CN101494587B - Method for processing packet network tunnel and communication system as well as relevant equipment - Google Patents
Method for processing packet network tunnel and communication system as well as relevant equipment Download PDFInfo
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- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
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Abstract
The invention discloses a packet network tunnel processing method, a communication system and related equipment thereof, which are used for improving the tunnel processing efficiency in HSAPN. The method includes the following steps: a tunnel establishment request sent by an upstream node is received, and the tunnel establishment request contains a bandwidth requirement; and access detection is carried out according to the tunnel establishment request, if successful, resource reservation is carried out according to the bandwidth requirement, and a tunnel establishment response is sent to the upstream node. The invention also provides the communication system and the related equipment. The invention can effectively improve the tunnel processing efficiency in the HSAPN.
Description
Technical field
The present invention relates to hierarchy sequential address packet network HSAPN, relate in particular to a kind of method for processing packet network tunnel and communication system and relevant device.
Background technology
A kind of hierarchy sequential address packet network (HSAPN, Hierarchical and Sequential Address Packet Network) occurred in the communication network at present, for example the common telecommunication grouping data net comprises a HSAPN net at least in this data network.
This HSAPN is used to carry the whole telecommunication services that existed already at present, and can guarantee that the telecommunication service that it carries can provide and the professional same services quality of conventional telecommunications.It can carry Internet service, and the ability identical with existing the Internet is provided, and supports the whole Internet services that existed already at present.
In the prior art; Processing (comprises the foundation in tunnel based on the tunnel among the HSAPN; Operation such as resource reservation or tunnel maintenance) mode all adopts the mode of static manual configuration to realize; Promptly on each tunnel node, dispose relevant parameters, make several specific tunnel nodes form a tunnel through manual work.
But, the manual work that the mode of prior art can labor, and the tunnel of manual configuration point-to-point, resource, promptly complicated, therefore easy error has reduced the efficient that the tunnel is handled among the HSAPN again.
Summary of the invention
The embodiment of the invention provides a kind of method for processing packet network tunnel and communication system and relevant device, can improve the efficient that the tunnel is handled among the HSAPN.
The method for processing packet network tunnel that the embodiment of the invention provides comprises: receive the tunnel foundation request that upstream node sends, said tunnel is set up in the request and is comprised bandwidth demand; Carry out access according to the foundation request of said tunnel and detect,, then carry out resource reservation, and set up response to said upstream node transmission tunnel according to said bandwidth demand if successful.
The communication system that the embodiment of the invention provides comprises: source node, and be used to carry out access and detect, send the tunnel and set up request and tunnel acknowledge message, receive the tunnel and set up response; Destination node is used for carrying out access according to the tunnel foundation request that receives and detects, and as if through detection, then according to the tunnel request of setting up carrying out resource reservation, and passes through said intermediate node to the tunnel foundation response of said source node feedback.
The network node that the embodiment of the invention provides is applied to comprise in the packet network: the request generation unit is set up in the tunnel, is used for generating the tunnel according to the tunnel relevant information and sets up request; Request transmitting unit is set up in the tunnel, is used for sending to downstream node said tunnel and sets up request; The tunnel is set up and is responded receiving element, is used for the tunnel foundation that the reception downstream node sends after said tunnel is set up request transmitting unit to send tunnel foundation request to downstream node and responds.
The network node that the embodiment of the invention provides is applied to comprise in the packet network: the request receiving element is set up in the tunnel, is used to receive the tunnel foundation request that upstream node sends; The access control unit is used for setting up the tunnel request of setting up of asking receiving element to receive according to said tunnel and carries out the access detection; Control unit is set up in the tunnel, is used for bandwidth resource; The response process unit is set up in the tunnel, is used for upstream nodes and sends tunnel foundation response.
Can find out that from above technical scheme the embodiment of the invention has the following advantages:
In the embodiment of the invention; Upstream node sends the tunnel to downstream node and sets up request until the node that achieves the goal; Downstream node is set up request bandwidth resource and upstream nodes feedback response according to the tunnel; So can generate the tunnel automatically according to actual conditions, and not need manual work that node is configured, therefore improve the efficient that the tunnel is handled among the HSAPN.
Description of drawings
Fig. 1 is embodiment sketch map of method for processing packet network tunnel in the embodiment of the invention;
Fig. 2 is another embodiment sketch map of method for processing packet network tunnel in the embodiment of the invention;
Fig. 3 is a communication system embodiment sketch map in the embodiment of the invention;
Fig. 4 is embodiment sketch map of network node in the embodiment of the invention;
Fig. 5 is another embodiment sketch map of network node in the embodiment of the invention.
Embodiment
The embodiment of the invention provides a kind of method for processing packet network tunnel and communication system and relevant device, is used for improving the efficient that the HSAPN tunnel is handled.
In the embodiment of the invention; Upstream node sends the tunnel to downstream node and sets up request until the node that achieves the goal; Downstream node is set up request bandwidth resource and upstream nodes feedback response according to the tunnel; So can generate the tunnel automatically according to actual conditions, and not need manual work that node is configured, therefore improve the efficient that the tunnel is handled among the HSAPN.
At first introduce the application system scene of the embodiment of the invention; This system comprises at least one HSAPN net, several Internet protocols (IP, Internet Protocol) net, and several boundary solids (ED; Edge Device) equipment, IP network is connected with the HSAPN net through ED equipment; Also comprise at least one address translation entity (ADT) in each HSAPN net; All devices and ED equipment in the HSAPN net are furnished with a HSAPN address, and all devices in the IP network and ED equipment all are assigned the IP address, and the mapping relations between IP address and the HSAPN address are kept in the address mapping table in the ADT.
