802.11ax系统中基于OFDMA调度接入的公平性资源分配算法

doi:10.12305/j.issn.1001-506X.2021.11.36

Abstract

Abstract:

A fairness sub-channel and power allocation algorithm based on energy efficiency is proposed for the uplink of orthogonal frequency division multiple access (OFDMA) system in 802.11ax. According to the uplink model based on energy efficiency, the resource unit (RU) number determination algorithm and separate sub-channel matching and power allocation algorithm are proposed. To solve the problems of insufficient spectrum utilization and unreasonable power allocation in separate allocation algorithm, an improved joint sub-channel and power iterative allocation algorithm is proposed, by using generalized fractional programming, the constraints are rewritten and the penalty term is added to the objective function to relax the integer variables, it is further solved by sequential convex programming (SCP). The simulation results show that the energy efficiency of users in the system is improved compared with the original algorithm through independent and joint iterative allocation of power and sub-channels, and the fairness between users is considered.

Key words: IEEE802.11ax, orthogonal frequency division multiple access (OFDMA) scheduling access, resource allocation, energy efficiency, generalized fractional programming

CLC Number:

TN929.53

Fatang CHEN, Zhihao ZHANG, Hebin LI, Zhiqiang MEI. Fairness resource allocation algorithm based on OFDMA scheduling access in 802.11ax system[J]. Systems Engineering and Electronics, 2021, 43(11): 3352-3359.

Figures/Tables 7

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References 25

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Fairness resource allocation algorithm based on OFDMA scheduling access in 802.11ax system

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