共查询到20条相似文献,搜索用时 125 毫秒
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《电子工程师》2003,29(4)
Mobility Network Systems(MNS)与北电网络在某展会上联合演示了用于 Wi- Fi网络并基于 IP的MNS无线接入网络 (ip RAN)解决方案 ,这次演示通过把 MNS ip RAN结合到北电网络 Univity网关GPRS支持节点中来向公众展示了 Wi- Fi与 GSM/GPRS网络及服务的集成。北电网络与 Mobility Network Systems联合推出的端到端解决方案将提供运营商级的 Wi- Fi公共接入功能 ,从而解决主要的安全性、认证、漫游、切换及网络管理问题。这项灵活的解决方案可无缝移植到北电网络 GSM、GPRS以及 UMTS核心网络中 ,从而使客户能够利用现有商业… 相似文献
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《无线电技术与信息》2005,(2):74-74
在2005年2月中旬戛纳举办的3GSM世界大会上,北电*[NYSE/TSX:NT]通过现场GPRS、EDGE、UMTS和HSDPA网络,一展其无线宽带数据业务。北电的展示主要集中在各种解决方案,用以优化网络、满足无线宽带未来需求以及实现有助于增加运营商收入和提高客户忠诚度的服务和应用。 相似文献
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On demand network-wide VPN deployment in GPRS 总被引:1,自引:0,他引:1
Mobile Internet requires enhanced security services available to all mobile subscribers in a dynamic fashion. A network-wide virtual private network deployment scenario over the General Packet Radio Service is proposed and analyzed from a security viewpoint. The proposed security scheme improves the level of protection that is currently supported in GPRS and facilitates the realization of mobile Internet. It secures data transmission over the entire network route from a mobile user to a remote server by utilizing the default GPRS ciphering over the radio interface, and by deploying an IP VPN over the GPRS core, as well as on the public Internet. Thus, on-demand VPN services are made available for all GPRS network subscribers and roaming users. The VPN functionality, which is based on the IPsec framework, is outsourced to the network infrastructure to eliminate the potential computational overhead on the mobile device. The VPN initialization and key agreement procedures are based on an Internet Key Exchange protocol proxy scheme, which enables the mobile station to initiate VPN establishment, while shifting the complex key negotiation to the network infrastructure. The deployed VPN operates transparently to the mobile subscribers' movement. The required enhancements for security service provision can be integrated in the existing network infrastructure; therefore, the propose security scheme can be employed as an add-on feature to the GPRS standard. 相似文献
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Jeong-Hyun Park 《Communications Magazine, IEEE》2002,40(4):38-49
With the advent of IP technologies and the tremendous growth in data traffic, the wireless industry is evolving its core networks toward IP technology. Enabling wireless Internet access is one of the upcoming challenges for mobile radio network operators. The General Packet Radio Service is the packet-switched extension of GSM and was developed to facilitate access to IP-based services better than existing circuit-switched services provided by GSM. We illustrate how a visited mobile subscriber on a GPRS/UMTS network can access his/her home network via the gateway GPRS support node (GGSN). We also propose some implementation ideas on wireless Internet access for a remote mobile subscriber based on a GPRS/UMTS network 相似文献
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Oliver T.W. Yu 《Mobile Networks and Applications》2003,8(3):255-267
