Open AccessAn approximation delay between consecutive requests for congestion control in unicast CoAP-based group communication
Author(s) -
Chanwit Suwannapong,
Chatchai Khunboa
Publication year - 2019
Publication title -
international journal of electrical and computer engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.277
H-Index - 22
ISSN - 2088-8708
DOI - 10.11591/ijece.v9i3.pp1997-2005
Subject(s) - unicast , network congestion , computer science , computer network , limit (mathematics) , group (periodic table) , node (physics) , mathematics , multicast , engineering , network packet , mathematical analysis , chemistry , organic chemistry , structural engineering
This research presents a way to avoid network congestion during unicast CoAP-based group communication using increased delays between consecutive requests (DCR) in LoWPAN border routers to limit request send rates. It also provides a way to determine DCR values that are suitable for various network group sizes with differing node counts. The optimal DCR is obtained using the least squares approximation method and the relative minimum. Results from experimentation shows a positive relation, that is, an increase in group size necessitates an increase in DCR value. Experiments in various group sizes show favorable network performance and support the proposed congestion control method using DCR.