maki/openairinterface5g
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Merge remote-tracking branch 'origin/release-v2.0.0' into integration_2023_w31

Browse Source
This commit is contained in:
Robert Schmidt
2023-08-08 12:27:06 +02:00
parent bfc45da95b bea88a707f
commit eb20d93245
3 changed files with 394 additions and 338 deletions
Download Patch File Download Diff File Expand all files Collapse all files
CHANGELOG.md
+29
View File
@@ -1,5 +1,34 @@
# RELEASE NOTES: #
## [v2.0.0](https://gitlab.eurecom.fr/oai/openairinterface5g/-/tags/v2.0.0) -> August 2023. ##
This release adds support for 5G and maintains previous features:
* 5G SA in gNB
- PHY, MAC, RLC, PDCP, SDAP, RRC layers
- 2x2 MIMO and 256-QAM for UL/DL
- 15 and 30 kHz subcarrier spacings; 10-100 MHz bandwidths
- Up to 800Mbps throughput or 5ms latency
- F1, basic E1, 5G FAPI (SCF 222.10.02), split 8 split options
- Handling of up to 16 UEs
- RRC procedures for connection setup, multiple PDU sessions, reestablishment
* 5G SA in UE
- PHY, MAC, RLC, PDCP, SDAP, RRC layers
- 2x2 MIMO and 256-QAM for UL/DL
- 15 and 30 kHz subcarrier spacings; 10-100 MHz bandwidths
- Custom FAPI-like MAC/PHY interface
- RRC procedures for connection setup and cell measurement
* Basic 5G NSA in gNB
- X2 sgNB Addition Request between OAI eNB and gNB
* 4G eNB and UE
- Bugfixes in fairRR scheduler (eNB)
- Non-standard F1 midhaul removed (eNB)
- FlexRAN removed (eNB)
- Sync fixes (UE)
* LTE-M supported
* Support for AW2S devices, RFsimulator channel emulation support
For more information on supported features, please refer to the [feature set](doc/FEATURE_SET.md).
## [v1.2.1](https://gitlab.eurecom.fr/oai/openairinterface5g/-/tags/v1.2.1) -> February 2020. ##
* Bug fix for mutex lock for wake-up signal
README.md
+4
View File
@@ -12,6 +12,10 @@
<a href="https://getfedora.org/en/workstation/"><img src="https://img.shields.io/badge/OS-Fedore37-Green" alt="Supported OS Fedora 37"></a>
</p>
<p align="center">
<a href="https://gitlab.eurecom.fr/oai/openairinterface5g/-/releases"><img alt="GitLab Release (custom instance)" src="https://img.shields.io/gitlab/v/release/oai/openairinterface5g?gitlab_url=https%3A%2F%2Fgitlab.eurecom.fr&include_prereleases&sort=semver"></a>
</p>
<p align="center">
<a href="https://jenkins-oai.eurecom.fr/job/RAN-Container-Parent/"><img src="https://img.shields.io/jenkins/build?jobUrl=https%3A%2F%2Fjenkins-oai.eurecom.fr%2Fjob%2FRAN-Container-Parent%2F&label=build%20Images"></a>
</p>
doc/FEATURE_SET.md
+361 -338
View File
@@ -18,6 +18,351 @@
![Block Diagram](./oai_enb_block_diagram.png)
# OpenAirInterface 5G-NR Feature Set #
## General Parameters
The following features are valid for the gNB and the 5G-NR UE.
* Static TDD, FDD
* Normal CP
* Subcarrier spacings: 15 and 30kHz (FR1), 120kHz (FR2)
* Bandwidths: 10, 20, 40, 60, 80, 100MHz
* Intermediate downlink and uplink frequencies to interface with IF equipment
* Procedures for 2-layer DL and UL MIMO
* Slot format: 14 OFDM symbols in UL or DL
* Highly efficient 3GPP compliant LDPC encoder and decoder (BG1 and BG2 supported)
* Highly efficient 3GPP compliant polar encoder and decoder
* Encoder and decoder for short blocks
* Support for UL transform precoding (SC-FDMA)
Furthermore, the gNB and UE support
* "noS1" mode (DL and UL):
- Creates TUN interface to PDCP to inject and receive user-place traffic
- No connection to the core network
* Standalone (SA) mode:
- UE can register with the 5G Core Network through the gNB, establish a PDU Session and exchange user-plane traffic
## gNB PHY
* 15kHz and 30kHz SCS for FR1 and 120kHz SCS for FR2
* Generation of NR-PSS/NR-SSS
* NR-PBCH supports multiple SSBs and flexible periodicity
* Generation of NR-PDCCH (including generation of DCI, polar encoding, scrambling, modulation, RB mapping, etc)
- common search space
- user-specific search space
- DCI formats: 00, 10, 01 and 11
* Generation of NR-PDSCH (including Segmentation, LDPC encoding, rate matching, scrambling, modulation, RB mapping, etc).
