CN101924702A - Service data transmission method and device - Google Patents
Service data transmission method and device Download PDFInfo
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- CN101924702A CN101924702A CN 201010268779 CN201010268779A CN101924702A CN 101924702 A CN101924702 A CN 101924702A CN 201010268779 CN201010268779 CN 201010268779 CN 201010268779 A CN201010268779 A CN 201010268779A CN 101924702 A CN101924702 A CN 101924702A
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Abstract
The embodiment of the invention discloses a service data transmission method and a device. The service data transmission method comprises the following steps: obtaining pre-configured time slot resource information of a switching network for service; obtaining a service data unit which carries a service identifier; determining time slot resources of the switching network of the service data unit according to the service identifier and the pre-configured time slot resource information of the switching network for the service; and sending the service data unit to the switching network in the corresponding time slot according to the determined time slot resources of the switching network. A transmitting node in the scheme pre-configures the time slot resources of the switching network for the service, and the service can be sent according to the service identifier carried in the service data unit and the pre-configured time slot resources of the switching network for the service after obtaining the service data unit. The application of the technical scheme provided by the embodiment of the invention can effectively ensure the jitter performance of the service.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of service data transmission method and device.
Background technology
Along with the development of wireless technologys such as 3G, the interface of wireless base station from the E1 interface in 2G epoch progressively to FE and the transition of GE interface, type of service also from Circuit Service progressively to the Packet Service transition.But in real network, traditional Circuit Service is still with long-term existence, and transmission network must be supported Circuit Service and Packet Service simultaneously, with respect to Packet Service, Circuit Service is relatively more responsive for shake usually, should note guaranteeing professional jitter performance when handling.
Wireless backhaul network had both comprised optical-fiber network, also comprised microwave network, and they realize the passback of mobile service jointly.Microwave network generally is used for last several jumper connections of base station side goes into, and very general application is arranged in network.On physical media, microwave and optical fiber are very different, and microwave generally is used to handle the environment that relatively exposes, and it is bigger that transmission is influenced by environmental change, show that its interface rate can often change; Optical fiber then is used to handle enclosed environment, and the transmission rate height is not affected by environment substantially.
Though existing MSTP platform based on the SDH/SONET technology has the multi-service disposal ability, existing MSTP platform adopts independent switching network respectively for Packet Service and Circuit Service, so cost is higher.
Summary of the invention
For solving the problems of the technologies described above, the embodiment of the invention provides a kind of service data transmission method and device, to realize that the packet switching network under adaptive bandwidth scenes such as microwave, still can guarantee professional jitter performance.Technical scheme is as follows:
The embodiment of the invention provides a kind of service data transmission method, comprising:
Obtain to be professional pre-configured switching network time interval resource information;
Obtain Service Data Unit, carry service identification in the described Service Data Unit;
According to described service identification and described be professional pre-configured switching network time interval resource information, determine the switching network time interval resource of described Service Data Unit;
According to determined switching network time interval resource, described Service Data Unit is sent to switching network in time slot corresponding.
The embodiment of the invention also provides a kind of business data transmission device, comprising:
The time interval resource configuration module is used to obtain be the pre-configured switching network time interval resource information of business;
Business datum obtains module, is used to obtain Service Data Unit, carries service identification in the described Service Data Unit;
The time interval resource determination module is used for according to described service identification and describedly is professional pre-configured switching network time interval resource information, determines the switching network time interval resource of described Service Data Unit;
The first business datum sending module is used in time slot corresponding described Service Data Unit being sent to switching network according to determined switching network time interval resource.
The technical scheme that the embodiment of the invention provided, transmission node is business configuration switching network time interval resource in advance, after obtaining Service Data Unit, the service identification that carries according to Service Data Unit and be the switching network time interval resource of professional configuration in advance sends processing to business.Use the technical scheme that the embodiment of the invention provided, can effectively guarantee professional jitter performance, and Packet Service can adopt identical switching network to transmit with Circuit Service, therefore also effectively reduce the realization cost.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do simple the introduction to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the network application scene schematic diagram of the embodiment of the invention;
Fig. 2 is the service data transmission method flow chart of the embodiment of the invention;
Fig. 3 is the schematic diagram of the use GFP encapsulation of the embodiment of the invention;
Fig. 4 is use GFP when encapsulation switching network time slot configuration schematic diagram of the embodiment of the invention;
Fig. 5 is that use GFP when encapsulation switching network time slot of the embodiment of the invention is adjusted schematic diagram;
Fig. 6 is the schematic diagram of the use PWE3 encapsulation of the embodiment of the invention;
Fig. 7 is use PWE3 when encapsulation switching network time slot configuration schematic diagram of the embodiment of the invention;
Fig. 8 is that use PWE3 when encapsulation switching network time slot of the embodiment of the invention is adjusted schematic diagram;
Fig. 9 is the structural representation of the business data transmission device of the embodiment of the invention;
Figure 10 is the another kind of structural representation of the business data transmission device of the embodiment of the invention;
Figure 11 is the structural representation of the time interval resource configuration module of the embodiment of the invention;
Figure 12 is the third structural representation of the business data transmission device of the embodiment of the invention;
Figure 13 is the 4th a kind of structural representation of the business data transmission device of the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Figure 1 shows that the network application scene schematic diagram of the embodiment of the invention, customer service is transmitted by the connection on the microwave node 101,102,103, wherein node 101 and node 103 are fringe node, can be professional up and down, node 102 is in one or more intermediate nodes on the switching path, is used for professional transparent transmission; Intra-node is all by the exchanges data between a switching network realization an outpost of the tax office and Line cards or Line cards and the Line cards.
