Apparatus and associated method for selectively permitting initiation or cell reselection in a radio communication system
AssigneeNokia Corporation
InventorsThomas A. Sexton, Riku P. Pirhonen
Life of this patent
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Abstract
A method, and associated apparatus, predicts the likelihood of successful effectuation of handover in a cellular communication system. Handover is permitted only if the predicted likelihood is at least as great as a minimum threshold. If the predicted likelihood is less than the minimum threshold, a request is made to increase the coding rate of control signals used pursuant to the handover procedure. Handover is permitted only when the likelihood of success is predicted to be high. Thereby, the possibility of loss of communications during handover procedures is reduced.
Claims21
A method for selectively initiating effectuation of a control-channel-intensive event for communications by a mobile station in a radio communication system having a serving-cell fixed-site radio transceiver and at least one target-cell fixed-site radio transceiver, the serving-cell fixed-site transceiver defining a serving-cell and the at least one target-cell fixed-site radio transceiver defining a target-cell, said method comprising:
- determining a parameter associated with a SNR (signal-to-noise ratio) of selected control signals generated by the serving-cell fixed-site radio transceiver and the target-cell fixed-site radio transceiver;
- predicting a likelihood of successful effectuation of the control-channel-intensive event responsive to values of the parameter determined during said operation of determining;
- requesting that the selected control signals generated by at least the target-cell fixed-site radio transceiver be of increased diversity if the likelihood of successful effectuation of the control-channel-intensive event is predicted during said operation of predicting to be less than a minimum selected threshold;
- and
- permitting initiation of the effectuation of the control-channel-intensive event if the likelihood of successful effectuation of the event is predicted during said operation of predicting to be at least an acceptable selected threshold.
A mobility manager for selectively initiating effectuation of cell reselection for communications with a mobile station operable in a radio communication system having a serving-cell fixed-site radio transceiver and at least one target-cell fixed-site transceiver, the fixed-site radio transceiver defining a serving-cell and the at least one target-cell fixed-site radio transceiver defining at least one target-cell, said mobility manager comprising:
- a determiner coupled to receive indications of selected control signals generated by the serving-cell fixed-site radio transceiver and the target-cell fixed-site transceiver, said determiner for determining a parameter associated with a SNR (signal-to-noise ratio) of the selected control signals;
- a likelihood predictor coupled to receive the parameter determined by said determiner, said likelihood predictor for predicting a likelihood of successful effectuation of cell reselection responsive to values of the parameter;
- and
- a requestor coupled to receive indications of predictions made by said likelihood predictor, said requestor for requesting that the selected control signals generated by the target-cell fixed-site radio transceiver be of increased diversity if the likelihood of successful effectuation of the cell reselection predicted by said likelihood predictor is less than a selected threshold.
In a radio communication system having a serving-cell fixed-site radio transceiver and at least one target-cell fixed-site transceiver, the fixed-site radio transceiver defining a serving-cell and the at least one target-cell fixed-site transceiver defining at least one target-cell, an improvement of apparatus for selectively initiating effectuation of cell reselection for communications with a mobile station, said apparatus comprising:
- a determiner coupled to receive indications of selected control signals generated by the serving-cell fixed-site radio transceiver and the target-cell fixed-site transceiver, said determiner for determining a parameter associated with a SNR (signal-to-noise ratio) of the selected control signals;
- a likelihood predictor coupled to receive the parameter determined by said determiner, said likelihood predictor for predicting a likelihood of successful effectuation of cell reselection responsive to values of the parameter;
- and
- a requestor coupled to receive indications of predictions made by said likelihood predictor, said requestor for requesting that the selected control signals generated by the target-cell fixed-site radio transceiver be of increased diversity if the likelihood of successful effectuation of the cell reselection predicted by said likelihood predictor is less than a selected threshold.
Dependencies are inferred from the claim text.