NDLI: Robust CSMA: Adapting to channel and traffic asymmetry

Content Provider	IEEE Xplore Digital Library
Author	Nardelli, B. Knightly, E.W.
Copyright Year	2015
Description	Author affiliation: LinkedIn, Mountain View, CA, USA (Nardelli, B.) \|\| Rice Univ., Houston, TX, USA (Knightly, E.W.)
Abstract	It has recently been shown that distributed queue-based adaptation of CSMA's contention aggressiveness can provably optimize network utility. However, such an approach is fragile, in that it suffers high performance degradation under conditions of asymmetric channels, heterogeneous traffic, and packet collisions. In this work, we address the main sources of performance degradation in optimal CSMA to design a distributed system for proportional-fair throughput that delivers high performance in a wide-range of network conditions. First, we generalize prior optimal CSMA models to incorporate individual per-link modulation and coding rates. With such a model, we derive adaptive principles that maximize utility under arbitrary channel capacities. Second, we propose a novel structure that can be used in the place of queues to provide optimal CSMA adaptation. As such a structure does not use traffic backlog to operate, the resulting adaptation is optimal for the set of backlogged flows under general traffic arrival patterns. Third, we propose a robustness function that reduces access attempts in high contention scenarios to avoid high performance degradation due to collisions. By evaluating our approach in combined scenarios that incorporate the three main sources of performance degradation, we observe vast performance gains, with an average 68% higher logarithmic utility compared to prior solutions.
Starting Page	127
Ending Page	135
File Size	274448
Page Count	9
File Format	PDF
e-ISBN	9781467373319
DOI	10.1109/SAHCN.2015.7338299
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-06-22
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Multiaccess communication Degradation Throughput Robustness Adaptation models Protocols Optimization
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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