Sensor network data distribution forward selection method based on network coding

A technology for data distribution and network coding, applied in transmission systems, digital transmission systems, and error prevention/detection using return channels.

Active Publication Date: 2014-05-07
ZHEJIANG UNIV
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  • Summary
  • Abstract
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Problems solved by technology

A lot of existing work is to study reliable and efficient data distribution protocols, one of which is to encode the data to be sent, so that the data packets sent each time are useful to most nodes, and the nodes receive a certain amount The encoded data packet can be decoded to obtain the original data packet. Compared with the previous method wit

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  • Sensor network data distribution forward selection method based on network coding
  • Sensor network data distribution forward selection method based on network coding
  • Sensor network data distribution forward selection method based on network coding

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Embodiment Construction

[0038] The method of the invention can be implemented in the embedded network operating system TinyOS2.1, and can also be implemented in other sensing operating systems such as contiki.

[0039] In the following, the embedded network operating system TinyOS2.1 is used as the realization system of the method of the present invention, and the method of the present invention is described in detail with specific examples in conjunction with the accompanying drawings. Assume that the serial number of the data page currently being transmitted is P (hereinafter referred to as data page P), and the size of the data page is 10, which means that each data page consists of 10 encoded data packets.

[0040] Step 1. After receiving the current round of encoded data packets, the receiving end node in the sensor network counts the missing encoded data packets. The missing numbers of encoded data packets of nodes C, D, and E are as follows: figure 1 Indicated by the numbers in the middle rect...

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Abstract

The invention discloses a sensor network data distribution forward selection method based on network coding. The average effective reception amount of all coded data packets to be sent is calculated by a forward node, and according to the average effective reception amount, the sending of the requested coded data packets is started after a waiting time, wherein the average effective reception amount is larger, the waiting time is shorter. According to the method of the invention, compared with the prior art, the link correlation influences that are in objective existence are taken into account, so forward selection can be performed more accurately.

Description

technical field [0001] The invention belongs to the field of wireless network and sensor network, and relates to a forwarding selection method in data distribution based on network coding in the sensor network. Background technique [0002] With the continuous development of Internet of Things technology, wireless sensor network technology has developed rapidly and has been widely used in military reconnaissance, public safety, intelligent transportation, environmental detection, medical care and many other fields. A typical wireless sensor network consists of a large number of miniature sensor nodes, which are deployed in an environment that is unmanned or requires frequent human participation, and forms a multi-hop network system automatically through wireless self-organizing networks through topology control and network protocols. Wireless sensor networks enable people to obtain a large amount of detailed and reliable information in real time at any time, place and enviro...

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Application Information

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IPC IPC(8): H04L1/00H04L1/12
Inventor 卜佳俊董玮陈纯赵志为王永刚
Owner ZHEJIANG UNIV
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