BUKU ABSTRAK - Universiti Putra Malaysia

Science, Technology & Engineering
As the Internet becomes increasingly heterogeneous, the issue of congestion control becomes ever more
important. The link utilisation is one of the important things in terms of congestion avoidance and control
mechanisms as well. With that, we can define the utilisation as simply the throughput divided by the access rate.
In addition, all the developments for the congestion control and avoidance algorithms are interested about using
network resources and links capacity (utilisation). In this research, we continued to study the performances of
the New-Additive Increase Multiplicative Decrease (AIMD) algorithm as one of the core protocols for TCP
congestion avoidance and control mechanism. We want to evaluate the effect of using the AIMD algorithm after
developing it to find a new approach, as we called it the New-AIMD algorithm to measure the bottleneck link
utilisation and use the NCTUns simulator to get the results after making the modification of the mechanism.
We will also use the Droptail mechanism as Active Queue Management (AQM) in the bottleneck router. After
the implementation of our new approach with different number of flows, we will measure the bottleneck link
utilisation and we will get high utilisation (more than 94%) for bottleneck link by using this mechanism and avoid
the collisions in the link. Now and after the results that show high utilisation for bottleneck link, we know the
New-AIMD mechanism work as well under the giving network condition in the experiments.
Keywords: Congestion control, TCP, AIMD, network utilisation
Clothing Storage
This project aims to design a wardrobe that can be used within a narrow space living area. Most houses have
its own unused space such as wall corners, under staircase and behind doors. This space is often narrow and it is
not suitable for owners to put a furniture particularly the wardrobe. Currently, there is no specific wardrobe that
is purposely designed to fit within a narrow space. Existing wardrobe is normally large, bulky and requires huge
space utilization within the house interior. This wardrobe design is suitable to be used at narrow places because
of its flexibility and adjustable aspects. The wardrobe design can be modified into different shapes and sizes. In
addition, this wardrobe is user friendly, easy to fit within narrow spaces and affordable. It is also easy to fold and
convenient for storage purpose.
Keywords: Product design, furniture design
Bottleneck Link Utilisation with New-additive Increase Multiplicative Decrease
Congestion Avoidance and Control Algorithm
Dr. Zuriati Ahmad Zukarnain
Hayder Natiq Jasem, Mohamed Othman and Shamala Subramaniam
Faculty of Computer Science and Information Technology, University Putra Malaysia,
43400 UPM Serdang, Selangor, Malaysia.
+603-8946 6565; zuriati@fsktm.upm.edu.my
Mr. Ahmad Rizal Abdul Rahman
Shahrul Azman Shahbudin, Mohd. Azali Abdul Rahim and Asmawi Adzi
Faculty of Design and Architecture, University Putra Malaysia,
43400 UPM Serdang, Selangor, Malaysia.
+603-8946 4080; rizalrahman17@gmail.com
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