4.3. Packet delivery Ratio
Packet Delivery Ratio (PDR) is the ratio between the number of packets transmitted by a traffic
source and the number of packets received by a traffic sink. It measures the loss rate as seen by
transport protocols and as such, it characterizes both the correctness and efficiency of ad hoc
routing protocols. A high packet delivery ratio is desired in any network.
The ratio of the Originated applications’ data packets of each protocol which was able to deliver
at varying time are shown in Figures 5,6 & 7 as per Table 2. As packet delivery ratio shows
both the completeness and correctness of the routing protocol and also measure of efficiency the
PDR value of AODV is higher than all other protocols. The PDR values of DSR and AODV are
higher than that of DSDV. The PDR value of DSDV is worse in lower pause time and gradually
grows in higher pause time. From the above study, in view of packet delivery ratio, reliability of
AODV and DSR protocols is greater than DSDV protocol.