CN101170489A - IGMP message transmission system - Google Patents
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Abstract
The invention provides a system and a method for IGMP message transmission. The system comprises at least one user terminal applied for sending IGMP messages to a IGMP message retransmission device which is used for receiving and combining the IGMP messages from at least one user terminal, and sending the combined IGMP messages to a IGMP message resolver which is used for receiving and resolving the combined IGMP messages from the IGMP message retransmission device, and dealing with the resolved the IGMP messages. The invention can realize that the in a network can be reduced and the CPU processing time of a multicast communication device can be decreased.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of IGMP message transfer system.
Background technology
The professional general network model that adopts as shown in Figure 1 of the group broadcasting video frequency of carrying out on the present data network: network system comprises video service system, IP metropolitan area network, broadband access network and four parts of user network.
Video service system is realized functions such as video user management and video coding, and video traffic is sent into metropolitan area network; The IP metropolitan area network is delivered to broadband access network by the IP multicast functionality with video traffic; Broadband access network realizes that consumer wideband network connection authentication management, video group add/leave controlled function, and the video flowing that the user is required sends to the user; User network comprises CPE (Customer Premises Equipment customer premises equipment, CPE), PC, video STB equipment such as (Set Top Box set-top box), the interconnected formation one family of these device interiors local area network (LAN), the user adds if desired or leaves some channels, so just needs to send IGMP (Internet Group Management Protocol the Internet multicast member management protocol) and adds and leave message.
Broadband access network generally comprises convergence switch and edge device such as DSLAM (Digital Subscriber Line Access Multiplexer Digital Subscriber Line Access Multiplexer).When the user is many, just need convergence switch that the very strong disposal ability to the IGMP message is arranged.Though can adopt IGMP PROXY (agency) function on edge device, when the channel that can select as the user was many, the message of inhibition was limited.
When PC or STB on-demand multicasting program, adopt the mode that IGMP REPORT joins message that sends.IGMP has three versions, is respectively V1, V2, V3, the general at present IGMPV2 that adopts.When the protocol number of IP header is 2, show it is the IGMP message.IGMPV2 message content form is as shown in Figure 3:
Type: expression IGMP type of message.
0x16 member's report message, expression adds a group;
The 0x17 leave message, a group is left in expression;
Whether 0x11 membership query, multicast router are used for inquiring about and have users, and are divided into general polling and ad hoc inquiry.Ad hoc inquiry is whether certain group of inquiry exists the user; General polling is which group of inquiry has the user.
Max Response Time maximum response time, default value is 10 seconds, promptly receive query message after, at this moment between in response send the REPORT message.Group Address group address is indicated to add or is left or the group address of ad hoc inquiry.
Promptly work as a user and add a channel, need to send one and join message; When edge device did not play IGMP PROXY, message was transparent to convergence switch from edge device; When playing IGMP PROXY, edge device sends to the message number of convergence switch, is at least: the channel number that the user watched that this edge device inserts.Therefore when the many and selectable channel of user is many, need the big disposal ability of convergence switch equally.
Summary of the invention
At above one or more problems, the present invention will provide a kind of IGMP message transfer system and method, can realize reducing IGMP message in the network, reduces the cast communication equipment CPU processing time.
IGMP message transfer system according to the present invention comprises: at least one user terminal 302 is used for the IGMP message is sent to the IGMP apparatus for forwarding message; IGMP apparatus for forwarding message 304 be used to receive and merge the IGMP message from least one user terminal, and the IGMP message after will merging is sent to IGMP packet parsing device; And IGMP packet parsing device 306, be used to receive and decompose, and the IGMP message after decomposing is handled from the IGMP message after the merging of IGMP apparatus for forwarding message.
Above-mentioned IGMP apparatus for forwarding message 304 comprises: message receiving element 304-2 is used to receive from the IGMP message of at least one user terminal and responds, and receives from the message of IGMP packet parsing device and respond; Timer 304-4 is used to control time of timed sending IGMP message; The message merge cells is used to merge the IGMP message that receives, and the timer timing to or merge after the IGMP message reached under the situation of MTU, the IGMP message after merging is sent to IGMP packet parsing device; And check and computing unit 304-6, be used for the timer timing to or merge after the IGMP message reached under the situation of MTU, calculate the IGMP message check and, and will check and be inserted in the IGMP message after the merging.
