GPON GTC frame-forming sublayer based on FPGA

A framing and framing technology, applied in digital transmission systems, electrical components, error prevention, etc., can solve the problems of weak TDM service capacity, limited bandwidth, and low efficiency of EPON IP services.

Inactive Publication Date: 2009-04-15
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to overcome the shortcomings of the existing EPON based on the Ethernet protocol, such as low IP service efficiency, weak ability to carry TDM services, and limited bandwid...

Method used

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  • GPON GTC frame-forming sublayer based on FPGA
  • GPON GTC frame-forming sublayer based on FPGA
  • GPON GTC frame-forming sublayer based on FPGA

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0063] The present invention will be further described below in conjunction with the accompanying drawings.

[0064] refer to Figure 1 to Figure 9 , a kind of FPGA-based GPON GTC framing sublayer, in the GPON GTC framing sublayer, the data flow of the GTC framing sublayer is divided into upstream and downstream for processing, and the downstream data flow is sent by the OLT to the ONU, After being deframed by the TC layer, it is sent to the adaptation layer; the upstream data stream is the user demand information, which is sent to the OLT after being processed by the TC layer in the ONU. The data processing process is implemented in the FPGA, including:

[0065] In the downlink direction, the 1244Mbit / s high-speed serial bit stream and its clock signal are sent to the frame synchronization module after deceleration processing to adapt to the working rate of the FPGA. Search the frame header of the downlink frame to complete frame synchronization; after synchronization, if th...

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Abstract

The invention relates to a GPON GTC framing sub-layer based on FPGA. In the GPON GTC framing sub-layer, a data flow of a GTC framing sub-layer is divided into two paths of uplink and downlink to be treated. The downlink data flow is sent to an ONU by an OLT and is sent to an adaptation layer after the de-framing treatment by a TC layer. In the uplink flow, information required by users is sent to the OLT after the framing treatment of the TC layer in the ONU. The data treatment process is realized in FPGA. The GPON GTC framing sub-layer which has high IP business efficiency and strong TDM business bearing capacity, is based on FPGA, and can provide wider bandwidth for users is provided.

Description

technical field [0001] The invention relates to a GPON GTC framing sublayer design program. Background technique [0002] The rapid development of broadband networks and the continuous emergence of various high-bandwidth services and applications have put the introduction of broadband optical fiber access network technology on the agenda. At present, the construction of fiber-to-the-home (FTTH) in North America and Japan has been launched on a large scale, while domestic FTTH Experiments have been implemented in some places, and there are endless discussions in the industry on this aspect. At present, there are three main technologies applied to broadband optical fiber access network, they are multi-service transmission technology (MSTP) based on synchronous digital hierarchy (SDH), multi-service passive optical network technology (PON) and multi-service point-to-point optical terminal ( P2P or MC), has the following characteristics: [0003] 1. MSTP has high service quali...

Claims

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Application Information

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IPC IPC(8): H04L29/06H04L12/56H04L1/00
Inventor 孟利民金钟
Owner ZHEJIANG UNIV OF TECH
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