CN101610243B - Method, system and mobile node for establishing service quality resource reservation signaling flow - Google Patents
Method, system and mobile node for establishing service quality resource reservation signaling flow Download PDFInfo
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Abstract
The invention discloses a method, a system and a mobile node for establishing a service quality resource reservation signaling flow, and belongs to the field of communication. The method comprises the following steps: when the mobile node MN is moved to a foreign network, initiating the signaling flow of GIST, and establishing a GIST state on a communication path of the MN and a communication opposite end node CN; and initiating the signaling flow of QoS NSLP by the MN, and establishing a QoS NSLP state on the communication path of the MN and the CN. The mobile node comprises a first state establishing module and a second state establishing module. The system comprises the mobile node, an intermediate node and the communication opposite end node. After the MN is moved to the foreign network, the establishment of the signaling flow for QoS resource reservation on the new communication path is actively initiated, and an NSIS is made to respond a mobile event of an IP layer as early as possible, so that the time for establishing the QoS resource reservation is shortened.
Description
Technical field
The present invention relates to the communications field, particularly set up method, system and the mobile node of service quality resource reservation signaling flow.
Background technology
Mobile IP v 6 (MIPv6; Mobile IPv6) techniques make use IPv6 agreement is to the ambulant inherent mobile node (MN that supports to make; Mobile Node) when mobile; Can keep being communicated with through a fixed IP addresses and other nodes, this fixed IP addresses be commonly referred to home address (HoA, Home Address).Because the transmission of packet is that destination address according to network layer comes routing in the Internet; So adopt Care-of Address (CoA in the mobile IP v 6; Care of Address) the expression mobile node makes that in reached at the IP address of the current network segment communication can reach under existing route pattern.The mapping of HoA and CoA makes employed network layer sign of upper layer application and the employed purpose sign of network layer route set up corresponding relationship.
As shown in Figure 1, be mobile IP v 6 networking structure sketch map in the prior art.The basic operation of mobile IP v 6 is following: each MN all has a HoA, and regardless of this MN particular location, its corresponding HoA does not change, and the HoA unique identification this MN.No matter MN is at home network or at field network, and MN is addressed through HoA.As MN during, can use common routing mechanism that the packet that mails to MN is carried out route at home network.Because the subnet prefix of MN is identical with the subnet prefix of MN home link, will be routed to its home link so mail to the packet of MN.When MN leaves home network, utilize the IPv6 Neighbor Discovery Protocol, MN can through state arranged or the automatic configuration mechanism in stateless address or additive method (for example, the network manager by foreign link distributes an IP address to give MN in advance) obtain CoA.To carry out duplicate address detection (DAD, Duplicated Address Detection) behind the acquisition CoA and guarantee that this CoA is unique.After this, with obtaining the related of a HoA and CoA, be referred to as to bind.A CoA of the router registration oneself of MN on home link, and with the home agent (HA, Home Agent) of this router as oneself.When registering, MN sends binding update messages (BU, Binding Update) to HA; HA sends binding acknowledgement message (BA, Binding Acknowledge) as response to MN then.When correspondent node (CN, Correspondent Node) will be sent packet to MN, if it is to communicate by letter with MN for the first time; During the CoA of unknown MN; Then the HoA with MN comes addressing as destination address, and this packet will be intercepted and captured by HA, and HA utilizes the IPv6 tunneling to encapsulate this packet; The destination address in the outside packet header of IPv6 encapsulation is the Care-of Address of MN, sends the Care-of Address of MN then to through the tunnel.MN can know it and not bind with this CN, just initiate a return path and can reach process when receiving from the packet that the tunnel transmits.Return path can reach the process main purpose and be to guarantee that communication node receives the authenticity and the reliability of Binding Update.After this process success, MN then sends BU to CN.After this, CN can directly utilize the CoA of MN to communicate by letter with it, and packet will be routed directly to the MN on this foreign link, and this process is a route optimization process.
