CN100440861C

CN100440861C - Resource application method for service quality in IP network

Info

Publication number: CN100440861C
Application number: CNB2005100766416A
Authority: CN
Inventors: 孙宏跃
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2005-06-13
Filing date: 2005-06-13
Publication date: 2008-12-03
Anticipated expiration: 2025-06-13
Also published as: CN1881930A

Abstract

The present invention discloses resource request method for service quality in an IP network, which is applied to a DiffServ network. After a resource request solid receives the resource request of a service flow, a resource reservation request report is selected and transmitted to a BCF network resource management solid, and a respond waiting timer is opened. After each BCF receives the request report, the request report is accepted and judged. The resource reservation response report is returned when the request report can be accepted, and a waiting confirmation timer is opened. The resource request solid receives the response report before the response waiting timer reaches the time, and a BCF meeting service requirements is selected and transmits the resource reservation confirmation report. The BCF receives the resource reservation confirmation report before the waiting confirmation timer reaches the time, the reserved QoS resource is formally allocated to the service flow, otherwise the reserved QoS resource is released. The present invention enables the resource management solid to finish the QoS resource request and the QoS channel selection based on the resource use conditions of the terminal.

Description

The resource application method of service quality in a kind of IP network

Technical field

The QoS (service quality) that the present invention relates to IP network realizes, relate in particular to a kind of in DiffServ (differential service) network the resource application method of QoS.

Background technology

Because the IP network design defect, its in advance design object just provide a kind of single type of doing one's best data transport service.For correctness how to guarantee transfer of data and reliability, finish by upper-layer protocol fully.But the QoS resource bid meeting based on Routing Protocol causes offered load unbalanced fully, causes the localized network congestion phenomenon.

For the professional ability that can provide multiple QoS to guarantee on existing IP network, people have proposed that existing IP network is carried out QoS and have transformed.QoS for existing network transforms model, and two kinds of pattern: InterServ (integrated service) and DiffServ (differential service) are arranged.

At present, under the DiffServ framework, when (differential service territory:, a DS territory DS region) with the interconnection of a plurality of DS territory, perhaps between a plurality of DS zone (DS domain) of inside, a DS territory, still only rely on static configuration to solve the routing problem in Business Stream QoS resource reservation and DS territory (or DS zone) between the QoS management entity, can not finish the QoS resource reservation and the network routing of Business Stream real-time dynamicly based on DS territory, opposite end resource operating position.

Summary of the invention

The problem to be solved in the present invention provides the resource application method of service quality in a kind of IP network, is applied in the DiffServ network, makes resource management entity can finish the QoS resource bid of this Business Stream based on the resource operating position of opposite end.

In order to solve the problems of the technologies described above, the present invention proposes the resource application method of service quality in a kind of IP network, may further comprise the steps:

(a) after the resource request entity is received the resource request of Business Stream, send resource reservation application message to chosen network resource management entity, and open the wait-for-response timer, comprise the sign and the needed service quality resource of this business of this resource request entity and this Business Stream in this application message;

(b) after each network resource management entity is received request message, carry out admission judgment according to the sign of present networks resource situation, described Business Stream and the resource of needs thereof, if can admit, then send the resource reservation response message to described resource request entity, and open the wait acknowledge timer, comprise present networks resource management entity sign in the response message, the service quality resource of affirmation and the sign of described Business Stream;

(c) if described resource request entity is received the resource reservation response message that returns at the wait-for-response timer then, the service quality resource of then choosing an affirmation satisfies the network resource management entity of business need, send the resource reservation confirmation message to it, otherwise, this resource request failure finishes;

(d) if the network resource management entity that has sent the resource reservation response message is receiving that the wait acknowledge timer then before receives the resource reservation confirmation message, then the service quality resource of reserving is formally distributed to described Business Stream, otherwise the service quality resource of reserving is discharged.

Further, said method can have following characteristics: described resource request entity is a Policy Enforcement Point.

Further, said method can have following characteristics: described chosen network resource management entity is the network resource management entity in other differential service territories and/or is the network resource management entity of zones of different in the same differential service territory.

Further, said method can have following characteristics: in the described step (a), the resource request entity is to send described resource reservation application message with the all-network resource management entity of multicast mode in a multicast group, and the all-network resource management entity place network that adds this multicast group can transmit this Business Stream.

Further, said method can have following characteristics: described resource request entity and network resource management entity identification are all represented with its IP address.

