CN102355358B - Method and device for realizing multicast - Google Patents
Method and device for realizing multicast Download PDFInfo
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- CN102355358B CN102355358B CN201110225913XA CN201110225913A CN102355358B CN 102355358 B CN102355358 B CN 102355358B CN 201110225913X A CN201110225913X A CN 201110225913XA CN 201110225913 A CN201110225913 A CN 201110225913A CN 102355358 B CN102355358 B CN 102355358B
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Abstract
The invention discloses a method for realizing multicast. The method comprises the following steps of: while receiving an IGMP (Internet Group Management Protocol) Report message, storing the user VLAN (Virtual Local Area Network) and a multicast IP (Internet Protocol) address carried by the IGMP Report message, and a message receiving port and a multicast VLAN bound with the multicast IP address, in a manner of binding; and only transmitting an IGMP Query message to the corresponding VLAN on the established port when receiving an IGMP Leave message. Based on the same conception, the invention further provides a device which improves the utilization rate of the user side bandwidth and reduces network side bandwidth pressure with simple configuration.
Description
Technical field
The present invention relates to technical field of communication, particularly a kind of method and apparatus of multicast realization.
Background technology
Can realize between multicast source and user that by multicast point-to-multipoint network connects efficiently: multicast source transmits identical multicast packet to a plurality of users that belong to same multicast group simultaneously.But such data are at backbone network with by only transmission is a before the Access Network copy-point.After entering Access Network, multicast packet copies at copy-point, becomes many parts of identical data, sends to different recipients.
It is mutual that the realization of multicast depends on multicast protocol message (IGMP message).The user tells switch to wish to add and receive the information in certain specific multicast source by sending multicast protocol report message (IGMP Report message), and switch is initiatively learnt such request, and preserves the corresponding relation of user and multicast group; Equally, the user informs that by sending multicast protocol leave message (IGMP Leave message) switch will withdraw from particular multicast group.In order not influence other user to the reception of multicast packet, switch needs to send multicast protocol query message (IGMP Query message) to this multicast group after receiving the multicast leave message, to confirm whether also have other user in this multicast group.If no, switch will no longer be safeguarded corresponding user/multicast group corresponding relation, and the notice router does not send this multicast packet again.
Existing multicast leaves the realization of function all based on port, when switch receives IGMP Leave message from certain port, directly the corresponding relation of this port and multicast group is deleted from the multicast forwarding list item.When having only a user under the port, such processing policy naturally can conserve bandwidth.But, if disposed a plurality of VLAN under this port, and several multicast users being arranged under each VLAN, switch just need be confirmed inquiry to whether still having other multicast user under this port, this will cause user's side bandwidth waste inevitably.
Referring to Fig. 1, Fig. 1 is for realizing that based on port multicast leaves schematic configuration diagram.Among Fig. 1, switch 103 has disposed a plurality of VLAN at the port one (Port 1) of user's side respectively under Port n, and some (greater than 1) multicast user is arranged under each VLAN.Switch 103 links to each other with server 103 by router one 02.Suppose that User 1 has sent IGMP Leave message to switch, at this moment, switch is only known at its port and has been received this message for 1 mouthful, but message is specifically distinguished to be come out from the user among which VLAN.In this case, switch need all send a IGMP Query message to all users that 1 mouthful of all VLAN of port comprise, to determine whether also have other multicast user under this port in the service of the entrained multicast group of reception IGMP Leave message.If disposed n VLAN for 1 time at port, and have m user under each VLAN, it is individual that the number of the switch IGMPQuery message that need send is (m X n) so.Maximum VLAN can get 4094 usually, user's number can not be determined under the same VLAN, therefore, (m X n) may be a very big value, and the user may frequently add and leaves certain multicast group, so a large amount of IGMP Query messages has greatly been wasted the copy-point valuable bandwidth of user's side later on, run counter to the original intention of multicast protocol design.
As from the foregoing, the realization of leaving function of existing multicast has caused the waste of user's side bandwidth.
Summary of the invention
In view of this, the invention provides the method and apparatus that a kind of multicast is realized, under the simple situation of configuration, improved user's side bandwidth utilization.
