Radio station, radio terminal, and method for controling transmission timing in radio communication system
AssigneeNEC Corporation
InventorHisashi Futaki
Life of this patent
Estimating the term…
Abstract
A radio station, a radio terminal, and a method for transmission timing control in a radio communications system are provided that facilitate uplink-signal synchronization management in a plurality of cell groups. The radio station (10) calculates uplink-signal transmission timing adjustment values TA1 and TA2 for respective cell groups (1, 2), each of which includes at least one cell including an available uplink radio resource, and notifies the calculated uplink-signal transmission timing adjustment values TA1 and TA2 to the radio terminal (20) at a time.
Claims39
A radio station having a function of communicating with a radio terminal by using a plurality of radio resources that correspond respectively to a plurality of cells, comprising:
- a calculation section that calculates an uplink-signal transmission timing adjustment value for each of cell groups, wherein each cell group includes at least one cell including an available uplink radio resource;
- and
- a control section that notifies uplink-signal transmission timing adjustment values calculated for the cell groups to the radio terminal at a time.
A method for transmission timing control at a radio station having a function of communicating with a radio terminal by using a plurality of radio resources that correspond respectively to a plurality of cells, comprising:
- calculating an uplink-signal transmission timing adjustment value for each of cell groups, wherein each cell group includes at least one cell including an available uplink radio resource;
- and
- notifying uplink-signal transmission timing adjustment values calculated for the cell groups to the radio terminal at a time.
A radio terminal having a function of communicating with a radio station by using a plurality of radio resources that correspond respectively to a plurality of cells, comprising:
- a reception section that receives respective uplink-signal transmission timing adjustment values for cell groups from the radio station at a time, wherein each cell group includes at least one cell including an available uplink radio resource.
A method for transmission timing control at a radio terminal having a function of communicating with a radio station by using a plurality of radio resources that correspond respectively to a plurality of cells, comprising:
- receiving respective uplink-signal transmission timing adjustment values for cell groups from the radio station at a time, wherein each cell group includes at least one cell including an available uplink radio resource.
A radio communications system in which a radio station and a radio terminal can communicate with each other by using a plurality of radio resources that correspond to a plurality of cells, wherein
- the radio station comprises:
- a calculation section that calculates an uplink-signal transmission timing adjustment value for each of cell groups, wherein each cell group includes at least one cell including an available uplink radio resource;
- and
- a notification section that notifies uplink-signal transmission timing adjustment values calculated for the cell groups to the radio terminal at a time, and
- the radio terminal comprises a reception section that receives the uplink-signal transmission timing adjustment values from the radio station.
Dependencies are inferred from the claim text.