Patent ID: 8731591

Claim:
A method relating to a secondary use of at least one radio resource having a predefined primary use, the method comprising: sensing, using a radio receiver, the at least one radio resource to detect whether the at least one radio resource is currently being used for the predefined primary use; in response to detecting that the at least one radio resource is currently not being used for the predefined primary use, determining whether to engage in the secondary use of the at least one radio resource to transmit secondary use data; in response to a decision to engage in the secondary use of the at least one radio resource, transmitting by a radio transmitter, using the at least one radio resource, a radio signal including the secondary use data, wherein the transmitting includes providing the radio signal with a predefined identifier that identifies the radio signal as a secondary use of the at least one radio resource wherein the identifier comprises a signal sequence having a predetermined duration, the predetermined duration identifying the radio signal as a secondary use of the radio resources to a receiver receiving the radio signal.