Service quality (QoS, Quality of Service) refers to the comprehensive description of the various performance yardsticks of network system, mainly comprises available bandwidth, packet loss, error rate, time delay and aspects such as shake, call completing rate.Signaling (NSIS of future generation; Next Steps in Signaling) is based on the qos signaling agreement of IP; It is divided into signaling protocol two-layer: signaling application layer protocol (NSLP; NSIS Signaling Layer Protocol) and signaling transport layer protocol (NTLP, NSIS Transport Layer Protocol), its protocol architecture is as shown in Figure 2.NSLP is used to carry out specific signaling application function, and for example QoS, intermediate equipment are passed through etc.A NSLP can only use corresponding to a specific signaling, and the NSLP signaling message transmits through NTLP.NSLP can support the QoS resource reservation.NTLP is primarily aimed at the different signaling application flow in upper strata unified signaling message transmission service is provided.At the NTLP layer; The transmission of signaling message and safety assurance are prolonged with already present transmission and security protocol to be provided; For example transmission control protocol (TCP, Transmission Control Protocol), UDP (UDP, User Datagram Protocol), SCTP (SCTP; Stream Control Transmission Protocol) and packet congestion control protocol (DCCP, Datagram Congestion Control Protocol).In the protocol frame of NTLP, designed a universal network signaling transfer protocol (GIST, General Internet Signaling Transport Protocol).Under GIST, prolong with already present transmission and security protocol.GIST itself is not transmission or Routing Protocol, and it is mainly used in message routing state and message relating state between the management NSIS peer-entities.Wherein, message routing state and message relating state are two types of important states storing on the NSIS node, and all basic messaes on the NSIS node are handled (for example, message transmission, local processing, message sink etc.) all based on these two types of states.The basic messae type of GIST comprises: the GIST inquiry (GIST-Query) relevant with three-way handshake (Hand Shaking), GIST response (GIST-Response), GIST confirm (GIST-Confirm); And the GIST-Data message of transmission NSLP data etc.Its basic message signaling process is the process of three-way handshake: query node sends GIST-Query and gives responsive node, and responsive node is received back response GIST-Response message, returns a GIST-Confirm message after query node is received again.After the GIST of NTLP layer state is set up well, then on the path of having set up the GIST state, set up QoS NSLP state, do actual resource reservation.QoS NSLP sets up and preservation state information along data flow path, for data flow provides corresponding resource reservation.QoS NSLP signaling message is initiated at the end points of stream, along the data path transmission, and on the NSIS entity node on the data path, realizes corresponding resource reservation, and this signaling ends at the end points of data flow or the agent node of NSIS.The type of message of QoS NSLP comprises: reserve (RESERVE), inquiry (QUERY), response (RESPONSE) etc.
Fig. 3 is prior art CN NSIS topological diagram in typical mobile IP v 6 network during as data sending terminal.As shown in Figure 3, in the mobile IP v 6 network, CN is as data sending terminal, and (MN that will move to field network among the figure is designated MN ' to show difference) obtains this field network and distribute to its CoA after MN moves to field network; MN ' sends BU message to HA then, to the CoA of HA registration MN '.Like this, the packet that CN issues MN ' is intercepted and captured by HA and is handed to MN ', and this process is called the triangle routing procedure.In the prior art, also need be through after two steps, CN could initiate to set up the signaling process (being the signaling process of QoS resource) of NSIS state on new communication path, and then accomplishes actual QoS resource reservation.These two steps are: MN ' receives the packet that CN sends over from the triangle route; CN receives the BU that MN ' sends over, and returns BA to MN ', accomplishes the message flow of mobile IP v 6 Binding Update.Inventor of the present invention finds that these two steps have delayed the response of NSIS to the IP layer moving event of node, and then have prolonged NSIS sets up the QoS resource reservation on new communication path time, the degradation of the QoS that causes communicating by letter.Fig. 4 is prior art MN NSIS topological diagram in typical mobile IP v 6 network during as data sending terminal.As shown in Figure 4, in the mobile IP v 6 network, as data sending terminal, (MN that will move to field network among the figure is designated MN ' to show difference) obtains this field network and distributes to its CoA after MN moves to field network as if MN; MN ' continues to send packet to CN, and the packet that MN ' issues CN is intercepted and captured by HA and handed to CN, and this process is the triangle routing procedure.In the prior art, after CN received first packet that MN ' sends over from the triangle route, CN could initiate the signaling process of new QoS resource reservation on new communication path.This has just delayed the response of NSIS to IP layer moving event, thereby has prolonged NSIS sets up the QoS resource reservation on new communication path time, the degradation of the QoS that causes communicating by letter.
