mirror of
https://gitlab.eurecom.fr/oai/openairinterface5g.git
synced 2026-07-13 04:30:28 +00:00
5d309b93d1
- added Paging documentation - updated to latest NGAP, F1AP, E1AP, NAS status - fixed spelling errors Signed-off-by: Guido Casati <guido.casati@openairinterface.org>
718 lines
28 KiB
Markdown
718 lines
28 KiB
Markdown
<!-- SPDX-License-Identifier: CC-BY-4.0 -->
|
|
|
|
# Feature Set
|
|
|
|
**Table of Contents**
|
|
|
|
[[_TOC_]]
|
|
|
|
## Functional Split Architecture
|
|
|
|
- RCC: Radio-Cloud Center
|
|
- RAU: Radio-Access Unit
|
|
- RRU: Remote Radio-Unit
|
|
- IF4.5 / IF5 : similar to IEEE P1914.1
|
|
- FAPI (IF2) : specified by Small Cell Forum (open-nFAPI implementation)
|
|
- IF1 : F1 in 3GPP Release 15
|
|
|
|
|
|
|
|
|
|
## OpenAirInterface Block Diagram
|
|
|
|
|
|
|
|
## OpenAirInterface 5G-NR Feature Set
|
|
|
|
### General Parameters
|
|
|
|
The following features are valid for the gNB and the 5G-NR UE.
|
|
|
|
* Static TDD
|
|
- Multi TDD pattern supported refer [TDD Configuration](MAC/mac-usage.md)
|
|
* Static FDD
|
|
* Normal CP
|
|
* Subcarrier spacings: 15 and 30kHz (FR1), 120kHz (FR2)
|
|
* Bandwidths: 5-100MHz (FR1), 100 and 200MHz (FR2)
|
|
* Intermediate downlink and uplink frequencies to interface with IF equipment
|
|
* Procedures for 4-layer DL and 2-layer UL SU-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)
|
|
|
|
These modes of operation are supported:
|
|
|
|
* "phy-test" mode (gNB, nrUE):
|
|
- gNB and nrUE have hardcoded RNTI and radio configuration
|
|
- gNB schedules the nrUE all the time, even if no UE connected
|
|
- can be used for performance evaluation
|
|
* "noS1" mode (DL and UL, gNB, nrUE):
|
|
- Connection setup stops after RA; RRC configuration is exchanged through
|
|
files
|
|
- Creates TUN interface to SDAP to inject and receive user-place traffic
|
|
- No connection to the core network
|
|
* Standalone (SA) mode (gNB, nrUE):
|
|
- UE can register with the 5G Core Network through the gNB, establish a PDU
|
|
Session and exchange user-plane traffic
|
|
- Reestablishment supported
|
|
* Non-standalone (NSA) mode (gNB):
|
|
- UE can use the gNB for user plane traffic while connected to the 4G eNB
|
|
- is unstable (only one UE connection)
|
|
|
|
|
|
### 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 up to 4 TX antennas
|
|
- Support for up to 4 layers
|
|
- 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 4 RX antennas
|
|
- 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 DL_TTI.request,
|
|
UL_TTI.request, UL_DCI.request, TX_data.request, RX_Data.indication,
|
|
CRC.indication, UCI.indication, SRS.indication
|
|
- Generation of and scheduler procedures for MIB/SIB1
|
|
- Scheduler procedures for RA
|
|
- 4-Step 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 for C-RNTI
|
|
- Is not possible to use 2-Step RA and 4-Step RA at the same time
|
|
- 2-Step RA
|
|
- Contention Based RA procedure
|
|
- MsgA can transfer uplink CCCH, DTCH or DCCH messages
|
|
- CBRA can be performed using MAC CE for C-RNTI
|
|
- Is not possible to use 2-Step RA and 4-Step RA at the same time
|
|
- Fallback not supported
|
|
- 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 or SSB-SINR report
|
|
- 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
|
|
- MCS adaption from HARQ BLER or PUSCH SINR
|
|
