Bibliographies thématiques / General packet radio service network

Littérature scientifique sur le sujet « General packet radio service network »

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Publié le 10 mars 2023

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Articles de revues sur le sujet "General packet radio service network"

Chen, Yong, et Wen Li Zhou. « User Behavior Analysis Based on Gn Interface of GPRS Network ». Advanced Materials Research 765-767 (septembre 2013) : 1205–9. http://dx.doi.org/10.4028/www.scientific.net/amr.765-767.1205.

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The General Packet Radio Service (GPRS) has become a standard to extend the services provided by the Global System for Mobile Communications (GSM). Through the introduction of packet switching technology, GPRS supports the use of packet data transmission, allowing a more efficient usage of the radio resources with a consequent improvement in the quality of service of subscribers. This paper presents some observations of the real operational GPRS network in a certain city by analyzing the characteristics of the data which was captured by monitoring system deployed in the Gn interface of GPRS core network. The distributions of the activated users and on-offline users were analyzed in this paper, as well as the online duration characteristic of mobile users. At last, the distribution of users and sessions was discussed, and finally some valuable conclusions were concluded for the mobile network operators.

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Radhi, Ahmed A. « Design and Implementation of Healthcare Patient based General Packet Radio Service ». Webology 17, n^o 2 (21 décembre 2020) : 848–61. http://dx.doi.org/10.14704/web/v17i2/web17071.

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In recent years the health monitor systems for patients was developed by using wireless technologies such as Internet of Things (IoT), Wireless Sensor Network (WSN), or Websites. In this research a patient's position in Google map, heartbeat rate, and temperature were measured and transmitted to the family or doctor based GPRS technology via the smartphone and microcontroller. This system has advantages of low cost design, Early warning of patient status through SMS message or email, position recognize based on GPS and fast of treatment patient.

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Dorogov, A. Yu, et A. I. Yashin. « SOFTWARE PACKAGE FOR MODELING HF-BAND PACKET RADIO NETWORKS ». H&ES Research 12, n^o 6 (2020) : 26–37. http://dx.doi.org/10.36724/2409-5419-2020-12-6-26-37.

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It is noted that the complexity and constant variability of the ionosphere structure, the presence of many factors affecting the propagation of radio waves in such an environment, as well as the complex topology of communication networks lead to the need the computer modeling of data transmission in HF-band networks. The existing models of representation of ionospheric processes and digital radio channels are described. It is shown that to solve the problems of designing a radio data transmission network, complex modeling is necessary, taking into account the network topology, signal propagation losses in the radio channel, noise level, type of digital modulation, and radio forecast of communication conditions. In this paper, we consider a modeling complex for packet radio networks of HF-band data transmission with changing communication conditions. The complex consists of a set of interacting models implemented in the Matlab software environment. The software model for predicting communication conditions complies with ITU-R recommendation P. 533–13 of the International Telecommunication Union (ITU). The description of the model for the "Point-to-point" and "Area" modes is given and the results of its application for calculating extended radio lines are shown. The initial data and system parameters of the model are described. A model of the HF-band digital radio channel is presented. The communications System Toolbox package, which is part of the Matlab software environment, is used for this modeling. The model's input and output data are described. A model of Ionospheric Wave Frequency Dispatcher service of the radio network has been developed. This model is intended for building a wave schedule for stable operation of HF radio lines in the network. The rules for building a two-frequency and multi-frequency wave schedule are described. A scheme for modeling the operation of a packet radio network under changing communication conditions is proposed. The complex allows you to evaluate the probabilistic and temporal characteristics of radio lines and zonal radio coverage depending on geographical coordinates, time, month, solar activity and selected system parameters for a period of up to one year. Examples of using the modeling complex are given. The purpose of this work is to formulate the problem of simulation of HF radio networks under changing communication conditions.

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Lin, Yi-Bing, Herman C. H. Rao et Imrich Chlamtac. « General Packet Radio Service (GPRS) : architecture, interfaces, and deployment ». Wireless Communications and Mobile Computing 1, n^o 1 (janvier 2001) : 77–92. http://dx.doi.org/10.1002/1530-8677(200101/03)1:1<77 ::aid-wcm7>3.0.co;2-n.

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N. Sirhan, Najem, et Manel Martinez-Ramon. « QoS-based Packet Scheduling Algorithms for Heterogeneous LTE-Advanced Networks : Concepts and a Literature Survey ». International Journal of Wireless & ; Mobile Networks 14, n^o 4 (31 août 2022) : 1–18. http://dx.doi.org/10.5121/ijwmn.2022.14401.

