Joint Congestion and Medium Access Control in Cooperative Vehicular Ad-Hoc Networks
In this paper, we address the congestion andmedium access control (MAC) problem for cooperative vehicularad-hoc networks (VANETs) in the framework of utility functionmaximization. Compared to its counterpart in a wired networkwhere link capacities are assumed to be fixed, congestion controlin a multi-hop cooperative VANETs is much more complex andrequires joint optimization at both the transport layer and theMAC layer. This is due to the fact that the attainable functionvalue on each path in the network is “elastic which resultsin typically non-convex (non-concave) or non-separable functionof the transmission attempt rates. A new cross-layer algorithmis proposed to solve the system problem with constraints thatarise from the cooperation among the users and contention forthe wireless channel access. The algorithm works at the MAClayer to adjust link persistence probability and at the transportlayer to adjust flow rates joitly, and it is designed in distributedmanner that is amenable to on-line implementation for VANETs.We prove rigorously that the proposed algorithm converges tothe globally optimal solution.
Liang Zhou Baoyu Zheng
Electrical Engineering Department, Shanghai Jiao Tong University; Institute of Signal Processing and Institute of Signal Processing and Transmission, Nanjing University of Posts and Telecommunications;
国际会议
2007年通信、电路与系统国际会议(2007 International Conference on Communications,Circuits and Systems Proceedings)
日本福冈
英文
2007-07-11（万方平台首次上网日期，不代表论文的发表时间）