[특허]Method and system for CDMA mobile communication

Method and system for CDMA mobile communication 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04B-007/216
출원번호	US-0530186 (1995-10-05)
우선권정보	JP-0015133 (1994-02-09); JP-0095086 (1994-05-09); JP-0110833 (1994-05-25)
국제출원번호	PCT/JP95/00181 (1995-02-09)
§371/§102 date	19951005 (19951005)
국제공개번호	WO-9522213 (1995-08-17)
발명자 / 주소	Umeda Narumi (Yokohamashi JPX) Higashi Akihiro (Yokosukashi JPX) Hiroike Akira (Yokosukashi JPX) Kaiyama Akira (Yokohamashi JPX)
출원인 / 주소	NTT Mobile Communications Network Inc. (Tokyo JPX 03)
인용정보	피인용 횟수 : 98 인용 특허 : 0

초록 ▼

CDMA mobile communication method and system for realizing an autonomous distributed control of radio channel allocation, a synchronization control for a smooth establishment/switching, and a VOX control for a capacity increase are provided. At either one station of each base station and the mobile station, one of a plurality of prescribed short spread codes is selected, and a data sequence to be transmitted is spread by using the selected short spread code and a prescribed long spread code and then transmitted, while at another one station, the data sequence before spreading is reproduced and received by despreading the data sequence from that either one station by using the selected short spread code and the prescribed long spread code. At a time of the handover, each one of data to be communicated between a handover source base station and the mobile station and data to be communicated between a handover target base station and the mobile station is spread by using both a long spread code and a short spread code, and the received data are composed by adjusting timings at each of the mobile station and the base station. Also, a VOX control is carried out for transmission frames to be transmitted through a radio channel in at least one of each base station and the mobile station, and transmitted by randomly allocating an offset with respect to a transmission timing for each channel from a plurality of prescribed offset amounts.

대표청구항 ▼

In a CDMA mobile communication system formed by a plurality of base stations and at least one mobile station which communicate in a CDMA scheme through radio channels, a CDMA mobile communication method comprising: a step of communicating by spreading each one of data to be communicated between a handover source base station and the mobile station and data to be communicated between a handover target base station and said mobile station by using both a long spread code and a short spread code; a step of carrying out a handover by composing data received from the handover source base station and data received from the handover target base station by adjusting timings at said mobile station; and a step of carrying out a handover by composing data received from the mobile station at a cell of handover source and data received from the mobile station at a cell of handover target by adjusting timings at each base station or an upper level device connected to that base station.

이 특허를 인용한 특허 (98)

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A62	인명구조; 소방(사다리 E06C)
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A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Method and system for CDMA mobile communication 원문보기

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Method and system for CDMA mobile communication 원문보기

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