A.BCCH B.SACCH C.SDCCH
93. 在小区选择中，MS至少在5Min内对 A 个最强的非服务小区的BCCH载波进行
BCCH数据块的解码。 A.6 B.5 C.4 D.7
94. “CHANNEL REQUEST”这个消息是在 A 信道上发送的。
A.RACH B.AGCH C.PACH D.SDCCH
95. 在切换中，“HANDOVER PERFORMED”这条消息是从 D 的。
A.MSC发向BSC B.BSC发向MSC C.MS发向BSC D.BSC发向MS 96. 移动台在下列哪种情况下开始可以进行切换？
A.移动台切换到AGCH时。 B.移动台切换到TCH时。 C.移动台切换到SDCCH时。 D.移动台完成分配后。
97. The information contained in one timeslot on the TDMA frame is called a B
A.traffic channel B.burst C.control channel
98. The A-ter interface is used between these 2 nodes: C
A.BSC-BTS B.MSC-BSC C.TRC-BSC 99. Transceiver Handler (TRH) is used for A
A.LAPD signalling B.Encoding and decoding of speech and rate adaptation of data C.Switching of bits rates lower than 64kb/s 100. 以下关于切换的描述，哪个是错的？ B
A.从高层的小区切向低层小区的切换具有最高优先等级。 B.当移动台在通话质差很严重时会出现质差切换。 C.在设置正常的系统中，大部分切换是使移动台切往通话质量较好的小区。 D.两次切换间的最小时间隔间是可以定义的。
101. The SS7 signaling is made up of a Massage Part(MTP)and a number of
User/Application Parts(UP). What User or Application Part is used for signaling between the BSC and the MSC in the GSM network? B A.MAP B.BSSAP C.OMAP
102. The MS is paged on an incoming call in all cells within a C
A.PLMN B.MSC/VLR Service Area C.Location Area 103. Where is paging initiated? C
A.BSC B.BTS C.MSC
104. What part was added to the MTP in the SS7 signaling system to enable it to support
connection-orientated and connection-less signaling? A A.ISUP B.TCAP C.SCCP
105. The interface between MSC and the BSC in know as B
A.A-interface B.A-bis-interface C.B-interface
106. Which of the following effects the size of a cell? A
A.The type of BSC that the BTS is connected to B.Timing Advance C.Number of cells in a cluster
107. Which of the following groups of cells would be most likely to be used in a city
area? B
A.Umbrella, Micro and Pico B.Omnidirectional, Sector and Overlaid C.Underlaid, Overlaid and Omnidirectional
108. Which logical channel transmits the BSIC of a cell? B
A.BCCH B.SCH C.RACH
109. Where are measurement report, which determine handover of a call, carried out? A
A.BSC and MS B.MS and BTS C.MS and MSC
110. The MS is close to the cell border defined by the Timing Advance. The BSC compares
the current average value of TA to the defined value Timing Advance LIMit(TALIM). If TA exceeds the limit, what happens? A
A.An attempt is made to handover the call to a neighbouring cell B.An intracell handover takes place C.The TALIM is increased until a handover can be effected 111. The maximum Timing Advance(TA) allowed in GSM is? B
