The RRC can be collocated with RRA in the BS. The RRC functional entity may communicate with other RRCs in neighboring BSs which may be in the same or different ASN. The RRC may also reside in the ASN-GW and communicate to other RRAs across R6 reference point. When the RRC is located in the ASN, each RRA is associated with exactly one RRC. The RRC relay functional entity may reside in ASN-GW for the purpose of relaying RRM messages. The RRC relay cannot terminate RRM messages, but only relays them to the final destination RRC. Standard RRM procedures are required between RRA and RRC, and between RRCs across network interfaces to ensure interoperability. These procedures are classified into two types: information reporting procedures for delivery of BS radio resource indicators from RRA to RRC; and between RRCs and decision support procedures from RRC to RRA for communicating recommendations on aggregated RRM status (e.g., in neighboring BSs) for various purposes. The RRM primitives can be used either to report radio resource indicators (i.e., from RRA to RRC or between RRCs) or to communicate decisions from RRC to RRA. The former type of primitive is called information reporting primitive and the latter is called decision support primitive. The available radio resource information provided by the RRAs to RRC is used by RRC for load balancing. The RRC may interact with the handover controller to ensure load balance. 2.6 MOBILITY MANAGEMENT The WiMAX network architecture supports two types of mobility: ASN-anchored mobility (intra- ASN) and CSN-anchored mobility. ASN-anchored mobility refers to a scenario where a mobile terminal moves between two base stations belonging to the same ASN while maintaining the same foreign agent at the ASN. The handover in this case utilizes R6 and R8 reference points. The CSN- anchored mobility refers to an inter-ASN mobility scenario where the mobile station moves to a new anchor foreign agent and the new FA and CSN exchange signaling messages to establish data for- warding paths. T