Arrangement in mobile telecommunications systems for providing synchronization of transmitters of base stations
First Claim
1. In a mobile telecommunication system including a number of base stations having transmitters and means for coordinating the base stations, an arrangement for providing for time coordination of a number of transmitters of the base stations, comprising in each base station:
- a transmitting element which is arranged to operate with a respective real-time clock;
a time-comparing element;
means for receiving a first common time information transmitted from the coordinating means to the base stations, and for supplying the first common time information on to the time-comparing element together with a second time information set up from the real-time clock, the first common time information being stable over a long time period and the second time information being stable of short time period;
wherein the time-comparing element places the first common time information in relation to the second time information;
the time-comparing element adjusts the real-time clock according to at least one predetermined criterion and a relation between the first common time information and the second time information for synchronizing the respective base station with at least one other base station; and
the time-comparing element, the receiving means, and the real-time clock form a closed phase-locking system in which the receiving means processes the first common time information that is received into a format comprehensible to the time-comparing element, whereby the second time information is made stable over the long time period.
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Accused Products
Abstract
An arrangement in a mobile telecommunication system which has two or more base stations having transmitting elements which are each arranged to operate with a respective real-time clock and a time-comparing element. A central coordinating unit in the system is arranged to transmit a first time signal to an element arranged in the base station for receiving the first time signal. The first time information is then transferred together with a second time information to the time-comparing element. The second time information is set up by the real-time clock in the transmitting element. The first time information and second time information are placed in relation to one another and, in dependence on the relationship between these and existing criteria, for example delays and the like, the time-comparing element adjusts the real-time clock so that synchronization is carried out.
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Citations
8 Claims
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1. In a mobile telecommunication system including a number of base stations having transmitters and means for coordinating the base stations, an arrangement for providing for time coordination of a number of transmitters of the base stations, comprising in each base station:
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a transmitting element which is arranged to operate with a respective real-time clock; a time-comparing element; means for receiving a first common time information transmitted from the coordinating means to the base stations, and for supplying the first common time information on to the time-comparing element together with a second time information set up from the real-time clock, the first common time information being stable over a long time period and the second time information being stable of short time period; wherein the time-comparing element places the first common time information in relation to the second time information;
the time-comparing element adjusts the real-time clock according to at least one predetermined criterion and a relation between the first common time information and the second time information for synchronizing the respective base station with at least one other base station; and
the time-comparing element, the receiving means, and the real-time clock form a closed phase-locking system in which the receiving means processes the first common time information that is received into a format comprehensible to the time-comparing element, whereby the second time information is made stable over the long time period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification