CN1172484C - Method for wide band switch-on apparatus supporting of Ethernet load point-to-point protocol - Google Patents

Abstract

The present invention relates to a method for supporting an Ethernet load point-to-point protocol by a wide band switch-on apparatus. In the method, a supporting module for the Ethernet load point-to-point protocol is arranged on a user line service board and is embedded into a special integrated circuit for the second layer protocol adapting module of the wide band switch-on apparatus so as to realize the support of the protocol. In the present invention, the module for the protocol is arranged on the user line service board to be realized, and therefore, the module only processes data on the user line service board. The number of the processed users is a constant which is a smaller number; thus, the present invention can support multicast and guarantee stable performance, and simultaneously, a rather complicated design is avoided.

Description

Broadband access equipment is supported the method for Ethernet bearing point-to-point protocol

Affiliated technical field:

The invention provides a kind of method so that on broadband access equipment, support embedded Ethernet bearing point-to-point protocol (Point-to-Point Protocol over Ethernet is abbreviated as PPPOE).

Background technology:

At present, broadband access technology comprises Digital Subscriber Line xDSL (Digital Subscriber Line), Hybrid Fiber Coaxial HFC (Hybrid Fiber Coaxial) etc.The XDSL technology comprises ADSL (Asymmetric Digital Subscriber Line) ADSL (Asymmetric Digital Subscriber Line) again, very-high-data-rate digital subscriber l VDSL (Very-high-data-rate Digital Subscriber Line), high data rate digital subscriber line HDSL (High-data-rate Digital Subscriber Line), single copper stranded conductor high-speed digital subscriber line SHDSL (Single-line High bit-rate Digital Subscriber Line) etc.

When carrying out broadband access technology access user, most popular two-layer protocol is Ethernet bearing point-to-point protocol PPPOE.Support to PPPOE at present has two kinds of main forms: a kind of is to have a proprietary BAS Broadband Access Server BAS (Broadband Access Server) equipment that the support that provides PPPOE is provided with broadband access equipment, is called big BAS pattern; Another kind be on broadband access equipment separately BAS integrated circuit board of exploitation support to PPPOE is provided, be called little BAS pattern.These two kinds of patterns in fact all are a kind of freestanding PPPOE support modes.Because the number of users of its support is all huger, exist along with number of users increases equipment performance and reduce even not endurable shortcoming gradually, and, make freestanding PPPOE support mode to carry out good support to three layers of multicast service because number of users is many.Freestanding solution makes operator need carry out extra hardware investment outside broadband access equipment, and because the number of users of supporting is huge, adopt very complicated technology, caused these two kinds to support that the additional hardware investment price of PPPOE pattern is high.

Goal of the invention:

The support of the PPPOE that the objective of the invention is on broadband access equipment, to provide embedded.By embedded support PPPOE, the PPPOE that can finish broadband access equipment under the situation that does not increase or increase a little hardware cost inserts, and can not reduce performance because of the increase of number of users; Because be embedded equipment, making to run to increase extra hardware investment; And embedded PPPOE pattern can provide the good support to three layers of multicast service.

The technical scheme of invention:

The present invention is implemented in the method for supporting PPPOE on the broadband access equipment, and its technical scheme is as follows:

Broadband access equipment generally is divided into broadband interface user interface business board, backboard, master control borad: wherein, master control borad generally comprises exchcange core module, master control CPU module, upstream Interface module; Backboard is finished being connected of master control borad and user interface business board; The user interface business board comprises subscriber's line data modem module and two-layer protocol adaptation module.

The function of each module of traditional broadband access equipment is:

(1) subscriber's line data modem module is finished the D/A switch process of subscriber's line data;

(2) the two-layer protocol adaptation module is finished the adaption function of the two-layer protocol of subscriber's line to the exchcange core two-layer protocol;

(3) rear panel module connects two-layer protocol adaptation module and exchcange core module;

(4) layer exchcange core module is finished the exchange of two-layer protocol adaptation module message to the message of upstream Interface;

(5) the upstream Interface module provides the interface to higher level equipment;

(6) master control CPU module is finished the control of equipment and the processing of partly controlling message.