The timer timing not to and merge after the IGMP message do not reach under the situation of MTU, the message merge cells upgrades the IGMP message that has had the user after receiving the IGMP message that has the user.
Above-mentioned message merge cells can merge the IGMP message of one or more versions.
Above-mentioned IGMP message comprises that IGMP joins message and IGMP leave message.
Above-mentioned message receiving element 3042 is receiving under the situation that IGMP joins message, and judges whether send the user that IGMP joins message adds, if not have adding then generate user's outlet multicast forward table; Receiving under the situation of IGMP leave message, judging whether the user who sends IGMP leave message is to leave fast, if then user's information is deleted, if leave slowly, then whether really leaves to user's query from multicast forward table.
Above-mentioned message receiving element 304-2 is under situation about receiving from the general polling message of IGMP packet parsing device, judge whether the IGMP apparatus for forwarding message plays igmp proxy, if do not have, the general polling message that arrives at least one user terminal broadcast reception then; Under the situation that has played igmp proxy, judge whether IGMP packet parsing device has played user's authentication function, if risen, then indicate the message merge cells to merge all users' of all groups IGMP message, if do not play authentication function or authentication function, then indicate the message merge cells to merge a user's of each group message at IGMP apparatus for forwarding message itself.
Above-mentioned IGMP packet parsing device 304 comprises: check and verification unit 304-2 are used for checking the check of the IGMP message that receives and whether correct; Packet parsing unit 304-4 is used under check and correct situation the IGMP message that receives being resolved and being handled; The processing unit 304-6 that joins message is used for the IGMP that parses joined message and handles; And leave message processing unit 304-8, be used for the IGMP leave message that parses is handled.
Under check and correct situation, the processing unit 304-6 that joins message judges whether IGMP packet parsing device plays multicast user's authentication function; Under the situation that has been judged as multicast user's authentication function, judge whether to add multicast data flow, whether the port of judging the user place if permission adds is adding the middle existence of transmitting of multicast data flow, if there is no, then generate user's multicast forward table,, then write down and withdraw from if exist, if do not allow to add, then write down and withdraw from; Be judged as under the situation that does not play multicast user's authentication function, judging whether to add multicast data flow,, then generating multicast forward table,, then withdrawing from if add if do not add.
Under check and correct situation, leave message processing unit 304-8 judges whether IGMP packet parsing device plays multicast user's authentication function; Under the situation that has been judged as multicast user's authentication function, judge whether the user has added multicast data flow, if not then withdraw from, if the user has added multicast data flow, whether then judge in the multicast data flow that will leave exists other users identical with the port of user place IGMP packet parsing device, if exist then write down and withdraw from, if there is no, then write multicast forward table and delete port.
Above-mentioned IGMP apparatus for forwarding message can be positioned at user's convergence device side, and IGMP packet parsing device can be positioned at the Digital Subscriber Line Access Multiplexer side.
Above-mentioned IGMP apparatus for forwarding message can be positioned at the Digital Subscriber Line Access Multiplexer side, and IGMP packet parsing device can be positioned at the Broadband Remote Access Server side.
The present invention provides and reduces the message processing on the basis of existing equipment.The IGMP message that promptly merges a plurality of users reduces IGMP message in the network, reduces the cast communication equipment CPU processing time, thereby reaches the purpose that improves the multicast access customer number.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the networking structure schematic diagram of group broadcasting video frequency system;
Fig. 2 is the IGMPV2 message format;
Fig. 3 A to Fig. 3 C is the block diagram according to IGMP message transfer system of the present invention;
Fig. 4 is a merging IGMP message format of the present invention;
Fig. 5 is an a user's of the present invention concrete filling form;
Fig. 6 A and Fig. 6 B are the flow charts according to IGMP message transmitting method of the present invention;
Fig. 7 is the part networking structure schematic diagram (access control point and multicast replication point are all at DSLAM) of group broadcasting video frequency system;
Fig. 8 A to Fig. 8 C is the forming process of merging message of the present invention;
Fig. 9 is the part networking structure schematic diagram (access control point and multicast replication point are all at BRAS (Broadband Remote Server, Broadband Remote Access Server)) of group broadcasting video frequency system; And
Figure 10 is the part networking structure schematic diagram (access control point at BRAS and multicast replication point all at DSLAM) of group broadcasting video frequency system.
