| 摘要 |
The location of group members having mobile communications devices such as cellular telephones, PDAs, and the like are managed by maintaining group member location awareness among the individual group members. The location of each group member is known on the basis of the determined location of the mobile communications device of each, either in absolute terms or in relative terms. The absolute and/or relative location may be reported by the mobile communications devices, such as to a mobile communications device of an administrator of the group or directly to individual group members. Rules may be established for providing notifications such as alerts and alarms to the group members when a group member strays from the group or from a fixed reference point and information may be provided to the straying member to assist the straying member in returning to the group.
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