Research Article
Layered Broadcast/Multicast Mechanism for Spectral-Efficient 4G Wireless networks
@INPROCEEDINGS{10.1109/ChinaCom.2011.6158192, author={Jingqing Mei and Hong Ji and Yi Li}, title={Layered Broadcast/Multicast Mechanism for Spectral-Efficient 4G Wireless networks}, proceedings={6th International ICST Conference on Communications and Networking in China}, publisher={IEEE}, proceedings_a={CHINACOM}, year={2012}, month={3}, keywords={spectral efficient layered broadcast/multicast 4g wireless network}, doi={10.1109/ChinaCom.2011.6158192} }- Jingqing Mei
Hong Ji
Yi Li
Year: 2012
Layered Broadcast/Multicast Mechanism for Spectral-Efficient 4G Wireless networks
CHINACOM
IEEE
DOI: 10.1109/ChinaCom.2011.6158192
Abstract
By adopting hierarchical modulation, layered broadcast/multicast mechanism is a promising method to achieve spectral efficient transmission for users with diverse fading channels in 4G wireless networks, however, there is a great challenge to determine the optimal modulation parameters in applications due to the varying wireless environment and the technique characteristics. In this work, a Spectral-efficient Layered Broadcast/Multicast (SLBM) mechanism for 4G Wireless networks is proposed to solve this problem in a Rayleigh fading channel. With consideration of both the efficiency and reliability, a spectral efficiency evaluation function is formulated, and to facilitate the decision process of optimal modulation parameters, a modulation solution set for SLBM with multiple layers is defined. Based on the modulation solution set, a layered modulation solution selection algorithm is illustrated to determine the optimal modulation parameters effectively. Numeric analysis is conducted to demonstrate the proposed mechanism with comparison to conventional scheme, and the results demonstrate that LBMS mechanism could yield higher energy efficiency under different bit error rate (BER) targets, while the impact of number of layers is discussed.