Name
Title | ||
|---|---|---|
Latency performance analysis of low layers function split for URLLC applications in 5G networks. |
Abstract | ||
|---|---|---|
In 4G cloud radio access networks (C-RAN), latency at the mobile fronthaul was conceived mainly as a limiting factor of the fronthaul length. As long as fronthaul latency is not leading to violation of the hybrid automatic repeat request (HARQ) limit, the fronthaul latency would not have impact on the end-to-end latency. However, the advent of ultra-reliable low latency communications (URLLC) portends the need for effective latency reduction mechanisms, such as mini-slot and non-slot-based transmission, to enable URLLC data to be transmitted instantly. This implies that any delay at the fronthaul will impact the end-to-end round trip time (RTT) latency of URLLC applications and therefore should be carefully evaluated. On the other hand, consolidating more functions at the edge node, also known as remote unit (RU), has recently gained traction as a viable solution to reduce latency in 5G networks, with the sacrifice of increased complexity and capital/operational expenses (CAPEX/OPEX). In this paper, we provide experimental quantitative latency analysis of different low function split options at the fronthaul for URLLC applications using commercial off-the-shelf equipment (COTS). We also demonstrate that having the simplest remote unit design, which only contains an analog optical-to-electrical convertor, denoted by Option-9, can achieve the lowest fronthaul latency. Based on our findings, we design a flexible 5G architecture that can efficiently support different 5G applications. |
Year | DOI | Venue |
|---|---|---|
2019 | 10.1016/j.comnet.2019.106865 | Computer Networks |
Keywords | Field | DocType |
Flexible functional split,URLLC,C-RAN,Option-9,Mobile fronthaul,Fiber-wireless networking | Edge node,Remote unit,Hybrid automatic repeat request,Radio access,Latency (engineering),Computer science,Computer network,Round-trip delay time,Latency (engineering),Cloud computing | Journal |
Volume | ISSN | Citations |
162 | 1389-1286 | 1 |
PageRank | References | Authors |
0.34 | 0 | 8 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Yahya M Alfadhli | 1 | 1 | 1.02 |
| You-Wei Chen | 2 | 2 | 5.46 |
| Siming Liu | 3 | 2 | 3.07 |
| Shuyi Shen | 4 | 3 | 4.79 |
| Shuang Yao | 5 | 1 | 0.34 |
| Daniel Guidotti | 6 | 1 | 0.34 |
| Sufian Mousa Mitani | 7 | 1 | 1.02 |
| Gee-Kung Chang | 8 | 122 | 36.85 |