The paper addresses a situation, when universal mobile telecommunication system (UMTS) network gets congested as a result of a catastrophe or an accident involving many people. The scenario of the situation and objectives for the network during the congestion are defined. Finally, two simple resource management algorithms useful in this case are compared. Their performance, when used separately...

Traffic congestion in road networks is one of the main issues to be addressed, also vehicle traffic congestion and monitoring has become one of the critical issues in road transport. With the help of Intelligent Transportation System (ITS), current information of traffic can be used by control room to improve the traffic efficiency. The suggested system utilize technologies for real-time collect...

This document describes a possible congestion control mechanism for acknowledgement (ACKs) traffic in TCP. The document specifies an end-to-end acknowledgement congestion control mechanism for TCP that uses participation from both TCP hosts: the TCP data sender and the TCP data receiver. The TCP data sender detects lost or Explicit Congestion Notification (ECN)-marked ACK packets, and tells the...

As traffic patterns and network topologies become more and more complicated in current enterprise data centers and TOP500 supercomputers, the probability of network congestion increases. If no countermeasures are taken, network congestion causes long communication delays and degrades network performance. A congestion control mechanism is often provided to reduce the consequences of congestion. ...

The Slow Start (SS) phase at the beginning of a TCP connection affects the performance of short transfers especially on long delay links such as Satellite Links. Many works have tried to improve the performance of this phase either by accelerating the congestion window increase or by setting the SS threshold at the beginning of the connection to a more accurate value in order to avoid losses an...

This document specifies Non-Congestion Robustness (NCR) for TCP. In the absence of explicit congestion notification from the network, TCP uses loss as an indication of congestion. One of the ways TCP detects loss is using the arrival of three duplicate acknowledgments. However, this heuristic is not always correct, notably in the case when network paths reorder segments (for whatever reason), r...

We believe that the emergence of congestion control mechanisms for relatively-smooth congestion control for unicast and multicast traffic can play a key role in preventing the degradation of end-to-end congestion control in the public Internet, by providing a viable alternative for multimedia flows that would otherwise be tempted to avoid end-to-end congestion control altogether. The design of ...

In this paper, we discuss a cross layer congestion control technique of TCP Reno-2 in wireless networks. In this both TCP layer and PHY layer jointly control congestion. The PHY layer changes transmission power as per the channel condition, interference received and congestion in the network, whereas the TCP layer controls congestion using Reno-2 window based flow control. Our simulations show ...

In this paper, we propose a two-layer model for TCP traffic with burstiness effect. We show that the backlog in bottleneck queue is bounded by the sum of two components: the long term effect of congestion window control algorithm and the short term effect of burstiness. This motivates a formal definition of burstiness. A simple algorithm is proposed to measure and control burstiness at the send...

In Wireless Sensor Networks (WSN's), congestion plays an important role in degrading the performance of the network. Under idle condition, the network load is very low whereas when an event is detected the network load becomes high which leads to congestion. Due to congestion the overall performance of the network degrades. Hence it is necessary to detect and control congestion. In this pa...