CN101547110A

CN101547110A - Method, system and device for registering multicast source

Info

Publication number: CN101547110A
Application number: CN200910136766A
Authority: CN
Inventors: 王伟
Original assignee: Hangzhou H3C Technologies Co Ltd
Current assignee: Hangzhou H3C Technologies Co Ltd
Priority date: 2009-05-14
Filing date: 2009-05-14
Publication date: 2009-09-30

Abstract

The present invention discloses a method, a system and a device for registering multicast source, wherein the method comprises the following steps: inquiring the identification information of at least two multicast sources in the multicast correspondence by a router assigned by the source side, wherein the identification information represents the style of registration message transmitted to a convergent point; when the identification information presents that the style of registration message transmitted to the convergent point is empty registration message, adding the multicast address information of multicast source corresponding to the identification message to the empty registration message by the router assigned by the source side; and transmitting the empty registration message to the convergent point by the router assigned by the source side. According to the invention, the bandwidth in the network is reduced and the stability of multicast service is increased through integrating the multicast address information set of a plurality of multicast sources in one registration stop message.

Description

A kind of register method of multicast source, system and equipment

Technical field

The present invention relates to communication technical field, particularly relate to a kind of register method, system and equipment of multicast source.

Background technology

Along with carrying out of Network, multicast service more and more is subjected to using widely on network, as the communication mode arranged side by side with broadcasting with clean culture, multicasting technology can solve the problem that single-point sends, multiple spot receives effectively, thereby realized of the efficient data transmission of network mid point, saved a large amount of network bandwidths, reduce offered load to multiple spot.Utilize multicasting technology that new value-added service is provided easily, comprise the information service that online live, Web TV, long-distance education, tele-medicine, network radio station, real-time video meeting etc. are had relatively high expectations to the real-time of bandwidth and data interaction.

Existing multicast generally adopts PIM (Protocol Independent Multicast, Protocol Independent Multicast) agreement, for large-scale multicast network, dispose PIM SM (Protocol IndependentMulticast-Sparse Mode, Protocol Independent Multicast-sparse mode) agreement is the most general, PIM-SM belongs to the multicast routing protocol of sparse mode, uses " drawing (Pull) pattern " to transmit multicast packet, is applicable to the big-and-middle-sized network that the multicast member distribution disperses relatively, scope is wider.

The basic principle of PIM-SM comprises: (1) PIM-SM hypothesis All hosts does not need receiving multicast data, only to clearly proposing to need the main frame of multicast packet to transmit, PIM-SM realizes that the core missions of multicast forwarding are structures and safeguard RPT (Rendezvous Point Tree, shared tree or sink tree), certain router is as public root node RP (Rendezvous Point in the RPT selection PIM territory, Rendezvous Point), multicast packet is transmitted to the recipient by RP along RPT; (2) router that connects the recipient sends to the RP of certain multicast group correspondence and joins message (Join Message), and this message is sent to RP by hop-by-hop, the path of process just formed the branch of RPT; (3) multicast source is if send multicast packet to certain multicast group, at first by multicast source DR (Designated Router, Designated Router) is responsible for registering to RP, (Register Message) sends to RP by mode of unicast logon message, SPT (Shortest Path Tree, shortest path tree) was set up in triggering after this message arrived RP, and multicast source is sent to RP to multicast packet along SPT afterwards, after multicast packet arrives RP, be replicated and send to the recipient along RPT.

In the prior art, multicast source DR is responsible for each multicast source and sends logon message to RP, and register, and RP serves specific multicast group, can filter logon message, in logon message, carry (S is when G) list item is filtered by RP (this RP does not provide service for the multicast source or the multicast group of carrying in this list item), RP can send stopped registration messages to this DR, to stop the registration process of this multicast packet; Or working as the recipient is no longer mail to certain multicast group by the RP reception data, RP sends stopped registration messages to multicast source DR; Or RP is when beginning to receive multicast packet from multicast source, and RP sends stopped registration messages to multicast source DR.After registration is finished, DR also will periodically send empty logon message for each multicast source to RP, inform the existence of RP multicast source.

Based on top analysis, there is following shortcoming in multicast source when registration at present:

After registration was finished, multicast source periodically sent empty logon message (acquiescence is that each multicast source sent once empty logon message in a minute) by the DR that directly links to each other to RP; When the number of multicast source increased, (for example, when the construction of safe city, each road camera is exactly one road multicast source) wasted the network bandwidth, reduced stability of network.Calculate with 16K (16*1024) multicast source, empty logon message will send 32K in one minute, be equivalent to the empty logon message that per second sends about 500, when follow-up multicast source continues to increase, the empty logon message of per second in network can be more, and empty logon message is handled in CPU, and the processing queue of CPU is limited, therefore the situation that empty logon message is lost can occur, cause the vibration of multicast service.

Summary of the invention

The invention provides a kind of register method, system and equipment of multicast source,, improve stability of network with conserve network bandwidth.

In order to achieve the above object, the present invention proposes a kind of register method of multicast source, be applied to comprise in the system of at least two multicast sources, the source Designated Router that is connected with described at least two multicast sources and convergent point, said method comprising the steps of:

The identification information of at least two multicast sources described in the described source Designated Router inquiry multicast corresponding relation, described identification information represents to send to described convergent point the type of logon message;

When described identification information represents that described source Designated Router adds the multicast address information of the multicast source of described identification information correspondence in the sky logon message to when the type of described convergent point transmission logon message is empty logon message;

Described source Designated Router sends to described convergent point with described empty logon message.

Preferably, before the identification information of at least two multicast sources, also comprise described in the described source Designated Router inquiry multicast corresponding relation:

Described source Designated Router will be transferred to described convergent point by SPT branch from the multicast packet of described at least two multicast sources;

When described convergent point received described multicast packet by SPT branch for the first time, described source Designated Router received first stopped registration messages from described convergent point, the multicast address information of carrying at least one multicast source in described first stopped registration messages.