Last professional fringe node, node 101 for example shown in Figure 1 carries out encapsulation process to the business that inserts, and obtains Service Data Unit, carries service label in Service Data Unit, to realize the differentiation of different business.Service Data Unit is forwarded to outbound port at fringe node 101 after switching network is handled, then by one or more intermediate nodes, node 102 for example shown in Figure 1, be forwarded to down professional fringe node, node 103 for example shown in Figure 1,103 pairs of data cells that receive of node are carried out decapsulation and are obtained original business datum.On last professional fringe node and each intermediate node, professional can the processing to realize the forwarding from the input port to the output port through switching network, Service Data Unit enters from the incoming line card and can cut into slices before the switching network so that switching network is handled, and recovers Service Data Unit and sends in the output line card assembling of cutting into slices.
Certainly, shown in Figure 1 only is a kind of representative network application scenarios schematic diagram of the embodiment of the invention, is understandable that, professional also can be without the forwarding of intermediate node, from the fringe node of the fringe node business of directly sending to down of last business.
The embodiment of the invention provides a kind of service data transmission method, is applicable to that intra-node is sent to switching network processing before with business, and referring to shown in Figure 2, this method may further comprise the steps:
S201 obtains to be the pre-configured switching network time interval resource information of business;
S202 obtains Service Data Unit, carries service identification in the described Service Data Unit;
S203, according to described service identification and described be professional pre-configured switching network time interval resource information, determine the switching network time interval resource of described Service Data Unit;
S204 carries out slicing treatment to described Service Data Unit, and according to determined switching network time interval resource, in time slot corresponding the section of described Service Data Unit is sent to switching network.
In other embodiments, also can Service Data Unit not carried out slicing treatment, for example the length of Service Data Unit is than can not carrying out slicing treatment under the little situation of slice length.
In said method, node is business configuration switching network time interval resource in advance, in order to guarantee professional jitter performance, can be the fixing switching network time interval resource of each jitter-sensitive business configuration, receive the data cell of jitter-sensitive business when node after, according to pre-configured fixedly time slot its section is sent, thereby guaranteed jitter performance.
For non-jitter-sensitive business, can not be the fixing switching network time interval resource of its configuration, if node has received non-jitter-sensitive Service Data Unit, can be chosen in and distributed the not afoul time slot of switching network time interval resource, promptly, non-jitter-sensitive Service Data Unit section is sent to switching network with the not afoul time slot of the professional transmission of jitter-sensitive.
In other embodiments, also can non-jitter-sensitive Service Data Unit not carried out slicing treatment, for example, the length of non-jitter-sensitive Service Data Unit is than can not carrying out slicing treatment under the little situation of slice length.
In microwave network, the transmission rate of node may change according to environment, in embodiments of the present invention, when transmission rate changes, node is a business configuration switching network time interval resource according to the transmission rate result of variations again, thereby guarantees the correct transmission of jitter-sensitive business.
Because node can directly obtain service identification from Service Data Unit, therefore the service identification here is explicit for node, node can directly come business is distinguished according to service identification, in microwave network, microwave link speed can change according to environment, the time slot position that TDM enters ply-yarn drill also can respective change, therefore can't distinguish different business by the TDM time slot position.
Below in conjunction with two specific embodiments, technical scheme of the present invention is described in further detail.
Embodiment one: Fig. 3, Fig. 4 and Fig. 5 have described a specific embodiment based on the GFP packaged type.
