CN101478565B - Inter-domain bandwidth reservation and address conversion method in address exchange architecture - Google Patents
Inter-domain bandwidth reservation and address conversion method in address exchange architecture Download PDFInfo
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Abstract
An inter-domain bandwidth reservation and address switching method in the address switching architecture belongs to the computer network technique field characterized by: defining proprietary high performance network address blocks in each autonomous domain, selecting paths and reserving bandwidth for address blocks; controlling the distribution and the use of the high performance address by newly increasing a three-layer soft-switch equipment and a three-lay accessing control gateway device; defining a method for dynamically distributing the high performance address when one autonomous domain has a plurality of management domains; defining a team work method between the three-lay soft-switch equipments in each autonomous domain when a plurality of autonomous domains exist. Thus the service quality and safety of a cross-domain application service based on above method are insured. The invention effectively solves the service quality QoS and the network security problems in the prior network, and has good expandability and stability.
Description
Technical field
In the switching architecture of address between the territory RSVP and address exchanging method belong to technical field of the computer network.
Background technology
The Internet based on packet switching has become the most important information infrastructure in the whole world at present, and the integration of three networks of communication network, broadcasting and television network and computer network is the common recognition that technical foundation has become people with the Internet.The Internet has characteristics such as but the good survivability of extensibility is strong, flexibility is strong, omnipresent, but at present the design concept of " do not have connect, end-to-end and do one's best " of the Internet has also been brought poor stability, can't guarantee service quality (QoS) and do not had the significant problems such as economic model of distinct sustainable development.Application such as video, application in real time, P2P constantly increase for the demand of the Internet bandwidth; But the raising of router performance receives the restriction of Moore's Law; Cause the demand of infinite bandwidth and the contradiction of band-limited resource, the demand of fail safe simultaneously and reliability makes this contradiction intensify more.
Though carried out years of researches internet arena, the communications field and field of broadcast televisions people; For each independently problem many solutions have been proposed; But some solution has been brought problems such as extensibility from having run counter to the design concept of the Internet in essence.Simultaneously, the cost to the solution of individual problem is to cause other problems to become more serious.(the particularly U.S.) also starts some major projects at present in the world, and purpose is to design again internet architecture, and still in view of the scale of the Internet, the whole world, it is impossible abandoning present the Internet.
Generalized ribbon bandwidth reservation and address exchanging method have made full use of packet switching and Circuit-switched advantage in the address switching architecture that the present invention proposes; On the basis that does not change existing internet core agreement; Internet architecture is carried out significant improvement, systematically solved service quality (QoS) problem, Security Control Problem and the sustainable development economy model problem of present the Internet.
Essential characteristic of the present invention comprises: 1) the proprietary high performance network address block of definition in each autonomous territory; For these address blocks are selected path and bandwidth reserved; Therefore on selected path, can guarantee to use the service quality of the terminal system of these address blocks, like indexs such as bandwidth, time-delay, packet loss, shakes; 2) newly-increased three layers of soft switching server and three layers of access control gateway router are controlled the distribution and the use of high performance address; Three layers of soft switching server are according to the high-performance user demand, identifying user identity, and information such as service-domain according to the maximum concurrent quantity that is allowed simultaneously and carry out access control for high-performance user, dynamic assignment high performance address section; Three layers of access control gateway router come into force the high performance address section; Control its bandwidth and mutual through with this autonomous territory Routing Protocol (iBGP or eBGP multihop etc.), be published to the route of the high performance address section of dynamic assignment on the path in each management sub domain; 3) method of the dynamic assignment high performance address of definition when having a plurality of management domain in the autonomous territory; 4) definition is when having a plurality of autonomous territory, the collaboration working method between three layers of soft switching server in each autonomous territory.
Summary of the invention
The objective of the invention is on the basis that does not change existing the Internet, systematically solve the economic model problem of service quality (QoS) problem, Security Control Problem and the sustainable development of present the Internet.Structure of the present invention is as shown in Figure 1; Comprise two autonomous territories; Each autonomous territory has backbone network management domain and Access Network management domain; The address switching architecture has all been implemented in two autonomous territories, has arranged corresponding three layers of soft switching server and numerous three layers of access control equipment for the high-performance user configuration respectively.These two autonomous territories can mutual communication through the Internet, but this is based on the service of " doing one's best ", can't guarantee service quality.Therefore, privately owned interconnected (peering) set up in these two the Internets, can provide the application service that service quality guarantees and has fail safe to guarantee for the user that high performance demands is arranged.Simultaneously, the good economic model that has sustainable development based on Internet service of the present invention.
