scholarly journals A Fuzzy Preprocessing Module for Optimizing the Access Network Selection in Wireless Networks

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Faisal Kaleem ◽  
Abolfazl Mehbodniya ◽  
Kang K. Yen ◽  
Fumiyuki Adachi
Keyword(s):  
Wireless Networks ◽  
Wireless Network ◽  
Proper Time ◽  
Heterogeneous Wireless Networks ◽  
Access Network ◽  
Wireless Access ◽  
Vertical Handoff ◽  
Heterogeneous Wireless Network ◽  
Multiple Interfaces ◽  
Access Network Selection

A heterogeneous wireless network is characterized by the presence of different wireless access technologies that coexist in an overlay fashion. These wireless access technologies usually differ in terms of their operating parameters. On the other hand, Mobile Stations (MSs) in a heterogeneous wireless network are equipped with multiple interfaces to access different types of services from these wireless access technologies. The ultimate goal of these heterogeneous wireless networks is to provide global connectivity with efficient ubiquitous computing to these MSs based on the Always Best Connected (ABC) principle. This is where the need for intelligent and efficient Vertical Handoffs (VHOs) between wireless technologies in a heterogeneous environment becomes apparent. This paper presents the design and implementation of a fuzzy multicriteria based Vertical Handoff Necessity Estimation (VHONE) scheme that determines the proper time for VHO, while considering the continuity and quality of the currently utilized service, and the end-users' satisfaction.

scholarly journals Implementation of Vertical Handoff Over LTE, Wi-Fi and WiMAX Networks

2019 ◽  
Vol 9 (2S3) ◽  
pp. 217-221
Keyword(s):  
Wireless Networks ◽  
Quality Of Service ◽  
Wireless Network ◽  
Wireless Access ◽  
Vertical Handoff ◽  
Heterogeneous Wireless Network ◽  
Wimax Networks ◽  
Performance Factors ◽  
End To End Delay

The forthcoming wireless networks provide the continuous services to their users for different applications by the integration of diverse wireless access technologies known as heterogeneous wireless network. The heterogeneous wireless network improves the Quality of Service for stationary and non-stationary mobile users. Even when users are in mobility the services are provided by means of handoff or handover. In this paper, the integration of three different wireless networks such as LTE, WiMAX and Wi-Fi networks and their vertical handoff performance analysis are presented. These diverse wireless networks which are considered for integration are modeled as a heterogeneous wireless network. This network is designed using QualNet simulator. Furthermore, the designed heterogeneous network, vertical handoff performance is estimated by using factors such as throughput, jitter and End to End delay. With these performance factors, the designed network’s Quality of Service (QoS) is estimated under mobility conditions.

scholarly journals Evaluation of Vertical Handoff Decision Algorightms Based on MADM Methods for Heterogeneous Wireless Networks

2012 ◽  
Vol 10 (4) ◽  
Author(s):  
E. Stevens-Navarro ◽  
J.D. Martinez-Morales ◽  
U. Pineda-Rico
Keyword(s):  
Wireless Networks ◽  
Heterogeneous Wireless Networks ◽  
Multiple Attribute Decision Making ◽  
Wireless Access ◽  
Vertical Handoff ◽  
Technical Issue ◽  
Wireless Environment ◽  
Multiple Attribute ◽  
Voice Data ◽  
Extensive Performance

In the forthcoming heterogeneous wireless environment, the mobility management of users roaming between different wireless access technologies is a challenging and important technical issue. New mobile devices such as netbooks, smartphones and tablets allow users to perform vertical handoffs among different wireless networks. The multiple attribute decision making (MADM) methods are suitable tools to model and study the vertical handoff process. Hence, recently several MADM methods such as SAW, MEW, TOPSIS, GRA, ELECTRE, VIKOR and WMC have been proposed for vertical handoff. In this paper, we present an extensive performance evaluation and comparative study of the seven MAMD methods by means of numerical simulations in MATLAB. We evaluate the performance of each vertical handoff method under different applications such as voice, data, and cost-constrained connections. We also perform a sensitivity analysis and evaluate the computational complexity of each method in terms of number of floating point operations.

A Concurrent Transmission Scheme for in Heterogeneous Wireless Network

2012 ◽  
Vol 546-547 ◽  
pp. 1314-1319
Author(s):  
Xiao Bo Wu ◽  
Yu Ming Mao ◽  
Fan Wu ◽  
Qin Yu ◽  
Su Peng Leng
Keyword(s):  
Wireless Network ◽  
Access Network ◽  
Selection Criterion ◽  
Wireless Access ◽  
Telecommunication Service ◽  
Heterogeneous Wireless Network ◽  
Mobile Telecommunication ◽  
Transmission Scheme ◽  
3G Networks ◽  
Concurrent Transmission

Integration of the wireless LANs (WLAN) and 3G networks, such as Universal Mobile Telecommunication Service (UMTS), has been intensively studied recently due to their complementary characteristics. In this paper, we design and implement a flexible protocol stack architecture which can support concurrent transmission via multiple radio interfaces. Furthermore, the multiple services with various QoS requirements are differentiated and transported in the best wireless access network which is determined by the proposed network selection criterion-- Multi-Criteria Decision Making (MCDM), in the heterogeneous wireless network. Simulation results demonstrate that the proposed concurrent transmission scheme improves the network utility and provide the QoS services among the multiple wireless access networks more efficiently.

Handoff Management in Next Generation Wireless Networks

2010 ◽  
pp. 1790-1811
Author(s):  
Nidal Nasser ◽  
Tarek Bejaoui
Keyword(s):  
Wireless Networks ◽  
Wireless Network ◽  
Heterogeneous Wireless Networks ◽  
User Preferences ◽  
Fourth Generation ◽  
Vertical Handoff ◽  
Next Generation ◽  
Wireless Technologies ◽  
Handoff Management ◽  
4G Wireless

Major research challenges in the next generation of wireless networks include the provisioning of worldwide seamless mobility across heterogeneous wireless networks, the improvement of end-to-end Quality of Service (QoS), supporting multmedia services over wide area and enabling users to specify their personal preferences. The integration and interoperability of this multitude of available networks will lead to the emergence of the fourth generation (4G) of wireless technologies. 4G wireless technologies have the potential to provide these features and many more, which at the end will change the way we use mobile devices and provide a wide variety of new applications. However, such technology does not come without its challenges. One of these challenges is the user’s ability to control and manage handoffs across heterogeneous wireless networks. This chapter proposes a solution to this problem using Artificial Neural Networks (ANNs). The proposed method is capable of distinguishing the best existing wireless network that matches predefined user preferences set on a mobile device when performing a vertical handoff. The overall performance of the proposed method shows 87.0 % success rate in finding the best available wireless network.

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