ID 原文 译文
58408 为了降低物联网( IoT) 系统中通信设备的平均接入时延，提高接入成功率，设计了一种适用于大量通信设备竞争接入的前导序列，并提出了相应的随机接入方案. A random access ( ＲA) scheme based on sub-preambles is proposed to reduce average ＲA delay and improve ＲA success ratio for internet of thing ( IoT) systems. Specifically，novel sub-preambleconsidering frequency division multiple access is designed.
58409 该随机接入前导序列主要基于对原序列的频分复用，增加了可用的前导序列数量，从而降低了接入冲突概率，减少了接入冲突所造成的接入时延与物理上行共享信道资源的浪费. The sub-preambles are used to increase thenumber of available preamble sequences，so that preamble collision probability is reduced. Further，aＲA scheme using sub-preambles is presented. However，the proposed ＲA scheme will alleviate the wasteof resources caused by preamble collision.
58410 仿真结果表明，该随机接入冲突检测算法可以有效地降低 IoT 系统中通信设备的平均接入时延，提高通信设备的接入成功率. Compared with several ＲA schemes，simulation results showthat the proposed approach can effectively reduce average delay and increase success ratio.
58411 针对第 3 代合作伙伴计划( 3GPP) 提出的增强型机器类型通信( eMTC) 技术方案，总结了 eMTC 在第 5 代移动通信系统( 5G) 大连接场景下的一系列技术改进，从系统成本与复杂度、网络覆盖范围和功耗 3 个方面对其进行了讨论与分析，并介绍了 Ｒel-14 eMTC 的主要增强与演进技术，最后根据目前物联网所面临的问题，对 eMTC 未来的发展趋势进行了阐述与分析. In order to clarify the enhanced machine type communications ( eMTC) proposed by the thirdgeneration partnership project ( 3GPP) ，the improvements of eMTC for support of 5G mMTC scenarioswere summarized. Key technologies were discussed and analyzed in terms of system cost and complexity，coverage and power consumption. Besides，the main technical enhancements of eMTC in Ｒel-14 wereintroduced. Finally，the future development trend for eMTC was also be interpreted and analyzed basedon present existing problems.
58412 针对原有固定重传起始位置方案所存在的问题，基于第 5 代移动通信系统( 5G) 的混合自动重传请求( HAＲQ) 传输策略，提出了一种重传位置灵活可变的动态低密度校验码递增冗余 HAＲQ 传输方案. Based on the hybrid automatic repeat request ( HAＲQ) transmission strategy，an incrementalredundancy HAＲQ ( IＲ-HAＲQ) retransmission scheme with flexible retransmission location suitable forthe fifth generation of mobile communications system ( 5G) low-density parity-check ( LDPC) codes wasproposed.
58413 与 5G 标准中的现有方案相比，在每次传输长度相同的情况下，该方案具有较低的译码复杂度和译码时延. Compared with the existed scheme in 5G standard，this new transmission scheme has low decoding complexity and decoding delay for the same transmission length.
58414 仿真结果表明，所提出的方案在不同初传码率和不同调制方式下比 5G 现有方案均有一定的性能提升. Simulation results also showed thatthe proposed IＲ-HAＲQ scheme outperformed the 5G HAＲQ retransmission scheme over the additivewhite Gaussian noise ( AWGN) channel with different modulation constellations and different transmissioncode rates.
58415 连续广域覆盖、热点高容量、低功耗大连接和低时延高可靠是第 5 代移动通信系统( 5G) 四大主要技术场景. Seamless wide-area coverage，high-capacity hot-spot，low-power massive-connections and lowlatency high-reliability are the four major technical scenarios of the fifth generation of mobile communications system( 5G) .
58416 移动台的位置信息不仅是新业务的需求，更能有效应对 5G 新业务在流量密度、连接数量、超低时延、高可靠性、高移动性上面临的挑战. The location information of the mobile terminal is not only the demand of new services，but also effectively meets the key challenges faced by 5G new services in terms of traffic density，number of connections，ultra-low latency，high reliability，and high mobility.
58417 针对面向 5G 的定位技术研究展开综述，并对定位技术涉及的主要方向进行了分析; A survey of positioningtechnology oriented to 5G is given by analyzing the main directions involved in positioning.