Dynamic Bandwidth Allocation algorithms for NG-PON2 to support 5G Fronthaul services

SDR Enabled C-RAN Implementation using OpenAirInterface

“…However, the native transport of digital RoF signals in conventional PON systems, such as EPON and xGPON, presents several issues, in terms of data capacity, latency and jitter, usually not compatible with the fronthaul requirements [52,53]. To overcome these issues, the optical communication group at the Instituto de Telecomunicações, Aveiro has investigated and tested different solutions including mobile fronthaul RoF Transceivers for point-to-point wavelength overlay channel (PtP WDM PON) [53][54][55][56] and Dynamic Bandwidth Allocation (DBA) algorithms for next-generation PONs to support 5G Fronthaul services [57,58]. The Mobile Laboratory Setup based on OAI implemented in infrastructure ORCIP (Optical Radio Convergence Infrastructure for Communications and Power Delivering) [59] is an important tool to study and experimentally validate different X-haul options.…”

Self-Adjusting DBA Algorithm for Next Generation PONs (NG-PONs) to Support 5G Fronthaul and Data Services

“…To achieve such aim, we have previously proposed in [29] and [30] a DBA algorithm for NG-PON2 that supports both 5G fronthaul and best-effort data services on a single PON channel. The DBA algorithm proposed on those works is different from the classical DBA in terms of the number and the structure of the allocated time slots at each upstream frame and it was shown that it minimizes the US 5G fronthaul delays and also maximizes the data services throughput among all active ONUs connected to PON channel.…”

“…In such case, a tight management coordination between the 5G infrastructure and the NG-PON infrastructure is required so that the throughput value of each new 5G fronthaul must be first set in the new DBA settings and the throughput of each torn down 5G fronthaul connection must be freed (or, otherwise, it will remain reserved preventing the network to use it for data services). Similarly to [29] and [30], the DBA proposed here assumes that a single allocation interval is assigned to both services and each ONU uses its allocation interval to transmit the packets of both services giving higher priority to 5G fronthaul packets.…”