CN100581160C

CN100581160C - System and method for finishing service transmission in virtual switching system

Info

Publication number: CN100581160C
Application number: CN200410083760A
Authority: CN
Inventors: 陈悦鹏; 吴登超; 范灵源; 薛莉莉; 邹婷; 庆武; 廖月明
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2004-10-19
Filing date: 2004-10-19
Publication date: 2010-01-13
Anticipated expiration: 2024-10-19
Also published as: CN1764180A

Abstract

The invention discloses a system to complete business transmission in virtual exchange system, which comprises: independent business control layer devices, connection control layer device, and bearing capacity layer device. Wherein, when receiving call demand of calling user, the business control layer sends the demand information to the first VSC on connection control layer; the first VSC transfers the information by inferior VSC till the objective VSC of called user; the objective VSC and first VSC and other VSC between them in self governmental bearing capacity layer zone configures bandwidth and select DRE; the selected DRE sends data flow from calling user to called user. This invention reduces demand to treatment capacity of bearing device, and convenient to manage the devices.

Description

A kind of professional system for transmitting and method in virtual exchange system, finished

Technical field

(Virtual Switch, V-Switch) technology particularly relate to a kind of professional system for transmitting and method finished in virtual exchange system to the present invention relates to empty exchange.

Background technology

The V-Switch architecture possesses perfect exchange of Ethernet Virtual Local Area Network and scheduling feature, the means of service dispatching and foundation, adjustment flexibly, and abundant and extendible two layer service providing capabilities, perfect oam instrument and information.Therefore, the V-Switch system is widely used in providing the scheduling of EVPL service, the service of Ethernet VLAN, ethernet circuit service of simulation and operator's Ethernet service etc.

Professional transmission course once complete in the V-Switch system comprises: calling subscriber and called subscriber connect by signaling flow; Calling subscriber and called subscriber pass through the transmitting data stream that is connected set up.

Fig. 1 is the model structure schematic diagram of V-Switch system.Referring to Fig. 1, the model structure of V-Switch system logically is divided into service control layer, connects key-course and bearing capacity layer.In the practical business of prior art was realized, service control layer was physical equipment independently, is mainly professional control registration (SCR) equipment, and the load bearing equipment that connection key-course and bearing capacity layer then are integrated in same physics is on the empty switching equipment VS.

Fig. 2 is that prior art is set up the flow chart that the calling subscriber is connected with the called subscriber in the V-Switch system.Referring to Fig. 2, in the prior art, in the V-Switch system, set up the detailed process that is connected between calling subscriber and the called subscriber and may further comprise the steps by signaling flow:

To be 80008001 calling subscriber set up from self to number by the VS1 under the request self of UNS signaling is that 80006001 called subscriber's Local Area Network connects professional for step 201, number.

Here, the example that calling number 80008001 and called number 80006001 are just enumerated for convenience of description that is to say that calling number and called number can be other numbers.

Step 202, VS1 specify this professional QoS (QoS) to require and the bandwidth parameter requirement by the calling authority that inquiry business key-course equipment SCR verifies the calling subscriber then.

Step 203, VS1 search the routing iinformation of called number 80006001, and next the jumping load bearing equipment that obtains this LAN connection is VS2, reserves the resource of the LAN interface of VS1 inside from calling subscriber to VS2 then.

Step 204, VS1 are sent PATH message among the signaling mechanism RSVP to VS2, carry caller and called E164 address, self port record and this professional parameter such as bandwidth/qos requirement that are connected in this PATH message.

Step 205, VS2 with interface that VS1 links to each other on receive PATH message after, search the routing iinformation of called number 80006001, next the jumping load bearing equipment that obtains this LAN connection is VS3, reserves the resource that go out LAN interface of VS2 inside from the incoming interface to VS3 then.

Step 206, VS2 send PATH message to VS3, carry caller and called E164 address and the parameters such as bandwidth/qos requirement that are connected in PATH message, and the outbound port record of affix VS2.

