Positional Analysis of Spectrum Sharing Between IEEE 80.16 and TV Band

Cognitive radio techniques CR are being employed across various communication systems, showing potential in enhancing the utilization of currently underused radio frequencies. This advancement holds promise for improving commercial data services and facilitating the establishment of new emergency and military communication services. An illustration of this is the exploration of coexistence between licensed TV bands (primary user) and unlicensed WiMax IEEE 802.16 bands (secondary user). Despite the allocation of a significant portion of the radio frequency spectrum to TV bands, much of it remains unused. This underutilization makes TV spectrum an attractive candidate for dynamic spectrum access (DSA). However, further investigation is necessary to ascertain the suitability of this spectrum for supporting secondary transmissions. Dynamic Frequency Selection (DFS) empowers radios to select bands by minimal interference, while Power Control (PC) facilitates communication at the lowest feasible power transmit. Time Agility (TA) allows radios to adjust according to the traffic patterns of one another, This helps reduce disruption in challenging channel situations. These techniques were evaluated through simulations conducted using the network simulator NS2. The simulation outcomes are presented for scenarios involving communication between two nodes within WiMax operating within TV bands.