User-Centric Offloading to WLAN in WLAN/3G Vehicular Networks

被引:6
|
作者
Lee, SeungSeob [1 ]
Lee, SuKyoung [1 ]
机构
[1] Yonsei Univ, Dept Comp Sci, Seoul 120749, South Korea
关键词
WLAN; 3G cellular network; Vehicular network; Offloading; Mobility; Application usage pattern; Transmission time; PREDICTION;
D O I
10.1007/s11277-012-0788-y
中图分类号
TN [电子技术、通信技术];
学科分类号
0809 ;
摘要
In recent years, there has been a growing demand in 3G data services, leading to deteriorating 3G service quality. Noting that Wireless Local Area Networks (WLANs) as well as 3G cellular networks are widely available today, WLANs could be effectively utilized to relieve the overload in the 3G networks. On the other hand, use of IEEE 802.11 WLAN Access Points (APs) has proliferated tremendously, resulting in a communication device inside a mobile vehicle to access the Internet. However, using Internet through APs in moving vehicles is challenging since WLANAPs have a short range and are typically not deployed to cover all roads. Several studies have investigated the performance of using intermittently available WLAN connectivity from moving vehicles for data transfers and predictive off loading in WLAN/3G networks. However, these works have not addressed mobility pattern from the viewpoint that drivers' mobility is generally known to have a daily routine. Therefore, in this paper, we consider the user's historical mobility to decide to offload data to WLAN instead of switching to 3G network. The user's application usage pattern is also considered into predicting available WLANs. To evaluate the performance of our offloading algorithm, we analyze the prediction error and conduct simulations. The simulation results show that the proposed algorithm achieves shorter transmission time than the existing schemes that do not consider user's mobility pattern by delivering more data to the WLANs.
引用
收藏
页码:1925 / 1940
页数:16
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