Multiplex communications – Duplex – Communication over free space
Patent
1995-04-28
1997-01-14
Olms, Douglas W.
Multiplex communications
Duplex
Communication over free space
370280, 370337, 379 61, 455 383, H04J 316, H04M 1100
Patent
active
055947379
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to an arrangement for controlling a transmitting/receiving device of base stations and/or mobile units in particular of a cordless telephone system.
Cordless telephone systems, for example systems based on the TDMA principle (Time Division Multiple Access) (for example DECT cordless system, CT2 cordless system etc.) and systems based on the CDMA principle (Code Divisoin Multiple Access), may be designed in such a way that voice to be transmitted is compressed on the transmission side, is transmitted by the transmitting device of the transmitting unit (base station, mobile unit) within a radio link, is received by the receiving device of the receiving unit (mobile unit, base station) and is expandeed (burst technique).
Great Britain reference GB-A-2 249 922 (corresponding to U.S. Pat. No. 5,260,944) discloses, for example, a mobile TDMA radio telecommunication system which has the characteristics mentioned above.
SUMMARY OF THE INVENTION
The object on which the invention is based consists in operating base stations and/or mobile units, in particular of a cordless telephone system, with the lowest possible use of energy.
The present invention is an arrangement for controlling a transmitting/ receiving device of base stations and/or mobile units, in particular of a cordless telephone system, comprising: each of the base stations and the mobile units having a processor, to which a controlling program is assigned and voice to be transmitted being compressed on a transmission side, transmitted by a transmitting device of a first transmitting/receiving device within a radio link and received by a receiving device of a second transmitting/receiving device and expanded; the controlling program effecting actuation of the transmitting device of the transmitting unit substantially only during fixed, predetermined transmission times within a transmission time frame and effecting actuation of the receiving device of the receiving unit substantially only during fixed, predetermined reception times within the transmission time frame; modules for monitoring that determines the transmission time frame, the modules being excepted from the time-related activation.
In the case of base stations and/or mobile units, in particular a cordless telephone system, in order to reduce the use of energy required for the operation of the base station and/or of the mobile unit with the exception of the modules necessary for frame-clock monitoring (e.g. in a transmitting/receiving device of the base station and/or of the mobile unit)--in particular whenever the devices are supplied stationarily, for example via a battery, the transmitting/receiving device is switched on with a certain time lead with respect to the transmission/reception burst (FIG. 4) occurring at periodic time intervals in the transmission technique (for example TDMA or CDMA methods). The lead time may in this case comprise a first part-lead time and a second part-lead time, the first part-lead time being understood as meaning the running up time required by the electronic components of the transmitting/receiving device from the switching-on instant to the beginning of the transmission/reception burst and the second part-lead time being understood as meaning the time which ensures that the transmitting/receiving device is activated during the transmission/reception burst. In order that the transmitting/receiving device is also switched on over the entire duration of the transmission/reception burst, the transmitting/receiving device is switched off with the end of the transmission/reception burst. In this case, as with the switching on of the transmitting/receiving device--in analogy with the second part-lead time provided there--it is also possible to provide a corresponding part-lag time for the switching off of the transmitting/receiving device, in order to ensure that the transmitting/receiving device is also switched on during the entire duration of the transmission/reception burst.
Advantageous further development
REFERENCES:
patent: 5196806 (1993-03-01), Ichihara
patent: 5251325 (1993-10-01), Davis et al.
patent: 5260944 (1993-11-01), Tomabechi
patent: 5278832 (1994-01-01), Binzel et al.
patent: 5493705 (1996-02-01), Tanemura
patent: 5509015 (1996-04-01), Tiedemann
patent: 5517679 (1996-03-01), Yahagi
"Auch ohne Schnur auf Draht", Wolf, Telcom report 10 (1987), Heft 2, pp. 130-137. German.
"Digital European Cordless Telecommunications System" (DECT) Standard (draft prETS 300 175-3) (1991), pp. 1-177.
"Digital European Cordless Telecommunications System" (DECT) Standard (draft prETS 300 175-2) (1991), pp. 1-36.
Olms Douglas W.
Phillips Matthew C.
Siemens Aktiengesellschaft
LandOfFree
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