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Cable Modem Termination System

Cable Modem Termination System

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Design Considerations

The increased consumer demand for high quality voice, video and data is the driving force behind the need for new strategies to efficiently use network bandwidth. Consumers demand reliable and robust network infrastructure systems that provide them with increasingly fast download speeds and real-time high definition video and voice. As a result of these demands Multiple System Operators (MSOs) are looking for ways to get more out of their existing cable infrastructure. Cable infrastructure equipment designers are adding intelligence to Cable Modem Termination Systems (CMTS), Set Top Boxes (STB) and cable modems. Adding the ability to first identify the specific content being requested by a subscriber and then allocate the bandwidth to satisfy that subscriber's current need. Adding this type of intelligence along with new networking protocols such as DOCSIS 3.0 frees up bandwidth to provide higher Quality of Service (QoS) to a larger subscriber base.

Cable Modem Termination Systems are complex pieces of electrical hardware that accept data from network fiber and are responsible for the unpacking, processing and encoding of this data for modulation onto an RF signal. This RF signal in turn carries the modulated content over traditional cable lines to the subscriber’s cable modem. The cable modem demodulates the information for interpretation by networked devices such as set top boxes and internet routers. Protocols such as DOCSIS 3.0 are used define data transmission over the cable lines and give network designers IP version 6 compatibility and the ability to bond multiple RF channels to achieve downstream data speeds of up to 160Mbps.

TI's extensive portfolio of analog and embedded processing offerings enables the high data rates needed to process multiple streams of high definition video and voice information. Multi-core DSPs and DaVinci SoCs are used to efficiently partition the decoding, processing and encoding of multiple streams of video and have support for Codecs such as MPEG2 and H.264. TI's synchronous switching controllers combined with high speed NexFETs provide a high efficiency power solution that reduces power consumption and improves the thermal performance of the CMTS. High speed interface options provide flexibility and signal integrity to route data through the board and back plane.

Application Notes (4)

Title Abstract Type Size (KB) Date Views
HTM 8 KB 28 Aug 2009 508
HTM 8 KB 04 Aug 2009 994
HTM 9 KB 14 Oct 2008 597
HTM 9 KB 14 Oct 2008 255

User Guides (6)

Title Abstract Type Size (KB) Date Views
htm 8 KB 03 Feb 2011 1369
htm 8 KB 14 Oct 2008 515
htm 8 KB 14 Oct 2008 570
htm 8 KB 14 Oct 2008 836
htm 8 KB 14 Oct 2008 560
htm 9 KB 20 May 2005 1726
    

Tools and Software

Name Part # Company Software/Tool Type
Code Composer Studio (CCStudio) Integrated Development Environment (IDE) v5 CCSTUDIO Texas Instruments SW Development Tools, IDEs, Compilers
TMS320C6472 Evaluation Module TMDSEVM6472 Texas Instruments Development Kits

Product Bulletin & White Papers

Product Bulletin (1)

Title Abstract Type Size (MB) Date Views
PDF 208 KB 25 Apr 2011 1999

White Papers (4)

Title Abstract Type Size (MB) Date Views
PDF 562 KB 21 Dec 2010 1323
PDF 423 KB 09 Nov 2010 1292
PDF 187 KB 31 Oct 2008 885
HTM 8 KB 14 Oct 2008 522

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