The present invention revises the two-layer protocol adaptation module on the user interface business board, in its application-specific integrated circuit (ASIC) module, embed support to the Ethernet bearing point-to-point protocol, enable to handle the PPPOE message and support multicast service on the PPPOE, thereby form Ethernet bearing point-to-point protocol support module.Claim that amended module is the PPPOE module, it is divided into the input of subscriber's line data, the input of exchcange core data, three aspect explanations of master control central processing unit data input to the concrete processing procedure of PPPOE message.The input of these three aspects is called up input, descending input, control input.Specify as follows:

For up input:

(1) Ethernet bearing point-to-point protocol module at first is adapted for the Ethernet protocol message with the two-layer protocol message of subscriber's line, when distinguishing user port for behind this protocol port, find that then message is an Ethernet bearing point-to-point protocol message, resolves according to agreement message;

(2) if agreement control message does not add conversion with message and sends to the master control CPU module, handle by the master control CPU module;

(3) if the protocol service message is finished the adaptive of Ethernet protocol message and exchcange core two-layer protocol message, the message after adaptive is sent to exchcange core by backboard.

For descending input:

(1) judges whether it is the message that is sent to Ethernet bearing point-to-point protocol user port;

(2) if, judge whether to be multicast message, if not multicast message, then jump to (4) step;

(3) seek the user port that needs carry out multicast according to the multicast address in the message, need the user port of multicast to transmit all;

(4) finish the adaptive of exchcange core two-layer protocol message and Ethernet protocol message, finish the adaptive of Ethernet protocol message and subscriber's line two-layer protocol, message is transmitted to the subscriber's line processing module.

Import for control:

(1) judges whether to be Ethernet bearing point-to-point protocol message;

(2) if, finish the adaptive of Ethernet message and subscriber's line two-layer protocol, be transmitted to the subscriber's line processing module; If not, then abandon this message.

The present invention has been put into the PPPOE module on the subscriber's line business board and has realized, by the application-specific integrated circuit (ASIC) of its embedding broadband access equipment two-layer protocol adaptation module being realized support to this agreement, thereby make data on just customer service plate of PPPOE resume module, the number of users of handling is a definite value, and number is less, generally, can carry out multicast support and guaranteed performance and stablize, avoid too complicated design simultaneously below 48 the tunnel.And freestanding BAS causes it when number of users is many decreased performance can take place because will handle huge number of users in a module, can't provide good support to multicast simultaneously, also because the huge feasible design of number of users of its access is very complicated.

Embedded PPPOE scheme of the present invention has made full use of application-specific integrated circuit ASIC (the Application Specific Integrated Circuit) surplus resources of the two-layer protocol adaptation module of broadband access equipment and the surplus resources of master control central processing unit simultaneously, this just utilization to surplus resources causes the whole cost of this embedded support PPPOE can or small raising only not arranged than existing broadband access equipment raising.Beneficial effect:

Adopt technical scheme of the present invention can greatly reduce the equipment investment of Virtual network operator, and can improve the performance of overall network, the support to multicast service is provided simultaneously the broadband access solution.

The Figure of description explanation:

Fig. 1 supports the broadband access equipment system block diagram of embedded PPPOE

Fig. 2 PPPOE resume module user data upstream data flow process figure

Fig. 3 PPPOE resume module exchcange core downlink data flow process figure

Embodiment:

According to technical scheme of the present invention, the Hammer 10000 IP DSLAM systems with Harbor Network company are example below, specify embodiments of the present invention:

The block diagram of this system as shown in Figure 1, wherein:

A: subscriber's line access service plate;

I: backboard;

L: master control borad;

B: master control central processing unit control messages;

C: subscriber's line;

D: subscriber's line modulation module;

E: subscriber's line two-layer protocol message;

F: the subscriber's line two-layer protocol is to the Ethernet protocol adaptation module;

G: Ethernet protocol message;

H:PPPOE processing and Ethernet protocol are to exchcange core protocol adaptation module;

K: exchcange core physical layer protocol bus;

J: master control central processing unit control bus;

M: master control central processing unit;

N: exchcange core;

O: exchcange core protocol massages;

P: the exchcange core protocol massages is to upstream Interface protocol massages adaptation module;

Q: uplink.

The ADU business board of Hammer 10000 provides the PPPOE that ADSL user is inserted to support.User's PC is connected with the ADU business board of Hammer 10000 by ADSL modem, and the client software of PPPOE has been installed.

