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Petri net is a powerful modelling and analysis mechanism, which facilitates a smart way to understand events and dynamic systems. This paper provides an analysis of several generations of mobile network systems, namely, UMTS, LTE, GPRS and MANET using Petri net. The detailed analysis shows that these protocols are robust, bounded and deadlock free.
The number of applications using machine-2-machine-(M2M)-communication is rapidly increasing. Whereas, development and installation of systems using standard mobile communication systems is a mere development task, the implementation of battery-powered sensors systems comes with severe challenges, especially, if long operation times in the range of years should be achieved. For these systems, optimization...
Internet protocol (IP) is emerging as a ubiquitous protocol for communications and applications. IP-based services aims to provide consumers anytime-anywhere access to content over range of electronic devices and to integrate services & content, to tie them together. This paper presents an overview of various network architectures and their evolution to include an all IP based infrastructure fuelled...
Universal Mobile Telecommunications System (UMTS), as a core network can support both circuit-switch as well as packet-switch networks. UMTS supports IP Multimedia services by including the IP Multimedia Subsystem (IMS) as part of its core network. IMS services are used by authenticating user equipment with the UMTS using UMTS AKA and then with the IMS using IMS AKA. This paper concentrates on the...
With the development of the third generation wireless communications technology, application fields of GPRS (General Packet Radio Service) are expanding. The data collection and wireless technology form wireless data acquisition and launch systems. It is widely used in water, electricity, gas and other auto-detection systems. In this paper, two parts are included. In hardware design part, wireless...
In this paper we present a study of the performance of handovers for live GPRS, UMTS and HSDPA networks from the point of view of data traffic. Specifically, our analysis focuses on an evaluation of the impact of handover at IP level during data connections (packet losses, jitter and outage duration). The results provided in this paper have been obtained from extensive field tests carried out on European...
Most traditional alarm systems cannot address security threats in a satisfactory manner. To alleviate this problem, we developed a high-confidence cyber-physical alarm system (CPAS), a new kind of alarm systems. This system establishes the connection of the Internet (i.e. TCP/IP) through GPRS/CDMA/3G. It achieves mutual communication control among terminal equipments, human machine interfaces and...
We present a scheme for flow management with heterogeneous access technologies available indoors and in a campus network such as GPRS, 3G and Wi-Fi. Statistical learning is used as a key for optimizing a target variable namely video quality of experience (QoE). First we analyze the data using passive measurements to determine relationships between parameters and their impact on the main performance...
Present 3G Mobile Devices are often supports multiple communication technologies. If software developers want to control the configuration or monitor the characteristics of active Radio Access Technologies (RATs), their mobile applications will have to use different programming interfaces for each technology on various supported platform. We propose Modular Data Link Layer M-DALL for a NEXT GEN Mobile...
In China traditional methods of building Modbus remote monitoring system have some drawbacks. They are tightly dependent on telephone lines if wired communication was used; transferring speed is limited when using wireless technology like GPRS; Proprietary interfaces make it hard to reuse software design and new information island may be formed. So a new architecture for Modbus remote monitoring application...
This paper describes the portable satellite backhauling solution for emergency communications used in the e-Triage Project. The main objective of e-Triage is the efficient electronic on-site registration of the victims in Mass Casualty Incidents (MCIs) to enable a fast distribution of the information to hospitals for a better handling of victims. To achieve this, e-Triage designs the end device used...
Nowadays, users of mobile phones generate too many files that have to be frequently downloaded to an external storage repository (freeing local space), using a USB cable or a short-range wireless connection such as Bluetooth. This situation is very common in developing countries where there are not many available wireless networks, restricting the user mobility. This paper presents an Internet File...
We propose a polar transmitter architecture that is robust to modulation-induced injection pulling of its RF oscillator by means of a built-in self compensation. A mathematical model is presented for the injection pulling mechanism, which incorporates a digitally-controlled delay circuit that minimizes injection pulling by adjusting the overall phase shift in the parasitic path between the final amplitude...
In the idea to create a realistic model of mobility and traffic for the networks of 3rd and 4th generation, we have studied many techniques of modeling and planning. Our choice was for the real network traces exploitation techniques, mainly because compared to other techniques this technique is very adapted to the real modeling. Although this technique is most convenient, it has many disadvantages...
For more and more data services in GPRS networks, through analysis of both the GPRS network structure and the data features of Gb port, introducing into the analysis flow of multi-level, analysis and research the network data from the bottom-up.
Many equipment manufactures introduce proprietary protocols in network monitoring and equipment configuration to maintain market monopoly. This paper presenting a low cost solution to access, monitor and configure such equipments irrespective of its communication method. The solution consists of especially designed hardware modules which are collocated and connected with the equipments (need to monitor...
The construction of portable HSDPA USB dongle is studied. Of course, data service such as GPRS and EDGE are also supported. In the multi-mode operation of GPRS & EDGE exit GSM850, EGSM, GSM1800 and GSM1900. For WCDMA & HSDPA, Band I, II, and V are treated in our dongle. So, the dongle must fulfill the requirements for multi-mode and multi-band services. The power regulator with LDO is indicated...
The traditional remote data collection has the shortcomings such as the cover scope is small and the corresponding is unreliable, and the wireless network communication has better timeless and does not have the space limitation. The remote data collection and supervisory system based on GPRS/3G (General Packet Radio Service/The 3rd generation communication) network is discussed and designed in the...
Next generation wireless networks are foreseen to be heterogeneous in nature.Wireless networks consisting of different access technologies with different bandwidth and coverage area will coexist to provide roaming users with their requirements. Handoff among heterogeneous networks, i.e. vertical handoff (VHO), has attracted enormous attention from researchers over the last couple of years. Absence...
Since peer-to-peer (P2P) systems are dominating in Internet traffic, there were several attempts to implement it in mobile wireless networks, in particular in GSM/GPRS and UMTS networks. In this work basic and hidden problems which prevent it from successful implementation are studied as well as some proposals and improvements are presented. Mainly this work is focused on specific features of mobile...
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