FIELD: information technologies.
SUBSTANCE: in joint planning and coding procedure a composite data package is formed as a suspended linear combination of regular data packages. According weight ratios of coding are adapted on the basis of feedback information from the receiving devices on the accepted data packages so that a composite package represents a new linearly independent coding of regular data packages, different from any data package transferred in a group transfer mode, which has been earlier received by means of each receiving device in a selected set of the receiving devices during a session of group transfer. Besides, using a vector of weight ratios, at least with two different non-zero weight ratios of coding adds an additional extent of freedom and guarantees the possibility to always form a composite data package, which represents a new linearly independent coding for transfer.
EFFECT: strategy efficient in throughput capacity for a secure group transfer, especially when number of users is high.
29 cl, 7 dwg, 3 tbl
