Thursday, July 25, 2019

The IEEE 802.16m Protocol Structure


In this section, we further examine the functional elements of each protocol layer and their interactions. The 802.16m MAC common part sub-layer functions are classified into radio resource control and management functional group and medium access control functional group. The control-plane functions and data-plane functions are also separately classified. This would allow more organized, efficient, and structured method for specifying the MAC services in the IEEE 802.16m standard specification. The radio resource control and management functional group comprises several functional blocks including:  

• Radio resource management block adjusts radio network parameters related to the traffic load, and also includes the functions of load control (load balancing), admission control, and interference control; 

• Mobility management block scans neighbor BSs and decides whether MS should perform handover operation; 

• Network-entry management block controls initialization and access procedures and generates management messages during initialization and access procedures; 

• Location management block supports location based service (LBS), generates messages including the LBS information, and manages location update operation during idle mode; 

• Idle mode management block controls idle mode operation, and generates the paging advertisement message based on paging message from paging controller in the core network; 

• Security management block performs key management for secure communication. Using managed key, traffic encryption/decryption and authentication are performed; 

• System configuration management block manages system configuration parameters, and generates broadcast control messages such as superframe headers; 

• Multicast and broadcast service (MBS) block controls and generates management messages and data associated with MBS; 

• Service flow and connection management block allocates Station Identifier (STID) and Flow Identifiers (FIDs) during access/handover service flow creation procedures. 


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