Step 207, VS3 with interface that VS2 links to each other on receive PATH message after, search called number 80006001, find that the called subscriber is the user who self manages, then reserve the resource of VS3 inside, and be that this connects application and distributes the VLAN label at self incoming interface place from incoming interface to called subscriber's LAN interface.

Step 208, VS3 are after the resource reservation success, and upstream VS2 sends Resv message, and carries the VLAN label information that is distributed in this Resv message.

Step 209, the upstream VS1 of VS2 send Resv message, and in this Resv message with on connect the VLAN label information that application distributes at self incoming interface place for this.

After step 210, VS1 receive Resv message, obtain this and connect the routing information of application from calling subscriber to called subscriber.

So far, prior art is set up the path that is connected between be over calling subscriber and the called subscriber.

Fig. 3 is the flow chart of prior art transmitting data stream in the V-Switch system.Referring to Fig. 3, prior art is after having set up being connected of calling subscriber and called subscriber, and the detailed process of transmitting data stream may further comprise the steps:

Step 301, calling subscriber are sent to load bearing equipment VS1 under self with data flow.

Path shown in bandwidth resources that step 302, load bearing equipment VS1 are reserved when connecting and the VLAN label information with this data flow transmission to VS2.

Path shown in bandwidth resources that step 303, load bearing equipment VS2 are reserved when connecting and the VLAN label information with this data flow transmission to VS3.

Path shown in bandwidth resources that step 304, load bearing equipment VS3 are reserved when connecting and the VLAN label information with this data flow transmission to the called subscriber.

So far, prior art has been finished once complete professional transmission course.

As seen, there is following shortcoming in the prior art process of finishing professional transmission in the V-Switch system:

Since prior art only to the bearing capacity layer in the V-Switch system be connected key-course and carried out layering logic layers, and do not carry out the actual physical layering, the bearing capacity layer be connected the load bearing equipment VS that key-course is integrated in same physics on.Therefore, when finishing professional transmission, load bearing equipment VS at first needs to finish the function that connects key-course, with the mutual signaling flow of service control layer equipment SCR and set up between the calling and called and be connected end to end; After having set up connection, load bearing equipment VS needs to finish the function of bearing capacity layer again, according to the connection transmitting data stream of being set up.That is to say, the load bearing equipment of carrying data flow transmission function not only will support data flow also will support signaling flow, not only to finish the data flow forwarding and also will carry out bandwidth control, therefore the disposal ability to load bearing equipment has proposed higher requirement, and exists load bearing equipment upgrading difficulty, carries out topological sum and manage too complicated problems.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of method of finishing professional transmission in virtual exchange system,

Another object of the present invention is to provide a kind of professional system for transmitting of in virtual exchange system, finishing, make a load bearing equipment transmitting data stream, function singlenessization.

In order to achieve the above object, technical scheme of the present invention is achieved in that

A kind of method of finishing professional transmission in virtual exchange system is separate physical equipment with connection key-course equipment in the V-Switch system and bearing capacity layer device separates, and this method is further comprising the steps of:

Service control layer equipment in A, the virtual exchange system is sent to resource request message and its direct-connected key-course equipment first empty exchange control unit VSC that is connected after receiving the call request of calling subscriber's initiation;

B, a VSC transmit this resource request message by downstream VSC at different levels, the purpose VSC under the called subscriber;

C, purpose VSC are this professional connection distribution bandwidth in the bearing capacity layer region of self administering, and select to be used for the device data Delivery Function DRE of transmitting data stream;

D, purpose VSC upwards return the resource request response step by step until a VSC, and each VSC that receives the resource request response distributes bandwidth for this business connects in self administers the bearing capacity layer region, and selects to be used for the DRE of transmitting data stream;

Selected each DRE of E, each VSC utilizes data flow transmission that the bandwidth of being distributed sends the calling subscriber to the called subscriber.

Carry called number information in the described resource request message;

Described step B further comprises: each VSC determines self whether to be purpose VSC under the called subscriber according to the called number information in the resource request message.

