Wireless communication system using distributed switched antenna

Details Wireless communication system using distributed switched antenna Wireless communication system using distributed switched antenna

1994-09-12

1997-05-06

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at separate stations

455 331, 455 541, 370334, H04Q 738

Patent

active

056280521

ABSTRACT:
Increased coverage and macro diversity from a single base station in a wireless communication system by having a base station coupled to N antennas is described. Increased coverage and macro diversity are achieved by transmitting from the base station N control messages each via one of the antennas, and transmitting a data message addressed to a mobile unit via a particular one of the antennas previously assigned to the mobile unit for an active call. The mobile unit receives the control messages and the data message and analyzes the control messages to identify from the antennas a best antenna. The mobile unit then transmits to the base station a new antenna request identifying the best antenna in an uplink control slot of a frame. The uplink control field is associated with the particular one of the antennas. The base station uses the best antenna to transmit subsequent data messages addressed to the mobile unit. A random access technique, to allow mobile units that are going from an inactive status to an active status, is provided by connecting all base station antennas together during non-call-affiliated slots in the uplink portion of the frame.

REFERENCES:
patent: 4513412 (1985-04-01), Cox
patent: 4797947 (1989-01-01), Labedz
patent: 5164942 (1992-11-01), Kamerman et al.
patent: 5241701 (1993-08-01), Andoh
patent: 5260944 (1993-11-01), Tomabechi
patent: 5276920 (1994-01-01), Kuisma

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