Since the introduction of digital television, new services such as Video on Demand and IPTV have been widely deployed. These new enhanced video services are usually delivered via streaming technologies over IP-based networks to set-top boxes (STB). Unfortunately, such networks are commonly referred to as packet-based best-effort networks that cannot guarantee the correct delivery of the transmi...

We study and analyze the behavior of Hubnet. A simulation model is developed from which the effect of the retry time on the performance of Hubnet is studied. Results show that increasing the retry time does not always mean higher delay. We show that, for retry time values that are less than and are factors of the packet length, the mean delay is better than some lower retry time values subject ...

For robust real-time transmission of scalable image and video data over packet-loss networks, a commonly used approach is FEC-based multiple description coding, which protects a scalable bitstream with a fixed number of packets of equal length. In this paper, by considering the problem of applying this approach of multicasting a source to a collection of clients with heterogeneous bandwidths, w...

Abstrnct In this paper, we design a novel fuzzy controller to dynamically adjust the packet length to against the interference from microwave oven over the IEEE 802.11 FHSS (Frequency Hopping Spread Spectrum) wireless LAN card. The idea of adjusting the packet length under the noise environment is referring from the measurement results about the effects of microwave ovens over the wireless LAN ...

In this paper a novel adaptive bandwidth allocation scheme called Prudent Creditization Polling (PCP) is proposed and adapted with the reservation protocol IPACT. PCP attempts to reduce the average queue length at the ONUs and the average packet delay throughout the network. At each polling period, PCP attempts to creditize the request of the ONUs that suffer from high RTT, high average delay p...

This paper applies a matrix-analytic approach to analyze both the long-term and the short-term loss behaviors of a queue with space priority scheme. Five related performance measures are derived from conditional statistics, including the long-term highpriority and low-priority packet loss probabilities, and the three short-term measures — the average length of a critical period, the average len...

the establishment as well as the survival of mobile ad-hoc networks relies on the cooperation of nodes for performing network operations such as routing and packet forwarding. in these networks, misbehaving nodes can severely degrade network’s performance by not cooperating in networking operations. in this paper, we study the issue of node misbehavior in packet forwarding. to counter this type...

Last years, Wavelet Packet Modulation (WPM) or Wavelet Packet Transform based Orthogonal Frequency Division Multiplexing (WPT-OFDM) have been introduced to wired and wireless communication fields as efficient Multicarrier Modulation (MCM) techniques. The wavelets have interesting features such as flexibility, compatibility and localization in both time and frequency domains with no need to use ...

The minimum length of the data field of a packet sent over an Ethernet is 1500 octets, thus the maximum length of an IP datagram sent over an Ethernet is 1500 octets. Implementations are encouraged to support full-length packets. Gateway implementations MUST be prepared to accept full-length packets and fragment them if necessary. If a system cannot receive full-length packets, it should take s...