2.8 bluetooth ieee 802.15

Communication
Networks
Bluetooth
– IEEE 802.15

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
Visit www.youtube.com/GURUKULA for Lecture Videos

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.

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.

BLUETOOTH LAYERS

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

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.

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

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

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)

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.
• 5 slot frame:
• This frame frequency hops for every 5 slots

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]

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…

2.8 bluetooth ieee 802.15

More Related Content

What's hot

Similar to 2.8 bluetooth ieee 802.15

More from JAIGANESH SEKAR

Recently uploaded

2.8 bluetooth ieee 802.15