high-speed wireless network applications

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A Novel Approach for Generation of Hermite - Guassian beam Using Patch Antenna Array for High Speed Communication in Wireless Network Applications

A Novel Approach for Generation of Hermite - Guassian beam Using Patch Antenna Array for High Speed Communication in Wireless Network Applications

ABSTRACT: The growth in wireless network applications increased the usage of mobile phones and other transportable electronics devices. Hence there arises a need for high speed communication to avoid congestion in wireless system. This motivated us to develop a method for the generation of millimeter–wave Hermite- Guassian (HG) beams by designing patch antenna. Due to the congestion of the frequency spectrum and the needs of higher data rates, millimeter wavelength is preferred. Four inset-fed microstrip patch elements with microstrip feed network is used for generating a HG11 beam. The antenna was designed on a FR4 (Flame Retardant) epoxy substrate. FR4 is a grade designation assigned to glass-reinforced epoxy laminate sheets, tubes, rods and Printed Circuit Board (PCB). The array is designed using HFSS (High Frequency Structured Simulator), a standard industrial tool for full wave electromagnetic simulation. The total volume of the designed antenna is 8 mm x 8 mm x 0.125 mm. The array return loss and radiation pattern both have been characterized in E-band. The VSWR (Voltage Standing Wave Ratio) and gain are also been measured.
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Performance Comparison of Various Single Patch Microstrip Patch Antenna for High Speed Wireless Applications

Performance Comparison of Various Single Patch Microstrip Patch Antenna for High Speed Wireless Applications

MIMO transmission is one of the promising antenna technologies used for wireless communications. When the transceiver uses more than one antenna, the antennas must be placed atleast half of the carrier wavelength apart, in order to transmit/receive uncorrelated signals. Not only for the MIMO applications, there numerous applications are quotable for microstrip antennas such as medical, defense, radar and RFID etc. Among many applications, RFID technology has a bright future for wireless communication through a network such as the internet. But the design of the antenna suffers from narrow bandwidth in both bands. An antenna is an electrical device which converts electric power into radio waves and viceversa. It is usually used with aradio transmitter or radio receiver. Antennas are essential components of all equipment that uses radio waves.Among many types of antennas, microstrip antenna have attracted a lot of attention due to rapid growth in wireless communication due to its lightweight,low volume,low profile, low fabrication cost and ease of integration with microwave integrated circuits (MICs). A Patch antenna (also known as a rectangular microstrip antenna consists of a radiating patch of any geometry ( e.g Rectangle, Square, Triangle, Circle, Ring etc) on one side and dielectric substrate in the other side.
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Zigbee- A High Speed Wireless Data Transfer Technology

Zigbee- A High Speed Wireless Data Transfer Technology

ZigBee Device Object: The key definition of ZigBee is the ZigBee device object, which addresses three main operations; service discovery, security and binding. The role of discovery is to find nodes and ask about MAC address of coordinator/router by using unicast messages. The discovery is also facilitating the procedure for locating some services through their profile identifiers. So profile plays an important role. The security services in this ZigBee device object have the role to authenticate and derive the necessary keys for data encryption. The network manager is implemented in the coordinator and its role is to select an existing PAN to interconnect. It also supports the creation of new PANs. The role of binding manager is to binding nodes to recourses and applications also binding devices to channels .
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Impact of Randomness on MAC Layer Schedulers over High Speed Wireless Campus Network in IEEE802.11e

Impact of Randomness on MAC Layer Schedulers over High Speed Wireless Campus Network in IEEE802.11e

Real time Interactive Multimedia (IMM) that is standard application from Wireless Local Area Networks (WLANs) and includes VoIP, Mobile Video conference and so on from past years have shown tremendous growth and deployment in IEEE802.11 [1-3].The ease of evaluation for high speed Wireless Campus Network (WCN), a interconnection of multiple WLANs (in a single wireless subnet) has been made much easier by the contribution and advancement of IMM applications [4]. Due to the heterogeneities and constraints like- the requirements of severe Quality of Service (QoS), limited bandwidth and the different standards etc, the transmission of IMM applications over the WCN is a challenging issue. Among IMM applications , some major services include voice, video conferencing, animation, graphics and so on over the WCN and for optimal performance ,these applications
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High speed adaptive wireless body area networks

