CN1430392B

CN1430392B - Method of realizing group broadcasting hased on multi-connection

Info

Publication number: CN1430392B
Application number: CN 01138102
Authority: CN
Inventors: 于学鸿; 李桂平; 孙砚峰
Original assignee: ZTE Corp
Current assignee: CHINA TECHNOLOGY EXCHANGE CO., LTD.; State Grid Beijing Electric Power Co Ltd; State Grid Economic and Technological Research Institute
Priority date: 2001-12-29
Filing date: 2001-12-29
Publication date: 2010-05-05
Anticipated expiration: 2021-12-29
Also published as: CN1430392A

Abstract

A multicast realization method based on multiple objective connection includes at least the following operations; setting up multicast source; adding multicast member; cancelling leaf group member; cancelling multicast group. The present invention can save the multicast router required in realization of multicast service by applying small capacity of tandem equipment so that the hardware cost of entire system can be reduced but the performance of entire system can be raised.

Description

Method of realizing group broadcasting based on many orders connections

Technical field:

The present invention relates to a kind of implementation method of broadband access multicast of data communication communication field, relate in particular to the method for realizing group broadcasting based on many orders connections of the BAS Broadband Access Server product of data communication communication field, also be applicable to that other adopts the same manner to carry out the data communication products of Route Selection simultaneously.

Background technology:

Along with the development of broadband network, the user sharply increases and disperses.Telecom operators more and more feel needs a user management center of concentrating relatively to come the user who disperses is managed concentratedly and charges.Wideband network access server arises at the historic moment.One of topmost characteristics of wideband network access server can realize multiple new business exactly, and multicast is exactly wherein important a kind of, and using as data conference system, TV multi-cast system, long-distance educational system or the like all needs to realize multicast protocol.

The multicast of general broadband ethernet is to adopt common Ethernet multicast address to realize, rather than adopts the method that connects based on many orders; The method that connects based on many orders then is applicable to the multiple network framework, realizes multicast in multilayer; Help hardware simultaneously and realize linear speed processed group unicast packets.

Referring to Fig. 1, monocular connects an oriented line that is meant from source end A to terminal B and is called a monocular connection, and be characterized in: the data flow of coming in from source end A will flow to terminal B.Monocular is connected with unique source end A, with unique terminal B.

Referring to Fig. 2, many orders connect be exactly from A point to B, C, D ..., the connection formed of a plurality of directed line segments of a plurality of purposes such as N we be referred to as many orders connections.The A point is called the source end, B, C, D ..., the N point is destination.Many orders are connected with a unique source end, and a plurality of destinations are arranged.Connection (as the connection of A to B) during many orders connect is called the leaf connection that these many orders connect.Many orders connection characteristics is: the data flow of coming in from the A point can flow to simultaneously B, C, D ..., the N destination.Many orders connect the transmission data to be realized by hardware, does not need to carry out the copy of data, therefore can improve data transfer rate greatly, can reduce the complexity of software, saves memory space simultaneously.

But general tandem equipment will be realized multicast functionality, and corresponding multicast router need be set in system, and the setting of multicast router or increase, can improve the complexity and the hardware cost of whole system undoubtedly.

Summary of the invention:

Main purpose of the present invention provides a kind of method of realizing group broadcasting that connects based on many orders, should utilize a plurality of many orders to connect based on the multicast implementation of many orders connected system and realize multicast, the multicast router of saving general tandem equipment realization multicast and needing, the complexity and the hardware cost of reduction whole system.

The object of the present invention is achieved like this:

A kind of method of realizing group broadcasting that connects based on many orders which comprises at least following operation: create multicast group; Increase multicast member: this user is added multicast group, if the original not member of this multicast group of this user place port then creates connection; Deletion multicast member: the user is deleted from this multicast member, if this user place port other member of this multicast group then delete connection not; Deletion belongs to all connections of this group, deletes this multicast group.

The concrete steps of above-mentioned increase multicast member are:

Step 1: when user side has a user 1 to add this multicast group, establishment from this user's 1 place port to network side interface (Net-side Network Interface, be called for short NNI) of side ports connects X, create again one from the NNI side ports to the user one of 1 place port connects Y;

Step 2: when the user 2 of the port at non-user 1 place also added this multicast group, the order of creating from user's 2 place ports to the NNI side ports, from user's 2 place ports to user's 1 place port more than connected C; Also to connect simultaneously and add a leaf on the X and connect from user's 1 place port to user's 2 place ports at many orders, many orders connect add on the Y one from the NNI side ports to the user 2 leaf connects.

When having new user, other adds multicast group from new port, and when this new port does not also have the user of this multicast group, create of more than one the order connection of this new port, add all in the many orders that are derived from other ports connect that simultaneously a leaf to this new port connects to this other port of multicast group.