- 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
|
|
- Paging (PCCH/P-RNTI)
|
|
- CN paging records queued
|
|
- PF/PO dequeue from SIB1 PCCH-Config
|
|
- PCCH encoded at the UE's PO
|
|
- Type2 common search-space based P-RNTI PDCCH + PDSCH scheduling for PCCH
|
|
- Intra-frequency handover
|
|
- Inter-frequency handover
|
|
- Measurement gaps are automatically computed at the DU if the CU has neighbor information and the configured
|
|
neighbors include cells operating on different frequencies
|
|
- DUs must be synchronized with each other for the measurements to be properly performed
|
|
- Initial support for RedCap
|
|
- RedCap SIB1 v17 IEs supported
|
|
- Coexistence of RedCap and Normal UEs
|
|
- Handling of RedCap capability for small PDCP/RLC SN size
|
|
- Scheduling of other SIBs (2, 3, 4, 19)
|
|
- NTN
|
|
- Support downlinkHARQ-FeedbackDisabled-r17
|
|
- Support for 32 PDSCH and PUSCH HARQ processes per UE
|
|
- Consider ntn-Config-r17.cellSpecificKoffset-r17 in scheduling
|
|
- Function-based interface for ntn-Config-r17 updates (used by NTN-LEO RFsimulator)
|
|
|
|
### 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 system information (SIB2, SIB3, SIB4)
|
|
- RRC can configure PDCP and SDAP (through E1), and RLC and MAC (through F1)
|
|
- Interface with GTP-U (tunnel creation/handling for S1-U (NSA), N3 (SA), F1 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 MasterCellGroup configuration (from DU)
|
|
- Interface with NGAP for the interactions with the AMF
|
|
- Interface with F1AP for CU/DU split deployment option
|
|
- Interface with E1AP for CU-CP/CU-CP split deployment option
|
|
- Periodic RRC measurements of serving/neighbour cells and A2/A3 event
|
|
handling
|
|
- RRC Mobility Management Procedures:
|
|
- Inter-DU Handover (F1-based handover within same CU)
|
|
- Inter-gNB Handover (N2-based handover between different gNBs)
|
|
- Handover Preparation Information generation and processing
|
|
- Handover Command generation and processing
|
|
- PDCP Status transfer procedures
|
|
- Support for handover decision triggers (A3 events, manual triggers)
|
|
- Initial support for RedCap (see MAC)
|
|
|
|
### 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 Paging
|
|
- NGAP UE context release request/command/complete
|
|
- NGAP UE radio capability info indication
|
|
- NGAP PDU session resource setup request/response
|
|
- NGAP PDU session resource modify request/response
|
|
- NGAP PDU session resource release command/response
|
|
- NGAP Mobility Management Procedures:
|
|
* NGAP Handover Required
|
|
* NGAP Handover Request
|
|
* NGAP Handover Request Acknowledge
|
|
* NGAP Handover Command
|
|
* NGAP Handover Notify
|
|
* NGAP Handover Cancel
|
|
* NGAP Handover Cancel Acknowledge
|
|
* NGAP Uplink RAN Status Transfer
|
|
* NGAP Downlink RAN Status Transfer
|
|
- 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 Interface Management:
|
|
* F1 Setup request/response/failure
|
|
- F1 RRC Message Transfer:
|
|
* F1 Initial UL RRC Message Transfer
|
|
* F1 DL RRC Message Transfer
|
|
* F1 UL RRC Message Transfer
|
|
- F1 UE Context Management:
|
|
* F1 UE Context setup request/response
|
|
* F1 UE Context modification request/response
|
|
* F1 UE Context modification required
|
|
* F1 UE Context release req/cmd/complete
|
|
