OsmoMSC: Newshttps://projects.osmocom.org/https://projects.osmocom.org/favicon.ico?16647414092019-05-01T07:29:00ZOpen Source Mobile Communications
Redmine Handover support merged to OsmoMSC masterhttps://projects.osmocom.org/news/1072019-05-01T07:29:00Zneelsnhofmeyr@sysmocom.de
<p>We are happy to announce that OsmoMSC handover support for 2G has been merged to the master branch yesterday.<br />See this talk: <a class="external" href="https://media.ccc.de/v/osmodevcon2019-103-inter-msc-handover-how-it-works-and-how-we-implement-it">https://media.ccc.de/v/osmodevcon2019-103-inter-msc-handover-how-it-works-and-how-we-implement-it</a><br />and sensational images of the new code launched to the OsmoMSC master orbit: <a class="external" href="http://people.osmocom.org/neels/oeZeich5/msc_launch.jpg">http://people.osmocom.org/neels/oeZeich5/msc_launch.jpg</a> ;)</p>
<p>OsmoMSC master can now do both inter-BSC as well as inter-MSC handover for 2G (GERAN).<br />Until now, only OsmoBSC supported handover, i.e. an ongoing phone call moving to another cell within the same BSC.<br />OsmoBSC since not so long ago can also handover to another BSC, but you needed a third-party MSC for this.</p>
<p>Now, you can use our stock OsmoMSC for inter-BSC handover. Notably OsmoBSC has also received crucial fixes for handover on AoIP.<br />We also support inter-MSC handover now, i.e. you can handover a 2G call to another OsmoMSC.<br />To handover to/from a third-party MSC, a separate GSUP-to-MAP compatibility layer will have to be added.</p>
<p>A rather large refactoring effort was necessary to allow handling more than one RAN connection per subscriber.<br />Though handover to/from 3G is not yet supported, the new code base is a necessary preparation for adding that.<br />It is not yet clear when or by whom handover on 3G might be taken on, so join us if you are interested.</p>
<p>OsmoMSC v1.4.0 was released to mark a stable version <strong>before</strong> the new changes.<br />After due testing by the extended Osmocom community, we will (likely soon) tag a new "latest" release.<br />Until then, handover support is available in the nightly images and when built from current master.<br /><a class="external" href="https://osmocom.org/projects/cellular-infrastructure/wiki/Nightly_Builds">https://osmocom.org/projects/cellular-infrastructure/wiki/Nightly_Builds</a><br /><a class="external" href="https://osmocom.org/projects/cellular-infrastructure/wiki/Build_from_Source">https://osmocom.org/projects/cellular-infrastructure/wiki/Build_from_Source</a></p>