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The number of LTE (Long-Term Evolution) users and their applications has increased significantly in the last decade, which increased the demand on the mobile network. LTE-Advanced (LTE-A) comes with many features that can support this increasing demand. LTE-A supports Heterogeneous Networks (HetNets) deployment, in which it consists of a mix of macro-cells, remote radio heads, and low power nodes such as Pico-cells, and Femto-cells. Embedding this mix of base-stations in a macro-cellular network allows for achieving significant gains in coverage, throughput and system capacity compared to the use of macrocells only. These base-stations can operate on the same wireless channel as the macro-cellular network, which will provide higher spatial reuse via cell splitting. Also, it allows network operators to support higher data traffic by offloading it to smaller cells, such as Femto-cells. Hence, it enables network operators to provide their growing number of users with the required Quality of Service (QoS) that meets with their service demands. In-order for the network operators to make the best out of the heterogeneous LTE-A network, they need to use QoS-based packet scheduling algorithms that can efficiently manage the spectrum resources in the HetNets deployment. In this paper, we survey Quality of Service (QoS) based packet scheduling algorithms that were proposed in the literature for the use of packet scheduling in Heterogeneous LTE-A Networks. We start by explaining the concepts of QoS in LTE, heterogeneous LTE-A networks, and how traffic is classified within a packet scheduling architecture for heterogeneous LTE-A networks. Then, by summarising the proposed QoS-based packet scheduling algorithms in the literature for Heterogeneous LTE-A Networks, and for Femtocells LTE-A Networks. And finally, we provide some concluding remarks in the last section.

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Vetoshko, Ivan, et Vyacheslav Noskov. « EVALUATION OF VOICE TRANSMISSION QUALITY IN THE LTE NETWORKS ». Information and Telecommunication Sciences, n^o 2 (21 décembre 2021) : 22–26. http://dx.doi.org/10.20535/2411-2976.22021.22-26.

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Background. LTE mobile networks combine packet network technology and radio technology. Parameters of packet and radio subsystems significantly affects the quality of all traffic types transmission, especially telephone traffic, as the most demanding to such parameters of network transmission as delay, jitter and packet loss rate. The recommendations of the International Telecommunication Union and the documents of the partner organization of telecommunications operators (3GPP) contain hypothetical reference models, targets for end-to-end connection quality, and lists the factors that affect the quality (QoS) of VoLTE services. In addition, the network points are shown where you need to measure the quality of telephone traffic and tools for quality assessment. The quality of telephony services is assessed according to the E-model using the method of determining the mean opinion score (MOS). However, this technique is intended primarily to determine the MOS during the network planning. To calculate the MOS in a working network, you have to measure such network performance first such as voice delay and packet loss rate. This article presents the method of calculating MOS in the LTE network based on the E-model and presents the results of practical quality studies. Objective. The purpose of this article is research the impact of delay and packet loss ratio and voice codec characteristics in the real LTE network on quality of telephone services. Methods. Analysis of factors affecting on telephone services quality and analysis MOS assessment methods. Practical studies of the delay and packet loss ratio affect the MOS level in various conditions of radio coverage and network load. Results. Practical results of delay and packet loss ratio influence on the telephone services quality in the LTE network. Calculated MOS based on the practically measured delay and packet loss ratio. Conclusions. The combination of packet technologies, modern AMR-WB codecs and QoS support mechanisms in the LTE networks provides high quality perception of voice messages at the level of not less than 4 on the MOS scale. With a delay not exceeding 180 ms, a sufficiently high quality of voice transmission is ensured (MOS ≈ 4). VoLTE technology using the AMR-WB codec is quite resistant to packet loss and provides high quality perception of voice messages at a packet loss ratio of up to 1%.

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Iswahyudi, C., M. A. Novianta, Muchlis et H. P. Suseno. « Application of Greenhouse Gas Monitoring System Using General Packet Radio Service on GSM Network ». IOP Conference Series : Materials Science and Engineering 807 (23 avril 2020) : 012013. http://dx.doi.org/10.1088/1757-899x/807/1/012013.

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Gadde, Nagaraja, Basavaraj Jakkali, Ramesh Babu Halasinanagenahalli Siddamallaih et Gowrishankar Gowrishankar. « Quality of experience aware network selection model for service provisioning in heterogeneous network ». International Journal of Electrical and Computer Engineering (IJECE) 12, n^o 2 (1 avril 2022) : 1839. http://dx.doi.org/10.11591/ijece.v12i2.pp1839-1848.

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Heterogeneous wireless networks (HWNs) are capable of integrating the different radio access technologies that make it possible to connect mobile users based on the performance parameters. Further quality of service (QoS) is one of the major topics for HWNs, moreover existing radio access technology (RAT) methodology are designed to provide network QoS criteria. However, limited work has been carried out for the RAT selection mechanism considering user QoS preference and existing models are developed based on the multi-mode terminal under a given minimal density network. For overcoming research issues this paper present quality of experience (QoE) RAT (QOE-RAT) selection methodology, incorporating both network performance criteria and user preference considering multiple call and multi-mode HWNs environment. First, this paper presents fuzzy preference aware weight (FPAW) and multi-mode terminal preference aware TOPSIS (MMTPA-TOPSIS) for choosing the best RAT for gaining multi-services. Experiment outcomes show the QOE-RAT selection method achieves much superior packet transmission outcomes when compared with state-of-art Rat selection methodologies.

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Klinkowski, Mirosław. « Latency-Aware DU/CU Placement in Convergent Packet-Based 5G Fronthaul Transport Networks ». Applied Sciences 10, n^o 21 (22 octobre 2020) : 7429. http://dx.doi.org/10.3390/app10217429.

