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【多选题】
在2015年9月的RAN #69会议上经过激烈的PK,( )和( )的融合产物胜出,这就是NB-IoT。
A. NB-LTE
B. NB-CIoT
C. LTE-M
D. EC-GSM
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答案
AB
解析
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通过现场测试可以发现( )等问题。
A. 基站过载
B. 覆盖不足
C. 导频污染
D. 越区覆盖
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关于天线增益以下说法正确的是 :( ))。
A. 是与基准天线比较得出的相对值。
B. 是天线在其最大辐射方向的增益。
C. dBi 是天线增益相对于半波振子的参考值
D. dBd=dBi+2.15
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现有一张数据业务核心网,当终端用户数量增加时,PGW突然开始拒绝会话请求以下哪两项可以用来定位此问题?( )
A. 安全管理
B. 性能管理
C. 故障管理
D. 软件管理
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单站点验证测试网优人员需要完成哪些工作任务。( )
A. 数据业务接入功能测试
B. 单站点覆盖DT测试
C. 客户指定的验证测试,例如天线分集检查
D. 一些特殊场覆盖场景下,需要步测完成单站验证测试
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切换分为( ).( ).( )等3种阶段。
A. 切换准备
B. 测量报告
C. 切换执行
D. 切换完成
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NB-IoT的PCI规划要遵循以下哪些原则?( )
A. 邻区导频位置尽量错开
B. 同一小区所有的邻区列表中不能有相同的PCI
C. 即相邻的两个小区的PCI模3后余数不能相同
D. 即相邻的两个小区的PCI模4后余数不能相同
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TDD与FDD的差别( )
A. 帧结构差异:FDD.TDD帧结构不同?
B. 多址方式差异:FDD.TDD多址方式不同?
C. 带宽差异:FDD.TDD支持的带宽不同
D. 双工模式差异:FDD.TDD双工方式不同
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EUTRAN内切换包括( )。
A. eNodeB内的切换
B. 基于S1接口的切换
C. WCDMA的切换
D. 基于X2接口的切换
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一旦UE接收到时间提前命令,下列哪些信道将会调整提前发送时刻( )。
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B. PUCCH
C. SRS
D. DMRS
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UE附着获取IP地址的方式有哪些?( )
A. 通过DHCPv6方式获取
B. 通过DHCPv4方式获取
C. 通过DHCPv8方式获取
D. 从AttachAccept消息中获取
【多选题】
以下哪种情况一定会使直放站干扰基站( )。
A. 上行输出噪声电平过高
B. 自激
C. 下行交调产物串入上行
D. 室内分布系统天线过多
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在Google Earth中创建的点,线可以另存为哪种格式的文件?( )
A. KML
B. TXT
C. TAB
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P-CSCF 发现过程的机制包括( )。
A. DHCP 方式
B. Attach 方式
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IMS系统中用于与其他网络互通的网元有( )。
A. BGCF
B. MGCF
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D. IM MGW
E. PDF
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NB-IOT中支持3个SRB,分别是( )。
A. SRB1
B. SRB0
C. SRB1bis
D. SRB2
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5G中CCE聚合等级包括( )。
A. 2
B. 1
C. 8
D. 16
E. 4
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以下哪些是RRC建立原因?( )
A. HighPriorityAccess
B. MT-access
C. MO-data
D. MO-sigaling
E. emergency
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关于S5接口以下哪些表述是正确的?( )
A. SGW和PGW之间可以采用GTP_C协议
B. SGW和PGW之间的接口
C. SGW负责为UE分配IP地址
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CDMA系统通过软切换可以提高系统质量,体现在:( )
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C. 控制手机干扰
D. 改善小区覆盖
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直放站中的关键技术有( )。
A. 增益,功率控制技术
B. 低噪放电路技术
C. 收发双工技术
D. RAKE接收技术
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单站验证测试过程中,发现小区之间切换不及时,下列哪种解决办法是错误的?( )
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针对弱覆盖导致的初始E-RAB连接建立失败,可能的调整措施包括( )
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5G的含义包括:无所不在,超宽带,( )的无线接入。
A. 高可靠
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D. 高密度
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CDMA系统中, 切换失败的原因包括( )。
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B. 目标小区资源不可用
C. 声码器速率不匹配
D. 制定小区不存在
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F. 切换过程超时
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衰减器的主要用途是()。
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移动TDDLTE的F频段小区上行干扰源可能来自()
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B. 邻小区下终端的上行信号干扰
C. 邻近存在时钟故障的LTE小区干扰
D. 共站的GSM900谐波或DCS1800互调杂散干扰
E. 共站的TDS互调干扰
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跟踪区的设计原则包括:()。
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以下哪些QCI值的承载是默认承载?()
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VOLTE接通率为成功完成呼叫次数/终端发起呼叫总数。每次通话中,主叫UE发送第一条()后收到网络侧下发的()消息为成功完成呼叫。
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【多选题】
LTE下行采用了哪些多天线技术?()。
A. SFBC
B. MU-MIMO
C. FSTD
D. 波束赋形
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影响小区平均吞吐率的因素()。
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B. 本小区负载:直接影响本小区可使用的RB数
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LTE支持两种RRC状态()
A. RRC_IDLE
B. RRC_ConnectionRequest
C. RRC_CONNECTED
D. RRC_Disconnect
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NB-IoT系统中,包含的无线承载有()。
A. SRB0
B. SRB1bis
C. SRB1
D. SRB2
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NB-IOT支持DCI模式有()。
A. FormatN0
B. FormatN3
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OFDMnumerology是OFDM系统的基础参数集合,包含()。
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B. 系统带宽
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CDMA20001X系统反向功控包括:()
A. 开环功控
B. 精确功控
C. 闭环功控
D. 外环功控
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CDMA20001X支持()帧长。
A. 20ms
B. 80ms
C. 40ms
D. 60ms
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手机发起位置登记流程可能基于以下()情况。
A. 基于覆盖
B. 基于时间
C. 基于位置
D. 开关机
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以下哪些能增强VOLTE的覆盖?()
A. RLC分片
B. RoHC
C. 半静态调度
D. TTIBundling
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( ) 34. Judy Foreman copied down the phrase because she ___ . A. thought it was beautifully written B. wanted to know what it really meant C. decided to write it on a warehouse wall D. wanted her husband to put it up in the classroom
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( ) 37.The greatest river for navigation is ___________. A. the Nile B. the Amazon C. the Mekong D. the Mississippi
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( ) 38. From a dam, people can use the water for ___________. A. keeping the rivers clean B. only making electricity C. irrigation and making electricity D. washing clothes
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( ) 39. The water in the river is polluted because of _____________. A. people's drinking water too much B. people's swimming in the river too much C. chemicals and other materials D. people's building a dam across a river
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