CN102904837A - Differentiated service survivability method based on virtual service plane - Google Patents
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Abstract
Provided is a differentiated service survivability method based on a virtual service plane. Firstly services are divided into six classes according to a service classification method; then a logical net is built on a physical network and the virtual service plane is constructed according to quality of service (QoS) requests and topology requirements of various services on the network; obligating resources on the virtual service plane constructed according to service types and conducting instantiation on the virtual service plane; distributing resources for each service on the virtual service plane according to service flow and achieving resource dynamic adjustment on the virtual service plane; and finally designing different survivability strategies on the virtual service plane according to survivability needs of different services and providing survivability guarantees for different services. The differentiated service survivability method based on the virtual service plane can meet the QoS requests of different services, meet needs of the different services on the different services, meets survivability needs of the different services, further improve resource utilization rate of a network, and further improve survivability guarantees of the network on the different services.
Description
Technical field:
The invention belongs to computer network field, mainly solve the survivability problem of different business in the IP network, be specifically related to the survivability method that a kind of business for having different QoS requirement and topological demand provides differentiated service.
Background technology:
Along with the development of IP network, continue to bring out out some new business in the IP network, these new business have different QoS requests, but existing IP network can only provide the service of doing one's best, and can not guarantee professional QoS request; And the appearance that Streaming Media etc. are professional also has special requirement to network topology, but the topology of current network fix, can not satisfy different business to the different demands of topology, namely existing IP network can not satisfy the QoS request of different business and to the demand of network topology.
IP network is distributed network, in hop by hop mode as service computation route, Resources allocation, can not guarantee professional QoS attribute, therefore, Stanford University proposes the OpenFlow project, the centralized control server is provided in network, under the condition of understanding full mesh topology, be service computation route, Resources allocation, but the node processing of this project is limited in one's ability, can not expand in the large-scale network, namely existing IP network can not be understood full mesh topology, even the OpenFlow technology is understood full mesh topology, can not support large scale network.
Different business has different demands to network survivability in the IP network, different Survivability Strategies have different attributes, if the Survivability Strategy needs that satisfy than the high survivability demand consume more Internet resources, simultaneously, IP network can not design different Survivability Strategies by differentiated service, can not satisfy the survivability demand of different business, can not improve the resource utilization of network, namely existing IP network can not provide the Survivability Strategy of differentiated service.
In sum, in order to improve the resource utilization of network, satisfy the QoS request of different business and different demands to network topology, design the survivability assurance that different Survivability Strategies provides differentiated service, the present invention proposes a kind of differentiated service survivability method based on the virtual service plane.The method arranges the distributed central control server cluster in IP network, business is divided into 6 classes, on the basis of understanding full mesh topology, set up different logical network based on the different business kind, make up corresponding virtual service plane, professional QoS request and professional demand to network topology can be satisfied in different virtual service planes, be Resources allocation instantiation virtual service plane, virtual service plane again, service based stream is the service dynamic Resources allocation on the virtual service plane after the instantiation, and design different Survivability Strategies, guarantee the survivability demand of different business.
Summary of the invention:
The present invention proposes a kind of differentiated service survivability method based on the virtual service plane in order to address the above problem, and the particular content of this invention is as follows:
At first, the present invention proposes a kind of professional sorting technique, for the business of ITU-T definition, according to these professional QoS demands, business is classified.Consider that professional requirement to time delay is respectively Millisecond, second level, Three Estate without any requirement, requirement to packet loss is divided into the certain packet loss of permission and does not allow two classifications of any packet loss, second, a level delay requirement can be further divided into again greater than 10 seconds with less than 10 seconds two grades, and business is divided into 6 classes.The first kind is delay requirement Millisecond, the business that allows certain packet loss; Equations of The Second Kind is delay requirement Millisecond, the business that does not allow any packet loss; The 3rd class is time delay less than 10 seconds Millisecond, does not allow the business of any packet loss; The 4th class is that time delay is less than 10 seconds Millisecond, the business of the certain packet loss of permission; The 5th class is the business that requires greater than 10 seconds second level time delay; The 6th class is the business that QoS is had no requirement;
Secondly, the present invention proposes a kind of distributed central control framework, concrete, it is exactly configuring distributed centralized control server cluster in IP network, the distributed central control server cluster arranges the centralized control server at the diverse location of network, interconnect between the centralized control server, mutually share data, the centralized control and management function is provided.
