May 2005
Intermediate to advanced
312 pages
10h 29m
English
Content preview from Mobile IP Technology and Applications
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64 Chapter 3: Mobile IP Security
timestamp and the current time is greater than the allowed interval, it rejects the registration
with an error code of 133, registration id mismatch. The Home Agent also updates the higher
32 bits with the current timestamp in the RRP. Upon receipt of the RRP, the Mobile Node
matches the sent RRQ message to the received reply by comparing the lower 32 bits and then
updating its time by computing an offset. The offset is the difference between the Mobile
Node’s time and the Home Agent’s time, plus the estimated latency of the link. The latency is
estimated by halving the time difference from when the RRQ was sent ...
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