Back to results
US 5,671,214 AGranted
System for processing synchronization signals with phase synchronization in a mobile communication network
AssigneeNEC Corporation
InventorHironao Tanaka
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeNEC Corporation
InventorHironao Tanaka
Estimating the term…
For synchronization signals of zeroth and first series, a synchronization signal processing system comprises synchronization trunk device of the zeroth and the first series (77(0), 77(1)) for producing particular signals of the zeroth and the first series, respectively, and being exclusively operable in master and slave states. When used in a switching center of a low hierarchy, each trunk device of a local series, which is one of the zeroth and the first series, is supplied as three input signals with the synchronization signals of the local series and a different series with highest (1) and middle (2) degrees of priority and the particular signal of the different series with a lowest (3) degree of priority, selects as a normal signal according to the degrees one of the synchronization signals in the master state and one of the three input signals in the slave state that are normal, and generates as the particular signal of the local series a regenerated synchronization signal with its phase adjusted to the normal signal. A relay trunk device of the local series (95(0), 95(1)) is supplied with the particular signals of the local and the different series with higher (1) and lower (2) degrees of priority and selects as a phase synchronized synchronization signal of the local series according to the higher and the lower degrees one of the particular signals that is normal.
A synchronization signal processing system comprising:
A synchronization signal processing system for use in a highest hierarchy mobile service switching center, said synchronization signal processing system comprising:
Dependencies are inferred from the claim text.