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AssigneeAlcatel
InventorsGert Van Der Plas, Christiaan H. J. Sierens, Denis J. G. Mestdagh
Estimating the term…
To determine the equalisation delay of a substation (S3), the main station (C) of a transmission system measures, during an initial coarse measurement, the time interval between the sending of a first ranging signal to the substation and the receipt of a reply signal. This reply signal has a frequency and amplitude substantially lower than the information signals sent by other substations (S1, S2) of the system to avoid interference therewith. During a subsequent fine measurement the main station measures the time interval between the sending of a second ranging signal and the receipt of a second reply signal having the same characteristics as the information signals. The other substations have to stop transmission of signals during an interval equal to the uncertainty time interval with which the equalisation delay was measured during the coarse measurement. To be able to apply this method, the receiver at the main station includes a device (A2) used to isolate the first reply signal from the information signals and to recognize (COR) them, and a processing unit (PU) to determine the equalisation delay.
Method for determining a first equalisation delay to be used in a first substation (S3) of a transmission system including also at least a second substation (S1/S2), with a known second equalisation delay, and a main station (C) which is coupled to said first and second substations via the cascade connection of a common link (L) and respective individual first (L3) and second (L1/L2) links, the first and second equalisation delays being such that when the sending of information signals to said main station (C) by said first (S3) and second (S1/S2) substations is delayed with their respective first and second equalisation delays, the propagation delays between said main station (C) and each of said first (S3) and second (S1/S2) substations and back are equal to a predetermined propagation delay, said method including the steps of
A main station (C) in a transmission system having a first substation (S3) with a first equalization delay to be determined and at least a second substation (S1/S2) with a known equalization delay, said main station comprising:
Apparatus for determining a first equalization delay to be used in a first substation (S3) of a transmission system including also at least a second substation (S1/S2), with a known second equalization delay, and a main station (C) which is coupled to said first and second substations via the cascade connection of a common link (L) and respective individual first (L3) and second (L1/L2) links, the first and second equalization delays being such that when the sending of information signals to said main station (C) by said first (S3) and second (S1/S2) substations is delayed with their respective first and second equalization delays, the propagation delays between said main station (C) and each of said first (S3) and second (S1/S2) substations and back are equal to a predetermined propagation delay, said apparatus comprising:
Dependencies are inferred from the claim text.