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Commit 24598a64 authored by Remi Hardy's avatar Remi Hardy
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restructuring the 5G part 

update of the 5G feature set (gNB and UE)
ref : Florian K ppt
parent 8b0d4e15
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doc/FEATURE_SET.md
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**Table of Contents**
1. [OpenAirInterface eNB Feature Set](#openairinterface-enb-feature-set)
1. [Functional Split Architecture](#functional-split-architecture)
2. [OpenAirInterface Block Diagram](#openairinterface-block-diagram)
2. [OpenAirInterface 4G-LTE eNB Feature Set](#openairinterface-4g-lte-enb-feature-set)
1. [eNB PHY Layer](#enb-phy-layer)
2. [eNB MAC Layer](#enb-mac-layer)
3. [eNB RLC Layer](#enb-rlc-layer)
......@@ -9,29 +11,38 @@
6. [eNB X2AP](#enb-x2ap)
7. [eNB/MCE M2AP](#enbmce-m2ap)
8. [MCE/MME M3AP](#mcemme-m3ap)
9. [eNB Advanced Features](#enb-advanced-features)
2. [OpenAirInterface Functional Split](#openairinterface-functional-split)
3. [OpenAirInterface UE Feature Set](#openairinterface-ue-feature-set)
3. [OpenAirInterface 4G-LTE UE Feature Set](#openairinterface-4g-lte-ue-feature-set)
1. [LTE UE PHY Layer](#lte-ue-phy-layer)
2. [LTE UE MAC Layer](#lte-ue-mac-layer)
3. [LTE UE RLC Layer](#lte-ue-rlc-layer)
4. [LTE UE PDCP Layer](#lte-ue-pdcp-layer)
5. [LTE UE RRC Layer](#lte-ue-rrc-layer)
4. [OpenAirInterface Functional Split](#openairinterface-functional-split)
5. [OpenAirInterface 5G-NR Feature Set](#openairinterface-5g-nr-feature-set)
4. [OpenAirInterface 5G-NR gNB Feature Set](#openairinterface-5g-nr-feature-set)
1. [General Parameters](#general-parameters)
2. [gNB Features](#gnb-features)
1. [gNB Physical Layer](#gnb-phy-layer)
2. [gNB Higher Layers](#gnb-higher-layers)
3. [NR UE Features](#nr-ue-features)
1. [NR UE Physical Layer](#nr-ue-phy-layer)
2. [NR UE Higher Layers](#nr-ue-higher-layers)
2. [gNB Physical Layer](#gnb-phy-layer)
3. [gNB Higher Layers](#gnb-higher-layers)
5. [OpenAirInterface 5G-NR UE Feature Set](#openairinterface-5g-nr-ue-feature-set)
1. [UE Physical Layer](#ue-phy-layer)
2. [UE Higher Layers](#ue-higher-layers)
# OpenAirInterface Block diagram #
# 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
![Functional Split Architecture](./oai_enb_func_split_arch.png)
# OpenAirInterface Block Diagram #
![Block Diagram](./oai_enb_block_diagram.png)
# OpenAirInterface eNB Feature Set #
# OpenAirInterface 4G LTE eNB Feature Set #
## eNB PHY Layer ##
......@@ -85,7 +96,7 @@ The MAC layer implements a subset of the **3GPP 36.321** release v8.6 in support
- 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
- Should remove out-of-sync UEs (to be clarified)
- 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
......@@ -180,7 +191,7 @@ The M3AP layer is based on **3GPP 36.444** v14.0.1:
- M3 Session Start Response
# OpenAirInterface UE Feature Set #
# OpenAirInterface 4G LTE UE Feature Set #
## LTE UE PHY Layer ##
......@@ -235,17 +246,6 @@ 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
# OpenAirInterface Functional Split #
- RCC: Radio-Cloud Center
- RAU: Radio-Access Unit
- RRU: Remote Radio-Unit
![Functional Split Architecture](./oai_enb_func_split_arch.png)
- 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 5G-NR Feature Set #
......@@ -263,49 +263,103 @@ The following features are valid for the gNB and the 5G-NR UE.
* Highly efficient 3GPP compliant polar encoder and decoder
* Encoder and decoder for short blocks
## gNB Features ##
### gNB PHY Layer ###
## gNB PHY Layer ##
* Generation of PSS/SSS/PBCH for multiple beams and
* Generation of PDCCH for SIB1 (including generation of DCI, polar encoding, scrambling, modulation, RB mapping, etc)
* 30KHz SCS for FR1 and 120 KHz SCS for FR2
* Generation of NR-PSS/NR-SSS
* NR-PBCH supports multiple SSBs and flexible periodicity
* Generation of NR-PDCCH for SIB1 (including generation of DCI, polar encoding, scrambling, modulation, RB mapping, etc)
- common search space configured by MIB
- user-specific search space configured by RRC
- DCI formats: 00, 10
* Generation of PDSCH (including Segmentation, LDPC encoding, rate matching, scrambling, modulation, RB mapping, etc).
