Protocols for Ubiquitous Mobile Web Services
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This document summarizes research on protocols for ubiquitous mobile web services being conducted by Fahad Aijaz at the Chair of Communication Networks (ComNets). It outlines pre-existing work, compares ComNets' research to Nokia's efforts, provides a history and roadmap of ComNets' research from 2003-2006, discusses a vision for ubiquitous mobile web services, and proposes future research areas from 2007 onwards including asynchronous mobile web services and using mobile web services for telematics applications.
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Selected certificates
Fahad Aijaz has completed several training courses as evidenced by three certificates of achievement. The certificates are for successfully completing a QA training course in September 2015, transitioning into management in February 2013, and a four-day machine to machine training in June 2015 covering topics such as applications, standardization, and security.
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Optimal Content Downloading in Vehicular Network with Density Measurement
The existence of Internet-connected navigation and infotainment systems is becoming a truth that will
easily lead to a remarkable growth in bandwidth demand by in-vehicle users. In Examples the applications
of vehicular communication proliferate, and range from the updating of road maps to the repossession of
nearby points of interest, downloading of touristic information and multimedia files. This content
downloading system will induce the vehicular user to use the resource to the same extent as today’s mobile
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different contents from Internet-based servers. We summarize the performance limits of such a vehicular
multimedia content downloading system by modeling the content downloading process as an effective
problem and developing the overall system throughput with density measurement. Results highlight the
methods where the Roadside infrastructure i.e., access points are working at different capabilities
irrespective of vehicle density, the vehicle-to-vehicle communication.
Study of vanet routing protocols for end to end delay
Less than a century since the automobile was made affordable enough for the general
public, hundreds of millions of vehicles now travel along highways and streets around the
world. Innovations in safety, comfort, and convenience have made vast improvements in
automobiles during that time, and now new technologies promise to change the face of
vehicular travel once again. Vehicular ad hoc network (VANET) is network which provides the
communication between vehicle to vehicle for p r o v i d i n g i n f o rma t i o n t o travelers with
new features and applications that have never previously been possible. This paper focuses
on vehicle to vehicle (V2V) communications in VANET. Lot of research is going on for
determining route between source and destination vehicles for routing the information with
good packet delivery ratio. In this paper we provide a simulation and study of VANET Routing
Protocols for end-to-end delay in V2V communication.
STUDY OF VANET ROUTING PROTOCOLS FOR END TO END DELAY
Less than a century since the automobile was made affordable enough for the general public, hundreds of millions of vehicles now travel along highways and streets around the
world. Innovations in safety, comfort, and convenience have made vast improvements in
automobiles during that time, and now new technologies promise to change the face of
vehicular travel once again. Vehicular ad hoc network (VANET) is network which provides the communication between vehicle to vehicle for p r o v i d i n g i n f o r m a t i o n t o travelers with new features and applications that have never previously been possible. This paper focuses
on vehicle to vehicle (V2V) communications in VANET. Lot of research is going on for
determining route between source and destination vehicles for routing the information with
good packet delivery ratio. In this paper we provide a simulation and study of VANET Routing Protocols for end-to-end delay in V2V communication.
Performance and handoff evaluation of heterogeneous wireless networks 2
This document discusses performance evaluations of heterogeneous wireless networks (HWNs) using the OPNET simulator. It implemented WLAN, WiMAX, and UMTS networks with applications like FTP, video conferencing, and VoIP. Handoff management between the networks was also evaluated. Simulation results showed WiMAX throughput was over 30% higher than WLAN and UMTS. Vertical handoff between WLAN-WiMAX and WLAN-UMTS was difficult without carefully engineering the WLAN network due to differences between the networks. Key metrics like delay, throughput, and received traffic were analyzed and WiMAX generally had superior performance.
SIP-Based Mobility Management for LTE-WiMAX-WLAN Interworking Using IMS Archi...
In this paper, we propose an architecture framework for interworking of Long Term Evolution (LTE), Worldwide Interoperability for Microwave Access (WiMAX) and Wireless Local Area Network (WLAN) technologies. The aim is to offer users of various networks seamless high quality IP-based multimedia services access anywhere at any time. IP Multimedia Subsystem (IMS) is used in the proposed architecture for providing a platform through which telecommunications operators can merge the various networks. A Session Initiation Protocol (SIP) REFER method which provides uninterrupted service continuity is introduced. The proposed LTE-WiMAX and LTE-WLAN tight coupled interworking is compared with the UMTS- WiMAX and UMTS-WLAN tight coupled interworking. The two heterogeneous networks are simulated using OPNET Modeler 17.1. Various metrics are obtained to test the performance of the proposed technique. Results show that successful VoIP session handoffs with acceptable Quality of Services (QoS) levels can be performed. Results also show that the proposed architecture outperforms the pervious architecture.
