TY - GEN
T1 - On exploiting the on-off characteristics of human speech to conserve energy for the downlink VoIP in WiMAX systems
AU - Lin, Xiao Hui
AU - Liu, Ling
AU - Wang, Hui
AU - Kwok, Yu Kwong
PY - 2011
Y1 - 2011
N2 - Energy conservation is a critical issue in the emerging standard IEEE 802.16e/m WiMAX supporting mobility. To guarantee QoS requirements in real-time services such as VoIP, traditional energy saving strategies adopt constant listen-sleep intervals, ignoring the On-Off characteristics of human speech. However, statistically the silence period can account for nearly 60% of the whole speech in time scale. Therefore, neglecting this fact can lead to unnecessary periodical listening in the silence duration, and, in turn, can result in excessive waste of battery energy. In this paper, we adopt a hybrid energy management for the downlink simplex VoIP. We also give an evaluation model to analyze the performance of the scheme. Guided by this model, we obtain the optimal window adjustment parameters. Extensive simulation results have validated the analytical model, and indicated that, compared with the traditional scheme, the hybrid scheme can achieve as much as 90% reduction in energy dissipation during silence period, while meeting the QoS requirements satisfactorily at the same time.
AB - Energy conservation is a critical issue in the emerging standard IEEE 802.16e/m WiMAX supporting mobility. To guarantee QoS requirements in real-time services such as VoIP, traditional energy saving strategies adopt constant listen-sleep intervals, ignoring the On-Off characteristics of human speech. However, statistically the silence period can account for nearly 60% of the whole speech in time scale. Therefore, neglecting this fact can lead to unnecessary periodical listening in the silence duration, and, in turn, can result in excessive waste of battery energy. In this paper, we adopt a hybrid energy management for the downlink simplex VoIP. We also give an evaluation model to analyze the performance of the scheme. Guided by this model, we obtain the optimal window adjustment parameters. Extensive simulation results have validated the analytical model, and indicated that, compared with the traditional scheme, the hybrid scheme can achieve as much as 90% reduction in energy dissipation during silence period, while meeting the QoS requirements satisfactorily at the same time.
KW - Energy Conservation
KW - QoS
KW - Sleep Mode
KW - VoIP
KW - WiMAX
UR - https://www.scopus.com/pages/publications/80052466486
U2 - 10.1109/IWCMC.2011.5982556
DO - 10.1109/IWCMC.2011.5982556
M3 - Conference contribution
AN - SCOPUS:80052466486
SN - 9781424495399
T3 - IWCMC 2011 - 7th International Wireless Communications and Mobile Computing Conference
SP - 337
EP - 342
BT - IWCMC 2011 - 7th International Wireless Communications and Mobile Computing Conference
ER -