For solving the problems of the technologies described above, technical scheme of the present invention is achieved in that
The method that a kind of multicast is realized, this method comprises: when receiving the multicast protocol report IGMP Report message that user's side sends, with the message sink mouth of described IGMP Report message, user's virtual LAN VLAN of carrying and multicast group IP address, and bind preservation with the M-VLAN of this multicast group IP address binding;
When receiving the IGMP Leave message that user's side sends, if in the information that described binding is preserved, find the message sink mouth of described IGMP Leave message, the user vlan that carries and multicast group IP address, and with the M-VLAN of this multicast group IP address binding, then generate all users in IGMP Query message and the user vlan scope on the message sink mouth of described IGMP Leave message and send the multicast protocol that institute asks to leave multicast group IP address and inquire about IGMP Query message.
Wherein, with the message sink mouth of described IGMP Report message, the VLAN that carries and multicast group IP address, and advance after the binding row preserves with the M-VLAN of this multicast group IP address binding, described method further comprises:
Obtain the multicast traffic stream that user's side needs from network side, and according to message sink mouth and user vlan that binding is preserved, described multicast traffic stream is copied and send to user's side relative users.
Described method further comprises:
If in default query timeout time and query timeout number of times, receive user's response of the IGMP Query message that sends, send this multicast data flow in the user vlan scope on the message sink mouth that then continues to preserve to this binding, otherwise, delete message sink mouth, user vlan, multicast group IP address and M-VLAN that described binding is preserved.
Described method further comprises: set up the multicast forwarding list item in advance, described message sink mouth, user vlan, multicast group IP address and M-VLAN binding are kept in the described multicast forwarding list item.
Described message sink mouth, the user vlan that carries and the multicast group IP address that finds the described IGMP Leave message that binding preserves, and with the method for the M-VLAN of this multicast group IP address binding be:
According to the message sink mouth of described IGMP Leave message, the user vlan that carries and multicast group IP address, and with the M-VLAN of this multicast group IP address binding, in described multicast forwarding list item, find corresponding message sink mouth, user vlan, multicast group IP address and M-VLAN that binding is preserved.
The equipment that a kind of multicast is realized, described equipment comprises: first receiving element, memory cell, second receiving element, processing unit and transmitting element;
Described first receiving element links to each other with described memory cell, is used for receiving the multicast protocol report IGMP Report message that user's side is sent;
Described memory cell, link to each other with described processing unit, be used for described first receiving element is received the message sink mouth of IGMP Report message, user's virtual LAN VLAN of carrying and multicast group IP address, and bind preservation with the M-VLAN of this address binding;
Described second receiving element links to each other with described processing unit, and the multicast protocol of sending for reception user side leaves IGMP Leave message;
Described processing unit, link to each other with described transmitting element, be used for the described IGMP Leave message according to described second receiving element reception, in the information that described memory cell binding is preserved, find the message sink mouth of described IGMP Leave message, the user vlan that carries and multicast group IP address, and during with the M-VLAN of this multicast group IP address binding, generate multicast protocol inquiry IGMP Query message;
All users send the multicast protocol that institute asks to leave multicast group IP address and inquire about IGMP Query message in described transmitting element, the IGMP Query message that described processing unit the is generated user vlan scope on the message sink mouth of described IGMPLeave message.
Wherein, described first receiving element links to each other with described processing unit, is further used for obtaining the multicast traffic stream that user's side needs from network side;
Described processing unit is further used for, and with the multicast traffic stream that described first receiving element obtains, message sink mouth and the user vlan preserved according to binding copy;
Described transmitting element is further used for the multicast traffic stream that described processing unit copies is sent to user's side relative users.
Described processing unit, if be further used for described second receiving element is not received described IGMP Query message in default query timeout time and query timeout number of times user's response, delete message sink mouth, user vlan, multicast group IP address and M-VLAN that described memory cell binding is preserved;
Described transmitting element, receive that in default query timeout time and query timeout number of times the user of the IGMP Query message that sends responds if be used for described second receiving element, then continue this multicast data flow of transmission in the user vlan scope on this message sink mouth.
Described memory cell is further used for setting up the multicast forwarding list item, and message sink mouth, user vlan, multicast group IP address and M-VLAN binding are kept in this multicast forwarding list item.