Embodiment
Below with reference to accompanying drawing, describe the specific embodiment of the present invention in detail.
Fig. 3 A is the block diagram according to IGMP message transfer system 300 of the present invention.As shown in Figure 3A, the IGMP message transfer system comprises: at least one user terminal 302 is used for the IGMP message is sent to the IGMP apparatus for forwarding message; IGMP apparatus for forwarding message 304 be used to receive and merge the IGMP message from least one user terminal, and the IGMP message after will merging is sent to IGMP packet parsing device; And IGMP packet parsing device 306, be used to receive and decompose, and the IGMP message after decomposing is handled from the IGMP message after the merging of IGMP apparatus for forwarding message.
Shown in Fig. 3 B, IGMP apparatus for forwarding message 304 comprises: message receiving element 304-2 is used to receive from the IGMP message of at least one user terminal and responds, and receives from the message of IGMP packet parsing device and respond; Timer 304-4 is used to control time of timed sending IGMP message; Message merge cells 304-6 is used to merge the IGMP message that receives, and the timer timing to or merge after the IGMP message reached under the situation of MTU, the IGMP message after merging is sent to IGMP packet parsing device; And check and computing unit 304-8, be used for the timer timing to or merge after the IGMP message reached under the situation of MTU, calculate the IGMP message check and, and will check and be inserted in the IGMP message after the merging.
The timer timing not to and merge after the IGMP message do not reach under the situation of MTU, the message merge cells upgrades the IGMP message that has had the user after receiving the IGMP message that has the user.
Wherein, the message merge cells can merge the IGMP message of one or more versions.
Wherein, above-mentioned IGMP message comprises that IGMP joins message and IGMP leave message.
Message receiving element 304-2 is receiving under the situation that IGMP joins message, and judges whether send the user that IGMP joins message adds, if not have adding then generate user's outlet multicast forward table; Receiving under the situation of IGMP leave message, judging whether the user who sends IGMP leave message is to leave fast, if then user's information is deleted, if leave slowly, then indicates to user's query and whether really leaves from multicast forward table.
The message receiving element judges whether the IGMP apparatus for forwarding message plays igmp proxy under situation about receiving from the general polling message of IGMP packet parsing device, if do not have, and the general polling message that arrives at least one user terminal broadcast reception then; Under the situation that has played igmp proxy, judge whether IGMP packet parsing device has played user's authentication function, if risen, then indicate the message merge cells to merge all users' of all groups IGMP message, if do not play authentication function or authentication function, then indicate the message merge cells to merge a user's of each group message at IGMP apparatus for forwarding message itself.
Shown in Fig. 3 D, IGMP packet parsing device 306 comprises: check and verification unit 306-2 are used for checking the check of the IGMP message that receives and whether correct; Packet parsing unit 306-4 is used under check and correct situation the IGMP message that receives being resolved and being handled; The processing unit 306-6 that joins message is used for the IGMP that parses joined message and handles; And leave message processing unit 306-8, be used for the IGMP leave message that parses is handled.
Under check and correct situation, the processing unit 306-6 that joins message judges whether IGMP packet parsing device plays multicast user's authentication function; Under the situation that has been judged as multicast user's authentication function, judge whether to add multicast data flow, whether the port of judging the user place if permission adds is adding the middle existence of transmitting of multicast data flow, if there is no, then generate user's multicast forward table,, then write down and withdraw from if exist, if do not allow to add, then write down and withdraw from; Be judged as under the situation that does not play multicast user's authentication function, judging whether to add multicast data flow,, then generating multicast forward table,, then withdrawing from if add if do not add.
Under check and correct situation, leave message processing unit 306-8 judges whether IGMP packet parsing device plays multicast user's authentication function; Under the situation that has been judged as multicast user's authentication function, judge whether the user has added multicast data flow, if not then withdraw from, if the user has added multicast data flow, whether then judge in the multicast data flow that will leave exists other users identical with the port of user place IGMP packet parsing device, if exist then write down and withdraw from, if there is no, then write multicast forward table and delete port.
The IGMP apparatus for forwarding message can be positioned at user's convergence device side, and IGMP packet parsing device can be positioned at the Digital Subscriber Line Access Multiplexer side.
The IGMP apparatus for forwarding message can be positioned at the Digital Subscriber Line Access Multiplexer side, and IGMP packet parsing device can be positioned at the Broadband Remote Access Server side.
