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---+ How to Connect OAI eNB (USRP B210) with OAI UE (USRP B210) without S1 Interface
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# How to Connect OAI eNB (USRP B210) with OAI UE (USRP B210) without S1 Interface
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This tutorial is intended to setup the OAI eNB and OAI UE without the S1 interface and allowed the UE to connect to eNB. You need 2 Ubuntu machine and svn version r7753 of OAI for this tutorial.
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The procedures includes the following:
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1 Build the eNB without S1 interface in 1st Ubuntu machine.
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1 Build the UE without S1 interface in 2nd Ubuntu machine.
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1 Bring up the OAI Interface.
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1 Run the eNB.
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1 Run the UE.
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1 Once UE attched to eNB, do some throughput test or ping.
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%TOC%
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---++ 1. Installing, Building and Running the OAI eNB and the OAI UE without S1 Interface
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1. Build the eNB without S1 interface in 1st Ubuntu machine.
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1. Build the UE without S1 interface in 2nd Ubuntu machine.
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1. Bring up the OAI Interface.
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1. Run the eNB.
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1. Run the UE.
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1. Once UE attched to eNB, do some throughput test or ping.
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## 1. Installing, Building and Running the OAI eNB and the OAI UE without S1 Interface
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Checklist prior to OAI installation:
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* Ubuntu 14.04 LTS (32-bit or 64-bit)
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* [[OpenAirKernelMainSetup][Kernel setup ]]
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* [Kernel setup](OpenAirKernelMainSetup)
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* Disable C-states from BIOS (or from GRUB)
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* Disable CPU freq. scaling
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* Install low-latency kernel
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* Install _subversion_ with the command:
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* __sudo apt-get install subversion__ for SVN version
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* Install _git_ with the command:
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* __sudo apt-get install git__ for GIT version.
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* Install UHD driver for USRP Hardware B210 using the following commands:
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* <div id="_mcePaste"> __sudo bash -c 'echo "deb http://files.ettus.com/binaries/uhd/repo/uhd/ubuntu/`lsb_release -cs` `lsb_release -cs` main" > /etc/apt/sources.list.d/ettus.list'__ </div>
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* <div id="_mcePaste"> __sudo apt-get install -t `lsb_release -cs` uhd__ </div>
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* <div id="_mcePaste"> __sudo apt-get update__ </div>
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* __Run Autobuild for installing missing packages:__
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* <em>The insructions are here,</em><span style="color: #7a4707; font-size: 10px; background-color: transparent;"><a href="AutoBuild" title="https://twiki.eurecom.fr/twiki/bin/view/OpenAirInterface/AutoBuild">https://twiki.eurecom.fr/twiki/bin/view/OpenAirInterface/AutoBuild</a></span>
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Note: UHD related information can be found at<em>: </em>http://files.ettus.com/manual/page_install.html#install_linux
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---+++ 1.1 Installation eNB on 1st Ubuntu Machine
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---++++ Step 1: Check out the GIT trunk version of OAI
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* Install _subversion_ with the command:
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* `sudo apt-get install subversion` for SVN version
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* Install _git_ with the command:
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* `sudo apt-get install git` for GIT version.
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* Install UHD driver for USRP Hardware B210 using the following commands:
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```shell
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sudo bash -c 'echo "deb http://files.ettus.com/binaries/uhd/repo/uhd/ubuntu/`lsb_release -cs` `lsb_release -cs` main" > /etc/apt/sources.list.d/ettus.list'
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sudo apt-get install -t `lsb_release -cs` uhd
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sudo apt-get update
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```
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* Run Autobuild for installing missing packages: the instructions are at [AutoBuild](AutoBuild)
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Note: UHD related information can be found at: http://files.ettus.com/manual/page_install.html#install_linux
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### 1.1 Installation eNB on 1st Ubuntu Machine
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#### Step 1: Check out the GIT trunk version of OAI
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Download the source codes using gitlab:
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<pre>mkdir -p ~/openairinterface5g
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</pre> <pre><span style="color: #000000; font-size: small; white-space: normal;">The instruction can be found at:</span></pre> <pre><a href="GetSources" title="https://twiki.eurecom.fr/twiki/bin/view/OpenAirInterface/GetSources">https://twiki.eurecom.fr/twiki/bin/view/OpenAirInterface/GetSources</a></pre>
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```shell
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mkdir -p ~/openairinterface5g
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```
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The instruction can be found at: [GetSources](GetSources).
