Regarding UE, LTE and WiFi

[JM Koo]

greetings everyone,

I would like your help regarding some questions I have:

1-  as far as I know, if I want eNBs to use a difference frequency in LTE I have to use MultiModelSpectrumChannel, and then change the EARFCN, and if I want to plot them with REM I need to change the RadioEnvironmentMapHelper::Earfcn attribute.  But how do I tell the UE which frequency to use? I mean, is there an attribute to the UEs to change the EARFCN? I enabled PhyTraces and I could see no UE attached to the eNB with a different EARFCN, UEs only attach to eNB with EARFCN = 100/18100.

2- regarding that same topic, is there a way to plot with REM a scenario with both EARFCN? or do I have to have two separate graphics for the same scenario with two frequencies?.

3-  to the best of my knowledge, a node can have multiple NetDeviceContainer, meaning a node (UE) could have both LTE and WiFi NetDeviceContainer; but if I were to attach such UE node to a WiFi AP, how would I do it?  I mean, for LTE we can use automatic attachment of uedevice given that we are using EPC, but how can I make UE choose between WiFi or LTE?

4- on that same note, is it possible to change attributes of UEs ch as tx power or rx threshold?

5- is there a way to plot a WiFi scenario like REM? showing coverage of AP nodes and position of STA? or only PyViz or NetAnim are available?

6- and last, is it possible for an UE to be attched to two different eNBs given that each eNB transmits at a different frequency? (or by no particular reason, in the same frequency?)

I know very much less of WiFi than LTE, so any help regarding WiFi related question would be much appreciated.

regards

J

[JM Koo]

Hello,

so I figured out how to change the UEs EARFCN, and I got it to work with different frequencies, but a question remains; how can I make a UE decide to which eNB attach to (given that each eNB is working with different EARFCNs).

I know from doxygen that for simplicity, only one EARFCN is supported by a single UE,  but I was wondering if anyone knows how to bypass this and make a UE choose the highest RSRP of two given frequencies.

any info related to my WiFi questions as well? thanks

regards,

J

[JM Koo]

can anyone help me here?

J

[hongyu deng]

Hi JM,

You can let UE work in different frequency,How do you do that?

Where to change UE's Earfcn?it's similar that the Earfcn in distribute by ENB.it same as ENB's Earfcn? isn't it?

Can you give me some guidance?

Thanks.

Havefun,

Hongyu.

[liru...@gmail.com]

Hi Hongyu,

ns3::LteUeNetDevice has an attribute called DlEarfcn, which by default is 100. In order to change the UE's EARFCN, I suggest to use the same way as you modify the earfcn value of the eNb's.

Good luck
Rui

[hongyu deng]

Hi Rui,

Thanks for your answer,but it seems that the UE can not work in different frequency,i modify in ENB but it does not work too.

When change the Earfcn in simulation process,the communication between UE and ENB lost,UE send data to ENB,but ENB can't RX the data from UE.

It seems a drawback in now ns3 version or i miss something.

Best,

Hongyu.

Have fun,

HongYu.

--
Posting to this group should follow these guidelines https://www.nsnam.org/wiki/Ns-3-users-guidelines-for-posting
---
You received this message because you are subscribed to a topic in the Google Groups "ns-3-users" group.
To unsubscribe from this topic, visit https://groups.google.com/d/topic/ns-3-users/drMe-PKzNuE/unsubscribe.
To unsubscribe from this group and all its topics, send an email to ns-3-users+...@googlegroups.com.
To post to this group, send email to ns-3-...@googlegroups.com.
Visit this group at https://groups.google.com/group/ns-3-users.
For more options, visit https://groups.google.com/d/optout.