- F1 Paging
|
|
- F1 gNB CU configuration update
|
|
- F1 gNB DU configuration update
|
|
- F1 Reset (handled at DU only, full reset only)
|
|
- F1 Mobility Management Procedures:
|
|
* F1 Intra-CU Handover (Inter-DU mobility)
|
|
- Interface with RRC
|
|
- Interface with GTP-u (tunnel creation/handling for F1-U interface)
|
|
- One CU(-CP) can handle multiple DUs
|
|
- Support for intra-CU mobility (across DUs)
|
|
|
|
### gNB E1AP
|
|
|
|
- Integration of E1AP messages and procedures for exchange between CU-CP and CU-UP according to TS 38.463 Rel. 16
|
|
- E1 Setup (gNB-CU-UP initiated)
|
|
- E1 Setup Request
|
|
- E1 Setup Response
|
|
- E1 Setup Failure
|
|
- E1 Bearer Context Setup (gNB-CU-CP initiated)
|
|
- E1 Bearer Context Setup Request
|
|
- E1 Bearer Context Setup Response
|
|
- E1 Bearer Context Setup Failure
|
|
- Bearer Context Modification (gNB-CU-CP initiated)
|
|
- E1 Bearer Context Modification Request
|
|
- E1 Bearer Context Modification Response
|
|
- E1 Bearer Context Modification Failure
|
|
- Bearer Context Release (gNB-CU-CP initiated)
|
|
- E1 Bearer Context Release Command
|
|
- E1 Bearer Context Release Complete
|
|
- Interface with RRC and PDCP/SDAP
|
|
- One CU-CP can handle multiple CU-UPs
|
|
|
|
### 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.
|
|
|
|
### Number of supported UEs
|
|
|
|
* 16 by default (as defined in `MAX_MOBILES_PER_GNB`)
|
|
* up to 64 if the configured bandwidth is sufficient (at leat 40 MHz)
|
|
|
|
## OpenAirInterface 5G-NR UE Feature Set
|
|
|
|
### NR UE PHY Layer
|
|
|
|
* Initial synchronization
|
|
- non-blind synchronization (information required: carrier frequency, bandwidth, numerology)
|
|
- option to search SSB inside the bandwidth available
|
|
* Time tracking based on PBCH DMRS
|
|
* Initial Frequency offset estimation based on PSS and SSS
|
|
* Continuous Frequency offset estimation and compensation based on PBCH DMRS
|
|
* 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
|
|
- RSRP measurement for neighboring cell at same SSB frequency with serving cell
|
|
* 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
|
|
- Downlink resource allocation type 0 and 1
|
|
- 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
|
|
- Support for UCI on PUSCH
|
|
* 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
|
|
* NTN
|
|
- TA adjustment based on ntn-Config-r17 information
|
|
- Different TA adjustment algorithms between SIB19 receptions:
|
|
- Autonomous TA adjustment based on DL time tracking
|
|
- Standard compliant epoch time based TA adjustment including orbital propagation
|
|
- DL Doppler compensation based on ntn-Config-r17 information
|
|
- UL Doppler pre-compensation based on ntn-Config-r17 information and residual DL FO estimation
|
|
* 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
|
|
|
|
### NR UE Higher Layers
|
|
|
|
### UE MAC
|
|
|
|
* Minimum system information (MSI)
|
|
- MIB processing
|
|
- Scheduling of system information block 1 (SIB1) reception
|
|
* Other system information
|
|
- Scheduling of other system information blocks reception (SIB2, SIB3, SIB4)
|
|
* Random access procedure (needs improvement, there is still not a clear separation between MAC and PHY)
|
|
- Mapping SSBs to multiple ROs
|
|
- Scheduling of PRACH
|
|
- 4-Step RA
|
|
- Processing of RAR
