Method of establishing a radio link in one of a plurality of channels between two radio units
US4995083A · kind A · utility
61Cited by
3References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 31, 1989 |
| Grant date | Feb 19, 1991 |
| Priority date | — |
| Expiry date | Jul 31, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/727
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The method comprises transmitting an initiating signal in the form of a bit pattern as a continuous burst from one radio unit to the other. The pattern incorporates a preamble pattern and a security code having a plurality of bit sequences. Each sequence is transmitted a number of times. The received security code is compared with stored codes in the other unit, and if a matching pair is identified a response signal is transmitted from the other unit to said one unit. The response signal incorporates the preamble pattern for establishing synchronization between the radio units.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.