Carry bandwidth requirement information in the described resource request message;

Each VSC is this professional connection to distribute bandwidth according to the bandwidth requirement information in the resource request message.

In step D, the DRE that has selected self to administer in the bearing capacity layer region at each VSC further may further comprise the steps afterwards:

A. described VSC distributes inlet virtual LAN VLAN sign and outlet VLAN sign, and this entrance and exit VLAN sign illustrates selected each DRE from inlet to outlet of described VSC;

B. described VSC is sent to each DRE that self selects with bandwidth, ingress VLAN sign and the outlet VLAN sign of distributing;

C. described each DRE reserves bandwidth, and sets up the VLAN swap table respectively according to ingress VLAN sign and outlet VLAN sign, and the VLAN swap table that each DRE set up identifies this DRE with the concrete transmission path of data flow transmission to downstream DRE;

D. described each DRE is sent to described VSC with success response;

In step e, the bandwidth that each DRE utilized is the bandwidth that self reserves.

In step e, the selected DRE of each VSC further utilizes the data flow that VLAN path that swap table identifies transmission calling subscriber sends in self.

Between step D and step e, this method further comprises: a VSC is sent to service control layer equipment with the resource request success response.

Carry out the mutual of message by Resource Connection Initial Protocol RCIP between described service control layer equipment and the described VSC.

Carry out the mutual of message by general open policy service protocol Extended Protocol COPS+ between the described VSC and between described VSC and the described DRE.

A kind ofly finish professional system for transmitting in virtual exchange system, comprise service control layer equipment, connect key-course equipment and bearing capacity layer equipment, connecting key-course equipment and bearing capacity layer equipment is separate physical equipment, wherein,

Service control layer equipment is used to receive the call request that the calling subscriber sends, and resource request message is sent to connection key-course equipment; Connect key-course equipment, be used to this professional connection Resources allocation, and the resource of being distributed is issued to bearing capacity layer equipment; Described connection key-course equipment comprises at least: first empty exchange control unit VSC and the purpose VSC; A described VSC is used to receive the resource request information of described service control layer equipment transmission and transmits this resource request message, the purpose VSC under the called subscriber by downstream VSC at different levels; Described purpose VSC is used for distributing bandwidth for this professional connection in the bearing capacity layer region of self administering, and selection is used for the device data Delivery Function DRE of transmitting data stream, upwards return the resource request response step by step until a VSC, each VSC that receives the resource request response is this professional connection distribution bandwidth in self administers the bearing capacity layer region, and selects to be used for the DRE of transmitting data stream; Bearing capacity layer equipment is used to utilize the resource transmission data flow of being distributed; Described bearing capacity layer equipment comprises at least two data Delivery Function DRE; Each is utilized data flow transmission that bandwidth that described VSC distributes sends the calling subscriber to the called subscriber by the selected DRE of each VSC.

As seen, the method for the present invention's proposition has the following advantages:

The present invention to the bearing capacity layer in the V-Switch system be connected key-course and carried out the actual physical layering, with connecting key-course equipment and bearing capacity layer device design is separate network entity, be responsible for being connected end to end to set up between the calling and called by connecting key-course equipment, and the load bearing equipment of bearing capacity layer only need utilize the connection transmitting data stream of being set up with the mutual signaling flow of service control layer equipment.That is to say, load bearing equipment need not to support signaling flow only need support data flow, need not to carry out bandwidth control and only need finish forwarding capability and get final product, so reduced requirement to the load bearing equipment disposal ability, make the load bearing equipment function singlenessization, be convenient to load bearing equipment is carried out the topological sum management.

Description of drawings

Fig. 1 is the model structure schematic diagram of V-Switch system.

Fig. 2 is that prior art is set up the flow chart that the calling subscriber is connected with the called subscriber in the V-Switch system.

Fig. 3 is the flow chart of prior art transmitting data stream in the V-Switch system.

