Abstract
Opportunistic scheduling schemes maximizes the aggregate capacity by using multiuser diversity. Users are chosen to serve according to their signal-to-noise ratios (SNR) for a particular time slot and the user with the highest SNR is selected. Typically, a homogeneous system, in which every user has the same mean SNR, allocates time slots to all users with equal channel utilization. On the other hand, a heterogeneous system, in which every user can have different mean SNRs, frequently chooses users with the highest mean SNR to maximize the aggregate capacity. In this paper, we present a user scheduling method on the broadcast channels for heterogeneous systems exploiting multiuser diversity according to predefined user channel access probabilities. This work is the improved version given in “A Feedback Quantization Scheme Leveraging Fairness and Throughput for Heterogeneous Multi-User Diversity Systems,” IEEE Trans. Vehicular Technology, Volume 59, Issue 5, p. 2610–2614, 2010. Thus, the users access to the channel according to the predefined quality of service while the aggregate capacity is maximized.
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