TDM FRAME DURATION EQUALS BIT PERIOD OF ONE OF THE ENTERED DIGITAL SIGNALS

摘要

In optical distribution systems, a signal designated for the subscribers is distributed from a transmission point to all network terminations (point-to-multipoint transmission). The receivers connected to a passive optical network are adapted to a common bit repetition rate (frequency). If a requirement for higher data rates arises on one network termination, this requirement can only be met by converting all the receivers. This is not possible without interrupting the service. Furthermore, the conversion entails high costs, since the network termination receivers whose data requirements remain unchanged are also converted. Using a time division multiplexing method, a time division multiplex signal is generated which has a frame which corresponds to one bit period (T) of a digital signal and which is divided up into k time slots (ZS). At least two time slots (ZS) are used for one digital signal and one time slot (ZS) is used in each case for the remaining digital signals. IMAGE