This paper analyzes an optical switch with centralized partial wavelength conversion by means of a mean field model. The model can be used to approximate the behavior of a switch with a large number of output wavelengths, and it becomes more accurate as the number of wavelengths increases. At each wavelength packets arrive according to a Markovian arrival process, and their size follows a gener...

In many applications, the quality of data gathered by sensor networks is directly related to the signal-to-noise ratio (SNR) of the sensor data being transmitted in the networks. Different from the SNR that is often used in measuring the quality of communication links, the SNR used in this work measures how accurately the data in the network packets represent the physical parameters being sense...

Reliable secure multicast communication in mobile adhoc networks is challenging due to its inherent characteristics of infrastructure-less architecture with lack of central authority, high packet loss rates and limited resources such as bandwidth, time and power. Many emerging commercial and military applications require secure multicast communication in adhoc environments. Hence key management...

In pervasive computing environment, mobile ad-hoc group gaming will become one of the signficant entertainment applications. Mobile ad-hoc group gaming is where players form their wireless local network and play network games using wireless heterogeneous devices. In network games, it is important to synchronize game states among players appropriatly for keeping entartaining interactivity. Howev...

This paper studies the effect of packet loss during application weighted gradient descent to solve a resource allocation problem with piecewise quadratic cost functions in multi-agent system. We define two performance metrics that measure, respectively, deviation from constraint and error on expected function. derive upper bounds both metrics: are proportional difference between initial functio...

In traditional packet voice or the emerging 2.5G and 3G wireless data services, smooth and timely delivery of audio is an essential requirement in Quality of Service (QoS) provision. It has been shown in our previous work that, by adapting time-scale modification to audio signals, an adaptive play-out algorithm can be designed to minimize packet dropping at the receiver end. By stretching the a...

The paper deals with an influence of network jitter on effective packet loss in dejitter buffer. We analyze behavior of jitter buffers with and without packet reordering capability and quantify the additional packet loss caused by packets dropped in buffer on top of the measured network packet loss. We propose substitution of packet loss parameter Ppl in ITU-T E-Model by effective packet loss P...

Wireless technology has advanced to be become a vital part of our lives starting from mobile communication to health care departments. The main purpose of this research is to analyse and design efficient transmission control mechanisms for handling critical and non-critical data. In most of the existing literature works of WBAN, adaptive and reliable data transmission is handled individually. T...

In this paper, a Kalman filter based packet scheduling scheme with low complexity is proposed for LTE downlink system to adapt to various imperfect channel states. A channel quality predictor based on Kalman filter is developed to estimate the current channel quality information (CQI) from previous CQI value and observed CQI value, and a grouping method is employed to cover the gaps caused by K...