wireless communication and networks 2nd edition william stallings ppt

... of generalization Vehicle is a generalization of both Car and Truck The two subclasses, Truck and Car, inherit all of the attributes and behavior from the base class Figure VG.1 shows the two ... the go method and uses the base class implementation of the isEngineOn method. /** * The Car class inherits from Vehicle and overrides the go method * It encapsulates all data and behavior that ... superclass is a generalization of the attributes and behaviors that are common to all of its subclasses In UML, the relationship is described as a generalization and is denoted by a solid line with a hollow

Ngày tải lên: 12/08/2014, 16:21

... Trang 1William Stallings Computer Organization and Architecture 7th Edition Chapter 18 Parallel Processing Trang 2Multiple Processor ... 16Symmetric Multiprocessors• A stand alone computer with the following characteristics — Two or more similar processors of comparable capacity — Processors share same memory and I/O — Processors are ... providing interaction between processors – Interaction at job, task, file and data element levels Trang 17Multiprogramming and MultiprocessingTrang 18SMP Advantages• Performance — If some work can

Ngày tải lên: 30/11/2016, 22:13

... areas of communications and networks The introductions, derivations, discussions and references in this book significantly improve the readers’ understanding of communications and networks and encourage ... Trang 1RECENT ADVANCES IN WIRELESS COMMUNICATIONS AND NETWORKS Edited by Jia-Chin Lin Trang 2Recent Advances in Wireless Communications and Networks Edited by Jia-Chin Lin Published ... heterogeneous wireless networks for next-generation multimedia communication networks Chapter 12 studies the use of a stream control transmission protocol (SCTP) in wireless communication networks

Ngày tải lên: 19/06/2014, 19:20

... OFDM technologies have recently been chosen as candidates for fourth-generation (4G) mobile communications in a variety of standards, such as 802.16m and LTE/LTE-A 2 OFDM fundamentals 2.1 System ... 1: Foundations and Basic Theory, Springer-Verlag, ISBN: 0387940375, New York Lin, J C (2003) Maximum-Likelihood Frame Timing Instant and Frequency Offset Estimation for OFDM Communication Over ... University Press, ISBN-13: 978-0691005478, Uppsala, Sweden D’Andrea, A N., Mengali, U and Reggiannini, R (1994) The Modified Cramer-Rao Bound and Its Application to Synchronization Problems, IEEE Trans

Ngày tải lên: 19/06/2014, 19:20

... IEEE Transactions on Communications, Vol 47, No 10, (Oct 1999), pp.1458-1461, ISSN 0090-6778 Rappaport, T S (2002) Wireless Communications: Principles and Practice (2nd Edition), Prentice Hall, ... for Broadband Wireless Communications, John Wiley, ISBN 978-0-471-21479-3, New Jersey, USA Godara, L C (1997) Application of Antenna Arrays to Mobile Communications II Beam-Forming and Direction-of-Arrival ... Foschini, G J & Gans, M J (1998) On Limits of Wireless Communications in a Fading Environment when Using Multiple Antennas Wireless Personal Communications, Vol.6, No.3, (March 1998), pp.311-335,

Ngày tải lên: 19/06/2014, 19:20

... modulation type and order, the pulse shapeand the packet format So that, if this information is not accurate, then the matched filterperforms poorly However, since most wireless networks systems ... the random variable m stands for the required number of samples needed to terminate the test As stated in Wald (2004) it is possible to neglect the excess on thresholdAandB,hence the the random ... real environment and its variation, while it is shown inmany publications and realistic measurements that such environments change frequently,especially in highly build areas Understanding how particular

Ngày tải lên: 19/06/2014, 19:20

... t, and Hb k l, , of size N r k×N t b represents the channel between user k and BS , b b=1, ,B on subcarrier l The channel H H , where ρb k, represents the long-term power gain between BS b and ... r, , 1 k 1 and the power loading coefficient is computed only per user and subcarrier In this case to compute the power allocation coefficients we should replace λk i l, , by αk l, and remove ... Cent per-BS SOIPA and Cent per-BS OPA are still very close but both are degraded from Cent TPC OPA (about 0.5dB at BER=10-3) and also there is 0.5dB gap among these curves and Cent per-BS SOCPA

