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SUMMARY:(Research) Using Coverage Maps to Optimise Network Connectivity fo
 r Vehicles - David Cottingham
DTSTART:20081103T140000Z
DTEND:20081103T150000Z
UID:TALK13732@talks.cam.ac.uk
CONTACT:Andrew Rice
DESCRIPTION:Wireless connectivity for vehicles is a fast-growing market\, 
 with a plethora of different network technologies already in use. Surveys 
 of the numbers of\nIEEE 802.11b/g access points in cities point to hundred
 s to thousands of networks within each square kilometre\, with coverage ar
 eas that are not easily predicted due to the complexities of the urban env
 ironment. In order\nto take advantage of the diversity in wireless network
 s available\, we need data concerning their coverage. Methods of generatin
 g such coverage maps that are accurate\, space-efficient and easy to query
  are not a well addressed area. This talk will overview novel algorithms f
 or the creation of such coverage maps\, and how these have been evaluated 
 using a large corpus\nof real-world data. The conversion of coverage maps 
 into graph form to enable optimal network selection over a geographical ro
 ute\, whilst taking into account handover costs\, will also be described. 
 This is (to the author's knowledge!) the first approach of this kind\, par
 ticularly since it has been evaluated with real traces from a vehicle.
LOCATION:FW26\, William Gates Building
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