CN100593929C - Mobile switch method of wireless packet network - Google Patents
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Abstract
The invention discloses a method of mobile handoff in wireless packet network, which comprises that: a target community is predicted to apply novel care of address and cache data; whether a mobile node is opened or not on a network layer is judged and if so, an operation related to the prediction is completed and whether the target community is under the opening condition is judged on an application layer; the handoff of a link layer is conducted and whether the predicted result is right or not is tested, if so, the next step is carried out or otherwise the next step after reapplying to arrange new care of addresses is carried out; the mobile node bound and a bidirectional provisional tunnel is arranged; whether the mobile node is under the opening condition is judged on the application layer, if so, the next step is carried out, or otherwise the mobile node is registered and renewed; whether the prediction is right or not is judged, if right, path optimization is conducted and data issent by the optimized path, or otherwise the bidirectional provisional tunnel is rearranged and the path optimization is conducted after the mobile node is registered and renewed. The invention is beneficial to reducing the time delay of the mobile handoff and improving the security and the service quality.
Description
Technical field
The present invention relates to the packet network technologies field, particularly the mobile switch method in the radio packet network.
Background technology
Along with development of internet technology, broadband, mobile, the all-IPization of next generation network have become common recognition.In research to next generation network, numerous research focuses has appearred, and one of them focus is how to realize moving the realization of switching.
As everyone knows, in the OSI seven layer model, a whole network system can be divided into 7 layers, in accordance with the order from top to bottom, is respectively application layer, presentation layer, session layer, transport layer, network layer, data link layer and physical layer.Network layer wherein defines bag transmission end to end, and data link layer has defined how to transmit data on single link, and application layer then provides the interface of a network-oriented for application program.In moving the implementation procedure of switching, how using mobile IP v 6 to carry out on the basis that network layer switches switching in conjunction with other layers, thereby realize having service quality to guarantee and safe and reliable switching the problem that has become those skilled in the art's extensive concern and attempted to solve.
Moving an importance of switching is the mobile switching of voice communication, a target of the mobile hand off signaling that designs at voice communication is to guarantee service quality, comprise and reduce handover delay and packet loss, the another one target is exactly guarantee in the wireless access packet network voice communication under the handoff environment safe, reliable, to networking authentication wherein, safety, AAA message is controlled and is managed.Research work relevant in the prior art is as follows:
1, mobile IPv 6 protocol:
The IETF of Internet working group (Internet Engineering Task Force) has formulated mobile IPv 6 protocol.Mobile IPv 6 protocol has solved roaming and the switching problem of mobile subscriber in the IPv6 network.Because the address resource in mobile IPv 6 protocol is abundant, the mobile node that is in the other places can be assigned to an entire arrangement Care-of Address, need not foreign agent entity.Simultaneously by routing optimality, mobile node can with Correspondent Node without the home agent direct communication, avoided the triangle route of inefficiency.But the time delay that mobile IPv 6 protocol produces when the user is switched is longer, can have influence on the service quality when switching.About the visible list of references 1:D.Johnson of the details of mobile IPv 6 protocol, C.Perkins, J.Arkko, " Mobility Support in IPv6 ", IETF RFC3775.
2, fast moving IPv6 agreement:
Compare with mobile IPv 6 protocol, fast moving IPv6 agreement adopts three kinds of measures to reduce handover delay:
1, pre-configured new Care-of Address before mobile node switches reduces the address configuration time delay;
2, before switching, obtain target cell information, reduce to move and detect time delay;
3, set up the interim tunnel of new and old minizone, reduce the Binding Update time delay.
Adopted forecasting mechanism in the fast moving IPv6 agreement, when mobile node switches, the handoff links information of mobile node around current couple in router application, reply related news by current couple in router, after the handoff links information around mobile node is received, dispose a new Care-of Address voluntarily, and the address of the couple in router of the new sub-district that obtains predicting according to new Care-of Address, the couple in router that current couple in router sends to packet the new sub-district of prediction carries out buffer memory, after the mobile node switching was finished, the couple in router of new sub-district sent to mobile node with cached data packet.
If above-mentioned mobile handoff procedure is predicted successfully, can significantly reduce handover delay, but, then can cause data to lose in a large number as prediction of failure.In addition, the action need of configuration address voluntarily in above-mentioned mobile handoff procedure is known the condition information of neighbor cell, and after the generation of new Care-of Address, also needs to carry out the duplicate address detection operation.Therefore, still there is the long problem of time delay in the mobile handoff procedure among the fast moving IPv6.About the visible list of references 2:R.Koodli of the details of fast moving IPv6 agreement, " Fast Handovers for Mobile IPv6 ", IETF RFC4068.
3, RSVP (MRSVP) under the mobile environment:
MRSVP is that the expansion to RSVP realizes the resource reservation under the mobile environment.The notion of mobile inventory has been introduced in the position that MRSVP protocol requirement prediction main frame may arrive future among the MRSVP, write down the cell list that mobile node may be visited recently in the mobile inventory.After mobile node moves to a new sub-district, upgrade mobile inventory according to current location, and it is sent to the mobile agent of all sub-districts in session transmit leg and the inventory, the transmit leg of session and the mobile agent of these sub-districts are mutual, be this communication reserved resource in advance, the shortcoming of this scheme is that the wasting of resources is bigger.About the visible list of references 3:ANUP of the details of MRSVP agreement KUMAR TALUKDAR, " MRSVP:A Resource Reservation Protocol for an Integrated ServiceNetwork With Mobile Host ".
