Is the Backhaul Really the Bottleneck for LTE?

Is Backhaul the LTE Bottleneck?The popularity of smartphones and tablets, motivated by the launch of the iPhone (2007) and the iPad (2010) have created a dramatic increase in mobile data consumption. The need to provide higher throughputs at the base station level to serve this demand has concerned operators, equipment vendors and industry watchers about a possible bottleneck in the backhaul network.

The basis for this concern is that microwave technology will not be able to provide enough capacity, and that only fiber is able to meet the capacity needs of 4G/LTE networks. This apprehension is being capitalized on by some optical network providers who argue that fiber connections are needed to provide gigabit levels at each base station. Although a gigabit connection in each base station is desirable, extremely high costs, slow deployment and inflexibility of fiber optic networks prevent this from being a viable option for operators who are CAPEX and OPEX constrained.

Aviat Networks’ studies, based upon our early involvement in some of the largest LTE network deployments, show that an average of 100 to 200 Mbps of backhaul capacity per LTE cell site is more than adequate and easily achievable with current microwave technologies. Read the white paper below or see our case study on a national U.S. LTE operator.

[scribd id=97725327 key=key-38mk9f6v4rhp0hbtrj4 mode=list]

  • Salanave: The LTE deployment equation (fiercewireless.com)
  • AT&T’s LTE network now in 32 cities (macworld.com)
  • Construction, Not Capacity, is the Real LTE Challenge in U.S. (aviatnetworks.com)
  • The Modulation Arms Race: A Case of Diminishing Returns (aviatnetworks.com)
  • Report: Sprint’s LTE network is as fast as its competitors (fiercewireless.com)

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