CN101166130B - A distributed realization method for L2 multicast function - Google Patents
A distributed realization method for L2 multicast function Download PDFInfo
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- CN101166130B CN101166130B CN200610149921A CN200610149921A CN101166130B CN 101166130 B CN101166130 B CN 101166130B CN 200610149921 A CN200610149921 A CN 200610149921A CN 200610149921 A CN200610149921 A CN 200610149921A CN 101166130 B CN101166130 B CN 101166130B
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Abstract
Being related to technique of broadband access, the invention implements balanced loads for core board and user board properly so as to raise ability for processing protocol for entire DSLAM. The invention includes steps (1) based on configuration command, core board preprocesses and distributes data as well as decides mode for processing data; (2) if the data are global data, then core board processes data; (3) if the data are data for user board, then user board processes data the data. Improving ability for treating protocol, the invention quickens processing protocol, takes full advantage of handling ability of entire DSLAM system so as to raise efficiency of DSLAM multicast, and adapts requirements on continual increscent capacity and continual elevated demand on reliability.
Description
Technical field
The present invention relates to broadband access technology, relate in particular to a kind of method that on access device, realizes the distributed group multicast function.
Background technology
In DSLAM (Digital Subscriber Line Access Multiplexer) equipment, three kinds of board types are arranged generally: upper connective plate, core board, user's plate.Multicast two-layer protocol on current DSLAM (Internet Group Management Protocol, IGMP: all be centralized realization generally IGMP), be that protocol processes is finished on core board all, core board becomes the center that system protocol is handled, and upper connective plate and user's plate do not carry out any protocol processes.
The mode that this multicast protocol focuses on has a lot of advantages, for example:
(1) control mode of Ji Zhonging has been brought the simple and convenient of management;
(2) all multicast packets all concentrate on the core board, do not deposit any multicast packet with upper connective plate on user's plate, so this plate of two types only need less internal memory;
(3) all protocol processes all concentrate on the core board, and user's plate and upper connective plate all are the transparent transmission protocol massages, so the performance requirement of the CPU of this plate of two types is not high;
(4) user's configuration only need be configured to core board, need not be sent to user's plate, so the allocative efficiency height.
Although top many advantages are arranged, the shortcoming of this mode also is clearly:
(1) control mode of Ji Zhonging has increased the weight of the protocol processes ability of core board, for the performance requirement of core board system than higher, easily because of core board disposal ability constraint packet loss;
(2) do not make full use of the resource of user's plate, the potentiality of performance user plate.
Particularly along with the increase of capacity, that handles load increases the weight of the reliability decrease of centralized method.Therefore, necessity works out a kind of distributed implementation method and overcomes these shortcomings of the prior art again.
Summary of the invention
For overcoming defective of the prior art and deficiency, the object of the present invention is to provide a kind of distributed implementation method of L 2 multicast function, realizing giving full play to the disposal ability of user's plate, the load of suitable balanced core board and user's plate improves the protocol processes ability of whole DSLAM.
In order to reach the foregoing invention purpose, a kind of distributed implementation method of L 2 multicast function comprises:
(1) core board carries out preliminary treatment and distribution according to configuration order to data, and decision is to the processing mode of data;
(2) if data are global data, then data are handled by core board;
(3) if data are the data on user's plate, then data are handled by user's plate; Wherein, the middle core board of described step (2) is handled data and is comprised command process; Command process on the described core board is specially:
(21) common unit on the core board is configured the preliminary treatment and the distribution of order;
(22) the external command process interface unit in the multicast unit on the core board receives the configuration order and the processing of common unit distribution;
(23) by the processing unit on the core board each configuration order and configuration data are handled, and multicast protocol is handled the data set that need use safeguard;
(24) by the communication between plates unit on the core board configuration data is sent to user's plate;
User's plate is handled data and is comprised command process in the described step (3); Command process on described user's plate is specially:
(31) configuration data that on the communication between plates unit receives by core board, transmits of user's plate;
(32) configuration order of communication unit distribution and processing between the command process interface unit dash receiver on user's plate;
(33) by the processing unit on user's plate each configuration order and configuration data are handled, and multicast protocol is handled the data set that need use safeguard.
