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Cross-layer Routing Method Based on Energy Optimization and Network Lifetime in Cognitive Radio Cellular Networks

A cognitive radio and cellular network technology, which is applied in the field of routing in cognitive radio networks, can solve problems such as node failure, network performance degradation, and network failure, and achieve the effects of persistent energy, promoting fairness, and powerful computing capabilities

Active Publication Date: 2016-06-29
COMM ENG COLLEGE SCI & ENGINEEIRNG UNIV PLA
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Problems solved by technology

[0004] In wireless networks, base stations generally have strong power support, but most wireless nodes are powered by batteries. However, under current technical conditions, the energy that batteries can provide is limited and precious. Once the batteries of one or more nodes Exhaustion will lead to the failure of nodes, the decline of network performance, and even the failure of the entire network

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  • Cross-layer Routing Method Based on Energy Optimization and Network Lifetime in Cognitive Radio Cellular Networks
  • Cross-layer Routing Method Based on Energy Optimization and Network Lifetime in Cognitive Radio Cellular Networks
  • Cross-layer Routing Method Based on Energy Optimization and Network Lifetime in Cognitive Radio Cellular Networks

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Embodiment

[0062] Example: A specific embodiment of the present invention is described as follows. The system simulation adopts the discrete event simulation network system built by C language, and the parameter setting does not affect the generality. In this embodiment, 49 cognitive nodes and 1 cognitive base station are randomly distributed within the range of 400m*400m, the maximum transmission power of each node is 1w, the initial energy is 10J, the channel bandwidth W=1MHz, each The node randomly has a random number of available channels among all 10 channels, and the background noise power N 0 =9.76*10 -11 W / Hz, wireless propagation fading coefficient α=3. In the simulation, a cognitive node is randomly selected every second, and a stream with a length of 1Mbit is sent to the cognitive base station, and the communication rate requirement is 1Mbit / s. In this network scenario, we use minimum hop routing, minimum energy routing and our new routing method for routing selection. Th...

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Abstract

The invention discloses a cross-layer routing method utilized in a cognitive radio cellular network and based on energy optimization and network lifetime, and relates to the cognitive radio field in wireless communication technology. The cross-layer routing method has the advantages that new routing metrics are provided specific to characteristics that various cognitive users in the cognitive radio cellular networks have different dynamic spectrum resources and energy of wireless cognitive nodes is limited, route selection and channel assignment in the cognitive network are considered in a combined manner by the aid of a cross-layer technology, a priority algorithm for the shortest path is modified, the problem that load on individual nodes is excessively high, energy is used up in advance and the individual nodes fail are solved, death time of each node is delayed, the lifetime of the network is prolonged, large quantities of relay nodes can be selected as cognitive nodes owing to large quantities of available effective nodes, accordingly, the average energy consumption is reduced integrally, and a communication access success rate is increased.

Description

technical field [0001] The present invention relates to the field of cognitive radio in wireless communication technology, and specifically relates to a new route selection method in a cognitive radio network by combining cross-layer technology, applying an improved link state routing algorithm and a new dynamic routing metric method. Background technique [0002] At present, with the continuous improvement of the demand for wireless communication and the rapid growth of the types of wireless communication services, people's demand for wireless spectrum resources is also increasing exponentially, which makes the "spectrum scarcity" problem in wireless communication and the existing fixed spectrum allocation scheme The contradiction between inefficient distribution has become increasingly prominent. Cognitive radio technology, as an emerging technology aimed at improving spectrum utilization efficiency, can allow cognitive users or secondary users (SU) to dynamically The ac...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W40/10H04W52/02
CPCY02D30/70
Inventor 吴启晖宋绯张尧然徐煜华程云鹏郑学强
Owner COMM ENG COLLEGE SCI & ENGINEEIRNG UNIV PLA
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