Method and system for multi-cell interference reduction in a wireless communication system
First Claim
1. A method for reducing multi-cell interference in a wireless communication system, the wireless communication system having a first base station whose communication signals with its covered terminals are interfered by communication signals transmitted between at least one interfering base station and its covered terminals, the method comprising;
- configuring, by the first base station, at least one inactive time slot in a transmit frame during which communications with its covered terminals are detectably reduced while communications between the at least one interfering base station and its covered terminals are maintained as normal; and
detecting characteristics of interfering signals generated by the communications between the at least one interfering base station and its terminals during the inactive time slot;
canceling the interfering signals by increasing a signal to interference and noise ratio of communication signals transmitted between the first base station and its terminals during the remaining portion of the transit frame based on the detected characteristics of the interfering signals.
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Accused Products
Abstract
A method and system for multi-cell interference reduction in a wireless communication system is disclosed. The present disclosure describes a new method and system for accurately detecting the characteristics of the interfering signals from relevant sources such as neighboring co-channel cells and other persistent interference sources. In order to better estimate the interfering signals, a base station designates a small inactive window in the transmit frame for a cell during which the communications between the base station and its terminals are reduced while every other communication pursues. As such, the interfering signals can be well exposed and the characteristics can be accurately detected. Based on the detected characteristics of the interfering signals, the base station can specifically design beam forming mechanism or other means to cancel or minimize the impact of such interference during regular communications.
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Citations
41 Claims
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1. A method for reducing multi-cell interference in a wireless communication system, the wireless communication system having a first base station whose communication signals with its covered terminals are interfered by communication signals transmitted between at least one interfering base station and its covered terminals, the method comprising;
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configuring, by the first base station, at least one inactive time slot in a transmit frame during which communications with its covered terminals are detectably reduced while communications between the at least one interfering base station and its covered terminals are maintained as normal; and detecting characteristics of interfering signals generated by the communications between the at least one interfering base station and its terminals during the inactive time slot; canceling the interfering signals by increasing a signal to interference and noise ratio of communication signals transmitted between the first base station and its terminals during the remaining portion of the transit frame based on the detected characteristics of the interfering signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A system for reducing multi-cell interference in wireless communications, wherein a first base station whose communication signals with its covered terminals are interfered by communication signals transmitted between at least one interfering base station and its covered terminals, the system comprising:
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means for configuring at least one inactive time slot in a transmit frame during which communications between the first base station and its covered terminals are detectably reduced while communications between the interfering base station and its covered terminals are maintained at predetermined levels; and means for detecting characteristics of interfering signals generated by the communications between the at least one interfering base station and its terminals during the inactive time slot; means for canceling the interfering signals by increasing a signal to interference and noise ratio of communication signals transmitted between the first base station and its terminals during the remaining portion of the transmit frame based on the detected characteristics of the interfering signals. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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Specification