Bandwidth allocation and congestion control scheme for an integrated voice and data network

Patent 4914650 Issued on April 3, 1990. Estimated Expiration Date:

December 6, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Method of transmitting information and multiplexing device for executing the method
Patent #: 3988545
Issued on: 10/26/1976
Inventor: Kuemmerle , et al.

Multiplexed first-in, first-out queues
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Inventor

Sriram, Kotikalapudi

Assignee

Application

No. 280606 filed on 12/06/1988

US Classes:

370/235, Flow control of data transmission through a network370/412, Queuing arrangement370/468, Assignment of variable bandwidth or time period for transmission or reception370/528Inserted in gaps in main information

Examiners

Primary: Olms, Douglas W.
Assistant: Marcelo, Melvin

Attorney, Agent or Firm

Havill; Richard B.

International Class

H04J 003/26

Abstract

An integrated voice and data network includes a multiplexer arranged with a voice queue for storing voice packets and a data queue for storing data packets. Voice packets are transmitted for a predetermined interval T1. Data packets are transmitted for a predetermined interval T2. The predetermined intervals T1 and T2 may be of different durations. A separate signaling queue can be provided for storing received signaling messages. If a signaling message is moved into the separate signaling queue during either interval T1 and T2, that interval is suspended and the transmission of voice or data packets is interrupted until the entire signaling message is transmitted. Then the interrupted voice or data transmission is resumed for the remainder of the suspended interval T1 or T2. As an alternative, signaling messages can be transmitted during predetermined intervals between the intervals T1 and T2. Block dropping of low order voice bits also is described for reducing congestion at the node. The multiplexer guarantees a certain minimum bandwidth for voice traffic and data traffic. Concurrently, the multiplexer allows each type of traffic to utilize any spare bandwidth momentarily available because it is not being utilized by the other type of traffic. Signaling messages are serviced with very low delay and zero packet loss.

Other References

E. F. Haselton, IEEE Communications Magazine, Sep. 1983, "A PCM Frame Switching Concept Leading to Burst Switching Network Architecture", pp. 13-19
K. Sriram et al., IEEE Jnl on Sel. Areas in Comm., Dec. 1983, "Discrete-Time Analysis of Integrated Voice/Data Multiplexers With and Without Speech Activity Detectors", pp. 1124-1132
E. G. Coffman et al., Performance '87, Dec. 7-9, 1987, "Two Queues With Alternating Service Periods", pp. 227-239
K. Sriram et al., Proc. IEEE Infocom, Mar. 1988, "Traffic Smoothing Effects of Bit Dropping in a Packet Voice Multiplexer", pp. 759-770
D. Sparrell, IEEE GLOBECOM, Nov. 1988, "Wideband Packet Technology", pp. 1612-1616
V. R. Karanam et al., IEEE Global Telecommunications Conference, Nov.-Dec. 1988, "Performance Modeling of Variable Bit Rate Voice in Integrated Packet Networks", pp. 1617-1622
K. Kummerle, ICCC, Aug. 12-14, 1974, "Multiplexor Performance For Integrated Line and Packet-Switched Traffic", pp. 507-51