IGMP apparatus for forwarding message of the present invention (equipment 1) has following characteristics:
1, can be correct accept user IGMP message, and can merge, and be sent to equipment 2 the IGMP message.
2, need note user's characteristic information: IP address, user's MAC address, the port numbers at user place etc.
3, in order in time to send the IGMP message after the merging, need to set a timer, its timing cycle defaults to 20 milliseconds, and size can be regulated.If timing cycle does not arrive, and the message after merging has reached MTU (MTU), can send to equipment 2 immediately.
If the message after 4 merging does not also send, receive a user's IGMP message again, this user's IGMP message content is arranged in the message after the merging that does not send as yet, can remove this user's content, merge this up-to-date user IGMP message.
5, IGMP message that can compatible different editions receives that the IGMP of different editions goes into message, the normal merging.
Intercept if 6 play IGMP SNOOPING, receive that user IGMP joins message, judge whether this user adds,, be formed with the multicast forward table of this subscriber's outlet if do not add; If leave message judges whether this user adds,, directly withdraw from if do not add; If add, judge whether to leave fast, if this user's outlet is deleted from multicast forward table.If leave slowly, send the query message of particular group, whether really leave to user's query.
1, receive the processing of the general polling message of equipment 2, be divided into this equipment and whether play IGMP PROXY agency, if do not have, the general polling message to users broadcasting; If played IGMP PROXY, also need judgment device 2 or whether dispose multicast user's authentication function at last equipment, if played authentication function, need all users' of all groups of merging IGMP message, and send to equipment 2; If it is just own at equipment 1 not play authentication function or authentication function, only need to merge a user's of each group message, send to equipment 2.In the message of this merging, there is not leave message.
2, for reaching the merging effect, the message after the merging still is the IGMP message, and promptly IP protocol number still is 2.Can adopt form as Fig. 4 and Fig. 5:
Type Type:0xef=multi-user adds/leaves.
Version Version: 0x01, conveniently expansion later at present.
Check and Checksum: verification and be 16 detections of IGMP message-length (IP wrap whole pay(useful) load).This territory is made as 0, calculation check and the time this territory wrapped in together calculate.When transmitting bag, must calculate this verification with and be inserted in this territory and go.When receiving bag, this verification and must before handling this bag, testing.
User record is counted Number of Host Records: have what users to add/leave group below the user record numerical table shows.
User record Host Records: user record is represented a concrete user's adding or is left.
Concrete user record form is as shown in Figure 5:
IGMP Message, just the same with user's IGMP message, be that the user adds or when leaving, directly copy is come.
IP address Host IP Address: the user sends the IP address that adds when leaving.
User's MAC address Host MAC Address;
The user sends the MAC Address that adds when leaving
Vlan ID is made up of 12 bits:
Distribute to user's VLAN ID, perhaps the VLAN ID at user place;
Type, Length, three fields of Value are one group, expression and one type subscriber-related information.
Type Type possibility value is as follows:
Hostname (0x01) user name
Password (0x02) user cipher
Vlan id (0x03) user's inner VLAN ID
When the Type value was 0, expression TLV finished.
Length is the length of Value, and unit is a byte, and the length of Value depends on the value of Type.When Type was user name and user cipher, length was 32; When being VLAN ID, length is 2.Other reservations.User name and user cipher generally are to use when the multicast user is authenticated.
1, receives the IGMP message of merging, can correct resolving into join message and leave message.
2 if join message, and judges whether this equipment plays multicast user's authentication function, if played authentication function, A1 is not if play authentication function, A2;
A1 authenticates, and judges whether to add, if allow to add A11, if do not allow to add A12.
Whether A11, the port of judging this user place equipment 2 in the transmitting of institute's adding group, if do not exist, form multicast forward table; If exist, write down and withdraw from.
A12 writes down and withdraws from.
A2 judges whether to add, if do not add, forms multicast forward table; If add, withdraw from.
3 if leave message judges whether this equipment plays multicast user's authentication function, if played authentication function B1, if do not play authentication function B2;
B1 judges whether this user adds, if do not add, withdraws from; If add, the port of user place equipment 2 is identical therewith whether other users in the group that judgement will be left, if exist, record withdraws from; If there is no, write multicast forward table, delete this port;
B2 judges whether this user adds, if do not add, withdraws from; If add, write multicast forward table, delete this port.
