ABSTRACT: Cooperative communications has recently granted a great attention. High Altitude Platform
assisted cooperative spectrum sensing (HAP-ACSS) is adopted as a step towards achieving this goal. This
research employ High altitude platform HAP with smart database fusion center FC to control spectrum
assignment to secondary users SU according to available spectrum and the received signal to noise ratio SNR
from surrounded secondary user equipment SUE. Base station is equipped with Received Signal Strength
Indicator (RSSI) and channel allocation mechanism to handle its assigned channels between licensed primary
users PU and SUs within the cell. With the aid of collected BSs-RSSI measurements, SU and PU registered
information and the other collected information from all BSs in HAP coverage range, the FC can collect the
sparse SUE transmitted power and translate it into a spatial spectrum distribution. The proposed network
configuration with adopted algorithm is explained, and a simulation of SU localization is provided. The adopted
scheme is promising to help the mobile network achieving significantly improved performance with the
coexistence of SUs acquiring to share PU spectrum.
Keywords: Mobile communication networks, Cognitive networks, HAP communication