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The network-centric CAC schemes try to do resource reservation into networks for mobile connections, observing network status only. This approach can be appropriate for non-real time traffic, but for real-time applications, hasn't showed good results. In this paper, we introduce the PI-CAC, a user-centric L3 CAC scheme, based on user quality of experience for integrating WLAN and 3G networks, with...
The mobile cellular systems are expected to support multiple services with guaranteed Quality of Service(QoS). But, the ability of wireless systems to accommodate expected growth of traffic load and broadband services is limited by available radio frequency spectrum. Call Admission Control (CAC) is one of the resource management functions, which regulates network access to ensure QoS provisioning...
The following topics are dealt with: wireless communications; wireless networks; networks convergence; social mobility; mobile technology; wireless technology; protocols; mobile network deployment; cognitive vehicular networks; cooperative networks; security; spectrum allocation; radio interfaces; traffic and congestion control; QoS; and resource management.
The mobile cellular systems are expected to support multiple services with guaranteed Quality of Service(QoS). But, the ability of wireless systems to accommodate expected growth of traffic load and broadband services is limited by available radio frequency spectrum. Call Admission Control (CAC) is one of the resource management functions, which regulates network access to ensure QoS provisioning...
The Next generation wireless network (NGWN) will be heterogeneous in nature where different radio access technologies (RATs) operate together .The mobile terminals operating in this heterogeneous environment will have different quality of service requirements to be handled by the system. The radio resource management is one of the key challenge in NGWN. Call admission control is one of the radio resource...
The global demand for Internet access services has increased at a notable rate in recent years. The quality of service (QoS) of several real time multimedia applications has become a crucial research topic. One of the challenges to achieve QoS requirements is to determine how to allocate system bandwidth to various applications with the respect of their QoS requirements. In this paper, we proposed...
The imminent growth of user-centric, pervasive sensing environments promotes sink mobility in an increasing number of event-based, sensor network applications including rescue missions, intrusion detection, and smart buildings. In these settings, one of the most critical challenges toward supporting quality of service, is effective distributed congestion avoidance. Congestion control techniques have...
This paper gives a theoretical approach to modeling and simulating the Grade of Service (GoS) of Voice over Peer-to-Peer Session Initiation Protocol system which is created based on various teletraffic parameters. VoP2P features a particular service characteristic due to its different GoS models originated from circuit switched telephone networks. Especially, most voice session in VoP2P is indirectly...
The mobile cellular systems are expected to support multiple services with guaranteed quality of service (QoS).But, the ability of wireless systems to accommodate expected growth of traffic load and broadband services is limited by available radio frequency spectrum. Call admission control (CAC) is one of the resource management functions, which regulates network access to ensure QoS provisioning...
We propose a new framework called dynamic adaptive quality of service (DAQoS) to guarantee the quality of service (QoS) of multimedia traffic generally classified as Constant Bandwidth Service (CBS) and variable Bandwidth Service (VBS). DAQos implements a traffic-based admission control, bandwidth reallocation and reservation schemes to support multimedia traffics. The objectives that DAQoS framework...
In a nearby future wireless networks will run applications with special QoS requirements. FHMIP is an effective scheme to reduce Mobile IPv6 handover disruption but it does not deal with any other specific QoS requirement. Therefore new traffic management schemes are needed in order to provide QoS guarantees to real-time applications and this implies network mobility optimizations and congestion control...
The adaptive network selection, efficient resource management, call admission control (CAC) strategies in mobile WiMAX must consider the characteristic of multi-rate to reduce the call blocking probability (CBP) and call dropping probability (CDP). In this paper, we propose a hierarchical network selection strategy (HNSS) based on grey relational analysis (GRA) to switch to the proper base station...
Call admission control plays a significant role in the provisioning of differentiated Quality-of-Service (QoS) to new calls and handover calls in wireless mobile networks. Due to its cost-effectiveness, the Guard Channel (GC) call admission control scheme has been widely deployed. Existing studies on modelling and analysis of this scheme have been usually focused on the working conditions where both...
A new kind of wireless network dynamic rate handoff algorithm based on LBS (location-based services) information is presented in this paper. We judge the forthcoming data handoff call and reserve channels for data handoff traffic on the basis of LBS information and signal change vector. The results of the simulation show that call drop probability (CDP) reduces, utility probability increases, and...
Nowadays, wireless network users demand support for different types of traffic combined with longer battery lifetime for their mobile devices. This work proposes a new medium control for wireless LANs as an alternative to the HCF (hybrid coordination function) scheme defined by the IEEE 802.11e workgroup. LEPOHA (low energy priority oriented hybrid access) is a complete medium access mechanism, it...
In this paper, we propose a new connection admission control (CAC) algorithm accommodating various classes of traffic, which can easily be implemented in mobile WiMAX system. The proposed CAC algorithm has three characteristics: first, the variation of air capacity is taken into account by measuring the distribution of modulation and coding scheme (MCS) levels offline; second, we estimate the mean...
This paper presents a method of predicting changes of power consumption at Node B of a wideband code division multiple access (WCDMA) mobile network due to dynamic resource allocation such as movement of unit equipment (UE), handover call from adjacent cell and accommodation of new service request. The method learns the mapping of power consumption at Node B by monitoring power changes that response...
For real-time traffic requirements in mobile ad hoc networks a novel and effective QoS admission control routing protocol (QACRP) is proposed in this paper. With a limit amount of extra overhead, QACRP can avoid network congestion by a simple and precise admission control to block most of overloading flow-requests in route discovery process. System simulations show that this proposed scheme can increase...
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