Further, said method can have following characteristics: in the described step (b), also comprise the sign of the network that selected resource is provided in the resource reservation response message.

Further, said method can have following characteristics: in the described step (c), if described resource request entity is received when the service quality resource of confirming in plural resource reservation response message and the message all satisfies business need, then therefrom select the network resource management entity of an optimum according to the competition algorithm of configuration.

Further, said method can have following characteristics: described resource is asked entity for instructions and is provided with a desired value in advance, in the described step (c), if the wait-for-response timer then before, described resource is asked entity for instructions and is judged that the response message number of receiving has surpassed this desired value, can directly begin to choose the operation of network resource management entity.

Further, said method can have following characteristics: in the described step (b), if after the network resource management entity is received request message, judgement can not be admitted, and then this network resource management entity is not done subsequent treatment.

As from the foregoing, utilize the inventive method, when making a Business Stream in the face of a plurality of optional DS territories or DS zone, can carry out Business Stream QoS resource reservation and QoS routing according to the QoS resource situation that the opposite end resource management entity provides, solved well under the DiffServ framework, during a DS territory and a plurality of DS territory interconnection, perhaps the QoS resource reservation and the QoS routing problem of Business Stream between inner a plurality of DS zone, a DS territory.

Description of drawings

Fig. 1 is the structural representation of diffserv network.

Fig. 2 carries out resource reservation interactive signaling flow chart between embodiment of the invention resource request entity and the network resource management entity (BCF).

Fig. 3 is a mutual detail flowchart between embodiment of the invention resource request entity and the network resource management entity.

Fig. 4 is the flow chart that the resource request entity carries out resource request and affirmation among Fig. 3.

Fig. 5 is the flow chart that the network resource management entity carries out resource allocation among Fig. 3.

Embodiment

The networking schematic diagram of diffserv network shown in Figure 1, the DS territory is made up of a plurality of DS zone among the figure.Each DS zone should be after network internal a unique identification number, DS area identification sphere of action is only in inside, DS territory.Each corresponding BCF in DS zone, and a DS territory also can the interior BCF of a corresponding DS territory scope.In the system of present embodiment, the resource request entity is Policy Enforcement Point (PEP), but the present invention is not limited to this, also can be that strategic decision-making layer or other are finished the entity of this function.

In the present embodiment, the resource management entity (BCF) in a plurality of DS territory or DS zone is joined in the multicast group.Like this, receive the resource request signaling of Business Stream as PEP, just can send resource preliminery application message to the BCF in these DS territories or DS zone by the multicast mode, the resource reservation response message that returns from the opposite end is learnt its resource operating position, finish the QoS resource bid and the QoS routing of this Business Stream, send the resource reservation confirmation message to selected BCF then.As shown in Figure 2.

Fig. 3 shows the detailed process of this resource application method, may further comprise the steps:

Step 210, after PEP receives the resource request of Business Stream, (present embodiment is all BCF that add a multicast group to the BCF of chosen network, all BCF place networks can be as the network that transmits this Business Stream in the multicast group) send resource reservation application multicast message, open a wait-for-response timer then, the information that this message carries comprises: PEPID, FlowID and QoS Proflie etc.;

The PEPID:PEP sign, being used for identifying is the resource bid flow process that is sent by which PEP, can identify with the IP address of PEP.

FlowID: traffic stream identifier, be used for representing that this time the resource of application is to be which traffic stream service, can represent with the five-tuple of Business Stream.

QoS Profile: be used for representing the needed network QoS resource of Business Stream, according to the requirement in the business application resource signaling and this locality the resource allocation policy of this Business Stream determined by PEP.

Here, not getting rid of PEP adopts mode of unicast to send the application message to selected BCF.

Step 220, after each BCF receives multicast message, according to FlowID in the multicast message and QoSProflie parameter and present networks resource operating position, adopt the access control algorithm of configuration, request inserts and carries out admission judgment to QoS, if network can be accepted the QoS request of the Business Stream that PEP reports at that time, carry out next step; Otherwise this BCF is left intact, and finishes the handling process on this BCF;

Step 230 allows the BCF that admits to give the Business Stream reserved resource of this request resource, and sends unicast QoS resource reservation response message to the PEP of correspondence, opens the wait acknowledge timer then, and this message comprises following information:

The BCF sign:, which BCF is used for representing is, can identify with the IP address of BCF.

QoS Profile Ack: expression is to the QoS resource of request, the resource situation that BCF confirms.

NetID: expression provides the sign of the network of selected resource.

