DocumentCode :
2884613
Title :
Bidirectional Packet Aggregation and Coding for VoIP Transmission in Wireless Multi-Hop Networks
Author :
Hasegawa, Jun ; Yomo, Hiroyuki ; Kondo, Yoshihisa ; Davis, Peter ; Suzuki, Ryutaro ; Obana, Sadao ; Sakakibara, Katsumi
Author_Institution :
ATR Adaptive Commun. Res. Labs., Kyoto, Japan
fYear :
2009
fDate :
14-18 June 2009
Firstpage :
1
Lastpage :
6
Abstract :
This paper proposes bidirectional packet aggregation and coding (BiPAC), a packet mixing technique which jointly applies packet aggregation and network coding in order to increase the number of supportable VoIP sessions in wireless multi-hop networks. BiPAC applies network coding for aggregated VoIP packets by exploiting bidirectional nature of VoIP sessions, and largely reduces the required protocol overhead for transmitting short VoIP packets. We design BiPAC and related protocols so that the operations of aggregation and coding are well-integrated while satisfying the required quality of service by VoIP transmission, such as delay and packet loss rate. Our computer simulation results show that BiPAC can increase the number of supportable VoIP sessions maximum by around 70% as compared with the case when the packet aggregation alone is used, and 450% in comparison to the transmission without aggregation/coding. We also implement BiPAC in a wireless testbed, and run experiments in an actual indoor environment. Our experimental results show that BiPAC is a practical and efficient forwarding method, which can be implemented into the current mesh hardware and network stack.
Keywords :
Internet telephony; aggregation; encoding; protocols; wireless channels; VoIP transmission; actual indoor environment; bidirectional packet aggregation; computer simulation; mesh hardware; network coding; network stack; packet mixing; protocol overhead; wireless multihop networks; wireless testbed; Computer simulation; Delay; Hardware; Indoor environments; Network coding; Propagation losses; Protocols; Quality of service; Spread spectrum communication; Testing;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Communications, 2009. ICC '09. IEEE International Conference on
Conference_Location :
Dresden
ISSN :
1938-1883
Print_ISBN :
978-1-4244-3435-0
Electronic_ISBN :
1938-1883
Type :
conf
DOI :
10.1109/ICC.2009.5198784
Filename :
5198784
Link To Document :
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