Radio communication system
AssigneeFujitsu Limited
InventorTakayoshi Ode
Life of this patent
Estimating the term…
Abstract
A frame format is generated which can constrain the PAPR at a lower level without limitation in code selections in a radio communication system. The radio communication system with each radio channel constituted by a control channel and a data channel divides a plurality of the radio channels in a frequency direction for mapping to a radio frame format. A control signal position on the control channel is controlled in the radio frame format for each user or service to reduce peak transmission power or a peak-to-average power ratio of a radio communication apparatus.
Claims17
A radio communication system with each radio channel constituted by a control channel and a data channel, the radio communication system dividing a plurality of the radio channels in a frequency direction for mapping to a radio frame format,
- wherein a control signal position on the control channel is controlled in the radio frame format for each user or service to reduce peak transmission power or a peak-to-average transmission power ratio of a radio communication apparatus.
A radio communication apparatus in a radio communication system with each radio channel constituted by a control channel and a data channel, the radio communication system dividing a plurality of the radio channels in a frequency direction for mapping to a radio frame format, the radio communication apparatus comprising:
- a transmission power calculating unit that measures peak transmission power or a peak-to-average power ratio (PAPR);
- and
- a frame format controlling unit that controls the utilized radio frame format based on the calculation result of the transmission power calculating unit.
A radio communication apparatus in a radio communication system with each radio channel constituted by a control channel and a data channel, the radio communication system dividing a plurality of the radio channels in a frequency direction for mapping to a radio frame format, the radio communication apparatus comprising:
- a transmission power calculating unit that measures peak transmission power or a peak-to-average power ratio (PAPR) of the entire apparatus;
- an individual transmission power calculating unit that measures peak transmission power for each user or service;
- and
- a frame format controlling unit that controls the utilized radio frame format based on the calculation results of the transmission power calculating unit and the individual transmission power calculating unit.
A radio communication apparatus in a radio communication system with each radio channel constituted by a control channel and a data channel, the radio communication system dividing a plurality of the radio channels in a frequency direction for mapping to a radio frame format, the radio communication apparatus comprising:
- a base band transmission power calculating unit that measures transmission signal power of a base band to calculate transmission power based on the measurement result;
- and
- a frame format controlling unit that controls the utilized radio frame format based on the calculation result of the transmission power calculating unit.
A connection setting method in a radio communication system with each radio channel constituted by a control channel and a data channel, the radio communication system dividing a plurality of the radio channels in a frequency direction for mapping to a radio frame format, the method comprising the steps of:
- sending a connection setting request from a radio network controller to a base transceiver station;
- based on the connection setting request, in the base transceiver station, selecting an unutilized radio frame format from a plurality of the radio frame formats with control signal positions on the control channel controlled for each user or service, and notifying a corresponding terminal of the selected radio frame format;
- and
- from the corresponding terminal, notifying the base transceiver station of the completion of the setting to start data transmission/reception with the use of the notified radio frame format.
Dependencies are inferred from the claim text.