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The 5th generation mobile networks (5G) based on virtualized and centralized radio access networks will require cost-effective and flexible solutions for satisfying high-throughput and latency requirements. The next generation fronthaul interface (NGFI) architecture is one of the main candidates to achieve it. In the NGFI architecture, baseband processing is split and performed in radio (RU), distributed (DU), and central (CU) units. The mentioned entities are virtualized and performed on general-purpose processors forming a processing pool (PP) facility. Given that the location of PPs may be spread over the network and the PPs have limited capacity, it leads to the optimization problem concerning the placement of DUs and CUs. In the NGFI network scenario, the radio data between the RU, DU, CU, and a data center (DC)—in which the traffic is aggregated—are transmitted in the form of packets over a convergent packet-switched network. Because the packet transmission is nondeterministic, special attention should be put on ensuring the appropriate quality of service (QoS) levels for the latency-sensitive traffic flows. In this paper, we address the latency-aware DU and CU placement (LDCP) problem in NGFI. LDCP concerns the placement of DU/CU entities in PP nodes for a given set of demands assuming the QoS requirements of traffic flows that are related to their latency. To this end, we make use of mixed integer linear programming (MILP) in order to formulate the LDCP optimization problem and to solve it. To assure that the latency requirements are satisfied, we apply a reliable latency model, which is included in the MILP model as a set of constraints. To assess the effectiveness of the MILP method and analyze the network performance, we run a broad set of experiments in different network scenarios.

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Prijono, Wahyu Adi. « PENGGUNAAN METODE KOMPRESI TEKS UNTUK LAYANAN SMS OVER GPRS ». SISTEM Jurnal Ilmu Ilmu Teknik 15, n^o 3 (4 décembre 2019) : 23–35. http://dx.doi.org/10.37303/sistem.v15i3.197.

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The increasing number of short message service which has grown rapidly has bad impact towards its service quality. Delay in the system could increase while message delivered because the network gets burdened. Aplication Comresion text metode ( iD-Code companding algorithm) for predictive text has mode to reduce bits representation for each character. In the other hand by choosing new route like General Packet Radio Service (GPRS) will also significantly help to reduced burden of the network and also may achieve high rate of message delivery process. Based on analysis obtained that iD-Code Algorithm could truncates bit representation of predictive text file until 50% of value, with character average length only 4 bits. The implementation of iD-Code Algorithm also lead to the decreasing of packet holding time that also have impact reducing the packet delay time queue and further it will lead to the channel using efficiency.

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Thèses sur le sujet "General packet radio service network"

Fabri, S. N. « Multimedia communications over mobile packet networks ». Thesis, University of Surrey, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343461.

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This thesis describes several concepts associated with the transmission of multimedia services over mobile radio access networks. The error performance and traffic requirements of real-time video transmission over the General Packet Radio Services (GPRS) access network and its successor Enhanced-GPRS is examined. In view of this. video error resilience techniques which exploit channel prioritisation mechanisms are introduced with a view to increasing the robustness of received video sequences encoded with MPEG-4 to channel errors. These include stream prioritisation using unequal error protection and region-of-interest prioritisation for use in multiparty communications and streaming applications. A new forward-error correction scheme for EGPRS which uses iterative serially-concatenated convolutional-Reed Solomon codes is designed and is shown to significantly enhance the error performance for real-time services. A study of (he use of backward error correction mechanisms when transmitting streaming multimedia services is carried out, and a new retransmission scheme is introduced to increase the capacity of the radio access network when supporting streaming services

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Fahlborg, Daniel. « Measuring one-way Packet Delay in a Radio Network ». Thesis, Linköpings universitet, Kommunikationssystem, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-148586.

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Radio networks are expanding, becoming more advanced, and pushing the limits of what is possible. Services utilizing the radio networks are also being developed in order to provide new functionality to end-users worldwide. When discussing 5G radio networks, concepts such as driverless vehicles, drones and near zero communication delay are recurrent. However, measures of delay are needed in order to verify that such services can be provided -- and measuring this is an extensive task. Ericsson has developed a platform for simulating a radio environment surrounding a radio base station. Using this simulator, this project involved measuring one-way packet delay in a radio network, and performing a Quality of Service evaluation of a radio network with a number of network applications in concern. Application data corresponding to video streams, or Voice over IP conversations, were simulated and packet delay measurements were used to calculate and evaluate the Quality of Service provided by a radio network. One of the main conclusions of this project was that packet delay variations are asymmetric in uplink, which suggests usage of non-conventional jitter measurement techniques.

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Bingxin, Yi, Zhang Qishan et Ding Shengxi. « INTELLIGENT VEHICLE NAVIGATION SYSTEM CONNECTED WITH INTERNET ». International Foundation for Telemetering, 2003. http://hdl.handle.net/10150/606700.

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International Telemetering Conference Proceedings / October 20-23, 2003 / Riviera Hotel and Convention Center, Las Vegas, Nevada
The intelligent vehicle navigation system is a multifunctional and complex integrated system that uses autonomous vehicle navigation, geography information, database system, computer technology, multimedia technology and wireless communication. In this paper, an autonomous navigation system based on embedded hardware and embedded operation system that is Linux is proposed. The system has advantages of low cost, small mass, multifunction and high stability, especially connecting with Internet.

