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

Figure 2

Successful synchronous and asynchronous sector rendezvous for the two pairs of communicating SUs in Figure 1.

(a) Sector rendezvous between the sender and the receiver on the rendezvous sector pair for the cases when starts its SH with slots later than , where

(b) Sector rendezvous between the sender and the receiver on the rendezvous sector pair for the cases when starts SH with slots earlier, where