Coordinated frequency sharing between satellite and terrestrial radio access networks
Embodiments of the present disclosure are directed to systems and methods for avoiding or mitigating co-channel interference between terrestrial and satellite radio access networks (RANs). The systems and methods comprise one or more terrestrial base stations and one or more satellite base stations, each configured to transmit signals across overlapping frequency bands. The system further comprises applying an orthogonal spread spectrum code to the signals transmitted by the satellite base station, while the terrestrial base station transmits without such coding.
1 . A system for mitigating co-channel interference of a satellite link, the system comprising:
a first base station of a radio access network (RAN) configured to wirelessly communicate a first set of signals using a first frequency band; and
one or more computer processing components configured to perform operations comprising:
based on a determination that the first base station is a terrestrial base station, instructing the first base station to communicate the first set of signals using the first frequency band without applying a code to the first set of signals;
based on a determination that a second base station is a non-terrestrial base station, instructing the second base station to apply the code to a second set of signals to generate a third set of signals, wherein at least a portion of the second set of signals and the first set of signals overlap in frequency;
based on a determination that the first base station and the second base station provide overlapping coverage, instructing the second base station to apply the code to the second set of signals to generate the third set of signals;
based on a determination that co-channel interference is occurring between the first base station and the second base station, instructing the second base station to apply the code to the second set of signals to generate the third set of signals; and
following the application of the code to the second set of signals, instructing the second base station to communicate the second of set of signals.
2 . The system of claim 1 , wherein the code is a first code of a plurality of codes.
3 . The system of claim 1 , further comprising instructing the second base station to communicate to a UE, an identification of the code.
4 . The system of claim 1 , wherein the code is a spreading code.
5 . The system of claim 4 , wherein the code is an orthogonal spreading code.
6 . The system of claim 5 , wherein the code is selected from one of a Walsh code, a Hadamard code, an Orthogonal Variable Spreading Factor (OVSF) code, or a gold code.