Inventor of the present invention finds that in the above-mentioned mobile IP v 6 network, there is following problem at least in the technical scheme that NSIS sets up the QoS resource reservation:
(1) as can be seen from Figure 3, when CN made a start as data, in the mobile IP v 6 network, it was MN ' that MN moves to the field network postscript, and CN need wait for that MN ' receives the packet that CN sends over from the triangle route; CN receives the BU that MN ' sends over, and returns BA to MN ', accomplishes after the message flow of mobile IP v 6 Binding Update, and CN could initiate the QoS resource reservation signaling flow on new communication path.The process of these two waits has delayed time of on the new communication path of CN and MN, setting up the QoS resource reservation.
(2) as can be seen from Figure 4; When MN makes a start as data; In the mobile IP v 6 network; It is MN ' that MN moves to the field network postscript, and CN need wait for that MN ' could do resource reservation work at the signaling process of new communication path initiation QoS resource reservation again after the packet that the triangle route sends over.The process of this wait has delayed time of on the new communication path of CN and MN, setting up the QoS resource reservation.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of method, equipment and system of the QoS of foundation resource reservation signaling flow, sets up the time delay of QoS resource reservation with shortening.Said technical scheme is following:
A kind of method of setting up service quality resource reservation signaling flow comprises:
When mobile node moves to field network; After obtaining Care-of Address; Initiatively initiate the signaling process of universal network signaling transfer protocol, the signaling process of said universal network signaling transfer protocol is used on the communication path of said mobile node and correspondent node, setting up said universal network signaling transfer protocol state;
Said mobile node is the signaling process of initiating QoS signaling application layer protocol initiatively, and the signaling process of said service quality signal application layer protocol is used on the communication path of said mobile node and said correspondent node, setting up said service quality signal application layer protocol state.
A kind of mobile node comprises:
First state is set up module; When being used for said mobile node and moving to field network; After obtaining Care-of Address; Initiatively initiate the signaling process of universal network signaling transfer protocol, the signaling process of said universal network signaling transfer protocol is used on the communication path of said mobile node and correspondent node, setting up said universal network signaling transfer protocol state;
Second state is set up module; Be used for the initiatively signaling process of initiating QoS signaling application layer protocol, the signaling process of said service quality signal application layer protocol is used on the communication path of said mobile node and said correspondent node, setting up said service quality signal application layer protocol state.
A kind of system that sets up service quality resource reservation signaling flow comprises:
Mobile node; Be used for when said mobile node moves to field network; After obtaining Care-of Address; Initiatively initiate the signaling process of universal network signaling transfer protocol, the signaling process of said universal network signaling transfer protocol is used on the communication path of said mobile node and correspondent node, setting up said universal network signaling transfer protocol state; And the signaling process of active initiating QoS signaling application layer protocol, the signaling process of said service quality signal application layer protocol is used on the communication path of said mobile node and said correspondent node, setting up said service quality signal application layer protocol state;
Intermediate node is used to respond the signaling process of the said universal network signaling transfer protocol that said mobile node initiates, and on the communication path of said mobile node and correspondent node, sets up said universal network signaling transfer protocol state;
And respond the signaling process of the said service quality signal application layer protocol of said mobile node initiation, on the communication path of said mobile node and said correspondent node, set up said service quality signal application layer protocol state;
Correspondent node is used to respond the signaling process of the said universal network signaling transfer protocol that said mobile node initiates, and on the communication path of said mobile node and correspondent node, sets up said universal network signaling transfer protocol state;
And respond the signaling process of the said service quality signal application layer protocol of said mobile node initiation, on the communication path of said mobile node and said correspondent node, set up said service quality signal application layer protocol state.
The beneficial effect of the technical scheme that the embodiment of the invention provides is:
Compare than prior art; The method of setting up the QoS resource reservation signaling flow, system and mobile node that the embodiment of the invention provides; Move to after field network obtains CoA through MN, initiatively initiate the signaling process that NSIS lower floor is the GIST layer, set up the GIST state; If CN continues to communicate by letter with MN; Then on the path of having set up the GIST state, set up QoS NSLP state; Setting up the resource reservation of doing reality under the good NSIS state afterwards; Thereby make NSIS respond to the IP layer moving event of node as early as possible, shortened the time of setting up the QoS resource reservation.
