For payloads with high requirements in time reference precision and public information, the general time data and public telemetry data provided by spacecraft platform is not sufficient. In contrast, some functional payloads have ability to output high-precision time and state measurement information, but their hardware interface resources are limited. To synchronize high-precision clock source of functional payload to other payloads with needs, the IEEE 1588v2 time synchronization protocol can be stacked into an optical fiber FC-AE-1553 network. Measurement information provided by the functional payload, such as location, attitude and orbit data, was then able to be sent to each payload NT terminal nodes distributed in whole network. A protocol was proposed to meet the demand of high precision time and public information of payloads, and also to avoid the resource information interface limitation of functional payloads. Design verification was carried out and the result shows that time data and public information supplied by the functional payload can successfully be sent to each node after the FC-AE-1553 network synchronization. The precision of data accepted by payload is three orders of magnitude higher compared with the information source of spacecraft platform, and the accuracy of UTC(universal time coordinated) time accepted is up to 100 ns.