Computerized device and method for analyzing signals in a multimedia over coax alliance (MOCA) network and similar TDM / encrypted networks
AssigneeSpirent Communications, Inc.
InventorsDouglas Grinkemeyer, David Dailey
Life of this patent
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Abstract
The present invention relates to testing signals on a coaxial home network that carries a digital video signal. It has direct application to testing so-called Multimedia over Coax Alliance (MoCA) standards-compliant networks and applies to similar networks. In one mode, a computerized device joins the MoCA network and relays signals intended for a set-top-box to the STB. In another mode, the computerized device joins the MoCA network instead of the STB and tests signal strength, attenuation and similar physical layer characteristics.
Claims20
A method of testing MoCA signals routed to a set-top-box and evaluating performance of the set-top-box, including:
- coupling a computerized device to a physical medium, in position between a set-top-box (abbreviated “STB”) and a signal source;
- the computerized device joining at a physical layer a first MoCA network to which the signal source belongs by emulating at the first physical layer a STB;
- the computerized device creating at a physical layer a second MoCA network coupled to the STB by acting as a network controller at the second physical layer;
- the computerized device bridging both command and content packets between the first and second MoCA networks, thereby connecting the STB and the signal source;
- the computerized device analyzing packets received from the first MoCA network that comprise a video signal to evaluate a quality of the video signal;
- and
- the computerized device reporting the quality of the video signal while bridging the video signal to the STB, whereby a user can view output of the STB on a TV or monitor.
A method of testing MoCA networks and signals exchanged between a set-top-box and a router and between the set-top-box and additional MoCA enabled devices, including:
- coupling a computerized device to a physical medium, in position between a set-top-box (abbreviated “STB”) and a signal source;
- the computerized device joining at a physical layer a first MoCA network to which the signal source belongs by emulating at the first physical layer a STB;
- the computerized device creating at a physical layer a second MoCA network coupled to the STB by acting as a network controller at the second physical layer;
- the computerized device bridging packets from the STB to at least one remote MoCA device, the bridged packets including requests for and a streamed video signal;
- the computerized device measuring signal bandwidth of packets bridged between first and second networks and calculating dropped and errored packet statistics;
- the computerized device analyzing packets received from the first MoCA network that comprise a video signal to evaluate a quality of the video signal;
- and
- the computerized device reporting at least the measured signal bandwidth and a quality of a video signal received from the remote MoCA enabled device.
A device used to test MoCA signals routed to a set-top-box and evaluating performance of the set-top-box, including:
- first and second MoCA signal processors, in communication with each other, with an effective extent of RF isolation between each other;
- a first coaxial port coupled to the first MoCA signal processor and a second coaxial port coupled the second MoCA signal processor;
- a display viewable by a user;
- logic running on hardware, the hardware coupled to the first and second MoCA signal processors and to the display, the logic adapted to
- bridge control and content packets exchanged between first and second MoCA enabled devices that communicate through the first and second coaxial ports, including emulating at a first physical layer the second MoCA enabled device to the first MoCA enabled device and emulating at a second physical layer the first MoCA enabled device to the second MoCA enabled device,
- analyze packets received from the first MoCA enabled device that comprise a video signal to evaluate a quality of the video signal, and
- report on the display a summary of the quality of the video signal while bridging the video signal packets to the second MoCA enabled device, whereby a user the second MoCA enabled device can view video on a TV or monitor while the quality of the video signal is reported.
A device used to test MoCA signals routed to a set-top-box and evaluating performance of the set-top-box, including:
- a first MoCA signal processor;
- a first coaxial port coupled to the first MoCA signal processor;
- a display viewable by a user;
- logic running on hardware, the hardware coupled to the first MoCA signal processor and to the display, the logic adapted to
- emulate a properly functioning STB,
- analyze signal bandwidth and the packets received from via the first coaxial port to evaluate a quality of packet exchange, and
- report on the display a summary of the signal bandwidth and the quality of the packet exchange.
Dependencies are inferred from the claim text.