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The indepth merging of the Industrial Revolution and the Internet Revolution, results in a new wave of the Industrial Internet revolution.The Industrial Internet, or Industry 4.0, has attracted great interests from both industry and academia as the fourth industrial revolution due to the rise of recent exponentially growing technologies (e. g., big data, cloud computing, networking, 3D printing, artificial intelligence, etc.) For example, different sensor data will be collected and sent to cloud computing for smart decisioning using big data technologies. In manufacturing, 3D printing technology also produces customized products of almost any shape at a lower costs but within a very short duration. The Industrial Internet is often understood as the application of the generic concept of Cyber Physical Systems (CPSs), within which the information from all industrial perspectives is closely collected, monitored from the physical space and synchronized with the cyber space. The demand of having information and services everywhere made CPS an inevitable trend in the highly networked world of today. And today there are many fields of applications for CPS in the industry, such as medical equipment, driving safety and driver assistance systems for automobiles, industrial process control and automation systems, etc. The melding of the physical industrial components, machines, fleets and factories with the advanced modern sensing and networking technologies, and big data analytics opens up tremendous opportunities to accelerate productivity, reduce inefficiency and waste, and enhance the working experience in the production process The Industrial Internet has the potential to bring profound transformation to traditional industries, such as manufacturing, aviation, rail transportation, health care, power generation, oil and gas development, etc. Overall, the Industrial Internet allows the interconnection and collaboration among devices and people in the industrial environment, reduces cost, and improves the productivity.The main content of this paragraph is about( ).

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试题三(20分)阅读下列说明,回答问题1至问题3,将解答填入答题纸的对应栏内。【说明】随着无线通信技术的不断发展,无线通信应用领域不断扩大,落后的无线通信系统不断被淘汰,如无线寻呼系统、第一代、第二代移动通信系统等,新的、先进的移动通信系统不断涌现。如:第五代移动通信系统。【问题1】(6分)在(1)-(6)中填写恰当内容(将应填入(n)处的字句填写在答题纸的对应栏内)。WCDMA系统中,(1)码用于区分信道,(2)码在上行方向区分不同用户,(3)码在下行方向区分不同小区。TD-SCDMA的基本(4)特性由频率、码和时隙决定,其帧结构将10ms的无线帧分成两个5ms子帧,每个子帧中有(5)个常规时隙和(6)个特殊时隙。【问题2】(5分)请在下列可选项中选择最合适的一项(将正确答案的字母编号填写在答题纸的对应栏内)。(1)当移动终端从一个位置区移动到另一个位置区时,发现其存储器中的位置区识别码LAI与接收到的位置区识别码LAI发生了变化,需向网络进行重新登记,这个过程为( )。A、切换登记 B、位置登记 C、位置更新 D、漫游管理(2)移动终端完成网络选择后需要寻找网络允许的所有广播控制信道频点,并选择一个最合适的频点进行驻留,将该频点服务的小区选为自己的主服务小区,这个过程为( )。A、小区搜索 B、小区选择 C、小区重选 D、小区广播(3)5G需求中移动性支持的最高速度是( )公里/小时。A、100 B、250 C、350 D、500(4)5G需求中高可靠、低时延通信场景(URLLC)下,空中接口时延为( )毫秒。A、1 B、2 C、3 D、4(5)如下选项中,( )不属于5G无线接入的关键技术。A、大规模天线阵列 B、移动边缘计算 C、超密组网 D、全频谱接入【问题3】(9分)(1)(4分)①请说明什么是切换?(2分)②请列出小区切换的2个主要原因。(2分)(2)请列举5个5G的三大应用场景中海量机器类通信场景(mMTC)下的典型应用。(5分)

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