Digital Information Research Centre (DIRC) Seminar
Date: Wednesday 16th March 2016
Speaker: Fariborz Entezami (Researcher, Wireless and Multimedia Networks Research Group)
Chair: Professor Christos Politis (Co-Director Digital Information Research Centre)
Title: Communications Theme Presentation – Link-Quality based Routing Framework for Wireless Sensor Networks
Wireless Sensor Networks (WSN)s play an important role in today’s data communication systems and researchers are expected to proliferate in the field of wireless communication in the near future. The deployment of wireless sensor network offers several advantages in comparison to traditional infrastructure based networks, such as fully distributed mobile operation, the easy discovery of joining wireless devices, and instant and low cost network setup. Designing an effective routing protocol is one of the main challenges in the ad-hoc networking paradigm and the utilisation of an adequate link-cost metric is essential.
This research studies a survey on existing routing protocols and link-quality metrics for wireless sensor networks and most of the routing protocols in this area are deliberate. The majority of link-quality metrics in WSNs are studied in different categories. Link-quality and traffic-aware metrics account for most of the metrics, as well as metrics in multi-channel networks and cognitive radio systems, which are also considered in detail. Metrics are reviewed in detail in terms of their performance; summary and comparison tables of link-quality metrics are provided to enable better comparison between these metrics and show a brief overview of their appearance to get a clearer picture.
One novel link-quality metric and also some routing protocols for wireless sensor networks are proposed to obtain better performance in different scenarios. A statistical analysis is done on some link-quality metrics to select the best metric for energy-aware scenarios.
Routing protocol plays an important role in wireless sensor’s data communication and the radio-frequency (RF) modules consume the majority of total energy consumption. Routing-metrics are important in determining paths and maintaining quality of service in routing protocols. The most efficient metrics need to send packets to maintain link-quality measurement by using the RF module. In this research, two prominent link-quality metrics; Received Signal Strength Indication (RSSI) and Link-Quality Indication (LQI), are described. The symmetry of RSSI and LQI in two directions is studied, and relations with the ETX, RSSI, and LQI as link-quality metrics are analysed. The evaluation in this research is based on a series of WSN test-beds in real scenarios.
Energy-Efficient Position-Based Adaptive Real-Time Routing protocol (EFPBARP) is presented and evaluated as a novel, real-time, position-based and energy-efficient routing protocol in this research. EFPBARP is a lightweight protocol that reduces the number of nodes which receive the RF signal using a novel Parent Forwarding Region (PFR) algorithm. EFPBARP as a Geographical Routing Protocol (GRP) reduces the number of forwarding nodes and thus decreases traffic and packet collision in the network.
WSNs are used in three-dimension (3D) scenarios such as sea or land surfaces with different levels of height. Three-Dimension Position-Based Adaptive Real-Time Routing Protocol (3DPBARP) is presented and evaluated as a novel, real-time, position-based and energy-efficient routing protocol for WSNs in this research. 3DPBARP is a lightweight protocol that reduces the number of nodes which receive the RF signal using a novel PFR algorithm. 3DPBARP as a GRP reduces the number of forwarding nodes and thus decreases traffic and packet collision in the network.