In this paper, we show the recent progress of photonic network technologies for the new generation network (NWGN). The NWGN is based on new design concepts that look beyond the next generation network (NGN) and the Internet. The NWGN will maintain the sustainability of our prosperous civilization and help resolve various social issues and problems by the use of information and communication tec...

Introduction of circuits into the packet-switched network influences the QoS of the packets transported hop by hop. This report focuses on the correct dimensioning of two types of circuits in a butterfly network with different loads. The results show that depending on the load and routing mechanism, introduction of circuits can bring benefits for both the packets transported by the circuits and...

A packet analyzer is a tool for debugging sensor network systems and is convenient for developers. In this paper, we introduce a new packet analyzer based on an embedded system. The proposed packet analyzer is compatible with IEEE 802.15.4, which is suitable for the wireless communication standard for sensor networks, and is available for remote control by adopting a server-client scheme based ...

Network packet length covert channel modulates secret message bits onto the packet lengths to transmit secret messages. In this paper, a novel network packet length covert channel is proposed. The proposed scheme is based on the empirical distribution function of packet length series of legitimate traffic. Different from the existing schemes, the lengths of packets which are generated by the co...

Background traac models are fundamental to packet-level network simulation since the background traac impacts packet drop rates, queuing delays, end-to-end delay variation, and also determines available network bandwidth. In this paper, we present a statistical characterization of wide-area IP traac based on 90-minute traces taken from a week-long trace of packets exchanged between a large camp...

A network emulator, such as the Internet Protocol Traffic and Network Emulator (IP-TNE), enables real applications running on external hosts to interact via a virtual network modelled within the emulator. It combines a real-time network simulation engine with methods to capture specific packets from a network and write packets back to the network with customised headers. This paper explains the...

The exponential growth in Internet traffic has motivated the development of a new breed of microprocessors called Network Processors, which are designed to address the performance problem resulting from exploding Internet traffic. The development efforts of these network processors concentrate almost exclusively on streamlining their data-paths to speed up network packet processing, which mainl...

Mobile ad hoc network congestion control is a significant problem. Standard mechanism for congestion control (TCP), the ability to run certain features of a wireless network, several mutations are not common. In particular, the enormous changes in the network topology and the joint nature of the wireless network. It also creates significant challenges in mobile ad hoc networks (MANET), density ...

This paper proposes reliability improvements to the Cluster Based Routing Protocol (CBRP). Estimation of link reliability to facilitate alternate route redundancy together with the use of adaptive power control is introduced. Network performance is improved in terms of packet delivery ratio, average delay and overheads while at the same time operating at lower transmission power.

In this paper we study the effect of exponential backoff on the performance of network coding in a simple ad hoc network working based on slotted Aloha. To this end, we devise an analytical model based on an open multi-class queueing network to represent our scenario. In this model, by mapping backoff status of packet transmissions onto suitable classes of customers on one hand, and employing t...