نتایج جستجو برای: gprs

تعداد نتایج: 1181  

1999
Joseph Ho Yixin Zhu Seshu Madhavapeddy

The Global System for Mobile Communications (GSM) Phase 2+ standard specifies a new type of packet data service called General Packet Radio Service (GPRS). GPRS allows the dynamic allocation of bandwidth resources. Wireless channels are allocated to a mobile terminal based on its traffic demands. Thus results in better resource utilization compared to the circuit-based data services. In general...

1999
Shaoji Ni Yong Liang Sven-Gustav Häggman

General packet radio service (GPRS) is designed for transmitting packet data and supposed to take its radio resource from the pool of channels unused by GSM voice services. Obviously, the introduction of GPRS affects on the voice services. In this paper the outage probability of non-frequency hopping and frequency hopping systems with different frequency reuse factor has been calculated in ord...

1999
Qixiang Pang Amir Bigloo Victor C. M. Leung Chris Scholefield

While the quality of service (QoS) profiles for a number of general packet radio service (GPRS) classes has been specified [1] by ETSI, how QoS management is provided by means of traffic scheduling, traffic shaping, and connection admission control, in a GPRS network is an implementation issue that is attracting significant current research interest. This paper presents an evaluation of several...

2000
Mika Mizutani Christian Bonnet

The growth of the mobile network system of which the cellular systems like Global System Mobile Communications (GSM) and Personal Digital Cellular (PDC) are representative and the IP network attracts worldwide attention. The IP network access through the mobile data network system is required strongly to use the useful IP services anytime and anywhere. Therefore on the mobile data network syste...

Journal: :Journal of Circuits, Systems, and Computers 2007
Robert Simon Sherratt Kai Zhang Owen J. Wilkes

A block coprocessor for user data rate improvements to GPRS coding scheme 4. It is advisable to refer to the publisher's version if you intend to cite from the work. A block coprocessor for user data rate improvements to GPRS coding scheme 4. Abstract The General Packet Radio Service (GPRS) has been developed to allow packet data to be transported efficiently over an existing circuit switched r...

Journal: :HBRC Journal 2021

The vision is still not clear to the designers identify sustainable design strategy parameters. Also, most green building rating systems focus on environmental aspect without rest of sustainability aspects, which reduces opportunities their use in and assessment process construction industry general. Thus, research aims assess, develop, adjust path architecture based a basis has feature produce...

Journal: :IEEE Communications Surveys and Tutorials 1999
Christian Bettstetter Hans-Jörg Vögel Jörg Eberspächer

The General Packet Radio Service (GPRS) is a new bearer service for GSM that greatly improves and simplifies wireless access to packet data networks, e.g., to the Internet. It applies a packet radio principle to transfer user data packets in an efficient way between mobile stations and external packet data networks. This tutorial gives an introduction to GPRS. The article discusses the system a...

2004
Annika Wennström Anna Brunstrom Juan Rendón Jan H. Gustafsson

GPRS extends the widely deployed GSM system with a more efficient wireless Internet access. In this paper we investigate how a TCP transmission over GPRS is affected when it loses all its resources due to preemption by circuit-switched calls with higher priority. The results indicate that TCP performance is degraded more than necessary, as buffered data is flushed immediately when the GPRS traf...

2002
Juan Rendón Fernando Casadevall Jordi Carrasco

The General Packet Radio Service (GPRS) system will offer to the users an easy access to Internet applications which work with the TCP protocol. We analyse by means of simulations the performance in the GPRS network of the following wireless TCP proposals that use a proxy server: the Snoop protocol and the Split mechanism. We also describe the impact of the GPRS LLC layer in Acknowledged mode i...

2003
Annika Wennström Anna Brunstrom

GPRS extends the widely deployed GSM system with a more efficient wireless Internet access. In this paper we present measurements of GPRS traffic when preempted by circuit-switched calls. The results indicate that TCP performance is degraded more than necessary, as buffered data is flushed immediately when the GPRS traffic is preempted. The time required for error recovery is considerable also ...

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