4, based on the RSVP of multicast:
This scheme identifies each mobile node with a multicast address, all mobile nodes transmissions, reception RSVP message and IP packet are all undertaken by the multicast mode, and the mobile visible of node is group membership's change.This scheme has adopted the forecasting mechanism that is similar to MRSVP, next step position that will visit of mobile host is added in the multicast number in advance, in advance reserved resource.For the visible list of references 4:W.Chen of details based on the RSVP of multicast, L.Huang, et al.RSVP MobilitySupport:A Signaling Protocol for Integrated Services Internet with MobileHosts[C] .IEEE INFOCOM ' 2000.
Summary of the invention
The objective of the invention is to overcome the long defective of time delay in the existing fast moving IPv6 agreement, thereby provide a kind of time delay short, the mobile switch method that fail safe and service quality are high.
To achieve these goals, the invention provides the mobile switch method in a kind of radio packet network, may further comprise the steps:
After step 1), mobile node predict and are about to the incident of switching, the Target cell that prediction will enter, according to the identification number, IP address and the new Care-of Address that predict the outcome to mobile node application target couple in router, and send to the packet of mobile node by the couple in router buffer memory of current area;
Step 2), after mobile node obtains new Care-of Address, the application layer of mobile node judges whether mobile node is in on-state, if, finish and predicting relevant handover operation, be used to download the AAA message of mobile node and set up two-way resource reservation tunnel between the couple in router, otherwise, wait for the link layer switch indicating information, execution in step 6);
Step 3), mobile node carry out the switching of link layer;
Whether after step 4), mobile node were finished the link layer switching, the trigger network layer switched, and correct in the result of network layer check handoff predictions, if correct, carry out next step, otherwise application was carried out next step after disposing new Care-of Address more again;
Binding between step 5), mobile node realization and current area couple in router is set up the couple in router of current area and the two-way interim tunnel between mobile node, and by two-way interim tunnel institute's cached data packet in the step 1) is mail to mobile node;
After the application layer of step 6), mobile node is received switch indicating information, judge in application layer whether mobile node is predicted accurately, and judge whether mobile node is in on-state, if prediction accurately and be in on-state, then carry out register update in the couple in router of Target cell, execution in step 9 then); If forecasting inaccuracy is true and be in on-state, then jump to step 7); If mobile node is in non-on-state then jumps to step 8);
Step 7), be in on-state when mobile node, but when early stage, forecasting inaccuracy was true, rebulid the two-way resource reservation tunnel between the couple in router of the couple in router of current area and Target cell, and in the server of the couple in router of Target cell, realize register update to mobile node, execution in step 9 then);
Step 8), mobile node are in non-on-state, then end operation after realizing the register update of mobile node on the server of the couple in router of Target cell;
Step 9), mobile node carry out the routing optimality operation, behind routing optimality, the data that send to mobile node are transmitted by optimized path.
In the technique scheme, described step 1) specifically comprises following performing step:
Step 1-1), the link layer of mobile node scanning and predicting after mobile node is about to the incident of switching, send the pre-switch indication with the trigger network layer; In described pre-switch indication, indicated the identification number of the couple in router of target of prediction sub-district;
Step 1-2), after the network layer of mobile node receives the pre-switch indication, the couple in router of notice sub-district, the current place of mobile node;
Step 1-3), the couple in router of current area sends message to the couple in router of described target of prediction sub-district, is the new Care-of Address of the described Target cell of mobile node application;
Step 1-4), the couple in router enabling address layoutprocedure of described target of prediction sub-district, be the new Care-of Address of described mobile node configuration;
Step 1-5), the couple in router of the described target of prediction sub-district new Care-of Address that will configure sends to the couple in router of current area;
Step 1-6), the couple in router of current area sends to described mobile node with identification number, IP address and the new Care-of Address of the couple in router of described target of prediction sub-district;
Step 1-7), the couple in router buffer memory of current area sends to the packet of mobile node.
In the technique scheme, in described step 2) in, the described handover operation relevant with prediction is meant:
Step 2-1), the application layer of mobile node sends handoff predictions message to the application layer of the couple in router of described target of prediction sub-district; Described handoff predictions message comprises the identification number and the traffic stream service mass parameter of the telephone number of mobile node, current couple in router;
Step 2-2), the couple in router of described target of prediction sub-district is downloaded the AAA message of mobile node to the couple in router request of current area;
Step 2-3), the couple in router of described current area is with the couple in router of the described target of prediction of the AAA message informing sub-district of mobile node;
Step 2-4), the couple in router of described target of prediction sub-district sends authentication message to described mobile node;
Step 2-5), mobile node answer certificate message is carried out authentication;
Step 2-6), the couple in router of described target of prediction sub-district extracts the QoS parameter in the handoff predictions message, is established to the resource reservation tunnel of current area couple in router;
Step 2-7), set up the resource reservation tunnel of current area couple in router to target of prediction sub-district couple in router;
Step 2-8), relevant with prediction handover operation is finished.
