Research Article

Combined Sector and Channel Hopping Schemes for Efficient Rendezvous in Directional Antenna Cognitive Radio Networks

Figure 8

An example of AGQ-CH sequences constructions and rendezvous for a pair of communicating SUs.
(a) GCQs for mapping
(b) GRQs for mapping
(c) Channel rendezvous between SUs on the common channel when start its CH with 0, 1, and 5 slots later than