Software controlled multi-mode bi-directional communication device
AssigneeThomson Licensing
InventorsSimon Lavaud, Rodger Anthony Diemer
Life of this patent
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Abstract
Disclosed are a method and bi-directional communication device, such as a cable modem, for iteratively performing the following steps for each of a plurality of communications channels until a downstream data signal is detected. Selecting a communications channel and checking for a downstream signal having a first bandwidth complying with a first system interface standard, and if the downstream signal having said first bandwidth is not detected, then checking the communications channel for a downstream signal having a second bandwidth complying with a second system interface standard.
Claims25
A method for use in a bi-directional communication device, said method comprising:
- iteratively performing the following steps for each of a plurality of communications channels until a downstream data signal is detected;
- selecting a communications channel from said plurality of communications channels;
- checking for a downstream signal having a first bandwidth complying with a first system interface standard;
- if said downstream signal having said first bandwidth is not detected, checking said selected communications channel for a downstream signal having a second bandwidth complying with a second system interface standard;
- and
- wherein said first and second system interface standards are selected from the group of standards including the North American DOCSIS standard and the European DOCSIS standard.
A multi-mode bi-directional communications device, comprising:
- a diplexer including a high-pass filter and a low-pass filter;
- a tuner for selecting a communications channel from said plurality of communications channels;
- downstream processing circuitry coupled to the high-pass filter for checking for a downstream signal having a first bandwidth complying with a first system interface standard, and if said downstream signal having said first bandwidth is not detected, checking said selected communications channel for a downstream signal having a second bandwidth complying with a second system interface standard;
- and
- upstream processing circuitry coupled to the low-pass filter;
- and
- a detecting means for searching a plurality of communications channels, where each communication channel is checked for acquisition of a downstream data signal complying with one of a plurality of interface standards, prior to checking another communication channel wherein said first and second system interface standards are selected from the group of standard including the North American DOCSIS standard and the European DOCSIS standard.
Dependencies are inferred from the claim text.