A.63 bit periods B.128 bit periods C.2048 bit periods
112. Which unit performs LAPD concentration and multiplexing?
A.GS B.TRAU C.SRS
113. Intracell Handover involves? A
A.Change of timeslot only B.Change of frequency only C.Change of timeslot and/or change of frequency
114. The normal cell maximum radius for GSM is? A
A.35km B.70km C.50km
115. Which of the following types of signals would carry the information: “Location
Updating Request”? B
A.Initial MS Message B.BSSMAP C.DTAP
116. Which unit is used for the transcoding of speech information? A
A.TRAU B.TRH C.TRX 117. What is a MO? C
A.A logical representation of software in the BTS B.A logical representation of hardware units in the BTS C.A logical representation of hardware units and software in the BTS 118. Which of the following statements is incorrect? B
A.One TG consists of up to 16 TRXs B.One TG can be connected to a maximum of 32 cells C.A cell can be connected to one only
119. The two different types of multiframes are? B
A.13-and 26-frame B.26-and 51-frame C.51-and 102-frame 120. When a MS is powered on what happens? B
A.The MS scans the radio frequencies of the network B.The mobile scans the frequencies carrying the BCCH channels only C.The mobile scans the frequencies, carrying the BCCH channels, of the neighbouring cells only
121. CALL CONFIRMED is a signal sent from the MS to the MSC for the purpose of? A
A.Responding to SETUP signal from the MSC B.Responding to the AUTHENTICATION REQUEST signal from MSC C.Responding to the PAGING COMMAND from the MSC
122. Which of the following is used by the BTS and MS in providing security for the speech
and data over the air interface? B A.K1 B.Kc C.SRES
123. The subsystem that id concerned with the PCM links is? B
A.RCS B.RTS C.TAS
124. he following: Normal, IMSI Detach, IMSI Attach, Periodic Registration are all forms
of A
A.Location Updating B.Authentication C.Paging
125. Which of the following is false regarding Location Areas? C
A.One Location Area can belong to several BSCs B.One Location Area can belong to several MSCs C.One Location Area is always handle by only one MSC 126. Why is TMSI used? B
A.As a temporary personal code to access the network B.For security reasons C.For use with a rented mobile telephone
127. Which of the following channels operation in bit-stealing mode? C
A.SDCCH B.SACCH C.FACCH
128. Timers are used for Periodic Location Updating. Where are these timers located? B
A. MS and MSC B. MS and BSC C. BSC and MSC 129. The Cell Identity is unique to? C
A.The location Area B.The MSC/VLR Service Area C.The PLMN
130. How many traffic channels can maximum be handled by a TRX? C
A.1 B.4 C.8
131. How many TS are required on the Abis interface per TRX if LAPD C
A.2 B.2.25 C.3
132. How many TSs and E1s are required to connect the following access network to a BSC
when a DXC is used to get maximum utilization of the E1s? Access network with 30 sites of type 3/3/3 and 20 sites of type 2/2/2. LAPD-multiplexing and LAPD-concentration is used. C
A.870 TSs, 29 E1s B.848 TSs, 28 E1s C.780 TSs, 26 E1s
133. Is flat, meshed network architecture best used in small, large or medium networks?
A.Small B.Medium C.Large
134. How many physical connections are required in a network with 10 MSCs in a flat fully
meshed network and in a hierarchical transit network with two transits?
A.100 (meshed), 10 (transit) B.45 (meshed), 20 (transit) C.100 (meshed), 20 (transit) 135. A link set has three signaling links, on which load sharing is used and the maximum
load per signaling link is 30%. What will be the maximum signaling volume that can be carried on this link set?
A.192 kbit/s B.57,6 kbit/s C.51,2 kbit/s
136. What is the difference between message transfer on a) MTP and b) SCCP level in
STP?
A.a) GTT is in STP, b) no GTT in STP B.a) no GTT in STP, b) GTT in STP C.no difference
