| 摘要 |
PCT No. PCT/SE83/00068 Sec. 371 Date Nov. 8, 1983 Sec. 102(e) Date Nov. 8, 1983 PCT Filed Mar. 1, 1983 PCT Pub. No. WO83/03175 PCT Pub. Date Sep. 15, 1983.Method and apparatus for synchronizing the phase of a transit exchange in a digital communication network. The transit exchange has a signal-controlled oscillator with an output signal which depends on the collectively weighted phase difference between the local exchange clock and the clock of the other exchanges. To avoid phase jumps, a signal corresponding to the phase difference is sampled, the sampled values differentiated, the differentiated values compared with a limit value employing a phase jump when exceeded, and when this value is exceeded a signal with the control signal's highest value but with opposite sign is added to form a compensation signal, this compensation signal being added to the differentiated value, and after possible weighting the differentiated value is summed with corresponding differentiated values from comparison with the phases of other links, and the sum value integrated to obtain a resulting control signal. |