|
|
- Transmission and re-transmission of Msg3
|
|
- Msg4 and contention resolution
|
|
- 2-Step RA
|
|
- Transmission of MsgA-PUSCH
|
|
- Reception of MsgB
|
|
- Processing of SuccessRAR
|
|
- Fallback not supported
|
|
* DCI processing
|
|
- format 10 (RA-RNTI, C-RNTI, SI-RNTI, TC-RNTI)
|
|
- format 10 with P-RNTI
|
|
- format 00 (C-RNTI, TC-RNTI)
|
|
- format 11 (C-RNTI)
|
|
- format 01 (C-RNTI)
|
|
* Paging monitoring and reception
|
|
- PF/PO-based paging PDCCH monitoring in IDLE/non-connected states
|
|
* UCI processing
|
|
- ACK/NACK processing
|
|
- Scheduling request procedures
|
|
- CSI measurement reporting (periodic and aperiodic)
|
|
* DLSCH scheduler
|
|
- Configuration of fapi PDU according to DCI
|
|
- HARQ procedures
|
|
* ULSCH scheduler
|
|
- Configuration of fapi PDU according to DCI
|
|
- Buffer status reporting procedures
|
|
- Logical channel prioritization of 'data from any logical channel'
|
|
- UCI on PUSCH
|
|
* NR-CSIRS scheduler
|
|
- Scheduling of NR-CSIRS reception
|
|
- Fill UCI for CSI measurement reporting
|
|
* Scheduler procedures for SRS transmission
|
|
- Periodic and aperiodic SRS transmission
|
|
* Bandwidth part (BWP) operation
|
|
- Operation in configured dedicated BWP through RRCSetup or RRCReconfiguration
|
|
* NTN
|
|
- Support downlinkHARQ-FeedbackDisabled-r17
|
|
- Support for 32 PDSCH and PUSCH HARQ processes
|
|
- Consider ntn-Config-r17.cellSpecificKoffset-r17 in scheduling
|
|
|
|
|
|
### 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
|
|
- RRCReject
|
|
- RRCRelease/ RRC going to IDLE
|
|
- RRC Uplink/Downlink Information transfer carrying NAS messages transparently
|
|
- RRC Reconfiguration/Reconfiguration complete
|
|
- RRCSetup fallback (after reestablishment)
|
|
- RRCReestablishmentRequest/RRC Reestablishment/Reestablishment complete
|
|
- Support for master cell group configuration
|
|
- Reception of UECapabilityEnquiry, encoding and transmission of UECapability
|
|
- Support for measurement report of Event A2/A3
|
|
- Paging: PCCH reception
|
|
* NTN according to 38.331 Rel.17
|
|
- Reception of ntn-Config-r17 from SIB19 or reconfigurationWithSync
|
|
- Handling of ntn-UlSyncValidityDuration-r17 in SIB19
|
|
* Interface with PDCP: configuration, DCCH and CCCH message handling
|
|
* Interface with RLC and MAC for configuration
|
|
|
|
### UE 5G 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
|
|
* 5GMM (5G Mobility Management) messages:
|
|
- Service Request/Accept/Reject (Network-triggered Service Request TS 23.502 §4.2.3.3,
|
|
UE-Triggered Service Request after paging, TS 23.502 §4.2.3.2)
|
|
- Identity Request/Response
|
|
- Authentication Request/Response
|
|
- Security Mode Command/Complete
|
|
- Registration Request/Accept/Complete
|
|
- Deregistration Request (UE originating)
|
|
- Uplink NAS Transport
|
|
* 5GSM (5G Session Management) messages:
|
|
- PDU Session Establishment Request/Accept
|
|
* Security Features:
|
|
- NAS message integrity protection and ciphering
|
|
- Security context establishment and management
|
|
* Integration:
|
|
- NAS configuration and interfacing with RRC
|
|
- Integration with SDAP for user plane data transfer
|
|
|
|
For detailed implementation status, encoding/decoding support, and unit test coverage, see [5G NAS Implementation Documentation](5Gnas.md).
