Frequency multiplexing of first and second OFDMA transmissions

A method performed by a first network node for frequency multiplexing a first Orthogonal Frequency Division Multiple Access (OFDMA) transmission and a second OFDMA transmission on a shared radio channel spanning at least partly a common bandwidth, wherein the first network node and a first wireless device are operating in a first wireless communications network, and a second network node and a second wireless device are operating in a second wireless communications network, and wherein the method comprises:

• determining an unallocated frequency band available beside a first frequency band intended/allocated for a first OFDMA transmission in the shared radio channel;
• sending, to the second network node, a sharing request comprising information about the unallocated frequency band in a second frequency band in the shared radio channel;
• conducting a contention procedure;
• sending, to the first wireless device, the first OFDMA transmission in the first frequency band, such that an end point of time of a first part of a High Efficiency (HE) preamble coincides with a start point of time of the first OFDMA transmission.

A method performed by a second network node for frequency multiplexing a first Orthogonal Frequency Division Multiple Access (OFDMA) transmission and a second OFDMA transmission on a shared radio channel spanning at least partly a common bandwidth, wherein a first network node and a first wireless device are operating in a first wireless communications network, and the second network node and a second wireless device are operating in a second wireless communications network, and wherein the method comprises:

• receiving, from the first network node, a sharing request comprising information about an unallocated frequency band available beside a first frequency band intended/allocated for a first OFDMA transmission in the shared radio channel;
• deciding to use the unallocated band in a second frequency band in the shared radio channel;
• conducting a contention procedure;
• and
• sending, to the second wireless device, a second part of a High Efficiency (HE) preamble and the second OFDMA transmission in the second frequency band.

A wireless communications system for frequency multiplexing a first Orthogonal Frequency Division Multiple Access (OFDMA) transmission and a second OFDMA transmission on a shared radio channel spanning at least partly a common bandwidth, wherein a first network node and a first wireless device are configured to operate in a first wireless communications network, and a second network node and a second wireless device are configured to operate in a second wireless communications network, and wherein the wireless communications system is configured to:

• determine an unallocated frequency band available beside a first frequency band intended/allocated for a first OFDMA transmission in the shared radio channel;
• send a sharing request comprising information about the unallocated frequency band;
• decide to use the unallocated band in a second frequency band in the shared radio channel;
• conduct a contention procedure;
• send a Legacy (L) preamble spanning the shared radio channel;
• send a first part of a High Efficiency (HE) preamble spanning the shared radio channel;
• send a first OFDMA transmission in the first frequency band, such that an end point of time of the first part of the HE preamble coincides with a start point of time of the first OFDMA transmission;
• and
• send a second part of the HE preamble and the second OFDMA transmission in the second frequency band.

A first network node for frequency multiplexing a first Orthogonal Frequency Division Multiple Access (OFDMA) transmission and a second OFDMA transmission on a shared radio channel spanning at least partly a common bandwidth, wherein the first network node and a first wireless device are configured to operate in a first wireless communications network, and a second network node and a second wireless device are configured to operate in a second wireless communications network, and wherein the first network node is configured to:

• determine an unallocated frequency band available beside a first frequency band intended/allocated for a first OFDMA transmission in the shared radio channel;
• send, to the second network node, a sharing request comprising information about the unallocated frequency band in a second frequency band in the shared radio channel;
• conduct a contention procedure;
• send, to the first wireless device, the first OFDMA transmission in the first frequency band, such that an end point of time of the first part of a High Efficiency (HE) preamble coincides with a start point of time of the first OFDMA transmission.

A second network node for frequency multiplexing a first Orthogonal Frequency Division Multiple Access (OFDMA) transmission and a second OFDMA transmission on a shared radio channel spanning at least partly a common bandwidth, wherein a first network node and a first wireless device are configured to operate in a first wireless communications network, and the second network node and a second wireless device are configured to operate in a second wireless communications network, and wherein the second network node is configured to:

• receive, from the first network node, a sharing request comprising information about an unallocated frequency band available beside a first frequency band intended/allocated for a first OFDMA transmission in the shared radio channel;
• decide to use the unallocated band in a second frequency band in the shared radio channel;
• conduct a contention procedure;
• and
• send, to the second wireless device, a second part of a High Efficiency (HE) preamble and the second OFDMA transmission in the second frequency band.

A non-transitory computer readable storage medium comprising instructions which, when executed on at least one processor, causes the at least one processor to carry out a method performed in a wireless communications system for frequency multiplexing a first Orthogonal Frequency Division Multiple Access (OFDMA) transmission and a second OFDMA transmission on a shared radio channel spanning at least partly a common bandwidth, wherein a first network node and a first wireless device are operating in a first wireless communications network, and a second network node and a second wireless device are operating in a second wireless communications network, and wherein the method comprises:

• determining an unallocated frequency band available beside a first frequency band intended/allocated for a first OFDMA transmission in the shared radio channel;
• sending a sharing request comprising information about the unallocated frequency band;
• deciding to use the unallocated band in a second frequency band in the shared radio channel;
• conducting a contention procedure;
• sending a Legacy (L) preamble spanning the shared radio channel;
• sending a first part of a High Efficiency (HE) preamble spanning the shared radio channel;
• sending a first OFDMA transmission in the first frequency band, such that an end point of time of the first part of the HE preamble coincides with a start point of time of the first OFDMA transmission;
• and
• sending a second part of the HE preamble and the second OFDMA transmission in the second frequency band.