• Title/Summary/Keyword: general packet radio service

Search Result 17, Processing Time 0.04 seconds

Performance Issues with General Packet Radio Service

  • Chakravorty, Rajiv;Pratt, Ian
    • Journal of Communications and Networks
    • /
    • v.4 no.4
    • /
    • pp.266-281
    • /
    • 2002
  • The General Packet Radio Service (GPRS) is being deployed by GSM network operators world-wide, and promises to provide users with “always-on” data access at bandwidths comparable to that of conventional fixed-wire telephone modems. However, many users have found the reality to be rather different, experiencing very disappointing performance when, for example, browsing the web over GPRS. In this paper, we examine the causes, and show how unfortunate interactions between the GPRS link characteristics and TCP/IP protocols lead to poor performance. A performance characterization of the GPRS link-layer is presented, determined through extensive measurements taken over production networks. We present measurements of packet loss rates, bandwidth availability, link stability, and round-trip time. The effect these characteristics have on TCP behavior are examined, demonstrating how they can result in poor link utilization, excessive packet queueing, and slow recovery from packet losses. Further, we show that the HTTP protocol can compound these issues, leading to dire WWW performance. We go on to show how the use of a transparent proxy interposed near the wired-wireless border can be used to alleviate many of these performance issues without requiring changes to either client or server end systems.

Design of Intelligent Management and Service System for Gas Valve

  • Wang, Xiaoli;Wang, Feifei;Song, Yuhou;Zhang, Guirong;Wang, Shaohui
    • Journal of Information Processing Systems
    • /
    • v.16 no.5
    • /
    • pp.1095-1104
    • /
    • 2020
  • This paper introduces a design scheme of intelligent gas valve management and service system based on Internet. This scheme adds sensor and general packet radio service (GPRS) modules to the traditional gas valve and establishes communication connection between gas valve and the server through wireless packet communication technology, which makes the traditional gas valve have the networking ability. Compared with the traditional gas valve management and service business, the method proposed in this paper is more convenient and efficient.

IMT-2000 Packet Data Processing Method utilizing MPLS (MPLS망을 적용한 IMT2000 시스템에서의 패킷 데이터 처리 절차)

  • Yu, Jae-Pil;Kim, Gi-Cheon;Lee, Yun-Ju
    • The Transactions of the Korea Information Processing Society
    • /
    • v.6 no.11S
    • /
    • pp.3190-3198
    • /
    • 1999
  • Because of the rapid growth of the mobile communication, the need for the mobile internet access has grown up as well. since the current mobile communication network, however, is optimized for a voice communication system, which exclusively occupies a channel for a given time, it is not suitable for variable rate packet data. In order to support the mobile internet access, it is essential do design a reasonable packet switching network which supports the mobility. Since mobile packet network has longer latency, high speed switching and QoS are required to meet the user's requirements. In this paper, we suggest an resonable way to construct a network and its operation procedures utilizing GPRS(General Packet Radio Service) network and MPLS(Multi Protocol Label Switching) to provide a high speed switching and QoS mobile internet access. GPRS is used as a network which supports the mobility and MPLS guarantees the QoS and high speed IP protocol transmission based on the ATM switching technology.

  • PDF

PPP CHAP (Challenge Handshake Authentication Protocol) Modification for Wireless Internet Access of Remote Mobile Subscriber on GPRS (General Packet Radio Service) Network (GPRS 망에서 원격 이동 가입자의 무선 인터넷 접속을 위한 PPP CHAP 개선)

  • Park, Jeong-Hyeon;Kim, Yeong-Jin;Lee, Yun-Ju;Yang, Jeong-Mo
    • The KIPS Transactions:PartC
    • /
    • v.9C no.4
    • /
    • pp.551-562
    • /
    • 2002
  • We usually applied PPP CHAP when the visited ISP subscriber accesses to authentication server in own home ISP network and IP Assignment for remote Internet service. But PPP CHAP doesn't support in case of visited ISP subscriber in GPRS network accesses to authentication sorrel in own home ISP network for wireless Internet service. We suggest solution for this problem with PPP CHAP improvement. For this we propose the modified PPP CHAP message format, PCO Message format at MT, and interworking message and format between GGSN and RADIUS in home ISP network for wireless internet service of mobile ISP subscriber at GPRS network in this paper. We also show authentication results when visited mobile ISP subscriber via PPP CHAP at GPRS network accesses the RADIUS server in home ISP network.

Analyses of a Signal Traffic for Authentication in Mobile Sensor Network (이동 센서 네트워크망에서의 인증 메카니즘 신호의 트래픽 분석)

  • Kim Jung-Tae
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.9 no.7
    • /
    • pp.1524-1528
    • /
    • 2005
  • In this paper, we analyses of a traffic for authentication signaling in third generation mobile sensor network. In universal mobile telecommunication system, authentication functions are utilized to identify and authentication a mobile station and validate the service request network services. The authenticating parties are the authentication the serving general packet radio service support node access the authentication center to obtain the authentication with the mobile station. In this paper, we propose that the automatic cost-effective solution size of the authentication vector array.

