Method of transmitting call information in a short range mobile telephone system and a radio unit for carrying out the method
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United States of America Patent
Stats
-
Jul 28, 1992
Grant Date -
N/A
app pub date -
Jun 8, 1989
filing date -
Oct 17, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of transmitting calls between a radio base station (FS) and one or more portable radio telephones (PS) which are at a short distance from the base station. The base stations of the mobile radio system all have access to all carrier frequencies (f.sub.1 -f.sub.4) and transmit/receive call information with the aid of time division multiple access (TDMA). The transmission from a base station (FS) to a radio telephone (PS) occupies time slots (CH1-CH16) within one half of a frame interval and the reception occupies time slots within the other half. When a channel occupies a time slot (CH1) for transmission/reception over a given carrier frequency (f.sub.1) the remaining carrier frequencies are blocked for precisely this time slot, and a second time slot with the same (f.sub.1) or a second carrier frequency (f.sub.1 -f.sub.4) shall be used for a second channel. A radio unit for carrying out the method is described.
First Claim
Family
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Cited Art Landscape
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