Method of transmitting time-critical information in a synchronous Ethernet system

A technology for transmitting time and critical information, applied in transmission systems, synchronization devices, digital transmission systems, etc., can solve problems such as loss of uplink asynchronous frame transmission

Inactive Publication Date: 2006-05-03
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] Considering that a pause event is created when packets fill up to a threshold in the receive buffer, a buffer overflow during Δt causes transmission loss of upstream asynchronous frames

Method used

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  • Method of transmitting time-critical information in a synchronous Ethernet system
  • Method of transmitting time-critical information in a synchronous Ethernet system
  • Method of transmitting time-critical information in a synchronous Ethernet system

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Embodiment Construction

[0031] Embodiments of the present invention will be described below with reference to the drawings. For clarity and conciseness, well-known functions or constructions are not described in detail since they might obscure the invention.

[0032] Although pause frames are described in the following description as events that require time-critical control, they are illustrative only. Therefore, it should be appreciated that other time-critical OAM (Operation, Administration and Maintenance) information other than pause frames may also be sent according to embodiments of the present invention.

[0033] Figure 4 The generation and transmission of a pause frame as a time-critical control signal in a synchronous Ethernet system according to an embodiment of the present invention is shown.

[0034] When a pause event occurs during an asynchronous frame period 42 of a 125 μs transmission cycle, a pause frame is generated and sent as a time-critical control signal, as in a typical Eth...

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Abstract

Disclosed is a method for enabling the transmission of time-critical control signals in a synchronous frame period, such as a pause signal generated when the receive buffer of an Ethernet switch is filled with packets exceeding a threshold due to congestion of uplink asynchronous data . In order to transfer time-critical information in Synchronous Ethernet systems, when a time-critical event is detected, the current transmission time period is checked. If the current transmission time period is a synchronization frame time period, time-critical control information is generated, inserted into the first sub-synchronization frame and transmitted after the time-critical event. If the current transmission time period is an asynchronous frame time period, a control frame including the time-critical control information is generated and transmitted.

Description

technical field [0001] The present invention relates generally to a synchronous Ethernet system, and more particularly to a method for enabling the transmission of time-critical control signals that may be in a synchronous frame period, e.g. Pause signal generated when a switch's receive buffer fills with packets exceeding a threshold. Background technique [0002] Ethernet is one of the most widely used LAN (Local Area Network) technologies. It has been standardized as IEEE (Institute of Electrical and Electronics Engineers) 802.3. [0003] Typically, Ethernet devices use the IEEE 802.3 compliant CSMA / CD (Carrier Sense Multiple Access / Collision Detection) protocol to compete for access to the network. The device transmits an upper layer service frame as an Ethernet frame with an IFG (Interframe Gap) in between. Note that upper layer service frames are delivered in the order in which they are generated, regardless of their type. [0004] Although it is known that Etherne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/28H04L29/02H04L29/06
CPCH04L47/10H04L47/13H04L47/2416H04L47/2466H04L47/30H04L7/02
Inventor 赵宰宪高俊豪金钟权沈昌燮吴润济洪尚模尹钟浩
Owner SAMSUNG ELECTRONICS CO LTD
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