INTEGRATED RADIO COMMUNICATIONS SYSTEM USING AN ORDERED HIERARCHICAL CELLULAR COVERAGE
First Claim
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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Abstract
An integrated radio communication system with ordered hierarchical cellular coverage comprises a first system and a second system, the coverage of the second system covered by the coverage of the first system, and a set of dual-mode terminals that can selectively use the first system or the second system. The first and second systems are configured to simultaneously share a common portion Bc of a first band B1 of frequencies respectively on a first uplink and a second uplink, and respectively manage first transmission resources and corresponding second transmission resources. The second radio communication system of lower level N2 is free to manage its second transmission resources without any coordination constraint with respect to the first system of higher level N1, whereas the first system of higher level is configured to not disturb the second system in the common frequency band portion. The first system is configured to transmit data packets on a first uplink random access contention channel and to manage its first resources optimally in terms of transmission capacity of the channel as a function of the measurement of the occupancy of the second radio resources currently used by the second system and of the first resources currently used by the first system.
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Citations
16 Claims
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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:
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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 wherein the 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, and the first system of higher level N1 being configured to not disturb the second system in the common frequency band portion Bc; said integrated system wherein the 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, then by 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A cellular radio communication method, implemented by an integrated radio communication system with ordered hierarchical cellular coverage, wherein a cell of higher level coverage covers one or more cells of lower level,
the integrated radio communication 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; the first system and the second system being configured to simultaneously share a common portion Bc of a first band B1 of frequencies 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 radio communication system of lower level being free to manage its second transmission resources without any coordination constraint with respect to the first system of higher level, and the first system of higher level N1 being configured to not disturb the second system in the common portion Bc of the common frequency band; said radio communication method comprising the steps wherein in a first step, a first set of dual-mode terminals connected to the first system transmit data packets on a first uplink random access contention channel by using first shared resources of the common portion Bc of the first band, and a second set of terminals, connected to the second system, use second resources of the common portion of the first band B1;
thenin a second step, the first system measures, on the first relay station, 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;
thenin a third step, 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 first system determines the first shared 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 coverage of the second system so as to optimize the transmission capacity of the random channel;
thenin a fourth step, the first system notifies, using a signalling channel broadcast on the downlink to the dual-mode terminals, not located in the coverage of the second system, the relevant information concerning the first resources to be used and determined in the third step. - View Dependent Claims (16)
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Specification