Method of covering shadow areas in a cellular mobile radio syste

Details Method of covering shadow areas in a cellular mobile radio syste Method of covering shadow areas in a cellular mobile radio syste

1994-07-20

1997-08-19

Urban, Edward F.

Telecommunications

Carrier wave repeater or relay system

Two separate way transmission

455 20, 455422, H04B 714

Patent

active

056598793

ABSTRACT:
A mobile radio network comprises a base transceiver station for transmitting and receiving radio signals to and from mobiles on different basic frequencies and a radio booster for receiving, amplifying and retransmitting radio signals to and from at least one shadow area. To cover the shadow areas a radio signal received by a radio booster from the base transceiver station on a basic frequency is retransmitted to a mobile station on a translated frequency different from the basic frequency and associated with the latter by a translation law. This law is such that, firstly, each of the basic frequencies is either associated with at least one translated frequency or is not associated with any translated frequency and, secondly, the difference between the value of a translated frequency and the value of the associated basic frequency is not the same for all the translated frequencies. A radio signal received by a radio booster from a mobile on a translated frequency is retransmitted to the base transceiver station on the associated basic frequency.

REFERENCES:
patent: 4783843 (1988-11-01), Leff et al.
patent: 5168574 (1992-12-01), Gordon et al.
patent: 5179720 (1993-01-01), Grube et al.
French Search Report FR 9309426.

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