Communications of the ACM
Researchers Propose Solution to 'Bufferbloat'
Credit: Kenneth Finnegan
Xerox PARC's Van Jacobson and Pollere's Kathleen Nichols have developed Controlled Delay (CoDel), a queue management mechanism designed to solve the "bufferbloat" problem, which happens when packet buffering causes high latency and jitter and reduces overall network throughput.
CoDel is designed to provide a "no-knobs" approach to queue management to overcome bufferbloat. CoDel dynamically resizes the buffer at the edge, so that the buffer keeps a sufficient number of packets to handle jitter without fooling the sender into picking the wrong Transmission Control Protocol window size. CoDel uses a local minimum queue to estimate the end-to-end ideal queue size. The traffic is then measured to see how long it is above or below the minimum queue estimate, and the measurement is based on packet-sojourn time rather than in terms of bytes or packets.
Since it is a self-contained algorithm, it requires no configuration, and the researchers believe it is suitable for modern packet buffers and could be added to edge devices at a minimal cost.
From The Register (UK)
View Full Article
Abstracts Copyright © 2012 Information Inc. 
, Bethesda, Maryland, USA
No entries found