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Number of symbols in a burst =3D 156.25 symbols, and burst time 156.25 x<br= 3.69... =3D 576,92=ECs<brNumber of symbols in TDMA frame is 8 x 156.25 =3D 1250 symbols,<brNumber of symbols in Multiframe is 26 x 1250 symbols.<br<div><div></div><div class=3D"h5"><br<br<br<br<br<br<br<brOn Fri, Jan 7, 2011 at 8:51 AM, Nataraju A B &lt;<a href=3D"mailto:nataraju= ab.tech@gmail.com">natarajuab.tech@gmail.com</a>&gt; wrote:<br&gt;<br&gt; Hi Andreas,<br&gt; Thanks for the speedy reply.<br&gt; The link which sent you is=A0definitely=A0useful. But the very basic q= uestion I wanted to get a clarification was that, what is the drive behind = selection of burst time to be 577us.<br&gt; For example the audio frequency can range upto 4Khz. The sampling freq= uency should be 8Khz. If each sample is of 8 bit accuracy. This lead to 64K= bits of data. ...... =A0If we explore further on these lines we should be = able to correlate to the time 577us for each burst.<br &gt; I wanted some more info these lines. What was/were the drives behind s= election of this burst time. Otherwise what are the other end requirements = led to selection of this burst time and in turn TDMA frame hierarchy.<br &gt; Thanks,<br&gt; Nataraju A B<br&gt; On Fri, Jan 7, 2011 at 7:01 PM, Andreas.Eversberg &lt;<a href=3D"mailt= o:Andreas.Eversberg@versatel.de">Andreas.Eversberg@versatel.de</a>&gt; wrot= e:<br&gt;&gt;<br&gt;&gt; in addition:<br&gt;&gt;<br&gt;&gt; Traffic Multiframe Structures - The 26 traffic multiframe structur= e is<br&gt;&gt; used to send information on the traffic channel. The 26 traffic<br= &gt;&gt; multiframe structure is used to combine user data (traffic), slow<= br&gt;&gt; control signaling (SACCH), and idle time period. The idle time per= iod<br&gt;&gt; allows a mobile device to perform other necessary operations such = as<br&gt;&gt; monitoring the radio signal strength level of a beacon channel fro= m<br&gt;&gt; other cells. The time interval of a 26 frame traffic multiframe is= 6<br&gt;&gt; blocks of speech coder data (120 msec).<br&gt;&gt; (<a href=3D"http://www.althos.com/tutorial/GSM-tutorial-frame-stru= cture.html" target=3D"_blank">http://www.althos.com/tutorial/GSM-tutorial-… rame-structure.html</a>)<br&gt;&gt;<br&gt;&gt; one encoded speech block lasts 20ms.<br&gt;&gt;<br&gt;&gt;<br&gt;&gt; =A0 =A0 =A0 =A0576,92307692307692307692307692308us per slot<br&gt;&gt; =A0 =A0 =A0 =A04615,3846153846153846153846153846 per 8 slots (1 fr= ame)<br&gt;&gt; =A0 =A0 =A0 =A0120ms per 26 frames (6 speech blocks)<br&gt;&gt;<br&gt;&gt;<br&gt;&gt;<br&gt;<br&gt;<br&gt;<br&gt; --<br&gt; Thanks,<br&gt; Nataraju A B<br</div></div></blockquote></div><br><br clear=3D"all"><br>-- <br>Thanks,<div= >Nataraju A B</div><br --00163641691bea689c04996d367c--