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Deploying roadside access points (APs) or an infrastructure can improve data delivery. Our empirical results from real trace driven simulations show that deploying APs produces up to 5× performance gain in delivery ratio and reduces delivery delay by as much as 35% with simple routing. However, we also find that buffer resources at the APs become a critical factor and poor buffer allocation leads...
In this paper, we study the pilot power allocation in the amplify-and-forward (AF) relay system based on orthogonal frequency division multiplexing (OFDM) modulation. By giving the closed-form expression of the outage probability, we theoretically derive the optimized pilot power allocation. Then we verify our results through simulation. At last, the numerical results match the analytical results...
In this paper, we propose a cooperative load balancing scheme focusing on improving effective resource utilization and mitigate the co-channel interference across domains through fair resource allocation in heterogeneous network (Het-Net). We models the load balancing issue as an optimization problem for minimizing the effective resource utilization. Simulation results have demonstrated that the system...
In this paper, we consider a three node relay channel with amplify-and-forward (AF) transmission mode. Instead of analyzing the cascaded source-relay-destination channel directly at the destination, we estimate the source-relay channel based on the received pilot signals and the pre-estimated channel of relay-destination link by inserted training at the relay. Given that the outage probability has...
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