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Cognitive wireless sensor network MAC implementing method in combination of power control

A sensor network and cognitive wireless technology, applied in the field of wireless sensor networks, can solve problems such as multi-channel hidden terminals, achieve the effect of improving accuracy, improving detection accuracy, and avoiding hidden terminal problems

Inactive Publication Date: 2013-02-06
SHANGHAI JIAO TONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, as a combination of CR and WSN, CRSN technology has begun to be studied in depth, and an important challenge in the design of its MAC protocol is the problem of multi-channel hidden terminals.

Method used

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  • Cognitive wireless sensor network MAC implementing method in combination of power control
  • Cognitive wireless sensor network MAC implementing method in combination of power control
  • Cognitive wireless sensor network MAC implementing method in combination of power control

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Embodiment

[0061] The network contains 30 nodes, using one control channel and three data channels, the network topology is as follows figure 1 shown. Assume that the arrival of node data packets obeys the Poisson distribution and has the same arrival rate. Assuming the node's buffer is infinite, each packet is dropped after 5 attempts to send. In this embodiment, we assume that the nodes know the geographic location of the nodes within the maximum power coverage range, and adopt the RTS / CTS / ACTS negotiation manner.

[0062] The comparison scheme also uses the control channel. The node sends RTS / CTS / ACTS at the maximum power on the control channel for negotiation. The node listens to the control information of the neighbor node and records the status of the neighbor node, including the communication data channel selected by the neighbor node and the communication time. and data sending and receiving status. The difference is that the transmission power is not adjusted in the compariso...

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Abstract

The invention discloses a cognitive wireless sensor network MAC (media access control) implementing method in combination of power control, belonging to the technical field of wireless sensors. In the cognitive wireless sensor network MAC implementing method in combination of the power control, selection of a data channel is negotiated on a control channel through a pair of nodes of data to be transmitted, and in a channel selecting process, 1 / 2 maximum radius coverage including sending end conflict detection and receiving end conflict detection is combined with the conflict detection to implement the MAC. By the cognitive wireless sensor network MAC implementing method in combination of the power control, energy consumption can be effectively saved; the lifetime of the network can be prolonged; and the throughput of the network can be increased by increasing concurrent transmission amount. The cognitive wireless sensor network MAC implementing method aims to make each pair of communication nodes realize communication at a required minimum power.

Description

technical field [0001] The present invention relates to a method in the technical field of wireless sensor networks, in particular to a method for realizing MAC (Media Access Control) of a cognitive wireless sensor network combined with power control. Background technique [0002] In recent years, Wireless Sensor Network (WSN) has been widely used as a rapidly developing technology, but limited spectrum resources and traditional fixed spectrum allocation restrict the further development of WSN. Cognitive radio (CR) technology can enable unlicensed users to access spectrum not used by licensed users, and make full use of spectrum resources. Therefore, as a combination of CR and WSN, CRSN technology has begun to be studied in depth, and an important challenge in the design of its MAC protocol is the problem of multi-channel hidden terminals. [0003] At present, the multi-channel medium access protocols of wireless ad hoc networks are mainly divided into four types: 1) contro...

Claims

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Application Information

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IPC IPC(8): H04W24/00H04W28/26H04W74/08
CPCY02B60/50Y02D30/70
Inventor 张茜何晨蒋铃鸽田军吕超
Owner SHANGHAI JIAO TONG UNIV
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