TY - GEN
T1 - Evaluation of cross layer QoS aproachs for improving voice quality over multi-rate WLANs
AU - Tüysüz, Mehmet Fatih
AU - Mantar, Haci Ali
PY - 2010
Y1 - 2010
N2 - Voice over IP (VoIP) applications over wireless local area networks (WLANs) has become increasingly popular in recent years. However, due to some performance related topics like existence of multi-rate transmission or channel conditions, it has to be placed under control continuously to prevent possible performance losses. In case of any deterioration on the wireless link conditions, IEEE 802.11 PHY/MAC specifications allow mobile nodes to select a proper transmission rate to optimize bit transmission. However, if a node selects lower transmission rate, packet losses and delays increase due to multi-rate effect. Therefore, all active calls have a general degradation. Besides, Jitter buffering is also one of the most important performance metrics of VoIP over WLANs and has to be taken into account to maximize the perceived voice quality. In this paper, we propose and evaluate our cross layer based Adaptive Codec and Frame size Modification algorithm (ACFM) with related algorithms for the optimization of maximum throughput and voice quality on multi-rate WLANs.
AB - Voice over IP (VoIP) applications over wireless local area networks (WLANs) has become increasingly popular in recent years. However, due to some performance related topics like existence of multi-rate transmission or channel conditions, it has to be placed under control continuously to prevent possible performance losses. In case of any deterioration on the wireless link conditions, IEEE 802.11 PHY/MAC specifications allow mobile nodes to select a proper transmission rate to optimize bit transmission. However, if a node selects lower transmission rate, packet losses and delays increase due to multi-rate effect. Therefore, all active calls have a general degradation. Besides, Jitter buffering is also one of the most important performance metrics of VoIP over WLANs and has to be taken into account to maximize the perceived voice quality. In this paper, we propose and evaluate our cross layer based Adaptive Codec and Frame size Modification algorithm (ACFM) with related algorithms for the optimization of maximum throughput and voice quality on multi-rate WLANs.
KW - Adaptive jitter buffer
KW - Component
KW - Cross layer
KW - Link adaptation
KW - QoS
KW - Voice over ip (VoIP)
UR - https://www.scopus.com/pages/publications/78751608150
U2 - 10.1109/ICCES.2010.5674893
DO - 10.1109/ICCES.2010.5674893
M3 - Conference contribution
AN - SCOPUS:78751608150
SN - 9781424470426
T3 - Proceedings, ICCES'2010 - 2010 International Conference on Computer Engineering and Systems
SP - 73
EP - 78
BT - Proceedings, ICCES'2010 - 2010 International Conference on Computer Engineering and Systems
T2 - 2010 6th International Conference on Computer Engineering and Systems, ICCES'2010
Y2 - 30 November 2010 through 1 December 2010
ER -