Stream-aware Scheduling to Improve Latency for Signaling Traffic using CMT-SCTP

Eklund, Johan, 1966- (author): Karlstads universitet,Institutionen för matematik och datavetenskap (from 2013),Distributed Systems and Communications Research Group (DISCO)

Grinnemo, Karl-Johan, 1968- (author): Karlstads universitet,Avdelningen för datavetenskap,Distributed Systems and Communications Research Group (DISCO)

Brunström, Anna, 1967- (author): Karlstads universitet,Avdelningen för datavetenskap,DISCO

(creator_code:org_t)

Abstract Subject headings

To mitigate delay spikes during transmission ofbursty signaling traffic, concurrent multipath transmission(CMT) over several paths in parallel could be an option. Still,unordered delivery is a well known problem when transmittingover asymmetric network paths, leading to extra delay due toHead-of-Line Blocking (HoLB). The Stream Control TransmissionProtocol (SCTP) is designed as a carrier for signaling trafficover IP to reduce the impact of HoLB. SCTP has support fortransmission of separate flows, called SCTP streams. SCTP iscurrently being extended with support for CMT (CMT-SCTP). Inthis paper, we address sender scheduling to optimize latency forsignaling traffic over CMT-SCTP. We present dynamic streamaware(DS) scheduling, which utilizes the SCTP stream concept,and continuously considers the current network status as well asthe data load to make scheduling decisions. We implement a DSScheduler and compare it against a dynamic path (DP) schedulerthat does not consider streams. Our investigation shows that DSscheduling could significantly reduce latency compared to a DPscheduler.

By the author/editor: Eklund, Johan, 1 ...; Grinnemo, Karl-J ...; Brunström, Anna, ...

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Electrical Engin ...; and Communication Sy ...

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