Wireless Sensor Network      Jing (Selena) He Department of Computer        ScienceKennesaw State University
Content1   Background2   Applications of WSNs3   My Research Areas4   Discussion                           2
Background       Sensors Are Everywhere   .                                3
Background   SENSOR NODE    Sensing + Computation +     Communication    Small weight + Small size    Low energy consum...
Background   WHAT IS WIRELESS SENSOR NETWORK?                       Sensor Node                                      Data ...
Background        Characteristics of WSNs   • Limited power supply.   • No pre-defined or fixed infrastructure   • Multi-h...
Content1   Background2   Applications of WSNs3   My Research Areas4   Discussion                           7
Applications               WSN Applications                                  8
Applications               WSN Applications                                  9
Applications                     WSN Applications                         Level 1 sensor                         & motes  ...
Applications                       WSN Applications       Use sensors and actuators to sense and control environments     ...
Applications               WSN Applications                                  12
Applications               WSN Applications                                  13
Intelligent Car Parking System• Problem - finding a vacant car parking  space in a big parking area.   Wastage of time  ...
Intelligent Car Parking SystemMotivation• Provide customers within a  parking lot the ability to quickly  and easily find ...
DEMO       16
Content1   Background2   Applications of WSNs3   My Research Areas4   Discussion                           17
My Research Areas• Wireless Sensor Networks  – Topology Control  – Data Aggregation• Online Social Networks  – Influence N...
Interdisciplinary           Collaboration• Statistical• Biology & Chemical• Business Applications                         ...
Discussion             20
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S.he science cafehandout_02272013

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Dr. Jing (Selena) He's Science Cafe presentation for February 27, 2013. Hosted by Kennesaw State University's College of Science and Mathematics

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  • First, I will introduce some background information about the topic.And then, I will describe some problems which have not been addressed in the recent literatures.Thirdly, I will show the methods to solve the previously mentioned problems.Followed by the conclusions and future directions.
  • Wireless Sensor Networks are now widely used for monitoring and controlling systems where human intervention is not desirable or possible.
  • Besides the characteristics of the wireless ad hoc networks, a sensor network also has its own characteristics. 1. Power is the biggest and primary concern in sensor networks. Transmitting consumes much more energy than computations. The power to transmit 1 bit is enough for executing 3000 instructions. That’s why we need to reduce the communication cost as much as possible. 2&3. Since large number of sensor nodes are densely deployed, neighboring nodes may be very close to each other. So, multi-hop communication in sensor networks may consume less power than the traditional single hop communication since the transmission power level of each node can be kept low in sensor networks. 4. Some sensor nodes may fail due to lack of power, physical damage or environmental interference. The failure of some sensor nodes should not affect the overall task of the sensor network.5. Attribute-based naming is used where users are more interested in an attribute rather than an individual node. ‘the areas where the temperature is over 70’, instead of ‘the temperature at node #7’ . Data is what people expect from the sensor networks. Each sensor generates a data stream. Therefore, the amount of the generated data could be huge and how to manage and store the data is a challenging problem in sensor networks.
  • First, I will introduce some background information about the topic.And then, I will describe some problems which have not been addressed in the recent literatures.Thirdly, I will show the methods to solve the previously mentioned problems.Followed by the conclusions and future directions.
  • First, I will introduce some background information about the topic.And then, I will describe some problems which have not been addressed in the recent literatures.Thirdly, I will show the methods to solve the previously mentioned problems.Followed by the conclusions and future directions.
  • CRN: lots of spectrum sensing, spectrum scheduling and management are extensively investigated.Influence Maximization is the problem of finding a certain amount of people in a social network such that their aggregation influence through the network is maximized. For instance, in order to promote a new product, one can give a few influential people free samples of the product. Probably those people will recommend the product to their friends and many individuals will ultimately try it though such “world-of-mouth” effect. The IM problem is how to select the few initial people as seed set, such that the spread of influence can be maximized.
  • S.he science cafehandout_02272013

    1. 1. Wireless Sensor Network Jing (Selena) He Department of Computer ScienceKennesaw State University
    2. 2. Content1 Background2 Applications of WSNs3 My Research Areas4 Discussion 2
    3. 3. Background Sensors Are Everywhere . 3
    4. 4. Background SENSOR NODE  Sensing + Computation + Communication  Small weight + Small size  Low energy consumption 4
    5. 5. Background WHAT IS WIRELESS SENSOR NETWORK? Sensor Node Data Data Data DataBase Station Data(Sink Node) Data 5
    6. 6. Background Characteristics of WSNs • Limited power supply. • No pre-defined or fixed infrastructure • Multi-hop routing • Unstable and unreliable. • Low bandwidth. • Limited storage capacity and computational ability. 6
    7. 7. Content1 Background2 Applications of WSNs3 My Research Areas4 Discussion 7
    8. 8. Applications WSN Applications 8
    9. 9. Applications WSN Applications 9
    10. 10. Applications WSN Applications Level 1 sensor & motes Level 2 (Handheld) Level 3 (PC) Use body sensors to monitor health status, and enable remote doctor diagnosis without hospital visits 10
    11. 11. Applications WSN Applications Use sensors and actuators to sense and control environments in order to meet the demands of the environment and the health, safety, and productivity of its residents. 11
    12. 12. Applications WSN Applications 12
    13. 13. Applications WSN Applications 13
    14. 14. Intelligent Car Parking System• Problem - finding a vacant car parking space in a big parking area. Wastage of time Wastage of fuel Air pollution Driver frustration 14
    15. 15. Intelligent Car Parking SystemMotivation• Provide customers within a parking lot the ability to quickly and easily find an available parking space.• Provide a proper indication if there were no remaining parking spaces.• Customers - save time and fuel.• Owner -maximize the number of people able to park in a given area. 15
    16. 16. DEMO 16
    17. 17. Content1 Background2 Applications of WSNs3 My Research Areas4 Discussion 17
    18. 18. My Research Areas• Wireless Sensor Networks – Topology Control – Data Aggregation• Online Social Networks – Influence Node Set Selection Problem – Influence Propagation Problem• Cognitive Radio Networks – Secondary Users (SUs) to opportunistically exploit unused licensed spectrum without causing unacceptable interference to Primary Users (PUs). 18
    19. 19. Interdisciplinary Collaboration• Statistical• Biology & Chemical• Business Applications 19
    20. 20. Discussion 20
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