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EP0564429A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Cell extension in a cellular telephone system

Assignee: Telefonaktiebolaget LM Ericsson AB
•
Filing: 1993-03-29
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Granted: —
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Expires: 2013-03-29
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Abstract

Abstract In a cellular telephone system of the type having TDMA channels, the beginnings of the time slots of an uplink transmission are offset from the beginnings of the time slots of a downlink transmission by a predetermined amount. By offsetting the beginnings of the time slots, a mobile station is able to operate at an extended distance from the base station without any modifications to the mobile station. Because the mobile stations can operate at a greater distance from the base station without a decrease in the number of available channels, the cellular telephone system is particularly suitable for use in rural areas or coastal areas.

Inventors

  • 👤 Stig Roland Bodin
  • 👤 Georg William Robin Chambert

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-25 21:40
CPC Classifications
H; H04; H04W; H04W16/00; H04W16/24; H04W16/26

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 87 words
In a radio communication system of the type having radio signals which are divided into time slots, comprising: a first base station for communicating signals during first uplink time slots; and a first mobile station for communicating signals to the first base during first downlink time slots which are offset by a predetermined amount from the beginning of the first uplink time slots of the first base station; wherein the first mobile station is able to operate at a substantially increased distance from the first base station.
Claim 2
Dependent Claim 32 words
A radio communication system according to claim 1 wherein the first base station further communicates with signals having second uplink time slots which are substantially longer than the first uplink time slots.
Claim 3
Dependent Claim 28 words
A radio communication system according to claim 2 wherein the first uplink time slots correspond to dedicated channels and the second uplink time slots correspond to access channels.
Claim 4
Dependent Claim 45 words
A radio communication system according to claim 1 wherein the coverage area, in which the first base station and the first mobile station can communicate with one another during the first uplink time slots and the first downlink time slots, includes a ring shaped area.

References Cited (Backward Citations)

No citation records indexed.

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