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Method and node enhancing multicast transmission efficiency based on random network code

A random network coding and multicast transmission technology, applied in the field of source nodes and sink nodes, can solve the problems of reducing multicast transmission efficiency and inability to adapt to network changes, and achieve the effect of improving multicast transmission efficiency

Inactive Publication Date: 2011-08-24
HUAWEI TECH CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the prior art, once the total number of generational continuous transmissions or the duration of generational continuous transmissions are determined according to the minimum value of the maximum flow from the source node to each sink node obtained in the construction of the multicast logical sub-topology, the total number of generational continuous transmissions or the generational continuous transmission The duration will no longer change, which cannot adapt to network changes and reduces the efficiency of multicast transmission

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  • Method and node enhancing multicast transmission efficiency based on random network code
  • Method and node enhancing multicast transmission efficiency based on random network code
  • Method and node enhancing multicast transmission efficiency based on random network code

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Embodiment 2

[0089] Figure 5 The flow chart for improving the efficiency of multicast transmission based on random network coding provided by Embodiment 2 of the present invention, as shown in Figure 5 As shown, the specific steps are as follows:

[0090] Steps 501-511 are the same as steps 401-411.

[0091] Step 512: The source node receives the control signaling sent by the sink node, and judges whether the control signaling is an information insufficient signaling, and if so, executes step 513; otherwise, executes step 514.

[0092] Step 513: The source node multiplies the encoding vector carried in the insufficient information signaling and the encoding vector required for successful decoding by the original data block, puts each obtained data block into a multicast packet, and passes each multicast packet through The unicast routing mechanism is sent to the sink node.

[0093] Step 514: The source node judges whether the generation number in the control signaling is the same as i...

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Abstract

The invention discloses a method for improving multicast transmission efficiency based on random network coding, a source node and a sink node. The source node receives a decoding result signaling that each sink node decodes the first generation of a multicast grouping. The decoding result signaling can be defined as a successful decoding signaling when decoding is made successfully or an unsuccessful decoding signaling when decoding is made unsuccessfully; the source node adjusts a generation sending continuous width of the multicast grouping according to the decoding result signaling. The invention ensures that the source node can know the network condition of the multicast transmission immediately, thereby adjusting the generation sending continuous width of the multicast grouping and improving the transmission efficiency.

Description

technical field [0001] The invention relates to the technical field of network coding, in particular to a method for improving the efficiency of multicast transmission based on random network coding, and a source node and a sink node. Background technique [0002] The so-called network coding means that the nodes in the network not only have the ability to store and forward data packets, but also can encode information, so as to greatly improve the throughput and bandwidth utilization of the network when executing multicast applications. [0003] figure 1 A network topology diagram that improves network throughput through network coding is given, such as figure 1 As shown, assume that the transmission rate of all lines in the figure is 1 bit / unit time, and node S wants to use the network to multicast information to node Y and node Z at the same time. Assume that within a certain unit of time, S sends bits b to T and U respectively 1 and b 2 , if each node has only store-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/56H04L45/16
Inventor 涂晓东刘晗冯莱利牛长喜张庚王少勇
Owner HUAWEI TECH CO LTD
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