Described processing unit, be used for according to the message sink mouth of described IGMP Leave message, the user vlan that carries and multicast group IP address, and with the M-VLAN of this multicast group IP address binding, find corresponding message sink mouth, user vlan, multicast group IP address and M-VLAN that binding is preserved in the multicast forwarding list item in described memory cell.
In sum, the present invention when receiving IGMP Report message, user vlan and multicast group IP address that IGMP Report message is carried, and message sink mouth and bind preservation with the M-VLAN of this multicast ip address binding; When receiving IGMP Leave message, only the corresponding VLAN on the set port sends IGMP Query message and gets final product.Under the simple situation of configuration, improved user's side bandwidth utilization.
Description of drawings
Fig. 1 is for realizing that based on port multicast leaves schematic configuration diagram;
Fig. 2 realizes the method flow schematic diagram of multicast for the present invention;
Fig. 3 realizes the method flow schematic diagram of multicast for the specific embodiment of the invention;
Fig. 4 realizes the structural representation of the equipment of multicast for the present invention.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, scheme of the present invention is described in further detail.
Have multicast functionality as long as realize equipment of the present invention, as have switch, router, HUB, the epon etc. of multicast functionality.In the specific descriptions of method embodiment, be example with the switch for convenience, and this switch have multicast functionality hereinafter.
Referring to Fig. 2, Fig. 2 realizes the method flow schematic diagram of multicast for the present invention.Concrete steps are:
Step 201, when switch is received the IGMP Report message that user's side sends, with the message sink mouth of this IGMPReport message, user's virtual LAN VLAN of carrying and multicast group IP address, and bind preservation with the M-VLAN of this multicast group IP address binding.
With after the relevant information binding preservation, obtain the multicast traffic stream that user's side needs from network side, and according to message sink mouth and the user vlan preserved, the multicast traffic stream that obtains is copied and send to user's side relative users in this step.
Step 202, when switch is received the IGMP Leave message that user's side sends, if in the information that binding is preserved, find the message sink mouth of described IGMP Leave message, the user vlan that carries and multicast group IP address, and with the M-VLAN of this multicast group IP address binding, then generate all users in IGMPQuery message and the user vlan scope on the message sink mouth of IGMP Leave message send ask to leave the IGMP Query message of multicast group IP address.
In this step after user's side has sent IGMP Query message, if in default query timeout time and query timeout number of times, receive user's response of the IGMP Query message that sends, then continue to send in the user vlan scope on this message sink mouth this multicast data flow, otherwise, message sink mouth, user vlan, multicast group IP address and the M-VLAN of the correspondence that the deletion binding is preserved.
Below by specific embodiment, describe the whole process that multicast is realized in detail with reference to accompanying drawing.
Referring to Fig. 3, Fig. 3 realizes the method flow schematic diagram of multicast for the specific embodiment of the invention.Its concrete steps are:
Present multicast service mostly is paid service, must control user's access rights, is not obtaining before the authority, and the user can not visit specific multicast service.This restriction can also further expand to different multicast services providers, the multicast service that different providers provide is bound with different M-VLAN, the corresponding different multicast ip address of different multicast services, thereby isolate different multicast sources, improve manageability and the manageability of multicast service.
The realization of multicast functionality also depends on some miscellaneous functions, multicast forwarding list item ageing time for example, query timeout time, query timeout number of times etc.These parameters can preestablish according to practical application.
Switch is opened multicast functionality, and multicast task or process will be monitored the multicast protocol message.
Switch is received the multicast protocol message, and it is resolved.
The list item of setting up in this step is referring to table 1, and table 1 is multicast forwarding list item of the present invention.
| The message sink mouth | User vlan | Multicast group ip address | M-VLAN | Other |
Table 1
In the table 1, the message sink mouth is for receiving the port numbers of IGMP Report message; User vlan is the vlan number that IGMP Report message carries; Multicast group ip address is the multicast group ip address of configuration in the step 302; M-VLAN is the M-VLAN number of configuration in the step 302; Other are used for the user preserves out of Memory according to actual needs.
Be example with Fig. 1, suppose that user 1 is the multicast traffic stream of 239.1.1.2 to switch request multicast group ip address, send IGMP Report message to switch.And the user vlan at user 1 place is VLAN 1, the receiving port of Report message is port 1, the data flow of multicast group 239.1.1.2 is configured in VLAN 200, therefore to carry user vlan be VLAN1 to the IGMP Report message that sends to switch of user 1, multicast group IP address is 239.1.1.2, port port 1 by switch enters switch, finds the M-VLAN 200 of binding at switch by multicast group IP address.
