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In order to curtail unnecessary energy consumption and improve energy efficiency, the cell on/off technique arises, especially in dense small cell deployments. However, the Transition Time between ON and OFF state deteriorates the energy efficiency. In this paper, we mainly discuss the optimization for energy efficiency considering the impact of Transition Time. We discover the on/off gain window,...
In order to curtail unnecessary energy consumption and improve energy efficiency, the cell on/off technique arises, especially in dense small cell deployments. However, the Transition Time between ON and OFF state deteriorates the energy efficiency. In this paper, we mainly discuss the optimization for energy efficiency considering the impact of Transition Time. We discover the on/off gain window,...
Multi-user Multiple Input Multiple Output (MU-MIMO) system is known to enhance the system capacity with low network delay. One of the biggest challenges with MU-MIMO is on the scheduling scheme which simultaneously selects multiple users to maximize the sum rate. Genetic Algorithm (GA) works perfectly as an optimal or suboptimal solution with quite low complexity to handle such problems. In this paper,...
This paper considers the scheduling and resource allocation with adaptive modulation in downlink coordinated multi-point transmission (CoMP) systems, where multiple users are served via zero-forcing precoding simultaneously by several cooperative base stations (BSs). The joint scheduling and resource allocation to maximize the sum rate is formulated as a combinational optimization problem under constraints...
In this paper, we address the problem of designing a joint scheduling and power control algorithm in a downlink coordinated multi-point (CoMP) cluster supporting CoMP joint transmission. The objective is to maximize the cell-edge throughput under per-point power constraints. By an analytical derivation, binary power control is proved to be the optimal solution for any given selected user group. Utilizing...
The inter-cell interference of orthogonal frequency division multiple access (OFDMA) based multi-cell distributed network architecture is analyzed. Based on generalized distributed cellular architecture-group cell, the interference condition without power control and with power control is analyzed respectively, and the system outage probability compared to traditional cellular structure is evaluated...
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