream handoff request message.
S520, MAG2 carry out the addressing process (being the search procedure of LMA address information) of LMA after receiving stream handoff request message, thereby obtain to provide for the interface 1 of mobile node the network address information of the LMA of service.
S530, MAG2 send stream Binding Update request message according to the network address information that obtains, and promptly MAG2 sends stream Binding Update request message to the LMA of the network address with above-mentioned acquisition.Carry the descriptor of data flow 1 or the sign of data flow 1 in this stream Binding Update request.
After S540, LMA receive stream Binding Update request message, according to factors such as user contracting data, switch reasons, current network conditions and switching types, and judge whether to accept this stream Binding Update request in conjunction with local switchover policy, and after judging the request of acceptance stream Binding Update, LMA upgrades the routing iinformation of the data flow 1 of local storage.
S550, LMA send stream Binding Update response message to MAG2, whether accept to flow the Binding Update request to indicate it.
After S560, MAG2 received stream Binding Update response message, whether the interface 2 transmission stream handover acknowledge message to mobile node were accepted to indicate the stream handoff request.
After finishing the above-mentioned information interaction of present embodiment, data flow 1 switching is finished.Data flow 1 after the switching (can be all flows of data flow 1, also can be the partial discharge of data flow 1) can be transmitted between interface 2, MAG2 and the LMA of mobile node shown in Figure 5.
Need to prove in addition, the foregoing description five also can simply be transformed in the process of interface 2 attached to MAG2 of mobile node and flow switching, specific implementation process after the conversion and the description of the foregoing description five basic identical (message name can be different) no longer describe in detail at this.
The foregoing description five can mobile node initiate that stream switches and the situation not interrupting being connected between mobile node and the CN under, with data flow 1 from being connected between the interface 2 that being connected between the interface 1 of mobile node and the CN switches to mobile node and the CN.By the judgement whether allowing of utilizing that LMA carries out switched, can satisfy the QoS needs of data flow 1 and network management requirement etc.
Embodiment six, to switch the initiator be mobile node, former Mobile Access Gateway (MAG1) under the LMA1, purpose Mobile Access Gateway (MAG2) under the LMA2 and LMA1 be positioned under the situation in different PMIPv6 territories with LMA2, the flow process of stream switching method is as shown in Figure 6.
Among Fig. 6, mobile node by interface 1 (being former interface) attached on the MAG1 under the LAM1, and by interface 2 attached on the MAG2 under the LAM2, data flow 1 is transmitted between the interface 1 of mobile node and LMA1 by MAG1.Being the data flow 1 that sends of LMA1 routes to the interface 1 of mobile node by MAG1, and data flow that mobile node sends by interface 11 routes to LMA1 by MAG1.Afterwards, mobile node is initiated the stream handoff procedure of data flow 1, switch finish after, data flow 1 is transmitted between the interface 2 of mobile node and LMA2 by the MAG2 under LMA1 and the LMA2.
In the present embodiment, the interface 1 of mobile node and interface 2 insert the MAG under the LMA in different PMIPv6 territory respectively, and LMA1 provides regional mobile management service for the interface 1 of mobile node, and LMA2 provides regional mobile management service for the interface 2 of mobile node.
S600, mobile node go out data flow 1 needs according to factor decision-makings such as current network state information, traffic flow information, user preference information and switch to interface 2 transmission from interface 1, and promptly data flow 1 is the change of current to be cut, and interface 1 is former interface, and interface 2 is the purpose interface.
S610, mobile node send stream handoff request message by interface 2 to MAG2, carry the descriptor of data flow 1 or the sign of data flow 1 in this stream handoff request message.
S620, MAG2 carry out the addressing process (being the search procedure of LMA address information) of LMA after receiving stream handoff request message, thereby obtain to provide for the interface 1 of mobile node the network address information of the LMA1 of service.Belong to different management domains owing to search the LMA1 of acquisition with MAG2, therefore, MAG2 can't directly send the request of stream Binding Update to LMA1.
S630, MAG2 send the request of stream Binding Update to LMA2.Carry the descriptor of data flow 1 or the sign of data flow 1 in this stream Binding Update request.Optionally, can also carry the network address information of the LMA1 of S620 addressing acquisition in this stream Binding Update request.
S640, LMA2 send circulation to LMA1 and send out request message after receiving the request of stream Binding Update.This circulation is sent out in the request message and is carried the descriptor of data flow 1 or the sign of data flow 1.Optionally, the tunnel encapsulation mode information that can also carry expectation in the request message is sent out in this circulation.The tunnel encapsulation mode of this expectation is meant: the packaged type that data flow adopted LMA2 expectation, after transmission is switched between itself and the LMA1.This tunnel encapsulation mode can be GRE encapsulation or IPinIP encapsulation etc.
