
106 ◾ Security for Multihop Wireless Networks
an adapted version of Proxy Mobile IP for multihop domains [14]. In addition to
the adaptive PMIP, we also add the strict requirement for the MN to first connect
directly to an MAG, in order to obtain a valid IP prefix in the domain. As illus-
trated in Figure 5.2, once an MN, such as a vehicle, joins the domain for the first
time, it sends router solicitation (RS) messages, which are employed by the MAG
as a hint for detecting the new connection. After the PMIP signaling has been com-
pleted, the MAG announces the IP prefix in a unicast router advertisement (RA)
message delivered to the MN over the one-h ...