Preferably, after first stopped registration messages of described source Designated Router reception from described convergent point, also comprise:

Described source Designated Router obtains the multicast address information of at least one multicast source in described first stopped registration messages;

The pairing identification information of described at least one multicast source of described source Designated Router is set to send to described convergent point the type of empty logon message.

Preferably, described source Designated Router sends to described empty logon message after the described convergent point, also comprises:

Described source Designated Router receives second stopped registration messages from described convergent point, and described second stopped registration messages is carried the multicast address information of at least one multicast source.

The invention allows for a kind of register method of multicast source, be applied to comprise in the system of at least two multicast sources, the source Designated Router that is connected with described at least two multicast sources and convergent point, said method comprising the steps of:

The identification information of at least two multicast sources described in the described convergent point inquiry multicast corresponding relation, described identification information represents to send to described source Designated Router the type of logon message;

When described identification information represents that described convergent point adds the multicast address information of the multicast source of described identification information correspondence in second stopped registration messages to when the type of described source Designated Router transmission logon message is stopped registration messages;

Described convergent point sends to described source Designated Router with described second stopped registration messages.

Preferably, before the identification information of at least two multicast sources, also comprise described in the described convergent point inquiry multicast corresponding relation:

Described convergent point receives the empty logon message from described source Designated Router, the multicast address information of carrying at least one multicast source in the described empty logon message;

Described convergent point obtains the multicast address information of at least one multicast source in the described empty logon message;

The pairing identification information of described at least one multicast source of described convergent point is set to send to described source Designated Router the type of stopped registration messages.

Preferably, also comprise recipient and the recipient's side Designated Router that is connected with described recipient in the system that described method is used, it is characterized in that, before the empty logon message of described convergent point reception from described source Designated Router, also comprise:

When described convergent point receives the multicast packet of described at least two multicast sources by SPT branch, described convergent point is given described recipient's side Designated Router with described muticast data transmission, gives described recipient by described recipient's side Designated Router with described muticast data transmission; And judge that whether described multicast packet is the multicast packet of described at least two multicast sources of receiving by SPT branch for the first time;

When judged result when being, described convergent point adds the multicast address information of described two multicast sources in first stopped registration messages at least;

Described convergent point sends to described source Designated Router with described first stopped registration messages.

The present invention proposes a kind of Accreditation System of multicast source, comprise at least two multicast sources, the source Designated Router and the convergent point that are connected with described at least two multicast sources, wherein:

Described source Designated Router is used to inquire about the identification information of at least two multicast sources described in the first multicast corresponding relation, and described identification information represents to send to described convergent point the type of logon message; When described identification information is represented when the type that described convergent point sends logon message is empty logon message, the multicast address information of the multicast source of described identification information correspondence is added in the sky logon message; And described empty logon message sent to described convergent point;

Described convergent point is used for the identification information of the described multicast source of multicast address information setting of the multicast source that carries according to described empty logon message, and described identification information represents to send to described source Designated Router the type of logon message; Inquire about the identification information in the second multicast corresponding relation, when described identification information is represented when the type that described source Designated Router sends logon message is stopped registration messages, the multicast address information of the multicast source of described identification information correspondence is added in the stopped registration messages; And described second stopped registration messages sent to described source Designated Router.

The present invention proposes a kind of device registration of multicast source, be applied to comprise in the system of at least two multicast sources, the source Designated Router that is connected with described at least two multicast sources and convergent point, the device registration of described multicast source is as described source Designated Router, and described source Designated Router comprises:

Enquiry module is used to inquire about the identification information of at least two multicast sources described in the multicast corresponding relation, and described identification information represents to send to described convergent point the type of logon message;

Add module, electrically connect with described enquiry module, be used for Query Result when described enquiry module and be described identification information and represent when the type that described convergent point sends logon message is empty logon message, the multicast address information of the multicast source of described identification information correspondence is added in the sky logon message;

Sending module electrically connects with described interpolation module, is used for the empty logon message after the described interpolation module interpolation is sent to described convergent point.

Preferably, also comprise:

Transport module is used for the multicast packet from described at least two multicast sources is transferred to described convergent point by SPT branch;

Receiver module is used for receiving first stopped registration messages from described convergent point, the multicast address information of carrying at least one multicast source in described first stopped registration messages when described convergent point receives described multicast packet by SPT branch for the first time.

Preferably, also comprise:

Acquisition module electrically connects with described receiver module, is used for obtaining according to first stopped registration messages that described receiver module receives the multicast address information of at least one multicast source of described first stopped registration messages;

Module is set, electrically connects with described acquisition module, the pairing identification information of at least one multicast source that is used for described acquisition module acquisition is set to send to described convergent point the type of empty logon message.

Preferably, described receiver module also is used for: receive second stopped registration messages from described convergent point, described second stopped registration messages is carried the multicast address information of at least one multicast source.

The present invention proposes a kind of device registration of multicast source, be applied to comprise in the system of at least two multicast sources, the source Designated Router that is connected with described at least two multicast sources and convergent point, the device registration of described multicast source is as described convergent point, and described convergent point comprises:

Enquiry module is used to inquire about the identification information of at least two multicast sources described in the multicast corresponding relation, and described identification information represents to send to described source Designated Router the type of logon message;

Add module, electrically connect with described enquiry module, be used for Query Result when described enquiry module and be described identification information and represent when the type that described source Designated Router sends logon message is stopped registration messages, the multicast address information of the multicast source of described identification information correspondence is added in second stopped registration messages;

Sending module electrically connects with described interpolation module, is used for second stopped registration messages after the described interpolation module interpolation is sent to described source Designated Router.

Preferably, also comprise:

Receiver module is used to receive the empty logon message from described source Designated Router, the multicast address information of carrying at least one multicast source in the described empty logon message;

Acquisition module electrically connects with described receiver module, is used for obtaining according to the empty logon message that described receiver module receives the multicast address information of at least one multicast source of described empty logon message;

Module is set, electrically connects with described acquisition module, the pairing identification information of at least one multicast source that is used for described acquisition module acquisition is set to send to described source Designated Router the type of stopped registration messages.

