다중 셀 상향링크 네트워크에서 신호와 간섭을 동시에 고려하는 전력 제어 및 사용자 스케쥴링

Abstract

In this paper, we propose a distributed user scheduling with interference-aware power control (IAPC) to maximize signal to generating interference plus noise ratio (SGINR) in uplink multi-cell networks. Assuming that the channel reciprocity time-division duplexing (TDD) system is used, the channel state information (CSI) can be obtained at each user from pilot signals from other BSs. In the proposed scheduling, to be specific, each user reduces the transmit power if its generating interference to other BSs is larger than a predetermined threshold. Each BS selects the user with the largest SGINR among users. Simulation results show that the proposed technique significantly outperforms the existing user scheduling algorithms. It is worth noting that the proposed technique operates with distributed manner without information exchange among cells. Hence, it can be easily applied to the practical wireless systems like 3GPP LTE without significant modifications of the specification. 키워드 : 셀롤라 네트워크, 셀 간 간섭, 신호 대 발생 간섭 및 잡음비 (SGINR), 사용자 스케쥴링, 전력제어