Need to prove that LMA2 can obtain the network address information of LMA1 from stream Binding Update request message, and send a circulation request message according to this network address information; When stream Binding Update request message did not carry the network address information of LMA1, LMA2 also can obtain the network address information of LMA1 by addressing system.
After S650, LMA1 receive a circulation request message, according to factors such as user contracting data, switch reasons, current network conditions and switching types, and judge whether to accept circulation in conjunction with local switchover policy and send out request (promptly whether allowing the switching of the change of current to be cut), and after judging a request of accepting to circulate, LMA1 upgrades the routing iinformation of local data flow 1 of storing.
S660, LMA1 send circulation to send out response message to LMA2, to indicate the circulation request of whether accepting.Optionally, information such as can also carrying the tunnel encapsulation mode in the response message is sent out in this circulation.Tunnel encapsulation mode in the above-mentioned stream handover acknowledge message indicates after switching, should encapsulate data flow 1 according to this tunnel encapsulation mode between LMA1 and the LMA2, and the packet after the transmission encapsulation.
S670, LMA2 receive circulation send out reply after, send stream Binding Update response message to MAG2, whether be accepted to indicate the request of stream Binding Update.
S680, MAG2 are after receiving stream Binding Update response message, and whether the interface 2 transmission stream handover acknowledge message to mobile node are accepted to indicate the stream handoff request.
After finishing the above-mentioned information interaction of present embodiment, data flow 1 switching is finished.Data flow 1 after the switching (can be all flows of data flow 1, also can be the partial discharge of data flow 1) can be transmitted between interface 2, MAG2, LAM2 and the LMA1 of mobile node shown in Figure 6.
Need to prove in addition, the foregoing description six also can simply be transformed in the process of interface 2 attached to MAG2 of mobile node and flow switching, specific implementation process after the conversion and the description of the foregoing description six basic identical (message name can be different) no longer describe in detail at this.
The foregoing description six can mobile node initiate that stream switches and the situation not interrupting being connected between mobile node and the CN under, with data flow 1 from being connected between the interface 2 that being connected between the interface 1 of mobile node and the CN switches to mobile node and the CN.By the judgement whether allowing of utilizing that LMA2 carries out switched, can satisfy the QoS needs of data flow 1 and network management requirement etc.In addition, embodiment six can finish the negotiations process of tunnel encapsulation mode between LMA1 and the LMA2 in the stream handoff procedure.
Embodiment seven, be that mobile node, purpose Mobile Access Gateway (MAG2) and regional mobile anchor point (LMA) are positioned at same PMIPv6 territory and this PMIPv6 territory has only been disposed under the situation of a unique LMA switching the initiator, stream switching method and switching afterwards data flow transmission flow process as shown in Figure 7.
Among Fig. 7, mobile node by interface 1 (being former interface) attached on the MAG1, and by interface 2 attached on the MAG2, data flow 1 is transmitted between the interface 1 of mobile node and LMA by MAG1 (former Mobile Access Gateway).Being the data flow 1 that sends of LMA routes to the interface 1 of mobile node by MAG1, and data flow that mobile node sends by interface 11 routes to LMA by MAG1.Afterwards, mobile node is initiated the stream handoff procedure of data flow 1, switch finish after, data flow 1 is transmitted between the interface 2 of mobile node and LMA by MAG2 (purpose Mobile Access Gateway).In the present embodiment, the interface 1 of mobile node and interface 2 insert two MAG under the same LMA respectively.
S700, mobile node go out data flow 1 needs interface 1 according to factor decision-makings such as current network state information, traffic flow information, user preference information and switch to interface 2 transmission, and promptly data flow 1 is the change of current to be cut, and interface 1 is former interface, and interface 2 is the purpose interface.
S710, mobile node send stream handoff request message by interface 2 to MAG2, carry the descriptor of data flow 1 or the sign of data flow 1 in this stream handoff request message, and carry the tunnel encapsulation mode information of expectation, the tunnel encapsulation mode of expectation is meant the tunnel encapsulation mode that data flow adopted after transmission is switched between the interface 2 of mobile node and the MAG2, this tunnel encapsulation mode can encapsulate for GRE, also can be for IPinIP encapsulation etc.
After S720, MAG2 receive stream handoff request message, send the request of stream Binding Update to LAM.Carry the descriptor of data flow 1 or the sign of data flow 1 in this stream Binding Update request.
