The document presents an overview of QoS aware routing protocols for wireless sensor networks. It discusses the EQRS protocol which uses a link cost function and path discovery phase to establish multiple paths between nodes while considering energy efficiency and QoS metrics. It also briefly describes the SAR and DAST protocols, with SAR using a table-driven approach to create multiple paths from sensors to a sink node based on energy resources and packet priority, and DAST utilizing location information and remaining energy to select paths.

1. QOS AWARE ROUTING
PROTOCOL FOR WSN
- BY GROUP 3: Kamal Patel (141060753011)
Khushbu Patel(141060753012)
Komal Patel(141060753013)
Riddhi Ghevariya((141060753015)
DATE:21/02/2015
IEEE Seminar on Wireless Sensor Network
At: GTU PG SCHOOL,GANDHINAGAR

2. Abstract
• Quality of service(Qos) is a pivotal index of WSNs
• WSNs one of the most important Qos factors is energy.
• For the limitation of energy it is vital to save energy consumption for
maintaining network
• The Qos based protocols allow sensor nodes to make a tradeoff
between the energy consumption and some Qos metrics before
delivering the data to the sink node.

3. Energy Efficiency and QOS aware multiple
routing protocol (EQRS)
• Assumption
• Link cost function (for next hope)
• Path discovery Phase
• Path maintainance (KEEPALIVE)
• Path selection
• Traffic allocation and data transmission
• Data transfer across multiple path
• -Data pct segmentation and encoding
• -data forwarding and recovery

4. EQRS
• Performance evaluation
1. Average end-to-end delay
2. PDR (pct delivery ratio)

5. Sequential Assignment Routing(SAR)
• Table-driven multi-path approach to achieve energy efficiency & fault
tolerance
• Creates trees rooted at one hop neighbors of the sink -> Form
multiple paths from sink to sensors
• QoS metrics, energy resource, priority level of each packet
• Local Failure Recovery
• Select one of the paths according to the energy resources and QoS on
the path
• High overhead to maintain tables and states at each sensor

6. Directed Alternative Spanning Tree (DAST)
• Broadcast RQP & get response from neighbour in form of RPP
• Knowing the X-Y Cordinates and remaining energy of the nodes
• node has its own location, the Sink’s X-Y coordinates, all neighbor
nodes’ X-Y coordinates and remaining energy of each neighbor

7. REFERENCES
[1] An Energy-Aware QoS Routing Protocol for Wireless Sensor Networks Kemal Akkaya and Mohamed
Younis Department of Computer Science and Electrical Engineering University of Maryland, Baltimore
County IEEE 23rd International Conference on Distributed Computing Systems Workshops (ICDCSW’03)
[2] A Novel QoS based routing protocol for WirelessActor and Sensor Networks ,Azzedine Boukerche,
IEEE GLOBECOM 2007 proceedings .
[3] DAST: a QoS-aware Routing Protocol for Wireless Sensor Networks , Peng Ji, Chengdong Wu, Yunzhou
Zhang, Zixi Jia Institute of Artificial Intelligence and Robot, Northeastern University Shenyang, Liaoning,
China The 2008 International Conference on Embedded Software and Systems Symposia
[4] An Energy Efficient and QoS Aware Multipath Routing Protocol for Wireless Sensor Networks Bashir
Yahya and Jalel Ben-Othman 2009 IEEE 34th Conference on Local Computer Networks (LCN 2009)
[5] A QoS Enhanced Routing Protocol in WirelessSensor Networks , Jing FENG , Xiaoxing YU Open
Research Foundation of Key Lab. for Computer Network and Information Integration in University IEEE