eNodeB/cell shape and UE handover in LTE LENA

[Dapeng Liu]

Hi,

I have two questions regarding the LTE LENA:

What kind of shape for eNodeB is supported in LTE LENA, hexagon or circle? How to define the parameters for this setting? Is each eNodeB a cell or it may have 3 cells like hexagonal coverage?

Since LTE LENA does not support handover, what happens if a user keeps moving and go very far from the eNodeB? Does the throughput go down to 0 and no signal at all?

Thanks a lot.

[Luca Costantino]

Il 27 aprile 2012 08:17, Dapeng Liu <auror...@gmail.com> ha scritto:
> Hi,
hi

> I have two questions regarding the LTE LENA:
>
> What kind of shape for eNodeB is supported in LTE LENA, hexagon or circle?
> How to define the parameters for this setting? Is each eNodeB a cell or it
> may have 3 cells like hexagonal coverage?

circular cells for my experiences

> Since LTE LENA does not support handover, what happens if a user keeps
> moving and go very far from the eNodeB? Does the throughput go down to 0 and
> no signal at all?

sinr becomes too much and no transmission are made

you can do a simple try. install and enb in 0,0,0 with no mobility model
attach a single ue with constant velocity mobility model e place in 0,0,0 too
make the node move in one direction with 3kmph for example
collect and plot sinr data as the distance increases

regards
luac


> Thanks a lot.
>
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[Marco Miozzo]

HI all,

On Fri, Apr 27, 2012 at 8:26 AM, Luca Costantino <luca.co...@gmail.com> wrote:

Il 27 aprile 2012 08:17, Dapeng Liu <auror...@gmail.com> ha scritto:
> Hi,
hi

> I have two questions regarding the LTE LENA:
>
> What kind of shape for eNodeB is supported in LTE LENA, hexagon or circle?
> How to define the parameters for this setting? Is each eNodeB a cell or it
> may have 3 cells like hexagonal coverage?

circular cells for my experiences

also sector antennas are supported, see example:
lena-rem-sector-antenna.cc
 

> Since LTE LENA does not support handover, what happens if a user keeps
> moving and go very far from the eNodeB? Does the throughput go down to 0 and
> no signal at all?

sinr becomes too much and no transmission are made

you can do a simple try. install and enb in 0,0,0 with no mobility model
attach a single ue with constant velocity mobility model e place in 0,0,0 too
make the node move in one direction with 3kmph for example
collect and plot sinr data as the distance increases

I confirm this behavior.

 

[Luca Costantino]

out of curiosity, i found one of my old testing graph

luca

[alex 13]

Hi Luca, 

I am trying to implement an example like you have described before, but I don't know how to get the SINR info from received packets. Could you give me some advice or example code please? It would be awesome, 

Thanks a lot,

Alex

[Nicola Baldo]

> What kind of shape for eNodeB is supported in LTE LENA, hexagon or circle?
> How to define the parameters for this setting? Is each eNodeB a cell or it
> may have 3 cells like hexagonal coverage?

circular cells for my experiences

also sector antennas are supported, see example:
lena-rem-sector-antenna.cc

also note that the example lena-dual-stripe implements an hexagonal cell layout with 3 sectors per site.