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Because of user mobility, highly dynamic, error-prone wireless channels, the QoS control for mobile Peer-to-Peer (MP2P) streaming media has to face considerable challenges. Given to the advantages of policy management, we develop a policy-based QoS control (PBQC) architecture to provide QoS assurance dynamically and automatically in mobile network environment. And we also propose a MP2P streaming...
It is heterogeneous wireless Networks (HWN) aggregation foundation for vertical handoff (VHO), and that is key characters of core technology for multi-network aggregation. The currently mechanism handoff trigger is analyzed, a best network selected (BNS) framework is designed, the parameters of network terminal and user terminal of effecting VHO algorithm, and which also include norm of capable parameters,...
Block diagonalization is a linear precoding technique which eliminates the multi-user interference at the transmitter side by creating parallel orthogonal single user links. In this technique, the transmit diversity order is fixed for each user and only power can be controlled to satisfy SINR requirements. This restricts the degrees of freedom available for resource allocation and limits the energy...
HSDPA (High Speed Downlink Packet Access) is drawing great attention as the 3.5G technology capable of providing higher data rate packet switch services over Universal Mobile Telecommunication System (UMTS) to support broadband services like multimedia conferencing, VoIP, or high-speed internet access. The paper proposes the use of a Learning Vector Quantization (LVQ) Neural Network able to estimate...
In this article, we are interested in improving the handover quality of Host Identity Protocol (HIP) in the case of micro mobility by (i) proposing the Local Rendezvous Server architecture as a first attempt to minimize the handover delay in the mobility process, (ii) introducing an adaptive early update mechanism to improve the handover quality during mobility by introducing early HIP (eHIP) and...
Inter-cell interference coordination (ICIC) is one of the key technologies in the multi-cell radio resource management of mobile systems. It plays a vital role in mitigating strong inter cell interference and guaranteeing proper quality of services for in-progress sessions. Because heterogeneous deployment is adopted in LTE-Advanced, and interference problem becomes serious. In this paper, we propose...
In this paper, we focus on practical issues when implementing sleep mode in base stations. Our aim being to reduce energy consumption without affecting the Quality of Service (QoS) perceived by users, we expose some problems that my occur when applying sleep mode and propose practical solutions to cope with the resulting QoS degradation. We namely consider activation time issue that may result in...
The rapid evolution of telecoms industry is accompanied by a huge increase of energy consumption of mobile networks, which forces the operators to exploit the potential of new techniques to save energy. In this paper, we propose a novel deployment strategy which is able to adapt itself to the spatial variation of the traffic by enhancing the cell radius in the low traffic areas, while the target quality...
SIP (Session Initiation Protocol) is standardized by Internet Engineering Task Force (IETF) as a signaling and control functionality for multimedia services (video and audio). However, SIP is a text-based protocol with messages usually exceeding several hundred bytes in size, thus causing high call set-up latency over low bit-rate links. As a consequence, SIP suffers from undesirable delay which is...
Recently, the demanding requirements and use for wireless communication are increased and continue to grow. WiBro is trying to compete with Wi-Fi in coverage and data rate, while the inexpensive Wi-Fi still very popular in both personal and business use. This paper designs and implements Fixed Mobile Convergence (FMC) terminal system supported IEEE802.11 b/g/n Wi-Fi and WiBro. Terminal system of this...
Mobile and nomadic devices such as cell phones and PDAs have evolved in recent years from resource constrained appliances to highly connected and increasingly powerful devices. This in turn has led to the development of standardized platforms most notably Windows mobile, Java micro edition, Android and the IPhone OS which enable third party developers to build applications fairly easy. Thanks to the...
In this paper, we present the design and the implementation of a test-bed for the Policy and Charging Control (PCC) system proposed in 3GPP TS23.203. Specifically, we use an IP multimedia call service example to demonstrate how to implement an advanced mobile service with policy and charging control in our test-bed. We show that the PCC system can handle the application-level session information and...
This paper presents a comparative analysis, set in Vanet scenarios and based on simulations, between the well-known IEEE 802.11p standard and an efficient slotted protocol based on RR-Aloha (MS-Aloha). Notably the chosen slotted protocol is completely distributed and based on reservation, and has been specifically designed to face issues typical of mobility, while preserving quality of service guarantee...
Wireless ad hoc networks are a collection of mobile nodes spreading over a defined geographical area, enabling realtime collaborative applications such as push-to-talk and VoIP. Unfortunately, wireless ad hoc networks suffer from limited bandwidth and QoS constraints. A proposed eXplicit MultiCAST (XCAST) based routing protocol (P-XCAST) is presented in this paper to support team-based communications...
Routing is a challenging task in mobile adhoc network due to nodal mobility, unstable links and limited resources. Swarm intelligence, as demonstrated by biological swarm, such as ant colony has found to be a attractive technique for routing in MANET. However existing swarm intelligence based routing protocols find an optimal path by considering only one or two route selection metrics, such as hop...
Interest in broadband wireless access (BWA) has been growing due to increased user mobility and the need for data access at all times. IEEE 802.16e based WiMAX networks promise the best available quality of experience for mobile data service users. Unlike wireless LANs, WiMAX networks incorporate several quality of service (QoS) mechanisms at the Media Access Control (MAC) level for guaranteed services...
This paper introduces the usage and development of mobile ad hoc UAV (unmanned aerial vehicles) network firstly, then, brings forward some problems of ad hoc UAV network presently, and gives some related research topics about mobile ad hoc UAV fleet network, especially routing protocol and date integrity technologies. Finally, give a conclusion about our preliminary studies and this paper.
As the next generation Internet (NGI) is coming, and with the rapid development and great research progress achieved, mobile Internet Protocol version 6 (MIPv6) based network has become a hotspot all over the world. Considering of the rapid growth of network service quality and data exchange requirement, we are going to propose a new data exchange method in this paper. This method uses resource reservation...
The IEEE 802.16 standard, also known as WiMAX, has emerged as an exciting technology for broadband wireless communications with potentials to offer high throughput and support high bandwidth demanding applications. WiMAX, however, has yet to prove its effectiveness when the end terminals are not fixed and have the capacity to move from one place to another at different speeds. Recent studies suggest...
The cross-layer design approach is an important concept in mobile ad-hoc networks which is adopted to solve several open issues. It aims to overcome MANET performance problems by allowing protocols belonging to different layers to cooperate and share network status information while still maintaining separated layers. While cross-layer model could enhance the performance of the applications and achieve...
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