This paper proposes an add-on to the well known RED (Random Early Detection) algorithm called RED+. RED+ adds the functionality of identifying and discriminating high-bandwidth, unfriendly best-effort flows to RED gateways. It is based on the observation that unfriendly flows have higher arrival rates in times of congestion than friendly flows. Hence unfriendly flows can be discriminated if pac...

Interaction between Transmission Control Protocol (TCP) and Random Early Detection (RED) gateways can be captured using dynamical models. The communication network is viewed as a discrete-time feedback control system where TCP adjusts its window size depending on whether or not it has detected a packet loss during the previous round trip time (RTT) interval. In this article, we describe a discr...

According to the past researches, a TCP Vegas version is able to achieve higher throughput than TCP Tahoe and Reno versions, which are widely used in the current Internet. However, we need to consider a migration path for TCP Vegas to be deployed in the Internet. By focusing on the situation where TCP Reno and Vegas connections share the bottleneck link, we investigate the fairness between two ...

Active queue management schemes like RED (Random Early Detection) have been suggested when multiple TCP sessions are multiplexed through a bottleneck buffer. The idea is to detect congestion before the buffer overflows and packets are lost. When the queue length reaches a certain threshold RED schemes drop/mark incoming packets with a probability that increases as the queue size increases. The ...

This paper presents a Di€erentiated Services (Di€serv or DS) architecture for multimedia streaming applications. Speci®cally, we de®ne two types of services in the context of Assured Forwarding (AF) per hop behavior (PHB) that are di€erentiated in terms of reliability of packet delivery: the High Reliable (HR) service and the Less Assured (LA) service. We propose a novel node mechanism called S...

The congestion control mechanisms of TCP make it vulnerable in an environment where flows with different congestionsensitivity compete for scarce resources. With the increasing amount of unresponsive UDP traffic in today’s Internet, new mechanisms are needed to enforce fairness in the core of the network. We propose a scalable Diffserv-like architecture, where flows with different characteristi...

With the increase in the number of internet users in recent times. Users are obsessed with multimedia applications available on internet, so put tremendous load on network. But network should maintain a good QoS (Quality of Service) to provide satisfactory results to the user. As congestion increases, it affects the performance of network and it tries creating imbalance. To avoid congestion man...

Keywords: Random early detection (RED) Active queue management (AQM) Stability Hermite matrix Congestion control a b s t r a c t One main TCP congestion control objective is, by dynamically adjusting the source window size according to the router queue level, to stabilize the buffer queue length at a given target , thereby achieving predictable queueing delay, reducing packet loss and maximizin...

Internet over the past few years has undergone dramatic changes in terms of scale, penetration rate and the diversity of applications. The demand for continuous network connectivity is profilerating. Moreover, it has been observed that the usage of real time applications like Voice over IP (VoIP) and Live Streaming has increased drastically. Passive Queue Management (PQM) mechanisms in the rout...

Active queue management policies and in particular Random Early Detection RED are being advocated by the Internet Engineering Task Force IETF as additional mechanisms in Internet routers to control congestion and keep network utilization high RED s performance is highly dependent on the settings of its ve control parameters However no rm guidelines exist on con guring RED parameters and the cur...