ocols used in the backhaul, and therefore would allow greater flexibility. The NCMS entity logically exists at both BS and MS sides of the radio interface. Any necessary inter-BS coordination is coordinated through the NCMS entity at the BS. An IEEE 802.16 entity is defined as a logical entity in an MS or BS that comprises physical and MAC layers on the data, control, and management planes. The IEEE 802.16f amendment (currently part of IEEE 802.16-2009 standard [3]) provided enhancements to IEEE 802.16-2004 standard, defining a management information base (MIB), for the physical and medium access control layers and the associated management procedures. The management information base originates from the Open Systems Interconnection Network Manage- ment Model and is a type of hierarchical database used to manage the devices in a communication network [5,6]. It comprises a collection of objects in a virtual database used to manage entities such as routers and switches in a network. "Asynchronous Transfer Mode (ATM) is a packet switching protocol that encodes data into small fixed-sized cells and provides data link layer services that run over OSI layer 1, differing from other technologies based on packet-switched networks such as IP or Ethernet, in which variable-sized packets are used. ATM exploits properties of both circuit-switched and small packet-switched networks, making it suitable for wide area data networking, as well as real-time media transport. ATM uses a connection-oriented model and establishes a virtual circuit between two end-points before the actual data exchange begins [4]. 3.1 The IEEE 802.16m reference model The IEEE 802.16 standard describes the use of a Simple Network Management Protocol (SNMP), ii i.e., an IETF protocol suite, as the network management reference model. The standard consists of a Network Management System (NMS), managed nodes, and a service flow database. The BS and MS managed nodes collect and store the managed objects in the form of WirelessMAN Interface MIB and Device MIB t