Multi-relay cooperative cognitive underwater acoustic system relay selection and power optimization method

A power optimization, underwater acoustic technology, applied in power management, transmission systems, radio transmission systems, etc., can solve the problems of difficult long-term continuous cooperation, the death of a few monitoring nodes in local sea areas, and the high cost of node maintenance and replacement, to alleviate the frequency spectrum. The effect of resource constraints, improving the efficiency of multi-relay perception, and combating the effects of long delay and multipath fading

Active Publication Date: 2017-07-14
YANSHAN UNIV
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Problems solved by technology

At the same time, all underwater nodes are powered by batteries, and the cost of node maintenance and replacement is high. In terms of relay selection, if only relays with good channel status are selected to participate in coo

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  • Multi-relay cooperative cognitive underwater acoustic system relay selection and power optimization method
  • Multi-relay cooperative cognitive underwater acoustic system relay selection and power optimization method
  • Multi-relay cooperative cognitive underwater acoustic system relay selection and power optimization method

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[0025] The present invention will be further described below in conjunction with accompanying drawing:

[0026] like figure 1As shown, at least one authorized primary user base station (Primary BaseStation) is included in the method of the present invention, a water surface cognitive base station (CA Base Station) communicating with satellites, K underwater cognitive monitoring nodes (CAUser), K= 1, 2, 3, ...;; Each node is responsible for the collection and monitoring of marine environmental data within a fixed sea area, and can be used as a transmitting node to transmit data, or as a relay node to participate in cooperative communication; during the transmission process, the relay node adopts Half-duplex communication mode, cooperative mode adopts decoding and forwarding (DF); in the first time slot, the i-th monitoring node sends data signal x i to the relay node; in the second time slot, the relay decodes the signal after successful reception, and then forwards the re-enc...

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Abstract

The invention discloses a multi-relay cooperative cognitive underwater acoustic system relay selection and power optimization method, which is characterized in that a relay trust factor is built to evaluate the relay performing in allusion to conditions of spectrum resource shortage, channel fading and severe time delay in underwater acoustic communication by adopting a relay trust factor proportion weighted cooperative sensing method and a DF forwarding protocol based underwater acoustic multi-relay selection and power optimization method, relays participate in cooperative sensing in a mode of proportion weighting, and the sensing accuracy is effectively improved. Meanwhile, network interference limitations and residual energy are brought into a utility function in a multi-relay cooperative network, relay selection and power optimization are performed based on a genetic algorithm from the perspectives of power optimization and residual energy consumption, and the network is enabled to be more balanced in energy consumption.

Description

technical field [0001] The invention relates to the technical field of underwater acoustic communication, in particular to a design method for cognitive underwater acoustic multi-relay cooperative joint optimization based on decoding and forwarding (DF). Background technique [0002] In recent years, due to the increasing intensity of military applications and marine resource development, research on underwater acoustic communication technology has attracted more and more attention. Different from the radio communication environment on land, the underwater acoustic channel presents severe frequency selective fading characteristics, which makes the spectrum resources available for underwater acoustic communication very limited, so cognitive underwater acoustic communication technology emerges as the times require. On the premise of not interfering with primary users, cognitive nodes can use licensed spectrum for communication, which greatly improves spectrum utilization effic...

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Application Information

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IPC IPC(8): H04B7/155H04B7/185H04B13/02H04W40/22H04W52/02H04W88/08
CPCH04B7/155H04B7/15592H04B13/02H04W40/22H04W52/0203H04W88/08Y02D30/70
Inventor 李鑫滨李瑞建闫磊韩松闫敬
Owner YANSHAN UNIV
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