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---++++ Step 2: Run Automated Build Script for eNB without S1 Interface
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#### Step 2: Run Automated Build Script for eNB without S1 Interface
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Build the eNB supporting B210:
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<pre>cd ~/openairinterface5g/
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source oaienv</pre> <pre>cd cmake_targets
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./build_oai -w USRP --eNB --noS1 -x</pre>
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This should starts the building process in ~/openairinterface4g/cmake_targets/lte_noS1_build_oai.
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```shell
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cd ~/openairinterface5g/
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source oaienv
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cd cmake_targets
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./build_oai -w USRP --eNB --noS1 -x
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```
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This should starts the building process in `~/openairinterface4g/cmake_targets/lte_noS1_build_oai`.
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Please refer to [AutoBuild](AutoBuild) if you run into problems.
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* Please refer the AutoBuild if you run into problem, here:
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<pre>https://twiki.eurecom.fr/twiki/bin/view/OpenAirInterface/AutoBuild</pre>
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### 1.2 Installation UE on 2nd Ubuntu Machine
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---+++ 1.2 Installation UE on 2nd Ubuntu Machine
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---++++ Step 1: Check out the GIT trunk version of OAI
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#### Step 1: Check out the GIT trunk version of OAI
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Download the source codes using gitlab:
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<pre>mkdir -p ~/openairinterface5g</pre> <pre><span style="color: #000000; font-size: small; white-space: normal;">The instruction can be found at:</span></pre> <pre>https://twiki.eurecom.fr/twiki/bin/view/OpenAirInterface/GetSources</pre>
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---++++ Step 2: Run Automated Build Script for UE without S1 Interface
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```shell
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mkdir -p ~/openairinterface5g
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```
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The instruction can be found at: [GetSources](GetSources).
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#### Step 2: Run Automated Build Script for UE without S1 Interface
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Build the UE supporting B210:
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<pre>cd ~/openairinterface5g
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```shell
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cd ~/openairinterface5g
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source oaienv
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cd cmake_targets
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./build_oai -w USRP --UE --noS1 -x</pre>
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./build_oai -w USRP --UE --noS1 -x
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```
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This should starts the building process in `~/openairinterface4g/cmake_targets/lte_noS1_build_oai`.
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Please refer to [AutoBuild](AutoBuild) if you run into problems.
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## 2. Running OAI eNB and OAI UE without S1 Interface
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This should starts the building process in ~/openairinterface4g/cmake_targets/lte_noS1_build_oai.
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The setup should be started with running the OAI eNB first before running
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the OAI UE. Both OAI eNB and OAI UE are running on LTE FDD Band 5 (DL: 875MHz, UL: 830MHz).
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* Please refer the AutoBuild if you run into problem, here:
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<pre>https://twiki.eurecom.fr/twiki/bin/view/OpenAirInterface/AutoBuild</pre>
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### 2.1 Run eNB on 1st Ubuntu Machine
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---++ 2. Running OAI eNB and OAI UE without S1 Interface
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#### Step 1: Loading the `nasmesh` Kernel Module and Setup the OAI Interface
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The setup should be started with running the OAI eNB first before running the OAI UE. Both OAI eNB and OAI UE are running on LTE FDD Band 5 (DL: 875MHz, UL: 830MHz).
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---+++ 2.1 Run eNB on 1st Ubuntu Machine
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---++++ Step 1: Loading the _nasmesh_ Kernel Module and Setup the OAI Interface
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Loading the `nasmesh.ko` to setup the radio bearer and providing the IP connectivity between eNB and attached UE.