After S730, LMA receive the request of stream Binding Update, according to factors such as user contracting data, switch reasons, current network conditions and switching types, and judge whether to accept this stream Binding Update request in conjunction with local switchover policy, and under the situation of accepting this stream Binding Update request, LMA upgrades the routing iinformation of the data flow 1 of local storage.
S740, LMA send stream Binding Update response message to MAG2, whether accept to flow the Binding Update request to indicate it.
S750, MAG2 are after receiving stream Binding Update response message, and whether the interface 2 transmission stream handover acknowledge message to mobile node are accepted to indicate the stream handoff request.Also carry information such as tunnel encapsulation mode in this stream handover acknowledge message.This tunnel encapsulation mode indicates after switching, MAG2 encapsulates the data flow after switching according to this tunnel encapsulation mode, and the packet after the interface 2 of mobile node sends encapsulation, mobile node also should encapsulate the data flow after switching according to this tunnel encapsulation mode, and by the packet of interface 2 after MAG2 sends encapsulation.
After finishing the above-mentioned information interaction of present embodiment, data flow 1 switching is finished.Data flow 1 after the switching (can be all flows of data flow 1, also can be the partial discharge of data flow 1) can be transmitted between interface 2, MAG2 and the LAM of mobile node shown in Figure 7.
Need to prove in addition, the foregoing description seven also can simply be transformed in the process of interface 2 attached to MAG2 of mobile node and flow switching, specific implementation process after the conversion and the description of the foregoing description seven basic identical (message name can be different) no longer describe in detail at this.
The foregoing description seven can mobile node initiate that stream switches and the situation not interrupting being connected between mobile node and the CN under, with data flow 1 from being connected between the interface 2 that being connected between the interface 1 of mobile node and the CN switches to mobile node and the CN.By the judgement whether allowing of utilizing that LMA carries out switched, can satisfy the QoS needs of data flow 1 and network management requirement etc.In addition, embodiment seven can finish the negotiations process of tunnel encapsulation mode between the interface 2 of mobile node and the MAG2 at stream in the handoff procedure.
Embodiment eight, be positioned under the situation in same PMIPv6 territory for LMA1 and purpose Mobile Access Gateway (MAG2) and LMA1 switching the initiator, the flow process of stream switching method as shown in Figure 8.
Among Fig. 8, mobile node by interface 1 (being former interface) attached on the MAG1, and by interface 2 attached on the MAG2, data flow 1 is transmitted between the interface 1 of mobile node and LMA1 by MAG1 (former Mobile Access Gateway).Being the data flow 1 that sends of LMA1 routes to the interface 1 of mobile node by MAG1, and data flow that mobile node sends by interface 11 routes to LMA1 by MAG1.Afterwards, LMA1 initiates the stream handoff procedure of data flow 1, switch finish after, data flow 1 is transmitted between the interface 2 of mobile node and LMA1 by MAG2.In the present embodiment, the interface 1 of mobile node and interface 2 insert two MAG under the same LMA1 respectively.
S800, LMA1 go out data flow 1 needs according to factor decision-makings such as current network state information, traffic flow information etc., user preference information and switch to interface 2 transmission from interface 1, and promptly data flow 1 is the change of current to be cut, and interface 1 is former interface, and interface 2 is the purpose interface.
S810, LMA1 send stream Binding Update request message to MAG2, carry the descriptor of data flow 1 or the sign of data flow 1 in this stream Binding Update request message.
After S820, MAG2 receive stream Binding Update request message, to the interface 2 transmission stream handoff request message of mobile node.Carry the descriptor of data flow 1 or the sign of data flow 1 in the stream handoff request message.
After S830, mobile node receive stream handoff request message, according to factors such as user preference information, switch reasons, current network conditions and switching types, and judge whether to accept the request of stream Binding Update in conjunction with local switchover policy, and pass through interface 2 to MAG2 transmission stream handover acknowledge message, whether accept to flow handoff request (promptly whether allowing to switch) to indicate.
After S840, MAG2 receive stream handover acknowledge message, send stream Binding Update response message, whether be accepted to indicate the request of stream Binding Update to LMA1.
After S850, LMA1 received stream Binding Update response message, after judging the request of stream Binding Update and be accepted according to the information of carrying in the stream Binding Update response message, LMA1 upgraded the routing iinformation of the data flow 1 of local storage.
After finishing the above-mentioned information interaction of present embodiment, data flow 1 switching is finished.Data flow 1 after the switching (can be all flows of data flow 1, also can be the partial discharge of data flow 1) can be transmitted between interface 2, MAG2 and the LAM1 of mobile node shown in Figure 8.
