Characterizing home wiring via AD HOC networking
View Patent ↗The invention is a method of measuring the RF losses among home wiring endpoints using battery-powered “remotes” placed at each accessible endpoint in the home. The remotes use a low power, ad hoc networking technology, e.g. Zigbee, Z-wave, to connect to one another over the home wiring, rather than over the air via antennas as in typical applications of these technologies.
1. A method for measuring RF characteristics of a network, which includes an input port, a plurality of cable lengths, and a plurality of output ports comprising:
a) terminating each input and output port with a remote transmitter capable of transmitting test signals with a unique identifying portion to the other remote transmitters via the cables, capable of measuring RF power levels of received signals from other remote transmitters,
and capable of identifying the unique identifying portion to determine which remote transmitter corresponds to each measurec RF power level;
b) determining RF power levels for test signals transmitted between the input port and each of the output ports;
c) transmitting the RF power levels determined by each remote transmitter to a test meter including a control system;
d) determining lengths of cables and positions of splitters in the network based on the RF power levels;
e) comparing each of the RF power levels between the input and output ports to a threshold power level to determine whether the output port corresponding to the RF power level is suitable for operation of an end device.
2. The method according to claim 1 , further comprising transmitting test signals from one of the remote transmitter into the cable network; and determining whether other remote transmitter receive the test signals via a wireless antenna for identifying the existence of an impairment in the cable network.
3. The method according to claim 1 , further comprising displaying an indication on a display screen of the test meter of whether the comparison of the threshold power level to the RF power level of the test signal from the input port indicates that the output port is suitable for operation of an end device.
4. The method according to claim 1 , wherein step b) includes determining RF power levels for test signals transmitted between each of the output ports.
5. The method according to claim 1 , wherein each remote transmitter includes a network communication module with a transmitter and a receiver;
a connector for attaching the remote to a network cable; and an antenna for transmitting and receiving signals.
6. The method according to claim 4 , wherein step d) includes:
i) receiving the RF power levels for the test signals between the input port and the output port at a test meter; and
ii) determining the length of cable and the existence of a splitter based on known resistance measurements stored in memory in the control system.
7. The method according to claim 1 , further comprising transmitting an acknowledgement signal from each remote transmitter to the test meter through the air in a wireless mode, to ensure all of the remote transmitters are connected to the input port.