As Fig. 4 and the described network scenarios of Fig. 5, node 401 and node 405 are professional up and down fringe node, and the transmission of business datum between node 401 and node 405 can be passed through a plurality of intermediate nodes, i.e. node 402, node 403 and node 404.Here suppose between node 402 and the node 403, the link between node 403 and the node 404 is microwave link.After business datum is encapsulated as the Service Data Unit that carries label information at last service node, and exchange to outbound port by switching network according to label information, can be packaged into a big block multiple connection frame structure again at a plurality of Service Data Units of outbound port, the multiple connection frame that forms can periodically send on outgoing interface continuously; After intermediate node receives the multiple connection frame, therefrom parse a plurality of Service Data Units, and Service Data Unit is exchanged to outbound port according to the label information that carries in the Service Data Unit, can be packaged into a big multiple connection frame again at a plurality of Service Data Units of outbound port, the multiple connection frame that forms can periodically send on outgoing interface continuously; After following service node receives the multiple connection frame, therefrom parse a plurality of Service Data Units, and Service Data Unit exchanging to down service port according to the label information that carries in the Service Data Unit, the decapsulation Service Data Unit obtains original business datum on service port down.Service node, intermediate node and following service node be at the processing basically identical of ply-yarn drill and switching network part in this process, below above service node be that example is described particularly and encapsulated and the processing of switching network processing section.
When last service node 401 receives business, all carry out GFP (Generic Framing Procedure, Generic Framing Procedure) encapsulation for grouping message or TDM frame (as E1), obtain Service Data Unit.As shown in Figure 3, in the Extension of GFP encapsulation format header (extension header) part, carry service label Label, be used for identification service, realize the differentiation between different business.In Extension header, can also carry service priority information Priority information.CoS among the Extension header can be used to refer to type of service, is that the jitter-sensitive business also is non-jitter-sensitive business with differentiated service, in addition, also can utilize the PTI of GFP encapsulation partly to come the indicating services type.
In last professional fringe node and the intermediate node that need transmit Service Data Unit, be business configuration switching network time interval resource in advance.As shown in Figure 4, be example with intermediate node 403, on node 403, set up the time slot allocation table in advance by business to be processed, here the time slot allocation table is integrated in and transmits, professional outbound port is shown in the Out tabulation in the table.For partial service, as the responsive type service of delay variations such as CBR, TDM, voice, the time interval resource position in the exchange cycle of in switching network, fixing for its configuration.Here exchange cycle can be configured to the transmission cycle of multiple connection frame on the interface, for example sends the situation of 8000 block frames for per second, then exchange cycle is configured to the 1/8000=125 microsecond.Each exchange cycle is divided into continuous time slot of the same size unit, and for example each time slot cell size is set to every required time of transmission 1 byte data.As shown in Figure 4, be 100 business for label, configuration time slot starting position is 800, take number of timeslots is 8, promptly disposing switching network time interval resource position is 800～807; For label is 300 business, and the time slot starting position is 1050, take number of timeslots is 10, and promptly disposing the time interval resource position is 1050～1059, and certainly, institute's distributed time slot resource location also can disperse, as long as ensure the jitter performance of business.And for non-jitter-sensitive class business, for example label is 200 and 400 business, need not to dispose the switching network time interval resource.This pre-configured switching network time interval resource can be finished by manual configuration, also can finish by automatic configuration.Auto configuration mode can automatically be realized the switching network resource distribution in node when node receives the Service Data Unit of a certain business first.Here be the operation that example illustrates automatic configuration with node 403: node receives Service Data Unit, extracts service label, type of service and data unit length information; If type of service is a jitter-sensitive class business, the list item of inquiry business label correspondence in the time slot allocation table then; If corresponding list item does not distribute the switching network resource information,, and be configured in the time slot allocation table then according to data unit length information distribution switching network resource information.In the present embodiment, described service label, type of service and data unit length information all are carried in the GFP head.In general, the length of the Service Data Unit of same jitter-sensitive class business is fixed, but also have less change in some cases, this moment is excessive as if the length that receives Service Data Unit, required switching network time slot more then upgrades time slot allocation according to the length of the Service Data Unit that receives.In addition, also can be the traffic assignments time slot more time interval resource more required, realize tolerance for difference on the frequency XOR data unit length change between the node than Service Data Unit length.Be the E1 data cell of 32 bytes (not counting expense) for example, can dispose and transmit the required time interval resource of 33～35 bytes (not counting expense), reserve a small amount of time interval resource at time slot starting position and time slot end position and be used to realize tolerance for length.
Node is behind the Service Data Unit that obtains local encapsulation or upstream node transmission, and inquiry is transmitted according to service label, obtains and corresponding outbound port information of this Service Data Unit and gap information; For the pre-configured Service Data Unit of switching network time interval resource, label for example shown in Figure 4 is 100 and 300 Service Data Unit, earlier buffer memory is put in the section of Service Data Unit, sends to corresponding outbound port behind the assigned timeslot of waiting to delay time.And for the Service Data Unit of unallocated gap information, label for example shown in Figure 4 is 200 and 400 Service Data Unit, after inquiry is transmitted and obtained outbound port information, the section of its Service Data Unit is sent to corresponding outbound port at the time slot that is not assigned with.For example, before sending, can judge current required time slot or time slot interval whether with distribute time slot collision, if, then buffer memory is put in the Service Data Unit section, delaying time sends with distributing the not afoul time slot of time slot again; If not, then can send immediately.
