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Patent Searching and Data


Title:
COMMUNICATIONS SYSTEMS
Document Type and Number:
WIPO Patent Application WO2003003617
Kind Code:
A3
Abstract:
A communications system in which communications stations can transmit and receive more than one carrier frequency simultaneously. Communications channels consisting of simultaneous timeslots on different carrier frequencies are assigned to parties requesting a call depending on the particular data rate requested for the call. The system determines how many timeslots per frame the requested data rate corresponds to and then allocates the appropriate number of timeslots to the channel. Although an integer number of timeslots per frame must be allocated to the channel, the slots may otherwise be allocated in any way desired. Thus, for example, a data rate corresponding to six timeslots per frame could be provided by a channel (channel a) which consists of one slot on each of six different carriers or by a more dispersed allocation of slot 3 on carriers 1 to 4 and slot 4 on carriers 3 and 4 (channel c). A rate of three slots per frame could be provided by a channel (channel b) consisting of slot 2 on carriers 1, 2 and 3. These slot patterns repeat for successive frames.

Inventors:
BALL DIANA MARGARET (GB)
RAYNE MARK WENTWORTH (GB)
WILSON JOHN FRANCIS (GB)
Application Number:
GB0203009W
Publication Date:
June 12, 2003
Filing Date:
June 28, 2002
Export Citation:
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Assignee:
SEPURA LIMITED
BALL, DIANA, MARGARET
RAYNE, MARK, WENTWORTH
WILSON, JOHN, FRANCIS
International Classes:
H04B7/26; H04J4/00; (IPC1-7): H04B7/26; H04J4/00
Domestic Patent References:
WO2002015435A12002-02-21
Foreign References:
EP0680168A21995-11-02
EP0841763A11998-05-13
DE19845057A12000-04-06
US5134615A1992-07-28
US6038221A2000-03-14
Other References:
OJANPER[ ET AL: "FRAMES-hybrid multiple access technology" IEEE ISSSTA. IEEE INTERNATIONAL SYMPOSIUM ON SPREAD SPECTRUM TECHNIQUES AND APPLICATIONS, XX, XX, no. 1, 22 September 1996 (1996-09-22), pages 320-324, XP002077020
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