CN101754054A - Method, device and system for treating business transmission - Google Patents
Method, device and system for treating business transmission Download PDFInfo
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- CN101754054A CN101754054A CN200810227866A CN200810227866A CN101754054A CN 101754054 A CN101754054 A CN 101754054A CN 200810227866 A CN200810227866 A CN 200810227866A CN 200810227866 A CN200810227866 A CN 200810227866A CN 101754054 A CN101754054 A CN 101754054A
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Abstract
The embodiment of the invention provides a method, a device and a system for treating business transmission, belonging to the field of optical networks, wherein the method for treating business transmission comprises the following steps: a core node receiving source edge node builds a request message according to a link sent by a business request; the core node builds the request message according to the link to primarily distribute band-width resources and transmits the business with the distributed band-width resources; when the core node receiving source edge node sends the tracking reserved request message, the band-width resources are secondarily distributed according to the tracking reserved request message, and the business continues to be transmitted by using the distributed band-width resources. The embodiment of the invention also provides another method for treating business transmission. The embodiment of the invention further provides the device and the system for treating business transmission which correspond to the two methods for treating business transmission. And the methods, the device and the system for treating business transmission provided by the embodiment of the invention can improve the loading capacity of networks to periodical businesses.
Description
Technical field
The embodiment of the invention relates to communication technical field, particularly a kind of service transmission processing methods, device and system.
Background technology
From the nineties in 20th century, global communication construction and application development are rapid, and optical fiber cable progressively substitutes copper cabling in the past as communication media.Wherein according to time division multiplexing (Time DivisionMultiplexing, hereinafter to be referred as: (the Synchronous DigitalHierarchy of synchronous digital hierarchy TDM), hereinafter to be referred as: SDH), its digital rate has reached 10Gbps, and promptly light carrier is modulated and the digital rate that transmits has reached 10Gbps on optical fiber.Simultaneously along with wavelength division multiplexing (Wavelength Division Multiplexing, hereinafter to be referred as: WDM)/dense wave division multipurpose (Dense Wavelength Division Multiplexing, hereinafter to be referred as: the DWDM) utilization of technology, promptly monomode fiber can transmit tens the road or the light carrier on hundreds of road even thousands of roads simultaneously at wavelength 1550nm window, makes the transmission capacity of optical fiber be higher than the digital rate 10Gbps of TDM far away.So high transmission rate has substantially exceeded old-fashioned group technology and can reach processing speed, and the disposal ability of network processes equipment has become the bottleneck of optical-fiber network, therefore the new light switching technology of necessary research.
The light burst-switched (Optical Burst Switching, hereinafter to be referred as: be exactly a kind of light switching technology of arising at the historic moment new OBS), it is devoted to solve the node bottleneck problem in the communication network.It adopts the light burst, and (a plurality of bags are focused at together, its duration generally at tens μ s to hundreds of μ s, even may arrive several ms) unit in return, its granularity is between light path exchange (Optical CircuitSwitching, hereinafter to be referred as: wavelength OCS) and light packet switching (Optical PacketSwitching, hereinafter to be referred as: between light grouping OPS).
Use the proper amount times in the OBS technology at present (Just Enough Time, hereinafter to be referred as: JET) agreement is finished the reservation of bandwidth resources. moreIts operation principle is to send burst control packet header (Burst Header Packet by the source fringe node, hereinafter to be referred as: BHP), by this BHP is the bandwidth resources that bursty data wraps in one period set time of reservation in the core node, uses the bandwidth resources of reservation to carry out the business transmission then.
The inventor finds that in realizing process of the present invention there is following problem at least in the reserving method that prior art uses the JET agreement to carry out bandwidth resources:
This bandwidth resources appointment mode can only carry out effective bandwidth resources reservation to the burst packets of single regular length, and for the periodic traffic of some coarsegrains, for example: SONET/SDH, TDM business, its professional duration is longer, its professional bandwidth resources by one period set time usually can't end of transmission, that is: by sending the required bandwidth resources of periodic traffic that BHP can't preengage coarsegrain fully.Therefore, by the JET agreement effectively property performance period business carry out bandwidth resources reservations, low for the bearing capacity of periodic traffic.
Summary of the invention
The purpose of the embodiment of the invention is: a kind of service transmission processing methods, device and system are provided, and effectively property performance period service appointment bandwidth resources improve the bearing capacity to periodic traffic.
For achieving the above object, the embodiment of the invention provides a kind of service transmission processing methods, comprising:
The request for building link message that core node reception sources fringe node sends according to service request, described request for building link message is sent to the object edge node by described source fringe node through core node;
Core node is according to the first sub-distribution bandwidth resources of described request for building link message, and utilizes the bandwidth resources transport service of described sub-distribution just;
When core node receives request that the source fringe node sends when continuing to distribute the tracking reserve requests message of bandwidth resources, according to following the tracks of reserve requests message is described traffic assignments bandwidth resources once more, and utilizes the bandwidth resources of sub-distribution again to continue the described business of transmission; Follow the tracks of when reserve requests message detects the service request that also has described business by the Preset Time of source fringe node before the bandwidth resources of distributing use and send.
The embodiment of the invention also provides another kind of service transmission processing methods, comprising:
The request for building link message that core node reception sources fringe node sends according to service request;
Core node is according to the first sub-distribution bandwidth resources of described request for building link message, and utilizes the bandwidth resources of described sub-distribution just to transmit described business;
After the bandwidth resources of described sub-distribution are just finished using, core node repeats to be described traffic assignments bandwidth resources, and the bandwidth resources of utilizing described distribution carry out business transmission, up to receive the link tear down message that the source fringe node sends when detecting the service request that does not have described business.
The embodiment of the invention also provides a kind of professional transmission processing device, comprising:
First receiver module is used for the request for building link message that the reception sources fringe node sends according to service request; The tracking reserve requests message that the Preset Time of reception sources fringe node before the bandwidth resources of being distributed use sends when detecting the service request that also has described business;
First resource distribution module is used for according to described request for building link distribution of messages bandwidth resources, according to described tracking reserve requests distribution of messages bandwidth resources;
First data transmission module is used to the bandwidth resources transport service of utilizing first resource distribution module to distribute.
