Effective Capacity Analysis of NOMA Networks with Short Packets

Xiurong Zhang,Shaoli Kang,Xinwei Yue

doi:10.3390/app112311438

Abstract

Low latency and a massive connection have become the requirements of energy internet wireless communication. Effective capacity analysis of non-orthogonal multiple access (NOMA) networks with short packets is of vital importance in energy internet communication planning and design. Low-latency communications are one of the main application scenarios in next-generation wireless networks. This paper focuses on the effective capacity of NOMA networks, where the finite blocklength, delay exponent, and transmission error probability are taken into account. New exact and asymptotic expressions of effective capacities are derived for arbitrarily ordered users with a finite blocklength. Based on the analytical results, the high Signal-to-Noise Ratio slopes of effective capacity in NOMA networks are carefully attained. The numerical results validate that (a) non-orthogonal users are capable of obtaining a larger effective capacity when the blocklength decreases, and that (b), as the value of the error probability and delay exponent increases, the effective capacity of non-orthogonal users worsens.

Highlights

Energy internet information collection and data transmission depends on the planning and construction of a wireless communication network with a high data transmission rate and a low delay
The simulation results are presented to display the impacts of the delay exponent and the transmission error probability on non-orthogonal multiple access (NOMA) networks with short packet communications
It can be observed that the effective capacity of NOMA networks is a throughput ceiling, and this is a result of the impacts of transmission error probability

Summary

Introduction

Energy internet information collection and data transmission depends on the planning and construction of a wireless communication network with a high data transmission rate and a low delay. Effective capacity analysis of NOMA networks with short packets is of vital importance in energy internet communication planning and design. A short packet with finite blocklength codes is an efficient approach to achieve low-latency communications, where the effective capacity can be employed to characterize the performance of wireless networks under the condition of certain delay constraints [11]. Through the optimization of the transmission rate and power allocation, the authors of [14] aimed to maximize the effective throughput of users with a high channel gain and ensure that other users meet the lowest effective throughput for short-packet communications.

Network Model

Performance Evaluation

Numerical Results

Conclusions