RSVP and address exchanging method between the territory in the switching architecture of address; It is characterized in that said method is in a plurality of management domains in two autonomous territories or an autonomous territory, to adopt under the reciprocity mutual contact mode situation to realize according to the following steps successively: step (1): initialization
Take need than the macroreticular bandwidth resources and require end-to-end quality of service and application service that fail safe guarantees is defined as the performance application service; The address definition that is used for the performance application service that from whole internet address space, divide, dynamic assignment is a high performance address, and all the other address definitions that are used to be connected into the Internet and the service of non-performance application are common IP address; Distribute high performance address for high-performance user in real time as required;
According to the building block of address exchanging method in the single autonomous territory, the Internet, pre-configured network infrastructure based on present Internet protocol is at three layers of soft switching server of each autonomous territory configuration; Three layers of access control gateway router of subnet configuration at the high-performance user place; The user who intends the service of application performance application uses enhancement type dynamic address user terminal;
Define the parameter of described performance application demand, comprise the network service zone at user's communication object place, opposite end, required bandwidth, corresponding service amount and needed time-delay, packet loss, shake are at interior Service Quality Metrics; Reserve the high performance address piece of some settings and bind mutually with the high performance demands of setting (parameter);
Step 1.1: pre-configured network infrastructure based on present Internet protocol:
Step 1.1.1: between autonomous territory, set up privately owned interconnected peering,, carry out BGP route static, cluster to corresponding high performance address and announce for the high performance address piece is selected the cross-domain path of privately owned interconnected peering; Simultaneously, carry out the RSVP of selected cross-domain link through the COS strategy of configuration router; Corresponding three layers of soft switching server to two autonomous territories load link database respectively;
Step 1.1.2:, in autonomous territory, carry out the RSVP under extreme case for high performance address through the COS strategy of configuration router;
Step 1.1.3: all address three layers of access control gateway routers of exchange are set up neighborhood in the one or more router configuration Routing Protocol that each management domain in this autonomous territory is selected and this autonomous territory; When the high performance address dynamic assignment was given three layers of access control gateway router in this autonomous territory, the corresponding route of this high performance address just can be distributed on all routers of each management domain in this autonomous territory like this;
Step 1.2: three layers of soft switching server initialization:
User-network signal UNI and network-Network signaling NNI are set,, notify three layers of access control gateway router high performance address to be carried out control and treatment, the high performance address of notifying the user to use according to performance application request from the user; Behind the sign off, notify the user charging result, notify three layers of access control gateway router that high performance address is handled; Notify this high performance address to regain, upgrade Relational database;
Step 1.3: three layers of access control gateway router initialization:
Network-Network signaling NNI is set,, the high performance address of appointment is carried out interface configuration, route issue, port flow control according to notice from said three layers of soft switching server; When sign off, according to notice, cancel interface configuration, route issue to this high performance address from said three layers of soft switching server, port flow control,
Step 1.4: enhancement type dynamic address user terminal:
User-network signal UNI is set,, receives the high performance address of the appointment that distributes in the notice of said three layers of soft switching server, on this machine, dispose to said three layers of soft switching server application performance application service required address; Or receive from of the automatic configuration of three layers of access control gateway router to the high performance address of appointment; During sign off, notify said three layers of soft switching server, these three layers of soft switching servers are issued the user with charging result;
Network-Network signaling NNI form includes: ID, serial number, user's local terminal high performance address section, maximum bandwidth, and the improper wait duration that withdraws from,
User-network signal UNI form includes: ID, serial number, the common address of user's local terminal, the common address of Correspondent Node, user's local terminal high performance address section, this application demand bandwidth of user; The improper wait duration that withdraws from, step (2): performance application is used in the high-performance user application
Step 2.1: when a certain high-performance user user a among the autonomous territory X need carry out high performance communication with a certain high-performance user user h among the autonomous territory Z, this user a will be through the said three layer soft switching server submit applications of subscriber signaling UNI to this autonomous territory;
Step 2.2: said three layers of soft switching server in this autonomous territory are through the identity of this user a of customer data base checking; Whether concurrent user's quantity of verifying this service on autonomous territory, the opposite end of asking and the corresponding fast autonomous territory link through link database does not reach upper limit N; Satisfy like above condition; Said three layers of soft switching server in this autonomous territory obtain a high performance address section dynamic assignment through address database and give this user a, communicate by letter with three layers of access control gateway router of this user a place subnet through network-Network signaling NNI simultaneously, transmit to comprise the high performance network address field; Maximum bandwidth, the improper wait duration that withdraws from is in interior parameter; If, then do not refuse said high performance service request, if the quantity of high-performance user of using this interconnected link is then also refused the request of this user a more than or equal to N through checking; Request once more after this user a will wait a period of time;
