GSM technology

The main point of GSM technology are :

•Coverage planning

•Antenna selection、parameter design、installation

•Capacity planning

•Base station survey

•ASSET planning software

•Frequency planning

•Parameter design

Coverage planning is to be performed in the cell planning phase.  In the coverage planning phase, we need to know the requirements in coverage planning and know the coverage area’s special property.

Link budget should be taken into account.  Proper frequency reuse and understanding the interferences should be carefully considered.

1.Coverage planning 

•Coverage requirements

-plan of coverage district

•analysis

-city、town、rural，plain、a mountains area etc.

-Field Strength of the Edge of the Coverage Area and coverage rate

-sensitivity、decade protection、loss、frequency band diversity

•Power budget

-evaluating balance of upling and downlink

•Special region analysis

high building，underground，tunnel,etc  

 -The Area type in large city so we can make a prediction that

With dense population, developed economy, large traffic. In the center of the city, high buildings stand in great numbers, and the shopping center is flourishing.

-The area type in Middle-size city ,the prediction is

With comparatively dense population, rather developed economy, fairly large traffic. In the center of the city, stand the dense buildings. The shopping center is rather flourishing and very promising.

-The area type in small town ,the prediction is : 

With a big population, promising economic development, moderate amount of traffic. In the center of the town, buildings stand rather densely. The shopping center has a certain scale and rather promising.

-The area type in country side ,the prediction is : With a population in low density, developing economy and rather low traffic.

-The area type in Main traffic road ,the prediction is : 

In the connection area between the above-mentioned areas, there are small traffic in these area.

Requirements:

1)C/I≥9dB，C/A≥-9dB ( In actual engineering environment, C/A≥-12dB )

2)90% of the coverage area should be inside the PLMN coverage area.  Within the coverage area, MS should be able to access the network 99% of the time.  

• macrocell

-coverage radius 1km ~10km，often useful macocell。

• microcell

-coverage radius 500~1000m，can 。

• Picocell

-around coverage radius 200m，solute point coverage area capacity and indoors coverage.

• Extended macrocell

-coverage exceed 35km，main use low traffic and open area ，example sea、grassland。