scholarly journals Vertical handoff algorithm for different wireless technologies

2017 ◽  
Author(s):  
Radhwan Mohamed Abdullah ◽  
Zuriati Ahmad Zukarnain
Keyword(s):  
Wireless Network ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Vertical Handover ◽  
Vertical Handoff ◽  
Area Network ◽  
Heterogeneous Wireless Network ◽  
Decision Algorithm ◽  
Handover Decision ◽  
Simulation Results

Transferring a huge amount of data between different network locations over the network links depends on the heterogeneous wireless network. Such a network consists of several networks with different access technologies. Traditionally, a mobile device may be moved to achieve the operations of vertical handover, considering only one criterion, that is, the received signal strength (RSS). The use of a single criterion may cause service interruption, an unbalanced network load, and an inefficient vertical handover. In this paper, we propose enhanced vertical handover decision algorithm based on multiple criteria in the heterogeneous wireless network. The algorithm consists of three technology interfaces: Long-Term Evolution (LTE), Worldwide interoperability for Microwave Access (WiMAX), and Wireless Local Area Network (WLAN). It also employs three types of the vertical handover decision algorithms: equal priority, mobile priority, and network priority. The simulation results illustrate that the proposed handover decision algorithm outperforms the traditional network decision algorithm in terms of handover number probability and the handover failure probability. In addition, it is noticed that the network priority handover decision algorithm produces better results compared to equal priority and mobile priority handover decision algorithm. Finally, the simulation results are validated by the analytical model.

scholarly journals Vertical handoff algorithm for different wireless technologies

2017 ◽  
Author(s):  
Radhwan Mohamed Abdullah ◽  
Zuriati Ahmad Zukarnain
Keyword(s):  
Wireless Network ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Vertical Handover ◽  
Vertical Handoff ◽  
Area Network ◽  
Heterogeneous Wireless Network ◽  
Decision Algorithm ◽  
Handover Decision ◽  
Simulation Results

Transferring a huge amount of data between different network locations over the network links depends on the heterogeneous wireless network. Such a network consists of several networks with different access technologies. Traditionally, a mobile device may be moved to achieve the operations of vertical handover, considering only one criterion, that is, the received signal strength (RSS). The use of a single criterion may cause service interruption, an unbalanced network load, and an inefficient vertical handover. In this paper, we propose enhanced vertical handover decision algorithm based on multiple criteria in the heterogeneous wireless network. The algorithm consists of three technology interfaces: Long-Term Evolution (LTE), Worldwide interoperability for Microwave Access (WiMAX), and Wireless Local Area Network (WLAN). It also employs three types of the vertical handover decision algorithms: equal priority, mobile priority, and network priority. The simulation results illustrate that the proposed handover decision algorithm outperforms the traditional network decision algorithm in terms of handover number probability and the handover failure probability. In addition, it is noticed that the network priority handover decision algorithm produces better results compared to equal priority and mobile priority handover decision algorithm. Finally, the simulation results are validated by the analytical model.

scholarly journals Vertical Handover Decision Algorithm Using Multicriteria Metrics in Heterogeneous Wireless Network

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Gita Mahardhika ◽  
Mahamod Ismail ◽  
Rosdiadee Nordin
Keyword(s):  
Heterogeneous Network ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Blocking Probability ◽  
Vertical Handover ◽  
Area Network ◽  
Decision Algorithm ◽  
Handover Decision ◽  
Code Division Multiple ◽  
Balance Index

Heterogeneous network concept was introduced to satisfy the demands of network’s traffic capacity and data rate. It consists of multiplatform networks with various radio access technologies. Conventionally, a mobile user may roam and accomplish the vertical handover using single criteria, such as received signal strength (RSS). Single criteria vertical handover decision, however, may cause inefficient handoff, unbalanced network load, and service interruption. This paper proposed an improved vertical handover decision using multicriteria metrics in the environment of heterogeneous network consisting of three network interfaces: (i) wireless local area network (WLAN), (ii) wideband code division multiple access (WCDMA), and (iii) worldwide interoperability for microwave access (WiMAX). In the vertical handover decision, four metrics are considered: (i) RSS, (ii) mobile speed, (iii) traffic class, and (iv) network occupancy. There are three types of the vertical handover decision algorithm: (i) equal priority, (ii) mobile priority, and (iii) network priority. Equal priority multicriteria handover algorithm improved the number of handoffs by 46.60 while mobile priority multicriteria algorithm improved the number of handoffs by 90.41% and improved the balance index by 0.09%. Network priority multicriteria method improved the number of handoffs by 84.60%, balance index by 18.03%, and average blocking probability by 20.23%.

scholarly journals Vertical Handover Decision Algorithm Based On Several Specifications in Heterogeneous Wireless Networks

2019 ◽  
Vol 8 (9) ◽  
pp. 977-982
Keyword(s):  
Wireless Networks ◽  
Heterogeneous Wireless Networks ◽  
Signal Strength ◽  
Vertical Handover ◽  
Vertical Handoff ◽  
Heterogeneous Wireless Network ◽  
Generation System ◽  
Decision Algorithm ◽  
Handover Decision ◽  
Choice Procedure

