[특허]Wireless indoor data relay system

[미국특허] Wireless indoor data relay system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04B-007/00
출원번호	US-0708433 (1991-05-31)
발명자 / 주소	Knapp Guenther (7 Briarwood Ave. Peabody MA 01960)
인용정보	피인용 횟수 : 81 인용 특허 : 0

초록 ▼

This invention removes the requirement of cable interconnections to local area network (LAN) nodes with wireless optical relay stations suitable for high data rates. Relay sections are equipped with IR transmitters, receivers and narrow beam optics. Manual beam alignment during the LAN installation is aided by a visible light beam of equal beam width and direction. Rotational freedom of the optical antenna systems provide precise aiming. Structure couplers extend, by low-power RF coupling through nonmetallic wall and ceilings, the wireless data transmission from a single room to rooms and building floors. Shielding and wall gaskets of the structure couplers eliminate RF radiation penetration and leakage, and therefore prevent eavesdropping and jamming.

대표청구항 ▼

A portable indoor wireless optical communication relay system to relay local area network (LAN) inbound and outbound data of at least 1 Mbps from optical relay stations to optical relay stations by means of narrow light beams serving a plurality of infrared (IR) transponders by a plurality of relay station, each relay station comprising: at least two optical receiver systems for receiving modulated light signals, wherein one said receiver system is receiving said signals representative of the inbound data, and wherein one said receiver system is receiving said signals representative of the outbound data; each said optical receiver system comprising: a light collecting means with tubular incidental light beam shielding means for protection of photo detecting means from direct and indirect, light rays of room illuminating sources and for protection from interfering data modulated light beams, a photo detecting means responsive to the light signals received from said light collecting means, and receiving means for data recovery and reconditioning of said modulated light signals; at least two optical transmitter systems for transmitting said light modulated signals, wherein one said transmitter system is transmitting signals representative of the received and reconditioned inbound data, and wherein one said transmitter system is transmitting signals representative of the received and reconditioned outbound data; each said optical transmitter system comprising: light beam emitting means with narrow beam width to illuminate the receiver light collecting aperture of the recipient relay station, transmitting means for driving said light beam emitter with amplified signals representative of the inbound or outbound signals; an interface means for connection of received inbound to transmitted inbound data and received outbound to transmitted outbound data signal lines of two equally constructed optical relay sections forming an optical relay station, each said relay section comprising at least one said optical receiver system and at least one optical transmitter system.

이 특허를 인용한 특허 (81) 인용/피인용 타임라인 분석

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[미국특허] Wireless indoor data relay system 원문보기

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