ATM
Adaptation Layer (AAL)
Implemented in
the end-point
nodes only (routing is not addressed, this is covered by the ATM
layer)
Flow and timing
control, error correction, handling of lost and misinserted cells
Segmentation and
reassembly of data to fit into ATM cells (as cell payload)
CS
SAR
ATM cell payload
Hdr
Data block
Hdr
Higher layer data
SAR PDU
ATM Layer PDU