Method and apparatus for controlling multi-point transmitaion in ether metropolitan network

An Ethernet and multi-point technology, applied in the branch office to provide special service devices, transmission systems, digital transmission systems, etc., can solve problems such as bandwidth efficiency issues
CN1424833AInactive Publication Date: 2003-06-18QUALCOMM INC
0 Cites 15 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
QUALCOMM INC
Publication Date
2003-06-18
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

Method and apparatuses for directing multicast traffic in an Ethernet network include sending a multicast message upstream to a metro access node, performing IGMP snooping at the metro access node and assigning a multicast VLAN tag to the multicast message, performing IGMP snooping at an Ethernet switch disposed upstream to determine each port used for a corresponding multicast group address and multicast VLAN tag associated with the multicast group address, receiving the multicast message at an access server or edge router and sending the multicast message including the multicast group address and the multicast VLAN tag, downstream to a port based on that information, thereby avoiding duplication of the multicast message to another port other than the port associated with the multicast VLAN tag.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The present invention relates to preventing occurrence of Duplication of multicast transmissions, controlling multicast transmissions for different service providers and improving bandwidth efficiency. Background technique

[0002] All types of Local Area Networks (LANs) conform to the IEEE 802 standard and can be connected together with a Media Access Control (MAC) bridge. Various LANs can be grouped together to form a virtual LAN (VLAN). A VLAN group consists of a logical workgroup including users that can be physically separated from each other. The IEEE 802.1Q standard defines the operation of VLAN bridges, which allow the definition, operation and management of VLAN topologies within bridged LAN infrastructures. VLANs provide privacy and security for members of workgroups, and provide broadcast domains so that broadcast transmissions are kept within the VLAN.

[0003] Through E-MAN, users connect to the Internet or corporate environment at hig...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More