Method for supervising TDMA radio frequency communications
US5546380A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 1995 |
| Grant date | Aug 13, 1996 |
| Priority date | — |
| Expiry date | Jan 24, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W76/30
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A unique method for supervising a cellular telephone call between a base station and a radio telephone of a TDMA cellular communications system includes the steps of determining (304) that the assigned time slot is expected to be received within a predetermined amount of time; detecting the presence of the assigned time slot (306) within the predetermined amount of time; detecting the presence of the assigned DVCC when the assigned time slot is detected (308); incrementing a bad slot counter (316) [if] responsive to the assigned time slot is not detected within the predetermined amount of time or [if] responsive to the assigned DVCC is not detected; and terminating the communication (322) [if] when the bad slot counter reaches a predetermined maximum value. A good slot counter is incremented (310) when the assigned DVCC is detected in a burst. The good slot counter is reset (318) [if] when the assigned DVCC is not detected in the next burst, and both counters are reset (314) [if] when the assigned DVCC is detected in consecutive bursts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.