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Nordström, Edward, et Johan Hollander. « Design och implementering av enhandsburen RFID-läsare ». Thesis, Jönköping University, JTH, Computer and Electrical Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-6752.

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Radio frequency identification (RFID) is a versatile wireless technology usedworldwide. The fields of applications are many and its popularity constantlygrows due to smaller in size, better and less expensive components. RFID isused to identify, track or share information about an object using radio waves.

This master thesis describes the process of designing and implementing ahandheld UHF RFID reader. The goal was to, based on a UHF RFID-chipdesign a fully functional, small in size and power efficient device. Amicrocontroller provides the user interface and is also used to control theRFID-chip and a Bluetooth device. A Bluetooth- and GPRS-compatible mobilephone will be used to forward data to a server connected to the Internet. Allparts of the design are described, such as the printed circuit board design aswell as the software for the micro controller and the mobile phone.

Because the extent of this thesis it is neither possible nor necessary to dig toodeep into the Bluetooth- or GPRS-protocol. The focus will be on designingsoftware and hardware for the handheld unit.

Radio frekvens identifiering (RFID) är en mångsidig trådlös teknik somanvänds över hela världen. Områdena där tekniken används är många och dess popularitet växer konstant tack vare mindre storlek, bättre och billigarekomponenter. RFID används för att identifiera, spåra eller dela med siginformation om ett objekt med radiovågor.

Det här examensarbetet beskriver processen av design och implementering aven handburen UHF RFID läsare. Målet har varit att, baserat på ett UHF-RFIDchip, designa en fullt fungerande, liten och strömsnål enhet. En microcontroller förser dels användaren med ett användargränssnitt och sköter delskommunikationen med RFID chip och en blåtandsmodul. En blåtands- ochGPRS- eller 3G-kompatibel mobiltelefon används for att skicka vidare data tillen server kopplad till Internet. Alla delar av designen är beskrivna, så som PCB design, mjukvara för micro controllern och mobiltelefonen.

På grund av omfattningen av det här examensarbetet så har det inte varitmöjligt eller nödvändigt att gräva för djupt i Blåtands- eller GPRS/3Gprotokollen. Fokus är på att designa hårdvara och mjukvara för den handhållna enheten.

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Martiniano, Alexandre Lopes. « Xarmbee : uma arquitetura de hardware modular multi-rádio para gateways de redes de sensores sem fio ». Universidade Federal do Amazonas, 2010. http://tede.ufam.edu.br/handle/tede/3300.

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Made available in DSpace on 2015-04-22T22:00:52Z (GMT). No. of bitstreams: 1 Dissertacao_Alexandre Lopes.pdf: 2105277 bytes, checksum: 2f8d59afe6f1a33f9fb5978e5f6328a7 (MD5) Previous issue date: 2010-07-01
FAPEAM - Fundação de Amparo à Pesquisa do Estado do Amazonas
This work presents a modular architecture for hardware development and integration of various technologies of wireless communication (Bluetooth, GSM / GPRS and ZigBee) in a gateway for Wireless Sensor Networks (WSNs). Thus, the proposal seeks to address an issue not widely explored in a practical way that is the local and remote collection of data from geographically distributed networks. The objective of this research is to focus on practical technological aspects that allow the integration of different technologies in a practical and real hardware platform. The proposed architecture includes power management and selection of several technologies for wireless communication that will be used according to the application. To validate the proposed architecture case study is carried out in order to present the results achieved during the experiments.
Este trabalho apresenta uma arquitetura modular de hardware para viabilização e integração de diversas tecnologias de comunicação sem fio (Bluetooth, GSM/GPRS e ZigBee) em um gateway para Redes de Sensores Sem Fio (RSSFs). Desta forma, a proposta visa solucionar um problema pouco explorado de forma prática, que consiste na coleta presencial e remota de dados de redes geograficamente distribuídas. O objetivo é concentrar essa investigação em aspectos tecnológicos práticos que permitam a integração de diferentes tecnologias em uma solução prática e real. A arquitetura modular proposta contempla o gerenciamento de energia e a seleção da tecnologia de comunicação sem fio que será utilizada de acordo com a aplicação. Para validação da proposta um estudo de caso é realizado com o intuito de apresentar os resultados alcançados durante os experimentos realizados.

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Scarlato, Michele. « Sicurezza di rete, analisi del traffico e monitoraggio ». Master's thesis, Alma Mater Studiorum - Università di Bologna, 2012. http://amslaurea.unibo.it/3223/.

