Round-trip delay optimization of multiplexed speech channels

Details Round-trip delay optimization of multiplexed speech channels Round-trip delay optimization of multiplexed speech channels

1997-04-18

1999-08-10

Hsu, Alpus H.

Multiplex communications

Communication techniques for information carried in plural...

Adaptive

370429, 370519, 370537, H04J 316, H04J 322

Patent

active

059369647

ABSTRACT:
Data packets are transmitted in forward and backward directions via a multiplexed communications medium, wherein each of the data packets is associated with a corresponding one of a plurality of connections. Transmission is performed by, for each connection, assigning a forward delay limit and a corresponding backward delay limit, wherein the sum of the forward and backward delay limits is equal to a round-trip delay bound for the connection. The assigned forward delay limits are used to determine the order in which the data packets supplied by the plurality of connections will be transmitted in the forward direction. Similarly, the assigned backward delay limits are used to determine the order in which the data packets supplied by the plurality of connections will be transmitted in the backward direction. One embodiment accomplishes the forward and backward delay limit assignments by maintaining forward and backward lists of connection identifiers sorted in, for example, ascending order based on time of connection establishment in the forward direction, and in descending order based on time of connection establishment in the backward direction. In another embodiment, transmission order is determined by sorting arriving data packets at the time of their corresponding connection identifiers, wherein the forward and backward sorting rules are selected so that a sum of a forward transmission delay limit and a backward transmission delay limit is less than or equal to a round-trip delay bound for each connection.

REFERENCES:
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patent: 5745529 (1998-04-01), Heiss
Wen-Tsuen Chen, et al., "A Feasible Framework of Traffic Control on an ATM Wide-Area Network", Computer Networks and ISDN Systems, vol. 27, No. 1, Oct. 1994, pp. 67-83.
Deh-phone K. Hsing, "Simulation and Performance Evaluation of an ATM Multiplexer Using Priority Scheduling", vol. 3 of 3, Dec. 1990, Institute of Electrical and Electronics Engineers, pp. 1946-1952.
Hiroshi Ishida, et al., "A Multiplexing Method in Consideration of Cell Delay Variation", vol. 3, May 1994, Institute of Electrical and Electronics Engineers, pp. 1501-1505.

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