We present a comprehensive steady-state analysis of threshold-ALOHA, distributed age-aware modification slotted ALOHA proposed in recent literature. In each terminal suspends its transmissions until the Age Information (AoI) status update flow it is sending reaches certain threshold ?. Once age exceeds ?, attempts transmission with constant probability ? slot, as standard ALOHA. analyze time-av...

In TDMA-based MAC (media access control) protocols for satellite network access, slotted ALOHA which has been widely deployed in Very Small Aperture Terminal (VSAT) systems. More recently, Generalized Retransmission Announcement Protocol (GRAP) was proposed in [5], which regroups the immediate access by contention at low loads and the reservation access at higher loads to achieve a better effic...

In this paper, we generalize a positive recurrence criterion for multidimensional discrete-time Markov chains over countable state spaces due to Rosberg (JAP, Vol. 17, No. 3, 1980). We revisit the stability analysis of well known slotted-Aloha protocol with finite number of queues. Under standard modeling assumptions, we derive a sufficient condition for the stability by applying our positive r...

Wireless random access protocols are attracting a revived research interest as simple yet effective solution for machine-type communications. In the quest to improve reliability and spectral efficiency of such schemes, use multiple receivers has recently emerged promising option. We study potential this approach considering population users that transmit data packets following slotted ALOHA pol...

This paper investigates the use of deep reinforcement learning (DRL) in the design of a “universal” MAC protocol referred to as Deep-reinforcement Learning Multiple Access (DLMA). The design framework is partially inspired by the vision of DARPA SC2, a 3-year competition whereby competitors are to come up with a clean-slate design that “best share spectrum with any network(s), in any environmen...

Radio frequency identification systems with passive tags dramatically increase the ability of an organization to acquire a vast array of data about the location and properties of any entity that can be physically tagged and wirelessly scanned within certain technical limitations. However, if multiple tags are to be identified simultaneously, messages from the tags can collide and cancel each ot...

A new MAC protocol is proposed for the reachback operation in a wireless sensor network deployed for reconstructing a random field. Referred to as QUality-of-service specific Information REtrieval (QUIRE), the proposed protocol optimizes the network performance under the metric of information rate per slot per Joule while ensuring a given QoS requirement. Based on the density of sensor deployme...

Recent work by the authors presents a novel class of signal space codes called Collision Resistant Modulations (CRM) for bandwidth e cient transmission on a random access collision channel, as in packet-radio applications. Results show that CRMs achieve a signi cant gain over traditional modulation formats under a Slotted ALOHA protocol. In this paper, we investigate the potentials of using CRM...

In this paper, we consider a wireless sensor network in which N nodes deliver the observed information of interest to remote receiver by competing for sharing channel through Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) protocol or slotted ALOHA protocol. For network, evaluate freshness two random multiple access protocols using age (AoI) metric. order explicitly express ave...