초록 ▼

When a base station and a plurality of terminal stations communicate with each other by radio, reception situations of signals transmitted from a base station are measured by respective terminal stations and measured information is transmitted to the base station. When the base station adaptively s

When a base station and a plurality of terminal stations communicate with each other by radio, reception situations of signals transmitted from a base station are measured by respective terminal stations and measured information is transmitted to the base station. When the base station adaptively sets processing of signals transmitted to the respective terminal stations based on the transmitted information and multiplexes and transmits, from the base station to a plurality of terminal stations, power control information (RPC) for instructing electric power of signals transmitted from the respective terminal stations to the base station, transmission energy to individual terminal stations are set adaptively and transmission electric power at the respective terminal stations are set based on the power control information. Thus, information such as power control information that should individually instructed to the respective terminal stations can satisfactorily be transmitted to all terminal stations by a simple arrangement and simple processing.

대표청구항 ▼

What is claimed is: 1. A communication system, comprising: a base station having: data processing means for individually and adaptively setting processing of data transmitted to each of a plurality of terminal stations based on communication states of each of said plurality of terminal stations; po

What is claimed is: 1. A communication system, comprising: a base station having: data processing means for individually and adaptively setting processing of data transmitted to each of a plurality of terminal stations based on communication states of each of said plurality of terminal stations; power control information processing means for individually and adaptively setting and multiplexing a transmission energy of power control information for controlling a transmission electric power of all of said plurality of terminal stations based on communication states of said plurality of terminal stations; and transmission processing means for multiplexing and transmitting a signal processed by said data processing means and a signal processed by said power control information processing means; wherein each of said plurality of terminal stations have: measuring means for measuring a reception state of a received signal transmitted from said base station; and transmission processing means for transmitting, with a transmission electric power based on said power control information transmitted from said transmission processing means of said base station, information on said reception state measured by said measuring means, wherein said transmission electric power transmitted by said transmission processing means of said base station is a fixed value, and said power control information processing means adaptively sets a transmission energy for each of said plurality of terminal stations based on said information on said reception state such that a total electric power of said power control information transmitted by said base station is a constant value, and wherein transmission energy for each of said plurality of terminal stations are interdependent such that when the transmission energy for one of said plurality of terminal stations is changed, the transmission energy for the totality of the others of said plurality of terminal stations is changed as well such that the total electric power of said power control information transmitted by said base station is a constant value. 2. The communication system according to claim 1, wherein said power control information processing means of said base station spreads power control information for saidplurality of terminal stations by using individual codes for each of said plurality of terminal stations and multiplexes said spread power control information. 3. The communication system according to claim 1, wherein said power control information processing means of said base station increases said transmission energy of power control information for a terminal station that transmits information indicating that a measured value of said reception state is lower than a threshold value and decreases transmission energy of power control information for a terminal station that transmits information indicating that said measured value of said reception state is higher than said threshold value. 4. The communication system according to claim 1, wherein said power control information processing means of said base station adaptively sets said fransmission energy by controlling said transmission electric power. 5. The communication system according to claim 1, wherein said power control information processing means of said base station adaptively sets said transmission energy by adaptively changing time consumed for transmission. 6. A communication method in which a base station and a plurality of terminal stations communicate, the method comprising the steps of: generating power control information for all of said plurality of terminal stations for instructing electric power of a signal transmitted to said base station; adaptively setting transmission energy of said power control information for all of said plurality of terminal stations; multiplexing adaptively set power control information having transmission power set in said step of adaptively setting to generate multiplexed power control information; transmitting said multiplexed power control information from said base station to said plurality of terminal stations; and fixing a total transmission electric power of said multiplexed power control information at a constant value made up of said adaptively set power control information for said plurality of terminal stations, wherein transmission energy for each of said plurality of terminal stations are interdependent such that when the transmission energy for one of said plurality of terminal stations is changed, the transmission energy for the totality of the others of said plurality of terminal stations is changed as well such that the total electric power of said power control information transmitted by said base station is a constant value. 7. The communication method according to claim 6, wherein said power control information for said plurality of terminal stations are spread by using individual codes for said plurality of terminal stations. 8. The communication method according to claim 6, further comprising the steps of: increasing said transmission energy of power control information for a terminal station having a value of a reception state lower than a threshold value; and decreasing said transmission energy of power control information to a terminal station having a value of said reception state higher than said threshold value. 9. The communication method according to claim 6, wherein said transmission energy is adaptively set by controlling said transmission electric power. 10. The communication method according to claim 6, wherein said transmission energy is adaptively set by adaptively changing time intervals for transmission. 11. A communication apparatus at a base station for communicating with a plurality of terminal stations by radio, comprising: data processing means for individually and adaptively setting processing of data transmitted to each of said plurality of terminal stations based on communication states with said plurality of terminal stations; power control information processing means for individually and adaptively setting and multiplexing transmission power control information for controlling transmission electric power of each of said plurality of terminal stations based on said communication states with said plurality of terminal stations; and transmission processing means for multiplexing and transmitting a signal processed by said data processing means and a signal processed by said power control information processing means, wherein transmission electric power of said signal transmitted by said transmission processing means adaptively sets a transmission energy for each of said plurality of terminal stations based on said communication states and a total electric power of said power control information is set to a constant value, and wherein transmission energy for each of said plurality of terminal stations are interdependent such that when the transmission energy for one of said plurality of terminal stations is changed, the transmission energy for the totality of the others of said plurality of terminal stations is changed as well such that the total electric power of said power control information transmitted by said base station is a constant value. 12. The communication apparatus according to claim 11, wherein said power control information processing means spreads power control information, for said each of said plurality of terminal stations by using individual codes for said each of said plurality of terminal stations and multiplexes said spread power control information. 13. The communication apparatus according to claim 11, wherein said power control information processing means increases said transmission energy of power control information for a terminal station having said communication state lower than a threshold value and decreases said transmission energy of power control information for a terminal station having said communication state higher than said threshold value. 14. The communication apparatus according to claim 11, wherein said power control information processing means adaptively sets said transmission energy by controlling said transmission electric power. 15. The communication apparatus according to claim 11, wherein said power control information processing means adaptively sets transmission energy by adaptively changing time intervals for transmission.