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Traditional polarization diversity systems have relied on the distribution of obstacles within the mobile medium to achieve signal decorrelation and power coupling between orthogonal polarizations. If the channel does not facilitate adequate power coupling, signal diversity is suboptimal because signal contribution from the polarization with lesser power is limited. Further, due to the presence of...
Recently there has been a need to incorporate the use of mobile computing devices in hospital or clinical applications, to enhance patient care. The advancement of wireless technology has created unique mechanisms of interaction that can meet the needs of e-health system robustness, reliability and accuracy requirements. This paper presents an interactive wireless medical information system that allows...
The growing deployment of mobile video applications is calling for new methods to measure quality as perceived by humans. The suitable quality metrics may explore spatial and temporal video features that quantify the presence of related artifacts in an examined mobile video service. Considering a video as a sequence of images, computation of spatial features for each involved image would pose significant...
Localized mobility protocols are designed to address many of the drawbacks such as additional signaling and over-the-air tunnel overhead associated with global mobility protocols like Mobile IPv4 and Mobile IPv6. Proxy Mobile IPv6 is one such network controlled localized protocol defined in the IETF Although Proxy Mobile IPv6 can resolve longer binding update and tunnel overhead related issues when...
Despite the inherent support, the QoS performance of real-time Multicast and Broadcast Service (MCBCS) such as Mobile TV over TDD-OFDMA remains unclear. From the network operator's perspective, it is of paramount concern to understand the quality of the broadcast/multicast video and how many (mobile TV) can be supported with the required quality, together with respective design options of the network...
In an all-IP environment of internetworked heterogeneous mobile data networks, ongoing data sessions from roaming users are subjected to frequent vertical handoffs. Under such circumstances, careful consideration must be given for the selection of an appropriate vertical handoff mechanism to ensure seamless service continuity and desired Quality of Service (QoS) levels. Therefore, efficient methods...
An ad hoc network is a peer-to-peer network without no centralised server. Mobile ad hoc network(MANETs) is a promising new wireless communications paradigm in which network device may move around and end hosts may function as a router. It is a key of success of being deployed to properly address the security problems. Although many research focus on how to deliver packets from one node to another,...
This paper considers the Multiple Input Multiple Output (MIMO) capacity enhancement considering the Universal Mobile Telecommunication System (UMTS) Long Term Evolution (LTE) technology, in the downlink, including the effects of system bandwidth and Signal-to-Noise Ratio (SNR) efficiency. Firstly, the system bandwidth efficiency is calculated for LTE framework. Then, the SNR efficiency using Adaptive...
This paper describes a double time difference of arrival (DTDOA) method with Kalman filtering for tracking a mobile node in an ad hoc network. The DTDOA method relies on a double time difference of data arrival without time synchronization of various nodes of the system. The Kalman filtering is applied to smooth the results for static node location as well as to predict a mobile node trajectory. The...
In this paper we present methods enabling the analysis and detection of the Universal Mobile Telecommunications System (UMTS) signals. Presented procedures enable estimation of the basic parameters of the signal, identification of the standard and provide knowledge concerning essential information about the transmitted signal. Efficiency tests of proposed method of analysis are also introduced in...
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