Joint Delay and Maintenance Optimization for Spectrum Handoff in Cognitive Radio Networks Using Binary Shuffled Frog Leaping Algorithm
Jianjun Jiang, Shilian Zheng · 2019
In cognitive radio networks, when a primary user reoccupies the channel, cognitive radios (CRs) need to vacate the channel and reestablish a link on some other channel to avoid interference to primary users, resulting in spectrum handoff. A joint spectrum handoff delay and link maintenance optimization problem for spectrum handoff is formulated in this paper. A binary shuffled frog leaping algorithm (SFLA) based algorithm is proposed to solve this problem. Simulations show that the proposed algorithm performs far better than random target channel visiting scheme. It can obtain solutions with low handoff delay and low probability of handoff failure which are very close to the optimal solutions.