Again, the present invention proposes the differentiated service survivability framework based on the virtual service plane, and based on the differentiated service survivability flow process on virtual service plane, particular content is as follows:
[101] the differentiated service survivability framework based on the virtual service plane is based upon on distributed central control server cluster and the physical IP network, by the centralized control and management of distributed central control device cluster realization to network;
[102] the distributed central control server cluster gets QoS request and to the demand of network topology, sets up logical network at the IP physical network according to different business, makes up the virtual service plane.The QoS attribute of different business is not only satisfied on constructed virtual service plane, also satisfies different business to the demand of network topology;
[103] under the control and management of distributed central control server cluster, the service based classification is virtual service plane Resources allocation, instantiation virtual service plane;
[104] be the different kinds of business calculating path based on stream on the virtual service plane, Resources allocation is guaranteeing under the professional QoS prerequisite Optimizing Network Resources;
[105] on the virtual service plane according to the survivability demand of different business, the design Survivability Strategy comprises self-healing mechanism, fault self-diagnosis and location mechanism, dynamic processing capacity allocation policy etc.;
At last, the differentiated service survivability method application network virtual method based on the virtual service plane that the present invention proposes is realized the structure on virtual service plane, under the control and management of distributed central control device cluster, realizes the survivability method of differentiated service.
The invention has the beneficial effects as follows: for different service types design Survivability Strategy, guarantee that all kinds of business are to the requirement of QoS; Simultaneously, after breaking down in the network, quick-recovery is subjected to fault effects professional soon, makes to be subjected to the fault effects business to be in user's acceptable level.By different business is used different Survivability Strategies, guaranteeing to improve the resource utilization of network under the professional condition to QoS and survivability demand.
Description of drawings:
Fig. 1 is the deployment form of distributed central control device cluster in network;
Fig. 2 is for commenting the differentiated service survivability framework of face based on virtual service;
Fig. 3 is the flow chart based on the differentiated service survivability method on virtual service plane;
Fig. 4 is the structure schematic diagram based on the virtual service plane of distributed central control device cluster.
Embodiment:
In order to make the present invention's carry more than you know based on the differentiated service survivability method on virtual service plane, below in conjunction with specific embodiment the present invention is further elaborated.
The present invention at first classifies to business:
When interactive voice and visual telephone business arrival network, the professional sorting technique of carrying according to the present invention, these business are divided into first kind business, because first kind business is Millisecond to the delay requirement of network, can tolerate certain packet loss, the present invention's carry based on the differentiated service survivability framework on virtual service plane in application distribution Centralized Controller cluster, on the basis of understanding the physical IP network topology, select link and the strongest node of node processing ability of time delay minimum to set up mesh network topologies, make up the virtual service plane, and be that resource is reserved on this virtual service plane, guarantee the QoS request of first kind business.Simultaneously; consider the type business having relatively high expectations to time delay; at the fault self-diagnosis and the location mechanism that are the professional virtual service plane design service-oriented that makes up of the first kind; minimum tolerance parameter is set; minimize the fault diagnosis and location time; use again the mesh network wrap protection, short protection switch time is provided, guarantee for the type business provides survivability.
Work as Telnet, order/control signal, during the professional arrival of interactive game network, the professional sorting technique of carrying according to the present invention, these business are divided into the Equations of The Second Kind business, because the Equations of The Second Kind business is Millisecond to the delay requirement of network, and can't stand any packet loss is arranged in the network, therefore, the present invention's carry based on the differentiated service survivability framework on virtual service plane in application distribution Centralized Controller cluster, on the basis of understanding the physical IP network topology, select link and the strongest node of node processing ability of time delay minimum to set up the loop network topology, make up the virtual service plane, and be that resource is reserved on this virtual service plane, guarantee the QoS request of Equations of The Second Kind business.Simultaneously; according to the demand of Equations of The Second Kind business to QoS; at the fault self-diagnosis and the location mechanism that are the professional virtual service plane design service-oriented that makes up of Equations of The Second Kind; minimum tolerance parameter is set; minimize the fault diagnosis and location time, use again the ring network wrap protection, short protection switch time is provided; and to satisfy packet loss be 0 requirement, guarantees for the type business provides survivability.