Fig. 6 A is the block diagram according to IGMP message transfer system of the present invention.As shown in Figure 6A, IGMP message transmitting method of the present invention may further comprise the steps: step S602, and at least one user terminal is sent to the IGMP apparatus for forwarding message with the IGMP message; Step S604, reception of IGMP apparatus for forwarding message and merging are from the IGMP message of at least one user terminal, and the IGMP message after will merging is sent to IGMP packet parsing device; And step 606, IGMP packet parsing device receives and decomposes from the IGMP message after the merging of IGMP apparatus for forwarding message, and the IGMP message after decomposing is handled.
Shown in Fig. 6 B, step S604 comprises: step S604-2, IGMP apparatus for forwarding message receive from the IGMP message of at least one user terminal and/or from the message of IGMP packet parsing device and respond; Step S604-4, the timer timing not to or merge after IGMP message when not reaching MTU, the IGMP apparatus for forwarding message merges the IGMP message; And step S604-6, the IGMP apparatus for forwarding message the timer timing to or merge after the IGMP message reached under the situation of MTU, calculate the IGMP message check and, and will check and be inserted in the IGMP message after the merging and be sent to IGMP packet parsing device.
The timer timing not to and merge after the IGMP message do not reach under the situation of MTU, the message merge cells upgrades the IGMP message that has had the user after receiving the IGMP message that has the user.
Wherein, the IGMP apparatus for forwarding message can merge the IGMP message of one or more versions.Above-mentioned IGMP message comprises that IGMP joins message and IGMP leave message.
Among the step S604-2, receiving under the situation that IGMP joins message, judging whether send the user that IGMP joins message adds; If do not have to add then generate user's outlet multicast forward table.
Among the step S604-2, receiving under the situation of IGMP leave message, judging whether the user who sends IGMP leave message is to leave fast; If leave fast, then user's information is deleted from multicast forward table, if leave slowly, then whether really leave to user's query.
Among the step S604-2, under situation about receiving, judge whether the IGMP apparatus for forwarding message plays igmp proxy from the general polling message of IGMP packet parsing device; If do not play igmp proxy, the general polling message that arrives at least one user terminal broadcast reception then; Under the situation that has played igmp proxy, judge whether IGMP packet parsing device has played user's authentication function; If played user's authentication function, then merge all users' of all groups IGMP message, if do not play authentication function or authentication function, then merge a user's of each group message at IGMP apparatus for forwarding message itself.
Among the step S606, the IGMP message be IGMP join message and check with correct situation under, judge whether IGMP packet parsing device plays multicast user's authentication function; Under the situation that has been judged as multicast user's authentication function, judge whether to add multicast data flow, if do not play multicast user's authentication function, then write down and withdraw from; If allow to add, judge then whether the port at user place is adding the middle existence of transmitting of multicast data flow, if do not allow to add, then write down and withdraw from; If there is no, then indicate second to transmit the multicast forward table that processing unit generates the user,, then write down and withdraw from if exist.
Among the step S606, the IGMP message be IGMP join message and check with correct situation under, judge whether IGMP packet parsing device plays multicast user's authentication function; Be judged as under the situation that does not play multicast user's authentication function, judging whether to add multicast data flow; If do not add, then generate multicast forward table, if add, then withdraw from.
Among the step S606, be under IGMP leave message and check and the correct situation, judge whether IGMP packet parsing device plays multicast user's authentication function at the IGMP message; Under the situation that has been judged as multicast user's authentication function, judge whether the user has added multicast data flow; If not then withdraw from,, then judge in the multicast data flow that to leave whether exist other users identical with the port of user place IGMP packet parsing device if the user has added multicast data flow; If exist then write down and withdraw from, if there is no, then write multicast forward table and delete port.
Wherein, the IGMP apparatus for forwarding message can be positioned at user's convergence device side, and IGMP packet parsing device can be positioned at the Digital Subscriber Line Access Multiplexer side.
Wherein, the IGMP apparatus for forwarding message can be positioned at the Digital Subscriber Line Access Multiplexer side, and IGMP packet parsing device can be positioned at the Broadband Remote Access Server side.
From technical scheme provided by the invention as can be seen, when the user was many, when especially receiving the general polling message, the IGMP message was many on the network.When having adopted merging user IGMP method of message, reduced the flow of IGMP message on the network, just having reduced the time of the processing IGMP message of multicast equipment, accordingly is exactly under the constant situation of existing disposal ability, has strengthened multicast user's access amount.
