How to run oaisim with virtual MME on same machine

How to run oaisim with virtual MME on same machine

(example_oaisim_enb_ue_mme_virtual)

Since I don’t have much knowledge about EPC and MME, just follow the example file(example_oaisim_enb_ue_mme_virtual.txt)to make a test‚The example file has such an configuration,according to Lionel Gauthier.This example shows how to generate and launch enb, 1 ue (NAS still not virtualized in UE) in virtualised mode, mme_gw, hss executables on the same host‚

So I will put my own debug logs and some suggestions about the simulation,

1. Configuration

• freediameter 1.2.0 (not 1.1.5, 1.1.6,...) has to be installed and patched (done by check_install_oai_software() calling install_freediameter_from_source() in script build_helper)

• Config File:

/etc/hosts must contain the fqdn of the MME and HSS (same since both run on the same host):

(assuming the realm is openair4G.eur)

127.0.0.1 localhost

127.0.1.1 ubuntu.openair4G.eur ubuntu

If you run “build_oai –I” as it is, and input the “ubuntu” as the name( I don’t know who’s ?) , you can edit the /etc/hosts file like me.

2. Building HSS

2.1 You can build HSS like this, some key words have to be changed.

wujn@ubuntu:~/Simulator/OpenAir4G_trunk/trunk/cmake_targets tools/build_hss -c --connect-to-mme ubuntu.openair4G.eur -t -T --realm openair4G.eur

2.2 then you have to configure the HSS:

In oai_db (easier for newbies to access HSS database through http://127.0.0.1/phpmyadmin)

In table mmeidentity, enter the record corresponding to your MME:

(idmmeidentity, mmehost, mmerealm)

In table pdn, enter the record allowing an IMSI to connect to an APN

In table users, enter the record corresponding to your USIM card.

You may ( or may not) have some errors, when you type http://127.0.0.1/phpmyadmin, 404!!!!!( http://blog.youkuaiyun.com/junning_wu/article/details/46490767),

then you should run sudo ln -s /usr/share/phpmyadmin/ /var/www/html/ ,when you login the phpmyadmin,

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then you can config your own MME,

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and add your IMEI & SIM card

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Also, you have to change the configure file hss.conf like this:

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Or you may have some errors.

2.3 Run HSS

wujn@ubuntu:~/Simulator/OpenAir4G_trunk/trunk/cmake_targets sudo tools/run_hss -g

Now you can see in the terminal, the “STATE_CLOSED”. It is because the MME is still not running.

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3. Building the MME-GW

3.1 Build MME

wujn@ubuntu:~/Simulator/OpenAir4G_trunk/trunk/cmake_targets ./build_epc -c -d -t -T --s6a-server

If you have installed all the required libs, there will have no errors.

3.2 Configure MME

You can follow the example file, Since my knowledge about EPC is poor, I just leave it alone.( later I have some problems about tun2 interface and ping )

Configuring the MME-GW:

You can configure in file openair4G/trunk/cmake_targets/tools/epc.local.enb.conf.in the following parameters:

MCC/MNC of your network

SGI interface (outgoing interface of the S/P-GW)

Integrity algorithms, Ciphering algorithms

Please note that DNS addresses are hardcoded in source code (TODO in list).

3.3 Run MME

Running the MME-GW:

wujn@ubuntu:~/Simulator/OpenAir4G_trunk/trunk/cmake_targets sudo ./run_epc -l -g -K

At first, you still have the “STATE_CLOSED”,.

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Later, when HSS and MME are attached, you will see OPEN state.

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4. eNB and UE

4.1 Build eNB

Just run the bash file, if you want to initiate SCOPE, you can do it as you want.

wujn@ubuntu:~/Simulator/OpenAir4G_trunk/trunk/cmake_targets ./build_oai --oaisim

4.2 Config eNB

Please change the configure file, enb.band7.generic.oaisim.local_mme.conf, or you can leave it as it is.

Maybe I should change the MME parameters, But like I already said, my knowledge is so poor. ~~~~

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4.3 Run eNB

Now，suppose you have already run the HSS and MME, and They are all waiting the eNB & UE. You can run eNB like this.

wujn@ubuntu:~/Simulator/OpenAir4G_trunk/trunk/cmake_targets sudo tools/run_enb_ue_virt_s1 -m /tmp -K /tmp/enb_ue_virt_s1_itti.log

if you have initiated the soft scope, you will see some transactions between the eNB and UE..

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And in the EPC terminal , you can find 1 UE has attached.

And some message echange between MME and HSS.

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And if you run ifcong in a new terminal , you will find there has a tun2 & lo interface,

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You can ping tun2(though I don’t know what it mean????)

END

This page is just a begining , Next I will learn some materials about EPC & MME, and I still expect someone may help about the Topology about the default configuration files. I think THIS will help lots of people LIKE me.