pe of PKM enclosed: CMAC. packet); PKM Identifier to match a BS response to the MS requests or an MS response to the BS requests. For re-transmissions, the identifier field remains unchanged. AAI_REG-REQ This message is sent by the Network Entry/ REG-REQ Encrypted/ICV Unicast Registration MS in order to register with Re-entry Request the BS and to indicate supported management parameters, CS capabilities, IP mode, etc. It is used by the MS to negotiate general MS capabilities and perform registration during network entry. This message is encrypted and does not contain CMAC Tuple, if authentication has been completed. This message, among other parameters, includes MS MAC address to derive security keys. AAI_REG-RSP A message that is transmitted Network Entry/ REG-RSP Encrypted/ICV Unicast Registration by the BS in response to an Re-entry Response AAI_REG-REQ message during initialization to confirm registration and authentication. The AAI_REG-RSP message is encrypted and does not contain CMAC Tuple, if authentication has been completed. This message, among other parameters, includes the STID which is used for MS identification in lieu of the temporary STID which has been transferred by AAI-RNG-RSP message. AAI_RES-CMD The AAI_RES-CMD message Network Entry/ RES-CMD Encrypted/ICV Unicast Reset Command is transmitted by the BS to Re-entry force the MS to reset itself, reinitialize its MAC, and repeat initial network entry. This message may be used if an MS is unresponsive to the BS, (Continued) Table 6-8 IEEE 802. 16m MAC Management/Control Messages [1,2] Continued 802.16- IEEE 802.16m Standard MAC Management Equivalent Security Connection Message Message Description Usage Message Attributes or if the BS detects continued abnormalities in the UL transmission from the MS. It contains no information except the MAC message name. AAI_DSA-REQ This message is sent by an Service Flow DSA-REQ Encrypted/ICV Unicast Dynamic Service MS or BS to create a new Establishment/ Addition Request service flow, and may contain Change/De