Switch is received the IGMP Report message that user 1 sends, with packet parsing, user vlan and multicast group ip address that IGMP Report message is carried, and message sink mouth and that obtain at switch and the M-VLAN binding multicast ip address binding are stored in during multicast group transmits.Referring to table 2, table 2 is specific embodiment of the invention multicast forwarding list item.
Table 2
If the user of other VLAN sends IGMP Report message, each above-mentioned information that switch also carries IGMP Report message is stored in during multicast group that switch sets up transmits.For different M-VLAN or user port etc., multicast forwarding list item of the unified maintenance of switch also can be safeguarded different multicast forward tables respectively, according to convenient concrete enforcement of user.
The multicast forwarding list item for this multicast list arranges timer, records corresponding multicast forwarding-table item ageing time after setting up.In ageing time, if receive the IGMP Report message that user's side is sent, and the message sink mouth of this IGMP Report message, the user vlan that carries and multicast group IP address, and with M-VLAN bound preservation in the multicast forwarding list item of this multicast ip address binding, then upgrade the ageing time of corresponding multicast forwarding-table item; Otherwise, delete corresponding multicast forwarding-table item.
After corresponding information binding was stored in the multicast forwarding list item, switch sent the IGMPReport message to network side, the multicast traffic stream of asking its user to need.Under the situation of the same multicast group of a plurality of user applies, switch can also be enabled the proxy function, and a plurality of Report messages are merged processing.
Step 309 is received the multicast traffic stream of network side transmitted, according to multicast forwarding list item duplicated multicast data flow and send to relative users.Execution in step 314.
The foundation that multicast traffic stream copies is message sink mouth and the user vlan that binding is preserved in the multicast forwarding list item.Be example with Fig. 1, the multicast traffic stream of user 1 request is copied and send to each user under the VLAN1 on the port1.
Step 311, if switch finds corresponding multicast forwarding list item, the multicast group IP address of leaving according to message sink mouth, user vlan and IGMP Leave message request generates and sends IGMP Query message.
When switch is received IGMP Leave message, user vlan and the multicast group IP address that to carry according to message sink mouth and IGMP Leave message, and with the M-VLAN of this multicast group IP address binding, in the multicast forwarding list item, search, if find the multicast forwarding list item existence that the information correspondence is preserved in above-mentioned binding, then generate IGMP Query message, and in the user vlan scope of the correspondence on the message sink mouth of this IGMP Leave message all users send ask to leave the IGMP Query message of multicast group IP address; For example, the Report message sink mouth in the multicast forwarding list item is port1, and corresponding user vlan is VLAN1, then sends in the VLAN1 scope of this IGMP Query message on the port1 port.
Whether the user response inquiry is arranged in the user vlan scope according to the Report message sink mouth correspondence in the multicast forwarding list item, judge the user who whether still has this multicast group in this scope.
In default query timeout time and query timeout number of times, switch is not received user response query message in the user vlan scope corresponding on the Report message sink mouth in the multicast forwarding list item, then deletes this corresponding multicast forwarding list item.And the informing network side, user vlan and the corresponding multicast of this multicast forwarding list item middle port correspondence are no longer handled.For example, the Report message sink mouth in the multicast forwarding list item is port1, and corresponding user vlan is VLAN1, and multicast group ip address is 239.1.1.2, and then no longer to handle the multicast that port1 goes up VLAN1 be the message of 239.1.1.2 to the informing network side.
Step 314 finishes.
Based on same inventive concept, the present invention also proposes a kind of equipment of realizing multicast.This equipment has multicast functionality.Referring to Fig. 4, Fig. 4 realizes the structural representation of the equipment of multicast for the present invention.This equipment comprises: first receiving element 401, memory cell 402, second receiving element 403, processing unit 404 and transmitting element 405.
First receiving element 401 links to each other with memory cell 402, is used for receiving the IGMPReport message that user's side is sent.