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Il lavoro è stato suddiviso in tre macro-aree. Una prima riguardante un'analisi teorica di come funzionano le intrusioni, di quali software vengono utilizzati per compierle, e di come proteggersi (usando i dispositivi che in termine generico si possono riconoscere come i firewall). Una seconda macro-area che analizza un'intrusione avvenuta dall'esterno verso dei server sensibili di una rete LAN. Questa analisi viene condotta sui file catturati dalle due interfacce di rete configurate in modalità promiscua su una sonda presente nella LAN. Le interfacce sono due per potersi interfacciare a due segmenti di LAN aventi due maschere di sotto-rete differenti. L'attacco viene analizzato mediante vari software. Si può infatti definire una terza parte del lavoro, la parte dove vengono analizzati i file catturati dalle due interfacce con i software che prima si occupano di analizzare i dati di contenuto completo, come Wireshark, poi dei software che si occupano di analizzare i dati di sessione che sono stati trattati con Argus, e infine i dati di tipo statistico che sono stati trattati con Ntop. Il penultimo capitolo, quello prima delle conclusioni, invece tratta l'installazione di Nagios, e la sua configurazione per il monitoraggio attraverso plugin dello spazio di disco rimanente su una macchina agent remota, e sui servizi MySql e DNS. Ovviamente Nagios può essere configurato per monitorare ogni tipo di servizio offerto sulla rete.

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Pandey, Aparna. « End-to-end application behavior in general packet radio service (GPRS) networks ». Thesis, 2000. http://hdl.handle.net/2429/10481.

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This thesis is a part of the joint project undertaken by UBC and Motorola, Richmond. The aim of this thesis was to develop an end-to-end General Packet Radio Service (GPRS) network simulator and to investigate the end-to-end performance behavior at the application level. GPRS is a packet-switched service, which offers packet-data services like support of internet applications over wireless cellular networks. TCP (Transmission Control Protocol) is a widely used transport protocol for internet applications. TCP is a connection-oriented protocol that uses ARQ (Automatic Repeat Request) to ensure reliability. TCP has its own mechanisms for dealing with congestion in the network. However, TCP was not made with wireless networks like GPRS in mind. GPRS has RLC (Radio Link Control) layer, which may work in ACK mode and deal with the errors encountered by the data frames in the wireless medium by the means of ARQ or RLC may operate in UNACK mode and not be responsible for any error-recovery. It is an open question whether the RLC operating in ACK mode with TCP, complements TCP's effort of errorrecovery or is it more desirable for RLC to operate in UNACK mode. It has been shown in literature that for a single Mobile Station in the network, the RLC layer retransmissions (in ACK mode) do counteract the error encountered in the wireless media and TCP adjusts its behavior such that there is no unnecessary retransmission. In this thesis an end-to-end General Packet Radio Service (GPRS) network simulator was modeled using a network simulation tool, OPNET. Some of the issues examined were: • Whether RLC should operate in ACK mode or UNACK mode. • The maximum number of retransmissions at the RLC layer for optimal performance. • The limitation imposed on maximum offered load to optimize the performance. • If TCP allows support of multiple Mobile Stations without unacceptable performance degradation. It was noted that for optimal performance RLC should operate in ACK mode and maximum number of RLC retransmissions can be limited. It was also observed that for best results, the number of users for the same maximum offered load should be reduced and that TCP does not flood the network with unnecessary retransmissions.

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LOLLINI, PAOLO. « On the Modeling and Solution of Complex Systems : From Two Domain-Specific Case-Studies Towards the Definition of a More General Framework ». Doctoral thesis, 2006. http://hdl.handle.net/2158/394303.

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Lindemann, Christoph, et Axel Thümmler. « Performance analysis of the general packet radio service ». 2003. https://ul.qucosa.de/id/qucosa%3A32550.

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This paper presents an efficient and accurate analytical model for the radio interface of the general packet radio service (GPRS) in a GSM network. The model is utilized for investigating how many packet data channels should be allocated for GPRS under a given amount of traffic in order to guarantee appropriate quality of service. The presented model constitutes a continuous-time Markov chain. The Markov model represents the sharing of radio channels by circuit switched GSM connections and packet switched GPRS sessions under a dynamic channel allocation scheme. In contrast to previous work, the Markov model explicitly represents the mobility of users by taking into account arrivals of new GSM and GPRS users as well as handovers from neighboring cells. Furthermore, we take into account TCP flow control for the GPRS data packets. To validate the simplifications necessary for making the Markov model amenable to numerical solution, we provide a comparison of the results of the Markov model with a detailed simulator on the network level.

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Lo, Jaw-Liang, et 羅兆良. « Multiple Traffic Scheduling for Enhaced General Packet Radio Service ». Thesis, 2001. http://ndltd.ncl.edu.tw/handle/64355700688429370546.

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碩士
國立清華大學
資訊工程學系
89
The state-of-the-art cellular networks such as General Packet Radio Service system (GPRS) with Enhanced Data rates for Global Evolution (EDGE) air interfaces can support a wide variety of applications, e.g., web browsing and video conferencing. The desired quality of communication channels, however, for such wireless networks depends on the interferences contributed by the location errors and the signal strength elapsed. To accommodate different Quality-of-Service (QoS) classes for such widely received applications, an efficient scheduling for air interfaces must be essentially supported. In this study, we propose a dynamical scheduling algorithm by together taking the interferences and varying QoS requirements into considerations for GPRS with EDGE air interfaces. Conceptually, the proposed scheme assigns priority orderly to the conversational, streaming, interactive and background traffic classes defined by ETSI. Each channel is equipped with an A-buffer to gather the acknowledge messages of the successfully transmitted packets to measure the utilization of the associated channel. A global monitor device tracks the state of each mobile station. Based on the measured channel utilizations and the states of mobile stations, the proposed scheduling dynamically assigns channels to the ongoing traffics. From the event-driven simulations, the scheme can significantly outperform the scheme without any support of dynamically channel assignments especially for the interactive and background traffic classes.