The embodiment of the invention also provides another kind of professional transmission processing device, comprising:
Second receiver module is used for the request for building link message that the reception sources fringe node sends according to service request;
The information resources distribution module, be used for according to the first sub-distribution bandwidth resources of described request for building link message, and after the bandwidth resources of described sub-distribution are just finished using, repeat to be described traffic assignments bandwidth resources, up to receive the link tear down message that the source fringe node sends when detecting the service request that does not have described business;
Second data transmission module is used to utilize the bandwidth resources of information resources module assigns to carry out the business transmission.
The embodiment of the invention also provides a kind of professional transmission process system, comprises the source fringe node, core node and the object edge node that are arranged in optical-fiber network, and described core node is used for:
The request for building link message that the reception sources fringe node sends according to service request, described request for building link message is sent to described object edge node by described source fringe node through described core node;
According to the first sub-distribution bandwidth resources of described request for building link message, and utilize the bandwidth resources of described sub-distribution just to transmit described business;
When the request that receives source fringe node transmission continues to distribute the tracking reserve requests message of bandwidth resources, distribute bandwidth resources once more according to described tracking reserve requests message, and utilize the bandwidth resources of sub-distribution again to continue the described business of transmission; Described tracking reserve requests message sends when detecting the service request that also has described business by the source Preset Time of fringe node before the bandwidth resources of being distributed use.
The embodiment of the invention also provides another kind of professional transmission process system, comprises the source fringe node, core node and the object edge node that are arranged in optical-fiber network, and described core node is used for:
The request for building link message that the reception sources fringe node sends according to service request, described request for building link message is sent to described object edge node by described source fringe node through described core node;
According to the first sub-distribution bandwidth resources of described request for building link message, and utilize the bandwidth resources of described sub-distribution just to transmit described business;
After the bandwidth resources of described sub-distribution are just finished using, repeat to be described traffic assignments bandwidth resources, and utilize the bandwidth money of described distribution to carry out the business transmission, up to receive the link tear down message that the source fringe node sends when detecting the service request that does not have described business.
The service transmission processing methods that the embodiment of the invention provides, device and system, all be when the bandwidth resources of distributing are finished using and do not transmitted whole data, to continue the reserved bandwidth resource by the mode of " following the tracks of and preengaging " resource to core node, " following the tracks of reservation " can realize by two kinds of schemes, the one, send the tracking reserve requests message that request continues to distribute bandwidth resources by the source fringe node, the 2nd, the mode of carrying out the bandwidth resources reservation by core node automatically, above-mentioned two kinds of schemes can both continue the reserved bandwidth resource for periodic traffic, raising realizes the support to periodic traffic to the bearing capacity of periodic traffic.
Description of drawings
Fig. 1 is the schematic flow sheet of service transmission processing methods first embodiment of the present invention;
Fig. 2 is a sliding window structural representation in the embodiment of the invention;
Fig. 3 is the schematic flow sheet of successful reserved bandwidth resource in the embodiment of the invention;
Fig. 4 is the schematic flow sheet when in the link resource contention taking place in the embodiment of the invention;
Fig. 5 is the schematic flow sheet during information dropout in the embodiment of the invention;
Fig. 6 is the schematic flow sheet of service transmission processing methods second embodiment of the present invention;
Fig. 7 is the structural representation of source fringe node in the embodiment of the invention;
Fig. 8 is the structural representation of professional transmission processing device first embodiment of the present invention;
Fig. 9 is the structural representation of professional transmission processing device second embodiment of the present invention;
Figure 10 is the structural representation of the professional transmission process system embodiment of the present invention.
Embodiment
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
In existing OBS network, can not realize support to long-term periodic traffic, with regard to the JET agreement, need expand this agreement and signaling thereof, make it can support periodic resource reservation request, could support periodic traffic.For the resource reservation of property performance period, use " following the tracks of reservation " mechanism in the present embodiment, neither take whole wavelength channel for a long time, channel resource was not released before receiving the service ending signal.Fig. 1 as shown in Figure 1, comprises the steps: for the schematic flow sheet of service transmission processing methods first embodiment of the present invention
The request for building link message that step 101, core node reception sources fringe node send according to service request.
In this step, this request for building link message is that core node sent when detection has service request in the first time;
Usually in the process of bandwidth resources reservation, the resource reservation situation of every optical channel is represented with a resource chained list.In every resource chained list, can be recorded in the transmission time started and the transmission concluding time of each burst packets Frame of this channel transmission with node.When new burst packets arrives, Resource Scheduler will be searched for and meet the time slot that the burst packets Frame sends, the transmission time started of the burst packets that this is newly arrived and transmission concluding time are formed node then, are inserted in the resource chained list of this optical channel, to finish resource reservation.Simultaneously, every resource chained list needs again oneself to finish renewal, promptly when optical channel when sending the Frame of certain burst packets, and in the resource chained list, be with corresponding node deletion.
Such resource chained list can effectively carry out resource reservation to the burst packets of single regular length, but for " time slot " reserve requests of a large amount of periodic traffic, then can't be effectively satisfied.Supposing has N node in the resource chained list, longer when the duration of periodic traffic, when the number of time slots that is contained surpasses N, then can't once preengage whole resource request.
Distributing bandwidth resources in this step specifically can be the first sliding window of dividing on the resource chained list, the setting of sliding window size should be considered the influence of the node number factor in the resource chain table, usually because the node number in the resource chained list is limited, once the number of time slots that can preengage at most also should be limited, and also need consider the access capability of channel to periodic traffic.For example, have 32 nodes in the resource chained list of sign channel width resource, just can hold 32 " burst packets " or " time slot " simultaneously at most, simultaneously our regulation OBS channel is no more than 50% (access capability herein can be provided with by operator) to the access capability of periodic traffic, then for the SDH business of 8000 frame/seconds, the big I of sliding window is made as 4ms (125us*32*50%).The setting of sliding window size also should be satisfied following conditions: at first, the setting of sliding window size should be too not little, and the not so frequent reservation signaling that sends can cause signaling consumption excessive, and bandwidth is wasted; Secondly, it is too big that sliding window also should not be provided with, because if be provided with excessive, and the professional duration is not the integral multiple of sliding window size, then the bandwidth resources in last sliding window might be wasted in a large number; At last, the size of sliding window should be set to the integral multiple in business time-slot cycle, transmits to prevent that same time slot is divided in the different sliding windows.
