Queueing stability and CSI probing of a TDD wireless network with interference alignment

Matha Deghel (1, 2) , Mohamad Assaad (1) , Merouane Debbah (2, 3)

1 L2S - Laboratoire des signaux et systèmes
2 LANEAS - Large Networks and Systems Group
3 Mathematical and Algorithmic Sciences Lab [Paris]

This paper characterizes the performance of IA technique taking into account the dynamic traffic pattern and the probing/feedback cost. We consider a TDD system where transmitters acquire their CSI (Channel State Information) by decoding the pilot sequences sent by the receivers. Since global CSI knowledge is required for IA, the transmitters have also to exchange their estimated CSIs over a backhaul of limited capacity. Under this setting, we characterize in this paper the stability region of the system and provide a probing algorithm that achieves the max stability region. In addition, we compare the stability region of IA to the one achieved by a TDMA system where each transmitter applies a simple ZF (Zero Forcing technique).

Domaines: Mathématiques [math]; Sciences de l'ingénieur [physics]; Statistiques [stat]

Matha Deghel, Mohamad Assaad, Merouane Debbah. Queueing stability and CSI probing of a TDD wireless network with interference alignment. IEEE International Symposium on Information Theory - (ISIT 2015), Jun 2015, Hong kong, Hong Kong SAR China. ⟨10.1109/ISIT.2015.7282564⟩. ⟨hal-01242484⟩