Vertical handoff takes place when a mobile incurable button from one network to one more (e.g., from WLAN to CDMA 1xRTT). The purpose of this paper is to establish the problems under which vertical handoff need to be done. The trouble is developed as a Markov choice procedure. A web link benefit feature and also a signaling price feature are presented to record the tradeoff in between the network sources made use of by the link and also the signaling as well as handling tons sustained on the network. Commonly, a mobile phone might be transferred to attain the procedures of vertical handover, thinking about just one standard, that is, the received signal strength (RSS). Making use of a solitary requirement might trigger solution disruption, an out of balance network lots, and also an ineffective vertical handover. In this paper, we recommend boosted vertical handover decision algorithm based upon several standards in the heterogeneous wireless network. As well as additionally In this paper, we research regarding 5th generation system.

A Vertical Handoff Decision Algorithm Based on QoS Evaluation

2014 ◽  
Vol 989-994 ◽  
pp. 1464-1468
Author(s):  
Yang Tao ◽  
Kun Zhou
Keyword(s):  
User Preferences ◽  
Vertical Handoff ◽  
Heterogeneous Wireless Network ◽  
Analytic Hierarchy ◽  
Full Account ◽  
Decision Algorithm ◽  
Target Network ◽  
Simulation Results ◽  
Qos Evaluation ◽  
Hierarchy Process

In the next generation of heterogeneous wireless network environment, to meet the network requirements of diverse services ,we propose a vertical handoff decision algorithm based on QoS evaluation that refine the handover unit to services. The proposed algorithm consider the needs of the services、 network conditions、 user preferences and other factors, and makes Analytic Hierarchy Process (AHP) and cost function combine to choose the target network that is best meet the requirements of services . Comparing with the vertical handoff decision based on RSS, simulation results show that the proposed method can take full account of the different QoS requirements of various services types to choose the appropriate network, and would not cause performance degradation.

Novel dual-band multistrip monopole antenna with defected ground structure for WLAN/IMT/BLUETOOTH/WIMAX applications

2013 ◽  
Vol 6 (1) ◽  
pp. 93-100 ◽  
Author(s):  
Jaswinder Kaur ◽  
Rajesh Khanna ◽  
Machavaram Kartikeyan
Keyword(s):  
Wireless Local Area Network ◽  
Local Area Network ◽  
Design Procedure ◽  
Monopole Antenna ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Area Network ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Simulation Results

In the present work, a novel multistrip monopole antenna fed by a cross-shaped stripline comprising one vertical and two horizontal strips has been proposed for wireless local area network (WLAN)/Industrial, Scientific, and Medical band (ISM)/International Mobile Telecommunication (IMT)/BLUETOOTH/Worldwide Interoperability for Microwave Access (WiMAX) applications. The designed antenna has a small overall size of 20 × 30 mm2. The goal of this paper is to use defected ground structure (DGS) in the proposed antenna design to achieve dual-band operation with appreciable impedance bandwidth at the two operating modes satisfying several communication standards simultaneously. The antenna was simulated using Computer Simulation Technology Microwave Studio (CST MWS) V9 based on the finite integration technique (FIT) with perfect boundary approximation. Finally, the proposed antenna was fabricated and some performance parameters were measured to validate against simulation results. The design procedure, parametric analysis, simulation results along with measurements for this multistrip monopole antenna using DGS operating simultaneously at WLAN (2.4/5.8 GHz), IMT (2.35 GHz), BLUETOOTH (2.45 GHz), and WiMAX (5.5 GHz) are presented.

Implementation of a Digital Radiographic Image Acquisition and Retrieval System (DRIARS) Using a Wireless Network in an Orthodontic Department

2008 ◽  
Vol 9 (4) ◽  
pp. 115-123 ◽  
Author(s):  
Muralidhar Mupparapu ◽  
Robert E. Binder ◽  
John M. Cummins ◽  
Cecile A. Feldman ◽  
Mark A. Cappelli ◽  
...  
Keyword(s):  
Wireless Network ◽  
Retrieval System ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Image Acquisition ◽  
Local Area ◽  
Dental School ◽  
Area Network ◽  
Radiographic Image ◽  
X Ray

Abstract Aim The objective of this report is to describe the implementation and pilot-test of an integrated wireless local area network (WLAN) system that incorporated the Planmeca Promax® CCD based digital panoramic/ cephalometric x-ray system, Dolphin® software, and multiple remote user units to increase the efficiency of data management by the residents in the Department of Orthodontics. Background The Department of Orthodontics of the New Jersey Dental School (NJDS) acquired the Dolphin® cephalometric analysis software and the Planmeca Promax® digital panoramic/cephalometric x-ray units on separate occasions. Dolphin has been in use for many years at this institution, the current version being 10, and the Promax was acquired in the Fall of 2002. The digital panoramic and cephalometric radiographs were acquired and stored separately in the Planmeca's Dimaxis database. Report During the incorporation of the WLAN, there was an opportunity to research and install the best available security system for the WLAN so it could be a network model for the other departments within the dental school and perhaps other dental schools around the nation. Summary Digital radiographs, once obtained, can be stored locally or transmitted securely to remote locations via a local area network. This article describes the selection criteria and methodology that would optimize the transmission and retrieval of such images instantaneously on demand at chair side locations. This will not only save significant clinical time but will enhance the productivity of the clinic in the long run. Citation Mupparapu M, Binder RE, Cummins JM, Feldman CA, Cappelli MA, Matheson PB. Implementation of a Digital Radiographic Image Acquisition and Retrieval System (DRIARS) Using a Wireless Network in an Orthodontic Department. J Contemp Dent Pract 2008 May; (9)4:115-123.