At the outbound port place, a plurality of Service Data Units are put into the multiple connection frame send.Here the multiple connection frame is in strict accordance with periodically sending, as per second 8000 frames.
If link rate changes, for example, the microwave link between node 403 and node 404 is owing to Changes in weather or other factors, and when causing link rate to change, node 403 carries out following operation:
S301 obtains the microwave link speed between present node 403 and the node 404;
S302 according to current microwave link speed, in conjunction with each professional bandwidth resources demand, calculates the time slot allocation strategy that makes new advances;
S303 according to the new time slot allocation policy update time slot allocation table that calculates, carries out Service Data Unit according to the time slot allocation table that upgrades and handles.
Particularly, Fig. 5 has described the time slot allocation table after upgrading, and adjusts the result and is: for service label is 100 business, because the bandwidth resources deficiencies, and its priority is lower, with the switching network time slot of not reallocating fixing; For service label is 300 business, for the switching network time slot position of its distribution is changed to 300～309.
With a plurality of Service Data Units put into multiple connection frame and send at the outbound port place this moment.Here the multiple connection frame is still in strict accordance with periodically sending, as per second 8000 frames.Just this moment, the length of every frame diminished because speed reduces.
Another kind of processing method when link rate changes can be not change switching network time slot allocation strategy, but sending time slots allocation strategy on the ply-yarn drill at change outgoing interface place.This processing mode requires in the scheduling of the enterprising industry affair of the ply-yarn drill at outgoing interface place data cell, can discarded part separate service data cell under the situation of bandwidth deficiency.For fear of the shake that the Service Data Unit scheduling causes, needing additionally is each business configuration sending time slots resource on the ply-yarn drill at outgoing interface place.Under the situation of rate variation, adjust the distribution of each professional sending time slots resource on the ply-yarn drill at interface place according to current interface rate and business demand, strict guarantee has been distributed the transmission of time interval resource business, and the Service Data Unit of unallocated time interval resource can be dropped under the situation that can't obtain time interval resource.The mode of configuration time interval resource is similar with the mode that disposes the switching network time interval resource before, no longer repeats here.
Embodiment two: Fig. 6, Fig. 7 and Fig. 8 have described a specific embodiment based on the MPLS/PWE3 packaged type.
As Fig. 7 and the described network scenarios of Fig. 8, node 701 and node 705 are fringe node, promptly professional up and down node, and the transmission of business datum between node 701 and node 705 can be passed through a plurality of intermediate nodes, i.e. node 702, node 703 and node 704.Here suppose between node 702 and the node 703, the link between node 703 and the node 704 is microwave link.Being delivered to node 705 with business datum from node 701 is example.After business datum is encapsulated as the Service Data Unit that carries label information at last service node, and exchange to outbound port by switching network according to label information, can be packaged into a big block multiple connection frame structure again at a plurality of Service Data Units of outbound port, the multiple connection frame that forms can periodically send on outgoing interface continuously; After intermediate node receives the multiple connection frame, therefrom parse a plurality of Service Data Units, and Service Data Unit is exchanged to outbound port according to the label information that carries in the Service Data Unit, can be packaged into a big multiple connection frame again at a plurality of Service Data Units of outbound port, the multiple connection frame that forms can periodically send on outgoing interface continuously; After following service node receives the multiple connection frame, therefrom parse a plurality of Service Data Units, and Service Data Unit exchanging to down service port according to the label information that carries in the Service Data Unit, the decapsulation Service Data Unit obtains original business datum on service port down.Service node, intermediate node and following service node be at the processing basically identical of ply-yarn drill and switching network part in this process, below above service node be that example is described particularly and encapsulated and the processing of switching network processing section.
When last service node 701 receives business, all carry out PWE3 (Pseudo-Wire Emulation Edge to Edge for grouping message or TDM frame (as E1), Pseudo Wire Emulation Edge-to-Edge, be called for short pseudo-line) the label encapsulation, and then carry out LSP (Label Switching Path, label switched path) label encapsulation obtains Service Data Unit.As shown in Figure 6, the LSP label is used to identify forward-path, realizes the forwarding of Service Data Unit, and the PWE3 label then can be used for the differentiation between the last different business that carries of same LSP.In addition, can utilize CoS (Class of Service, the type of service) territory in the PWE3 label to come the indicating services type, be that the jitter-sensitive business also is non-jitter-sensitive business with differentiated service.
