無指示訊號eMBB和URLLC多工系統之時空與頻空編碼

Space-time and Space-frequency Coding for Indicator-free eMBB and URLLC Multiplexed Systems

林子軒(Tzu-Hsuan Lin)

指導教授 ： 吳文榕

國立交通大學/電機學院/電信工程系所/碩士(2018年)

摘要

高可靠低延遲通訊(ultra-reliable low latency communications, URLLC)為第五代行動通訊中的新應用。在5G系統設計中有一項重要的議題為增強型行動寬頻(enhanced mobile broadband, eMBB)與URLLC之多工。這篇論文探討無指示訊號之多工，使用此做法時需執行盲目分類。為了要增強URLLC資料之可信度，我們提出使用時空區塊編碼(space-time block code ) 和時頻區塊編碼(space-frequency block code ) 之盲分類方法，主要是計算一簡單前置編碼之URLLC資料之相關性。為了再進一步提升效能表現，我們也提出使用疊代解碼之方法，其中我們將STBC視為內碼並將通道碼視為外碼。模擬顯示所提出之方法可以達到低分類錯誤率且同時擁有可靠之傳輸。

關鍵字

高可靠低延遲通訊 ； 時空編碼 ； 頻空編碼 ； 盲分類 ； 疊代解碼

並列摘要

Ultra-reliable low-latency communication (URLLC) is a new service in 5G mobile communications. One important issue in 5G system design is the multiplexing of enhanced-mobile-broadband (eMBB) and URLLC traffics. This thesis investigates the indicator-free multiplexing scenario in which blind classification is conducted at receiver. To enhance the reliability of URLLC data, we propose including space-time block code (STBC) or space-frequency block code (SFBC) in a blind classification scheme, conducted by calculating the correlation of URLLC data precoded by a simple method. To further improve that performance, we also propose using an iterative decoding scheme treating the STBC as an inner and the channel code as an outer code. Simulations show that the proposed methods can achieve low classification error rate and at the same time have reliable transmission.

並列關鍵字

URLLC ； Space-time Coding ； Space-frequency Coding ； Blind Classification ； Iterative Decoding

參考文獻

[1] P. Popovski, “Ultra-reliable communication in 5G wireless systems,” IEEE Int’l. Conf. 5G for Ubiquitous Connectivity (5GU), Nov 2014, pp. 146–151.

[2] Ericsson, “Discussion on URLLC puncturing of data,” 3rd Generation Partnership Project (3GPP), R1-1700688, Jun. 2017.

[3] Samsung, “Performance of eMBB receiver with blind detection for preempted eMBB resources,” 3rd Generation Partnership Project (3GPP), R1-1700968, Jun. 2017.

[4] Sharp, “A narrative on potential solutions for eMBB and URLLC multiplexing contextualized by 5G requirements,” 3rd Generation Partnership Project (3GPP), R1-1700737, Jun. 2017.

[5] H. Ji, S. Park, J. Yeo, Y. Kim, J. Lee, and B. Shim, “Ultra reliable and low latency communications in 5G downlink: Physical layer aspects,” arXiv preprint arXiv: 1704.05565, 2017.