[특허]Method for inter-IP-domain roaming across wireless networks

[미국특허] Method for inter-IP-domain roaming across wireless networks 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04Q-007/00
출원번호	US-0338291 (1999-06-22)
발명자 / 주소	Jiann-Ching Chiou TW Yuh-Rong Leu TW Ming-Young You TW
출원인 / 주소	Institute For Information Industry TW
인용정보	피인용 횟수 : 183 인용 특허 : 7

초록 ▼

A method involves in integrating the communication mechanisms of IAPP and mobile IP is provided for allowing a mobile station to roam among various APs in different IP subnets. When a mobile station roams to a new IP subnet, it will issue a reassociation request to an Access Point A in the new IP subnet. In response to the reassociation request, the Access Point A will need the IP address of the previous Access Point B in the previous IP subnet to send the handoff request to the Access Point B. So, the Access Point A can find the IP address of the Access Point B via the communication mechanism of mobile IP of IP layer and then send the handoff request frame to the Access Point B. In turn, upon receiving the handoff request frame, the Access Point B deletes the record of the mobile station in the association table and then sends the handoff response frame back to the Access Point A via the communication mechanism of mobile IR. The unicast handoff response frame will be forwarded to the Access Point A. Consequently, the Access Point A can complete the handoff procedure.

대표청구항 ▼

1. A method for routing datagrams across wireless networks, said wireless networks comprising a plurality of wireless LANs each located in a unique IP subnet, comprising the steps of:providing a Home Agent and a Home Access Point for a mobile station at its initial wireless LAN; providing a first Foreign Agent and a first Access Point for said mobile station at a first destination wireless LAN; receiving a reassociation request frame from said mobile station when said mobile station roams directly from said initial wireless LAN to said first destination wireless LAN; sending a handoff request frame from said first Access Point to said first Foreign Agent after finishing a reassociation procedure; using the MAC address of said mobile station to lookup the IP address of said Home Agent in the registration table of said first Foreign Agent when said mobile station has successfully registered to said first Foreign Agent; establishing a proxy IAPP table in said first Foreign Agent for said mobile station, said proxy IAPP table comprising the MAC address of said mobile station, and the source IP address of said handoff request frame; forwarding said handoff request frame to said Home Agent according to said IP address of said Home Agent found in said registration table; looking up the IP address of last Foreign Agent for said mobile station in said registration table of said Home Agent; when said IP address of the last Foreign Agent is found, forwarding said handoff request frame to said last Foreign Agent; when said IP address of said last Foreign Agent is not found, determining said last Foreign Agent being the same as said Home Agent; looking up association table and when said MAC address of said mobile station is not in said association table, broadcasting said handoff request frame in said initial wireless LAN; deleting a record of said mobile station from an association table of said Home Access Point, and then sending a unicast handoff response frame from said Home Access Point to said Home Agent in response to said broadcast handoff request frame; sending a unicast handoff response frame from said Home Agent to said first Foreign Agent according to a source IP address recorded in said proxy IAPP table of said Home Agent; sending said unicast handoff response frame from said first Foreign Agent to said first Access Point according to said source IP address recorded in said proxy IAPP table of said first Foreign Agent; and deleting a record from the handoff list of said first Access Point when said mobile station has ever sent a handoff request frame, thereby to complete a handoff request procedure.

이 특허에 인용된 특허 (7) 인용/피인용 타임라인 분석

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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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[미국특허] Method for inter-IP-domain roaming across wireless networks 원문보기

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[미국특허] Method for inter-IP-domain roaming across wireless networks 원문보기

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대표청구항 ▼

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