Abstract: A wireless communication method includes sending, by a first device in a wireless network, a poll packet (32, 38, 44) for polling a second device in the wireless network. The poll packet includes an address of the second device. The second device receives and at least partially decodes the poll packet. The second device sends a response packet (36, 40, 46) in response to the poll packet. The sending of at least part of the response packet is substantially simultaneous with the receiving of at least part of the poll packet by the second device. Wireless communication systems, transmitters and receivers using the method are also described.

Abstract: A method and system for communication in a wireless network A method of communication in an optical wireless network, the optical wireless network comprising a first device, a plurality of further devices, and a common communication channel usable by any one of the further devices for sending data to the first device, wherein the method comprises sending, by at least one of the further devices, at least one control signal to the first device via at least one control channel; and allocating, by the first device, the common communication channel to one or more of the further devices, wherein the allocating is in response to the at least one control signal; wherein the sending of the control signal or at least one of the control signals by the further device or at least one of the further devices is substantially simultaneous with the sending of data via the common communication channel.

Abstract: An optical wireless communication (OWC) enabled luminaire system comprises at least one radiation source; a driver apparatus configured to drive the at least one radiation source to produce modulated radiation comprising or representing an OWC signal; a plurality of outputs configured to output modulated light that comprises or is generated using the modulated radiation produced by the at least one radiation source, wherein the plurality of outputs are positioned at substantially different locations that are remote from the at least one radiation source; and at least one guide configured to guide the modulated radiation from the at least one radiation source to the plurality of outputs.

Abstract: A mobile device comprises a plurality of transmitters and receivers, each configured for optical wireless communication, wherein the plurality of transmitters and/or receivers are arranged on at least three surfaces of the mobile device such that each of the three surfaces has a respective at least one of the transmitters and/or each of the three surfaces has a respective at least one of the receivers.