- PDSCH mapping type A and B
- DMRS configuration type 1 and 2
- Single and multiple DMRS symbols
- PTRS support
- Support for 1, 2 and 4 TX antennas
- Support for up to 2 layers (currently limited to DMRS configuration type 2)
- Support for 256 QAM
* NR-CSIRS Generation of sequence at PHY
* NR-PUSCH (including Segmentation, LDPC encoding, rate matching, scrambling, modulation, RB mapping, etc).
- PUSCH mapping type A and B
- DMRS configuration type 1 and 2
- Single and multiple DMRS symbols
- PTRS support
- Support for up to 2 RX antenna
- Support for up to 2 layers
- Support for 256 QAM
* NR-PUCCH
- Format 0 (2 bits, for ACK/NACK and SR)
- Format 2 (mainly for CSI feedback)
* NR-SRS
- SRS signal reception
- Channel estimation (with T tracer real time monitoring)
- Power noise estimation
* NR-PRS
- Rel16 Positioning reference signal(PRS) generation and modulation
- Multiple PRS resources, one per beam is supported in FR2 TDD mode
- FR1 and FR2 support with config file
* NR-PRACH
- Formats 0,1,2,3, A1-A3, B1-B3
* Highly efficient 3GPP compliant LDPC encoder and decoder (BG1 and BG2 are supported)
* Highly efficient 3GPP compliant polar encoder and decoder
* Encoder and decoder for short block
## gNB MAC
- MAC -> PHY configuration using NR FAPI P5 interface
- MAC <-> PHY data interface using FAPI P7 interface for BCH PDU, DCI PDU, PDSCH PDU
- Scheduler procedures for SIB1
- Scheduler procedures for RA
- Contention Free RA procedure
- Contention Based RA procedure
- Msg3 can transfer uplink CCCH, DTCH or DCCH messages
- CBRA can be performed using MAC CE or C-RNTI
- Scheduler procedures for CSI-RS
- MAC downlink scheduler
- phy-test scheduler (fixed allocation and usable also without UE)
- regular scheduler with dynamic proportionally-fair allocation
- MCS adaptation from HARQ BLER
- MAC header generation (including timing advance)
- ACK / NACK handling and HARQ procedures for downlink
- MAC uplink scheduler
- phy-test scheduler (fixed allocation)
- regular scheduler with dynamic proportionally-fair allocation
- HARQ procedures for uplink
- Scheduler procedures for SRS reception
- Periodic SRS reception
- Channel rank computation up to 2x2 scenario
- TPMI computation based on SRS up 4 antenna ports and 2 layers
- MAC procedures to handle CSI measurement report
- evalution of RSRP report
- evaluation of CQI report
- MAC scheduling of SR reception
- Bandwidth part (BWP) operation
- Handle multiple dedicated BWPs, supports one UE
- BWP switching through RRCReconfiguration method
## gNB RLC
- Send/Receive operations according to 38.322 Rel.16
- Segmentation and reassembly procedures
- RLC Acknowledged mode supporting PDU retransmissions
- RLC Unacknowledged mode
- DRBs and SRBs establishment/handling and association with RLC entities
- Timers implementation
- Interfaces with PDCP, MAC
- Interfaces with gtp-u (data Tx/Rx over F1-U at the DU)
## gNB PDCP
- Send/Receive operations according to 38.323 Rel.16
- Integrity protection and ciphering procedures
- Sequence number management, SDU dicard and in-order delivery
- Radio bearer establishment/handling and association with PDCP entities
- Interfaces with RRC, RLC
- Interfaces with gtp-u (data Tx/Rx over N3 and F1-U interfaces)
## gNB SDAP
- Send/Receive operations according to 37.324 Rel.15
- Establishment/Handling of SDAP entities.
