Khuzairi Mohd Zaini

An investigation of TFRC over AODV and DSR routing protocols

This paper conduct a comprehensive simulation study on the behavior of TCP-friendly Rate Control (TFRC) protocol over Ad-Hoc On Demand Vector (AODV) routing protocol and Dynamic Source Routing (DSR) protocol. The aim are first, to measure the performance of TFRC in terms of throughput, delay and jitter. The second objective is to identify which Mobile Ad-Hoc Network (MANET) routing protocols work well with TFRC. We conduct the experiment by sending multimedia streaming traffic carried by TFRC over AODV and DSR respectively. Random-Waypoint mobility model is used for both experiments. Results obtained shows that in average TFRC over AODV has more throughput and less delay as compared with TFRC over DSR. However, in terms of jitter, TFRC over DSR gives better result.

User Behavior Based Call Admission Control for Traffic Steering in Wi-Fi/Cellular Networks

The expanded growth in smartphones and applications, hence data traffic resulted in cellular networks being conspicuously overwhelmed with demand for resources. Service providers constantly looking for suitable technologies and mechanisms to reduce the network congestion by offloading the data traffic, where Wi-Fi is an excellent option. In the traffic steering process, network selection is the most vital process, as it affects the user’s network experience. This paper focuses on enhancing the procedure of Call Admission Control (CAC). Two key functions were introduced into the call admission procedure, namely Channel Reserve Engine (CRE) and Traffic Steering Policy (TSP). Based on the simulation results, it is found the proposed CAC reduces the call blocking probability as compared with conventional CAC. Thus, it is suitable to be implemented in WLAN/Cellular integration.

ANALYSIS OF INTERNET TRAFFIC IN EDUCATIONAL NETWORK BASED ON USERS' PREFERENCES

The demand for Internet services and network resour ces in Educational networks are increasing rapidly. Specifically, the revolution of web 2.0 “also refer red to as the Read-Write Web” has changed the way of information exchange and distribution. Although web 2.0 has gained attraction in all sectors of the education industry, but it results in high-traffic loads on networks which often leads to the Internet users’ dissatisfaction. Therefore, analyzing Internet traf fic becomes an urgent need to provide high-quality service, monitoring bandwidth usage. In this study, we focus on analyzing the Internet traffic in Universiti Ut ara Malaysia (UUM) main campus. We performed measurement analysis form the application level characteristics based on users’ preferences. A tota l of three methodological steps are carried out to meet the objective of this study namely data collection, dat a analysis and data presentation. The finding shows that social networks are the most web applications visit ed in UUM. These findings lead to facilitate the enhancement of Educational network performance and Internet bandwidth strategies.

A combination of mobility, load and services for network selection in heterogenous wireless network

WLAN has been considered as a compliment technology for cellular network in the heterogeneous wireless network. Thus, seamless connection between these technologies play important role as the performance indicator. In this paper, we consider the users velocity and channel holding time to predict the users dwelling time in the WLAN area to assist in the initial network selection. Based on the mobility prediction, network load and type of services, the proposed algorithm will select the most suitable radio access network for the user. In addition, we also incorporate the traffic offloading method in order to accept as many users to the system while maintaining the quality of service of the users. Through extensive discrete-event simulation, the results show that the proposed solution has better performance as compared to the location-based (WLAN First) and mobility threshold proposals.

Comparative Study on the Performance of TFRC over AODV and DSDV Routing Protocols

Nowadays, many researches in Mobile ad hoc network (MANET) focus mainly on the impact of MANET routing protocol to TCP variants, but none have been done on TFRC. In this paper, we present a comprehensive simulation study on the behavior of TCP-friendly Rate Control (TFRC) protocol over Ad-Hoc On Demand Vector (AODV) routing protocol and Destination-Sequenced Distance Vector (DSDV). The main objective is to measure the TFRC performance in terms of throughput, jitter and delay. In addition, this research also identifies whether or not MANET routing protocols have impact on TFRC. We conduct the experiment by sending multimedia streaming traffic carried by TFRC over AODV and DSDV respectively. Random-Waypoint mobility model is used for both experiments. Results obtained shows that TFRC has better throughput over DSDV. As for delay and jitter, TFRC over AODV has smoother results.

Improving Network Performance by Enabling Explicit Congestion Notification (ECN) in SCTP Control Chunks

The need for a reliable transmission protocol that can cover the Transport Control Protocol (TCP) and User Datagram Protocol (UDP) has prompted the Internet Engineering Task Force (IETF) to define a new protocol called the Stream Control Transmission Protocol (SCTP). This paper proposes adding Explicit Congestion Notification (ECN) mechanism into SCTP chunks (INIT chunk, and INIT-ACK chunk) to reduce the delay of transferring important data during congestion as compared with the TCP and UDP protocols. This paper also discusses the details of adding ECN, and the reason for choosing Random Early Detection (RED). Through the experimental analysis, we compare SCTP enabled ECN in INIT-ACK chunk to SCTP without ECN enabled in INIT-ACK chunk and demonstrate the result of ECN impact on SCTP delay time.