Fast Algorithms for Mining Association Rules in Large Databases
VLDB '94 Proceedings of the 20th International Conference on Very Large Data Bases
Proceedings of the 4th ACM SIGCOMM conference on Internet measurement
Usage-based dhcp lease time optimization
Proceedings of the 7th ACM SIGCOMM conference on Internet measurement
A first look at mobile hand-held device traffic
PAM'10 Proceedings of the 11th international conference on Passive and active measurement
A comparative study of handheld and non-handheld traffic in campus Wi-Fi networks
PAM'11 Proceedings of the 12th international conference on Passive and active measurement
Over the top video: the gorilla in cellular networks
Proceedings of the 2011 ACM SIGCOMM conference on Internet measurement conference
Locating emergencies in a campus using wi-fi access point association data
Proceedings of the 2013 ACM conference on Pervasive and ubiquitous computing adjunct publication
Characterizing WiFi connection and its impact on mobile users: practical insights
Proceedings of the 8th ACM international workshop on Wireless network testbeds, experimental evaluation & characterization
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The Dynamic Host Configuration Protocol (DHCP) was introduced nearly 20 years ago as a mechanism for hosts to automatically acquire IP addresses. While the protocol remains the same, its usage has evolved, especially in the last decade with the introduction of mobile devices and wireless local area networks. In this paper we investigate the impact that new types of wireless devices, such as smartphones, have on DHCP. We use two one-month long traces, collected at a corporate and an educational network, and we compare side-by-side DHCP usage patterns. We develop a novel passive fingerprinting technique based on DHCP messages to determine the device type and operating system. We show that DHCP implementations vary among device types and have an effect on DHCP lease durations. To improve network address utilization, without introducing any protocol changes, we propose a new leasing strategy which takes into account device types. This strategy, compared to current approaches, improves the address utilization without considerably increasing DHCP overhead.