HetNets Under Decoupled Uplink and Downlink Access with UE Random Discontinuous Transmission: Local Delay and Energy Efficiency  

作　　者：Zhang Yue Zheng Fuchun Luo Jingjing 

机构地区：[1]School of Electronic and Information Engineering,Harbin Institute of Technology(Shenzhen),Shenzhen 518055,China

出　　处：《China Communications》2024年第3期205-216,共12页中国通信（英文版）

基　　金：supported in part by the National Key R&D Program of China under Grant 2021YFB 2900304;the Shenzhen Science and Technology Program under Grants KQTD20190929172545139 and ZDSYS20210623091808025.

摘　　要：Due to the limited uplink capability in heterogeneousnetworks (HetNets), the decoupled uplinkand downlink access (DUDA) mode has recently beenproposed to improve the uplink performance. In thispaper, the random discontinuous transmission (DTX)at user equipment (UE) is adopted to reduce the interferencecorrelation across different time slots. By utilizingstochastic geometry, we analytically derive themean local delay and energy efficiency (EE) of an uplinkHetNet with UE random DTX scheme under theDUDA mode. These expressions are further approximatedas closed forms under reasonable assumptions.Our results reveal that under the DUDA mode, there isan optimal EE with respect to mute probability underthe finite local delay constraint. In addition, with thesame finite mean local delay as under the coupled uplinkand downlink access (CUDA) mode, the HetNetsunder the DUDA mode can achieve a higher EE witha lower mute probability.

关 键 词：decoupled uplink and downlink access(DUDA) heterogeneous networks(HetNets) random discontinuous transmission(DTX) stochastic geometry 

分 类 号：TN929.5[电子电信—通信与信息系统]