137. Calculate the signaling volume generated on the A interface in the PLMN shown below Input data: 50 000 subscribers, traffic per subscriber is 25mE, MHT = 100 s, number of location updates=1 per/subscriber/busy hour, octets/call (to BSC/TRC)=270, octets/call (from BSC/TRC) = 280, octets/location updating (to, BSC/TRC) = 130, octets/location updating (from BSC/TRC) = 87. A.79,1 kbit/s B.42,4 kbit/s C.41,4 kbit/s
138. Which of the following is not a valid SDCCH configuration? A
A.SDCCH/4 combined with CCCH on timeslot one B.SDCCH/4 including CBCH combined with CCCH on timeslot zero C.SDCCH/8 non-combined on timeslot zero D.SDCCH/8 including CBCH non-combined on timeslot one E.SDCCH/8 non-combined on timeslot one
139. What does this user formula calculate? E
A.TCH assignment success rate B.TCH availability C.TCH channel utilization D.TCH traffic level E.TCH mean holding time
140. What is a probable cause of random access failure? A
A.MAXTA exceeded B.TALIM exceeded C.Congestion on the SDCCH D.All of these E.E) None of these 141. AUC是用于 B
A.对用户的合法身份做鉴权。 B.产生鉴权和加密所必需的三参数组。 C.用于保存所有用户的数据。 D.用于保存所有移动设备的系列号。 142. SCH用于向移动台发送 C 信息。
A.频率校正信息 B.功率控制及时间提前量 C.TDMA帧号和BSIC D.系统信息 143. 移动台要发起呼叫时第一个使用到的逻辑信道是 D
A.FCCH B.BCCH C.SDCCH D.RACH 144. 下面哪种信道既有上行也有下行。 B
A.PCH B.SDCCH C.BCCH D.AGCH
145. 移动台在同一MSC下的切换由 C 决定。
A.MS B.MSC C.BSC D.BTS
146. 位置区是指用于 C 呼寻MS的区域，也是MS发生位置登记的区域。
A.VLR B.HLR C.MSC D.BSC
147. 在逻辑信道的分类中， D 不属于广播信道（BCH）。
A.同步信道（SCH） B.频率校正信道（FCCH） C.广播控制信道（BCCH） D.寻呼信道（PCH）
148. What is used to prevent ?ping-ponging? , that is, rapid, successive handovers? B
A.Discontinuous Transmission B.Hysteresis C.Dynamic Power Control D.Frequency Hopping E.Cell Load Sharing
149. Where are measurement reports, which determine handover of a call,carried out? B
A.BSC and MS B.MS and BTS C.MS and MSC D.TEMS and MS E.OSS and MS
150. How often is a complete measurement report transmitted from the MS to the
BSC? C
A.Every 60 s B.Every 128 ms C.Every 480 ms D.Every 960 ms E.Every 480 ms or 960 ms
151. Blocking supervision measurements take place every A
A.100 sec B.90 sec C.60 sec D.30 sec E.25 sec
152. How many TRXs can the Ericsson BSC support? D
A.128 B.256 C.512 D.1020 E.1024
153. Which of the following Bursts has the longest Guard Period? B
A.Synchronization Burst B.Access Burst C.Normal Burst D.Dummy Burst E.Frequency Correction Burst
154. Which channel transmits the Location Area Identity? B
A.PCH B.BCCH C.RACH D.SCH E.FCCH
155. Which of the following is false regarding Location Areas? B
A.One Location Area can belong to several BSCs B.One Location Area can belong to several MSCs C.One Location Area is always handled by only one MSC D.Several Location Area can be handled by one BSC E.Several Location Area can be handled by one MSC
156. is it possible to change the BCCH frequency without halting the Cell n Ericsson
R8? C
A.No, only possible for the TCH B.Yes, but a BTS technician must be on site to assist with the OMT. C.Yes D.Yes, but the condition is that there are no traffic in the cell. E.Yes, but the condition is that there are no half-rate traffic in the cell 157. 如果一个网络运营商分别有15 MHz的上、下行频宽，那么他可以获得多少个GSM
频点 (减去一个保护频点)? D A.600 B.599 C.75 D.74
158. 由于阻挡物而产生的类似阴影效果的无线信号衰落称为： C
A.多径衰落 B.快衰落 C.慢衰落 D.路径衰落 159. 1毫瓦与1瓦约相差多少? B
A.20 dB B.30 dB C.1000 dB D.100 dB
160. 以下哪个现象不存在模拟网，而只存在于数字无线网中? D
A.瑞利衰落 B.拥塞 C.快衰落 D.码间干扰 161. 什么是system balance? D
A.每个小区可以承载相同数目的用户 B.网络可以支持不同class的移动台 C.所有的BTS的发射功率都是同样大小的 D.MS与BTS都在满足其接收灵敏度的条件下工作 162. 无线信号在自由空间的衰落情况是：传播距离每增大一倍，信号强度减小 C
A.2dB B.3dB C.6dB D.9dB 163. 1W= C dBm
A.10 B.20 C.30 D.33
164. 掉话次数是如何计算的？A：无线掉话 B：BSC间切换掉话 C：BSC内切换掉话 D：
小区内部切换掉话， 请从下列公式中选择: B A.A-(B+C+D) B.A+B+C+D C.A+B D.A+D 165. 对于GSM系统，手机在通话状态中每 B s向网络提供一次测量报告，其中包含
了 B 个TCH复帧
A.480、21 B.480、4 C.3.69、21 D.3.69、4 166. 下面对跳频的描述， B 是正确的
A.跳频方式与硬件无关 B.基带跳频中除BCCH载波外，其它载波的TS0都参与跳频. C.随机跳频方式中的频点变化无规律性. D.CDU-D可以支持混合跳频方式 167. 下列哪种系统信息不用于IDLE MODE C