Description of drawings
Fig. 1 is the networking structure sketch map of the mobile IP v 6 that provides in the prior art;
Fig. 2 is the NSIS protocol architecture sketch map that provides in the prior art;
Fig. 3 is the topological diagram of NSIS in typical mobile IP v 6 network when CN is as data sending terminal in the prior art;
Fig. 4 is the topological diagram of NSIS in typical mobile IP v 6 network when MN is as data sending terminal in the prior art;
Fig. 5 is the method flow diagram of setting up the QoS resource reservation signaling flow that the embodiment of the invention provides;
Fig. 6 is the method flow diagram of setting up the QoS resource reservation signaling flow that the embodiment of the invention 1 provides;
Fig. 7 is the MN that provides of the embodiment of the invention 1 is initiated to set up the QoS resource reservation during as data receiver by MN a signaling process sketch map;
Fig. 8 is the method flow diagram of setting up the QoS resource reservation signaling flow that the embodiment of the invention 2 provides;
Fig. 9 is the MN that provides of the embodiment of the invention 2 is initiated to set up the QoS resource reservation during as data sending terminal by MN a signaling process sketch map;
Figure 10 is the structural representation of the mobile node that provides of the embodiment of the invention 3;
Figure 11 is the system schematic of setting up the QoS resource reservation signaling flow that the embodiment of the invention 4 provides.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, will combine accompanying drawing that embodiment of the present invention is done to describe in detail further below.
In the embodiment of the invention, MN moves to field network, obtain CoA after, initiatively initiate the signaling process of NSIS lower floor (being the GIST layer), set up the GIST state; If CN continues to communicate by letter with MN, then on the path of having set up the GIST state, set up QoS NSLP state, do actual resource reservation.
In view of MN is a communication node of knowing IP layer moving event the earliest, and MN also can be through the message routing state of inquiry self, the message relating state, and session sign methods such as (SID, Session Identifier) knows oneself with which peer node is communicated by letter.Be compared to existing by CN initiation NSIS signaling process; In the embodiment of the invention, after MN moved to field network, no matter MN was as data receiver or data sending terminal; All change from passive to active, initiate on new communication path, to set up the signaling process of QoS resource reservation.
Referring to Fig. 5, Fig. 5 is the method flow diagram of setting up the QoS resource reservation signaling flow that the embodiment of the invention provides, and this flow process can may further comprise the steps:
When step 51:MN moves to field network, initiate the signaling process of GIST, on the communication path of MN and CN, set up the GIST state jointly with CN;
Step 52:MN initiates the signaling process of QoS NSLP, on the communication path of MN and CN, sets up QoS NSLP state jointly with CN.
In the embodiment of the invention; After MN moves to field network; No matter MN all changes from passive to active as data receiver or data sending terminal, initiates on new communication path, to set up the signaling process of QoS resource reservation; Thereby NSIS is responded to the IP layer moving event of node as early as possible, shortened the time of setting up the QoS resource reservation.
Embodiment 1
Present embodiment provides a kind of method of the QoS of foundation resource reservation signaling flow.Among this embodiment, suppose that CN is as data sending terminal.In view of the hierarchical design of the two-layer protocol stack architecture of NSIS, after MN moves to field network acquisition CoA, accomplish the signaling action of NTLP layer in the NSIS protocol stack in advance, set up the GIST state.Afterwards; It is that GIST-data-QUERY sets up along the QoS NSLP state of optimizing relevant Qos NSIS intermediate node (QNE, Qos NSIS Entity) on the routed path that MN initiatively sends the universal network signaling transfer protocol data query message that is used for command transmitting application layer protocol data.If the pairing CN of MN still continues to keep communicating by letter with MN; Sending the universal network signaling transfer protocol data reserving message that is used for command transmitting application layer protocol data by CN to MN again is the GIST-data-RESERVE signaling message, accomplishes the signaling action of the QoS NSLP in the NSIS protocol stack.
Followingly the method for setting up the QoS resource reservation that present embodiment provides is described in detail according to Fig. 6.As shown in Figure 6, this method mainly may further comprise the steps:
Step 101: after mobile node moves to field network, recording address information and IP address, the NSIS state information of searching Correspondent Node.
After MN moves to field network, obtain CoA with assurance and extraneous communication, and write down the CoA that MN obtains at field network; Search the IP address of the Correspondent Node that before moving, has obtained simultaneously, the NSIS state information between MN and the CN, this NSIS state information comprises session sign (SID; Session Identification); The message signaling is used, message routing state, message relating; Qos resource obligate information (for example, this session QoS requires to comprise bandwidth, delay, shake) etc.
Step 102: mobile node sends query messages, sets up the GIST state.
