Co-Optimizing Performance and Fairness Using Weighted Pf Scheduling and Iab-Aware Flow Control.
IEEE Wireless Communications and Networking Conference(2020)
Abstract
In 5G networks, wide-band mmWave can be used to provide extreme data rates to user equipments (UEs). However, since mmWave is coverage limited, it necessitates dense placement of base stations, which in turn can significantly increase the fiber deployment cost. One solution being considered is to replace fibers with Integrated Access and Backhaul (IAB) network, where a part of the wireless spectrum is used for connecting base stations. In an asymmetric IAB network, standard proportional fair scheduling algorithm (PF) fails to distribute resources among UEs fairly. We propose a new weighted proportional fair (WPF) scheduling algorithm to improve the fairness of UE's achieved throughput in an IAB network. Also to mitigate congestion in IAB nodes and improve system throughput, we propose an IAB-aware end-to-end flow control (I-EEFC) algorithm. Through detailed analyses for both symmetric and asymmetric network topologies, we show that our proposed combined scheduling and flow control algorithm (WPF + I-EEFC) improves both fairness and system throughput.
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Key words
Integrated Access and Backhaul (IAB) network,weighted proportional fair scheduling,IAB-aware end-to-end flow control
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