Apparatus and method for selecting a transmitter for directed message delivery
US5878352A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1996 |
| Grant date | Mar 2, 1999 |
| Priority date | — |
| Expiry date | Dec 20, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W88/185
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and the corresponding messaging system of selecting a transmitter for directed message delivery set is a messaging system including a plurality of transmitters arranged and constructed to operate in a simulcast or non-simulcast mode, the method including directing a first and a second transmitter to transmit in the simulcast mode, respectively, a first signal including a reference parameter and a first identification signal and a second signal including the reference parameter and a second identification signal, the first identification signal and the second identification signal distinguished from the reference parameter by, respectively, a first and a second predetermined amount, and receiving an acknowledgment signal that includes a indication of the first identification signal relative to the second identification signal or both relative to a threshold as determined at a messaging unit location, the indication corresponding to a preferred transmitter, selected from the first and the second transmitter, for a directed message delivery to the messaging unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.