scholarly journals TECHNICAL PRINCIPLES FOR CREATING A WIRELESS LOCAL NETWORK WI-FI

T-Comm ◽  
2021 ◽  
Vol 15 (7) ◽  
pp. 28-33
Author(s):  
Albina Y. Sharifullina ◽  
◽  
Roman R. Galyamov ◽  
Rimma S. Zaripova ◽  
◽  
...  
Keyword(s):  
Wireless Networks ◽  
Wireless Network ◽  
Wireless Lan ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Local Area ◽  
Local Network ◽  
Area Network ◽  
Access Points ◽  
Basic Service

This article discusses the stages of development, characteristics of a wireless local area network Wi-Fi, options for its topology and equipment used. Currently, there are such different types of wireless networks as Wireless Wide Area Network, Wireless Metropolitan Area Networks (Wireless Neighborhood Area Network), Wireless Local Area Network, Wireless Personal Area Network. Each of the listed wireless networks has its own specific range and application. Wireless LAN Wi-Fi refers to the Wireless Local Area Network. The first wireless LAN standard, Wi-Fi, was approved in 1997. From the moment of their appearance to the present day, the following standards of this network have appeared: 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac, 802.11ad, 802.11ax. For each standard, the speeds and frequency ranges at which the data transmission was carried out are indicated, and the technologies on which they are built are described. Wireless LAN Wi-Fi has three topologies: 1) Ad-Hoc (point-to-point) or Independent Basic Service Set; 2) Basic Service Set (“client / server”) and 3) Extended Service Set (“extended service areas”). To build a Wi-Fi network, network adapters, access points, routers, ADSL modems, Wi-Fi phones, Wi-Fi antennas, Wi-Fi repeaters are used. Wi-Fi adapters are used by devices that do not have a built-in Wi-Fi module. Wi-Fi access points are designed for organizing wireless access within a local network. Wi-Fi routers are designed to route traffic on a computer network. ADSL modems are used to access the Internet over a telephone line. Wi-Fi repeaters are used to expand the coverage of a wireless network using already installed equipment. Wi-Fi phones are wireless IP phones. Wi-Fi antennas are used to extend the range of a wireless network.

scholarly journals A novel automobile antenna for vehicles communication of IoT systems in 5G network

2020 ◽  
Vol 2020 (1) ◽  
Author(s):  
Wei Luo ◽  
Wuquan Chen ◽  
Yulu Feng ◽  
Yuqi Yang
Keyword(s):  
Mobile Communication ◽  
Communication System ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Impedance Matching ◽  
Antenna System ◽  
Area Network ◽  
Mobile Communication System ◽  
Blind Area ◽  
Simulation Results

Abstract The Internet of vehicles (IoV) is an important part of mobile communication system with the development of Internet of things. A novel multiband automobile antenna is proposed, which can cover all frequency bands for the long-term evolution (LTE), the fifth generation wireless systems (5G), the wireless local area network and the dedicated short-range communication (from 690 to 944 MHz and from 1.46 to 6 GHz). The antenna is designed based on the monopole antenna, and the impedance matching performance of the antenna is improved by loading the toothed capacitor and the impedance matching disk. The simulation results show that the automobile antenna achieves good impedance matching in the working bandwidth and obtains omnidirectional radiation pattern in the horizontal direction. The electric field distribution of the antenna placed on the vehicle roof is simulated to evaluate the network performance of the antenna system in the urban environment. The transmission coefficient of the transceiver system using the automobile antenna is also analyzed based on the electromagnetic simulation results and statistical model. The blind area of mobile communication system is effectively covered with the automobile antenna, which could be used to connect the LTE cell and the IoV system.

scholarly journals Anticipating WPS PIN Vulnerability to Secure Wireless Network

2013 ◽  
Vol 4 (2) ◽  
pp. 1116
Author(s):  
Indra Dwi Rianto
Keyword(s):  
Wireless Network ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Access Point ◽  
Local Area ◽  
Area Network ◽  
Security Vulnerability ◽  
Design Flaw ◽  
Set Up

WiFi Protected Setup (WPS) is a standardized function supported by numerous vendors of wireless routers and access point to help set up connection to a wireless local area network. It is designed to simplify the set up and generally enabled by default. Due to design flaw, the WPS or QSS PIN is susceptible to a brute forceattack. In this paper, we test the security vulnerability occurred, evaluate the performance and give recommendations to anticipate the attack.

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