International Business Machines Corporation

Cisco Technology, Inc.

Mahendran Velauthapillai

John Gary Waclawsky

Balasubramanian Kalyanasundaram

The invention provides a system including methods and apparatus that adjust usage of one or more resources of a data communications channel. The system can negotiate a current resource setting for usage of the resource of the communications channel and can perform communications on the communications channel using the resource. The resource can be, for example, a bandwidth setting of the communications channel. Periodically, the system can renegotiate a new value for the current resource setting upon detecting a negotiation event during performance of communications on the communications channel using the resource. One such negotiation event is an indication that an accrued usage cost of the resource of the communications channel substantially equals or exceeds a cost to renegotiate the current resource setting. Another negotiation event indicates that an actual resource setting of the communications channel substantially equals or exceeds the current resource setting for the communications channel. Another negotiation event indicates that a data communications device using the bandwidth setting of the communications channel has requested to negotiate a new value for the current resource setting of the communications channel.

Methods and apparatus for allocating resources in a communications system

A configuration of a communications device, and a method for its operation are provided for automatically and dynamically adjusting bandwidth of a communications channel. The device and method operate to detect events indicating anticipated changes in bandwidth requirements of the communications channel. Such events may be browser or bandwidth related events, for example, that indicate a forthcoming requirement for increased or decreased bandwidth. The device and method then can extract a bandwidth determination factor if available and then calculate a new value for a bandwidth setting of the communications channel in response to detecting such an event and can adjust a bandwidth characteristic of the communications channel according to the new value of the bandwidth setting such that communications channel can accommodate the anticipated change(s) in the bandwidth requirement. The invention can operate in wireless and non-wireless communications systems to cause bandwidth to be adjusted to closely track usage requirements of the communications channel.

Methods and apparatus for dynamic bandwidth adjustment

A system and method monitor and control an Ethernet local area network, by monitoring bit gap distances between adjacent frames communicated by stations on the local area network. By analyzing the number of events for pre-selected bit gap distances, the network traffic characteristics can be characterized and interconnection paths between stations in the network can be altered.

Monitoring ethernet lans using latency with minimum information

A system and method monitors and controls an asynchronous transfer mode (ATM) network having at least two ATM stations. An event driven interface is coupled to the ATM network for monitoring the selected ranges of contiguous non-empty cells and of contiguous empty cells communicated between the ATM stations and outputting count values for selected ranges of contiguous non-empty cells and of contiguous empty cells. An analysis computer is coupled to the output of the event driven interface, for analyzing the count values and outputting control signals. The control signals are used to reorder or change the time of transmission of data at a transmitting ATM station on the communications link, in response to the control signals.

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Adelphi, MD, United States of America

Mahendran Velauthapillai