o resource and radio access management and control, such as [5]: Network Layer CS SAP Radio Resource Service Specific Control and Convergence Management Sublayer MAC SAP MAC Sublayer Security Sublayer PHY|SAP Physical Layer Control Plane Data Plane FIGURE 6-1 IEEE 802.16m control-plane MAC CPS functions [5] Mobile WiMAX. DOI: 10.1016/B978-0-12-374964-2.10006-2 Copyright © 2011 Elsevier Inc. All rights reserved CHAPTER 6 The IEEE 802.16m MAC CPS (Part I) Radio Resource Management (RRM); Mobility Management; Network-entry Management; Location Management; Idle Mode Management; Security Management; System Configuration Management; Enhanced-Multicast and Broadcast Service (E-MBS); Service Flow and Connection Management; Relay Functions; Self Organization; Multi-Carrier Operation. The control-plane part of the MAC sub-layer includes functional blocks which are related to the physical layer and link control such as: Physical Layer Control; Control Signaling; Sleep Mode Management; Scheduling and Resource Multiplexing; Multi-Radio Coexistence; Data Forwarding; Interference Management; Inter-BS Coordination. The data-plane portion of the MAC sub-layer is responsible for the following functions: MAC SDU Fragmentation/Packing; MAC PDU Formation. To draw an analogy between IEEE 802.16m and 3GPP LTE Layer 2 protocols, one must note that the Layer 2 functions of the latter include MAC and RLC sub-layers and the RRC sub-layer is considered as Layer 3. The IEEE 802.16m RRCM functional group corresponds to RRC sub-layer in 3GPP LTE, and IEEE 802.16m MAC sub-layer is analogous to a combination of 3GPP LTE MAC and RLC sub-layers. The 3GPP RRC sub-layer will be described to enable the reader to understand the similarities and differences of the two standards by making heuristic correspondences between the two protocol sets. The IEEE 802.16m MAC layer is connection-oriented. For the purpose of mapping services to varying levels of QoS at mobile stations, all data communications are manifested in the form of transport connections. Ser