Abstract: The disclosure relates to a transmission node and a method for wirelessly providing a number of data packets to a plurality of receivers in a cell of a transmission node of a cellular telecommunications system. The method comprises the steps of storing a number of network coded data packets at the transmission node and cyclically transmitting the stored network coded data packets from the transmission node to the plurality of receivers. The number of transmitted network coded data packets in a cycle is at least equal to the number of data packets to be provided to each receiver of the plurality of receivers and each network coded data packet is a linear combination of two or more data packets to be provided to each receiver.

Abstract: The invention relates to a waveguide, comprising a grating in at least a part of the waveguide, which waveguide comprises a coating, the coating comprising a polymer, which polymer comprises an aliphatic chain, which aliphatic chain is provided with hydrophilic side-chains. The invention further relates to a sensor system comprising a waveguide according to any one of the preceding claims, a light source, and a photo-detector.