Mobile telephony

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

Architecture Harmonization Between Cloud Radio Access Networks and Fog Networks

Abstract: To guarantee the ubiquitous and fully autonomous Internet connections in our daily life, the new technical challenges of mobile communications lie on the efficient utilization of resource and social information. To facilitate the innovation of the fifth generation (5G) networks, the cloud radio access network (RAN) and fog network have been proposed to respond newly emerging traffic demands. The cloud RAN functions more toward centralized resource management to achieve optimal transmissions. The fog network takes advantage of social information and edge computing to efficiently alleviate the end-to-end latency. In this paper, we conduct a comprehensive survey of these two network structures, and then investigate possible harmonization to integrate both for the diverse needs of 5G mobile communications. We analytically study the harmonization of cloud RAN and fog network from various points of view, including the cache of Internet contents, mobility management, and radio access control. The performance of transition between the cloud RAN and the fog network has been presented and the subsequent switching strategy has been proposed to ensure engineering flexibility and success.

Energy consumption analysis of video streaming to Android mobile devices

Abstract: Energy conservation has become a critical issue around the world. In smart phones, battery power capabilities are not keeping up with the advances in other technologies (e.g., processing and memory) and are rapidly becoming a concern, especially in view of the growth in usage of energy-hungry mobile multimedia streaming. The deficiency in battery power and the need for reduced energy consumption provides motivation for researchers to develop energy efficient techniques in order to manage the power consumption in next-generation wireless networks. As there is little analysis in the literature on the relationship between the wireless environment and the mobile device energy consumption, this paper investigates the impact of network-related factors (e.g., network load and signal quality level) on the power consumption of the mobile device in the context of video delivery. This paper analyzes the energy consumption of an Android device and the efficiency of the system in several scenarios while performing video delivery (over UDP or TCP) on an IEEE 802.11g network. The results show that the network load and the signal quality level have a combined significant impact on the energy consumption. This analysis can be further used when proposing energy efficient adaptive multimedia and handover mechanisms.

Design and evaluation of UMTS-WLAN interworking strategies

Abstract: High tier wireless systems such as GPRS and UMTS provide users with high mobility but less bandwidth. On the other hand, low tier wireless systems such as wireless LAN offer high bandwidth with less mobility. The support of seamless roaming between heterogeneous wireless networks is regarded as one of the key issues in future mobile communication systems. The paper presents the design and evaluation of three possible UMTS-WLAN interworking strategies, i.e. Mobile IP approach, gateway approach, and emulator approach based on the current UMTS, WLAN and Mobile IP specifications. Recommendations to UMTS-WLAN interworking strategies according to different deployment scenarios are also discussed.

Enhancing wirelass lan capacity using transmission power control

Abstract: A method for mobile communication by access points (22, 23, 25, 27) in a wireless local area network (WLAN) includes transmitting a first downlink signal on a common frequency channel from a first access point to a first mobile station (24), at a first downlink power level, which is adjusted responsively to a first uplink power level transmitted from the first mobile station to the first access point. If the first downlink signal received at a second access point is below a predetermined interference threshold, the second access point may transmit a second downlink signal on the common frequency channel to a second mobile station (29), simultaneously with transmission of the first downlink signal from the first access point to the first mobile station. The capacity of the WLAN may thus be substantially increased.

Mobile Identity: Youth, Identity, and Mobile Communication Media

Abstract: (sixteen-year old girl) The girl who is quoted above expresses an immediate understanding of the mobile phone’s dual, but interdependent qualities for young people. One quality is the communicative function, which is facilitated by the technological device: it is about the mobile as a tool and a channel for the exchange of information. The other quality is the social meaning, which develops from the communication. Rich Ling describes the mobile phone as being doubly articulated, that is, it is a physical device but it is also a medium through which we communicate and through which we maintain social contact. 2 In short, the meaning of the mobile goes beyond its practical function. The quote also indicates the young girl’s perception of the mobile as holding a specific meaning for young people as compared to adults: that is, the value of the mobile depends on contextual uses and experiences. The focus of this article is on the meaning of the mobile in young people’s lives, specifically in relation to questions of identity. In the crossover between this volume’s three key themes— youth, learning, and identity—other issues might well have been included, for example the use of mobile platforms in education and formal learning, 3 or organized projects on how to explore and exploit mobile digital platforms for creative and innovative purposes. My aim, however, is to take a closer look at the mundane and everyday uses of this medium by young people in relation to identity and learning. Because of the always there, always on status of the mobile and the pace of exchange of information, and because the mobile is the key personal communication device for so many young people, it becomes important in establishing social norms and rules and in testing one’s own position in relation to the peer group.