fix CUDA latency
This commit is contained in:
NCTU OpinConnect Terng-Yin Hsu/WEI-YING,LIN
parent
579cfad82d
commit
0e5d4fe268
@@ -16,7 +16,6 @@ This page is valid on tags starting from **`2019.w09`**.
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# Soft Modem Build Script
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oai EPC is developed in a distinct project with it's own [documentation](https://github.com/OPENAIRINTERFACE/openair-cn/wiki) , it is not described here.
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OAI softmodem sources, which aim to implement 3GPP compliant UEs, eNodeB and gNodeB can be downloaded from the Eurecom [gitlab repository](./GET_SOURCES.md).
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+117
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@@ -1,6 +1,8 @@
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**Table of Contents**
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1. [OpenAirInterface eNB Feature Set](#openairinterface-enb-feature-set)
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1. [Functional Split Architecture](#functional-split-architecture)
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2. [OpenAirInterface Block Diagram](#openairinterface-block-diagram)
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2. [OpenAirInterface 4G-LTE eNB Feature Set](#openairinterface-4g-lte-enb-feature-set)
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1. [eNB PHY Layer](#enb-phy-layer)
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2. [eNB MAC Layer](#enb-mac-layer)
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3. [eNB RLC Layer](#enb-rlc-layer)
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@@ -9,29 +11,38 @@
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6. [eNB X2AP](#enb-x2ap)
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7. [eNB/MCE M2AP](#enbmce-m2ap)
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8. [MCE/MME M3AP](#mcemme-m3ap)
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9. [eNB Advanced Features](#enb-advanced-features)
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2. [OpenAirInterface Functional Split](#openairinterface-functional-split)
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3. [OpenAirInterface UE Feature Set](#openairinterface-ue-feature-set)
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3. [OpenAirInterface 4G-LTE UE Feature Set](#openairinterface-4g-lte-ue-feature-set)
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1. [LTE UE PHY Layer](#lte-ue-phy-layer)
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2. [LTE UE MAC Layer](#lte-ue-mac-layer)
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3. [LTE UE RLC Layer](#lte-ue-rlc-layer)
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4. [LTE UE PDCP Layer](#lte-ue-pdcp-layer)
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5. [LTE UE RRC Layer](#lte-ue-rrc-layer)
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4. [OpenAirInterface Functional Split](#openairinterface-functional-split)
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5. [OpenAirInterface 5G-NR Feature Set](#openairinterface-5g-nr-feature-set)
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4. [OpenAirInterface 5G-NR gNB Feature Set](#openairinterface-5g-nr-feature-set)
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1. [General Parameters](#general-parameters)
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2. [gNB Features](#gnb-features)
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1. [gNB Physical Layer](#gnb-phy-layer)
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2. [gNB Higher Layers](#gnb-higher-layers)
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3. [NR UE Features](#nr-ue-features)
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1. [NR UE Physical Layer](#nr-ue-phy-layer)
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2. [NR UE Higher Layers](#nr-ue-higher-layers)
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2. [gNB Physical Layer](#gnb-phy-layer)
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3. [gNB Higher Layers](#gnb-higher-layers)
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5. [OpenAirInterface 5G-NR UE Feature Set](#openairinterface-5g-nr-ue-feature-set)
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1. [UE Physical Layer](#ue-phy-layer)
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2. [UE Higher Layers](#ue-higher-layers)
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# OpenAirInterface Block diagram #
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# Functional Split Architecture #
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- RCC: Radio-Cloud Center
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- RAU: Radio-Access Unit
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- RRU: Remote Radio-Unit
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- IF4.5 / IF5 : similar to IEEE P1914.1
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- FAPI (IF2) : specified by Small Cell Forum (open-nFAPI implementation)
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- IF1 : F1 in 3GPP Release 15
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# OpenAirInterface Block Diagram #
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# OpenAirInterface eNB Feature Set #
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# OpenAirInterface 4G LTE eNB Feature Set #
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## eNB PHY Layer ##
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@@ -82,7 +93,11 @@ TDD UL: 20 MHz, 100 PRBS/ MCS **XX** | 3.0 Mbit/s | TM1: 4.21 Mbits/s
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The MAC layer implements a subset of the **3GPP 36.321** release v8.6 in support of BCH, DLSCH, RACH, and ULSCH channels.