The request that step 103, core node reception sources fringe node send continues to distribute the tracking reserve requests message of bandwidth resources, and above-mentioned tracking reserve requests message is sent when Preset Time detects the service request that also has described business by the source fringe node.
For long-term periodic business, adopt the mode of following the tracks of reservation to carry out the bandwidth resources reservation in the present embodiment.Set the duration thresholding of one-period business in the embodiment of the invention, described duration thresholding can equal first sliding window size of dividing.For the periodic traffic that surpasses thresholding, adopt the mode of " following the tracks of reservation " that periodic traffic is preengage.Promptly after receiving request for building link message, core node on the resource chained list, divides sliding window, the size of sliding window equals above-mentioned duration thresholding, then in sliding window according to service period, the business time-slot length allocation bandwidth resources of periodic traffic, specifically be with the size of business time-slot length as each time slot in the sliding window, the cycle that each time slot distributes on the Resources list in the sliding window equals service period, and information such as above-mentioned service period, business time-slot length are included in the request for building link message.The source fringe node also can constantly detect the service request that whether also has current business at the Preset Time before each bandwidth resources of distributing use simultaneously, if still detect the service request of current business, then follow the tracks of reservation, promptly the sliding window of once dividing does not have to have transmitted whole business, then send successively and follow the tracks of reserve requests message, stop to send tracking reserve requests message up to the service request that detects less than current business by the source fringe node.Core node when receiving tracking reserve requests message at every turn, divide the sliding window of identical size once more, and in the sliding window of dividing once more, distribute bandwidth resources, the bandwidth resources of subsequent allocations have identical service period, business time-slot length with the bandwidth resources of sub-distribution just.Just can be divided into a lot of sliding windows to lasting one section chronic periodic traffic by above-mentioned, each sliding window all regards as by " burst packets " of sizes such as a lot of and formed, and all sliding windows add and constituted complete periodic traffic together.In addition, because the bandwidth resources that tracking reserve requests message is asked are identical with last reservation, so for the content of following the tracks of reserve requests message, only need comprise basic resource description information, for example send the service identification of the business of service request, perhaps to indicate it be that the tracking reserve requests message that is under the jurisdiction of certain request for building link message gets final product by numbering, when following the tracks of reservation, utilize service identification or numbering to search information such as the service period of the business of last reservation, business time-slot length, carry out the reservation again of bandwidth resources according to above-mentioned information.Fig. 2 is a sliding window structural representation in the embodiment of the invention, as shown in Figure 2, sliding window on time shaft T (n+1) and sliding window (n), sliding window (n) comprises time slot (t), time slot (t+1), time slot (t+2), and sliding window (n+1) comprises time slot (t+3), time slot (t+4), time slot (t+5).
In the above-described embodiment, preferably, the object edge node can be set set up response message via core node to source fringe node return link receiving request for building link message, the object edge node also can be set after receiving tracking reserve requests message, preengage response message to source fringe node returning tracking via core node, the source fringe node sends professional after receiving above-mentioned response message again, mode with respect to traditional unidirectional resource reservation, this two-way resource reservation mode can solve link establishment request message data-bag lost in the bandwidth resources reservation process, cause the core node bandwidth resources to reserve the problem that failure brings, can reduce the packet loss in the packet transport process.Send the mode of following the tracks of reserve requests message booking bandwidth resources for this use source fringe node, can use the mode of " estimation is removed " to discharge bandwidth resources, promptly after receiving tracking reserve requests message, core node do not remove link automatically, also can send the link tear down message when detecting the service request that does not have current business by the source fringe node, the core node in the notice link discharges bandwidth resources.
Fig. 3 is the flow process flow diagram of successful reserved bandwidth resource in the embodiment of the invention, as shown in Figure 3, comprises the steps:
Step 204, source fringe node send and follow the tracks of reserve requests message when detecting the service request that also has current transport service.Be for long-term periodic traffic in the present embodiment, adopt the pattern of following the tracks of reservation to carry out the bandwidth resources reservation.Promptly can set a thresholding timer at the source fringe node, when periodic traffic begins to transmit, the timer timing of starting from scratch; After the professional transmission success in sliding window, the timer zero clearing also picks up counting.That is to say that the maximum of the each timing of this timer is no more than the duration thresholding of periodic traffic (sliding window size) (T
Th).(approaching degree is variable, can be made as " T during thresholding near the duration whenever timer
Th-T
Offset"), whether the source fringe node can automatic detection also have the service request of current periodic traffic to exist; If still exist, then send and follow the tracks of reserve requests message by the source fringe node, go the downstream core node " to follow the tracks of and preengage " bandwidth resources.After the downstream core node is received this tracking reserve requests message, automatically follow the tracks of " the caudal knot point " of periodic traffic in current sliding window of reserve requests message correspondence in the resource chained list of detection oneself, and the service period and the time slot size of pressing this periodic traffic continue the next sliding window of reservation, to be connected the business of a last sliding window, time slot in former and later two windows is arranged the requirement that satisfy service period, be that last time slot (caudal knot point) of previous sliding window and first time slots of a back sliding window should equal a service period at interval, to guarantee business continuance, when periodic traffic terminated, the source fringe node can detect the disappearance of service request.The mode that can adopt estimation to remove this moment, promptly the source fringe node no longer sends the tracking reserve requests message of next sliding window, and then channel resource can discharge after current sliding window transmission is finished automatically; Also can adopt to show the mode of removing, send the link tear down message by the source fringe node, the core node that receives this link tear down message discharges channel resource.
