set the initial value of the timer that controls the measurement events of the mobile. C.To set the initial value of the timer that controls if handover during signaling is allowed or not. D.To set the initial value of the timer that controls if handover to another BSC is allowed or not. E.To set the initial value of the timer that controls the filtering process.
90. 【必考题】 The purpose of ramping is to avoid handover decisions to a new neighbor based on only
a few samples. What is a common parameter setting for macro cells? E (1分)
A.SSRAMPSI=10 and SSRAMPSD=20 B.SSRAMPSI=20 and SSRAMPSD=10 C.SSRAMPSI=10 and SSRAMPSD=10 D.SSRAMPSI=5 and SSRAMPSD=2 E.SSRAMPSI=2 and SSRAMPSD=5
91. 【必考题】 What is the basic ranking in the Ericsson1 locating algorithm based on? A (1
分)
A.Relative signal strength B.Absolute signal strength C.Minimum signal strength D.Sufficient signal strength E.Quality
92. 【必考题】 What is the difference between BSTXPWR at the “preferred reference point” and the
reported signal strength in the mobile? C (1分)
A.Path loss B.Path loss, minus antenna gain C.Path loss, minus antenna gain, plus feeder loss D.Path loss, minus antenna gain plus feeder and combiner losses E.There is no difference 93. 【必考题】 What is the purpose of setting BSRXSUFF to –150 dBm and MSRXSUFF to 0 dBm in all
cells? D (1分)
A.To make sure that the uplink signal strength influences the basic ranking. B.To enable path loss ranking. C.To ensure that the signal strength on the uplink is always sufficient. D.To obtain an absolute signal strength ranking. E.To disable path loss ranking. 94. 【必考题】 When may the merry-go-round effect occur? C (1分)
A.If TINIT has a low value B.If the hysteresis is too small C.If the offset is non-zero D.If PSSTEMP is set to a low value E.If PTIMTEMP is set to a low value 95. 【必考题】 What is TRHYST used for? B (1分)
A.It modifies the sufficient level condition for neighboring cells. B.It modifies the sufficient level condition for neighboring cells and the serving cell. C.It is used to move the L-L
border. D.It is used to move the K-K border. E.It is used to move both the K-K and the L-L borders. 96. 【必考题】 What is BQOFFSET used for? E (1分)
A.It is used to trigger a bad quality urgency condition. B.It is used as a signal strength offset to penalize cells after a bad quality urgency handover. C.It is used to offset the trigger conditions for a bad quality urgency handover. D.It is used to prevent a new handover attempt in a cell after handover failure. E.It is used to restrict the distance to a candidate cell, if a bad quality urgency condition is triggered.
97. 【必考题】 Cells in the basic ranking list are divided into categories. How many categories are
there, if the serving cell is considered as a category of its own? B (1分)
A.2 B.3 C.8 D.10 E.11
98. 【必考题】 The Figure below shows the outcome from basic ranking. Assuming all cells except D and
H fulfil band and layer thresholds, what cells should be prioritized and in what order? E (1分)
A.A, B, F, G, E, and C B.G, E, B, A, C, and F C.G, E, B, and A D.B, A, F, G, E, and C E.A, B, E, and G
99. 【必考题】 The idle mobile derives an entity called C1. How is C1 used? A (1分)
A.C1 for a particular cell must be larger than zero for a mobile to be allowed to camp on that cell. B.C1 is a quality check and if not fulfilled, the idle mobile must try another cell to camp on. C.C1 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 C1 is chosen to camp on. E.C1 is set to yes, if both CB and CBQ are low.
100. 【必考题】 The idle mobile derives an entity called C2. How is C2 used? D (1分)
A.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. 101. 【必考题】 What is CRH used for? C (1分)
A.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.
102. 【必考题】 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? D (1分)
A.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)
103. 【必考题】 What is one of the differences between the phase 1 and phase 2 establishment
causes? D (1分)
A.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.
104. 【必考题】 Which of the criteria below is not influenced by the value of CHAP? A (1
分)
A.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.
105. 【必考题】 Why can BTS power control be used to increase the capacity (that is, tightening the
frequency re.use in the network)? E (1分)
A.It increases the sensitivity of the mobile B.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.