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- RRC interface for CCCH, DCCH, and DTCH
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- Proportional fair scheduler (round robin scheduler soon)
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- Proportional fair scheduler (round robin scheduler soon), with the following improvements:
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- Up to 30 users tested in the L2 simulator, CCE allocation in the preprocessor ; the scheduler was also simplified and made more modular
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- Adaptative UL-HARQ
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- Remove out-of-sync UEs
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- No use of the `first_rb` in the UL scheduler ; respects `vrb_map_UL` and `vrb_map` in the DL
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- DCI generation
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- HARQ Support
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- RA procedures and RNTI management
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@@ -123,7 +138,7 @@ The current PDCP layer is header compliant with **3GPP 36.323** Rel 10.1.0 and i
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## eNB RRC Layer ##
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The RRC layer is based on **3GPP 36.331** v14.3.0 and implements the following functions:
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The RRC layer is based on **3GPP 36.331** v15.6 and implements the following functions:
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- System Information broadcast (SIB 1, 2, 3, and 13)
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* SIB1: Up to 6 PLMN IDs broadcast
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@@ -150,6 +165,10 @@ The X2AP layer is based on **3GPP 36.423** v14.6.0 and implements the following
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- X2 timers (t_reloc_prep, tx2_reloc_overall)
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- Handover Cancel
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- X2-U interface implemented
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- EN-DC is implemented
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- X2AP : Handling of SgNB Addition Request / Addition Request Acknowledge / Reconfiguration Complete
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- RRC : Handling of RRC Connection Reconfiguration with 5G cell info, configuration of 5G-NR measurements
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- S1AP : Handling of E-RAB Modification Indication / Confirmation
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## eNB/MCE M2AP ##
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@@ -171,11 +190,8 @@ The M3AP layer is based on **3GPP 36.444** v14.0.1:
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- M3 Session Start Request
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- M3 Session Start Response
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## eNB Advanced Features ##
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**To be completed**
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# OpenAirInterface UE Feature Set #
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# OpenAirInterface 4G LTE UE Feature Set #
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## LTE UE PHY Layer ##
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@@ -230,17 +246,6 @@ The NAS layer is based on **3GPP 24.301** and implements the following functions
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- EMM attach/detach, authentication, tracking area update, and more
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- ESM default/dedicated bearer, PDN connectivity, and more
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# OpenAirInterface Functional Split #
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- RCC: Radio-Cloud Center
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- RAU: Radio-Access Unit
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- RRU: Remote Radio-Unit
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- IF4.5 / IF5 : similar to IEEE P1914.1
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- FAPI (IF2) : specified by Small Cell Forum (open-nFAPI implementation)
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- IF1 : F1 in 3GPP Release 15
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# OpenAirInterface 5G-NR Feature Set #
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@@ -258,49 +263,103 @@ The following features are valid for the gNB and the 5G-NR UE.
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* Highly efficient 3GPP compliant polar encoder and decoder
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* Encoder and decoder for short blocks
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## gNB Features ##
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### gNB PHY Layer ###
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## gNB PHY Layer ##
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* Generation of PSS/SSS/PBCH for multiple beams and
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* Generation of PDCCH for SIB1 (including generation of DCI, polar encoding, scrambling, modulation, RB mapping, etc)
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* 30KHz SCS for FR1 and 120 KHz SCS for FR2
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* Generation of NR-PSS/NR-SSS
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* NR-PBCH supports multiple SSBs and flexible periodicity
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* Generation of NR-PDCCH for SIB1 (including generation of DCI, polar encoding, scrambling, modulation, RB mapping, etc)
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- common search space configured by MIB
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- user-specific search space configured by RRC
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- DCI formats: 00, 10
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* Generation of PDSCH (including Segmentation, LDPC encoding, rate matching, scrambling, modulation, RB mapping, etc).
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- Single symbol DMRS, dmrs-TypeA-Position Pos2, DMRS configuration type 1
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- PDSCH mapping type A
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- DCI formats: 00, 10 (01 and 11 **under integration**)
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* Generation of NR-PDSCH (including Segmentation, LDPC encoding, rate matching, scrambling, modulation, RB mapping, etc).
