EP0599657A2
Expired / Lapsed
EP
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Mobile radio communication system
Assignee: NEC Corp
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Filing: 1993-11-26
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Granted: —
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Expires: 2013-11-26
Abstract
Abstract A multiplex audio signal from an exchange apparatus (103) is demultiplexed by a first multiplexer/demultiplexer (9) into demultiplexed signals (S1-K) that are supplied to a first switch circuit (7) which switches between transmission paths to apply the demultiplexed signals to a plurality of audio coding circuits (12-m). Certain output signals (dm) from the audio coding circuits are supplied to a second switch circuit (8), time-division-multiplexed, and applied to the first switch circuit (7). The multiplexed signal is outputted from the first switch circuit for transmission in a given time slot over a radio communication path.
Inventors
- 👤 Shigeru Otsuka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 14:16
CPC Classifications
H; H04; H04W; H04W88/00; H04W88/12; H04J; H04J3/00; H04J3/16; H04J3/1605; H04J3/1623; H04J3/1647; H04J3/1682; H04J3/1688; H04W84/00; H04W84/02; H04W84/04; H04W84/042; H04W88/18; H04W88/181
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
242 words
A mobile radio communication system comprising: a plurality of mobile stations; a plurality of radio base stations for communicating with the mobile stations through radio communication paths; and a base station controller for controlling said radio base stations to connect calls to and from said mobile stations through said radio base stations; said base station controller comprising: first switch means for switching between the transmission paths; first multiplexing/demultiplexing means provided between said first switch means and an exchange apparatus for demultiplexing a multiplex signal from an exchange apparatus, outputting demultiplexed signals to said first switch means, multiplexing output signals from said first switch means into a multiplex signal, and transmitting the multiplex signal to the exchange apparatus; second multiplexing/demultiplexing means provided between said first switch means and said radio base stations for multiplexing output signals from said first switch means into a multiplex signal, transmitting the multiplex signal to said radio base stations, demultiplexing a multiplex signal from said radio base stations, and outputting demultiplexed signals to said first switch means; a plurality of audio coding means connected to said first switch means, for converting an audio data signal transmitted from the exchange apparatus and outputted by said first switch means into a coded audio data signal at a lower rate for mobile communication; and second switch means for time-division-multiplexing given output signals from said audio coding means into a multiplex signal, and outputting the multiplex signal to said first switch means.
Claim 2
Dependent Claim
24 words
The mobile radio communication system according to claim 1, wherein said first switch means comprises switch means for switching between signals of 64 Kbps.
Claim 3
Dependent Claim
22 words
The mobile radio communication system according to claim 1, wherein said second switch means is integrally combined with said first switch means.
Claim 4
Dependent Claim
76 words
The mobile radio communication system according to claim 1 wherein said second switch means include means for multiplexing three optional outputs among outputs of said audio coding means if there is no controlling time slot, means for multiplexing two optional outputs among outputs of said audio coding means if there is one controlling time slot, and means for outputting one optional output among outputs of said audio coding means if there are two controlling time slots.
Claim 5
Dependent Claim
211 words
A base station controller for a mobile radio communication system, comprising: first switch means (7) for switching between radio transmission paths; first multiplexing/demultiplexing means (9) provided between said first switch means and an exchange apparatus input for demultiplexing a multiplex signal from an exchange apparatus, and outputting demultiplexed signals to said first switch means, and for multiplexing output signals from said first switch means into a multiplex signal, and transmitting the multiplex signal to the exchange apparatus; second multiplexing/demultiplexing means (6) provided between said first switch means and an output for said radio base stations for multiplexing output signals from said first switch means into a multiplex signal, and transmitting the multiplex signal to said radio base stations, and for demultiplexing a multiplex signal from said radio base stations, and outputting demultiplexed signals to said first switch means; a plurality of audio coding means (12-1,..12m) connected to said first switch means, for converting an audio data signal transmitted from the exchange apparatus and outputted by said first switch means into a coded audio data signal at a lower rate for mobile communication; and second switch means (8) for time-division-multiplexing given output signals from said audio coding means into a multiplex signal, and outputting the multiplex signal to said first switch means.
Claim 6
Independent Claim
156 words
A method of processing mobile radio communication signals which communicate with mobile stations over a plurality of transmission paths, comprising: a first switching step of switching between the transmission paths; demultiplexing a multiplex signal from an exchange apparatus, and outputting demultiplexed signals for said first switching step, and/or multiplexing output signals from said first switching step into a multiplex signal, and transmitting the multiplex signal to the exchange apparatus; multiplexing output signals from said first switching step into a multiplex signal, and transmitting the multiplex signal, and/or demultiplexing a received multiplex signal and outputting demultiplexed signals for said first switching step; converting an audio data signal transmitted from the exchange apparatus and outputted by said first switching step into a coded audio data signal at a lower rate for mobile communication; and a second switching step for time-division-multiplexing coded audio data signals into a multiplex signal and outputting the multiplex signal for said first switching step.
References Cited (Backward Citations)
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