Radio communication system, radio communication method, radio base station and user terminal
First Claim
1. A user terminal in a radio communication system configured with a cell group including a plurality of cells, the user terminal comprising:
- a receiver that receives target cell information to measure a timing difference from a radio base station of a cell; and
a processor that measures, based on the target cell information, a timing difference between cells,wherein the user terminal determines a parameter,wherein, when the parameter is a first value, the user terminal reports the timing difference to the radio base station, andwherein, when the parameter is a second value, the user terminal does not report the timing difference to the radio base station.
0 Assignments
0 Petitions
Accused Products
Abstract
The present invention is designed to establish synchronization between transmission points when downlink signals are transmitted from a plurality of transmission points to a user terminal. A radio communication system has a first radio base station that forms a first cell, a second radio base station that forms a second cell, which is placed on the area of the first cell in an overlapping manner, and a user terminal that is capable of carrying out radio communication with the first radio base station and the second radio base station, and the second radio base station has a receiving section that receives synchronization correction information, which is for establishing synchronization with a synchronization target, from the user terminal, and a synchronization correction section that corrects synchronization based on the synchronization correction information.
6 Citations
8 Claims
-
1. A user terminal in a radio communication system configured with a cell group including a plurality of cells, the user terminal comprising:
-
a receiver that receives target cell information to measure a timing difference from a radio base station of a cell; and a processor that measures, based on the target cell information, a timing difference between cells, wherein the user terminal determines a parameter, wherein, when the parameter is a first value, the user terminal reports the timing difference to the radio base station, and wherein, when the parameter is a second value, the user terminal does not report the timing difference to the radio base station. - View Dependent Claims (2)
-
-
3. A radio base station in a radio communication system configured with a cell group including a plurality of cells, the radio base station comprising:
-
a transmitter that transmits target cell information to measure a timing difference to a user terminal; and a receiver that, when a parameter determined by the user terminal is a first value, receives information of the timing difference measured in the user terminal. - View Dependent Claims (4)
-
-
5. A radio communication system configured with a cell group including a plurality of cells, the radio communication system comprising:
-
a user terminal having; a first receiver that receives target cell information to measure a timing difference from a radio base station of a cell; and a processor that measures, based on the target cell information, a timing difference between cells, wherein the user terminal determines a parameter, wherein, when the parameter is a first value, the user terminal reports the timing difference to the radio base station, and wherein, when the parameter is a second value, the user terminal does not report the timing difference to the radio base station; and the radio base station having; a transmitter that transmits the target cell information; and a second receiver that, when the parameter determined by the user terminal is the first value, receives the information of the timing difference measured in the user terminal. - View Dependent Claims (6, 7, 8)
-
Specification