Abstract
In 4G, LTE-Advanced specifies the key objective that the gigabit data rate for real-time video streaming can be transmitted under a high mobility scenario; thus, packet scheduling and radio resource management become the critical techniques that should be addressed effectively. Additionally, the mechanisms of relaying and the OFDMA coding have been certainly adopted in LTE-Advanced and IEEE 802.16 j/m for the purposes of increasing the wireless service coverage and improving signal quality of UEs nearing the cell boundaries. Several studies propose some improvements for the relaying-based packet scheduling, but suffer from long packet delay, high packet dropping probability moderate system capacity, and degrading QoS of real-time packet transmissions. This paper thus proposes an Adaptive LTE-Advanced cross-layer packet Scheduling (ALS) to guarantee real-time high-speed packet service for LTE-Advanced. ALS consists of two mechanisms: (1) Adaptive Reward Priority Scheduling: the cross layer-based adaptive packet scheduling at the MAC layer and (2) Dynamic Resource Allocation algorithm: the efficient radio resource allocation at the PHY layer. Numerical results demonstrate ALS outperforms the compared approaches in system capacity, packet dropping probability, average packet delay, etc.
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Acknowledgements
This research was supported in part by the National Science Council of Taiwan, ROC, under contracts of MOST-105-2221-E-224-031-MY2, NSC-101-2221-E-224-022-MY3 and NSC-102-2221-E-252-005.
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Chang, BJ., Liang, YH. & Chang, PY. Adaptive Cross-Layer-Based Packet Scheduling and Dynamic Resource Allocation for LTE-Advanced Relaying Cellular Communications. Wireless Pers Commun 96, 939–960 (2017). https://doi.org/10.1007/s11277-017-4212-5
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DOI: https://doi.org/10.1007/s11277-017-4212-5