... Headers and trailers are control data added at the beginning and the end of each data unit at each layer of the sender and removed at the corresponding layers of thereceiver They provide source and ... layer b Error correction and retransmission: data link and transport layers Trang 7d Responsibility for carrying frames between adjacent nodes: data link layer19 a Format and code conversion services: ... presentation layer b Establishing, managing, and terminating sessions: session layer c Ensuring reliable transmission of data: data link and transport layers d Log-in and log-out procedures: session layer
Ngày tải lên: 12/04/2023, 21:01
Data communications and networking
... Trang 1DATA COMMUNICATIONSAND NETWORKING Second Edition FM Page i Wednesday, February 23, 2000 2:30 PM Trang 2FM Page ii Wednesday, February 23, 2000 2:30 PMTrang 3DATA COMMUNICATIONSAND NETWORKING ... Choice 60 Exercises 63 Chapter 4 Signals 65 4.1 ANALOG AND DIGITAL 65 Analog and Digital Data 66 Analog and Digital Signals 66 4.2 APERIODIC AND PERIODIC SIGNALS 66 Periodic Signals 67 Aperiodic ... 5 Encoding and Modulating 91 Chapter 6 Transmission of Digital Data: Interfaces and Modems 139 Chapter 7 Transmission Media 187 Chapter 8 Multiplexing 231 Chapter 9 Error Detection and Correction
Ngày tải lên: 24/10/2017, 13:15
Communications and Networking Part 4 pot
... ISSN: 0018-9448 Standard ECMA-368 High Rate Ultra Wideband PHY and MAC Standard, 3rd edition, Dec 2008 Trang 2Tse, D N C & Viswanath, P (2005). Fundamentals of Wireless Communications., U.K.: ... 3High Throughput Transmissions in OFDM based Random Access Wireless Networks Nuno Souto1,2, Rui Dinis2,3, João Carlos Silva1,2, Paulo Carvalho3 and Alexandre Lourenço1,2 to complete the transmission ... a BS, which is responsible for running most of the calculations and to handle transmission collisions The BS detects collisions and uses a broadcast control channel to send a collision signal,
Ngày tải lên: 20/06/2014, 11:20
Communications and Networking Part 5 pptx
... subcarrier matching and power allocation h λ = − (23) 0 , h λ where P s i up, and P r j up, are the power allocations for i and j at the source and the relay The parameters λs and λr can be obtained ... matching and power allocation is optimal joint subcarrier matching and power allocation In following subsection, by separating subcarrier matching and power allocation, the optimal solution of ... are denoted as hs,1 and hs,2, and the channel power gains over the relay-destination channel are denoted as hr,1 and hr,2 Without loss of generality, we assume that hs,1 ≥ hs,2 and hr,1 ≥ hr,2,
Ngày tải lên: 20/06/2014, 11:20
Communications and Networking Part 9 pot
... mobile broadband services at prices and speeds comparable to fixed broadband Though there are often data caps on mobile broadband services that are lower than those of fixed broadband, some consumers ... Efficient protocols and outage behavior, IEEE Transactions of Information Theory 50: 3062–3080 Liu, K J R., Sadek, A K., Su, W and Kwasinski, A (2009) Cooperative Communications and Networking, Canbridge ... on Wireless Communications Letters 8: 2783–2788 Suraweera, H., Louie, R., Li, Y., Karagiannidis, G and Vucetic, B (2009) Two hop amplify-and-forward transmission in mixed Rayleigh and Rician
Ngày tải lên: 20/06/2014, 11:20
Communications and Networking Part 13 potx
... hardware, bandwidth, and channel conditions If we assume a basic link rate of 1 Mb/s (control frames are recommended to be transmitted at the basic link rate in narrow-band as well as broadband 802.11 ... minimum and maximum sizes of the contention window of a node are 32 and 1024 timeslots, respectively, while a timeslot is 20μs In addition, the retransmission limits are 7 and 4 for a RTS frame and ... performance of the modified protocol The nodes in the network have random waypoint movement and have a minimum and a maximum speed of 1.0 and 5.0 m/s, respectively (the average pause time is 0.5 second)
Ngày tải lên: 20/06/2014, 11:20
Communications and Networking Part 14 potx
... Kij 2 σ ij and q = 1 2 , (7) 394 Communications and Networking 4 Ranging post-processing... measurements under both LOS and nonLOS channel conditions, ultra-wideband (UWB) and chirp ... themselves and that a server is available to run the LT engine, the LT problem reduces to 390 Communications and Networking find the position of the... Sensitivity to NLOS Wideband Wideband Narrowband ... provider of The Cloud and accordingly is a service provider in the wireless city. However Communications and Networking 386 customers now make Skype calls in some mobile handsets, which means