- Transfer of User Plane Data
- Mapping between a QoS flow and a DRB for both DL and UL
- Marking QoS flow ID in both DL and UL packets
- Reflective QoS flow to DRB mapping for UL SDAP data PDUs
## gNB RRC
- NR RRC (38.331) Rel 17 messages using new [asn1c](https://github.com/mouse07410/asn1c)
- LTE RRC (36.331) also updated to Rel 15
- Generation of CellGroupConfig (for eNB) and MIB
- Generation of system information block 1 (SIB1)
- Generation of system information block 2 (SIB2)
- Application to read configuration file and program gNB RRC
- RRC can configure PDCP, RLC, MAC
- Interface with GTP-U (tunnel creation/handling for S1-U (NSA), N3 (SA) interfaces)
- Integration of RRC messages and procedures supporting UE 5G SA connection
- RRCSetupRequest/RRCSetup/RRCSetupComplete
- RRC Uplink/Downlink Information transfer carrying NAS messages transparently
- RRC Reconfiguration/Reconfiguration complete
- RRC Reestablishment/Reestablishment complete
- Support for master cell group configuration
- Interface with NGAP for the interactions with the AMF
- Interface with F1AP for CU/DU split deployment option
- Periodic RRC measurements of serving cell (no A/B events)
## gNB X2AP
- Integration of X2AP messages and procedures for the exchanges with the eNB over X2 interface supporting the NSA setup according to 36.423 Rel. 15
- X2 setup with eNB
- Handling of SgNB Addition Request/Addition Request Acknowledge/Reconfiguration Complete
## gNB NGAP
- Integration of NGAP messages and procedures for the exchanges with the AMF over N2 interface according to 38.413 Rel. 15
- NGAP Setup request/response
- NGAP Initial UE message
- NGAP Initial context setup request/response
- NGAP Downlink/Uplink NAS transfer
- NGAP UE context release request/complete
- NGAP UE radio capability info indication
- NGAP PDU session resource setup request/response
- Interface with RRC
## gNB F1AP
- Integration of F1AP messages and procedures for the control plane exchanges between the CU and DU entities according to 38.473 Rel. 16
- F1 Setup request/response
- F1 DL/UL RRC message transfer
- F1 Initial UL RRC message transfer
- F1 UE Context setup request/response
- F1 UE Context modification request/response
- F1 UE Context release
- F1 gNB CU configuration update
- Interface with RRC
- Interface with gtp-u (tunnel creation/handling for F1-U interface)
## gNB E1AP
- Integration of E1AP messages and procedures for exchange between CU-CP and CU-UP according to 38.463 Rel. 16
- gNB-CU-UP E1 Setup Setup request/response
- E1 Bearer Context Setup
- Bearer Context Modification (gNB-CU-CP initiated)
- Interface with RRC and PDCP
## gNB GTP-U
- New GTP-U implementation supporting both N3 and F1-U interfaces according to 29.281 Rel.15
- Interfaces with RRC, F1AP for tunnel creation
- Interfaces with PDCP and RLC for data send/receive at the CU and DU respectively (F1-U interface)
- Interface with SDAP for data send/receive, capture of GTP-U Optional Header, GTP-U Extension Header and PDU Session Container.
# OpenAirInterface 5G-NR UE Feature Set #
## NR UE PHY Layer ##
* Initial synchronization
- the UE needs to know the position in frequency of the SSBs (via command line parameter in SA)
* Time tracking based on PBCH DMRS
* Frequency offset estimation based on PSS and SSS
* 15kHz and 30kHz SCS for FR1 and 120 kHz SCS for FR2
* Reception of NR-PSS/NR-SSS
* NR-PBCH supports multiple SSBs and flexible periodicity
- RSRP measurement for the strongest SSB
* Reception of NR-PDCCH (including reception of DCI, polar decoding, de-scrambling, de-modulation, RB de-mapping, etc)
- common search space configured by MIB
- user-specific search space configured by RRC
- DCI formats: 00, 10, 01 and 11
* Reception of NR-PDSCH (including Segmentation, LDPC decoding, rate de-matching, de-scrambling, de-modulation, RB de-mapping, etc).
- PDSCH mapping type A and B
- DMRS configuration type 1 and 2
- Single and multiple DMRS symbols
- PTRS support
- Support for 256 QAM
- Support for 1, 2 and 4 RX antennas
- Support for up to 2 layers (currently limited to DMRS configuration type 2)
* Measurements based on NR-CSIRS
- RSRP measurements
- RI, PMI and CQI computation
- Support for up to 4 RX antennas
- Support for up to 2 layers
* NR-PUSCH (including Segmentation, LDPC encoding, rate matching, scrambling, modulation, RB mapping, etc).
