Heterogeneous Dynamic Priority Scheduling in time critical applications: Mobile Wireless Sensor Networks

TL;DR

This paper proposes a dynamic priority scheduling method for mobile wireless sensor networks in unlicensed bands, addressing mobility, energy, and data importance to improve time-critical data transmission.

Contribution

It introduces a novel priority assignment scheme considering mobility, energy, and data importance, validated through NS-2 simulations for unlicensed band cognitive radio networks.

Findings

Effective priority allocation in mobile WSNs under multiple constraints

Improved data transmission timeliness in simulations

Demonstrated feasibility of dynamic priority scheduling

Abstract

In the unlicensed band, the notion of primary user and secondary user (To implement cognitive radio) is not explicit. By dynamic priority assignment we propose to implement cognitive radio in the unlicensed band. In time critical events, the data which is most important, has to be given the time slots. Wireless Sensor nodes in our case are considered to be mobile, and hence make it difficult to prioritize one over another. A node may be out of the reach of the cluster head or base station by the time it is allotted a time slot and hence mobility is a constraint. With the data changing dynamically and factors such as energy and mobility, which are major constraints, assigning priority to the nodes becomes difficult. In this paper, we have discussed about how Wireless Sensor Networks are able to allocate priorities to nodes in the unlicensed band with multiple parameters being posed. We have done simulations on NS-2 and have shown the implementation results.