Preferably, also comprise recipient and the recipient's side Designated Router that is connected with described recipient in the system that described equipment is used, it is characterized in that, also comprise:

Transport module, be used for when described convergent point receives the multicast packet of described at least two multicast sources by SPT branch, give described recipient's side Designated Router with described muticast data transmission, give described recipient with described muticast data transmission by described recipient's side Designated Router; And judge that whether described multicast packet is the multicast packet of described at least two multicast sources of receiving by SPT branch for the first time;

Described interpolation module also is used for:

When the judged result of described transport module when being, the multicast address information of described at least two multicast sources is added in first stopped registration messages;

Described sending module also is used for:

Described first stopped registration messages is sent to described source Designated Router.

Compared with prior art, the present invention has the following advantages:

By at multicast source DR when RP sends empty logon message, multicast address information integration to an empty logon message with at least one multicast source, and at RP when multicast source DR sends stopped registration messages, on multicast address information integration to a stopped registration messages with at least one multicast source, thereby reduced the bandwidth in the network, and taken cpu resource seldom, improved the stability of multicast service, for more massive multicast source provides the foundation.

Description of drawings

In order to be illustrated more clearly in the present invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in the present invention or the description of the Prior Art below, apparently, accompanying drawing in describing below only is accompanying drawings more of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the multicast source process registration flow chart under a kind of application scenarios of the present invention's proposition;

Fig. 2 is the networking model figure of multicast source registration under a kind of application scenarios;

Fig. 3 is multicast source process registration flow chart under the another kind of application scenarios of the present invention's proposition;

The system construction drawing that Fig. 4 registers for a kind of multicast source that the present invention proposes;

The equipment structure chart that Fig. 5 registers for a kind of multicast source that the present invention proposes;

The equipment structure chart that Fig. 6 registers for the another kind of multicast source that the present invention proposes.

Embodiment

Below in conjunction with the accompanying drawing among the present invention, the technical scheme among the present invention is clearly and completely described, obviously, described only is a part of the present invention, rather than whole.Based on the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other invention that is obtained under the creative work prerequisite.

Core concept of the present invention is by expanding existing empty logon message and stopped registration messages, at multicast source DR when RP sends empty logon message, multicast address information integration to an empty logon message with at least one multicast source, and at RP when multicast source DR sends stopped registration messages, on multicast address information integration to a stopped registration messages with at least one multicast source, thereby reduced the bandwidth in the network, and taken cpu resource seldom, improved the stability of multicast service, for more massive multicast source provides the foundation.

The register method of a kind of multicast source that a kind of application scenarios of the present invention proposes down, be applied to comprise in the system of at least two multicast sources, the source Designated Router that is connected with described at least two multicast sources, convergent point, recipient and the recipient's side Designated Router that is connected with described recipient, as shown in Figure 1, said method comprising the steps of:

Step S101, described source Designated Router will be transferred to described convergent point by SPT branch from the multicast packet of described at least two multicast sources.

Step S102, when described convergent point receives the multicast packet of described at least two multicast sources by SPT branch, described convergent point is given described recipient's side Designated Router with described muticast data transmission, gives described recipient by described recipient's side Designated Router with described muticast data transmission; And judge that whether described multicast packet is the multicast packet of described at least two multicast sources of receiving by SPT branch for the first time.

Step S103, when judged result when being, described convergent point adds the multicast address information of described two multicast sources in first stopped registration messages at least; And described first stopped registration messages sent to described source Designated Router.

Wherein, convergent point is for each multicast packet that receives, obtain the information about multicast source of this multicast packet, when this multicast packet is this multicast source when sending to convergent point by SPT branch for the first time, convergent point adds the information of this multicast source in first stopped registration messages to; When the informational needs of a plurality of (at least one) multicast source added, convergent point added the information of at least one multicast source during same first registration stops to, and the information of this multicast source comprises the address information and the multicast address information of multicast source.

Step S104, described source Designated Router obtains the multicast address information of at least one multicast source in described first stopped registration messages.

When described convergent point receives described multicast packet by SPT branch for the first time, can send first stopped registration messages to the source Designated Router, at this moment, described source Designated Router will receive first stopped registration messages from described convergent point, carry the multicast address information of at least one multicast source in described first stopped registration messages.

After receiving this first stopped registration messages, the source Designated Router can obtain the multicast address information of at least one multicast source in described first stopped registration messages.

Step S105, the pairing identification information of described at least one multicast source of described source Designated Router is set to send to described convergent point the type of empty logon message.

Wherein, described identification information represents to send to described convergent point the type of logon message, comprise logon message and empty logon message, for example, identification information be set to represent in 1 o'clock logon message type be empty logon message, correspond among the present invention, promptly the pairing identification information of described at least one multicast source of source Designated Router is set to 1.

Step S106, the identification information of at least two multicast sources described in the described source Designated Router inquiry multicast corresponding relation; When described identification information represents that described source Designated Router adds the multicast address information of the multicast source of described identification information correspondence in the sky logon message to when the type of described convergent point transmission logon message is empty logon message.

Wherein, this multicast corresponding relation is that (this multicast corresponding relation comprises the corresponding relation of multicast source address information, multicast group address information and above-mentioned identification information for S, G) list item; The source Designated Router is by this identification information of inquiry, the type that acquisition sends logon message to described convergent point be empty logon message (for example, identification information is 1), the source Designated Router adds the multicast address information of the pairing multicast source of this identification information in the sky logon message to, because in the multicast corresponding relation the pairing type of at least one identification information being arranged is empty logon message, promptly the source Designated Router need add the multicast address information of a plurality of (at least one) multicast source in empty logon message.

Step S107, described source Designated Router sends to described convergent point with described empty logon message.

Step S108, described convergent point receives the empty logon message from described source Designated Router, the multicast address information of carrying at least one multicast source in the described empty logon message.

Step S109, described convergent point obtain the multicast address information of at least one multicast source in the described empty logon message, and the pairing identification information of described at least one multicast source is set to send to described source Designated Router the type of stopped registration messages.

