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INTEGRATED RADIO COMMUNICATIONS SYSTEM USING AN ORDERED HIERARCHICAL CELLULAR COVERAGE

  • US 20170245185A1
  • Filed: 02/10/2017
  • Published: 08/24/2017
  • Est. Priority Date: 02/22/2016
  • Status: Active Grant
First Claim
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1. An integrated radio communication system with ordered hierarchical cellular coverage in which a cell of higher level coverage covers one or more cells of lower level, said integrated system comprising:

  • a first radio communication system having a first coverage level N1 and a first relay station and a second radio communication system having a second coverage level N2 and a second relay station, the first coverage level N1 being higher than the second coverage level N2; and

    a set of dual-mode terminals configured to selectively use the first system or the second system;

    said integrated system whereinthe first system and the second system are configured to simultaneously share a common portion Bc of a first frequency band B1 respectively on a first uplink for access to the first relay station and a second uplink for access to the second relay station, and respectively manage first shared transmission resources and second transmission resources which use the common portion Bc of the first band B1;

    the second transmission system of lower level N2 being free to manage its second transmission resources without any coordination constraint with respect to the first system of higher level N1, andthe first system of higher level N1 being configured to not disturb the second system in the common frequency band portion Bc;

    said integrated system whereinthe first system is configured to transmit data packets on a first uplink random access contention channel and to manage its first resources on said random channel, characterized by time slots and/or frequency slots and/or access codes, optimally in terms of transmission capacity of the random channel,by measuring, at the first relay station, the transmission resource occupancy of the second radio resources currently used by the second system and of the first shared resources currently used by the first system, thenby determining, as a function of the measurement of the occupancy of the second radio resources currently used by the second system and of the first shared resources currently used by the first system, the shared first resources, in terms of time slots and/or frequency slots and/or access codes, to be used by new dual-mode terminals not located in the cellular coverage of the second system, so as to optimize the transmission capacity of the random channel;

    thenby notifying, using a signalling channel broadcast on a downlink to the dual-mode terminals, not located in the cellular coverage of the second system, the first resources to be used and determined previously.

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