Cell processing method and apparatus in asynchronous transmission mode switchboard

A technology of asynchronous transmission mode and processing method, which is applied in the field of cell processing and can solve problems such as the decline of the processing capacity of the switching system.

Inactive Publication Date: 2002-01-23
LG NORTEL CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] Therefore, the third buffer only reads out one of cells B, A and C, and the remaining two fan-out ports are idle, which reduces the processing capacity of the entire switching system

Method used

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  • Cell processing method and apparatus in asynchronous transmission mode switchboard
  • Cell processing method and apparatus in asynchronous transmission mode switchboard
  • Cell processing method and apparatus in asynchronous transmission mode switchboard

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Embodiment Construction

[0028] The cell processing method and apparatus according to the present invention will be described below with reference to preferred embodiments shown in the accompanying drawings.

[0029] Figure 4 is a schematic diagram representing the structure of a cell processing device in an ATM switch according to the present invention, Figure 5 is a flowchart showing the cell processing method according to the present invention.

[0030] see Figure 4 with 5 , the cell processing method in the ATM switch according to the present invention will be described below.

[0031] First, the addresses of the respective cells are stored in the address queues 120 and 130 (step S10).

[0032] According to the conventional cell duplication system or address duplication system, addresses of multicast cells and unicast cells are stored in an address queue. Conversely, according to the present invention, the ATM switch classifies multicast cells and unicast cells in the shared buffer memory ...

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Abstract

A cell processing method and apparatus in an ATM switch can reduce or prevent cell loss and throughput deterioration of the switch caused by HOL blocking. The cell processing method can include storing unicast cells and multicast cells in a shared buffer memory and storing addresses of the respective cells in different address queues, assigning respective priorities to the cells stored in the shared buffer memory, reading out the cells from the shared buffer memory according to the assigned priorities, and sending the cells read out from the shared buffer memory to fan-out ports and determining the cell to be output when multiple cells reach a fan-out port. The processing apparatus can include a buffer that stores cells inputted to the ATM switch, multicast connection identifier (MCI) address queues that store buffer addresses of multicast cells and unicast address queues for storing buffer addresses of unicast cells. A fan-out port is used for receiving the cell from each address queue and outputing the cell to the corresponding destination.

Description

field of invention [0001] The present invention relates to cell processing in an asynchronous transfer mode (ATM) switch, in particular to a cell processing method and device in an ATM switch using a multicast connection identifier (MCI). Background technique [0002] Multicast is two-way communication between multiple locations, meaning a type of communication between one sender and multiple destinations. For example, multicasting is the same as sending e-mail to all addresses stored in an address book. Multicast is a type of communication used for teleconferences such as video conferencing or teleconferencing, in which one sender sends a video or audio signal to several selected destinations (i.e., locations). Multicast can also be used in For sending video data from a video on demand (VOD) server to a plurality of user set-top boxes. [0003] Unicast, as opposed to multicast, means a type of communication between a sender and a destination. [0004] As conventional mul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/50H04L12/54H04L49/111
CPCH04L47/2433H04L2012/5683H04L49/108H04L49/90H04L49/203H04L2012/5679H04L47/15H04L12/5601H04L49/3081H04L12/50
Inventor 李钟翊
Owner LG NORTEL CO
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