WAY SYNC RING transport network built on the basis TRANSMISSION SYSTEMS Synchronous Digital Hierarchy

摘要

method of synchronizing ring transport network, built on the basis of the transfer system enabling synchronous digital hierarchy (u0441u0446u0438) and u0441u043eu0441u0442u043eu00a0u0449u0435u0439 of primary and back-up and u0441u0442u043eu0447u043du0438u043au043eu0432 synchronization signals, the main and backup of network elements, n network elements of the right side of the ring, the left parts if m network elements ca,u0441u0432u00a0u0437u0430u043du043du044bu0445 main and standby u043fu0443u0442u00a0u043c u0434u043bu00a0 transmission synchronization u0437u0430u043au043bu044eu0447u0430u044eu0449u0438u0439u0441u00a0 is the leading network element clock signal under the u0430u044eu0442 from main source of signals to synchronize the first priority, to reserve the network element clock signal is the first priority from the main source of signal synchronization through the n network elementsand on the second priority from the reserve source signals synchronizing with clock signal from the main source has a high level of quality and (Q4) than the clock signal from the reserve source (q8).in the right part of the clock signal from the main source of the main path (first priority) comes from the main lead network element after u0434u043eu0432u0430u0442u0435u043bu044cu043du0443u044e chain of n network elements, and the last in the chain of network element transmits to reserve the network element from which singh u0440u043eu043du0438u0437u0438u0440u0443u0435u0442u0441u00a0 reserve source synchronization signals.on the reserve path (second) clock signal from the reserve source of signal synchronization in a network element serving reserve and after u0434u043eu0432u0430u0442u0435u043bu044cu043du0443u044e chain of n network elements, and the first network element of the right side of the main ring is a leading network elementin the left part of the clock signal from the main source of the main path (first priority) serves from the core network element through the lead u043eu0432u0430u0442u0435u043bu044cu043du0443u044e chain network elements to the network element to the left side of the ring (mm)the clock signal from the reserve source of signal synchronization, the reserve path (second) pass through reserve a network element and pic u043bu0435u0434u043eu0432u0430u0442u0435u043bu044cu043du0443u044e chain network elements to the first network element to the left of the ring (m1), u043eu0442u043bu0438u0447u0430u044eu0449u0438u0439u0441u00a0 orderhow to reserve the network element synchronization signals are from two directions: from the last (nn st) of the right side of the ring with the first priority and the last (mm ') of the left side of the ring with the second priority in reserve as the network element signal output to t4, formed around the internal gay u043du0435u0440u0430u0442u043eu0440u0430, serve to the t3 of the network elementwith the u0432u043du043eu0441u00a0u0442 change (decrease) u0437u043du0430u0447u0435u043du0438u00a0 u0443u0440u043eu0432u043du00a0 quality of transmitted signal synchronized with the first element to the left of the ring (m1 ') signal u0441u0438u043du0445u0440 u043eu043du0438u0437u0430u0446u0438u0438 on the reserve path serves to the lead pillar on the third priority.