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Cellular cordless telecommunications system

  • US 6,226,515 B1
  • Filed: 11/19/1997
  • Issued: 05/01/2001
  • Est. Priority Date: 05/31/1995
  • Status: Expired due to Fees
First Claim
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1. A cellular cordless telecommunications system comprising:

  • (a) a large number of cordless base stations which are arranged in radio cells in the cellular cordless telecommunications system and are connected to a wire-based switching center for intercellular telecommunications or telecommunications between cells;

    (a1) the switching center having at least one S0 interface for a basic access multi-device line S0; and

    (a2) each of the cordless base stations having link means for producing an intercellular telecommunications link or a telecommunications link between cells with an S0 transmitting stage constructed in accordance with a ISO/OSI layer model and with an S0 receiving stage in accordance with the ISO/OSI (International Organization of Standardization/Open Standardization/Open System Interconnection) layer model, the transmitting and receiving stages being connected to the S0 interface via an S0 bus having two B channels and one D channel;

    (b) at least one cordless mobile unit which telecommunicates with the cordless base stations;

    (c) the cordless base stations, in a master-slave configuration having a master cordless base station and at least one slave cordless base station connected to the S0 interface of the switching center;

    (d) the master cordless base station and the at least one slave cordless base station being structured in terms of the link means such that, once a layer 1 of the S0 transmitting stage and of the S0 receiving stage has been set up in accordance with the ISO/OSI layer model, a synchronization message is transmitted between the cordless base stations connected to the S0 interface, on the S0 bus from the master cordless base station to the at least one slave cordless base station.

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