LTE Round Robin scheduler and Bearer

[Stefania Zinno]

Hi, 

i have an enb with round robin scheduler. I have attached to this enb 2 Ue with 3 GBR_CONV_VOICE bearers and 3 other Ues with 3 active bearer each one (a GBR_NON_CONV_VIDEO,  a NGBR_VIDEO_TCP_PREMIUM and aNGBR_VIDEO_TCP_DEFAULT).

I want to know in a system with 25 NPRB and 5 Mhz bandwidth channel which is the current physical resource block in use.

I know i have resource block groups of 2 resource blocks and i also know Round Robin Scheduler doesn't take into account QCI. 

How does it work the scheduling?

So i want to know for each user and for each bearer how many resource block are scheduled?

[Marco Miozzo]

Hi,

you may find more info in the documentation:
http://www.nsnam.org/docs/release/3.16/models/html/lte-design.html#round-robin-rr-scheduler

Best regards,
marco.

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[Stefania Zinno]

Can you please tell me which ETSI paper are you referring to?

[bello parlare in inglese quando si è italiani :)]

[Marco Miozzo]

I did not refer to any ETSI paper, I've just provided you the link to the documentation.

Which paper are you referring to?

marco.

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[Stefania Zinno]

I thought as usual you were referring to an ETSI specific. all the documentation of most of that is based on them.

i need this parameter to be used in my code as a variable. (this came from a LOG which was inactive in the function) [see the attachment]

there's no source trace regarding this thing.. and i need to know at a specific time how many resource block are allocated in the enb.. 

Example: i have 25 resource block available in my enb and I run my scenario.. how many resource block are allocated in total?

I see this thing in the log.. but i'm not able to use that as a variable for my code..

[Marco Miozzo]

Hi,

Round Robin is not part on any ETSI documentation, since 3GPP does not provide any guidelines on this matter, it provides only the constraints.

The information you are asking about are spread in TS 213 and Sesia's book (S. Sesia, I. Toufik and M. Baker, “LTE - The UMTS Long Term Evolution - from theory to practice”, Wiley, 2009).

There is no parameter for setting the actual bandwidth usage in the scheduler, which basically tries to use as much bandwidth as possible in a best effort fashion.
In case you need a simple value in output like the log functionality with the amount of the RBs used in a certain TTI you may add a trace log in the scheduler as the one already used.

In case you would like to change the bandwidth you should play with the DlBandwidth and UlBandwidth as described in:
http://lena.cttc.es/manual/lte-user.html#configuration-of-lte-model-parameters

Best regards,
marco.

[Stefania Zinno]

and if i needed to use it as a variable for my code? and also something for the Composite Available Capacity?