Step 2.3: said three layers of access control gateway router obtain comprising the high performance address of dynamic assignment from said three layers of soft switching server; Maximum bandwidth that allows and the improper duration that withdraws from are in interior parameter; Be configured to said high performance address on the equipment interface that links to each other with this high-performance user place subnet, and this interface carried out flow restriction according to the bandwidth of maximum permission; Through the neighborhood of setting up with this autonomous territory Routing Protocol for preparing in advance, be published to the route of the high performance address section of dynamic assignment on the path in each management domain; Said three layers of access control gateway router start the improper timing of withdrawing from;
Step 2.4: three layers of soft switching server in autonomous territory, network-Network signaling opposite end, autonomous territory are striden in said three layers of soft switching server utilization in this autonomous territory; Transmission parameters is: the ID h of opposite end, serial number, local terminal high performance address section, maximum bandwidth, the improper wait duration that withdraws from;
Step 2.5: three layers of soft switching server in autonomous territory, opposite end; Identity through customer data base checking user h; Whether concurrent user's quantity of verifying this service on autonomous territory, the opposite end of asking and the corresponding fast autonomous territory link through link database does not reach upper limit N, satisfied like above condition, and said three layers of soft switching server in this autonomous territory obtain a high performance address section dynamic assignment to this user h through address database; Communicate by letter with three layers of access control gateway router of this user h place subnet through network-Network signaling NNI simultaneously; Transmission comprises the high performance network address field, maximum bandwidth, and the improper wait duration that withdraws from is in interior parameter; If, then do not refuse said high performance service request, if the quantity of high-performance user of using this interconnected link is then also refused the request of this user h more than or equal to N through checking; Then notify three layers of soft switching server in the autonomous territory of local terminal;
Step 2.6: three layers of access control gateway router of said opposite end obtain comprising the high performance address of dynamic assignment from three layers of soft switching server of said opposite end; Maximum bandwidth that allows and the improper duration that withdraws from are in interior parameter; Be configured to high performance address on the equipment interface that links to each other with high-performance user place subnet, and this interface carried out flow restriction according to the bandwidth that maximum allows; Through the neighborhood of setting up with this autonomous territory Routing Protocol for preparing in advance, be published to the route of the high performance address section of dynamic assignment on the path in each management domain; Said three layers of access control gateway router start the improper timing of withdrawing from;
Step 2.7: three layers of access control gateway router of said local terminal notify three layers of soft switching server configuration of said local terminal to accomplish; The three layers of access control gateway router in this opposite end notify the three layers of soft switching server configuration in this opposite end to accomplish; The three layers of soft switching server in this opposite end notify said local terminal three layers of soft switching server through striding autonomous territory network-Network signaling NNI, and the three layers of soft switching server in local terminal and opposite end start the improper timing of withdrawing from;
Step 2.8: high-performance user a and high-performance user h obtain high performance address, use performance application through high performance address; Because this sector address has reserved bandwidth, distribute through authentication simultaneously, just guaranteed the service quality QoS of two-way communication and the authenticity of bidirectional traffics fully;
Step (3): high-performance user finishes to use performance application
Step 3.1: behind the high performance communication of user a completion and user h; Notify three layers of soft switching server in this autonomous territory through user-network signal UNI, send ending message;
Step 3.2: three layers of soft switching server in said autonomous territory reclaim corresponding high performance address, notify corresponding three layers of access control gateway router to revise configuration through network-Network signaling NNI;
Step 3.3: three layers of soft switching server that the autonomous territory of autonomous territory said network-Network signaling NNI notice opposite end is striden in three layers of soft switching server utilization in this autonomous territory finish high performance communication;
Step 3.4: three layers of access control gateway router in this autonomous territory stop the network interface configuration of corresponding high performance address, flow control configuration and route distribution, and the routing iinformation of temporarily distributing to the high performance address section of user a in this autonomous territory disappears;
Step 3.5: three layers of access control gateway router in autonomous territory, opposite end stop the network interface configuration of corresponding high performance address, flow control configuration and route distribution, and the routing iinformation of temporarily distributing to high-performance/30 address fields of user h in the autonomous territory, opposite end disappears;
Step 3.6: three layers of soft switching server of local terminal stop to charge; Notifying corresponding high-performance user based on the charging result of bandwidth and time product; The updating user data storehouse; Address database and billing database, this section high performance address section discharges, and waits for that distributing to next requesting users uses;
Step 3.7: the three layers of soft switching server in opposite end, the updating user data storehouse, address database and billing database, this section high performance address section discharges, and waits for that distributing to next requesting users uses.