The foregoing description eight can LMA1 initiate that stream switches and the situation not interrupting being connected between mobile node and the CN under, with data flow 1 from being connected between the interface 2 that being connected between the interface 1 of mobile node and the CN switches to mobile node and the CN.By the judgement whether allowing of utilizing that mobile node carries out switched, can satisfy the QoS needs of data flow 1 and network management requirement etc.
Embodiment nine, stream switched system.The structure of this system is shown in accompanying drawing 9A.
Stream switched system among Fig. 9 A comprises: switch initiator 900, purpose Mobile Access Gateway 910 and handover decisions side 920.Optionally, the stream switched system can also comprise: the memory device 930 that stores the regional mobile anchor point configuration information of change of current correspondence to be cut.Memory device 930 is and the independent network equipments that are provided with of purpose Mobile Access Gateway 910, and memory device 930 can be for having the network equipment of DNS function, also can be for having the network equipment of AAA or dhcp server functionality.
Switch initiator 900, be used to obtain to be switched stream information, and send first request that carries above-mentioned to be switched stream information to purpose Mobile Access Gateway 910.
Switch initiator 900 can according in current network state information, traffic flow information and the user preference information any one or two or three determine the change of current to be cut arbitrarily, thereby obtain to be switched stream information.Switching initiator 900 also can adopt other modes to obtain to be switched stream information.Present embodiment does not limit the specific implementation process that initiator 900 obtains to be switched stream information of switching.Above-mentioned current network state information, traffic flow information, user preference information and to be switched stream information have the content that comprises such as the description of above-mentioned method embodiment, in this no longer repeat specification.
Purpose Mobile Access Gateway 910 is used to receive first request, and sends the message that carries to be switched stream information to handover decisions side 920.The message that carries to be switched stream information that purpose Mobile Access Gateway 910 sends can be called second request.
In handover decisions side is under the situation of regional mobile anchor point, when purpose Mobile Access Gateway 910 sends second request, should inquire about the regional mobile anchor point information of change of current correspondence to be cut earlier, the address information of regional mobile anchor point information such as regional mobile anchor point etc.Purpose Mobile Access Gateway 910 can only be searched the regional mobile anchor point information of change of current correspondence to be cut in its stored configuration information.Purpose Mobile Access Gateway 910 also can only be searched the regional mobile anchor point information of change of current correspondence to be cut in memory device 930 stored configuration information, be that purpose Mobile Access Gateway 910 is after receiving first request, directly to memory device 930 transmission query requests.In addition, purpose Mobile Access Gateway 910 can also be searched earlier the regional mobile anchor point information of change of current correspondence to be cut in its stored configuration information, when the regional mobile anchor point information of searching less than coupling, send query requests to memory device 930 again, in memory device 930 stored configuration information, to search the regional mobile anchor point information of change of current correspondence to be cut.In addition, the mode that purpose Mobile Access Gateway 910 sends the message that carries to be switched stream information to handover decisions side 920 can be for directly sending to message handover decisions side 920, also can be for message being sent to handover decisions side 920 by other regional mobile anchor points, description among specific implementation process such as the above-mentioned method embodiment is in this no longer repeat specification.
Handover decisions side 920 is used to receive the message that carries to be switched stream information, and judges whether to allow the switching of the change of current to be cut, returns the judged result information switched of whether allowing to purpose Mobile Access Gateway 910.
Purpose Mobile Access Gateway 910 sends first request response according to the judged result information that receives to switching initiator 900.
In addition, when 920 judged result is switched for permission in handover decisions side,, to be switched stream information upgrades the routing iinformation of this change of current to be cut for providing the regional mobile anchor point of service.
Above-mentioned switching initiator 900 can be mobile node, also can be network side node.Network side node is as providing the regional mobile anchor point of service for the current change of current to be cut.
When above-mentioned switching initiator 900 was mobile node, handover decisions side 920 was regional mobile anchor point.When above-mentioned switching initiator 900 was regional mobile anchor point, handover decisions side 920 was a mobile node.
When switching initiator 900 when be mobile node, first any one or a plurality of information that can also carry in asking in the tunnel encapsulation mode of switching type, switch reasons and expectation that mobile node sends.Certainly mobile node also can be carried at the information such as tunnel encapsulation mode of switching type, switch reasons and expectation in other message of removing first request, and to 910 transmissions of purpose Mobile Access Gateway.
The implication of the tunnel encapsulation mode of above-mentioned switching type, switch reasons and expectation such as the description among the above-mentioned method embodiment are in this no longer repeat specification.
