This blog is by Vishal Agnihotri from Nokia Solutions and Networks.
An advanced software feature from NSN has enabled a major European operator to deploy 3G in its existing 900 MHz frequency band used for GSM services, while at the same time safeguarding – and even improving – the quality of its GSM services. The software helped improve the GSM call drop rate and boost quality in the downlink and uplink by 30% and 50% respectively, delivering better voice calls for end users.
This project, for one of the first operators in the world to commercially deploy UMTS900 back in 2009, was part of a continuing effort to provide best-in-class mobile broadband coverage across major urban centers.
This latest achievement was realized by deploying DFCA (Dynamic Frequency and Channel Allocation) software feature, part of the NSN Liquid Radio GSM Software Suite.
Used with NSN base stations, including the Flexi Multiradio BTS, the software makes highly efficient use of the spectrum allocated to GSM services, while also improving network quality. This frees up valuable spectrum, allowing operators either to increase GSM capacity or to allocate more spectrum and enable higher data rates for 3G and 4G mobile broadband . DFCA doubles base station site traffic capacity by using a powerful Base Station Controller (BSC) algorithm to optimize the radio channel allocation for voice and data. It enables frequency re-use to be increased, which effectively promotes refarming by allowing GSM implementation with less spectrum. As well as up to doubling voice and data capacity, DFCA helps operators carry the same traffic over fewer frequencies and gives them more bandwidth for 3G HSPA/LTE.
There’s room for 3G and even better GSM quality – all with a software upgrade.