- Single symbol DMRS, dmrs-TypeA-Position Pos2, DMRS configuration type 1
- DCI formats: 00, 10 (01 and 11 **under integration**)
* Generation of NR-PDSCH (including Segmentation, LDPC encoding, rate matching, scrambling, modulation, RB mapping, etc).
- Single symbol DMRS, DMRS-TypeA-Position Pos2, DMRS configuration type 1
- PDSCH mapping type A
* NR-CSI Generation of sequence at PHY (**under integration**)
* NR-PUSCH (including Segmentation, LDPC encoding, rate matching, scrambling, modulation, RB mapping, etc).
* NR-PUCCH
- Format 0 (ACK/NACK)
- Format 0 (2 bits, mainly for ACK/NACK)
- Format 2 (up to 64 bits, mainly for CSI feedback)
* 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 Higher Layers ##
**gNB RRC**
- NR RRC (38.331) Rel 15 messages using new asn1c
- LTE RRC (36.331) also updated to Rel 15
- Generation of MIB
- Generation of CellGroupConfig (for eNB) and MIB
- Application to read configuration file and program gNB RRC
- RRC -> MAC configuration
- MAC -> PHY configuration (using NR FAPI P5 interface)
- FAPI P7 interface for BCH PDU, DCI PDU, PDSCH PDU
- RRC can configure PDCP, RLC, MAC
**gNB X2AP**
- X2 setup with eNB
- Handling of SgNB Addition Request / Addition Request Acknowledge / Reconfiguration Complete
**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 for RA procedreat gNB
- MAC downlink scheduler (fixed allocations)
- MAC header generation (including timing advance)
- ACK / NACK handling and HARQ procedures for downlink
- **As of May 2020** only DL was validated with COTS phone ; UL in progress, validated with OAI UE in noS1 mode
# OpenAirInterface 5G-NR UE Feature Set #
**as of May 2020** only supporting "noS1" mode (DL):
- Creates TUN interface to PDCP to inject and receive user-place traffic
- Will only work with OAI gNB configured in the same mode
## UE PHY Layer ##
* Initial synchronization
* Time tracking based on PBCH DMRS
* Time tracking based on PBCH DMRS
* Frequency offset estimation
* PBCH RX
* PDCCH RX
* PDSCH RX, including a first version of dual stream receiver for PDSCH
* 30KHz SCS for FR1 and 120 KHz SCS for FR2
* Generation of NR-PSS/NR-SSS
* NR-PBCH supports multiple SSBs and flexible periodicity
* Generation of NR-PDCCH for SIB1 (including generation of DCI, polar encoding, scrambling, modulation, RB mapping, etc)
- common search space configured by MIB
- user-specific search space configured by RRC
- DCI formats: 00, 10 (01 and 11 **under integration**)
* Generation of NR-PDSCH (including Segmentation, LDPC encoding, rate matching, scrambling, modulation, RB mapping, etc).
- Single symbol DMRS, DMRS-TypeA-Position Pos2, DMRS configuration type 1
- PDSCH mapping type A
* NR-CSI Generation of sequence at PHY (**under integration**)
* NR-PUSCH (including Segmentation, LDPC encoding, rate matching, scrambling, modulation, RB mapping, etc).
* NR-PUCCH
- Format 0 (2 bits, mainly for ACK/NACK)
- Format 2 (up to 64 bits, mainly for CSI feedback)
* 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
For more details see [this document](https://gitlab.eurecom.fr/oai/openairinterface5g/uploads/ba5368448d627743a28c770c29e8978e/OAI_Software_Architecture_for_Dual_Connectivity_in_E-UTRA_and_5G-NR_and_nFAPI_for_MAC-PHY_Interface.docx)
## UE Higher Layers ##
## NR UE Features ##
**gNB MAC**
- Initial sync and MIB detection
- MAC -> PHY configuration of PHY via UE FAPI P5 interface
- Basic MAC to control PHY via UE FAPI P7 interface
- Random ccess procedure
### NR UE PHY Layer ###
**RLC**
- initial synchronization
- Time tracking based on PDCCH DMRS
- Frequency offset estimation
- PBCH RX
- PDCCH RX
- PDSCH RX
- including first version of dual stream receiver for PDSCH
**PDCP**
### NR UE higher Layers ###
For more details see [this document](https://gitlab.eurecom.fr/oai/openairinterface5g/uploads/f7386f3a64806fd6b2ac1fc3d0252fff/UE_FAPI-like_interface.docx)
[OAI wiki home](https://gitlab.eurecom.fr/oai/openairinterface5g/wikis/home)
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