High speed adaptive wireless body area networks

Adaptive ultra-wideband wireless body area network (WBAN) is proposed in this paper as a feasible mobile health platform, offering a high-speed and robust service. It employs a space-time-frequency-coded (STFC) multiband orthogonal frequency division multiplexing ultra-wideband technology. It is designed to improve the average bit error performance for high data rate applications while maintaining a reasonably high throughput in body-to- external links of a WBAN. The proposed adaptive WBAN comprises two novel components, namely, the frame transmission model and the bit error rate (BER) estimation-based adaptive algorithm. In addition, the optimization of adaptive parameters is conducted to obtain an extra improvement, hence enhancing the performance further. Simulation results show that the proposed optimized adaptive system achieves up to a 2-dB gain over the adaptive WBAN, thus providing up to a 6-dB gain over the non-adaptive WBAN system. This improvement is equivalent to a reduction of the power consumption by up to 37% compared to the non-optimized adaptive WBAN and up to 75% compared to the non-adaptive WBAN system, thus extending the battery life and enhancing the reliability of WBAN services significantly.
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Wireless Sensor Networks for Personal Health and Structural Health Monitoring

Wireless Sensor Networks for Personal Health and Structural Health Monitoring

uncomfortable for patients leading to restricted mobility and more anxiety, but is also hard to manage for the staff. Quite common are deliberate disconnections of sensors by tired patients and failures to reattach sensors properly as patients are moved around in a hospital and handed off across different units. Wireless sensing hardware that are less noticeable and have persistent network connectivity to backend medical record systems help reduce the tangles of wires and patient anxiety.

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No-compromise protection for your business

No-compromise protection for your business

SonicWALL TZ series firewalls provide broad protection with advanced security services consisting of on-box and cloud-based anti-malware, anti- spyware, intrusion prevention system (IPS), and URL filtering. To counter the trend of encrypted attacks, the new SonicWALL TZ series has the processing power to inspect encrypted SSL connections against the latest threats. Backed by the Dell SonicWALL Global Response Intelligent Defense (GRID) network, the SonicWALL TZ series delivers continuous updates to maintain a strong network defense against cybercriminals. The SonicWALL TZ series is able to scan every byte of every packet on all ports and protocols with almost zero latency and no file size limitations. The SonicWALL TZ series features
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Wireless Sensor Network Technology and Networking Algorithms for Wireless Sensor Network Applications: A Survey

Wireless Sensor Network Technology and Networking Algorithms for Wireless Sensor Network Applications: A Survey

Abstract: Recent advances in the electronics technologies results into revolutionary developments in fields of science and technology. Due to relentless efforts of scientists and technologists the fields such as Embedded Technology, Integration technology, communication technology, smart sensor design technology etc are pervasively growing and evolving innovative fields for research and developments. On confluence of embedded technology and communication technology with computer technology, a novel field called Wireless Sensor Network is emerged. Wireless sensor network provides new paradigm for sensing and disseminating information from various environments with a great potential to serve many and diverse applications. The monitoring of various physical parameters such as temperature, fluid level, relative humidity, intensity of light, concentration of gasses dissolved in the atmosphere, vibrations, strain, soil moisture, industrial process parameters, pH and salinity of water etc plays commendable role in various sectors such as environmental pollution monitoring, high-tech agriculture, structural engineering, chemical and physical industries, transportation, military and defense, healthcare, forestry etc. The WSN is the network of smart sensor nodes, wherein the standard protocols such as Zigbee, Bluetooth, wifi, GSM etc technologies are employed to establish the RF communication. The distributed sensor nodes must be routed in the network to ensure cooperative collection of the data. Different routing protocols have been studied for their suitability to use in the WSN. It is found that, to establish the WSN, different routing protocols have been reported. Therefore, in present paper wireless sensor network technology and networking algorithms used in wireless sensor network for diverse applications are discussed.
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High Speed Emergency Alert System with Prevention Process Using Wireless Sensor Network for Building Monitoring

