Opportunistic WiFi offloading in vehicular environment: A queueing analysis

Nan Cheng, Ning Lu, Ning Zhang, Xuemin Sherman Shen, Jon W. Mark
2014 2014 IEEE Global Communications Conference  
In this paper, we present an analytical framework for offloading cellular traffic by outdoor WiFi network in the vehicular environment. Specifically, we consider a generic vehicular user with Poisson data service arrivals to download/upload data from/to the Internet through the cost-effective WiFi network (want-to) or the cellular network providing full service coverage (have-to). Under this scenario, the WiFi offloading performance, characterized by offloading effectiveness, is analyzed in
more » ... s of desired average service delay which is the average time the data services can be deferred for WiFi availability. We establish an explicit relation between offloading effectiveness and average service delay by an M/G/1/K queueing model, and the tradeoff between the two is examined. We validate our analytical framework through simulations based on a VANET simulation tool VANETMobisim and real map data sets. Our analytical framework should be valuable for providing offloading guidelines to both vehicular users and network operators.
doi:10.1109/glocom.2014.7036809 dblp:conf/globecom/ChengLZSM14 fatcat:ppujnfb3yrdc7prigidiw4qwma