GMCC备战练习题-4

无线网优练习题四一、单选题（每题1分，共80分）1. 下列关于切换的说明，哪种是错误的？DA.负荷分担引起的切换是一种非正常的切换类型。B.移动台处于微蜂窝覆盖区内并在第二层小区上通话时，当其接收到的1层小区的信号强度高于12层间的门限值时一定会切入1层小区。C.小区内切换在不跳频的情况下可以较好地改善通话质量。D.移动台处于微蜂窝覆盖区内时，当其接收到的1层小区的信号强度低于12层间的门限值时一定会切入2层小区。2. 根据上下行的平衡公式计算，基站最大发射功率是大为？CA.45dBmB.41dBmC.43dBmD.42dBm3. 下列哪些因素能够影响到系统的切换性能？CA.频率及BSIC规划、逻辑信道的映射方案及BA表的长度。B.多层小区间的门限值及逻辑信道的映射方案。C.频率及BSIC规划、多层小区间的门限值及BA表的长度。D.上面三个答案都不对。4. OL与UL小区间的切换由下列哪组参数决定的？CA.BQOFFSET与AWOFFSETB.QLIMDL与QLIMULC.LOL与TAOLD.LOL与TALIM5. 对于BA表的描述，下列哪个是错误的？AA.立即更新方法只用于空闲模式表而默认方法只用于激活模式。B.空闲模式表可取较长而激活模式表尽量短。C.激活模式表最好不要超出16个。D.空闲模式表用于移动台的空闲模式而激活模式表及于移动台的激活模式。6. 关于一层小区的描述，下列哪种说法是不正确的？BdA.第一层小区不论在何种情况下都有最优先的等级。B.当移动台发生差质时将会优先切往一层小区。C.当移动台在一层小区通话时，如果周围没有相邻的一层小区，将会在一定区域内失去选优切换的功能。D.一层小区只用于室内覆盖。7. 对于动态功率控制，下列描述哪个是错误的？DA.参数SSDES用于上行动态功率控制而参数SSDESDL用于下行动态功率控制。B.上行链路的动态功率控制是控制移动台的发射功率。C.下行链路的动态功率控制是控制BTS的发射功率。D.参数INTDES及INTLEN是上下行功态功率控制的初始状态控制参数。8. 下列哪个参数决定话务分担区域？B A.KOFFSETB.RHYSTC.CRHD.BQOFFSET9. 下列关于负荷分担功能的描述，哪种说法是错误的？DA.负荷分担比例可以通过参数RHYST来调整。B.当RHYST=100时容易出现乒乓切换。C.加大KHYST值能够增强负荷分担功能所起的作用。D.加大KHYST值容易出现乒乓切换。10. 下列关于小区内切换的说明，哪种是错误的？DA.小区内切换能够改善系统内的短期干扰对通话质量的影响。B.小区内切换的作用在开启跳频的情况下将会减弱。C.在开启跳频的系统中，突然出现频繁的内切换，可能是由于部分载波出现故障。D.小区内切换可以发生在整个小区的覆盖范围内。11. 如果下列链路的LEVTHR=80，LEVHYST=3，LAYER=1移动台将可能在下列哪个电平上切出一层小区？CA.-65dBmB.-75dBmC.-85dBmD.-77dBm12. 当参数RHYST=70时，缓冲带内有多少区域内的MS能够进行负荷分担？AA.70%B.30%C.170%D.100%13. 下列关于负荷分担功能的描述，哪种说法是错误的？BA.当小区的空闲信道数满足CLSLEVEL的要求时可以向相邻小区转移话务。B.当小区的空闲信道数满足CLSACC的要求时可以向相邻小区转移话务。C.当小区的空闲信道数满足CLSACC的要求可接受分担过来的话务。D.一个小区可以设置成只接收话务而不能向外转移话务。14. 以下关于快速移动的移动台，下列描述哪个是错的？BA.可以通过调整参数SSLENDL来调整其动态功率控制速度使其适应无线环境的要求。B.如果发现在动态功率调整区域内出现切换不成功现象可以调整参数QCOMPDL及参数LCOMPDL来解决。C.如果发现在动态功率调整区域内出现弱信号情况，可以通过增大参数SSDESDL来增大该区域的信号强度。D.如果发现在动态功率调整区域内出现质差的现象，可以通过调整参数QDESDL改善。15. 下列哪个参数对上行链路的掉话率有较明显的影响？AA.RLINKUPB.ACCMINC.MSRXMIND.RLINKT16. 以下关于几种说法，哪个是错的？AA.调整KOFFSET的值可以调整小区的话务，它实质上通过调整基站的EIRP功率来实现的。B.调整KHYST值可以调整两个相邻小区间的切换缓冲区域的大小。C.如果出现乒乓切换，可以通过调整KHYST值来克服。D.如果小区的话务太忙，可以通过调整KOFFSET来转移话务。17. 对于有快速移动台的小区，下列哪种调整方法是不合适的？AA.减小TAAVELEN的值使其适应快速移动的无线环境。B.减小SSRAMPSI的值使其适应快速移动的无线环境。C.减小SSRAMPSD的值使其适应快速移动的无线环境。D.减小SSLENSD的值使其适应快速移动的无线环境。18. 下列几种说法，哪种是错误的？AA.上行链路的切换决定于基站接收到的上行信号强度的大小。B.下行链路的切换决定于移动台接收到的下行信号强度的大小。C.上、下行链路的切换决定于移动台接收到的下行信号强度的大小。D.对于相邻小区，上下行链路的切换决定于移动台接收到的下行信号强度的大小，而对于服务小区来说上下行链路的切换决定于移动台接收到的下行信号强度的大小。19. 上行质差切换门限是由下列哪个参数来设定的？AA.QLIMULB.QOFFSETULC.TALIMULD.QLIMDL20. 是否启用上行L-算法，是由哪些参数来决定的？DA.MSRXSUFFB.BSRXMINC.MSRXMIND.BSRXSUFF21. 逻辑信道的自适应配置是为了解决A信道的拥塞A.SDCCHB.TCH22. 分配到其它小区的特性由两个参数来决定,一个是BSC,另一个是CELL,下列哪一个是关于小区的BA.ASSOCB.AW23. MAIO是为了减小频率干扰的，分为人工配置和缺省配置。哪一种复用形式建议采用人工配置的：CA.1/3B.3/9C.1/124. RHYST这个参数是CA.关于小区切换关系的B.关于滞后区的参数C.是小区负荷分担中来减小滞后区域的参数25. 当我们作TEMS测试时，如果DTX打开的情况下，接收信号场强应设置成哪种模式：BA.FULL SETB.SUB SET26. BTS动态功率控制的一些描述，正确的是：CA.减小手机在低C/I的情况B.减小由于功率太大，接收饱和失真的情况C.计算时要考虑信号场强和质量27. 在locating中，计算小区级别时K-cell和L-cell哪种小区级别较高：BA.K-cellB.L-cell28. 