An Approach to measure the performance metrics of IEEE architectures with and without Relay nodes

Author Name(s): Fahmina Taranum, Khaleel Ur Rahman Khan
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The recent enhancements in signal processing techniques have led to faster and efficient mode of communication. In today’s smart environment, people with smart devices (nodes) can freely organize and configure scenarios to receive and send packets to destination over multiple nodes via intermediate connectives. The paper portrays multiple scenarios with and without relay node for both IEEE 802.11 and IEEE 802.16 architectures along with performance metrics of both. The architecture was designed using fewer mobile nodes and one base station which is connected via subnet .The CBR traffic is activated from the base station to the mobile stations and the traffic flows from base station to subscriber stations acting as destination nodes. The performance metrics parameter evaluated and analysed which includes average transmission delay, utilization factor, Average signal power, interference and path loss.


IEEE 802.11, IEEE802.16, Base station (BS), Subscriber station (SS) or Mobile station (MS), Constant bit rate (CBR)


The major concern in current technological advancement is power optimization, minimizing the battery usage, maximizing the features at the MSs. As the mobile stations moves with high speed the battery utilization is also high, which is taken as a challenge and many attempts were made to reduce the power consumption when MSs communicate with the BSs. The analysis shows that the signal arrival power at the mobile station is more when compared to base station in the designed scenarios. The concept of selecting a station type as that of base and subscriber type is available only in IEEE 802.16 but not in 802.11, still the scenario can be designed as that of destination and source with CBR connecting the source and destination node in IEEE 802.11.The closer the placement of node the better is the transmission. The provision to enable OFDMA at the MAC layer is available in IEEE 802.16 only. Therefore the OFDMA burst received and forwarded to MAC is analysed only in IEEE 802.16.To model the PHY layer certain characteristics need to be incorporated at the source and the destination end like modulation, coding, noise, interference and antenna gains. In QualNet, Physical Layer model consists of – a PHY and an antenna component. The PHY component caters for signal transmission, reception and reflects the effects of the MAC, distortions and interference. The antenna component models the functions and properties of the antenna like the model of antenna, etc. The rest of the paper is organized as follows: section II provides a brief description of related work; section III describes about topologies, section IV discusses the result analysis of 802.11 and 802.16 with and without relay. Section V portrays conclusion and future research scope.


The analysis shows that the performance is best in case of single relay node network when compared to no relay as depicted in Fig. 11. The same node positions and connectivity are used to compare the architecture on same data set for all the designed scenarios.Under future scope the mathematical evaluation can be used to show the power consumption levels of mobile and base station and design a scenario which utilizes less power using different energy models, battery models and power aware routing algorithms

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