TY - GEN
T1 - An opportunistic multi rate MAC for reliable H.264/AVC video streaming over wireless mesh networks
AU - Byung, Joon Oh
AU - Chang, Wen Chen
PY - 2009
Y1 - 2009
N2 - We present in this paper a scheme of reliable transmission of H.264/AVC video over Wireless Mesh Networks (WMNs) based on an Opportunistic Multi Rate (OMR) IEEE 802.11 MAC Strategy. This OMR strategy employs the channel reservation control packets at the MAC layer to exchange timely Channel Quality Estimation (CQE) information for an adaptive adjustment of spectrally efficient transmission rate at the physical layer. Such rate adaptation scheme offers an optimized transmission to guarantee the minimum packets delay and drop rate needed for time bound applications, such as video. Since IEEE 802.11 standard does not adopt a multi-rate MAC to support time critical applications, we need to resolve the problem associated with IEEE 802.11 standard by designing a novel adaptive rate architecture with minor modification on IEEE 802.11 MAC protocol based on CQE. This integrated scheme allows the physical layer to achieve the optimal transmission via smart FEC scheme implemented in the application layer. We evaluate the proposed scheme based on network-level metrics, including bit rate, packets delay and drop rate, in comparison with the state-of-the-art Opportunistic Auto-Rate (OAR) MAC scheme based on IEEE 802.11 WMNs. Extensive simulation results based on H.264/AVC video transmission for both proposed OMR scheme and OAR MAC have confirmed that the proposed OMR strategy outperforms the OAR MAC by a significant margin as CQE and smart FEC is able to adapt to the dynamic network conditions of IEEE 802.11 WMNs in a timely fashion.
AB - We present in this paper a scheme of reliable transmission of H.264/AVC video over Wireless Mesh Networks (WMNs) based on an Opportunistic Multi Rate (OMR) IEEE 802.11 MAC Strategy. This OMR strategy employs the channel reservation control packets at the MAC layer to exchange timely Channel Quality Estimation (CQE) information for an adaptive adjustment of spectrally efficient transmission rate at the physical layer. Such rate adaptation scheme offers an optimized transmission to guarantee the minimum packets delay and drop rate needed for time bound applications, such as video. Since IEEE 802.11 standard does not adopt a multi-rate MAC to support time critical applications, we need to resolve the problem associated with IEEE 802.11 standard by designing a novel adaptive rate architecture with minor modification on IEEE 802.11 MAC protocol based on CQE. This integrated scheme allows the physical layer to achieve the optimal transmission via smart FEC scheme implemented in the application layer. We evaluate the proposed scheme based on network-level metrics, including bit rate, packets delay and drop rate, in comparison with the state-of-the-art Opportunistic Auto-Rate (OAR) MAC scheme based on IEEE 802.11 WMNs. Extensive simulation results based on H.264/AVC video transmission for both proposed OMR scheme and OAR MAC have confirmed that the proposed OMR strategy outperforms the OAR MAC by a significant margin as CQE and smart FEC is able to adapt to the dynamic network conditions of IEEE 802.11 WMNs in a timely fashion.
UR - https://www.scopus.com/pages/publications/70350168307
U2 - 10.1109/ISCAS.2009.5117987
DO - 10.1109/ISCAS.2009.5117987
M3 - Conference contribution
AN - SCOPUS:70350168307
SN - 9781424438280
T3 - Proceedings - IEEE International Symposium on Circuits and Systems
SP - 1241
EP - 1244
BT - 2009 IEEE International Symposium on Circuits and Systems, ISCAS 2009
T2 - 2009 IEEE International Symposium on Circuits and Systems, ISCAS 2009
Y2 - 24 May 2009 through 27 May 2009
ER -