Pushing Uplink Goodput of an Asymmetric Access Network Beyond Its Uplink Bandwidth

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Executive Summary

Asymmetric access networks with downlink bandwidth 10 - 1000 times higher than uplink bandwidth are common, and upgrading these links may not be economically feasible in many usage scenarios. In this paper, the authors design, implement, and evaluate a parameterized Asymmetric Communication Layer (ACL) protocol that capitalizes the otherwise idling downlink bandwidth to boost the uplink goodput. The ACL protocol is different from existing techniques such as caching, protocol-independent redundancy elimination, WAN optimization, and online compression algorithms, because the ACL protocol is the first concrete network protocol to increase uplink goodput using downlink bandwidth.

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