Transmission control method for buffer status report, user equipment, and mobile communication system
AssigneeNtt Docomo, Inc.
InventorsTooru UCHINO, Hideaki TAKAHASHI
Life of this patent
Estimating the term…
Abstract
A transmission control method for buffer status reporting includes the steps of, by a network, configuring inter-site uplink carrier aggregation based upon at least one of a data size accumulated in a buffer of user equipment in communication with a first radio base station of a serving cell or a quality of a cell under a second radio base station, sending information of the configuration of the inter-site uplink carrier aggregation from the first radio base station to the user equipment, and transmitting a buffer status report from the user equipment to the second radio base station upon configuration of the inter-site uplink carrier aggregation.
Claims19
A transmission control method for buffer status report, comprising:
- by a network, configuring inter-site uplink carrier aggregation based upon at least one of a data size accumulated in a buffer of a user equipment communicating with a first radio base station of a serving cell or a quality of a cell under a second radio base station;
- sending information of the configuration of the inter-site uplink carrier aggregation from the first radio base station to the user equipment;
- and
- transmitting a buffer status report from the user equipment to the second radio base station upon the configuration of the inter-site uplink carrier aggregation.
A user equipment comprising:
- a receiver to receive a notice of configuration of inter-site uplink carrier aggregation from a first radio base station;
- a component carrier manager to trigger buffer status reporting based on the notice and configure a second radio base station that is different from the first radio base station as a secondary cell;
- a buffer status report creator to create a buffer status report indicating an uplink data size buffered in the user equipment;
- and
- a transmitter to transmit the created buffer status report to the second radio base station.
A mobile communication system comprising:
- a first radio base station;
- a user equipment in communication with the first radio base station under control of the first radio base station;
- and
- a second radio base station different from the first radio base station,
- wherein the first radio base station informs the user equipment of configuration of inter-site uplink carrier aggregation based upon at least one of a data size accumulated in a buffer of the user equipment or a quality of a cell under the second radio base station, and
- wherein the user equipment triggers buffer status reporting upon configuration of the inter-site uplink carrier aggregation, configures the second radio base station as a target of the inter-site uplink carrier aggregation, and transmits a buffer status report to the second radio base station.
Dependencies are inferred from the claim text.