E1 emulation realization method

Abstract

The invention discloses an E1 emulation realization method, which relates to the field of network simulation and comprises the following steps of: performing protocol encapsulation on a direction, and performing serialization processing on received data to generate a real-time transport protocol value; assembling a time division multiplexing (TDM) payload into a frame, forming cache data packets by using the processed data, and finishing a corresponding description table; attaching packet headers to the TDM payload, generating control word information and real-time transport protocol information according to configuration, and performing encapsulation according to a protocol; performing clock domain adaptation on the processed data, finishing Ethernet media access control (MAC) processing, and transmitting Ethernet data by using a media independent interface (MII); performing protocol decapsulation on the direction, receiving and caching the Ethernet data, and finishing MAC layer processing; classifying and identifying the Ethernet data packets, extracting the payload and related control bytes, and counting state information; and performing clock recovery on a processed TDM payload code stream, and externally transmitting the processed TDM payload code stream. The method is relatively lower in cost; updating can be performed; and requirements on the performance of a central processing unit (CPU) are reduced, and clock recovery performance is improved.

Description

technical field [0001] The invention relates to the field of network simulation, and relates to a method for realizing E1 simulation. Background technique [0002] With the continuous expansion of IP networks, the development and application focus of IP technology has shifted from the "IP over Everything" stage in the early stage of development to the "Everything over IP" stage. The circuit emulation service based on the packet network provides a method of transmitting traditional circuit switching services on the packet network, which is of great significance to the convergence of modern networks. [0003] TDM Over Packet (TDMOP for short) is a new technology developed on the basis of Time Division Multiplex (TDM for short) and IP. It realizes clock synchronization and signaling transmission through a series of mechanisms Function, "transparently" transmit TDM code stream on the packet network, without any interpretation or translation of the data. TDMOP technology solves...

AI Technical Summary

Problems solved by technology

[0006] 1) The structure is complex and the cost is high

[0007] 2) The support agreement is not flexible enough, and it is troublesome to maintain when the standard is upgraded and new standards appear

[0008] 3) Clock recovery is mainly implemented by software, which takes up a lot of CPU resources and is easily affected by other applications in other CPUs, resulting in reduced clock recovery performance

[0009] 4) The scheduling algorithm for sending E1 data packets uplink is not flexible enough, which will affect the performance of clock recovery when the network environment changes

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