IN just the past year, preliminary interest and discussions
about a possible 5G standard have evolved into a fullfledged
conversation that has captured the attention and imagination
of researchers and engineers around the world. As the
long-term evolution (LTE) system embodying 4G has now
been deployed and is reaching maturity, where only incremental
improvements and small amounts of new spectrum can
be expected, it is natural for researchers to ponder “what’s
next?” [1]. However, this is not a mere intellectual exercise.
Thanks largely to the annual visual network index (VNI) reports released by Cisco, we have quantitative evidence that the wireless
data explosion is real and will continue. Driven largely
by smartphones, tablets, and video streaming, the most recent
(Feb. 2014) VNI report [2] and forecast makes plain that
an incremental approach will not come close to meeting the
demands that networks will face by 2020.
IN just the past year, preliminary interest and discussionsabout a possible 5G standard have evolved into a fullfledgedconversation that has captured the attention and imaginationof researchers and engineers around the world. As thelong-term evolution (LTE) system embodying 4G has nowbeen deployed and is reaching maturity, where only incrementalimprovements and small amounts of new spectrum canbe expected, it is natural for researchers to ponder “what’snext?” [1]. However, this is not a mere intellectual exercise.Thanks largely to the annual visual network index (VNI) reports released by Cisco, we have quantitative evidence that the wirelessdata explosion is real and will continue. Driven largelyby smartphones, tablets, and video streaming, the most recent(Feb. 2014) VNI report [2] and forecast makes plain thatan incremental approach will not come close to meeting thedemands that networks will face by 2020.
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