Ngày tải lên: 19/06/2014, 19:20

... 4prabability and handoff dropping probability To reduce the complexity, we focus on voice services in the integrated WLAN and 3G UMTS cellular networks, with fixed total channels in UMTS cell and bandwidth ... for both new calls and vertical handoff follows Poisson distributions, and the channel holding time for both vertical handoffs and new calls are exponentially distributed Let λn and 1 /μndenote ... ≤ + ≤m n C}, where m and n are the numbers of admitted new calls and admitted vertical handoffs in the cell, respectively The traffic intensity of vertical handoffs ωv and traffic intensity

Ngày tải lên: 19/06/2014, 19:20

... monetary cost the handover decision does not take account to the RSS, the distance and the QoS criteria on UMTS network. Recent Advances in Wireless Communications and Networks 232 () ... in Wireless Communications and Networks 234 The mobile node’s location information is used to initiate handovers, that is, when the distance of the MN from the centre of the cell of the candidate ... Computer Communications and Networks (ICCCN), pp.1-8, August 2010 Balasubramaniam S & Indulska J (2004) Vertical handover supporting pervasive computing in future wireless networks,

Ngày tải lên: 19/06/2014, 19:20

... Standard for Local and metropolitan area networks Part 16: Air interface for fixed broadband wireless access systems IEEE Std 802.21-2008 (2008) IEEE Standard for Local and metropolitan area networks ... near future, wireless accessnetworks will be composed of diverse wireless medias To exploit wireless media diversity in expected access networks, some bandwidth-aggregationmethods in wireless media ... Trang 4Recent Advances in Wireless Communications and Networks 262 but it consumes less bandwidth Table 7 includes the average times for a multiple-file transmission and the corresponding confidence

Ngày tải lên: 19/06/2014, 19:20

... At a Glance 301 Trang 14Recent Advances in Wireless Communications and Networks Trang 15Wireless Sensor Network: At a Glance 303 Wireless Sensor Networks we need these things in operating system ... related to wireless sensor nodes (Tatiana), except this a comprehensive listing of existing wireless sensor nodes is presented Trang 12Recent Advances in Wireless Communications and Networks 300 ... Area Networks, Part 16: Air Interface for Fixed Broadband Wireless Access Systems, 2004 IIEEE Std 802.16e-2005 (2005) Local and Metropolitan Area Networks, Part 16: Air Interface for Fixed and

Ngày tải lên: 19/06/2014, 19:20

... Trang 3Wireless Sensor Network: At a Glance 321 Trang 4Recent Advances in Wireless Communications and Networks 322 Fig 4 Security threats and their usual defenses in Wireless Sensor Networks ... Scenario: Prospects and Challenges, Proceedings of National Conference on Wireless Communication and Networking (WINCON), pp 138-148 Trang 8Recent Advances in Wireless Communications and Networks 326 ... J.N and Kamal, A.E (2004) Routing Techniques in Wireles Sensor Networks: A Survey, IEEE Wireless Communications (J), pp 06-28 Karl, H and Willig, A (2006) Protocols and Architectures for Wireless

Ngày tải lên: 19/06/2014, 19:20

... of VoIP and non-VoIP connections is represented by r and s, respectively Additionally, BW T and BW R represent the overall and the reserved bandwidth, while BW and 1 BW represent the bandwidth ... index i corresponds to different service types and can take values 1 and 2 for VoIP and non-VoIP traffic, respectively In case that the system bandwidth suffices to serve the flows of all service ... Poutmin and Poutmax, depending on the available system bandwidth In the extreme case that we have no available bandwidth, the overall outage probability becomes Poutmax Adversely, when the total bandwidth