MN moves to after field network obtains CoA, initiatively sends GIST-Query message (that is, query messages) to CN, and then sets up NSIS lower-layer protocols stack state (GIST state in other words).Need to prove that in this step, MN may be through optimizing several intermediate nodes QNE on the routed path to the GIST-Query message that CN sends.
Wherein, after the optimization routed path referred to that MN moves to field network, the new data transfer path between CN and the MN wherein possibly comprise several intermediate nodes QNE.
Wherein, When setting up the GIST state; MN sends GIST-Query message to the intermediate node QNE that optimizes on the routed path, sends GIST-Response message by QNE to MN, sends GIST-Confirm message by MN to QNE again; Through above-mentioned three-way handshake process, the foundation of GIST state is accomplished on hop-by-hop formula ground.
The above-mentioned GIST of foundation state is that hop-by-hop carries out on several intermediate nodes QNE that optimizes on the path, is not to set up simultaneously comprehensively.Wherein, hop-by-hop be appreciated that for: MN and a QNE set up after the GIST state, set up the GIST state by this QNE and next QNE.If exist before the GIST state between two entities, can need not to rebulid, only need to upgrade the GIST state, for example comprise the timestamp that upgrades this state.The renewal with the GIST state of rebuliding that need to prove the GIST state all belongs to and sets up the GIST state procedure.
Step 103: mobile node is initiated the foundation of QoS NSLP state.
MN sends GIST-data-QUERY message, initiates to set up QoS NSLP state.Can add a mobile flag bit (Mobility Flag) in public head (Common Header) lining of Qos NSLP, this flag bit makes the QNE node on the signaling paths learn that this is the resource reservation under mobile environment, is different from common resource reservation.The QNE node can learn whether the QoS NSLP state of this node was set up through the mobile flag bit that adds.In the present embodiment, move flag bit if QNE querying node self exists, represent that then the QoS NSLP state of this node was set up, need not rebulid this state this moment, and the data message that only needs to upgrade in this state gets final product.It is understandable that, can also the QNE node learned through other modes and whether need rebulid QoS NSLP state, for example whether QNE querying node self preserves SID.After CN received the GIST-data-QUERY message of initiatively being sent by MN, CN sent it back one and comprises the GIST-data-RESERVE message that moves flag bit if will continue to keep communicating by letter with MN.
Wherein, the foundation of QoS NSLP state is also carried out through the hop-by-hop formula, and wherein the hop-by-hop formula is carried out process with the above.
Need to prove,, still need carry out the process of BU and BA between MN and the CN, and the above-mentioned steps of the process of BU and BA and present embodiment is the generation that walks abreast, also have concurrency relation in time when MN moves to after field network obtains CoA.In the prior art; After needing to wait for that MN and CN completion BU and BA process are carried out; Could initiated to set up QoS resource reservation process by CN, be serial in time, thereby the process of this wait has delayed time of on the new communication path of CN and MN, setting up the QoS resource reservation.
After step 104:QoS NSLP state is set up and accomplished, on new route, accomplish actual resource reservation.
After MN receives the GIST-data-RESERVE message of CN transmission; MN responds a universal network signaling transfer protocol data response message GIST-data-RESPONSE message that is used for command transmitting application layer protocol data, and these two message all include mobile flag bit.On common path, do the renewal work of NSIS state, on non-common path, do actual resource reservation.Wherein, actual resource reservation is that each intermediate node QNE entity keeps a part for this session from the resource of its grasp.
About said common path and non-common path, be the example explanation with prior art Fig. 3.Fig. 3 is the topological diagram of NSIS in typical mobile IP v 6 network.MN is before switching to field network, and original communication path is: CN-Router-QNE-Access Router A-MN.After the switching, new communication path is: CN-Router-QNE '-Access Router B-MN.Relatively two paths can be known; It is CN-Router that there is one section common path in new and old two communication paths; New and old afterwards communication path bifurcated, for the QNE '-Access Router B-MN that switches on the new communication path in back, this section of present embodiment definition path is non-common path.According to above-mentioned steps 102 and step 103; On common path, set up relevant NSIS state before the switching, comprise Qos NSLP state and GIST state; The state that switches on the common path of back does not need to rebulid fully; Only need to upgrade the GIST state and get final product, comprise the data of NTLP layer, for example the timestamp of GIST state.And on non-common path, have no the NSIS state, need on this path, set up the NSIS state.
