CN101202701B - Method for distributing band width of assemblage useable bit rate transaction in grouping network - Google Patents
Method for distributing band width of assemblage useable bit rate transaction in grouping network Download PDFInfo
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- CN101202701B CN101202701B CN200610165806A CN200610165806A CN101202701B CN 101202701 B CN101202701 B CN 101202701B CN 200610165806 A CN200610165806 A CN 200610165806A CN 200610165806 A CN200610165806 A CN 200610165806A CN 101202701 B CN101202701 B CN 101202701B
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Abstract
The invention discloses a method for distributing bandwidths for collected available bit rate service in a grouping network and relates to the field of data communication, which is designed to solve the problems of ensuring the minimum bandwidth of an ABR service flow and dynamically adjusting the speed of the service flow between a peak speed and a lowest speed simultaneously. The invention carries through flow distribution on each available bit rate flow, the data in each available bit rate flow is grouped and divided into a part of ensuring the minimum speed and a part of exceeding the lowest speed according to the actual speed, which are respectively distributed into a bandwidth ensuring data array and an available bandwidth different expending array for treatment. The invention is suitable for distributing bandwidth for the collected available bit rate service in the grouping network.
Description
Technical field
The present invention relates to data communication field, relate in particular in packet network method for ABR (Available Bit Rate) the traffic assignments bandwidth that converges.
Background technology
Guarantee that professional service quality is the key issue that needs to be resolved hurrily in the packet network.Network need carry polytype business; Different service has sizable dissimilar quality of service requirement of variation; When the different business stream that gets into the consolidated network medium is made the multichannel statistic multiplexing together, different business stream because of have separately characteristic through interaction with the traffic affecting performance.
A kind of business that the ABR service concept is proposed by ATM (asynchronous transfer mode) forum, network need guarantee a minimum speed limit (or bandwidth) to the ABR Business Stream, the speed of Business Stream can adjustment dynamically between peak rate and minimum assurance speed.The ABR business need can be adjusted information source speed adaptively according to network operation situation.Email, file transfer, LAN (local area network (LAN)) interconnected emulation etc. on the packet network at present can be adopted this business model.
For the business such as the ABR of variable bit rate, aspect the bandwidth certain guarantee is provided for them, but their actual bandwidth is variable again, this just requires, and can dynamic change into the bandwidth of these traffic flow assignment; Simultaneously, limit the influence that the interaction partners QoS (service quality) of different business stream ensures, as the business that prevents variable bit rate and best-effort (transmitting as possible) stream tying up the bandwidth of needs assurance.
Existing method of carrying out allocated bandwidth for the ABR business all is based on ATM's.In ATM, come the delivery network condition information through adopting special cell to be analogous to means of signaling, regulate the transmission rate of information source, the distribution through virtual path and Virtual Channel realizes the multiplexing of ABR Business Stream.Existing patent about the ABR Business Stream mainly is to have taked different measures at the aspects such as distribution method of velocity regulating method, virtual path and Virtual Channel.The patent No. is that US6657959, name are called the United States Patent (USP) of " Systems and methods for implementing ABR with guaranteed MCR "; The patent No. is that US6512743, name are called the United States Patent (USP) of " Bandwidth allocation for ATM available bit rate service "; The patent No. is that US6212196, name are called the United States Patent (USP) of " Multiple access communication system and method for multiple accesscommunication "; The patent No. is that US5841777, name are called the United States Patent (USP) of " System and method foraccommodating ABR and CBR traffic on a shared communications channel "; The patent No. is that US6385168, name are called the United States Patent (USP) of " Fair share bandwidth allocation algorithm and device "; The patent No. is that CN00803313, name are called the Chinese patent of " the available bit rate engine in the packet switching system ", is not always the case.
Along with networks development, packet network such as IP (internet protocol) network also need have provides ABR professional ability.Having now and in packet network, be the thinking of ABR traffic assignments bandwidth, mainly is that the method for using among the ATM is made regulating and controlling to the speed of ABR Business Stream.And this method is used in and has two shortcomings in the packet network, the one, be difficult to control influencing each other between the different business stream, and two pairs every ABR flow point is not controlled, dealing with complicated, poor expandability.
