Release Notes

21.04
- Rename project from srsLTE to srsRAN
- Add initial 5G NSA support to srsUE (including x86-optimized FEC and PHY layer)
- Add PDCP discard support
- Add UL power control, measurement gaps and a new proportional fair scheduler to srsENB
- Extend GTP-U tunneling to support tunnel forwarding over S1
- Optimize many data structures, remove dynamic memory allocations in data plane
- Improved S1AP error handling and enhanced event reporting
- Update ASN.1 packing/unpacking, RRC to Rel 15.11, S1AP to Rel 16.1
- Update PCAP writer to use UDP framing
- Other bug-fixes and improved stability and performance in all parts

20.10.1
- Fix eNB issue relating to uplink hybrid ARQ

20.10
- EUTRA mobility support
- Fix for QAM256 support for eNB
- New logging framework
- PHY optimizations
- Other performance and stability improvements

20.04.1
- Fix for UE MIMO segfault issue
- Fix for eNodeB SR configuration
- Clang compilation warning fixes
- Fix GPS tracking synchronization

20.04
- Carrier Aggregation and Time Alignment in srsENB
- Complete Sidelink PHY layer (all transmission modes)
- Complete NB-IoT PHY downlink signals
- New S1AP packing/unpacking library
- EVM and EPRE measurements
- Remove system timers in srsUE and srsENB
- Refactor eNB to prepare for mobility support
- Other bug-fixes and improved stability and performance in all parts

19.12
- Add 5G NR RRC and NGAP ASN1 packing/unpacking
- Add sync routines and broadcast channel for Sidelink
- Add cell search and MIB decoder for NB-IoT
- Add PDCP discard
- Improve RRC Reestablishment handling
- Improve RRC cell measurements and procedure handling
- Add multi-carrier and MIMO support to ZMQ radio
- Refactor eNB scheduler to support multiple carriers
- Apply clang-format style on entire code base
- Other bug-fixes and improved stability and performance in all parts

19.09
- Add initial support for NR in MAC/RLC/PDCP
- Add sync code for NB-IoT
- Add support for EIA3/EEA3 (i.e. ZUC)
- Add support for CSFB in srsENB
- Add adaptation layer to run TTCN-3 conformance tests for srsUE
- Add High Speed Train model to channel simulator
- Rework RRC and NAS layer and make them non-blocking
- Fixes in ZMQ, bladeRF and Soapy RF modules
- Other bug-fixes and improved stability and performance in all parts

19.06
- Add QAM256 support in srsUE
- Add QoS support in srsUE
- Add UL channel emulator
- Refactor UE and eNB architecture
- Many bug-fixes and improved stability and performance in all parts

19.03
- PHY library refactor
- TDD support for srsUE
- Carrier Aggregation support for srsUE
- Paging support for srsENB and srsEPC
- User-plane encryption for srsENB
- Channel simulator for EPA, EVA, and ETU 3GPP channels
- ZeroMQ-based fake RF driver for I/Q over IPC/network
- Many bug-fixes and improved stability and performance in all parts

18.12
- Add new RRC ASN1 message pack/unpack library
- Refactor EPC and add encryption support
- Add IPv6 support to srsUE
- Fixed compilation issue for ARM and AVX512
- Add clang-format file
- Many bug-fixes and improved stability and performance in all parts

18.09
- Improved Turbo Decoder performance
- Configurable SGi interface name and M1U params
- Support for GPTU echo mechanism
- Added UE detach capability
- Refactor RLC/PDCP classes
- Various fixes for ARM-based devices
- Added support for bladeRF 2.0 micro
- Many bug-fixes and improved stability and performance in all parts

18.06.1
- Fixed RLC reestablish
- Fixed aperiodic QCI retx
- Fixed eNB instability
- Fixed Debian packaging

18.06
- Added eMBMS support in srsUE/srsENB/srsEPC
- Added support for hard SIM cards
- Many bug-fixes and improved stability and performance in all parts

18.03.1
- Fixed compilation for NEON
- Fixed logging and RLC AM issue

18.03
- Many bug-fixes and improved stability and performance in all parts

17.12
- Added support for MIMO 2x2 in srsENB (i.e. TM3/TM4)
- Added srsEPC, a light-weight core network implementation
- Added support for X2/S1 handover in srsUE
- Added support for user-plane encryption in srsUE
- Many bug-fixes and improved stability and performance in srsUE/srsENB

17.09
- Added MIMO 2x2 in the PHY layer and srsUE (i.e. TM3/TM4)
- eMBMS support in the PHY layer
- Many bug-fixes and improved stability and performance in srsUE/srsENB

002.000.000
- Added fully functional srsENB to srsRAN code
- Merged srsUE code into srsRAN and reestructured PHY code
- Added support for SoapySDR devices (eg LimeSDR)
- Fixed issues in RLC AM
- Added support for NEON and AVX in many kernels and Viterbi decoder
- Added support for CPU affinity
- Other minor bug-fixes and new features

001.004.000
- Fixed issue in rv for format1C causing incorrect SIB1 decoding in some networks
- Improved PDCCH decoding BER (fixed incorrect trellis initialization)
- Improved PUCCH RX performance

001.003.000
- Bugfixes:
  - x300 master clock rate
  - PHICH: fixed bug causing more NACKs
  - PBCH: fixed bug in encoding function
  - channel estimation: fixed issue in time interpolation
  - DCI: Fixed bug in Format1A packing
  - DCI: Fixed bug in Format1C for RA-RNTI
  - DCI: Fixed overflow in MIMO formats
- Improvements:
  - Changed and cleaned DCI blind search API
  - Added eNodeB PHY processing functions

001.002.000
- Bugfixes:
  - Estimation of extrapolated of out-of-band carriers
  - PDCCH REG interleaving for certain cell IDs
  - MIB decoding
  - Overflow in viterbi in PBCH
- Improvements:
  - Synchronization in long multipath channels
  - Better calibration of synchronization and estimation
  - Averaging in channel estimation
  - Improved 2-port diversity decoding

001.001.000
- Added support for BladeRF