The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
A Wireless cellular Ad-hoc network is a collection of wireless mobile hosts that makes a momentary network with or without a centralized management or wired infrastructure. This is the era of growing smart phone technology people are dependent on the service provided by phone so in this scenario providing quality of service is essential task for service providers. Smart phone is movable device user...
The sensor network consist of multi-purpose of node in a scarred networks area. The modern motes that have multiple sensor board on a single radio board, which have different type of transmission rate, required bandwidth, packet loss, delay demands etc. In this paper we proposed Heterogeneous Congestion Control Protocol(HCCP), which controls the efficient rate for heterogeneous traffic. This protocol...
We present a performance study of a wireless mesh network based on off-the-shelf 802.11 technology. Unlike earlier work, we explore the practical constraints of the use of a “vanilla”, unmodified 802.11 MAC layer. We also consider the use of multiple radios, in the 5GHz band, to reduce interference. We establish the origin of degradation and limits in performance of practical deployments and study...
Popular wireless network standards, such as IEEE 802.11/15/16, are increasingly adopted in real-time control systems. However, they are not designed for real-time applications. Therefore, the performance of such wireless networks needs to be carefully evaluated before the systems are implemented and deployed. While efforts have been made to model general wireless networks with completely random traffic...
It is difficult to provide QoS guarantees for streams in wireless network based on IEEE802.11 DCF because of limited bandwidth. Taking CBR traffic as example, we studied the traffic performance with different parameters in this paper. The results show that for an overloaded network, the traffic with longer packet size has greater throughput. Since the MAC layer performs the same competitive algorithm,...
With the rapid development of network technology and network services, the users' requirements of network QoS are also improved. The traditional Active Queue Management(AQM) mechanisms are not adequate to provide QoS guarantee to multimedia video traffics effectively. To provide better quality of service to the multimedia applications in Mobile Ad Hoc Network(MANETs), whose resource is limited and...
Algorithms to provision backhaul traffic flows in an infrastructure Wireless Mesh Network (WMN) with near minimal delay and jitter and near-perfect QoS are described. The WMN consists of Base-Stations with multiple radio transceivers for backhauling, and one or more Gateway BSs. It has recently been established in theory that a recursive fair stochastic matrix decomposition algorithm can be used to...
This paper describes an adaptive scheme for Call Admission Control (CAC) for multi-class service wireless cellular networks. The proposed CAC scheme can be achieved through call bandwidth borrowing and call preemption techniques according to the priorities of the traffic classes, using complete sharing of the available bandwidth. However, the CAC scheme maintains QoS in each class to avoid performance...
In next generation wireless networks, great challenges have been posed to provide mobile multimedia services with QoS guarantees. Since bandwidth is a scarce resource in wireless networks, effective management of the limited radio resources is important to enhance the network performance. In this paper, we propose an adaptive and dynamic resource reservation and call admission control (CAC) strategy...
Monitoring is a crucial task in QoS-aware networks since it provides statistics to verify that the network performs within the committed QoS parameters. It is especially important in a resource-constrained Carrier-grade Wireless Mesh Access Network (CG-WMAN) in order to monitor a node's neighborhood, established links as well as MPLS QoS-traffic flows, so-called Label-Switched Paths (LSPs). In this...
Access networks based on cooper cables are costly to build and maintain. For this reason, last-mile access networks based on wireless technologies are gaining considerable attention. Among the wireless technologies being employed, the IEEE802.11 is common place. In such scenarios it is important to have well defined mechanisms to better evaluate traffic characteristics and overall system performance...
This paper investigates the performance of exponential/proportional fair (EXP/PF) and maximum-largest weighted delay first (M-LWDF) scheduling algorithms in the third generation partnership project long term evolution (3GPP LTE) providing packet-switched multimedia services. It, then, identifies a suitable packet scheduling algorithm on a basis of their performance evaluation. The performance evaluation...
This paper addresses the important issue of how to optimize the performance of the current mobile backhaul radio access network (RAN) infrastructure to cope with the growing and dynamic nature of the emerging data-centric mobile multimedia traffic and services. Specifically, this work proposes and devises a simple and cost-effective EPON-based dynamic multiservice RAN architecture that efficiently...
In a wireless mesh network (WMN), mesh clients (MCs) access the Internet through the wireless backbone formed by the Internet Gateways (IGWs) and Mesh Routers (MRs). An IGW as the traffic center may easily become the congestion center in a WMN. The load balancing between IGWs will reduce the traffic congestion thereby improving the network performance and providing a better quality of service (QoS)...
This paper reports on the results of service performance in FON network - Wi-Fi network where each hotspot has its owner, Fonero, who has priority in service, and the right to grant access to the limited number of visitors of his hotspot. Simulation model developed assuming that users in FON behave similar to the users in Wi-Fi, and taking into account service priority of Fonero. Results of simulation...
We propose a game-theoretic framework for quality-of-service (QoS) aware resource competition among coexisting wireless links in mobile wireless networks. The senders of wireless links use the constant transmit power and then the wireless resources of interest is characterized by time-slot length. Multiple wireless links will use the limited wireless resources through a time-slot competition game...
Real-time multimedia traffic requires some minimum delivery guarantees to be effectively transmitted over packet-switched networks. This is even more necessary when interactive sessions (e.g., voice-over-IP applications) are involved. Effective and timely packet delivery is sometimes achieved by overdimensioning network capacity. However, this is not the most practical and economic solution. Instead,...
In recent years, voice over Internet Protocol (VoIP) has gained much attention in wireless local area networks (WLANs). Although IEEE 802.11e has been standardized to provide voice traffic with quality of service (QoS) support, the voice quality will still be severely degraded with a large amount of best-effort traffic generated by distributed coordination function (DCF) or enhanced distributed channel...
Many next generation applications (such as video flows) are likely to have associated minimum data rate requirements to ensure satisfactory quality as perceived by end-users. While there have been prior approaches on supporting quality-of-service (QoS) in mesh networks, they have largely ignored the issues that arise due to self-interference, the interference between different link layer transmissions...
Various solutions based on both prioritization and resource allocation have been proposed in the literature and standard bodies to support end-to-end quality of service (QoS) in wireless multihop scenarios. However, their performance is not satisfactory in terms of achievable overall network throughput and tradeoff between end-to-end delay and network utilization. This paper proposes time-driven access...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.