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<p>And just to add to the confusion, there are usually three antennas per BTS, which cover ~120 degree sectors, so the RF power can be adjusted in each sector individually to give the desired amount of overlap with adjacent cells.</p>
<p>So in terms of physical things to map, we have at least locations, masts, cells, sectors, antennas, and base stations. And possibly microwave backhaul equipment.</p>
<div> </div>
<p><br /></p>
<p>On 2018-11-24 19:47, Sergio Manzi wrote:</p>
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<p>So... how many tags will this node have, once you have tagged all of its components?</p>
<p>From [<a href="https://en.wikipedia.org/wiki/Base_transceiver_station" target="_blank" rel="noopener noreferrer">1</a>]:</p>
<p><br /></p>
<blockquote type="cite" style="padding: 0 0.4em; border-left: #1010ff 2px solid; margin: 0">
<p>A <strong>BTS </strong>is usually <strong>composed of</strong>:</p>
<dl>
<dt>Transceiver (TRX)</dt>
<dd>Provides transmission and reception of signals. It also does sending and reception of signals to and from higher network entities (like the <a class="mw-redirect" title="Base station controller" href="https://en.wikipedia.org/wiki/Base_station_controller" target="_blank" rel="noopener noreferrer">base station controller</a> in mobile telephony).</dd>
<dt>Power amplifier (PA)</dt>
<dd>Amplifies the signal from TRX for transmission through antenna; may be integrated with TRX.</dd>
<dt>Combiner</dt>
<dd>Combines feeds from several TRXs so that they could be sent out through a single antenna. Allows for a reduction in the number of antenna used.</dd>
<dt>Multiplexer</dt>
<dd>For separating sending and receiving signals to/from antenna. Does sending and receiving signals through the same antenna ports (cables to antenna).</dd>
<dt>Antenna</dt>
<dd>This is the structure that the BTS lies underneath; it can be installed as it is or disguised in some way (<a class="new" title="Concealed cell sites (page does not
exist)" href="https://en.wikipedia.org/w/index.php?title=Concealed_cell_sites&action=edit&redlink=1" target="_blank" rel="noopener noreferrer">Concealed cell sites</a>).</dd>
<dt>Alarm extension system</dt>
<dd>Collects working status alarms of various units in the BTS and extends them to operations and maintenance (O&M) monitoring stations.</dd>
<dt>Control function</dt>
<dd>Controls and manages the various units of BTS, including any software. On-the-spot configurations, status changes, software upgrades, etc. are done through the control function.</dd>
<dt>Baseband receiver unit (BBxx)</dt>
<dd>Frequency hopping, signal DSP.</dd>
</dl>
</blockquote>
<p>Mapping each component (<em>yes, the antenna too...</em>) separatly doesn't make much sense to me...</p>
<p>Sergio</p>
<p><br /></p>
<p>[1] <a class="moz-txt-link-freetext" href="https://en.wikipedia.org/wiki/Base_transceiver_station" target="_blank" rel="noopener noreferrer">https://en.wikipedia.org/wiki/Base_transceiver_station</a></p>
<div class="moz-cite-prefix">On 2018-11-24 17:59, François Lacombe wrote:</div>
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<div dir="auto">"BTS" is another object and differ from antennas since the antennas are connected to BTS/nodeB/eNodeB.
