Resource allocation for ultra-reliable low latency communications in sparse code multiple access networks

被引：0
作者：
Qinwei He
Yulin Hu
Anke Schmeink
机构：
[1] ISEK Research Group,
[2] RWTH Aachen University,undefined
[3] Informationstheorie und Systematischer Entwurf von Kommunikationssystemen,undefined
[4] RWTH Aachen University,undefined
来源：
EURASIP Journal on Wireless Communications and Networking | / 2018卷
关键词：
Finite blocklength; Resource allocation; SCMA; URLLC;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In this paper, we propose an optimal resource allocation policy for sparse code multiple access (SCMA) networks supporting ultra-reliable low-latency communications (URLLC). The network is assumed to operate with finite blocklength (FBL) codes, which is opposed to the classical information-theoretic works with infinite blocklength (IBL) codes. In particular, we aim at maximizing the average transmission rate in the FBL regime while guaranteeing the transmission reliability. A joint design is proposed, which combines the power allocation with the codebook assignment. The convexity of the corresponding optimization problem is analyzed and an iterative search algorithm is further provided. We study the impact of reliability and short blocklength constraints on the performance of the proposed optimal resource allocation policy through numerical simulations. In addition, we evaluate the FBL performance of the proposed joint design in comparison to the scenario with an IBL assumption.
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