OAI 5g nr+usrp b210 installation and construction

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  Catalog

Preface

1.  Equipment environment

1.1  Hardware environment

1.2 USRP

1.3  System installation  

2.  Compile operation  

2.1 OAI compile  

2.2 OAI function  

2.3  Access test

2.4  matters needing attention  

3.  expand

Preface

OAI It's pretty good 5G Open source code , Like 4G At the time of the srsLTE equally . To build a real OAI Running environment , What's essential is USRP, about 5G SA Come on , It's best to use it. USRPB310 To set up , but B310 It's relatively difficult to buy , The price is also on the high side , and B210 It will be much more affordable . So this article uses USRP B210 Built . With OAI Current development progress , The terminal is not fully connected to the network yet , but RRC The connection can be completed .

OAI（OpenAirInterface） It's Europe EURECOM An open source project initiated and maintained by the organization NR/LTE project .

1.  Equipment environment

1.1  Hardware environment

5G-NR  The processing requirements are much higher than  4G, Therefore, we need high-end PC Or servers . at present OAI What are in use are ：

• Intel Core i7 6900K (8 cores), 16GB DDR, 480GB SSD. allow SW LDPC Running on the 3 On a nucleus （ the height is 30Mb/s）, perhaps LDPC Running on the FPGA（ stay 80MHz SISO Go up to  300Mb/s）.

• Intel Core i9 7980EX (18 cores). allow LDPC SW  The decoder is in parallel  9  or  12  On a kernel （ the height is 140Mb/s）, perhaps LDPC Running on the FPGA（ ditto ）.

• Intel(R) Xeon(R) Gold 6154 CPU @ 3.00GHz with 18 cores and 2x10Gbit Ethernet

1.2 USRP

USRP There are three options ：

• USRP N310

This is for  5G-NR  The latest version of the design  USRP, Support as much as  100MHz  The bandwidth of the .

     2. USRP X310

This older platform also applies to  5G-NR, But only up to  80MHz  Bandwidth and  3/4  sampling .

     3. USRP B210

The platform is available for use  3/4  Sampling up to  40MHz  The bandwidth of the .

We chose USRP B210, Its brief introduction is as follows ：

USRP B210  It provides a fully integrated single board general software radio peripheral  (USRP)  platform , have  70 MHz – 6 GHz  Continuous frequency coverage . It is designed for low-cost experiments , Combined with the  AD9361 RFIC  Direct frequency conversion transceiver , Provide up to  56MHz  Real time bandwidth 、 Open and reprogrammable  Spartan6 FPGA  And fast

SuperSpeed USB 3.0  Connect

And convenient bus power supply .

1.3  System installation  

• Install the system Ubuntu 18.04.

     2.  Replace 163 Source ：

sudo cp /etc/apt/sources.list /etc/apt/sources_bak.list

sudo vim /etc/apt/sources.list

Comment on the original official source , Replace with the following 163 Source ：

deb http://mirrors.163.com/ubuntu/ xenial main restricted universe multiversedeb http://mirrors.163.com/ubuntu/ xenial-security main restricted universe multiversedeb http://mirrors.163.com/ubuntu/ xenial-updates main restricted universe multiversedeb http://mirrors.163.com/ubuntu/ xenial-proposed main restricted universe multiversedeb http://mirrors.163.com/ubuntu/ xenial-backports main restricted universe multiversedeb-src http://mirrors.163.com/ubuntu/ xenial main restricted universe multiversedeb-src http://mirrors.163.com/ubuntu/ xenial-security main restricted universe multiversedeb-src http://mirrors.163.com/ubuntu/ xenial-updates main restricted universe multiversedeb-src http://mirrors.163.com/ubuntu/ xenial-proposed main restricted universe multiversedeb-src http://mirrors.163.com/ubuntu/ xenial-backports main restricted universe multiverse

3. The system update ：sudo apt-get update

2.  Compile operation  

2.1 OAI compile  

• download OAI Source code

git clone 

oai / openairinterface5G · GitLab

     2.  The code to compile

cd 

openairinterface5g

sudo git checkout develop

source oaienv

cd cmake_targets

vim tools/build_helper

Note the following two sentences ：

$SUDO rm -fr /opt/ssh

$SUDO git clonehttps://gist.github.com/2190472.git /opt/ssh

sudo ./build_oai -I --gNB -w USRP

     3. After compilation ,USRP The driver has been installed ,USRP Plug in USB Line , function uhd_find_devices See if there is information .

2.2 OAI function  

• Modify the configuration file

vim ../targets/PROJECTS/GENERIC-NR-5GC/CONF/gnb.sa.band78.fr1. 106PRB.usrpb210.conf

modify plmn、AMF IP and GNB IP:

plmn_list = ({

                  mcc = 460;

                  mnc = 03;


amf_ip_address    = ( { ipv4       = "192.168.88.31";   //5GC IP

                        ipv6       = "192:168:30::17";

                        active     = "yes";

                        preference = "ipv4";

                        }

                     );



    NETWORK_INTERFACES :

    {

        GNB_INTERFACE_NAME_FOR_NG_AMF            = "eth0";

        GNB_IPV4_ADDRESS_FOR_NG_AMF              = "192.168.88.31/24";  //oai Local IP

        GNB_INTERFACE_NAME_FOR_NGU               = "eth0";

        GNB_IPV4_ADDRESS_FOR_NGU                 = "192.168.88.31/24";

        GNB_PORT_FOR_S1U                         = 2152; # Spec 2152

    };

2. start-up 5GC

         Here we use our own 5GC.

