IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0884315
(2010-09-17)
|
등록번호 |
US-RE43821
(2012-11-20)
|
우선권정보 |
JP-6-137621 (1994-06-20) |
발명자
/ 주소 |
- Serizawa, Mutsumu
- Nakajima, Nobuyasu
- Ogura, Koji
- Namekata, Minoru
- Wakutsu, Takashi
- Mukai, Manabu
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
56 |
초록
▼
A large amount of user information is transmitted with good efficiency by means of a high-speed downlink by making transmission rates of an uplink circuit and a downlink asymmetrical. The radio communication system includes a plurality of base stations, a plurality of terminals, an uplink establishe
A large amount of user information is transmitted with good efficiency by means of a high-speed downlink by making transmission rates of an uplink circuit and a downlink asymmetrical. The radio communication system includes a plurality of base stations, a plurality of terminals, an uplink established between each of the base stations and each of the terminals for the purpose of radio transmission of prescribed information from a terminal to a base station, and a downlink circuit established between each of the terminals and each of the base station for the purpose of radio transmission of prescribed data from a base station to a terminal. This radio communication system has a low-speed transmitting means, provided at the terminal, which transmits a radio signal at a relatively low transmission rate to an above-noted base station via the above-noted uplink, a low-speed receiving means, provided at the base station, which receives a radio signal sent at a relatively low transmission rate from the terminal via the uplink, a high-speed transmitting means, provided at the base station, which transmits a radio signal at a relatively high transmission rate to an above-noted terminal via the above-noted downlink, and a high-speed receiving means, provided at the terminal, which receives a radio sent at a relatively high transmission rate from the base station via the downlink.
대표청구항
▼
1. A radio communication system including at least one base station, and a plurality of terminals, said radio communication system comprising: an uplink which performs radio transmission of data at a first transmission rate;a low-speed down link which performs radio transmission of the data at a fir
1. A radio communication system including at least one base station, and a plurality of terminals, said radio communication system comprising: an uplink which performs radio transmission of data at a first transmission rate;a low-speed down link which performs radio transmission of the data at a first transmission rate;a high-speed downlink which performs radio transmission of the data at a second transmission rate which is higher than the first transmission rate;a first low-speed transmitter, provided at said terminal, which transmits a first radio signal at the first transmission rate to said base station via said uplink;a first low-speed receiver, provided at the base station, which receives the first radio signal, which sent at the first transmission rate, from said terminal via said uplink;a high-speed transmitter, provided at said base station, which transmits a second radio signal at the second transmission rate to said terminal via said high-speed downlink;a high-speed receiver, provided at said terminal, which receives the second radio signal at the second transmission rate from said base station via said high-speed downlink;a second low-speed transmitter, provided at said base station, which transmits a third radio signal at the first transmission rate to said terminal via said low-speed downlink; anda second low-speed receiver, provided at said terminal, which receives the third radio signal at the first transmission rate from said base station via said low-speed downlink;wherein said uplink and said low-speed downlink establish radio transmission at a first freguency, and said high-speed down link establishes radio transmission at a second frequency which is higher than said first frequency. 2. A method of performing a radio communication between a radio terminal and a base station, comprising: performing a first radio communication between a radio terminal transmission (RTT) means of said radio terminal and a base station reception (BSR) means of said base station, with the first radio communication having a first transmission rate and using a radio wave of a first frequency band; andperforming a second radio communication between a base station transmission (BST) means of said base station and a radio terminal reception (RTR) means of said radio terminal, with the second radio communication having a second transmission rate higher than the first transmission rate of the first radio communication and using a radio wave of a second frequency band which is higher than the first frequency band,whereina) the first radio communication and the second radio communication perform communications by Frequency Division Duplex (FDD) in which uplink and downlink transmissions use separated radio frequencies,b) spread signals are transmitted via the first radio communication and the second radio communication,c) in the first radio communication which corresponds to an uplink, control information to control the second radio communication which corresponds to a downlink is transmitted from the RTT means to the BSR means,d) in the second radio communication which corresponds to a downlink, various user data for a user are transmitted from the BST means to the RTR means, ande) the first radio communication corresponding to the uplink is used for a transmission of re-transmitted control information to control a re-transmission of the user data via the second radio communication corresponding to the downlink. 3. A method of performing a radio communication according to claim 2, wherein the first radio communication is performed by a random access mode. 4. A method of performing a radio communication according to claim 2, further comprising: transmitting a signal in frame in the first radio communication.
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