共查询到19条相似文献,搜索用时 90 毫秒
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协议一致性测试方式的选择对MAC协议实现过程是非常重要的,在设计TD-LTE(时分-长期演进)MAC层协议实现的基础上运用了一种SDL(规范描述语言)+TTCN(树表结合表示法)的测试方式对其随机接入过程多种情况进行测试,最后用ARM芯片集成项目代码对测试的结果进行了正确验证。 相似文献
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TETRA数字集群通信系统移动性管理实体分析与实现 总被引:1,自引:0,他引:1
TETRA数字集群通信系统是ETSI推出的新一代数字集群通信标准,该标准在2000年前后进入中国后,TETRA数字集群系统在我国获得了较大规模的应用。移动性管理是TETRA集群系统(空中接口协议栈)的重要组成部分。本文在分析TETRA移动性管理的各功能实体的基础上,提出了TETRA终端移动性管理实体的开发过程,并用C语言编程实现后在OMAP5912(ARM和DSP)平台上测试,测试结果与协议标准一致。 相似文献
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可靠的高性能安全性算法是LTE高速数据传输的重要保障,接入层的安全性由PDCP子层来实现。介绍了在开发TD-LTE射频一致性测试仪的PDCP子层的过程中安全性流程的设计、加密和完整性保护算法的实现,然后采用规范描述语言(SDL)和树表描述语言(TTCN)的协仿真功能对PDCP层安全性流程设计和实现方法的正确性进行测试。测试表明该设计能实现接入层的安全性功能。 相似文献
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全面深入地分析了TD-SCDMA和TD-LTE双模终端协议互操作测试系统。首先,阐述了互操作测试的概念、互操作测试所依据的国内外标准以及具体测试内容;然后,具体分析了测试系统的软硬件架构和测试流程;最后,指出了测试系统的实际应用情况。 相似文献
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TD-LTE系统HARQ机制的设计与仿真 总被引:1,自引:0,他引:1
长期演进(TD-LTE)系统HARQ过程是移动通信系统中终端(UE)与基站进行数据传输的一个非常重要的过程,文章介绍了基于网络端的HARQ过程的设计方案,并以网络端为例,详细设计了网络端HARQ在MAC子层的具体流程及实现方案。通过说明和描述语言(SDL)和树表结合表示法(TTCN)协仿真,生成HARQ过程的消息顺序图(MSC),信号流程设计的正确性得到验证,在TD-LTE无线综合测试仪的开发中,该流程设计得到应用。 相似文献
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首先对TSM终端系统内异步切换流程进行了介绍和分析,然后根据实际的测试步骤,以终端的HL1为测试模块进行了一致性测试,并得到了仿真结果。一致性测试对于保证相应代码与协议的一致性,减少产品运行时发生错误的风险性具有十分重要的价值。 相似文献
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Group location management for mobile subscribers on transportation systems in mobile communication networks 总被引:1,自引:0,他引:1
Il Han Dong-Ho Cho 《Vehicular Technology, IEEE Transactions on》2004,53(1):181-191
We propose a new location tracking scheme for subscribers on transportation systems (TSs) in which a large number of fast-moving users have the same location as the TS. The group location tracking (GLT) scheme in which a group location update is performed instead of the IS-41's individual location update has been proposed. We propose a distributed GLT (DGLT) scheme based on several virtual visitor location registers (VVLRs) and representative identities. We analyze the GLT and DGLT schemes in view of the database (DB) access cost as well as the signaling cost under one-dimensional network architecture. Compared with the IS-41 scheme, the schemes based on group management generally have a lower signaling cost and a lower DB access cost due to a significant reduction in the number of location updates. As user mobility increases or the number of users on a TS increases, the performance of the group management schemes improves. The DGLT scheme, in which a corresponding home location register selects a closest VVLR among several possible VVLRs, generally has a lower signaling cost although a DB access cost is increased slightly compared with the GLT scheme. We also obtain the regions in which the DGLT is more efficient than the IS-41 and the GLT scheme. The DGLT scheme is an appropriate solution for high signaling cost systems and the GLT scheme is useful for high DB access cost systems. 相似文献
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Mobile satellite systems (MSSs) are being developed around the world to provide voice and data services to large populations
of mobile subscribers in rural and sparsely populated areas. To maintain efficient operation of an MSS, it is essential that
a network management system (NMS) be incorporated into the design. This paper presents a comprehensive review of these issues
in relation to the overall requirements of MSSs. Functions that need to be performed by the NMS are discussed in detail, under
the categories of configuration, fault, performance, accounting, security, capacity, service, and administration management.
An architecture for integrating NMS functions into the network control centre (NCC) and extending network management services
to other network elements is presented. The roles of enabling technologies such as expert systems, fault tolerant processors,
and objected‐oriented databases are examined.
This revised version was published online in June 2006 with corrections to the Cover Date. 相似文献
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详细介绍了呼伦贝尔市便携式应急移动调频中继系统实验测试过程.分析了该系统的性能和特点.并预测了其在森林防火中的应用前景。 相似文献
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软件质量的提升有利于促进国内软件业的迅速发展,而确保软件质量的一个关键环节是软件的测试,其是开发软件过程中的一项重要内容.强化软件测试,有利于软件质量的大大提高,从而促进国内软件企业与领域的稳定与健康发展.为此,本文阐述了软件测试的一些技术,以及软件测试管理的策略. 相似文献