| With the development of internet tecknoledge,IPV6 has stepped into theapplication of daily life from the lab. With the further application, peopleexpect more about it, they don not be satisfied with the single transmissionmodel that all dataflow are treated as the same. It has become a focus thatpeople concern that how to supply different services of dataflow transmission.With the development of wireless communication and the popularize ofmoveable equipment, the study of quality of service under the condition ofmoveable IPV6 is getting more and more attentions.To meet different needs of dataflow, scientists come up with a model ofintegrated service in fixed internet. This model can meet the transmissionrequest that dataflow needs by pre-reserving resource in the path oftransmission for each dataflow.But this model does not fit for mobile condition. because in mobileinternet a QOS path needs to be rebuilt when node moves to a new place。Thequality of QOS will get worse, the worst is that there will be no resourceavailable when mobile node moves to a new place and causes limitlessintermit of QOS.To solve this problem, people come up with the project of MRSVP, thebasic idea of the project is to pre-reserve resource on the road where mobilenode may pass to let mobile node has resource available when it reaches a newplace. Through this way ,the limitless intermit can be avoided. However, thisproject still has the following problems1,The former MRSVP project add an Sender Anchor and a ReceiverAnchor in order to solve the problem that MIPV4 does not have the functionto register in correspondent node and mask the movement of two sides ofcommunication. Because of the exist of Sender Anchor and Receicer Anchor,the path is forced to pass these two nodes and make it not the best path fordataflow . Furthermore,because of the exist of Sender Anchor, dataflow isforced to divide into two parts :F1, f2, Sender Anchor must switch informationand dataflow between F1 and F2.2,When MNR needs to register in correspondent node, it must start asit reaches a new place, after established binding relation in correspondentnode , it can receive and send dataflow directly with the adversary. Therefore,this way cannot eliminate the interim intermit of QOS due to binding process 3,If Receiver Anchor is the home agent of mobile receiver, then thereceiving side cannot register in correspondent node, which conflicts with thesystem that MIPV6 provides. When it is used in MIPV6, it cannot make fulluse of convenience of MIPV6. The project does not consider how tocollaborate MRSVP with binding process and MIPV6 agreement. It does notfurther consider how to realize those expanding news. In order to solve the three problems, this essay proposes a solution asfollowing on base of the basic ideas of MRSVP: 1,Cancel the former concepts of Sender Anchor and Receiver Anchorin MRSVP, supply resource in advance on the best path . 2,Let an agent take place of mobile node to complete ahead of time theprocess of RRP and to establish binding relation in advance on related nodes. 3,To realize the basic ideas of MRSVP, let mobile node, its agent andcorrespondent node that supports movement undertake all duties of realizingthe function of MRSVP, this solution is transparent to router , the RSVPprinciples of do not need to be revised on all routers. 4,Let MRSVP and MIPV6 unite together effectively, add MRSVPfunction in present MIPV6 condition. The following example can explain the working process of the solutionwhen both sides of communication are mobile node. 1,MNS starts RRP process and establishes the binding on MNRbefore it sends QOS dataflow to it and tell MNR the probable position it willreach by sending SENDER-MSPEC message. 2,MNS informs remote sending agent to start RRP process in place ofitself and establishes pre-binding on MNR. 53,MNR knows the sender is sending QOS dataflow after receiving itsHOTI, then starts it own's RRP and establishes the binding on sending point. Itsends RECEIVER-MSPEC to sender of dataflow and tell the adversary theposition it may reach. If it receives the message of SENDER-MSPEC, it t theremote sending agent to start RRP process and establish the binding on theremote sending agent .it tell remote receiving agent to establish the binding onthe remote sending agent and MNS. 4,MNS establishes the bind on the remote receiving agent after itreceives RECEIVER-MSPEC message and informs the remote sending agentto establish the pre-binding on the remote receiving agent. 5,After the above four steps, MNS and its remote sending agent sendPATH message to MNR and all the remote receiving agent and receive RESVmessage sent by MNR and the remote receiving agent . 6,MNS sends QOS dataflow to the present position of MNR, when itmoves to a new position, it send dataflow with new care_of address as sourceaddress, If MNR receives dataflow coming from pre-binding, it proves thatMNS has moved to a new position and MNR will by itself alter the main careof address in binding cache into a new one. 7,When MNR moves to a new position, it sends a binding updatemessage BU1. If MNS receives BU1, it proves that MNR has moved to a newposition, it then alters related items in binding cache and sends dataflow toMNR with new care _of address as destination address. 8,During the above process, mobile node needs to send some informationto its agent to pass the parameters that the agent in place of mobile node needswhen it sends all kinds of information, and the agent also needs to sendmessage to mobile node to report some information on binding and resourcereservation. 9 ,When MNS finds the new probable position, it sendsSENDER-MSPEC message to MNR, let MNR and its agent as well as thenewly found sending agent establish binding relation and pre-reservation path;When MNS finds certain probable position that needs to be canceled, it also... |
