By now, most observers are familiar with the notion that 5G networks will often use small cells, in part because 5G networks will be using millimeter wave spectrum that has propagation limitations compared to traditional mobile spectrum in the sub-2GHz regions.
That has implications for backhaul markets and requirements. Today’s 4G macro cell typically has a 1 Gbps physical connection, of which 200 to 300 Mbps is being used at any given time.
A 20-Mhz 5G MIMO antenna array would need 64 Gbps per sector, and three sectors per cell site would generate nearly 200 Gbps of traffic, Ciena argues. In other words, 5G small cells might require two orders of magnitude (100 times) more capacity.
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