摘要
Vehicle to Infrastructure (V2I) communications aim to provide mobile users on the road low-cost Internet and driver safety services. However, to meet Quality of Service (QoS) requirements of various applications and officiently utilize limited wireless channel resourc- es, the transport layer protocol has to perform effective rate control in low channel quality and frequent changing topology communica- tion environment. In this paper, we propose a novel rate-control scheme in infrastructure based vehicular networks that avoids conges- tion and starvation and promotes fairness in end-to-end V2I communications. In vehicular networks, a bottleneck roadside unit (RSU) keeps track of its buffer size, aggregate incoming rate, and link throughput, and appropriately allocates bandwidth to traversing flows. With feedback information from the RSU, source nodes dynamically adjust their sending rates to avoid buffer overflow or starvation at the bottleneck RSU. Simulation results show that the proposed scheme can reduce not only packet losses owing to buffer overflow but also buffer starvation time, which improves the utilization efficiency of wireless channel resource.
Vehicle to Infrastructure (V2I) communications aim to provide mobile users on the road low-cost Internet and driver safety services. However, to meet Quality of Service (QoS) requirements of various applications and officiently utilize limited wireless channel resourc- es, the transport layer protocol has to perform effective rate control in low channel quality and frequent changing topology communica- tion environment. In this paper, we propose a novel rate-control scheme in infrastructure based vehicular networks that avoids conges- tion and starvation and promotes fairness in end-to-end V2I communications. In vehicular networks, a bottleneck roadside unit (RSU) keeps track of its buffer size, aggregate incoming rate, and link throughput, and appropriately allocates bandwidth to traversing flows. With feedback information from the RSU, source nodes dynamically adjust their sending rates to avoid buffer overflow or starvation at the bottleneck RSU. Simulation results show that the proposed scheme can reduce not only packet losses owing to buffer overflow but also buffer starvation time, which improves the utilization efficiency of wireless channel resource.
基金
partially supported by the National Natural Science Foundation of China under Grant No.61101121
National High Technology Research and Development Programunder Grant No.2013AA102505
Key Laboratory Project Funds of Shenyang Ligong University under Grant No.4771004kfs03
Zhejiang Provincial Natural Science Foundation of China under Grant No.LY12F01021
Educational Committee of Liaoning Province science and technology research projects under Grant No.L2013096