Queueing Analysis for Cross-Layer Optimization in Wireless Communications

• Main Authors: Cheng-Yu Shih, 施承佑
• Other Authors: Ping-Cheng Yeh
• Format: Others
• Language: en_US
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/22478559545622210511

碩士 === 臺灣大學 === 電信工程學研究所 === 98 === In recent years, adaptive modulation and coding (AMC) schemes are widely implemented in wireless communication system. Assuming the system always has sufficient buffer size and the time-out constraint are not taken into account, AMC can be employed to achieve the maximal throughput at physical layer. However, this assumption is invalid in practice. The queue effect at higher layer may be influential in throughput when the buffer size is limited or considering the time-out constraint. In this thesis, we analyze the cross-layer AMC scheme by modeling the wireless communication system as a Markovmodulated Poisson process (MMPP)/D/1/Markov-modulated service speed (MMSS) queue. We redefine the throughput with considering the blocking and time-out issues, and obtain the optimal setting to achieve the maximal throughput. Numerical results illustrate the dependence of system performance on different system parameter settings.