[특허]Mobile communication system with cell-site switching for intra-cell handoff

Mobile communication system with cell-site switching for intra-cell handoff 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04J-003/16
출원번호	US-0087887 (1993-07-09)
우선권정보	JP-0181405 (1992-07-09); JP-0183269 (1992-07-10)
발명자 / 주소	Taketsugu Masanori (Tokyo JPX) Furuya Yukitsuna (Tokyo JPX)
출원인 / 주소	NEC Corporation (Tokyo JPX 03)
인용정보	피인용 횟수 : 117 인용 특허 : 0

초록 ▼

In a TDMA cellular mobile communication system, incoming signals from the public switched network are converted by speech coder/data compressor units of a MTSO (mobile telephone switching office) to low-bit-rate signals and combined into a first TDM signal for transmission to a base station. The components of the first TDM signal are respectively routed according to a channel assignment signal and fed into desired modulators which are periodically activated according to the channel assignment signal to transmit signals on assigned channels to mobile units. Signals from the mobile units are received by demodulators at the base station and combined into a second TDM signal which is transmitted to the MTSO. The components of the second TDM signal are routed according to the channel assignment signal to appropriate speech decoder/data expander units for conversion to the original high-bit-rate signals for transmission to the network.

대표청구항 ▼

A cellular mobile communication system comprising: a mobile switching center comprising: a plurality of high-to-low bit rate converters for providing high to low bit rate conversion on signals from a switched network to produce low bit rate signals; multiplexer means for composing said low bit rate signals from the high-to-low bit rate converters into a multiplex of low bit rate signals and transmitting the multiplex of low bit rate signals over a first transmission medium; demultiplexer means for decomposing a multiplex of low bit rate signals from a second transmission medium into low bit rate component signals; a plurality of low-to-high bit rate converters for respectively providing low to high bit rate conversion on the low bit rate component signals from the demultiplexer means and supplying high bit rate signals to the switched network; and a controller for receiving a call request from the network; and a base station comprising: a controller for receiving a call request from mobile units, the controllers of the mobile switching center and the base station cooperating with each other in response to each of the respectively received call requests to produce a first channel assignment signal and transmitting the first channel assignment signal to a said mobile unit; a plurality of modulators for establishing a plurality of forward channels; demultiplexer means for decomposing the multiplex of said low bit rate signals from said first transmission medium into low bit rate component signals and applying the low bit rate component signals to said modulators according to said first channel assignment signal; a plurality of demodulators for establishing a plurality of reverse channels; and multiplexer means for transmitting outputs of said demodulators as said multiplex of low bit rate signals over said second transmission medium to the mobile switching center, the controller of the base station being responsive to an intra-cell handoff request from the said mobile unit for cooperating with the controller of the mobile switching center to produce a second channel assignment signal and applying the second channel assignment signal to said demultiplexer means of the base station to cause a said low bit rate component signal from said first transmission medium to be applied to another one of said modulators, and transmitting said second channel assignment signal to the said mobile unit.

이 특허를 인용한 특허 (117)

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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
구성항목	기본정보 상세정보 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표IPC 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 공고번호, 공고일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표출원인, 출원인국적, 출원인주소, 발명자, 발명자E, 발명자코드, 발명자주소, 발명자 우편번호, 발명자국적, 대표IPC, IPC코드, 요약, 미국특허분류, 대리인주소, 대리인코드, 대리인(한글), 대리인(영문), 국제공개일자, 국제공개번호, 국제출원일자, 국제출원번호, 우선권, 우선권주장일, 우선권국가, 우선권출원번호, 원출원일자, 원출원번호, 지정국, Citing Patents, Cited Patents
저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

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Mobile communication system with cell-site switching for intra-cell handoff 원문보기

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연합인증

Mobile communication system with cell-site switching for intra-cell handoff 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

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이 특허를 인용한 특허 (117)

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IPC 상위 출원인

AI-Helper ※ AI-Helper는 오픈소스 모델을 사용합니다.

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