Dear Chandrika Dadhirao

Of course, there isnt a direct answer to that. There are several parameters to investigate:

1) First of all, how do you define a NL?

2) What is the battery capacity of your devices used in the network?

3) Channel, modulation, transmission distance and other physical layer parameters?

4) To see the min and max NL values, you may consider best case and worst case scenarios for a single network setup.

Several others... These are the main ones.

Please see: Article A Survey of Network Lifetime Maximization Techniques in Wire...

it depends upon the deployment model it can range from seconds to years. military applications usually have longer lives.

good question

Thank You All.

I will consider your Suggestions.

What is Network Lifetime

1.Generally defined as the time during which the network is operational. In other words the lifetime of network is defined as the operational time of the network during which it is able to perform the dedicated task(s). Learn more in: Routing Protocols in Wireless Sensor Networks

2.Time until the first sensor node or group of sensor nodes in the network runs out of energy. Learn more in: Genetic Algorithms for Wireless Sensor Networks

3.This is defined as the maximum duration of time during which deployed sensors have the capability of monitoring the phenomena of interest. Learn more in: Performance Evaluation of Quality of Service in IEEE 802.15.4-Based Wireless Sensor Networks

4.It is the amount of time that a Wireless Sensor Network would be fully operative. One of the most used definitions of network lifetime is the time at which the first network node runs out of energy to send a packet, because to lose a node could mean that the network could lose some functionalities. But, is also possible to use a different definition, in which some nodes could die or run out of battery power, whenever other network nodes could be used to capture desired information or to route information messages to their destination. Learn more in: QoS: Requirements, Design Features, and Challenges on Wireless Sensor Networks

5.The time (number of rounds) of network disconnection due to the failure of one or more sensor nodes. Learn more in: Graph Intersection-Based Benchmarking Algorithm for Maximum Stability Data Gathering Trees in Wireless Mobile Sensor Networks

6.This metric, commonly used in the WSN literature, is intended to reflect the time span from the network’s initial deployment to the first loss of coverage. As such, network lifetime can alternatively be defined as the ‘time until the first node dies’. The easiest to capture indicator of this metric is the maximum per-node load, where a node’s load corresponds to the number of packets sent from or routed through the given node. Clearly, the network setup that minimizes the maximum node load is the one that will ensure the maximum network lifetime. Learn more in: Sink Mobility in Wireless Sensor Networks: From Theory to Practice

https://www.igi-global.com/dictionary/network-lifetime/20144

It can range from several days to several years depending on the application and scenario.

In the following paper, different network battery lifetime metrics for M2M /sensor networks have been presented and formulated, including shortest individual lifetime (SIL), longest IL (LIL), average IL (AIL), and \alpha-SIL. The latter is of my interest and means that network lifetime is when x% of devices have their battery depleted. Moreover, the following paper shows how 4G/5G could be more energy efficient in serving IoT devices.

Network Lifetime Maximization for Cellular-Based M2M Networks

https://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=8045999

Thank you sir

it depends on apps you run.

SIL:-shortest individual lifetime, means that lossing even one node deteriorate the coverage or Qos .(i.e. telehealth)

LIL:-longest individual lifetime,means that the correlation between gathered nodes is high.. (i.e. temperature sensor)

Thakyou sir.