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Loading the nasmesh.ko to setup the radio bearer and providing the IP connectivity between eNB and attached UE.
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<pre>cd ~/openairinterface5g/
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```shell
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cd ~/openairinterface5g/
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source oaienv
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source ./cmake_targets/tools/init_nas_nos1 eNB
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</pre>
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```
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You should now have the _oai0_ interface with IP address 10.0.1.1 netmask 255.255.255.0.
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You should now have the `oai0` interface with IP address 10.0.1.1 netmask 255.255.255.0.
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<strong>Note: </strong>In case that you are not able to load the nasmesh.ko, please make sure that OPENAIR_DIR is correctly set in the script.
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---++++ Step 2: Running the eNB
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**Note:** In case that you are not able to load the `nasmesh.ko`, please make sure that `OPENAIR_DIR` is correctly set in the script.
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#### Step 2: Running the eNB
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The command of running the eNB should be as follow:
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<pre>cd cmake_targets</pre> <pre>sudo -E ./lte_noS1_build_oai/build/lte-softmodem-nos1 -d -O $OPENAIR_TARGETS/PROJECTS/GENERIC-LTE-EPC/CONF/enb.band7.tm1.usrpb210.conf 2>&1 | tee ENB.log</pre>
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By running eNB with pipes "tee ENB.log", allow you to record the ENB logging to be used for further investigation.
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```shell
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cd cmake_targets
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sudo -E ./lte_noS1_build_oai/build/lte-softmodem-nos1 -d -O $OPENAIR_TARGETS/PROJECTS/GENERIC-LTE-EPC/CONF/enb.band7.tm1.usrpb210.conf 2>&1 | tee ENB.log
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```
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By running eNB with pipes `tee ENB.log`, allow you to record the ENB logging to be used for further investigation.
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**Note:** We have put a duplexer in the eNB to avoid background noise closed to
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saturating the receiver. You should get the noise floor similar to the diagram as shown below:
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<strong>Note: </strong>We have put a duplexer in the eNB to avoid background noise closed to saturating the receiver. You should get the noise floor similar to the diagram as shown below:
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<pre><img alt="eNB-noise-floor-1.png" src="https://twiki.eurecom.fr/twiki/pub/Sandbox/TestTopic1/eNB-noise-floor-1.png" /></pre>
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![eNB-noise-floor-1.png](HowToConnectOAIENBWithOAIUEWithoutS1Interface/eNB-noise-floor-1.png)
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The eNB's configuration file used for the testing can be found at [[%ATTACHURL%/enb.band5.tm1.usrpb210.conf][enb.band5.tm1.usrpb210.conf]].
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---+++ 2.2 Run UE on 2nd Ubuntu Machine
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---++++ Step 1: Loading the _nasmesh_ Kernel Module and Setup the OAI Interface
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The eNB's configuration file used for the testing can be found
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at [enb.band5.tm1.usrpb210.conf](HowToConnectOAIENBWithOAIUEWithoutS1Interface/enb.band5.tm1.usrpb210.conf).
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Loading the nasmesh.ko to setup the radio bearer and providing the IP connectivity between eNB and attached UE.
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<pre>cd ~/openairinterface5g/
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### 2.2 Run UE on 2nd Ubuntu Machine
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#### Step 1: Loading the `nasmesh` Kernel Module and Setup the OAI Interface
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Loading the `nasmesh.ko` to setup the radio bearer and providing the IP connectivity between eNB and attached UE.
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```shell
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cd ~/openairinterface5g/
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source ./targets/bin/init_nas_nos1 UE
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</pre>
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```
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You should now have the `oai0` interface with IP address 10.0.1.9 netmask 255.255.255.0.
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You should now have the _oai0_ interface with IP address 10.0.1.9 netmask 255.255.255.0.
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**Note:** In case that you are not able to load the `nasmesh.ko`, please make sure that `OPENAIR_DIR` is correctly set in the script.
