Telefonaktiebolaget LM Ericsson (publ)
Device-to-device discovery communication

Abstract:

According to some embodiments, a method in a wireless device of reducing collisions between device-to-device (D2D) communication resources and D2D discovery resources comprises obtaining a first plurality of transmission resources available for transmitting D2D discovery messages, and obtaining a second plurality of transmission resources comprising a subset of the first plurality. The subset comprises transmission resources potentially unavailable for transmitting D2D discovery messages. The method includes associating a first weighted value with each transmission resource of the first plurality not included in the second plurality, and associating a second weighted value with each transmission resource of the second plurality. The method includes selecting a transmission resource from the first plurality of transmission resources using the first and second weighted values, and determining whether the selected transmission resource is available to transmit a discovery message. The method includes transmitting the discovery message using the selected transmission resource.