When we started this thesis last year, there is basically no related work. Some papers proposed use the mobility information to reduce the bad links.
	For example, in FORP, every packet contains the link expiration time, so the destination can predict the topology change and decide if the route needs hand off. The ABR and SSA favor the longer-live routes to reduce route maintenance.
	One paper published this month in MobiCom 2001, uses reception signal power strength, and sends warning to the source if the route is likely to be broken. But this paper uses different metrics like preemptive zone and packet latency. Also, implemented this preemptive routing in DSR caused at least twice increased overhead.