When setting up described resource reservation tunnel, at first send PATH message in the RSVP to the couple in router of setting up the reciever place by the couple in router of setting up the initiator place, reply RESV message in the RSVP by the couple in router of setting up the reciever place then, thereby set up two resource reservation tunnels between the router.
In the technique scheme, in described step 4), specifically may further comprise the steps:
Step 4-1), after the link layer of mobile node finishes switching, send one to network layer and switch indication and switch, comprised the identification number of the couple in router of the Target cell that will switch in this Indication message with the trigger network layer;
Step 4-2), after the network layer of mobile node is received and is switched indication, whether the identification number of checking the Target cell couple in router that will switch to is consistent with the identification number of described target of prediction sub-district couple in router, if it is consistent, expression is predicted successfully, execution in step 5), otherwise prediction of failure is carried out next step;
Step 4-3), mobile node is to the new Care-of Address of the couple in router application of described Target cell;
Step 4-4), the couple in router enabling address layoutprocedure of described Target cell, be the new Care-of Address of mobile node configuration;
Step 4-5), the couple in router of the described Target cell new Care-of Address that will prepare sends to mobile node.
In the technique scheme, describedly set up two-way interim tunnel and may further comprise the steps:
Step 5-1), mobile node sends the neighbor advertisement message that comprises binding update messages to the couple in router of Target cell;
Step 5-2), the couple in router of Target cell takes out the binding update messages in the neighbor advertisement message, and sends to the couple in router of current area, comprised the new and old Care-of Address of mobile node in the described binding update messages;
Step 5-3), after the couple in router of current area receives binding update messages, the success of notice mobile node Binding Update;
Step 5-4), the couple in router of current area is set up the two-way interim tunnel of the couple in router of current area to mobile node;
Step 5-5), the couple in router of current area mails to mobile node by two-way interim tunnel with cached data packet.
In the technique scheme, in described step 6), described register update operation specifically may further comprise the steps:
Step 6-1) mobile node with the relevant EO of prediction, and receive after link layer switches indication, send the request of networking to the couple in router of Target cell and indicate, the couple in router mobile node of notification target sub-district has entered new sub-district;
Step 6-2), the couple in router of Target cell sends message to registrar, to realize the register update to described mobile node;
Step 6-3), after registrar finishes register update, send acknowledge message;
Step 6-4), registrar notifies the couple in router of described current area to delete the recorded information of described mobile node;
Step 6-5), the couple in router of described current area is deleted described recording messages, and is sent acknowledge message.
In the technique scheme, in described step 7), two-way resource reservation tunnel between the couple in router of described couple in router that rebulids current area and Target cell, and in the server of the couple in router of Target cell, realize the register update of mobile node specifically be may further comprise the steps:
Step 7-1), mobile node sends the networking request message to the couple in router of described Target cell; Comprise telephone number in this message, the identification number of current couple in router and traffic stream service mass parameter;
Step 7-2), the couple in router of described Target cell is downloaded the AAA message of described mobile node to the couple in router request of current area;
Step 7-3), the couple in router of current area is replied the AAA message of described mobile node;
Step 7-4), the record of the server deletion mobile node of the couple in router of the couple in router of current area notice current area;
Step 7-5), the server of current area couple in router is deleted the record of described mobile node;
Step 7-6), the couple in router of Target cell is verified the identity of mobile node;
Step 7-7), mobile node is replied certificate message;
Step 7-8), the couple in router of Target cell extracts the QoS parameter in the described networking request message, the couple in router of setting up current area is to the resource reservation tunnel between the couple in router of Target cell;
Step 7-9), set up the couple in router of Target cell to the resource reservation tunnel between the couple in router of current area;
Step 7-10), the couple in router of Target cell upgrades the log-on message of described mobile node at registrar;
Step 7-11) couple in router of current area is deleted the recorded information of described mobile node.
In the technique scheme, in described step 8), described register update to mobile node may further comprise the steps:
Step 8-1), described mobile node sends the request ENT_REQ that networks to the couple in router of Target cell; The telephone number that comprises mobile node in the described networking request, the identification number of the couple in router of current area and QoS parameter;
Step 8-2), the couple in router of Target cell sends AAAINFO_REQ to current couple in router after receiving ENT_REQ;
Step 8-3), the couple in router of current area receives that AAAINFO_REQ replys AAAINFO_REP;
Step 8-4), the record of server deletion mobile node on the couple in router of current area of the couple in router of the couple in router of current area notice current area;
Step 8-5), the server of the couple in router of current area is deleted the relative recording of described mobile node;
Step 8-6), the couple in router of Target cell carries out authentication to mobile node;
Step 8-7), mobile node is replied certificate message;
Step 8-8), the couple in router of Target cell sends the updating message of described mobile node to registrar;
Step 8-9), described registrar upgrades described mobile node;
Step 8-10), the couple in router of registrar notice current area is deleted the record of described mobile node;
Step 8-11), the couple in router of current area is deleted the record of described mobile node.
