Many new narrowband low-power wide-area networks (LPWANs) (e.g., LoRaWAN, Sigfox) have opted to use pure ALOHA-like access for its reduced control overhead and asynchronous transmissions. Although reduces the energy consumption of IoT devices, network performance suffers from high intra-network interference in dense deployments. Contrarily, synchronous can improve throughput fairness, but it re...

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...

We consider a reservation-based medium access control (MAC) scheme where users reserve data channels through a slotted-ALOHA procedure. The base station grants access to users in a Rayleigh fading environment using measurements at the physical layer and system information at the MAC layer. This paper has two contributions pertaining to simple reservation based medium access. First, we provide a...

A dynamic reservation time division multiple access (DR-TDMA) control protocol that extends the capabilities of asynchronous transfer mode (ATM) networks over the wireless channel is proposed in this paper. DR-TDMA combines the advantages of distributed access and centralized control for transporting constant bit rate (CBR), variable bit rate (VBR), and available bit rate (ABR) traffic efficien...

The Packet Reservation Multiple Access (PRMA) protocol has been proposed as a candidate for the third generation of mobile radio systems to obtain a statistical multiplexing gain from the bursty character of speech, probably the main service to be provided by a mobile network. The PRMA is derived from the slotted Aloha protocol, and being a reservation protocol makes it suitable to cope with th...

A Dynamic Reservation TDMA Multiple Access Control (DR-TDMA) protocol that extends the capabilities of Asynchronous Transfer Mode (ATM) networks over the wireless channel is proposed in this paper. DR-TDMA combines the advantages of distributed access and centralized control for transporting Constant Bit Rate (CBR), Variable Bit Rate (VBR) and Available Bit Rate (ABR) tra c e ciently over a wir...

Packet switched technology has been demonstrated effective in cellular radio systems with short propagation delay, not only for data but also for voice transmission. In fact, packet voice can efficiently exploit speech on-off activity to improve bandwidth utilization over TDMA. Such an approach has been first suggested in the Packet Reservation Multiple Access (PRMA) technique, an adaptation of...

Past studies of Aloha have emphasized system-wide goals such as achieving maximum throughput or minimum delay. In this paper, we use game theory to analyze Aloha from the perspective of a selfish user. We construct an Aloha game and examine the optimal behavior of individual users. We show that the Aloha game has an equilibrium and that an Aloha system in which the users are selfish will be sta...

ABSTRACT This paper proposes and analyzes a distributed MAC protocol that achieves zero collision with no control message exchange nor synchronization. ZC (ZeroCollision) is neither reservation-based nor dynamic TDMA; the protocol supports variable-length packets and does not lose efficiency when some of the stations do not transmit. At the same time, ZC is not a CSMA; in its steady state, it i...