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In this paper we investigate the feasibility of using microwave frequencies for fixed non-line-of-sight wireless backhauling connecting small-cell radio base stations with an aggregation node in an outdoor urban environment, i.e. a typical heterogeneous network scenario. We study system level simulations for a point-to-point system where the wave propagation is based on diffraction over rooftops. We further investigate the effects of carrier frequency, interference, antenna height, rain, and tolerance to antenna alignment errors. It is found that the higher frequencies offer not only larger bandwidths but also higher antenna gains which would ideally work to their advantage. However, these advantages may be lost when taking antenna alignment errors and rain into account. Different frequencies simply have their different trade-offs.

The evolution to denser radio-access networks with small cells in cluttered urban environments has introduced new challenges for microwave backhaul. A direct line of sight does not always exist between nodes, and this creates a need for near- and non-line-of-sight (NLOS) microwave backhaul.

• Expanded capability gives operators greater flexibility to deploy MINI-LINK products as backhaul solutions for small cells, thereby enabling high network performance
• MINI-LINK performance proven for non-line-of-sight usage
• New additions to MINI-LINK portfolio include several IP-based backhaul products catering for mobile-broadband growth

Jonas Hansryd from Ericsson Research discusses how microwave backhaul can handle the demands for increased capacity.

Ericsson is increasing its focus on the channel-partner business. Cooperation with successful channel partners will be essential for the vision of 50 billion connected devices by 2020.

Visitors to Volvo Ocean Race stopovers are enjoying high-speed mobile internet thanks to a next-generation IP network solution from Ericsson.

At the Carrier Ethernet World Congress 2011 on October 11 to 13 in Amsterdam, the Netherlands, Ericsson will showcase its IP and Broadband offering, including results from newly conducted interoperability tests.

Microwave technology is a cost-efficient technology for flexible and rapid backhaul deployment to almost any location. It is the dominant backhaul media for mobile networks in the world today, and is expected to maintain this position during the evolution of mobile broadband.