Q5) Assuming that a = 39, what is the queuing delay? Give your answer in milliseconds (ms) Assume a constant transmission rate of R = 300000 bps, a constant packet-length L = 1600 bits, and a is the average rate of packets/second. Traffic intensity I = La/R, and the queuing delay is calculated as I(L/R)(1-1) for I < 1.

Q5) Assuming that a = 39, what is the queuing delay? Give your answer in milliseconds (ms) Assume a constant transmission rate of R = 300000 bps, a constant packet-length L = 1600 bits, and a is the average rate of packets/second. Traffic intensity I = La/R, and the queuing delay is calculated as I(L/R)(1-1) for I < 1.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Q2. (a) Two towns 20km apart are connected by a microwave data link. Data is sent across the link in 800 byte frames and the link operates at a data rate of 120Mbps. Assuming the link has a bit error rate of 4 x 10-5, and a velocity of propagation v = 3 x 10$ m/s, determine the link utilisation efficiency using the following protocols: (i) Idle RQ (ii) Selective repeat RQ with a send window buffer k=2. (iii) Suggest a way to increase the link utilisation of the Selective repeat RQ scheme. Discuss potential disadvantages of such an approach.
Data communication systems. The solution time of the problem is 10 minutes. In an FDMA-based multiple access system, each user is assigned an 80 kHz channel for full-duplex communication. There are 1000 channels in total in the system.Depending on the information given above, if the initial frequency of the frequency spectrum used by the FMDA system in one direction is 1000 Mhz, the carrier frequency of the channel belonging to the first user is 1.000.040 KHz.A) False B) True
5 points Find the latency of Token Ring (in bits) where data rate of link is 20 Mbps and 40 stations separated by 100 meters and bit delay at each station is 1 bit. (Assume propagation speed as 2x105 m/sec)
question
In an asenkron transmission a character size is 5 bits. In this transmission, if total overhead amount is 8,05 Kbit and total data size is 19,55 Kbit, which answer is correct? O a. Stop Bit = 1 Parity = "Odd" Amount of transmitted characters = 2700 O b. Stop Bit = 1 Parity = "Even" Amount of transmitted characters = 2400 O c. Stop Bit = 1,5 Parity = "Even" Amount of transmitted characters = 2300 O d. Stop Bit = 1,5 Parity = "No" Amount of transmitted characters = 2000 O e. Stop Bit = 2 Parity = "Even" Amount of transmitted characters = 2200
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Assume the following parameters for Go-Back-N (GBN): a) N = 5 b) Round Trip Time (RTT) = 10 milliseconds c) Retransmission Timeout period = 40 milliseconds d) Segment Size = 3300 bytes. Suppose that a sender sent 15 data segments, numbered 1 through 15, to a receiver using the GBN mechanism. Suppose that data segment 4 and data segment 10 were lost the first time the sender sent the segments (but reached the receiver correctly when retransmitted). Apart from the above, there were no other segment losses. What is the average throughput obtained in sending all the data segments (in bytes/sec)? Draw a diagram to show the communication of the segments in detail.
The Amplitude Modulation (AM) is a technique used in communication for transmitting information via radio carrier wave. AM works by varying the amplitude of the transmitted signal in relation to the information being sent. The equations of the carrier signal, the original signal to send, and the modulated signal combining the two signals are respectively: VI-V sin (2πƒct) V2=Vm sin (2πfmt) V3=Vcsin (2πfct)+ Vm sin (2πfmt)* sin (2nfct) C Supposing that Vc =Vm=1, fc-20, fm=1. Write a MATLAB program that plots the three signals with single call, the graphs must be contain (desired title, axis labels, annotations, with symbols for color, style, and marker) for each graph. Use the step 0.0025 for the time.