106. 【必考题】 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: A (1分)
A.6 dB B.10 dB C.12 dB D.20 dB E.30 dB
107. 【必考题】 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”? C (1分)
A.0, 1, 2, 3, 4, 5, and 6 B.1, 2, 3, 4, 5, 6, and 7 C.0, 2, 4, 6, 8, 10, and 1 D.1, 3, 5, 7, 9, 11, and 0 E.0, 3, 6, 9, 1, 4, and 7
108. 【必考题】 What is the result from field measurements of coverage compared with: B (1
分)
A.The design criterion B.The required signal strength C.The required signal strength, plus the log-normal fading margin D.The design criterion, minus the body loss E.The design criterion multiplied by a “probability of coverage” factor
109. 【必考题】 What are event and level counters? A (1分)
A.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.
110. 【必考题】 What is not taken into account when deriving SQI? E (1分)
A.BER B.FER C.HO events D.Speech coder E.Timing advance
111. 【必考题】 What is the normal event that leads to an abnormal disconnection and stepping of
the drop counter? B (1分)
A.Failed decoding of speech frames B.Failed decoding of SAACH frames C.Excessive BER D.Poor signal strength E.Excessive timing advance
112. 【必考题】 If a call is dropped during excessive TA, bad quality and poor signal strength, which
cause counter will step? C (1分)
A.SS drop counter B.Q drop counter C.TA drop counter D.All of these E.None of these 113. 【必考题】 Which of these parameters can affect the SS drop rate? A (1分)
A.BSTXPWR B.BSRXMIN C.BSRXSUFF D.All of these E.None of these
114. 【必考题】 Which drop counter is stepped when a call is disconnected because MAXTA is
exceeded? E (1分)
A.SS drop counter B.Q drop counter C.TA drop counter D.All of these E.None of these 115. 【必考题】 What expression is usually used for the paging success rate? D (1分)
A.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).
116. 【必考题】 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？ C (1
分)
A.PSSHF、PTIMHF B.PSSBQ、PTIMBQ C.PSSTEMP、PTIMTEMP D.PSSTA、PTIMTA
117. 【必考题】 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？ D (1分)
A.-65dBm B.-75dBm C.-85dBm D.-95dBm
118. 【必考题】 下列关于小区内切换的几种说法，哪种是错误的？ A (1分)
A.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。 119. 【必考题】 小区选择C1算法跟以下那个因素有关? C (1分)
A.Rxlev_min(n) B.MS_Txpwr_Max C.Rxlev_Access_Min D.BS_Txpwr_Max
120. 【必考题】 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 (1分)提高
A.T3212 B.Cell_Reselect_Hysteresis C.Cell_Reselect_offset
121. 【必考题】 如果将T3101设置抬高,可能会造成什么影响? A (1分)
A.risk of SDCCH Congestion B.risk of PCH Congestion C.risk of TCH Congestion D.risk of AGCH Congestion
122. 【必考题】 ‘Call Proceding’是在以下哪个过程中被用到? A (1分)
A.MOC B.MTC C.Location Update D.handover
123. 【必考题】 How many ARFCNs can an operator use if allocated 15 MHz uplink and15 MHz downlink
(minus one for guardband)? D (1分)
A.14 ARFCNs B.15 ARFCNs C.29 ARFCNs D.75 ARFCNs E.74 ARFCNs
124. 【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
125. 【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
126. 【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 127. 【必考题】 Reusing frequencies in a cellular pattern (compared to “one big cell”) D (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.
128. 【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
129. 【必考题】 A transmitted signal is received at -50 dBm and there is -150 dBm interference at
the same frequency. What is C/I? E (1分)
A.3 dB B.30 dB C.6 dB D.100 dB
130. 【必考题】 A repeater can be used to: D (1分)
A.Increase the capacity locally (in a traffic hot spot). B.Increase the capacity along
highways. C.Get better coverage on water. D.Get better coverage where the area to be covered is blocked by obstacles. E.For none of these purposes
131. 【必考题】 The wave propagation prediction algorithm 9999 takes a lot into account, but
not: D (1分)
A.Land usage B.Terrain profile C.Curvature of the earth D.Diffraction loss due to obstructing buildings E.Transmitter and receiver antenna effective heights 132. 【必考题】 移动台功率控制带来的好处是： A (1分)
A.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