Table 1.

Similarities and differences.

	iAMCTD	Mobicast	DIEER
Deployment Strategy	Random, 3D deployment for monitoring ocean column sensing	Random, 3D deployment for monitoring ocean column sensing	Random, 3D deployment for monitoring ocean column sensing
Data collection	Through mobile Sink DBR-based, through forwarder nodes	Through mobile Sink	Through mobile Sink DBR-based, through forwarder nodes
Data-forwarding mechanism	DBR-based Holding time calculation based	Sleep–awake mechanism through mobile sink	DBR-based Holding time calculation based
Holding time calculation	Based on node’s depth Forwarding function metric-based	No holding time calculation	Based on node’s depth Depth threshold-based
Sensing mechanism	Periodic regularsensing	Periodic regularsensing	Periodic regularsensing
Sink mobility pattern	Initially wide elliptical paths In sparse conditions narrow elliptical paths	Apple slice technique used to cover all 3D zone of reference	Regular fixed elliptical paths
Data Aggregation	Simple	Simple	With pattern matching
Addresses time critical applications	Yes	No	Yes
Performance Evaluation Parameters	Average energy consumption End-to-end delay Throughput Transmission loss Network life time in terms of alive nodes and dead nodes	Average energy consumption End-to-end delay Through put Successful packet delivery ratio	Average energy consumption End-to-end delay Throughput Network life time in termsof alive nodes and dead nodes Scalability Analysis for: ⚬ Network lifetime ⚬ Throughput ⚬ Energy consumption