CN101420359B - Bandwidth allocation system and method in passive optical network - Google Patents
Bandwidth allocation system and method in passive optical network Download PDFInfo
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- CN101420359B CN101420359B CN2007101634184A CN200710163418A CN101420359B CN 101420359 B CN101420359 B CN 101420359B CN 2007101634184 A CN2007101634184 A CN 2007101634184A CN 200710163418 A CN200710163418 A CN 200710163418A CN 101420359 B CN101420359 B CN 101420359B
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Abstract
The present invention discloses a bandwidth distribution system in a passive optical network and a method thereof. The method comprises steps of (1) mapping the data on an optical line terminal (OLT) and an optical network terminal (ONT) according to the service type of the data to a corresponding data buffer area, the optical network terminal sending report information to the optical line terminal to report occupation proportion of the data buffer area; (2) the optical line terminal receiving the report information and adjusting bandwidths distributed to the optical network terminal according to the occupation proportion of the data buffer area and the service level corresponding to the data buffer area in the information; (3) the optical line terminal sending the bandwidth authorization to the optical network terminal to complete the bandwidth adjustment for the optical network terminal. According to the bandwidth distribution system in a passive optical network and the method thereof, occupation bandwidths of the services are distributed dynamically according to the occupation proportion of the data buffer area and the need of bandwidths corresponding to different services which are reported by the ONT, therefore, not only the bandwidths' need of higher priority services can be assured, but also the utilization rate of the bandwidths can be assured.
Description
Technical field
The present invention relates to the broadband access communication technical field in the Internet, more particularly, relate to the distribution system and the method for a kind of PON (Passive Optical Network, EPON) network bandwidth.
Background technology
Optical-fiber network is exactly the optical networking of saying usually, and its transmission medium is an optical fiber.In common network, data-signal is carrier with the electricity, distinguishes 0 and 1 by the height of voltage, and in optical-fiber network, what carry data is laser, and by generating laser, the laser of emission varying strength distinguishes 0 and 1.Because what common twisted-pair feeder used is the signal of telecommunication, limited transmission distance system, for example the theoretical maximum transmission distance of 5 class lines is about 100 meters.Use fiber network, light signal transmits on optical fiber, and according to the type of optical fiber and the power of signal generator, the transmission range of monomode fiber can reach tens kilometers.The backbone network in general city all is an optical networking.
Along with the continuous development and the light of Access Network advances the evolution that copper moves back, Optical Access Network is more and more universal, and its mid point has vast potential for future development to the optical network system of multiple spot the most suitable user's practical business demand.
PON utilizes point to realize the broadband access technology that the multi-user inserts to the optical-fiber network of multiple spot, can provide higher access bandwidth to the user.The PON network comprises local side apparatus (Optical LineTerminal, OLT) and subscriber terminal equipment (Optical Network Terminal, ONT), the PON port of an OLT can connect a plurality of ONT, constituting fiber optic network by optical fiber and optical branching device between OLT and the ONT is connected, a plurality of ONT share the PON port bandwidth of an OLT, the data that ONT sends to OLT are divided into the business of the different grades of service, in order to guarantee that the high service bandwidth of priority can preferentially guarantee, and make a plurality of ONT can use shared bandwidth efficiently, need to guarantee the bandwidth of higher-priority service, other bandwidth can effectively utilize simultaneously.So how to achieve the above object, the problem that need consider when being allocated bandwidth.
Summary of the invention
Technical problem to be solved by this invention provides the allocated bandwidth system and method in a kind of EPON, can guarantee the bandwidth of higher priority business, can guarantee bandwidth availability ratio again, and has the advantages of simplicity and high efficiency characteristics.
