Multiplex communications – Wide area network – Packet switching
Patent
1984-03-29
1986-05-27
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370104, 370100, 375107, 375109, H04J 306, H04J 300, H04L 700, H03K 117
Patent
active
045920508
ABSTRACT:
A mechanism is disclosed for a time division multiple access communications network, to enable the synchronizing of traffic messages between a transmitting and a receiving node. A transmit clock mechanism at the transmitting node includes a slip counter for accumulating a slip count value during consecutive intervals of transmission. The slip count value is transmitted along with the traffic messages over the communications link to the receiving node. A slip count detector is located at the receiving node, for receiving the slip count value and adjusting the receive clock at the receiving node in response to the slip count value. In this manner, a timing slip adjustment which has been made at the transmitting node will have a corresponding timing slip adjustment imposed at the receiving node so as to maintain the proper synchronization between the sending and receiving stations during a time division multiple access communications session.
REFERENCES:
patent: 4005266 (1977-01-01), Lehr et al.
patent: 4144414 (1979-03-01), Nicholas
patent: 4253181 (1981-02-01), Watten
patent: 4494211 (1985-01-01), Schwartz
Chin Wellington
Hoel John E.
International Business Machines - Corporation
Olms Douglas W.
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