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	<title>Broadcasting 2.0 &#187; 2009 &#187; July &#187; 24</title>
	<atom:link href="http://www.broadcasting20.org/2009/07/24/feed/" rel="self" type="application/rss+xml" />
	<link>http://www.broadcasting20.org</link>
	<description>Emerging technologies for one-to-many telecommunications</description>
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		<title>Challenges for GPRS and 3G Radio</title>
		<link>http://www.broadcasting20.org/2009/07/24/challenges-for-gprs-and-3g-radio/</link>
		<comments>http://www.broadcasting20.org/2009/07/24/challenges-for-gprs-and-3g-radio/#comments</comments>
		<pubDate>Fri, 24 Jul 2009 15:45:31 +0000</pubDate>
		<dc:creator>Administrator</dc:creator>
				<category><![CDATA[Infrastructures]]></category>
		<category><![CDATA[Mobility]]></category>
		<category><![CDATA[Networked media]]></category>
		<category><![CDATA[public broadcasting]]></category>
		<category><![CDATA[3G]]></category>
		<category><![CDATA[broadcasting 2.0]]></category>
		<category><![CDATA[Internet streaming]]></category>
		<category><![CDATA[mobile]]></category>
		<category><![CDATA[mobile phones]]></category>
		<category><![CDATA[radio]]></category>

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		<description><![CDATA[There is a nice post on the Public Radio Player (PRP) blog about some challenges for Internet radio when distributed over mobile wireless networks and some strategies used in the PRP.

&#8220;A dropped stream is the nemesis of any regular Public Radio Tuner user. Nothing is worse than being caught up in a great public radio [...]]]></description>
			<content:encoded><![CDATA[<p>There is a nice <a href="http://www.publicradioplayer.org/?p=544">post</a> on the <a href="http://www.publicradioplayer.org/">Public Radio Player (PRP) blog</a> about some challenges for Internet radio when distributed over mobile wireless networks and some strategies used in the PRP.</p>
<blockquote>
<p>&#8220;A dropped stream is the nemesis of any regular Public Radio Tuner user. Nothing is worse than being caught up in a great public radio program and have it suddenly cut out&#8230;.&#8221;</p>
</blockquote>
<p>Some challenges can be expected:</p>
<ul>
<li>loss of signal while roaming from cell to cell. Networks are optimized for voice calls but not for data yet.</li>
<li>minimal bitrate like 32 kbps is desirable but connection is still not guaranteed and sound quality is no great</li>
<li>buffers have to be implemented in receiver to mitigate signal loss.</li>
</ul>
<p>Results of a <a href="http://www.pcworld.com/article/167391/a_day_in_the_life_of_3g.html">survey made by PC World</a> suggest that 3G coverage may not be adequate for the delivery of sustained bitrates in major cities in USA. Like <a href="http://www.pcworld.com/zoom?id=167391&amp;page=1&amp;zoomIdx=1">this table shows</a>, networks speeds can be impressive but their reliability vary greatly so that live radio transmissions may be hard to achieve.</p>
<p>There is certainly a lot of room for experimentation here in this new area but I tend to believe that it could take a while before we see 3G replace true &#8220;physical layer&#8221; broadcast networks for live transmissions.</p>
<p></p>
<p></p>
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