<div dir="auto"> </div>
<div dir="auto">Both can be mapped with telecom=* and BTS will often get man_made=street_cabinet</div>
<div dir="auto"> </div>
<div dir="auto">Recently reviewed Telecom=service_device is suitable for "BTS" cabinets with telecom:medium=radio and aditional tags for 3GPP technology 2G/3G or LTE.</div>
<div dir="auto"> </div>
<div dir="auto">Several antennas can be fed by a single radio cabinet </div>
<div dir="auto"> </div>
<div dir="auto">François</div>
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<div class="gmail_quote">
<div dir="ltr">Le sam. 24 nov. 2018 à 15:51, Sergio Manzi <<a href="mailto:smz@smz.it">smz@smz.it</a>> a écrit :</div>
<blockquote class="gmail_quote" style="margin: 0 0 0 .8ex; border-left: 1px #ccc solid; padding-left: 1ex;">
<div>
<p>I like it!</p>
<p>To me it makes much more sense to tag telecom=BTS (Base Transceiver Station, see [<a href="https://en.wikipedia.org/wiki/Base_transceiver_station" target="_blank" rel="noopener noreferrer">1</a>]) than man_made:antenna + antenna:type=whatever.</p>
<p>But BTS is not indicated as possible value for telecom=* in the wiki...</p>
<p>Cheers, </p>
<p>Sergio</p>
<p>[1] <a class="m_2647859477415917583moz-txt-link-freetext" href="https://en.wikipedia.org/wiki/Base_transceiver_station" target="_blank" rel="noopener noreferrer">https://en.wikipedia.org/wiki/Base_transceiver_station</a></p>
<p><br /></p>
<div class="m_2647859477415917583moz-cite-prefix">On 2018-11-24 15:22, François Lacombe wrote:</div>
<blockquote type="cite" style="padding: 0 0.4em; border-left: #1010ff 2px solid; margin: 0">
<div dir="auto">Hi all
<div dir="auto">It would be great to use telecom=* instead of man_made or communications</div>
<div dir="auto"> </div>
<div dir="auto">Antennas is a difgicult topic to address in osm since there can be many of them at the same time. They should be distinguished from mast and supports since antennas are only devices</div>
<div dir="auto"> </div>
<div dir="auto">All the best</div>
<div dir="auto"> </div>
<div dir="auto">François</div>
</div>
<br />
<div class="gmail_quote">
<div dir="ltr">Le sam. 24 nov. 2018 à 14:59, Joseph Eisenberg <<a href="mailto:joseph.eisenberg@gmail.com">joseph.eisenberg@gmail.com</a>> a écrit :</div>
<blockquote class="gmail_quote" style="margin: 0 0 0 .8ex; border-left: 1px #ccc solid; padding-left: 1ex;">I'd been thinking about this lately while working on towers and radio telescopes. <br /> <br /> Towers can be tagged with tower:construction =dish and this is rendered as "satellite" dish sending or receiving waves, in the Openstreetmap-Carto style.<br /> <br /> Radio telescopes are now rendered as well.<br /> <br /> But there are some satellite uplink dishes mistagged as radio telescopes.<br /> <br /> Other tags in use are man_made=communications_dish and man_made=satellite_dish<br /> <br /> But neither is very well documented, I recall.<br /> <br /> I'd be happy to have a better way to tag these dishes.<br />
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<div dir="ltr">On Sat, Nov 24, 2018 at 9:52 PM Paul Allen <<a href="mailto:pla16021@gmail.com">pla16021@gmail.com</a>> wrote:</div>
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<div dir="ltr">On Sat, Nov 24, 2018 at 1:48 AM Warin <<a href="mailto:61sundowner@gmail.com">61sundowner@gmail.com</a>> wrote:<br />
<div class="gmail_quote">
<blockquote class="gmail_quote" style="margin: 0 0 0 .8ex; border-left: 1px #ccc solid; padding-left: 1ex;">
<div><tt>I was looking at the wiki for antennas <br /> </tt>
<p><tt><a class="m_2647859477415917583m_8049995135698053975m_2753421535601187779m_2915167882879263758moz-txt-link-freetext" href="https://wiki.openstreetmap.org/wiki/Tag:man_made%3Dantenna" target="_blank" rel="noopener noreferrer">https://wiki.openstreetmap.org/wiki/Tag:man_made%3Dantenna</a></tt></p>
<p><tt><br /> </tt></p>
<p><tt>I made some additions to the definition and added some photos etc. <br /> </tt></p>
<p><tt>It is still rather sparse. I'd like to be able to further define what the antenna is.</tt></p>
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<div>I have some pictures of various antennas in my area. Well, they're pictures of masts but the</div>
<div>antennas are sometimes discernible. Any idea for a good place to dump them so they can</div>
<div>contribute to antenna/mast examples that people can add to wiki pages as appropriate?</div>
<div> </div>
<div>Worst case, you want me to mail them to you and you can decide what to do with them?</div>
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<div>-- </div>
<div>Paul</div>
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