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This revision specifies technical corrections and clarifications to IEEE Std 802.11 for wireless local area networks (WLANS) as well as enhancements to the existing medium access control (MAC) and physical layer (PHY) functions. It also incorporates Amendments 1 to 10 published in 2008 to 2011.
A mechanism for prioritization of management frames is provided and a protocol to communicate management frame prioritization policy is specified in this amendment.
The following topics are dealt with: wireless communications and networking WCN/WLAN/WiMAX; optical communications and networking OCN; mobile communications/wireless/mobility; mobile ad-hoc and sensor mesh networks; network management and services; UWD/RFID/OFDM and Nano/Bio, and; quality of service, traffic management and dynamic spectrum access networks.
In recent days, optical fibers have been developed as a transmission medium to carry traffic in order to provide various services in telecommunications platform. Failure of this fibre caused loss of data which can interrupt communication services. Thus, this paper will focus about protection scheme in order to guarantee the survivability of the networks. Besides, the scheme should provide better quality...
Nowadays, mobile communication has become an essential for the human life. On the other hand, there is a booming in the developed technologies. So, the operators are facing a lot of problems for best utilizations of the operation of coexisting radio access technologies (RATs) that they may have. The RAT selection algorithm is one of the key research areas in Common Radio Resource Management (CRRM)...
This paper presents a novel customer QoE improvement method. The method which aims at satisfying the customer demand, shields the heterogeneous networks making the impact on the operation support capacity in the converged network environment. Based on the method, through extracting, packaging and proposing the OSS service enabler-OSE, the OSE proposing platform is built on managing the customer service...
Wireless Sensor Networks (WSNs) have inherent and unique characteristics rather than traditional networks. They have many different constraints, such as computational power, storage capacity, energy supply and etc. Energy aware routing protocol is very important in WSN, but routing protocol which only considers energy has not efficient performance. Therefore considering other parameters beside energy...
Femtocells are an inexpensive solution to address weak indoor cellular coverage. Femtocells increase network coverage, offloaded macro cell sites, and provide high data rate services in a cost-effective manner. However, several aspects of this new technology are ambiguous or not defined in standard, such as QoS architecture, bandwidth request management and subscribers flows priority. This paper provides...
The femtocell deployment in 3GPP/LTE sets new challenges to interference mitigation techniques and Radio Resource Management (RRM). Traditional schemes are mainly designed for classical cellular networks while the ad hoc nature of femtocells notably limits the complexity of possible algorithms. Thus, efficient RRM schemes are essential for limiting the interference impact on end-user performance....
Radio resource management (RRM) is widely regarded as a critical component in improving spectral efficiency of beyond third generation (3G) cellular air interfaces. Much of the published work in Orthogonal Frequency Division Multiplexing (OFDM) RRM focuses on exploiting multi-user, multi-channel and multi-application diversity. In this paper, we propose a Quality of Service (QoS)-aware bit scheduling...
The dynamic and shared nature of wireless medium imposes an adverse barrier to supporting QoS for video streaming applications in wireless networks. In this paper, we investigate a case study of video streaming in a wireless mesh network to obtain important observations on the factors which impact video quality in multihop wireless mesh networks. Based on our analysis of the case study, we propose...
We examine whether wireless ISPs should be able to legally limit the applications used on wireless devices. The analysis is based on wireless network architecture and communications law. We review how wired and wireless networks differ in traffic management, and conclude that wireless networks require stronger traffic management than wired networks at and below the network layer. We review communications...
One of the major concerns of cognitive radio, is to be flexible and dynamic enough to, on one hand, minimize interferences with primary users, and on the other hand, guarantee the requested Quality of Service (QoS) level for cognitive transmissions. This paper addresses the problem of Spectrum Hole reassignment (SH reassignment) when the primary user reutilizes the frequency band. For that purpose,...
Policy-based management is considered an effective approach to address the challenges of resource management in large complex networks. Within the IU-ATC QoS Frameworks project, a policy-based network management framework, CNQF (Converged Networks QoS Framework) is being developed aimed at providing context-aware, end-to-end QoS control and resource management in converged next generation networks...
In this work, we illustrate our experiences on activities about monitoring of the User Quality of Services (QoS) measurement campaigns. We show the network architecture that has been implemented to achieve QoS tests on all Italian users. Such a network permits to achieve a detailed investigation on the network causes that induce performance degradation and, therefore, it can be assumed as a basis...
Video traffic over cellular and broadband wireless access networks has been rapidly increasing in the recent years. To ameliorate the effect of this increase at wireless bottleneck links, we design and implement the first farsighted flow management framework, called MESA. During periods of network overload, MESA attempts to maximize the long-term quality of experience for each user. MESA has three...
The demand for higher data rates, capacity and better quality-of-service is constantly growing for home networks. Therefore, there is a pressing need for efficient use of wireless network resources. In this context, the application of cognitive radio principles that enable network nodes to characterize their environment and control their resources based on the acquired knowledge, is the prominent...
Delivering desired QoS to the applications is one of the most important challenges in next generation networks. Designing efficient queue management in midway nodes leads to improvement in NGN efficiency. This paper presents fair Efficient active Queue Management (EQM) mechanism for congestion avoidance and control in next generation networks. Proposed AQM mechanism uses instantaneous queue length...
A method and system design of controlling user's traffic in broadband access segments to enhance fairness among users are proposed and demonstrated. A proposed bandwidth control system utilizes QoS-related functions of existing heterogeneous access equipments, and provides a mechanism for maintaining bandwidth assignment based on each user's profile and usage.
Mobile WiMAX's scheduling service is a key factor in Radio Resource Management (RRM) in realizing Quality of Service (QoS). The choice in scheduling algorithm for Mobile WiMAX base stations, albeit outside of the scope of the standard, critically impacts the performance and robustness of Mobile WiMAX networks. This paper provides an in-depth study of four major scheduling algorithms: Round Robin (RR),...
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