ZTE Corporation ZXG-OB06 Manuale Utente

 
 

Chapter 5 - Networking Modes and System Configurations 

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and coaxial cables. Satellite links can be used for special transmission 

modes. 

System Configuration 

There are many ways of BS configuration. In general, a proper number 
and types of sites are selected to cater for the requirements of the 

operators as well as the concrete geographical environment, and a 
minimum hardware configuration should be used to meet the maximum 

traffic requirement. 

Number and Types of Sites 

A radio cellular mobile network, according to its frequency resources and 
cell planning, can be divided into a certain number of cells. The cells in a 

cellular system are adjacent to each other, as shown in Figure 69. 

Cell1

Cell3

Cell4

Cell2

Cell5

Cell6

Cell7

Cell9

Cell8

B

 

In the system, each cellular cell is covered by multiple radio channels. If 
an omni-antenna is employed, a base station will be set at the center of 

each cell (as A in the diagram). And if a directional sectorized antenna is 
used, the base station will be established at the intersection of three cells 
(as B in the diagram). Such a base station covers three adjacent cells, and 

in fact it contains at least three TRXs. Usually, a base station in this kind 
of network is called a site. The base site with an omni-antenna covers only 

one cell; while the base site with a directional antenna covers three cells. 

Types of sites: O-type sites and S-type sites, and the models are shown in 

Figure 70. 

 

An O-type site is an omni-directional cell, that is, all the carriers of the 

site serve the O-type cell;