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Ethernet switching method and device for synchronous time division switching in Ethernet

A technology of switching equipment and time division switching, applied in the field of network and Ethernet, which can solve the problems of high cost and low speed of E1 interface and E1TDM line

Active Publication Date: 2008-07-02
NEW H3C TECH CO LTD
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The above-mentioned 2.048MHz E1 interface used for data synchronous time-division exchange not only has low speed, but also has high cost of E1 interface and E1 TDM line

Method used

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  • Ethernet switching method and device for synchronous time division switching in Ethernet
  • Ethernet switching method and device for synchronous time division switching in Ethernet
  • Ethernet switching method and device for synchronous time division switching in Ethernet

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Embodiment Construction

[0048] As mentioned above, the present invention also provides an Ethernet switching method and corresponding Ethernet switching equipment to realize synchronous time-division switching on the widely used low-cost Ethernet. Moreover, its main realization idea is to utilize the existing TDM switching mechanism.

[0049] However, for an Ethernet interface that intends to use the existing TDM switching mechanism to perform data synchronous time-division switching, similar to the E1 interface described in the background technology, its sending and receiving directions require periodic clock signals, periodic frame synchronization signals and synchronous data signals. In order to obtain input / output time slots participating in time division switching according to the frame synchronization cycle. For this reason, the present invention transforms the Ethernet interface into a bidirectional TDM interface by adopting a fixed-length Ethernet frame.

[0050] The following will first ref...

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PUM

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Abstract

The invention relates to an exchanging method of an Ethernet network, which is used in data synchronous time-division switching between interfaces that contain Ethernet interfaces. The Ethernet interfaces use unit transfer time of Ethernet frames with a constant length as a frame synchronous period, which is divided into an input time slot and an output time slot according to unit transfer time of bytes and carries out periodic circle numbering of the input time slot and the output time slot according to the frame synchronous period; with the coordination of synchronous information, the Ethernet interface receives and sends data according to time slot numbers and the data go through synchronous time-division switching by using the time slots as a unit. The invention relates to Ethernet switching equipment (300) which comprises a TDM exchanging unit (310), a synchronous unit (320) used for keep network synchronous, n Ethernet interfaces (330) and / or m E1 interface (340) or a TDM interface of integer multiple E1 speed. N is more than or equal to 1, m is more than or equal to 0, in addition, n plus m is more than or equal to 2. The method realizes flexible synchronous time-division switching of data in the Ethernet frames.

Description

technical field [0001] The present invention relates to network field, relate in particular to the field of Ethernet; Ethernet switching device. Background technique [0002] Time-division service data often needs to reach the user end at a constant rate, and the existing circuit switching can better guarantee the QoS (Quality of Service, network service quality) of the time-division service. The existing circuit switching has two systems: PDH (Plesiochronous Digital Hierarchy, quasi-synchronous digital hierarchy) and SDH (Synchronous Digital Hierarchy, synchronous digital hierarchy) / SONET (Synchronous Optical NETwork, synchronous optical network). Multiplexing and fixed-length frame structure. [0003] TDM (Time Division Multiplexing, time division multiplexing) switching, also called time division switching, is typically applied to multiple TDM interfaces in digital program-controlled switches. The TDM interface has the same frame synchronization, generally 8KHz, and us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q11/04H04J3/06H04L12/04H04L12/28
CPCH04L12/417H04J3/0685H04L12/40013H04L49/351
Inventor 于洋王玮李晶林魏初舜
Owner NEW H3C TECH CO LTD
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