In the technique scheme, described step 9) specifically may further comprise the steps:
Step 9-1), the PATH message of described mobile node in Correspondent Node transmission RSVP;
Step 9-2), described Correspondent Node is replied the RESV message in the RSVP, and is sent PATH message to described mobile node;
Step 9-3), mobile node is replied RESV message and is given Correspondent Node;
Step 9-4), mobile node carries out routing optimality, sends binding update messages to Correspondent Node;
Step 9-5), after Correspondent Node receives binding update messages, revise the binding chained list, send the Binding Update acknowledge message to mobile node;
Step 9-6), Correspondent Node will mail to mobile node data redirection to optimizing on the path, packet uses the resource reservation path behind the routing optimality to communicate.In the present invention, with link layer, network layer, the application layer switching combines and takes all factors into consideration;
The invention has the advantages that:
1, mobile switch method of the present invention is directly sought the relevant information that comprises Care-of Address according to prediction result in the couple in router of Target cell, compared with prior art need not to know the state information of other neighbor cells, reduced mobile time delay for switching;
2, there is not the problem of duplicate address detection in the Care-of Address of the couple in router of Target cell by state configuration is arranged;
3, mobile switch method of the present invention combines the prediction switching and the application layer signaling of link layer, has reduced the time delay that the application layer Signalling exchange brings;
4, the present invention combines the mobile switching of link layer, network layer and application layer, has reduced time delay for switching, has guaranteed the fail safe of switching, and has improved the service quality of switching.
Description of drawings
Below, describe embodiments of the invention in conjunction with the accompanying drawings in detail, wherein:
Fig. 1 is the schematic diagram of a wireless mobile handoff scenario;
Fig. 2 is the flow chart of the mobile switch method in the radio packet network of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail:
Before method of the present invention is described, at first application scenarios of the present invention is described.Fig. 1 is the schematic diagram of a wireless mobile switching, in the figure, suppose to have two WLAN (wireless local area network), an access point AP1 and a couple in router AR1 are arranged in a WLAN (wireless local area network), an access point AP2 and a couple in router AR2 are arranged in another WLAN (wireless local area network), and two WLAN (wireless local area network) realize data communication by the internet.Suppose that a user carries a mobile node (as mobile phone) at first in first WLAN (wireless local area network), it is online to be connected to wireless local by access point AP1, and carries out data communication by the internet that links to each other with WLAN (wireless local area network) and long-range Correspondent Node; Along with moving of user, the mobile node that the user carries leaves first WLAN (wireless local area network), and enters in the scope of second WLAN (wireless local area network).In this course, finish the mobile switching between WLAN (wireless local area network),, in the present embodiment, as shown in Figure 2, this handoff procedure is elaborated set by step in view of the complexity of mobile handoff procedure:
After step 10, mobile node predict and are about to the incident of switching, the Target Wireless local area network (LAN) that prediction will enter, according to the identification number, IP address and the new Care-of Address (CoA) that predict the outcome to mobile node application target couple in router, and send to the packet of mobile node by current couple in router buffer memory.Being implemented as follows of this step:
The link layer of step 11, mobile node scans and predicts mobile node and is about to the incident of switching, and sends pre-switch indication Pre_HO.indication trigger network layer, has indicated the identification number BS_ID of the target couple in router of prediction in this Indication message; In this step, if the mobile node prediction is about to switch in second WLAN (wireless local area network), then makes eye bright and mark the identification number of couple in router AR2 in the Indication message acceptance of the bid.
After the network layer of step 12, mobile node is received Pre_HO.indication, send to current couple in router after the encapsulation RtSolPr message; In Fig. 2, because current mobile node is in first WLAN (wireless local area network), so its current couple in router is AR1.
After step 13, current couple in router AR1 receive RtSolPr message, send ADDR_REQ message to target couple in router AR2, be the new Care-of Address CoA of mobile node application Target cell by the internet;
After step 14, target couple in router AR2 receive ADDR_REQ message, get in touch with local Dynamic Host Configuration Protocol server, the enabling address layoutprocedure is the new CoA of mobile node configuration;
The new CoA that step 15, target couple in router AR2 will configure sends to current couple in router AR1 by ADDR_RSP message;
After step 16, current couple in router AR1 receive ADDR_RSP message, by PrRtAdv message NCoA is sent to the mobile node that will switch, comprised the BS_ID of target couple in router, the IP address of target couple in router and new CoA address in this message.
Step 17, current couple in router AR1 buffer memory send to the packet of mobile node.In the present embodiment, suppose that the user carries out data communication by internet and long-range Correspondent Node, therefore, current couple in router buffer memory telecommunication opposite end sends to the packet of mobile node.
After step 20, mobile node obtained new CoA address, the application layer of mobile node judged whether mobile node is in on-state, if, finish and predict relevant handover operation, otherwise execution in step 60 is waited for link layer switch indicating information HO.indication.
Owing under non-on-state, the application layer of mobile node does not need to do any operation, and a network layer also handoff protocol that needs execution simply not have to predict gets final product, and therefore, being in non-on-state is not need to predict switching, distribution address.
In this step, the handover operation relevant with prediction comprises the message to target couple in router transmission AAA, and sets up the two-way resource reservation tunnel between target couple in router and current couple in router, is implemented as follows:
The application layer of step 21, mobile node sends handoff predictions message HO_IND to the application layer of target couple in router AR2, comprises information such as the identification number of the telephone number of mobile node, current couple in router and traffic stream service mass parameter in this message; Traffic stream service mass parameter wherein comprise be used for representing delaying time, the parameter of information such as bandwidth, shake, burst length.