Wherein, the multicast process on core board and the user's plate is responsible for the multicast protocol processing on core board and the user's plate respectively.
Wherein, the middle core board of described step (2) is handled data and is comprised command process and protocol processes.
Wherein, the protocol processes on the described core board is specially:
(211) the reception message unit of core board carries out preliminary treatment to message;
(212) the user authority management unit on the core board carries out scope check, if authority is for refusal, then with packet loss; If authority is preview, then after handling, the preview control unit carries out the processing of multicast protocol message by protocol process module; If authority is then carried out the processing of multicast protocol message for allowing by protocol process module;
(213) information of the multicast management unit maintenance management group of core board;
(214) the multicast message transmitting element on the core board is finished the reconstruct to message, and message is sent.
Wherein, the middle user's plate of described step (3) is handled data and is also comprised protocol processes.
Wherein, the protocol processes on described user's plate is specially:
(311) the reception message unit of user's plate carries out preliminary treatment to message;
(312) the user authority management unit on user's plate carries out scope check, if authority is for refusal, then with packet loss; If authority is preview, then after handling, the preview control unit carries out the processing of multicast protocol message by protocol process module; If authority is then carried out the processing of multicast protocol message for allowing by protocol process module;
(313) information of the multicast management unit maintenance management group of user's plate;
(314) the multicast message transmitting element on user's plate is finished the reconstruct to message, and message is sent.
Compared with prior art, the present invention obtained the progress of protocol processes ability, reached the effect of accelerating protocol processes, made full use of the disposal ability of whole DSLAM system, improved the efficient of DSLAM multicast, the demand that the adaptation capacity constantly increases and reliability requirement improves constantly.
Description of drawings
Fig. 1 is a core board multicast software Organization Chart.
Fig. 2 is user's plate multicast software Organization Chart.
Fig. 3 is system parameters configuration flow figure.
Fig. 4 is an igmp querying bag process chart.
Fig. 5 is that IGMP asks to join message process chart.
Fig. 6 is an IGMP request leave message process chart.
Specific embodiment
Basic design philosophy of the present invention is as follows: still move multicast protocol on the core board, but also move multicast protocol on user's plate simultaneously, can be regarded as the two-stage exchange of core board and user's plate.Different is the management that core board is responsible for the overall situation, and user's plate only is responsible for the management of each user's plate part.Core board is all passed through in all configurations, passes to each user's plate by core board then.Also be to say, core board provides towards the interface of management, and user's plate does not provide this interface, and the configuration on user's plate need be obtained from core board.
Distributed DSLAM L 2 multicast function implementation method described in the invention comprises following aspect:
A, core board and user's plate all have a multicast process, and this process is responsible for multicast protocol and is handled.
B, core board provide towards the interface of management such as order line and simple network management (Simple Network ManagementProtocol, SNMP) agreement provides the interface of system configuration and management, and the interface that issues configuration parameter to user's plate is provided; User's plate provides from core board and receives the interface of configuration messages and the interface that message is handled.
C, core board and user's plate all provide the user authority management module, and the module of previewing module and customer call statistics determines by the user whether rights of using are managed, and make configurable.
The present invention is described in further detail below in conjunction with accompanying drawing.
Core board and user's plate all have CPU and exchange chip, therefore all have protocol processes function and exchange capacity.Difference is the protocol processes ability of core board and exchanges requirement higher, so desirability can better chip.In addition, core board be owing to will safeguard some overall data and handle more protocol package, can be more for the demand of memory space, need the support of more jumbo memory.Simultaneously, in order to support the more exchange of high bandwidth, need the more support of the bus of high bandwidth.
Fig. 1 is a core board multicast software Organization Chart.According to for order and two lines of protocol package, the software of multicast can be divided into command process and two parts of protocol processes.
Command process partly comprises with lower unit:
(1) common unit carries out order preliminary treatment and distribution towards leading subscriber on the core board.
(2) the external command process interface unit of multicast module on the core board receives order and processing.
(3) processing unit for each configuration order and configuration data of multicast inside modules on the core board is handled the data set that need use to multicast protocol and is carried out read/write operation.
