OpenBNG: Central office network functions on programmable data plane hardware. - Ralf Kundel; Leonhard Nobach; Jeremias Blendin; Wilfried Maas; Andreas Zimber; Hans-Joerg Kolbe; Georg Schyguda; Vladimir Gurevich; Rhaban Hark; Boris Koldehofe; Ralf Steinmetz (Int. J. Netw. Manag., 2021)