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Paper Abstract and Keywords
Presentation 2005-05-27 11:50
Improvement of a High-speed Method for Calculating Worst-case Link Delays in EDD Connection Admission Control Scheme
Ryuusuke Miyake, Tokumi Yokohira (Okayama Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) In order to calculate the worst-case link delays in the EDD (Earliest Due
Date) connection admission control scheme, a check called the point schedulability check is necessary for each of finite and discrete time instants (checkpoints).In our previous calculation method, high speed calculation is attained by decreasing a upper bound value of checkpoints.
However, the method can not calculate at high speed when networks are
temporarily in congested state.The purpose of the paper is to improve the previous method.The upper bound value of the previous method depends on the slope and the intercept of a linear function called a covering function, and its value drastically increases for the small increase of the slope and slowly increases for the small increase of the intercept.Because the previous method uses a covering function whose slope is large in the temporal congested state, the calculation time becomes large.The improved method uses a covering function whose slope is minimum and whose intercept somewhat larger than the previous method, and consequently the upper bound value of checkpoints become smaller.The improved method therefore can attain high speed calculation in the temporal congested state.Numerical examples show that the improved method drastically decrease the calculation time in the temporal congested state.
Keyword (in Japanese) (See Japanese page) 
(in English) Real Time Communication / Quality of Service / Connection Admission Control / Earliest Due Date First Scheduling / Worst-case Link Delay / / /  
Reference Info. IEICE Tech. Rep., vol. 105, no. 86, NS2005-37, pp. 53-56, May 2005.
Paper # NS2005-37 
Date of Issue 2005-05-19 (NS) 
ISSN Print edition: ISSN 0913-5685
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Conference Information
Committee NS  
Conference Date 2005-05-26 - 2005-05-27 
Place (in Japanese) (See Japanese page) 
Place (in English) NARA INSTITUTE of SCIENCE and TECHNOLOGY 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To NS 
Conference Code 2005-05-NS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Improvement of a High-speed Method for Calculating Worst-case Link Delays in EDD Connection Admission Control Scheme 
Sub Title (in English)  
Keyword(1) Real Time Communication  
Keyword(2) Quality of Service  
Keyword(3) Connection Admission Control  
Keyword(4) Earliest Due Date First Scheduling  
Keyword(5) Worst-case Link Delay  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Ryuusuke Miyake  
1st Author's Affiliation Okayama University (Okayama Univ.)
2nd Author's Name Tokumi Yokohira  
2nd Author's Affiliation Okayama University (Okayama Univ.)
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Speaker Author-1 
Date Time 2005-05-27 11:50:00 
Presentation Time 25 minutes 
Registration for NS 
Paper # NS2005-37 
Volume (vol) vol.105 
Number (no) no.86 
Page pp.53-56 
#Pages
Date of Issue 2005-05-19 (NS) 


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