Opportunistic Scheduling Algorithm for Throughput Maximization in Cooperative Communication
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Recently, a novel technology called cooperative communication has attracted great attention due to its benefits of achieving multiple antenna gain with multiple single antenna devices. In this paper, we propose a cooperation technique based on the hybrid automatic repeat request (HARQ), which adapts its transmission mode opportunistically according to channel qualities in order to maximize the capacity. We first present a basic HARQ-based architecture for opportunistic cooperation. This architecture enables the system to select which channel to use among the source-destination, relay-destination, and source-relay channels on the basis of the qualities of these channels. The cooperative scheduler takes charge of deciding the channel to use. To design the cooperative scheduler, we formulate the optimization problem of which the target is to maximize the throughput, and solve it by using the dual optimization technique. We present the simulation results showing that the proposed scheme outperforms the non-cooperative scheme.
Abstract
Recently, a novel technology called cooperative communication has attracted great attention due to its benefits of achieving multiple antenna gain with multiple single antenna devices. In this paper, we propose a cooperation technique based on the hybrid automatic repeat request (HARQ), which adapts its transmission mode opportunistically according to channel qualities in order to maximize the capacity. We first present a basic HARQ-based architecture for opportunistic cooperation. This architecture enables the system to select which channel to use among the source-destination, relay-destination, and source-relay channels on the basis of the qualities of these channels. The cooperative scheduler takes charge of deciding the channel to use. To design the cooperative scheduler, we formulate the optimization problem of which the target is to maximize the throughput, and solve it by using the dual optimization technique. We present the simulation results showing that the proposed scheme outperforms the non-cooperative scheme.
참고문헌 (18)
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