- PUSCH mapping type A and B
- DMRS configuration type 1 and 2
- Single and multiple DMRS symbols
- PTRS support
- Support for 256 QAM
- Support for up to 2 TX antenna
- Support for up to 2 layers
* NR-PUCCH
- Format 0 (2 bits for ACK/NACK and SR)
- Format 2 (mainly for CSI feedback)
- Format 1 (limited testing)
- Format 3 and 4 present but old code never tested (need restructuring before verification)
* NR-SRS
- Generation of sequence at PHY
- SRS signal transmission
* NR-PRS
- PRS based Channel estimation with T tracer dumps
- Time of arrival(ToA) estimation based on channel impulse response(CIR)
- Finer ToA estimation by 16x oversampled IDFT for CIR
- Support for multiple gNB reception with gNBs synced via GPSDO
* NR-PRACH
- Formats 0,1,2,3, A1-A3, B1-B3
* Highly efficient 3GPP compliant LDPC encoder and decoder (BG1 and BG2 are supported)
* Highly efficient 3GPP compliant polar encoder and decoder
* Encoder and decoder for short block
## NR UE FAPI ##
* MAC -> PHY configuration via UE FAPI P5 interface
* Basic MAC to control PHY via UE FAPI P7 interface
* PHY -> MAC indication (needs some improvement)
## NR UE Higher Layers ##
## UE MAC
* Minimum system information (MSI)
- MIB processing
- Scheduling of system information block 1 (SIB1) reception
* Random access procedure (needs improvement, there is still not a clear separation between MAC and PHY)
- Mapping SSBs to multiple ROs
- Scheduling of PRACH
- Processing of RAR
- Transmission and re-transmission of Msg3
- Msg4 and contention resolution
* DCI processing
- format 10 (RA-RNTI, C-RNTI, SI-RNTI, TC-RNTI)
- format 00 (C-RNTI, TC-RNTI)
- format 11 (C-RNTI)
- format 01 (C-RNTI)
* UCI processing
- ACK/NACK processing
- Triggering periodic SR
- CSI measurement reporting
* DLSCH scheduler
- Configuration of fapi PDU according to DCI
- HARQ procedures
* ULSCH scheduler
- Configuration of fapi PDU according to DCI
* NR-CSIRS scheduler
- Scheduling of NR-CSIRS reception
- Fill UCI for CSI measurement reporting
* Scheduler procedures for SRS transmission
- Periodic SRS transmission
* Bandwidth part (BWP) operation
- Operation in configured dedicated BWP through RRCSetup or RRCReconfiguration
## UE RLC
* Tx/Rx operations according to 38.322 Rel.16
- Segmentation and reassembly procedures
- RLC Acknowledged mode supporting PDU retransmissions
- RLC Unacknowledged mode
- DRBs and SRBs establishment and handling
- Timers implementation
- Interfaces with PDCP, MAC
## UE PDCP
* Tx/Rx operations according to 38.323 Rel.16
- Integrity protection and ciphering procedures
- Sequence number management, SDU dicard and in-order delivery
- Radio bearer establishment/handling and association with PDCP entities
- Interfaces with RRC, RLC
## UE SDAP
* Tx/Rx operations operations according to 37.324 Rel.15
- Establishment/Handling of SDAP entities.
- Transfer of User Plane Data
- Reflective Mapping
- RRC Signaling Mapping
## UE RRC
* Integration of RRC messages and procedures supporting UE 5G SA connection according to 38.331 Rel.16
- RRCSetupRequest/RRCSetup/RRCSetupComplete
- RRC Uplink/Downlink Information transfer carrying NAS messages transparently
- RRC Reconfiguration/Reconfiguration complete
- Support for master cell group configuration
- Reception of UECapabilityEnquiry, encoding and transmission of UECapability
* Interface with PDCP: configuration, DCCH and CCCH message handling
* Interface with RLC and MAC for configuration
## UE NAS
* Transfer of NAS messages between the AMF and the UE supporting the UE registration with the core network and the PDU session establishment according to 24.501 Rel.16
- Identity Request/Response
- Authentication Request/Response
- Security Mode Command/Complete
- Registration Request/Accept/Complete
- PDU Session Establishment Request/Accept
- NAS configuration and basic interfacing with RRC
# OpenAirInterface 4G LTE eNB Feature Set #
## eNB PHY Layer ##
@@ -45,15 +390,15 @@ The Physical layer implements **3GPP 36.211**, **36.212**, **36.213** and provid
FDD DL: 5 MHz, 25 PRBS/ MCS 28 | 16 - 17 Mbit/s | TM1: 17.0 Mbits/s | COTS-UE Cat 4 (150/50 Mbps)
FDD DL: 10 MHz, 50 PRBS/ MCS 28 | 34 - 35 Mbit/s | TM1: 34.0 Mbits/s | COTS-UE Cat 4 (150/50 Mbps)
FDD DL: 20 MHz, 100 PRBS/ MCS 28 | 70 Mbit/s | TM1: 69.9 Mbits/s | COTS-UE Cat 4 (150/50 Mbps)
| | |
| | |
FDD UL: 5 MHz, 25 PRBS/ MCS 20 | 9 Mbit/s | TM1: 8.28 Mbits/s | COTS-UE Cat 4 (150/50 Mbps)
FDD UL: 10 MHz, 50 PRBS/ MCS 20 | 17 Mbit/s | TM1: 18.3 Mbits/s | COTS-UE Cat 4 (150/50 Mbps)
FDD UL: 20 MHz, 100 PRBS/ MCS 20 | 35 Mbit/s | TM1: 18.6 Mbits/s | COTS-UE Cat 4 (150/50 Mbps)
| |
| |
TDD DL: 5 MHz, 25 PRBS/ MCS **XX** | 6.5 Mbit/s | TM1: 6.71 Mbits/s | COTS-UE Cat 4 (150/50 Mbps)
TDD DL: 10 MHz, 50 PRBS/ MCS **XX** | 13.5 Mbit/s | TM1: 13.6 Mbits/s | COTS-UE Cat 4 (150/50 Mbps)
TDD DL: 20 MHz, 100 PRBS/ MCS **XX** | 28.0 Mbit/s | TM1: 27.2 Mbits/s | COTS-UE Cat 4 (150/50 Mbps)
| | |
| | |
TDD UL: 5 MHz, 25 PRBS/ MCS **XX** | 2.0 Mbit/s | TM1: 3.31 Mbits/s | COTS-UE Cat 4 (150/50 Mbps)
TDD UL: 10 MHz, 50 PRBS/ MCS **XX** | 2.0 Mbit/s | TM1: 7.25 Mbits/s | COTS-UE Cat 4 (150/50 Mbps)
TDD UL: 20 MHz, 100 PRBS/ MCS **XX** | 3.0 Mbit/s | TM1: 4.21 Mbits/s | COTS-UE Cat 4 (150/50 Mbps)
@@ -66,7 +411,7 @@ TDD UL: 20 MHz, 100 PRBS/ MCS **XX** | 3.0 Mbit/s | TM1: 4.21 Mbits/s
## eNB MAC Layer ##
The MAC layer implements a subset of the **3GPP 36.321** release v8.6 in support of BCH, DLSCH, RACH, and ULSCH channels.
