1 / 14

Energy Aware Networks

Energy Aware Networks. By Kevin Burnette. Energy Aware Networks. What are energy aware networks? Why do we need energy awareness? How is energy awareness achieved?. What Are Energy Aware Networks.

vinaya
Télécharger la présentation

Energy Aware Networks

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Energy Aware Networks By Kevin Burnette

  2. Energy Aware Networks • What are energy aware networks? • Why do we need energy awareness? • How is energy awareness achieved?

  3. What Are Energy Aware Networks • An energy aware network is a system that has energy awareness built in to every stage of its design so that it can make dynamic tradeoffs between system performance and over all system life.

  4. What do we need it for? • Sensor nodes run off of a battery so they must operate on a very small power reserve. • Since batteries are not replaceable the nodes lifetime must be lengthened using energy aware techniques. • Energy consumption directly affects node lifetime and also the system lifetime.

  5. How do they do it? • Architecture (Hardware) • Algorithmic (Software) • Co-Design (Hardware and Software)

  6. Typical sensor node design

  7. Hardware • MCU - micro control unit, is the processor of the node • Radio – used in wireless communication between nodes • Sensors – used in event tracking in environments • Battery – powers the node • DC-DC – provides constant voltage to node

  8. Hardware - Life Issues • Power consumption of different operating modes (Idle, Active, Sleep), transition cost, and time spent in each mode will be the largest factors on node life dealing with the MCU. • Modulation technique, data rate, transmit power (determined by distance to receiver), and operational duty cycle are the largest life reducing factors from the radio.

  9. Hardware - More Life Issues • Sensors vary widely and their power consumptions do as well, however in some nodes it can be very high. • Exceeding the rated current draw from the battery for long periods can result in shorter battery life • The efficiency factor of the DC-DC unit is a major factor in determining the life of the node

  10. The life of a node if very dependent on the power consumptions of its components. To maximize life span tradeoffs on performance must be made to cut power consumption.

  11. Software • System lifetime can be increased if the OS, application layer, and network protocols are all designed to be energy aware. • The OS plays a major role in coordinating energy awareness between the other components • Energy awareness must also be designed into every layer of network protocols.

  12. Communication schemes • Communication can be very taxing on power resources. • Energy aware packet forwarding, modulation schemes and link layer optimizations are implemented to reduce this problem.

  13. Protocols • PAMAS • WiseMAC • MREP and variations • Flow augmentation • Flow redirection

  14. Co-Design • The best way to implement is by co-designing your hardware and software with energy awareness as the main goal. • Global decisions must be made energy aware such as traffic distribution, topology management.

More Related