Analyses of atraffic for authentication signaling in third generation mobile sensor network (제3세대 이동 센서 네트워크망에서의 인증 메카니즘 신호의 트래픽 분석)

  • Kim, Jung-Tae
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
    • /
    • v.9 no.2
    • /
    • pp.275-279
    • /
    • 2005
  • In this paper, we analyses of a traffic for authentication signaling in third generation mobile sensor network. In universal mobile telecommunication system, authentication functions are utilized to identify and authentication a mobile station and validate the service request network services. The authenticating parties are the authentication the serving general packet radio service support node access the authentication center to obtain the authentication with the mobile station. In this paper, we propose that the automatic cost-effective solution size of the authentication vector array.

  • PDF

The Control Mechanism on SVC holding time of Core Network in GPRS/ UMTS Network (GPRS/UMTS의 Core Network에서 SVC holding time 제어기법)

  • Kwak, Yong-Won;Park, Ung;Jeong, Young-Sik;Min, Jae-Hong
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
    • /
    • 2003.05a
    • /
    • pp.648-652
    • /
    • 2003
  • In the GPRS(General Packet Radio Service) network, the transport layer between SGSN(Serving GPRS Support Node) and GGSN (Gateway GPRS Support Node) is based on IP-Over ATM Network. which means that the connectionless IP traffic is transmitted through connection oriented ATM transport layer. Efficient resource management is needed to perform connection and disconnection of the pertinent VC because of the connectionless IP traffic being passed through ATM transport layer In this paper, Internet Web service traffic model in the GPRS network is applied to the various VC holding Cost Pricing Model. each method is compared through analyzing each VC utilization and setup rate.

  • PDF

Performance Evaluation of a Windowed-Sinc Function-Based PAPR Reduction Scheme for OFDM Polar Transmitters (OFDM polar transmitter를 위한 windowed-sinc 함수 기반의 PAPR 감소기법의 성능평가)

  • Seo, Man-Jung;Shim, Hee-Sung;Im, Sung-Bin
    • Journal of the Institute of Electronics Engineers of Korea TC
    • /
    • v.47 no.1
    • /
    • pp.10-18
    • /
    • 2010
  • The polar transmitter is applied to the narrowband communication systems such as GSM (Global System for Mobile Communications), EDGE (Enhanced Data Rates for GSM Evolution), and GPRS (General Packet Radio Service). To apply polar transmitter for the wideband communication like OFDM (Orthogonal Frequency Division Multiplexing) where the high PAPR (Peak-to-Average Power Ratio) problem occurs, this paper proposes a windowed-sinc function based PAPR reduction scheme. The proposed algorithm mitigates the effect of excessive suppression due to successive peaks or relatively high peaks of the signal. The BER (Bit Error Rate) and EVM (Error Vector Magnitude) performances are measured for various window types and lengths. The simulation results demonstrate that the proposed algorithm achieves significant improvement in terms of BER and PAPR reduction performance with similar spectrum performance to the conventional peak windowing scheme.

The Unified UE Baseband Modem Hardware Platform Architecture for 3GPP Specifications

  • Kwon, Hyun-Il;Kim, Kyung-Ho;Lee, Chung-Yong
    • Journal of Communications and Networks
    • /
    • v.13 no.1
    • /
    • pp.70-76
    • /
    • 2011
  • This paper presents the unified user equipment (UE) baseband modulation and demodulation (modem) hardware platform architecture to support multiple radio access technologies. In particular, this platform selectively supports two systems; one is HEDGE system, which is the combination of third generation partnership project (3GPP) Release 7 high speed packet access evolution (HSPA+) and global system for mobile communication (GSM)/general packet radio service (GPRS)/enhanced data rates for GSM evolution (EDGE), while the other is LEDGE system, which is the combination of 3GPP Release 8 long term evolution (LTE) and GSM/GPRS/EDGE. This is done by applying the flexible pin multiplexing scheme to a hardwired pin mapping process. On the other hand, to provide stable connection, high portability, and high debugging ability, the stacking structure is employed. Here, a layered board architecture grouped by functional classifications is applied instead of the conventional one flatten board. Based on this proposed configuration, we provide a framework for the verification step in wireless cellular communications. Also, modem function/scenario test and inter-operability test with various base station equipments are verified by system requirements and scenarios.

Public Key based GPRS Authentication Protocol and Key management (공개키 기반의 GPRS 인증 프로토콜과 Key 관리에 관한 연구)

  • Kim, Sung-Yong;Song, Yoon-Kyung;Choi, Hyun;Park, Dong-Sun
    • Proceedings of the IEEK Conference
    • /
    • 2003.07a
    • /
    • pp.117-120
    • /
    • 2003
  • GPRS(General Packet Radio Service) 서비스는 circuit 기반의 GSM(Global System for Mobile Communication)의 기본 망구조를 이용하여 packet 서비스를 지원하도록 변형시킨 모델이다. 기본적으로 GPRS는 GSM의 많은 부분을 계승하여 서비스를 지원하고 있기 때문에 GSM이 가지고 있던 문제점을 그대로 이어받게 되었는데, 본 논문에서는 사용자 인증 프로시져등에서 문제시 될 수 있는 부분들에 대해 살펴보고, 이를 보완 할 수 있는 방법으로 공개키의 암호화 모드와 인증 모드를 사용한 인증 프로시져와 시스템 구조를 소개하고자 한다. 또한 공개키 구조의 인증을 사용함으로써 필요로 하게 되는 키 관리에 대한 방법을 제시하고 앞으로 해결해 나가야 될 문제에 대해 언급을 하고자 한다.

  • PDF