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<strong>Note: </strong>In case that you are not able to load the nasmesh.ko, please make sure that OPENAIR_DIR is correctly set in the script.
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---++++ Step 2: Running the UE
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#### Step 2: Running the UE
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The command of running the UE should be as follow:
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<pre>cd cmake_targets
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sudo -E ./lte_noS1_build_oai/build/lte-softmodem-nos1 -U -C2680000000 -r25 --ue-scan-carrier --ue-txgain 70 --ue-rxgain 80 -d >&1 | tee UE.log
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```shell
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cd cmake_targets
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sudo -E ./lte_noS1_build_oai/build/lte-softmodem-nos1 -U -C2680000000 -r25 --ue-scan-carrier --ue-txgain 70 --ue-rxgain 80 -d >&1 | tee UE.log
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```
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</pre>
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By running UE with pipes `tee UE.log`, allow you to record the UE logging to be used for further investigation.
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By running UE with pipes "tee UE.log", allow you to record the UE logging to be used for further investigation.
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For the UE to able to sync with eNB, the timing advance needs to set 0 in FDD
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Band 5. (openair_daq_vars.timing_advance = 0). That patch can be found at [\[1\]][1] and use `-A 0` for setting timing advance to 0.
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For the UE to able to sync with eNB, the timing advance needs to set 0 in FDD Band 5. (openair_daq_vars.timing_advance = 0). That patch can be found at [1] and use "-A 0" for setting timing advance to 0.
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---+++ 2.3 Results of Successful UE attached to eNB
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### 2.3 Results of Successful UE attached to eNB
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If the user is successfully attached to the eNB, you should observe the RRCConnectionReconfigurationComplete message sent by the UE and the UE state is RRC_RECONFIGURED. The example of the UE log file can be found at [[%ATTACHURL%/UE.log][UE.log]].
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If the user is successfully attached to the eNB, you should observe the
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RRCConnectionReconfigurationComplete message sent by the UE and the UE
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state is RRC_RECONFIGURED. The example of the UE log file can be found
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at [UE.log](HowToConnectOAIENBWithOAIUEWithoutS1Interface/UE.log).
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The eNB will also indicate that the receiving of RRCConnectionReconfigurationComplete message from the UE and the UE state is moved to RRC_RECONFIGURED. The example of the eNB log file with OAI UE successfully attached can be found at [[%ATTACHURL%/ENB.log][ENB.log]].
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The eNB will also indicate that the receiving of RRCConnectionReconfigurationComplete
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message from the UE and the UE state is moved to RRC_RECONFIGURED. The example of
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the eNB log file with OAI UE successfully attached can be found
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at [ENB.log](HowToConnectOAIENBWithOAIUEWithoutS1Interface/ENB.log).
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When there is traffic going on between the UE and the eNB, the following stats, L2 stats and LTE UL Scope can be observed:
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LTE UL Scope eNB:
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<img alt="LTEULScopeL.png" src="https://twiki.eurecom.fr/twiki/pub/OpenAirInterface/HowToConnectOAIENBWithOAIUEWithoutS1Interface/LTEULScopeL.png" />
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![LTEULScopeL.png](HowToConnectOAIENBWithOAIUEWithoutS1Interface/LTEULScopeL.png)
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Stats:
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<img alt="LTEStats.png" src="https://twiki.eurecom.fr/twiki/pub/OpenAirInterface/HowToConnectOAIENBWithOAIUEWithoutS1Interface/LTEStats.png" />
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![LTEStats.png](HowToConnectOAIENBWithOAIUEWithoutS1Interface/LTEStats.png)
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L2 Stats:
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<img alt="LTEl2Stats.png" src="https://twiki.eurecom.fr/twiki/pub/OpenAirInterface/HowToConnectOAIENBWithOAIUEWithoutS1Interface/LTEl2Stats.png" />
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![LTEl2Stats.png](HowToConnectOAIENBWithOAIUEWithoutS1Interface/LTEl2Stats.png)
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When there is traffic going on between the UE and the eNB, the following stats and LTE DL Scope UE can be observed:
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LTE DL Scope UE:
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<img alt="LTEDLScopeL.png" src="https://twiki.eurecom.fr/twiki/pub/OpenAirInterface/HowToConnectOAIENBWithOAIUEWithoutS1Interface/LTEDLScopeL.png" />
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![LTEDLScopeL.png](HowToConnectOAIENBWithOAIUEWithoutS1Interface/LTEDLScopeL.png)
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Stats:
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<img alt="LTEDLStatsL.png" src="https://twiki.eurecom.fr/twiki/pub/OpenAirInterface/HowToConnectOAIENBWithOAIUEWithoutS1Interface/LTEDLStatsL.png" />
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---++ 3. Network Testing between OAI eNB and OAI UE without S1 Interface
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![LTEDLStatsL.png](HowToConnectOAIENBWithOAIUEWithoutS1Interface/LTEDLStatsL.png)
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## 3. Network Testing between OAI eNB and OAI UE without S1 Interface
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Once the UE is attached to the eNB, you should able to do simple ping test or iperf test.
