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Title:	Enhanced buffer management policy and packet prioritazation for wireless sensor network
Authors:	Abdiwahab Abdillahi Rabileh (P84260)
Supervisor:	Khairul Azmi Abu Bakar, Dr.
Keywords:	Wireless sensor networks Universiti Kebangsaan Malaysia -- Dissertations Dissertations, Academic -- Malaysia
Issue Date:	22-Jan-2019
Description:	Wireless sensor network (WSN) is a group of small sensors spatially dispersed to monitor and sense the targeted environment such as military surveillance, healthcare applications and weather applications. As most of these applications require optimal network performance, minimizing packet drop of the network is highly significant. Packet drop is a crucial problem in wireless sensor network due to frequent link disruptions. Due to lack of continuous end to end connection; two nodes may not be able to communicate with one another. Thus, communication may be established with the help of store and forward approach between source and destination node. In that case, sensor node may not be capable of storing a chunk of data since the buffer is available in small amounts. In order to store the data packets in the buffer when the link is down, efficiency buffer management scheme is highly needed to keep the packets for a long time until the link is re-established. Buffer overflow is also the main cause of packet drop when a higher traffic load arrives and occupies the sensor node since the buffer size plays a very important role in the performance of the network. Furthermore, multiple retransmissions of same packets are done to recover lost packets as a result of buffer overflow and frequent link disconnections. In order to overcome these problems, we propose a new buffer management scheme called Packet Priority Heterogonous Queue (PPHQ) which is based on prioritizing and classifying the packets into different categories to minimize the loss of important packets. The proposed scheme is evaluated using simulation. In our proposed scheme, the MATLAB simulator was applied and benchmarked with the existing schemes in the state-of-arts. Our simulation and analysis show that PPHQ scheme can be used to save all important packets. The other results show that PPHQ improves the overall throughput by 12.39% compared to the benchmarked scheme. Furthermore, the delay of packet is reduced by 4.2% compared to the benchmarked scheme. In the meantime, PPHQ shows 0.85% improvement of packet delivery ratio compared to benchmarked scheme while maintaining optimum buffer management policy for reducing loss of important packets.,Master of Computer Science,Certification of Master's / Doctoral Thesis" is not available"
Pages:	97
Call Number:	TK7872.D48R334 2019 3 tesis
Publisher:	UKM, Bangi
Appears in Collections:	Faculty of Information Science and Technology / Fakulti Teknologi dan Sains Maklumat

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