A channel allocation method based on delay minimization in eh-hcrsn

Abstract

The present invention provides a channel distribution method based on delay minimization in the EH-HCRSN (Energy Harvesting-aided node-Heterogeneous CRSN). The method comprises the steps of: in a datatransmission phase in an EH-HCRSN network, establishing a mathematical model of the EH-HCRSN network; ranking an available channel probability and time consumed by nodes, and performing grouping; distributing the grouped nodes to corresponding channels, substituting a node-channel matrix X into the established initial delay minimization mathematical model to obtain an initial time distribution matrix Tini; and finally, ranking the node distribution time on each channel to obtain an optimal time distribution matrix T* so as to obtain a corresponding channel distribution matrix X* of a node located at the nth position on a channel k and substitute the T* and the X* into a target function to solve the minimum value of the node average delay in the network. Compared to a particle swarm optimization, the algorithm can solve the problem of the channel minimum delay optimization, can ensure the good channel performance and can greatly reduce the time complexity of the algorithm.

Description

technical field [0001] The invention belongs to the problem of channel allocation in EH-HCRSN network, especially the channel allocation problem of minimum time delay in EH-HCRSN. Background technique [0002] Wireless Sensor Networks (WSNs), as a research topic with a history of more than ten years, has been exploited by many researchers in many fields such as environmental monitoring, medical care and intelligent transportation. In many applications, the data collected by the sensor is only valid for a limited time and must be communicated to the corresponding monitoring personnel before failure, which requires the data to have high real-time performance. For example, in forest fire early warning and medical monitoring services, data packets of emergencies need to be communicated to relevant personnel as soon as possible. Therefore, providing real-time services is a key technology that needs to be realized in future wireless sensor networks. But at present, most wireless...

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Problems solved by technology

In order to ensure the real-time performance of data in EH-HCRSN, this paper proposes a channel allocation algorithm based on delay minimization. This work involves the channel availability time detected in the spectrum sensing stage, the availability probability of each channel and the data Multiple parameters such as node-channel allocation in the transmission phase and the time allocation scheme of nodes on the channel are challenging

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