In the embodiment of the invention, after source node sent tunnel foundation request to downstream node, each node need be set up the request bandwidth resource according to this tunnel, and concrete reservation mode can be divided into following two types:
One, the situation that postpones reservation:
In this mode; Intermediate node or destination node are after all the node access detects successfully; Just set up request reservation corresponding bandwidth resource at this intranodal according to the tunnel, specifically see also Fig. 1, method for processing packet network tunnel one embodiment comprises in the embodiment of the invention:
101, source node sends the tunnel to intermediate node and sets up request;
In the present embodiment, source node also need obtain the tunnel relevant information send tunnel foundation request to intermediate node before, for example the source node in this tunnel; Destination node, bandwidth demand, information such as intermediate node and tunnel path; These information are produced by control and management equipment or human configuration planning, and for example user A request is carried out communication with user B, and then user A can be committed to control and management equipment (can be the tunnel management server) with this communication request; This control and management equipment is confirmed source node A (can be a router) according to the residing position of user A, confirms destination node D (can be a router) according to the residing position of user B, confirms the needed bandwidth of this communication according to the communication request that user A submits to; For example the bandwidth demand of voice communication is X; The bandwidth demand of video communication is Y, supposes that the communication request that active user A proposes is a video communication, and then control and management equipment confirms that the needed bandwidth of this communication is Y; In addition; Control and management equipment also needs the path between calculation sources node A and the destination node D, and promptly source node A and destination node D carry out communication and need pass through which intermediate node, and concrete account form can be shortest-path first algorithm; It is the intermediate node of the shortest path process between query source node A and the destination node D; Perhaps can also be to choose the best node of performance in the current network as intermediate node, or choose idling-resource is maximum in the current network node as intermediate node, concrete account form not be done qualification.Suppose that the intermediate node that inquires according to shortest-path first algorithm is B and C, then tunnel path is confirmed as A-B-C-D.Foregoing description be the situation that has intermediate node; It is understandable that; If have direct communication channel between source node A and the destination node D; Then can not need intermediate node, the technical scheme in the more detailed explanation embodiment of the invention all describes with the situation that has intermediate node in present embodiment and follow-up each embodiment.
The tunnel relevant information that control and management equipment is confirmed is:
Source node: A
Destination node: D
Intermediate node: B, C
Bandwidth demand: Y
Tunnel path: A-B-C-D
It is understandable that; The tunnel relevant information of foregoing description can also change in practical application, and specifying information is not done qualification, in addition; Bandwidth demand fixes in the practical application really and not only depends on type of service; This bandwidth demand can also be specified by manual work, or takes other modes to specify, and does not do qualification here.
Need to prove; At present embodiment, and in the subsequent implementation example, downstream node is meant and in tunnel path, is positioned at this node node afterwards; Upstream node is meant and in tunnel path, is positioned at this node node before; For example the downstream node of node A is B, and C and D, the upstream node of node C are node A and B.
Control and management equipment is sent to source node A with the tunnel relevant information of confirming; Source node A receives after these information at first based on bandwidth demand and judges whether the idle bandwidth of self node satisfies this bandwidth demand; If satisfy; Then these tunnel groups of related information symphysis are become the tunnel to set up request, and the request of setting up of this tunnel is carried in the HSAPN control message, this HSAPN control message is sent to next node B according to tunnel path.
In the present embodiment, source node needed carry out the access detection according to the bandwidth demand that gets access to before sending tunnel foundation request equally; Whether the idle bandwidth of promptly judging self can satisfy this bandwidth demand; If can satisfy, then send the tunnel to downstream node and set up request, if can not satisfy; Then, represent that self can't provide enough bandwidth directly to control and management equipment feedback error information.
102, intermediate node receives the tunnel and sets up request;
Intermediate node B receives the HSAPN control messages from source node A, and from this control messages, obtains the tunnel and set up request, and this tunnel is set up in the request can also comprise the reservation mode field; This field is used in reference to the follow-up mode of being taked when carrying out RSVP that is shown in; Specifically can be fixed form, or sharing mode, fixed form is and fixedly takies certain bandwidth; This bandwidth only supplies current business to use, and sharing mode is the bandwidth of reservation and can shares according to occupancy and other are professional.
Need to prove; Follow-up tunnel is set up in the request can carry the mode that this reservation mode field is used to indicate RSVP equally; But this field and inessential field; If system is merely able to take fixedly reservation mode or shared reservation mode when when making up, confirming to set up the tunnel in the native system, then can not need this field.
103, judge that whether access detects successful, if success then carries out 105, if unsuccessful, then carries out 104;
Intermediate node B checks at first whether requested data format is set up in this tunnel correct after getting access to the tunnel request of setting up, if correct, then set up the request from this tunnel again and obtain bandwidth demand, and judge whether the idling-resource of self node satisfies bandwidth demand.
In the present embodiment; The detection tunnel is set up requested data format and is comprised detecting this tunnel sets up in the request whether comprised necessary tunnel relevant information; It is understandable that, in practical application, if can guarantee reliability of data transmission; Can the data form not detected, and directly whether the idling-resource of detection node satisfies bandwidth demand.
104, execute exception handling process, and process ends;
If carrying out access, intermediate node B detects failure; Execute exception handling process then, for example intermediate node B detects the tunnel to set up requested data format incorrect, or the intermediate node B idle bandwidth that detects self node can not satisfy the tunnel and sets up the bandwidth demand in the request; Then can the execute exception handling process; Whether concrete abnormality processing flow process can by the foundation that source node A judges whether to stop current tunnel, perhaps be retransmitted the tunnel and set up request for to source node A feedback error information.