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Livres sur le sujet "General packet radio service network"

1966-, Sanders Geoff, dir. GPRS networks. Chichester, England : Wiley, 2003.

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GPRS : General packet radio service. New York : McGraw-Hill, 2001.

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McGuiggan, Peter. GPRS in Practice. New York : John Wiley & Sons, Ltd., 2005.

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GPRS in practice : A companion to the specifications. Chichester : Wiley, 2004.

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Ken, Carlberg, dir. Preferential emergency communications : From telecommunications to the Internet. Boston : Kluwer Academic Publishers, 2003.

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Sanders, Geoff, Manfred Reisky, Lionel Thorens, Stefan Deylitz et Oliver Rulik. GPRS Networks. Wiley & Sons, Incorporated, John, 2004.

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Sanders, Geoffrey, Manfred Reisky, Lionel Thorens, Stefan Deylitz et Oliver Rulik. Gprs Networks. Wiley & Sons, Incorporated, John, 2004.

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Siddiqui, Shahid. Roaming in Wireless Networks (Communications Engineering). McGraw-Hill Professional, 2005.

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Siddiqui, Shahid. Roaming in Wireless Networks (Communications Engineering). McGraw-Hill Professional, 2005.

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Bates, Regis "Bud" J., et Regis J. B. Bates. GPRS : General Packet Radio Service (Professional Telecom). McGraw-Hill Professional, 2001.

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Chapitres de livres sur le sujet "General packet radio service network"

Levesque, Allen H. « General Packet Radio Service ». Dans Handbook of Computer Networks, 658–74. Hoboken, NJ, USA : John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9781118256114.ch43.

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Priggouris, Giannis, Stathes Hadjiefthymiades et Lazaros Merakos. « Enhancing the General Packet Radio Service with IP QoS Support ». Dans Quality of Service in Multiservice IP Networks, 365–79. Berlin, Heidelberg : Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/3-540-44554-4_24.

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Louvros, Spiros. « Towards Unified Services in Heterogeneous Wireless Networks Based on Soft-Switch Platform ». Dans Encyclopedia of Multimedia Technology and Networking, Second Edition, 1416–22. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-60566-014-1.ch191.

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The last two decades, after the telecommunication and computer technology convergence, the world of telecommunication applications has changed dramatically. The traffic needs of the customers have moved from circuit switched applications towards packet switched applications (Cox, 1995). Data traffic, with the characteristics of information transmission in the form of packets and the bursty flow characteristics rather than constant rate, nowadays accounts for slightly more than 60% of the traffic that is transmitted over the backbone telecommunication networks (Esmailzadeh, Nakagawa, & Jones, 2003). In addition to data traffic, multimedia applications like video calls, IP TV, and multimedia messaging traffic (variable rate with real time constraints) was made possible by low cost video digitizing equipment (Houssos, Alonistioti, Merakos, Mohyeldin, Dillinger, Fahrmair, & Schoenmakers, 2003). Different Radio Access Technology (RAT) networks offer different services to their subscribers. This is a big problem for the multimedia industry since it poses certain constraints to the subscribers regarding specific technology handsets. The ideal solution might be a unified handset with a unified service subscriber identity module (SIM) card (Louvros & Iossifides, 2004). This handset should be able to access the service by any radio access network, like Global System Mobile (GSM) (Siegmund, Redl, Weber, & Oliphant, 1995), General Packet Radio System (GPRS), Universal Mobile Telecommunications System (UMTS), and IEEE802.11 standard (WiFi or WLAN) towards a common core platform. In order to achieve such a unification, the service request should be seamless to the radio access technology network and the core platform should support certain protocols to provide again seamless to the user access to the requested service. Such a platform is already designed and is known as the soft-switch solution. The idea behind the soft-switch solution is the layering of the core network management procedures (mobility management, call control, session management, charging) in such a way that the operator can support all requests as a unified routing process. Moreover the operator can deploy its core switch and transmission network based on a common backbone, designed according to the 3GPP standards on IP or ATM infrastructure, and also to be able to accommodate in the future any new radio access technology network simply and without any serious rearrangement of the existing backbone, thus eliminating cost implementation. Asynchronous Transfer Mode (ATM) technology is proposed by the telecommunication industry to accommodate multiple traffic types (packet and voice) in a high speed wire-line backbone network. Briefly, ATM is based on very fast (on the order of 2.5 Gbits/sec or higher (Q.2931 ATM Network Signaling Specification, ITU)) packet switching technology with 53 byte long packets called cells being transmitted through wireline networks running usually on fiber optical equipment (Louvros, Karaboulas, Iossifides, & Kotsopoulos, 2003).

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Xenakis, Christos. « Security in 2.5G Mobile Systems ». Dans Handbook of Research on Wireless Security, 351–63. IGI Global, 2008. http://dx.doi.org/10.4018/978-1-59904-899-4.ch022.