Memory cell 402, link to each other with processing unit 404, be used for first receiving element 401 is received the message sink mouth of IGMPReport message, user's virtual LAN VLAN of carrying and multicast group IP address, and bind preservation with the M-VLAN of this address binding.
Second receiving element 403 links to each other with processing unit 404, and the multicast protocol of sending for reception user side leaves IGMP Leave message.
Processing unit 404, link to each other with transmitting element 405, be used for the IGMP Leave message according to 403 receptions of second receiving element, in the information that memory cell 402 bindings are preserved, find the message sink mouth of described IGMPLeave message, the user vlan that carries and multicast group IP address, and during with the M-VLAN of this multicast group IP address binding, generate multicast protocol inquiry IGMP Query message.
In transmitting element 405, the IGMP Query message that processing unit 404 the is generated user vlan scope on the message sink mouth of IGMP Leave message all users send ask to leave the IGMP Query message of multicast group IP address.
Preferably,
First receiving element 401 links to each other with processing unit 404, is further used for obtaining the multicast traffic stream that user's side needs from network side.
Processing unit 404 is further used for, and the multicast traffic stream with first receiving element 401 obtains copies according to message sink mouth and the user vlan preserved.
Transmitting element 405 is further used for the multicast traffic stream that processing unit 404 copies is sent to user's side relative users.
Preferably,
Processing unit 404, if be further used for second receiving element 403 is not received IGMP Query message in default query timeout time and query timeout number of times user's response, message sink mouth, user vlan, multicast group IP address and the M-VLAN of the correspondence that 402 bindings of deletion memory cell are preserved.
Transmitting element 405 receives that in default query timeout time and query timeout number of times the user of the IGMP Query message that sends responds if be used for second receiving element 403, then continues this multicast data flow of transmission in the user vlan scope on this message sink mouth.
Preferably,
Memory cell 402 is further used for setting up the multicast forwarding list item, and message sink mouth, user vlan, multicast group IP address and M-VLAN binding are kept in this multicast forwarding list item.
Preferably,
Processing unit 404, be used for according to the message sink mouth of IGMP Leave message, the user vlan that carries and multicast group IP address, and with the M-VLAN of this multicast group IP address binding, find corresponding message sink mouth, user vlan, multicast group IP address and the M-VLAN of preservation in the multicast forwarding list item in memory cell 402.
In sum, when the present invention receives IGMP Report message at the equipment equipment with multicast functionality, need not extra manual configuration, the M-VLAN that message sink mouth, user vlan, multicast group IP address and this address are bound is stored in the multicast forwarding list item.When equipment obtains the multicast traffic stream of user's side request, copy and send to user's side relative users according to the multicast forwarding list item, therefore, the multicast packet copy-point is down to equipment from router, reduce the Access Network burden.When equipment equipment is received IGMP leave message, send IGMP Query message according to the multicast forwarding list item, distinguish the user with littler granularity, dwindle IGMP Query message range of transmission, under the simple situation of configuration, improved user's side bandwidth utilization.
The above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the method that realizes of a multicast, this method is applied to comprise in the network system of the equipment with multicast functionality that this equipment disposes a plurality of virtual LAN VLAN under each port of user's side, and has under each VLAN greater than a multicast user, it is characterized in that described method comprises:
When receiving the multicast protocol report IGMP Report message that user's side sends, with the message sink mouth of described IGMP Report message, user's virtual LAN VLAN of carrying and multicast group IP address, and bind preservation with the M-VLAN of this multicast group IP address binding;
Receive when multicast that user's side is sent leaves IGMP Leave message, if in the information that described binding is preserved, find the message sink mouth of described IGMP Leave message, the user vlan that carries and multicast group IP address, and with the M-VLAN of this multicast group IP address binding, then generate all users in IGMP Query message and the user vlan scope on the message sink mouth of described IGMP Leave message and send the multicast protocol that institute asks to leave multicast group IP address and inquire about IGMP Query message.
2. method according to claim 1, it is characterized in that, with the message sink mouth of described IGMP Report message, the VLAN that carries and multicast group IP address, and bind after the preservation with the M-VLAN of this multicast group IP address binding, described method further comprises:
Obtain the multicast traffic stream that user's side needs from network side, and according to message sink mouth and user vlan that binding is preserved, described multicast traffic stream is copied and send to user's side relative users.