Configuration is supported the PPPOE that carries out of user port on the control desk of Hammer 10000, and configures two or three layers of exchcange core related data, configures the uplink service mouth, and the uplink service mouth is connected with Internet, RadiusServer.

The user at first starts the PPPOE dialing procedure, after the PPPOE module identification of ADU business board goes out PPPOE control message, the control message is mail to the master control CPU module of master control borad.Master control central processing unit and user's PPPOE client, Radius Server carry out finishing authentification of user alternately, and note is taken.Utilize PPPOE ASIC modules driver module to be provided with and allow the user to insert.

The user begins to visit Internet, and the PPPOE module is handled the user's data bag in this process, and three layers of multicast tenability are provided.

The user sends the PPPOE control message of the request of disconnection, and the PPPOE module mails to the master control CPU module with this control message, and master control central processing unit and user's PPPOE client, Radius Server carry out alternately, finishes user offline, remembers that expense finishes.Utilize the setting of PPPOE ASIC modules driver module to forbid that the user inserts.

In this system, PPPOE resume module user data upstream data flow process as shown in Figure 2; Processing and exchanging core downlink data flow process figure as shown in Figure 3.

Claims (4)

1. a broadband access equipment is supported the method for Ethernet bearing point-to-point protocol, comprise the hardware and software part, hardware comprises broadband interface user interface business board, backboard, three parts of master control borad, it is characterized in that: broadband access equipment two-layer protocol adaptation module is made amendment, in its application-specific integrated circuit (ASIC) module, embed support, form Ethernet bearing point-to-point protocol support module the Ethernet bearing point-to-point protocol; This support is handled and is realized by up input, descending input, these three kinds of inputs of control input are carried out message according to agreement respectively; This Ethernet bearing point-to-point protocol support module is put on the subscriber's line business board, by the application-specific integrated circuit (ASIC) of its embedding broadband access equipment two-layer protocol adaptation module being realized the support to this agreement, this agreement support module is only handled the data on the customer service plate.

2. broadband access equipment according to claim 1 is supported the method for Ethernet bearing point-to-point protocol, it is characterized in that: the Ethernet bearing point-to-point protocol support module that embeds two-layer protocol adaptation module application-specific integrated circuit (ASIC) carries out following message to up input according to agreement to be handled:

(1) Ethernet bearing point-to-point protocol software-driven module at first is adapted for the Ethernet protocol message with the two-layer protocol message of subscriber's line, when distinguishing user port for behind this protocol port, find that then message is an Ethernet bearing point-to-point protocol message, resolves according to agreement message;

(2) if agreement control message does not add conversion with message and sends to the master control CPU module, handle by the master control CPU module;

(3) if the protocol service message is finished the adaptive of Ethernet protocol message and exchcange core two-layer protocol message, the message after adaptive is sent to exchcange core by backboard.

3. broadband access equipment according to claim 1 is supported the method for Ethernet bearing point-to-point protocol, it is characterized in that: the Ethernet bearing point-to-point protocol support module that embeds two-layer protocol adaptation module application-specific integrated circuit (ASIC) carries out following message to descending input according to agreement to be handled:

(1) judges whether it is the message that is sent to Ethernet bearing point-to-point protocol user port;

(2) if, judge whether to be multicast message, if not multicast message, then jump to (4) step;

(3) seek the user port that needs carry out multicast according to the multicast address in the message, need the user port of multicast to transmit all;

(4) finish the adaptive of exchcange core two-layer protocol message and Ethernet protocol message, finish the adaptive of Ethernet protocol message and subscriber's line two-layer protocol, message is transmitted to the subscriber's line processing module.

4. broadband access equipment according to claim 1 is supported the method for Ethernet bearing point-to-point protocol, it is characterized in that: the Ethernet bearing point-to-point protocol support module that embeds two-layer protocol adaptation module application-specific integrated circuit (ASIC) carries out following message to the control input according to agreement to be handled:

(1) judges whether to be Ethernet bearing point-to-point protocol message;

(2) if, finish the adaptive of Ethernet message and subscriber's line two-layer protocol, be transmitted to the subscriber's line processing module; If not, then abandon this message.

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