Experimental Demonstration of Real-Time PDCP-RLC V-RAN Split Transmission Over Fixed XGS-PON Access

Abstract

In this work, we experimentally assess the transmission of a PDCP-RLC virtualised RAN split interface through a commercial XGS-PON system. We investigate the impacts of DBA on the uplink and packet jitter on the downlink.

High-Speed Train Cell-less Network Enabled by XGS-PON and Impacts on vRAN Split Interface Transmission

“…inset Fig 1). This solution is based on virtualized central units (vCU) running on an Openstack cloud platform (for more details, please refer to [6]). This traffic is fed to an XGS-PON OLT connected to two ONUs through an optical coupler.…”

“…This solution would notably allow us to keep simple and robust to optical noise on-off keying (OOK) operation with low-cost commercially available off-the-shelf (COTS) small factor plug-and-play optical transceivers (SFP+) with a standardized and soon to be deployed optical access solution. First, we experimentally demonstrate the principle of the proposed solution Then, we evaluate the impacts of the transmission of a real-time high-layer split (HLS) virtual RAN (vRAN) interface [6]. Finally, we address the XGS-PON parameters that would allow transmission at different RF frequencies.…”

“…Fig. 2: Experimental Setup and the switching between two ONUs with an Ethernet interface emulating a RAN functional split interface [5].Then, we evaluate the impacts of the transmission of a real-time high-layer split (HLS) virtual RAN (vRAN) interface[6]. Finally, we address the XGS-PON parameters that would allow transmission at different RF frequencies.…”

“…For an RF link budget of 120dB 2 ΔLONU: distance between adjacent ONUs on a rail track 3 ΔLDIFF., MAX: maximum differential distance between ONUs 4 LMAX: Maximum distance between ONU and OLT 5 Minimum needed optical budget/class6 Uninterrupted communication time per PON (360 km/h)…”

Enabling technologies and innovations for 5G-oriented optical access networks

“…In [26], we experimentally evaluate a scenario where low-priority mobile services are offloaded to a 5Gcapable XGS-PON customer premises equipment (CPE). Virtual entities corresponding to different RAN and core network blocks are implemented on a generic server, on top of an Openstack virtualization environment.…”