After step 22, target couple in router AR2 receive HO_IND, send AAAINFO_REQ to current couple in router AR1, the AAA message of mobile node is downloaded in request; In this step, described AAA message is meant and authenticates, authorizes, charges relevant message.
Step 23, current couple in router AR1 reply AAAINFO_REP after receiving AAAINFO_REQ, and the AAA message of mobile node is informed target couple in router AR2;
Step 24, target couple in router send IDEN_TEST to mobile node and carry out authentication;
Step 25, mobile node are replied IDEN_RES and are confirmed authentication;
Step 26, target couple in router AR2 extract the QOS parameter in the HO_IND message, send PATH message to current couple in router AR1;
Step 27, current couple in router AR1 reply RESV message after receiving PATH message, set up the resource reservation tunnel of target couple in router AR2 to current couple in router AR1;
Step 28, current couple in router AR1 send PATH message to target couple in router AR2;
Step 29, target couple in router AR2 reply RESV message and give current couple in router AR1, set up the resource reservation tunnel of current couple in router AR1 to target couple in router AR2;
Step 210, current couple in router AR1 reply RESV_CON message and give target couple in router AR2, and affirmation resource reservation tunnel is set up and finished;
Step 211, current couple in router AR1 reply HO_IND_COMP and give target couple in router AR2, and the handover operation relevant with prediction finished.
Whether after step 40, mobile node were finished the link layer switching, the trigger network layer switched, and correct in the result of network layer check handoff predictions, if correct, carry out next step, otherwise application was carried out next step after disposing new CoA address more again.In this step, apply for that again the specific implementation step that disposes new CoA address comprises:
After the link layer of step 41, mobile node is finished switching, send one to network layer and switch three layers of switching of indication HO.indication triggering, comprised the identification number BS_ID of the couple in router of the WLAN (wireless local area network) that will switch in this Indication message;
After the network layer of step 42, mobile node is received and is switched indication, whether the identification number of checking resulting target couple in router in identification number and the aforementioned forecasting process of couple in router of the WLAN (wireless local area network) that will switch to is consistent, if it is consistent, expression is predicted successfully, enter step 50, otherwise prediction of failure is carried out next step;
In aforementioned process, mention, in the present embodiment, the WLAN (wireless local area network) that user's mobile node prediction enters couple in router AR2 place, when the user in actual moving process, when having entered this WLAN (wireless local area network) really, expression is predicted successfully, if entered other WLAN (wireless local area network), then represents prediction of failure.
Step 43, mobile node send ADDR_REQ message to the target couple in router, apply for new CoA address;
After step 44, target couple in router are received ADDR_REQ message, get in touch with local Dynamic Host Configuration Protocol server, the enabling address layoutprocedure is the new CoA address of mobile node configuration;
The new CoA address that step 45, target couple in router will prepare sends to mobile node by ADDR_RSP message.
Binding between step 50, mobile node realization and current couple in router is set up the two-way interim tunnel between current couple in router and mobile node, and by two-way interim tunnel data in buffer is mail to mobile node.Being implemented as follows of this step:
Step 51, mobile node send the neighbor advertisement message FNA that comprises binding update messages BU to the target couple in router;
Step 52, target couple in router AR2 take out the binding update messages in the neighbor advertisement message, replace mobile node to send to current couple in router AR1, have comprised the new and old CoA address of mobile node in this message;
After step 53, current couple in router AR1 receive binding update messages, send the success of Binding Update acknowledge message BU Ack notice mobile node Binding Update to mobile node;
Step 54, current couple in router are set up the two-way interim tunnel of current couple in router to mobile node;
Step 55, current couple in router mail to mobile node by two-way interim tunnel with cached data packet.
After the application layer of step 60, mobile node is received switch indicating information HO.indication, judge whether mobile node is predicted accurately, and judge whether mobile node is in on-state, if prediction accurately and be in on-state, then carry out register update in the target couple in router, execution in step 90 then; If forecasting inaccuracy is true and be in on-state, then jump to step 70; If mobile node is in non-on-state then jumps to step 80;
Because in communication process, the generation of communication can happen suddenly, and exist the regular hour poor between the moment that the generation that prediction the is switched moment and real switching take place, therefore, though in step 20, whether mobile node is in on-state judge also will whether be in on-state in this step and judge to mobile node.In addition, in step 40, whether correctly judge predicting the outcome in the network layer of mobile node, and in this step, then be whether correctly to judge predicting the outcome in the application layer of mobile node.Network layer is responsible for mobile IP switching, and application layer is responsible for call proceeding, and both are separate to the deterministic process that predicts the outcome.
In this step, the operation of carrying out register update in the target couple in router specifically comprises:
Step 61, mobile node are at the message HO_IND_COMP that receives that expression and prediction associative operation finish, and after receiving link layer switching indication, send the request indication ENTRY_IND that networks to the target couple in router, notification target couple in router mobile node has entered new WLAN (wireless local area network);
Step 62, target couple in router send REGISTER message to registrar, and mobile node is carried out register update;
Step 63, registrar are replied REGIS_CONF and are confirmed;
Step 64, registrar send REGISTER_DEL message to current couple in router, notify the recorded information of current couple in router deletion mobile node;
Step 65, current couple in router are replied REGIS_DEL_CONF message and are confirmed.
