Speculative Traffic

Supporting prefetching/presending vs. direct transfers


Speculative use of bandwidth

Using speculation to reduce latency reduces the maximum bandwidth requirements as well. The max. BW reduces by 10-100x, although the link utilization goes up by 10x, i.e., the idle periods are used. The result is an overall reduction in the bandwidth requirements, with an increase in performance.

Support prior to IntServ deployment

Speculation requires a user-settable "drop first" flag on packets, so that speculative traffic doesn't interfere with other, direct traffic. This can be deployed prior to Integrated Services deployment, using a mechanism currently under development at ISI.

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Last modified Mar. 21, 1996.