A subscriber makes a two-minute call a...

单项选择题A subscriber makes a two-minute call and a four-minute call during the busy hour. How much traffic does he generate for that hour? （）

A.33 millierlangs
B.66 millierlangs
C.100 millierlangs
D.10 millierlangs
E.25millierlangs

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1.单项选择题Reusing frequencies in a cellular pattern (compared to “one big cell”)（）

A. Increases channel utilization, cost ,and interference.
B. Increases capacity and cost, but decreases interference.
C. Increases capacity, but decreases cost and interference.
D. Increases capacity, cost, and interference.

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2.单项选择题Which cell pattern is recommended to use when using frequency hopping? （）

A.4/12
B.3/9
C.7/21
D.7/7

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3.单项选择题Which of these is not a prediction model for radio coverage? （）

A.Algorithm-9999
B.Cost-231
C.Okumura-Hata
D.Printhana
E.Walfish-Ikegami

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4.单项选择题Which of these assumptions is necessary to use in system balance? （）

A.The sensitivity is the same for the MS and the BTS.
B. The path loss is the same for the MS and the BTS.
C. The feeder loss is the same for the MS and the BTS.
D. The antenna gain is the same for the MS and the BTS.
E. The combiner loss is the same for the MS and the BTS.

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5.单项选择题What is system balance? （）

A. Each cell can handle the same amount of subscribers
B. The network is dimensioned for all mobile classes
C. All cells are of the same size
D. All BTSs use the same output power
E. Uplink and downlink coverage is the same

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6.单项选择题A particular cell is expected to support 6 Erlangs of traffic at 1% Grade of Service. How many traffic channels are required?（）

A. 6
B. 13
C. 3
D. 15
E. 22

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7.单项选择题Which logical channel must be dimensioned for each cell when considering the call set-up frequency? （）

A.SACCH
B.SDCCH
C.FCCH
D.SCH
E.BCCH

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8.单项选择题Which type of interference is produced by other transmitters on the same frequency? （）

A. Double interference
B. Co-channel interference
C. Adjacent channel interference
D. Reflected interference
E. Timing interference

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9.单项选择题A cell has 3 TRUs with an SDCCH/8 configuration. What is themaximum number of telephone calls it can support simultaneously with ahalf-rate vocoder? （）

A. 22
B. 44
C. 8
D. 3
E. 46

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10.单项选择题How many ARFCNs can an operator use if allocated 15 MHz uplink and 15 MHz downlink (minus one for guardband)? （）

A.14 ARFCNs
B.15 ARFCNs
C.29 ARFCNs
D.75 ARFCNs
E.74 ARFCNs

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