Selecting which main base station for an infill base station to monitor in a mobile radio system
First Claim
1. A method for selecting a channel in a mobile radio system, the geographical coverage area of which is divided into a plurality of radio cells, each radio cell comprising a main base station indicated by an identifier, at least one said radio cell further comprising at least one infill base station, said method comprising the steps of:
- (a) signalling by each said main base station with subscriber stations on a respective control channel having a respective downlink frequency for signalling from the respective base stations to subscriber stations and a respective uplink frequency for signalling from each respective subscriber station to a respective said base stations,(b) monitoring by a said infill base station respective of the subscriber stations at the uplink frequency of the control channel of a respective said main base station,(c) measuring by the respective infill base station the quality of the downlink control channels of predetermined ones of said main base stations, and(d) selecting by the respective infill base station on the basis of the quality of the downlink frequencies of said downlink control channels, a one of said main base stations the uplink frequency of the control channel of which main base station the respective infill base station begins to monitor in continuation of or in place of the one being monitored in step (b).
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Accused Products
Abstract
A method for selecting a channel and a base station in a mobile radio system, the geographical coverage area of which is divided into radio cells, each radio cell including a main base station indicated by an identifier, and at least one of the radio cells including at least one infill base station. In the method, the main base station signals with subscriber stations on a control channel having a downlink frequency for signalling from a base station to a subscriber station and an uplink frequency for signalling from a subscriber station to a base station. Each infill base station monitors the subscriber stations at the uplink frequency of the control channel of the respective main base station. To select the best possible main base station, each infill base station measures the quality of the control channels of predetermined ones of the main base stations and selects, on the basis of the quality of the downlink frequencies of the control channels, a main base station the uplink frequency of the control channel of which it begins to monitor.
22 Citations
11 Claims
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1. A method for selecting a channel in a mobile radio system, the geographical coverage area of which is divided into a plurality of radio cells, each radio cell comprising a main base station indicated by an identifier, at least one said radio cell further comprising at least one infill base station, said method comprising the steps of:
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(a) signalling by each said main base station with subscriber stations on a respective control channel having a respective downlink frequency for signalling from the respective base stations to subscriber stations and a respective uplink frequency for signalling from each respective subscriber station to a respective said base stations, (b) monitoring by a said infill base station respective of the subscriber stations at the uplink frequency of the control channel of a respective said main base station, (c) measuring by the respective infill base station the quality of the downlink control channels of predetermined ones of said main base stations, and (d) selecting by the respective infill base station on the basis of the quality of the downlink frequencies of said downlink control channels, a one of said main base stations the uplink frequency of the control channel of which main base station the respective infill base station begins to monitor in continuation of or in place of the one being monitored in step (b). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An infill base station of a mobile radio system, comprising:
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a radio transceiver, a controller unit for controlling said infill base station, comprising means for measuring the quality of the control channels of a plurality of predetermined main base stations of said mobile radio system and for selecting, on the basis of the quality of the downlink frequencies of the control channels, the main base station the uplink frequency of the control channel of which the base station begins to monitor. - View Dependent Claims (11)
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Specification