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The AQM algorithm is based on the existing extensive and in-depth research, and it proposed a new active queue management algorithm-PFED (prediction-based fair early drop). The main objective of PFED is that the first network traffic can pass through a more precise forecast, and combined with the probability of packet dropping for more reasonable terms, so this will control the instantaneous queue...
Quality of service guarantees have attracted a lot of research interest in the past decade as real-time applications are sensitive both to delay and loss. Dynamic management of system parameters like bandwidth and buffer capacity allows to gain essential performance benefits while quality of service guarantees are met. Recently, a method of admission control based on measurements (MBAC) have received...
BitTorrent(BT)-like P2P traffic which occupy main network bandwidth affect other normal network applications badly. This paper presents a triggered dynamic mechanism for BT-like P2P bandwidth management. According to the variety of utilization percentage of egress router input/output cache, this mechanism could estimate the potential network congestion and be triggered to control the BT-like P2P bandwidth...
This paper presents a novel scheme called per-priority flow control (PPFC) as an extension to the IEEE802.3x standard using a simple and efficient node buffer management strategy, where a physical channel was divided into several virtual channel based on the bandwidth value (QoS parameter) embedded into the IPv6 flow label field of each flow. Moreover, it investigates performance of new proposed priority...
The capacity of a multi-hop wireless network is the traffic payload that it can transport. This is a prominent quality of service issue, particularly in the highly constrained settings of 802.11 wireless mesh network. In this paper, we consider two complementary definitions of the capacity. A network-wise capacity is defined as the sum of the upload traffic, and a flow- wise capacity highlighting...
In LTE Uplink, the slow varying pathgain and shadowing are compensated by the standardized open loop power control (OLPC) which is based on a power density offset and a compensating factor for the pathloss experienced by the users. The optimization of those parameters reveals a dependency on the allocated bandwidth. A Load Adaptive Power Control (LAPC) algorithm is proposed to handle the bandwidth...
Network designers face a challenging problem when trying to control the traffic entered into a wireless cellular network. The reason is the rapidly growing number of multimedia applications, combined with user mobility. Additionally, the existence of multiple cellular providers leads to strong competition among them. Providers need to use efficient resource management schemes in order to keep existing...
In NGN service-provisioning platforms the existence of an efficient and flexible admission control mechanism is essential for providing quality of service in a reliable and stable way, avoiding congestion scenarios caused by indiscriminate and uncontrolled service requests. The capability of modulating and regulating the rate of call acceptance, and provide service differentiation allow indirect control...
The resource of DTN (Delay Tolerant Network) is constrained and its links are unstable, so the states of network can't be fed back in time to the source node of data. The rate control mechanism and window mechanism of congestion control can't solve the congestion problem of DTN. The paper has proposed A DTN Congestion Control Mechanism Based on Distributed Storage (DCM). When the congestion of a DTN...
The steadily growing importance of Internet-based applications and their resilience requirements lead to a rising number of multi-homed sites. The idea of Concurrent Multipath Transfer (CMT) is to exploit the existence of multiple paths among endpoints to increase application data throughput. However, handling the congestion control of each path independently lacks of fairness against non-CMT flows...
The traditional loss based congestion control protocol is not suitable for media streaming. because the loss based congestion control can not limit the Round Trip Time and it is also too sensitive about one side congestion, while most ADSL links which often have an asymmetric bandwidth. So in this paper, we present a novel One-Way-Trip Time based congestion control protocol, and prove its performance...
We propose a novel pricing incentive mechanism supporting load balancing and allocating network resource efficiently for QoS-enabled networks. In this paper, we integrate the proposed pricing with QoS routing and present a novel pricing incentive mechanism meeting the QoS requirements of application. This mechanism provides a equitable pricing incentive for applications to according to their service...
Quality of Service (QoS) support for traffic plays an important role in Wireless Sensor Networks (WSNs). In WSNs, traffic is usually a mix of time-sensitive packets and reliability-demanding packets. Hence, admission control regardless of the characteristics of packets is not efficient. In this paper, taking both delay and reliability into account, we propose a novel admission control algorithm for...
In lossless interconnection networks congestion control (CC) can be an effective mechanism to achieve high performance and good utilization of network resources. Without CC, congestion in one node may grow into a congestion tree that can degrade the performance severely. This degradation can affect not only contributors to the congestion, but also throttles innocent traffic flows in the network. The...
Various studies have shown that regular TCP is inefficient in high-speed networks. This paper proposes F-TCP, a delay-based TCP variant, which is able to operate efficiently in high-speed networks. The slowstart phase of F-TCP continues until a threshold determined from probing the available bandwidth. When competing with loss-based flows F-TCP reduces it's window to a value derived from the available...
Authors propose to use cell level simulation as a natural follow up of the link level tests and a preliminary stage of the systematic approach to the system level tests in the context of IMT-Advanced candidates performance evaluation. The system under test (SUT) consists of flexible realizations of the WiMAX physical layer abstraction (providing customized fidelity and thus simulation complexity)...
In this note, we first give an overview of the economic and traffic conditions of residential broadband Internet access in the United states, with a focus on Comcast's multiple-priority approach to congestion control for its cable modem termination system (CMTS). We compare the Comcast framework to alternative proposals, including those based on usage based pricing and quotas. The security overhead...
The amount of information in real-time video monitoring is very large. So, the disk space is used largely, and the network congestion is easy to caused. In order to reduce the network congestion, save storage space, take out noneffective information in video, video key-frames are extracted in sending end and video is resumed in receiving end. A real-time video monitoring system is implemented. A kind...
Quality of Service (QoS) differentiation in WiMAX networks is a critically important part of QoS support that has not been properly addressed in the literature. Radio Resource Management (RRM) techniques such as packet scheduling and admission control have been studied by many research groups, and although they claim to provide QoS differentiation in their schemes, no studies have truly evaluated...
In ATM networks, due to the dynamic nature of the bursty traffic, severe network congestion may occur. Therefore, policing as the preventive congestion control is required for properly guaranteeing QoS. The leaky bucket control mechanism, which is the most widely and only implemented one, has some drawbacks. In this paper the principles of fuzzy logic are deployed to tackle the problem of congestion...
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