As previously written in indonesian-cellular-too-many-carriers?, Indonesia has 11 cellular operators, 5 with GSM based technology and 6 with CDMA based technology. Every operator needs telecommunication tower. If every operator builds tower for themselves, please imagine how big cities like Jakarta will look like. There will be tower jungles which is very inefficient both in investment and aesthetic.
To overcome this problem, the Indonesian Minister of Telecommunication and Information has proposed the regulation concerning the tower colocation. In this case, many operators can use the same tower for their own telecommunication purposes. The advantages of doing this are: the investment will be less but more efficient and at the same time reducing the number of towers which make the city more beautiful.
There are two different case to implement this regulation. For new towers, the ministry regulation has obliged the operators to apply the rules that the tower should be designed and used for multi-operators. This can lead to minimum investment and less number of tower needed. For current operated tower, the owner has to open the gate for other operators to share the use of their tower. Several additional works shall be done, mainly in tower strengthen.
Others may argue that every operator has its own radio network design which does not always fit with colocated tower. In this case, they have to adjust their design in order to comply with tower location. The regulator will provide many choices location, then the designer may choose the most suitable one for them. Please bear in mind that there are 11 operators and tower capability is just for around 2 or 3 operators only. So every sites need around 4 towers to serve all operators.
The colocated tower is not for telecommunication only. The same thing has been implemented in broadcasting, especially television broadcasting. They have got benefit in this case. So, we have to support this regulation.
In both cases, telecommunication and broadcasting, one thing should be considered, i.e. the interference. So, please make a good design so that no party is interfered by others in implementing colocated tower.