Patent ID: 7835318

Claim:
A radio telephony network supporting at least one link of a radio channel for a packet data transmission service, the network comprising: a plurality of network controllers, each network controller being connected via an interface to at least one base radio station, the at least one base radio station supervising at least one macrocell; and at least one base radio microstation connected to a network controller in the plurality of network controllers via an interface of the same type as that connecting the at least one base radio station to the network controllers, the at least one base radio microstation supervising at least one microcell incorporated in the at least one macrocell and centered at a point different from the point at which the at least one macrocell is centered, the at least one base radio microstation providing the packet data transmission service in the at least one microcell on the at least one link of the radio channel using a multi-carrier radio access, and the at least one base radio station providing the packet data transmission service in areas of the at least one macrocell other than in the at least one microcell, wherein at least one base radio station providing the packet data transmission service includes at least one protocol structure comprising a first set of protocol levels for transmitting packet data according to the base radio a first type of radio access used in the at least one macrocell and a second set of protocol levels for transmitting packet data according to the multi-carrier radio access used in the at least one microcell, the second set of protocol levels including a physical level and at least one protocol level located above the physical level for controlling the multi-carrier radio access, wherein the second set of protocol levels provides packet data transmission without modifying higher levels and protocols in the first set of protocol levels.