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5.6 Multiplexed I PDUs

A Multiplexed I PDU contains a DynamicPart, an optional StaticPart and a selectorField. In case of multiplexing this I PDU is routed between the PDU Multiplexer and the Interface Layer.

A multiplexer is used to define variable parts within an I PDU that may carry different signals. The receivers of such a I PDU can determine which signal PDUs are transmitted by evaluating the selector field, which carries a unique selector code for each sub-part.

Multiplexed I PDUs

Fig. Multiplexed I PDUs

  1. Add Multiplexed I PDU → Short Name → Length(bytes)→ Selector Field Byte Order( MOST SIGNIFICANT BIT FIRST, MOST SIGNIFICANT BYTE LAST and OPAQUE) → Selector Field Length(bits) → Selector Field start Position →Trigger Mode (DYNAMIC PART TRIGGER,STATIC OR DYNAMICPORT TRIGGER, STATIC PORT TRIGGER and NONE) → Dynamic part and Static Part.Dynamic Part Number of Segment Byte Order( MOST SIGNIFICANT BIT FIRST, MOST SIGNIFICANT BYTE LAST and OPAQUE) → Segment Length(bits) → Segment Position → Save.

  2. Add Number of Alternative → Select I Signal I PDU →Initial Dynamic part → Selector Field Code -> PDU → Save.

  3. Static Part Number of Segment Byte Order( MOST SIGNIFICANT BIT FIRST, MOST SIGNIFICANT BYTE LAST and OPAQUE)→ Segment Length(bits) →Segment Position → Select PDU→ Select I Signal I PDU → Save.