[특허]Handover method in mobile communication system

[미국특허] Handover method in mobile communication system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04Q-007/20
출원번호	US-0968066 (1997-11-12)
우선권정보	JP-0304422 (1996-11-15)
발명자 / 주소	Kusaki Tsutomu,JPX Sakamoto Kenichi,JPX Murakami Masaru,JPX Yokoyama Takashi,JPX
출원인 / 주소	Hitachi, Ltd., JPX
대리인 / 주소	Sofer & Haroun, LLP
인용정보	피인용 횟수 : 18 인용 특허 : 3

초록 ▼

In a mobile communication system having an ATM-processed transfer path, a non-instantaneous interrupt handover can be realized. In a mobile communication network including an ATM-processed transfer path, when a mobile station is moved between cells during communication, frames are received to be identified by a mobile switching center. The frames contain the same data received from both base stations covering the cell range at asynchronous timing different from each other. A selection is made of header information with the lowest error rate from the header information of these frames. The frames are connected at instructed timing. Also, the frames to be transmitted to a plurality of base stations are duplicated, and then transmission timing is specified from these header information. These duplicated frames are transmitted at the specified transmission timing, so that the non-instantaneous interrupt handover is carried out.

대표청구항 ▼

[ What is claimed is:] [1.] A handover method of a mobile communication system in a wireless communication system including a plurality of base stations communicated with a plurality of wireless stations, and a mobile switching center connected to a plurality of said base stations, comprising:a step for initiating a handover process operation in order that while any of said wireless stations is connected to a first base station, said any wireless station should be newly connected to a second base station irrelevant to said first station;a step such that said wireless station is newly connected to said second base station while keeping the connection with said first base station by said wireless station;a step such that said first and second base stations convert the transmission information from said wireless station into an ATM cell and then transmits said ATM cell to said mobile switching center;a step such that mobile switching center receives a first ATM cell transmitted by said first base station and a second ATM cell transmitted by said second base station;a step such that said first ATM cell and said second ATM cell, which are received as asynchronous timing, corresponds to a step for temporarily storing said first and second ATM cells received in the asynchronous timing into a buffer so as to be synchronized with each other;a step for calculating error rates of said first and second ATM cells synchronized with each other;a step for selecting such an ATM cell whose error rate is lower than that of the other ATM; anda step such that when such a condition that the error rate of said second ATM cell exceeds the error rate of said first ATM cell becomes a normal condition, the connection between said wireless station and said first base station is cut out.

이 특허에 인용된 특허 (3) 인용/피인용 타임라인 분석

Abu-Amara Marwan ; Sides Steve ; Jalali Ahmad ; Boppana Jyoti ; Doctor Satyajit, CDMA inter-mobile switching center soft hand-off.
상세보기
Hemmady Jayant G. (Naperville IL) Spanke Ronald A. (Wheaton IL), System and method for providing soft handoff of a cellular mobile-to-mobile call.
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Baldwin John H. (Morristown NJ) Chu Helen (New York NY) Doshi Bharat T. (Holmdel NJ) Dravida Subrahmanyam (Somerset NJ) Nanda Sanjiv (Plainsboro NJ) Treventi Philip A. (Murray Hill NJ), Virtual circuit management in cellular telecommunications.
상세보기

이 특허를 인용한 특허 (18) 인용/피인용 타임라인 분석

Woxberg, Fredrik; Almehag, Lorens; Lindskog, Jan, Advance resource allocations for association state transitions for wireless LAN system.
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Sato, Hiroyuki; Murata, Yasukazu; Sakata, Syuji; Yamano, Satoru, Cell flow synchronization establishing system of wireless ATM access system.
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Yoneta,Tsuyoshi, Communication method used in mobile communication system.
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Zohoungbogbo, Mathias C., Dietetic food composition and dietetic method using such composition.
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Ohtani, Tomoyuki; Tamura, Motoshi; Satoh, Takaaki; Morikawa, Hiroki; Ishino, Fumiaki, Frame synchronization circuit.
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Ohtani,Tomoyuki; Tamura,Motoshi; Satoh,Takaaki; Morikawa,Hiroki; Ishino,Fumiaki, Frame synchronization circuit.
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Ohtani,Tomoyuki; Tamura,Motoshi; Satoh,Takaaki; Morikawa,Hiroki; Ishino,Fumiaki, Frame synchronization circuit.
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Kusaki, Tsutomu; Sakamoto, Kenichi; Murakami, Masaru; Yokoyama, Takashi, Handover method in mobile communication system.
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De Vriendt, Johan Andre, Method and arrangement for transmission of data in a mobile network.
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Suciu, Lucian; Benzaid, Mounir; Guillouard, Karine, Method for transferring a flow between heterogeneous access points.
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Zeira, Eldad; Zeira, Ariela; Terry, Stephen E., Method of using a mobile unit to determine whether to commence handover.
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Willars, Per Hans Ake; Näsman, Karl Anders, Methods and arrangements in a radio communications system.
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Nitta Yoshio,JPX, Mobile communication system capable of being connected to wireless line only during actual data communication.
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Qi, Bi; Vitebsky, Stanley; Yang, Yang, Providing handoff in a spread spectrum wireless communications system for high rate packet data.
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Wikman,Anders, Synchronization in diversity handover.
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Lee, Bo; Wang, Yvonne, System and method for a virtual soft handover in a high data rate network based on data transmission information.
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Patel, Mahesh; Mukhejee, Subrata; Kolar, Sridhar, System and method for switching media packets for packet-based communication in a mobile communications network.
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Narasimha, Murali, Wireless communication device and method for making a secure transfer of a communication connection.
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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

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[미국특허] Handover method in mobile communication system 원문보기