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Re: [leshan-dev] Connectivity stats

Hi,

   Personally, I never used Connectivity statistics object but the spec v1.0.2§E.8[1] defines 6 Readable resources :

  • (0) SMS Tx Counter : Indicate the total number of SMS successfully transmitted during the collection period.
  • (1) SMS Rx Counter : Indicate the total number of SMS successfully received during the collection period.
  • (2) Tx Data : Indicate the total amount of IP data transmitted during the collection period.
  • (3) Rx Data : Indicate the total amount of IP data received during the collection period.
  • (4) Max Message : The maximum IP message size that is used during the collection period.
  • (5) Average Message Size : The average IP message size that is used during the collection period.

   And it explains : 

"Note: When reporting the Tx Data or Rx Data, the LwM2M Client reports the total KB transmitted/received over IP
bearer(s), including all protocol header bytes up to and including the IP header. This does not include lower level
retransmissions/optimizations (e.g. RAN, header compression) or SMS messages."

  I'm not an expert on this subject, but it seems it depends what you want to measure. If this is only "IP layer traffic" that sounds correct. If this is lower level layer traffic, that sounds not ok but maybe you could only get an approximation by refining result with approximative overhead layer ?

   Maybe you can have better answer at OMA : https://github.com/OpenMobileAlliance/OMA_LwM2M_for_Developers/issues

Simon

Le 13/02/2019 à 19:34, Reuben Hernandez a écrit :
Hi Everyone,

I'm bit confused with objective behind Connectivity statistics object. The spec doesn't clarify much.

"This LwM2M Objects enables client to collect statistical information and enables the LwM2M Server to retrieve these information, set the collection duration and reset the statistical parameters".

Could anyone suggest what this object is primarily and can be used for ?  is it for purpose like billing reconciliation? or it can be used for other purposes like link speed etc?Also otherwise, which object can be used to find the connectivity/link speed?

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