Step 71, mobile node send networking request message ENT_REQ to the target couple in router; Comprise telephone number in this message, the BS_ID of current couple in router and QOS parameter;
Step 72, target couple in router send the AAAINFO_REQ message that is used to ask to download AAA message to current couple in router after receiving ENT_REQ;
Step 73, current couple in router are replied AAAINFO_REP after receiving AAAINFO_REQ message;
Step 74, current couple in router send the record that message AAAINFO_DEL notifies the server deletion mobile node of current couple in router;
The server of step 75, current couple in router is replied AAAINFO_DEL_CONF and is confirmed;
Step 76, target couple in router send IDEN_TEST message the mobile node identity are verified;
Step 77, mobile node are replied IDEN_RES and are replied;
Step 78, authentication are passed through, and then the target couple in router sends PATH message to current couple in router according to the QOS parameter in the ENT_REQ message;
Step 79, current couple in router are replied RESV message and are given the target couple in router; And send PATH message to the target couple in router;
Step 710, target couple in router are replied RESV message and are given current couple in router;
Step 711, current couple in router are replied RESV_CON and are confirmed that the two-way resource reservation tunnel between current couple in router and target couple in router sets up successfully;
Need to prove that the two-way resource reservation tunnel of being set up is in this step expanded agreement by RSVP and finished, and in aforesaid step 54, the two-way interim tunnel of being set up then is an IP tunnel, both are different.
Step 712, target couple in router are to registrar sending node updating message REGISTER;
Step 713, registrar are replied REGIS_CONF and are confirmed;
Step 714, registrar send REGISTER_DEL message to current couple in router, notify current couple in router deletion of node record;
Step 715, current couple in router are replied REGIS_DEL_CONF message and are confirmed that execution in step 90 then.
Step 81, mobile node send the request ENT_REQ that networks to the target couple in router; This message comprises telephone number, the BS_ID of PAR and QOS parameter;
Step 82, target couple in router send the AAAINFO_REQ message that is used to ask to download mobile node AAA message to current couple in router after receiving ENT_REQ;
Step 83, current couple in router receive that AAAINFO_REQ replys AAAINFO_REP;
Step 84, current couple in router transmission message AAAINFO_DEL notify the server of current couple in router to delete mobile node record about AAA message on current couple in router;
The server of step 85, current couple in router is replied AAAINFO_DEL_CONF and is confirmed;
Step 86, target couple in router send IDEN_TEST message the mobile node identity are verified;
Step 87, mobile node are replied IDEN_RES and are replied;
Step 88, target couple in router are to registrar sending node updating message REGISTER;
Step 89, registrar are replied REGIS_CONF and are confirmed;
Step 810, registrar send REGISTER_DEL message to current couple in router, notify the registration of current couple in router deletion mobile node;
Step 811, current couple in router are replied REGIS_DEL_CONF message and are confirmed, then end operation.
Step 91, mobile node send PATH message to Correspondent Node CN;
Step 92, Correspondent Node are replied RESV message, and send PATH message;
Step 93, mobile node are replied RESV message and are given Correspondent Node;
Step 94, mobile node carry out routing optimality, send binding update messages BU to Correspondent Node;
After step 95, Correspondent Node are received BU, revise the binding chained list, send Binding Update acknowledge message BU Ack to mobile node;
Step 96, Correspondent Node will mail to the data redirection of mobile node to optimizing on the path, and packet uses the resource reservation path behind the routing optimality to communicate.
It should be noted last that above embodiment is only unrestricted in order to technical scheme of the present invention to be described.Although the present invention is had been described in detail with reference to embodiment, those of ordinary skill in the art is to be understood that, technical scheme of the present invention is made amendment or is equal to replacement, do not break away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (11)
1, the mobile switch method in a kind of radio packet network may further comprise the steps:
After step 1), mobile node predict and are about to the incident of switching, the Target cell that prediction will enter, according to the identification number, IP address and the new Care-of Address that predict the outcome to mobile node application Target cell couple in router, and send to the packet of mobile node by the couple in router buffer memory of current area;
Step 2), after mobile node obtains new Care-of Address, the application layer of mobile node judges whether mobile node is in on-state, if, then finish and predict relevant handover operation, comprise the two-way resource reservation tunnel between the AAA message of downloading mobile node and the couple in router of setting up current area and the Target cell couple in router, otherwise, wait for the link layer switch indicating information, execution in step 6);
Step 3), mobile node carry out the switching of link layer;
Whether after step 4), mobile node were finished the link layer switching, the trigger network layer switched, and correct in the result of network layer check handoff predictions, if correct, carry out next step, otherwise application was carried out next step after disposing new Care-of Address more again;
Binding between step 5), mobile node realization and current area couple in router is set up the couple in router of current area and the two-way interim tunnel between mobile node, and by two-way interim tunnel institute's cached data packet in the step 1) is mail to mobile node;
After the application layer of step 6), mobile node is received switch indicating information, judge in application layer whether mobile node is predicted accurately, and judge whether mobile node is in on-state, if prediction accurately and be in on-state, then carry out register update in the couple in router of Target cell, execution in step 9 then); If forecasting inaccuracy is true and be in on-state, then jump to step 7); If mobile node is in non-on-state then jumps to step 8);
Step 7), be in on-state when mobile node, but when early stage, forecasting inaccuracy was true, rebulid the interim tunnel of two-way resource between the couple in router of the couple in router of current area and Target cell, and in the server of the couple in router of Target cell, realize register update to mobile node, execution in step 9 then);
Step 8), mobile node are in non-on-state, then end operation after realizing the register update of mobile node on the server of the couple in router of Target cell;
Step 9), mobile node carry out the routing optimality operation, behind routing optimality, the data that send to mobile node are transmitted by optimized path.
