may utilize the hf band to send the payload data in step 202 the ap 10 may locate the position of the destination mu 20 using one of several real time location systems u201c rtlss u201d with which the ap 10 may be equipped for example the ap 10 may have a received signal strength indicator u201c rssi u201d or use a time distance of arrival u201c tdoa u201d system these or similar systems use conventional technologies to determine a location e g the distance and angle of the destination mu 20 relative to the ap 10 in step 204 the ap 10 may use the location information obtained in step 202 to send the payload data the payload data is sent to the mu 20 over the hf band the ap 10 may utilize the sa 12 to transmit the payload data via the uni directional transmission since the payload data is addressed to the mu 12 and it is sent over the hf band the destination mu 20 is the only mu in the wireless network 1 which receives this uni directional transmission the other mus 21 22 may be u201c unaware u201d that the payload data is being sent to mu 20 on the hf band since the non destination mus 21 22 may not be using the hf band there is no risk that there will be a collision on this.