在locating中，我们不仅要考虑小区的接收信号场强，还要考虑信号的损耗（path loss）这是：BA.K算法B.L算法29. 下列哪个参数是与通话挂断原则（disconnection Criteria）相关的：CA.KHYSTB.REGINTC.RLINKT30. The idle mobile derives an entity called C2. How is C2 used?DA.C2 for a particular cell must be larger than zero for a mobile to be allowed to camp on that cell.B.C2 is a quality check and if not fulfilled, the idle mobile must try another cell to camp on.C.C2 and BSIC are reported to the serving cell, at least, once every five seconds to enable network controlled cell re-selection.D.At cell re-selection, the cell with the largest derived C2 is chosen to camp on.E.C2 is set to yes, if both CB and CBQ are low.31. What is CRH used for?CA.It is used in combination with ACCMIN to cater for a layered cell structure in a dual band network.B.It is used as a temporary offset to make a cell appear better during cell re-selection.C.It is used as a hysteresis between location area borders.D.It is used in a limited service state to enable emergency calls.E.It is the maximum number of repeated unsuccessful access attempts.32. An idle mode mobile must read the BCCH data and decode BSIC for the neighboring cells, at least, once during certain time intervals. What are the intervals?DA.Five seconds (BSIC and BCCH data)B.Five seconds (BSIC) and 30 seconds (BCCH data)C.30 seconds (BSIC) and 30 seconds (BCCH data)D.30 seconds (BSIC) and five minutes (BCCH data)E.Five minutes (BSIC) and five minutes (BCCH data)33. What is one of the differences between the phase 1 and phase 2 establishment causes?DA.Phase 2 establishment causes distinguish between answer to paging and call re-establishment.B.Phase 2 establishment causes distinguish between MS originated call and answer to paging.C.Phase 2 establishment causes distinguish between location updating and answer to paging.D.Phase 2 establishment causes distinguish between MS originated calls and SMS.E.Phase 2 establishment causes distinguish between call re-establishment and SMS.34. Which of the criteria below is not influenced by the value of CHAP?AA.Prioritizing of different users or not.B.Immediate assignment on the TCH allowed or not.C.TCH or SDCCH first.D.Overlaid subcell as a last resort or not.E.Phase 1 or phase 2 mobiles.35. Why can BTS power control be used to increase the capacity (that is, tightening the frequency re.use in the network)?EA.It increases the sensitivity of the mobileB.It increases the number of mobiles with high C/I.C.The power consumption in the radio base station is reduced.D.It reduces the risk of MS receiver saturation.E.It reduces the number of mobiles with low C/I.36. If the path loss compensation parameter, LCOMPDL, is set to ten, the down regulation in the BTS output power, due to path loss compensation, is limited to:AA.6 dBB.10 dBC.12 dBD.20 dBE.30 dB37. Assume that there are 12 frequencies (f1-f12) in the