Step S110, the identification information of at least two multicast sources described in the described convergent point inquiry multicast corresponding relation, described identification information represents to send to described source Designated Router the type of logon message; When described identification information represents that described convergent point adds the multicast address information of the multicast source of described identification information correspondence in second stopped registration messages to when the type of described source Designated Router transmission logon message is stopped registration messages.

Step S111, described convergent point sends to described source Designated Router with described second stopped registration messages, and described second stopped registration messages is carried the multicast address information of at least one multicast source.

Among the present invention, by at RP when multicast source DR sends stopped registration messages, on multicast address information integration to a stopped registration messages with a plurality of multicast sources, thereby reduced the bandwidth in the network, and taken cpu resource seldom, improved the stability of multicast service.

The register method of a kind of multicast source that the another kind of application scenarios of the present invention proposes down, this method is applicable to gives corresponding convergent point RP with the muticast data transmission of a plurality of multicast sources, and pass through this RP and give corresponding recipient muticast data transmission, networking model figure as shown in Figure 2, multicast source 1, multicast source 2 is connected with Designated Router DR 1 with multicast source 3, recipient 1 is connected with DR 2, recipient 2 is connected with DR 3, recipient 3 is connected with DR 4, wherein, all devices in the above-mentioned network is the multicast equipment of supporting three layers of multicast functionality, and this multicast equipment includes but not limited to multicast router, the three-tier switch system.For example, when this multicast equipment is multicast router, can use multicast router that the multicast routing function is provided.The register method of above-mentioned multicast source may further comprise the steps as shown in Figure 3:

Step S301, multicast source DR (DR 1) receives the multicast packet from a plurality of multicast sources.

Wherein, comprise a large amount of multicast sources in multicast network, the multicast source that is connected with DR 1 also has a plurality of (for example, having 100 multicast sources to be connected with DR 1), among the present invention, be that multicast source 1, multicast source 2 and multicast source 3 are that example describes with the multicast source that is connected with DR 1.

When a plurality of multicast sources when multicast group sends multicast packet, this multicast packet will send to the DR that is connected with multicast source earlier.

Step S302, DR 1 sends logon message by the mode of clean culture to RP, has encapsulated the multicast packet of multicast source in this logon message.

Receive the multicast packet of multicast source at DR 1 after, the multicast packet that sends to RP for the first time (for example is encapsulated into logon message, multicast source 1 is encapsulated into logon message 1, multicast source 2 is encapsulated into logon message 2, multicast source 3 is encapsulated into logon message 3 to the multicast packet that RP sends for the first time to the multicast packet that RP sends for the first time to the multicast packet that RP sends for the first time) in, and this logon message sent to RP.

Step S303, after RP is receiving this logon message, this logon message of decapsulation, and the multicast packet that will be encapsulated in this logon message is transmitted to recipient's side DR along RPT, and send to DR 1 direction hop-by-hop that (S G) joins message.

Wherein, the router of 1 process has formed the branch of SPT from RP to DR, the router of process generated in transmitting separately all that (SPT is a root with the DR (DR 1) of multicast source, is leaf with RP for S, G) list item.

Wherein, the building process of above-mentioned RPT is specially: all recipients of hypothesis (terminal) all do not need receiving multicast data earlier, RP is only to clearly proposing to need the recipient of multicast packet to transmit, thereby between recipient DR and RP, set up RPT, and safeguarding RPT by multicast network, RPT is transmitted to recipient by RP along RPT with multicast packet.For example, after receiving multicast packet, RP takes place multicast packet to DR 2 respectively by RPT, DR 3 and DR 4, and multicast packet is sent to recipient 1 by DR 2, and by DR 3 multicast packet is sent to recipient 2, by DR 4 multicast packet is sent to recipient 3.

Step S304, DR 1 is receiving from after the joining message of RP, and the multicast packet of multicast source is transferred to RP along the SPT that has set up.

Wherein, each router is after receiving multicast packet, according to (S, G) list item is searched the address information of multicast packet, and issues multicast packet to next redirect, thereby this multicast packet is sent to RP among the SPT.

When step S305, RP receive for the first time and be transferred to the multicast packet of RP by SPT, this multicast packet is transmitted to recipient's side DR along RPT, and the mode by clean culture is to DR 1 transmission stopped registration messages.

Wherein, RP will receive a plurality of multicast sources are transferred to RP by SPT multicast packet, this RP can be after whenever receiving a multicast packet, just the multicast source DR to this multicast packet correspondence sends a stopped registration messages, for example, RP is behind the multicast packet that receives multicast source 1, DR 1 to this multicast source 1 sends stopped registration messages, receiving the multicast packet of multicast source 2 as RP after, DR 1 to this multicast source 2 sends stopped registration messages, RP is behind the multicast packet that receives multicast source 3, DR 1 to this multicast source 3 sends stopped registration messages, sending stopped registration messages with RP to the DR 1 of multicast source 1 is that example describes, and this stopped registration messages is following form.

0 1 2 3

0?1?2?3?4?5?6?7?8?9?0?1?2?3?4?5?6?7?8?9?0?1?2?3?4?5?6?7?8?9?0?1

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

| Group?Address(Encoded-Group?format) |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

| Source?Address(Encoded-Unicast?format) |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Wherein, this PIM Ver be version number (for example, PIM 1.0 versions), this Type be this stopped registration messages type (for example, the HELLO message), the type field of this Reserved for reserving, this Checksum be verification and, this verification and be for logon message integrality in transmittance process is considered, by disposing that whole message comes calculation check and (for still less data of encapsulation in stopped registration messages, and consider interoperability, need come according to the full content in the logon message calculation check and).This GroupAddress is a multicast group address information, this Source Address is the address information of multicast source (multicast source 1), after DR 1 receives this stopped registration messages, can from this stopped registration messages, get access to the address information of the multicast source 1 that carries in this stopped registration messages, stop registration process for the multicast packet of this multicast source 1.

