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 Title: |
US6324405:
Communications apparatus and method for mobile platforms having a plurality of users
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Young, Eddy Ka Ping; Kingston-Upon-Thames, United Kingdom
Lu, Sze-Ching; Surrey, United Kingdom
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| Assignee: |
ICO Services Ltd., London, United Kingdom
other patents from ICO SERVICES LTD. (762886) (approx. 19)
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| Published / Filed: |
2001-11-27
/ 1997-09-09
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| Application Number: |
US1997000926073
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| IPC Code: |
Advanced:
H04B 7/15;
H04B 7/185;
H04Q 7/34;
Core:
more...
IPC-7:
H04Q 7/20;
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| ECLA Code: |
H04B7/185B4B; H04B7/185M8B2;
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| U.S. Class: |
Current:
455/456.1;
455/012.1;
455/427;
455/431;
455/558;
Original:
455/456;
455/012.1;
455/427;
455/431;
455/558;
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| Field of Search: |
455/427-428,430,12.1,13.1,550,552,557-558,426,431,456,572
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| Priority Number: |
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| Abstract: |
A multi user communications terminal apparatus providing simultaneous access for a plurality of users to a communications network in which the geographical locations of each user are registered and periodically updated,
the terminal apparatus comprising a plurality of user terminals (320) each including electroacoustic transducers (34,36); and a common RF unit (304) comprising a shared RF amplifier (342) for coupling to a shared antenna system (302),
in which the terminal apparatus comprises means (348) for transmitting common location updating signals, and is arranged not to transmit separate location update signals for every one of said users.
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| Attorney, Agent or Firm: |
McDermott, Will & Emery ;
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| Primary / Asst. Examiners: |
Maung, Nay;
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| Maintenance Status: |
E1 Expired Check current status
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| INPADOC Legal Status: |
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Family Legal Status Report
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| Designated Country: |
DE FI FR GB NL SE
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| Family: |
Show 7 known family members
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First Claim:
Show all 14 claims |
What is claimed is:
1. A multi user communications terminal apparatus providing simultaneous access for a plurality of users to a communications network in which the geographical locations of each user are registered and periodically updated,
- the terminal apparatus comprising a plurality of user terminals (320) each including electroacoustic transducers (34, 36); and a common RF unit (304) comprising a shared RF amplifier (342) for coupling to a shared antenna system (302),
- in which the terminal apparatus comprises a transmitter (348) for transmitting common location updating signals, and is arranged not to transmit separate location update signals for every one of said users;
- further comprising a control device coupled to control the power supplied by the shared amplifier,
- wherein on attempted initiation of an outgoing call by a user, the apparatus is arranged to determine whether sufficient power would be available to continue communication with said network if a call were set up, and is arranged not to complete the call unless sufficient power would be available.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 145 U.S. patent(s) that reference this one
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| Foreign References: |
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| Other Abstract Info: |
DERABS G1998-133375
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| Other References: |
Pettifor, J. D.et al, "An overview of Aeronautical Telecommunications in Europe and World Wide," BT Technololgy Journal, vol. 14, No. 3, Jul. 1996, pp. 64-73.
(10 pages)
Cited by 3 patents
[ISI abstract]
Peter C.J. van der Arend, "security Aspects and the Implementation in the GSM-System", Digital Cellular Radio Conference (DCRC) Conference Proceedings, Oct. 12-14, 1988, published by Deutsche Bundespost, France Telecom and FernUniversitate, pp. 4a/1-4a/6.
Araki et al., Proceedings of The Third International Mobile Satellite Conference IMSC 1993 (JPL publication 93-009), pp. 529-534, published by Jet Propulsion Laboratories (1993).
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