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- From: craig@sics.se (Craig Partridge)
- Newsgroups: comp.dcom.cell-relay
- Subject: followup to reordering thread
- Message-ID: <1992Aug30.164236.17945@sics.se>
- Date: 30 Aug 92 16:42:36 GMT
- Organization: Swedish Institute of Computer Science, Kista
- Lines: 19
-
- > 2) If no re-ordering occurs, does that mean that all I have to do
- > is collect the sequence of cells that have arrived on a VCI/VPI pair,
- > perform some application (TCP,TP4 etc) dependent error control on the
- > assembled packet, then just use the data (if re-transmission not needed).
-
- Yes. You receive cells and store them sequentially in a buffer. When
- you have a complete PDU, you do the AAL CRC, and pass the packet up to
- higher layers.
-
- > If the adaption layer is that simple under the no-reordering rule, then
- > why not pay the price in additional switch sophistication and get the
- > huge return in having a much simpler adaption layer?
- >
- > If re-ordering is then not allowed, then doesn't it make sense to have
- > a end-of-message, begin-of-message bit in the cell header?
-
- Yes. That's what AAL 5 is all about.
-
- Craig
-