Ngày tải lên: 20/06/2014, 11:20
Communications and Networking Part 15 pot
... acceptable for GPS data Binary files were converted to text file for easy handling and processing For GPS data storage and transmission, the most generally used GPS exchange data type is the RINEX ... stations across New Zealand All seismic and GPS data are transmitted continuously to two data centers using radio, land-based or VSAT systems employing Internet Protocol data transfer techniques ... space and transmission bandwidth requirements as only the difference between the current observation data and the first occurrence of it is stored 3 Sumatran cGPS array - introduction and configuration
Ngày tải lên: 20/06/2014, 11:20
... location aware vehic-ular architecture standardized by ETSI, commonlyreferred to as geonetworking, and then describes indetail how IPv6 datagram transmission and standardIPv6 stateless address autoconfiguration ... Abstract In this article we make a thorough char-acterization and evaluation of the solution standard-ized by the European Telecommunications Standards Institute for IPv6 transmission of packets over ... accidents, improve the efficiency and comfort of road transport, and also enhance the passengers’ communications experience Although many applications of vehicular communications were already identified
Ngày tải lên: 20/06/2014, 20:20
Báo cáo toán học: " An overview of learning mechanisms for cognitive systems EURASIP Journal on Wireless Communications and Networking " pot
... essential to clarify that the term “data sample” differs from the term “data” in the fact that a data sample consists of more than one data In fact, each data sample is a combination of values, ... Fully formattedPDF and full text (HTML) versions will be made available soon. An overview of learning mechanisms for cognitive systems EURASIP Journal on Wireless Communications and Networking 2012, ... Learning mechanisms also provide the ground for enabling proactive handling of problematic situations, i.e identifying and handling issues that could undermine the performance of the system before
Ngày tải lên: 20/06/2014, 20:20
Communications and Networking Part 8 ppt
... having a mean µ and a standard deviation Σ Table 3 shows that the different states of the Markov chain depend on the elevation angles and that each state has its specified mean and standard deviation ... Land Mobile Radio Communications, Commission of European Communities, Directorate General, Telecommunications Information Industries and Innovation, Luxemburg Khalighi M A., Hélard J.-F., and ... propagation data at L-band (1542 MHz) for mobile satellite communications, Proc of IEEE Vehicular Technology Conference, pp 51-56, ISSN: 1090-3038, May 1991, Saint Louis, USA Trang 7fractional bandwidth
Ngày tải lên: 21/06/2014, 01:20
Communications and Networking Part 10 docx
... designed for non-real-time data transmission service such as FTP, the QoS parameters contains minimum reserved data rate and maximum sustained data rate Unlike rtPS and UGS, which required the ... López-Ferreras, and G Esteve-Asensio (2009) Novel Heuristics for Cell Radius Determination in WCDMA Systems and Their Application to Strategic Planning Studies, EURASIP Journal on Wireless Communications and ... optimization problem the DIRECT and a hierarchic two step optimization combined with genetic algorithm The methods are introduced and investigated for 1,2, 3 and 6 AP cases The influence of Genetic
Ngày tải lên: 21/06/2014, 01:20
Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume pptx
... Communications, vol 6, no 4, pp 13–18, 1999 [3] H Schwarz, D Marpe, and T Wiegand, “Overview of the scalable video coding extension of the H.264/AVC standard,” IEEE Transactions on Circuits and ... test scenarios with N = 128 subcarriers,C = {1, 2, 4, 6}, andrmin=50,rmax =200 for each user and K = 3 and K = 4 users, respectively, and using the channel model described in Section 5.2 for over ... with N = 3 subcarriers, K = 2 users, P T = 3, C = {3, 5}and let rmin and rmax be 2 and 5, respectively, for both users Considering the randomly generated vectors e = [e1,1,1, , e1,1,C,e1,2,1,
Ngày tải lên: 21/06/2014, 05:20
Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume pdf
... Rx and Tx, respectively By choice, the intercluster parameters pc, φ A c, and τc are parametersac,k,φ A c,k,φ D c,k, andτc,k The matrices BRx, W, and BTxare built from submatrices BRx c , Wc, and ... measured location of the Tx and Rx The calibration of the network analyzer is done at the connectors of the Tx and Rx antenna and as such includes both the RF/optical link and the amplifier Measurements ... which stretches horizontally top and bottom in the figure All inner walls are plasterboard, except for the concrete walls between rooms 118 and 120, and of the Tx and Rx during measurements A total
