Joint On-Demand Routing and Spectrum Assignment in Cognitive Radio Networks

— In Cognitive Radio Networks, nodes can work on different frequency bands. Existing routing proposals help nodes select frequency bands without considering the effect of band switching and intra-band backoff. In this paper, We propose a joint interaction between on-demand routing and spectrum scheduling. A node analytical model is proposed to describe the scheduling-based channel assignment progress, which relief the inter-flow interference and frequent switching delay. We also use an on-demand interaction to derive a cumulative delay based routing protocol. Simulation results show that, comparing to other approaches, our protocol provides better adaptability to the multiflow environment and derives paths with much lower cumulative delay.

• Type: Conference
• Year: 2007
• Where: ICC
• Authors: Geng Cheng, Wei Liu, Yunzhao Li, Wenqing Cheng
• Keywords: Communications, Cumulative Delay, Frequency Bands, ICC 2007, Nodes Select Frequency