As shown in Figure 7, for present embodiment provide when CN as data sending terminal, MN during as data receiver, MN initiates to set up the signaling process sketch map of QoS resource reservation.In the present embodiment, MN moves to field network, the MN ' shown in promptly scheming (with MN is identical entity node, and only expression moves to the label in other places), and after MN obtained CoA, initiating NSIS lower floor immediately was the GIST signaling process, has set up the GIST state; Afterwards,, then on the path of having set up the GIST state, set up QoS NSLP state, do actual resource reservation if CN continues to communicate by letter with MN.The two-layer protocol stack architecture of NSIS makes that in the mobile IP v 6 network after communication path changed, its NTLP layer and QoS NSLP layer need be done corresponding processing, on new communication path, set up the state of this protocol layer.In using in real time, resource reservation must be set up on new communication path as early as possible, to avoid the degradation of QoS.
In the method for setting up the QoS resource reservation that present embodiment provides; MN moves to after field network obtains CoA; MN can directly initiate to set up the signaling process of QoS resource reservation on new communication path, practiced thrift CN and sent time that BU message carry out Binding Update registration to time and the MN that MN sends data to CN through the triangle route.Prior art must be passed through these two parts after the time; Could set up the signaling process of QoS resource reservation; And present embodiment is parallel with the process of the signaling process of setting up the QoS resource reservation with the process of BU, BA; Thereby make the time have concurrency relation, this makes NSIS make a response to IP layer traveling time sooner, on new communication path, sets up the QoS resource reservation signaling flow fast.
Embodiment 2
Present embodiment provides a kind of method of the QoS of foundation resource reservation signaling flow.Among this embodiment, suppose that MN is as data sending terminal.In view of the hierarchical design of the two-layer protocol stack architecture of NSIS, after MN moves to field network acquisition CoA, accomplish the signaling action of NTLP layer in the NSIS protocol stack in advance, set up the GIST state.MN initiatively sends GIST-data-RESERVE and sets up the QoS NSLP state that relevant QNE node on the routed path is optimized on the edge afterwards.If MN still continues to keep communicating by letter with CN, send the GIST-data-RESPONSE signaling message by CN to MN again, accomplish the signaling action of the QoS NSLP in the NSIS protocol stack, set up new QoS resource reservation signaling flow.
Referring to Fig. 8, present embodiment provides a kind of method of the QoS of foundation resource reservation signaling flow, specifically may further comprise the steps:
Step 201: after mobile node moves to field network, recording address information and IP address, the NSIS state information of searching Correspondent Node.
This step is similar with the step 101 of a last embodiment in the present embodiment, repeats no more here.
Step 202: mobile node sends query messages, sets up the GIST state.
MN moves to after field network obtains CoA, initiatively sends GIST-Query message to CN, sets up NSIS lower-layer protocols stack state (GIST state in other words).
Wherein CN is final correspondent node, and this step will be set up the GIST state through QNE node hop-by-hop formula in the middle of several equally.This GIST state is not between per two entity nodes, all to rebulid, if between two entities the GIST state before exist, then need not to rebulid.
A the same embodiment is said; When setting up the GIST state; Need to send GIST-Query message to the intermediate node QNE that optimizes on the routed path through MN; Send GIST-Response message by QNE to MN, send GIST-Confirm message by MN to QNE again, accomplish the foundation of GIST state through above-mentioned three-way handshake process hop-by-hop formula ground.
This step is similar with the step 102 of a last embodiment, repeats no more here.
Step 203: mobile node is initiated the foundation of QoS NSLP state.
MN sends GIST-data-RESERVE message to CN, initiates to set up QoS NSLP state.A the same embodiment step 103 is said; Can in the Common of QoS NSLP Header, add a mobile flag bit (Mobility Flag); This flag bit makes the QNE node on the signaling paths learn that this is the resource reservation under mobile environment, but not common resource reservation.
Need to prove that MN is after moving to the other places, MN is concurrency relation through the triangle route to the said process that CN sends this process of packet and present embodiment in time.Existing technology must wait for that then MN sends packet through the triangle route to CN; After CN receives first packet that is sended over from the triangle route by MN; CN initiates NSIS QoS resource reservation signaling flow; Therefore be serial in time, the triangle routing procedure of this wait has delayed time of on the new communication path of CN and MN, setting up the QoS resource reservation.
After step 204:QoS NSLP state is set up and accomplished, on new route, accomplish actual resource reservation.