Fig. 4 is the composition structural representation of system of the present invention.

Fig. 5 is the flow chart that the present invention sets up the specific embodiment that the calling subscriber is connected with the called subscriber.

Fig. 6 is the flow chart of a specific embodiment of transmitting data stream of the present invention.

Embodiment

For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with drawings and the specific embodiments.

In the prior art, owing to connect key-course and bearing capacity layer on the load bearing equipment of same physics, therefore signaling flow and data flow all need to transmit by load bearing equipment, exist load bearing equipment upgrading difficulty, carry out topological sum and manage too problems such as complexity.At this defective, the present invention proposes the distributed mechanism in the V-Switch system, with connecting key-course equipment and bearing capacity layer device separates is separate physical equipment, carry out the mutual of signaling flow by independently connecting key-course equipment and service control layer equipment, by bearing capacity layer load bearing equipment transmitting data stream independently, make the load bearing equipment function singlenessization, no longer carry out signaling process.

Fig. 4 is the composition structural representation of system of the present invention.Referring to Fig. 4, system of the present invention comprises separate service control layer equipment, connects key-course equipment and bearing capacity layer equipment.Wherein, service control layer equipment is mainly SCR, and the various user data according to record comprise physical location, authority, charging authentication and interface capability information etc., the user is carried out authentication, and carry out associative operations such as resource bid, modification and release to connecting key-course equipment by signaling flow; Connecting key-course equipment is empty exchange control unit (VSC), be responsible for the exchange resource in the maintaining network, comprise bandwidth, bearing capacity layer equipment, interface, link and VLAN etc., for data flow is selected service path, distributes the VLAN resource and is reclaimed resource etc., satisfy the qos requirement of data flow, and resource control information is issued on the bearing capacity layer equipment, in a word, VSC has born functions such as end-to-end vlan exchange establishment of connection, maintenance and dismounting, is the control nerve of V-Switch system; Bearing capacity layer equipment, (DRE) forms by the plurality of data Delivery Function, according to the resource control information that VSC issues, carries out actual data flow and transmits.

Referring to Fig. 4, in system of the present invention, VSC connects initialization (RCIP) agreement by resource and is connected with SCR and other VSC, VSC policy service expansion (COPS+) agreement by general opening is connected with each DRE in this bearing capacity layer-management territory, such as, VSC1 is connected by COPS+ agreement and this management domain interior DRE1, DRE2, DRE3 and DRE4.

In the V-Switch system, finish the professional process of transmitting below in conjunction with system of the present invention shown in Figure 4 and a specific embodiment explanation the present invention.In this embodiment, suppose that calling subscriber and called subscriber do not belong to same VSC, and the calling subscriber links to each other directly with VSC under the called subscriber.

Fig. 5 is the flow chart that the present invention sets up the specific embodiment that the calling subscriber is connected with the called subscriber.Referring to Fig. 4 and Fig. 5, in the present embodiment, set up the detailed process that is connected between calling subscriber and the called subscriber by signaling flow and may further comprise the steps:

Step 501, calling subscriber UE1 are to the affiliated SCR1 request of making a call.

Step 502, SCR1 send the resource request message that carries caller information to the VSC1 that directly links to each other with self after receiving call request.

Here, comprise information such as rear subscriber number, called number and bandwidth requirement in the described caller information.

Step 503, VSC1 know that according to the called number that carries in the resource request message this called subscriber is not the user of self-management, and the resource request message that then this is carried caller information is sent to VSC2.

Step 504, VSC2 know that according to the called number that carries in the resource request message called subscriber UE2 is the user of self-management, then be this traffic assignments resource in the bearing capacity layer region of self administering, the resource of being distributed comprises bandwidth, outlet VLAN sign and ingress VLAN sign etc.

Here, VSC2 selects in the bearing capacity layer region of self administration from the DRE that enters the mouth to a paths that exports DRE by distributing outlet VLAN sign and ingress VLAN sign.Referring to Fig. 4, DRE5 has much to the transmission path that exports DRE6 from inlet, comprise DRE5 to DRE6, DRE5 to DRE7 to DRE6 and DRE5 to DRE7 to DRE8 to DRE6, herein, VSC2 selects a paths wherein arbitrarily, is example with path DRE5 to DRE6 below.

Step 505, VSC2 are handed down to DRE5 and DRE6 with the resource information of being distributed, and after DRE5 and DRE6 receive the resource allocation information that VSC2 sends, carry out correspondingly resource mapping fitting operation respectively, return the successful installation response to VSC2 then.

Here, the resource mapping fitting operation that DRE5 and DRE6 carry out respectively comprises: set up the VLAN swap table respectively for this professional bandwidth reserved with according to outlet VLAN sign and ingress VLAN sign, the VLAN swap table of being set up identifies the concrete path of each DRE transmitting data stream respectively, such as, the VLAN swap table that DRE5 set up identify DRE5 with data flow transmission to next jump load bearing equipment DRE6 the concrete transmission path of process.

Step 506, VSC2 beam back the resource request response to VSC1 after receiving the successful installation response of DRE5 and DRE6.

After step 507, VSC1 receive the resource request response of VSC2, be this traffic assignments resource in the bearing capacity layer region of self administering, the resource of being distributed comprises bandwidth, outlet VLAN sign and ingress VLAN sign etc.

Here, VSC1 selects in the bearing capacity layer region of self administration from the DRE that enters the mouth to a paths that exports DRE by distributing outlet VLAN sign and ingress VLAN sign.Referring to Fig. 4, from the inlet DRE1 have much to the transmission path that exports DRE4, VSC1 selects a paths wherein arbitrarily, below with path DRE1 to DRE2 to DRE4 be example.

Step 508, VSC1 are handed down to DRE1, DRE2 and DRE4 with the resource information of being distributed, after DRE1, DRE2 and DRE4 receive the resource allocation information that VSC1 sends, carry out correspondingly resource mapping fitting operation respectively, return the successful installation response to VSC1 then.

Here, the resource mapping fitting operation that carries out respectively of DRE1, DRE2 and DRE4 comprises: be identified at for this professional bandwidth reserved with according to outlet VLAN sign and ingress VLAN and set up the VLAN swap table in self.

Step 509, VSC1 beam back the resource request success message to SCR after receiving the successful installation response.

So far, the present invention sets up being connected between be over calling subscriber and the called subscriber.

Fig. 6 is the flow chart of a specific embodiment of transmitting data stream of the present invention.Referring to Fig. 6, in the V-Switch system, the detailed process that professional transmission is finished in the connection that the present embodiment utilization is set up may further comprise the steps:

Step 601, calling subscriber UE1 are sent to DRE1 with data flow.

Step 602, DRE1 are known transmission path according to the VLAN swap table of self, then utilize this transmission path and the bandwidth reserved is sent to DRE2 with this data flow.

Step 603, DRE2 are known transmission path according to the VLAN swap table of self, then utilize this transmission path and the bandwidth reserved is sent to DRE4 with this data flow.

Step 604, DRE4 are known transmission path according to the VLAN swap table of self, then utilize this transmission path and the bandwidth reserved is sent to DRE5 with this data flow.

Step 605, DRE5 are known transmission path according to the VLAN swap table of self, then utilize this transmission path and the bandwidth reserved is sent to UE2 with this data flow.

So far, the present invention has finished the once complete professional transmission course in the V-Switch system.

Shown in Figure 5 pass through process that signaling flow connects as can be seen by above-mentioned, signaling flow of the present invention transmits with being connected between the key-course equipment VSC at service control layer equipment SCR, and does not transmit by load bearing equipment DRE.By data flow transmission process shown in Figure 6 as can be seen, data flow of the present invention is transmitted by each load bearing equipment DRE, and need not again through connecting key-course equipment.Therefore, the present invention has realized signaling flow is separated with the Delivery Function of data flow, makes the purpose of load bearing equipment function singlenessization.