In professional transmission course, run into the situation of resource contention sometimes, be that the bandwidth resources that core node distributes the request for building link message request have been assigned to other business, can seize principle according to the bandwidth resources that set in advance and redistribute bandwidth resources, above-mentioned bandwidth resources are seized principle: at first confirm the type of service of bandwidth-hogging resource, be periodic traffic or aperiodicity business; Concrete is the bandwidth resources that periodic traffic is seized the aperiodicity business; And for two periodic traffic, by the bandwidth resources of the low periodic traffic of the high periodic traffic preempting priority of priority.Above-mentioned setting is because the demand of the bandwidth resources of periodic traffic is bigger, desired service quality equivalent is higher than the aperiodicity business (for example IP operation) of the general type of doing one's best, therefore the priority of setting cycle business is higher than the priority of aperiodicity business, promptly when periodic traffic and the professional transmission of aperiodicity resource contention, allow periodic traffic seize the resource of aperiodicity business.Fig. 4 is the schematic flow sheet when in the link resource contention taking place in the embodiment of the invention, as shown in Figure 4, comprises the steps:
Be when in core node, resource contention taking place in this enforcement, by judging professional type, if when being all periodic traffic, determine the distribution of bandwidth resources according to each professional service priority, give the high business of priority with bandwidth resource allocation, and for the low business of priority, then because can not successful reserved bandwidth resource, so core node sends the warning information that link establishment is failed to the source fringe node, the notification source fringe node sends the request for building link message request and sets up link in maximum traffic is waited for thresholding.This embodiment can guarantee the successful foundation of link, reduces the packet loss of transfer of data.
In the process of business transmission, because during network node (mainly being core node) job insecurity, the network failure that information dropout may occur, the source fringe node of causing can't be received the link establishment response message of object edge node, this can have two kinds of situations to cause, and the one, request for building link message is lost on certain core node ground; At this moment, the 2nd, the link establishment response message is lost at certain core node, the source fringe node can't be known the reservation situation of (comprising core point and object edge node) of each node in the link like this, therefore service request just may can not get response for a long time, in the present embodiment by setting up response threshold to solve this problem.Fig. 5 is the schematic flow sheet during information dropout in the embodiment of the invention, as shown in Figure 5, comprises the steps:
Certain node generation information dropout in step 402, the core node, promptly the request for building link information drop-out causes request for building link message to send the fall short fringe node, therefore can not set up response message by return link.In embodiments of the present invention, also may can not set up response message by return link because of object edge node generation information drop-out;
This step is that the source fringe node all uses timer to carry out timing after each transmission request for building link message, if in default response threshold, do not receive the link establishment response message, then can send request for building link message once more, stop to send after maximum traffic is waited for thresholding up to receiving the link establishment response message or arriving;
Maximum traffic in the present embodiment waits for that thresholding is the maximum transmitted time delay that periodic traffic can be born, and default response threshold can be with reference to the setting of bigoted time.Present embodiment is by being provided with response threshold, when not obtaining the link establishment response message, send request for building link message again, successfully set up the business that sends again up to the affirmation link, can guarantee the success rate of link establishment, reduce the packet loss in the data transmission procedure.
The foregoing description is to send the mode of following the tracks of reserve requests message by the source fringe node to realize the tracking of core node bandwidth resources is preengage, equally also can be by the mode of core node according to automatic reserved bandwidth resource of certain cycle, Fig. 6 is the schematic flow sheet of service transmission processing methods second embodiment of the present invention, as shown in Figure 6, comprise the steps:
The request for building link message that step 501, core node reception sources fringe node send according to service request, this step is that the source fringe node is when receiving service request, destination address (object edge address of node) according to service request calculates a paths, and sends request for building link message along this path;
Core node in this step repeats to be specifically as follows for described traffic assignments bandwidth resources: after each bandwidth resources of distributing are finished using, be described traffic assignments bandwidth resources once more, and after finishing using for the bandwidth resources of described traffic assignments once more, continue as described traffic assignments bandwidth resources.This repeats process for described traffic assignments bandwidth resources and lasts till always receive the link tear down message that the source fringe node sends when detecting the service request that does not have described business.
Core node can be to repeat to be described traffic assignments bandwidth resources with preset period when distributing bandwidth resources in the present embodiment.Present embodiment is after core node distributes bandwidth resources according to request for building link message for professional transmission, core node is according to the automatic reserved bandwidth resource of cycle that sets in advance, the concrete appointment mode of bandwidth resources is with identical during first implements, also be to divide sliding window earlier, in sliding window, distribute bandwidth resources again, the size in cycle is according to the number of node in the core node resource chained list and the OBS network access capability synthetic setting to periodic traffic, the same with the establishing method of the duration thresholding of the periodic traffic of being mentioned in the foregoing description, usually can be set to equal the duration thresholding, also equal the size of sliding window.
In the present embodiment, the object edge node also can send the link establishment response message after receiving request for building link message in addition, and the source fringe node sends professional after receiving this response message again, can reduce the packet loss of professional transmission like this.
In the present embodiment, core node is to obtain bandwidth resources by the mode of automatic reservation, can use the form that shows that link is removed, concrete is by the source fringe node when judgement does not have the service request of current business, and the core node in link sends the link tear down message; Core node is removed link according to receiving the link tear down message, discharges bandwidth resources.If the link tear down message is lost in transmission course, perhaps certain node dismounting link is unsuccessful, then might cause a part of node under the situation that does not have business, still to continue to follow the tracks of reservation according to some cycles, thereby cause long-time a large amount of wastes of resource, and follow-up business is caused obstruction.Generation for fear of this situation, also want in the present embodiment to use the dismounting response message, promptly when link tear down message arrival object edge node, and when successfully dischargeing the resource of each core node, send the dismounting response message by the object edge node to the source fringe node, the resource in the notification source fringe node link all successfully discharges.
