DVB-SH

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DVB-SH ("Digital Video Broadcasting - Satellite services to Handhelds") is a physical layer standard for delivering IP based media content and data to handheld terminals such as mobile phones or PDAs, based on a hybrid satellite/terrestrial downlink and for example a GPRS uplink. The DVB Project published the DVB-SH standard in February 2007. [1]

Digital Video Broadcasting open standard for digital television broadcasting

Digital Video Broadcasting (DVB) is a set of international open standards for digital television. DVB standards are maintained by the DVB Project, an international industry consortium, and are published by a Joint Technical Committee (JTC) of the European Telecommunications Standards Institute (ETSI), European Committee for Electrotechnical Standardization (CENELEC) and European Broadcasting Union (EBU).

Contents

The DVB-SH system was designed for frequencies below 3 GHz, supporting UHF band, L Band or S-band. It complements and improves the existing DVB-H physical layer standard. Like its sister specification (DVB-H), it is based on DVB IP Datacast (IPDC) delivery, electronic service guides and service purchase and protection standards.

DVB-H is one of three prevalent mobile TV formats. It is a technical specification for bringing broadcast services to mobile handsets. DVB-H was formally adopted as ETSI standard EN 302 304 in November 2004. The DVB-H specification can be downloaded from the official DVB-H website. From March 2008, DVB-H is officially endorsed by the European Union as the "preferred technology for terrestrial mobile broadcasting". The major competitors of this technology are Qualcomm's MediaFLO system, the 3G cellular system based MBMS mobile-TV standard, and the ATSC-M/H format in the U.S. DVB-SH now and DVB-NGH in the future are possible enhancements to DVB-H, providing improved spectral efficiency and better modulation flexibility. DVB-H has been a commercial failure, and the service is no longer on-air. Ukraine was the last country with a nationwide broadcast in DVB-H.

DVB-SH specifies two operational modes:

Single-frequency network

A single-frequency network or SFN is a broadcast network where several transmitters simultaneously send the same signal over the same frequency channel.

Comparison with DVB-H

DVB-SH supported spectrum Frequencies.jpg
DVB-SH supported spectrum

The DVB-SH incorporates a number of enhancements when compared to DVB-H:

Recently[ when? ], results from BMCO forum [ citation needed ] (Alcatel April 2008) shows a radio improvement of at least 5.5 dB on signal requirements between DVB-H and DVB-SH in the UHF frequencies. The improvements to signal requirements translates to better in-building penetration, better in-car coverage and extension of outdoor coverage. DVB-SH chipsets are being developed now by DiBcom and NXP Semiconductors, and are expected to be available in beginning of 2008. Initial specifications show that the chipsets supports both UHF and S-Band and are compatible with DVB-H.

DiBcom was a French fabless semiconductor company that designs chipsets for low-power mobile TV and radio reception. Its chipsets are compliant with the current worldwide Digital Video Broadcasting standards DVB-T, DVB-T2, DVB-H, DVB-SH, with ATSC-M/H, ISDB-T, CMMB and with DAB, DAB+, DMB in multistandard programmable platforms. It specializes in antenna diversity demodulator chipsets with a built-in tuner to minimize component count.

NXP Semiconductors company

NXP Semiconductors N.V. is a Dutch global semiconductor manufacturer headquartered in Eindhoven, Netherlands. The company employs approximately 31,000 people in more than 35 countries, including 11,200 engineers in 33 countries. NXP reported revenue of $6.1 billion in 2015, including one month of revenue contribution from recently merged Freescale Semiconductor.

DiBcom has announced a DVB-SH chip with availability in 2008 Q3. Dibcom DVB-SH 2008 Q3. The chip "has dual RF tuners supporting VHF, UHF, L-Band and S-Band frequencies".

Project organization

French Agence de l'innovation industrielle is now[ when? ] financing this effort through TVMSL, a project led by Alcatel-Lucent that plans to develop a DVB-SH standard suitable for hybrid satellite and terrestrial transmission. Other partners involved in TVMSL are Sagem Wireless, Alenia, RFS, Philips, DiBcom, TeamCast, UDcast, CNRS, INRIA, CEA-LETI. [2]

Satellites

ICO, one of the biggest satellite operators in the United States, in 2007 announced a nationwide deployment of an hybrid satellite/terrestrial network in DVB-SH with Alcatel-Lucent [3] and Expway. [4] ICO G1 satellite carrying DVB-SH technology on board was launched on April 14, 2008. It is the world's first DVB-SH satellite in orbit.

Eutelsat W2A satellite carrying a Solaris Mobile (a Eutelsat and SES joint venture, now EchoStar Mobile) DVB-SH S band payload was launched on 3 April 2009. It will cover Western Europe. [5] [6] [7] S-band payload was scheduled to enter into service in May 2009 but this not occurred due to an anomaly currently being investigated. [8] On 1 July 2009, Solaris Mobile filed the insurance claim. The technical findings indicate that the company should be able to offer some, but not all of the services it was planning to offer. [9]

Inmarsat's S band satellite programme, called EuropaSat, will deliver mobile multimedia broadcast, mobile two-way broadband telecommunications and next-generation MSS services across all member states of the European Union and as far east as Moscow and Ankara by means of a hybrid satellite/terrestrial network. It will be built by Thales Alenia Space and launched in early 2011 by ILS. [10]

Trials

DVB-H/SH trials are now[ when? ] underway in many cities and countries: Ireland, [11] United Kingdom, [12] Malaysia, Singapore, [13] Helsinki, Berlin, Cambridge, Pittsburgh, Paris, Tehran, Madrid, Sydney, [14] South Africa, Taiwan, [15] The Hague, Brussels, Bern, Vienna, New Zealand, [16] Philippines, Copenhagen, Budapest, Erlangen, [17] Sri Lanka, Roeselare, and India.

DVB-SH in S-band is seen as an alternative in Europe. Recent[ when? ] field trials and studies showed better performance in radio than DVB-H standard that would lead to much lower costs for network deployments.[ citation needed ]

In France again, SFR and Alcatel-Lucent teamed up to deploy a DVB-SH trial. The results confirmed the theoretical assumptions on the superiority of the DVB-SH over DVB-H, being the natural evolution of this legacy technology. [18]

In Italy, 3 Italia, RAI and Alcatel-Lucent joined forces for the first DVB-SH trial in Italy. [19]

In United States, Dish Network and Alcatel-Lucent joined forces for the first DVB-SH trial in US. [20] [ citation needed ]

See also

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References

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  4. Expway’s FastESG Solution Selected by ICO Global Communications for Mobile TV Services Archived 2011-07-10 at the Wayback Machine
  5. Eutelsat satellite fleet :: W2A satellite at 10 degrees East
  6. Solaris Mobile
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  8. Satellite Services - Satellite TV & Communications - SES.com
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  17. DVB-H Versuchssender Erlangen Archived 2007-08-17 at the Wayback Machine
  18. SFR and Alcatel-Lucent tests in the field validate the fundamental assumptions for the deployment of a DVB-SH Mobile TV terrestrial network
  19. DISH Network Corporation and Alcatel-Lucent to Perform Joint DVB-SH Test in the U.S