In the node that need transmit Service Data Unit, be business configuration switching network time interval resource in advance.As shown in Figure 7, be example with node 703, on node 703, be business configuration time slot allocation table to be processed in advance, the time slot allocation table is integrated in transmits here, professional outbound port is shown in the Out tabulation in the table.For partial service, as delay variation sensitive kinds business such as CBR, TDM, voice, the time interval resource position in the exchange cycle of in switching network, fixing for its configuration.Here exchange cycle can be configured to the transmission cycle of multiple connection frame on the interface, for example sends the situation of 8000 block frames for per second, then exchange cycle is configured to the 1/8000=125 microsecond.Each exchange cycle is divided into continuous time slot of the same size unit, and for example each time slot cell size is set to every required time of transmission 1 byte data.As shown in Figure 7, for the LSP label be 100, pseudo line tag is 20 business, configuration time slot starting position is 800, take number of timeslots is 80, promptly disposing switching network time interval resource position is 800～879; For the LSP label be 100, pseudo line tag is 70 business, configuration time slot starting position is 300, take number of timeslots is 32, promptly the time slot resource location is 300～331; For the LSP label be 200, pseudo line tag is 80 business, configuration time slot starting position is 1000, take number of timeslots is 50, promptly the time slot resource location is 1000～1049; And for other business, as non-jitter-sensitive class business, for example the LSP label is 300 in the table 2, pseudo line tag is 15 business, need not to dispose the switching network time interval resource.This pre-configured switching network time interval resource can be finished by manual configuration, also can finish by automatic configuration.Auto configuration mode can automatically be realized the switching network resource distribution in node when node receives the Service Data Unit of a certain business first.Here be the operation that example illustrates automatic configuration with node 703: node receives Service Data Unit, extracts service label, type of service and data unit length information; If type of service is a jitter-sensitive class business, the list item of inquiry business label correspondence in the time slot allocation table then; If corresponding list item does not distribute the switching network resource information,, and be configured in the time slot allocation table then according to data unit length information distribution switching network resource information.In the present embodiment, service label can be the PWE3 label, also can be that LSP label and PWE3 tag combination are represented; Traffic type information then is carried at the CoS territory of PWE3 label; The length information of Service Data Unit then can obtain by the accounting message byte number, and for example node need extract single message so that follow-up forwarding and QoS handle, and can obtain message length information in this process.In general, the length of the Service Data Unit of same jitter-sensitive class business is fixed, but also have less change in some cases, this moment is excessive as if the length that receives Service Data Unit, required switching network time slot more then upgrades time slot allocation according to the length of the Service Data Unit that receives.In addition, also can be the traffic assignments time slot more time interval resource more required, realize tolerance for difference on the frequency XOR data unit length change between the node than Service Data Unit length.Be the E1 data cell of 32 bytes (not counting expense) for example, can dispose and transmit the required time interval resource of 33～35 bytes (not counting expense), reserve a small amount of time interval resource at time slot starting position and time slot end position and be used to realize tolerance for length.
Node is behind the Service Data Unit that obtains local encapsulation or upstream node transmission, and inquiry is transmitted and obtained outbound port information and gap information according to service label; Buffer memory is put in the section of Service Data Unit delays time and sends to corresponding outbound port behind the assigned timeslot.For the Service Data Unit of unallocated gap information, after inquiry is transmitted and obtained outbound port information, its Service Data Unit section is sent at the time slot that is not assigned with.For example, before sending, can judge current required time slot or time slot interval whether with distribute time slot collision, if, then buffer memory is put in the Service Data Unit section, delaying time sends with distributing the not afoul time slot of time slot again; If not, then can send immediately.
At the outbound port place, a plurality of Service Data Units are put into the multiple connection frame send.Here the multiple connection frame is in strict accordance with periodically sending, as per second 8000 frames.
If link rate changes, for example, the microwave link between node 703 and node 704 is owing to Changes in weather or other factors, and when causing link rate to change, node 703 carries out following operation:
S401 obtains the microwave link speed between present node 703 and the node 704;
S402 according to current microwave link speed, in conjunction with each professional bandwidth resources demand, calculates the time slot allocation strategy that makes new advances;
Particularly, node reports the time interval resource configuration module of node with the microwave link speed that obtains, the time interval resource configuration module according to the professional connection reliability on the present node require, service bandwidth demand and microwave link speed state recomputate distributing slot resources.Professional connection reliability requires to be embodied in usually the precedence field or the class of service cos field of Service Data Unit.
Particularly, cause to guarantee under the situation of all jitter-sensitive service features, when recomputating the switching network time slot, can cancel time slot allocation the low jitter-sensitive business of part reliability requirement in the bandwidth reduction; Can guarantee in the bandwidth increase under the situation of more jitter-sensitive service features, when recomputating, can be the enough time interval resources of the jitter-sensitive traffic assignments of unallocated time interval resource.