In order to solve the problems of the technologies described above, the invention provides the allocated bandwidth system in a kind of EPON, comprise ustomer premises access equipment and local side apparatus, described ustomer premises access equipment comprises:
Data buffer zone situation sending module is used for occupation proportion with the data buffer zone of ustomer premises access equipment interface and sends and report to local side apparatus;
The bandwidth allocation request module is used for sending service request, the distribution of bandwidth on demand to described local side apparatus;
Described local side apparatus comprises: bandwidth allocation module, be used to finish management control to bandwidth, and according to the request of described bandwidth allocation request module, and dynamically adjust the transmission bandwidth of ustomer premises access equipment according to the bandwidth usage situation.
Further, described local side apparatus also comprises:
Data buffer zone threshold setting module is used to the data buffer zone of ustomer premises access equipment interface that threshold value is set;
Data buffer zone situation judge module is used for the situation that takies and described threshold with the data buffer zone of ustomer premises access equipment interface, and comparative result is sent to described bandwidth allocation module.
The present invention also provides the bandwidth allocation methods in a kind of EPON, said method comprising the steps of:
(1) type of service according to data is hinted obliquely at corresponding data buffer zone to data on local side apparatus and ustomer premises access equipment, and ustomer premises access equipment sends report information to local side apparatus, reports the occupation proportion of described data buffer zone;
(2) local side apparatus receives described report information, according to the occupation proportion and the data buffer zone corresponding service grade of the data buffer zone in the information, adjusts the bandwidth of distributing to ustomer premises access equipment;
(3) local side apparatus sends bandwidth authorizing to ustomer premises access equipment, finishes the bandwidth adjustment to ustomer premises access equipment.
Further, user side sends report information to local side apparatus described in the step (1), comprising: described ustomer premises access equipment periodically sends report information to local side apparatus.
Further, step also comprises in (1): the grouping of described data buffer zone is corresponding, and described ustomer premises access equipment periodically sends report information to local side apparatus, the occupation proportion of grouping report data buffering area.
Further, also comprise in the step (1): on local side apparatus, the occupation proportion threshold value is set for each data buffer zone; Accordingly,
According to the result and the data buffer zone corresponding service grade of the occupation proportion threshold of the occupation proportion of the data buffer zone in the information and described data buffer zone, adjust the bandwidth of distributing to ustomer premises access equipment in the step (2).
Further, described with the data buffer zone grouping, comprising: according to the grade of service divided into groups in described data buffer zone, the described grade of service comprises: fixed-bandwidth business, assurance band width service and the band width service of doing one's best.
Further, described fixed-bandwidth business is the business of time multiplexing date, and the described band width service that guarantees is a video traffic, and the described band width service of doing one's best is web page browsing and downloading service.
Further, adjust the bandwidth of distributing to ustomer premises access equipment described in the step (2), comprising:
For the fixed-bandwidth business, local side apparatus distributes fixing bandwidth of authorizing, and does not consider the situation that takies of the data buffer zone of ustomer premises access equipment report;
For guaranteeing band width service, the situation according to different user end equipment and professional application guarantees bandwidth as possible, when guaranteeing that the band width service bandwidth need increase, take the band width service of doing one's best, when guaranteeing that band width service reduces, give the band width service of doing one's best this part allocated bandwidth;
For the band width service of doing one's best, except the professional bandwidth of distributing with the assurance band width service of fixed-bandwidth, remaining bandwidth is shared by all business applications.
Allocated bandwidth system and method in the EPON provided by the invention, the needs of the corresponding bandwidth of the situation that takies of the data buffer zone that reports according to ONT and different business, the occupied bandwidth of the described business of dynamic assignment, the bandwidth demand of higher priority business can be guaranteed, bandwidth availability ratio can be guaranteed again.
Description of drawings
Fig. 1 is the bandwidth Adjustment System schematic diagram of EPON of the present invention.
Fig. 2 is a bandwidth allocation methods flow chart of the present invention.
Embodiment
The present invention receives the data buffering zone state of ONT periodic report by OLT, and in conjunction with described data buffer zone corresponding service grade, dynamically adjusts the bandwidth of distributing to ONT.
