This paper proposes an algorithm for user terminals in broadband slotted Aloha networks to jointly succeed in time synchronization, power adjustment, and registration to the network control center. The performance is analyzed considering nonnegligible initial time uncertainty, nonnegligible power uncertainty, and minimizing cochannel interference as well as binary feedback from the central rece...

xiv Chapter 1: Introduction 1 1.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.2 Motivation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.2.1 Communication Medium for UWSN . . . . . . . . . . . . . . . 3 1.2.2 The Vision of UWSN . . . . . . . . . . . . . . . . . . . . . . . 4 1.2.3 Acoustic Propagation and Sensornet Protocols . . . . . ....

Dolors Sala , John O. Limb , Sunil U. Khaunte Electrical and Computer Engineering, College of Computing Georgia Institute of Technology Atlanta, GA 30332 E-mail: fdolors,limb,[email protected] Abstract Cable plants were initially designed for one-way broadcast of analog television signals (from the head-end to the neighborhood). They are now being upgraded to provide an upstream path (from t...

Dolors Sala , John O. Limb , Sunil U. Khaunte Electrical and Computer Engineering, College of Computing Georgia Institute of Technology Atlanta, GA 30332 E-mail: fdolors,limb,[email protected] Abstract Cable plants were initially designed for one-way broadcast of analog television signals (from the head-end to the neighborhood). They are now being upgraded to provide an upstream path (from t...

A new single channel, TDMA-based broadcast scheduling protocol, termed the Five-Phase Reservation Protocol (FPRP), is presented for mobile ad hoc networks. The protocol jointly and simultaneously performs the tasks of channel access and node broadcast scheduling. The protocol allows nodes to make reservations within TDMA broadcast schedules. It employs a contention-based mechanism with which no...

Escrow reservations is a well-known synchronization technique, useful for inventory control, that avoids conflicts by taking into account the semantics of fragmentable object types. Unfortunately, current escrow techniques cannot be used on generic “commodity” servers because they require the servers to run the type-specific synchronization code. This is a severe limitation for systems that req...

ALOHA is a random multiple access technique useful for interactive computer working. It, however, suffers from the limitation that it requires a high power output from the earth station that is accessing the channel. Spread ALOHA, a variation of ALOHA proposed by Abramson eliminates this problem by using the technique of bit spreading. In this paper the results of a simulation study on the erro...

In June 1971, the first two-way wireless transmission of data packets within a computer network was achieved at the Manoa campus, University of Hawaii, Honolulu [1]. The ALOHANet was an experimental UHF radio network designed and implemented at the University of Hawaii at a time when the only other option for remote access to information resources was based upon the use of inflexible, slow, and...

Although the idea of using wireless links for covering large areas is not new, advent LPWANs has recently started changing game. Simple, robust, narrowband modulation schemes permit implementation low-cost radio devices offering high receiver sensitivity, thus improving overall link budget. The several technologies belonging to LPWAN family, including well-known LoRaWAN solution, provide a cost...

Code-division multiple-access (CDMA) schemes appear to be very promising access techniques for coping with the requirements of third-generation mobile systems, mainly because of their flexibility. This paper proposes an adaptive S-ALOHA DS-CDMA access scheme as a method for integrating nonreal-time (i.e., Internet applications) and real-time (i.e., voice) services in a multicell scenario by exp...