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Design and Implementation of DOCSIS Cable Modem

Author: LiHong
Tutor: LiuXiaoMing；LiShiKuan
School: Dalian Maritime University
Course: Electronics and Communication Engineering
Keywords: Cable modem Hybrid fiber coaxial network Embedded operating system Object Oriented Design
CLC: TN76
Type: Master's thesis
Year: 2004
Downloads: 124
Quote: 0
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Abstract


With the Internet, multimedia applications and other network popularization and development, leading to a huge demand for network bandwidth, the traditional narrowband access rate of only tens of kbit / s has been far short of needs, such as network video on demand, interactive network games multimedia web browsing and so on applications requiring higher bandwidth, broadband access network development to become a new impetus, and this provides a huge opportunity. Currently the existing network suitable for broadband services are mainly hybrid fiber coaxial (HFC) network and access to the public telephone system UTP. HFC network is mainly used in cable television systems, the core backbone network using optical fiber, the client uses coaxial cable, the network has a good shielding performance, wide bandwidth, etc., is ideal for the construction of broadband access networks, currently in HFC broadband The main access technology is a cable modem, the downlink bandwidth of up to 40Mbps, upstream return rate up 10Mbps, the rate is the traditional dial-up access to hundreds of times. This article discusses a high-performance cable modem design and implementation. This article focuses on the current based on Broadcom's Bcm3348 integration and cost-effective chip design and implementation process. Whole article is divided into eight parts: the first sub-chapter briefly describes the current development of broadband networks, focusing on the hybrid fiber coaxial cable system network. The second chapter describes the current HFC network of broadband access standard DOCSIS. The third chapter of an engineering point of view discusses the whole program options include the choice of the core chip and software development platform of choice, the hardware module design and software design, which uses advanced software embedded real-time operating system technology, and utilized in the design of functional and object-oriented hierarchical approach to design and use, and to ensure the system's maintainability, scalability, portability, reusability. Chapter IV section and fifth sections describe in detail the various hardware modules and software modules specific design content. Chapter VI describes several problem solving and critical analysis of Part VII of the times, made a comprehensive summary of product development. Discussed herein DCM520 DOCSIS cable modem fit well with the specification, design advanced methods. And after rigorous testing to achieve mass production of standard products to the domestic leading level.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Basic electronic circuits > Modulation technique and the modulator,demodulator and the demodulator
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