FlowID: expression traffic stream identifier.

Step 240, PEP waits for and receives the resource reservation response message that returns, if timer is not received the resource reservation response message then, carries out next step, otherwise, execution in step 260; PEP can establish earlier in this step of desired value, if the response message number that the then preceding PEP of timer receives surpasses this desired value, directly execution in step 260, to quicken processing.

Step 250 illustrates that current selected network all is in the network congestion state, does not have resource to carry out new business QoS and inserts, and this resource request failure finishes;

Step 260, PEP chooses a BCF from the BCF response that receives, send unicast QoS resource reservation confirmation message to selected BCF then, and this message comprises: parameters such as FlowID, QoS Profile, PEP sign;

When choosing, PEP judges earlier whether the Qos resource of distributing to business that BCF returns can be accepted by business, if can not satisfy business need, abandon this BCF response, under the situation that can satisfy business need, if PEP receives the resource reservation response message of a BCF, this network comes out with regard to selected so.If PEP receives the resource reservation response message of two above BCF, need select an optimal network according to the competition algorithm.

Under routing situation between the territory, can take all factors into consideration Qos resource and routing condition, select the network of an optimum.

Step 270, the BCF that has returned the resource reservation response message judges whether receive the QoS resource reservation confirmation message that PEP sends before the wait acknowledge timer expiry, if receive, carries out next step, if do not receive, execution in step 290;

Step 280, BCF formally distributes to corresponding business stream to the QoS resource of reserving, and Business Stream can be initiated the data flow communication to this BCF place network, finishes.

Step 290 discharges the QoS resource of reserving, and this resource bid finishes;

Embodiment of the invention PEP being shown separately respectively among Fig. 4 and Fig. 5 carrying out the flow process of resource request and affirmation and the flow process that BCF carries out resource and admission and distribution, is consistent with above-mentioned flow process, does not repeat them here.

In 3G network was built, GGSN internal logic entity PEP was when the QoS request that receives a Business Stream, and in order to guarantee quality of service requirement under the externally network operation situation of business, GGSN will carry out resource reservation request to external network ExtNet.Its resource request flow process just can adopt the application process of mentioning herein.Certainly, when the QoS of actual DiffServ pattern resource bid, also can adopt mode that this paper carries to carry out with regard to professional resource reservation mode of carrying out between the different DiffServ region resource management entities.

Claims

1, the resource application method of service quality in a kind of IP network may further comprise the steps:

(a) after the resource request entity is received the resource request of Business Stream, send resource reservation application message to chosen network resource management entity, and open the wait-for-response timer, comprise the sign and the needed service quality resource of this Business Stream of this resource request entity and this Business Stream in this application message;

(b) after each network resource management entity is received described resource reservation application message, carry out admission judgment according to the sign of present networks resource situation, described Business Stream and the service quality resource of needs thereof, if admit, then send the resource reservation response message to described resource request entity, and open the wait acknowledge timer, comprise present networks resource management entity sign in the described resource reservation response message, the service quality resource of affirmation and the sign of described Business Stream;

(d) then before receive the resource reservation confirmation message if sent the network resource management entity of resource reservation response message at the wait acknowledge timer, then the service quality resource of reserving is formally distributed to described Business Stream, otherwise the service quality resource of reserving is discharged.

2, the method for claim 1 is characterized in that, described resource request entity is a Policy Enforcement Point.

3, the method for claim 1 is characterized in that, the network resource management entity that described chosen network resource management entity is other differential service territories and/or be the network resource management entity of zones of different in the same differential service territory.

4, the method for claim 1, it is characterized in that, in the described step (a), the resource request entity is to send described resource reservation application message with the all-network resource management entity of multicast mode in a multicast group, and the all-network resource management entity place network that adds this multicast group can both transmit this Business Stream.

5, the method for claim 1 is characterized in that, described resource request entity and network resource management entity identification are all represented with its IP address.

6, the method for claim 1 is characterized in that, in the described step (b), also comprises the sign of the network that selected resource is provided in the described resource reservation response message.

7, the method for claim 1, it is characterized in that, described resource request entity is provided with a desired value in advance, in the step (c), if the wait-for-response timer then before, described resource request entity judges that the resource reservation response message number of receiving has surpassed this desired value, promptly directly begins to choose the operation of network resource management entity.

8, the method for claim 1 is characterized in that, in the described step (b), if behind the resource reservation application message that the network resource management entity is received, judgement can not be admitted, then this network resource management entity is not done subsequent treatment.