Patent ID: 8780835

Claim:
A method of controlling channel access, said method comprising: providing by an access node of a cellular communication system, to at least one device involved in a data transmission that is part of a device-to-device communication between terminals on an unlicensed band or that is an uplink communication between a terminal and an access node of a wireless local area network on an unlicensed band, a contention window assignment including at least an assignment of a size of a contention window for contention-based channel access, wherein the contention window assignment is based on a quality of service requirement of at least one logical channel to be accessed by the at least one device and data to be transmitted on the at least one logical channel; receiving at the access node, from the at least one device involved in the data transmission, a report of a conflict in contention-based channel access; adapting at the access node, as conflict resolving measures, the contention window assignment based on the reported conflict; and sending from the access node to the at least one device the adapted contention window assignment as conflict resolving measures instructions.