Mobile radio communication control system for preventing erroneous reception of control signals
US4144409A · kind A · utility
77Cited by
2References
2Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Aug 30, 1977 |
| Grant date | Mar 13, 1979 |
| Priority date | — |
| Expiry date | Aug 30, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W16/02
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A mobile radio communication system utilizes message channels of the same frequencies in separate geographic zones. Also, zones utilizing the same message channels are assigned distinguishing control codes which are transmitted with control signals to prevent control signals related to one zone from interfering with communications with another zone using the same message frequencies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.