2, the mobile switch method in the radio packet network according to claim 1 is characterized in that, described step 1) specifically comprises following performing step:
Step 1-1), the link layer of mobile node scanning and predicting after mobile node is about to the incident of switching, send the pre-switch indication with the trigger network layer; In described pre-switch indication, indicated the identification number of the couple in router of target of prediction sub-district;
Step 1-2), after the network layer of mobile node receives the pre-switch indication, the couple in router of notice sub-district, the current place of mobile node;
Step 1-3), the couple in router of current area sends message to the couple in router of described target of prediction sub-district, is the new Care-of Address of the described Target cell of mobile node application;
Step 1-4), the couple in router enabling address layoutprocedure of described target of prediction sub-district, be the new Care-of Address of described mobile node configuration;
Step 1-5), the couple in router of the described target of prediction sub-district new Care-of Address that will configure sends to the couple in router of current area;
Step 1-6), the couple in router of current area sends to described mobile node with identification number, IP address and the new Care-of Address of the couple in router of described target of prediction sub-district;
Step 1-7), the couple in router buffer memory of current area sends to the packet of mobile node.
3, the mobile switch method in the radio packet network according to claim 1 is characterized in that, in described step 2) in, the described handover operation relevant with prediction is meant:
Step 2-1), the application layer of mobile node sends handoff predictions message to the application layer of the couple in router of described target of prediction sub-district; Described handoff predictions message comprises the identification number and the traffic stream service mass parameter of the telephone number of mobile node, current couple in router;
Step 2-2), the couple in router of described target of prediction sub-district is downloaded the AAA message of mobile node to the couple in router request of current area;
Step 2-3), the couple in router of described current area sends to the AAA message of mobile node the couple in router of described target of prediction sub-district;
Step 2-4), the couple in router of described target of prediction sub-district sends authentication message to described mobile node;
Step 2-5), mobile node answer certificate message is carried out authentication;
Step 2-6), the couple in router of described target of prediction sub-district extracts the QoS parameter in the handoff predictions message, is established to the resource reservation tunnel of current area couple in router;
Step 2-7), set up the resource reservation tunnel of current area couple in router to target of prediction sub-district couple in router;
Step 2-8), relevant with prediction handover operation is finished.
4, the mobile switch method in the radio packet network according to claim 3, it is characterized in that, when setting up described resource reservation tunnel, at first send PATH message in the RSVP to the target couple in router by current couple in router, reply RESV message in the RSVP by the target couple in router then, thereby set up two resource reservation tunnels between the router.
5, the mobile switch method in the radio packet network according to claim 1 is characterized in that, in described step 4), specifically may further comprise the steps:
Step 4-1), after the link layer of mobile node finishes switching, send one to network layer and switch indication and switch, comprised the identification number of the couple in router of the Target cell that will switch in this Indication message with the trigger network layer;
Step 4-2), after the network layer of mobile node is received and is switched indication, whether the identification number of checking the Target cell couple in router that will switch to is consistent with the identification number of described target of prediction sub-district couple in router, if it is consistent, expression is predicted successfully, execution in step 5), otherwise prediction of failure is carried out next step;
Step 4-3), mobile node is to the new Care-of Address of the couple in router application of described Target cell;
Step 4-4), the couple in router enabling address layoutprocedure of described Target cell, be the new Care-of Address of mobile node configuration;
Step 4-5), the couple in router of the described Target cell new Care-of Address that will prepare sends to mobile node.
6, the mobile switch method in the radio packet network according to claim 1 is characterized in that, describedly sets up two-way interim tunnel and may further comprise the steps:
Step 5-1), mobile node sends the neighbor advertisement message that comprises binding update messages to the couple in router of Target cell;
Step 5-2), the couple in router of Target cell takes out the binding update messages in the neighbor advertisement message, and sends to the couple in router of current area, comprised the new and old Care-of Address of mobile node in the described binding update messages;
Step 5-3), after the couple in router of current area receives binding update messages, the success of notice mobile node Binding Update;
Step 5-4), the couple in router of current area is set up the two-way interim tunnel of the couple in router of current area to mobile node;
Step 5-5), the couple in router of current area mails to mobile node by two-way interim tunnel with cached data packet.
7, the mobile switch method in the radio packet network according to claim 1 is characterized in that, in described step 6), described register update operation specifically may further comprise the steps:
Step 6-1) mobile node with the relevant EO of prediction, and receive after link layer switches indication, send the request of networking to the couple in router of Target cell and indicate, the couple in router mobile node of notification target sub-district has entered new sub-district;
Step 6-2), the couple in router of Target cell sends message to registrar, to realize the register update to described mobile node;
Step 6-3), after registrar finishes register update, send acknowledge message;
Step 6-4), registrar notifies the couple in router of described current area to delete the recorded information of described mobile node;
Step 6-5), the couple in router of described current area is deleted described recording messages, and is sent acknowledge message.