The General Packet Radio Service (GPRS) offers performance guaranteed packet data services to mobile users over wireless frequency-division duplex links with time division multiple access, and core packet data networks. This paper presents a dynamic adaptive guaranteed Quality-of-Service (QoS) provisioning scheme over GPRS wireless mobile links by proposing a guaranteed QoS media access control (GQ-MAC) protocol and an accompanying adaptive prioritized-handoff call admission control (AP-CAC) protocol to maintain GPRS QoS guarantees under the effect of mobile handoffs. The GQ-MAC protocol supports bounded channel access delay for delay-sensitive traffic, bounded packet loss probability for loss-sensitive traffic, and dynamic adaptive resource allocation for bursty traffic with peak bandwidth allocation adapted to the current queue length. The AP-CAC protocol provides dynamic adaptive prioritized admission by differentiating handoff requests with higher admission priorities over new calls via a dynamic multiple guard channels scheme, which dynamically adapts the capacity reserved for dealing with handoff requests based on the current traffic conditions in the neighboring radio cells. Integrated services (IntServ) QoS provisioning over the IP/ATM-based GPRS core network is realized over a multi-protocol label switching (MPLS) architecture, and mobility is supported over the core network via a novel mobile label-switching tree (MLST) architecture. End-to-end QoS provisioning over the GPRS wireless mobile network is realized by mapping between the IntServ and GPRS QoS requirements, and by extending the AP-CAC protocol from the wireless medium to the core network to provide a unified end-to-end admission control with dynamic adaptive admission priorities. 相似文献
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田华锋 《电信工程技术与标准化》2008,21(8):13-18
随着GPRS网络的进一步完善,用户对手机上网的需求增长进一步加快,竞争对手也在数据业务方面采取了更竞争性的网络建设及优化手段,用户对移动网络的上网速率要求越来越高,这对我们的GPRS、EDGE优化提出了更高的要求。本文主要介绍诺基亚西门子通信载波分层技术对改善客户上网感知方面的技术进行分析,也对其技术应用情况进行了介绍。 相似文献
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针对请求计时到引起GPRS网络中手机WAP接入失败的情况,从WAP协议栈中的WSP协议层、WTP协议层、GPRSRLC/MAC协议层以及GSMUm接口第三层对同时在GPRSGb接口和GSMUm接口采集到的消息进行了关联的协议分析。分析结果表明,请求计时到引起GPRS网络中手机WAP接入失败是由于在超时重传消息过程中手机侧的WTP协议层无响应所致,与GPRS无线承载网络及GSMUm接口无关。 相似文献
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使用单片机实现GPRS通信小系统的研究 总被引:1,自引:0,他引:1
提出用单片机控制GPRS(通用分组无线电业务)模块进行无线通信。本系统属于远程电力终端抄表的一个模块。主要研究以单片机为中心的小型GPRS通信方案。在GSM(全球移动通信系统)和GPRS网络较好的情况下,本系统能够较稳定地联入无线网络,与手机、计算机服务器等通信,通过GPRS方式传递数据,由手机设置读取通信参数或由计算机传递数据等,具有很高经济价值。 相似文献
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GPRS与UMTS系统网络接入安全机制的比较与研究 总被引:2,自引:0,他引:2
详细介绍了GPRS与UMTS系统的网络接入安全机制,分析了GPRS系统中存在的安全漏洞及UMTS较GPRS在网络接入安全性方面的改善,最后分析了UMTS系统中存在的安全缺陷。 相似文献
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本文从中国移动现网的角度出发,通过对GPRS串号现象的介绍来说明GPRS鉴权功能在网络安全中的重要性,并介绍了集团公司在天津测试的结果和结论.此外,还列举了鉴权功能开启后可能遇到的若干问题及相应的解决方法,旨在为其他省市公司提供借鉴,共同提高网络的安全性和可靠性. 相似文献
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GPRS网络上MMS业务的实现方法 总被引:1,自引:0,他引:1
MMS是运行于GPRS承载网络之上的一个高层应用。而GPRS是在GSM Phase 2 阶段实现的内容,是对GSM网络的一个升级,把分组交换网络引入到了传统GSM的电路交换网络中,从而实现了宽带的移动数据通信。由于GPRS数据交换采用的是IP包交换的方式,从而把Internet网络从固定网延伸到了移动网,极大地改进了Internet网络的通讯接入方式,做到了随时随地都可以接入Internet网络。主要讨论无线终端接入GPRS网络以及MMS消息的具体实现方法。 相似文献