EP0335846A1

5G,4G

Title

Cellular digital mobile radio system with plural base station transmitters and method of transmitting information in such a system.

Application Number:

EP19890850040

Publication Date:

04-10-1989

Current Assignee:

FUMERO PATENTS SNC

Family ID:

20371525

Application Date:

08-02-1989

Publication Country:

US

View on Espacenet

Priority Date:

29-02-1988

Declaring Company:

ERICSSON INC

Abstract  Abstract

The invention relates to a cellular digital mobile radio system including base stations (Bm, Bn) and mobile stations MS₁, MS₂) with transmitters and receivers. The invention also relates to a method of transmitting message information digitally between mobile and base stations in such a system.
In accordance with the invention, at least two base station transmitters (Bma, Bmb, Bna, Bnb) at a given transmitting distance from each other are assigned to each of certain cells (Cm, Cn) within a restricted geographical area. The base station transmitters which are assigned to the same cell transmit digitally modulated radio signals within the same frequency range at least partially simultaneously to the mobile stations of the cell. The radio signals from different base stations transmitters associated with the same cell are digitally modulated with the same message information to the mobile stations in the cell.
Different base station transmitters (9A, 9B) preferably transmit the digitally modulated radio signals with the same message information to a given mobile station with a given mutual transmission time shift. Here, the transmission time shift is selected individually for each mobile station, such that corresponding digitally modulated radio signals with the same message information to a given mobile station from different base station transmitters arrive practically simul­taneously at the mobile station.

Note:

The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)

The information in grey was provided by the patent holder

The information in purple was extracted from the FrandAvenue

Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.

Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.

Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.

Family member:related patents or applications that share a common priority or original filing.

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