Radio Resource Allocation for Indoor Secondary Access in TV White Space
2016 (English)In: International Journal On Advances in Telecommunications, ISSN 1942-2601, E-ISSN 1942-2601, Vol. 9, no 1&2, 25-34 p.Article in journal (Refereed) Published
This paper considers fair radio resource assignmentfor secondary users operating in TV white space by meansof frequency hopping. The achieved throughput for differentsecondary users is used to measure the degree of fairness. Thepermissible transmission power for secondary users is set toprotect the TV transmission from excessive interference. Hence,there are different limits on the secondary transmission powerwhen operating in different idle TV channels because differentadjacent channels generates different amounts of interferencebased on the TV receiver transfer function in the frequencydomain. Moreover, different free TV channels experience dif-ferent amounts of interference due to the non-linearities in theTV transmission. A model for power assignment in each ofthe free TV channels is developed based on the received TVsignal, TV receiver characteristics and secondary user location.For the sake of fair resource allocation, frequency hoppingis proposed herein, and its performance is evaluated. In thisstudy, three different TV transmitters located in three differentcities in Sweden, namely, G ̈avle, Stockholm and Link ̈oping, areexploited where the interference from the TV transmission intothe free channels is measured. For the secondary system, thedeployment of indoor WiFi access points in an office environmentis considered and simulated. The main finding is that frequencyhopping can provide fair radio resource distribution in terms ofthe obtainable throughput. Moreover, it is shown that the denserthe area is, the higher the achievable secondary throughputdueto the higher attenuation of the interfering signals.
Place, publisher, year, edition, pages
International Academy, Research and Industry Association (IARIA), 2016. Vol. 9, no 1&2, 25-34 p.
IdentifiersURN: urn:nbn:se:kth:diva-189764OAI: oai:DiVA.org:kth-189764DiVA: diva2:948815
QC 201607152016-07-132016-07-132016-07-15Bibliographically approved