tennas and dedicated pilots in STC DL zone IE. (Continued) Table 9-12 Contents of a DCD MAC Management Message [1] Continued Information Field in DCD Message Usage Description CDD SISO/SIMO Descriptor When CDD is Used This parameter may be transmitted to specify CDD parameters to the MS. It applies to the first PUSC zone as well as zones with 1 logical antenna and dedicated pilots in STC DL zone IE. Connection Identifier Descriptor Always For values see reference [1] MAC Version Always This parameter specifies the version of IEEE 802.16 to which the message originator conforms. If the MAC version values exchanged between a BS and MS during network entry differ such that the BS/MS version is greater than the MS/BS version, the MS may attempt to perform normal operations. The BS may attempt to communicate with the MS per the version specified by the MS, or may decline to interoperate with the MS. Default HO RSSI and CINR Averaging Always For values see reference [1]. Parameter Emergency Service Always The Emergency Service is a compound TLV that defines the parameters required for Emergency Service. DL Coordinated Zone Indication Always For values see reference [1]. Cell Type Always Cell type parameter may be used by the MS in the network for cell selection and reselection. NSP Change Count When BS transmits NSP List The value of NSP Change Count is programmable. NSP Change Parameter Count is an incrementing value. A change in NSP Change Count signals to an MS that NSP List and/or Verbose NSP Name List has changed. Inclusion of the NSP Change Count is only required if the base station transmits NSP List parameter in MAC management message. MIH Capability Support Always Indicates the IEEE 802.21 Media Independent Handover Services capability of the BS. Table 9-13 Content of a UCD MAC Management Message [1] Information Field in UCD Message Usage Description Uplink_Burst_Profile Always The Uplink_Burst_Profile is a compound TLV encoding that defines and associates a particular Uplink Interval Usage Code (UIUC) and the