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Mobile telephony

About: Mobile telephony is a research topic. Over the lifetime, 38008 publications have been published within this topic receiving 553646 citations.


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Journal ArticleDOI
01 Dec 2010
TL;DR: This work builds upon a previously developed distributed gradient-based coverage control scheme to include three additional capabilities: allowing polygonal obstacles, including limited sensing field-of-view constraints, and preserving network connectivity through a provably correct algorithm using each node's routing information.
Abstract: We study wireless sensor networks whose objective is to control the locations of mobile nodes so as to maximize the probability of detecting randomly occurring events in a mission space and to extract information from data sources, when detected, with maximal effectiveness. The control system for the mission is composed of three components executed in parallel on sensor nodes: coverage control, data source detection, and data collection. In order to maximize the joint detection probability of random events in a given mission space, we build upon a previously developed distributed gradient-based coverage control scheme to include three additional capabilities: allowing polygonal obstacles, including limited sensing field-of-view constraints, and preserving network connectivity through a provably correct algorithm using each node's routing information. In order to combine coverage and data collection, we formulate and solve a modified optimization problem with these two objectives. The interactions among the three components of the sensor network control system are discussed and simulation examples are presented to illustrate our results.

208 citations

Posted Content
TL;DR: In this paper, the feasibility, advantages and challenges of future wireless communications over the E-band frequencies are investigated, based on which some potential fixed and mobile applications at the Eband are investigated.
Abstract: With the formidable growth of various booming wireless communication services that require ever-increasing data throughputs, the conventional microwave band below 10 GHz, which is currently used by almost all mobile communication systems, is going to reach its saturation point within just a few years. Therefore, the attention of radio system designers has been pushed towards ever-higher segments of the frequency spectrum in a quest for capacity increase. In this article, we investigate the feasibility, advantages and challenges of future wireless communications over the E-band frequencies. We start from a brief review of the history of E-band spectrum and its light licensing policy as well as benefits/challenges. Then we introduce the propagation characteristics of E-band signals, based on which some potential fixed and mobile applications at the E-band are investigated. In particular, we analyze the achievability of non-trivial multiplexing gain in fixed point-to-point E-band links and propose an E-band mobile broadband (EMB) system as a candidate for the next generation mobile communication networks. The channelization and frame structure of the EMB system are discussed in details.

208 citations

Journal ArticleDOI
TL;DR: A contract-theoretic approach is proposed to solve the problem of providing incentives for D2D communication in cellular networks and results show that the contract can effectively incentivize users' participation, and increase capacity of the cellular network than the other mechanisms.
Abstract: Device-to-device (D2D) communication is viewed as one promising technology for boosting the capacity of wireless networks and the efficiency of resource management D2D communication heavily depends on the participation of users in sharing contents Thus, it is imperative to introduce new incentive mechanisms to motivate such user involvement In this paper, a contract-theoretic approach is proposed to solve the problem of providing incentives for D2D communication in cellular networks First, using the framework of contract theory, the users' preferences toward D2D communication are classified into a finite number of types, and the service trading between the base station and users is properly modeled Next, necessary and sufficient conditions are derived to provide incentives for users' engagement in D2D communication Finally, our analysis is extended to the case in which there is a continuum of users Simulation results show that the contract can effectively incentivize users' participation, and increase capacity of the cellular network than the other mechanisms

208 citations

Patent
01 Mar 2001
TL;DR: In this paper, a system and method for managing the provisioning of location information on a mobile communications unit (e.g., a cellular phone) is disclosed, where the general location of the mobile communication unit may be determined.
Abstract: A system and method for managing the provisioning of location information on a mobile communications unit (e.g., a cellular phone) is disclosed. When a request for location information on a particular mobile communications unit is received, the general location of the mobile communications unit may be determined. This general location information may then be used to determine if any position determination equipment site would be able to provide the desired location information. Therefore, a request for location information on a given mobile communications unit is not invoked to a particular position determination equipment site until it has been first determined that the position determination equipment site would in fact be able to provide the desired location information.

207 citations

Book
01 Oct 1997
TL;DR: The first edition of this classic reference work explained the design and development of mobile radio systems for voice and data in rigorous yet clear terms is updated to cover all the new technologies that are changing the face of mobile communications.
Abstract: From the Publisher: The first edition of this classic reference work explained the design and development of mobile radio systems for voice and data in rigorous yet clear terms. Now Dr. William Lee has fully updated his guide to cover all the new technologies that are changing the face of mobile communications. Instead of merely describing the various existing and emerging systems, Dr. Lee helps you understand the crucial differences between applications for wireline and wireless communications.

206 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20242
202351
2022149
2021339
2020558
2019707