Transaction services when high priority, such as ecommerce, when ATM E-mail business professional and access server side arrives network, the professional sorting technique of carrying according to the present invention, these business are divided into the third window, because the third window be less than second of 10 seconds grade to the delay requirement of network, and can't stand any packet loss is arranged in the network, therefore, the present invention's carry based on the differentiated service survivability framework on virtual service plane in application distribution Centralized Controller cluster, on the basis of understanding the physical IP network topology, select less link and the stronger node of node processing ability of time delay to set up the loop network topology, make up the virtual service plane, and be that resource is reserved on this virtual service plane, guarantee the QoS request of the third window.Simultaneously, according to the demand of the third window to QoS, fault self-diagnosis and location mechanism at the virtual service plane design service-oriented that makes up for the third window, less tolerance parameter is set, reduce the fault diagnosis and location time, use again the ring network Restoration Mechanism, satisfying on the basis of service delay, satisfy packet loss and be 0 requirement, guarantee for the type business provides survivability.
Work as voice messaging, the high quality stream audio frequency, when the one-way video demand (telecommunication) service arrives network, the professional sorting technique of carrying according to the present invention, it is professional that these business are divided into the 4th class, because the 4th class business be less than second of 10 seconds grade to the delay requirement of network, and can certain packet loss appear tolerant network, therefore, the present invention's carry based on the differentiated service survivability framework on virtual service plane in application distribution Centralized Controller cluster, on the basis of understanding the physical IP network topology, select general link and the stronger node of node processing ability of time delay to set up mesh network topologies, make up the virtual service plane, and be that resource is reserved on this virtual service plane, guarantee the QoS request of the 4th class business.Simultaneously, according to the demand of the 4th class business to QoS, at the fault self-diagnosis and the location mechanism that are the professional virtual service plane design service-oriented that makes up of the 4th class, less tolerance parameter is set, reduce the fault diagnosis and location time, use again the mesh network Restoration Mechanism, satisfy professional requirement to time delay and packet loss, guarantee for the type business provides survivability.
When the Large Volume Data transmission, the still image transmission, E-mail transfer of data between the server, fax, during the professional arrival such as low priority affairs network, the professional sorting technique of carrying according to the present invention, it is professional that these business are divided into the 5th class, because the 5th class business be greater than second of 10 seconds grade to the delay requirement of network, and packet loss that can tolerant network is less, therefore, the present invention's carry based on the differentiated service survivability framework on virtual service plane in application distribution Centralized Controller cluster, on the basis of understanding the physical IP network topology, select general link and the general node of node processing ability of time delay to set up mesh network topologies, make up the virtual service plane, and be that resource is reserved on this virtual service plane, guarantee the QoS request of the 5th class business.Simultaneously, according to the demand of the 5th class business to QoS, at the fault self-diagnosis and the location mechanism that are the professional virtual service plane design service-oriented that makes up of the 5th class, less tolerance parameter is set, reduce the fault diagnosis and location time, use again the mesh network Restoration Mechanism, satisfy professional requirement to time delay and packet loss, guarantee for the type business provides survivability.
When the professional arrival of Usenet network, the professional sorting technique of carrying according to the present invention, it is professional that these business are divided into the 6th class, because the 6th class business does not have qos requirement, therefore provides the service of doing one's best in the IP network road.
So far, based on the differentiated service survivability method on virtual service plane the business of ITU-T definition is divided into six classes, as shown in table 1.Make up the virtual service plane for different classs of service, guarantee professional QoS request and to the requirement of network topology, be virtual service plane Resources allocation, instantiation virtual service plane, and at the fault self-diagnosis of the virtual service plane that successfully constructs design differentiated service and location mechanism, different self-healing mechanism, be service computation route, Resources allocation based on stream, guarantee for different business provides survivability, realize the survivability method of differentiated service.