105, send the tunnel according to tunnel path to next node and set up request until arriving destination node;
In the present embodiment, intermediate node B sends the tunnel according to tunnel path A-B-C-D to next node C and sets up request after detecting through access; The request of setting up of this tunnel can be to set up request from the tunnel that source node A receives, and promptly intermediate node B directly will be forwarded to intermediate node C from the tunnel request of setting up that source node A receives, and the request of setting up of this tunnel can also be generated by intermediate node B separately; If setting up, the tunnel also comprises a parameter in the request: node identification; Be used to indicate the foundation of current tunnel to ask the node that also need pass through, the node identification of then setting up the request from the tunnel that source node A sends is B, C; D; After intermediate node B, intermediate node B is revised as C with this node identification, D; And generate the tunnel request of setting up separately; Other tunnel relevant informations in this tunnel foundation request are all consistent with other tunnel relevant informations that the tunnel that source node A sends is set up in asking, i.e. the tunnel request of setting up of intermediate node B generation is used to set up the tunnel equally, but the content that the tunnel that its content that comprises and source node A generate foundation comprises in asking is different.
Intermediate node B and C set up according to tunnel path transmission tunnel and ask, and arrive destination node D until this request, and destination node D receives after this tunnel foundation request, obtains node identification wherein, can know certainly as destination node.
Need to prove that above-mentioned intermediate node C and destination node D need carry out access equally and detect, unsuccessful if access detects, need the execute exception handling process equally.
106, destination node bandwidth resource and feed back the tunnel and set up response;
The corresponding bandwidth resource is reserved in the resource requirement that destination node D sets up in the request according to the tunnel in destination node D inside after detecting through access; And send the tunnel according to tunnel path to even higher level of node and set up response, this tunnel is set up response and is sent to intermediate node C.
107, intermediate node bandwidth resource and feed back the tunnel and set up response;
Intermediate node C reserves the corresponding bandwidth resource in inside according to the resource requirement that the tunnel is set up in the request; And the tunnel path of setting up in the request according to the tunnel is provided with the routing table among the intermediate node C or sets up label swap table and distributing labels; Include only the node adjacent in this routing table with intermediate node C; Be intermediate node B and destination node D; After bandwidth resources are reserved and are accomplished; Intermediate node C sends the tunnel to intermediate node B and sets up response, and intermediate node B need carry out same operation, promptly receives the tunnel and sets up and reserve the corresponding bandwidth resource after the response and routing table is set or sets up label swap table and distributing labels; Transmit this tunnel to source node A more afterwards and set up response, source node A sets up the resource requirement reservation corresponding bandwidth resource in the request in self inside according to the tunnel after setting up response equally receiving this tunnel.
108, source node sends the tunnel acknowledge message to accomplish tunnel foundation.
Source node A sends the tunnel acknowledge message to intermediate node B after response is set up in the tunnel that receives intermediate node B forwarding; This tunnel acknowledge message is sent to destination node D after passing through intermediate node B and intermediate node C according to tunnel path, and so far packet network tunnel is set up and accomplished.
Above-mentioned tunnel can be a unidirectional tunnel, also can be bidirectional tunnel, and promptly after completion was set up in the tunnel, A can pass through B, and C and D carry out communication, and D also can pass through C simultaneously, and B and A carry out communication.
Need to prove that step 108 is an optional step, promptly can carry out also in actual applications and can not carry out.
Foregoing description the process set up of tunnel, in practical application, still possibly have some processing after the tunnel is set up and accomplished to this tunnel, the for example maintenance in tunnel and the error notification in the tunnel specify below:
1, tunnel maintenance:
Concrete tunnel maintenance can comprise dual mode in the present embodiment:
1.1, periodic maintenance:
In this mode; Each node router carries out periodic refreshing according to the cycle of presetting (for example whenever carrying out once at a distance from 1 minute); Promptly send the tunnel to downstream node and set up request or the foundation response of upstream nodes transmission tunnel; And wait for that tunnel foundation request and tunnel foundation that other node routers send respond; If (for example 3 minutes) do not receive that request is set up in tunnel that other node routers send or response is set up in the tunnel in the sense cycle that presets, confirm that then current tunnel is disconnected, then delete the bandwidth resources of reserving in self node router.
It is understandable that above-mentioned only is a kind of mode that detects disconnection, can be other modes in practical application equally, for example is that the above-mentioned number of times that does not receive tunnel foundation request or tunnel foundation response reaches threshold value, confirms that then current tunnel is disconnected.
1.2, passive maintenance:
In this mode; Each node router can not detect the tunnel situation voluntarily, but request is removed in the tunnel that other node routers of passive wait send, and this tunnel tear down message can be initiated by source node A; Also can initiate, can also initiate by intermediate node B or C by destination node D.
If initiate by source node A; Then the request of removing of this tunnel can be according to the tunnel path order through intermediate node B; C and destination node D; After intermediate node B receives this tunnel dismounting request; Transmit this request to intermediate node C; And deleting self node reserved resource and routing table, intermediate node C carries out same operation, until arriving destination node D;
If initiate by destination node D; Then the request of removing of this tunnel can be according to the tunnel path order through intermediate node C; B and source node A; After intermediate node C receives this tunnel dismounting request; Transmit this request to intermediate node B; And deleting self node reserved resource and routing table, intermediate node B carries out same operation, until arriving source node A;
If initiated by intermediate node B, then this tunnel dismounting request meeting is mail to source node A and intermediate node C simultaneously according to the tunnel path order, and is sent to destination node D through intermediate node C, and each node is deleted the bandwidth resources that self node is reserved equally.
