Abstract
A spacecraft complying with the CCSDS Packet Telemetry and Telecomand standards generates telemetry data and accepts command data as streams of packets. Generally, each packet has different requirements for data transfer characteristics (such as delay and reliability). These kinds of requirements are called Quality of Service (QoS) requirements. Presently, each project develops a project-specific method to meet these QoS requirements. This paper proposes an extension to the Packet Telemetry and Telecomand standards to specify QoS requirements for each packet. The method proposed in this paper is to associate a parameter called Flow Label with each packet. This paper shows that space data systems (both onboard data systems and ground operations systems) that can meet various QoS requirements of space projects can be constructed with this generic method and that projects can save cost of developing data systems by eliminating development of project-specific systems.
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