In the above-described embodiment, repeat the mode that bandwidth resources are preengage by sending tracking reserve requests message and core node according to the cycle of setting, it is professional to be able to effectively transmission periodicity, and can reduce packet loss, the assurance transmission quality.With respect to existing JET agreement, technical scheme need be improved JET protocol signaling form in implementation process in the present embodiment, increases some and adapts to the periodic traffic information transmitted, and following is the example explanation with TDM class business.
With respect to the burst control packet header (BHP) in the JET agreement, link establishment signaling in the invention process, be the request for building link message that above embodiment mentions, comprise routing iinformation, business information and label exchange message three category informations, wherein routing iinformation comprises source address, destination address etc., business information comprises service quality (QoS) grade, service identification, business time-slot length and service period, business identity sign wherein is current TDM traffic ID, business time-slot length is represented the slot length of TDM business, and business time-slot length is similar to original burst packets length information; Service period is the periodical information of current business, and its value can be 125us, and promptly transmission rate was 8000 frame/seconds, can mate with the frame rate of SDH business; The professional duration is the duration length that current business is estimated, can be provided by the user, or be estimated by webmaster.Slot length in the present embodiment (Time Slot, hereinafter to be referred as: TS) by channel speed and service parameter decision.For example, for OC-24 channel (being equivalent to STM-8), if pass per second 25 frames, the HDTV signal of every frame 10Mb information needs TS=31.25us.Simultaneously, in order to ensure the access capability of OBS network to non-real-time service, intend regulation the access capability of TDM business is no more than 50% (this parameter can be set by operator) of the network bandwidth, so, can insert the TDM business of 622.08Mbit/s at most for the OC-24 channel.
Can also set up in the present embodiment in addition and follow the tracks of reservation signaling, the tracking reserve requests message of promptly mentioning in the foregoing description.Because what follow the tracks of reservation is the follow-up resource of current TDM business, therefore should follow the tracks of the needed TDM information of reservation signaling, all identical as service period, business time-slot size etc. with current business, can no longer carry this type of information, be which professional getting final product and only need identify current TDM class business.When core node is received this signaling, use its entrained TDM traffic ID information and current traffic ID and compare,, then follow the tracks of reservation automatically if identical; If different, then abandon this signaling and do not process, and send an alarm signaling to source node, after can continuing for some time, current resource discharges automatically.
Affirmation signaling in the embodiment of the invention, it is the above-mentioned link establishment response message of mentioning, be after the bandwidth resources of successfully preengaging on all core nodes, by the reservation success confirmation that the object edge node sends to the source fringe node, successfully set up to show the sub-wavelength passage on the optical fiber link.Because it is a feedback information, thus form can be provided with fairly simple.Only need to comprise source address, label information and TDM traffic ID, source address wherein and label information are used for the source fringe node that definite this signaling will be returned, and the TDM traffic ID is the request for building link message of which business in order to what indicate this information-reply affirmation.
Alarm signaling in the embodiment of the invention, promptly above-mentioned alarm information need show just that also this alarm signaling is to get final product at the alarm of which business and the source fringe node that will send, and therefore only need carry TDM traffic ID and source address.The triggering of alarm signaling has three kinds of conditions, and a kind of is the link establishment signaling when the downstream core node runs into resource contention and produces the reservation failure, triggers and be sent to the source fringe node by the core node that clashes; Another kind of condition is to produce error code when following the tracks of the reservation signaling, when causing the downstream core node can't follow the tracks of reservation, triggers and be sent to the source fringe node by the core node of receiving wrong signaling; The third is to lose when certain secondary tracking reservation signaling, the downstream core node is estimated the resource that has discharged such TDM business automatically, and the tracking of this business afterwards reservation signaling has normally received, if receive the tracking reservation signaling of certain class TDM business this moment continuously, then need to send the alarm signaling to the source fringe node, so that the source fringe node can send the link establishment signaling again, preengage the resource of such TDM business again.
In addition at the situation of method second embodiment of the professional transmission of the present invention, when flange node judges current business transmission in source is finished, send link and remove signaling, it is the link tear down message of mentioning in the foregoing description, the object edge node also will send link and remove the affirmation signaling after receiving this signaling, be that the link of mentioning in the foregoing description is removed response message, be example still with TDM class business herein, these two kinds of signalings, owing to do not need to carry the parameter of TDM class business, only carrying routing iinformation and TDM class traffic ID information, is the professional sub-wavelength passage of which bar TDM with what tell that the downstream core node will remove.
Fig. 7 is the structural representation of source fringe node in the embodiment of the invention, this structural representation is implemented corresponding to service transmission processing methods first of the present invention, as shown in Figure 7, the source fringe node comprises: first sending module 11, first data processing module 12 and second sending module 13, wherein first sending module 11 is used for sending request for building link message according to service request, core node bandwidth resource in the notice link, through after the bigoted time, just can use the bandwidth resources of reservation to carry out the business transmission, first data processing module 12 receives service request, according to default rule business is handled to obtain meeting the data format of network requirement, in fact this operation comprises two kinds of situations, the one, with periodic traffic (TDM, SONET/SDH class business) business converts the business of OBS Network Transmission to, and the 2nd, convert the business of OBS Network Transmission to periodic traffic.Concrete: if the source fringe node inserts per second 25 frames, the HDTV business of every frame 10Mb information (on the OC-192 channel corresponding to 1ms time slot size), then fringe node will be disassembled into per second 8000 frames, the size of the information of every frame 31.25KB to this traffic frame.That is to say that fringe node will calculate the still burst dismounting of assembling that need happen suddenly according to the TDM parameter of current access service and the TDM parameter (cycle) of OBS network settings, and then moves corresponding algorithm.Same, just have opposite operation for the object edge node.
Second sending module 13 is used for being about to send when Preset Time before transmission will be finished detects the service request that also has described business tracking reserve requests message in each bandwidth resources of distributing.
Source fringe node in the present embodiment when business utilizes the bandwidth resources of reservation last time not have transmission not finish, sends tracking reserve requests message and continues the reserved bandwidth resource, can realize the support to periodic traffic.
