Channel Access Statistics of Parallel Multiuser Scheduling

Multiuser scheduling for cross-layer design has attracted a lot of research interest in recent years. In opportunistic multiuser diversity, the scheduler assigns the channel access to the user with the largest Signal-to Noise Ratio (SNR) among the L users awaiting transmission. This scheme maximizes the multiuser sum rate but may cause the channel access fairness problem because users with the stronger average channel strengths may monopolize the channel assignment resources. Multiuser diversity schemes which provide proportional fairness were proposed and studied which employed the normalized SNR (the SNR divided by its mean) to rank the users.