Wireless communication systems with code-division multiple access and interference avoidance

A wireless communication system comprising:

• a plurality of radio nodes, each radio node of the plurality of radio nodes is configured to
• transmit wireless signals to the plurality of radio nodes of a first wireless network, and
• receive wireless signals from the plurality of radio nodes of the first wireless network, the first wireless network sharing a common wideband wireless channel with at least one of a plurality of other wireless networks,
• wherein at least one radio node of the plurality of radio nodes of the first wireless network includes
• a spectrum sensing processor that is configured to determine spectrum occupancy information about the common wideband wireless channel from the wireless signals that are received by the at least one radio node,
• a Spectrum Usability Mask processor that is configured to generate a first Spectrum Usability Mask based on the spectrum occupancy information, the first Spectrum Usability Mask indicating usable spectral segments in the common wideband wireless channel with respect to a location of the at least one radio node,
• a broadcast and control channel processor that is configured to transmit the first Spectrum Usability Mask to a plurality of other radio nodes in the first wireless network, and
• a traffic data channel processor and the broadcast and control channel processor are configured to transmit traffic and control information to a plurality of destination radio nodes in the first wireless network.

A radio node comprising:

• a server including circuitry and memory, the server is configured to
• determine spectrum occupancy information about a common wideband wireless channel from wireless signals that are received by the radio node,
• generate a first Spectrum Usability Mask based on the spectrum occupancy information, the first Spectrum Usability Mask indicating usable spectral segments in the common wideband wireless channel with respect to a location of the radio node,
• transmit the first Spectrum Usability Mask to a plurality of other radio nodes in a first wireless network, and
• transmit traffic and control information to a plurality of destination radio nodes in the first wireless network.

A wireless communication method comprising:

• determining, with a server, spectrum occupancy information about a common wideband wireless channel from wireless signals that are received by a radio node of a first wireless network;
• generating, with the server, a first Spectrum Usability Mask based on the spectrum occupancy information, the first Spectrum Usability Mask indicating usable spectral segments in the common wideband wireless channel with respect to a location of the radio node;
• transmitting, with the server, the first Spectrum Usability Mask to a plurality of other radio nodes in the first wireless network;
• receiving, with the server, a second Spectrum Usability Mask of a second destination radio node in the first wireless network;
• and
• transmitting, with the server, traffic and control information to a plurality of destination radio nodes in the first wireless network using transmit signals based on the second Spectrum Usability Mask.

A non-transitory computer-readable medium comprising instructions that, when executed by a server, cause the server to perform a set of operations, the set of operations comprising:

• determining spectrum occupancy information about a common wideband wireless channel from wireless signals that are received by a radio node of a first wireless network;
• generating a first Spectrum Usability Mask based on the spectrum occupancy information, the first Spectrum Usability Mask indicating usable spectral segments in the common wideband wireless channel with respect to a location of the radio node;
• transmitting the first Spectrum Usability Mask to a plurality of other radio nodes in the first wireless network;
• receiving a second Spectrum Usability Mask of a second destination node in the first wireless network;
• and
• transmitting traffic and control information to a plurality of destination radio nodes in the first wireless network based on spectral segments that are marked as usable in the second Spectrum Usability Mask.