The source fringe node can also comprise the 3rd sending module, is used for when not having the service request of described business sending the link tear down message to the core node of link.
Fig. 8 is the structural representation of professional transmission processing device first embodiment of the present invention, as shown in Figure 8, comprise: first receiver module 21, first resource distribution module 22 and first data transmission module 23, wherein first receiver module 21 is used for the request for building link message that the reception sources fringe node sends according to service request; The reception sources fringe node is about to the tracking reserve requests message that sends when Preset Time before transmission will be finished detects the service request that also has described business in each bandwidth resources of distributing, and all comprises the service identification that is used for identification service in described request for building link message and the tracking reserve requests message; First resource distribution module 22 is used for according to described request for building link distribution of messages bandwidth resources, according to following the tracks of reserve requests distribution of messages bandwidth resources; First data transmission module 23 is used to utilize the bandwidth resources transport service of first resource distribution module, 22 distribution.Professional transmission processing device in the present embodiment is equivalent to the core node in the OBS network, and core node can utilize this bandwidth resources transport service then for the business transmission distributes bandwidth resources after receiving request for building link message or following the tracks of reserve requests message.
On the basis of the foregoing description, can also comprise second resource distribution module and warning information sending module, second resource distribution module wherein, be used for when the bandwidth resources that described request for building link message request is distributed have been assigned to other business, seize principle according to the bandwidth resources that set in advance and redistributing bandwidth resources; The warning information sending module is used for sending the alarm information of setting up link failure to the source fringe node if described business is unallocated to bandwidth resources when redistributing bandwidth resources.The situation of resource contention to taking place in this main pointer in core node, be that the bandwidth resources of request for building link message expectation reservation are during by other service appointments, may preengage unsuccessful, under the unsuccessful situation of current business reserved bandwidth resource, core node can send a warning message, and the notification source fringe node sends information reserved bandwidth resource again after waiting for a period of time.This mode can improve the reliability of Network Transmission, reduces the packet loss in the transmission course, and bandwidth resources are wherein seized principle specifically can be with reference to aforesaid embodiment.
Comprise corresponding to the source fringe node among service transmission processing methods second embodiment of the present invention: the 4th sending module, second data processing module and the 5th sending module, wherein the 4th sending module is used for the request for building link message according to the service request transmission; Second data processing module is used to receive service request, and according to default rule business is handled to obtain meeting the data format of network requirement; The 5th sending module is used for when detecting the service request that does not have described business, and the core node in link sends the link tear down message.Present embodiment is to be the situation of carrying out the reservation of bandwidth resources according to certain cycle automatically at core node, send link tear down message notice core node by the source fringe node and discharge bandwidth resources, can prevent effectively that core node is undying carries out bandwidth resources reservations, causes the waste of bandwidth resources.
Corresponding with above-mentioned source fringe node, the invention process also provides a kind of embodiment of core node.Fig. 9 is the structural representation of professional transmission processing device second embodiment of the present invention, as shown in Figure 9, comprise: second receiver module 31, information resources distribution module 32, second data transmission module 33, wherein second receiver module 31 is used for the request for building link message that the reception sources fringe node sends according to service request; Information resources distribution module 32 is used for according to the first sub-distribution bandwidth resources of above-mentioned request for building link message, and after the bandwidth resources of described sub-distribution are just finished using, repeat to be described traffic assignments bandwidth resources, up to receive the link tear down message that the source fringe node sends when detecting the service request that does not have described business, during duplicate allocation band piece resource, can predetermined period, with preset period duplicate allocation bandwidth resources; The bandwidth resources that second data transmission module 33 is used to utilize information resources distribution module 32 to distribute are carried out the business transmission;
Professional transmission processing device in the present embodiment is corresponding to the core node among service transmission processing methods second embodiment, this core node can repeat the distribution of bandwidth resources according to preset period, carry out the business transmission, realized support periodic traffic.
Figure 10 is the structural representation of the professional transmission process system embodiment of the present invention, as shown in figure 10, this system comprises source fringe node 1, core node 2 and the object edge node 3 that is arranged in optical-fiber network, in specific embodiment, generally includes a plurality of core nodes 2.Core node 2 is used for the request for building link message that reception sources fringe node 1 sends according to service request, and described request for building link message is sent to described object edge node 3 by described source fringe node 1 through described core node 2; According to the first sub-distribution bandwidth resources of described request for building link message, and utilize the bandwidth resources of described sub-distribution just to transmit described business; When the request that receives 1 transmission of source fringe node continues to distribute the tracking reserve requests message of bandwidth resources, distribute bandwidth resources once more according to described tracking reserve requests message, and utilize the bandwidth resources of sub-distribution again to continue the described business of transmission; Described tracking reserve requests message sends when detecting the service request that also has described business by the Preset Time of source fringe node 1 before the bandwidth resources of being distributed use.
Send the bandwidth resources of request for building link message booking core node in the present embodiment by the source fringe node, carry out the business transmission, when the source flange node judges also has the service request of current business, continue to send the bandwidth resources of following the tracks of reserve requests message booking core node, follow the tracks of reserve requests message reserved bandwidth resource constantly by sending, satisfy the transmission requirement of periodic traffic, realize support periodic traffic.
Above-mentioned in addition object edge node can also send the link establishment response message after receiving described request for building link message after, after receiving tracking reserve requests message, send the tracking of tracking reservation response message and preengage response message.The source fringe node sending business, can improve reliability of service transmission after receiving this response message, reduce packet loss.
The mode that can adopt estimation to remove in the present embodiment discharges bandwidth resources, and promptly core node discharges bandwidth resources automatically when not receiving tracking reservation signaling.Also can adopt to show the mode of removing, promptly on the fringe node of source, sending module is set, be used for when detection module does not detect the service request of current business, send the link tear down message.
At the method for mentioning among above-mentioned service transmission processing methods second embodiment, the embodiment of the invention also provides another kind of professional transmission process system, comprises the source fringe node, core node and the object edge node that are arranged in optical-fiber network.