Ngày tải lên: 19/06/2014, 19:20

... and magnitude set the energy demands place upon the power supply Meanwhile, the time mask and slopes of the communication burst are relevant to control the switching harmonics of the signal and, ... source and the wireless systems is only a matter of electromagnetic compatibility standards, electrostatic discharges and security regulation 3.2 Systems, component and devices for wireless power ... and are the following: - Period and duty cycle of the consumption (t1, t2) - Magnitude of the consumption (IPEAK, ILOAD, ISTANDBY) - Time mask and slopes of the communication burst Fig 2 Power

Ngày tải lên: 19/06/2014, 19:20

... collected data 3.2 Communication design of the wireless structural health monitoring system To ensure reliable wireless communication between the server and the wireless units, the communication ... designed for the wireless structural control system Fig 12 illustrates the communication state diagrams of a coordinator unit and other wireless units within a wireless sensing and control subnet ... coordinator and other units are in State 2 Wireless Sensor Nodes Wireless Control Nodes Sensor Collect and send sensor data Receive sensor data Controller Control device Wireless Communication

Ngày tải lên: 19/06/2014, 19:20

... applications to speakers and vibrational devices have been advanced (see Fig 5) (Chiba et al., 2007a) This device may be suitable for vibrators and speakers of wireless communication devices In ... utilizing natural energies such as up-and-down motions of waves, slowly flowing river water, human and animal movements, and vibration energies produced from vehicles and buildings 4.1 Principal of ... cycle of stretching and contraction is Trang 6where C 1 and C 2 are the total capacitances of the dielectric elastomer films in the stretched and contracted states, respectively, and V b is the

Ngày tải lên: 19/06/2014, 19:20

... References and Suggested Reading 407 William R Kem 17.1 Poisons, Toxins, and Venoms 409 17.2 Molecular and Functional Diversity of Natural Toxins and Venoms 410 17.3 Natural Roles of Toxins and Venoms ... System 152 7.7 Summary 154 References and Suggested Reading 155 8 Dermal and Ocular Toxicology: Toxic Effects of the Skin and Eyes 157 William R Salminen and Stephen M Roberts 8.1 Skin Histology ... of Pharmacology and Toxicology, University ofUtah, Salt Lake City, Utah vi CONTRI BUTORS Trang 6Robert C James, Stephen M Roberts, and Phillip L Williams 1.1 Basic Definitions and Terminology

Ngày tải lên: 09/08/2014, 16:20

... The linear two-compartment open model, where C1 and C2 are the concentrations in the central and peripheral compartments, respectively, and k12 and k21 are the rate constants for transfer between ... the organs andtissue groups and mixed venous blood returning to the lung to be reoxygenated Organs of entry (lung,liver), excretion (kidney, intestine, lung), and metabolism (liver), and tissue ... absorption of ionizable organic acids and bases as well as on specific and host-related factors such as lipid solubility and molecular size, the presence ofvilli and microvilli in the intestine, the

Ngày tải lên: 09/08/2014, 16:20

... power bandwidth. Similarly, we can also define other percentage power bandwidths,suchas90 percentage power bandwidth, 50 percentage power bandwidth,and so on. After having defined the signal bandwidth, ... current 3G (and maybe beyond 3G as well) wireless networks and communications. In the following subsections, we will discuss the three major spread spectrum techniques, namely, DS, FH, and time ... value to a level 3 dB lower than the peak. This bandwidth 40 FUNDAMENTALS OF WIRELESS COMMUNICATIONS is also called 3-dB bandwidth. The signal bandwidth can also be defined as the spectral width,

Ngày tải lên: 09/08/2014, 19:22

... with wireless metropolitan area networks (WMANs), WLANs, wireless personal area networks (WPANs), and so on. Trang 25112 FUNDAMENTALS OF WIRELESS COMMUNICATIONSDatagram Packet Switching Networks, ... via I channel and its pilot via Q channel in a quadrature modulator, Trang 15102 FUNDAMENTALS OF WIRELESS COMMUNICATIONSof CC code= 4 × 16, and user number = 4 such as QPSK and and so on Because ... OCC-CDMA system, whereT d1 and T d2 denote downlink pilot burst duration and repeating period, respectively; and T u1 and T u2 stand for the uplink pilot burst duration and repeating period, respectively

Ngày tải lên: 09/08/2014, 19:22