S403 according to the new time slot allocation policy update time slot allocation table that calculates, carries out Service Data Unit according to the time slot allocation table that upgrades and handles.
Particularly, node is handed down to an outpost of the tax office, ply-yarn drill and a switching network controller with new time slot allocation table, and the section of control Service Data Unit enters the time of switching network.
Particularly, Fig. 8 has described the time slot allocation table after upgrading under the situation that bandwidth reduces, and adjust the result and be: for the LSP label is 100, the PW label is 20 business, because the bandwidth resources deficiency, and its priority is lower, the switching network time slot of will not reallocating; For the LSP label is 100, and the PW label is 70 business, and the switching network time slot allocation is constant; For the LSP label be 200, the PW label is 80 business, the switching network time slot position of its distribution is changed to 200～249.After propping up the new time slot allocation information of an outpost of the tax office, ply-yarn drill and the acquisition of switching network controller, for the LSP label is 100, the PW label is 20 business, its required time interval resource of strict guarantee no longer, but be dropped or in the time slot of non-strict guarantee with other service competition time interval resource; For the LSP label be 200, the PW label is 80 business, is the 200th～249 section time slot with limiting its time interval resource position that enters switching network.
With a plurality of Service Data Units put into multiple connection frame and send at the outbound port place this moment.Here the multiple connection frame is still in strict accordance with periodically sending, as per second 8000 frames.Just this moment, the length of every frame diminished because speed reduces.
Another kind of processing method when link rate changes can be not change switching network time slot allocation strategy, but sending time slots allocation strategy on the ply-yarn drill at change outgoing interface place.This processing mode requires in the scheduling of the enterprising industry affair of the ply-yarn drill at outgoing interface place data cell, can discarded part separate service data cell under the situation of bandwidth deficiency.For fear of the shake that the Service Data Unit scheduling causes, needing additionally is each business configuration sending time slots resource on the ply-yarn drill at outgoing interface place.Under the situation of rate variation, adjust the distribution of each professional sending time slots resource on the ply-yarn drill at interface place according to current interface rate and business demand, strict guarantee has been distributed the transmission of time interval resource business, and the Service Data Unit of unallocated time interval resource can be dropped under the situation that can't obtain time interval resource.The mode of configuration time interval resource is similar with the mode that disposes the switching network time interval resource before, no longer repeats here.
Be example with GFP and PWE3 encapsulation format respectively below, the service data transmission method of the embodiment of the invention is described.In the above-described embodiments, node is jitter-sensitive class business configuration switching network time interval resource in advance, after obtaining Service Data Unit, for jitter-sensitive class business, according to pre-configured switching network time slot it is sent, thereby guarantees professional jitter performance.In addition, use the technical scheme of the embodiment of the invention, when the network transmission rate changed, node can be jitter-sensitive business configuration switching network time interval resource, thereby guarantee the correct transmission of jitter-sensitive business again according to the transmission rate result of variations.
Description by above method embodiment, the those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware, but the former is better execution mode under a lot of situation.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in the storage medium, comprise that some instructions are with so that a computer equipment (can be a personal computer, server, the perhaps network equipment etc.) carry out all or part of step of the described method of each embodiment of the present invention.And aforesaid storage medium comprises: various media that can be program code stored such as read-only memory (ROM), random-access memory (ram), magnetic disc or CD.
Corresponding to top method embodiment, the embodiment of the invention also provides a kind of business data transmission device, referring to shown in Figure 9, comprising:
Time interval resource configuration module 910 is used to obtain be the pre-configured switching network time interval resource information of business;
Business datum obtains module 920, is used to obtain Service Data Unit, carries service identification in the described Service Data Unit;
Time interval resource determination module 930 is used for according to described service identification and describedly is professional pre-configured switching network time interval resource information, determines the switching network time interval resource of described Service Data Unit;
The first business datum sending module 940 is used in time slot corresponding described Service Data Unit being sent to switching network according to determined switching network time interval resource.
Referring to shown in Figure 10, described time interval resource configuration module 910 can comprise:
Length obtains submodule 911, is used to obtain the length of the Service Data Unit of jitter-sensitive class business;
In addition, described time interval resource configuration module 910 can also comprise and judge submodule 913 and inquiry submodule 914, wherein:
Described configuration submodule 912, be used for when described inquiry submodule 914 does not inquire with the pairing switching network resource information of the service identification of the Service Data Unit of described acquisition, according to the length of described Service Data Unit is the fixing switching network time interval resource of described business configuration, is stored in the result of described configuration described in the professional pre-configured switching network time interval resource information.
