User-centric JT-CoMP for High Altitude Platforms

This paper investigates how user-centric joint transmission coordinated multipoint (JT-CoMP) can be implemented for High Altitude Platform (HAP) systems to best enhance the user experience at the edge of coverage of HAP cells, along with the overall performance of the system. In CoMP, there is a known trade-off between carrier to interference plus noise ratio (CINR) gain and loss of capacity delivered to users. It is shown that implementation of an appropriate bandwidth allocation scheme for a CoMP region can enhance bandwidth efficiency and contribute to determining the optimal Power Level Difference (PLD). Using the right PLD value will minimise the trade-off between CINR levels and the capacity delivered to users. Typically, a PLD of 9 dB will maximise the overall mean capacity.