Stability of reservation-contention resolution diversity slotted ALOHA for satellite networks

Abstract

Random access (RA) schemes for satellite networks (SATNETs) have been attracting renewed interest, with an increase in bursty traffic in SATNETs and military satellite communications (MILSATCOM). In particular, reservationcontention resolution diversity slotted ALOHA (R-CRDSA), an enhancement of CRDSA, is the latest RA scheme. R-CRDSA can achieve maximum throughput with fewer replicas and greater stability than CRDSA. In this paper, the stability of R-CRDSA is investigated. The stability must be analyzed before an RA scheme is used; it is the most important property of an RA scheme because a RA scheme's dynamics may make it unusable in a practical system. We formulate a model of the stability of the R-CRDSA scheme with which we can not only evaluate the stability of a system configuration but also predict the range of stable states. Therefore, this model can be used for the design of SATNETs and various service models planned for next-generation MILSATCOM.