hopping frequency set. What default MAIO values are allocated to the first seven TRXs in the cell”?CA.0, 1, 2, 3, 4, 5, and 6B.1, 2, 3, 4, 5, 6, and 7C.0, 2, 4, 6, 8, 10, and 1D.1, 3, 5, 7, 9, 11, and 0E.0, 3, 6, 9, 1, 4, and 738. What is the result from field measurements of coverage compared with:BA.The design criterionB.The required signal strengthC.The required signal strength, plus the log-normal fading marginD.The design criterion, minus the body lossE.The design criterion multiplied by a “probability of coverage” factor39. What are event and level counters?AA.It is the name of the software counters that are stepped in function blocks outside the STS (in RPs and CPs).B.It is the name of the counters of alternative A when they are stored/used in the STS later.C.It is the name of the counters of alternative B when they are stored/used in OSS later.D.Both A and B are correct.E.Both B and C are correct.40. What is not taken into account when deriving SQI?EA.BERB.FERC.HO eventsD.Speech coderE.Timing advance41. What is the normal event that leads to an abnormal disconnection and stepping of the drop counter?BA.Failed decoding of speech framesB.Failed decoding of SAACH framesC.Excessive BERD.Poor signal strengthE.Excessive timing advance42. If a call is dropped during excessive TA, bad quality and poor signal strength, which cause counter will step?CA.SS drop counterB.Q drop counterC.TA drop counterD.All of theseE.None of these43. Which of these parameters can affect the SS drop rate?AA.BSTXPWRB.BSRXMINC.BSRXSUFFD.All of theseE.None of these44. Which drop counter is stepped when a call is disconnected because MAXTA is exceeded?EA.SS drop counterB.Q drop counterC.TA drop counterD.All of theseE.None of these45. What expression is usually used for the paging success rate?DA.Successful repeated page attempts (in location area) of total number of first and repeated page attempts (in location area).B.Successful repeated page attempts (in location area) of total number of repeated page attempts (in location area).C.Rate of discarded paging messages in the BSC.D.Successful first and repeated page attempts (in location area) of total number of first page attempts (in location area).E.Successful first and repeated page attempts (in location area) of total number of first and second page attempts (in location area).46. What is ICDM?BA.Intra-Cell Downlink MeasurementsB.Inter Cell Dependency MatrixC.Interference Combined with Downlink MeasurementsD.Internal Cell Disturbance MeasurementsE.Interfered Cell Disturbance Matrix47. What is TET used for?EA.For automatic updates of the networkB.To perform measurements of the percentage of interfered trafficC.To predict the traffic distribution in the futureD.To find the right frequenciesE.To find the right hot-spot location48. 为避免快速移动的移动台切入覆盖范围不大的微蜂窝，可调整下列哪组参数？