From ad09615acbc9ca3e6804780ff5641448067613c1 Mon Sep 17 00:00:00 2001 From: Harald Welte Date: Sun, 3 Jun 2012 11:01:31 +0200 Subject: add known limitations --- README | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) (limited to 'README') diff --git a/README b/README index e63fb0ef..99620e0e 100644 --- a/README +++ b/README @@ -21,3 +21,37 @@ require a lot of work. Some additional work is being done in using some parts of the OpenBTS L1FEC and glue it against omso-bts. However, this is also still in an early, experimental stage. + +== Known Limitations == + +As of June 3, 2012, the following known limitations exist in this +implementation: + +=== Common Core === + * No Extended BCCH support + * System Information limited to 1,2,2bis,2ter,2quater,3,4,5,6,9,13 + * No RATSCCH in AMR + * No OML (TS 12.21) alarms yet (temperature, ...) + * Only single-TRX BTS at this point + * Will reject TS 12.21 STARTING TIME in SET BTS ATTR / SET CHAN ATTR + * Makes no use of TS 12.21 RACH Busy Threshold (planned) + * CCCH Load Indication only for PCH, not for RACH (planned) + * No support for frequency hopping + * No reporting of interference levels as part of TS 08.58 RF RES IND + * No error reporting in case PAGING COMMAND fails due to queue overflow + * No hand-over support (planned) + * No use of TS 08.58 BS Power and MS Power parameters + * No support of TS 08.58 MultiRate Control + * No support of TS 08.58 Supported Codec Types + * No support of Bter frame / ENHANCED MEASUREMENT REPORT + +=== osmo-bts-sysmo === + * No CSD / ECSD support (not planned) + * No GPRS/EDGE support (planned) + * GSM-R frequency band supported, but no NCH/ASCI/SoLSA + * All timeslots on one TRX have to use same training sequence (TSC) + * No multi-TRX support yet, though hardware+L1 support stacking + * Makes no use of 12.21 Intave Parameters, Max TA and Interference + Level Boundaries + * Makes no use of TS 12.21 T3105 + * Doesn't yet include MAC address in Abis/IP Identity message -- cgit v1.2.3