top button
Flag Notify
    Connect to us
      Site Registration

Site Registration

DDN reduced to half from SGW. What are possible cause for it?

+2 votes
926 views
DDN reduced to half from SGW. What are possible cause for it?
posted Jan 5, 2017 by anonymous

Share this question
Facebook Share Button Twitter Share Button LinkedIn Share Button
Could be due to changes done at cgnat  especially on the tcp side and also sgw buffer timer changes at sgw.
Another reason could be implementation of low priority ddn throttling mechanism
hi,
We have done changes in IGR for routing, Could you explain howDDN reduced when changes done on NAT on tcp Side.

1 Answer

0 votes

If I understood your question and what I know through specification, SGW sends downlink data notification (DDN) to MME with a ARP for the bearer bearer Id data is received. MME priorities paging messages based on received ARP. I think due to this prioritization of paging based on ARP value, DDN reduces at SGW.
Please correct me if my understanding is wrong.

answer Jan 6, 2017 by Harshita
hi,
In Our network no priority has been set at SGW and also checked from pre and post traces no difference has been seen in DDN for ARP priority and also multiple MME are connected with same SGW and results are same for all.
Some activies might have been done at cgnat,cdn etc like tcp optimisation some tcp timer change or window size change.check tcp counters in gw..
Similar Questions
+1 vote

GTP tunnel id is a 32-bit long value over one IP address combination. Suppose there are two nodes A and B which has IP addresses X and Y respectively. Is it possible when first GTP tunnel id range gets exhausted then both the nodes starts using different IP address combination and again GTP tunnel id range can be re-used ? If it is impossible then what could be the reason ?

0 votes

Bearer split works if same SGW serving MeNB and SeNB. But if two different SGW is serving then is it possible to have bearer split?

0 votes

I have simple informatica(9.1) mapping(one to one) which loads data from flat file to RDBMS

it take 5 mins to load to Oracle db and 20 mins to load same file in SQL Server 2008 R2.

Can there be any source/pointers for performance improvement

...