Extended Version of the Work on Opportunistic Feedback for Multichannel Wireless Networks

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

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

This work studies the problems of feedback allocation and scheduling for a multichannel downlink cellular network under limited and delayed feedback. We consider a realistic scenario where a fixed and small numberF of link states can be reported to the base-station (BS) per time-slot. We study the trade-off between knowing at the BS a small number of accurate link states (i.e. that can be reported within one time-slot) and a larger but outdated number of link states (i.e. number of link states >F that requires more than one slot to be reported). We propose an efficient algorithm that selects the link states that should be reported to the base-station. A novelty here is that this feedback allocation algorithm is performed at the users side. We show that this algorithm combined with the Max-Weight scheduling achieves at least a fraction η of the stability region achieved under the ideal system (i.e. with full and perfect feedback at no cost). We then provide numerical results that show the best aforementioned trade-off under various system setups.

Domains: Engineering Sciences [physics]

Matha Deghel, Mohamad Assaad, Merouane Debbah. Extended Version of the Work on Opportunistic Feedback for Multichannel Wireless Networks. IEEE GLOBECOM 2016, Dec 2016, Washington, United States. ⟨10.1109/ICC.2016.7511353⟩. ⟨hal-02878533⟩