In addition, when switching initiator 900 was mobile node, above-mentioned first request can be the stream handoff request; When the switching initiator was regional mobile anchor point, above-mentioned first request can be the request of stream Binding Update.
Be mobile node or regional mobile anchor point no matter switch initiator 900, switch initiator 900 and all can comprise: switch stream information module 901, first sending module 902 and first receiver module 903.
Switch stream information module 901, be used for according to current network state information, traffic flow information and user preference information any one or a plurality ofly determine to be switched stream information.Switching stream information module 901 can determine to be switched stream information according to other factors, switches the stream information module and also can obtain to be switched stream information or the like from the order that receives.
First sending module 902 is used for the to be switched stream information that switching stream information module 901 is determined is carried at first request, and sends first request to purpose Mobile Access Gateway 910.In addition, first sending module 902 can also be carried at any one or a plurality of information in the tunnel encapsulation mode of switching type, switch reasons and expectation in first request.
First receiver module 903 is used to receive first request response that purpose Mobile Access Gateway 910 returns.
When switching initiator 900 is regional mobile anchor point, the structure of switching initiator 900 is shown in accompanying drawing 9B, switching initiator 900 among Fig. 9 B also includes the first via by update module 904 except comprising above-mentioned switching stream information module 901, first sending module 902 and first receiver module 903.
The first via is by update module 904, be used for after first receiver module 903 receives first request response, judge according to the information of carrying in first request response whether handover decisions side 900 allows the switching of the change of current to be cut, when judging the permission switching, upgrade the routing iinformation of the change of current to be cut, judging when not allowing to switch, do not carrying out of the renewal operation of to be switched stream by information.
When switching initiator 900 is mobile node, and when handover decisions side 920 was regional mobile anchor point, the structure of handover decisions side 900 was shown in accompanying drawing 9C.Regional mobile anchor point among Fig. 9 C comprises: second receiver module 921, judge module 922, switch decision module 923, secondary route update module 924, acquisition module 925 and second sending module 926.
Second receiver module 921 is used to receive the message that carries to be switched stream information.This message can be the stream Binding Update request that 910 transmission of purpose Mobile Access Gateway come, and also can be that request is sent out in the circulation that other regional mobile anchor point transmission come.
Judge module 922 is used for after second receiver module 921 receives the message that carries to be switched stream information, judges whether the regional mobile anchor point at its place can intercept and capture this change of current to be cut.
Switch decision module 923, the judged result that is used at judge module 922 is in the time of intercepting and capturing the change of current to be cut, carry out the decision operation that whether allows the change of current to be cut to switch, judgement structure at judge module 922 is in the time of can not intercepting and capturing the change of current to be cut, not carry out the decision operation that whether allows the change of current to be cut to switch.Switch decision module 923 can according in current network state information, traffic flow information, user contracting data, switch reasons and the switching type any one or a plurality of, and the local switchover policy of calmodulin binding domain CaM mobile anchor point judges whether to allow the switching of the change of current to be cut.When the regional mobile anchor point among Fig. 9 C did not comprise judge module 922, switch decision module 923 can be after second receiver module 921 receives the message that carries to be switched stream information, and directly whether execution allows the decision operation that the change of current to be cut is switched.
Secondary route update module 924, the judged result that is used in switch decision module 923 is when allowing the switching of the change of current to be cut, upgrades the routing iinformation of the change of current to be cut.
Acquisition module 925, the judged result that is used at judge module 922 is in the time of can not intercepting and capturing the change of current to be cut, to obtain the regional mobile anchor point information that can intercept and capture the change of current to be cut.
Second sending module 926, be used for returning to purpose Mobile Access Gateway 910 the judged result information of switch decision module 923, the information of obtaining according to acquisition module 925 sends the message that carries to be switched stream information to the regional mobile anchor point that can intercept and capture the change of current to be cut.Second sending module 926 is sending to the regional mobile anchor point that can intercept and capture the change of current to be cut when carrying the message of to be switched stream information, can also carry the information such as tunnel encapsulation mode information, switch reasons, switching type of expectation in this message.When second sending module 926 returns the judged result information of switch decision module 923 to purpose Mobile Access Gateway 910, via the regional mobile anchor point in the MPIPv6 territory under the purpose Mobile Access Gateway 910, then second sending module 926 can also will send together at tunnel encapsulation mode information between the regional mobile anchor point and judged result information if desired.When the regional mobile anchor point among Fig. 9 C did not comprise acquisition module 925, second sending module 926 was not carried out the above-mentioned operation that sends the message that carries to be switched stream information to the regional mobile anchor point that can intercept and capture the change of current to be cut.
