In this paper, a new Markovian model is developed to analyze the Packet Reservation Multiple Access (PRMA) protocol over Rician fading channels with lognormal shadowing. The packet dropping probability and the voice user capacity are defined as the performance measures. A new formula is derived to evaluate the dropping probability in the fading environment. The analytical results from our new f...

Active Queue Management (AQM) plays an important role in the Internet congestion control. It tries to enhance congestion control, and to achieve tradeoff between bottleneck utilization and delay. Random Early Detection (RED) is the most popular active queue management algorithm that has been implemented in the in Internet routers and is trying to supply low delay and low packet loss. RED al...

Mobile Ad hoc network [MANET] consists of mobile nodes without any fixed infrastructure, communicating through wireless medium. In MANET, Congestion occurs in any intermediate nodes when data packets travel from source to destination and they incur higher packet loss rate and long delay, which cause the degradations in performance of a network. Congestion can be controlled by Active Queue Manag...

Packet-switched non real-time data transmissions have increased a lot in the fixed network. Circuit-switched based cellular transmission techno logy Global System for Mobile communications (GSM) is already in the service for more than a decade. A packet based transmission system called General Packet Radio Services (GPRS) is developed for non real-time packet data transmission system by the evo...

InfiniBandTM Architecture (IBA) is envisioned to be the default communication fabric for future system area networks (SANs). However, the released IBA specification outlines only higher level functionalities, leaving it open for exploring various design alternatives. In this paper, we investigate four co-related techniques to provide high and predictable performance in IBA. These are: (i) using...

A wireless ad-hoc network is a temporary network set up by wireless mobile nodes moving arbitrary in the place that have no network infrastructure. Basically Wireless or mobile networks are evolved to replace the wired networks from traditional scenario to new paradigm. The mobile ad hoc networks are purely infrastructure less network. Due to this vulnerabilities of the network are unprotected ...