The Internet Engineering Task Force lists multicasting as a desired se
rvice for our future mobile computing environment. To provide this ser
vice, location management of a group of users involved in a multicasti
ng application needs to be addressed. In this paper, we propose two pr
otocols that can be used by a group of mobile hosts to share their cur
rent location with other group members efficiently. (C) Elsevier Scien
ce Inc. 1997.