AN OPTIMIZED SCHEME FOR FAST HANDOFF IN IP-BASED CDMA WIRELESS COMMUNICATION NETWORKS

This paper proposed an optimized fast handoff scheme for real time applications in next generation IP based CDMA wireless networks. The idea is to utilize optimized IP multicasting handoff (based on PIM SM), which is triggered by CDMA layer 2 functionality. An IP based cellular network model with WCDMA FDD air interface and IP based packet traffic is adopted. No special network entities and signaling for handoff are added in our network model. The simulation results show that low delay and low packet lost rate can be obtained.

A Three-dimensional IP-based Telecom Metropolitan Area Network Model

The Metropolitan Area Network (MAN) has faced serious problems after years of rapid development. The model of three-dimensional IP-based MAN, proposed by ZTE, is a next-generation MAN solution, which not only solves the existing problems but also brings new ideas for the development of next-generation MAN.

A distributed location management strategy for next- generation IP-based wireless networks

Location management is the most important function in mobility management technology. The hierarchical structure of the proposed hierarchical network-layer mobility management （HNMM） can reduce the signaling cost. The selforganizing topology scheme can enhance the robustness and quality of the mobility management. The information of location of the mobile node is stored in the distributed database, which makes the storage of the location information more reliable and robust, and more flexible strategies can be used. The numeric results show that HNMM can provide better performance than the general structure of mobile IPv6, when the mobile nodes move frequently and when there is high traffic throughput.

Optimizing Resource Management for IoT Devices in Constrained Environments

Embedded computing device implementation on the Internet of Things (IoT) requires careful assessment of their intrinsic resource limitations. These constraints are not limited to memory and processing capabilities but extend to the network interfaces, particularly due to the low-power radio standards that these devices typically employ. The IPv6 protocol is shown to be a strong option for guaranteeing interoperability in the IoT, mostly because of its large address space, the range of current IP-based protocols, and its intrinsic versatility. Considering these benefits, we investigate if current IP-based network management protocols can be implemented on devices with limited resources. We investigate the resource needs in particular for implementing Network Configuration Protocol (NETCONF) and Simple Network Management Protocol (SNMP) on an 8-bit AVR-based device. Our investigation reveals the specific memory and processing demands of these protocols, providing valuable insights into their practicality and efficiency in constrained IoT environments. This study underscores the potential and challenges of leveraging IPv6-based network management protocols to enhance the functionality and interoperability of IoT devices while operating within stringent resource limitations.

全台网架构下广电办公网的定位与安全策略

近年来旨在整合广电节目制作、播出、媒资管理、集中收录等各业务网络的所谓全台业务网系统建设在各台陆续实施,与此同时连接互联网的广电办公网因存在互联网访问,从网络安全考虑通常与全台业务网实行严格隔离,而互联网丰富的信息与素材资源又使得全台业务网与办公网之间的数据交流变得不可或缺。如何定位广电办公网与全台业务网之间的关系,如何通过科学、合理的安全策略制定,实现两网间数据传输的安全与高效,是各台亟待研究并解决的技术问题。

第四代移动通信现状及关键技术研究

随着数据通信与多媒体业务需求的发展,适应移动数据、移动计算及移动多媒体运作需要的第四代移动通信开始兴起。文章介绍了第四代移动通信的特征以及面临的挑战,对比分析了WiMAX与LTE技术的优劣以及发展现状,并对第四代移动通信核心技术MIMO-OFDM的原理与特点作了详细阐述。

对TINA技术潜力的再认识——TINA技术的应用和原理(九)

一、会议背景和新的导向 本次在马来西亚召开的《TINAWORKSHOP 2O02》会议(20O2.10.2～10.4),是按两年前TINA巴黎会议的安排召开的。 恰恰在这两年中,由于网络行业全球性盲目炒作,一大批国际知名企业陷入了“滞销、亏损、裁员、削减投入”的困境,不免影响其派员参加TIHA会议。尽管如此,这次TINA会议仍取得了预期的成功,并且获得了新的支撑。