CPC H04W 16/14 (2013.01) [H04L 5/0007 (2013.01); H04W 72/0453 (2013.01); H04W 74/0891 (2013.01)] | 41 Claims |
1. 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.
|