Among the present invention, when RP is transferred to the multicast packet of RP at a plurality of multicast sources of reception by SPT, this RP (for example can also preset a time cycle, this time cycle is preset as 20 seconds), after arriving this default time cycle, the pairing multicast source of all multicast packets DR that RP received in the default time cycle sends a stopped registration messages, for example, RP received from multicast source 1 in the default time cycle (20 seconds), behind the multicast packet of multicast source 2 and multicast source 3, RP sends stopped registration messages to this DR 1, carry the multicast address information of multicast source in this stopped registration messages, promptly carry the address information of multicast source 1, the address information of the address information of multicast source 2 and multicast source 3, this stopped registration messages can be following form.

0 1 2 3

0?1?2?3?4?5?6?7?8?9?0?1?2?3?4?5?6?7?8?9?0?1?2?3?4?5?6?7?8?9?0?1

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

| Groupl?Address(Encoded-Group?format) |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

| Sourcel?Address(Encoded-Unicast?format) |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

| Group2?Address(Encoded-Group?format) |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

| Source2?Address(Encoded-Unicast?format) |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

| Group3?Address(Encoded-Group?format) |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

| Source3?Address(Encoded-Unicast?format) |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Wherein, this PIM Ver is a version number, this Type is the type of this stopped registration messages, the type field of this Reserved for reserving, this Checksum be verification and, this Group Address 1 is the multicast group address information of multicast source 1, this Source Address 1 is the address information of multicast source 1, this GroupAddress 2 is the multicast group address information of multicast source 2, this Source Address 2 is the address information of multicast source 2, this Group Address 3 is the multicast group address information of multicast source 3, this Source Address3 is the address information of multicast source 3, after DR1 receives this stopped registration messages, can from this stopped registration messages, get access to the multicast source 1 that carries in this stopped registration messages, the address information of multicast source 2 and multicast source 3 stops multicast source 1, the registration process of the multicast packet of multicast source 2 and multicast source 3.

Concrete, when carrying the multicast address information of multicast source in this stopped registration messages, the address information that can carry all multicast sources for example, is carried the address information of multicast source 1, the address information of the address information of multicast source 2 and multicast source 3); Also can only carry the address information of part multicast source, for example, carry the address information of multicast source 1 and the address information of multicast source 2 by stopped registration messages 1, the address information by stopped registration messages 2 is carried multicast source 3 sends to DR 1 with stopped registration messages 1 and stopped registration messages 2.

Step S306, DR 1 continues to send multicast packet from multicast source to RP by SPT.

Wherein, between DR 1 and RP, set up SPT after, the multicast packet that DR 1 will link to each other with this DR 1 is transferred to RP by SPT, and is transmitted to recipient's side DR, and finally is transferred to the recipient.

Among the present invention, DR 1 gets access to the address information of multicast source from this stopped registration messages after the stopped registration messages that receives from RP, finish the registration process of this multicast source.After registration process is finished, DR 1 will according to the default time (for example, to be preset as 1 minute the time), periodically send empty logon message (being that per minute sends once), to inform existing of RP multicast source, until this DR 1 knows that multicast source disappears to RP, DR 1 just can not send empty logon message to RP, when RP does not receive the empty logon message of multicast source in the default time, just this RP is gone up (S, G) list item deletion about this multicast source.

Concrete, DR 1 is by using (S, G) list item is stored the information (address information of multicast source, multicast group address information) of all multicast sources that are connected with this DR 1, and in this list item, be provided with this multicast source corresponding identification information, by using this identification information to represent to send the type of message, for example, when identification information is 1, expression need send empty logon message for this multicast source, and when identification information was 0, expression need send logon message for this multicast source.

In the default time, DR 1 receives after the stopped registration messages from RP, parses corresponding information about multicast source from this stopped registration messages, and the pairing identification information of this information about multicast source is set to 1; In the default time, DR 1 does not receive the pairing stopped registration messages of certain multicast source, the pairing identification information of this multicast source is set to 0 (wherein, be 0 when the pairing identification information of multicast source is original, if DR 1 does not receive the pairing stopped registration messages of multicast source, do not need to change the pairing identification information of this multicast source); For each identification information is 0 multicast source, and DR 1 continues to send respectively logon message by the mode of clean culture, until this identification information is till 1, does not repeat them here.

For identification information is 1 multicast source, and its registration process finishes (having received the stopped registration messages of this multicast source) as can be known, need be that 1 multicast source sends empty logon message for identification information, to inform existing of RP multicast source; From receiving a stopped registration messages, the default time cycle (for example, one minute) afterwards, (for example waiting for a period of time, 10s), DR 1 is that the source address information and the group address message of 1 multicast source adds in the empty logon message (for convenience of description, this sky logon message is the first empty logon message) with all identification informations, this first empty logon message is sent to RP, to inform existing of multicast source.Certainly, DR 1 also can be that the source address information of 1 multicast source and group address message add in a plurality of empty logon messages (when identification information is that 1 multicast source number is when very big with all identification informations, can carry source information by several empty logon messages, to prevent that the multicast source from can not carry all source information), a plurality of empty logon messages are sent to RP respectively.To carry all identification informations by the first empty logon message is that the source information of 1 multicast source is that example describes.

The first empty logon message is sent to after the RP, waiting for a period of time the back (for example, 10s), DR1 is that the source address information and the group address message of 1 multicast source (multicast source that does not carry in the above-mentioned first empty logon message) (for example adds an empty logon message to identification information, the second empty logon message) in and send to RP,, the source address information of all multicast sources and group address message send to RP until all adding in the sky logon message.(because identification information is 0 o'clock, DR 1 can periodically send logon message to RP, until receive stopped registration messages, identification information is revised as 1).

Among the present invention, because empty logon message need be according to preset period (for example, 1 minute) send to RP, the first empty logon message is sent to after the RP, wait for after this preset period, DR 1 will continue to send this first empty logon message to this RP, and will be identical with the process of transmitting of the first empty logon message for other the process of transmitting of empty logon message, not repeat them here.Certainly, DR 1 can be that (RP is after receiving the sky logon message for 1 multicast source according to identification information in time that receives stopped registration messages and the list item also, send stopped registration messages to DR 1) regenerate the sky logon message, the empty logon message that regenerates is sent to RP.

