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Unformatted text preview: ransfer Frames in order to provide increased
reliability through reduced complexity and lower resource consumption. In this case,
when a Type-BD Transfer Frame is received, an FDU in the process of being
delivered or ‘waiting’ to be delivered will be erased, without any indication to the
sending end in the CLCW. For this implementation, the sending end should
terminate any ongoing AD Service before starting a BD Service on the same Virtual
Channel. 2 Although the BD mode of transmission carries the name ‘Expedited’, BD mode is
neither a required method nor a faster method for inserting a Transfer Frame for
immediate delivery into a stream of Transfer Frames. If the link currently supports a
reliable AD service, then AD mode is recommended in such cases. Regardless of
whether AD or BD mode is used, the inserted Transfer Frame must not use the same
MAP address as an unfinished, multi-segment packet delivery process (a possible
exception would be delivering a control command to the Packet Assembly Process). 2.3 HOW TO READ THIS DOCUMENT COP-1 is one of the procedures performed by the protocol entity of the TC Space Data Link
Protocol (reference ). Section 3 of this document defines the interfaces between COP-1
and other procedures of the protocol entity that are used to define COP-1 in the succeeding
sections of this document.
COP-1 processes requests submitted by the users of the protocol with request primitives and
generates information to be given to the users with notification primitives (these interactions
with the users are performed indirectly through the Higher Procedures as explained in 3.2.2
and 3.3.2). Section 4 of this document defines details of the request and notification
primitives and complements the service definition of reference .
Each end of COP-1 (FOP-1 or FARM-1) is defined as a state machine. A state machine is an
abstract model of a machine that is in a state at a particular instance and transitions to a new
state performing certain actions when an event occurs. Sections 5 and 6 define the state
machine of FOP-1 and FARM-1, respectively. In each of these sections, internal variables
used by the...
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- Spring '14