Wireless Sensor Network Technology [WiseNET]

What is Wireless Sensor Network?

Introduction

A wireless sensor network (WSN) is a wireless network consisting of spatially distributed autonomous devices using sensors to cooperatively monitor physical or environmental conditions, such as temperature, sound, vibration, pressure, motion or pollutants, at different locations.

WIRELESS SENSOR NETWORKS(WSN

1. Even though wireless sensors has limited resources in memory, computation power, bandwidth, and energy.

2. With small physical size, it Can be embedded in the physical environment.

3. Self-organizing multi-hop ad-doc networks.

WIRELESS SENSOR NODE

1. Sensor – Readout of a sensor, local storage of the data. It has full access to the hardware and is able to access the operating system directly.

2. Sensor node – Application specific tasks and functions of the middleware to build up and maintain the network.

3. Sensor network – It perform main task and required services.

CHARACTERISTICS

1. Self -Organization

2. Teny

3. Concurrency processing

4. Mobility of nodes

5. Low Cost

6. Scalability to large scale of deployment

7. Small radio range

8. Ease of use

9. Cross-layer design

FACTORS INFLUENCING WSN DESIGN

1. Fault tolerance

2. Scalability

3. Production costs

4. Hardware constraints

5. Sensor network topology

6. Environment

7. Transmission media

8. Power Consumption

  – Sensing

  – Communication

  – Data processing

APPLICATIONS

1. Military Applications

2. Environmental Applications

3. Health Applications

4. Home and Office Applications

5. Automotive Applications

6. Other Commercial Applications

ADVANTAGES

1. It avoids a lot of wiring .

2. It can accommodate new devices at any time .

3. It’s flexible to go through physical partitions .

4. It can be accessed through a centralized monitor

5. Infrastructure

DISADVANTAGES

1. Lower speed compared to wired network.

2. Easy for hackers to hack a network.

3. More complex to configure than wired network.

4. Gets distracted by various elements like Blue-tooth .

5. Still Costly at large.

6. It does not make sensing quantities in buildings easier.

7. It does not reduce costs for installation of sensors.

8. Life of nodes

9. Energy life

FUTURE OF WSN

1. Sensors controlling appliances and electrical devices in the house.

2. Better lighting and heating in office buildings.

3. The Pentagon building has used sensors extensively.