The Library
A φ-competitive algorithm for scheduling packets with deadlines
Tools
Veselý, Pavel, Chrobak, Marek, Łukasz, Jeż and Sgall, Jiří (2019) A φ-competitive algorithm for scheduling packets with deadlines. In: ACM-SIAM Symposium on Discrete Algorithms (SODA19), San Diego, California, USA, 6-9 Jan 2019. Published in: Proceedings of the 30th ACM-SIAM Symposium on Discrete Algorithms (SODA19) ISBN 9781611975482. doi:10.1137/1.9781611975482.9
|
PDF
WRAP-φ-competitive-algorithm-scheduling-packets-deadlines-Vesely-2019.pdf - Published Version - Requires a PDF viewer. Download (1251Kb) | Preview |
|
PDF
WRAP-φ-competitive-algorithm-scheduling-packets-deadlines-Vesely-2018.pdf - Accepted Version Embargoed item. Restricted access to Repository staff only - Requires a PDF viewer. Download (708Kb) |
||
PDF
dcs-191118-wrap--soda19-copyright (002).pdf - Other Embargoed item. Restricted access to Repository staff only - Requires a PDF viewer. Download (88Kb) |
Official URL: https://doi.org/10.1137/1.9781611975482.9
Abstract
In the online packet scheduling problem with deadlines (PacketScheduling, for short), the goal is to schedule transmissions of packets that arrive over time in a network switch and need to be sent across a link. Each packet has a deadline, representing its urgency, and a non-negative weight, that represents its priority. Only one packet can be transmitted in any time slot, so, if the system is overloaded, some packets will inevitably miss their deadlines and be dropped. In this scenario, the natural objective is to compute a transmission schedule that maximizes the total weight of packets which are successfully transmitted. The problem is inherently online, with the scheduling decisions made without the knowledge of future packet arrivals. The central problem concerning PacketScheduling, that has been a subject of intensive study since 2001, is to determine the optimal competitive ratio of online algorithms, namely the worst-case ratio between the optimum total weight of a schedule (computed by an offline algorithm) and the weight of a schedule computed by a (deterministic) online algorithm. We solve this open problem by presenting a ϕ-competitive online algorithm for PacketScheduling (where ϕ ≈ 1.618 is the golden ratio), matching the previously established lower bound.
Item Type: | Conference Item (Paper) | ||||||||
---|---|---|---|---|---|---|---|---|---|
Divisions: | Faculty of Science, Engineering and Medicine > Science > Computer Science | ||||||||
Journal or Publication Title: | Proceedings of the 30th ACM-SIAM Symposium on Discrete Algorithms (SODA19) | ||||||||
Publisher: | SIAM | ||||||||
ISBN: | 9781611975482 | ||||||||
Official Date: | 2019 | ||||||||
Dates: |
|
||||||||
DOI: | 10.1137/1.9781611975482.9 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||
Date of first compliant deposit: | 23 November 2018 | ||||||||
Date of first compliant Open Access: | 17 September 2019 | ||||||||
Conference Paper Type: | Paper | ||||||||
Title of Event: | ACM-SIAM Symposium on Discrete Algorithms (SODA19) | ||||||||
Type of Event: | Conference | ||||||||
Location of Event: | San Diego, California, USA | ||||||||
Date(s) of Event: | 6-9 Jan 2019 | ||||||||
Related URLs: |
Request changes or add full text files to a record
Repository staff actions (login required)
View Item |
Downloads
Downloads per month over past year