ABSTRACT
This chapter focuses on low delay communication methods that SCTP can provide for real-time multimedia applications. The basic strategy to select a path with lower delay for transmission is described. Most works use SCTP internal variable SRTT (smoothed round-trip time) as estimation of the current delay on each path. It is calculated based on acknowledgments received (data and heartbeat). Other parameters such a delay threshold, guard time, losses are also employed to prevent unnecessary route changes. Quality improvements under specific scenarios are evaluated and several examples are shown. Asymmetric communication aspects are described and commented. Discussions and future directions finishes the chapter.
