EP0368673A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Communications system
Assignee: British Telecommunications PLC
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Filing: 1989-11-10
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Granted: —
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Expires: 2009-11-10
Abstract
Abstract A communications system has a base centre with radio transceivers 15 for providing a number of radio frequency (RF) communications links and a plurality of fixed radio ports 1 through which RF signals can be transmitted and received over the air. A fibre optic network (2, 4) interconnects the RF transceivers 15 and the fixed radio ports 1, and carrys the RF signals by means of optical signals. There are plurality of radio/optical interfaces by which RF signals can be modulated onto and demodulated from one or more optical signals, between the RF transceivers and the fibre optic network, and between the fibre optic network and the fixed radio ports. A matrix switch 13 selectively interconnects the transceivers and the radio ports through the fibre optic network.
Inventors
- 👤 Andrew James Motley
- 👤 Anthony Gerard Chadney
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 06:14
CPC Classifications
H; H04; H04W; H04W88/00; H04W88/08; H04W88/085; H04B; H04B10/00; H04B10/25; H04B10/2575; H04B10/25752; H04B10/25753; H04W36/00; H04W36/16; H04W36/18
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
110 words
A communications system comprising: a base centre having one or more radio transceivers for providing a number of radio frequency (RF) communications links; a plurality of fixed radio ports through which RF signals can be transmitted and received over the air; a fibre optic network for interconnecting the RF transceivers and the fixed radio ports, and for carrying the RF signals by means of optical signals; a plurality of radio/optical interfaces by which RF signals can be modulated onto and demodulated from one or more optical signals, which interfaces are between the RF transceivers and the fibre optic network, and between the fibre optic network and the fixed radio ports.
Claim 2
Dependent Claim
110 words
A communications system comprising: a base centre having one or more radio transceivers for providing a number of radio frequency (RF) communications links; a plurality of fixed radio ports through which RF signals can be transmitted and received over the air; a fibre optic network for interconnecting the RF transceivers and the fixed radio ports, and for carrying the RF signals by means of optical signals; a plurality of radio/optical interfaces by which RF signals can be modulated onto and demodulated from one or more optical signals, which interfaces are between the RF transceivers and the fibre optic network, and between the fibre optic network and the fixed radio ports.
Claim 3
Dependent Claim
128 words
A communications system comprising: a base centre having one or more radio transceivers for providing a number of radio frequency (RF) communications links; a plurality of fixed radio ports through which RF signals can be transmitted and received over the air; a fibre optic network for interconnecting the RF transceivers and the fixed radio ports, and for carrying the RF signals by means of optical signals; a plurality of radio/optical interfaces by which RF signals can be modulated onto and demodulated from one or more optical signals, which interfaces are between the RF transceivers and the fibre optic network, and between the fibre optic network and the fixed radio ports; and a matrix switch for selectively interconnecting the transceivers and the radio ports through the fibre optic network.
Claim 4
Dependent Claim
128 words
A communications system comprising: a base centre having one or more radio transceivers for providing a number of radio frequency (RF) communications links; a plurality of fixed radio ports through which RF signals can be transmitted and received over the air; a fibre optic network for interconnecting the RF transceivers and the fixed radio ports, and for carrying the RF signals by means of optical signals; a plurality of radio/optical interfaces by which RF signals can be modulated onto and demodulated from one or more optical signals, which interfaces are between the RF transceivers and the fibre optic network, and between the fibre optic network and the fixed radio ports; and a matrix switch for selectively interconnecting the transceivers and the radio ports through the fibre optic network.
Claim 5
Dependent Claim
16 words
A communications system as claimed in claim 2 wherein the RF links are frequency division multiplexed.
Claim 6
Dependent Claim
16 words
A communications system as claimed in claim 2 wherein the RF links are time division multiplexed.
Claim 7
Dependent Claim
29 words
A communications system as claimed in claim 2, 3 or 4, wherein there is means for combining RF signals to or from one or more of the RF ports.
Claim 8
Dependent Claim
42 words
A communications system as claimed in any one of claims 2 to 5 wherein the matrix switch is for switching optical signals and between the optical matrix switch and the one or more RF transceivers there are one or more RF/optical interfaces.
Claim 9
Dependent Claim
39 words
A communications system as claimed in any of claims 2 to 5 wherein the matrix switch is for switching RF signals, and between the RF matrix switch and the fibre optic network there are one or more RF/optical interfaces.
Claim 10
Dependent Claim
22 words
A communications system as claimed in any preceding claim wherein there is multiplexing/demultiplexing of the optical signals in the fibre optic network.
Claim 11
Dependent Claim
20 words
A communications system as claimed in any preceding claim wherein the fibre optic network incorporates wavelength routing of optical signals.
Claim 12
Dependent Claim
39 words
A communication system as described in any preceding claim which call handover is between radio ports is controlled in the base centre through switching the radio transceiver from one radio port to another radio port by the matrix switch.
Claim 13
Dependent Claim
28 words
A communication system as claimed in any preceding claim which diversity operation is provided by combining or switching between two or more radio points in the matrix switching.
Claim 14
Dependent Claim
19 words
A communication system as claimed in any preceding claim which dynamic channel allocation is controlled in the base centre.
References Cited (Backward Citations)
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