Ngày tải lên: 21/06/2014, 05:20
Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume docx
... p=TDATA+ SIFS, T a=TBAR+TB-ACK+ 2·SIFS, (4) whereTDATA,TBAR, andTB-ACKare durations of DATA, BAR and B-ACK transmissions, SIFS and DIFS are interframe spaces specified in the IEEE 802.11 standard; ... J0) we estimate PLR and throughput for every recipient by (12), (14) and (17) and check if QoS requirements (1) and (2) are met In this way we form an admitted region ofT, B and J. InFigure 5, ... there are a lot of other data in it Forming the DL- and UL-MAP, the base station allocates the necessary channel to transmit a multicast data burst in the downlink subframe and to receive ACKs from
Ngày tải lên: 21/06/2014, 05:20
Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume potx
... Both open loop and closed loop MIMO (open loop and closed loop MIMO correspond to the MIMO systems without and with channel state information at the 3GPP LTE However, the closed loop solution provides ... open loop MIMO and closed loop for SU and MU MIMO schemes versus the number of active users in the cell Both the simulation results and the analytical results for the open loop and the linearly ... Precoded LTE Downlink Multiuser MIMO Zihuai Lin,1Pei Xiao,2and Yi Wu1 1 Department of Communication and Network Engineering, School of Physics and OptoElectronic Technology, Fujian Normal University,
Ngày tải lên: 21/06/2014, 05:20
Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume pot
... Choi, and T Keller, OFDM and MC-CDMA for Broadband Multiuser Communications, WLANs and Broadcasting, IEEE Press-John Wiley & Sons, New York, NY, USA, 2003 [2] L Hanzo and T Keller, An OFDM and ... [−1, 1] and the difference in values of this parameter and some other randomly chosen food source Suppose that each solution consists of n parameters, and let x i = (x i1,x i2, , x in) be a solution ... iterations then employed bee abandons that food source, and it becomes a scout and search for a new food source randomly This assigns a random food source to this scout, and it becomes employed After
Ngày tải lên: 21/06/2014, 06:20
báo cáo hóa học:" Performance assessment of IP over vehicular delay-tolerant networks through the VDTN@Lab testbed EURASIP Journal on Wireless Communications and Networking 2012, 2012:13 " pptx
... the data plane), and routing The data plane functions that deal with data bundles are executed in BAD These functions include data bundles aggregation/de-aggregation, queuing and scheduling, and ... uses a low-power, low bandwidth, and long-range link, and it is always active to allow node discovery The data plane uses high-power, high bandwidth, and short-range link, and it is only active ... approach; (ii) end-to-end, asynchronous, and variable-length bundle oriented communication; and (iii) separation between control and data planes using out-of-band signaling Different to DTN architecture
Ngày tải lên: 21/06/2014, 17:20
Data communications and computer networks a business users approach 7th edition curt white test bank
... 1Chapter 2: Fundamentals of Data and SignalsTRUE/FALSE 1 The terms “data” and “signal” mean the same thing 2 By convention, the minimum and maximum values of analog data and signals are presented ... network It is important to understand that the terms “data” and “signal” do not mean the same thing, and that in order for a computer network to transmit data, the data must first be converted into ... modulates digital data onto an analog signal and then demodulates the analog signal back to digital data is a 26 Three currently popular modulation techniques for encoding digital data and transmitting
Ngày tải lên: 19/10/2017, 16:27
Managing for quality and performance excellence 10th edition by evans and lindsay solution manual
... PracticesEnsuring that data and information are sufficiently accurate and reliable. Making data accessible to those who need it. Analyzing data and information using valid methods. Making decisions and taking ... Management Link full download solution manual: excellence-10th-edition-by-evans-and-lindsay-solution-manual/ Trang 2https://findtestbanks.com/download/managing-for-quality-and-performance-Quality Culture ... PracticesResearching and understanding customer needs and expectations. Ensuring that the objectives of the organization are linked to customer needs and expectations. Communicating customer needs and expectations
Ngày tải lên: 28/02/2019, 14:42