Where necessary, utilize quasi minimum state flow-control equipment and method to carry out flow restriction for common address; Make the single stream in common address employable maximum bandwidth less than service bandwidth that high performance address provided.
According to circumstances preferential Internal BGP (iBGP) or multi-hop External BGP (eBGP multihop) or the interior routing protocol (IGP) of selecting to be used for the route reflection server.
Present specification describing method FB(flow block) is as shown in Figure 2.The experiment test environment is as shown in Figure 3.
The experiment test result has reached the requirement of the present invention's expection.Through distinguishing domestic consumer and high-performance user; Be the high performance address bandwidth reserved; Carry out access control according to application for high-performance user; Dynamic assignment high performance address and corresponding charging, the application that systematically, through engineering approaches has successfully solved high-performance user provides service quality to guarantee that (QoS) and fail safe guarantee, and can have good economic model.
Description of drawings
RSVP and address exchanging method structure chart between the territory in the switching architecture of Fig. 1 address.
RSVP and address exchanging method workflow block diagram between the territory in the switching architecture of Fig. 2 address.
Fig. 3 experiment test environment network connects topological diagram.
Embodiment
The present invention describes generalized ribbon bandwidth reservation and address exchanging method in the switching architecture of address; Comprise two autonomous territories of implementing the address switching architecture; Have privately owned interconnected (peering) between these two autonomous territories, disposed three layers of soft switching server in each autonomous territory respectively, for high-performance user has disposed corresponding three layers of access gateway device; Simultaneously, all there are a plurality of management domains in these two autonomous territories.Key technology involved in the present invention has:
RSVP and collaborative work between (1) two autonomous territory
The internet address switching architecture can be implemented in autonomous territory independently, also can between two even a plurality of autonomous territory, implement.When implementing, can guarantee the service quality of bidirectional traffic in the autonomous territory and in the service quality of striding the inbound traffics in this autonomy territory under the situation of autonomous territory in an autonomous territory.For the service quality of the two-way communication that guarantees to stride autonomous territory, suggestion is set up privately owned interconnected between two autonomous territories, and all implements the address switching architecture in these two autonomous territories.
The calculating of privately owned interconnected bandwidth can be according to the traffic carrying capacity of high-performance user and the percent of call lost of permission, according to Erlang's formula
Calculate required maximum concurrent communication number of processes, wherein a is a traffic carrying capacity, and N is a concurrent user number, and E is a blocking rate.On this basis,, calculate required cross-domain bandwidth W, promptly select B * N≤W according to the bandwidth demand B that above-mentioned concurrent user number N communicates by letter with single high performance network.
When the internet address switching architecture is implemented in two autonomous territories respectively; For the service quality of the two-way communication that guarantees to stride autonomous territory, between three layers of soft switching server between two autonomous territories or must carry out mutual between the enhancement type dynamic address user terminal equipment.Carry out between the enhancement type dynamic address user terminal equipment when mutual when having only, this situation is defined as loose coupling.This situation be the user after holding consultation respectively three layers of soft switching server in autonomous territory separately carry out the application of high performance address, its flow process is the same with the situation in single autonomous territory.Under the situation of loose coupling, only obtain high performance address in some autonomous territories, therefore can only guarantee should autonomy territory one-way communication (inbound traffics) service quality.Between cross-domain enhancement type dynamic address user terminal equipment, carry out mutual, also carry out between three layers of cross-domain soft switching server when mutual, this situation is defined as close coupling.The present invention describes tightly coupled situation exactly.Mutual through between the three layers of SoftSwitch separately of two autonomous territories can be coordinated the bandwidth resources between two interconnected the Internets of equity all sidedly, guarantees the service quality of two-way communication (go out, inbound traffics).
The communication of three layers of soft switching server between two autonomous territories is by striding autonomous territory network-Network implementing signalling.Stride autonomous territory network-Network signaling and comprise the ID of opposite end, serial number, local terminal high performance address section, maximum bandwidth etc., as shown in the table:
<inter-as-nni>
< customer id=" customerid ">// ID
</customer>
< order id=" ordered ">// serial number
</order>
< metric name=" prefix " unit=" IPv4 ">// user's local terminal high performance address section
z.z.z.z/m
</metric>
< metric name=" max_bandwidth " unit=" Mbps ">// maximum bandwidth
30
</metric>
< metric name=" command ">// instruction
active
</metric>
</inter-as-nni>
Collaborative work between (2) a plurality of management systems in autonomous territory
When in the autonomous territory a plurality of management domain being arranged; Three layers of access control gateway router of high-performance user place subnet must be set up routing relation with the router of each management domain respectively, so as the route distribution of the high performance address of dynamic assignment in each management domain.Its Routing Protocol can be an interior routing protocol, also can be the border Routing Protocol.Border Routing Protocol (BGP) is adopted in suggestion.
