【2017年整理】网优试卷-精装版.docVIP

【必考题】??How many ARFCNs can an operator use if allocated 15 MHz uplink and15 MHz downlink (minus one for guardband)???e?????(1分)??A.14 ARFCNs??B.15 ARFCNs??C.29 ARFCNs??D.75 ARFCNs??E.74 ARFCNs 【必考题】??A cell has three TRUs with an SDCCH/8 configuration. What is the maximum number of telephone calls it can support simultaneously with a half-rate vocoder????b?????(1分)??A.22??B.44??C.8??D.3??E.46 【必考题】??A cell has three TRUs with an SDCCH/8 configuration. What is the maximum number of telephone calls it can support simultaneously with a half-rate vocoder????b????(1分)??A.22??B.44??C.8??D.3??E.46 【必考题】??What cell property is limited by timing advance??c??????(1分)??A.Number of simultaneous calls??B.Frequency of call setups??C.Radius??D.Antenna length??E.Color 【必考题】??Reusing frequencies in a cellular pattern (compared to “one big cell”)??????(1分)??A.Increases channel utilization, cost ,and interference.??B.Increases capacity and cost, but decreases interference.??C.Increases capacity, but decreases cost and interference.??D.Increases capacity, cost, and interference.??E.Increases channel utilization and cost, but decreases interference. 【必考题】??What is the ERP (Effective Radiated Power), if the output power from the radio is 43 dBm, the cable losses 3 dB, and the antenna gain 14 dBd?????E????(1分)??A.43 dBm??B.26 dBm??C.32 dBm??D.60 dBm??E.54 dBm ??A.FCCH、SCH、BCCH、RACH、PCH。??B.FCCH、SCH、BCCH、AGCH、PCH。??C.BCCH、SDCCH、SACCH、AGCH、PCH。??D.BCCH、SDCCH、FACCH、AGCH、PCH。 【必考题】??以下关于小区全球识别码CGI的描述，哪项是错误的？???d?????(1分)??A.CGI由MCC、MNC、LAC和CI组成；??B.中国的移动国家代码为460，中国电信移动网的移动网络代码为00。??C.CGI在全球范围内是唯一的??D.当移动台在空闲时，它会将所在小区的CGI汇报给BSC 【必考题】??以下关于动态功率控制的描述，哪项是错误的？???c???(1分)??A.动态功率控制是指在通话过程中，MS和BTS的输出功率可以根据两者之间的距离作动态调整。??B.动态功率控制是由BSC来控制的。??C.动态功率控制在整个信号覆盖范围内都可以进行调整。??D.采用动态功率控制，既可以延长手机电池的使用时间，又可以减少无线网络的干扰。 【必考题】??在CME20系统中，克服时间色散的措施是???b?????(1分)。??A.采用跳频技术??B.采用接收机均衡器??C.采用交织技术??D.采用GMSK调制技术 【必考题】??为了克服系统在某些情况下接收不到移动台的关机信号而使系统对已关机的MS进行无效的寻呼，系统采用了隐分离技术，??a????(1分)设置是设置隐分离