Core concept of the present invention is the IGMP message that merges the user, therefore receives the equipment that the IGMP message handles and transmit it and can use the present invention.
In order to guarantee that in case the user files an application, just can directly receive data flow from upstream router, thereby guarantee the delay and the switching channels matter of time of IPTV Business Stream, often adopt the method for configuring static multicast, set up SACP to the multicast packet transparent channel between multicast source.
According to networking diagram shown in Figure 7, be that multicast service control point and multicast replication point are all on DSLAM.
User's convergence device comprises the ONU (optical network unit) in the EPON system, two-layer switching equipment, and ADSL MODEM or the like can move the equipment of IGMP agreement.
Three video terminals 702,704 and 706, its MAC Address is respectively MAC1, MAC2, MAC3, the IP address is respectively IP1, IP2, IP3 is connected on the port one of user's convergence device, 2,3; 4 multicast channels are arranged in the network, be respectively G1, G2, G3, G4; The video terminal user can add different channels.
Start the timer that timed sending multi-user IGMP adds leave message on user's convergence device, its cycle duration can be provided with according to the network actual conditions, defaults to 20MS.
Video terminal 702 sends IGMP REPORT (IGMP asks to add, and is example with IGMPV2), and request adding group 1 has been received on user's convergence device to join message, according to the new type of message of the IGMP of format organization of Fig. 4 and Fig. 5: 0Xef.User record Host Records is 1, user's IP address, and MAC Address is got from message.If be timed to, calculate to form new message check and, just send to upper layer device such as DSLAM with stylish IGMP message; If timing cycle is less than, second video terminal, 704 request adding groups 2 merge to the information of terminal 704 among the new IGMP, and it is 2 that user record HostRecords adds 1, same IP2, and MAC2 gets from message.If timer arrives, calculate check and, the message that is writing down two user profile is sent to upper layer device.The 3rd video terminal switches to channel 4 from channel 3, and the whole organizational process of message is shown in Fig. 8 A to Fig. 8 C.
Upper layer device receives that type is the IGMP message of 0Xef:
Step 1: whether check IGMP message is checked and is made mistakes, if make mistakes, abandons.If correct, execution in step 2;
Step 2: parse 4 IGMP messages, and take out each user profile.Which kind of type of message differentiation is, if join message, and execution in step 3, if leave message, execution in step 4;
Step 3: to first user profile IP1, whether MAC1 can join G1 authenticates, if do not allow to add, just withdraws from; Add execution in step 31 if allow;
Step 31: judge IP1, whether MAC1 joins G1 for the first time, if add for the first time, then increases this in the transmitting of multicast G1, and notifies access control, adds successfully.If not adding for the first time, withdraw from.
Step 4: judge IP3, whether MAC3 has added G3, if do not add, just withdraws from, if add, judges whether to leave fast, if leave fast, access control is notified in deletion from transmit simultaneously.
Fig. 9 is all situations on BRAS of multicast service control point and multicast replication point.
The situation of supporting and do not support to merge the IGMP message on user's convergence device is described respectively below.
The support of user's convergence device merges the disposition of IGMP message: user's convergence device has merged user's message, sends to DSLAM, and DSLAM decomposes on the one hand, forms two-layer retransmitting table; The IGMP message that is combined on the other hand can merge once more, sends to BRAS.That is to say, as long as timing is less than, do not reach MTU, just can continue to merge, forming new type is the message of 0xef.
User's convergence device is received the general polling message, according to the actual online situation of user, merges joining message of user.As user 1, the user 2, and user 3 is respectively at G1, G2, and G4, merging the back, only to need to send an IGMP message just much of that.
User's convergence device does not support to merge the disposition of IGMP message: user's convergence device is transmitted user's IGMP message to DSLAM, DSLAM merges user's adding leave message, promptly having only type is 0x17,0x16,0x12IGMP can merge, and the message that forms new type and be 0xef sends to BRAS.
User's convergence device is received the general polling message, according to the actual online situation of user, sends joining message of user respectively.As user 1, the user 2, and user 3 is respectively at G1, G2, and G4 needs to send joining message of three IGMP.
BRAS receives that type is the IGMP message of 0xef, after message audit is passed through, decomposes, if joining message of user authenticates user profile, after authentication was passed through, formation was transmitted, and multicast data flow is delivered to DSLAM; If authentication is not passed through, abandon.
