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Cheng, PY
Languages: English
Types: Doctoral thesis
Subjects:

Classified by OpenAIRE into

ACM Ref: ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS
This thesis presents a proof of concept that context information can be\ud distributed in a heterogenous network environment by employing a network layer\ud protocol, i.e. the CLAWD (Context and Location Aware Wireless Devices) protocol.\ud The inspiration for the protocol was based on the idea that a wireless device should\ud know the location and context of other wireless devices within its local vicinity and\ud across wireless technology. The design of CLAWD protocol utilises a pro-active\ud broadcast approach with generic context information embedded in its Protocol Data\ud Unit (PDU). A CLAWD table for an individual device was also developed to\ud encapsulate context information of other wireless devices and their relationships,\ud consequently, it provides a reconstructable network topology. Wireless technologies\ud based on the IEEE 802.11 standard and the Bluetooth specification were chosen to\ud represent the independence of wireless technology, and the functionality of CLAWD\ud protocol was designed and developed using network simulator 2 (NS-2). The simulated\ud results indicate that conveying context and location information using CLAWD\ud protocol is feasible, and furthermore, this technique is readily adaptable over existing\ud wireless technologies. The research demonstrates a communication protocol which can\ud exchange context and location information amongst wireless devices in a ubiquitous\ud environment, and it provides a context service for various wireless devices at the\ud network layer.
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