This paper explores traffic dynamics and performance of complex networks. Complex networks of various structures are studied. We use node betweenness centrality, network polarization, and average path length to capture the structural characteristics of a network. Network throughput, delay, and packet loss are used as network performance measures. We investigate how internal traffic, through put...

A packet-switching algorithm specifies the actions of the nodes in order to deliver packets in the network. A packet-switching algorithm is universal if it applies to any network topology and for any batch communication problem on the network. A long standing open problem has concerned the existence of a universal packet-switching algorithm with near optimal performance guarantees for the class...

Covert Channel are the methods to conceal a message in the volatile medium carrier such as radio signal and network packets. Until now, covert channels based on the packet length produce abnormal packet length when the length of the message is long. Abnormal packet length, especially in the normal network will expose the covert channels to network security perimeter. Therefore, it motivates the...

Packet size and packet rate are two important parameters that need to be considered when using wireless networks in any application. Different values of these parameters provide different network performance. Sending large packets over wireless networks leads to reduce packet header overhead, but may have adverse impact on the number of lost packets due to collisions or corruptions in a wireles...

TCP (Transmission Control Protocol) is the most widely-used protocol on Internet. It divides one large data into small sized packets, called segments. Segmentation is useful for improving network performance. It has a major problem in that its congestion control algorithm does not allow flows to obtain full available bandwidth during fast long-distance links. One of the tools for evaluating TCP...

In this paper, we discuss a design of a real-time DV (Digital Video) streaming system, which dynamically adjusts packet transmission rate from the source host according to feedback information from the network. In our DV streaming system, the destination host continuously notifies the source host of network status (e.g., the end-to-end packet transmission delay and the packet loss probability i...