Roger Wattenhofer and Quentin Kniep propose a geographic leader scheduling system for Solana that groups block producers by physical proximity. Their simulation with three-window bins reduces mean handover delay between honest validators from 36.2 milliseconds to 17.0 milliseconds without altering each validator’s total window allocation. The protocol relies, however, on self-reported coordinates whose physical accuracy cannot be verified by the network. The model also identifies a security trade-off: under the assumption of an isolated attacker holding 5% of stake in Sydney, the simulation records up to six consecutive adversarial windows, whereas a random distribution would disperse control further. The authors argue that falsely reporting location typically slows down the reporting validator itself, but acknowledge that this economic incentive alone does not eliminate collusion risk.
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