|
|
|
|
## OpenAirInterface 4G LTE eNB Feature Set
|
|
|
|
### eNB PHY Layer
|
|
|
|
The Physical layer implements **3GPP 36.211**, **36.212**, **36.213** and provides the following features:
|
|
|
|
- LTE release 8.6 compliant, and implements a subset of release 10
|
|
- FDD and TDD configurations: 1 (experimental) and 3
|
|
- Bandwidth: 5, 10, and 20 MHz
|
|
- Transmission modes: 1, 2 (stable), 3, 4, 5, 6, 7 (experimental)
|
|
- Max number of antennas: 2
|
|
- CQI/PMI reporting: aperiodic, feedback mode 3 - 0 and 3 - 1
|
|
- PRACH preamble format 0
|
|
- Downlink (DL) channels are supported: PSS, SSS, PBCH, PCFICH, PHICH, PDCCH, PDSCH, PMCH, MPDCCH
|
|
- Uplink (UL) channels are supported: PRACH, PUSCH, PUCCH (format 1/1a/1b), SRS, DRS
|
|
- HARQ support (UL and DL)
|
|
- Highly optimized base band processing (including turbo decoder)
|
|
- Multi-RRU support: over the air synchro b/ multi RRU in TDD mode
|
|
- Support for CE-modeA for LTE-M. Limited support for repeatition, single-LTE-M connection, legacy-LTE UE attach is disabled.
|
|
|
|
#### Performances
|
|
|
|
**Transmission Mode, Bandwidth** | **Expected Throughput** | **Measured Throughput** | **Measurement Conditions**
|
|
-------------------------------- | ----------------------- | ------------------------| ----------------:
|
|
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)
|
|
|
|
#### Number of supported UEs
|
|
|
|
* 16 by default
|
|
* up to 256 when compiling with dedicated compile flag
|
|
* was tested with 40 COTS-UE
|
|
|
|
### 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.
|
|
|
|
- RRC interface for CCCH, DCCH, and DTCH
|
|
- Proportional fair scheduler (round robin scheduler soon), with the following improvements:
|
|
- Up to 30 users tested in the L2 simulator, CCE allocation in the preprocessor ; the scheduler was also simplified and made more modular
|
|
- Adaptative UL-HARQ
|
|
- Remove out-of-sync UEs
|
|
- No use of the `first_rb` in the UL scheduler ; respects `vrb_map_UL` and `vrb_map` in the DL
|
|
- DCI generation
|
|
- HARQ Support
|
|
- RA procedures and RNTI management
|
|
- RLC interface (AM, UM)
|
|
- UL power control
|
|
- Link adaptation
|
|
- Connected DRX (CDRX) support for FDD LTE UE. Compatible with R13 from 3GPP. Support for Cat-M1 UE comming soon.
|
|
|
|
### eNB RLC Layer
|
|
|
|
The RLC layer implements a full specification of the 3GPP 36.322 release v9.3.
