|
| Protocols | Focus area(s) of the paper | Limitations |
|
| E-HARP [12] | (i) Multiattribute-based technique for dynamic cluster head (CH) selection | (i) Packet delay is high |
| (ii) Cooperative routing | (ii) Network lifetime is far short |
| (iii) Optimum CH is selected based on calculated cost factor (CF) | (iii) Temperature of nodes in the network is very high |
|
| PCRP [13] | (i) Emergency data will get higher priority and less delay over normal data | (i) Packets drop ratio is high |
| (ii) The node with greater fitness value will be selected as a next-hop node | (ii) Network lifetime is less |
| (iii) SNR parameter is used for better selection of path between sender and receiver | (iii) End-to-End delay is high |
|
| ELR-W [14] | (i) A link efficiency-oriented network model is presented considering beaconing information and network initialization process | (i) Network lifetime is less |
| (ii) Path cost calculation model is derived focusing on energy aware link efficiency | (ii) High End-to-End delay |
|
| EH-RCB [15] | (i) Clustering approach to enhance nodes connectivity with each other to balance out load on single sink node | (i) Network lifetime is far short |
| (ii) CF is calculated using node total energy, distance from other nodes, link SNR and required transmission power | (ii) Packet delay is high |
|
| EB-MADM [16] | (i) Dynamic cluster head selection | (i) Path loss is high |
| (ii) An optimum node as cluster head which has higher residual energy level | (ii) Network lifetime is less |
| (iii) Selects a new cluster head for each transmission round |
| (iv) Cooperative effort of cluster nodes |
|
| PriNergy [17] | (i) Selecting appropriate parent member node in the RPL protocol | (i) Network lifetime is less |
| (ii) Increasing network efficiency in terms of optimal speed of packet transmission in the IoT environment | (ii) Packet drop is high |
|
| EHCRP [18] | (i) Link efficiency network model is presented which calculates the capability of the forwarder node in terms of its ability to send received/sensed data | (i) Path loss is high |
| (ii) Selects the forwarder node by calculating its PCE function | (ii) Network lifetime is less |
| | (iii) Packet drop is high |
|
| OPOT [19] | (i) Routing path is established by determining the temperature of sensor nodes to avoid hotspot region | (i) Path loss is high |
| (ii) Distance between sources to destination is measured and connection is established through shortest path to minimize delay and energy consumption | (ii) Network lifetime is less |
| | (iii) End-to-End delay is high |
|
| Proposed EERP-DPM | (i) DPM is used to reduce transmissions between sensor nodes and the medical server | (i) Add vital computational overhead |
| (ii) Data is transmitted if it is different from the data stored in previous data sensing |
| (iii) The medical server always presumes that its prediction reflects the real observation if it receives corrections from sensor nodes |
| (iv) Health data with high priority should be directly transmitted to the aggregator |
|