2, error notification:
In the repeating process that the tunnel is set up in the repeating process of asking or tunnel foundation responds, if error of transmission occurs, then need carry out error notification,
If in the repeating process of tunnel foundation request, error of transmission occurs; Then recipient's node is set up request error message according to tunnel path to superior node feedback tunnel; The final source node that arrives; And by source node decision processing mode; Can be for resending; Or stop to set up tunnel or other processing modes;
If in the repeating process of tunnel foundation response, error of transmission occurs, then recipient's node is set up the response error message according to tunnel path to downstream site feedback tunnel, finally arrives destination node; And by destination node decision processing mode, can be for resending, or stop to set up the tunnel; Or other processing modes, it is understandable that recipient's node can also be set up the response error message to superior node feedback tunnel according to tunnel path; The final source node that arrives, and by source node decision processing mode, can be for resending; Or stop to set up the tunnel; Or other processing modes, then all in this case tunnel error announcements all can be sent to source node, so can carry out unified management to the tunnel by source node.
The process that packet network tunnel is set up has been described in the foregoing description; Source node sends the tunnel to downstream node according to the tunnel path that presets and sets up request until the node that achieves the goal; Downstream node is according to tunnel foundation request bandwidth resource and to the source node feedback response; So can generate the tunnel automatically according to actual conditions; And do not need manual work that node is configured, therefore improved the efficient that the tunnel is handled among the HSAPN;
Secondly, what take in the foregoing description is to postpone the mode reserved, interdependent node all pass through access detect after bandwidth resource again, so further improved tunnel processing reliability among the HSAPN.
Introduce the mode that other a kind of packet network tunnel is handled below:
Two, instant situation about reserving:
In this mode; Source node, intermediate node or destination node are reserved the corresponding bandwidth resource at this intranodal according to bandwidth demand immediately after access detects successfully; Specifically see also Fig. 2, in the embodiment of the invention method for processing packet network tunnel another execute example and comprise:
201, source node sends the tunnel to intermediate node and sets up request;
In the present embodiment, source node also need obtain the tunnel relevant information send tunnel foundation request to intermediate node before, for example the source node in this tunnel; Destination node, bandwidth demand, information such as intermediate node and tunnel path; These information are produced by control and management equipment or human configuration planning, and for example user A request is carried out communication with user B, and then user A can be committed to control and management equipment (can be the tunnel management server) with this communication request; This control and management equipment is confirmed source node A (can be a router) according to the residing position of user A, confirms destination node D (can be a router) according to the residing position of user B, confirms the needed bandwidth of this communication according to the communication request that user A submits to; For example the bandwidth demand of voice communication is X; The bandwidth demand of video communication is Y, supposes that the communication request that active user A proposes is the time-frequency communication, and then control and management equipment confirms that the needed bandwidth of this communication is Y; In addition; Control and management equipment also needs the path between calculation sources node A and the destination node D, and promptly source node A and destination node D carry out communication and need pass through which intermediate node, and concrete account form can be shortest-path first algorithm; It is the intermediate node of the shortest path process between query source node A and the destination node D; Perhaps can also be to choose the best node of performance in the current network as intermediate node, or choose idling-resource is maximum in the current network node as intermediate node, concrete account form not be done qualification.Suppose that the intermediate node that inquires according to shortest-path first algorithm is B and C, then tunnel path is confirmed as A-B-C-D.Foregoing description be the situation that has intermediate node; It is understandable that; If have direct communication channel between source node A and the destination node D; Then can not need intermediate node, the technical scheme in the more detailed explanation embodiment of the invention all describes with the situation that has intermediate node in present embodiment and follow-up each embodiment.
The tunnel relevant information that control and management equipment is confirmed is:
Source node: A
Destination node: D
Intermediate node: B, C
Bandwidth demand: Y
Tunnel path: A-B-C-D
It is understandable that; The tunnel relevant information of foregoing description can also change in practical application, and specifying information is not done qualification, in addition; Bandwidth demand fixes in the practical application really and not only depends on type of service; This bandwidth demand can also be specified by manual work, or takes other modes to specify, and does not do qualification here.
Control and management equipment is sent to source node A with the tunnel relevant information of confirming; Source node A receives after these information at first based on bandwidth demand and judges whether the idle bandwidth of self node satisfies this bandwidth demand; If satisfy; Then these tunnel groups of related information symphysis are become the tunnel to set up request, and the request of setting up of this tunnel is carried in the HSAPN control message, this HSAPN control message is sent to next node B according to tunnel path.
In the present embodiment, source node needed carry out the access detection according to the bandwidth demand that gets access to before sending tunnel foundation request equally; Whether the idle bandwidth of promptly judging self can satisfy this bandwidth demand, if can satisfy, then reserves the corresponding bandwidth resource at self immediately; And send the tunnel to downstream node and set up request; If can not satisfy, then, represent that self can't provide enough bandwidth directly to control and management equipment feedback error information.
202, intermediate node receives the tunnel and sets up request;
Intermediate node B receives the HSAPN control messages from source node A, and from this control messages, obtains the tunnel and set up request, and this tunnel is set up in the request can also comprise the reservation mode field; This field is used in reference to the follow-up mode of being taked when carrying out RSVP that is shown in; Specifically can be fixed form, or sharing mode, fixed form is and fixedly takies certain bandwidth; This bandwidth only supplies current business to use, and sharing mode is the bandwidth of reservation and can shares according to occupancy and other are professional.
Need to prove; Follow-up tunnel is set up in the request can carry the mode that this reservation mode field is used to indicate RSVP equally; But this field and inessential field; If system is merely able to take fixedly reservation mode or shared reservation mode when when making up, confirming to set up the tunnel in the native system, then can not need this field.
203, judge that whether access detects successful, if success then carries out 205, if unsuccessful, then carries out 204;
Intermediate node B checks at first whether requested data format is set up in this tunnel correct after getting access to the tunnel request of setting up, if correct, then set up the request from this tunnel again and obtain bandwidth demand, and judge whether the idling-resource of self node satisfies bandwidth demand.
In the present embodiment; The detection tunnel is set up requested data format and is comprised detecting this tunnel sets up in the request whether comprised necessary tunnel relevant information; It is understandable that, in practical application, if can guarantee reliability of data transmission; Can the data form not detected, and directly whether the idling-resource of detection node satisfies bandwidth demand.
