[특허]Mobile communication system

[미국특허] Mobile communication system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04Q-007/00
출원번호	US-0772872 (1996-12-26)
우선권정보	JP-0001896 (1996-01-10)
발명자 / 주소	Nitadori Kazuhiko,JPX
출원인 / 주소	OKI Electric Industry Co., Ltd., JPX
대리인 / 주소	VenableFrank
인용정보	피인용 횟수 : 81 인용 특허 : 0

초록 ▼

A mobile communication system is provided which serves as an information infrastructure capable of providing intelligent information transmission and services. A mobile station on each vehicle traveling on a road includes first and second transceivers for carrying out radio communications with a third transceiver of a base station installed on a roadside. The first transceiver of a first mobile station is linked not only with the third transceiver of the base station through a first communication channel, but is also linked with the second transceiver of a second mobile station via a second communication channel. The first mobile station carries out information communications with the base station using the first communication channel, and at the same time with the second mobile station via the second communication channel. The first, second and third transceivers each have the function of measuring the incoming direction of the radio wave from the party, and calculating the distance to the party so that the location of each mobile station is identified in each station.

대표청구항 ▼

[ What is claimed is:] [1.] A mobile communication system for providing radio communication channels for information transmission between a mobile station mounted on a vehicle traveling on a road and a fixed communication network installed on a roadside,wherein said fixed communication network includes a base station comprising a first transmitting and receiving device for carrying out radio communications with said mobile station by transmitting and receiving a data packet,wherein said mobile station comprises a second transmitting and receiving device for carrying out radio communications with said first transmitting and receiving device by transmitting and receiving a data packet,wherein each of said first and second transmitting and receiving devices comprises:a transceiver for carrying out radio communications with its party;two or more receiving antennas separated apart by a predetermined distance;a direction finder for determining, in response to a radio signal caught by each of said receiving antennas, an incident angle of the radio signal on said receiving antennas; anda controller for controlling transmitting and receiving of a data packet to and from said party,wherein said controller measures a distance between said first and second transmitting and receiving devices in response to a transmitting time of said data packet and a received time of said radio signal from said party, and a direction with respect to said party in response to said incident angle detected by said direction finder,wherein said transceiver of each of said first and second transmitting and receiving devices comprises:a packet assembler for assembling data packet to which a synchronizing code is added;transmitting means for modulating an output of said packet assembler and radiating a modulated signal as radio waves;a timer for measuring a time period from transmitting said data packet to receiving a data packet transmitted from said party;a first synchronization detector for detecting said synchronizing code from said output of said packet assembler to start said timer;receiving means for demodulating said data packet from an output from said receiving antenna;a second synchronization detector for detecting said synchronizing code from an output of said receiving means to stop said timer; anda packet disassembler for extracting said data packet from the output of said receiving means, andwherein said controller calculates the distance to said party in accordance with a difference between a transmitting time of a signal carrying said data packet and a received time of a response signal from said party to said data packet measured by said timer.

이 특허를 인용한 특허 (81) 인용/피인용 타임라인 분석

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