Frequency Hopping for Capacity Improvement

Jun 29th, 2015
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Frequency Hopping is Motorola’s solution to cope with Capacity and Quality problems arising in highly loaded GSM networks. The present document introduces this technique, describing its basic principles and the advantages that can be achieved by implementing it.

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Advanced Network Development CentreFrequency Hopping for Capacity and Quality ImprovementReview 0.4November 1997EXECUTIVE SUMMARYFrequency Hopping is Motorola's solution to cope with Capacity and Quality problems arising in highly loaded GSM networks. The present document introduces this technique, describing its basic principles and the advantages that can be achieved by implementing it.There are two different ways to implement Frequency Hopping, known as Base Band Frequency Hopping (BBH) and Synthesiser Frequency Hopping (SFH), both available in all Motorola equipment without any hardware modification at all.The results obtained in different systems where this feature has been implemented show that very good quality and system performance are achieved at the same time that the capacity of the system is dramatically increased. Capacity enhancements of 60% have been achieved with BBH in systems where it is already implemented, and up to 80% with SFH. Theoretical studies claim for higher possibilities for SFH respect to BBH, and capacity increases of 100% can be possible, always considering a conventional fixed plan as the reference.The reduction in costs involved in Frequency Hopping implementation is the third basic point supporting Frequency Hopping as the best option for system operators. The reduction in number of sites and the simplicity of frequency planning and optimisation activities are the key to achieve up to 50% reduction in the investment

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