Concrete, for (the S that stores among DR 1 and the RP, G) list item is provided with ageing timer, when DR in ageing time 1 does not all receive multicast packet from multicast source, with this multicast source from this (S, G) delete in the list item, at this moment, DR 1 also needs the source information and the group information deletion (being about to the record deletion of this multicast source) of this multicast source that will carry in the empty logon message, at this moment, DR 1 can be that 1 multicast source regenerates the sky logon message according to identification information in time that receives stopped registration messages and the list item also.Same, for (S, G) list item among the RP, in ageing time, all do not receive the empty logon message (empty logon message does not carry the information of this multicast source) of multicast source correspondence, with this multicast source from (S G) deletes in the list item, and in stopped registration messages the deletion corresponding record.

Among the present invention, know and in empty logon message, (for example to carry a plurality of multicast sources with DR 1, multicast source 1, multicast source 2 and multicast source 3) information be that example describes, promptly by using an empty logon message with multicast source 1, the multicast address information of multicast source 2 and multicast source 3 sends to together to RP.This sky logon message can obtain by the mode of expanding existing empty logon message, and this existing empty logon message can be form as follows.

0 1 2 3

0?1?2?3?4?5?6?7?8?9?0?1?2?3?4?5?6?7?8?9?0?1?2?3?4?5?6?7?8?9?0?1

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

|B|N| Reserved2 |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

| |

· Multicast?data?packet ·

| |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Wherein, this PIM Ver is a version number, this Type is the type of this sky logon message, the type field of this Reserved for reserving, this Checksum be verification and, this B is that the position of multicast source and DR (for example concerns, when being 0, B represents that multicast source directly is connected with DR), this N be logon message type (for example, the value of this N is to represent that this message was empty logon message at 1 o'clock), the field of this Reserved 2 for reserving, by expanding this Reserved 2 a plurality of empty logon messages are integrated on the empty logon message among the present invention, thereby reduced the quantity of logon message greatly, the equipment that makes can be supported more massive multicast source quantity, and less bandwidth waste unnecessary in the network.The address information of multicast source and the address information of multicast group have been carried among this Multicast data packet, be that Multicast data packet field is the log-on data of a multicast source correspondence, comprise the source address, group address, agreement of this multicast source etc., amounted to 20 bytes.

Empty logon message among the present invention (for example, above-mentioned the first empty logon message) is a form as follows:

0 1 2 3

0?1?2?3?4?5?6?7?8?9?0?1?2?3?4?5?6?7?8?9?0?1?2?3?4?5?6?7?8?9?0?1

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

|B|N| |numbers?of?Multicast?data?packet?|

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

| |

· Multicast?data?packet?1

Multicast?data?packet2 ·

· ············ ·

· Multicast?data?packet?n ·

| |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Wherein, this PIM Ver is a version number, this Type is the type of this sky logon message, the type field of this Reserved for reserving, this Checksum be verification and, this B is that the position of multicast source and DR concerns, this N is the type of logon message, this numbers of Multicast data packet is back 8 bytes in the reserved field (Reserved2), is used to be extended to the multicast source number of carrying, and promptly represents the multicast source number by this numbers of Multicast data packet.The log-on data of Multicast data packet 1 expression multicast source 1 correspondence has comprised the source address, group address, agreement of this multicast source etc., amounts to 20 bytes; The log-on data of Multicast data packet 2 expression multicast sources 2 correspondences has comprised the source address, group address, agreement of this multicast source etc.; Multicast data packet n represents the log-on data of multicast source n correspondence, has comprised source address, group address, agreement of this multicast source etc.

After RP receives this sky logon message, from numbers of Multicast data packet, get access to the quantity information of multicast source, and obtain the address information of multicast source successively from empty logon message, promptly from this sky logon message, get access to the address information of the multicast source 1 that carries in this sky logon message successively, the address information of the address information of multicast source 2 and multicast source 3, in this RP, continue to safeguard (S, G) address information in the list item.

Step S307, RP send to recipient's side DR with this multicast packet after the multicast packet that receives from DR 1, by this recipient's side DR this multicast packet is sent to corresponding recipient.

Wherein, recipient's side DR sends to corresponding recipient with this multicast packet and is specially: DR 2 gives recipient 1 with muticast data transmission, and DR 3 gives recipient 2 with muticast data transmission, and DR 4 gives recipient 3 with muticast data transmission.

Concrete, RP is by using (S, G) list item is stored the information (address information of multicast source of all multicast sources, multicast group address information), and in this list item, be provided with this multicast source corresponding identification information, for example, when identification information was 1, expression need be safeguarded the information of this multicast source, for this multicast source sends stopped registration messages, when identification information is 0, expression does not receive the empty logon message of this multicast source, and for (S, G) multicast source of each in the list item is provided with ageing timer, when arriving ageing time, this identification information is 0 o'clock still, deletes (S, G) list item of this multicast source.

RP is after the empty logon message that receives from DR 1, from this sky logon message, parse the information of multicast source, with the corresponding (S of this multicast source institute, G) identification information of list item is set to 1, promptly need this multicast source is sent stopped registration messages, received the empty logon message of this multicast source to inform DR1.Among the present invention, RP waits for a period of time after receiving first sky logon message, the source address information and the group address message that with all identification informations are 1 multicast source add in the stopped registration messages (for example, first stopped registration messages), and this stopped registration messages is sent to DR 1; Certainly, RP also can be that the source address information and the group address message of 1 multicast source adds in a plurality of stopped registration messages with all identification informations, and a plurality of empty logon messages are sent to DR 1 respectively.First stopped registration messages is sent to after the DR 1, waiting for a period of time the back (for example, 10s), RP is that the source address information of 1 multicast source (multicast source that does not carry in above-mentioned first stopped registration messages) and group address message add in the stopped registration messages and send to RP with identification information, sends to DR 1 in the stopped registration messages until the source address information of all multicast sources and group address message all add to.Among the present invention, because RP periodically receives the sky logon message, be that RP also needs periodically to send stopped registration messages to DR 1, wait for after this preset period, RP will continue to send this first stopped registration messages to this DR 1, the process of transmitting of stopped registration messages for other is identical with the process of transmitting of first stopped registration messages, does not repeat them here.

