In universal personal telecommunication (UPT) environments, UPT networks retain information related to incall registration in UPT user service profiles in order to provide incoming UPT calls for UPT users at any terminal in any location. As UPT networks support incall registration, terminal users can be different from terminal owners, and several UPT users can register on a single terminal for ...

We address a variant of the Steiner tree problem for delay constrained problems. The addressed consists in determining minimum cost tree, while guaranteeing that between any two terminal nodes does not exceed given maximum value. This is known as bounded diameter problem. propose compact formulation based on integer linear programming (ILP) to obtain optimal solutions, which was efficiently sol...

This contribution proposes for Recommendation G.812 (1) a holdover specification for Clock Type II that is consistent with the current specification of 10 per day and is not broken into aging, temperature, and initial offset components and (2) a modification to the output wander TDEV mask, to apply only to Types II and III, to make the mask consistent with the respective wander generation TDEV ...

Key management plays fundamental role in research on security service in wireless sensor networks (WSNs). However, due to the resource constraints, establishing pairwise keys in WSNs is not a trivial tasks. Several exiting key management schemes have been proposed in literature to establish pairwise keys between sensor nodes, but they either can not offer strong resilience against node capture ...

INTRODUCTION RAPID advancement of semiconductor integratedcircuit technology has reduced the cost of mobile telecommunication terminals year by year. The global systems for mobile communications (GSM),1) which was standardized mainly by European countries, has enhanced the large scale integration of radio-frequency circuits because mobile telecommunication systems of European countries do not r...

Abstract The Lucy Mission accomplishes its science during a series of five flyby encounters with seven Trojan asteroid targets. This mission architecture drives concept operations design that maximizes return, provides redundancy in observations where possible, features autonomous fault protection, and utilizes onboard target tracking near closest approach. These considerations reduce risk the ...