[특허]Transmission power control method and a communication system using the same

Transmission power control method and a communication system using the same 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04J-013/00
출원번호	US-0439302 (1995-05-11)
우선권정보	JP-0098816 (1994-05-12); JP-0077937 (1995-04-03)
발명자 / 주소	Sawahashi Mamoru (Yokosuka JPX) Umeda Narumi (Yokohama JPX) Dohi Tomohiro (Yokohama JPX) Ohno Koji (Yokohama JPX)
출원인 / 주소	NTT Mobile Communications Network Inc. (Tokyo JPX 03)
인용정보	피인용 횟수 : 93 인용 특허 : 0

초록 ▼

A transmission power control method for a CDMA system including the steps of calculating an actual SIR (Signal-to-Interference Ratio) of a desired signal; deciding whether the actual SIR is greater than a predetermined reference SIR which satisfies a predetermined conununication quality; forming a transmission power control bit on the basis of a result of deciding; inserting the transmission power control bit periodically into a forward frame, which steps are performed at the base station, and steps of calculating tentative reverse transmission power in accordance with the transmission power control bit in the forward frame; deciding reverse transmission power such that the reverse transmission power is made equal to the tentative reverse transmission power when the tentative reverse transmission power is less than a predetermined maximum transmission power, but otherwise made equal to the predetermined maximum transmission power; and transmitting a signal from the mobile station to the base station at the reverse transmission power, which step

대표청구항 ▼

A transmission power control method for a CDMA (Code Division Multiple Access) system comprising the steps of: calculating, at a base station, a first actual SIR (Signal-to-Interference Ratio), said first actual SIR being defined as a ratio of received power of a desired signal sent from a mobile station with which the base station is communicating to a sum of interference power and thermal noise power from other stations; deciding, at the base station, whether said first actual SIR is greater than a first predetermined reference SIR which satisfies a predetermined communication quality; forming, at the base station, one or more first transmission power control bits on the basis of a result of said step of deciding; inserting, at the base station, said first transmission power control bits periodically into a forward (from base station to mobile station) frame; calculating, at said mobile station, tentative reverse (mobile station to base station) transmission power in accordance with said first transmission power control bits in said forward frame sent from said base station; deciding, at the mobile station, reverse transmission power, said reverse transmission power being made equal to said tentative reverse transmission power when said tentative reverse transmission power is equal to or less than first predetermined maximum transmission power, and being made equal to said first predetermined maximum transmission power when said tentative reverse transmission power is greater than said first predetermined maximum transmission power; and transmitting a signal from said mobile station to said base station at said reverse transmission power.

이 특허를 인용한 특허 (93)

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A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

Transmission power control method and a communication system using the same 원문보기

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Transmission power control method and a communication system using the same 원문보기

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