I think this is an open-ended question. You would need to identify the aspect of WSN research (i.e., security, routing, energy efficiency, reliability, scalability, etc) that interests you. Once that is done you can now receive targeted answers in that regard. All these areas have exciting problems that can be identified for further research.

The WSN with dynamic agents is relatively new topic in WSN. Secondly, as many cpuputing devices such as mobile, consist of multiple sensors, the gap between MANET and WSN has reduced and therefore most of the challanges related to MANET are also applicable to WSN.

WSN for medical health care application also have few additional challanges than the traditional WSN. Finally, Multimedia sensor network have QoS requirement on top of energy saving requiremtns.

Sir!what about indoor location based services,is it new reseach area and has potential of work or not?

No, this is a very old topic. There are hundreds of papers on indoor localization techniques. Frankly speaking, this field is very saturated and its quite difficult to do some extra ordinary work, unless you focus on the hardware aspects. If still interested, you can explore the usage of WSNs in healthcare and smart cities.

Moreover, check the following articles

http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=90824

http://onworld.com/smartcities/

http://www.dtic.upf.edu/~bbellalt/OpenDataSmartCitiesMagazine.pdf

Thank you sir Atta you are really helping me.

The most significant area during these days on WSN are:

1. Cluster Improvement

2.Improvement of LEACH protocol

3. Vehicular Adhoc area Network (VANET)

1. Energy Optimization

2. Deployment Techniques

Dear Sifat,

The application of WSN to Structural Health Monitoring (SHM) calls for some multi-disciplinary developments. For instance

https://www.researchgate.net/publication/233808549_An_integrated_approach_to_the_design_of_wireless_sensor_networks_for_structural_health_monitoring?ev=prf_pub

Hope this may (partially) answer to your question.

Regards

Article An Integrated Approach to the Design of Wireless Sensor Netw...

Thanks to all of you.i have started my research work on localization in wireless sensor networks.

LEACH and its new variant HEED.

Crowedsensing, WSN with mobile nodes, Very High Density WSN and VANET

Data Mules/ Data Collection

Fault detection in wireless sensor networks

Multimedia Wireless  sensor networks

Signal processing in VANETs

Sujject me some  Topic  for research in wireless network

WSN in Agriculture

Remote sensing of  Explosive materials  by the sensing of chemical vaporization of  explosive materials .

Anomaly detection in a wireless sensor networks

Collaboration of Social networking facts and real world computation with WSN

Low power consumption and security issues..

3D sensing and coverage in underwater sensor network

Low power wsn, security advancement, localization

Data Collection using mobile sink, Sensor's Battery recharge using mobile Wireless Recharger, 3D Scenarios simulation, Energy Harvesting these are some hot research topics in WSN.

Multi Sensor Data fusions for laGre systems using WSNS

security issues and mobile data gathering

Energy Consumption algorithms

Machin learning in WSN

Energy-efficient routing algorithms in wireless sensor networks

Data collection using a mobile sink and recharge node using a mobile charger node and their path planning.

I think this is an open-ended question. You would need to identify the aspect of WSN research (i.e., security, routing, energy efficiency, reliability, scalability, etc) that interests you. Once that is done you can now receive targeted answers in that regard. All these areas have exciting problems that can be identified for further research.

If you can link the COVID-19 with WSN, it will be the trend area for WSN

I believe that applied WSN for Smart Cities and Industry 4.0 will be a trend for at least the next 10 years. I mean that many technological issues about WSN operation are already solved and what we are expecting now is increasing practical exploitation to achieve the expected benefits of such networks.

WSN for Smart Cities, Healthcare and Industry 4.0 will be a trend.

In the current scenario, research in the WSN domain can be classified into two major streams:

(i) Core: networking, protocol design, deployment strategy, green communication, etc.

(ii) Inferential: Data harvesting, context inferences, decision-making, data analysis, edge AI, etc.

The latter thrives various application domains, such as Smart Cities, Smart Healthcare, Smart Home, Smart Farming, Smart Agriculture, Industry 4.0/5.0, Intelligent Transportation System, etc. It fulfils the requirements of the modern era of IoT, which is driven by data. In today's scenario, data is an asset but turning data into an insightful knowledge with minimum overhead and minimum complexity, especially in WSN-led IoT applications, is a challenge. In recent years, the focus of research in WSN domain has shifted towards edge computing-based techniques and Edge AI to achieve a trade-off between challenges of the resource-constrained environment and utilization/processing of the sensed data to automate the operations with the effective decision-making in near real-time.

Optimization and Fault tolerance in WSN are open issues.