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- Single symbol DMRS, DMRS-TypeA-Position Pos2, DMRS configuration type 1
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- PDSCH mapping type A
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* NR-CSI Generation of sequence at PHY (**under integration**)
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* NR-PUSCH (including Segmentation, LDPC encoding, rate matching, scrambling, modulation, RB mapping, etc).
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* NR-PUCCH
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- Format 0 (ACK/NACK)
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- Format 0 (2 bits, mainly for ACK/NACK)
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- Format 2 (up to 64 bits, mainly for CSI feedback)
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* NR-PRACH
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- Formats 0,1,2,3, A1-A3, B1-B3
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* Highly efficient 3GPP compliant LDPC encoder and decoder (BG1 and BG2 are supported)
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* Highly efficient 3GPP compliant polar encoder and decoder
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* Encoder and decoder for short block
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### gNB higher Layers ###
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## gNB Higher Layers ##
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**gNB RRC**
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- NR RRC (38.331) Rel 15 messages using new asn1c
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- LTE RRC (36.331) also updated to Rel 15
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- Generation of MIB
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- Generation of CellGroupConfig (for eNB) and MIB
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- Application to read configuration file and program gNB RRC
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- RRC -> MAC configuration
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- MAC -> PHY configuration (using NR FAPI P5 interface)
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- FAPI P7 interface for BCH PDU, DCI PDU, PDSCH PDU
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- RRC can configure PDCP, RLC, MAC
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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)
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**gNB X2AP**
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- X2 setup with eNB
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- Handling of SgNB Addition Request / Addition Request Acknowledge / Reconfiguration Complete
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## NR UE Features ##
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**gNB MAC**
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- MAC -> PHY configuration using NR FAPI P5 interface
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- MAC <-> PHY data interface using FAPI P7 interface for BCH PDU, DCI PDU, PDSCH PDU
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- Scheduler for RA procedreat gNB
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- MAC downlink scheduler (fixed allocations)
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- MAC header generation (including timing advance)
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- ACK / NACK handling and HARQ procedures for downlink
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- **As of May 2020** only DL was validated with COTS phone ; UL in progress, validated with OAI UE in noS1 mode
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### NR UE PHY Layer ###
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# OpenAirInterface 5G-NR UE Feature Set #
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- initial synchronization
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- Time tracking based on PDCCH DMRS
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- Frequency offset estimation
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- PBCH RX
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- PDCCH RX
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- PDSCH RX
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- including first version of dual stream receiver for PDSCH
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**as of May 2020** only supporting "noS1" mode (DL):
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- Creates TUN interface to PDCP to inject and receive user-place traffic
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- Will only work with OAI gNB configured in the same mode
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## UE PHY Layer ##
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* Initial synchronization
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* Time tracking based on PBCH DMRS
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* Time tracking based on PBCH DMRS
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* Frequency offset estimation
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* PBCH RX
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* PDCCH RX
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* PDSCH RX, including a first version of dual stream receiver for PDSCH
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* 30KHz SCS for FR1 and 120 KHz SCS for FR2
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* Generation of NR-PSS/NR-SSS
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* NR-PBCH supports multiple SSBs and flexible periodicity
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* Generation of NR-PDCCH for SIB1 (including generation of DCI, polar encoding, scrambling, modulation, RB mapping, etc)
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- common search space configured by MIB
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- user-specific search space configured by RRC
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- DCI formats: 00, 10 (01 and 11 **under integration**)
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* Generation of NR-PDSCH (including Segmentation, LDPC encoding, rate matching, scrambling, modulation, RB mapping, etc).
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- Single symbol DMRS, DMRS-TypeA-Position Pos2, DMRS configuration type 1
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- PDSCH mapping type A
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* NR-CSI Generation of sequence at PHY (**under integration**)
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* NR-PUSCH (including Segmentation, LDPC encoding, rate matching, scrambling, modulation, RB mapping, etc).
