发明名称 BLOCK DATA TRANSMISSION SYSTEM
摘要 PURPOSE:To increase the degree of freedom of the selection of a synchronous pattern and to simplify a synchronous detecting method by transmitting a block-synchronizing flag and block data following it from a frame-synchronizing position successively. CONSTITUTION:Synchronizing flags of data blocks each consisting of (n) bits are transmitted from time slots in phase with a frame-synchronizing bit #1. One frame consists of (m) time slots, and n>m, so one block is transmitted by using more than one frame. When one-block data is transmitted and then there is no data block to be transmitted next, an idle pattern is sent to a transmission line and when transmitted data is generated, the next block is sent from the earliest frame-synchronizing position (#l-1). At a reception side, the detecting operation for the synchronizing flag is started at a frame-synchronizing position and when the synchronizing flag is detected, the synchronizing-flag detection operation is interrupted during the period of block data reception. Once the idle pattern is detected, the operation is restarted.
申请公布号 JPS5730437(A) 申请公布日期 1982.02.18
申请号 JP19800103565 申请日期 1980.07.30
申请人 NIPPON TELEGRAPH & TELEPHONE 发明人 HASHIMOTO HIDEO;KODERA HIROSHI;YASUDA HIROSHI
分类号 H04L29/06;H04L7/04;H04L7/08 主分类号 H04L29/06
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