Abstract
The growing demands of high-speed and stable next generation 5G cellular networks become the main stream in these years. In order to overcome a bottleneck of high-speed communication which is caused by limited spectrum resources, cognitive radio (CR) network has been proposed as a promising technology in 5G networks. However, in CR networks, primary user (PU) networks lead another novel NP-Hard routing problem on continuous data transmission, especially for some low-latency scenario. To settle this problem, a new mirror-image-based disjoint multi-path routing algorithm (MIDMRA) is presented in this paper. A mirror image algorithm is employed in MIDMRA to simplify the routing challenge of CR network’s multi-channel environment, and an Optimal Path Selection mechanism is equipped to evaluate relationship between CR nodes and PUs when paths are being selected. Through theoretical and simulation analyses, MIDMRA has better performances on continuous communication under PU interferences than other multi-path routing algorithms.
Highlights
By 2020, mobile wireless networks would cover around 90% of the world, and much more mobile data traffic may be consumed on video-based content transmission [1]
4.1 Simulation setup We generate a 70 to 70 m square space, and all cognitive radio (CR) nodes and primary user (PU) could only move in this plane space
Because the closeness mechanism needs priori routing information, an all-path routing algorithm is added before comparison, which costs a lot of time and lengthens simulation period enormously
Summary
By 2020, mobile wireless networks would cover around 90% of the world, and much more mobile data traffic may be consumed on video-based content transmission [1]. By dividing long-term priori channel sensing information into n time slots, a greedy algorithm is utilized to choose paths which have least occupied time slots, jammers’ interference could be decreased to the bottom This type solutions could not be shared in CR network environments since differences exist between jammer and PU (e.g., jammer is always chasing users’ wireless single for attacking, which increases predictability of jammer’s movements). Selected multiple paths are the disjoint paths which could transmit data with maximum communication efficiency under PUs’ interferences This multi-path routing method is only suitable in multiple interface environment since reselected CR nodes may exist in chosen paths. A novel solution on single interface CR nodes is needed
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