Radio data protocol communications system and method

Details Radio data protocol communications system and method Radio data protocol communications system and method

1988-09-09

1990-11-20

Safourek, Benedict V.

Telecommunications

Transmitter and receiver at separate stations

Single message via plural carrier wave transmission

455 53, 455 57, 455 58, 34082508, H04Q 702

Patent

active

049725076

ABSTRACT:
A method and system of radio data communications especially useful in communicating over a special communications channel between a base station or cell site of a cellular telephone system and one of many user stations. Each user station communicates an alarm condition which may be either a burglar type alarm or an environmental alarm to the base station by responding on a compelled basis to a status request from the user station. The responses to such request are prevented from overlapping by fixed and unique time delays for each user station. This status response requires substantially a single bit width of data. If no response is received, this is also sensed. Secondly, a different category of request acquires from each selected user station several bits of data constituting an informational message, the request being sent to each user station in a cell in sequence, along with the particular unique time delay for each user station. Then the response are received in a group in sequence and are prevented from overlapping by use of these unique time delays.

REFERENCES:
patent: 4466001 (1984-10-01), Moore et al.
patent: 4586040 (1986-04-01), Akiba et al.
patent: 4696052 (1987-09-01), Breeden

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