Utilizing the dropped packets for data delivery in VANETs  

作　　者：SONG Chao LIU Ming GONG Hai-gang CHEN Gui-hai CAO Jian-nong 

机构地区：[1]School of Computer Science and Engineering, University of Electronic Science and Technology of China [2]School of Computer Science and Engineering, Shanghai Jiao Tong University [3]Internet and Mobile Computing Laboratory, Department of Computing, Hong Kong Polytechnic University

出　　处：《The Journal of China Universities of Posts and Telecommunications》2013年第3期48-52,共5页中国邮电高校学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (60903158, 61003229, 61170256, 61173172, 61103227);the Fundamental Research Funds for the Central Universities (ZYGX2010J074)

摘　　要：Timely and cost-efficient multi-hop data delivery among vehicles is essential for vehicular ad-hoc networks （VANETs）, and various routing protocols are envisioned for infrastructure-less vehicle-to-vehicle （V2V） communications. Generally, when a packet （or a duplicate） is delivered out of the routing path, it will be dropped. However, we observe that these packets （or duplicates） may also be delivered much faster than the packets delivered along the original routing path. In this paper, we propose a novel tree based routing scheme （TBRS） for ultilizing the dropped packets in VANETs. In TBRS, the packet is delivered along a routing tree with the destination as its root. And when the packet is delivered out its routing tree, it won＇t be dropt immediately and will be delivered for a while if it can arrive at another branch of the tree. We conduct the extensive simulations to evaluate the performance of TBRS based on the road map of a real city collected from Google Earth. The simulation results show that TBRS can outperform the existing protocols, especially when the network resources are limited.Timely and cost-efficient multi-hop data delivery among vehicles is essential for vehicular ad-hoc networks （VANETs）, and various routing protocols are envisioned for infrastructure-less vehicle-to-vehicle （V2V） communications. Generally, when a packet （or a duplicate） is delivered out of the routing path, it will be dropped. However, we observe that these packets （or duplicates） may also be delivered much faster than the packets delivered along the original routing path. In this paper, we propose a novel tree based routing scheme （TBRS） for ultilizing the dropped packets in VANETs. In TBRS, the packet is delivered along a routing tree with the destination as its root. And when the packet is delivered out its routing tree, it won＇t be dropt immediately and will be delivered for a while if it can arrive at another branch of the tree. We conduct the extensive simulations to evaluate the performance of TBRS based on the road map of a real city collected from Google Earth. The simulation results show that TBRS can outperform the existing protocols, especially when the network resources are limited.

关 键 词：ROUTING VANET opportunistic forwarding 

分 类 号：TN919.3[电子电信—通信与信息系统]