|
|
|
|
- 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)
|
|
* 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
|
|
* Segmentation, re-segmentation, concatenation, and reassembly
|
|
* Padding
|
|
* Data transfer to the user
|
|
* RLC PDU retransmission in support of error control and correction
|
|
* Generation of data/control PDUs
|
|
|
|
### eNB PDCP Layer
|
|
|
|
The current PDCP layer is header compliant with **3GPP 36.323** Rel 10.1.0 and implements the following functions:
|
|
|
|
- User and control data transfer
|
|
- Sequence number management
|
|
- RB association with PDCP entity
|
|
- PDCP entity association with one or two RLC entities
|
|
- Integrity check and encryption using the AES and Snow3G algorithms
|
|
|
|
### eNB RRC Layer
|
|
|
|
The RRC layer is based on **3GPP 36.331** v15.6 and implements the following functions:
|
|
|
|
- System Information broadcast (SIB 1, 2, 3, and 13)
|
|
* SIB1: Up to 6 PLMN IDs broadcast
|
|
- RRC connection establishment
|
|
- RRC connection reconfiguration (addition and removal of radio bearers, connection release)
|
|
- RRC connection release
|
|
- RRC connection re-establishment
|
|
- Inter-frequency measurement collection and reporting (experimental)
|
|
- eMBMS for multicast and broadcast (experimental)
|
|
- Handover (experimental)
|
|
- Paging (soon)
|
|
- RRC inactivity timer (release of UE after a period of data inactivity)
|
|
|
|
### eNB X2AP
|
|
|
|
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 Failure
|
|
- Handover Request
|
|
- Handover Request Acknowledge
|
|
- UE Context Release
|
|
- X2 timers (t_reloc_prep, tx2_reloc_overall)
|
|
- Handover Cancel
|
|
- X2-U interface implemented
|
|
- 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
|
|
|
|
### eNB/MCE M2AP
|
|
|
|
The M2AP layer is based on **3GPP 36.443** v14.0.1:
|
|
- M2 Setup Request
|
|
- M2 Setup Response
|
|
- M2 Setup Failure
|
|
- M2 Scheduling Information
|
|
- M2 Scheduling Information Response
|
|
- M2 Session Start Request
|
|
- M2 Session Start Response
|
|
|
|
### MCE/MME M3AP
|
|
|
|
The M3AP layer is based on **3GPP 36.444** v14.0.1:
|
|
- M3 Setup Request
|
|
- M3 Setup Response
|
|
- M3 Setup Failure
|
|
- M3 Session Start Request
|
|
- M3 Session Start Response
|
|
|
|
|
|
## OpenAirInterface 4G LTE UE Feature Set
|
|
|
|
### LTE UE PHY Layer
|
|
|
|
The Physical layer implements **3GPP 36.211**, **36.212**, **36.213** and provides the following features:
|
|
|
|
- LTE release 8.6 compliant, and implements a subset of release 10
|
|
- FDD and TDD configurations: 1 (experimental) and 3
|
|
- Bandwidth: 5, 10, and 20 MHz
|
|
- Transmission modes: 1, 2 (stable)
|
|
- Max number of antennas: 2
|
|
- CQI/PMI reporting: aperiodic, feedback mode 3 - 0 and 3 - 1
|
|
- PRACH preamble format 0
|
|
- All downlink (DL) channels are supported: PSS, SSS, PBCH, PCFICH, PHICH, PDCCH, PDSCH, PMCH
|
|
- 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 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.
|
|
|
|
- RRC interface for CCCH, DCCH, and DTCH
|
|
- HARQ Support
|
|
- RA procedures and RNTI management
|
|
- RLC interface (AM, UM)
|
|
- UL power control
|
|
- Link adaptation
|
|
- MBMS-dedicated cell (feMBMS) RRC interface for BCCH
|
|
- eMBMS and MBMS-dedicated cell (feMBMS) RRC interface for MCCH, MTCH
|
|
|
|
### LTE UE RLC Layer
|
|
|
|
The RLC layer implements a full specification of the 3GPP 36.322 release v9.3.
|
|
|
|
### LTE UE PDCP Layer
|
|
|
|
The current PDCP layer is header compliant with **3GPP 36.323** Rel 10.1.0.
|
|
|
|
### LTE UE RRC Layer
|
|
|
|
The RRC layer is based on **3GPP 36.331** v14.3.0 and implements the following functions:
|
|
|
|
- System Information decoding
|
|
- RRC connection establishment
|
|
- MBMS-dedicated cell (feMBMS) SI-MBMS/SIB1-MBMS management
|
|
|
|
### LTE UE NAS Layer
|
|
|
|
The NAS layer is based on **3GPP 24.301** and implements the following functions:
|
|
|
|
- EMM attach/detach, authentication, tracking area update, and more
|
|
- ESM default/dedicated bearer, PDN connectivity, and more
|
|
|
|
[OAI softmodem build procedure](BUILD.md)
|
|
|
|
[Running the OAI softmodem ](RUNMODEM.md)
|