A Mobility-Aware and Quality-Driven Retransmission Limit Adaptation Scheme for Video Streaming over VANETs

• Published in: IEEE transactions on wireless communications Vol. 11; no. 5; pp. 1817 - 1827
• Main Authors: Asefi, M., Mark, J. W., Xuemin Shen
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.05.2012; Institute of Electrical and Electronics Engineers
• Subjects: Access methods and protocols, osi model; Applied sciences; Business and industry local networks; Channel estimation; Delay; Exact sciences and technology; MAC retransmission limit adaptation; Media Access Protocol; multi-objective optimization; Networks and services in france and abroad; Optimization; Streaming media; Switching and signalling; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Teleprocessing networks. Isdn; Transmission and modulation (techniques and equipments); VANETs; Vehicles; video streaming; Wireless communication; Access control; Performance evaluation; Wireless LAN; Parameter estimation; Wireless telecommunication; Multiobjective programming; Video signal; Doppler effect; VNETs; Adaptive control; Image sequence; Channel estimation; Selection criterion; Delay time; video streaming; IEEE standards; Ad hoc network; State estimation; Periodic system; Streaming; Packet switching; MAC retransmission limit adaptation; Information transmission; Vehicular communication; Transmission rate; Access protocol; multi-objective optimization; Personal communication networks
• ISSN: 1536-1276; 1558-2248
• DOI: 10.1109/TWC.2012.030812.111064

An adaptive medium access control (MAC) retransmission limit selection scheme is proposed to improve the performance of IEEE 802.11p standard MAC protocol for video streaming applications over vehicular ad-hoc networks (VANETs). A multi-objective optimization framework, which jointly minimizes the probability of playback freezes and start-up delay of the streamed video at the destination vehicle by tuning the MAC retransmission limit with respect to channel statistics as well as packet transmission rate, is applied at road side unit (RSU). Periodic channel state estimation is performed at the RSU using the information derived from the received signal strength (RSS) and Doppler shift effect. Estimates of access probability between the RSU and the destination vehicle is incorporated in the design of the adaptive MAC scheme. The adaptation parameters are embedded in the user datagram protocol (UDP) packet header. Two-hop transmission is applied in zones in which the destination vehicle is not within the transmission range of any RSU. For multi-hop scenario, we discuss two-hop joint MAC retransmission adaptation and path selection. Compared with the non-adaptive IEEE 802.11p standard MAC, numerical results show that the proposed adaptive MAC protocol exhibits significantly fewer playback freezes while introduces only a slight increase in start-up delay.