 Release 9 specifications [14]. The UE monitors the Paging Channel (PCH) and/or System Information Block Type 1 contents to detect system information change. It further monitors control channels associated with the shared data channel to determine if data is scheduled for it, provides channel quality and feedback information, performs neighbor cell measurements and measurement reporting, and acquires system information. A signaling radio bearer (SRB) is defined as a radio bearer (RB) that is used only for the trans- mission of RRC and NAS messages. More specifically, the following three SRBs are defined: SRBO is for RRC messages using the Common Control Channel (CCCH) logical channel; SRB1 is for RRC messages including piggybacked Non-Access Stratum (NAS) messages, as well as for NAS messages prior to the establishment of SRB2, all using DCCH logical channel; SRB2 is for NAS messages using DCCH logical channel, has a lower priority than SRB1, and is always configured by E-UTRAN after security activation. In the downlink, the piggybacked NAS messages are used for bearer establishment/modification/ release. In the uplink, the piggybacked NAS messages are used for transferring the initial NAS messages during connection set-up. The NAS messages transferred via SRB2 are also contained in RRC messages, which do not include any RRC protocol control information. Once security is established, all RRC messages on SRB1 and SRB2, including those containing NAS or non-3GPP messages, are integrity-protected and ciphered by PDCP. The NAS independently applies integrity protection and ciphering to the NAS messages. The RRC protocol offers the following services to upper layers: Broadcast of common control information; Notification of mobile terminals in RRC_IDLE, e.g., about a terminating call; Transfer of dedicated control information, i.e., information for one specific UE. CHAPTER 6 The IEEE 802. 16m MAC CPS (Part I) The following are the main services that RRC expects from lower layers: Integrity protection and ciphering; Rel