The MAC layer implements a subset of the **3GPP 36.321** release v8.6 in support of BCH, DLSCH, RACH, and ULSCH channels.
- RRC interface for CCCH, DCCH, and DTCH
- Proportional fair scheduler (round robin scheduler soon), with the following improvements:
@@ -86,16 +431,16 @@ The MAC layer implements a subset of the **3GPP 36.321** release v8.6 in support
The RLC layer implements a full specification of the 3GPP 36.322 release v9.3.
- RLC TM (mainly used for BCCH and CCCH)
- RLC TM (mainly used for BCCH and CCCH)
* Neither segment nor concatenate RLC SDUs
* Do not include a RLC header in the RLC PDU
* Delivery of received RLC PDUs to upper layers
- RLC UM (mainly used for DTCH)
- RLC UM (mainly used for DTCH)
* Segment or concatenate RLC SDUs according to the TB size selected by MAC
* Include a RLC header in the RLC PDU
* Duplication detection
* PDU reordering and reassembly
- RLC AM, compatible with 9.3
- RLC AM, compatible with 9.3
* Segmentation, re-segmentation, concatenation, and reassembly
* Padding
* Data transfer to the user
@@ -133,9 +478,9 @@ The RRC layer is based on **3GPP 36.331** v15.6 and implements the following fun
The X2AP layer is based on **3GPP 36.423** v14.6.0 and implements the following functions:
- X2 Setup Request
- X2 Setup Response
- X2 Setup Response
- X2 Setup Failure
- Handover Request
- Handover Request
- Handover Request Acknowledge
- UE Context Release
- X2 timers (t_reloc_prep, tx2_reloc_overall)
@@ -144,16 +489,16 @@ The X2AP layer is based on **3GPP 36.423** v14.6.0 and implements the following
- EN-DC is implemented
- X2AP : Handling of SgNB Addition Request / Addition Request Acknowledge / Reconfiguration Complete
- RRC : Handling of RRC Connection Reconfiguration with 5G cell info, configuration of 5G-NR measurements
- S1AP : Handling of E-RAB Modification Indication / Confirmation
- S1AP : Handling of E-RAB Modification Indication / Confirmation
## eNB/MCE M2AP ##
The M2AP layer is based on **3GPP 36.443** v14.0.1:
- M2 Setup Request
- M2 Setup Response
- M2 Setup Response
- M2 Setup Failure
- M2 Scheduling Information
- M2 Scheduling Information Response
- M2 Scheduling Information Response
- M2 Session Start Request
- M2 Session Start Response
@@ -161,7 +506,7 @@ The M2AP layer is based on **3GPP 36.443** v14.0.1:
The M3AP layer is based on **3GPP 36.444** v14.0.1:
- M3 Setup Request
- M3 Setup Response
- M3 Setup Response
- M3 Setup Failure
- M3 Session Start Request
- M3 Session Start Response
@@ -184,11 +529,11 @@ The Physical layer implements **3GPP 36.211**, **36.212**, **36.213** and provid
- All uplink (UL) channels are supported: PRACH, PUSCH, PUCCH (format 1/1a/1b), SRS, DRS
- LTE MBMS-dedicated cell (feMBMS) procedures subset for LTE release 14 (experimental)
- LTE non-MBSFN subframe (feMBMS) Carrier Adquistion Subframe-CAS procedures (PSS/SSS/PBCH/PDSH) (experimental)
- LTE MBSFN MBSFN subframe channel (feMBMS): PMCH (CS@1.25KHz) (channel estimation for 25MHz bandwidth) (experimental)
- LTE MBSFN MBSFN subframe channel (feMBMS): PMCH (CS@1.25KHz) (channel estimation for 25MHz bandwidth) (experimental)
## LTE UE MAC Layer ##
The MAC layer implements a subset of the **3GPP 36.321** release v8.6 in support of BCH, DLSCH, RACH, and ULSCH channels.
The MAC layer implements a subset of the **3GPP 36.321** release v8.6 in support of BCH, DLSCH, RACH, and ULSCH channels.