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The global system for mobile communications (GSM) is the most popular standard that implements second generation (2G) cellular systems. 2G systems combined with general packet radio services (GPRS) are often described as 2.5G, that is, a technology between the 2G and third generation (3G) of mobile systems. GPRS is a service that provides packet radio access for GSM users. This chapter presents the security architecture employed in 2.5G mobile systems focusing on GPRS. More specifically, the security measures applied to protect the mobile users, the radio access network, the fixed part of the network, and the related data of GPRS are presented and analyzed in detail. This analysis reveals the security weaknesses of the applied measures that may lead to the realization of security attacks by adversaries. These attacks threaten network operation and data transfer through it, compromising end users and network security. To defeat the identified risks, current research activities on the GPRS security propose a set of security improvements to the existing GPRS security architecture.

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Xenakis, Christos. « Security in 2.5G Mobile Systems ». Dans Mobile Computing, 2752–65. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-60566-054-7.ch208.

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Raghavi K., Anie Gincy V. G., Rajesh Banu J. et Dinesh Kumar M. « Municipal Solid Waste Management ». Dans Handbook of Research on Implementation and Deployment of IoT Projects in Smart Cities, 96–116. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-9199-3.ch007.

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Smart city technology evolved with the developments in wireless sensor networks (WSN) and the internet of things (IoT). IoT-based waste management is an advanced waste management system offered in smart cities. The practice of monitoring, transporting, and processing of solid waste are included in the waste management. Litter bins play an indispensable role in the waste collection process at the primary level. The process of monitoring litter bins would become difficult for the ones placed at out of reach areas and remotely located sites. Smart litter bin (SLB) is generally embedded with different types of sensors where used for sensing the garbage levels and locating the bins location. Radio frequency identification (RFID), sensors, global positioning systems (GPS), general packet radio service (GPRS) are the components in smart waste management system and are discussed in this chapter. These components were used to monitor the collection, transportation, processing, and dumping. This chapter also focuses on the perception of IoT architecture to upgrade waste management in smart cities.

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Sarkar, Nurul I., Anita Xiao-min Kuang, Kashif Nisar et Angela Amphawan. « Hospital Environment Scenarios using WLAN over OPNET Simulation Tool ». Dans Healthcare Administration, 789–804. IGI Global, 2015. http://dx.doi.org/10.4018/978-1-4666-6339-8.ch040.

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For the past ten years, heterogeneous networks wired and wireless had tended to integrate seamlessly, offering effective and reliable service for medical operations. One of the problems encountered by network practitioners is the seamless integration of network components into healthcare delivery. As a multiplexing hospital model, the implementation certainly presents some challenges. The major technical and performance issues involve are as following. The operating parameters should keep aligned to the Quality of Service (QoS) requirement throughout simulation. Bandwidth utilisation of wireless networking is a challenging issue for real-time multimedia transmission. IEEE 802.11 provides relatively lower data rate than wired networks, thus the developer tends to adopt a more compromised solution: either reduce the file size or compress the image packets. Communication performance that varies constantly with the impact of signal strength, traffic load and interference. As stated radio signal senses as a curve and attenuates greatly while metallic object and microwave exist within the active range. To ensure devices do not interfere with other electronic equipments (e.g. heart monitors), assert wireless spectrum has to be managed appropriately. This research paper aims to develop a generic hospital network scenarios using Wireless Local Area Network (WLAN) over OPNET Simulation, to evaluate the performance of the integrated network scenario for Intensive Care Units (ICU). This research makes use of computer simulation and discusses various aspects of the network design, so as to discover the performance behaviour pertaining to effect of traffic type, traffic load and network size. In the ICU scenario, the performance of video conference degrades with network size, thus, a QoS-enabled device is recommended to reduce the packet delay and data loss. IEEE 802.11a suits in hospital environment because it mitigates interference on the 2.4GHz band where most wireless devices operate. Experiment examines the effect of signal strength in WLAN. It is convinced that -88dBm is the best signal strength threshold. Although 802.11a generates slightly lower throughput than 802.11g, this issues can be addressed by placing more APs in the service area. It is convinced that 802.11a suits the hospital environments, because it mitigates interference on the popular 2.4GHz band where most wireless devices operate. It is important for medical devices which require future upgrade and Bluetooth deployment.

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« General Packet Radio Service (GPRS) ». Dans Communication Systems for the Mobile Information Society, 65–120. Chichester, UK : John Wiley & Sons, Ltd, 2006. http://dx.doi.org/10.1002/9780470033210.ch2.

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« General Packet Radio Service (GPRS) and EDGE ». Dans From GSM to LTE, 63–113. Chichester, UK : John Wiley & Sons, Ltd, 2011. http://dx.doi.org/10.1002/9780470978238.ch2.

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« General Packet Radio Service (GPRS) and EDGE ». Dans From GSM to LTE-Advanced, 73–128. Chichester, UK : John Wiley & Sons, Ltd, 2014. http://dx.doi.org/10.1002/9781118861943.ch2.