8, the mobile switch method in the radio packet network according to claim 1, it is characterized in that, in described step 7), two-way resource reservation tunnel between the couple in router of described couple in router that rebulids current area and Target cell, and in the server of the couple in router of Target cell, realize the register update of mobile node specifically be may further comprise the steps:
Step 7-1), mobile node sends the networking request message to the couple in router of described Target cell; Comprise telephone number in this message, the identification number of current couple in router and traffic stream service mass parameter;
Step 7-2), the couple in router of described Target cell is downloaded the AAA message of described mobile node to the couple in router request of current area;
Step 7-3), the couple in router of current area is replied the AAA message of described mobile node;
Step 7-4), the record of the server deletion mobile node of the couple in router of the couple in router of current area notice current area;
Step 7-5), the server of current area couple in router is deleted the record of described mobile node;
Step 7-6), the couple in router of Target cell is verified the identity of mobile node;
Step 7-7), mobile node is replied certificate message;
Step 7-8), the couple in router of Target cell extracts the QoS parameter in the described networking request message, the couple in router of setting up current area is to the resource reservation tunnel between the couple in router of Target cell;
Step 7-9), set up the couple in router of Target cell to the resource reservation tunnel between the couple in router of current area;
Step 7-10), the couple in router of Target cell upgrades the log-on message of described mobile node at registrar;
Step 7-11) couple in router of current area is deleted the recorded information of described mobile node.
9, the mobile switch method in the radio packet network according to claim 8, it is characterized in that, when setting up described resource reservation tunnel, at first send PATH message in the RSVP to the couple in router of setting up the reciever place by the couple in router of setting up the initiator place, reply RESV message in the RSVP by the couple in router of setting up the reciever place then, thereby set up two resource reservation tunnels between the router.
10, the mobile switch method in the radio packet network according to claim 1 is characterized in that, in described step 8), described register update to mobile node may further comprise the steps:
Step 8-1), described mobile node sends the request ENT_REQ that networks to the couple in router of Target cell; The telephone number that comprises mobile node in the described networking request, the identification number of the couple in router of current area and QoS parameter;
Step 8-2), the couple in router of Target cell sends AAAINFO_REQ to current couple in router after receiving ENT_REQ;
Step 8-3), the couple in router of current area receives that AAAINFO_REQ replys AAAINFO_REP;
Step 8-4), the record of server deletion mobile node on the couple in router of current area of the couple in router of the couple in router of current area notice current area;
Step 8-5), the server of the couple in router of current area is deleted the relative recording of described mobile node;
Step 8-6), the couple in router of Target cell carries out authentication to mobile node;
Step 8-7), mobile node is replied certificate message;
Step 8-8), the couple in router of Target cell sends the updating message of described mobile node to registrar;
Step 8-9), described registrar upgrades described mobile node;
Step 8-10), the couple in router of registrar notice current area is deleted the record of described mobile node;
Step 8-11), the couple in router of current area is deleted the record of described mobile node.
11, the mobile switch method in the radio packet network according to claim 1 is characterized in that, described step 9) specifically may further comprise the steps:
Step 9-1), the PATH message of described mobile node in Correspondent Node transmission RSVP;
Step 9-2), described Correspondent Node is replied the RESV message in the RSVP, and is sent PATH message to described mobile node;
Step 9-3), mobile node is replied RESV message and is given Correspondent Node;
Step 9-4), mobile node carries out routing optimality, sends binding update messages to Correspondent Node;
Step 9-5), after Correspondent Node receives binding update messages, revise the binding chained list, send the Binding Update acknowledge message to mobile node;
Step 9-6), Correspondent Node will mail to mobile node data redirection to optimizing on the path, packet uses the resource reservation path behind the routing optimality to communicate.
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| JP5062845B2 (en) * | 2008-06-30 | 2012-10-31 | 日本電信電話株式会社 | Route switching method, server device, boundary node device, route switching system, and route switching program |
| JP4539768B2 (en) * | 2008-08-22 | 2010-09-08 | ミツミ電機株式会社 | Mobile station, handover method thereof, and communication system |
| CN101841835B (en) * | 2009-03-17 | 2012-12-19 | 电信科学技术研究院 | Switching optimization method, equipment and system |
| CN103841610B (en) * | 2014-03-18 | 2017-02-15 | 山东大学 | Quick and efficient agent mobile IPv6 switching method |
| WO2015142376A1 (en) * | 2014-03-19 | 2015-09-24 | Eden Rock Communications Llc | Method and system for path predictive congestion avoidance |
| CN105592415B (en) * | 2015-11-04 | 2019-06-07 | 宁波大学 | Low consumption FMIPv6 switching method based on moving projection |
| CN109995840A (en) * | 2018-01-02 | 2019-07-09 | 中国移动通信有限公司研究院 | CDN method of data synchronization, device, equipment and computer storage medium |
| CN113364696B (en) * | 2021-08-10 | 2021-10-01 | 江苏泽宇智能电力股份有限公司 | Distributed routing module based on communication security |
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