2.8 bluetooth ieee 802.152.8 bluetooth ieee 802.152.8 bluetooth ieee 802.152.8 bluetooth ieee 802.15

1. Communication
Networks
Bluetooth
– IEEE 802.15

2. Overview of Module - 2
• Framing
• What is Framing
• Types of Framing
• Methods for identifying the
boundaries
• Flow Control
• What is flow control
• Types of flow control
• Access Control
• What is access control
• Types of access control
• Ethernet – IEEE 802.3
• Evolution of Ethernet
• Frame Format of Ethernet
• Access Control for Ethernet
• Performance Evaluation of Ethernet
• WLAN – IEEE 802.11
• Architecture
• Bluetooth
• WIFI
• Zigbee
• 6LowPan
• Network Layer Services
• IPv4
• Packet switching
• Network Layer Protocols
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3. BLUETOOTH
• Bluetooth is a wireless LAN technology designed to connect
devices of different functions such as telephones, notebooks,
computers (desktop and laptop), cameras, printers.
• A Bluetooth LAN is an ad hoc network, which means that
the network is formed spontaneously; the devices, sometimes
called gadgets, find each other and make a network called a
piconet
• Bluetooth technology is the implementation of a protocol
defined by the IEEE 802.15 standard.
• The standard defines a wireless personal-area
network (PAN) operable in an area the size of a room or a
hall.
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4. ARCHITECTURE
• Bluetooth defines two types of networks:
Piconet Scatternet
• A Bluetooth network is called a piconet, or a
small net.
• A piconet can have up to eight stations, one of
which is called the primary; the rest are called
secondaries.
• Piconets can be combined to form a scatternet.
• A secondary station in one piconet can be the primary in
another piconet.
• This station can receive messages from the primary in the
first piconet (as a secondary) and, acting as a primary,
deliver them to secondaries in the second piconet.
• A station can be a member of two piconets.
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5. BLUETOOTH LAYERS
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6. Radio Layer
• This layer is roughly equivalent to
the physical layer.
• This also defines 3 other
parameters
• Operating Band
• It is operated in 2.4 GHz ISM Band
• FHSS
• It uses FHSS method. It hops 1600
times per second
• Modulation
• It uses GFSK (Gaussian FSK) – Version
of FSK as a modulation Technique
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7. Base Band Layer
• This layer is roughly equivalent to MAC Sub Layer.
• This layer defines the following parameters
• Access Method
• It uses TDD – TDMA as the access mechanism
• Physical Link
• There are 2 types of link that can be created between the
primary and secondary stations
• Synchronous Connection Oriented Link (SCL)
• This link is used when avoiding latency is more
important than any reliable delivery.
• No retransmission of frames occurs during
failure
• They are mainly used in audio communications
• Asynchronous Connectionless Link (ACL)
• This link is used when reliable delivery is more
important than any latency.
• Frames are retransmitted on the event of
failure.

8. L2CAP Layer
• Logical Link Control and Adaptation Layer
• They are roughly equivalent to the LLC sub layer.
• There are 4 specific duties
• Multiplexing
• It accepts the data from the upper layer and
delivers them to the lower layers
• Segmentation an Reassembly
• This layer divides the larger packets into segments
and adds extra information to define the location
of the segment in original packets
• At the destination this layer reassembles them
back.
• Quality of Service (QoS)
• QoS can be defined under any circumstances
• Group Management
• Bluetooth allows data transmission between the
group of users
• As similar to multicastVisit www.youtube.com/GURUKULA for Lecture Videos

9. L2CAP Frame Format
• Length :
• Indicates the size of the data field
• Channel ID:
• This defines the unique identifier for the virtual channel created
• Data and Control:
• Actual data to be sent.
• It can take a maximum value of 65,535 Bytes
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10. General Frame Format
Access Code:
• This field contains a synchronisation bits to
identify the primary from various piconets
• The secondary stations uses this bits to
synchronise their speed with their primary
station
Address:
• This field runs from 000 – 111 to define up to 7
secondary address.
• 000 – represents broadcast address.
Type:
• This field represents the type of data coming
form the upper layer
F :
• This field is used for flow control
• When this field is set to “1” it indicates that the
buffer is Full
A :
• This field is used for Acknowledgement
S :
• This field is used for Sequence Number
HEC (Header Error Correction) :
• This field is used for error detection (Check Sum)
Data :
• This field carries the actual data.
• The length of this field varies according to the
type of the frame (As Mentioned in the Figure)

11. Frame Format Types
• Bluetooth frame can be classified in to 3 types.
• 1 slot frame:
• This frame frequency hops for each slot.
• Duration of this frame is 366 Bits (Note)
• 3 slot frame:
• This frame frequency hops for every 3 slots.
• Duration of this frame is 1616 Bits (Note)
• 5 slot frame:
• This frame frequency hops for every 5 slots
• Duration of this frame is 2866 Bits (Note)
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12. Session Summary
• Introduction of Bluetooth
• Architecture of Bluetooth – Piconet and Scatternet
• Bluetooth Layers [ Radio, Base Band, L2cap Layers – Functions]
• Frame Format of Blutooth and its Types [1 slot, 3 slot, 5 slot]
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13. References:
• Behrouz A. Forouzan, ―Data communication and Networking, Fifth
Edition, Tata McGraw – Hill, 2013
• Larry L. Peterson, Bruce S. Davie, ―Computer Networks: A Systems
Approach, Fifth Edition, Morgan Kaufmann Publishers, 2011.
• Few online References (Will be Mentioned in the description Section)
Thank You…