Usage Message Attributes does not include the BR index, the request has failed. AAI_DSC-ACK This message is generated in Service Flow DSC-ACK Encrypted/ICV Unicast Dynamic Service response to an AAI_DSC- Establishment/ Change RSP message. An MS or BS Change/Deletion Acknowledge may generate the AAI_DSC- (Connection ACK message with Control Management) Message Type and Confirmation Code parameters. AAI_DSD-REQ This message is sent by an Service Flow DSD-REQ Encrypted/ICV Unicast Dynamic Service MS or BS to delete an existing Establishment/ Deletion Request service flow. An MS or BS Change/Deletion may generate this message (Connection with the following parameters: Management) Flow ID and Control Message Type. The SCID may be included in the AAI_DSD-REQ message to change the sleep cycle settings. AAI_DSD-RSP This message is generated in Service Flow DSD-RSP Encrypted/ICV Unicast Dynamic Service response to an AAI_DSD- Establishment/ Deletion Response REQ message. An MS or BS Change/Deletion may generate this message (Connection with the following parameters: Management) Flow ID; Control Message Type; and the Confirmation Code. In response to the AAI_DSD-REQ message containing an SCID, the SCID may be included in the response message as an indication of approval. If the response message does not include an SCID, the request has failed. AAI_DSX-RVD This message is generated by Service Flow DSx-RVD Encrypted/ICV Unicast DSX Received the BS to inform the MS that it Establishment/ has correctly received a DSX Change/Deletion (DSA or DSC) request (Connection message. The DSX-RSP Management) message is transmitted only after the DSX-REQ is authenticated. AAI_SLP-REQ An MS in the Active Mode Sleep Mode MOB_SLP- Encrypted/ICV Unicast Sleep Request may use this message to Operation enter the Sleep Mode. An MS in the Sleep Mode can change the Sleep Mode settings using this message. An MS in the Sleep Mode can exit from Sleep Mode using this message with a certain operation code. AAI_SLP-RSP This message is sent from the Slee