Slots assignment method for control channel signal in mobile telecommunication system and base station employing the slots assignment method
First Claim
1. A slot assignment method for a control channel signal in a mobile telecommunication system which includes a plurality of base stations each having at least one mobile station wherein communications between the base station and the associated mobile stations are carried out in accordance with a multiple frame sequence of a plurality of frames each including a block of down-link signal slots and a block of up-link signal slots and communication of control channel information between each base station and the associated mobile station is carried out based on a control-channel signal carrier of a same frequency as the other base stations, said method comprising the steps of:
- monitoring, in each of the base stations, a reception status of the control-channel signal carrier of said specific frequency during a plurality of multiple frame periods;
judging a time slot including said control-channel signal carrier periodically detected at intervals of the multiple frame period as a down-link control-channel slot being used by the other base station; and
assigning one of the slots other than said down-link control-channel slot used by the other base stations as a down-link control-channel slot to be used in its own base station in the multiple frame of its own base station, said assigning step includes the steps of;
assigning, as the down-link control-channel slot to be used in its own base station, one of the remaining slots other than the slots belonging to a block of up-link signal slots of the multiple frame of its own base stations; and
selecting, as the down-link control-channel slot to be used in its own base station, one of the remaining slots located with respect to time farthermost from said down-link control-channel slot being used by the other base stations.
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Accused Products
Abstract
A slots assignment method for a control channel signal in a mobile telecommunication system employing a time division multiple access/time division duplex (TDMA-TDD) system having a plurality of base stations each having at least one mobile station. Each of the base stations detects a control-channel signal transmitted from other base stations and a control-channel signal transmitted from the mobile station throughout a plurality of multiple frame periods, discriminates down-link control-channel slots from up-link control-channel slots being used by other base stations, selects, as optimum down-link control-channel slot candidates, ones of idle slots of idle slot blocks other than the down and up-link control-channel slots being used by other base stations with use of a predetermined evaluation function, and assigns one of the selected idle slots as a down-link control-channel slot of its own base station.
80 Citations
8 Claims
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1. A slot assignment method for a control channel signal in a mobile telecommunication system which includes a plurality of base stations each having at least one mobile station wherein communications between the base station and the associated mobile stations are carried out in accordance with a multiple frame sequence of a plurality of frames each including a block of down-link signal slots and a block of up-link signal slots and communication of control channel information between each base station and the associated mobile station is carried out based on a control-channel signal carrier of a same frequency as the other base stations, said method comprising the steps of:
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monitoring, in each of the base stations, a reception status of the control-channel signal carrier of said specific frequency during a plurality of multiple frame periods; judging a time slot including said control-channel signal carrier periodically detected at intervals of the multiple frame period as a down-link control-channel slot being used by the other base station; and assigning one of the slots other than said down-link control-channel slot used by the other base stations as a down-link control-channel slot to be used in its own base station in the multiple frame of its own base station, said assigning step includes the steps of; assigning, as the down-link control-channel slot to be used in its own base station, one of the remaining slots other than the slots belonging to a block of up-link signal slots of the multiple frame of its own base stations; and selecting, as the down-link control-channel slot to be used in its own base station, one of the remaining slots located with respect to time farthermost from said down-link control-channel slot being used by the other base stations. - View Dependent Claims (2, 3, 4)
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5. In a mobile telecommunications systems which includes a plurality of base stations each having at least one mobile station and in which communication between the base station and the associated mobile stations is carried out in accordance with a multiple frame sequence of a plurality of frames each including a block of down-link signal slots and a block of up-link signal slots and communication of control channel information between each base station and the mobile station under jurisdiction thereof is carried out based on a control-channel signal carrier of a same specific frequency as the other base stations, each of said base stations comprising;
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means for monitoring, in each of the base stations, a reception status of the control-channel signal carrier of said specific frequency during a plurality of multiple frame periods; means for judging a time slot including said control-channel signal carrier periodically detected at intervals of the multiple frame period as a down-link control-channel slot being used by the other base station, and creating a table showing use statutes of the time slots of the multiple frames by other base stations; and means for assigning, by looking up said table, one of the slots other than said down-link control-channel slots being used by the other base stations as a down-link control-channel slot to be used in its own base station in the multiple frame of its own base station, said means for assigning said down-link control-channel slot includes; means for assigning, as the down-link control-channel slot to be used in its own base station, one of the remaining slots other than the slots belonging to a block of up-link signal slots of the multiple frame of its own base station; and means for selecting, as the down-link control-channel to be used in its own base station, one of the remaining slots located with respect to time, farthermost from said down-link control-channel slot being used by other the base stations. - View Dependent Claims (6, 7, 8)
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Specification