Question: Upon receiving a CELL SYNCHRONISATION RECONFIGURATION REQUEST message for a 1.28Mcps TDD system, how does the Node B adjust the DwPCH power when the message includes the DwPCH Power IE?
Option 1: The Node B immediately sets the DwPCH power to the specified value for all subsequent transmissions.
Option 2: The Node B stores the new DwPCH power value but only applies it during normal operational transmissions, not for synchronization purposes.
Option 3: The Node B ignores the DwPCH Power IE for 1.28Mcps TDD systems as it's relevant only to 3.84Mcps TDD.
Option 4: The Node B stores the DwPCH power value and applies it specifically for subsequent Node B synchronization transmissions, reverting to normal levels during regular operations.
Explanation: According to the specifications for 1.28Mcps TDD systems, when a CELL SYNCHRONISATION RECONFIGURATION REQUEST message includes the DwPCH Power IE, the Node B is instructed to store this power value. This stored value is then used specifically for transmissions of the DwPCH that are intended for Node B synchronization. For all other (normal operation) transmissions of the DwPCH, its power reverts to its standard level. This nuanced application based on transmission context highlights the importance of precise configuration in maintaining optimal network performance and synchronization.