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In recent years, the usage of data is more than available resources. Due to fast growing requirements and development of the green communication technology may lead to go for many energy saving designs in networks, the faster growing network is LTE(4G), which is going to give more traffic, because of the user requirements, so the issues in the mobile networks are (1) traffic in networks (2) more energy...
Integration of different network services into a converged infrastructure is one of the most intensive challenges in the converged network application development area. Huge differences exist regarding several characteristics of data, voice and video content traffics. While data traffic requires error free services, real time applications like interactive video transfer and VoIP distress of the high...
Congestion control is vital in the streaming of a video sequence or clip, as network traffic varies unpredictably requiring constant adjustment of the transmission rate. Standard TCP-Friendly Rate Control (TFRC) wastes bandwidth and may react to congestion only when packet loss has already occurred. This paper presents a unicast transport protocol named RRB-SIMD for video streaming over the Internet,...
Increasing demands of ubiquitous services in wireless networks and evolution towards heterogeneous solutions has driven the necessity of developing efficient QoS aware vertical handoff (handoff between different networks) mechanisms. This paper proposes a QoS aware fuzzy rule based vertical handoff mechanism that makes a multi-criteria based decision, found to be effective for meeting the requirements...
In fire fighting having prompt and reliable tracking and communication in case of emergency is of paramount importance. We developed an integrated positioning, sensing and communication platform for tracking first responders in urban fire fighting. A Quality of Service (QoS) enabled TDMA MAC (QT-MAC) was designed to provide a low latency and high reliability service for critical data transfer, as...
The constantly changing nature of network traffic means that scalable and programmable traffic management (TM) in the form of a queue manager (QM) is becoming vital for realizing quality of service (QoS) in next generation networks. Typical QM solutions are proprietary with fixed architectures and costly management of queues. In this paper, we present a new FPGA- based QM architecture which is able...
In order to improve reliability, feasibility, reducing duration of failure, the key is to improve reliability of system and control the time of Master-standby-switch process. This paper focuses on the two important processes of Cross-unit Master-standby-switch Technology, and Master-standby-switch process under the High-end router, and proposed Cross-unit Master-standby-switch Technology Model Based...
In Measurement Based Admission Control (MBAC), the decision of accepting or rejecting a new flow is based on measurements of the current traffic. Since MBAC relies on measurements, an in-depth understanding of the measurement error and how it is affected by the underlying traffic is vital for the design of a robust MBAC. The consequence of the measurement error is that flows are accepted in error,...
Currently, P2P application accounts for a majority of the network traffic. It is significant to study P2P recognition for network monitoring and management, as well as the improvement of service quality. There are many ways to identify P2P traffic, but it is difficult to identify effectively with only one method. To obtain the optimal classification, different methods should be used comprehensively...
Enterprise and service provider customers develop, maintain and operate network infrastructure in order to support the applications required to perform their day to day tasks. These applications have certain requirements and expectations from the infrastructure, including access to public networks, and thus rely on quality of service (QoS) controls to manage network traffic. QoS controls are used...
The handoff decision among heterogeneous wireless networks is a very important issue for integrating WLANs and cellular networks. Such networks exhibit different characteristics with respect to bandwidth, latency, power, and their charge model as well. In this paper, we present extensive numerical simulations of a novel vertical handover mechanism, which we proposed recently. We compare our mechanism...
Future metropolitan and access networks are expected to comprise both heterogeneous optical and broadband wireless technologies. In this paper, we envision and then investigate the architecture of one of these scenarios by assuming the WMN technology as a wireless access network and the PON technology to serve in the backhaul. In such a system, many of QoS issues need to be highlighted. A cell planning...
The design of a packet network where paths are dynamically selected based on Quality-of-Service (QoS) metrics that can be specified by the users of the network or by the network's access points will be presented. The approach uses on-line measurement associated with the traffic itself, and reinforcement learning throughout the nodes of the network, to try to satisfy the users' QoS objectives. The...
Flow convergence on particular nodes causes various problems such as degradation in QoS. We describe a new routing method for reducing the maximum number of relay flows on the node that relays maximum flows (called “the maximum number of relay flows”). A full search is required for calculating the optimal algorithm of this problem. Thus, we created an approximate algorithm to calculate a near optimal...
An analytic research on establishing different traffic models on the traffic nature of different time granularity can provide necessary academic foundation for network design and simulation as well as ensuring the quality of service and network management. This paper aims to make simulant predication by means of corresponding math tools on the modeling of real traffic of the different time granularity...
Distributed applications are often faced with a choice between improved throughput or improved reliability but not both. We argue that this is not a strict dichotomy and propose a framework that improves both application performance and reliability by adaptively adjusting source and channel coding parameters. For simplicity, we assume that the source and channel we work with are memoryless and in...
Flooding search is a basic searching scheme for unstructured peer-to-peer networks. This technique produces exponentially redundant messages in each hop. Subsequent growths of redundant messages will limit system scalability and will cause unnecessary traffic in network areas. To improve this searching scheme and reduce redundant messages, this paper proposed a novel algorithm (SmoothFlood) which...
IP Television (IPTV) is a new service that is growing up very quick in recent years. Its implementation is performed as a Triple-Play service, being the integration of voice, high-speed data and television. Moreover, the network traffic has been increased due to the use of VoIP, video or P2P. It is also creating congestion problems to the network provider and has high impact on the quality of IPTV...
Long range dependence (LRD) in network traffic is known for sometime. Numerous efforts have been made to model and analyze effect of such traffic on user experience, resource management etc. Buffer management is one of the key element of such resource management. It has long been established that LRD traffic causes higher buffer overflow probability and number of studies confirms this. Although, many...
In the original study based on the EDCA, the paper puts forward a concept of priority threshold to control traffics in a node. It makes EDCA mechanisms not only have the characteristics of priority, but also have good fairness. Among the nodes, optimized EDCA mechanism uses slot utilization to reflect the current network status, and changes the maximum and minimum contention window in order to improve...
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