A.类型1 B.类型3 C.类型5 D.类型2
168. OVERLAID 小区中不用配置下列 A 信道?
A.BCCH B.SDCCH C.SACCH D.TCH 169. 小区内切发生中 A 情况下;
A.强信号质差 B.弱信号质差 C.AW=ON时 D.小区拥塞时 170. 基带跳频与混合跳频的区别是 B
A.配置频点与载波设备的数量关系不同 B.CDU型号要求不同 C.克服多径衰落的方式不同 D.空中寻址方式不同
171. 下列哪个数据不必向MS广播
A.RLINKT B.RLINKUP C.T3212 D.BTDM 172. 当频点数大于载波数时， A
A.基带跳频可以执行， 混合跳频可以执行. B.基带跳频不可以执行， 混合跳频可以执行. C.基带跳频可以执行， 混合跳频不可以执行 D.基带跳频不可以执行， 混合跳频不可以执行.
173. 修改基站载波功率时，相关的数据有哪些 A
A.BSPWRB BSPWRT BSPWR BSTXPWR B.BSPWRB BSPWRT C.BSPWR BSTXPWR D.BSPWRB BSPWRT BSPWR BSTXPWR MPWR 174. 在空闲模式下，MS通过什么算法进行小区选择. C
A.K算法 B.L算法 C.C1算法 D.LOCATION算法 175. 在通话过程中，当MS发生越区切换时， B
A.切换后立即发生位置更新 B.通话结束后才进行位置更新 C.MSC/VLR先进行更新，通话结束后MS才更新SIM中的位置区信息 D.不必进行位置更新
176. 已知a,b两点的绝对电平为Pa=–5dB, Pb=5dB.则两点的相对电平Pba为 A
A.10 dB B.–10db C.0Db D.5dB
177. 采用分集接收主要是为了解决：. C
A.一副天线接收信号太弱的问题 B.提高天线接收灵敏度 C.克服多径衰落 D.以上三项都错
178. 采用分集接收技术，对 A 有较大的改善。
A.上行链路信号 B.下行链路信号 C.上行与下行链路信号 D.以上都不正确 179. What is the name of the type of fading which is due to shadowing? D
A.Multipath B.Atmospheric fading C.Rayleigh fading D.Log-normal fading E.Path loss
180. Which logical channel must be dimensioned for each cell when considering the
frequency of call setups? C
A.SACCH B.FCCH C.SDCCH D.SCH E.BCCH
181. A subscriber makes a two minute call and a four minute call during the busy hour. How
much traffic does he generate for that hour? C
A.10 millierlangs B.50 millierlangs C.100 millierlangs D.200 millierlangs E.0.4 erlangs
182. What is the advantage of using DTX for an MS? A
A.Increases battery life B.Better Bit Error Rate (BER) C.Higher received signal strength D.Increased bit rate E.Better voice quality 183. What does locating mean? B
A.Paging of a mobile in more than one cell B.Best cell selection C.Changing of cell parameters D.Roaming E.Tuning
184. 以下关于位置区（LA）和BSC/MSC的说法哪个正确？ A
A.一个LA可由属于不同BSC的小区（CELL）构成 B.一个LA可由属于不同MSC的小区（CELL）构成 C.一个LA只能由属于同一BSC的小区（CELL）构成
185. GSM系统中时间提前量（TA）的一个单位对应空间传播的距离大约为 C 米？
A.450 B.500 C.550
186. 以下哪种与时间相关的信息用于无线空间的信号加密？ B
A.呼叫时长 B.TDMAframenumber C.呼叫起始时刻 187. BSC的哪个单元负责处理定位测量数据 A
A.TRH B.TRAU C.CP
188. GSM小区（CELL）的发射半径控制在35公里内的主要由哪种因素决定 A
A.时隙定位的问题 B.频率复用方式 C.输出功率不允许超过40W 189. 每个基站中都装配两个接收天线的原因是 C
A.增强发射信号强度 B.互为备份 C.增强接收信号强度 190. 以下哪个逻辑信道移动用户用于联接系统？ C
A.寻呼信道（PCH） B.广播信道（BCCH） C.随机接入信道（RACH） D.TS2 191. 测量结果通过哪种逻辑信道传回基站？ B
A.SDCCH B.SACCH C.TCH
192. RAND，Kc和SRES的组合的英文名称为 B
A.Mobile number group B.Triplet C.Triplegroup