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In this work we study the problem of channel state feedback and user scheduling in a single cell downlink wireless network employing multiple orthogonal parallel channels. The aspect of the system we are focusing on is stability. For user scheduling for stability as a performance measure, both the queue and channel states need to be known by the base station. However channel states can be known only...
This paper considers the problem of energy-efficient communication in the downlink of a cellular OFDMA network. User scheduling and power allocation are jointly optimized across a cluster of coordinated base stations so as to maximize the weighted sum of the energy efficiencies on the available resource slots under a per-subcarrier power constraint. The asymptotic noise-limited regime is also discussed...
As conventional single-layered network cannot satisfy the increasing demand in high-speed indoor data service, femtocell has been introduced to provide higher network capacity and better user experience. However, the downlink transmit signal from femtocell base station (FBS) may result in severe cross-tier interference to macrocell users (MUE). To address this problem, we propose a dynamic femtocell...
The energy efficiency (EE) optimization in downlink carrier aggregated networks is addressed in this paper. To maximize EE by joint component carrier (CC) configuration and power control, we first model the problem as a mixed integer non-linear programming problem, which is NP-hard. Then the existence of optimal solution is proved. Based on the properties of optimal solution obtained by analysis,...
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