The structure of purpose Mobile Access Gateway 910 is shown in accompanying drawing 9D.Purpose Mobile Access Gateway 910 among Fig. 9 D comprises: the 3rd receiver module 911, enquiry module 912 and the 3rd sending module 913.
The 3rd receiver module 911 is used to receive and switches first request that carries to be switched stream information that initiator 900 sends, and receives the judged result information that whether allows the change of current to be cut to switch that handover decisions side 920 returns.
Enquiry module 912 is used for after the 3rd receiver module 911 receives first request, the regional mobile anchor point of inquiry change of current correspondence to be cut in purpose Mobile Access Gateway 910 stored configuration information at its place and/or memory device 930 stored configuration information.That is to say that enquiry module 912 can only be searched the regional mobile anchor point information of change of current correspondence to be cut in purpose Mobile Access Gateway 910 stored configuration information at its place.Enquiry module 912 also can only be searched the regional mobile anchor point information of change of current correspondence to be cut in memory device 930 stored configuration information; In addition, enquiry module 912 can also be searched earlier the regional mobile anchor point information of change of current correspondence to be cut in purpose Mobile Access Gateway 910 stored configuration information at its place, when the regional mobile anchor point information of searching less than coupling, send query requests to memory device 930 again, in memory device 930 stored configuration information, to search the regional mobile anchor point information of change of current correspondence to be cut.
The regional mobile anchor point information that enquiry module 912 inquiry obtains comprises: as the regional mobile anchor point information of handover decisions side, and/or the regional mobile anchor point information in the PMIPv6 territories not as handover decisions side and under the purpose Mobile Access Gateway 910.
Regional mobile anchor point under purpose Mobile Access Gateway 910 in the PMIPv6 territory is not under the situation of handover decisions side, and enquiry module 912 can obtain above-mentioned two regional mobile anchor point information by the one query process.If enquiry module 912 has only obtained a regional mobile anchor point information by the one query process, then enquiry module 912 is after the purpose Mobile Access Gateway 910 of judging its place can not carry out information interaction with the regional mobile anchor point of this acquisition, and enquiry module 912 can obtain the regional mobile anchor point information in its place purpose Mobile Access Gateway 910 affiliated PMIPv6 territories again.
The 3rd sending module 913, be used for sending the message that carries to be switched stream information, and send first request response to switching initiator 900 according to the judged result information that whether allows the change of current to be cut to switch that the 3rd receiver module 911 receives to the regional mobile anchor point that enquiry module 912 inquires.Switching initiator 900 is under the situation of mobile node, and the 3rd sending module 913 can also send to mobile node with being carried in first request response at the tunnel encapsulation mode information of mobile node between the purpose Mobile Access Gateway.
Under the situation of two regional mobile anchor point information that enquiry module 912 obtains, the 3rd sending module 913 can send being carried in the message together as the regional mobile anchor point information of handover decisions side 920 and to be switched stream information.
The foregoing description nine can mobile node or regional mobile anchor point initiate that stream switches and the situation not interrupting being connected between mobile node and the CN under, with the change of current to be cut from being connected between the purpose interface that being connected between the former interface of mobile node and the CN switches to mobile node and the CN.By the judgement whether allowing of utilizing that handover decisions side carries out switched, can satisfy the QoS demand of stream and network management requirement etc.In addition, embodiment one can finish the negotiations process of the tunnel encapsulation mode in each section path after the change of current to be cut is switched in the stream handoff procedure.
In addition, in said system is described write up as the structure of the switching device shifter that switches the initiator, in the following embodiments no longer separately to describing as the switching device shifter that switches the initiator.
Embodiment ten, regional mobile anchor point.
Regional mobile anchor point in the present embodiment can comprise: switch stream information module 901, first sending module 902, first receiver module 903 and the first via by update module 904.
Regional mobile anchor point in the present embodiment also can comprise: second receiver module 921, switch decision module 923, secondary route update module 924 and second sending module 926.Optionally, Ci Shi regional mobile anchor point can also comprise: judge module 922 and acquisition module 925.
Regional mobile anchor point in the present embodiment also can comprise simultaneously: switch stream information module 901, first sending module 902, first receiver module 903, the first via by update module 904, second receiver module 921, switch decision module 923, secondary route update module 924 and second sending module 926.Optionally, Ci Shi regional mobile anchor point can also comprise: judge module 922 and acquisition module 925.
Operation that each module is carried out in the present embodiment such as the description in the above-mentioned system embodiment are in this no longer repeat specification.