Referring to shown in Figure 11, the business data transmission device that the embodiment of the invention provided can also comprise:
The second business datum sending module 950, described time interval resource determination module 930 is used for when can't be determined the switching network time interval resource of described Service Data Unit, with distribute the not afoul time slot of switching network time interval resource, described Service Data Unit is sent to switching network.
The above-mentioned business data transmission device that provides, be jitter-sensitive class business configuration switching network time interval resource in advance, after obtaining Service Data Unit, for jitter-sensitive class business, according to pre-configured switching network time slot it is sent, thereby guarantee professional jitter performance.
Referring to shown in Figure 12, the business data transmission device that the embodiment of the invention provided can also comprise:
Then described time interval resource configuration module 910 also is used for the result of variations according to service bandwidth demand and transmission rate, is business configuration switching network time interval resource again.
Wherein, described time interval resource configuration module 910 when transmission rate reduces and is the switching network time slot collision of business configuration again, only is the higher jitter-sensitive business configuration switching network time interval resource of priority.And when transmission rate improves, lower and do not dispose the jitter-sensitive business configuration switching network time interval resource of switching network time interval resource for priority again.
Use above-mentioned business data transmission device, when the network transmission rate changes, can be jitter-sensitive business configuration switching network time interval resource again, thereby guarantee the correct transmission of jitter-sensitive business according to the transmission rate result of variations.
Be understandable that, the business data transmission device that the embodiment of the invention provided, can also comprise the above-mentioned second business datum sending module 950 and speed monitoring module 960 simultaneously, as shown in figure 13, wherein, after time slot resource distribution module 910 is business configuration switching network time interval resource again, can cause service identification and the variation that sends net time interval resource corresponding relation, the second business datum sending module 950, described time interval resource determination module 930 is used for when can't be determined the switching network time interval resource of described Service Data Unit, described Service Data Unit is carried out slicing treatment, with distribute the not afoul time slot of switching network time interval resource, the section of described Service Data Unit is sent to switching network.Also promptly realize the transmission that do not distribute the Service Data Unit of time interval resource information to current.
For device embodiment, because it is substantially corresponding to method embodiment, so relevant part gets final product referring to the part explanation of method embodiment.Device described above or system embodiment only are schematic, wherein said module as the separating component explanation can or can not be physically to separate also, the parts that show as module can be or can not be physical modules also, promptly can be positioned at a place, perhaps also can be distributed on a plurality of network element.Can select wherein some or all of module to realize the purpose of present embodiment scheme according to the actual needs.Those of ordinary skills promptly can understand and implement under the situation of not paying creative work.
In several embodiment that the application provided, should be understood that, disclosed system, apparatus and method not surpassing in the application's the spirit and scope, can realize in other way.Current embodiment is a kind of exemplary example, should be as restriction, and given particular content should in no way limit the application's purpose.For example, the division of described module or submodule only is that a kind of logic function is divided, and during actual the realization other dividing mode can be arranged, and for example a plurality of modules or a plurality of submodule combine.In addition, a plurality of modules can or assembly can in conjunction with or can be integrated into another system, or some features can ignore, or do not carry out.
In addition, institute's descriptive system, the schematic diagram of apparatus and method and different embodiment, in the scope that does not exceed the application, can with other system, module, technology or method in conjunction with or integrated.Another point, the shown or coupling each other discussed or directly to be coupled or to communicate to connect can be by some interfaces, the indirect coupling of device or unit or communicate to connect can be electrically, machinery or other form.
The above only is the specific embodiment of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (15)
1. a service data transmission method is characterized in that, described method comprises:
Obtain to be professional pre-configured switching network time interval resource information;
Obtain Service Data Unit, carry service identification in the described Service Data Unit;
According to described service identification and described be professional pre-configured switching network time interval resource information, determine the switching network time interval resource of described Service Data Unit;
According to determined switching network time interval resource, described Service Data Unit is sent to switching network in time slot corresponding.
2. method according to claim 1 is characterized in that, described acquisition is professional pre-configured switching network time interval resource information, comprising:
Obtaining the length of the Service Data Unit of jitter-sensitive class business, is the fixing switching network time interval resource of described jitter-sensitive class business configuration according to described length, obtains to be the pre-configured switching network time interval resource information of business.
3. method according to claim 1 is characterized in that, after obtaining Service Data Unit, determines also to comprise before the switching network time interval resource of described Service Data Unit:
Judge that the Service Data Unit that obtains is a jitter-sensitive class Service Data Unit;
Whether inquiry exists the pairing switching network resource information of service identification with the Service Data Unit of described acquisition in for professional pre-configured switching network time interval resource information, if not, be the fixing switching network time interval resource of described business configuration further then, be stored in the result of described configuration described in the professional pre-configured switching network time interval resource information according to the length of described Service Data Unit.
