Age of Information: Can CR-NOMA Help?

被引：8

作者：

Ding, Zhiguo ^{[1
,2
]}

Schober, Robert ^{[3
]}

Poor, H. Vincent ^{[4
]}

机构：

[1] Khalifa Univ, Dept Elect Engn & Comp Sci, Abu Dhabi, U Arab Emirates

[2] Univ Manchester, Dept Elect & Elect Engn, Manchester M13 9PL, England

[3] Friedrich Alexander Univ Erlangen Nurnberg FAU, Inst Digital Commun, D-91058 Erlangen, Germany

[4] Princeton Univ, Dept Elect & Comp Engn, Princeton, NJ 08544 USA

来源：

IEEE TRANSACTIONS ON COMMUNICATIONS | 2023年 / 71卷 / 11期

基金：

英国工程与自然科学研究理事会; 欧盟地平线“2020”; 美国国家科学基金会;

关键词：

NOMA; Time division multiple access; Base stations; Wireless networks; Protocols; Data models; Signal to noise ratio; Non-orthogonal multiple access (NOMA); age of information (AoI); cognitive-radio NOMA; AVERAGE AGE; SYSTEMS; NETWORKS; ACCESS;

D O I：

10.1109/TCOMM.2023.3306573

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The aim of this paper is to exploit cognitive-radio inspired NOMA (CR-NOMA) transmission to reduce the age of information in wireless networks. In particular, two CR-NOMA transmission protocols are developed by utilizing the key features of different data generation models and applying CR-NOMA as an add-on to a legacy orthogonal multiple access (OMA) based network. The fact that the implementation of CR-NOMA causes little disruption to the legacy OMA network means that the proposed CR-NOMA protocols can be practically implemented in various communication systems which are based on OMA. Closed-form expressions for the AoI achieved by the proposed NOMA protocols are developed to facilitate performance evaluation, and asymptotic studies are carried out to identify two benefits of using NOMA to reduce the AoI in wireless networks. One is that the use of NOMA provides users more opportunities to transmit, which means that the users can update their base station more frequently. The other is that the use of NOMA can reduce access delay, i.e., the users are scheduled to transmit earlier than in the OMA case, which is useful to improve the freshness of the data available in the wireless network.

引用

页码：6451 / 6467

页数：17

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