xRAN Forum recently released it’s fronthaul specification
Virtualization of network infrastructure is part and parcel of the evolution for 5G. From the evolved packet core to the radio access network (RAN) operators and industry stakeholders are working to develop interoperability frameworks that will ensure the success of scaled network virtualization.
On the RAN side, in-building wireless system vendors in particular are pushing into the market with virtualized infrastructure solutions that replace expensive, proprietary signal source equipment like base transceiver stations with software running on commercial off-the-shelf servers. The goal here is to take cost and complexity out of in-building wireless to better address this underserved market, which is marked by a decrease in carrier spend being replaced by an increase in building owner and enterprise capex investment.
From a standardization standpoint, the xRAN Forum, which includes Verizon, AT&T, DT, Telstra, SK Telecom, Intel, Cisco and other members, formed to “develop, standardize and promote a software-based, extensive radio access network (xRAN) and to [standardize] critical elements of the xRAN architecture.
On April 12 xRAN Forum made available its Fronthaul Specification Version 1.0, which marks the group’s first public release since it formed in October 2016. The goal is to facilitate integration of baseband units and remote radio units with virtual network components and software management systems. Fronthaul refers to the connection between the baseband and remote radio unit. It’s largely associated with centralized RAN deployments wherein colocated signal source equipment is connected to RRUs to decrease capex and opex while providing coverage and capacity to a specified area. In addition to cutting costs, RAN centralization allows for dynamic allocation of network and spectrum resources to support shifting demand–think a CRAN serving an office high rise during work hours, then a nearby outdoor promenade in the afternoon and evening.
Verizon chairs xRAN Forum’s Fronthaul Working Group. VP of Network Technology Development and Planning Bill Stone called the public release “a groundbreaking advancement toward enabling an open RAN architecture to support next-generation products and services. xRAN compliant radios coupled with virtualized basebands provide much needed flexibility to support rapid development and deployment of RAN products. By adopting xRAN specification, we will be able to speed innovation, increase collaboration and be more agile to a quickly evolving market.”