(4) communication unit between the core board upper plate is sent to user's plate with configuration.
Protocol processes partly comprises with lower unit:
(1) receives message unit on the core board, carry out the preliminary treatment of some messages.
(2) channel of multicast management and the user authority for each channel is being managed in user authority management unit on the core board, and the control user joins request.
(3) preview control unit on the core board, control have the user's of preview authority preview time, number of times and preview interval.
(4) customer call statistic unit on the core board produces the customer call statistic record, is reported to network management system.
(5) multicast management unit on the core board, the information of maintenance management group.
(6) processing to the multicast protocol message is finished in multicast protocol unit on the core board.
(7) multicast message transmitting element on the core board is finished the reconstruct of message, and calls physical layer interface and send.
Fig. 2 is user's plate multicast software Organization Chart.The multicast software framework of user's plate is the same with core board basically, and difference is: do not have directly interface on user's plate towards leading subscriber, all configurations all be by core board indirect reach user's plate.
Fig. 3 is system parameters configuration flow figure.The system parameters layoutprocedure comprises step:
(1) public module order preliminary treatment and Dispatching Unit receive configuration order on the core board, carry out preliminary treatment and distribution.
(2) the command process interface unit receives order on the core board, analyzes order, the decision processing mode.
(3), then send to ordered multicast Processing Interface on user's plate, then by the command processing module read/write multicast packet collection of the multicast inside on user's plate by the communication between plates interface if the data on user's plate.
(4) safeguard global data if desired, then need to call the multicast packet collection of the internal command processing module read/write overall situation on the core board.
Fig. 4 is IGMP (IGMP) inquiry packet process chart.
The igmp querying message normally multicast path by or agent equipment send, be used for inquiry and whether exist arbitrarily or the particular group member.The user board port of DSLAM equipment is the end user of multicast service normally, so do not deal with and transmit for the igmp querying message that receives from user board port.Comprise:
(a) source port on the core board receive by multicast path by or the query message that sends over of agent equipment after, by the protocol processing unit of core board query message is handled, and is transmitted it to other source ports;
(b) core board is transmitted to inline mouthful between user's plate and the core board with query message;
(c) user's plate enters protocol processing unit after receiving the query message of sending from core board;
(d) user's plate is forwarded to receiving port in the multicast virtual local area network with query message, arrives user's multi-cast terminal equipment.
Fig. 5 is that IGMP asks to join message process chart.DSLAM comprises step to the processing that request joins message:
(A1) after the port on user's plate receives that the request that is sended over by multi-cast terminal equipment joins message, carry out scope check, and produce the call statistics record as required, be reported to network management system; If authority is " refusal ", then with packet loss; If " preview " then enters the preview control unit and handles, change step (A2) then over to; If " permission " then changes step (A2) over to;
(A2) protocol processing unit of user's plate joins message to request and handles, and the interface that calls exchange chip as required and provide is write hardware forwarding table;
(A3) the multicast management unit of user's plate joins message IGMP and is transmitted to inline mouthful between user's plate and the core board;
(A4) receive on the core board that the request that is sended over by user's plate joins message;
(A5) core board carries out scope check, if authority is " refusal ", then with packet loss; If " preview " then enters the preview control unit and handle, change step (A7) then over to; If " permission " then changes step (A7) over to;
(A6) protocol processing unit of core board joins message to request and handles, and the interface that calls exchange chip as required and provide is write hardware forwarding table;
(A7) the multicast management unit of core board joins message request and is transmitted to the upper united mouth.
