Method for reducing inter-cell interference in communications system
First Claim
1. A method for avoiding inter-cell interference in a cellular communications system, the method comprising steps oftransmitting first control signalling from a serving base station to a first user terminal, wherein the first user terminal is located within the coverage area of the serving base station and the coverage area of a second base station;
- in the serving base station, receiving, from the first user terminal, information on a timing difference between the first control signalling and second control signalling, the second control signalling being transmitted from the second base station to the first user terminal; and
on the basis of the received information, scheduling data transmission to the user terminal to be carried out non-simultaneously with the second control signalling.
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Accused Products
Abstract
The application discloses a method for avoiding inter-cell interference in a cellular communications system. In the method, a user terminal (UE2) measures (6-3) control signalling (6-2) of a first, serving base station (BS3) and control signalling (6-1) of a second base station (BS2), the user terminal (UE2) being within the coverage area of the serving base station (BS3) and the coverage area of the second base station (BS2). Based on the measuring, the user terminal calculates (6-4) a timing difference between the signalling from the serving base station (BS3) and the signalling from the second base station (BS2). Information on the timing difference is provided (6-5) to the serving base station (BS3). Based on the timing difference, the serving base station (BS3) schedules (6-6) data transmission (6-7) to be transmitted to the user terminal (UE2) non-simultaneously with the control signalling (6-1) from the second base station (BS2).
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Citations
27 Claims
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1. A method for avoiding inter-cell interference in a cellular communications system, the method comprising steps of
transmitting first control signalling from a serving base station to a first user terminal, wherein the first user terminal is located within the coverage area of the serving base station and the coverage area of a second base station; -
in the serving base station, receiving, from the first user terminal, information on a timing difference between the first control signalling and second control signalling, the second control signalling being transmitted from the second base station to the first user terminal; and on the basis of the received information, scheduling data transmission to the user terminal to be carried out non-simultaneously with the second control signalling. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for avoiding inter-cell interference in a cellular communications system, the method comprising steps of
receiving, in a first user terminal, first control signalling from a serving base station and second control signalling from a second base station, wherein the first user terminal is located within the coverage area of the serving base station and the coverage area of the second base station; -
on the basis of the received first and second control signalling, measuring at least one of a frame timing and a symbol timing for the serving base station and for the second base station; on the basis of said measuring, calculating a timing difference between the first and the second control signalling; providing, to the serving base station, information on said timing difference; receiving said information in the serving base station; and on the basis of the received information, scheduling data transmission from the serving base station to the first user terminal to be carried out non-simultaneously with control signalling from the second base station to the first user terminal. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A cellular communications system comprising a first user terminal located within the coverage area of a serving base station and the coverage area of a second base station, wherein the first user terminal is configured to receive first control signalling from the serving base station and second control signalling from the second base station, wherein the cellular communications system is configured to
measure, on the basis of the received first and second control signalling, at least one of a frame timing and a symbol timing, for the serving base station and for the second base station; -
calculate, on the basis of the measuring, a timing difference between the first and second control signalling; provide, to the serving base station, information on said timing difference; and schedule, on the basis of said information, data transmission from the serving base station to the first user terminal to be carried out non-simultaneously with control signalling from the second base station to the first user terminal. - View Dependent Claims (18, 19, 20, 21, 22)
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23. A base station in a cellular communications system, the base station being capable of serving a user terminal located within a coverage area of the base station and the coverage area of a second base station and arranged to transmit first control signalling to said user terminal, wherein the base station is configured to
receive, from the user terminal, information on a timing difference between the first control signalling and second control signalling, the second control signalling being transmitted from the second base station to the user terminal; - and
on the basis of the received information, schedule data transmission to the user terminal to be carried out non-simultaneously with the second control signalling. - View Dependent Claims (24)
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25. A user terminal in a cellular communications system, the user terminal being located within a coverage area of a serving base station and a coverage area of a second base station, wherein the user terminal is configured to receive first control signalling from the serving base station and second control signalling from the second base station, wherein the user terminal is further configured to
measure, on the basis of the received first and second control signalling, at least one of a frame timing and a symbol timing, for the serving base station and the second base station; -
calculate, on the basis of the measuring, a timing difference between the first control signalling and the second control signalling; and provide, to the serving base station, information on said timing difference. - View Dependent Claims (26, 27)
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Specification