In the above-described embodiments, calling subscriber and called subscriber do not belong to same VSC, and the calling subscriber directly links to each other with VSC under the called subscriber.In other embodiments of the invention, if calling subscriber and called subscriber belong to same VSC, this VSC directly is the traffic assignments resource so, each DRE in this VSC management domain is according to the resource transmission data flow of being distributed, and the principle of its specific implementation process is identical with the principle of the foregoing description implementation procedure;

If calling subscriber and called subscriber do not belong to same VSC, and when comprising a plurality of VSC between the VSC under calling subscriber and the called subscriber, VSC under the calling subscriber sends described resource request message by the downstream VSC of VSC at different levels under the called subscriber, afterwards, the VSC of VSC under the called subscriber under to upstream VSC at different levels to the calling subscriber is this traffic assignments resource step by step again, DRE in each VSC management domain is according to the resource transmission data flow of being distributed, and the principle of its specific implementation process is identical with the principle of the foregoing description implementation procedure.

In a word, the above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1, a kind of method of finishing professional transmission in virtual exchange system is characterized in that, is separate physical equipment with connection key-course equipment in the virtual exchange system and bearing capacity layer device separates, and this method is further comprising the steps of:

2, method according to claim 1 is characterized in that, carries called number information in the described resource request message;

3, method according to claim 1 is characterized in that, carries bandwidth requirement information in the described resource request message;

4, method according to claim 1 is characterized in that, in step D, the DRE that has selected self to administer in the bearing capacity layer region at each VSC further may further comprise the steps afterwards:

D. described each DRE is sent to described VSC with success response;

5, method according to claim 4 is characterized in that, in step e, the selected DRE of each VSC further utilizes the data flow that VLAN path that swap table identifies transmission calling subscriber sends in self.

6, method according to claim 1 is characterized in that, between step D and step e, this method further comprises: a VSC is sent to service control layer equipment with the resource request success response.

7, method according to claim 1 is characterized in that, carries out the mutual of message by Resource Connection Initial Protocol RCIP between described service control layer equipment and the described VSC.

8, method according to claim 1 is characterized in that, carries out the mutual of message by general open policy service protocol Extended Protocol COPS+ between the described VSC and between described VSC and the described DRE.

9, a kind ofly in virtual exchange system, finish professional system for transmitting, comprise service control layer equipment, connect key-course equipment and bearing capacity layer equipment, it is characterized in that connecting key-course equipment and bearing capacity layer equipment is separate physical equipment, wherein,

Service control layer equipment is used to receive the call request that the calling subscriber sends, and resource request message is sent to connection key-course equipment;

Connect key-course equipment, be used to this professional connection Resources allocation, and the resource of being distributed is issued to bearing capacity layer equipment; Described connection key-course equipment comprises at least: first empty exchange control unit VSC and the purpose VSC; A described VSC is used to receive the resource request information of described service control layer equipment transmission and transmits this resource request message, the purpose VSC under the called subscriber by downstream VSC at different levels; Described purpose VSC is used for distributing bandwidth for this professional connection in the bearing capacity layer region of self administering, and selection is used for the device data Delivery Function DRE of transmitting data stream, upwards return the resource request response step by step until a VSC, each VSC that receives the resource request response is this professional connection distribution bandwidth in self administers the bearing capacity layer region, and selects to be used for the DRE of transmitting data stream;

Bearing capacity layer equipment is used to utilize the resource transmission data flow of being distributed; Described bearing capacity layer equipment comprises at least two data Delivery Function DRE; Each is utilized data flow transmission that bandwidth that described VSC distributes sends the calling subscriber to the called subscriber by the selected DRE of each VSC.

10, method according to claim 9 is characterized in that, described service control layer equipment connects initialization RCIP agreement by resource and links to each other with the described key-course equipment that is connected; Described connection key-course equipment links to each other with described bearing capacity layer equipment by general open policy service protocol expansion COPS+ agreement.