Embodiment 11, purpose Mobile Access Gateway.
Purpose Mobile Access Gateway in the present embodiment can comprise: the 3rd receiver module 911, enquiry module 912 and the 3rd sending module 913.Operation that each module is carried out in the present embodiment such as the description in the above-mentioned system embodiment are in this no longer repeat specification.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential hardware platform, can certainly all implement, but the former is better execution mode under a lot of situation by hardware.Based on such understanding, all or part of can the embodying that technical scheme of the present invention contributes to background technology with the form of software product, this computer software product can be stored in the storage medium, as ROM/RAM, magnetic disc, CD etc., comprise that some instructions are with so that a computer equipment (can be a personal computer, server, the perhaps network equipment etc.) carry out the described method of some part of each embodiment of the present invention or embodiment.
Though described the present invention by embodiment, those of ordinary skills know, the present invention has many distortion and variation and do not break away from spirit of the present invention, and the claim of application documents of the present invention comprises these distortion and variation.

Claims (14)

1. a stream switching method is characterized in that, comprising:
Handover decisions side receives switches the to be switched stream information that the initiator sends by the purpose Mobile Access Gateway;
Described handover decisions side judges whether to allow to switch, and return judged result information to described purpose Mobile Access Gateway, and under the situation that judged result is switched for permission, provide the regional mobile anchor point of service to upgrade the routing iinformation of the described change of current to be cut for described to be switched stream information.
2. the method for claim 1 is characterized in that, described method also comprises:
Switch the initiator according in current network state information, traffic flow information and the user preference information any one or a plurality ofly determine to be switched stream information, and send first request that carries described to be switched stream information to the purpose Mobile Access Gateway.
3. method as claimed in claim 1 or 2 is characterized in that:
When described switching initiator is mobile node, any one in the tunnel encapsulation mode between described switching initiator also carries switching type, switch reasons and mobile node expectation in first request that carries to be switched stream information that the purpose Mobile Access Gateway sends and the purpose Mobile Access Gateway or a plurality of;
Perhaps,
When described switching initiator is regional mobile anchor point, any one in the tunnel encapsulation mode between described purpose Mobile Access Gateway also carries switching type, switch reasons and the expectation of purpose Mobile Access Gateway in the message that carries to be switched stream information that mobile node sends and the mobile node or a plurality of;
Described switching type represents that whole flows of the described change of current to be cut all switch or the partial discharge of the described change of current to be cut switches;
Described switching type, switch reasons are used for handover decisions side and judge whether to allow to switch, and described tunnel encapsulation mode is used for the tunnel encapsulation mode and consults.
4. method as claimed in claim 1 or 2 is characterized in that, when described handover decisions side was regional mobile anchor point, described method also comprised:
Described purpose Mobile Access Gateway is inquired about the regional mobile anchor point of described change of current correspondence to be cut in the configuration information of described purpose Mobile Access Gateway and/or memory device, stores, and sends the message that carries described to be switched stream information to the first area mobile anchor point that inquires;
Described first area mobile anchor point sends the message that carries to be switched stream information receiving the message that carries described to be switched stream information and judging can not intercept and capture the described change of current to be cut the time to the second area mobile anchor point that can intercept and capture the change of current to be cut;
And described method also comprises:
Under the situation that does not have the second area mobile anchor point, the stream after the switching transmits between first area mobile anchor point, purpose Mobile Access Gateway and mobile node; Or
Under the situation that has the second area mobile anchor point, the stream after the switching transmits between first area mobile anchor point, second area mobile anchor point, purpose Mobile Access Gateway and mobile node.
5. method as claimed in claim 4 is characterized in that:
Described first area mobile anchor point also carries the tunnel encapsulation mode information between the desired region mobile anchor point in the described message that described second area mobile anchor point sends, the tunnel encapsulation mode information between the described desired region mobile anchor point is used for the tunnel encapsulation mode and consults.
6. method as claimed in claim 1 or 2 is characterized in that:
When described handover decisions side is regional mobile anchor point, described judge whether allow to switch comprise:
Described regional mobile anchor point according in current network state information, traffic flow information, user contracting data, switch reasons and the switching type any one or a plurality of and judge whether allow to switch in conjunction with local switchover policy; Perhaps
When described handover decisions side is mobile node, described judge whether allow to switch comprise:
Described mobile node according in current network state information, traffic flow information, user preference information, switch reasons and the switching type any one or a plurality of and judge whether allow to switch in conjunction with local switchover policy.