If certain management domain has identical autonomous territory number with the backbone network at three layers of soft switching server place; Should adopt inner boundary Routing Protocol iBGP; The iBGP Router Reflector technology of use standard makes three layers of access control gateway router and one or more iBGP route reflection server set up neighborhood.
If certain management domain has different autonomous territory numbers with the backbone network at three layers of soft switching server place; Should adopt outer boundary Routing Protocol eBGP; The eBGP multi-hop technology (eBGP multihop) of use standard makes three layers of access control gateway router and one or more eBGP router set up neighborhood.
Adopt above-mentioned technology, can be in each management domain the route distribution of the high performance address of dynamic assignment.
A practical implementation case of the present invention is as shown in Figure 3.
Autonomous territory A is 2.5Gbps to the bandwidth of the Internet, and autonomous territory B is 1Gbps to the bandwidth of the Internet.Because the user of autonomous territory A is numerous, autonomous territory A often arrives 2.5G so can't support autonomous territory A to the high performance communication between the autonomous territory B to the bandwidth of the Internet.High performance communication between autonomous territory A and the autonomous territory is the DVTS video, every road video 30Mbps.Privately owned interconnected bandwidth between autonomous territory A and autonomous territory B is 155Mbps, in this case, can support 5 tunnel concurrent DVTS to communicate by letter.
Autonomous territory A has common address 202.112.0.0/16 and high performance address 202.38.100.0/24, and autonomous territory B has common address 210.25.0.0/20 and high performance address 210.25.255.0/24.The border router R1.3 of autonomous territory A is for the BGP configuration of the Internet (autonomous territory number 701) with to the privately owned interconnected BGP configuration of autonomous territory B (autonomous territory number 9406) (the border router R2.3 of autonomous territory B lists no longer separately for the BGP configuration of the Internet and similar with it to the privately owned interconnected BGP configuration of autonomous territory A) as shown in the table.
！
router?bgp?4538
Address exchange neighbours
neighbor?202.112.62.2?remote-as?9406
neighbor?202.112.62.2?description?pavite-peering-to-as?9406
neighbor?202.112.62.2?prefix-list?MY_ASW_PREFIX?out
neighbor?202.112.62.2?prefix-list?NEIGHBOR_ASW_PREFIX
The Global Internet neighbours
neighbor?202.112.62.129?remote-as?701
neighbor?202.112.62.129?description?to-global-internet
neighbor?202.112.62.129?prefix-list?MYPREFIX?out
neighbor?202.112.62.129?access-list?3?in
Cluster is announced
network?202.112.0.0?mask?255.255.0.0
network?202.38.100.0?mask?255.255.255.128
network?202.38.100.128?mask?255.255.255.128
Route filter
！MY_PREFIX
ip?prefix-list?MY_PREFIX?seq?10?permit?202.112.0.0/16
ip?prefix-list?MY_PREFIX?seq?20?permit?202.38.100.0/24
！MY_ASW_PREF?IX
ip?prefix-list?MY_ASW_PREFIX?seq?10?permit?202.38.100.0/24?le?25
！NEIGHBOR_ASW_PREFIX
ip?prefix-list?NEIGHBOR_ASW_PREFIX?seq?10?permit?210.25.255.0/24?le?24
Whole world route
access-list?3?permit?any
Can find out, utilize the communication of high performance address will be between autonomous territory A and the autonomous territory B, and use the communication of common address will pass through the Internet through privately owned interconnected.DVTS communication concurrent process less than 5 situation under, can guarantee service quality.
Autonomous territory A comprises backbone network management domain and Access Network management domain; Adopt static routing protocol between backbone network and the Access Network; But in order to implement the address switching architecture; Backbone network and Access Network all each self-configuring Internal BGP iBGP, and disposed corresponding iBGP route reflection server.Three layers of access control gateway in the autonomous territory, the routing configuration case of backbone network and Access Network is as shown in the table.
