Practical analysis of IEEE 802.11n coexistence with UMTS network in 2.4 GHz ISM band for indoor applications By the end of second decade of XXI century different wireless technologies typically coexist in the same geometrical space and share the same unlicensed frequency bands. Although the interference of WiFi and 3G networks is quite well known by the present time, the wireless engineers still lack good estimation methods of such an impact. Here we give a view on the mask of the UMTS 2100 signal, provide practical measurements, propose a model of its attenuation in order to provide the average signal strength level value. Finally this article provides numerical estimation for signal to noise degradation in order to evaluate the interference effect.

Analytical Evaluation and Potentials of Frame Based Equipment for LTELAAWiFi Coexistence Telecommunication agencies are facing the problem of spectrum scarcity with respect to the dramatic increase of demand of new spectrum to support 5G network services. The inefficient usage of the limited spectrum necessitates the coexistence of different radio access technologies in the same spectrum. Sharing the spectrum without negative impact is a prerequisite for telecommunication agencies before allowing new radio access technology to coexist with incumbent technology already using the spectrum. In this work, we develop general analytical models to evaluate the potentials of the Frame Based Equipment (FBE) MAC protocol that can be used by LTELAA networks to share the spectrum with WiFi. We derive the expressions of the performance of both networks and we validate them by NS3 simulations. We show that FBE can be a good tradeoff that offers an acceptable LTELAA performance while reducing the negative impact on WiFi if both network parameters are well tuned. In particular, increasing the WiFi data rate, increases the performance of LTELAA and the overall performance.