Fig. 6 is an IGMP request leave message process chart.DSLAM comprises step to the processing of request leave message:
(B1) port on user's plate is received the request leave message that is sended over by multi-cast terminal equipment, and by protocol processing unit the request leave message is handled;
(B2) interface that the multicast management unit calls exchange chip as required and provides on user's plate is write hardware forwarding table;
(B3) user's plate carries out scope check, produces the call statistics record as required, is reported to network management system;
(B4) the multicast management unit of user's plate will ask leave message to be transmitted to inline mouthful between user's plate and the core board;
(B5) receive on the core board after the request leave message that sends over by user's plate and the request leave message is handled by protocol processing unit;
(B6) interface that the multicast management unit calls exchange chip as required and provides on the core board is write hardware forwarding table, will ask leave message to be transmitted to the upper united mouth.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those skilled in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (6)
1. the distributed implementation method of a L 2 multicast function is characterized in that: comprises,
(1) core board carries out preliminary treatment and distribution according to configuration order to data, and decision is to the processing mode of data;
(2) if data are global data, then data are handled by core board;
(3) if data are the data on user's plate, then data are handled by user's plate;
Wherein, the middle core board of described step (2) is handled data and is comprised command process; Command process on the described core board is specially:
(21) common unit on the core board is configured the preliminary treatment and the distribution of order;
(22) the external command process interface unit in the multicast unit on the core board receives the configuration order and the processing of common unit distribution;
(23) by the processing unit on the core board each configuration order and configuration data are handled, and multicast protocol is handled the data set that need use safeguard;
(24) by the communication between plates unit on the core board configuration data is sent to user's plate;
User's plate is handled data and is comprised command process in the described step (3); Command process on described user's plate is specially:
(31) configuration data that on the communication between plates unit receives by core board, transmits of user's plate;
(32) configuration order of communication unit distribution and processing between the command process interface unit dash receiver on user's plate;
(33) by the processing unit on user's plate each configuration order and configuration data are handled, and multicast protocol is handled the data set that need use safeguard.
2. the distributed implementation method of a kind of L 2 multicast function according to claim 1 is characterized in that: the multicast process that is respectively equipped with the multicast protocol processing of being responsible on core board and the user's plate on core board and the user's plate.
3. the distributed implementation method of a kind of L 2 multicast function according to claim 1 is characterized in that: core board is handled data and is comprised command process and protocol processes in the described step (2).
4. the distributed implementation method of a kind of L 2 multicast function according to claim 3, it is characterized in that: the protocol processes on the described core board is specially:
(211) the reception message unit of core board carries out preliminary treatment to message;
(212) the user authority management unit on the core board carries out scope check, if authority is for refusal, then with packet loss; If authority is preview, then after handling, the preview control unit carries out the processing of multicast protocol message by protocol process module; If authority is then carried out the processing of multicast protocol message for allowing by protocol process module;
(213) information of the multicast management unit maintenance management group of core board;
(214) the multicast message transmitting element on the core board is finished the reconstruct to message, and message is sent.
5. the distributed implementation method of a kind of L 2 multicast function according to claim 1 is characterized in that: user's plate is handled data and is also comprised protocol processes in the described step (3).
6. the distributed implementation method of a kind of L 2 multicast function according to claim 5, it is characterized in that: the protocol processes on described user's plate is specially:
(311) the reception message unit of user's plate carries out preliminary treatment to message;
(312) the user authority management unit on user's plate carries out scope check, if authority is for refusal, then with packet loss; If authority is preview, then after handling, the preview control unit carries out the processing of multicast protocol message by protocol process module; If authority is then carried out the processing of multicast protocol message for allowing by protocol process module;
(313) information of the multicast management unit maintenance management group of user's plate;
(314) the multicast message transmitting element on user's plate is finished the reconstruct to message, and message is sent.
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| CN102611606A (en) * | 2011-01-21 | 2012-07-25 | 中兴通讯股份有限公司 | Method and device for separating multicast service |
| CN102217240B (en) | 2011-05-18 | 2014-02-19 | 华为技术有限公司 | Vector DSL method, system, single board and a dslam device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2503681Y (en) * | 2001-11-01 | 2002-07-31 | 杭州亿利通信器材有限公司 | Digital group telephone |
| CN1610303A (en) * | 2004-11-02 | 2005-04-27 | 港湾网络有限公司 | Realizing method for hardware of paralle high-speed group transmitting channel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2503681Y (en) * | 2001-11-01 | 2002-07-31 | 杭州亿利通信器材有限公司 | Digital group telephone |
| CN1610303A (en) * | 2004-11-02 | 2005-04-27 | 港湾网络有限公司 | Realizing method for hardware of paralle high-speed group transmitting channel |
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