(1) routing configuration of the three layers of access control gateway router (202.112.36.33) in the subnet of a specific high-performance user (DVTS user) place in the Access Network
router?bgp?4538
！
neighbor?202.112.6.100?remote-as?4538
neighbor?202.112.6.100?prefix-list?MY_ASW?out
！
neighbor?166.111.255.211?remote-as?65531
neighbor?166.111.255.211?ebgp-multihop?30
neighbor?166.111.255.211?prefix-list?MY_ASW?out
！
ip?prefix-list?MY_ASW?seq?5?permit?202.38.100.0/24?le?30
(2) configuration of backbone network iBGP Router Reflector
router?bgp?4538
neighbor?202.112.36.33?remote-as?4538
neighbor?202.112.36.33?route-reflector-client
neighbor?202.112.36.33?prefix-list?MY_ASW_GW?in
ip?prefix-list?MY_ASW_GW?seq?5?permit?202.38.100.0/24?le?30
(3) Access Network BGP configuration
router?bgp?65531
neighbor?202.112.36.33?remote-as?4538
neighbor?202.112.36.33?ebgp-multihop?30
neighbor?202.112.36.33?prefix-list?MY_ASW_GW?in
ip?prefix-list?MY_ASW_GW?seq?5?permit?202.38.100.0/24?le?30
The case of the XML language description of striding autonomous territory network signal between three layers of soft switching server of autonomous territory A and the three layers of soft switching server of autonomous territory B is:
(1) when three layers of soft switching server of autonomous territory A during to three layers of soft switching server applications communication of autonomous territory B, the Softswitch transmission information of autonomous territory A does
<inter-as-nni>
< customer id=" 2001 ">// ID
</customer>
< order id=" 123456 ">// serial number
</order>
< metric name=" prefix " unit=" IPv4 ">// user's local terminal high performance address section
202.38.100.4/30
</metric>
< metric name=" max_bandwidth " unit=" Mbps ">// maximum bandwidth
30
</metric>
< metric name=" command ">// instruction
active
</metric>
</inter-as-nni>
The echo message of three layers of soft switching server of autonomous territory B is:
<inter-as-nni>
< customer id=" 2001 ">// ID
</customer>
< order id=" 123456 ">// serial number
</order>
< metric name=" prefix " unit=" IPv4 ">// user's local terminal high performance address section
210.25.255.128/30
</metric>
< metric name=" max_bandwidth " unit=" Mbps ">// maximum bandwidth
30
</metric>
< metric name=" command ">// instruction
active_confirm
</metric>
</inter-as-nni>
(2) when three layers of soft switching server of autonomous territory A when three layers of soft switching server of autonomous territory B finish communication, the Softswitch transmission information of autonomous territory A does
<inter-as-nni>
< customer id=" 2001 ">// ID
</customer>
< order id=" 123457 ">// serial number
</order>
< metric name=" prefix " unit=" IPv4 ">// user's local terminal high performance address section
202.38.100.4/30
</metric>
< metric name=" max_bandwidth " unit=" Mbps ">// maximum bandwidth
30
</metric>
< metric name=" command ">// instruction
release
</metric>
</inter-as-nni>
The echo message of three layers of soft switching server of autonomous territory B is:
<inter-as-nni>
< customer id=" 2001 ">// ID
</customer>
< order id=" 123457 ">// serial number
</order>
< metric name=" prefix " unit=" IPv4 ">// user's local terminal high performance address section
210.25.255.128/30
</metric>
< metric name=" max_bandwidth " unit=" Mbps ">// maximum bandwidth
30
</metric>
< metric name=" command ">// instruction
release_confirm
</metric>
</inter-as-nni>
Through generalized ribbon bandwidth reservation and address exchanging method in the address switching architecture of the present invention's description; Can guarantee in striding autonomous territory and autonomous territory, to have under the situation of a plurality of management domains and implement the address switching architecture; Guarantee the service quality and the fail safe of high-performance user, have the economic model of sustainable development simultaneously.
