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Physical layer network coding routing method and device

A technology of network coding and physical layer, which is applied in the field of physical layer network coding routing method and the device applying the physical layer network coding routing method, and can solve the problems of inability to save energy, few coding opportunities and discarding of physical layer network coding

Active Publication Date: 2017-02-15
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Interference information will be discarded by the node, and good energy saving cannot be achieved by using this coding method
Physical layer network coding, using the superposition characteristics of electromagnetic waves, regards the natural superposition of wireless electromagnetic waves in space as the coding process of signals, which is equivalent to the network coding process of the physical layer, and obtains the required information through decoding at the receiving end; the physical layer The encoding and decoding of network coding can only be implemented within the scope of the coding node and its front and back hops, resulting in fewer coding opportunities for physical layer network coding
Therefore, when the physical layer is used for encoding, it is difficult to perform encoding operations on multiple nodes, and effective energy-saving routing cannot be achieved.

Method used

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  • Physical layer network coding routing method and device

Examples

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no. 1 example

[0036] see figure 2 , is the application provided by the preferred embodiment of the present invention figure 2 A flow chart of a physical layer network coding routing device method for the physical layer network coding routing device shown. The following will be figure 2 The specific process shown will be described in detail.

[0037] Step S11, the source node sends a receiving mode switching request message to each encoding node on the routing path.

[0038] In this step S11, the source node sends a receive mode switch request message (Receive Mode Switch Request, RMSREQ) to each coding node on the routing path, so that the coding node sets the receiving mode to allow receiving superimposed signal mode, Wherein the source node is a node sending information or data. The routing path refers to the path through which data is transmitted from the source node to the destination node. Specifically, the source node creates an RMSREQ to the designated physical layer network ...

no. 2 example

[0052] Please refer to Figure 5 , which shows a flowchart of a physical layer network coding method provided by this embodiment. Different from the first embodiment, before step S11 in this embodiment, it also includes:

[0053] Step S101a, the source node sends a request message with the identification number of the destination node to the destination node through the intermediate node.

[0054]In this step S101a, the said request message with the identification number of the destination node can be sent by the source node simultaneously; or the active node sends one, and then the request message is copied and forwarded by the intermediate node, and finally The destination node is reached by different paths, that is, the destination node receives multiple request messages within a threshold time, and the request messages arriving after the threshold time will be discarded, so as to ensure that the best data transmission path can be selected. When multiple request messages ...

no. 3 example

[0062] Please refer to Figure 8 , which is a flow chart of a physical layer network coding routing method provided in this embodiment. The physical layer network coding routing method provided in this embodiment is different from the first embodiment and the second embodiment in that before step S11, it also includes:

[0063] Step S101b, modify the expected transmission values ​​of some links according to the expected transmission values ​​of the links.

[0064] In this step S101b, the source node is based on the expected transmission value of the wireless link between the request message on each of the collection paths from the up-hop node to the current node and the corresponding up-hop node of the destination node to the current node. For the expected transmission value of the link of the destination node, the expected transmission value of the link starting from the encoding node on the collection path is recorded as 0, the expected transmission value of the link ending...

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Abstract

The embodiment of the invention provides a physical layer network coding routing method and device, which relates to a network communication technology. The method comprises the steps that a source node sends a receive mode switching request message to each encoding node on a routing path, so that the encoding node is set to an allowed overlay signal receiving mode; the source node sends a mode switching request message to a previous hop node of each encoding node on the routing path, so that the previous hop node of the encoding node is set to a direct transmission mode; after the source node receives a first response message returned by each encoding node in the allowed overlay signal receiving mode and a second response message returned by the previous hop node of each encoding node in a direct transmission mode on the routing path, the source node transmits data to a target node through each encoding node on the routing path. The method ensures that the network coding of a physical layer is carried out in the multiterm range of the source node.

Description

technical field [0001] The present invention relates to the technical field of network communication, in particular to a physical layer network coding routing method and a device applying the physical layer network coding routing method. Background technique [0002] The wireless sensor network is composed of a large number of sensor nodes deployed in the monitoring area. It is a wireless, multi-hop, self-organizing network formed by wireless communication. Its purpose is to send the information of the sensing objects in the network coverage area to the observer. . People can directly perceive the objective world through wireless sensor networks, which expands the functions of existing networks and the ability of human beings to understand the world. In recent years, as the Internet of Things technology has been paid more and more attention by people, the wireless sensor network technology, one of the key technologies of the Internet of Things, has become a research hotspot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L12/721H04L12/761H04L45/16
CPCH04L1/0076H04L45/14H04L45/16
Inventor 邵星王翠香
Owner YANCHENG INST OF TECH