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The existence of Internet-connected navigation and infotainment systems is becoming a truth that will easily lead to a remarkable growth in bandwidth demand by in-vehicle users. In Examples the applications of vehicular communication proliferate, and range from the updating of road maps to the repossession of nearby points of interest, downloading of touristic information and multimedia files. This content downloading system will induce the vehicular user to use the resource to the same extent as today’s mobile customers. By this approach communication-enabled vehicles are paying attention in downloading different contents from Internet-based servers. We summarize the performance limits of such a vehicular multimedia content downloading system by modeling the content downloading process as an effective problem and developing the overall system throughput with density measurement. Results highlight the methods where the Roadside infrastructure i.e., access points are working at different capabilities irrespective of vehicle density, the vehicle-to-vehicle communication.
capitulos 6
This document discusses deploying wireless sensor devices in intelligent transportation system applications. It describes how wireless sensor networks can deliver a connected environment where vehicles, infrastructure, and people can interact. The document also examines different communication technologies that could be used for vehicle-to-vehicle and vehicle-to-infrastructure connections, including ZigBee, Bluetooth, Wi-Fi, Ultra Wide Band, and CALM. It argues that ZigBee is well-suited for connecting wireless sensor devices to vehicles and infrastructure due to its low cost and power capabilities.
8 of the Must-Read Network & Data Communication Articles Published this weeke...
Beamforming for millimetre-wave (mmWave) frequencies has been studied for many years. It is considered as an important enabling technology for communications in these high-frequency ranges and it received a lot of attention in the research community. The special characteristics of the mmWave band made the beamforming problem a challenging one because it depends on many environmental and operational factors. These challenges made any model-based architecture fit only special applications, working scenarios, and specific environment geometry. All these reasons increased the need for more general machine learning based beamforming systems that can work in different environments and conditions. This increased the need for an extended adjustable dataset that can serve as a tool for any machine learning technique to build an efficient beamforming architecture. Deep MIMO dataset has been used in many architectures and designs and has proved its benefits and flexibility to fit in many cases. In this paper, we study the extension of collaborative beamforming that includes many cooperating base stations by studying the impact of User Equipment (UE) speed ranges on the beamforming performance, optimizing the parameters of the neural network architecture of the beamforming design, and suggesting the optimal design that gives the best performance for as a small dataset as possible. Suggested architecture can achieve the same performance achieved before with up to 33% reduction in the dataset size used to train the system which provides a huge reduction in the data collection and processing time.
Influence of various application types on the performance of LTE mobile networks
This document presents a mathematical model for analyzing the performance of LTE mobile networks using queuing theory. It considers the influence of different application types on network performance. The model represents user traffic as sporadic sources feeding into the queue of an eNodeB node. It assumes exponential service times. Analytical expressions are derived for performance metrics like mean packet delay and blocking probability. Simulation results using the NS3 simulator validate the model under various burstiness scenarios representing different applications. The results show that application type has a significant impact on packet delay and blocking probability, with highly variable traffic (long tails) performing worse than exponentially distributed traffic.
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More from Dr. Fahad Aijaz
Selected certificates
Fahad Aijaz has completed several training courses as evidenced by three certificates of achievement. The certificates are for successfully completing a QA training course in September 2015, transitioning into management in February 2013, and a four-day machine to machine training in June 2015 covering topics such as applications, standardization, and security.
Protecting Multi-Interfaced Mobile Web Services using Agreements
The document summarizes a talk on protecting multi-interfaced mobile web services using service level agreements (SLAs). It discusses the evolution of mobile web server architectures, including adding asynchronous and RESTful access. It then describes a framework for negotiating and monitoring SLAs using four phases: agreement creation, evaluation, monitoring, and disposal. Performance tests showed RESTful access improved latency and server capacity compared to SOAP.
Mobile Web Services in Health Care and Sensor Networks
The document summarizes a presentation on mobile web services in health care and sensor networks. It discusses using mobile web services with wireless sensor networks for applications like health monitoring. It presents an advanced mobile web services architecture that supports both synchronous and asynchronous interactions. It also describes using sensor networks in a healthcare scenario and future research on peer-to-peer service level agreements and integrating sensor networks with the IP Multimedia Subsystem.
Asynchronous Mobile Web Services:
The document describes an asynchronous middleware for developing and deploying asynchronous mobile web services. It proposes a framework that provides APIs to facilitate asynchronous communication and reduce development costs. The framework supports polling and callback interactions, and provides mechanisms for service creation, control, monitoring and dynamic management. It presents proof-of-concept evaluation using a sensor network application and discusses performance results and future work.
Mobile Web Services for Distributed In-Network Communications and Computations
1) The document proposes a scientific framework that introduces mobile web services-based collector nodes to perform distributed in-network computations for wireless sensor networks (WSNs).
2) Network computations in wireless networks present a scientific challenge compared to fixed networks. The collaboration between collector nodes can produce higher-valued mobile web services.
3) The research aims to contribute to the state-of-the-art network computation theory of WSNs in the long run by focusing on real-world problems and developing solutions, with the potential to support the UMIC RA B1 project concerning wireless communications in infrastructure-less environments.
Implementation and Performance Analysis of a UDP Binding for SOAP
This document summarizes a master's thesis presentation on implementing and analyzing the performance of a UDP binding for SOAP. The presentation covered motivation for using UDP instead of TCP for SOAP in mobile networks due to TCP's inefficiencies. It proposed a UDP binding for SOAP with reliability mechanisms. Performance analysis showed the reliable UDP binding had average response times 20-25% faster than HTTP. The thesis was that SOAP over reliable UDP can substitute the SOAP/HTTP binding in mobile networks for better performance.
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