It also includes the signaling bearer needed for the ALCAP. It contains access link control application part ( ALCAP) required to set up the transport bearers (data bearers) for the user plane. It does not include radio network layer information. The transport network control plane carries all control signaling within the transport layer. Each data stream is characterized by one or more frame protocols specified for that interface. The user plane includes data stream(s), and data bearer(s) for data stream(s). User information is carried by the user plane. In the three-plane structure the bearer parameters in the application protocol are not directly related to the user plane technology, but rather they are general bearer parameters. The application protocol is used for setting up bearers to the UE. It includes the application protocol (i.e., radio access network application part (RANAP) in I u, radio network subsystem application part (RNSAP) in I ur and node B application part (NBAP) in I ub). The control plane is used for all UMTS-specific control signaling. General protocol model for UTRAN interfaces. In UTRAN protocol structure is designed so that layers and planes are logically independent of each other and, if required, parts of protocol structure can be changed in the future without affecting other parts.įigure 15.23. RF processing 15.7.1 UTRAN Logical Interfaces įrequency and time (chip, bit, slot, frame) synchronization.Modulation and spreading/demodulation and despreading of physical channels Power weighting and combining of physical channels Multiplexing of transport channels and demultiplexing of coded composite transport channels įEC encoding/decoding and interleaving/deinterleaving of transport channels.Įrror detection on transport channels and indication to higher layers.Macro diversity combining/splitting of data streams from its cells (sectors)
![i u radio network i u radio network](https://www.hifiberry.com/wp-content/uploads/2017/07/F1N3RV9J48PXANZ.MEDIUM.jpg)
Radio environment survey (BER estimate, receiving signal strength, etc.) Termination of MAC, RLC, and RRC protocols for transport channels: BCH, PCH
#I U RADIO NETWORK MAC#
Termination of MAC protocol for transport channels RACH, FACH The following are the responsibilities of the Node B: