Cross-Layer Design for LTE System with Jointly AMC and ARQ on Fading Channel

被引：0

作者：

Wang, Desheng ^{[1
]}

Lu, Li ^{[1
]}

Fang, Yingyong ^{[2
]}

Wu, Jianxue ^{[2
]}

机构：

[1] Huazhong Univ Sci & Technol, Dept Smart Network, WNLO, Wuhan, Peoples R China

[2] Res Inst Posts & Telecommun, Dept Opt Fiber Commun, Wuhan, Peoples R China

来源：

2013 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE (WCNC) | 2013年

基金：

中国国家自然科学基金;

关键词：

cross-layer design; automatic repeat request (ARQ); adaptive modulation and coding (AMC); quality of Service (QoS); LTE system; ADAPTIVE MODULATION;

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A cross-layer design is developed for error-sensitive and latency-tolerated traffic over LTE system. Two adaptive techniques, automatic repeat request (ARQ) protocol at radio link control (RLC) sublayer and medium access control (MAC) sub layer and adaptive modulation and coding (AMC) scheme at physical (PHY) layer are combined to improve the average spectral efficiency of the system. The segmentation mechanism and the in-sequence delivery procedure are both considered. Closed-form expressions for performance metrics such as average service data unit (SDU) error rate and average in-sequence delivery SDU delay at RLC sub layer are derived. Using these expressions, an optimization problem is formulated to maximize the average spectral efficiency when the quality of service (QoS) achieves certain requirement. Simulation results reveal that we can further improve the average spectral efficiency by dynamically adjusting the adaptive parameters of the ARQ and AMC module, compared to the previous LTE system.

引用

页码：356 / 361

页数：6

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