Cooperative Diversity Terminal Pair Selection via Cognitive Radio Sensing

The patent applies universality by enabling existing subchannels to serve dual purposes: both for traditional base station-terminal data transmission and for terminal-to-terminal data exchange in cooperative diversity mode. This eliminates the need for dedicated separate channels, thereby maintaining resource efficiency while ensuring reliable data exchange between cooperative terminals through the same shared subchannels.

The patent implements feedback mechanisms where terminals report channel state information and cooperation status to the base station. The base station uses this feedback to identify suitable terminal pairs for cooperative diversity operation, selecting pairs that can achieve maximum diversity gain while managing system complexity through automated decision-making based on real-time channel conditions.

The patent merges the data exchange function into existing subchannels that are already allocated for base station-terminal communication. By combining multiple functions (base station communication and terminal cooperation) into shared subchannels, the system avoids allocating additional separate channels, thus maintaining high resource utilization while ensuring reliable data exchange through the integrated subchannel infrastructure.