Method of synchronization of a base station network
First Claim
Patent Images
1. A telecommunications system comprising:
- a first transmitter unit for transmitting first signals to at least one station;
a second transmitter unit for transmitting second signals to at least one station;
a first receiving unit associated with the first transmitter unit for receiving the second signals;
a second receiving unit associated with the second transmitter for receiving said first signals; and
a synchronization unit coupled to both the first and second receiving units;
said synchronization unit being arranged to compare the timing of the first signals with the timing of the second signals as received by the respective receiving units and to generate a control signal to at least one of the first and second transmitters to increase the synchronization of the first and second signals.
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Accused Products
Abstract
A telecommunications system has a first transmitter unit for transmitting first signals to at least one station; a second transmitter unit for transmitting second signals to at least one station; a receiving unit associated with the first transmitter unit for receiving the second signals; and a synchronization unit coupled to the receiving unit for generating a control signal to at least one of the first and second transmitters to increase the synchronization of the first and second signals.
141 Citations
36 Claims
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1. A telecommunications system comprising:
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a first transmitter unit for transmitting first signals to at least one station;
a second transmitter unit for transmitting second signals to at least one station;
a first receiving unit associated with the first transmitter unit for receiving the second signals;
a second receiving unit associated with the second transmitter for receiving said first signals; and
a synchronization unit coupled to both the first and second receiving units;
said synchronization unit being arranged to compare the timing of the first signals with the timing of the second signals as received by the respective receiving units and to generate a control signal to at least one of the first and second transmitters to increase the synchronization of the first and second signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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17. A telecommunications system as claimed in clam 16, wherein the frequency of the first and said second transmitter units changes between time slots.
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29. A method for synchronizing a telecommunications system comprising:
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transmitting first signals to at least one mobile station from a first transmitter unit;
transmitting second signals to at least one mobile station from a second transmitter unit;
receiving the second signals at said first transmitter unit;
receiving the first signals at said second transmitter unit; and
comparing at a synchronization unit coupled to both the first and second receiving units, the timing of the first signals with the timing of the second signals as received at the first and second transmitter units and generating a control signal to at least one of the first and second transmitter units to increase the synchronization of the first and second signals.
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30. A telecommunications system comprising:
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a first transmitter unit for transmitting first signals to at least one station where said at least one station is in a first area covered by said first transmitter unit;
a second transmitter unit for transmitting second signals to at least one station when said at least one station is in a second area covered by said second transmitter unit; and
a timing difference determining unit for determining the difference in timing of said first and second transmitter units and for providing information on said difference to at least one station, said information being used by said station when said station moves between said first and second areas, said timing difference unit being separate from said first and second transmitter units.
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31. A station for use in a telecommunications network comprising:
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a first transmitter unit for transmitting first signals to at least one terminal; and
a receiving unit for receiving second signals from a second transmitter unit which is arranged to transmit second signals to at least one terminal, said receiving unit arranged to determine a difference in the timing between said first and second transmitter units, wherein the station is arranged to send the difference in the timing to a separate timing control unit and to receive from the separate timing control unit a control signal for reducing the difference in timing between said first and second transmitter units.
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32. A telecommunications system comprising:
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a first transmitter unit for transmitting first signals to at least one station;
a second transmitter unit for transmitting second signals to at least one station;
a receiving unit for comparing the time of said first and second signals; and
a synchronization unit coupled to the receiving unit for generating a control signal to at least one of the first and second transmitters to increase the synchronization of the first and second signals, said synchronization unit being separate from said receiver unit.
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33. A telecommunications system comprising:
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a first transmitter unit for transmitting first signals to at least one station;
a second transmitter unit for transmitting second signals to at least one station;
a first receiving unit associated with the first transmitter unit for receiving the second signals;
a second receiving unit associated with the second transmitter unit for receiving said first signals;
a third transmitter unit;
a third receiving unit associated with the third transmitter unit; and
a synchronization unit coupled to the first, second and third receiving units for generating a control signal to at least one of the first, second and third transmitters to increase the synchronization of the first and second signals, wherein each of the first, second and third receiving units determines a difference of the timing signals between the transmitter unit with which the receiving unit is associated and each of the other two transmitter units, and wherein said synchronization unit is arranged to determine a minimum timing difference between two transmitter units based on a comparison of the timing difference observed by the receiver unit associated with one of the two transmitter units between said transmitter units and the sum of;
(i) the difference observed by the receiver unit associated with said one transmitter unit between said one transmitter unit and the third transmitter unit; and
(ii) the difference observed by the receiver unit associated with the third transmitter unit between the third transmitter unit and the other of the two transmitter units.
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34. A telecommunication system comprising:
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a multiplicity of transmitter units divided into a plurality of groups, each group comprising a plurality of transmitter units which are substantially synchronized with one another and the plurality of groups are not synchronized with respect to each other, wherein at least one group comprises;
a first transmitter unit for transmitting first signals to at least one station;
a second transmitter unit for transmitting second signals to at least one station;
a receiving unit associated with the first transmitter unit for receiving the second signals;
a synchronization unit coupled to the receiving unit for generating a control signal to at least one of the first and second transmitters to increase the synchronization of the first and second signals. - View Dependent Claims (35, 36)
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Specification