204, execute exception handling process, and process ends;
If carrying out access, intermediate node B detects failure; Execute exception handling process then, for example intermediate node B detects the tunnel to set up requested data format incorrect, or the intermediate node B idle bandwidth that detects self node can not satisfy the tunnel and sets up the bandwidth demand in the request; Then can the execute exception handling process; Whether concrete abnormality processing flow process can by the foundation that source node A judges whether to stop current tunnel, perhaps be retransmitted the tunnel and set up request for to source node A feedback error information.
205, send the tunnel according to tunnel path to next node and set up request and bandwidth resource until arriving destination node;
In the present embodiment, intermediate node B detects the resource requirement of setting up in the request according to the tunnel back through access and reserves the corresponding bandwidth resource, and the tunnel path of setting up in the request according to the tunnel is provided with the routing table among the intermediate node B or sets up label swap table and distributing labels; Include only the node adjacent in this routing table with intermediate node B; Be intermediate node C and source node A, and send the tunnel according to tunnel path A-B-C-D to next node C and set up request that the request of setting up of this tunnel can be to set up request from the tunnel that source node A receives; Be that intermediate node B directly will be forwarded to intermediate node C from the tunnel request of setting up that source node A receives; The request of setting up of this tunnel can also be regenerated by intermediate node B, also comprises a parameter in the request if the tunnel is set up: node identification is used to the node of indicating the request of setting up of current tunnel also need pass through; The node identification of then setting up the request from the tunnel that source node A sends is B; C, D is after intermediate node B; Intermediate node B is revised as C with this node identification; D, and regenerate the tunnel request of setting up, other tunnel relevant informations that this tunnel is set up in the request are all consistent with other tunnel relevant informations during the tunnel foundation that source node A sends is asked; Be that the tunnel request of setting up that intermediate node B generates is used to set up the tunnel equally, but the content that comprises in the tunnel that its content that comprises and source node A the generate foundation request is different.
Intermediate node B and C set up according to tunnel path transmission tunnel and ask, and arrive destination node D until this request, and destination node D receives after this tunnel foundation request, obtains node identification wherein, can know certainly as destination node.
Need to prove; Above-mentioned intermediate node C and destination node D need carry out access equally and detect; After detecting successfully, access need reserve corresponding bandwidth at the bandwidth demand that this intranodal is set up in the request according to the tunnel equally; Intermediate node C also need be provided with routing table or set up label swap table and distributing labels simultaneously, and is unsuccessful if access detects, and needs the execute exception handling process equally.
206, response is set up in destination node and intermediate node feedback tunnel;
The corresponding bandwidth resource is reserved in the resource requirement that destination node D sets up in the request according to the tunnel in destination node D inside after detecting through access; And send the tunnel according to tunnel path to even higher level of node and set up response, this tunnel is set up response and is sent to intermediate node C.
Intermediate node C sends the tunnel to intermediate node B equally and sets up response after receiving tunnel foundation response, is sent to source node A until this tunnel foundation response.
207, source node sends the tunnel acknowledge message to accomplish tunnel foundation.
Source node A sends the tunnel acknowledge message to intermediate node B after response is set up in the tunnel that receives intermediate node B forwarding; This tunnel acknowledge message is sent to destination node D after passing through intermediate node B and intermediate node C according to tunnel path, and so far packet network tunnel is set up and accomplished.
Above-mentioned tunnel can be a unidirectional tunnel, also can be bidirectional tunnel, and promptly after completion was set up in the tunnel, A can pass through B, and C and D carry out communication, and D also can pass through C simultaneously, and B and A carry out communication.
Need to prove that step 207 is an optional step, promptly can carry out also in actual applications and can not carry out.
Foregoing description the process set up of tunnel, in practical application, still possibly have some processing after the tunnel is set up and accomplished to this tunnel, the for example maintenance in tunnel and the error notification in the tunnel specify below:
1, tunnel maintenance:
Concrete tunnel maintenance can comprise dual mode in the present embodiment:
1.1, periodic maintenance:
In this mode; Each node router carries out periodic refreshing according to the cycle of presetting (for example whenever carrying out once at a distance from 1 minute); Promptly send the tunnel to downstream node and set up request or the foundation response of upstream nodes transmission tunnel; And wait for that tunnel foundation request and tunnel foundation that other node routers send respond; If (for example 3 minutes) do not receive that request is set up in tunnel that other node routers send or response is set up in the tunnel in the sense cycle that presets, confirm that then current tunnel is disconnected, then delete the bandwidth resources of reserving in self node router.
1.2, passive maintenance:
In this mode; Each node router can not detect the tunnel situation voluntarily, but request is removed in the tunnel that other node routers of passive wait send, and this tunnel tear down message can be initiated by source node A; Also can initiate, can also initiate by intermediate node B or C by destination node D.
If initiate by source node A; Then the request of removing of this tunnel can be according to the tunnel path order through intermediate node B; C and destination node D; After intermediate node B receives this tunnel dismounting request; Transmit this request to intermediate node C; And deleting self node reserved resource and routing table, intermediate node C carries out same operation, until arriving destination node D;
If initiate by destination node D; Then the request of removing of this tunnel can be according to the tunnel path order through intermediate node C; B and source node A; After intermediate node C receives this tunnel dismounting request; Transmit this request to intermediate node B; And deleting self node reserved resource and routing table, intermediate node B carries out same operation, until arriving source node A;
If initiated by intermediate node B, then the request of removing of this tunnel can be according to tunnel path order net of justice source node A and intermediate node C simultaneously, and is sent to destination node D through intermediate node C, and each node is deleted the bandwidth resources that self node is reserved equally.
2, error notification:
In the repeating process that the tunnel is set up in the repeating process of asking or tunnel foundation responds, if error of transmission occurs, then need carry out error notification,
If in the repeating process of tunnel foundation request, error of transmission occurs; Then recipient's node is set up request error message according to tunnel path to superior node feedback tunnel; The final source node that arrives; And by source node decision processing mode; Can be for resending; Or stop to set up tunnel or other processing modes;
If in the repeating process of tunnel foundation response, error of transmission occurs; Then recipient's node is set up the response error message according to tunnel path to downstream site feedback tunnel; The final destination node that arrives; And by destination node decision processing mode; Can be for resending; Or stop to set up tunnel or other processing modes.
The process that packet network tunnel is set up has been described in the foregoing description; Source node sends the tunnel to downstream node according to the tunnel path that presets and sets up request until the node that achieves the goal; Downstream node is according to tunnel foundation request bandwidth resource and to the source node feedback response; So can generate the tunnel automatically according to actual conditions, and not need manual work that node is configured, therefore improve the efficient that the tunnel is handled among the HSAPN.
The tunnel of describing among above-mentioned two embodiment is set up in the request and is all carried the tunnel path that presets; Be that each intermediate node can be set up the node that the tunnel path of carrying in the request is confirmed the required process in whole tunnel according to the tunnel; Thereby confirm self a last node and next node, it is understandable that, in practical application; Can adopt other a kind of mode equally; Promptly use the destination node address to substitute the mode of tunnel path, set up in the tunnel and carry the address of destination node in the request and do not carry tunnel path, source node and each intermediate node can both go out well-determined tunnel path through the address computation of this destination node; Concrete computational methods are: source node or intermediate node are set up the request from the tunnel and are obtained the destination node address; And confirm the structure of this destination node address, according to the information of the corresponding next node of the structure of this destination node address of corresponding relation inquiry of presetting, and the tunnel request of setting up is sent to this next node according to the information of the next node that inquires.
The scheme of concrete static routing can be used for the process of setting up in main tunnel, but not the scheme of static routing (promptly set up in the request in the tunnel and carry tunnel path) can be used for the process of setting up of over run tunnel.
In the face of the communication system embodiment in the embodiment of the invention describes, see also Fig. 3 down, communication system embodiment comprises in the embodiment of the invention:
Source node 301, intermediate node 302 and destination node 303;
Wherein, source node 301 is used to carry out access and detects, and after access detects, sets up request and tunnel acknowledge message through intermediate node 302 to destination node 303 transmission tunnels, and response is set up in the tunnel that receives intermediate node 302 and destination node 303 feedbacks;
Intermediate node 302 is used for carrying out access based on the tunnel foundation request that receives and detects, if through detection, then transmits said tunnel to destination node 303 and sets up request, sets up based on the tunnel and asks to carry out resource reservation, sets up response to source node 301 feedback tunnels;
Destination node 303 is used for carrying out access based on the tunnel foundation request that receives and detects, and as if passing through detection, then based on the tunnel request of setting up carrying out resource reservation, and foundation responds to source node 301 feedback tunnels to pass through intermediate node 302.
In the foregoing description, intermediate node 302 can also be provided with routing table or set up label swap table and distributing labels.
Can not comprise intermediate node 302 equally in the foregoing description.
See also Fig. 4, one embodiment comprises of network node in the embodiment of the invention:
Request generation unit 401 is set up in the tunnel, is used for generating the tunnel according to the tunnel relevant information and sets up request;
Request transmitting unit 402 is set up in the tunnel, is used for sending to downstream node the tunnel and sets up the tunnel foundation request that request generation unit 401 generates;
The tunnel is set up and is responded receiving element 403, is used for the tunnel foundation that the said downstream node of reception sends after the tunnel is set up request transmitting unit 402 to send tunnel foundation request to downstream node and responds;
In addition, can also comprise tunnel acknowledge message transmitting element 404, be used for after the tunnel foundation response that responds receiving element 403 reception downstream nodes transmissions is set up in the tunnel, sending the tunnel acknowledge message to downstream node with the foundation of completion tunnel.
Network node first embodiment of foregoing description can be source node.
See also Fig. 5, another embodiment of network node comprises in the embodiment of the invention:
Request receiving element 501 is set up in the tunnel, is used to receive the tunnel foundation request that upstream node sends;
Access control unit 502 is used for setting up the tunnel request of setting up of asking receiving element 501 to receive according to the tunnel and carries out the access detection;
Control unit 503 is set up in the tunnel, is used for bandwidth resource and sets up routing table or set up label swap table and distributing labels;
Request retransmission unit 504 is set up in the tunnel, is used for after access detects successfully, transmitting to downstream node the tunnel and sets up request;
Response process unit 505 is set up in the tunnel, be used to receive the tunnel and set up response, and upstream nodes is transmitted this tunnel foundation response.
In the present embodiment; Control unit 503 is set up in the tunnel can be bandwidth resource after access detects successfully and set up routing table or set up label swap table and distributing labels, also can the tunnel set up response process unit 505 receive the tunnel set up response after bandwidth resource and set up routing table or set up label swap table and distributing labels again.
Network node second embodiment of foregoing description can be intermediate node; Do not set up request retransmission unit 504 if do not comprise the tunnel in the above-described embodiments; And the tunnel is set up response process unit 505 and is used to send tunnel foundation response; And the tunnel is set up control unit 503 and is used for bandwidth resource, and then this embodiment can also be destination node.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to accomplish through program; Described program can be stored in a kind of computer-readable recording medium; This program comprises the steps: when carrying out
Receive the tunnel foundation request that upstream node sends, said tunnel is set up in the request and is comprised bandwidth demand;
Carry out access according to the foundation request of said tunnel and detect,, then carry out resource reservation, and set up response to said upstream node transmission tunnel according to said bandwidth demand if successful.
