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

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...

AI Technical Summary

Problems solved by technology

[0011] Most domestic manufacturers use chip-mounting solutions to realize the core functions of optical aggregation bridges, but due to the use of a large number of chip-mounting solutions abroad, the price remains high, which affects the promotion of this solution

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