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US 9,438,392 B2Granted
Radio communication device, radio communication method, and radio communication system
AssigneeSony Corporation
InventorHiroaki Takano
Life of this patent
Estimating the term…
Abstract
In a radio communication, a UE terminal uses a CSI-RS as a reference signal for point selection only in the case of a scenario 4, and uses a CRS as a reference signal for point selection in the cases of scenarios 1 to 3 other than the scenario 4. Through RRC signaling, an eNodeB notifies the UE terminal of the fact that the measurement of a specific cell ID will be performed using a CSI-RS, that is, a cell ID using a CSI-RS as a reference signal for point selection. The operations suppress overhead of reference signals and improve a point selection update frequency.
Claims16
A radio communication device comprising:
- a subordinate base station information acquisition part configured to acquire information related to a number of terminals requiring a multi-point cooperative transmission and reception from base stations subordinate to the radio communication device;
- a transmission frequency control part configured to control a frequency of transmitting a reference signal by the base stations, for determining a cooperation group configured to perform the multi-point cooperative transmission and reception, based on the number of terminals requiring the multipoint cooperative transmission and reception;
- and
- a notification part configured to notify each base station of control information obtained by the transmission frequency control part.
1 more element
A radio communication device comprising:
- a reference signal measurement part configured to measure a reference signal transmitted from each base station to determine a cooperation group that performs multi-point cooperative transmission and reception for the radio communication device;
- and
- a measurement frequency control part configured to control a frequency of the measurement for each base station in the reference signal measurement part based on results of the measurement in the reference signal measurement part,
- wherein the frequency of measurement for a new base station that is not included in the cooperation group is increased in an event of a base station exhibiting a deterioration in communication quality is detected in the cooperation group.
1 more element
A radio communication device comprising:
- a base station information acquisition part configured to acquire arrangement information of base stations that can be included in a cooperation group configured to perform multipoint cooperative transmission and reception for the radio communication device;
- a measurement frequency control part configured to control a frequency of measuring a reference signal from a base station based on the acquired base station arrangement information, to determine the cooperation group,
- wherein the frequency of measuring the reference signal is increased in an area in which density of the base stations that can be included in the cooperation group is high;
- and
- a reference signal measurement part configured to measure the reference signal from the base station in accordance with the frequency controlled by the measurement frequency control part.
2 more elements
A radio communication device comprising:
- a carrier determination part configured to determine the importance of performing multi-point cooperative transmission and reception for each component carrier upon carrier aggregation;
- a transmission frequency control part configured to control a frequency of transmitting a reference signal for determining a cooperation group configured to perform multi-point cooperative transmission and reception in each component carrier based on results of the determination in the carrier determination part;
- and
- a notification part configured to notify each base station of control information obtained by the transmission frequency control part.
1 more element
A radio communication device comprising:
- a transmission frequency control part configured to control a frequency of transmitting a reference signal for determining a cooperation group configured to perform multi-point cooperative transmission and reception in each component carrier in accordance with frequency upon carrier aggregation;
- and
- a notification part that is configured to notify each base station of control information obtained by the transmission frequency control part.
A radio communication device comprising:
- a transmission frequency control part configured to control a frequency of transmitting a reference signal by base stations, for determining a cooperation group configured to perform multi-point cooperative transmission and reception in each component carrier, in accordance with arrangement in terms of frequency upon carrier aggregation;
- and
- a notification part that configured to notify each base station of control information obtained by the transmission frequency control part.
Dependencies are inferred from the claim text.