1. Short Distance Wireless Communication

2. Team 5 Thomas French Jordan Harris Mike Symanow Luseane Tangataevaha

3. Wireless Communication   Platforms:   Wi-Fi   Bluetooth   Zigbee   WWan   Concepts:   Advantages / Disadvantages   Applications

4. Wi-Fi   IEEE 802.11g   Data Rate: Maximum 54 Mbps   Product Range: up to 100 meters   Operating Frequency: 2.4 GHz   Security: Password Encryption

5. Wi-Fi   How It works:   Data Transmission/Acquisition   Wired Ethernet connection   OFDM   Closely spaced orthogonal sub-carriers.   Reduction of attenuation with high frequencies.   Facilitates single-frequency networking.   Broadcasting   Decoding of the Signal   Wireless Card

6. Wi-Fi Applications   Modem for internet   Cable   DSL   Device to device communication.

7. Wi-Fi   Advantages:   Comparatively higher data transfer rates than other similar technologies.   Low infrastructure   Wide availability   Disadvantages:   Cost   Limited range: Restricted to “Hot Spots”

8. Bluetooth  Open Wireless Protocol, WPAN standard  Operates ISM band at 2.4-2.4835 GHz  Uses radio technology called frequency- hopping spread spectrum  Modulation - Gaussian Frequency- Shift Key Modulation

9. Bluetooth  Frequency- Hopping Spread Spectrum  Chunks of data transmitted  Spread-spectrum signals are highly resistant to narrowband interference  Difficult to intercept  Transmissions share a frequency band with minimal interference

10. Bluetooth  Data rate up to 1Mb/s – 3 Mb/s  Use in mobile phones, laptops, telephones, printers, GPS, video game consoles  Bluetooth USB dongle – must use if computer is not Bluetooth enabled http://en.wikipedia.org/wiki/Bluetooth

11. Advantages/Disadvantages  Advantages:  Wireless, Inexpensive, Automatic  Low energy and power consumption  Disadvantages:  Security  Viruses over the years  Bluejacking  Health Concerns (same as mobile phones)

12. ZigBee   High-level communication protocol   Aim low   The Name   Zig-zagging of bees from flower to flower   Analogous to mesh networking

13. ZigBee Applications Source: http://www.zigbee.org/imwp/idms/popups/pop_download.asp?ContentID=7092

14. ZigBee Advantages   Extremely low power   Simple sensor: 1 AA = >5 years   Sleep modes allow decades of use   Low response time   Low cost

15. ZigBee Disadvantages   Low data rate   Bluetooth = 3Mbps; ZigBee = 250kbps   Low range   <35m on average   Geared towards very specific applications   “Aim low”

16. Wireless Wide Area Network (WWAN)   Wireless communication technology for data exchange over long distances.   ~7 miles maximum range.   Uses cell phone networks for data exchange.

17. Applications   Mobile Internet Access   Laptop Computers   Hand Held Devices (Cell Phones)   Net Books

18. Operation   Cell Phone network for data transfer   WiMAX communication.   IEEE 802.16 communication standard   Allows connection continuity between service areas

19. Performance   Current networks are typically 3G Cell   Typically 2.5 GHz, 70 Mb/s   Actual data transfer rates depend on range and strength of signal and data formatting.   Limitations   Network availability   Signal strength

20. Future  4G Cell Networks  Higher network capacity  100Mbit/s to 1Gbit/s data transfer rates  Smoother handoff  Operational by ~2010  Satelite Communication  Global internet access  High transfer rates

21. Summary Design Power UsageRange Data Transfer Ease of IntegrationCost Bluetooth100mW 100m 3Mbps Easy ~$150 Wi-Fi50mW 32m-95m 100Mbps Medium ~$360 ZigBee45mW <35m 250Kbps Difficult ~$12 WWanN/A 7km 54Kbps Difficult ~$850

22. QUESTIONS?