نتایج جستجو برای: geran

تعداد نتایج: 32  

2006
L. Giupponi R. Agusti J. Pérez-Romero O. Sallent

An economic driven JRRM algorithm is introduced in a multicell scenario based on guaranteeing a certain user acceptance probability of a given service while at the same time increasing the network provider revenue. It includes both service price and user utility and allows an operator to envisage the price impact on the final revenue attained. The paper focuses on two profiles, namely consumer ...

Journal: :Wireless Personal Communications 2005
Matías Toril Ricardo Ferrer Salvador Pedraza Volker Wille Juan J. Escobar

Half-Rate (HR) channel coding can be used to deal with temporary traffic peaks in Global System for Mobile Communications (GSM)/Enhanced Data Rates for Global Evolution (EDGE) Radio Access Networks. Since operators have to pay for the use of HR codecs, the number of transceivers on which HR can be used is normally limited. An algorithm that optimizes the assignment of a limited number of HR cod...

2010
Tavares Iida Vieira Paiva

Due to the increasing demand for data services in mobile networks, operators are observing the quality of data services to degrade as their packed switched (PS) resources become insufficient. Even though there are newer 3/4G technologies available, EGPRS is still a good solution for data services due to ubiquitous coverage, the availability of low cost user terminals and its low deployment cost...

2005
Patrick Nickel Wolfgang Gerstacker Robert Schober Wolfgang Koch

Inspired by recent TSG GERAN (Technical Specification Group GSM EDGE Radio Access Network) contributions, we propose a multiple–input multiple–output (MIMO) transmission scheme for GSM/EDGE (Enhanced Data Rates for GSM Evolution) with two antennas on each side. Performance is compared to that of single–antenna transmission with one and two receive antennas, respectively. Also, an approximation ...

2002
H. Montes Gerardo Gómez D. Fernandez

In this paper, an end-to-end Quality of Service (QoS) framework for streaming services in 3G mobile networks is considered. A solution based on a Public Land Mobile Network (PLMN) hosted multimedia streaming service is studied to avoid accessing through an external IP packet data network (IP-PDN) to streaming services. Under this scenario, the interaction between UMTS and IETF protocols and mec...

Journal: :Signal Processing 2006
Hrvoje Jenkac Thomas Stockhammer Wen Xu

In this paper different error protection strategies in different protocol layers are discussed, in order to reliably broadcast multimedia data within existing wireless networks. In particular, we investigate the performance of additional Forward Error Correction (FEC) in the physical layer, the Radio Link Control (RLC) layer, and the Realtime Transport Protocol (RTP) layer for Multimedia Broadc...

2001
Hüseyin Arslan Jung-Fu Cheng Kumar Balachandran

EDGE has enabled the GSM network to offer third generation services as part of the UMTS core network. This is due to the introduction of 8PSK modulation and the recent specification of interfaces from the GERAN to the UMTS core network. This paper studies further improvements to the spectral efficiency and capacity of EDGE through the use of more sophisticated adaptive modulation schemes based ...

2011
Sandeep Singh Sengar Alok Singh Pramod Narayan Tripathi Sam Higginbottom

Mobile Ad-hoc Network is a self configurable routing protocol. Nodes in MANET can shift freely from one place to another place and each node in MANET can take action as a transmitter, receiver and router. WiMAX is a telecommunication technology standard which provides fixed and mobile Internet access. Access Server Network (ASN) in WiMAX provides the layer 2 connectivity to the user equipments....

2007
Dapeng Hao

The Dual Symbol Rate (DSR) technique is a candidate for GERAN (GSM/EDGE Radio Access Network) evolution and has recently gained much interest. DSR uses the concept of decreasing the symbol duration to increase the uplink data rate of EGPRS (Enhanced General Packet Radio Service). The conventional GSM/EDGE training sequences can not be adopted to the EDGE system enhanced by DSR since the channel...

Journal: :Wireless Personal Communications 2011
Matías Toril Iñigo Molina-Fernández Volker Wille Chris Walshaw

Abstract. Over the last few years, graph partitioning has been recognized as a suitable technique for optimizing cellular network structure. For example, in a recent paper, the authors proposed a classical graph partitioning algorithm to optimize the assignment of cells to Packet Control Units (PCUs) in GSMEDGE Radio Access Network (GERAN). Based on this approach, the quality of packet data ser...

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