att_abstract={{Cellular networks have witnessed tremendous traffic growth
recently, fueled by the rapid proliferation of smartphones,
laptops with mobile data cards, and new technologies improving
the performance of these networks. However, unlike
the wired world, there exists a rather limited understanding
of the application mixes and the characteristics of this traffic.
Recent studies have shown that in the wired broadband
world, HTTP traffic accounts for the vast majority of the application
traffic and that forward caching of HTTP objects
results in substantial savings in network resources. What
about cellular networks? The answer is a function of the
traffic characteristics, network architecture, as well as the
various cost points associated with delivering traffic in these
networks. In this paper, we examine the characteristics of
HTTP traffic generated by millions of users across one of
the world�s largest 3G cellular networks, and explore the potential
of forward caching. We provide a simple cost model
that third parties can easily use to determine the cost-benefit
tradeoffs for their own cellular network settings. This is the
first large scale caching analysis in cellular networks.}},
	att_authors={je925g, ag1971, mh0357, dp8327, ss2864, os1872},
	att_categories={C_IIS.1, C_NSS.7, C_NSS.8},
	att_copyright_notice={{This version of the work is reprinted here with permission of IEEE for your personal use. Not for redistribution. The definitive version was published in IEEE Internet Computing,  2011. {{, 2011-01-01}} }},
	att_tags={UMTS, forward caching, cellular networks},
	author={Jeffrey Erman and Alexandre Gerber and Mohammad Hajiaghayi and Dan Pei and Subhabrata Sen and Oliver Spatscheck},
	institution={{IEEE Internet Computing}},
	title={{To Cache or not to Cache: The 3G case}},