Verizon (mobile network)

Summary

Verizon is an American wireless network operator that previously operated as a separate division of Verizon Communications under the name Verizon Wireless. In a 2019 reorganization, Verizon moved the wireless products and services into the divisions Verizon Consumer and Verizon Business, and stopped using the Verizon Wireless name. Verizon is the second-largest wireless carrier in the United States, with 143.3 million subscribers at the end of Q4 2022. The company is headquartered in Basking Ridge, New Jersey. It was founded in 2000 as a joint venture of American telecommunications firm Bell Atlantic, which would soon become Verizon Communications, and British multinational telecommunications company Vodafone. Verizon Communications became the sole owner in 2014 after buying Vodafone's 45-percent stake in the company. It operates national 5G and 4G LTE networks covering about 99 percent of the U.S. population, whic

Official source

https://en.wikipedia.org/wiki/Verizon_(mobile_network)

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Energy-Proportional Single-Carrier Frequency Domain Equalization for mmWave Wireless Communication

Andreas Peter Burg, Nicholas Alexander Preyss, Sara Rodriguez Egea

mmWave wireless communication is proposed for high-throughput and high-density applications. Due to the large channel bandwidth, mmWave systems face a large variation in the observed delay spread. Many proposed single-carrier (SC) mmWave systems rely on cyclic-prefix (CP) frequency domain equalization (FDE) in order to deal with worst case channel conditions. A downside of CP-FDE receivers is their constant energy consumption independent of the actual channel conditions. The alternative overlap-save (OS) FDE receiver can adapt its complexity, but exhibits an inferior equalization performance. By proposing a hybrid FDE approach the receiver can adapt its complexity and therefor its power consumption dynamically to the given channel conditions. Using the structural similarity of overlap-save and cyclic-prefix FDE architectures the proposed hybrid receiver can switch between the two modes of operation with minimum required hardware overhead. It is shown that the proposed hybrid receiver can significantly reduce its complexity in benign channel conditions while still matching the equalization properties of a conventional CP-FDE receivers in very frequency selective environments.

2015

Track Me If You Can: On the Effectiveness of Context-based Identifier Changes in Deployed Mobile Networks

Imad Aad, Igor Bilogrevic, Laurent Bindschaedler, Jean-Pierre Hubaux, Murtuza Jadliwala, Valtteri Niemi

Location privacy is a major concern in an increasingly connected and highly pervasive network of mobile users. Novel location-based applications and device-to-device services (on these mobile devices) are gaining popularity, but at the same time, these services allow curious service providers and eavesdroppers to track users and their movements. Earlier research efforts on location-privacy preservation, which were mostly based on identifier-change mechanisms in spatio-temporal de-correlation regions called mix-zones, show that coordinated identifier-change techniques are reasonably effective in a simulation setting, although some smart attacks are still possible. However, a thorough analysis of these mechanisms that takes into consideration communication patterns and mobility from a real-life deployment is missing from these results. In this paper, we evaluate in a real-life setting the effectiveness of standard mix-zone-based privacy protection mechanisms against probabilistic tracking attacks. Our exper- iments involved 80 volunteers carrying smartphones for 4 months and being constantly eavesdropped on an adversarial mesh network of standard wireless Access Points (APs). To the best of our knowledge, this is the first study that provides empirical evidence about the effectiveness of mix-zone-based privacy-preserving mechanisms against practical adversaries in upcoming wireless and mobile systems.

Internet Society2012