Diff-serv (differentiated services) is mapped to this business in certain class of service according to the quality of service requirement of business, can carry out classification processing to business polymerization, has good autgmentability.But Diffserv provides a kind of relative service quality, if be used to provide the ABR business, service quality will have unpredictability, just is difficult to really be guaranteed like the minimum speed limit (or minimum bandwidth) of ABR business need.
Summary of the invention
Technical problem to be solved by this invention is to provide in a kind of packet network the method for distributing bandwidth for the available bit rate that converges, and in packet network, for the ABR business that converges provides the distribution bandwidth, guarantees for each ABR Business Stream provides minimum bandwidth.
For solving the problems of the technologies described above; The technical scheme that the present invention adopts; For the available bit rate that converges distributes the method for bandwidth to be achieved in that every Available Bit Rate stream is carried out assignment of traffic in the packet network, with the packet in every Available Bit Rate stream, by its actual speed rate; Be divided into part that guarantees minimum speed limit and the part that exceeds minimum speed limit, be assigned to the formation of assurance band data respectively and go to handle with expanding in the formation of available bandwidth difference; The concrete steps that the transfer rate of every Available Bit Rate stream is regulated by congested control are:
(a1) come automatic network downstream or local congested control announcement, congestion processing is carried out in the formation of indication expansion available bandwidth difference;
(a2) formation of expansion available bandwidth difference is done congestion processing in this locality, and congested control announcement is distributed to the assignment of traffic processing section of each Available Bit Rate stream;
(a3) the assignment of traffic processing section is again through the traffic shaping part; Congested control announcement is passed to the network upper reaches of each the Available Bit Rate stream that has exceeded minimum transmission rate; Require available bit rate to send point and reduce transmission rate; In case and network is idle, send point just through attempting increasing the transfer rate of Available Bit Rate stream;
Before said every Available Bit Rate stream is carried out assignment of traffic, earlier every Available Bit Rate stream is carried out traffic shaping and handle.
Wherein, the minimum assurance speed summation of the Available Bit Rate stream that converges corresponding to this formation of the forwarding rate of said assurance band data formation.
Wherein, said being assigned to exceeds the minimum speed limit part in the formation of expansion available bandwidth difference, is assigned to different priority to handling in the row.
Said being assigned to exceeds the minimum speed limit part in the formation of expansion available bandwidth difference, can also handle by the mode of first in first out.
Wherein, to traffic shaping, assignment of traffic, the calculating of assurance band data formation forwarding rate summation, priority query's distribution of every Available Bit Rate stream, all the specifications of quality parameter request according to each Available Bit Rate stream carries out.The specifications of quality parameter request of each Available Bit Rate stream obtains interface from stream information and obtains, and is managed by the stream standard.
Through every ABR Business Stream being divided into the part of guaranteeing minimum speed limit and the part that exceeds minimum speed limit; Be assigned to respectively and guarantee to go to handle in band data formation and the formation of expansion available bandwidth difference; Both guaranteed the minimum bandwidth of ABR Business Stream, the speed of Business Stream can adjustment dynamically between peak rate and minimum speed limit simultaneously.
Every ABR Business Stream is at first carried out traffic shaping handle, can guarantee that the maximum rate of every ABR Business Stream and the burst of stream are no more than the regulation that flows standard, make every ABR Business Stream to shunt processing according to the stream code requirement.In addition, through the transfer rate that the ABR Business Stream is regulated in congested control, not only can not make the minimum of every ABR Business Stream guarantee that speed is unaffected, and keep the resource utilization of network.
Convergence processing through ABR stream can significantly reduce the formation that network need be managed, and has reduced complexity and has realized difficulty, and downstream network can be handled to convergence flow, has reduced the complexity that downstream network is handled.
Description of drawings
Shown in Figure 1 is solution block diagram provided by the invention.
Shown in Figure 2 is the stream treatment technology of token bucket algorithm commonly used.
The modified model dual output formation token bucket algorithm stream treatment technology that adopts among the present invention of being shown in Figure 3.
Embodiment
Below in conjunction with accompanying drawing detailed explanation is done in practical implementation of the present invention.
