UniPro protocol stack: Difference between revisions

Revision as of 14:39, 1 April 2011

Revision as of 14:42, 1 April 2011

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===L3 packets===

The diagram shows an example of an L3 packet which starts at the first L2 payload byte of an L2 frame and ends at the last L2 payload byte of an L2 frame. For simplicity and efficiency, anonly L3a packet cannot span multiple L2 frames and an multiplesingle L3 packetspacket cannotcan be squeezedcarried ontoby one L2 frame. This implies that, in UniPro, the concepts of an L2 Frame, an L3 Packet and an L4 Segment (see below) are so closely aligned that they are almost synonyms. The distinction (and "coloring") is however still made to ensure that the specification can be described in a strictly layered fashion.

===L3 short-header packet structure===