| 摘要 |
Methods and apparatus for applying changes to a group of objects. A method is provided for applying one or more changes to a group of objects. The method includes communicating the one or more changes to the group of objects at one or more communication times, and receiving one or more acknowledgement signals. The method also includes determining a sync time indicator associated with a selected object, wherein the sync time indicator indicates a time when a selected acknowledgement signal has been received from the selected object for each change communicated prior to the sync time indicator, and comparing the sync time indicator with a last communication time to determine whether the one or more changes have been applied to the selected object.
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