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be a result of better received signals from the new node or better channel conditions
to the new node. Whichever one of these is involved, there are delays to consider
during handoff.
e initial design of SIP did not consider mobility management of the end nodes
an issue and hence mobility management using SIP is an afterthought. However,
to support real-time applications, it is essential to address the mobility of nodes to
ensure that there is no disruption of communication due to lost attachment and
poor link quality. In the mobility management scheme described in Figure 11.2,
during an active commun ...