Multiplex communications – Wide area network – Packet switching
Patent
1978-08-25
1980-11-04
Stewart, David L.
Multiplex communications
Wide area network
Packet switching
370104, 255 12, H04J 306
Patent
active
042321972
ABSTRACT:
The present invention provides a processor for interfacing a TDMA burst modem (40), which transmits and receives bursts of information at high data rates in assigned time slots, and slow speed terminal processing equipment. The present processor comprises circuitry (50) capable of detecting frame or superframe markers in a received sequence and regenerating such markers, after initiation, at the normal interval for such markers despite false alarms or missed marker signals. Other circuitry (53, 57 and 52, 62) causes a memory (48, 56) to directly output a burst of information during an assigned time slot to the modem (40) and directly store received information from modem (40) during a predetermined interval which is designed to start before and end after the expected arrival of an assigned burst. Slower processing equipment is then used to find and process the burst in the stored information.
REFERENCES:
patent: 3532985 (1970-10-01), Glomb
patent: 3562432 (1971-02-01), Gabbard
patent: 3641274 (1972-02-01), Sasaki
patent: 3643031 (1972-02-01), Sasaki
patent: 3730998 (1973-05-01), Schmidt
patent: 3787634 (1974-01-01), Haberle
patent: 3995111 (1976-11-01), Tsuji
patent: 4054753 (1977-10-01), Kaul
IEEE Transactions on Communications, vol. com-16, No. 4, Aug. 1968, "Design of a Satellite Time Division Multiple Access Burst Synchronizer", by Gabbard, pp. 589-596.
Electronic Letters, vol. 9, No. 4, Nov. 1973, "New Snychronization Scheme for Communication-Satellite TDMA Systems", by A. K. Jefferis, pp. 566-568.
Acampora Anthony
Langseth Rollin E.
Bell Telephone Laboratories Incorporated
Pfeifle Erwin W.
Stewart David L.
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