The invention provides a kind of in packet network, for the ABR business that converges provides the distribution bandwidth, the method that provides minimum bandwidth to guarantee for each ABR Business Stream.Main thought of the present invention is: come informing network upstream regulation ABR Business Stream speed according to the congested announcement in the network; With the bandwidth separated into two parts of distributing to the ABR Business Stream: the minimum of guaranteeing minimum speed limit guarantees portions of bandwidth and the expansion available bandwidth that exceeds minimum speed limit; Divide in two-part traffic packets and deliver to different formations convergence processing respectively; Guarantee the minimum bandwidth of ABR Business Stream, the speed of Business Stream can adjustment dynamically between peak rate and minimum speed limit simultaneously.
Fig. 1 is a solution block diagram provided by the invention, combines Fig. 1 that method of the present invention is described in detail here.
For every ABR Business Stream; At first carrying out traffic shaping handles; Guarantee that the minimum-rate of every ABR stream, the burst rate of stream do not exceed the regulation that flows standard, traffic shaping can adopt general token bucket algorithm, and the Control Parameter of token bucket is taken from the corresponding QoS standard parameter of ABR stream.
ABR stream is through after the shaping; Making assignment of traffic handles; Assignment of traffic by actual speed rate, is divided into the part of guaranteeing minimum speed limit and the part that exceeds minimum speed limit with the packet in the ABR stream; Be assigned to the formation of assurance band data respectively and go to handle with expanding in the formation of available bandwidth difference, the grouping in the different queue will be handled respectively by different modes it.Guarantee that the band data formation is in order to guarantee the minimum bandwidth of every stream; The forwarding rate of this formation guarantees the speed summation corresponding to the minimum of the ABR stream that this formation is converged; Be this formation and guarantee a total bandwidth, this bandwidth guarantees the summation of bandwidth for the minimum of each ABR stream; And each ABR of expansion available bandwidth difference queue processing flows the grouping of sending with respect to the minimum-rate pilosity when exceeding minimum-rate; Converge these groupings that belong to different ABR streams; These groupings can be according to other attribute such as the packet loss requirement of each ABR stream; Be assigned in the different priority queries, handle by the sorting technique that is analogous to Diff-serv.
If the minimum-rate that regulation need guarantee in the parameter standard of ABR is r, actual speed rate is v, after then handling through assignment of traffic, guarantees that the flow rate of band data formation output will be r, and the flow rate p of expansion available bandwidth difference formation output is p=v-r.After destination gathers, ABR will keep its actual speed rate v=p+r.
Assignment of traffic can adopt modified model dual output formation token bucket algorithm stream treatment technology described below.Fig. 2 has shown the processing of leakage bucket rate-limiting algorithm convection current commonly used.Through leaking the bucket rate-limiting algorithm, unadjusted stream of packets is placed in the packet queue of Lou bucket formation adjuster control.Can stored packet if the grouping of this stream of packets representative surpasses formation, the grouping that has more so will be dropped.When the packet arrives queue heads, they with formation regulator configuration decision, network can absorb or the speed being ready to absorb is forwarded in the network.The length of packet queue (or degree of depth) is limiting admissible burst sizes.
Fig. 3 has shown can be in order to carry out the modified model dual output formation token bucket algorithm stream treatment technology of flow distribution among the present invention.With respect to token bucket algorithm commonly used, its main improvement is, when the grouping of stream of packets representative exceeds the packet queue that leaks the control of bucket formation adjuster can stored packet the time, is not to abandon the grouping that has more, but puts it in second formation.The grouping of second formation will be transmitted by FIFO (first in first out) mode.If the minimum-rate that regulation need guarantee in the parameter standard of ABR is r; Actual speed rate is v; After then handling through modified model dual output formation token bucket algorithm stream, the flow rate after the shaping of first formation output is r, and the flow rate p of second formation output is p=v-r.After destination gathers, ABR will keep its actual speed rate v=p+r.
The input of the assurance band data formation among Fig. 1 is equivalent to the output that modified model dual output formation token bucket algorithm stream is handled first formation; The input of the expansion available bandwidth difference formation among Fig. 1 is equivalent to the output that modified model dual output formation token bucket algorithm stream is handled second formation.
