摘要
基于蜂窝网络的窄带物联网(NB-IoT)的随机接入过程相对于长期演进(LTE)而言,进行了大量简化,同时针对NB-IoT系统的相关特性也作了适当修改。文章详细分析了NB-IoT系统中基于竞争模式的随机接入过程,包括覆盖等级选择、资源配置和实现流程等;对NB-IoT新添加的挂起与恢复过程进行了系统研究,并设计了相应的流程图。基于测试及测试控制表示法第3版(TTCN-3)测试平台,搭建了一致性测试环境,对随机接入过程进行了测试,测试结果与预期结果相同,验证了其与标准的一致性。
Cellular network based random access process of the Narrow Band Internet of Things （NB IoT） is much simpler than Long Term Evolution （LTE）. It is also appropriately modified for its features. In this paper, the random access process based on competitive mode in NB loT system is analyzed in detail, including coverage level selection, resource allocation, implemen ration process and so on. At the same time, the newly added suspend and resume process of NB loT is systematically studied, and the corresponding flow chart is designed. Based on the TTCN 3 test platform, a conformance test environment is built, and the random access process is tested. The test results are the same as the expected results, which verify the consistency with the standard.
作者
张德民
张颖
周述淇
舒强
ZHANG De-min;ZHANG Ying;ZHOU Shu-qi;SHU Qiang(Chongqing Key Lab of Mobile Communication Technology,Chongqing University of Posts and Telecommunications,Chongqing 400065,Chin)
出处
《光通信研究》
北大核心
2018年第4期74-78,共5页
Study on Optical Communications
基金
国家科技重大专项基金资助项目(2012ZX03001024
2017ZX03001021)
