C、AG D、TMSI E、IMSI
33、The number of MS that can be paged with one paging message depends on? （ D ）
A、paging groups per multiframe B、MFR C、AG
D、TMSI or IMSI paging
34、In idle mode, the network will page a subscriber within which area(s)? （ AB ）
A、MSC B、LA C、BSC D、BTS
35、What if the queuing time is longer than the time allowed for DR to be performed and the call cannot be handed over from the SDCCH of the serving cell to a target cell TCH during the DR period? （ A ）
A、The BSC discontinues the call set up procedure B、The queuing will go on till timer expires
36、A MS is connecting to S_Cell currently, and measured downlink signals from the surrounding cells as following table:
plmnPermitted BSIC rxLevMinCell HoMarginPBGT AV_RxLev_DL S_Cell N_Cell1 N_Cell2 2 20 41 22 N_Cell3 43 -90 dBm 4 -87 dBm N_Cell4 N_Cell5 22 -90 dBm 4 -88 dBm 25 -90 dBm 4 -92 dBm -90 dBm -90 dBm 6 6 -93 dBm -85 dBm -87 dBm With the above BTS and Adjacent cell parameters, BSC will trigger power budget handover to which cell? （ D ）
A、N_Cell1 B、N_Cell2 C、N_Cell3 D、N_Cell4 E、N_Cell5
37、What is/are possible solutions to speed up power budget handover decision? （ CD ）
A、To reduce averaging window size B、To reduce px/nx values C、To reduce hoPeriodPBGT D、To reduce hoMarginPBGT
38、If the plmnPermitted (0-7) is not defined in accordance with the NCC used, what’s true? （ B ）
A、The MS cannot access network
B、The MS will not report the measurement of that PLMN C、The MS will not measure that PLMN D、The MS cannot perform location update
39、When the power budget handover can only happens between cells of the same size/layer? ( CD )
A、AdjCellLayer is enabled B、multiBandCell
C、Power budget handover is enabled D、Umbrella handover is enabled
40、If SDCCH blocking due to location updates on location area border, which is/are not possible solution(s)?( AE )
A、FACCH call setup B、Dynamic SDCCH assignment
C、Configure more time slot for SDCCH D、Increase cellReselectHysteresis E、Directed Retry
41、Which is correct for NoOfMultiframesBetweenPaging (MFR)? ( CD )
A、The higher the MFR, the bigger the paging capacity B、The higher the MFR, the smaller the paging capacity C、Higher MFR can reduce MS power consumption D、Higher MFR can increase paging buffer size E、MFR has no effect in idle mode operaton
42、For non-combined BCCH, what is the maximum number of pages in a second with noOfBlocksForAccessGrant (AG)=2? ( A ) A、119 B、34 C、104 D、26
43、Which will be affected by Location Area design? （ AC ）
A、Cell specific SDCCH blocking B、Cell specific TCH blocking C、Paging successful rate D、Paging buffer size
44、For combined BCCH, what is the paging buffer size of a BTS with MFR=6, AG=1? （ D ）
A、432 B、384 C、144 D、96
45、Which is not the type of location update? （ C ）
A、Normal B、IMSI Attach
C、IMSI Detach D、Periodic Registration
46、Paging successful rate can be improved by? ( ABC )
A、Location area design
B、Location area code allocation C、Reduce timerPeriodicUpdateMS (PER) D、Increase AG
47、If two or more criteria for a handover are present simultaneously, which one has the top priority? ( F )
A、Uplink quality B、Turn-around-corner MS C、Rapid field drop D、Downlink quality E、Uplink level
