Busy tone implementation for coexistence of IEEE 802.22 and 802.11af systems

Bu bildiride, IEEE 802.22 ve IEEE 802.lIaf sistemlerinin TV beyaz boşlugunda birlikte varolabilmeleri için meşgul ton tabanlı yeni bir algoritma önerilmiştir. Önceki meşgul ton tabanlı çalışmalardan farklı olarak 802.11af erişim noktasmm meşgul tonu dinlemesinin yanı Sıra, erişim noktasınan bağlı kullanıcılar da meşgul ton sinyali dinlemekte ve bu sinyali duyduklarmda erişim noktasına iletmektedirler. Böylelikle 802.22 sistemlerine yapılan girişim azaltılmaktadır. Bu çalışmada standartlara uygun iletişim parametreleri ve kanal modelleri dikkate almaları ve önerilen sistemin iyileştirme performansı girişim yapan paket oranı cinsinden değişik duyma bölgeleri için elde edilmiştir.In this paper, a new algorithm based on busy tone approach has been proposed for the coexistence of IEEE 802.22 and IEEE 802.11af systems in TV white space. Different from the earlier study, in addition to 802.11af access points listening to the busy tone signal, their clients also listen to the busy tone and let the access points know once they hear it. Accordingly, interference caused to 802.22 systems has been reduced. This study quantifies the improved system performance in terms of interfering packet rate for different hearing regions considering the communication parameters and channel models adapted for the standards. © 2015 IEEE

Busy tone based coexistence algorithm for WRAN and WLAN systems in TV white space

WOS: 000441140700015TV White Space (TVWS) refers to frequency band reserved only for licensed terrestrial TV broadcasting and is opened to unlicensed use under regulatory conditions. While regulations protect licensed systems from interference, interference among unlicensed systems is left mainly to manufacturers. Consequently, there is a need to develop new coexistence approaches between TVWS networks. Busy tone broadcasting is a coexistence method, which can be used by TVWS networks to announce the selected frequency band is occupied. In this paper, a busy tone based coexistence algorithm is proposed for IEEE 802.11af and IEEE 802.22 networks and analyzed by considering different client distributions experiencing log-normal shadowing, where the exact interfering packet rate and successful packet transmission rate expressions are obtained and validated by simulations for different scenarios. The results show that with the proposed coexistence approach, a WLAN can reliably detect the busy tone signal to change its frequency band and can reduce interference to WRAN. Even if there is no available frequency band for the WLAN, the WRAN still maintains its enhanced successful packet transmission performance. The deployment of the proposed algorithm is important for successful coexistence between cognitive wireless networks, where interference is not regulated, such as in TVWS bands.Turk Telekom; Argela under the TT Collaborative Research Awards programme; TUBITAK programme [2232]This research was supported by Turk Telekom and Argela under the TT Collaborative Research Awards programme. The work of Tuncer Baykas is supported by TUBITAK 2232 programme

Analysis of extended busy tone performance for coexistence between WRAN and WLAN TVWS networks

TV White Spaces indicate spectrum bands, which were reserved for licensed terrestrial TV broadcasting and opened to unlicensed use under regulatory conditions. One important regulation which is common in all regulatory domains is no harmful interference is created to licensed devices. On the other hand, interference between unlicensed devices is not regulated. As a result system designers developed new methods to improve coexistence between TVWS networks. Extended busy tone, one of such methods, is designed for coexistence between wireless regional area and wireless local area networks based on IEEE 802.22 and 802.11af standards, respectively. In this paper we analyse the performance of extended busy tone at different range conditions and verify via simulations under realistic conditions. Our results indicate that the method can reduce interference considerably at intermediate distances and enable networks to operate without a significant reduction in throughput. © 2015 IEEE

Busy tone based power control for coordination of IEEE 802.11af and 802.22 system

Bu bildiride, IEEE 802.22 ve IEEE 802.11af kablosuz sistemlerinin TV beyaz boşluğunda uyumlu çalışabilmeleri için meşgul ton tabanlı yeni bir güç kontrol algoritması önerilmiştir. Daha önceki meşgul ton tabanlı çalışmalardan farklı olarak, 802.11af erişim noktası ve erişim noktasına bağlı kullanıcılar meşgul ton sinyalini algıladıktan sonra haberleşme güçlerini konum bilgilerine göre ayarlamakta ve gerekiyorsa iki hop üzerinden haberleşmektedirler. Böylelikle 802.22 sistemlerine yapılan girişim azaltılırken, 802.11af sistemlerinin haberleşmesi de mümkün kılınmaktadır. Bu çalışmada standartlara uygun haberleşme parametreleri ve kanal modelleri dikkate alınarak, 802.11af ve 802.22 sistemlerinin performansları paket girişim oranı ve başarılı paket oranı türlerinden farklı senaryolar altında incelenmiştir.In this paper, a new power control algorithm based on busy tone approach has been proposed for the coordination of IEEE 802.22 and IEEE 802.11af systems in TV white space. Different from the earlier studies, in addition to both 802.11af access point and clients listening to the busy tone, they also adjust their communication power according to the location information and use hopping for communication, if needed. Acccordingly, interference caused to 802.22 systems has been reduced while the 802.11af systems are still able to communicate. This study quantifies the 802.11af and 802.22 system performances in terms of interfering packet rate and succesful packet transmission rate for different scenarios considering the communication parameters and channel models adapted for the standards