The above-mentioned storage medium of mentioning can be a read-only memory, disk or CD etc.
More than a kind of method for processing packet network tunnel provided by the present invention and communication system and relevant device have been carried out detailed introduction; For one of ordinary skill in the art; Thought according to the embodiment of the invention; The part that on embodiment and range of application, all can change, in sum, this description should not be construed as limitation of the present invention.
Claims (21)
1. a method for processing packet network tunnel is characterized in that, comprising:
Receive the tunnel foundation request that upstream node sends, said tunnel is set up in the request and is comprised bandwidth demand;
The access detection is carried out in the request of setting up according to said tunnel, and as if success, then carry out resource and postpone to reserve according to said bandwidth demand, and to said upstream node transmission tunnel foundation response;
Said resource postpones to reserve in order to represent intermediate node or destination node after all the node accesses detect successfully, just sets up request reservation corresponding bandwidth resource at this intranodal according to the tunnel.
2. method according to claim 1 is characterized in that, said step of asking to carry out the access detection according to the foundation of said tunnel comprises:
Judge whether requested data format is set up in the tunnel receive correct, if correct, judge then whether the idle bandwidth of self node satisfies said bandwidth demand,, confirm that then access detects successfully if satisfy.
3. method according to claim 1 is characterized in that, the step that request is set up in the tunnel that said reception upstream node sends comprises before:
Source node receives the tunnel relevant information that control and management equipment sends, and said tunnel relevant information comprises bandwidth demand and the tunnel path that presets;
Source node is set up request according to the tunnel that said tunnel relevant information generates the tunnel path that comprises said bandwidth demand and preset;
Source node sends the foundation request of said tunnel based on said tunnel path to the intermediate node of correspondence.
4. method according to claim 1 is characterized in that, the step that request is set up in the tunnel that said reception upstream node sends comprises before:
Source node receives the tunnel relevant information that control and management equipment sends, the destination node address that said tunnel relevant information comprises bandwidth demand and presets;
Source node is set up request according to the tunnel that said tunnel relevant information generates the destination node address that comprises said bandwidth demand and preset;
Source node sends the foundation request of said tunnel according to said destination node address to the intermediate node of correspondence.
5. method according to claim 4 is characterized in that, said source node sends said tunnel according to said destination node address to the intermediate node of correspondence and sets up the step of request and comprise:
Source node obtains the structure of said destination node address;
Inquire about the information of the corresponding intermediate node of the structure of said destination node address according to the corresponding relation that presets;
Information based on said intermediate node is sent the foundation request of said tunnel to the intermediate node of correspondence.
6. method according to claim 3 is characterized in that, said source node sends said tunnel according to said tunnel path to the intermediate node of correspondence and comprises after setting up the step of request:
Intermediate node is set up according to said tunnel and is asked to carry out the access detection, if success, the tunnel path of then setting up in asking according to said tunnel is transmitted the foundation request of said tunnel to destination node;
Carry out resource reservation according to said bandwidth demand;
The routing table of self is set or sets up label swap table and distributing labels according to said tunnel path.
7. method according to claim 4 is characterized in that, said source node sends said tunnel according to said tunnel path to the intermediate node of correspondence and comprises after setting up the step of request:
Intermediate node is set up based on said tunnel and is asked to carry out the access detection, if success, then the foundation request of said tunnel is transmitted to destination node in the destination node address of setting up in asking based on said tunnel;
Carry out resource reservation according to said bandwidth demand.
8. method according to claim 6 is characterized in that, saidly comprises after the routing table of self being set or setting up the step of label swap table and distributing labels according to said tunnel path:
Response is set up in the tunnel that receives the destination node feedback;
Upstream node to said intermediate node feeds back the foundation response of said tunnel.
9. method according to claim 7 is characterized in that, saidly carries out comprising after the step of resource reservation according to said bandwidth demand:
Response is set up in the tunnel that receives the destination node feedback;
Upstream node to said intermediate node feeds back the foundation response of said tunnel.
10. method according to claim 3 is characterized in that, said source node sends said tunnel according to said tunnel path to the intermediate node of correspondence and comprises after setting up the step of request:
Intermediate node is set up according to said tunnel and is asked to carry out the access detection, if success, the tunnel path of then setting up in asking according to said tunnel is transmitted the foundation request of said tunnel to destination node;
Response is set up in the tunnel that receives the destination node feedback;
Carry out resource reservation according to said bandwidth demand;
The routing table of self is set or sets up label swap table and distributing labels according to said tunnel path;
Upstream node to said intermediate node feeds back the foundation response of said tunnel.
11. method according to claim 4 is characterized in that, said source node sends said tunnel according to said destination node address to the intermediate node of correspondence and comprises after setting up the step of request:
Intermediate node is set up based on said tunnel and is asked to carry out the access detection, if success, then the foundation request of said tunnel is transmitted to destination node in the destination node address of setting up in asking based on said tunnel;
Response is set up in the tunnel that receives the destination node feedback;
Carry out resource reservation according to said bandwidth demand;
Upstream node to said intermediate node feeds back the foundation response of said tunnel.
12., it is characterized in that said intermediate node is set up the step of asking to carry out the access detection according to said tunnel and comprised according to each described method in the claim 3 to 6:
Intermediate node judges whether requested data format is set up in the tunnel receive correct, if correct, judges then whether the idle bandwidth of self node satisfies said bandwidth demand, if satisfy, confirms that then access detects successfully.
13. method according to claim 11 is characterized in that, saidly feeds back said tunnel to said upstream node and comprises after setting up the step of response:
Source node sends the tunnel acknowledge message through intermediate node to destination node.
14. method according to claim 1 is characterized in that, said method also comprises: said tunnel is safeguarded.
