EP0585030A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Infrared link between a transceiver and an external device
Assignee: Nokia Oyj
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Filing: 1993-08-17
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Granted: —
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Expires: 2013-08-17
Abstract
Abstract A radio telephone system comprising a transceiver unit and an external device, such as a handset, computer or telecopier, in wireless infrared signal communication with the transceiver unit. The information transmitted between the transceiver unit and the external device is transmitted as infrared digital pulses. The infrared pulses maybe transmitted in four digital time division multiplexed channels.
Inventors
- 👤 Toni Sulavuori
- 👤 Mikko Terho
- 👤 Jari Hamalainen
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 15:59
CPC Classifications
H; H04; H04W; H04W88/00; H04W88/02; H04B; H04B10/00; H04B10/11; H04B10/114; H04B10/1143; H04B10/116; H04M; H04M1/00; H04M1/72; H04M1/725; H04M1/737; H04M1/724; H04M1/72403; H04M1/72409; H04M1/72412
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
47 words
A radio telephone system comprising a transceiver unit and an external device in infrared signal communication with the transceiver unit via an infrared link, characterized in that the infrared signals to be transmitted between the transceiver unit and the external device are transmitted in digital pulsed form.
Claim 2
Dependent Claim
17 words
A system as claimed in claim 1, wherein the signal is transmitted as a wireless infrared signal
Claim 3
Dependent Claim
16 words
A system as claimed in claim 1, wherein the signal is transmitted through an optical cable.
Claim 4
Independent Claim
16 words
A system as claimed in any previous claim, wherein the signal comprises speech and data signals.
Claim 5
Independent Claim
24 words
A system as claimed in any previous claim, characterized in that a separate infrared transceiver is connected to the transceiver unit via a cable.
Claim 6
Independent Claim
27 words
A system as claimed in any previous claim, wherein information is transmitted between the transceiver unit and the external device in a digital time division multiplexed channel.
Claim 7
Dependent Claim
34 words
A system as claimed in claim 6, wherein there are four time division multiplexed channels, including one speech channel and one data channel in both directions between the transceiver unit and the external device.
Claim 8
Dependent Claim
49 words
A system as claimed in claim 6 or claim 7, wherein the external device and the infrared transceiver have means to control the transmission and reception of speech and data and to transmit and receive speech and data at a correct moment in the time division multiplexed digital channels.
Claim 9
Dependent Claim
24 words
A system as claimed in claim 5, wherein the external device and the infrared transceiver have means capable of encoding speech into digital form.
Claim 10
Dependent Claim
20 words
A system as claimed in claim 9, wherein the speech encoding means comprise a continuously variable slope delta (CVSD) modulator.
Claim 11
Independent Claim
29 words
A method of transmitting information between an external device and a transceiver unit as an infrared signal, characterized in that the signal is transmitted in a digital pulsed form.
References Cited (Backward Citations)
EP0027833A1
Cited
WO1992010046A1
Cited
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