US 12,238,567 B2
Enabling 2G and 3G cellular radio communications over a packet-based open radio access network fronthaul interface
Atanu Guchhait, Solna (SE); Charles Santhosam Lourdu Raja, Bangalore (IN); Wessam Afifi Ahmed, Plano, TX (US); and John Melvin John William, Mysore (IN)
Assigned to MAVENIR SYSTEMS, INC., Richardson, TX (US)
Filed by Mavenir Systems, Inc., Richardson, TX (US)
Filed on Nov. 21, 2023, as Appl. No. 18/515,525.
Application 18/515,525 is a continuation of application No. 17/730,291, filed on Apr. 27, 2022, granted, now 11,864,018.
Claims priority of application No. 202121019773 (IN), filed on Apr. 29, 2021.
Prior Publication US 2024/0098551 A1, Mar. 21, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 69/00 (2022.01); H04L 69/18 (2022.01); H04W 28/02 (2009.01); H04W 48/02 (2009.01); H04W 52/52 (2009.01); H04W 56/00 (2009.01); H04W 84/02 (2009.01); H04W 88/10 (2009.01); H04W 88/12 (2009.01); H04W 92/02 (2009.01); H04W 92/12 (2009.01)
CPC H04W 28/0247 (2013.01) [H04L 69/18 (2013.01); H04L 69/26 (2013.01); H04W 48/02 (2013.01); H04W 52/52 (2013.01); H04W 56/001 (2013.01); H04W 84/02 (2013.01); H04W 88/10 (2013.01); H04W 88/12 (2013.01); H04W 92/02 (2013.01); H04W 92/12 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An Open Radio Access Network, O-RAN, comprising:
a fronthaul, FH, interface over which an O-RAN Distributed Unit, O-DU, and an O-RAN Radio Unit, O-RU, communicate with one another and exchange O-RAN standard defined user-plane, U-plane, packets and control-plane, C-Plane, packets,
wherein said fronthaul interface carries control and management information via management-pane (M-Plane) message exchange, and timing synchronization is achieved in accordance with synchronization-plane (S-Plane) procedures, and
wherein said O-RAN accommodates communications via 2G and 3G based mobile networks, wherein each of said O-DU for a 2G and said O-DU for a 3G based mobile network based mobile network comprises modules for functions:
(a) TCH (Traffic Channel)/CCH (Control Channel) for generation/reception;
(b) interleaving/de-interleaving;
(c) modulation/demodulation functions;
(d) additional DFE (digital front end) functions; and
(e) FH interface functions and real time control.
 
13. An Open Radio Access Network, O-RAN, comprising:
a fronthaul, FH, interface over which an O-RAN Distributed Unit, O-DU, and an O-RAN Radio Unit, O-RU, communicate with one another and exchange O-RAN standard defined user-plane, U-plane, packets and control-plane, C-Plane, packets,
wherein said fronthaul interface carries control and management information via management-pane (M-Plane) message exchange, and timing synchronization is achieved in accordance with synchronization-plane (S-Plane) procedures, and
wherein said O-RAN accommodates communications via 2G and 3G based mobile networks,
and wherein said O-DU for a 3G based mobile network comprises modules for functions:
(a) TCH/CCH generation/reception;
(b) Forward Error Correction (FEC) encoding/decoding;
(c) interleaving/de-interleaving, spreading/de-spreading, scrambling de-scrambling;
(d) modulation and filtering/filtering-demodulation functions;
(e) IQ processing to convert to frequency domain and target sample rate and additional DFE functions; and
(f) FH interface functions and real time control.