TY - GEN
T1 - Quantifying caching effects in urban VANETs
AU - Bian, Chaoyi
AU - Zhao, Tong
AU - Li, Xiaoming
AU - Du, Xiaojiang
AU - Guizani, Mohsen
AU - Yan, Wei
N1 - Publisher Copyright:
© 2016 IEEE.
PY - 2016/9/12
Y1 - 2016/9/12
N2 - Most applications in urban Vehicular Ad hoc NETworks (VANETs) rely on information sharing, such as real-Time traffic information queries, advertisements, etc. However, existing data dissemination techniques cannot guarantee satisfactory performance when a lot of information requests come from all around the network. Because these pieces of information are useful for multiple users located in various positions, it is beneficial to spread the cached copies around. Existing work proposed caching mechanisms and conducted simulations for validation, but there is a lack of theoretical analysis on the explicit caching effects. In this paper, we present the cache coverage ratio as the metric to quantify the caching effects, and theoretical analysis is given based on reasonable assumptions for urban VANETs, through which we find the affecting factors include vehicle density, transmission range, ratio of caching vehicles, etc. We deduce the quantitative relationship among them, which have similar forms as the cumulative density function of an exponential distribution. We conduct intensive simulations, which verify the theoretical analysis results match quite well with the simulated reality under different scenarios.
AB - Most applications in urban Vehicular Ad hoc NETworks (VANETs) rely on information sharing, such as real-Time traffic information queries, advertisements, etc. However, existing data dissemination techniques cannot guarantee satisfactory performance when a lot of information requests come from all around the network. Because these pieces of information are useful for multiple users located in various positions, it is beneficial to spread the cached copies around. Existing work proposed caching mechanisms and conducted simulations for validation, but there is a lack of theoretical analysis on the explicit caching effects. In this paper, we present the cache coverage ratio as the metric to quantify the caching effects, and theoretical analysis is given based on reasonable assumptions for urban VANETs, through which we find the affecting factors include vehicle density, transmission range, ratio of caching vehicles, etc. We deduce the quantitative relationship among them, which have similar forms as the cumulative density function of an exponential distribution. We conduct intensive simulations, which verify the theoretical analysis results match quite well with the simulated reality under different scenarios.
KW - VANET
KW - analysis
KW - cache
KW - simulation
UR - http://www.scopus.com/inward/record.url?scp=84989885798&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84989885798&partnerID=8YFLogxK
U2 - 10.1109/WCNC.2016.7564926
DO - 10.1109/WCNC.2016.7564926
M3 - Conference contribution
AN - SCOPUS:84989885798
T3 - IEEE Wireless Communications and Networking Conference, WCNC
BT - 2016 IEEE Wireless Communications and Networking Conference, WCNC 2016
T2 - 2016 IEEE Wireless Communications and Networking Conference, WCNC 2016
Y2 - 3 April 2016 through 7 April 2016
ER -