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Actes de conférences sur le sujet "General packet radio service network"

Awodele, Oludele, Victor Dibia, Oghenerukevwe Onoruvie et Sharon Okoruwa. « Services Provisioning on Mobile Devices via Bluetooth in a Localized Setting Using a Proposed System - BTServ ». Dans InSITE 2008 : Informing Science + IT Education Conference. Informing Science Institute, 2008. http://dx.doi.org/10.28945/3272.

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Conventionally, enterprise services that can be utilized by mobile devices such as E - mail, instant messaging, data transfer, news and event notification have been typically achieved using GPRS (General Packet Radio Service) connections to access internet servers that provide these services. Thus, even in a local area, disadvantages such as full dependence on GPRS service providers, incurred GPRS costs and slow data/communication rates constitute formidable drawbacks. This paper describes a system /Architecture (BTServ) in which these same services can be supplied via Bluetooth, with notable benefits such as high data rates, minimal dependence on external (GPRS) networks, higher security (internet attacks are totally avoided) and reduced cost, in a localized setting such as a corporate house.

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Bhaskar, H. « Intelligent packet scheduler for general packet radio service ». Dans Telecommunications Quality of Service : The Business of Success (QoS 2004). IEE, 2004. http://dx.doi.org/10.1049/ic:20040014.

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Siddiqui, Arsalan, Tahir Farooqui et Faisal Farooq. « Roaming Procedures in General Packet Radio Service ». Dans 2005 Student Conference on Engineering Sciences and Technology. IEEE, 2005. http://dx.doi.org/10.1109/sconest.2005.4382886.

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El-Dolil, Sami A., et Amir S. El-Safrawy. « General Packet Radio Service Performance Evaluation Considering Adaptive Overlapping ». Dans Proceedings of the Twenty Third National Radio Science Conference (NRSC'2006). IEEE, 2006. http://dx.doi.org/10.1109/nrsc.2006.386351.

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Sandoval Campos, Sebastian, Fabián A. Ballesteros Higuera, Sebastián Roa Prada, Claudia I. Cáceres Becerra et Alfredo A. Díaz Claro. « Development of a Low-Cost Sensor Network for Community-Made Measurements of Air Pollution ». Dans ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-23994.

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Abstract The levels of pollution present in the air have been dramatically increasing over the years due to the continuous emission of greenhouse gases such as CO2, CO, NOx and H2S, among others. The main source of these emissions is from burning fossil fuels for electricity, heat, and transportation. This represents a tremendous risk to the populations located near the emission sources where people get exposed to dangerous concentrations of such gases on a daily basis. The lack of open real-time monitoring tools makes people unaware of the damage these pollutants cause to their health. This research proposes the development and implementation of a low-cost independent solution to keep the members of a community informed about concentration levels of air pollution due to local emissions. This tool must be easily accessible to the users so that the data about the number of particulates per million of a specific gas within a zone of interest can be viewed at any time. The proposed solution consists of a sensor network, covering the widest possible area, with respect to the point of interest. The collected data is sent to a cloud server, which operates as storage center and in which the data can be latter accessed for subsequent analysis. The measurements are sent to the server by means of a wireless communication protocol, carried out by a General Packet Radio Service, GPRS, communication module connected to each station. In this way, the coverage of the network is not limited by issues such as the use of local area networks which at the same time facilitates the transportation and installation of the stations at any desired measurement site. Since each station can collect large amounts of data during a given period of time, it was necessary to implement techniques such as Big Data in order to extract important information and to identify patterns from the data such as the areas having the highest concentration of gases and possible correlations with other variables such as local weather conditions. This information could be used to support the making of decisions that benefit the communities impacted by air pollution, for example the early triggering of bad air quality alarms or the development of policies to regulate industry operation that can potentially impact the health of neighboring communities. A pilot case study was implemented in the city of Floridablanca, Colombia, to demonstrate the monitoring of the emissions of hydrogen sulfide of a big wastewater processing plant.

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Boyle, D. « Is GPRS ready for telemetry applications ? [general packet radio service] ». Dans Developments in Control in the Water Industry. IEE, 2003. http://dx.doi.org/10.1049/ic:20030259.

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El-Dolil, Sami A., et Amir S. El-Safrawy. « General Packet Radio Service Performance Evaluation Based on CIR Calculation, Considering Different Radio Propagation Models ». Dans 2007 National Radio Science Conference. IEEE, 2007. http://dx.doi.org/10.1109/nrsc.2007.371391.

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EL-Dolil, Sami A., et Amir S. EL-Safrawey. « Performance evaluation for integrated high altitude platforms-terrestrial General Packet Radio service system ». Dans 2007 International Conference on Computer Engineering & Systems. IEEE, 2007. http://dx.doi.org/10.1109/icces.2007.4447069.

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Elsafrawey, Amir Salah, et Sami Abdelmeneem Eldolil. « Performance evaluation for integrated high altitude platforms-terrestrial general packet radio service system ». Dans the 3rd ACM workshop. New York, New York, USA : ACM Press, 2007. http://dx.doi.org/10.1145/1298216.1298233.

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Tektas, Berna, et Sitki Gozlu. « General packet radio service (GPRS) technology transfer : A case study to evaluate transferors ». Dans Technology. IEEE, 2008. http://dx.doi.org/10.1109/picmet.2008.4599850.

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