After CN received GIST-data-RESERVE message, CN sent it back one and comprises the GIST-data-RESPONSE message that moves flag bit if will continue to keep communicating by letter with MN.On common path, do the reparation of NSIS state, on new route, do resource reservation, thereby set up the resource reservation of new route.
As shown in Figure 9, for present embodiment provide as MN during as data sending terminal, MN initiates to set up the signaling process sketch map of QoS resource reservation signaling flow.In the present embodiment, MN is as data sending terminal, and MN moves to after field network obtains CoA, and MN can directly initiate to set up the signaling process of QoS resource reservation signaling flow on new communication path.Compare prior art, the time of the technical scheme saving of present embodiment mainly is that MN passes through the triangle route to the time that CN sends data, on new communication path, can set up the QoS resource reservation signaling flow more apace like this.
Embodiment 3
Participate in Figure 10, present embodiment provides a kind of mobile node, and this mobile node comprises:
First state is set up module 31; When being used for mobile node and moving to field network; Initiate the signaling process of universal network signaling transfer protocol, the signaling process of said universal network signaling transfer protocol is used on the communication path of this mobile node and correspondent node, setting up universal network signaling transfer protocol state;
Second state is set up module 32; The signaling process that is used for initiating QoS signaling application layer protocol, the signaling process of said service quality signal application layer protocol are used on the communication path of this mobile node and correspondent node, setting up service quality signal application layer protocol state.
Present embodiment MN moves to after field network obtains CoA, and MN can directly initiate to set up GIST state and QoS NSLP on new communication path signaling process is promptly set up the signaling process of QoS resource reservation.Compare prior art, the time of the technical scheme saving of present embodiment mainly is that MN passes through the triangle route to the time that CN sends data, on new communication path, can set up the QoS resource reservation more apace like this.
Embodiment 4
Participate in Figure 11, present embodiment provides a kind of system of the QoS of foundation resource reservation signaling flow, and this system comprises:
Mobile node (MN), intermediate node and correspondent node (CN);
MN is used for when MN moves to field network, initiates the signaling process of universal network signaling transfer protocol, on the communication path of MN and CN, sets up universal network signaling transfer protocol state;
MN also is used to initiate the signaling process of qos signaling application layer protocol, on the communication path of MN and CN, sets up said qos signaling application layer protocol state;
Intermediate node is used to respond the signaling process of setting up the QoS resource reservation that CN initiates, and when said qos signaling application layer protocol state was set up completion, intermediate node was set up actual QoS resource reservation;
CN is used to respond the signaling process of setting up the QoS resource reservation that MN initiates, and sets up GIST state and QoS NSLP state jointly with MN.
After present embodiment MN moves to field network; MN can directly initiate to set up the signaling process of QoS resource reservation on new communication path; Practiced thrift CN and sent time that BU message carry out Binding Update registration to time and the MN that MN sends data to CN through the triangle route, prior art must be passed through these two parts after the time, could set up the QoS resource reservation; And present embodiment is parallel with the process of the signaling process of setting up the QoS resource reservation with the process of BU, BA; Thereby make the time have concurrency relation, this makes NSIS make a response to IP layer traveling time sooner, on new communication path, sets up the QoS resource reservation fast.
The embodiment of the invention can realize that corresponding software can be stored in the storage medium that can read, for example in the hard disk of computer, CD or the floppy disk through software.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a method of setting up service quality resource reservation signaling flow is characterized in that, said method comprises:
When mobile node moves to field network; After obtaining Care-of Address; Initiatively initiate the signaling process of universal network signaling transfer protocol, the signaling process of said universal network signaling transfer protocol is used on the communication path of said mobile node and correspondent node, setting up said universal network signaling transfer protocol state;
Said mobile node is the signaling process of initiating QoS signaling application layer protocol initiatively, and the signaling process of said service quality signal application layer protocol is used on the communication path of said mobile node and said correspondent node, setting up said service quality signal application layer protocol state.
2. the method for setting up service quality resource reservation signaling flow according to claim 1 is characterized in that, the signaling process of said universal network signaling transfer protocol comprises:
Said mobile node sends universal network signaling transfer protocol query messages to downstream node;
Said downstream node is replied universal network signaling transfer protocol response message;
Said mobile node sends universal network signaling transfer protocol acknowledge message to said downstream node;
Said mobile node is set up said universal network signaling transfer protocol state along the communication path of said mobile node and correspondent node with the downstream node hop-by-hop, is said correspondent node until last downstream node.
