We study the problem of assigning non-overlapping geometric objects centered at a given set of points such that the sum of area covered by them is maximized. If the points are placed on a straight-line and the objects are disks, then the problem is solvable in polynomial time. However, we show that the problem is NP-hard even for simplest objects like disks or squares in R. Eppstein [CCCG, page...

In second and third generation cellular networks the rollout of base stations needs to be conscientiously prepared, because their radio configuration should match with the coverage provided by existing cells in their neighborhood. The detailed radio planning for every new cell requires considerable human resources and time. This paper proposes a framework for 3G Long Term Evolution (LTE) that c...

The purpose of this study was to examine the effects of short-term GSM (Global System for Mobile Communications) cellular phone base station RF-EMF (radiofrequency electromagnetic fields) exposure on psychological symptoms (good mood, alertness, calmness) as measured by a standardized well-being questionnaire. Fifty-seven participants were selected and randomly assigned to one of three differen...

A performance analysis of an access channel decoder is presented which exploits a diversity gain due to the independent magnitude of received signals energy at each of the antenna elements of a smart-antenna base-station transceiver subsystem (BTS) operating in CDMA2000 1X signal environment. The objective is to enhance the data retrieval at cellsite during the access period, for which the opti...

Repeaters have been an attractive solution for mobile operators to upgrade their wireless networks at low cost and to extend network coverage effectively. Since the first LTE commercial deployment in 2009, many mobile operators have launched LTE networks by upgrading their 3G and legacy networks. Because all 3G frequency bands are shared with the frequency bands for LTE deployment and 3G mobile...

Models for exposure assessment of high frequency electromagnetic fields from mobile phone base stations need the technical data of the base stations as input. One of these parameters, the Equivalent Radiated Power (ERP), is a time-varying quantity, depending on communication traffic. In order to determine temporal averages of the exposure, corresponding averages of the ERP have to be available....

We consider extensions and improvements on our previous work [1] on dynamic adaptive video streaming in a multi-cell multiuser “small cell” wireless network. In [1] we treated the case of single-antenna base stations and, starting from a network utility maximization (NUM) formulation, we devised a “push” scheduling policy, where users place requests to sequential video chunks to possibly differ...

This paper considers cooperation between primary and secondary users in shared spectrum radio networks via caching. A network consisting of a single macro (primary) base-station and multiple small (secondary) base-stations is considered. Secondary base-stations can cache some primary files and thereby satisfy content-requests generated from nearby primary users. For this cooperative scenario, w...

The following NDSC stations have been included as ozonesonde stations so far and are supposed to deliver sonde data to the NDSC data base: Ny-Ålesund, Thule, Eureka, Observatoire de Haute Provence, Mauna Loa, Lauder, Dumont d’Urville, McMurdo, South Pole. One should consider whether more stations should be included as there are more NDSC stations with ozonesonde facilities either at the site or...