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The problem of providing an efficient and low-cost video streaming service over wireless access networks is considered in this work. The usage of multicast content delivery combined with popularity-based video caching, enables to provide video-on-demand services over wireless networks. In order to tackle the "last mile" bottleneck for video delivery to the home, we propose a content-aware...
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...
The widespread use of heterogeneous wireless network technologies and their integration with multi-mode terminals enable users to be associated to the best available networks according to user preferences and application specific requirements. We study a user-centric quality of experience based resource allocation problem with several operators, several types of users and different classes of services...
Future wireless system is the convergence of multiple techniques and standards, thus to provide ubiquitous access. REALISM (REconfigurable Adaption Layer for Integrated System) is proposed to operate each independent network and form the universal platform based on the simple exchange of protocols and signaling. By developing REAL (REconfigurable Adaption Layer) embedded in protocol stack, REALISM...
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)...
Provisioning of guaranteed Quality of Service (QoS) in next generation cellular networks has become a great challenge specially, when the wireless access networks have been used to deliver the multimedia services. Call Admission Control (CAC) is one of the most important components of Radio Resource Management (RRM) that affects the provided bandwidth utilization efficiency and QoS guarantees. In...
In the next generation heterogeneous wireless networks, a user with a multi-interface terminal may have network access from different service providers using various technologies. Vertical Handover (VHO) is the capability to switch on-going connections from one Radio Access Network (RAN) to another. This switching is based on the discovered accesses, QoS constraints, operator policies, user preferences...
This paper proposes a handover scheme supporting Multi-Protocol Label Switching (MPLS) in a Proxy Mobile IPv6 (PMIPv6) domain that improves the mobility and gives Quality of Service (QoS) and Traffic Engineering (TE) capabilities in a mobile MPLS access network. The proposed scheme takes advantage of both PMIPv6 and MPLS. PMIPv6 was designed to provide Network-based Localized Mobility Management (NETLMM)...
In this paper, we discuss the functionality of mobile systems in a new generation network. Our goal is to provide mission-critical services using the mobile systems in the fields such as energy, disaster prevention, and medical care. It is necessary to guarantee both reliability and quality of communication for these services. We show that the future mobile systems should have three functions for...
Designing a heterogeneous network including systems providing different QoS, such as the emerging WiMAX, is a difficult task. The integration of a WiMAX access system with Differentiated Services (DiffServ) enhances the overall performance of the network. This paper investigates the interworking between WiMAX and DiffServ networks, by measuring one-way delay, jitter and packet drop rate of VoIP traffic...
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...
Recently mobile IPTV service becomes primary service to boost sluggish IT industry. SVC service seems to be prominent to satisfy the QoS/QoE in broadcasting service. Especially in multi-screen service, there are many different type of terminal. Therefore contents operator will apply SVC coding scheme to provide appropriate quality of image to users according to multi-terminal type. In order to provide...
We consider the distributed scheduling problem in a wireless multiple access communication network system that requires no coordinator or access point. In many WLAN / WPAN standards, the coordinator in the infrastructure mode is used to provide contention free access to support Quality of Service (QoS) of certain applications (e.g., audio/video streaming). In the absence of a coordinator, contention-free...
This paper focuses on the problem of coherent resource allocation within home and access networks. The interdomain QoS signaling discussed here enables the initiation of the QoS provisioning in the home and access from the end device in users home. The home network considered in this paper is UPnP-QoS enabled while the access network is GMPLS based. We propose and implement an interface between aforementioned...
In heterogeneous wireless network environment, various radio access networks (RANs) are available for mobile terminals which have multiple wireless network interfaces to connect to each different RAN. However, it is very difficult to improve the throughput by aggregating different RANs, which have different quality of service (QoS) in the throughput, the delay, the packet loss, and so on. In this...
In this paper, we investigate a channel selection algorithm based on temporal characterization of spectrum holes. This algorithm is conceived to be implemented within a decentralized Radio Resources Management operation where decision making processes are executed at the mobile terminal side. Different scenarios are considered to test the effectiveness of this algorithm in improving the spectrum efficiency.
The integration of Ethernet Passive Optical Networks (EPONs) and IEEE 802.16 (WiMAX) has been lately presented as a promising fiber-wireless (FiWi) broadband access network. Conversely, lightweight layer-2 virtual private networks (VPNs) over FiWi, which can provide bandwidth guarantee to the respective users, were only recently addressed by Dhaini et. al. In this paper, WiMAX-VPON, the framework...
Fiber-wireless (FiWi) access mesh networks have been proposed as flexible and cost-effective solutions for future access networks. However, for FiWi access mesh networks to provide end-to-end QoS guarantees to its customers, efficient QoS routing schemes and scheduling policies become necessary. Here we provide a model, using repeated game theory, that creates ground for scheduling policies to be...
Ethernet Passive Optical Network (EPON) was proposed to overcome the bandwidth bottleneck at the Access Networks due to its simplicity, cost effectiveness and wide spread deployment. The architecture in access networks can affect the system performance, because access networks transmit aggregated high-speed traffic from hundreds of subscribers. Dynamic bandwidth allocation (DBA) mechanisms have been...
The convergence of EPON and WiMAX is one promising solution for Fiber Wireless access network, QoS is an important technical issue for hybrid access network. We propose a novel QoS scheme of EPON and WiMAX integrated network based on unified QoS management which has been implemented and proved its effectiveness.
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