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This paper considers multiaccess control for the uplink in orthogonal-frequency-division-multiple-access (OFDMA) wireless networks. To avoid extensive information exchange with the access point in centralized approaches, we propose a distributed threshold-based scheme, where each user accesses multiple channels simultaneously based on a comparison between measured channel gains and a channel gain...
With the convergence of multimedia applications and wireless communications, there is an urgent need for developing new scheduling algorithms to support real-time traffic with stringent delay requirements. However, distributed scheduling under delay constraints is not well understood and remains an under-explored area. A main goal of this study is to take some steps in this direction and explore the...
Cooperative spectrum sensing has greatly improved the performance of the cognitive radio. If the cognitive users belong to different groups, they seem to be less insensitive to achieve a higher throughput. In this paper , an evolutionary game framework is proposed to study the interactions between selfish users in the cooperative sensing .We compare the dynamics and the stationary strategy of the...
We characterize the Nash equilibrium point of the request probability in a network using the Request-to-send / Clear-to-send (RTS/CTS) handshake mechanism for channel reservation, where each node tries to minimize its average power investment selfishly while meeting its average throughput demand over the shared wireless channel to a common base station. The feasible region of throughput demands is...
In this paper, we study distributed opportunistic scheduling (DOS) in an ad hoc network, where many links contend for the same channel using random access. In such a network, DOS involves a process of joint channel probing and distributed scheduling. Due to channel fading, the link condition corresponding to a successful channel probing could be either good or poor. In the latter case, further channel...
Cooperative spectrum sensing has been shown to greatly improve the sensing performance in cognitive radio networks. However, if the cognitive users belong to different service providers, they tend to contribute less in sensing in order to achieve a higher throughput. In this paper, we propose an evolutionary game framework to study the interactions between selfish users in cooperative sensing. We...
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