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This paper introduces the key aspects of a new channel model based upon the Wireless World Initiative New Radio (WINNER)+ channel model for wireless channels in heterogeneous scenarios (e.g. indoor, outdoor and satellite scenarios). It consists of a collection of features created in the extended spatial channel model (SCME) and WINNER projects along with novel modeling approaches. The quasi deterministic...
Bluetooth, which offers users the mobility to convenient, low-cost, short-ranged connections with up to seven other Bluetooth-enabled devices, has been widely adopted especially by young adults. However, Bluetooth-enabled networks have similar security weaknesses as any other digital networks. Instilling security awareness and implementing preventive measures, responsibilities of both the device manufacturers...
This paper presents a cooperative localization approach for mobile nodes using wireless and ranging devices. We consider scenarios where node mobility follows stop-and-go behavior; we can then utilize the different movement states of nodes as an input to our localization approach. In the proposed method, each node autonomously finds among its surrounding nodes the ones that do not seem to move, and...
In wireless sensor networks, sensor nodes will transmit the sensing data to sink through multi-hop, this kind of transmission will cause the hotspot problem, and also the effectiveness of sensing data will be decreased in larger network environment. To solve all these problems, we propose an instantaneous data dissemination mechanism which can use multiple mobile sinks to collect the sensing data...
The advances in electronics allow the integration and design of new medical technologies, lots of them used for patient monitoring in order to improve medical diagnoses looking for a better quality of life. In this paper the design of a holter is described using the Bluetooth technology as its wireless communication, the prototype is developed considering battery operation and that the system could...
Cognitive Radio (CR) is a key technology for improving the utilization level of the overall radio spectrum in wireless communications. It is able to sense and change its transmission and reception parameters adaptively according to spectrum availability in different spectrum channels. The Cognition Cycle (CC) is a state machine that is embodied in each CR host that defines the mechanisms related to...
A Tactical Information Communication Network (TICN) enables communication among military entities during warfare. In a TICN, base stations (BSs) are required to move along with mobile devices in order to provide the communication wherever they are. This type of BS is referred to as Mobile Base Station (MBS). The backhaual of an MBS is composed of a wireless communication link so that the performance...
Wireless Relay networks have become very important technologies in the future wireless systems. Current research works mostly focus on scenarios where relay stations are either stationary or mobile with uniform velocity. However, in many applications, relay stations are mobile with irregular patterns. In particular, when mobile relay stations (MRSs) are deployed to complement the cellular systems,...
In wireless communication, the discovery of the surrounding access points is crucial to provide seamless connectivity to mobile users. In IEEE 802.11, this discovery process is performed by passive and active scanning functions. For both, timers are usually constant (within the 802.11 driver) and their configuration affects the two main scanning performance metrics, i.e., scanning latency and scanning...
An architecture for wireless communication between control centers and registered users in emergency situations when the cellular network is not operational is described. It is based on delay tolerant networks (DTN) and enables mobile users with multiple radio interface technologies to communicate across heterogeneous network technologies. With the help of asynchronous bundles passing from hop to...
Multi-channel wireless radio operations, Wireless Access in Vehicular Environments (WAVE) mode, medium access control (MAC), and physical layers (PHYs), including the operation of control channel (CCH) and service channel (SCH) interval timers, parameters for priority access, channel switching and routing, management services, and primitives designed for multi-channel operations are described in this...
IP reconfiguration using DHCP is the usual approach followed by mobile nodes (MNs) when they roam from one network to another one. However, DHCP is too slow for cooping with fast handover requirements. This article describes a cross-layer approach for accelerating DHCP-based IP reconfigurations in a mobility scenario across 802.11 access points (APs). DHCP transactions are initiated by neighboring...
Mobile technology has opened up new chances to create organizational communication and customer value. The consumer-sided adoption of mobile technology and services not only increased interest among practitioners, but also among researchers of different disciplines. To analyze antecedents of mobile technology adoption and usage intention prior studies mainly applied the Technology Acceptance Model...
Quality of Service (QoS) of video streaming service over wireless and mobile network is determined by many intermingled factors. Some of the factors can be adjusted. Video resolution, audio rate, and bandwidth are among of them. Other factors are not fully controllable such as network throughput, delay, and packet lost probability. In order to increase user satisfaction, efforts to make better quality...
In this paper performance modeling for a mobile stations operating according to CSMA/CA with binary exponential back-off (BEB) is discussed. Unlike the previous studies we concentrate on delay and loss performance metrics experienced by individual stations. To obtain delay distribution of an arbitrary packet we use Geo(i)/G(i)/1/K queuing system representing the number of stations having a frame for...
Vehicle intelligent terminal system for engineering equipment could realize condition monitoring, fault diagnosis, time based maintenance intelligent management and long-distance operation management synthetically. Adopting computer technique, sensor technique, fault diagnosis technique and wireless communication technique, vehicle intelligent terminal system for engineering equipment is researched...
With mobile commerce technology continuously being taken more into use and introduced in new markets, the transition to mobile commerce (m-commerce) will make mobile shopping exceedingly popular. In the near future mobile shopping will probably replace today's markets or shopping complex. This project presents a mobile application which is built using Mobile Information Device Profile (MIDP) of the...
In a wireless domain where a mobile user accesses heterogeneous wireless technologies with multiple interfaces, a multi-path scheduling algorithm can benefit mobile users' experience by aggregating different network bandwidth together. However, existing literature actually shows that for TCP flows, it may not be the case. To better exploit multi-path scheduling for TCP connections, this paper presents...
Recently Intra Vehicle Communication received great interest from the automotive industry and Ultra Wideband (UWB) technology considered as one of the potential candidate for this system. Goal of this paper is to compare UWB pulse modulation schemes like time hopping pulse position modulation (TH-PPM), direct sequence pulse amplitude modulation (DS-PAM) and multi-band orthogonal frequency division...
This paper discusses a joining method of the mobile nodes in PANs. The mobile nodes repeat frequently a joining association at the boundary points. A joining method using hysteresis features in PANs is proposed for solving the problem. For performance analysis, the joining period of the mobile nodes in PANs is investigated and analyzed using the proposed method.
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