Patent ID: 7869400

Claim:
A spectrum sharing method performed by a DYSPAN system comprising: performing channel evaluations and channel selections to detect and select spectrum holes; verifying if non-exclusive sharing of selected channels is feasible; if non-exclusive sharing of the selected channels is feasible, making a DFS decision and scheduling data transmissions on the selected channels with appropriate TPC settings; if non-exclusive sharing is unfeasible, performing exclusive sharing of the selected channels; if the selected spectrum hole is not occupied by a specific type of DYSPAN system, then performing data transmissions without using the selected channels if possible; and if the selected spectrum hole is occupied by a specific type of DYSPAN system, initiating a spectrum contention process for ownership of the selected channels, wherein a non-exclusive spectrum sharing method is feasible as long as a maximum achievable signal-to-interference-ratio (SIR) on the selected channel is higher than a required SIR of the DYSPAN system.