Cross-Layer Design for Combining Adaptive Modulation and Coding with Hybrid ARQ to Enhance Spectral Efficiency

2006 ◽  
Author(s):  
Dalei Wu ◽  
Song Ci
Keyword(s):  
Spectral Efficiency ◽  
Adaptive Modulation ◽  
Adaptive Modulation And Coding ◽  
Cross Layer ◽  
Cross Layer Design ◽  
Hybrid Arq

scholarly journals Cross-Layer Design for Downlink Scheduling Combined with Call Admission Control in Wireless Networks

2017 ◽  
Vol 2017 ◽  
pp. 1-8
Author(s):  
Manikandan Arunachalam ◽  
Balasubadra Kandasamy
Keyword(s):  
Admission Control ◽  
Adaptive Modulation ◽  
Packet Delay ◽  
Physical Layer ◽  
Adaptive Modulation And Coding ◽  
Cross Layer ◽  
Cross Layer Design ◽  
Network Simulator ◽  
Mac Layer ◽  
Downlink Scheduling

Scheduling with admission control is proposed based on the integration of the parameters of physical layer and MAC layer called cross-layer design. To achieve the throughput, resource allocation is carried out based on the adaptive modulation and coding (AMC) in the physical layer and scheduling in MAC layer with rate adaptation. When link adaptation is applied, the total energy consumed will be reduced, which will lead to the optimization. Here the physical layer and MAC layer parameters are jointly analyzed to achieve the cross-layer integration for the proposed problem. Based on this cross-layer integration the packet delay and throughput of the multiuser system are analyzed. All the simulations were carried out in 3G simulation environment like Qualnet and Network Simulator and results were presented.

Analysis of Optimal Spectral Efficiency with Adaptive Modulation Coding and Cooperative ARQ Protocols

2013 ◽  
Vol 760-762 ◽  
pp. 344-349
Author(s):  
Xiu Li ◽  
Sheng Ye Huang ◽  
Yuan Yuan Yan ◽  
Jia Jie Liu
Keyword(s):  
Spectral Efficiency ◽  
Adaptive Modulation ◽  
Closed Form Expression ◽  
Adaptive Modulation And Coding ◽  
Destination Node ◽  
Cross Layer Design ◽  
Data Link ◽  
Low Snr ◽  
Modulation Coding ◽  
Cooperation System

In this paper aiming at maximizing the spectral efficiency, a cross-layer design which combines adaptive modulation and coding (AMC) at the physical layer and truncated automatic repeat request (ARQ) protocol at the data link layer in cooperation system is proposed. In order to analyze the system performance, we first derive a closed form expression of probability density function (PDF) of the received signal-to-noise (SNR) using maximum ratio combing (MRC) at the destination node, the theoretical results and simulation show that the new design outperforms the traditional AMC system especially at low SNR.

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