Passive infrastructure sharing involves multiple operators sharing the same passive infrastructure as a means to reduce the costs associated with real estate, access rights and preparing sites for the requirements of active infrastructure. As a general rule in the cellular industry, passive infrastructure sharing encompasses all the non-electronic elements required of a cell site. These can include: the tower itself, buildings or shelter, air conditioning plant, security, electricity generation capability for back-up, an electrical supply, technical premises and pylons.
The electronic elements required by a cell site such as base stations, microwave radio equipment, switches, antennae and transceivers don’t fall under the scope of passive infrastructure.
Active infrastructure compares the core clement of cellular telephony in the form of a network and contiguous radio cells providing coverage through operating on dedicated set of radio channels of defined frequency.
Element of the active infrastructure are the basic transceiver station (BST), the base station controller BSC a, the mobile switching center MSC and microwave and GSM antenna. The antenna enables both the transmission and to proceed receipt the radio signal, enabling the cellular telephony to proceed interrupted as the subscriber is mobile.
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