How to calculate the Packet Delivery Ratio for CoAP message in cooja simulator?

Description

In RPL routing using DODAG technique.One of the control message packet delivery is DIO (DoDAG information object).DIO is responsible in selecting parents in networking topology.

   Open a file at location:Home/user/
contiki/core/net/rpl-config.h

   In RPL nodes, DIO’s transmits
using trickle timer algorithm.One
of the way is to achieve trickle
algorithm.

  Imin: DIO message as
(2^DIO IntervalMin) ms.

  // The default value of DIO Interval
minimum is set .

#define DEFAULT_DIO_INTERVAL
_MIN.

  // Imax: The default value of
DIO Interval Doublings is set.

#define DEFAULT_DIO_INTERVAL_
DOUBLINGS.

   By modifying this we can create
a different time interval’s in DIO
packet sent

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