Device for realizing synchronous transport module level-1 (STM-1) multipath Ethernet over E1 conversion

A protocol conversion and interface technology, applied in the field of protocol converter aggregation, can solve problems such as affecting the promotion of solutions, high prices, etc., to achieve the effect of simple and convenient upgrade and maintenance, obvious price, and freedom from dependence

Inactive Publication Date: 2011-02-16
珠海市佳讯实业有限公司 +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0011] Most domestic manufacturers use chip-mounting solutions to realize the core functions of optical aggregation bridges, but due

Method used

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  • Device for realizing synchronous transport module level-1 (STM-1) multipath Ethernet over E1 conversion
  • Device for realizing synchronous transport module level-1 (STM-1) multipath Ethernet over E1 conversion
  • Device for realizing synchronous transport module level-1 (STM-1) multipath Ethernet over E1 conversion

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Embodiment Construction

[0025] refer to Figure 4 , a device for realizing STM-1 interface aggregation multi-channel Ethernet over E1 protocol conversion, including an STM-1 optical module 1, the STM-1 optical module 1 is connected to a CDR module 2 through a 155M differential signal, and the CDR module 2 The FPGA circuit 3 is connected with a 155M differential signal, and the FPGA circuit 3 is respectively connected with a DDR2SDRAM module 5 and a CPU module 4 through a D / A bus, and the FPGA circuit 3 is connected with a GE PHY chip module 6 through a GMII interface, and the GE The PHY chip module 6 is connected with a GE x 2 interface.

[0026] further reference Figure 5 , as a preferred embodiment, the FPGA circuit 3 includes an STM-1 frame encoding / decoding circuit 31, and the STM-1 frame encoding / decoding circuit 31 is connected with a MAC / HDLC data conversion circuit 32, and the MAC / HDLC The data conversion circuit 32 is connected to a multi-channel switching bridge circuit 33, the STM-1 fra...

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Abstract

The invention discloses a device for realizing synchronous transport module level-1 (STM-1) multipath Ethernet over E1 conversion, which comprises an STM-1 optical module, wherein the STM-1 optical module is connected with a clock and data recovery (CDR) module through a 155M differential signal; the CDR module is connected with an field programmable gat a array (FPGA) circuit through a 155M differential signal; the FPGA circuit is connected with a double data rate 2 synchronous dynamic random access memory (DDR2SDRAM) module and a CPU module; the FPGA circuit is connected with a gigabit Ethernet physical layer (GE PHY) chip module through a gigabit media independent interface (GMII), and the GE PHY chip module is connected with a gigabit Ethernet x 2 (GE x 2) interface. In the invention, a scheme of field programmable chip independent development instead of a chipset scheme is adopted, so the device has an obvious price advantage, gets rid of dependency on imported chips and has an obvious characteristic of independent innovation. The device of the invention can be widely used in the field of communication.

Description

technical field [0001] The invention relates to a protocol converter convergence technology, in particular to a device for realizing STM-1 interface convergence multi-channel Ethernet over E1 protocol conversion. Background technique [0002] Principle of SDH technology: [0003] 1. Byte interleaved multiplexing: SONET / SDH is a technology based on time division multiplexing (TDM). Specifically speaking, the SDH system has a set of standard rate levels. The basic signal transmission level is STM-1, and the high-level signal series STM-4, STM-16, etc., all synchronize low-rate STM-1 through byte interleaving. It is formed by multiplexing, and the number of multiplexing is a multiple of 4. [0004] 2. SDH frame structure: ITU-T stipulates that the STM-N frame is a rectangular block frame structure in units of bytes, such as figure 1 shown. It can be seen from the figure that the STM-N signal has a frame structure of 9 rows×270×N columns. The N here is consistent with the N...

Claims

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Application Information

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IPC IPC(8): H04Q11/00H04L29/06
Inventor 张骏项凌骏向斌张晓聪李超
Owner 珠海市佳讯实业有限公司
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