On Optimizing Signaling Efficiency of Retransmissions for Voice LTE

Chia An Hsu, Ching-Ju Lin, Yi Ren, Yu-Chee Tseng

研究成果: Conference contribution同行評審

1 引文 斯高帕斯(Scopus)

摘要

The emergence of voice over LTE enables voice traffic transmissions over 4G packet-switched networks. Since voice traffic is characterized by its small payload and frequent transmissions, the corresponding control channel overhead would be high. Semi-persistent scheduling (SPS) is hence proposed in LTE-A to reduce such overhead. However, as wireless channels typically fluctuate, tremendous retransmissions due to poor channel conditions, which are still scheduled dynamically, would lead to a large overhead. To reduce the control message overhead caused by SPS retransmissions, we propose a new SPS retransmission protocol. Different from traditional SPS, which removes the downlink control indicators (DCI) directly, we compress some key fields of all retransmissions' DCIs in the same subframe as a fixed-length hint. Thus, the base station does not need to send this information to different users individually but just announces the hint as a broadcast message. In this way, we reduce the signaling overhead and at the same time, preserve the flexibility of dynamic scheduling. Our simulation results show that, by enabling DCI compression, our design improves signaling efficiency by 2.16\times, and the spectral utilization can be increased by up to 60%.

原文English
主出版物標題2020 IEEE Wireless Communications and Networking Conference, WCNC 2020 - Proceedings
發行者Institute of Electrical and Electronics Engineers Inc.
ISBN(電子)9781728131061
DOIs
出版狀態Published - 5月 2020
事件2020 IEEE Wireless Communications and Networking Conference, WCNC 2020 - Seoul, Korea, Republic of
持續時間: 25 5月 202028 5月 2020

出版系列

名字IEEE Wireless Communications and Networking Conference, WCNC
2020-May
ISSN(列印)1525-3511

Conference

Conference2020 IEEE Wireless Communications and Networking Conference, WCNC 2020
國家/地區Korea, Republic of
城市Seoul
期間25/05/2028/05/20

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