Frequency and Time Domain Packet Scheduling Based on Channel Prediction With Imperfect CQI in LTE

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Provided by: Academy & Industry Research Collaboration Center
Topic: Mobility
Format: PDF
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.
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