Multiplex communications – Wide area network – Packet switching
Patent
1994-05-23
1996-09-24
Chin, Welllington
Multiplex communications
Wide area network
Packet switching
370 941, H04L 1258
Patent
active
055597971
ABSTRACT:
The invention provides a packet transmission method and apparatus which prevent the holding of unavailable links during packet transmission. An embodiment of the present invention assumes that the case of a packet transmission between transmitting terminal x and receiving terminal y which includes seven of links 0 to 6 and switches 121 to 126. Switches 3 and 5 are provide burst server 101 and 102 respectively, which have a buffer for temporarily holding of a message packet and a function of the packet transmission. The function comprises to request a link reservation, to transmit message packet, to store the received message packet, to release the reserved links upon completing the transmission of message packet. When transmitting terminal x transmits a message packet, burst server 0 starts the packet transmission including the link reservation to burst server 1, and when the packet transmission is completed, reserved links 0, 1, 2 are released. The same packet transmission is repeated consecutively to each burst server until receiving terminal y if the link reservations are not blocked. If a link reservation is blocked at a link, the packet transmission is held the last burst server, and another link reservation is using the same bandwidth or converting the bandwidth to another available bandwidth.
REFERENCES:
patent: 4058672 (1977-11-01), Crager et al.
Stallings, "Data and Computer Communications", 1988, Second Edition, pp. 198-199, 204.
IEEE Communications Society Reprint, "Fast Bandwidth Reservation Scheme with Multi-Link & Multi-Path Routing in ATM Networks", H. Suzuki et al, from IEEE Global Telecommunications Conference Dec. 2-5, 1991.
Chin Welllington
NEC Corporation
Vu Huy D.
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