3. the method for setting up service quality resource reservation signaling flow according to claim 1 is characterized in that, saidly on the communication path of said mobile node and correspondent node, sets up said universal network signaling transfer protocol state and comprises:
Enterprising the working of common path at the communication path of said mobile node and correspondent node with the renewal of network signal host-host protocol state;
Enterprising the working of non-common path at the communication path of said mobile node and correspondent node with the foundation of network signal host-host protocol state.
4. the method for setting up service quality resource reservation signaling flow according to claim 1 is characterized in that, when said mobile node was data receiver, the signaling process of said service quality signal application layer protocol comprised:
Said mobile node sends the universal network signaling transfer protocol data query message that is used for command transmitting application layer protocol data to downstream node;
Said downstream node is replied the universal network signaling transfer protocol data reserving message that is used for command transmitting application layer protocol data;
Said mobile node is replied the universal network signaling transfer protocol data response message that is used for command transmitting application layer protocol data to said downstream node;
Said mobile node is set up said service quality signal application layer protocol state along the communication path of said mobile node and correspondent node with the downstream node hop-by-hop, is said correspondent node until last downstream node.
5. the method for setting up service quality resource reservation signaling flow according to claim 1 is characterized in that, when said mobile node was data sending terminal, the signaling process of said service quality signal application layer protocol comprised:
Said mobile node sends the universal network signaling transfer protocol data reserving message that is used for command transmitting application layer protocol data to downstream node;
Said downstream node is replied the universal network signaling transfer protocol data response message that is used for command transmitting application layer protocol data;
Said mobile node is set up said service quality signal application layer protocol state with the downstream node hop-by-hop, until the said correspondent node of last downstream node along the communication path of said mobile node and correspondent node.
6. according to the described method of setting up service quality resource reservation signaling flow of arbitrary claim in the claim 2,4,5, it is characterized in that said downstream node comprises: intermediate node and correspondent node.
7. the method for setting up service quality resource reservation signaling flow according to claim 6 is characterized in that, when said service quality signal application layer protocol state was set up completion, intermediate node was set up service quality resource reservation.
8. a mobile node is characterized in that, comprising:
First state is set up module; When being used for said mobile node and moving to field network; After obtaining Care-of Address; Initiatively initiate the signaling process of universal network signaling transfer protocol, the signaling process of said universal network signaling transfer protocol is used on the communication path of said mobile node and correspondent node, setting up said universal network signaling transfer protocol state;
Second state is set up module; Be used for the initiatively signaling process of initiating QoS signaling application layer protocol, the signaling process of said service quality signal application layer protocol is used on the communication path of said mobile node and said correspondent node, setting up said service quality signal application layer protocol state.
9. a system that sets up service quality resource reservation signaling flow is characterized in that, said system comprises:
Mobile node; Be used for when said mobile node moves to field network; After obtaining Care-of Address; Initiatively initiate the signaling process of universal network signaling transfer protocol, the signaling process of said universal network signaling transfer protocol is used on the communication path of said mobile node and correspondent node, setting up said universal network signaling transfer protocol state; And the signaling process of initiating QoS signaling application layer protocol, the signaling process of said service quality signal application layer protocol are used on the communication path of said mobile node and said correspondent node, setting up said service quality signal application layer protocol state;
Intermediate node is used to respond the signaling process of the said universal network signaling transfer protocol that said mobile node initiates, and on the communication path of said mobile node and correspondent node, sets up said universal network signaling transfer protocol state; And respond the signaling process of the said service quality signal application layer protocol of said mobile node initiation, on the communication path of said mobile node and said correspondent node, set up said service quality signal application layer protocol state;
Correspondent node is used to respond the signaling process of the said universal network signaling transfer protocol that said mobile node initiates, and on the communication path of said mobile node and correspondent node, sets up said universal network signaling transfer protocol state; And respond the signaling process of the said service quality signal application layer protocol of said mobile node initiation, on the communication path of said mobile node and said correspondent node, set up said service quality signal application layer protocol state.
10. the system that sets up service quality resource reservation signaling flow according to claim 9 is characterized in that,
Said intermediate node also is used for when said service quality signal application layer protocol state is set up completion, and intermediate node is set up service quality resource reservation.
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| CN1549517A (en) * | 2003-05-08 | 2004-11-24 | 中国科学技术大学 | Transparent next generation network layer protocol model and method based on hierarchical move management flow |
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