Objective To investigate the risk of tumours in the central nervous system among Danish mobile phone subscribers. Design Nationwide cohort study.

In cellular industry, security has been a major concern for both service providers and subscribers. Service providers are primarily concerned with security to prevent fraudulent operations such as cloning or subscription fraud, while subscribers are mainly concerned with privacy issues. This paper gives a description of the access security mechanism found in CDMA2000 technology and discusses ho...

It is becoming more and more apparent that the vast majority of subscribers in developing countries will be receiving wireless broadband information services through mobile terminals. To make the growth in mobile technology and services sustainable, stakeholders of the mobile value chain need to address the cost and reliability issues for mobile services. In this paper three mobile service affo...

High-speed railway private cellular network provides voice and data services for passengers. It brings much signaling cost as a great many of mobile subscribers ask for location updating simultaneously. Moreover, it leads to plenty of control signaling channel requests. This paper presents two novel location updating schemes, that is, “clustering location management” and “mobile group location ...

Besides conventional cellular mobile radio networks like, e.g., GSM, with voice communication being the main application, other technologies primarily used for local Internet access – especially Wireless LAN – are gaining momentum. However, while mobility is an inherent feature of cellular radio networks, it is not well supported by the various wireless extensions of local area networks yet. Fo...

Mobile companies today offer diversity of user subscription services to their subscribers in order to attract their attention. In order subscribers effectively to use that service they have to choose appropriate subscription service package. Choosing the appropriate subscription service is not always simple decision, using the knowledge discovery process can help customers to make the right cho...

The WiMAX technology offers a versatile mobile services platform, which enables operators to provide differential Quality of Service (QoS) for fulfilling subscribers’ various requirements. WiMAX operators need to allocate enough resources to make all subscribers satisfied to avoid “user churn” that subscribers will unsubscribe services due to dissatisfaction with allocated resources. This resou...

To obtain a high data rate that is commensurate with the growing demand for internet services, fifth generation (5G) cellular networks will use bandwidth beyond 6 GHz, called millimeters waves (mm-waves), to higher. The first phase (phase I) of 5G network design user density, where optimized microcells are deployed at carrier frequency 700 MHz 20 bandwidth. second II) consists deployment which ...