ons are given in [19], "Data flows through Layer 2". 3.8.6 Uu Stratum Services and Functions in Layer 3 Here we provide an overview on Layer 3 services and functions based on the Uu Stra- tum. Further detailed description of the RRC protocol and structured procedures involv- ing RRC can be found in [20-22]. The main Uu stratum services include: general control, notification and dedicated con- trol. The first provides a common information broadcast service to all Ues in a certain geographical area. The second provides paging and notification broadcast services to a specific UE(s) in a certain geographical area. The third provides services for establish- ment/release of a connection and transfer of messages using this connection. It should also be possible to transfer a message during the establishment phase. 3.8.7 The Radio Resource Control (RRC) Functions The RRC layer handles the control plane signalling of Layer 3 between the UEs and UTRAN. It main functions include: Broadcast of information provided by the access and non-access stratum (core network). It performs information broadcasting from the network to all UEs. The system information is normally repeated on a regular basis. Establishment, re-establishment, maintenance and release of an RRC connection between the UE and UTRAN. Higher layers request the UE side to establish the first signalling connection for the UE. The establishment of an RRC connection in- cludes an optional cell re-selection, an admission control, and a Layer 2 signalling link establishment. Establishment, reconfiguration and release of radio bearers. Can, on request from higher layers, perform the establishment, reconfiguration and release of radio bear- ers in the user plane. Assignment, reconfiguration and release of radio resources for the RRC connec- tion. It handles the assignment of radio resources (e.g. codes, CPCH channels) needed for the RRC connection including needs from both the control and user plane. RRC connection mobility functions. Performs evaluation, decision and exe