A cell-phone carrier is allocated 642 radio frequencies to operate in a city with a hexagon pattern cell design. 42 of the frequencies is reserved for control channel and each phone call uses 2 frequencies per call (1 for transmitting and 1 for receiving). In an advance mobile phone service, use the frequencies distribution to answer the following question. If the distance between centers of adjacent cells is 2km and the minimum distance between centers of cells with the same cochannel is 7km, Calculate the area of each cell. Answer: 165,95,55
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- A cell-phone carrier is allocated 642 radio frequencies to operate in a city with a hexagon pattern cell design. 42 of the frequencies is reserved for control channel and each phone call uses 2 frequencies per call (1 for transmitting and 1 for receiving). In an advance mobile phone service, use the frequencies distribution to answer the following question. if the distance between centers of adjacent cells is 2km and the minimum distance between centers of cells with the same cochannel is 7km. Calculate the area of each cell.Q1:For the network of figure, determine: 1-IB ,Ic ,B,VCE . if hie=1.6KQ, hre=2*10-4, hfe=110 and hoe=20ps. 2-S(Ico) ,S(VBE) ,S(B) using T1 as the temperature at which the parameter values are specified and B(T2) as 25% more than B(T1). 3-Determine the net change in Ic if a change in operating condition results in Ico increase from 0.2µA to 10HA,VBE drops from 0.7 to 0.5 and ß increase 25%. 4-Find the change in Ic if the temperature increase from 25 to 75 [C'] +16 3 KOhm 20 uF 220 kOhm HH 10 uF 1 k Ohm HE 12k Ohm 120 my 200 Ohm 20 uF 1 kOhn (10] M 10Q1 The main idea behind the Global System Mobile (GSM) cellular radio system is frequency reuse. Due to the increasing demand in the cellular radio, there is a need to increase the capacity of the system. Consider a case where initially, a cluster size of N=7 hexagonal cells is employed by the network planning engineer in Batu Pahat in year 2000. The area is covered by 6 clusters to support full coverage in Batu Pahat area. The allocated spectrum is 35 MHz and the traffic intensity of each subscriber is estimated to be 0.1 Erlang. (a) (b) Calculate the number of users that can communicate simultaneously in Batu Pahat area. Given a Grade of Service (GOS) of 2%, calculate the number of users that can be supported in the Batu Pahat area.
- A city has a population of 3 million people that are evenly distributed over an area of 1000 square km. It is given that a percentage of the population is subscribed to a cellular system. Assume that the cellular system is an Erlang B system with a total band of 14 MHz and full duplex channel bandwidth of 40 kHz and covers the city using hexagonal cells with radius 2 km and a cluster size of 7 cells. Assume that each user makes 1 call every 2 hours with average call duration of 1 minute and the desired probability of call blocking is 0.005. Assume Traffic Intensity per Cell is 36 Erlangs. Find: The total number of cells in the system The number of channels per cell The total number of channels in the system Maximum carried traffic for the whole system The total number of users who can use the system Percentage of Population of the city who can subscribe to the cellular service The theoretical maximum number of users who can be served at any time.A telephone company plans to connect its switching centers together using fiber optics. When connecting switching centers, it is required to have a path between every pair of them. The telephone company is looking for an interconnection topology that minimizes the amount of fiber required to connect its switching centers, describe an algorithm for this case.A six-story office building has 10 adjacent offices per floor. Each office contains a wall socket for a terminal in the front wall, so the sockets form a rectangular grid in the vertical plane, with a separation of 3 m between sockets, both horizontally and vertically. Assuming that it is feasible to run a straight cable between any pair of sockets, horizontally, vertically, or diagonally, how many meters of cable are needed to connect all sockets using a star configuration with a single router in the middle?
- Frieda Millstone and her family live in Roanoke, Virginia, and they are planning an auto vacation across Virginia, their ultimate destination being Washington, DC. The family has developed the following network of possible routes and cities to visit on their trip:The time, in hours, between cities (which is affected by the type of road and the number of intermediate towns) is shown along each branch. Determine the shortest route that the Millstone family can travel from Roanoke to Washington, DC.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) TrueMessages are sent over a communications channel using two different signals. One signal requires 1 microseconds for transmittal, and the other signal requires 3 microseconds for transmittal. Each signal of a message is followed immediately by the next signal. Using the iterative method (you compute each step by hand) calculate how many different messages can be sent in 6 microseconds? (take the initial conditions of the recurrence relation as: S, = 1 and S, = 1, S, = 1) Seç. Seç. The recurrence relation for "the number of different signals that can be sent in "n" microseconds" is:
- How well does a network function when the following three conditions are met? Please, give us a brief summary.You are required to design a UAV LTE Channel Model for Air to Ground (A2G) by using a simulation by MATLAB Software. Base on parameter that had been stated in Table 1. Compare the minimum SINR achieved for SISO cellular networks DISTANCE BETWEEN UAV AND USER (Stationary) 10m 100m 500m ALTITUDE OF UAV 10m 100m 500m Table 1: Parameter of UAV LTE Channel ModelGlobal System for Mobile communication (GSM) uses the band of 890MHz -915 MHz for uplink with 8 channels of 200 KHz. Obtain maximum number of users that could be served in one cell if radius of cell R= 1Km and minimum distance between clusters’ centers is 4.5Km.