Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Patent
1996-12-11
2000-10-24
Tsang, Fan
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
455432, H04Q 720
Patent
active
061380199
ABSTRACT:
A cellular communication system hand-off protocol which helps minimize down time associated with a mobile device roaming among different cells in which different cells employ different communication channels (e.g., different frequency hopping sequences). In a preferred embodiment, each base station is configured to communicate its own particular hopping sequence to the host computer via the system backbone. Each base station then provides to mobile devices which are registered thereto information regarding the particular hopping sequences employed by other base stations servicing cells into which the mobile device may roam. Such information includes the particular hopping sequences together with an indication of what location in the sequence the base stations are currently at in any given time. In addition, such information may include an indication of the intervals at which a base station is configured to transmit a beacon packet (for passive scanning operation), or at what intervals test pattern packets are transmitted to allow for signal quality evaluation.
REFERENCES:
patent: 4554668 (1985-11-01), Deman et al.
patent: 5123029 (1992-06-01), Bantz et al.
patent: 5287384 (1994-02-01), Avery et al.
patent: 5317623 (1994-05-01), Sakamoto et al.
patent: 5325419 (1994-06-01), Connolly et al.
patent: 5329531 (1994-07-01), Diepstraten et al.
patent: 5386435 (1995-01-01), Cooper et al.
patent: 5425049 (1995-06-01), Dent et al.
patent: 5446769 (1995-08-01), Shaver et al.
patent: 5519706 (1996-05-01), Bantz et al.
patent: 5574979 (1996-11-01), West
patent: 5619493 (1997-04-01), Ritz et al.
patent: 5655217 (1997-08-01), Lemson et al.
patent: 5737358 (1998-04-01), Ritz et al.
patent: 5748669 (1998-05-01), Yada
patent: 5771353 (1998-06-01), Eggelston et al.
patent: 5794145 (1998-08-01), Milan
patent: 5848064 (1998-12-01), Cowan
patent: 5862142 (1999-01-01), Takiyasu et al.
IPCCC '92, pp. 0255-0259, "A Hybrid Indoor Data Network with Radio and Wire Performance Evaluation in a Rayleigh Channel" by Kaname Arai, Hiroshi Shigeno, Teruo Yokoyama, Yutaka Matsushita.
Belanger Philip H.
Shah Nainesh P.
Smith Douglas A.
Spry Andrew J.
Trompower Michael L.
Cisco Systems Inc.
Tran Congvan
Tsang Fan
LandOfFree
Cellular system hand-off protocol does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Cellular system hand-off protocol, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cellular system hand-off protocol will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1974337