osmo-bsc - OsmoBSC: Osmocom's Base Station Controller for 2G circuit-switched mobile networks

Age	Commit message (Collapse)	Author	Files	Lines
2017-12-01	HO: MNCC interface uses lchan_mode and lchan_type to modify channel	Andreas Eversberg	1	-2/+68
	The MNCC application must provide the lchan_type with the lchan_mode, since FR and HR codec depends on given lchan_type. In case of AMR, the lchan_type is ignored and an available channel type is selected. In case of EFR, the given lchan_type (must be full rate) is used.
2017-12-01	HO: Remove all TCH rates from bearer capability that are not available	Andreas Eversberg	1	-0/+11
	When the MNCC application negotiates the codec, it must be sure that the TCH rates of the neotiation results can be assigned to the MS. Therefore not only the codecs that are unsupported by BTS are removed, but also the codecs that require channels that are not available.
2017-12-01	HO: Store bearer capabilities of MS at connection structure for later use	Andreas Eversberg	1	-0/+10
	Handover might require change in codec, especially when switching between AFS (AMR on TCH/F) and AHS (AMR on TCH/H). In this case the handover decision must know if a different target rate is supported by the MS or not.
2017-12-01	Fix: Handle CM service request on already secured channel correctly	Andreas Eversberg	1	-0/+5
	A CM service request must be acknowledged also, when encryption is already enabled. Without encryption enabled, the security status is GSM_SECURITY_NOTAVAIL, which causes a CM service acknowledge. On initial CM service request, the security status is GSM_SECURITY_SUCCEED, if encryption is enabled. This will not lead to an acknowledge, because the cyphering command implies an acknowlege. An additional CM service request requires an acknowledge, so I added a new security status: GSM_SECURITY_ALREADY
2017-12-01	Allow handling of TCH/F and TCH/H frames from layer 4	Andreas Eversberg	1	-2/+3

2017-12-01	osmo-nitb support for codec negotiation	Andreas Eversberg	1	-1/+14
	Since codec negotiation is done automatically, there is no need to define codec for TCH/F and TCH/H via VTY anymore.
2017-12-01	Fix: If half rate channel is used, indicate hr when modifying channel mode	Andreas Eversberg	1	-1/+2

2017-12-01	Add check for non existing lchan at tch_frame_down()	Andreas Eversberg	1	-0/+4
	Traffic cannot sent to BTS, if there is (currently) no logical channel associated with the transaction.
2017-12-01	Each BTS can be configured for speech support (other than GSM full rate)	Andreas Eversberg	1	-0/+28
	Speech codings which are not supported by BTS will be removed from the bearer capability information element after parsing. This way it is not required for the MNCC application to consider support of each BTS. Only GSM full rate is supported by default.
2017-12-01	Finished support for all codecs (RTP bridge and MNCC interface)	Andreas Eversberg	1	-1/+2
	The codes is not yet tested. AMR rate is currently fixed to 5.9k.
2017-12-01	Allow dynamic RTP payload types between application and MNCC interface	Andreas Eversberg	1	-0/+2
	Since EFR/AMR/HR codecs use dynamic RTP payload, the payload type can be set. If it is set, the frame type must be set also, so OpenBSC knows what frame types are received via RTP. This modification only affects traffic beween application and MNCC interface, not the RTP traffic between OpenBSC and BTS.
2017-12-01	Adding traffic forwarding via RTP to remote application	Andreas Eversberg	1	-36/+139
	Instead of forwarding traffic through MNCC interface, traffic can now be forwarded to a given RTP destination. A special MNCC message is used for that. The traffic can still be forwarded through MNCC interface when this special MNCC message is not used. It also works with E1 based BTSs. In conjunction with LCR's "rtp-bridge" feature, the RTP traffic can be directly exchanged with a remote SIP endpoint, so that the traffic is not forwarded by LCR itself. This way the performance of handling traffic only depends on OpenBSC and the remote SIP endpoint. Also the traffic is exchanged with the SIP endpoint without transcoding, to have maximum performance.
2017-12-01	DROP openbsc PATH ELEMENT FOR MERGING	Neels Hofmeyr	1	-0/+3283
	Change-Id: I8f6dd67b53c1ecff88e17baa4f7417a68466990f