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Harald Welte c4bcd6e287 [ENB] Add CFSB support
This commit introduces CSFB (circuit switched fall-back) capabilities to
srsLTE.  Actually, all the eNB has to do is to send a
RrcConnectionRelease with the RedirectedCarrierInfo IE.

The MME triggers this by the S1AP CS Fallback Indicator IE, which may
be present either in the Initial Context Setup Requst or in the
UE Context Modification Request.

As srsLTE has no support for the UE Context Modification Request at all
yet (!), basic support for this message is introduced in this patch.

Both Mobile Originated and Mobile Terminated CSFB with a coupel of
different UE models have been verified using this patch in a setup
consisting of srsENB attached to an undisclosed EPC connected via SGsAP
to a complete  Osmocom 2G network.

Closes: #358
Closes: #363
5 years ago
..
asn1 Clang-formated liblte_* 6 years ago
common add type setter to sch_subh and use it for MCH PDUs 6 years ago
interfaces [ENB] Add CFSB support 5 years ago
phy replace remaining warning macros with pragma message 6 years ago
radio introduce layerd architecture we use for UE to eNB 6 years ago
upper Fix using deallocated PDU 6 years ago
CMakeLists.txt update copyright notice 6 years ago
build_info.h.in fix include in build_info.h template 6 years ago
config.h Removing deplicated error codes. 6 years ago
srslte.h update copyright notice 6 years ago
version.h.in update copyright notice 6 years ago