MMDS Triple Play

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Bill Song@UBS

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Oct 18, 2012, 4:07:29 PM10/18/12
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For many communities, an MMDS Triple Play system is the ideal delivery mechanism for digital television, voice and broadband Internet.  The low, up front cost of an MMDS Triple Play system allows network operators to reach a community quickly and benefit from the increased revenue of offering these in demand services.

MMDS Triple Play systems include digital television (DVB-T), Voice over IP (VoIP) telephony and two way Internet services.  A complete systems involves integration between Head-End, transmission site and customer premises equipment.

UBS designs and manufacturers high performance modulators, power amplifiers, up-converters, filters and passive components for MMDS systems.  In addition, UBS can specify or supply third party components required for a complete turn-key MMDS Triple Play system.
Head-End Equipment
The Head-End equipment can be broken down into two main categories: Digital television equipment and Internet and VoIP equipment.

The digital television equipment can provide MPEG-2 encoded video/audio streams from live television feeds, and optionally from video servers with VOD or other pre-recorded content.  The encoded streams are multiplexed into a DVB compliant MPEG-2 ASI transport stream and delivered to the transmission site through a variety of distribution networks including IP networks, microwave links and satellite delivery.  Availability and price are determining factors.  Electronic program guide and conditional access servers are also used for the digital television service.

The Head-End also contains processing and back office interfaces for the Triple Play network.  A SIP telephone manager is used for VoIP traffic management and processing and a VoIP gateway is used to interface the SIP telephone IP network with a Public Switched Telephone Network (PSTN).

The Internet and VoIP Head-End equipment requires a robust IP network connection to the DOCSIS 2.0/3.0 Wireless Modem Termination System at the transmission site.  The connection must exceed the total bandwidth                   (>30Mbit/sec) of the wireless data network.


Transmission Site
The digital television component utilizes UBS Universal series modulators.  Each modulator can supply up to 8 high quality MPEG-2 SD video channels while occupying 6 MHz of spectrum (dependant on encoder bit rates and modulator settings).

The wireless Internet and Voice over Internet (VoIP) signals use a Wireless Modem Termination System based on the DOCSIS 2.0/3.0 standard which is widely used in the cable industry.  The Internet/Voice equipment is IP based and will deliver Ethernet type traffic.  The VoIP service relies on SIP protocol phones at the customer premises.

The DOCSIS 2.0/3.0 Wireless Modem Termination System typically transmits via a single UBS MMDS transmitter occupying 6 MHz of spectrum.

The Internet and VoIP return channel signals are delivered to a DOCSIS 2.0/3.0 Wireless Modem Termination System via a receive antenna and UBS quad receiver.

The DOCSIS 2.0/3.0 Wireless Modem Termination System at the transmission site requires a robust IP network connection to the Internet and VoIP Head-End equipment.  The connection must exceed (>30 Mbit/sec) the total bandwidth  of the wireless data network.


Customer Premises Equipment
Television programming is delivered using a DVB-T set top box, telephone service is delivered using a VoIP SIP phone via a DOCSIS Modem and Internet access is delivered via an Ethernet interface on the SIP telephone. 

The DVB-T set top box and the DOCSIS modem are connected to an MMDS transceiver through an RF splitter.  The MMDS transceiver is also connected to the customer premises receive/transmit antenna.


UBS MMDS Triple Play System Implementation

UBS can not only design and manufacture key transmission components for MMDS Wireless Triple Play systems, we can also provide complete system design and integration, on-site installation, project management and operator training. 

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