Guarantee that the band data formation is used to converge the minimum assurance data rate stream of ABR stream ABR (1)-ABR (n).Network allocation guarantees for the bandwidth that guarantees the band data formation, can not be seized.The minimum bandwidth that will guarantee that is made as stream ABR (i) regulation is B (i), is
just for the total bandwidth that guarantees the band data queue assignment then.Total bandwidth admits a Business Stream just to add the B (i) that this stream is corresponding according to the admittance and the dynamically adjustment of release of ABR stream, discharges a Business Stream and just deducts the corresponding B (i) of this stream.
The formation of expansion available bandwidth difference is used to converge (v-r) grouped data partly of ABR stream ABR (1)-ABR (n).These groupings can be assigned in m the different priority query according to other attribute such as the packet loss requirement of each ABR stream, carry out classification processing by the method that is analogous to Diff-serv.In the present invention, m can be equal to or greater than 1.
Traffic shaping in the said process, flow distribution, the minimum bandwidth summation that guarantees are calculated (promptly guaranteeing the calculating of band data formation forwarding rate summation) and priority query's distribution etc., all need require according to the QoS standard parameter of each ABR Business Stream carry out.The stream standard is used to manage the QoS standard parameter requirement of ABR Business Stream, obtains interface from stream information.Stream information obtains admittance release information and the requirement of QoS standard parameter that interface is used to obtain the ABR Business Stream, can obtain from the QoS management platform on upper strata, also can in the band that transmits the plane, obtain the data.
The transfer rate of ABR Business Stream is regulated by congested control.The bandwidth that guarantees the band data formation need be guaranteed, and not influenced by congested control.The formation of expansion available bandwidth difference then need be made congested control and treatment to the ABR stream that is converged.
Congested control announcement can come the automatic network downstream, also can tie up the bandwidth that the ABR business has taken like the high-level business need of other type from this locality.Come automatic network downstream or local congested control announcement, received by the formation of expansion available bandwidth difference, congestion processing is carried out in the formation of indication expansion available bandwidth difference.
The formation of expansion available bandwidth difference is done in this locality as congestion processing such as grouping abandons, packet-priority degradation on the one hand, on the one hand congested control announcement is distributed to the flow distribution processing section of each the ABR Business Stream that is positioned at its front.
ABR flow distribution processing section need judge whether and need make congestion processing to this ABR stream.In aforesaid modified model dual output formation token bucket algorithm stream treatment technology, a flag bit is set, in order to mark second formation whether data are arranged.If second formation does not have data, explain that the speed of this ABR Business Stream can not reduce again, need not make speed and regulate this ABR stream, promptly unnecessaryly do further congestion processing; If second formation has data; Explain that present rate has exceeded minimum assurance speed, can do the speed adjusting by this ABR stream, at this moment through the traffic shaping part congested control announcement is passed to the network upper reaches again; Require to send point and reduce transmission rate, thereby adjusted the transfer rate of ABR Business Stream.
After coming the congestion relief of automatic network downstream or this locality, each processing section is found to no longer include congested announcement, just stops congested control and treatment.In case network is idle, the ABR Business Stream just can be by sending point through attempting increasing the transfer rate of Business Stream.
The method of the invention has combined the advantage of integrated service model and differentiated services model, can be the ABR traffic assignments bandwidth that converges in packet network, guarantees for each ABR Business Stream provides minimum bandwidth, has kept the resource utilization of network simultaneously; Convergence processing through ABR stream can significantly reduce the formation that network need be managed, and has reduced complexity and has realized difficulty.
Utilize the method for the invention, same ABR stream will separately be delivered to different formations and handle, and possibly cause packet out-of-sequence like this, need do out-of-sequence processing at the upstream and downstream of network.