High Speed Emergency Alert System with Prevention Process Using Wireless Sensor Network for Building Monitoring

The monitoring system consists of two types of sensor modules: strain sensing modules and acceleration sensing modules. They are placed in the building as shown in Fig. 1. The strain sensor modules are mounted at the lowest level of the building, to estimate the vertical column loads and any variation due to settlement. Horizontal acceleration is measured by two 3D acceleration sensing modules (where only the two horizontal axes are really required) at each level during an earthquake, allowing analysis of the seismic response of the whole structure. A typical 7-story, 24-column building requires approx. 72 strain sensors (3 per column) and 14 accelerometer modules (2 per floor). The data is wirelessly transmitted to a nearby base station using a line of sight link with a range of >1km. The line of sight link uses directional antennas to improve the link budget, but not so directional that alignment is required, which could pose a problem during seismic events. The receiver base station can store and process the data or forward them, immediately or later, using classical wide area network connection technology. In this way, provided all modules as well as the receiver base station have battery back-up power, the data acquired during seismic events can be properly recorded even in case of outages of the electric power and/or communication networks.
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McGraw Hill   Wireless Data Demystified (2003) pdf

McGraw Hill Wireless Data Demystified (2003) pdf

Higher (and more) data rates aren’t 802.11a’s only advantage. It also uses a higher frequency band, 5 GHz, which is both wider and less crowded than the 2.4-GHz band that 802.11b shares with cordless phones, microwave ovens, and Bluetooth devices. The wider band means that more radio channels can coexist without interference. Each radio channel corre- sponds to a separate network, or a switched segment on the same network. The precise number of channels varies by country because each regu- lator allocates a different amount of spectrum for unlicensed use. How- ever, there are always more channels at the 5-GHz band. In the United States, the 2.4-GHz band is wide enough for only three, whereas 5 GHz has room for 11. The first 802.11a cards to ship support only eight of these, but it’s still enough for most purposes. There’s even a (so far) pro- prietary scheme developed by Atheros (http://www.atheros.com) that combines two 802.11a channels together to double the data rate.
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DESIGN OF QUATERNARY ADDER FOR HIGH SPEED APPLICATIONS

DESIGN OF QUATERNARY ADDER FOR HIGH SPEED APPLICATIONS

Where; 𝑋 𝑖 can be any value or digit from the digit set {3̅, 2̅, 1̅, 0, 1, 2, 3 }for achieving the appropriate decimal representation. In this number system; a QSD negative number is nothing but the QSD complement of the QSD positive number [7], i.e. 3̅’ = 3 ; 3’ = 3̅; 2̅’ = 2 ; 2’ = 2̅ ; 1̅’ = 1 ; 1’ = 1̅.For eg.233 10 = 332̅1 𝑄𝑆𝐷 and −233 10 = 3 ̅ 3̅21̅ 𝑄𝑆𝐷 . In QSD single decimal number can be represented in multiple ways. Operation on large number of digits such as 64, 128, or more can be implemented with constant delay and complexity. A high speed and area effective adders and multipliers can be implemented using QSD number system.
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A Survey on 5G-Drivers and Technology

A Survey on 5G-Drivers and Technology

3G system includes web base access, multi-media services, email & video conference offers data rate upto 2Mbps over 5MHz channel width depending on mobility and spectrum efficiency. This technology makes use of wide band code division multiple access (WCDMA), high speed downlink packet multiple access (HSPDA) and high speed OFDM packet access (HSOPA). HSOPA uses OFDM and MIMO antenna technology and supports upto 10 timers as WCDMA base system and lower processing power.

