Patent Document ID: 20170331513
Application ID: 15527955
Patent Flag: 0

Claim One:
1. A permutation group-based channel rendezvous method for a multi-antenna cognitive radio network, wherein different users which need rendezvous in the network at least have one common available channel, and the rendezvous process comprises: Channel numbers are mapped as elements in permutation groups, and channel hopping sequences of different antennas within one period are mapped as sequences of different elements in finite groups; under the condition that the number of channels in the cognitive radio network is even, the elements in the permutation groups are vertexes of a regular polyhedron and the channel hopping sequences of different antennas are constructed through permutation groups obtained by rotating the regular polyhedron by different angles according to different types and different directions of axes of symmetry; under the condition that the number of the channels in the cognitive radio network is odd, the elements in the permutation groups are vertexes of a regular polygon and the channel hopping sequences of different antennas are constructed through permutation groups obtained by rotating the regular polygon by different angles according to different types of axes of symmetry and successively sustained left/right cyclical rotation; through limited time slots, the common available channel appears in the same time slot of the different users to achieve channel rendezvous.