, but not as a limitation of the invention below in conjunction with accompanying drawing to a preferred embodiment of the present invention will be described in detail.
With reference to shown in Figure 1, be the bandwidth Adjustment System schematic diagram of EPON of the present invention.This system comprises PON local side apparatus 11 and PON ustomer premises access equipment 12, connects by fiber optic network 13 between them.
Ustomer premises access equipment 12 comprises:
Data buffer zone situation sending module 121 is used for the situation that the takies transmission of data buffer zone is reported to local side apparatus 11;
Bandwidth allocation request module 122 is used for sending service request, the distribution of bandwidth on demand to described local side apparatus 11.
Described local side apparatus comprises:
Data buffer zone threshold setting module 111 is used to the data buffer zone of the PON interface of ustomer premises access equipment 12 that threshold value is set;
Data buffer zone situation judge module 112 is used for the situation that takies and the described threshold of data buffer zone of the interface of the ustomer premises access equipment 12 that will receive, and comparative result is sent to described bandwidth allocation module;
Described fiber optic network 13 is that point connects a network to the optical fiber of multiple spot, comprises optical fiber and optical branching device, and optical branching device couples together an optical fiber and multifiber and constitutes fiber optic network 13, connects OLT and ONU.
With reference to shown in Figure 2, be bandwidth allocation methods flow chart of the present invention.Said method comprising the steps of:
Step 201: the type of service according to data on OLT and ONT is hinted obliquely at corresponding data buffer zone to data, the situation that takies of data buffer zone in the data buffer zone group of ONT periodic report ONT, and the described situation that takies is an occupation proportion;
Wherein the data buffer zone group of ONT is to be made of a plurality of data buffer zones, and the data buffer zone can be divided according to the grade of service.An ONT can have a plurality of data buffer zones group.
Step 202:OLT receives the report information of ONT, according to the situation that takies and the data buffer zone corresponding service grade of the data buffer zone in the information, dynamically adjusts the bandwidth of distributing to ONT;
Described data buffer zone corresponding service grade, its grade of service comprises from high to low: fixed-bandwidth business, the business that guarantees bandwidth, the professional Three Estate of doing one's best.
Specifically, can trigger allocated bandwidth by on OLT, setting corresponding threshold value according to the occupation proportion of buffering area.For the fixed-bandwidth business, OLT distributes fixing bandwidth of authorizing, and need not comprehend the buffer state of ONT report; For the business that guarantees bandwidth, according to the professional hereto bandwidth that takies of the threshold value adjustment in different data buffer size district, if the occupation proportion of data buffer zone has surpassed the threshold value of himself, then increase this professional bandwidth, when threshold value less than buffering area, reduce this professional bandwidth, increase and the method that reduces bandwidth can be finished by the dispatching algorithm of buffer data transmission rate.Will be when adjusting in conjunction with the situation of business application, the adjustment strategy is: guarantee bandwidth as possible, when the service bandwidth of assurance bandwidth need increase, if this moment its corresponding data buffer zone of professional institute occupation proportion above himself threshold value, then the business of doing one's best can be taken, but the fixed-bandwidth business can not be taken.Accordingly, when guaranteeing that band width service reduces, use to the business of doing one's best this part bandwidth; For the business of doing one's best, except the professional bandwidth of distributing with the assurance band width service of fixed-bandwidth, remaining bandwidth is shared by all business applications.As seen, be to adjust in minute timing according to certain priority.
Step 203:OLT sends bandwidth authorizing to ONT, finishes the bandwidth adjustment to ONT.
Come technical scheme of the present invention is carried out exemplary explanation below by the example in the concrete application.
At first carry out following configuration:
One, determines how to divide the grade of service as required, comprise fixed-bandwidth, guarantee bandwidth, the bandwidth of doing one's best, in the present embodiment, the service definition of time multiplexing date is the fixed-bandwidth business, and video etc. are professional for guaranteeing band width service, and general web page browsing and downloading service are Best-Effort service.
