Frame structure having non-symmetrical slot assignments for mobile communications
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United States of America Patent
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Jan 20, 1998
Issued Date -
N/A
app pub date -
Jun 6, 1995
filing date -
Oct 29, 1993
priority date (Note) -
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status (Latency Note)
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Abstract
An improved frame structure for use in mobile communications systems utilizing slotted protocols is provided. According to the present invention, consecutive slots in a frame are assigned to each mobile unit so that the mobile unit transmits to a base station during the first slot and receives a transmission from the base station during the second slot. This frame structure, permits the mobile unit to monitor various frequencies for a longer and more continuous period of time. It is important for the mobile unit to have enough time to monitor frequencies while it is not transmitting or receiving so that base station handoff and interference avoidance handoff techniques can be performed by the mobile communications system. Furthermore, according to the frame structure provided by the present invention, the mobile units can be designed with a standard frequency synthesizer. The improved frame structure also allows channel distortion to be minimized by providing adaptive equalization with transmit precompensation and/or antenna diversity in the base stations.
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