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AssigneeNEC Corporation
InventorHiroaki Kaneko
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In a synchronous TDM communications system wherein the data is transmitted after being subject to zero, negative or positive justification, a location of a time slot where data having a predetermined length begins, is specified by detecting a pointer. The pointer, which is included in a demultiplexed channel information, is extracted from the demultiplexed channel information. Further, a pointer value indicative of the predetermined length is detected. Still further, a justification status is also detected using the pointer extracted. On the other hand, a timing signal is received which corresponds to the zero justification. A pointer offset is produced using the timing signal, while another pointer offsets are generated by advancing and retarding the pointer offset by one time slot. Subsequently, one of the three offsets is selected depending on the justification status. A comparator compares the pointer offset selected and the pointer value and outputs a signal indicative of the first time slot of the data in the event that the comparison coincidence has been detected.
A method of determining a location of a time slot where data having a predetermined length begins by detecting a pointer included in a demultiplexed channel information in a synchronous TDM communications system, the data being transmitted after being subject to zero, negative or positive justification, said method comprising the steps of:
An arrangement of determining a location of a time slot where data having a predetermined length begins by detecting a pointer included in a demultiplexed channel information in a synchronous TDM communications system, the data being transmitted after being subject to zero, negative or positive justification, said arrangement comprising:
Dependencies are inferred from the claim text.