- RRC interface for CCCH, DCCH, and DTCH
- HARQ Support
@@ -196,7 +541,7 @@ The MAC layer implements a subset of the **3GPP 36.321** release v8.6 in support
- RLC interface (AM, UM)
- UL power control
- Link adaptation
- MBMS-dedicated cell (feMBMS) RRC interface for BCCH
- MBMS-dedicated cell (feMBMS) RRC interface for BCCH
- eMBMS and MBMS-dedicated cell (feMBMS) RRC interface for MCCH, MTCH
## LTE UE RLC Layer ##
@@ -223,328 +568,6 @@ The NAS layer is based on **3GPP 24.301** and implements the following functions
- ESM default/dedicated bearer, PDN connectivity, and more
# OpenAirInterface 5G-NR Feature Set #
## General Parameters ##
The following features are valid for the gNB and the 5G-NR UE.
* Static TDD,
* FDD
* Normal CP
* Subcarrier spacings: 15 and 30kHz (FR1), 120kHz (FR2)
* Bandwidths: 10, 20, 40, 80, 100MHz (273 Physical Resource Blocks)
* Intermediate downlink and uplink frequencies to interface with IF equipment
* Procedures for 2-layer DL MIMO
* Slot format: 14 OFDM symbols in UL or DL
* Highly efficient 3GPP compliant LDPC encoder and decoder (BG1 and BG2 supported)
* Highly efficient 3GPP compliant polar encoder and decoder
* Encoder and decoder for short blocks
* Support for UL transform precoding (SC-FDMA)
## gNB PHY Layer ##
* 15kHz and 30kHz SCS for FR1 and 120kHz SCS for FR2
* Generation of NR-PSS/NR-SSS
* NR-PBCH supports multiple SSBs and flexible periodicity
* Generation of NR-PDCCH (including generation of DCI, polar encoding, scrambling, modulation, RB mapping, etc)
- common search space
- user-specific search space
- DCI formats: 00, 10, 01 and 11
* Generation of NR-PDSCH (including Segmentation, LDPC encoding, rate matching, scrambling, modulation, RB mapping, etc).
- PDSCH mapping type A and B
- DMRS configuration type 1 and 2
- Single and multiple DMRS symbols
- PTRS support
- Support for 1, 2 and 4 TX antennas
- Support for up to 2 layers (currently limited to DMRS configuration type 2)
- Support for 256 QAM
* NR-CSIRS Generation of sequence at PHY
* NR-PUSCH (including Segmentation, LDPC encoding, rate matching, scrambling, modulation, RB mapping, etc).
- PUSCH mapping type A and B
- DMRS configuration type 1 and 2
- Single and multiple DMRS symbols
- PTRS support
- Support for up to 2 RX antenna
- Support for up to 2 layers
- Support for 256 QAM
* NR-PUCCH
- Format 0 (2 bits, for ACK/NACK and SR)
- Format 2 (mainly for CSI feedback)
* NR-SRS
- SRS signal reception
- Channel estimation (with T tracer real time monitoring)
- Power noise estimation
* NR-PRS
- Rel16 Positioning reference signal(PRS) generation and modulation
- Multiple PRS resources, one per beam is supported in FR2 TDD mode
- FR1 and FR2 support with config file
* NR-PRACH
- Formats 0,1,2,3, A1-A3, B1-B3
* Highly efficient 3GPP compliant LDPC encoder and decoder (BG1 and BG2 are supported)
* Highly efficient 3GPP compliant polar encoder and decoder
* Encoder and decoder for short block
## gNB Higher Layers ##
**gNB MAC**
- MAC -> PHY configuration using NR FAPI P5 interface
- MAC <-> PHY data interface using FAPI P7 interface for BCH PDU, DCI PDU, PDSCH PDU
- Scheduler procedures for SIB1
- Scheduler procedures for RA
- Contention Free RA procedure
- Contention Based RA procedure
- Msg3 can transfer uplink CCCH, DTCH or DCCH messages
- CBRA can be performed using MAC CE or C-RNTI
- Scheduler procedures for CSI-RS
- MAC downlink scheduler
- phy-test scheduler (fixed allocation and usable also without UE)
- regular scheduler with dynamic allocation
- MCS adaptation from HARQ BLER
- MAC header generation (including timing advance)
- ACK / NACK handling and HARQ procedures for downlink
- MAC uplink scheduler
- phy-test scheduler (fixed allocation)
- regular scheduler with dynamic allocation
- HARQ procedures for uplink
- Scheduler procedures for SRS reception
- Periodic SRS reception
- Channel rank computation up to 2x2 scenario
- TPMI computation based on SRS up 4 antenna ports and 2 layers
- MAC procedures to handle CSI measurement report
- evalution of RSRP report
- evaluation of CQI report
- MAC scheduling of SR reception
- Bandwidth part (BWP) operation
- Handle multiple dedicated BWPs
- BWP switching through RRCReconfiguration method
**gNB RLC**
- Send/Receive operations according to 38.322 Rel.16
- Segmentation and reassembly procedures
- RLC Acknowledged mode supporting PDU retransmissions
- RLC Unacknowledged mode
- DRBs and SRBs establishment/handling and association with RLC entities
- Timers implementation
- Interfaces with PDCP, MAC
- Interfaces with gtp-u (data Tx/Rx over F1-U at the DU)
**gNB PDCP**
- Send/Receive operations according to 38.323 Rel.16
- Integrity protection and ciphering procedures
- Sequence number management, SDU dicard and in-order delivery
- Radio bearer establishment/handling and association with PDCP entities
- Interfaces with RRC, RLC
- Interfaces with gtp-u (data Tx/Rx over N3 and F1-U interfaces)
**gNB SDAP**
- Send/Receive operations according to 37.324 Rel.15
- Establishment/Handling of SDAP entities.
