[특허]Radio data communication system having means for reducing collisions between contending remote stations

Radio data communication system having means for reducing collisions between contending remote stations 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04J-003/16
출원번호	US-0867680 (1992-08-07)
우선권정보	GB-0024684 (1990-11-13)
국제출원번호	PCT/GB91/01998 (1991-11-13)
§371/§102 date	19920807 (19920807)
국제공개번호	WO-9209148
발명자 / 주소	Goodings Rupert Leslie A. (Cambridge GB3) Carter Leigh (Cambridge GB3) Mitchell Patrick (Cambridge GB3)
출원인 / 주소	Cognito Limited (West Yorkshire GBX 03)
인용정보	피인용 횟수 : 93 인용 특허 : 0

초록 ▼

A radio based communication system comprises a base station (1) and one or more remote stations (2) each incorporating a radio transmitter and receiver to support communication between the base station and each remote station on a down link and between each remote station and the base station on an up link. Each link comprises a plurality of frames of fixed length divided into a fixed number of slots. The base station includes a base control which transmits control data in a general control slot (GC) in each frame of the down link so as to identify to each remote station a down-setup slot (DSU) in each frame of the down link in which the base station (1) is to announce the transmission of data for it and identify at least one down-transfer slot (DTR) in the frame of the down link in which the data is to be transmitted. The control data further identifies an acknowledgement slot (ACK) in each frame of the down link and an up-setup slot (USU) divided into sub-slots (1/4) in each frame of the up link. Each remote station (2) includes a remote control which transmits a request to transmit data to the base station (1) in any sub-slot (1/4) of the up-setup slot (USU) and receives corresponding data in the acknowledgement slot (ACK) of the down link to identify an up-transfer slot (UTR) in the up link in which it is to transmit data to the base station.

대표청구항 ▼

A method of communicating data over a radio based communication system between a base station and one or more remote stations comprising the steps of transmitting data between the base station and each remote station in a down link comprising one or more down frames of fixed duration; transmitting data between each remote station and the base station in an up link comprising one or more up frames of fixed duration; dividing each down frame into a fixed number of down slots at least one of which is a general control slot, and at least one other is a down-setup slot; providing control data in said general control slot to identify for each remote station the down-setup slot in which the base station is to announce the transmission of data for each remote station; dividing each up frame into a fixed number of up slots at least one of which is an up-setup slot; providing control data in said general control slot to identify for each remote station said up-setup slot; dividing said up-setup slot into a number of sub-slots; each remote station wishing to transmit data to the base station transmitting a reservation request in one of said sub-slots; each remote station receiving said control data in said general control slot to identify said down-setup slot and said up-setup slot, and thereafter receiving data in said down-setup slot only, at least, until directed by the base station to again receive control data in said general control slot.

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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연합인증

Radio data communication system having means for reducing collisions between contending remote stations 원문보기

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연구과제 타임라인

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Radio data communication system having means for reducing collisions between contending remote stations 원문보기

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