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Seen the diversity of the technologies of current access networks, the mobile terminals have the possibility of reaching several types of networks at the same time under the concept “Always Best Connected” (ABC). This imposes a good management of the Vertical Handover (VH). We distinguish three phases of the VH: handover initiation, network selection and handover execution. To optimize network selection...
Worldwide Interoperability for Microwave Access (WiMAX), which based on the IEEE 802.16-2009 standard is a serious competitor of Long Term Evolution (LTE) for cellular networks providing high data rates to mobile users. To support various multimedia applications the Quality of Service (QoS) support is a crucial function. This standard determines the air interface, including the medium access control...
This paper presents the technical study of the Radio Access Network (RAN) migration from WiMAX to LTE for the Internet Service Provider (ISP) Yota de Nicaragua. For our analysis, we conducted a case study in the city of Masaya, Nicaragua using predictive tool Atoll™, where we describe and simulate two scenarios. The first scenario represents the current WiMAX (IEEE 802.16e) network deployed on the...
Method of balancing the number of subchannels allocated to subscriber stations in WiMAX network based on solution of optimization problem associated with maximizing the lower level allocated bandwidth for each subscriber station according to its QoS requirements for access rate was investigated. Research of proposed method confirmed the adequacy of the model and effectiveness of solutions as a whole...
LTE and WiMAX are the most important radio access technologies in the fourth generation mobile networks providing broadband access. The technologies bring strong QoS support, especially for multimedia services such as real-time video streaming, requiring bounded packet loss rate and delay. To reach these goals, effective packet scheduling schemes are needed to allocate radio resources. The function...
Two Level Scheduling Algorithm (TLSA) is a QoS-enabled fair and efficient connection admission control and packet scheduling algorithm for WiMAX networks. At the first level, an inter-class scheduling algorithm distributes bandwidth among various WiMAX service classes. Then at the second level, class specific algorithms distribute bandwidth among connections of the associated class. The present paper...
In this paper, the performance of quality of services for an IEEE 802.16 based WiMAX access network is analyzed. WiMAX is an emerging broadband wireless communication standard used as a mode of transmission and high speed internet access. WiMAX is a technology which provides more bandwidth, better QoS, better security, greater coverage and has low infrastructure cost. The quality of service related...
3G small cells are becoming a promising solution for inexpensive 3G coverage in rural small villages, but the high cost of backhaul infrastructures remains an obstacle for the worldwide adoption of this kind of solutions. On the other hand, broadband wireless infrastructures may be found in many rural areas for communications in specific sectors such as health or education services, environmental...
An intelligent handover decision system (HDS) is essential to heterogeneous wireless mobile networks in order to fulfill user's expectations in terms of universal and seamless services. With emerging real-time services in heterogeneous networking environment, including multiple QoS parameters in handover decision process seems essential. In this paper, fuzzy logic is applied to enhance the intelligence...
Multimedia streaming is one of the main Internet services which tendency of significant growth stays unchanged. In this paper an empirical analysis for three most popular multimedia traffics (Videoconference, Video-on-Demand and Video-surveillance) has been conducted. The quality-of-service (QoS) performance has been evaluated in terms of distributed throughput for these three most popular internet...
WiMAX Networks are emerging as key components of a solution to provide mobile broadband and Network planning and resource allocation (available unused Bandwidth) in flexible and cost effective way. Since the data can share (STA) useful information or Data in order to improve the performance of handoff procedures. Beam forming Technique is an improvement in range of data rate and minimizing the number...
Based on the laws of the known mechanisms of the frequency resources scheduling in the download channel, solution of the problem raised in this paper assures QoS by available resources which directly influent on quality of design of the equipment. The WiMAX resource allocation algorithms determine which users to schedule, how to allocate subcarriers to them, and how to determine the appropriate power...
The Voice over Internet Protocol (VoIP) and Wireless Local Area Networks (WLANs) has observed the fastest growth in the world of communication. The WLAN is the most assuring of technologies among the wireless networks, which has facilitated high-rate voice services at low cost and good flexibility over IP-based networks. Worldwide Interoperability for Microwave Access (WiMAX) technology is also a...
Next generation mobile communication is developing towards heterogeneous overlay networks, which provide multiple access patterns for users. Efficient vertical handoff algorithms among different network are required to meet a user's quality of service. In this paper, a vertical handoff algorithm is proposed in which fuzzy logic processing (FLP) is combined with analytic hierarchy process (AHP) for...
With the introduction of different wireless communication technologies, the demand of users for real time services like voice along with data called VoIP is increasing tremendously. In order to provide high quality services, the new technologies like WiMAX have to consider all the quality parameters attached with a service. Thus, the paper discusses the WiMAX support to such services along with all...
Always Best Connected (ABC) concept allows the best connectivity to mobile users anywhere at any time in heterogeneous network environment. To answer its requirement, Network selection techniques play a considered role in providing the best QoS in such environment. In this paper authors study the use of Multiple Attribute Decision Making (MADM) used to choose the best network from available networks...
Worldwide Interoperability for Microwave Access (WiMAX) is currently one of the newest technologies in wireless communication. International Telecommunication Union (ITU) has defined a spectrum for each region, (Asia is in 3rd region) which is fixed for lifetime. The available spectrum is limited for any type of communication and hence it becomes more expensive. Hence it becomes obvious to use allotted...
Day to day life people are using new technology and communication between user and it is easy in the new era, so the wimax is the worldwide interoperability microwave access(IEEE - 802.16) technology provide good accessibility to user and its results are better than the recent technology (2G,3G). In this paper I have implemented the performance and analysis result of wimax communication using recent...
In this paper, the proposed attack detection scheme in QOS security architecture with elliptic curve Diffie-Hellman (ECDH) protocol to overcome the attacks IMS (IP Multimedia Subsystem) and Femto cell access points (H(e)NBs). Initially, it refers the current security threats and security standards in WiMAX and LTE networks. Both networks WiMAX and LTE are Fourth Generation (4G) wireless technology...
Mobile Worldwide Interoperability for Microwave Access (Mobile WiMAX) is a wireless Metropolitan Area Network technology based on IEEE 802.16e standard. Mobility, security, Quality of Service (QoS), centralized scheduling and radio resources utilization are offered by connection oriented MAC layer in Mobile WiMAX. In this paper, Spare Capacity Procedure technique and WiMAX QoS Aware Load Balancing...
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