Claims (2)
1. RSVP and address exchanging method between the territory in the switching architecture of address is characterized in that, said method is in a plurality of management domains in two autonomous territories or an autonomous territory, to adopt under the reciprocity mutual contact mode situation to realize according to the following steps successively:
Step (1): initialization
Take need than the macroreticular bandwidth resources and require end-to-end quality of service and application service that fail safe guarantees is defined as the performance application service; The address definition that is used for the performance application service that from whole internet address space, divide, dynamic assignment is a high performance address, and all the other address definitions that are used to be connected into the Internet and the service of non-performance application are common IP address; Distribute high performance address for high-performance user in real time as required;
According to the building block of address exchanging method in the single autonomous territory, the Internet, pre-configured network infrastructure based on present Internet protocol is at three layers of soft switching server of each autonomous territory configuration; Three layers of access control gateway router of subnet configuration at the high-performance user place; The user who intends the service of application performance application uses enhancement type dynamic address user terminal;
Define the parameter of described performance application demand, comprise the network service zone at user's communication object place, opposite end, required bandwidth, corresponding service amount and needed time-delay, packet loss, shake are at interior Service Quality Metrics; Reserve the high performance address piece of some settings and bind mutually with the high performance demands parameter of setting;
Step 1.1: pre-configured network infrastructure based on present Internet protocol:
Step 1.1.1: between autonomous territory, set up privately owned interconnected peering,, carry out BGP route static, cluster to corresponding high performance address and announce for the high performance address piece is selected the cross-domain path of privately owned interconnected peering; Simultaneously, carry out the RSVP of selected cross-domain link through the COS strategy of configuration router; Corresponding three layers of soft switching server to two autonomous territories load link database respectively;
Step 1.1.2:, in autonomous territory, carry out the RSVP under extreme case for high performance address through the COS strategy of configuration router;
Step 1.1.3: all address three layers of access control gateway routers of exchange are set up neighborhood in the one or more router configuration Routing Protocol that each management domain in this autonomous territory is selected and this autonomous territory; When the high performance address dynamic assignment was given three layers of access control gateway router in this autonomous territory, the corresponding route of this high performance address just can be distributed on all routers of each management domain in this autonomous territory like this;
Step 1.2: three layers of soft switching server initialization:
User-network signal UNI and network-Network signaling NNI are set,, notify three layers of access control gateway router high performance address to be carried out control and treatment, the high performance address of notifying the user to use according to performance application request from the user; Behind the sign off, notify the user charging result, notify three layers of access control gateway router that high performance address is handled; Notify this high performance address to regain, upgrade Relational database;
Step 1.3: three layers of access control gateway router initialization:
Network-Network signaling NNI is set,, the high performance address of appointment is carried out interface configuration, route issue, port flow control according to notice from said three layers of soft switching server; When sign off,, cancel interface configuration, route issue, port flow control to this high performance address according to notice from said three layers of soft switching server;
Step 1.4: enhancement type dynamic address user terminal:
User-network signal UNI is set,, receives the high performance address of the appointment that distributes in the notice of said three layers of soft switching server, on this machine, dispose to said three layers of soft switching server application performance application service required address; Or receive from of the automatic configuration of three layers of access control gateway router to the high performance address of appointment; During sign off, notify said three layers of soft switching server, these three layers of soft switching servers are issued the user with charging result;
Network-Network signaling NNI form includes: ID, serial number, user's local terminal high performance address section, maximum bandwidth, the improper wait duration that withdraws from;
User-network signal UNI form includes: ID, serial number, the common address of user's local terminal, the common address of Correspondent Node, user's local terminal high performance address section, this application demand bandwidth of user, the improper wait duration that withdraws from;
Step (2): performance application is used in the high-performance user application
Step 2.1: when a certain high-performance user user a among the autonomous territory X need carry out high performance communication with a certain high-performance user user h among the autonomous territory Z, this user a will be through the said three layer soft switching server submit applications of user-network signal UNI to this autonomous territory;
Step 2.2: said three layers of soft switching server in this autonomous territory are through the identity of this user a of customer data base checking; Whether concurrent user's quantity of verifying this service on autonomous territory, the opposite end of asking and the corresponding fast autonomous territory link through link database does not reach upper limit N; Satisfy like above condition; Said three layers of soft switching server in this autonomous territory obtain a high performance address section dynamic assignment through address database and give this user a, communicate by letter with three layers of access control gateway router of this user a place subnet through network-Network signaling NNI simultaneously, transmit to comprise the high performance network address field; Maximum bandwidth, the improper wait duration that withdraws from is in interior parameter; If, then do not refuse said high performance service request, if the quantity of high-performance user of using this interconnected link is then also refused the request of this user a more than or equal to N through checking; Request once more after this user a will wait a period of time;
