Latency-aware Time-frequency MAC Design for 5G URLLC

• Main Authors: Qin, Wei-Bo, 秦偉博
• Other Authors: Wang, Li-Chun
• Format: Others
• Language: en_US
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/66xwyd

碩士 === 國立交通大學 === 電機工程學系 === 106 === Ultra reliable and low latency communications (URLLC) is an important key usage scenario in the next fifth generation (5G) communication systems. To support URLLC applications, such as automated driving and remote control, a round trip latency (from user equipment to base station) is targeted to be less than 1 millisecond (ms). Such stringent latency requirement of URLLC poses new challenges on the design of uplink (UL) and downlink (DL) transmissions. In 3GPP, it has been proposed that the resource allocation and the frame structure of 5G should be designed in a flexible basis to reduce the latency of UL/DL transmissions. In this thesis, we consider a co-existing scenario to serve the URLLC UL traffic when the base station is in DL mode. We propose a latency-aware time-frequency scheduling scheme to fast allocate physical resources to URLLC UL traffic so as to reduce the waiting time of DL-to-UL switching. Our simulation results show that a base station with our proposed scheme can schedule over 142,000 requests/second and serve 54 burst requests within 0.5 ms.