Above-mentioned core node is used for the request for building link message that the reception sources fringe node sends according to service request, and described request for building link message is sent to described object edge node by described source fringe node through described core node; According to the first sub-distribution bandwidth resources of described request for building link message, and utilize the bandwidth resources of described sub-distribution just to transmit described business; After the bandwidth resources of described sub-distribution are just finished using, repeat to be described traffic assignments bandwidth resources, and utilize the bandwidth money of described distribution to carry out the business transmission, core node in receiving the link tear down message present embodiment that sends when the source fringe node is detecting the service request that does not have described business can be according to automatic reserved bandwidth resource of certain cycle, to realize the support to periodic traffic.
Above-mentioned in addition object edge node is used for sending the link establishment response message when receiving described request for building link message.
Core node in the present embodiment is the reserved bandwidth resource automatically, and to realize the support to periodic traffic, the object edge node sends the link establishment response message can reduce packet loss, improves reliability of data transmission in the link.And the source fringe node sends the link tear down message when not detecting the service request of current business, and the core node that receives this information confirms not need to continue the reserved bandwidth resource, thereby discharges bandwidth resources.
The service transmission processing methods that the invention process provides, device and system, all be mode continuation distribution bandwidth resources when the bandwidth resources of distributing are finished using and transmitted whole data by " tracking reservation ", " following the tracks of reservation " realizes by two kinds of schemes, the one, send the tracking reservation message that request continues to distribute bandwidth resources by the source fringe node, the 2nd, carry out the bandwidth resources reservation automatically by core node, can both satisfy the requirement of periodic traffic to bandwidth resources, improve the bearing capacity of network to periodic traffic, the object edge node is replied response message when receiving request for building link message or following the tracks of reserve requests message simultaneously, link establishment success of notification source fringe node or bandwidth resources reservation are finished, this moment, the edge, source sent data, can improve and effectively prevent data-bag lost, the raising network service quality.
It should be noted that at last: above embodiment is only in order to technical scheme of the present invention to be described but not limit it, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that: it still can make amendment or be equal to replacement technical scheme of the present invention, and these modifications or be equal to replacement and also can not make amended technical scheme break away from the spirit and scope of technical solution of the present invention.
Claims (18)
1. a service transmission processing methods is characterized in that, comprising:
The request for building link message that core node reception sources fringe node sends according to service request, described request for building link message is sent to the object edge node by described source fringe node through core node;
Core node is according to the first sub-distribution bandwidth resources of described request for building link message, and utilizes the bandwidth resources transport service of described sub-distribution just;
When core node receives request that the source fringe node sends when continuing to distribute the tracking reserve requests message of bandwidth resources, according to described tracking reserve requests message is described traffic assignments bandwidth resources once more, and utilizes the bandwidth resources of described sub-distribution again to continue the described business of transmission; Described tracking reserve requests message sends when detecting the service request that also has described business by the Preset Time of source fringe node before the bandwidth resources of distributing use.
2. service transmission processing methods according to claim 1 is characterized in that, described core node comprises according to the first sub-distribution bandwidth resources of described request for building link message:
Core node is according to described request for building link message first sliding window of dividing on the resource chained list, and sub-distribution bandwidth resources at the beginning of in the sliding window of described first division, the size of the sliding window of described first division is determined the access capability of described business according to node number and channel on the resource chained list.
3. service transmission processing methods according to claim 2, it is characterized in that, describedly receive request that the source fringe node sends when continuing to distribute the tracking reserve requests message of bandwidth resources when core node, comprise for described traffic assignments bandwidth resources once more according to following the tracks of reserve requests message:
Core node when receiving tracking reserve requests message at every turn, divide sliding window once more with the first identical size of sliding window of dividing, and in the sliding window of dividing once more, distribute bandwidth resources, these bandwidth resources have identical service period, business time-slot length with the bandwidth resources of sub-distribution just.
4. service transmission processing methods according to claim 1 is characterized in that, described core node is according to the first sub-distribution bandwidth resources of request for building link message, and utilizes the bandwidth resources of described sub-distribution just to transmit described business to comprise:
Core node is according to described request for building link message just after the sub-distribution bandwidth resources, the business of utilizing the bandwidth resources transmission sources fringe node of described sub-distribution just to send; Perhaps,
Core node is according to described request for building link message just after the sub-distribution bandwidth resources, utilize the bandwidth resources transmission sources fringe node of described sub-distribution just receiving the business that sends behind the link establishment response message, described link establishment response message is sent after receiving described request for building link message by described object edge node, returns to described source fringe node via core node.
5. service transmission processing methods according to claim 1 is characterized in that, described is described traffic assignments bandwidth resources according to following the tracks of reserve requests message once more, and utilizes the described business of bandwidth continuation transmission of described sub-distribution again to comprise:
After the traffic assignments bandwidth resources that send for the source fringe node once more according to described tracking reserve requests message, utilize the bandwidth resources of sub-distribution again to continue the business that the transmission sources fringe node sends; Perhaps,
After the traffic assignments bandwidth resources that send for the source fringe node once more according to described tracking reserve requests message, utilize the bandwidth resources of sub-distribution again to continue the transmission sources fringe node and receiving the business that sends behind the reservation response message of following the tracks of; Described tracking reservation response message is sent after receiving described tracking reserve requests message by described object edge node, returns to described source fringe node through core node.
6. according to each described service transmission processing methods of claim 1-5, it is characterized in that described core node just comprises after the sub-distribution bandwidth resources according to request for building link message:
When the bandwidth resources that core node distributes in described request for building link message request have been assigned to other business, seize principle according to the bandwidth resources that set in advance and redistribute bandwidth resources.
7. service transmission processing methods according to claim 6 is characterized in that, the bandwidth resources that described basis sets in advance are seized and comprised after principle is redistributed bandwidth resources:
If described business is unallocated to bandwidth resources when redistributing bandwidth resources, then send the alarm information of setting up link failure to described source fringe node.