Figure 10 is that the multicast service control point is at BRAS and the equal situation on DSLAM of multicast replication point.
The adding leave message that merges IGMP on DSLAM do not transmit but form, but the multi-user IGMP message after merging sends to BRAS, need be on the port information band on the DSLAM at user place, in order to authentication during merging.BRAS tests after receiving, after upchecking, decomposes and judgement, if joining message of user authenticates user profile, after authentication was passed through, notice DSLAM formed and transmits accordingly.If authentication is not passed through, abandon.If leave message judges that whether this user exists in corresponding group, if there is no, abandons; If exist, notice DSLAM, deletion from transmit accordingly.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. IGMP message transfer system is characterized in that comprising:
At least one user terminal is used for the IGMP message is sent to the IGMP apparatus for forwarding message;
Described IGMP apparatus for forwarding message be used to receive and merge the IGMP message from described at least one user terminal, and the IGMP message after will merging is sent to IGMP packet parsing device; And
Described IGMP packet parsing device is used to receive and decompose from the IGMP message after the merging of described IGMP apparatus for forwarding message, and the IGMP message after decomposing is handled.
2. IGMP message transfer system according to claim 1 is characterized in that, described IGMP apparatus for forwarding message comprises:
The message receiving element is used to receive from the IGMP message of described at least one user terminal and responds, and receives from the message of described IGMP packet parsing device and respond;
Timer is used to control time of timed sending IGMP message;
The message merge cells is used to merge the IGMP message that receives, and the timer timing to or merge after the IGMP message reached under the situation of MTU, the IGMP message after merging is sent to described IGMP packet parsing device; And
Check and computing unit, be used for described timer timing to or merge after the IGMP message reached under the situation of MTU, the check of calculating the IGMP message with, and will check and be inserted in the IGMP message after the merging.
3. IGMP message transfer system according to claim 1, it is characterized in that, described timer timing not to and merge after the IGMP message do not reach under the situation of MTU, described message merge cells upgrades the described IGMP message that has had the user after receiving the IGMP message that has the user.
4. IGMP message transfer system according to claim 1 is characterized in that, described message merge cells merges the IGMP message of one or more versions.
5. IGMP message transfer system according to claim 1 is characterized in that, described IGMP message comprises that IGMP joins message and IGMP leave message.
6. IGMP message transfer system according to claim 5 is characterized in that, described message receiving element:
Receiving under the situation that described IGMP joins message, judging whether send the user that described IGMP joins message adds, if not have adding then generate described user's outlet multicast forward table;
Receiving under the situation of described IGMP leave message, judge whether the user who sends described IGMP leave message is to leave fast, if then described user's information is deleted from described multicast forward table,, then whether really leave to described user's query if leave slowly.
7. IGMP message transfer system according to claim 5 is characterized in that, described message receiving element judges whether described IGMP apparatus for forwarding message plays igmp proxy under situation about receiving from the general polling message of described IGMP packet parsing device,
Under the situation that does not play igmp proxy, the general polling message that arrives to described at least one user terminal broadcast reception; And
Under the situation that has played igmp proxy, judge whether described IGMP packet parsing device has played described user's authentication function, if risen, then indicate described message merge cells to merge all users' of all groups IGMP message, if do not play authentication function or described authentication function at described IGMP apparatus for forwarding message itself, then indicate described message merge cells to merge a user's of each group message.
8. IGMP message transfer system according to claim 1 is characterized in that, described IGMP packet parsing device comprises:
Check and verification unit are used for checking the check of the described IGMP message that receives and whether correct;
The packet parsing unit is used under described check and correct situation the described IGMP message that receives being resolved and being handled;
The processing unit that joins message is used for the IGMP that parses joined message and handles; And
The leave message processing unit is used for the IGMP leave message that parses is handled.
9. IGMP message transfer system according to claim 1 is characterized in that, the described processing unit that joins message comprises:
Under described check and correct situation, judge whether described IGMP packet parsing device plays multicast user's authentication function,
Under the situation that has been judged as described multicast user's authentication function, judge whether to add multicast data flow, whether the port of judging described user place if permission adds is adding the middle existence of transmitting of multicast data flow, if there is no, then indicate second to transmit the multicast forward table that processing unit generates described user,, then write down and withdraw from if exist, if do not allow to add, then write down and withdraw from; And
Be judged as under the situation that does not play described multicast user's authentication function, judging whether to add described multicast data flow,, then indicating second to transmit processing unit generation multicast forward table,, then withdrawing from if add if do not add.
