April 2016
Intermediate to advanced
715 pages
26h 17m
English
Content preview from Handbook on Mobile and Ubiquitous Computing
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Handbook on Mobile and Ubiquitous Computing: Status and Perspective
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Ring ID = 2
Ring ID = 1
Ring ID = 4
Ring ID = 3
Figure 26.3 Overview of location update.
The second case is more difficult, when a mobile host leaves the LA by entering into cells 21–27
via boundary cells located in the lower two sides of the LA rhombus, i.e., cells A, B, C, D, E, F,
and G in Figure 26.3. In this case, it is impossible to know whether the mobile host leaves the LA
by distance. So, direction information is needed in this case. When a mobile host changes cells,
it checks the CRID. If it is equal to or smaller than the distance threshold ...
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