Age of information (AoI) is an effective performance metric to measure data freshness in short packet communication. In this paper, we investigate AoI for decode-and-forward (DF) relay systems in the time division duplex (TDD) mode in short packet communication with a number of resources, such as blocklength, transmission power and channels. We formulate an average AoI minimization problem for DF relay systems in the TDD mode with multiple resources. We propose a joint multi-resource optimization (JMO) algorithm to minimize average AoI by simultaneously optimizing blocklength, transmission power and channels. Thus, the proposed JMO algorithm can significantly reduce average AoI, as compared to the previous work just considering blocklength optimization (BO). We prove that BO is independent of power allocation (PA) and channel allocation (CA), and can be decoupled to minimize AoI independently. Thus, the complex problem can be decomposed into a BO subproblem and a PA-and-CA subproblem. We propose a BO algorithm to successively optimize blocklengths in two hops using golden section method. We propose a joint power and channel allocation (JPCA) algorithm to further reduce AoI in an iterative manner. We propose a maximum multiplication (MM) based CA criterion, where CA is performed by maximizing the multiplication between two signal-to-noise ratios (SNRs) in two hops. Thus, the proposed MM-based CA criterion provides AoI performance better than the max-min based CA criterion only maximizing the smaller SNR in two hops.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Optimized Age of Information for Relay Systems with Resource Allocation


    Contributors:
    Zhang, Yichao (author) / Jiang, Yufei (author) / Zhu, Xu (author) / Cao, Jie (author) / Sun, Sumei (author)


    Publication date :

    2024-06-24


    Size :

    777624 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    Fairness-Aware Resource Allocation in Relay-Enhanced TD-LTE-A Systems

    Wu, Xuanli / Pei, Yujie / Labeau, Fabrice et al. | IEEE | 2016


    Resource Allocation for Relay-Assisted D2D Communications with Network Coding

    Huang, Wenhuan / Chen, Ming / Yang, Zhaohui et al. | IEEE | 2018



    Uplink Resource Allocation for Relay-Aided Device-to-Device Communication

    Sun, Jian / Zhang, Zhongshan / Xing, Chengwen et al. | IEEE | 2018


    Relay Selection and Resource Allocation for Energy Harvesting Cooperative Networks

    Deep, M. Prudhvi / Jain, Shubham / Ubaidulla, P. | IEEE | 2017