Step 2.3: said three layers of access control gateway router obtain comprising the high performance address of dynamic assignment from said three layers of soft switching server; Maximum bandwidth that allows and the improper duration that withdraws from are in interior parameter; Be configured to said high performance address on the equipment interface that links to each other with this high-performance user place subnet, and this interface carried out flow restriction according to the bandwidth of maximum permission; The neighborhood of three layers of access control gateway routers foundation of all addresses exchanges in the one or more router of selecting through each management domain in this pre-configured autonomous territory and this autonomous territory is published to the route of the high performance address section of dynamic assignment on the path in each management domain; Said three layers of access control gateway router start the improper timing of withdrawing from;
Step 2.4: three layers of soft switching server in autonomous territory, network-Network signaling opposite end, autonomous territory are striden in said three layers of soft switching server utilization in this autonomous territory, and transmission parameters is: the ID h of opposite end, serial number, local terminal high performance address section, maximum bandwidth, the improper wait duration that withdraws from;
Step 2.5: three layers of soft switching server in autonomous territory, opposite end; Identity through customer data base checking user h; Whether concurrent user's quantity of verifying this service on autonomous territory, the opposite end of asking and the corresponding fast autonomous territory link through link database does not reach upper limit N, satisfied like above condition, and said three layers of soft switching server in this autonomous territory obtain a high performance address section dynamic assignment to this user h through address database; Communicate by letter with three layers of access control gateway router of this user h place subnet through network-Network signaling NNI simultaneously; Transmission comprises the high performance network address field, maximum bandwidth, and the improper wait duration that withdraws from is in interior parameter; If, then do not refuse said high performance service request, if the quantity of high-performance user of using this interconnected link is then also refused the request of this user h more than or equal to N through checking; Then notify three layers of soft switching server in the autonomous territory of local terminal;
Step 2.6: three layers of access control gateway router of said opposite end obtain comprising the high performance address of dynamic assignment from three layers of soft switching server of said opposite end; Maximum bandwidth that allows and the improper duration that withdraws from are in interior parameter; Be configured to high performance address on the equipment interface that links to each other with high-performance user place subnet, and this interface carried out flow restriction according to the bandwidth that maximum allows; All addresses exchange three layers of access control gateway router and set up neighborhood in the one or more router of selecting through each management domain in this pre-configured autonomous territory and this autonomous territory, are published to the route of the high performance address section of dynamic assignment on the path in each management domain; Said three layers of access control gateway router start the improper timing of withdrawing from;
Step 2.7: three layers of access control gateway router of said local terminal notify three layers of soft switching server configuration of said local terminal to accomplish; The three layers of access control gateway router in this opposite end notify the three layers of soft switching server configuration in this opposite end to accomplish; The three layers of soft switching server in this opposite end notify said local terminal three layers of soft switching server through striding autonomous territory network-Network signaling NNI, and the three layers of soft switching server in local terminal and opposite end start the improper timing of withdrawing from;
Step 2.8: high-performance user a and high-performance user h obtain high performance address, use performance application through high performance address; Because this sector address has reserved bandwidth, distribute through authentication simultaneously, just guaranteed the service quality QoS of two-way communication and the authenticity of bidirectional traffics fully;
Step (3): high-performance user finishes to use performance application
Step 3.1: behind the high performance communication of user a completion and user h; Notify three layers of soft switching server in this autonomous territory through user-network signal UNI, send ending message;
Step 3.2: three layers of soft switching server in said autonomous territory reclaim corresponding high performance address, notify corresponding three layers of access control gateway router to revise configuration through network-Network signaling NNI;
Step 3.3: three layers of soft switching server that the autonomous territory of autonomous territory said network-Network signaling NNI notice opposite end is striden in three layers of soft switching server utilization in this autonomous territory finish high performance communication;
Step 3.4: three layers of access control gateway router in this autonomous territory stop the network interface configuration of corresponding high performance address, flow control configuration and route distribution, and the routing iinformation of temporarily distributing to the high performance address section of user a in this autonomous territory disappears;
Step 3.5: three layers of access control gateway router in autonomous territory, opposite end stop the network interface configuration of corresponding high performance address; Flow control configuration and route distribution are distributed to the high-performance of user h, the routing iinformation disappearance that prefix length is 30 address fields temporarily in the autonomous territory, opposite end;
Step 3.6: three layers of soft switching server of local terminal stop to charge; Notifying corresponding high-performance user based on the charging result of bandwidth and time product; The updating user data storehouse; Address database and billing database, this section high performance address section discharges, and waits for that distributing to next requesting users uses;
Step 3.7: the three layers of soft switching server in opposite end, the updating user data storehouse, address database and billing database, this section high performance address section discharges, and waits for that distributing to next requesting users uses.
2. RSVP and address exchanging method between the territory in the switching architecture of address according to claim 1; It is characterized in that; In said step 1.1.3, according to circumstances preferential Internal BGP (iBGP) or multi-hop External BGP (eBGP multihop) or the interior routing protocol (IGP) of selecting to be used for the route reflection server.
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| CN101286921A (en) * | 2007-05-16 | 2008-10-15 | 清华大学 | User-oriented cross-domain network route selection method from terminal to terminal in Internet |
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| CN101083560A (en) * | 2007-07-05 | 2007-12-05 | 中兴通讯股份有限公司 | Method and system for measuring network service quality and media gateway controller |
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