3. method according to claim 1 and 2 is characterized in that, after user's side sent IGMP Query message, described method further comprised:
If in default query timeout time and query timeout number of times, receive user's response of the IGMP Query message that sends, send this multicast data flow in the user vlan scope on the message sink mouth that then continues to preserve to this binding, otherwise, delete message sink mouth, user vlan, multicast group IP address and M-VLAN that described binding is preserved.
4. method according to claim 3, it is characterized in that, described method further comprises: set up the multicast forwarding list item in advance, described message sink mouth, user vlan, multicast group IP address and M-VLAN binding are kept in the described multicast forwarding list item.
5. method according to claim 4, it is characterized in that, described message sink mouth, the user vlan that carries and the multicast group IP address that finds the described IGMP Leave message that binding preserves, and with the method for the M-VLAN of this multicast group IP address binding be:
According to the message sink mouth of described IGMP Leave message, the user vlan that carries and multicast group IP address, and with the M-VLAN of this multicast group IP address binding, in described multicast forwarding list item, find corresponding message sink mouth, user vlan, multicast group IP address and M-VLAN that binding is preserved.
6. the equipment realized of a multicast, this equipment disposes a plurality of virtual LAN VLAN under each port of user's side, and have under each VLAN greater than a multicast user, it is characterized in that described equipment comprises: first receiving element, memory cell, second receiving element, processing unit and transmitting element;
Described first receiving element links to each other with described memory cell, is used for receiving the multicast protocol report IGMP Report message that user's side is sent;
Described memory cell, link to each other with described processing unit, be used for described first receiving element is received the message sink mouth of IGMP Report message, user's virtual LAN VLAN of carrying and multicast group IP address, and bind preservation with the M-VLAN of this address binding;
Described second receiving element links to each other with described processing unit, and the multicast protocol of sending for reception user side leaves IGMP Leave message;
Described processing unit, link to each other with described transmitting element, be used for the described IGMP Leave message according to described second receiving element reception, in the information that described memory cell binding is preserved, find the message sink mouth of described IGMP Leave message, the user vlan that carries and multicast group IP address, and during with the M-VLAN of this multicast group IP address binding, generate multicast protocol inquiry IGMP Query message;
All users send the multicast protocol that institute asks to leave multicast group IP address and inquire about IGMP Query message in described transmitting element, the IGMP Query message that described processing unit the is generated user vlan scope on the message sink mouth of described IGMP Leave message.
7. equipment according to claim 6 is characterized in that,
Described first receiving element links to each other with described processing unit, is further used for obtaining the multicast traffic stream that user's side needs from network side;
Described processing unit is further used for, and with the multicast traffic stream that described first receiving element obtains, message sink mouth and the user vlan preserved according to binding copy;
Described transmitting element is further used for the multicast traffic stream that described processing unit copies is sent to user's side relative users.
8. according to claim 6 or 7 described equipment, it is characterized in that,
Described processing unit, if be further used for described second receiving element is not received described IGMP Query message in default query timeout time and query timeout number of times user's response, message sink mouth, user vlan, multicast group IP address and M-VLAN that the binding of deletion memory cell is preserved;
Described transmitting element, receive that in default query timeout time and query timeout number of times the user of the IGMP Query message that sends responds if be used for described second receiving element, then continue this multicast data flow of transmission in the user vlan scope on this message sink mouth.
9. equipment according to claim 8 is characterized in that,
Described memory cell is further used for setting up the multicast forwarding list item, and message sink mouth, user vlan, multicast group IP address and M-VLAN binding are kept in this multicast forwarding list item.
10. equipment according to claim 9 is characterized in that,
Described processing unit, be used for according to the message sink mouth of described IGMP Leave message, the user vlan that carries and multicast group IP address, and with the M-VLAN of this multicast group IP address binding, find corresponding message sink mouth, user vlan, multicast group IP address and M-VLAN that binding is preserved in the multicast forwarding list item in described memory cell.
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| CN103259675B (en) * | 2013-04-11 | 2016-04-13 | 深圳市共进电子股份有限公司 | The implementation method that a kind of interactive network TV service message is isolated between port |
| CN104079418B (en) * | 2014-05-28 | 2018-07-31 | 上海斐讯数据通信技术有限公司 | A kind of processing method of simplified multicast message |
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