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Enabling Enhanced Retail Applications with Secure IP and Wireless Communications

Enabling Enhanced Retail Applications with Secure IP and Wireless Communications

Retailers who want to provide wireless access for guests – while protecting their internal networks – can take advantage of the Wireless Guest Services feature. It enables the creation of a separate access zone for guest wireless users, while separating that zone from the sensitive POS network. The TZ 170 Wireless and TZ 170 SP Wireless accomplished this by creating a separate service for guest users, who are only allowed to send and receive data through the WAN port connected to the Internet, and can never connect to the LAN port regardless of the firewall configuration (see figure 3).
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Survey on PASER: Secure and Efficient Routing Approach for Airborne Mesh Networks

Survey on PASER: Secure and Efficient Routing Approach for Airborne Mesh Networks

ABSTRACT: Recent advances in embedded systems, energy storage, and communication interfaces, accompanied by the falling prices of WLAN routers and a considerable increase in the throughput of a WLAN (IEEE 802.11), have facilitated the proliferation of WLAN Mesh Network (WMN) applications. In addition to their current deployments in less dynamic community networks, WMNs have become a key solution in various highly dynamic scenarios. For instance, WMNs are intended to interconnect self-organized, cooperative, and small Unmanned Aerial Vehicles in a wide range of applications, such as emergency response, environmental monitoring, and ad-hoc network provisioning. Wireless mesh network has served as backbone for establishment of several upcoming technologies. It is possible owning to self-healing, auto configuration nature of these networks. On one hand it offers an ease for compatibility, availability, feasibility however on other hand these networks are prone to various security attacks. These security attacks can sabotage the communication between sender and receiver. A need of algorithm that can prevent the network from security attacks such as DoS attack. The proposed work we implements a position-aware, secure, and efficient mesh routing approach (PASER). Our proposal prevents more attacks than the IEEE 802.11s/i security mechanisms and the well-known, secure routing protocol ARAN, without making restrictive assumptions. A hybrid cryptography algorithm will provide additional security mechanism to the system.
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Mobile and Wireless Services and Service Providers in Spain

Mobile and Wireless Services and Service Providers in Spain

Of the 27 resellers licensed at the end of 2002, only Tele2 is actually offering any type of service; however, its offering remains highly limited both in terms of breadth of service and geography. Moreover, the licenses granted to the existing virtual operators expired at the beginning of 2003; thus, corporate customers in Spain continue to be restricted to the three profiled carriers. Any of the three profiled carriers have the capability to service the needs of the corporate end of the market. In fact, very little differentiates them at present. All three are more than capable of servicing the needs of even the most demanding corporate client. The market leader in terms of subscribers continues to be Telefonica Moviles, which continues to concentrate on launching tariffs reduced in certain aspects, aimed at specific market segments. Having achieved total coverage of the national territory utilizing its own network, Amena continues to win important market share by competing effectively on the basis of low and transparent pricing structures. Over the longer term, the build-out of Vodafone’s converged fixed/mobile network will enable it to differentiate its service offering beyond that of Amena and Telefonica Moviles, by offering corporate users unified voice and data services.
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System Engineering Guidelines

System Engineering Guidelines

A key example is broadband interference. Many legacy wireless systems have high power. As an example, consider a personnel communication system using high power two-way radios operating in the 800 MHz frequency range. Although the system is legal and operating according to specifications, it can emit broadband interference that spans several GHz in the spectrum. This broadband interference then affects all applications in other RF bands by reducing the signal-to-noise ratio. The simple solution is to place a band pass filter on all systems such that they only emit RF energy in the spectrum licensed for usage. See the illustrative diagram below showing broadband interference before and after the implementation of a low pass filter.
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Strategies for wireless network control with applications to LTE