8. service transmission processing methods according to claim 7 is characterized in that, also comprises:
Core node receives the request for building link message that described source fringe node sends at interval according to Preset Time, and the described request for building link message that sends at interval according to Preset Time is sent after receiving alarm information by the source fringe node and stops to send after receiving the link establishment response message or arriving maximum traffic wait thresholding.
9. service transmission processing methods according to claim 6 is characterized in that, described bandwidth resources are seized principle and comprised:
Periodic traffic is seized the bandwidth resources of aperiodicity business;
For two periodic traffic, the bandwidth resources of the periodic traffic that the periodic traffic preempting priority that priority is high is low.
10. according to each described service transmission processing methods of claim 1-5, it is characterized in that, also comprise:
Core node reception sources fringe node continues the request for building link message of transmission, the request for building link message that described continuation sends by the source fringe node after sending request for building link message first, if when default response threshold receives the link establishment response message in the time, do not send, and after receiving the link establishment response message or arriving maximum traffic wait thresholding, stop to send.
11. a service transmission processing methods is characterized in that, comprising:
The request for building link message that core node reception sources fringe node sends according to service request;
Core node is according to the first sub-distribution bandwidth resources of described request for building link message, and utilizes the bandwidth resources of described sub-distribution just to transmit described business;
After the bandwidth resources of described sub-distribution are just finished using, core node repeats to be described traffic assignments bandwidth resources, and the bandwidth resources of utilizing described distribution carry out business transmission, up to receive the link tear down message that the source fringe node sends when detecting the service request that does not have described business.
12. service transmission processing methods according to claim 11 is characterized in that, described core node repeats to be specially for described traffic assignments bandwidth resources:
Core node repeats to be described traffic assignments bandwidth resources with preset period.
13. a professional transmission processing device is characterized in that, comprising:
First receiver module is used for the request for building link message that the reception sources fringe node sends according to service request; The tracking reserve requests message that the Preset Time of reception sources fringe node before the bandwidth resources of being distributed use sends when detecting the service request that also has described business;
First resource distribution module is used for according to described request for building link distribution of messages bandwidth resources; According to described tracking reserve requests distribution of messages bandwidth resources;
First data transmission module is used to the bandwidth resources transport service of utilizing first resource distribution module to distribute.
14. professional transmission processing device according to claim 13 is characterized in that, also comprises:
Second resource distribution module is used for seizing principle according to the bandwidth resources that set in advance and redistributing bandwidth resources when the bandwidth resources that described request for building link message request is distributed have been assigned to other business.
15. professional transmission processing device according to claim 14 is characterized in that, also comprises:
The warning information sending module is used for sending the alarm information of setting up link failure to described source fringe node if described business is unallocated to bandwidth resources when redistributing bandwidth resources.
16. a professional transmission processing device is characterized in that, comprising:
Second receiver module is used for the request for building link message that the reception sources fringe node sends according to service request;
The information resources distribution module, be used for according to the first sub-distribution bandwidth resources of described request for building link message, and after the bandwidth resources of described sub-distribution are just finished using, repeat to be described traffic assignments bandwidth resources, up to receive the link tear down message that the source fringe node sends when detecting the service request that does not have described business;
Second data transmission module is used to utilize the bandwidth resources of information resources module assigns to carry out the business transmission.
17. a professional transmission process system comprises the source fringe node, core node and the object edge node that are arranged in optical-fiber network, it is characterized in that described core node is used for:
The request for building link message that the reception sources fringe node sends according to service request, described request for building link message is sent to described object edge node by described source fringe node through described core node;
According to the first sub-distribution bandwidth resources of described request for building link message, and utilize the bandwidth resources of described sub-distribution just to transmit described business;
When the request that receives source fringe node transmission continues to distribute the tracking reserve requests message of bandwidth resources, distribute bandwidth resources once more according to described tracking reserve requests message, and utilize the bandwidth resources of described sub-distribution again to continue the described business of transmission; Described tracking reserve requests message sends when detecting the service request that also has described business by the source Preset Time of fringe node before the bandwidth resources of being distributed use.
18. a professional transmission process system comprises the source fringe node, core node and the object edge node that are arranged in optical-fiber network, it is characterized in that described core node is used for:
The request for building link message that the reception sources fringe node sends according to service request, described request for building link message is sent to described object edge node by described source fringe node through described core node;
According to the first sub-distribution bandwidth resources of described request for building link message, and utilize the bandwidth resources of described sub-distribution just to transmit described business;
After the bandwidth resources of described sub-distribution are just finished using, repeat to be described traffic assignments bandwidth resources, and utilize the bandwidth money of described distribution to carry out the business transmission, up to receive the link tear down message that the source fringe node sends when detecting the service request that does not have described business.
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| CN104348754A (en) * | 2013-07-26 | 2015-02-11 | 中兴通讯股份有限公司 | Bandwidth allocation method for optical burst looped network and device thereof |
| WO2016082151A1 (en) * | 2014-11-27 | 2016-06-02 | Qualcomm Incorporated | Mid-call qos update handling at a ue |
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| CN110601999A (en) * | 2018-06-12 | 2019-12-20 | 华为技术有限公司 | Method and device for reserving resources |
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| US20050030951A1 (en) * | 2003-08-06 | 2005-02-10 | Christian Maciocco | Reservation protocol signaling extensions for optical switched networks |
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| WO2017140264A1 (en) * | 2016-02-19 | 2017-08-24 | 中兴通讯股份有限公司 | Resource allocation method and apparatus for system access |
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| CN110601999A (en) * | 2018-06-12 | 2019-12-20 | 华为技术有限公司 | Method and device for reserving resources |
| CN110601999B (en) * | 2018-06-12 | 2022-03-04 | 华为技术有限公司 | Method and device for reserving resources |
| CN111277316A (en) * | 2019-12-27 | 2020-06-12 | 北京邮电大学 | Data transmission method, device and system based on optical burst switching network |
| CN113965286A (en) * | 2021-09-28 | 2022-01-21 | 昆高新芯微电子(江苏)有限公司 | Detection and judgment method and device for TSN time window |
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