A method of wireless communication, comprising: communicating, by a first wireless communication device with a second wireless communication device in a spectrum accessed by a plurality of network operating entities, a first reservation signal (1008, 1009) indicating a reservation for a first transmission slot, wherein the first wireless communication device and the second wireless communication device are associated with a first network operating entity of a plurality of network operating entities, and wherein the first reservation signal includes a duration based on a power class associated with the first network operating entity; and communicating, by the first wireless communication device with the second wireless communication device, a first communication signal in the first transmission slot; characterised by: receiving, by the first wireless communication device from a third wireless communication device (205a, 215a) associated with a second network operating entity of the plurality of network operating entities, a second reservation signal (308, 309) indicating a reservation for a second transmission slot in the spectrum, wherein the first network operating entity is associated with a lower power class than the second network operating entity, and wherein the first reservation signal (1008, 1009) includes a longer duration than the second reservation signal (308, 309). communicating, by a first wireless communication device with a second wireless communication device in a spectrum accessed by a plurality of network operating entities, a first reservation signal (1008, 1009) indicating a reservation for a first transmission slot, wherein the first wireless communication device and the second wireless communication device are associated with a first network operating entity of a plurality of network operating entities, and wherein the first reservation signal includes a duration based on a power class associated with the first network operating entity; and communicating, by the first wireless communication device with the second wireless communication device, a first communication signal in the first transmission slot; characterised by: receiving, by the first wireless communication device from a third wireless communication device (205a, 215a) associated with a second network operating entity of the plurality of network operating entities, a second reservation signal (308, 309) indicating a reservation for a second transmission slot in the spectrum, wherein the first network operating entity is associated with a lower power class than the second network operating entity, and wherein the first reservation signal (1008, 1009) includes a longer duration than the second reservation signal (308, 309). receiving, by the first wireless communication device from a third wireless communication device (205a, 215a) associated with a second network operating entity of the plurality of network operating entities, a second reservation signal (308, 309) indicating a reservation for a second transmission slot in the spectrum, wherein the first network operating entity is associated with a lower power class than the second network operating entity, and wherein the first reservation signal (1008, 1009) includes a longer duration than the second reservation signal (308, 309).