Two, the type of service according to data is hinted obliquely at corresponding data buffer zone to data on OLT and ONT.For the different buffering area of ONT, on OLT, can set the occupation proportion threshold value of buffering area, adjust according to described threshold triggers bandwidth, thereby how OLT can carry out allocated bandwidth according to the decision of buffering area report information.
The step of dynamically adjusting bandwidth is as follows:
Step 1: the data buffer zone group state of ONT periodic report ONT, the situation that takies of each data buffer zone is included in the report of ONT;
Step 2: OLT receives the report information of ONT, according to the setting of data buffer zone group state in the information and data buffer zone corresponding service grade, dynamically adjusts the bandwidth of distributing to ONT.For the fixed-bandwidth business, OLT distributes fixing bandwidth of authorizing, and need not comprehend the buffer state of ONT report; For the business that guarantees bandwidth, situation according to different ONT and professional application, guarantee bandwidth as possible, when the service bandwidth of assurance bandwidth need increase, can take the business of doing one's best, but can not take the fixed-bandwidth business, when guaranteeing that band width service reduces, use to the business of doing one's best this part bandwidth; For the business of doing one's best, except the professional bandwidth of distributing with the assurance band width service of fixed-bandwidth, remaining bandwidth is shared by all business applications;
Step 3: OLT sends bandwidth authorizing to ONT, and ONT sends data according to the bandwidth authorizing that sends, and finishes the bandwidth adjustment to ONT.
OLT resolves for the report of a plurality of ONT that connect, and, dynamically adjust allocated bandwidth according to the different requirements of the different business of different ONT for bandwidth, at first should satisfy the business of fixed-bandwidth, remaining satisfied assurance band width service, remaining bandwidth satisfies the band width service of doing one's best again.
Certainly, above-mentioned embodiment is not the further qualification to technical solution of the present invention, and any those of ordinary skill in the art replaced or corresponding improvement the technology of the present invention feature being equal to of being done, still within protection scope of the present invention.
Claims (9)
1. the allocated bandwidth system in the EPON comprises ustomer premises access equipment and local side apparatus, it is characterized in that described ustomer premises access equipment comprises:
Data buffer zone situation sending module is used for occupation proportion with the data buffer zone of ustomer premises access equipment interface and sends and report to local side apparatus;
The bandwidth allocation request module is used for sending service request, the distribution of bandwidth on demand to described local side apparatus;
Described local side apparatus comprises: bandwidth allocation module, be used to finish management control to bandwidth, according to the request of described bandwidth allocation request module, the situation that takies of binding data buffering area, and dynamically adjust the transmission bandwidth of ustomer premises access equipment according to the bandwidth usage situation.
2. the system as claimed in claim 1 is characterized in that, described local side apparatus also comprises:
Data buffer zone threshold setting module is used to the data buffer zone of ustomer premises access equipment interface that threshold value is set;
Data buffer zone situation judge module is used for the situation that takies and described threshold with the data buffer zone of ustomer premises access equipment interface, and comparative result is sent to described bandwidth allocation module.
3. the bandwidth allocation methods in the EPON is characterized in that, said method comprising the steps of:
(1) type of service according to data is hinted obliquely at corresponding data buffer zone to data on local side apparatus and ustomer premises access equipment, and ustomer premises access equipment sends report information to local side apparatus, reports the occupation proportion of described data buffer zone;
(2) local side apparatus receives described report information, according to the occupation proportion and the data buffer zone corresponding service grade of the data buffer zone in the information, adjusts the bandwidth of distributing to ustomer premises access equipment;
(3) local side apparatus sends bandwidth authorizing to ustomer premises access equipment, finishes the bandwidth adjustment to ustomer premises access equipment.
4. method as claimed in claim 3 is characterized in that, user side sends report information to local side apparatus described in the step (1), comprising: described ustomer premises access equipment periodically sends report information to local side apparatus.