- Transfer of User Plane Data
- Mapping between a QoS flow and a DRB for both DL and UL
- Marking QoS flow ID in both DL and UL packets
- Reflective QoS flow to DRB mapping for UL SDAP data PDUs
**gNB RRC**
- NR RRC (38.331) Rel 16 messages using new asn1c
- LTE RRC (36.331) also updated to Rel 15
- Generation of CellGroupConfig (for eNB) and MIB
- Generation of system information block 1 (SIB1)
- Generation of system information block 2 (SIB2)
- Application to read configuration file and program gNB RRC
- RRC can configure PDCP, RLC, MAC
- Interface with gtp-u (tunnel creation/handling for S1-U (NSA), N3 (SA) interfaces)
- Integration of RRC messages and procedures supporting UE 5G SA connection
- RRCSetupRequest/RRCSetup/RRCSetupComplete
- RRC Uplink/Downlink Information transfer carrying NAS messages transparently
- RRC Reconfiguration/Reconfiguration complete
- RRC Reestablishment/Reestablishment complete
- Paging
- Support for master cell group configuration
- Interface with NGAP for the interactions with the AMF
- Interface with F1AP for CU/DU split deployment option
- Periodic RRC measurements of serving cell (no A/B events)
**gNB X2AP**
- Integration of X2AP messages and procedures for the exchanges with the eNB over X2 interface supporting the NSA setup according to 36.423 Rel. 15
- X2 setup with eNB
- Handling of SgNB Addition Request / Addition Request Acknowledge / Reconfiguration Complete
**gNB NGAP**
- Integration of NGAP messages and procedures for the exchanges with the AMF over N2 interface according to 38.413 Rel. 15
- NGAP Setup request/response
- NGAP Initial UE message
- NGAP Initial context setup request/response
- NGAP Downlink/Uplink NAS transfer
- NGAP UE context release request/complete
- NGAP UE radio capability info indication
- NGAP PDU session resource setup request/response
- Interface with RRC
**gNB F1AP**
- Integration of F1AP messages and procedures for the control plane exchanges between the CU and DU entities according to 38.473 Rel. 16
- F1 Setup request/response
- F1 DL/UL RRC message transfer
- F1 Initial UL RRC message transfer
- F1 UE Context setup request/response
- F1 gNB CU configuration update
- Interface with RRC
- Interface with gtp-u (tunnel creation/handling for F1-U interface)
**gNB GTP-U**
- New gtp-u implementation supporting both N3 and F1-U interfaces according to 29.281 Rel.15
- Interfaces with RRC, F1AP for tunnel creation
- Interfaces with PDCP and RLC for data send/receive at the CU and DU respectively (F1-U interface)
- Interface with SDAP for data send/receive, capture of GTP-U Optional Header, GTP-U Extension Header and PDU Session Container.
# OpenAirInterface 5G-NR UE Feature Set #
* Supporting "noS1" mode (DL and UL):
- Creates TUN interface to PDCP to inject and receive user-place traffic
- No connection to the core network
* Supporting Standalone (SA) mode:
- UE can register with the 5G Core Network, establish a PDU Session and exchange user-plane traffic
## NR UE PHY Layer ##
* Initial synchronization
- the UE needs to know the position in frequency of the SSBs (via command line parameter in SA)
* Time tracking based on PBCH DMRS
* Frequency offset estimation based on PSS and SSS
* 15kHz and 30kHz SCS for FR1 and 120 kHz SCS for FR2
* Reception of NR-PSS/NR-SSS
* NR-PBCH supports multiple SSBs and flexible periodicity
- RSRP measurement for the strongest SSB
* Reception of NR-PDCCH (including reception of DCI, polar decoding, de-scrambling, de-modulation, RB de-mapping, etc)
- common search space configured by MIB
- user-specific search space configured by RRC
- DCI formats: 00, 10, 01 and 11
* Reception of NR-PDSCH (including Segmentation, LDPC decoding, rate de-matching, de-scrambling, de-modulation, RB de-mapping, etc).
