A multichannel reservation-based channel-access protocol is investigated in this paper. Under this protocol, one channel is used to exchange reservation messages and the remaining channels are used for information-bearing trajjic. The performance of this scheme is compared to that of a singlechannel reservation-based protocol. A simple contentionbased slotted-Aloha protocol is also considered. ...

\ DL Abstract A multiple access protocol with a Eoperative channel (COCH) and a COCH allocation scheme to improve the delay and throughput of a minislot ALOHA reservation protocol is proposed. In it, the request access (RA) message of a mobile terminal (MT) is randomly piggybacked to the base station ( B S ) through a COCH minislot in the uplink (UL) provided by its assistor MT which is assigne...

The rapid technological advances and innovations of the past few decades have pushed wireless communication from concept to reality. The popularity of wireless communication systems can be seen almost everywhere in the form of cellular networks, WLANs, and WPANs. Packet-switched technology has been demonstrated as effective in cellular radio systems with short propagation delay, not only for da...

Packet Reservation Multiple Access (PRMA) can be viewed as a combination of TDMA and slotted ALOHA protocols. In PRMA, there are speech and data terminals that communicate with a base station. Downlink packets are scheduled by the base station, but for uplink access (first packet of a talkspurt or any data packet), terminals use slotted ALOHA. Speech terminals (and some data terminals, too) can...

In a wireless network, where propagation delay is high but known, slotted Aloha (S-Aloha) is synchronized with respect to the receiver’s time slots. Since the transmitter knows the propagation delay to its receiver, after a frame is generated, the transmitter introduces a suitable delay before its transmission, such that the frame arrives exactly in a slot at the receiver. However, in an underw...

A key feature in the design of any MAC protocol is the throughput it can provide. In wireless networks, the channel of a user is not fixed but varies randomly. Thus, in order to maximize the throughput of the MAC protocol at any given time, only users with large channel gains should be allowed to transmit. In this paper, compressive sensing based opportunistic protocol for throughput improvemen...

We propose a new packet reservation multiple access (PRMA) scheme for the joint transmission of voice and data traffics in a microcellular medium. The collision resolution protocol within the system is based on a modification of the window random access algorithm, which has superior properties compared to the conventional slotted Aloha. The proposed algorithm, which we call packet reservation w...

Future microcellular systems will require distributed network control. A packet-switched network is particularly suitable for this requirement. Moreover, packet switching naturally accommodates speech activity detection to improve Vation-ALOHA protocol for packet speech transmission from wireless terminals to a base station. Because PRMA is a statistical multiplexer, the channel becomes congest...

Packet switched technology has been demonstrated attractive for use in cellular radio systems with short propagation delay, not only for data but also for voice. In fact, packet voice can eeciently exploit speech on-oo activity to improve bandwidth use over TDMA. Such an approach has been rst suggested in 1], where Packet Reservation Multiple Access, an adaptation to the cellular environment of...

This paper analyzes and optimizes the average Age of Information (AAoI) Frame Slotted ALOHA with Reservation Data slots (FSA-RD) in a multi-access network, where multiple users transmit their randomly generated status updates to common access point framed manner. Each frame consists one reservation slot several data slots. The is further split into mini-slots. In each slot, that want update wil...