Originally GSM referred to the European working party set up to establish a new standard
(‘Groupe Speciale Mobile’) but was later amended to reflect a more global application (Global
System for Mobile communications).
available frequencies (spectrum)
• The cellular structure allows the re-use of
frequencies across the network
• Planning the pattern of this frequency re-use is a
key part of the system design
• Hexagonal pattern best represents interlocking grid of cells
(‘Groupe Speciale Mobile’) but was later amended to reflect a more global application (Global
System for Mobile communications).
Cellular Structure
• The aim of a cellular system is to make best use of theavailable frequencies (spectrum)
• The cellular structure allows the re-use of
frequencies across the network
• Planning the pattern of this frequency re-use is a
key part of the system design
• Hexagonal pattern best represents interlocking grid of cells
GSM Planning
• Key Network planning parameters
• Coverage – getting a usable radio signal to all areas in the
network
• Capacity – handling the call traffic generated by the subscribers
• Quality – low interference, few calls dropped etc.
network
• Capacity – handling the call traffic generated by the subscribers
• Quality – low interference, few calls dropped etc.
• Optional parameters requiring planning
• Hierarchical Cell Structures (macrocell/microcell)
• Frequency Hopping
• Discontinuous Transmission
• Power Control
• Frequency Hopping
• Discontinuous Transmission
• Power Control
• Subscriber/traffic analysis
• Capacity limited by number of TRX’s