Among the present invention, after RP is receiving empty logon message from DR 1, from this sky logon message, parse the information of multicast source, with the corresponding (S of this multicast source institute, G) identification information of list item is set to 1, at each empty logon message, RP returns stopped registration messages to DR 1, for example, carried multicast source 1 in the empty logon message, during the information of multicast source 2 and multicast source 3, RP returns to DR 1 and carries multicast source 1, the stopped registration messages of the information of multicast source 2 and multicast source 3; I.e. address information of carrying multicast source 1 in this stopped registration messages, the address information of the address information of multicast source 2 and multicast source 3, this stopped registration messages can be following form.

0 1 2 3

0?1?2?3?4?5?6?7?8?9?0?1?2?3?4?5?6?7?8?9?0?1?2?3?4?5?6?7?8?9?0?1

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

| Groupl?Address(Encoded-Group?format) |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

| Sourcel?Address(Encoded-Unicast?format) |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

| Group2?Address(Encoded-Group?format) |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

| Source2?Address(Encoded-Unicast?format) |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

| Group3?Address(Encoded-Group?format) |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

| Source3?Address(Encoded-Unicast?format) |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Wherein, each field is described in the above in the above-mentioned stopped registration messages, does not repeat them here.Because DR1 will periodically send empty logon message to this RP, promptly this RP needs periodically to return stopped registration messages to DR1.After DR receives the message that RP responds, according to the quantity of numbers, resolve successively, thereby obtain the stopped registration messages information of all multicast group.

Among the present invention, when RP receives DR (owing to filtering or other reason causes) in the time of can not responding the stopped registration messages that is integrated together, the stopped registration messages of these multicast sources is responded to DR separately by RP, the stopped registration messages of this response is existing stopped registration messages, is form as follows.

0 1 2 3

0?1?2?3?4?5?6?7?8?9?0?1?2?3?4?5?6?7?8?9?0?1?2?3?4?5?6?7?8?9?0?1

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

| Group?Address(Encoded-Group?format) |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

| Source?Address(Encoded-Unicast?format) |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Among the present invention, by expanding existing empty logon message and stopped registration messages, DR collects the empty logon message that sends to same RP in a registration period, the uniform format that is merged into then after the expansion sends, behind the empty logon message of RP after receiving expansion, reply stopped registration messages according to the uniform format after the expansion and give DR, wherein, form system after the expansion is for to be integrated into a plurality of messages in the message, thereby reduced greatly in the multicast service running, the quantity of logon message can realize supporting the situation of more massive multicast source, and has guaranteed the stability of multicast service.

Wherein, the inventive method can be adjusted each sequence of steps according to actual needs.

The transmission system of a kind of multicast packet that the present invention also proposes, as shown in Figure 4, this system comprises at least two multicast sources (is to describe with multicast source 411, multicast source 412 and multicast source 413), the source Designated Router 42 and the convergent point 43 that are connected with described at least two multicast sources, wherein:

Described multicast source 411 is used for sending multicast packet to described source Designated Router 42.

Wherein, multicast source 412 and multicast source 413 all send multicast packet to source Designated Router 42, and sending multicast packet with multicast source 411 among the present invention is that example describes.

Described source Designated Router 42 is used to inquire about the identification information of at least two multicast sources described in the first multicast corresponding relation, and described identification information represents to send to described convergent point 43 type of logon messages; When described identification information is represented when the type that described convergent point 43 sends logon messages is empty logon message, the multicast address information of the multicast source of described identification information correspondence is added in the sky logon message; And described empty logon message sent to described convergent point 43.

Described convergent point 43 is used for the identification information of the described multicast source of multicast address information setting of the multicast source that carries according to described empty logon message, and described identification information represents to send to described source Designated Router 42 type of logon messages; Inquire about the identification information in the second multicast corresponding relation, when described identification information is represented when the type that described source Designated Router 42 sends logon messages is stopped registration messages, the multicast address information of the multicast source of described identification information correspondence is added in the stopped registration messages; And described second stopped registration messages sent to described source Designated Router 42.

The invention allows for a kind of transmission equipment of registration multicast packet of multicast source, be applied to comprise in the system of at least two multicast sources, the source Designated Router that is connected with described at least two multicast sources and convergent point, the device registration of described multicast source is as described source Designated Router, as shown in Figure 5, comprising:

Transport module 51 is used for the multicast packet from described at least two multicast sources is transferred to described convergent point by SPT branch.

Receiver module 52, electrically connect with described transport module 51, be used for when described convergent point receives the multicast packet of described transport module 51 transmission by SPT branch for the first time, reception is carried the multicast address information of at least one multicast source from first stopped registration messages of described convergent point in described first stopped registration messages.

Wherein, described receiver module 52 also is used for: receive second stopped registration messages from described convergent point, described second stopped registration messages is carried the multicast address information of at least one multicast source.

Acquisition module 53 electrically connects with described receiver module 52, is used for obtaining according to first stopped registration messages that described receiver module 52 receives the multicast address information of at least one multicast source of described first stopped registration messages.

Module 54 is set, electrically connects with described acquisition module 53, the pairing identification information of at least one multicast source that is used for described acquisition module 53 acquisitions is set to send to described convergent point the type of empty logon message.

Enquiry module 55 electrically connects with the described module 54 that is provided with, and is used to inquire about the identification information of at least two multicast sources that module 54 settings are set described in the multicast corresponding relation, and described identification information represents to send to described convergent point the type of logon message.

Add module 56, electrically connect with described enquiry module 55, be used for Query Result when described enquiry module 55 and be described identification information and represent when the type that described convergent point sends logon message is empty logon message, the multicast address information of the multicast source of described identification information correspondence is added in the sky logon message.

