Hi, AFAIR it's possible to run osmocom-bb "mobile" (GSM) and "modem" (GPRS) apps against that osmo-trx-ms with a B210/BladeRF underneath as an SDR. It is related to work done with this grant: https://www.ardc.net/apply/grants/2021-grants/grant-paving-the-way-to-use-gs... https://osmocom.org/projects/cellular-infrastructure/wiki/GSM_in_70cm_HAM_ba... Regarding GPRS, I was involved at the time with implementing the upper GPRS layers (RLC/MAC, LLC, etc.), which can be found in both osmocom-bb and libosmo-gprs git repositories. IIRC only minimal support (1 TS TBF GPRS) is currently implemented, but it can already be used to tx/rx data over it with the "modem" osmocom-bb app. You can find the GPRS architecture here: https://osmocom.org/projects/baseband/wiki/MS-side_GPRS I'm not able to find more public information rather than: https://osmocom.org/search?utf8=%E2%9C%93&scope=&q=MS-SDR Regards, -- - Pau Espin Pedrol <pespin@sysmocom.de> http://www.sysmocom.de/ ======================================================================= * sysmocom - systems for mobile communications GmbH * Siemensstr. 26a * 10551 Berlin, Germany * Sitz / Registered office: Berlin, HRB 134158 B * Geschaeftsfuehrer / Managing Director: Harald Welte

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