15. method according to claim 14 is characterized in that, the said step that said tunnel is safeguarded comprises:
Send the tunnel according to the refresh cycle of presetting to other nodes and set up request or tunnel foundation response; Whether judgement receives the tunnel foundation request and the tunnel of other nodes transmissions and sets up response message in the sense cycle that presets; If do not receive, then delete the bandwidth resources of reserving in self node;
Or
The tunnel deletion request that the reception sources node sends;
Discharge the bandwidth resources of self reserving based on the deletion request of said tunnel.
16. a communication system is characterized in that, comprising:
Source node is used to carry out access and detects, and sends the tunnel and sets up request and tunnel acknowledge message, receives the tunnel and sets up response;
Intermediate node is used for carrying out access based on the tunnel foundation request that receives and detects, if through detection, then transmits said tunnel to destination node and sets up request, based on the tunnel request of setting up carrying out resource reservation, feeds back the tunnel to source node and sets up response;
Destination node is used for based on the tunnel that receives the request of setting up and carries out access and detect, if through detecting, then the request of setting up is carried out resource and postponed to reserve based on the tunnel, and sets up response through said intermediate node to said source node feedback tunnel;
Said resource postpones to reserve in order to represent destination node after all the node accesses detect successfully, just sets up request reservation corresponding bandwidth resource at this intranodal based on the tunnel.
17. communication system according to claim 16 is characterized in that, said intermediate node also is used to routing table is set or set up label swap table and distributing labels.
18. a network node is applied to it is characterized in that in the packet network, comprising:
The request receiving element is set up in the tunnel, is used to receive the tunnel foundation request that upstream node sends;
The access control unit is used for setting up the tunnel request of setting up of asking receiving element to receive according to said tunnel and carries out the access detection;
Control module is set up in the tunnel, is used to postpone bandwidth resource, and said delay bandwidth resource is just set up request reservation corresponding bandwidth resource at this intranodal based on the tunnel in order to represent intermediate node or destination node after all the node accesses detect successfully;
The response process unit is set up in the tunnel, is used for upstream nodes and sends tunnel foundation response.
19. network node according to claim 18 is characterized in that,
Control unit bandwidth resource after access detects is successfully set up in said tunnel;
Or
Control unit bandwidth resource when sending tunnel foundation response is set up in said tunnel.
20. network node according to claim 19 is characterized in that, said tunnel is set up control unit and also is used to routing table is set or set up label swap table and distributing labels.
21. network node according to claim 19 is characterized in that, said network node also comprises:
The request retransmission unit is set up in the tunnel, is used for after access detects successfully, transmitting to downstream node the tunnel and sets up request.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810000805A CN101494587B (en) | 2008-01-22 | 2008-01-22 | Method for processing packet network tunnel and communication system as well as relevant equipment |
| PCT/CN2009/070234 WO2009094933A1 (en) | 2008-01-22 | 2009-01-21 | Method for processing the packet network tunnel, communication system, and apparatus thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810000805A CN101494587B (en) | 2008-01-22 | 2008-01-22 | Method for processing packet network tunnel and communication system as well as relevant equipment |
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| CN101494587A CN101494587A (en) | 2009-07-29 |
| CN101494587B true CN101494587B (en) | 2012-08-29 |
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| CN200810000805A Expired - Fee Related CN101494587B (en) | 2008-01-22 | 2008-01-22 | Method for processing packet network tunnel and communication system as well as relevant equipment |
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| WO (1) | WO2009094933A1 (en) |
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| CN101984595B (en) * | 2010-11-03 | 2012-08-15 | 北京星网锐捷网络技术有限公司 | Method, system and device for building trans-regional flow engineering tunnel |
| CN112217655B (en) * | 2019-07-11 | 2022-08-02 | 奇安信科技集团股份有限公司 | Network equipment configuration method and device in SD-WAN system and computer equipment |
| WO2021168758A1 (en) * | 2020-02-27 | 2021-09-02 | 华为技术有限公司 | Pcie-based communication method and apparatus |
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| WO2000031929A2 (en) * | 1998-11-25 | 2000-06-02 | Enron Warpspeed Services,Inc. | Method and apparatus for providing guaranteed quality/class of service within and across networks using existing reservation protocols and frame formats |
| CN1679017A (en) * | 2002-09-03 | 2005-10-05 | 汤姆森特许公司 | Mechanism for providing quality of service in a network utilizing priority and reserved bandwidth protocols |
| CN1848804A (en) * | 2005-08-12 | 2006-10-18 | 华为技术有限公司 | Data message transmitting method and node equipment based on MPLS TE tunnel |
| CN101030914A (en) * | 2007-03-31 | 2007-09-05 | 华为技术有限公司 | Method for assuring second-level runner public-network bandwidth, its route and system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2901943B1 (en) * | 2006-06-06 | 2008-12-12 | Canon Kk | A RESOURCE RESERVATION METHOD WHEN TRANSMITTING CONTENT IN A COMMUNICATION NETWORK, COMPUTER PROGRAM PRODUCT, STORAGE MEDIUM, AND CORRESPONDING DEVICE |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000031929A2 (en) * | 1998-11-25 | 2000-06-02 | Enron Warpspeed Services,Inc. | Method and apparatus for providing guaranteed quality/class of service within and across networks using existing reservation protocols and frame formats |
| CN1679017A (en) * | 2002-09-03 | 2005-10-05 | 汤姆森特许公司 | Mechanism for providing quality of service in a network utilizing priority and reserved bandwidth protocols |
| CN1848804A (en) * | 2005-08-12 | 2006-10-18 | 华为技术有限公司 | Data message transmitting method and node equipment based on MPLS TE tunnel |
| CN101030914A (en) * | 2007-03-31 | 2007-09-05 | 华为技术有限公司 | Method for assuring second-level runner public-network bandwidth, its route and system |
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| CN101494587A (en) | 2009-07-29 |
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