Claims (6)
1. the method for distributing bandwidth in the packet network for the available bit rate that converges; It is characterized in that: every Available Bit Rate stream is carried out assignment of traffic; With the packet in every Available Bit Rate stream; By its actual speed rate, be divided into part that guarantees minimum speed limit and the part that exceeds minimum speed limit, be assigned to the formation of assurance band data respectively and go to handle with expanding in the formation of available bandwidth difference; The concrete steps that the transfer rate of every Available Bit Rate stream is regulated by congested control are:
(a1) come automatic network downstream or local congested control announcement, congestion processing is carried out in the formation of indication expansion available bandwidth difference;
(a2) formation of expansion available bandwidth difference is done congestion processing in this locality, and congested control announcement is distributed to the assignment of traffic processing section of each Available Bit Rate stream;
(a3) the assignment of traffic processing section is again through the traffic shaping part; Congested control announcement is passed to the network upper reaches of each the Available Bit Rate stream that has exceeded minimum transmission rate; Require available bit rate to send point and reduce transmission rate; In case and network is idle, send point just through attempting increasing the transfer rate of Available Bit Rate stream;
Before said every Available Bit Rate stream is carried out assignment of traffic, earlier every Available Bit Rate stream is carried out traffic shaping and handle.
2. distribute the method for bandwidth in the packet network according to claim 1 for the available bit rate that converges, it is characterized in that: the minimum assurance speed summation of the Available Bit Rate stream that the forwarding rate of said assurance band data formation converges corresponding to this formation.
3. the method for distributing bandwidth in the packet network according to claim 2 for the available bit rate that converges; It is characterized in that: said being assigned to exceeds the minimum speed limit part in the formation of expansion available bandwidth difference, is assigned to different priority to handling in the row.
4. distribute the method for bandwidth in the packet network according to claim 2 for the available bit rate that converges, it is characterized in that: said being assigned to exceeds the minimum speed limit part in the formation of expansion available bandwidth difference, handles by the mode of first in first out.
5. according to the method for distributing bandwidth in claim 3 or the 4 described packet networks for the available bit rate that converges; It is characterized in that: traffic shaping, assignment of traffic, the calculating of assurance band data formation forwarding rate summation, priority query to every Available Bit Rate stream distribute, and all the specifications of quality parameter request according to each Available Bit Rate stream carries out.
6. distribute the method for bandwidth in the packet network according to claim 5 for the available bit rate that converges, it is characterized in that: the specifications of quality parameter request of said each Available Bit Rate stream obtains interface from stream information and obtains, and is managed by the stream standard.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109716683A (en) * | 2016-09-30 | 2019-05-03 | 网络洞察力知识产权公司 | Time synchronization in real time content dissemination system |
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| CN101621457B (en) * | 2008-07-01 | 2012-05-23 | 大唐移动通信设备有限公司 | Multi-service scheduling method and system |
| US8208395B2 (en) * | 2008-10-31 | 2012-06-26 | Verizon Patent And Licensing Inc. | System and method for measuring interface utilization using policers |
| KR102107514B1 (en) * | 2013-04-18 | 2020-05-07 | 삼성전자주식회사 | Method and apparatus for managing dynamic que in broadcasting system |
| CN106330753A (en) * | 2015-06-26 | 2017-01-11 | 中兴通讯股份有限公司 | Stream processing method and device |
| CN107135171B (en) * | 2016-02-29 | 2021-06-29 | 华为技术有限公司 | Multimedia stream transmission method and media stream sending equipment |
| CN106713176B (en) * | 2016-12-12 | 2020-04-17 | 全球能源互联网研究院有限公司 | Service rate control method and device for control plane time synchronization queue |
| CN106789721B (en) * | 2017-03-24 | 2021-01-05 | 深圳市吉祥腾达科技有限公司 | Intelligent QOS method and system based on token bucket |
| CN112073334B (en) * | 2019-07-09 | 2023-09-12 | 北京天德科技有限公司 | Virtual expressway |
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| CN1625871A (en) * | 2002-04-12 | 2005-06-08 | 西门子公司 | Method for commonly controlling bandwidth of a group of individual information flows |
| WO2004112406A1 (en) * | 2003-06-18 | 2004-12-23 | Utstarcom (China) Co. Ltd. | Method for implementing diffserv in the wireless access network of the universal mobile telecommunication system |
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| CN109716683A (en) * | 2016-09-30 | 2019-05-03 | 网络洞察力知识产权公司 | Time synchronization in real time content dissemination system |
| CN109716683B (en) * | 2016-09-30 | 2021-03-19 | 网络洞察力有限公司 | Time synchronization in real-time content distribution systems |
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