The transition of television channels from analog to digital has freed up a considerable amount of unused portions of spectrum called TV white spaces. Providing unlicensed access over TV bands will offer a wide range of possibilities for future open and flexible spectrum policies and provide additional bandwidth for mobile and wireless broadband services. For instance, the IEEE 802.22 is a concrete example of recent standards opting for TVWS to deploy WRAN infrastructures in rural and remote areas. The WIFI technology IEEE 802.11af has also been introduced as a possible candidate for operating as a secondary system over TV bands. Recently in February 2014, this standard was approved.
What are the future trends of research and investment in IEEE 802.11af? What are the commercial and technical constraints?
Hi,
Thank you for the proposed paper which is a very interesting one. The paper tackles the technical differences between the two standards. However, It is also interesting to talk about the commercial and economic constraints. I'm wondering why industry investments and deployments in the field of CR standards evolves very slowly. I think that CR standards could have a great potential to be more attractive to most operators and communication service providers if the business use cases offered are more adapted to their needs. For example, operators are interested in indoor scenarios and smaller cells like micro, pico and femto cells. On the other hand, license holders fear of interference and service disruption due to the use of access technologies based on opportunistic spectrum sharing which raises some technical challenges like the sensing reliability and the hidden node problem. Is there any other reasons that would explain why such standards deployment is delayed?
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