     3.  start-up OAI

cd ran_build/build

sudo ./nr-softmodem -O ~/openairinterface5g/targets/PROJECTS/GENERIC-NR-5GC/CONF/gnb.sa.band78.fr1.106PRB.usrpb210.conf --sa -E

--SA

sa  Flag is used to run in stand-alone mode  gNB.

In order to run in stand-alone mode  gNB  and  UE, The following signs are required ：

--sa

stay  gNB  in ,--sa  The flag does the following ：

RRC According to the configuration file SIB1 Encoding , adopt NR-BCCH-DL-SCH transmission .

stay  UE  It's about ,--sa  The logo will ：

decode  SIB1  And start the  SA  Of  5G NR  Initial access procedure ：

• 5G-NR RRC  connections setting up

• NAS  Certification and security

• 5G-NR AS  Safety procedures

• 5G-NR RRC  Reconfiguration

• Start downlink and uplink data transmission

-E

Apply three-quarter of sampling frequency,23.04 Msps to reduce the data rate on USB/PCIe transfers(only valid for 20MHz).

2.3  Access test

use 5G The terminal performs access test , analysis Log, You can see RRC The access process is complete .

2.4  matters needing attention  

• Because the source code library is abroad , If it is difficult to download a source directory during compilation , It can be downloaded from build_helper Will correspond to git Sentence or wget Copy the statement , Download directly at the front desk , When the download is complete , Immediately comment out the corresponding rm Statement and git sentence , Avoid duplicate Downloads .

• If ubuntu  A domestic source has a problem due to update , In the local apt-get update Time error , Other domestic sources can be replaced .

• The first compilation is complete , In order to save the compilation time after subsequent code modification , Can be build_helper In the source code download command, comment out ：

#    rm -rf /tmp/protobuf-cpp-3.3.0.tar.gz* /tmp/protobuf-3.3.0

#    wget --tries=3 --retry-connrefused https://github.com/google/protobuf/releases/download/v3.3.0/protobuf-cpp-3.3.0.tar.gz

#    rm -rf /tmp/protobuf-c

#    git clone https://github.com/protobuf-c/protobuf-c.git

#    rm -rf /tmp/uhd

#    git clone https://github.com/EttusResearch/uhd.git

#    rm -rf /tmp/bladeRF

#    git clone https://github.com/Nuand/bladeRF.git

#    rm -rf /tmp/soapysdr

#    git clone -b soapy-sdr-0.7.0 --single-branch https://github.com/pothosware/SoapySDR.git

#    $SUDO rm -rf /tmp/asn1c

#    git clone https://gitlab.eurecom.fr/oai/asn1c.git /tmp/asn1c

3.  expand

OAI The binary files that can be generated by compiling are ：

• LTE user ： lte-uesoftmodem

• 5G User side ： nr-uesoftmodem

• LTE eNodeB： lte-softmodem

• 5G gNodeB： nr-softmodem

• LTE PHY  Simulator ：dlsim and ulsim

• 5G PHY  Simulator ： nr_dlschsim nr_dlsim nr_pbchsim nr_pucchsim nr_ulschsim nr_ulsim polartest smallblocktest ulsim ldpctest

structure  PHY  Simulator

Can be built as follows  PHY  Layer simulator （LTE  and  NR）：

cd <your oai installation directory>/openairinterface5g/

source oaienv

cd cmake_targets/

./build_oai -I --phy_simulators

After building , Binaries are in  cmake_targets/phy_simulators/build  Available in directory .target/bin  There is also a copy in the directory , All binaries are written in  3GPP  The version number is suffix , At present, it is .Rel15.

structure  UE、eNodeB  and  gNodeB  Executable file

After downloading the source file , You can use a single build command to get the executable ：

cd <your oai installation directory>/openairinterface5g/

source oaienv

cd cmake_targets/

./build_oai -I -w USRP --eNB --UE --nrUE --gNB

• The -I Option is a prerequisite for installation , Build only the first time  softmodem  Or something  oai  Dependency is needed only when it changes .

• The -w The option is to select RF board support .

• --eNB Is build lte-softmodem Executable files and all necessary shared libraries

• --gNB Is build nr-softmodem Executable files and all necessary shared libraries

• --UE Is build lte-uesoftmodem Executable files and all necessary shared libraries

• --nrUE Is build nr-uesoftmodem Executable files and all necessary shared libraries

It can be used in practice , Build any... Separately  oai softmodem  Executable file . After building , Binaries are in cmake_targets/ran_build/build Available in directory . The target/bin A copy is also provided in the directory , All binaries are written in  3GPP  The version number is suffix , At present, it is &nbsp;.Rel15.

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