7. method as claimed in claim 2 is characterized in that:
When described handover decisions side is regional mobile anchor point, after described regional mobile anchor point is judged and allowed to switch, upgrade the routing iinformation of the described change of current to be cut of its storage; Perhaps
When described handover decisions side was mobile node, the regional mobile anchor point that initiate to switch upgraded the routing iinformation of the described change of current to be cut of its storage after receiving first request response that described purpose Mobile Access Gateway returns.
8. method as claimed in claim 2 is characterized in that:
When described switching initiator was mobile node, described purpose Mobile Access Gateway also carried the tunnel encapsulation mode information after stream switches in first request response that described mobile node sends; Perhaps
When described switching initiator was regional mobile anchor point, described mobile node also carried the tunnel encapsulation mode information after stream switches in the message of carrying judged result that described purpose Mobile Access Gateway sends.
9. a stream switched system is characterized in that, comprising:
The purpose Mobile Access Gateway is used to receive and switches first request that carries to be switched stream information that the initiator sends, and sends the message that carries described to be switched stream information to handover decisions side;
Handover decisions side, be used to receive described to be switched stream information, judge whether to allow to switch, and return judged result information to described purpose Mobile Access Gateway, and when judged result is switched for permission, provide the regional mobile anchor point of service to upgrade the routing iinformation of the described change of current to be cut for described to be switched stream information;
Described purpose Mobile Access Gateway sends first request response according to the judged result information that receives to described switching initiator.
10. a switching device shifter is the switching initiator, it is characterized in that described switching initiator comprises:
Switch the stream information module, be used for according to current network state information, traffic flow information and user preference information any one or a plurality ofly determine to be switched stream information;
First sending module is used for sending first request that carries described to be switched stream information to the purpose Mobile Access Gateway;
First receiver module is used to receive first request response that the purpose Mobile Access Gateway returns.
11. device as claimed in claim 10 is characterized in that, described switching initiator is regional mobile anchor point, and described regional mobile anchor point also comprises:
The first via is used for upgrading the routing iinformation of the described change of current to be cut when first receiver module receives first request response and judges the permission switching by update module.
12. a network equipment for regional mobile anchor point, is characterized in that, comprising:
Second receiver module is used to receive to be switched stream information;
Switch decision module is used to judge whether to allow the described change of current to be cut to switch;
The secondary route update module is used for upgrading the routing iinformation of the described change of current to be cut when the judged result of switch decision module is switched for permission;
Second sending module is used for returning to the purpose Mobile Access Gateway judged result information of switch decision module.
13. the network equipment as claimed in claim 12 is characterized in that, the described network equipment also comprises:
Judge module is used for after second receiver module receives described to be switched stream information, judges whether regional mobile anchor point can intercept and capture the described change of current to be cut;
Described switch decision module is in the time of intercepting and capturing the change of current to be cut in the judged result of described judge module, judges whether to allow the described change of current to be cut to switch;
Acquisition module, the judged result that is used at described judge module is in the time of can not intercepting and capturing the change of current to be cut, to obtain the regional mobile anchor point information that can intercept and capture the change of current to be cut;
Described second sending module, the information that also is used for obtaining according to described acquisition module sends the message that carries to be switched stream information to the described regional mobile anchor point that can intercept and capture the change of current to be cut.
14. a network equipment for the purpose Mobile Access Gateway, is characterized in that, comprising:
The 3rd receiver module is used to receive and switches first request that carries to be switched stream information that the initiator sends, and the judged result information switched of whether allowing of receiving that handover decisions side returns;
Enquiry module is used for the regional mobile anchor point in the described change of current correspondence to be cut of configuration information inquiry of described purpose Mobile Access Gateway stored configuration information and/or memory device, stores;
The 3rd sending module is used for sending the message that carries described to be switched stream information to the regional mobile anchor point that described enquiry module inquires, and the judged result information that receives according to the 3rd receiver module sends first request response to switching the initiator.
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CN102238633B (en) * 2010-04-28 2015-09-16 中兴通讯股份有限公司 A kind of dynamic control method of data distribution and system
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CN103052125B (en) * 2011-10-13 2018-03-23 广州市瑞雅通信技术有限公司 Flow migration method and device
CN103096343B (en) * 2011-11-01 2018-02-16 中兴通讯股份有限公司 One kind flows policy management method on the move and system
CN103096394B (en) * 2011-11-01 2017-10-17 中兴通讯股份有限公司 One kind stream policy management method on the move and system
WO2015176318A1 (en) * 2014-05-23 2015-11-26 华为技术有限公司 A method, network system, and sdn controller for moving a data stream
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