This paper proposes a new application framework for group tour guiding
services based on RFIDs and wireless sensor networks. We consider a
sensing field mixed with multiple independent tourist groups, each with a
leader and several members.
Members of a group will follow the moving path of their leader, but may
occasionally roam around randomly on their own interests. Sensor nodes
have to track leaders' locations and maintain guiding paths from members to
leaders.
A member may inquire where his/her leader is, and a leader may "recall"
his/her members. We propose a feasible solution to such an application by
using existing technologies and off-the-shelf components. A group guiding
protocol is presented. The design enables