10. IGMP message transfer system according to claim 1, it is characterized in that, described leave message processing unit is under described check and correct situation, judge whether described IGMP packet parsing device plays multicast user's authentication function, under the situation that has been judged as described multicast user's authentication function, judge whether described user has added multicast data flow, if do not play described multicast user's authentication function then withdraw from, if described user has added multicast data flow, whether then judge in the multicast data flow that will leave exists other users identical with the port of described user place IGMP packet parsing device, if exist then write down and withdraw from, if there is no, then write described multicast forward table and delete described port.
11. according to each described IGMP message transfer system in the claim 1 to 10, it is characterized in that described IGMP apparatus for forwarding message is positioned at user's convergence device side, described IGMP packet parsing device is positioned at the Digital Subscriber Line Access Multiplexer side.
12. according to each described IGMP message transfer system in the claim 1 to 10, it is characterized in that described IGMP apparatus for forwarding message is positioned at the Digital Subscriber Line Access Multiplexer side, described IGMP packet parsing device is positioned at the Broadband Remote Access Server side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101507362A CN101170489A (en) | 2006-10-24 | 2006-10-24 | IGMP message transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101507362A CN101170489A (en) | 2006-10-24 | 2006-10-24 | IGMP message transmission system |
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| Publication Number | Publication Date |
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| CN101170489A true CN101170489A (en) | 2008-04-30 |
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| CNA2006101507362A Withdrawn CN101170489A (en) | 2006-10-24 | 2006-10-24 | IGMP message transmission system |
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| CN (1) | CN101170489A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102325034A (en) * | 2011-05-25 | 2012-01-18 | 太仓市同维电子有限公司 | Packet-broadcasting controlling system and control method based on IGMP/MLD multicast control protocol |
| CN101478542B (en) * | 2009-01-14 | 2012-05-30 | 华为技术有限公司 | Method and apparatus for processing packets |
| CN102752227A (en) * | 2012-08-02 | 2012-10-24 | 国家电网公司 | Network organizing method, site and system of power user electricity-consumption information collecting system |
| CN103379046A (en) * | 2012-04-20 | 2013-10-30 | 唐漫宇 | Method for improving message sending efficiency through IP message combining and splitting technology |
| WO2016062142A1 (en) * | 2014-10-24 | 2016-04-28 | 中兴通讯股份有限公司 | Method, apparatus and system for converged transmission of packets |
| CN107888503A (en) * | 2017-12-29 | 2018-04-06 | 新华三技术有限公司 | A kind of multicast message transmission method, device and customer terminal equipment |
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2006
- 2006-10-24 CN CNA2006101507362A patent/CN101170489A/en not_active Withdrawn
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101478542B (en) * | 2009-01-14 | 2012-05-30 | 华为技术有限公司 | Method and apparatus for processing packets |
| CN102325034A (en) * | 2011-05-25 | 2012-01-18 | 太仓市同维电子有限公司 | Packet-broadcasting controlling system and control method based on IGMP/MLD multicast control protocol |
| CN102325034B (en) * | 2011-05-25 | 2015-03-11 | 太仓市同维电子有限公司 | IGMP/MLD (Internet Group Management Protocol/Multicast Listener Discovery) multicast control protocol-based multicast control system and control method |
| CN103379046A (en) * | 2012-04-20 | 2013-10-30 | 唐漫宇 | Method for improving message sending efficiency through IP message combining and splitting technology |
| CN102752227A (en) * | 2012-08-02 | 2012-10-24 | 国家电网公司 | Network organizing method, site and system of power user electricity-consumption information collecting system |
| WO2016062142A1 (en) * | 2014-10-24 | 2016-04-28 | 中兴通讯股份有限公司 | Method, apparatus and system for converged transmission of packets |
| CN105577566A (en) * | 2014-10-24 | 2016-05-11 | 中兴通讯股份有限公司 | Message gathering transmission method, device and system |
| CN107888503A (en) * | 2017-12-29 | 2018-04-06 | 新华三技术有限公司 | A kind of multicast message transmission method, device and customer terminal equipment |
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