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---+++ 3.1 Ping Test
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---++++ Step 1: Ping from UE to eNB
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Open the terminal and type the "ping 10.0.1.1 -c 10". This means sending 10 ICMP echo request packets from UE to eNB and expecting ICMP echo reply packets from eNB to UE.
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### 3.1 Ping Test
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#### Step 1: Ping from UE to eNB
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Open the terminal and type the `ping 10.0.1.1 -c 10`. This means sending
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10 ICMP echo request packets from UE to eNB and expecting ICMP echo reply packets from eNB to UE.
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You should see somethings, like that:
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<img alt="PING-UE-eNB.png" src="https://twiki.eurecom.fr/twiki/pub/Sandbox/ChunYeowYeohSandbox/PING-UE-eNB.png" />
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---++++ Step 2: Ping from eNB to UE
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![PING-UE-eNB.png](HowToConnectOAIENBWithOAIUEWithoutS1Interface/PING-UE-eNB.png)
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Open the terminal and type the "ping 10.0.1.9 -c 10". This means sending 10 ICMP echo request packets from eNB to UE and expecting ICMP echo reply packets from UE to eNB.
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#### Step 2: Ping from eNB to UE
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Open the terminal and type the `ping 10.0.1.9 -c 10`. This means sending
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10 ICMP echo request packets from eNB to UE and expecting ICMP echo reply packets from UE to eNB.
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You should see somethings, like that:
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<img alt="PING-eNB-UE.png" src="https://twiki.eurecom.fr/twiki/pub/Sandbox/ChunYeowYeohSandbox/PING-eNB-UE.png" />
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---+++ 3.2 Iperf Test
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---++++ UDP Test from UE to eNB
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![PING-eNB-UE.png](HowToConnectOAIENBWithOAIUEWithoutS1Interface/PING-eNB-UE.png)
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### 3.2 Iperf Test
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#### UDP Test from UE to eNB
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Open the terminal in eNB and type the "iperf -s -i 1 -u".
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Open the terminal in eNB and type the `iperf -s -i 1 -u`.
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Next, open the terminal in UE and type the "iperf -c 10.0.1.1 -i 1 -u -t 10 -b 1M". 1M means 1Mbps UDP throughput generated from UE to eNB.
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Next, open the terminal in UE and type the `iperf -c 10.0.1.1 -i 1 -u -t 10 -b 1M`.
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1M means 1Mbps UDP throughput generated from UE to eNB.