The concrete steps of above-mentioned deletion multicast member are:

When a multicast member left this group, at first, deletion was derived from the port and connects to other member place interface and the many orders of network side interface; Delete of the leaf connection of other interface of this group simultaneously to the port.

Method of the present invention can be saved and be adopted the multicast router of low capacity tandem equipment for realizing that multicast service needs, thereby has reduced the hardware complexity and the cost of whole system; Improved the performance of whole system.

Description of drawings:

The schematic diagram that Fig. 1 connects for monocular.

Fig. 2 is the schematic diagram that many orders connect.

The multi-cast system structural representation that Fig. 3 connects and composes for many orders.

Fig. 4 connects and composes the flow chart that multi-cast system increases a user for many orders.

Fig. 5 connects and composes a user's of multi-cast system deletion flow chart for many orders.

Embodiment:

Referring to Fig. 2, many orders connect be exactly from A point to B, C, D ..., the connection formed of a plurality of directed line segments of a plurality of purposes such as N we be referred to as many orders connections.The A point is called the source end, B, C, D ..., the N point is destination.Many orders are connected with a unique source end, and a plurality of destinations are arranged.Connection (as the connection of A to B) during many orders connect is called the leaf connection that these many orders connect.

Referring to Fig. 3, the multi-cast system that many orders of the present invention connect and compose is exactly to set up one from the member place port of each participation multicast to lead to many orders connections that this organizes all other member place ports, and what ports are this group have, and just have what many orders to connect; The data of coming in from any one member of multicast will be by being that many orders of source end connect and are sent to this and organize other all members with this port.

Concrete operation is as follows: at first, set up a multicast source;

Referring to Fig. 4, when will adding this group, user 1 creates from user 1 place port UNI1 (User-Network Interface, User Network Interface) to the connection of NNI side ports NNI4, creates the connection of the 1 place port UNI1 from NNI side ports NNI4 to the user again.

When the user 2 of another port (the port UNI2 at non-user 1 place) also added this group, many orders of creating from user 2 place port UNI2 to NNI side ports NNI4, from user 2 place port UNI2 to user 1 place port UNI1 connected; Also to be connected with many orders of NNI side ports NNI4 simultaneously and add a leaf and connect, be connected with many orders of user 1 at NNI side ports NNI4 and add a leaf connection of 2 from the NNI side ports to the user from user 1 place port UNI1 to user 2 place port UNI2 user 1.

When other has new user from new port N (this port does not also have the user of this multicast group) when adding to come in, create the many orders connections of this port N, add all in the many orders that are derived from other port connect that simultaneously a leaf to this new port connects to other port of this group.

Referring to Fig. 5, work as multicast member, for example: the user 2, when leaving this group, judge that at first user 2 place port UNI2 have or not other this multicast user, if having then directly delete this user 2 backs and just finish; Otherwise, deletion from user 2 place port UNI2 to other this group user according to the many orders connections of port; The many orders of other of this group connect all deletes this user place port leaf connection.

In the time will deleting a multicast group, at first to delete all many orders that belong to this multicast group and connect, could delete the multicast group that belongs to this group then.

On concrete access server, when receiving packet, check at first whether this packet is the multicast protocol bag; Just mail to master control borad in this way, handle by protocol stack; Multicast packet is then found the corresponding many orders connections of this group in the port by purpose group address (group destination address) in this way, connects the group membership who is sent to other from these many orders; If this packet is other agreement controlling packet or packet, then adopt general handling process to handle this packet.

It should be noted last that: above embodiment is the unrestricted technical scheme of the present invention in order to explanation only, although the present invention is had been described in detail with reference to the foregoing description, those of ordinary skill in the art is to be understood that: still can make amendment or be equal to replacement the present invention, and not breaking away from any modification or partial replacement of the spirit and scope of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.

Claims

1. method of realizing group broadcasting that connects based on many orders is characterized in that: which comprises at least following operation:

Create multicast group;

Increase multicast member: the user is added multicast group, if the original not member of this multicast group of this user place port then creates connection;

Deletion multicast member: the user is deleted from this multicast member, if this user place port other member of this multicast group then delete connection not;

Deletion belongs to all connections of this group, deletes this multicast group.

2. the method for realizing group broadcasting that connects based on many orders according to claim 1 is characterized in that: the concrete steps that increase multicast member are:

Step 1: when user side had a user 1 to add this multicast group, one that creates from this user's 1 place port to the NNI side ports connected X, create again one from the NNI side ports to the user one of 1 place port connects Y;

3. the method for realizing group broadcasting that connects based on many orders according to claim 2, it is characterized in that: add multicast group from new port when other has new user, and when this new port does not also have the user of this multicast group, create of more than one the order connection of this new port, add all in the many orders that are derived from other ports connect that simultaneously a leaf to this new port connects to this other port of multicast group.

4. the method for realizing group broadcasting that connects based on many orders according to claim 1 is characterized in that: the concrete steps of deletion multicast member are: