The problem of packet loss in wireless networks is considered and described in the paper. An introduction to the main causes of the problem are described first. Then the behaviour of different wireless protocols (Wlan, ZigBee, WirelessHART) is presented and described. Some possible techniques to reduce the effects of packets loss in a wirelessHART networked control system are analyzed in the la...

We propose a method for the concealment of frame erasures in packet switched speech communication systems such as Voice over IP that is particularly tailored to the case of wireless transmission. At the receiver, the concealment algorithm is assisted by specific side information that is communicated via a steganographic channel within the bitstream of the employed speech codec. An exemplary imp...

To support quality of service over the Internet, the Differentiated Services model has been proposed recently by the IETF. In the Differentiated Services model, ¤ows with similar QoS requirements are aggregated into classes in order to counter the scalability problem faced by the Integrated Services model. There have been several models proposed for service differentiation. The relative differe...

Internet Protocol is used as a communication platform for Voice over Internet Protocol (VoIP). Before the transmission of VoIP it is required to do signal processing for reliable & efficient performance over the computer and the communication platform.Speech quality is critically important to update the service. Signal quality gets deteriorated at network layer due to problems like delay, jitte...

This paper studies loss performance of optical burst switching (OBS) with assembled burst traf£c input by exploring the characteristics of assembled burst traf£c. We analyze the smoothing effect of assembly algorithms, which changes the statistical properties of packet ¤ows, and £nd that assembly algorithms smooth the short range burstiness in packet traf£c and thus enhance the loss performance...

The central result of this paper is an analytic formula describing the packet loss probability in a buffer as a function of the length of the buffer and the probability of external packet loss. This formula makes it possible to calculate the total loss along a multi-buffer, multi-link route. Also, new types of congestion window distributions are discovered when the packet loss in the buffer is ...

The effect of packet loss on the quality of real-time audio is significant. Nevertheless, Internet measurement experiments continue to show a considerable variation of packet loss, which makes audio error recovery and concealment challenging. Our objective is to predict packet loss in real-time audio streams based on the available bandwidth and delay variation and trend, enabling proactive erro...

In the existing system, the problem of TCP in MANET’s environment is packet losses induced by network congestion. In case if congestion occurs it leads to the loss of data. In the proposed system, Blue algorithm is used for avoiding packet loss in TCP with wireless network based on checking size of queue. If the size of queue is maximum, gateway directly forwards the packet to destination throu...

The perceptual quality of VoIP conversations depends tightly on the pattern of packet losses, i.e., the distribution and duration of packet loss runs. The wider (resp. smaller) the inter-loss gap (resp. loss gap) duration, the lower is the quality degradation. Moreover, a set of speech sequences impaired using an identical packet loss pattern results in a different degree of perceptual quality ...

In this article, we propose a novel loss recovery algorithm of transmission control protocol (TCP) using packet transmission order, which shows a steady loss recovery ability even though packet loss rate increases. This leads to a significant throughput increase of TCP with heavy packet loss. We have verified the performance increase of the new TCP under various environments such as a wireless ...