Strategies for wireless network control with applications to LTE

LTE is aiming at providing ubiquitous connectivity. However, indoor users usually suffer from strong penetration loss due to building walls. As a consequence of the increasing usage of data traffic, a macro-only network is no longer able to solve this problem. Therefore, femtocells are proposed as an economical solution to serve indoor UEs [22]. Femtocells introduce home evolved node B (HeNB) as low-power short range base stations, which are connected to the backhaul network via broadband connections. HeNBs generally have a maximum Tx power of 10-20 dBm, which results in a covered range of 10-30 meters. Due to the shield of electro-magnetic wave caused by building walls, HeNBs are supposed to have limited interference to the outdoor users, while giving the indoor users a seamless mobile connection. Thus, an efficient spatial reuse of the spectrum can be achieved in a heterogeneous network with overlayed macro- and femtocells [76] [18].
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Wireless Sensor Network – Theoretical Findings and Applications

Wireless Sensor Network – Theoretical Findings and Applications

power and lack of infrastructure, make them more vulnerable to attack than conventional ad hoc networks. The security schemes for WSN should require less computational power and memory because sensor nodes are tiny and have more limited capacity. [9] WSN node is prone to active or passive attack. Some of the well known attacks on WSN are Denial of service (DoS) attack, Sybil attack, Hello Flood, Wormhole attack, Blackhole or Sinkhole attack etc. [20] However, developing solution to these attacks and making it efficient represents a great research challenge. Again, ensuring security in wireless sensor network is a major research issue. Many of today’s proposed security schemes are based on specific network models. As there is a lack of combined effort to take a common model to ensure security for each layer, combining all the mechanisms together for making them work in collaboration with each other will incur a hard research challenge. [19] In a secure wireless ad hoc sensor network, a node is authorized by the network and only authorized nodes are allowed to access the network resources. The generic process to establish such a network consists of bootstrapping, pre-authentication, network security association establishment, authentication, and behaviour monitoring and security association revocation. Among these, authentication is of the utmost importance and is an essential service in network security. Other basic security services like confidentiality, integrity and nonrepudiation depend on authentication. Secret information is exchanged only after nodes are able to verify and validate one another [9].
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Handover Control for Heterogeneous Wireless Access Systems

Handover Control for Heterogeneous Wireless Access Systems

Abstract-- The convergence of various wireless access technologies has always been a difficult assignment because of the fact that they have emerged independently. Future vision of wireless world is an integrated network of different wireless access technologies with improved system resource s utilization anywhere, anytime. WLANs are expected to complement cellular networks such as 2G or 3G in near future. Cellular networks facilitate users with high mobility but less data rate (2 Mbps) as compared to WLAN systems having higher data rate (54Mbps) but less mobility (100m). From the users’ standpoint, the convergence of WLAN and cellular systems together will help to have combined benefits from both technologies. It pledges for a renewed aim beyond 3G, to support at least: 1Gbps bandwidth in low-mobility coverage area, and 100 Mbps peak bandwidth in full mobility mode. The seamless and capable handoff between different access technologies also known as vertical handoff is crucial and remains a testing problem. In this paper, vertical handoff procedure in location-aware heterogeneous wireless access network is being proposed. An outline for the examination of vertical handoff algorithm sensitive to various mobil ity parameters including velocity, FS L and RS S threshold is simulated. Moreover, it is targeted to estimate the performance of vertical handoff in terms of RS S (received signal strength) measurement in converged wireless network with appropriate propagation model and is validated by the results of the simulations.
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Title: Maintains Secure Intrusion Detection System for Mobile Ad-hoc Network

Title: Maintains Secure Intrusion Detection System for Mobile Ad-hoc Network

Networks are using a decentralized formless network models that relies on key network for node teamwork functionalities such as routing and standard access. A model base on the Sequential option Ratio Test to explain how nodes can separate between route that contain misbehavior nodes or impure route and routers to do not. The digit of clarification essential to assess a router require not be resolute in development, which suit fine active environment of mobile ad hoc networks.

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