What bandwidth should operators allocate for a typical urban small cell? Too little, and they may throttle the capabilities that 3G and LTE can provide both now and in the future. Too much, and it could impact the cost significantly.
Several small cell backhaul vendors have told me in the past that 100 Mbps is perfectly adequate for individual urban small cells, even including the latest multi-mode 3G/4G/Wi-Fi products. While macrocell backhaul links are increasing to 1Gbps or more, this has been seen as overkill for individual on-street units. But is this the right choice when equipment lifetimes are budgeted for 5 years or more? A few backhaul vendors are offering higher speed products that may satisfy both bandwidth and budget.