US 9,813,786 B2
Topology-reconfigurable optical mobile fronthaul architecture with software-defined connectivity and hierarchical QoS
Neda Cvijetic, Plainsboro, NJ (US); Akihiro Tanaka, Plainsboro, NY (US); and Ting Wang, West Windsor, NJ (US)
Assigned to NEC Corporation, Tokyo (JP)
Filed by NEC Laboratories America, Inc., Princeton, NJ (US)
Filed on Jan. 28, 2015, as Appl. No. 14/607,075.
Claims priority of provisional application 61/932,424, filed on Jan. 28, 2014.
Prior Publication US 2015/0215044 A1, Jul. 30, 2015
Int. Cl. H04Q 11/00 (2006.01); H04J 14/02 (2006.01); H04L 12/931 (2013.01); H04L 12/24 (2006.01); H04L 12/26 (2006.01)
CPC H04Q 11/0005 (2013.01) [H04J 14/0256 (2013.01); H04J 14/0284 (2013.01); H04L 41/12 (2013.01); H04L 49/00 (2013.01); H04Q 11/0062 (2013.01); H04Q 11/0067 (2013.01); H04L 43/0811 (2013.01)] 18 Claims
OG exemplary drawing
1. A method comprising:
providing run-time optical mobile fronthaul (MFH) topology re-configurability through software-defined control of both optical circuit switches and electrical packet switches handling traffic patterns and latency optical by-pass based device-to-device connectivity, the providing comprising:
employing either an optical switch for wavelength-tunable transceivers or an optical switch for fixed-wavelength optical transceivers;
providing, with the wavelength-tunable optical transceivers, optical bypass functionality and optical-layer connectivity enabled by optical elements without wavelength tunability or software defined network SDN based control for optical multiplexer and demultiplexer components, or providing optical bypass functionality and optical-layer connectivity using the fixed wavelength optical transceivers without wavelength tunability or SDN-based control, through centralized wavelength tuning functionality of SDN-controlled wavelength-tunable optical demultiplexer elements; and
enabling, with optical circulators a bi-directional any-downlink/any-uplink optical transceiver connectivity and optical bypass functionality using single-fiber optical access between the circulators and mobile-side transceivers.