srsRAN_4G/CHANGELOG

Change Log for Releases
=======================
## 23.04
  * Introduced configurable s1 connection timer
  * Added reestablishment support during S1-Handover
  * Added basic support for NSSAI based slicing in UE & gNodeB
  * Updated the RRC to enable srsUE compatibility with new srsgnb
  * Updated eMBMS to fix various outstanding issues
  * Added basic support for RIC E2 interface
  * other bug-fixes and improved stability and performance in all parts


## 22.10
  * Fix DL NAS integrity checks in srsUE
  * Remove Travis and LGTM as CI platforms
  * Remove polarssl as optional dependency (only mbedTLS used and required for security)
  * Allow to specify multiple PLMNs in SIB1
  * Allow non-blocking S1AP connect and expose various other SCTP options
  * Add support to broadcast MAC backoff indicator
  * Seperate T300/T301 timer in srsENB
  * Fix in eMBMS payload buffer handling
  * Fix memleak in NR scheduler

## 22.04.1
  * Various bug fixes in RLC AM and PDCP for NR
  * Fix crash when UE attempted to reestablish in SA
  * Remove fixed coreset0 index for SSB
  * Add support for SIB5 and SIB6 transmission in LTE
  
## 22.04
  * Added baseline 5G-SA support to srsUE and srsENB
  * Added dynamic loading of RF libraries
  * Added RRC Redirect to srsUE
  * Added support for A5 measurement events to srsENB
  * Added Crest Factor Reduction (CFR) for srsENB downlink and srsUE uplink (4G only)
  * Raise C++ standard to C++14
  * Other bug-fixes and improved stability and performance in all parts

## 21.10
  * Add initial 5G NSA support to srsENB (tested with OnePlus 5G Nord)
  * Improved interoperability of srsUE in NSA mode
  * Added enhanced instrumentation to file using JSON format
  * Fixed stability issues with Ettus N310
  * Added BLER-adaptive MCS scheduling to srsENB
  * Other bug-fixes and improved stability and performance in all parts

## 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 bug in srsENB that effectively disabled UL HARQ

## 20.10
  * Add Mobility (Intra eNB and S1) and RRC Reestablishment to srsENB
  * Add new logging framework
  * Make UE PHY layer non-blocking
  * Replace some PHY pre-calculations with fast on-the-fly routines
  * Fix QAM256 support in srsENB
  * Add initial NR PHY layer and stack components
  * Other bug-fixes and improved stability and performance in all parts

## 20.04.2
  * Fix attach issue for some newer phones due to wrong CQI config
    in RRC Connection Reconfiguration message by turning off QAM256 support

## 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 srsLTE code
  * Merged srsUE code into srsLTE 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