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arXiv · 1309.2139

Frequency and time domain packet scheduling based on channel prediction with imperfect CQI in LTE

Yongxin Wang·Kumbesan Sandrasegaran·Xinning Zhu·Jingjing Fei·Xiaoying Kong·Cheng-Chung Lin
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Abstract

Channel-dependent scheduling of transmission of data packets in a wireless system is based on measurement and feedback of the channel quality. To alleviate the performance degradation due to simultaneous multiple imperfect channel quality information (CQI), a simple and efficient packet scheduling (PS) algorithm is developed in downlink LTE system for real time traffic. A frequency domain channel predictor based on Kalman filter is first developed to restore the true CQI from erroneous channel quality feedback. Then, a time domain grouping technique employing the joint of Proportional Fair (PF) and Modified Largest Weighted Delay First (M-LWDF) algorithms is used. It was proved this proposal achieves better performance in terms of system throughput and packet loss ratio by simulation results.

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Yongxin Wang, Kumbesan Sandrasegaran, Xinning Zhu, Jingjing Fei, Xiaoying Kong, Cheng-Chung Lin. 2013-09-09. Frequency and time domain packet scheduling based on channel prediction with imperfect CQI in LTE. https://arxiv.org/abs/1309.2139

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