- PDSCH mapping type A and B
- DMRS configuration type 1 and 2
- Single and multiple DMRS symbols
- PTRS support
- Support for 1, 2 and 4 RX antennas
- Support for up to 2 layers (currently limited to DMRS configuration type 2)
* Measurements based on NR-CSIRS
- RSRP measurements
- RI, PMI and CQI computation
- Support for up to 4 RX antennas
- Support for up to 2 layers
* NR-PUSCH (including Segmentation, LDPC encoding, rate matching, scrambling, modulation, RB mapping, etc).
- PUSCH mapping type A and B
- DMRS configuration type 1 and 2
- Single and multiple DMRS symbols
- PTRS support
- Support for up to 2 TX antenna
- Support for up to 2 layers
* NR-PUCCH
- Format 0 (2 bits for ACK/NACK and SR)
- Format 2 (mainly for CSI feedback)
- Format 1 (limited testing)
- Format 3 and 4 present but old code never tested (need restructuring before verification)
* NR-SRS
- Generation of sequence at PHY
- SRS signal transmission
* NR-PRS
- PRS based Channel estimation with T tracer dumps
- Time of arrival(ToA) estimation based on channel impulse response(CIR)
- Finer ToA estimation by 16x oversampled IDFT for CIR
- Support for multiple gNB reception with gNBs synced via GPSDO
* NR-PRACH
- Formats 0,1,2,3, A1-A3, B1-B3
* Highly efficient 3GPP compliant LDPC encoder and decoder (BG1 and BG2 are supported)
* Highly efficient 3GPP compliant polar encoder and decoder
* Encoder and decoder for short block
## NR UE FAPI ##
* MAC -> PHY configuration via UE FAPI P5 interface
* Basic MAC to control PHY via UE FAPI P7 interface
* PHY -> MAC indication (needs some improvement)
## NR UE Higher Layers ##
**UE MAC**
* Minimum system information (MSI)
- MIB processing
- Scheduling of system information block 1 (SIB1) reception
* Random access procedure (needs improvement, there is still not a clear separation between MAC and PHY)
- Mapping SSBs to multiple ROs
- Scheduling of PRACH
- Processing of RAR
- Transmission and re-transmission of Msg3
- Msg4 and contention resolution
* DCI processing
- format 10 (RA-RNTI, C-RNTI, SI-RNTI, TC-RNTI)
- format 00 (C-RNTI, TC-RNTI)
- format 11 (C-RNTI)
- format 01 (C-RNTI)
* UCI processing
- ACK/NACK processing
- Triggering periodic SR
- CSI measurement reporting
* DLSCH scheduler
- Configuration of fapi PDU according to DCI
- HARQ procedures
* ULSCH scheduler
- Configuration of fapi PDU according to DCI
* NR-CSIRS scheduler
- Scheduling of NR-CSIRS reception
- Fill UCI for CSI measurement reporting
* Scheduler procedures for SRS transmission
- Periodic SRS transmission
* Bandwidth part (BWP) operation
- Operation in configured dedicated BWP through RRCSetup or RRCReconfiguration
**UE RLC**
* Tx/Rx operations according to 38.322 Rel.16
- Segmentation and reassembly procedures
- RLC Acknowledged mode supporting PDU retransmissions
- RLC Unacknowledged mode
- DRBs and SRBs establishment and handling
- Timers implementation
- Interfaces with PDCP, MAC
**UE PDCP**
* Tx/Rx operations according to 38.323 Rel.16
- Integrity protection and ciphering procedures
- Sequence number management, SDU dicard and in-order delivery
- Radio bearer establishment/handling and association with PDCP entities
- Interfaces with RRC, RLC
**UE SDAP**
* Tx/Rx operations operations according to 37.324 Rel.15
- Establishment/Handling of SDAP entities.
- Transfer of User Plane Data
- Reflective Mapping
- RRC Signaling Mapping
**UE RRC**
* Integration of RRC messages and procedures supporting UE 5G SA connection according to 38.331 Rel.16
- RRCSetupRequest/RRCSetup/RRCSetupComplete
- RRC Uplink/Downlink Information transfer carrying NAS messages transparently
- RRC Reconfiguration/Reconfiguration complete
- Support for master cell group configuration
- Reception of UECapabilityEnquiry, encoding and transmission of UECapability
* Interface with PDCP: configuration, DCCH and CCCH message handling
* Interface with RLC and MAC for configuration
**UE NAS**
* Transfer of NAS messages between the AMF and the UE supporting the UE registration with the core network and the PDU session establishment according to 24.501 Rel.16
- Identity Request/Response
- Authentication Request/Response
- Security Mode Command/Complete
- Registration Request/Accept/Complete
- PDU Session Establishment Request/Accept
- NAS configuration and basic interfacing with RRC
[OAI wiki home](https://gitlab.eurecom.fr/oai/openairinterface5g/wikis/home)
[OAI softmodem build procedure](BUILD.md)