5. method as claimed in claim 4 is characterized in that, step also comprises in (1): the grouping of described data buffer zone is corresponding, and described ustomer premises access equipment periodically sends report information to local side apparatus, the occupation proportion of grouping report data buffering area.
6. method as claimed in claim 3 is characterized in that, step also comprises in (1): for each data buffer zone the occupation proportion threshold value is set on local side apparatus; Accordingly,
According to the result and the data buffer zone corresponding service grade of the occupation proportion threshold of the occupation proportion of the data buffer zone in the information and described data buffer zone, adjust the bandwidth of distributing to ustomer premises access equipment in the step (2).
7. method as claimed in claim 5, it is characterized in that, described with the data buffer zone grouping, comprising: according to the grade of service divided into groups in described data buffer zone, the described grade of service comprises: fixed-bandwidth business, assurance band width service and the band width service of doing one's best.
8. method as claimed in claim 7 is characterized in that, described fixed-bandwidth business is the business of time multiplexing date, and the described band width service that guarantees is a video traffic, and the described band width service of doing one's best is web page browsing and downloading service.
9. method as claimed in claim 7 is characterized in that, adjusts the bandwidth of distributing to ustomer premises access equipment described in the step (2), comprising:
For the fixed-bandwidth business, local side apparatus distributes fixing bandwidth of authorizing, and does not consider the situation that takies of the data buffer zone of ustomer premises access equipment report;
For guaranteeing band width service, the situation according to different user end equipment and professional application guarantees bandwidth as possible, when guaranteeing that the band width service bandwidth need increase, take the band width service of doing one's best, when guaranteeing that band width service reduces, give the band width service of doing one's best this part allocated bandwidth;
For the band width service of doing one's best, except the professional bandwidth of distributing with the assurance band width service of fixed-bandwidth, remaining bandwidth is shared by all business applications.
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102946322B (en) * | 2012-10-17 | 2016-03-30 | 北京奇虎科技有限公司 | Bandwidth occupancy management method and device |
| CN102932273B (en) * | 2012-10-17 | 2015-07-01 | 北京奇虎科技有限公司 | Method and device for adjusting occupation of process bandwidth |
| CN103532868B (en) * | 2013-11-01 | 2016-10-26 | 国网上海市电力公司 | Power system network bandwidth and flow control methods |
| CN103607266A (en) * | 2013-11-28 | 2014-02-26 | 中国联合网络通信集团有限公司 | Method and device for sending signals |
| CN105100830B (en) * | 2015-07-23 | 2019-02-15 | 中国科学院声学研究所 | A kind of device and method for being switched fast video source based on video aggregation service |
| CN106412627B (en) * | 2015-07-30 | 2020-06-09 | 中国电信股份有限公司 | Method and system for controlling bandwidth used by video terminal |
| CN107483359B (en) * | 2016-06-08 | 2019-11-05 | 中兴通讯股份有限公司 | The method, apparatus and system of Dynamic Bandwidth Allocation |
| CN107995017B (en) * | 2016-10-27 | 2021-08-24 | 杭州萤石网络股份有限公司 | Uplink bandwidth allocation method, device and system |
| CN112203050B (en) * | 2020-09-30 | 2022-09-06 | 普联技术有限公司 | Method and device for continuously transmitting video |
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| CN1674471A (en) * | 2004-03-26 | 2005-09-28 | 上海贝尔阿尔卡特股份有限公司 | Control method and system used for dispatching multiclass business in passive optical network |
| CN1780223A (en) * | 2004-11-19 | 2006-05-31 | 上海贝尔阿尔卡特股份有限公司 | Various-service dispatching method and system in passive light network |
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| US6546014B1 (en) * | 2001-01-12 | 2003-04-08 | Alloptic, Inc. | Method and system for dynamic bandwidth allocation in an optical access network |
| CN1674471A (en) * | 2004-03-26 | 2005-09-28 | 上海贝尔阿尔卡特股份有限公司 | Control method and system used for dispatching multiclass business in passive optical network |
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