Method and apparatus for distance-based notification in a two-way wireless communication system
US6351221B1 · kind B1 · utility
35Cited by
3References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 15, 1999 |
| Grant date | Feb 26, 2002 |
| Priority date | — |
| Expiry date | Jun 15, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W4/06
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A group selected from a plurality of portable subscriber units (122) is defined (402), and a plurality of locations corresponding to members of the group are identified (404) by a controller (112) in cooperation with a base station and the group members. The controller determines (406) from the plurality of locations at least one distance between selected ones of the members, and sends (408) a notification when the at least one distance satisfies a predetermined set of rules.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.