Multiplex communications – Wide area network – Packet switching
Patent
1984-08-03
1986-09-09
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
H04J 326
Patent
active
046113223
ABSTRACT:
A traffic load control arrangement for a packet switching system (FIGS. 1A and 1B) uses a circuit (1521) in each trunk controller (131) to determine the call traffic load of the trunk controller. To set up a call path, the central processor (115) of a switch (102) selects a trunk (118) to serve the call and sends a logical channel setup packet (500e) indicating either forced or normal selection to the selected trunk's controller (131). If normal selection is indicated, the selected trunk controller refuses to serve the call and returns a channel setup no-acknowledgement packet (500f) to the central processor if the trunk controller's load exceeds a predetermined level. Otherwise, the trunk controller sets up a channel to serve the call and returns a channel setup acknowledgment packet (500g) to the central processor. In response to the no-acknowledgment packet, the central processor attempts to find another trunk to serve the call. In the case of a toll office (104), if no other trunk can be found and a call setup acknowledgment packet (500n) has not yet been returned by the toll office switch to the preceding switch, the toll office switch returns a call setup no-acknowledgment packet (500o) to the preceding switch. The preceding switch responds to receipt of the no-acknowledgment packet by attempting to find a trunk leading to another switch to serve the call.
REFERENCES:
patent: 2857472 (1958-10-01), Judy
patent: 3142728 (1964-07-01), MacLeod
patent: 4099235 (1978-07-01), Hoschler et al.
patent: 4287592 (1981-09-01), Paulish et al.
patent: 4403286 (1983-09-01), Fry et al.
patent: 4484326 (1984-11-01), Turner
patent: 4507782 (1985-03-01), Kunimasa et al.
J. Rinde, "TYMNET I: An Alternative to Packet Technology", Proc. 3d Int'l Conf. on Computer Comm., (Toronto, Aug. 3-6, 1976), pp. 268-273.
J. L. Grange et al., "Congestion Control for a Packet-Switched Network", Computer Communications, vol. 3, No. 3, Jun. 1980, pp. 106-116.
M. Schwartz et al., "Routing Techniques Used in Computer Communication Networks", IEEE Transactions on Communications, vol. Com-28, No. 4, Apr. 1980, pp. 539-552.
J. H. DeJean et al., "Packet Switching Multiservice Network", Proc. Int'l Switching Symposium, (Montreal, Sep. 21-25, 1981), Session 32C, Paper 1, pp. 1-7.
R. Rettbarg et al., "Development of a Voice Funnel System: Design Report", Bolt Beranek and Newman, Inc., Report No. 4098, (Aug. 1979), pp. II-44 to 47.
N. Sone et al., "Extended DDX Packet Switched Network", Japan Telecommunications Review, Apr. 1981, pp. 167-174.
E. Szurkowski, "The Use of Multi-Stage Switching Networks in the Design of Local Network Packet Switches", IEEE Int'l Conf. on Comms., vol. 2, (1981), pp. 25.2.1-25.2.5.
J. F. Boyle et al., "Transmission/Switching Interfaces and Toll Terminal Equipment", The Bell System Technical Journal, vol. 56, No. 7, Sep. 1977, pp. 1057-1097.
Larson Mikiel L.
Toy Wing N.
AT&T Bell Laboratories
Olms Douglas W.
Volejnicek David
LandOfFree
Traffic load control arrangement and method for a packet switchi does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Traffic load control arrangement and method for a packet switchi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Traffic load control arrangement and method for a packet switchi will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1019085