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The deployment of 3.5G HSPA networks were critical for the adoption of mobile broadband but faced with the mobile broadband market success, operators must now consider the upgrade paths to support the continued growth with well performing network that provides sufficient capacity to offer subscriber a great mobile broadband user experience whatever the conditions. The necessary upgrades to 3.5G networks often require increasing the backhaul capacity between the Radio Network Controller and Cell sites, UTRAN software and hardware upgrades to support higher speed HSPA, deploying a second and third carrier, additional NCs, and additional Packet Data Core capacity. Eventually, costly cell splitting will be needed in markets where the available spectrum is exhausted.
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