t for UL and DL unicast messages and traffic. There are two methods for the MS to monitor DL control information and broadcast messages. In the first method, the MS monitors only the Anchor BS for DL control information and broadcast messages. In this case, the DL/UL control channels of the Anchor BS may contain burst allocation information for the other active base stations. In the second method, the MS monitors all the base stations in the Diversity Set for DL control information and broadcast messages. In this method, the DL/UL control channels of any active BS may contain burst allocation information for the other active base stations. The method to be used by the MS is defined during the REG-REQ and REG-RSP messaging. An MDHO process begins with a decision for an MS to transmit/receive unicast messages and traffic from multiple base stations at the same time interval. For DL MDHO, two or more base stations provide synchronized transmission of MS DL data SO that macro diversity combining can be performed by the MS. For UL MDHO, the transmission from an MS is received by multiple BSs SO that selection diversity on the information received by multiple base stations can be performed. The BS supporting MDHO broadcasts the system information that includes the H_Add and H_Delete thresholds. These thresholds are used by the MDHO capable MS to determine if MOB_MSHO-REQ should be sent. When long-term CINR of an active BS in the current Diversity Set is lower than the H_Delete threshold, the MS sends a MOB_MSHO-REQ message to drop this active BS from the Diversity Set. When long-term CINR of a neighbor BS is greater than the H_Add threshold, the MS sends a MOB_MSHO-REQ to add this neighbor BS to the Diversity Set. The decision to update the diversity set begins with a notification by the MS through the MOB_MSHO-REQ message or by the BS through the MOB_BSHO-REQ management message. CHAPTER 6 The IEEE 802. 16m MAC CPS (Part I) The Anchor BS update may begin with a MOB_MSHO-REQ message from MS or a MOB_BSHO- REQ message fr