CA.PSSHF、PTIMHFB.PSSBQ、PTIMBQC.PSSTEMP、PTIMTEMPD.PSSTA、PTIMTA49. 如果下列链路的LEVTHR=90，LEVHYST=3，移动台将可能在下列哪个电平上切出一层小区？DA.-65dBmB.-75dBmC.-85dBmD.-95dBm50. 下列关于小区内切换的几种说法，哪种是错误的？AA.在每个小区中，小区内切换所能够进行的次数是由参数MAXIHO定义的，切换超过这个数值后将不能进行切换。B.小区内切中有TINIT、TIHO及TMAXIHO三个计数器。C.计数器TINIT是两次小区内切换发生的最小时间间隔。D.当TMAXIHO计满后小区内切要在TINIT+TIHO计满后才能发生。51. 小区选择C1算法跟以下那个因素有关?CA.Rxlev_min(n)B.MS_Txpwr_MaxC.Rxlev_Access_MinD.BS_Txpwr_Max52. 为避免因过多跨越LAC的小区重选而造成的SDCCH的阻塞,我们将与该小区有切换关系且与之LAC不同的相邻小区B提高A.T3212B.Cell_Reselect_HysteresisC.Cell_Reselect_offset53. 如果将T3101设置抬高,可能会造成什么影响?AA.risk of SDCCH CongestionB.risk of PCH CongestionC.risk of TCH CongestionD.risk of AGCH Congestion54. Call Proceding是在以下哪个过程中被用到?AA.MOCB.MTCC.Location UpdateD.handover55. How many ARFCNs can an operator use if allocated 15 MHz uplink and15 MHz downlink (minus one for guardband)?DA.14 ARFCNsB.15 ARFCNsC.29 ARFCNsD.75 ARFCNsE.74 ARFCNs56. 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?BA.22B.44C.8D.3E.4657. 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?BA.22B.44C.8D.3E.4658. What cell property is limited by timing advance?CA.Number of simultaneous callsB.Frequency of call setupsC.RadiusD.Antenna lengthE.Color59. 移动台功率控制带来的好处是：AA.延长移动台的电池使用时间B.获得更好的Bit Error Rate(BER)C.获得更高的接收信号强度D.获得更好的话音质量60. SSDESDL的取值是BA.下行信号的最终电平值B.与LCOMPDL一起作用决定下行信号信号的调节幅度C.上行信号强度的期望值D.定位算法中的罚值61. 动态功控中的SSLENDL=6，表示CA.滤波器的长度为6秒B.每6个SACCH周期便有1个结果输出C.滤波器长度为6个SACCH周期D.滤波器类型为第6种类型62. A的小区禁止PHASE 2 手机起呼.A.CBQ=HIGH， CB=YESB.CBQ=LOW， CB=NOC.CBQ=HIGH， CB=NOD.CBQ=LOW， CB=YES63. 小区重选适用于B手机A.PHASE 1B.PHASE 1 & PHASE 2C.PHASE 2D.CLASS 564. 处于层1的移动台，当RXLEVs=A时可以执行向层2的切换.A.LEVTHRs+LEVHYSTsB.LEVTHRs-LEVHYSTsC.LEVTHRsD.LEVHYSTs65. IDLE BA与ACTIVE BA中哪个与切换关系有关BA.IDLE BAB.ACTIVE BAC.两者都有关D.两者都无关66. 动台在空闲状态下的小区选择和重选是由网络实体 D 来决定的？A、MSC B、BSC C、BTS D、MS67. 移动台在通话状态下的切换是由网络实体 B 来决定的？A、MSC B、BSC C、BTS D、MS68. 小区内切换将在 A 的情况下发生。 A、强信号质差； B、弱信号质差； C、AW=ON时； D、小区拥塞时。69. 有效地改善以下哪种现象？ C A、单通； B、阴影衰落； C、多径衰落； D、互调干扰。70. 区禁止PHASE 2 手机起呼.A、CBQ=HIGH， CB=YES； B、CBQ=LOW， CB=NO； C、CBQ=HIGH， CB=NO； D、CBQ=LOW， CB=YES。71. 周期位置更新的主要作用是 D ： A、防止对已正常关机的移动台进行不必要的寻呼。 B、定期更新移动用户的业务功能。 C、防止移动台与网络失步。 D、防止对已超出信号覆盖范围或非正常掉电的移动台进行不必要的寻呼。72. 在切换过程中，目标小区的选择是由哪个网络实体决定的 A ： A、全部由BSC决定； B、全部由MSC决定； C、同一BSC内由BSC决定，不同BSC之间由MSC决定； D、同一BSC内由MSC决定，不同BSC之间由BSC决定；73. 下列哪些因素能够影响到系统的切换性能： C A、频率及BSIC规划、逻辑信道的映射方案及BA表的长度。B、多层小区间的门限值及逻辑信道的映射方案。C、频率及BSIC规划、多层小区间的门限值及BA表的长度。D、上面三个答案都不对。74. 在CME20系统中，克服时间色散的措施是 B 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75. 由于基站到移动手机之间的障碍物的阻隔造成的信号阴影可由哪种数学模型说明：B 。 A、路径衰落 B、对数正态衰落 C、瑞利衰落76. 有多个用户在一个小区中上GPRS，在小区GSM话务较繁忙有轻微拥塞的情况下以下哪种操作能较明显的改善用户上网的速度？D A、将TBFLIMIT设小点 B、将TBFLIMIT设大点 C、改变PDCHALLOC方式 D、增加FPDCH数 77. 以下关于分配到其他小区（Assignment to Another Cell）的描述，哪项是错误的？ B A、分配到其他小区功能是应用在分配TCH时的 B、分配到其他小区是指移动台的空闲状态时通过运算自身的定位算法选出一个比当前小区更好或更差的小区用于建立呼叫 C、分配到更好小区可以提高通话质量 D、分配到更差小区可