4. method according to claim 1 is characterized in that, if according to described service identification and described be professional pre-configured switching network time interval resource information, can't determine the switching network time interval resource of described Service Data Unit, then described method also comprises:
With distribute the not afoul time slot of switching network time interval resource, described Service Data Unit is sent to switching network.
5. method according to claim 1 is characterized in that, also comprises:
When transmission rate changes, obtain the result of variations of transmission rate, according to the result of variations of service bandwidth demand and transmission rate, be business configuration switching network time interval resource again.
6. method according to claim 5 is characterized in that, described result of variations according to service bandwidth demand and transmission rate specifically comprises for business configuration switching network time interval resource again:
According to current transmission rate, in conjunction with each professional bandwidth resources demand, calculate the time slot allocation strategy, be business configuration switching network time interval resource according to described time slot allocation strategy.
7. method according to claim 5 is characterized in that, described result of variations according to service bandwidth demand and transmission rate is business configuration switching network time interval resource again, comprising:
When transmission rate reduces and is the switching network time slot collision of business configuration again, only be the higher jitter-sensitive business configuration switching network time interval resource of priority.
8. method according to claim 5 is characterized in that, described result of variations according to service bandwidth demand and transmission rate is business configuration switching network time interval resource again, comprising:
When transmission rate improves, lower and do not dispose the jitter-sensitive business configuration switching network time interval resource of switching network time interval resource for priority again.
9. a business data transmission device is characterized in that, comprising:
The time interval resource configuration module is used to obtain be the pre-configured switching network time interval resource information of business;
Business datum obtains module, is used to obtain Service Data Unit, carries service identification in the described Service Data Unit;
The time interval resource determination module is used for according to described service identification and describedly is professional pre-configured switching network time interval resource information, determines the switching network time interval resource of described Service Data Unit;
The first business datum sending module is used in time slot corresponding described Service Data Unit being sent to switching network according to determined switching network time interval resource.
10. device according to claim 9 is characterized in that, described time interval resource configuration module comprises:
Length obtains submodule, is used to obtain the length of the Service Data Unit of jitter-sensitive class business;
The configuration submodule, being used for according to described length is the fixing switching network time interval resource of described jitter-sensitive class business configuration, obtains to be the pre-configured switching network time interval resource information of business.
11. device according to claim 9 is characterized in that, described time interval resource configuration module also comprises:
Judge submodule, be used for after described business datum obtains module acquisition Service Data Unit, judging that the Service Data Unit that obtains is a jitter-sensitive class Service Data Unit;
The inquiry submodule is used for after described judgement submodule is finished judgement, and whether inquiry exists the pairing switching network resource information of service identification with the Service Data Unit of described acquisition in for professional pre-configured switching network time interval resource information;
Described configuration submodule, be used for when described inquiry submodule does not inquire with the pairing switching network resource information of the service identification of the Service Data Unit of described acquisition, according to the length of described Service Data Unit is the fixing switching network time interval resource of described business configuration, is stored in the result of described configuration described in the professional pre-configured switching network time interval resource information.
12. device according to claim 9 is characterized in that, this device also comprises:
The second business datum sending module, described time interval resource determination module is used for when can't be determined the switching network time interval resource of described Service Data Unit, with distribute the not afoul time slot of switching network time interval resource, described Service Data Unit is sent to switching network.
13. device according to claim 9 is characterized in that, this device also comprises:
The speed monitoring module is used for when transmission rate changes, and obtains the result of variations of transmission rate;
Described time interval resource configuration module also is used for the result of variations according to service bandwidth demand and transmission rate, is business configuration switching network time interval resource again.
14. device according to claim 13 is characterized in that,
Described time interval resource configuration module when transmission rate reduces and is the switching network time slot collision of business configuration again, only is the higher jitter-sensitive business configuration switching network time interval resource of priority.
15. device according to claim 13 is characterized in that,
Described time interval resource configuration module is when transmission rate improves, lower and do not dispose the jitter-sensitive business configuration switching network time interval resource of switching network time interval resource for priority again.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201010268779 CN101924702A (en) | 2010-08-26 | 2010-08-26 | Service data transmission method and device |
| PCT/CN2011/073634 WO2011140945A1 (en) | 2010-08-26 | 2011-05-04 | Service data transmission method and apparatus |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010268779 CN101924702A (en) | 2010-08-26 | 2010-08-26 | Service data transmission method and device |
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| CN101924702A true CN101924702A (en) | 2010-12-22 |
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| CN 201010268779 Pending CN101924702A (en) | 2010-08-26 | 2010-08-26 | Service data transmission method and device |
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| WO (1) | WO2011140945A1 (en) |
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