bluetooth technology coexistence of bluetooth and wi fi
Download
Skip this Video
Download Presentation
BLUETOOTH TECHNOLOGY Coexistence Of Bluetooth And Wi-Fi

Loading in 2 Seconds...

play fullscreen
1 / 26

BLUETOOTH TECHNOLOGY Coexistence Of Bluetooth And Wi-Fi - PowerPoint PPT Presentation


  • 114 Views
  • Uploaded on

BLUETOOTH TECHNOLOGY Coexistence Of Bluetooth And Wi-Fi. Presented by: JIGAR A. SHAH K.K. Wagh College of Engg. [email protected] YUGA SOMVANSHI K.K. Wagh College of Engg. Coexistence scenario. Overview of Wi-Fi (802.11b). It is specification for WLAN

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' BLUETOOTH TECHNOLOGY Coexistence Of Bluetooth And Wi-Fi' - aretha


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.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
bluetooth technology coexistence of bluetooth and wi fi
BLUETOOTH TECHNOLOGYCoexistence Of Bluetooth And Wi-Fi

Presented by:

JIGAR A. SHAH

K.K. Wagh College of Engg.

[email protected]

YUGA SOMVANSHI

K.K. Wagh College of Engg.

overview of wi fi 802 11b
Overview of Wi-Fi (802.11b)
  • It is specification for WLAN
  • Wireless Ethernet Compatibility Alliance certify product as Wi-Fi compatible
  • Data transmission on BPSK and QPSK
  • Data transmission at 11 Mbps
  • Direct Sequence Spread Spectrum (DSSS)
  • Devices are classified as Access Point and Station
  • Range of data transmission up to 100m
overview of bluetooth
Overview of Bluetooth
  • It is WPAN technology
  • Data transmission on GFSK
  • Hops at 1600Hz over 79 channels of 1MHz
  • Uses Frequency Hopping Spread Spectrum (FHSS)
  • Devices are classified as Master and Slave
  • Generally used as cable replacement technology
  • Communication range up to 10m
  • Data transmission at 724Kbps
what is coexistence
What is coexistence ?
  • “Coexistence”, the ability for multiple protocols to operate in the same frequency band without significant degradation to either’s operation
  • 2.4GHz ISM band is 83.5MHz wide with lower limit from 2.400GHz and higher limit from 2.4835GHz
  • Both Bluetooth and Wi-Fi utilizes same 2.4GHz ISM band
  • Bluetooth device hops over 79MHz channel and Wi-Fi requires 16MHz bandwidth – chances of interference are very high
  • Wi-Fi and Bluetooth are complementary rather than competing
methods for improved coexistence
Methods for Improved Coexistence
  • MAC layer switching
  • Adaptive Fragmentation for Wi-Fi Networks
  • Transmit Power control
  • Dynamic Channel Selection for Wi-Fi Network
  • Adaptive Frequency Hopping for Bluetooth Networks
fcc regulations for transmitting power
FCC Regulations for transmitting power
  • Section 15.247 of FCC regulation specifies high power transmission for FHSS and DSSS
  • Section 15.247a of FCC regulations limits high power transmitters up to 1 Watt for DSSS and FHSS
  • Minimum No. of channel to be hopped was 75 in 2002
  • To limit transmission power FCC changed min. number of channel to be hopped to 20 channels
factors on which determination of best channel depends
Factors on which determination of best channel depends:
  • Packet error rate
  • Channel noise
  • Channel multipath and intersymbol interference
  • Received signal strength
changes in bluetooth 1 2 specification
Changes in Bluetooth 1.2 specification
  • AFH is specified in Bluetooth 1.2 specification
  • Base band: Updated base band describes the algorithm used for generating an adapted hop channel set
  • LMP (Link Manger Protocol): it is updated with new message for communicating the bit mask that identifies which channel may be used and which are to be avoided
    • The bit mask consist of 79 bits which gives detail about which channel is to be used and unused
  • HCI (Host Controller Interface): it includes two new commands ;
    • First to exclude channels from list
    • Second one to read channel map currently in use
limitation of afh
Limitation of AFH
  • Not suitable for collocated Wi-Fi and Bluetooth devices,
  • Effectiveness depends on antenna isolation, transmit power of devices and the sensitivity of receiver
  • Requires antenna isolation
  • Cannot be used if either master or slave does not support it
  • Not effective for Bluetooth 1.1 compatible devices
afh is used with other coexistence technology
AFH is used with other coexistence technology
  • UltimateBlue™ by siliconwave
  • Intel Wireless Coexistence System (WCS)
  • Blue802™ technology
standardization activities
Standardization Activities
  • IEEE 802.15 WPAN has formed different task groups:
    • TG1 (802.15.1) : reformulating BT 1.x spec into IEEE standards
    • TG2 (802.15.2) : Recommend practices coexistence of wireless devices operating in the 2.4GHz band
  • Bluetooth SIG coexistence Working Group is established to make changes in Bluetooth standards
references
References
  • Andrew Tanenbaum: Computer networks, fourth edition
  • Douglas Comer: Computer Networks and Internet
  • Jennifer Bray, Charles Struman: Bluetooth-connect without cable
web references
www.ti.com/wlan (Texas Instrument)

www.wimaxforum.com

www.alcatel.com

www.stdsbbs.ieee.org/groups/802/11

www.bitpipe.com

www.interop.com

www.ieee802.org/15

www.bluetooth.org

www.codebluecommunication.com

www.3com.com

www.trillium.com

www.motorola.com

www.itpapers.com

www.siliconwave.com

www.wi-fi.org

www.mobilian.com

www.intel.com

Web - References
thank you

Thank You!

Questions?

ad