Suppose users share a 8.4 Mbps communication link. Also suppose that the traffic generation process of...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
Suppose users share a 8.4 Mbps communication link. Also suppose that the traffic generation process of each user alternates (independently of the other users) between periods of activity (active modes) when the user generates data at a constant rate of 350 Kbps and periods of inactivity (inactive mode) when the user generates no data. Suppose further that the user is active (independent of other users) only 20 percent of the time. (1) When fixed-assigned time division multiplexing (TDM) is used to allocate re- sources on the shared link, how many users can be supported? (2) Given that your answer obtained in (1) is equal to X. Suppose now that users are supported by a communications channel which is shared on a statistical multiplexing manner. Assume that the communications channel is used to sup- port a number of users that is 3 times the number of users supported under the fixed-assigned TDM operation. This setting can be model with a binomial dis- tribution and approximated with a Gaussian distribution with the same mean and variance. Compute the exact probability that more than X users are si- multaneously active using a binomial distribution, (Hint: use calculator with function, matlab, excel or other computer aid and simplify to 1 - Pr{X or less users are active simultaneously}). (3) Use normal distribution to approximate the probability that more than X users are simultaneously active, (Hint: use the midpoint between X and X+1 for a better approximation. pdf/pmf 0.15 0.1 0.05 Binomial vs Gaussian Distributions -Gaussian(np, npq) Binomial(n, p) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 active users Suppose users share a 8.4 Mbps communication link. Also suppose that the traffic generation process of each user alternates (independently of the other users) between periods of activity (active modes) when the user generates data at a constant rate of 350 Kbps and periods of inactivity (inactive mode) when the user generates no data. Suppose further that the user is active (independent of other users) only 20 percent of the time. (1) When fixed-assigned time division multiplexing (TDM) is used to allocate re- sources on the shared link, how many users can be supported? (2) Given that your answer obtained in (1) is equal to X. Suppose now that users are supported by a communications channel which is shared on a statistical multiplexing manner. Assume that the communications channel is used to sup- port a number of users that is 3 times the number of users supported under the fixed-assigned TDM operation. This setting can be model with a binomial dis- tribution and approximated with a Gaussian distribution with the same mean and variance. Compute the exact probability that more than X users are si- multaneously active using a binomial distribution, (Hint: use calculator with function, matlab, excel or other computer aid and simplify to 1 - Pr{X or less users are active simultaneously}). (3) Use normal distribution to approximate the probability that more than X users are simultaneously active, (Hint: use the midpoint between X and X+1 for a better approximation. pdf/pmf 0.15 0.1 0.05 Binomial vs Gaussian Distributions -Gaussian(np, npq) Binomial(n, p) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 active users
Expert Answer:
Answer rating: 100% (QA)
SOLUTION 1 When fixedassigned time division multiplexing TDM is used to allocate resources on the shared link we need to consider the bandwidth requir... View the full answer
Related Book For
Computer Networking A Top-Down Approach
ISBN: 978-0136079675
5th edition
Authors: James F. Kurose, Keith W. Ross
Posted Date:
Students also viewed these accounting questions
-
Predict the major organic compounds (A-E) in the following reactions. (i) H A 2CH3CH2OH (ii) CI (iii) (iv) OH (v) H2, Pd BaSO4, Heat 1. Mg, CH,Br, Ether C 2. HO, H+ Dil K2CrO4, H* D B (CH3CH2)2NH E
-
Suppose users share a 2 Mbps link. Also suppose each user transmits continuously at I Mbps when transmitting, but each user transmits only 20 percent of the time. (See the discussion of statistical...
-
Suppose users share a 3 Mbps link. Also suppose each user requires I50 kbps when transmitting, but each user transmits only 10 percent of the time. (See the discussion of statistical multiplexing in...
-
Determine how current values might be determined for investments, land, buildings, equipment, patents, copyrights, trademarks, and franchises. How might the use of current values in the accounting...
-
From your results in Prob. 1732, show that to meet a fatigue factor of safety n1 the optimal solution is
-
You are an accountant with a practice that includes a large proportion of individual clients, who often ask for information about traded investments. You have extracted the following data from a...
-
The accountant for Fast Deliveries Ltd accumulates the following data concerning a mixed cost using kilometres as the activity level. Required Compute the fixed and variable cost elements using the...
-
The following operating information reports the results of McKinney Company's production and sale of 16,000 air-conditioned motorcycle helmets last year. Based on early market forecasts, McKinney...
-
Why is the course developmental psychology an important pre-requisite for psychopathology course. Why is knowing developmental psychology important in diagnosis?
-
You are Maria Herrera and have been recently promoted to the position of director of financial analysis for a medium-size consumer goods firm. During your first few weeks on the job, you took the...
-
Let A = {5, 6), B = {5, 7, 8} and S = {n : n 3 is an odd integer). A relation R from A x B to S is defined as (a, b) R s if s | (a + b). Is R a function from A x B to S?
-
Answer each question in a thorough, well-supported and explained response. 1. Define demand. What does the law of demand state? Express it in words, in symbols (clip art or images), and as a graph....
-
A tensile member made of AISI 1020 hot-rolled steel is being designed for a car. It must withstand a repeated load of 4200 N and not elongate more than 0.12 mm in its 630-mm length. Use a design...
-
Three students Tom, Jack and Billy are discussing why the two-dimensional velocity field can be represented solely by a scalar here. Tom thinks this representation assumes a high Reynolds number...
-
An employee working in a room measuring 15 ft x 20 ft x 15 ft sprays paint assembly parts using a paint containing hexane. The PEL for hexane is 500 ppm. The employee wears a half-face, air-purifying...
-
Using the sinking fund Table 13.3, complete the following: Note: Do not round intermediate calculations. Required amount $ Frequency of Length of payment time 8 years 15,000 Annually Interest rate 8...
-
In the long run, the monopolist can earn A. zero or positive economic profit. O B. only negative economic profit. OC. only zero economic profit. OD. None of the above. Refer to the graph to the...
-
The senior management at Davis Watercraft would like to determine if it is possible to improve firm profitability by changing their existing product mix. Currently, the product mix is determined by...
-
Consider a scenario in which Host A and Host B want to send messages to Host C. Hosts A and C are connected by a channel that can lose and corrupt (but not reorder) messages. Hosts Band C are...
-
Consider a scenario in which Host A wants to simultaneously send packets III Hosts Band C. A is connected to Band C via a broadcast channel-a packet sent by A is carried by the channel to both Band...
-
in Section 3.5.4, we saw that TCP waits until it has received three duplicate A Ks before performing a fast retransmit. Why do you think the TCP designers chose not to perform a fast retransmit after...
-
a. Assume that \(y_{1}, \ldots, y_{n}\) are i.i.d. with a negative binomial distribution with parameters \(r\) and \(p\). Determine the maximum likelihood estimators. b. Use the sampling mechanism in...
-
For the data in Table 12.1, confirm that the Pearson statistic in equation (12.3) is 41.98 . Table 12.1 (12.3) Count Observed (j) (nj) Fitted Counts Using the Poisson Distribution (np;) 01234 6,996...
-
Show that the log-likelihood in equation (12.2) has a maximum at \(\widehat{\mu}=\bar{y}\). n L() Inf(y,) = (-+y; In - In y;!). i=1 i=1 (12.2)
Study smarter with the SolutionInn App