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Paper detail

Scheduling for Downlink OFDMA With IRS Reconfiguration Constraints

The technical limitations of the intelligent reflecting surface (IRS) (re)configurations in terms of both communication overhead and energy efficiency must be considered when IRSs are used in cellular networks. In this paper, we investigate the downlink time-frequency scheduling of an IRS-assisted multi-user system in the orthogonal frequency-division multiple access (OFDMA) framework wherein both the set of possible IRS configurations and the number of IRS reconfigurations within a time frame are limited. We formulate the sum rate maximization problem as a non-polynomial (NP)-complete generalized multi-knapsack problem. A heuristic greedy algorithm for the joint IRS configuration and time-frequency scheduling is also proposed. Numerical simulations prove the effectiveness of our greedy solution.

preprint2024arXivOpen access
Alberto RechLeonardo BadiaStefano Tomasin
Networking and Internet Architecturemath.ITInformation Theoryeess.SP
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Alberto RechLeonardo BadiaStefano Tomasin

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