In this paper, we first investigate the performance of RED and the traditional TD (Tail-Drop) routers when there are more than 1000 TCP connections in the network, especially in term of fairness among connections. The result is that RED can achieve better fairness than TD when its control parameters are appropriately tuned according to the network condition. However, when the parameters are not...

In order to curtail the escalating packet loss rates caused by an exponential increase in network traffic, active queue management techniques such as Random Early Detection (RED) have come into picture. Flow Random Early Drop (FRED) keeps state based on instantaneous queue occupancy of a given flow. FRED protects fragile flows by deterministically accepting flows from low bandwidth connections ...

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...

In this paper, we propose ZL-RED (Zombie Listed RED) algorithm, which ehhances SRED algorithm to provide better fairness among many flows at the router buffer. ZL-RED uses the Zombie List, which is also used by SRED, to detect mis-behaving flows which send packets to the router at higher rate than the other flows, and sets larger packet discarding probability to those flows. We evaluate the eff...

Random Early Detection (RED), an active queue management scheme, has been recommended by the Internet Engineering Task Force (IETF) for the next generation routers. RED suffers from a number of performance problems, such as low throughput, large delay/jitter, and induces instability in networks. Many of the previous attempts to improve the performance of RED have been based on optimizing the va...

We introduce a novel and robust active queue management (AQM) scheme based on a fuzzy controller, called hybrid fuzzy-PID controller. In the TCP network, AQM is important to regulate the queue length by passing or dropping the packets at the intermediate routers. RED, PI, and PID algorithms have been used for AQM. But these algorithms show weaknesses in the detection and control of congestion u...

Random Early Detection (RED) can stabilize the queue within a given target range and thus achieve high throughput in the routers. However, the average queue size is quite sensitive to network scenarios and it is difficult to adapt RED parameters to changing network traffic. In this paper we use a previously developed dynamic model of TCP behavior and linear feedback model of TCP/RED to analyze ...

introduction: newborn hearing screening leads to the early detection of hearing impairment. the aim of screening is to decrease or remove the effect of hearing impairment on development of speech and language by timely diagnosis and effective treatment. a number of risk factors lead to delayed start of decreased hearing ability including: 1. congenital infection with cytomegalovirus  (cmv) viru...

how to cite this article: najafi r, hashemipour m, mostofizadeh n, ghazavi mr, nasiri j, shahsanai a, famori f, najafi f, moafi m. demographic and clinical findings in pediatric patients affected by organic acidemia. iran j child neurol. spring 2016; 10(2): 74-81. abstract objective metabolic disorders, which involve many different organs, can be ascribed to enzyme deficiency or dysfunction and...

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...