NDLI: Extending the reach of infrastructure by utilizing node mobility

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Extending the reach of infrastructure by utilizing node mobility

Content Provider	ACM Digital Library
Author	Jingdong, Xu Ying, Wu Zhen, Yu
Abstract	With the advantage of high bandwidth and low cost, WLAN is widely regarded as an appealing technology for wireless access. However, WLAN only provides very limited coverage which is no more than hundreds of meters, making users experience intermittent connectivity when they move near Wi-Fi access points (AP). To fill in the gaps between APs, we present a new framework, which combines infrastructure composed of APs with the concept of DTN to improve network performance. In particular, when a mobile client has moved out of the reach of the infrastructure, our framework predicts the trajectory of this client and lets the APs in the proximity identify suitable relay nodes among the mobile clients that happen to visit those APs. If some passing by mobile clients have a chance to encounter the target client soon, the corresponding AP(s) will transfer the data destined to the target client to those mobile clients, in the hope that they will accomplish the delivery in a "store-carry-forward" fashion. In this way, the target client may be able to receive data even before it arrives at an AP. Our evaluation shows that our framework fairly improves the performance in terms of both delivery delay and delivery ratio, with controlled overhead.
Starting Page	63
Ending Page	72
Page Count	10
File Format	PDF
ISBN	9781450310963
DOI	10.1145/2107596.2107603
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2011-12-07
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Infrastructure Mobile networks Wlan Dtn
Content Type	Text
Resource Type	Article

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