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A MAC method based on cdma power control for underwater acoustic sensor networks

An underwater acoustic sensor and power control technology, applied in power management, transmission system, wireless communication, etc., can solve problems such as lowering communication quality, and achieve high network throughput and high transmission success rate

Active Publication Date: 2020-05-22
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the underwater acoustic sensor network, as the number of sensor nodes increases, the "near-far effect" associated with CDMA will seriously reduce the communication quality

Method used

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  • A MAC method based on cdma power control for underwater acoustic sensor networks
  • A MAC method based on cdma power control for underwater acoustic sensor networks
  • A MAC method based on cdma power control for underwater acoustic sensor networks

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Embodiment

[0046] The present invention provides a kind of MAC method based on CDMA power control that is applicable to underwater acoustic sensor network, and the steps are as follows:

[0047] S1, sensor node random access channel;

[0048] What the present invention adopts is the topology structure of the star aggregation network, that is, there are a plurality of sensor nodes and a convergence node to send data packets at the bottom of the water, such as figure 1 As shown, the sink node is located in the center of the network distribution area, the sensor nodes in the network are randomly distributed around the sink node, and the generation of sensor node data packets satisfies the Poisson distribution;

[0049] S2. The sink node measures the background noise when the channel is idle, and then uses a distributed power control algorithm based on SINR balance according to the number of all sensor nodes at the bottom of the water and their initial transmission power, and uses an iterati...

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Abstract

The invention discloses a CDMA power control-based MAC protocol applicable to an underwater acoustic sensor network. according to the method, a CDMA is combined with a non-retransmission ALOHA protocol; and through utilization of a distributed power control algorithm based on signal to interference plus noise ratio balance and an interaction method, the optimal transmitting power of each sensor node is calculated, thereby controlling the transmitting power of a transmitting end and overcoming a far and near effect. Moreover, according to the method, a calculation method for a signal to interference plus noise ratio of a receiving end is improved, thereby obtaining a relatively precise simulation result. The receiving end is allowed to receive a plurality of data packets sent by different sensor nodes and the far and near effect is overcome by controlling the transmitting power, so channel resources are utilized fully. Compared with other protocols, the CDMA power control-based MAC protocol has the advantages that higher network throughput and a higher transmitting success rate are achieved particularly in a scene with many sensor nodes and relatively high traffic.

Description

technical field [0001] The invention relates to the field of underwater acoustic sensor networks, in particular to a MAC method based on CDMA power control suitable for underwater acoustic sensor networks. Background technique [0002] The ocean contains extremely rich oil and gas, minerals, and biological resources, and it is also the main channel for global transportation. For more than a century, various countries have gradually increased their efforts in ocean research. As the pace of human development of the ocean gradually accelerates, the application of underwater acoustic sensor networks has become increasingly widespread, in environmental monitoring, early warning systems, distributed tactical surveillance and reconnaissance, auxiliary navigation, maritime exploration, marine data sampling and valuable underwater Mineral exploration and other aspects play a major role. However, since the underwater acoustic channel is an extremely complex random time-space-frequenc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B13/02H04W52/04
CPCH04B13/02H04W52/04
Inventor 季飞宋玲娜陈芳炯余华
Owner SOUTH CHINA UNIV OF TECH
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