Radio base station, radio communication system and radio communication method
First Claim
1. A radio base station connected to a neighbor radio base station via inter-radio base station interface, the radio base station comprising:
- a processor and a memory, wherein the processor;
performs radio communication with a user terminal using a UL/DL configuration indicating a configuration of uplink and downlink subframes in a radio frame;
measures and detects interference that the radio base station suffers from; and
uses a result of a detection of the interference as a basis to determine which of two schemes is applied to at least one frequency domain resource allocation in each subframe,wherein one of the scheme has a restriction that an uplink subframe and a downlink subframe do not overlap each other in a same frequency domain resource, and the other scheme does not have the restriction, andwherein, if the measured interference is stronger than a threshold value, the processor determines to apply the restriction to each flexible subframe in the UL/DL configuration.
1 Assignment
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Accused Products
Abstract
In order to avoid interference efficiently and control the amount of radio resources that are not used for interference avoidance, the present invention provides a radio base station connected to a neighbor radio base station via inter-radio base station interface. The radio base station has: a radio communication section that performs radio communication with a user terminal using a UL/DL configuration indicating a configuration of uplink and downlink subframes in a radio frame; an interference detecting section that measures and detects interference that the radio base station suffers from; and a selecting section that uses an interference detection result as a basis to determine which to apply to each subframe, between a resource allocation-unrestricted scheme and an inter-cell uplink/downlink orthogonalization scheme.
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Citations
9 Claims
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1. A radio base station connected to a neighbor radio base station via inter-radio base station interface, the radio base station comprising:
a processor and a memory, wherein the processor; performs radio communication with a user terminal using a UL/DL configuration indicating a configuration of uplink and downlink subframes in a radio frame; measures and detects interference that the radio base station suffers from; and uses a result of a detection of the interference as a basis to determine which of two schemes is applied to at least one frequency domain resource allocation in each subframe, wherein one of the scheme has a restriction that an uplink subframe and a downlink subframe do not overlap each other in a same frequency domain resource, and the other scheme does not have the restriction, and wherein, if the measured interference is stronger than a threshold value, the processor determines to apply the restriction to each flexible subframe in the UL/DL configuration. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A radio communication system in which a radio base station is connected to a neighbor radio base station via inter-radio base station interface, the radio communication system comprising:
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the radio base station comprising a first processor and a first memory, wherein the first processor; performs radio communication with a user terminal using a UL/DL configuration indicating a configuration of uplink and downlink subframes in a radio frame; measures and detects interference that the radio base station suffers from; uses a result of a detection of the interference as a basis to determine which of two schemes is applied to at least one frequency domain resource allocation in each subframe, wherein one of the schemes has a restriction that an uplink subframe and a downlink subframe do not overlap each other in a same frequency domain resource, and the other scheme does not have the restriction; and transmits information indicating whether or not to apply the restriction to each subframe to the neighbor radio base station via the inter-radio base station interface; and the neighbor radio base station comprising a second processor and a second memory, wherein the second processor; receives the information from the radio base station; and uses the information as a basis to perform interference control by applying or not applying the restriction to each subframe, wherein, if the measured interference is stronger than a threshold value, the processor determines to apply the restriction to each flexible subframe in the UL/DL configuration.
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9. A radio communication method for a radio base station that is connected to a neighbor radio base station via inter-radio base station interface, the radio communication method comprising:
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performing radio communication with a user terminal using a UL/DL configuration indicating a configuration of uplink and downlink subframes in a radio frame; measuring and detecting interference that the radio base station suffers from; and using a result of the measuring and the detecting as a basis to determine which of two schemes is applied to at least one frequency domain resource allocation in each subframe, wherein one of the schemes has a restriction that an uplink subframe and a downlink subframe do not overlap each other in a same frequency domain resource, and the other scheme does not have the restriction, wherein, if the measured interference is stronger than a threshold value, the radio base station determines to apply the restriction to each flexible subframe in the UL/DL configuration.
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Specification