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The following results can be observed:
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<img alt="IPerf-ENB.png" src="https://twiki.eurecom.fr/twiki/pub/Sandbox/ChunYeowYeohSandbox/IPerf-ENB.png" />
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![IPerf-ENB.png](HowToConnectOAIENBWithOAIUEWithoutS1Interface/IPerf-ENB.png)
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<img alt="IPerf-UE.png" src="https://twiki.eurecom.fr/twiki/pub/Sandbox/ChunYeowYeohSandbox/IPerf-UE.png" />
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---++ Duplex and Antenna:
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... | ... | @@ -188,7 +242,7 @@ The picture of antenna [3] used for this testing and duplexer as follow: |
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[1] If you encounter the following errors reported by , please switch to the svn trunk version 7763:
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<span style="color: #222222; font-family: arial, sans-serif; font-size: 12.8000001907349px;">[PHY][I][pbch_detection] [UE0] Initial sync: starting PBCH detection (rx_offset 71032)</span><span style="color: #500050; font-family: arial, sans-serif; font-size: 12.8000001907349px;"><br />Program received signal SIGILL, Illegal instruction.<br /></span><span style="color: #222222; font-family: arial, sans-serif; font-size: 12.8000001907349px;">[Switching to Thread 0x7fffd7fff700 (LWP 18558)]</span><br /><span style="color: #222222; font-family: arial, sans-serif; font-size: 12.8000001907349px;">multadd_real_vector_complex_</span><span style="color: #222222; font-family: arial, sans-serif; font-size: 12.8000001907349px;">scalar (x=x@entry=0xb97bc0 <filt24_0>, alpha=alpha@entry=</span><span style="color: #222222; font-family: arial, sans-serif; font-size: 12.8000001907349px;">0x7fffd7ffe1f0,</span><br /><span style="color: #222222; font-family: arial, sans-serif; font-size: 12.8000001907349px;"> y=y@entry=0x354d91f0, N=N@entry=24) at /home/openairlte/openair4G/</span><span style="color: #222222; font-family: arial, sans-serif; font-size: 12.8000001907349px;">openair1/PHY/TOOLS/cmult_sv.c:</span><span style="color: #222222; font-family: arial, sans-serif; font-size: 12.8000001907349px;">94</span><br /><span style="color: #500050; font-family: arial, sans-serif; font-size: 12.8000001907349px;">94 alpha_r_128 = set1_int16(alpha[0]);</span>
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<span style="color: #222222; font-family: arial, sans-serif; font-size: 12.8000001907349px;">[PHY][I][pbch_detection] [UE0] Initial sync: starting PBCH detection (rx_offset 71032)</span><span style="color: #500050; font-family: arial, sans-serif; font-size: 12.8000001907349px;"><br />Program received signal SIGILL, Illegal instruction.<br /></span><span style="color: #222222; font-family: arial, sans-serif; font-size: 12.8000001907349px;">[Switching to Thread 0x7fffd7fff700 (LWP 18558)]</span><br /><span style="color: #222222; font-family: arial, sans-serif; font-size: 12.8000001907349px;">multadd_real_vector_complex_</span><span style="color: #222222; font-family: arial, sans-serif; font-size: 12.8000001907349px;">scalar (x=x@entry=0xb97bc0 <filt24_0>, alpha=alpha@entry=</span><span style="color: #222222; font-family: arial, sans-serif; font-size: 12.8000001907349px;">0x7fffd7ffe1f0,</span><br /><span style="color: #222222; font-family: arial, sans-serif; font-size: 12.8000001907349px;"> y=y@entry=0x354d91f0, N=N@entry=24) at /home/openairlte/openair4G/</span><span style="color: #222222; font-family: arial, sans-serif; font-size: 12.8000001907349px;">openair1/PHY/TOOLS/cmult_sv.c:</span><span style="color: #222222; font-family: arial, sans-serif; font-size: 12.8000001907349px;">94</span><br /><span style="color: #500050; font-family: arial, sans-serif; font-size: 12.8000001907349px;">94 alpha_r_128 = set1_int16(alpha[0]);</span>
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This is due to the <span style="color: #222222; font-family: arial, sans-serif; font-size: 12.8000001907349px;">machine doesn't support avx2 [2] and generates illegal instructions. EURECOM will soon </span><span style="color: #222222; font-family: arial, sans-serif; font-size: 12.8000001907349px;">introduce some new SIMD code which exploits the AVX2.</span>
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