Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

System and method of delivering multicast service system on mobile host computers

A mobile host, multicast service technology, applied in the field of network communication, can solve problems such as excessive packet loss, excessive multicast group multicast distribution tree overhead, tunnel aggregation, etc., to optimize transmission paths and avoid network communication bottlenecks , to avoid the effect of tunnel aggregation

Inactive Publication Date: 2006-07-26
HUAWEI TECH CO LTD
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 1. Because the triangular route is used, it is not the optimal route, so there must be a disadvantage of large link overhead
Especially when the mobile node is far away from the home network and joins the local multicast group of the foreign link, the additional overhead introduced by this scheme will be very significant
[0009] 2. Since the home agent forwards multicast packets for each mobile node through the tunnel, it is done in the form of unicast, so when the home agent has multiple corresponding mobile nodes on the same foreign link, each A mobile node will establish a tunnel to this home agent, and each mobile node receives multiple duplicate multicast packets through different tunnels, which will cause "tunnel aggregation problem"
[0010] 3. Home Agents Become "Points of Failure"
[0013] 1. When the mobile node is a multicast receiver and handover occurs, due to the rejoining of the multicast group and the update of the multicast forwarding tree, the handover delay is relatively large, which will cause more multicast packet loss and affect the group broadcast application reliability
[0014] 2. When the mobile node is used as a multicast source, it can only be applied to the shared tree
So it will introduce a lot of protocol overhead
[0015] 3. Due to the different delays of receiving multicast packets in each subnet, the unique "synchronization loss" problem in the mobile environment occurs
This will inevitably add new overhead
[0020] 3. Multicast packet loss caused by DMSP reselection
[0023] 1. The multicast agent is close to the interface of the multicast backbone network. If it fails, the affected area is relatively large
[0024] 2. When the multicast tree is reconstructed, the multicast service is interrupted for a long time
[0025] To sum up, in mobile multicast, every time a node switches between subnets due to movement, it will rejoin the multicast tree as a new member, which will lead to frequent updates and replays of the multicast tree. This structure brings too much overhead to the management of multicast groups and the maintenance of multicast distribution trees, which increases the burden on the network, and also makes the communication recovery time of mobile nodes longer, which seriously affects the communication quality.
Although many schemes have been proposed, these schemes generally have many defects including triangular routing, tunnel aggregation, long switching delay, excessive packet loss, etc.

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • System and method of delivering multicast service system on mobile host computers
  • System and method of delivering multicast service system on mobile host computers
  • System and method of delivering multicast service system on mobile host computers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0073] The core idea of ​​the present invention is a compromise between the shortest forwarding path and the frequent reconstruction of the multicast tree, so that the multicast packet can always be forwarded with a "close" optimal path, and there is no need to spend too much on maintaining the multicast tree s expenses. Make full use of network resources and solve the tunnel aggregation problem of bidirectional tunnels at the same time.

[0074] In the present invention, it involves the concept of dynamic multicast agent DMA and tunnel state TunnelState introduced by the present invention, as well as the concept of existing multicast subnet agent MSA. The DMA joins the multicast group instead of the mobile host, and sends the multicast packet to the MSA of the current foreign subnet of the mobile host in tunnel mode, thereby reducing the number of times to reconstruct the multicast tree due to the change of the mobile host location.

[0075] In the present invention, each mo...

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

PUM

No PUM Login to View More

Abstract

This invention relates to mobile host machine group business system and its method, which has each host machine relative to one dynamic broadcast agent and the said agent needs mobile host process through path to realize switch, wherein, if the host dynamic agent switched to the current sub-net MSA to be directly added into set to optimize the transmission path. This invention can reduce host mobile complex restriction and avoid agent DMA and outside MSA forming channel to optimize set transmission path.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a system and a method for a mobile host to carry out multicast services. Background technique [0002] Multicast technology is a routing technology that optimizes the use of network bandwidth. Multicast technology allows IP data streams to be sent from one source or multiple sources to multiple destinations. The use of multicast technology is beneficial to reduce backbone network traffic, so IP multicast has always been a hot issue in the field of Internet research. At present, in the mobile environment, it is urgent to combine IP multicast and mobile IP technology to provide multicast services for mobile nodes (ie, mobile hosts), that is, to realize mobile IP multicast technology. [0003] For mobile IP multicast, the multicast protocol not only needs to manage the multicast group members, establish and maintain the multicast forwarding tree, but also solve the d...

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

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/54H04W80/04H04W88/14
CPCH04L12/18H04W80/04H04W88/14
Inventor 沈波张宏科刘玉兰刘恩慧
Owner HUAWEI TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products