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* NR-PUCCH
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- Format 0 (2 bits, mainly for ACK/NACK)
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- Format 2 (up to 64 bits, mainly for CSI feedback)
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* NR-PRACH
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- Formats 0,1,2,3, A1-A3, B1-B3
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* Highly efficient 3GPP compliant LDPC encoder and decoder (BG1 and BG2 are supported)
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* Highly efficient 3GPP compliant polar encoder and decoder
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* Encoder and decoder for short block
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## UE Higher Layers ##
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**gNB MAC**
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- Initial sync and MIB detection
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- MAC -> PHY configuration of PHY via UE FAPI P5 interface
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- Basic MAC to control PHY via UE FAPI P7 interface
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- Random access procedure
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**RLC**
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**PDCP**
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### NR UE higher Layers ###
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For more details see [this document](https://gitlab.eurecom.fr/oai/openairinterface5g/uploads/f7386f3a64806fd6b2ac1fc3d0252fff/UE_FAPI-like_interface.docx)
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[OAI wiki home](https://gitlab.eurecom.fr/oai/openairinterface5g/wikis/home)
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@@ -56,9 +56,56 @@ oai supports [number of deployment](FEATURE_SET.md) model, the following are tes
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1. [Monolithic eNodeB](https://gitlab.eurecom.fr/oai/openairinterface5g/wikis/HowToConnectCOTSUEwithOAIeNBNew) where the whole signal processing is performed in a single process
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2. if4p5 mode, where frequency domain samples are carried over ethernet, from the RRU which implement part of L1(FFT,IFFT,part of PRACH), to a RAU
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# 5G NR
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As of February 2020, all 5G NR development is part of the develop branch (the branch develop-nr is no longer maintained). This also means that all new development will be merged into there once it passes all the CI.
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## NSA setup with COTS UE
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This setup requires an EPC, an OAI eNB and gNB, and a COTS Phone. A dedicated page describe the setup can be found [here](https://gitlab.eurecom.fr/oai/openairinterface5g/wikis/home/gNB-COTS-UE-testing).
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### Launch gNB
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```bash sudo ./nr-softmodem -O ../../../targets/PROJECTS/GENERIC-LTE-EPC/CONF/gnb.band78.tm1.106PRB.usrpn300.conf```
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### Launch eNB
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```bash sudo ./lte-softmodem -O ../../../targets/PROJECTS/GENERIC-LTE-EPC/CONF/enb.band7.tm1.50PRB.usrpb210.conf```
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## phy-test setup with OAI UE
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The OAI UE can also be used in front of a OAI gNB without the support of eNB or EPC. In this case both gNB and eNB need to be run with the --phy-test flag. At the gNB this flag does the following
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- it reads the RRC configuration from the configuration file
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- it encodes the RRCConfiguration and the RBconfig message and stores them in the binary files rbconfig.raw and reconfig.raw
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- the MAC uses a pre-configured allocation of PDSCH and PUSCH with randomly generated payload
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At the UE the --phy-test flag will
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- read the binary files rbconfig.raw and reconfig.raw from the current directory (a different directory can be specified with the flag --rrc_config_path) and process them.
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### Launch gNB
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```bash sudo ./nr-softmodem -O ../../../targets/PROJECTS/GENERIC-LTE-EPC/CONF/gnb.band78.tm1.106PRB.usrpn300.conf --phy-test```
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### Launch UE in another window
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```bash sudo ./nr-uesoftmodem --phy-test [--rrc_config_path ../../../ci-scripts/rrc-files]```
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Some other useful paramters of the UE are
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- --ue-fo-compensation: enables the frequency offset compenstation at the UE. This is useful when running over the air and/or without an external clock/time source
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- --usrp-args: this is the equivalend paramter of sdr_addrs field in the gNB config file and can be used to identify the USRP and set some basic paramters (like the clock source)
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- --clock-source: sets the clock-source (internal or external).
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- --time-source: sets the time-source (internal or external).
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## noS1 setup with OAI UE
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Instead of randomly generated payload, in the phy-test mode we can also inject/receive user-plane traffic over a TUN interface. This is the so-called noS1 mode.
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This setup is described in the [rfsimulator page](../targets/ARCH/rfsimulator/README.md#5g-case). In theory this should also work with the real hardware target although this has yet to be tested.
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Reference in New Issue
Block a user