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Bài 1: Một hệ thống GSM có các thông số kỹ thuật sau

The document contains two problems related to calculating parameters for cellular network systems. The first problem asks to calculate the total number of cells and spectral efficiency given technical specifications for a GSM system including bandwidth, channel spacing, users per channel, control channels, cell radius and area, call rates, and frequency reuse factor. The second problem asks to calculate the number of calls per hour for a cellular system given call duration, blocking probability, calls per subscriber, and traffic channels, and then determine the total calls per hour if sectoring is used.

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Khoa Duy Pham
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84 views1 page

Bài 1: Một hệ thống GSM có các thông số kỹ thuật sau

The document contains two problems related to calculating parameters for cellular network systems. The first problem asks to calculate the total number of cells and spectral efficiency given technical specifications for a GSM system including bandwidth, channel spacing, users per channel, control channels, cell radius and area, call rates, and frequency reuse factor. The second problem asks to calculate the number of calls per hour for a cellular system given call duration, blocking probability, calls per subscriber, and traffic channels, and then determine the total calls per hour if sectoring is used.

Uploaded by

Khoa Duy Pham
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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Bài 1: Một hệ thống GSM có các thông số kỹ thuật sau:

o One way system bandwidth = 12 MHz


o The channel spacing = 180 kHz
o Each channel is allocated for 9 users
o Three channels per cell are allocated for control channels
o Omidirectional receiver
o Cell radius = 1.7 km, and the total coverage area is 4000 km2.
o Average number of calls /user = 1.2, and the average holding time of a call is 100s.
o Call blocking probability is 3%.
o Frequency reuse factor = 0.25.

1. Calculate total number of cells


2. Calculate the spectral efficiency

Bài 2: Consider a cellular system with the following


data:
 Average call duration: 2.5 mins.,
 Probability of blocking: 1%,
 Average number of call per subscriber: 1 call/hour
 No of traffic channel: 400 for a 7-cell reuse system

Calculate the number of calls per hour. If 120 degree sectoring per cell has been adopted, then
determine the total calls per hour.

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