Non-rate LT coding-based method for distributed network channel coding of wireless sensor network

A technology of wireless sensor network and wireless sensor network, which is applied in the field of wireless sensor network to achieve the effect of avoiding redundant transmission and saving energy

Inactive Publication Date: 2012-02-15
林子怀 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the network coding disclosed in the prior art can only be realized at the physical layer

Method used

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  • Non-rate LT coding-based method for distributed network channel coding of wireless sensor network
  • Non-rate LT coding-based method for distributed network channel coding of wireless sensor network

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Embodiment Construction

[0028] The invention will be further described below through specific embodiments.

[0029] Now suppose there are M sensor nodes in a wireless sensor network to communicate with a destination node. Assume that K sensor nodes among the M sensor nodes want to transmit data as source nodes, and M>K. The other M-K sensor nodes have no data transmission and act as relay nodes. Data transfer from source node to destination node is divided into two phases. In the first stage, all source nodes broadcast their respective data to the network, and the header of each data packet contains the address of the source node from which it came. All channels from the source node to the destination node are orthogonal, so that the channels will not cause mutual interference. At the same time, the relay node listens to the surrounding source nodes.

[0030] Unlike the prior art which assumes an ideal absolutely error-free channel, the present invention considers that all channels (from the sour...

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Abstract

The invention discloses a non-rate LT coding-based method for distributed network channel coding of a wireless sensor network. According to the method, a non-rate LT graphic coding is utilized to map a topological structure diagram of a wireless sensor network to a graph structure in the graphic coding; a data transmission process of the whole wireless sensor network is used as a coding process of the graphic coding; linear network coding is executed at each relay node; decoding is carried out on the wireless sensor network at a destination node, wherein the wireless sensor network has been mapped on the graphic coding; and then the relay nodes transmit data to the destination node one by one in an on-demand mode. Meanwhile, an upper limit of a theoretical analysis of a system performance of the wireless sensor network in a rayleigh fading channel is derived, wherein the upper limit is based on finite-length LT codes.

Description

technical field [0001] The invention relates to the field of wireless sensor networks, in particular to a distributed network channel coding method for wireless sensor networks based on rateless LT coding. Background technique [0002] With the rise of the Internet of Things, the research on wireless sensor network technology has attracted more and more attention of researchers. A wireless sensor network usually includes a large number of low-cost, low-power wireless sensor nodes, some aggregation nodes, and some destination nodes. There are many applications of sensor networks, such as monitoring, monitoring, tracking, positioning, etc. In these applications, sensor nodes usually cooperate with each other in a multi-hop (two-hop) manner. In a traditional sensor network, packets of information are exchanged through routing. In the routing switching algorithm, the relay node between the source node and the destination node simply stores and forwards the received data packe...

Claims

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Application Information

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IPC IPC(8): H04L1/00
Inventor 林子怀刘扬
Owner 林子怀
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