F、Interference (uplink or downlink) G、MS-BS distance (maximum or minimum) H、Better cell (Power budget or Umbrella)
48、Target cell evaluation for a MS connecting to Cell A. Two cells are reported: Cell B=-85 dBm, Cell C=-95 dBm. Both cells have the same settings as following:
btsLoadThreshold=80% hoLevPriority =3 hoLoadFactor=2
rxlevmincell (n)=-92 dBm.(Cell A —>Cell B, Cell A —>Cell C) ,
the TCH load is Cell B=90%, Cell C=70%, which cell is the best candidate? ( A ) A、Cell B B、Cell C
49、When perform inter BSC handover, the BSC send “Handover Required” message to MSC, genHandoverRequestMessage=3 means? ( C )
A、Handover required message could be repeated for 3 times
B、There are 3 handover required messages were sent
C、3 preferred cells are included in the Handover required message D、A handover required message contains 3 handover requests message 50、Which is/are wrong for Directed Retry function? ( BCD )
A、mintimelimitdirectedrety defines the period which the target cell evaluation
for the Directed Rety is not allowed
B、mintimelimitdirectedrety defines the maximum period which the target cell
evaluation for the Directed Rety is allowed
C、Directed Retry triggers when the BTS load over btsLoadThreshold D、Inter BSC Directed Retry could never happen
51、If drMethod=1, which parameter is/are involved in target cell evaluation for DR? ( AC )
A、rxLevMinCell B、HoMarginPBGT C、drThreshold D、hoLevelUmbrella
52、If downlink signal is AV_RxLev=-96 dBm, and hoThresholdsLevDL=-92 dBm, hoMarginLev=3 dB, the minimum requirement for a candidate cell to trigger level handover is? ( B )
A、 > -96 dBm B、 > -93 dBm C、 > -92 dBm D、 > -89 dBm
53、A cell observes high TCH raw blocking, what could alleviate the blocking rate? ( AC )
A、Increase rxLevMinCell (SL) for the incoming adjacent cell relations B、Decrease rxLevMinCell (SL) for the incoming adjacent cell relations C、Increase BTS rxLevAccessMin (RXP) D、Decrease BTS rxLevAccessMin (RXP)
54、When drive test with TOM, the BSIC=20 means （ C ）。
A、NCC=2, BCC=0 B、NCC=1, BCC=6 C、NCC=2, BCC=4
三、是非题（）
1. GSM系统信道采用双频率工作，一个发射，一个接收，这种信道我们称之为双工信道，其收
发频率间隔称之为双工间隔，GSM900的双工间隔为95MHZ。（ 错）（2级） 2. GSM移动台分为移动台设备（ME）和用户识别模块（SIM）组成。 （对 ）（2级） 3. 在GSM系统中，采用回波抑制设备是为了消除PSTN的二/四线转换所带来的回波干扰。（对 ）
（2级）
4. 移动识别码IMSI不小于15位。（错）（2级）
5. 一个PLMN区可以由一个或几个服务区组成。（错）（2级）
6. TMSI是由HLR分配的临时号码，它在某一MSC区域内与IMSI唯一对应，TMSI的32位比特
不能全为一。（ 错）（2级）
7. LAI由MCC+MNC+LAC组成，LAC是个两字节的十六进制的BCD码，也就是说有四位十六进制
数字组成，它不能使用0000和FFFF。（对 ）（2级）
8. BSIC用于移动台识别相邻的、采用相同载频的、不同的基站收发信台，特别用于区别在不
同国家的边界地区采用相同载频的相邻BTS。（ 对）（2级）
9. 传线传播模型Walfish- Ikegami Model 适用于城郊大范围的环境。(错) （2级） 10. 直放站的基本原理是通过重发天线接受基站下行信号,经主机放大,从施主天线发射到目标
覆盖区。(错) （2级）
11. 直放站在安装调试时,一般应使下行增益=上行增益。(对) （2级） 12. 当RXQUAL为1级时,相对应的BER范围是0.2---0.4%。(对) （2级）
13. Are NMS performance measurements better than Field Test measurements? （错）不存
在那一种方法比另一种好的问题，它们各有优缺点，互相补充。
14. Intratalk基站,Flexitalk基站,Citytalk基站都属于NOKIA Talk系列。(对) （2级） 15. Citytalk 基站容量比Flexitalk大。(对) （2级）
16. RTC合路器既能用于射频跳频,又能用于基带跳频。(错) （2级）
17. 所有的小区都必须配置SDCCH或使用MBCCHC。（错）只供切换接入的MICRO可以不需配备
SDCCH）（2级）
18. 一个BSC可以有多个LAC。( 对 ) （2级）
19. 一个LAC可以同一MSC下的不同BSC中。（对）（2级） 20. 一个LAC可以在任何不同BSC中。（错）（2级）
21、在双向数据传送中，上行和下行分别用不同的TBF。(对) ③ 22、同一基站中RTCC和AFEA（C）可以共用。（对） （2级）
四、简答题（）