THROUGHPUT DELAY FOR MIXED-LENGTH, MIXED-PERIOD PACKETS WITH BUSY-SENSE MULTIPLE-ACCESS PROTOCOL
International Telemetering Conference Proceedings / October 13-15, 1981 / Bahia Hotel, San Diego, California === Packet TM of asynchronous multi-instrumented spacecraft requires framing of packets having different lengths and different arrival intervals. A similar situation would occur in a genera...
Main Author: | |
---|---|
Other Authors: | |
Language: | en_US |
Published: |
International Foundation for Telemetering
1981
|
Online Access: | http://hdl.handle.net/10150/615401 http://arizona.openrepository.com/arizona/handle/10150/615401 |
Summary: | International Telemetering Conference Proceedings / October 13-15, 1981 / Bahia Hotel, San Diego, California === Packet TM of asynchronous multi-instrumented spacecraft requires framing of packets
having different lengths and different arrival intervals. A similar situation would occur in a
general message networking application with messages of arbitrary length and arrival rate
at a network node. Use of a bus-system for packet transfer, or an order wire for message
transfer, requires a minimum rate of status inquiry, and of data read rate, to insure stability
and non-overloading.
Our paper offers a rather general, but compact, throughput delay analysis suited to packet
characteristics from uniform to source-dependent period and length. Arrival probability
may vary from “soft” or uniform to “hard” arrival induced by slotted delay. The arrival
probability is modular in source packet-period. A closed solution form, though expressible,
is not tractable, and a recursive solution was used to obtain numerical results.
Computed throughput delays for various combinations of identical sources and mixed
sources are illustrated. For identical sources, under “hard” periodic arrival probability,
channel slotting is desirable to maintain channel capacity. Some comparative results are
offered. For mixed sources with source-dependent packet length and rate, slotting may not
be feasible or efficient. Only read-rate controls the expected throughput.
The analysis and results shown should prove helpful both to further study and present
application of packet TM and message networking. |
---|