Table 1 is based on the professional business classification of ITU-T definition
Secondly, the present invention proposes a kind of distributed central control framework, concrete, it is exactly configuring distributed centralized control server cluster in IP network, the distributed central control server cluster arranges the centralized control server at the diverse location of network, interconnects between the centralized control server, mutually shares data, provide the centralized control and management function, as shown in Figure 1.
Again, the present invention proposes the differentiated service survivability framework based on the virtual service plane, and as shown in Figure 2, based on the differentiated service survivability flow process on virtual service plane as shown in Figure 3, particular content is as follows:
[101] the differentiated service survivability framework based on the virtual service plane is based upon on distributed central control server cluster and the physical IP network, by the centralized control and management of distributed central control device cluster realization to network;
[102] the distributed central control server cluster gets QoS request and to the demand of network topology, sets up logical network at the IP physical network according to different business, makes up the virtual service plane.The QoS attribute of different business is not only satisfied on constructed virtual service plane, also satisfies different business to the demand of network topology;
[103] under the control and management of distributed central control server cluster, the service based classification is virtual service plane Resources allocation, instantiation virtual service plane;
[104] be the different kinds of business calculating path based on stream on the virtual service plane, Resources allocation is guaranteeing under the professional QoS prerequisite Optimizing Network Resources;
[105] on the virtual service plane according to the survivability demand of different business, the design Survivability Strategy comprises self-healing mechanism, fault self-diagnosis and location mechanism, dynamic processing capacity allocation policy etc.;
At last, the differentiated service survivability method application network virtual method based on the virtual service plane that the present invention proposes is realized the structure on virtual service plane, under the control and management of distributed central control device cluster, realizes the survivability method of differentiated service.
Claims (3)
1. the differentiated service survivability method based on the virtual service plane is characterized in that, comprises the steps:
1) professional classification: for the business of ITU-T definition, according to these professional QoS demands, business is classified;
2) set up the distributed central control framework:
Configuring distributed centralized control server cluster in IP network, the distributed central control server cluster arranges the centralized control server at the diverse location of network, interconnect between the centralized control server, mutually share data, the centralized control and management function is provided;
3) foundation is specially based on the differentiated service survivability framework on virtual service plane:
[101] the differentiated service survivability framework based on the virtual service plane is based upon on distributed central control server cluster and the physical IP network, by the centralized control and management of distributed central control device cluster realization to network;
[102] the distributed central control server cluster gets QoS request and to the demand of network topology, sets up logical network at the IP physical network according to different business, makes up the virtual service plane;
[103] under the control and management of distributed central control server cluster, the service based classification is virtual service plane Resources allocation;
[104] on the virtual service plane, be different kinds of business calculating path, Resources allocation based on stream;
[105] on the virtual service plane according to the survivability demand of different business, the design Survivability Strategy.
2. method according to claim 1, it is characterized in that, described step 1) in: according to business the requirement of time delay is respectively Millisecond, second level, Three Estate without any requirement, requirement to packet loss is divided into the certain packet loss of permission and does not allow two classifications of any packet loss, second, a level delay requirement can be further divided into again greater than 10 seconds with less than 10 seconds two grades, and business is divided into 6 classes: the first kind is delay requirement Millisecond, the business that allows certain packet loss; Equations of The Second Kind is delay requirement Millisecond, the business that does not allow any packet loss; The 3rd class is time delay less than 10 seconds Millisecond, does not allow the business of any packet loss; The 4th class is that time delay is less than 10 seconds Millisecond, the business of the certain packet loss of permission; The 5th class is the business that requires greater than 10 seconds second level time delay; The 6th class is the business that QoS is had no requirement.
3. method according to claim 1, it is characterized in that: in the described step [105], Survivability Strategy comprises draws together self-healing mechanism, fault self-diagnosis and location mechanism and dynamic processing capacity allocation policy.
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