Radio base station, user terminal, radio communication system and interference estimation method
AssigneeNtt Docomo, Inc.
InventorsSatoshi Nagata, Yoshihisa Kishiyama
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Abstract
A radio base station is disclosed that receives an uplink signal using a time division duplexing (TDD) scheme, including an estimation section that estimates an interference level that the uplink signal receives in a plurality of subframes of which a downlink/uplink configuration differs among cells and a transmission section that transmits information about the interference level. The information about the interference level comprises interference levels about the plurality of subframes.
Claims15
A radio base station that receives an uplink signal using a time division duplexing (TDD) scheme, comprising:
- a processor that estimates an interference level that the uplink signal receives for each of a plurality of subframes of which a downlink/uplink configuration differs among a cell associated with the base station and a neighboring cell associated with another base station;
- and
- a transmitter that transmits the interference level for each uplink subframe of the plurality of subframes,
- wherein the processor estimates the interference level based on received radio resource information specified in subframes associated with subframe index-numbers predetermined by the another base station.
A radio communication system comprising:
- a user terminal;
- and a radio base station that receives an uplink signal from the user terminal using a time division duplexing (TDD) scheme, the radio base station comprising:
- a processor that estimates an interference level that the uplink signal receives for each of a plurality of subframes of which a downlink/uplink configuration differs among a cell associated with the base station and a neighboring cell associated with another base station;
- and
- a transmitter that transmits the interference level for each uplink subframe of the plurality of subframes,
- wherein the processor estimates the interference level based on received radio resource information specified in subframes associated with subframe index-numbers predetermined by the another base station.
A radio communication method in a radio communication system having a user terminal and a radio base station that receives an uplink signal from the user terminal using a time division duplexing (TDD) scheme, the radio communication method comprising the steps of:
- estimating, by the radio base station, an interference level that the uplink signal receives for each of a plurality of subframes of which a downlink/uplink configuration differs among a cell associated with the base station and a neighboring cell associated with another base station;
- and
- transmitting, by the radio base station, the interference level for each uplink subframe of the plurality of subframes,
- wherein estimating the interference level is based on received radio resource information specified in subframes associated with subframe index-numbers predetermined by the another base station.
Dependencies are inferred from the claim text.