Sending module 57 electrically connects with described interpolation module 56, is used for the empty logon message after described interpolation module 56 interpolations is sent to described convergent point.

Wherein, each module of apparatus of the present invention can be integrated in one, and also can separate deployment.Above-mentioned module can be merged into a module, also can further split into a plurality of submodules.

The invention allows for a kind of device registration of multicast source, be applied to comprise in the system of at least two multicast sources, the source Designated Router that is connected with described at least two multicast sources, convergent point, recipient and the recipient's side Designated Router that is connected with described recipient, the device registration of described multicast source is as described convergent point, as shown in Figure 6, described convergent point comprises:

Transport module 61, be used for when described convergent point receives the multicast packet of described at least two multicast sources by SPT branch, give described recipient's side Designated Router with described muticast data transmission, give described recipient with described muticast data transmission by described recipient's side Designated Router; And judge that whether described multicast packet is the multicast packet of described at least two multicast sources of receiving by SPT branch for the first time.

Add module 62, electrically connect with described transport module 61, be used for when the judged result of described transport module 61 when being, the multicast address information of described at least two multicast sources is added in first stopped registration messages.

Wherein, convergent point is for each multicast packet that receives, obtain the information about multicast source of this multicast packet,, add module 62 information of this multicast source is added in first stopped registration messages when this multicast packet is this multicast source when sending to convergent point by SPT branch for the first time; When the informational needs of a plurality of (at least one) multicast source adds, to add module 62 information of at least one multicast source is added to during same first registration stops, the information of this multicast source comprises the address information and the multicast address information of multicast source.

Sending module 63 electrically connects with described interpolation module 62, is used for first stopped registration messages after described interpolation module 62 interpolations is sent to described source Designated Router.

Receiver module 64 is used to receive the empty logon message from described source Designated Router, the multicast address information of carrying at least one multicast source in the described empty logon message.

Acquisition module 65 electrically connects with described receiver module 64, is used for obtaining according to the empty logon message that described receiver module 64 receives the multicast address information of at least one multicast source of described empty logon message.

Module 66 is set, electrically connects with described acquisition module 65, the pairing identification information of at least one multicast source that is used for described acquisition module 65 acquisitions is set to send to described source Designated Router the type of stopped registration messages.

Enquiry module 67 electrically connects with the described module 66 that is provided with, and is used to inquire about the identification information of at least two multicast sources that module 66 settings are set described in the multicast corresponding relation, and described identification information represents to send to described source Designated Router the type of logon message.

Above-mentioned interpolation module 62 also electrically connects with described enquiry module 67, be used for Query Result when described enquiry module 67 and be described identification information and represent when the type that described source Designated Router sends logon message is stopped registration messages, the multicast address information of the multicast source of described identification information correspondence is added in second stopped registration messages.

Above-mentioned sending module 63 also is used for second stopped registration messages after described interpolation module 62 interpolations is sent to described source Designated Router.

Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by hardware, also can realize by the mode that software adds necessary general hardware platform.Based on such understanding, technical scheme of the present invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise that some instructions are with so that a computer equipment (can be personal computer, server, perhaps network equipment etc.) is carried out method of the present invention.

The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be looked protection scope of the present invention.

It will be appreciated by those skilled in the art that the module in the device among the embodiment can be distributed in the device of embodiment according to the embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from present embodiment.The module of the foregoing description can be merged into a module, also can further split into a plurality of submodules.

The invention described above sequence number is not represented the quality of embodiment just to description.

More than disclosed only be several specific embodiment of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.

Claims

1, a kind of register method of multicast source is applied to comprise in the system of at least two multicast sources, the source Designated Router that is connected with described at least two multicast sources and convergent point, it is characterized in that, said method comprising the steps of:

2, the method for claim 1 is characterized in that, before the identification information of at least two multicast sources, also comprises described in the described source Designated Router inquiry multicast corresponding relation:

3, method as claimed in claim 2 is characterized in that, after first stopped registration messages of described source Designated Router reception from described convergent point, also comprises:

4, the method for claim 1 is characterized in that, described source Designated Router sends to described empty logon message after the described convergent point, also comprises:

5, a kind of register method of multicast source is applied to comprise in the system of at least two multicast sources, the source Designated Router that is connected with described at least two multicast sources and convergent point, it is characterized in that, said method comprising the steps of:

6, method as claimed in claim 5 is characterized in that, before the identification information of at least two multicast sources, also comprises described in the described convergent point inquiry multicast corresponding relation:

7, method as claimed in claim 6, also comprise recipient and the recipient's side Designated Router that is connected with described recipient in the system that described method is used, it is characterized in that, before the empty logon message of described convergent point reception from described source Designated Router, also comprise:

8, a kind of Accreditation System of multicast source is characterized in that, comprises at least two multicast sources, the source Designated Router and the convergent point that are connected with described at least two multicast sources, wherein:

9, a kind of device registration of multicast source, be applied to comprise in the system of at least two multicast sources, the source Designated Router that is connected with described at least two multicast sources and convergent point, the device registration of described multicast source is as described source Designated Router, it is characterized in that described source Designated Router comprises:

10, equipment as claimed in claim 9 is characterized in that, also comprises:

11, equipment as claimed in claim 10 is characterized in that, also comprises:

12, equipment as claimed in claim 10 is characterized in that,

Described receiver module also is used for: receive second stopped registration messages from described convergent point, described second stopped registration messages is carried the multicast address information of at least one multicast source.

13, a kind of device registration of multicast source, be applied to comprise in the system of at least two multicast sources, the source Designated Router that is connected with described at least two multicast sources and convergent point, the device registration of described multicast source is characterized in that as described convergent point described convergent point comprises:

14, equipment as claimed in claim 13 is characterized in that, also comprises:

15, equipment as claimed in claim 14 also comprises recipient and the recipient's side Designated Router that is connected with described recipient in the system that described equipment is used, and it is characterized in that, also comprises:

Described interpolation module also is used for:

Described sending module also is used for: