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Device and method for UBR business control

A business control and controlled technology, applied in the direction of data exchange through path configuration, advanced technology, data exchange network, etc., can solve the problems of packet destruction, effective packet output rate drop, waste of network resources, etc., to prevent load increase, The effect of improving service quality and business efficiency

Inactive Publication Date: 2004-02-11
LG NORTEL CO
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, if any of the cells that make up the packet are discarded in the switch of the switching device experiencing congestion, the destination end user assumes that the entire packet has been corrupted and requests retransmission
In this way, the effective packet output rate in the network drops, and network resources are wasted

Method used

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  • Device and method for UBR business control
  • Device and method for UBR business control
  • Device and method for UBR business control

Examples

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Embodiment Construction

[0025] In the prior art switching equipment, there is no backpressure function for feeding back service control information, and the UBR service is controlled in the following manner. First, the cell traffic output from the ATM switch is measured at the egress user terminal, and thus the traffic status of the switching terminal is analyzed. Based on this analysis, the UBR bandwidth is determined. Information about the determined UBR bandwidth is carried in the reverse control information element, and the information is output to the ingress user terminal. Then, the entrance user terminal determines the UBR service amount according to the UBR service information included in the control letter, and inputs the corresponding amount of UBR service to the switching terminal.

[0026] As shown in FIG. 1 , the prior art UBR service control device includes a subscriber board A and a subscriber board B, which respectively include entrance user terminals 100A and 100B and exit user term...

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Abstract

UBR traffic control apparatus and methods can control UBR bandwidth according to cell traffic state and congestion occurrence at the switch terminal. Preferred embodiments can include an egress subscriber terminal that monitors congestion of cells at the switch terminal and traffic state to generate UBR bandwidth information, and an ingress subscriber terminal that outputs UBR cells to the switch terminal according to the generated UBR bandwidth information. Preferred embodiments can increase or maximize UBR traffic by flexibly increasing, decreasing or maintaining UBR bandwidth in consideration of the cells' congestion experience at the switch terminal, the egress subscriber terminal's buffer threshold value and traffic load. By managing cell traffic state for each transmitting subscriber board and by determining subscriber boards to be controlled in consideration of the traffic state at the time of UBR bandwidth's increase or decrease, the preferred embodiments may improve the quality of UBR service.

Description

technical field [0001] The present invention relates to UBR (Uncertain Bit Rate) traffic control in ATM (Asynchronous Transfer Mode) switching equipment. More specifically, the present invention relates to a UBR service control device and method, which can reduce cell service congestion of an ATM switch, and increase UBR service efficiency of a receiving terminal to increase capacity. Background technique [0002] Typically, ATM switches connect user cells from ingress user terminals to egress user terminals, which must handle various types of traffic, including voice, data or image signals, in a manner that satisfies relevant QoS (Quality of Service) standards. [0003] ATM services can be divided into the following 3 categories: (i) CBR (Constant Bit Rate) services, nrt-CBR (Non-Real Time Variable Bit Rate) services, and rt-VBR (Real Time Variable Bit Rate) services, which guarantee call request (ii) ABR (Available Bit Rate) traffic, which is transmitted over the availabl...

Claims

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Application Information

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IPC IPC(8): H04L12/56
CPCH04L47/30H04L2012/5635H04L2012/5682H04L47/10H04L47/2416H04L47/20H04L12/5601H04L47/11Y02B60/31H04L47/263H04L49/30H04L49/3081Y02D30/50
Inventor 河城宇咸宗根
Owner LG NORTEL CO
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