Cross-Layer Throughput Optimization in Cognitive Radio Networks with SINR Constraints

Table 2

Set of available channels at each node (i.e., 𝐶_𝑖) for regular topology.

Node index	Location	Available channels
1	(20, 20)	2, 3, 4
2	(20, 40)	1, 2, 4, 6
3	(20, 60)	1, 2, 5,
4	(40, 20)	3, 4, 5, 6
5	(40, 40)	1, 3, 4, 6
6	(40, 60)	1, 3, 5
7	(60, 20)	1, 2, 5, 6
8	(60, 40)	2, 4, 5
9	(60, 60)	1, 2, 3, 6