FIELD: mobile communication systems. SUBSTANCE: data are assembled into blocks by first layer of convergence protocol prior to data transfer to second layer of convergence protocol. Data are presented to first layer of convergence protocol by one of plurality of convergence protocol layer users. Each user is assigned one access point identifier and one or more setup messages are exchanged between mentioned first and second layers; each message incorporates data packing/unpacking algorithm identifier, set of parameters for algorithm being identified, and bit card of mentioned access point identifiers. EFFECT: provision for protocol data and user data packing/unpacking. 8 cl, 3 dwg, 3 tbl
