2024年3月9日发(作者：功鸿志)
最新整理
1. What is a Logical Channel?
因为一个物理信道有多个任务必须完成，它就被分成逻辑信道。逻辑信道就是在某
个特定时刻完成某种信令或控制功能的的时隙的名称。
2. Describe the difference between site and cell
___SITE通常指一个站点，它可能包括多套设备900和1800，一个SITE包含有一个到多个的CELL(扇
区)。一个CELL(扇区)通常指一幅天线覆盖下的同一范围。
_______________________________________________1p
3. What are the five main phases in network planning?
1p
所有相关信息的收集，根据容量和覆盖的要求度量出网络的大小，基站位置的选
择，预定地点的勘测，使用计算机辅助设计系统进行系统预测、干扰分析和频率规
划。 2.5p
4. What is a deciBel (dB)?
它是一个以10为底的对数，是一个相对值，功率 dB=10LOG(x/y)
=20LOG(X/Y)
1p
，场强
5. 10 W power equals (circle your choice)
a) 40 dBm b) 33 dBm c) 30 dBm. 1p
6. Why do we need to tune all propagation models?
必须对传播模型的各个系数进行微调，才能符合当地无线情况
1p
7. Name five diversity methods.
空间分集-主分集收发天线、频率分率—跳频、时间分集—交织，极化分集—极化
天线、多径分极—均衡器
2.5p
8. Which one of the following is not an interference source?
a) multipath signal b) same frequency re-use c) power control.
9. Which of the following are features that reduce the co-channel interference?
a) FH b) DTX c) TRX d) TU50 e) IUO f) PC g) MHA 2p
1p
10. Write the definition of Erlang (Erl)
Erl=所有用户通话时间之和（秒）/3600（秒）
1p
11. What is the difference between Erlang B and Erlang C?
.
最新整理
爱尔兰C表考虑了排队的情况
1p
12. Slow fading margin is (circle your choice/s)
a) an additional path loss due to shadowing
b) a value needed in area location probability calculations
c) not needed in network planning. 1p
13. Location probability means
a) the probability of a mobile being at a certain location.
b) the probability of having a certain field strength level at a location. 1p
14. A typical ‘outdoor coverage’ threshold (900 MHz) is
a) - 50 dBm b) - 75 dBm c) - 95 dBm d) - 102 dBm. 1p
15. Signal measurements are needed for (true/false)
_T__ model tuning & site candidate evaluation.
_F___ functional testing of sites after comissioning.
_T_ performance measurements of the network.
_F___ blocking probability evaluations. 2p
16. What is a Hot Spot?
1p
17. Are the following statements true or false:
_F___ Building penetration loss is a always 7 dB.
__F__ Street channel effect causes signal degradation in tunnels.
__F__ The regular and super layers' cell ranges are equally big in IUO.
__T__ Power budget handover is done, if a MS detects a stronger signal in a neighbour cell.
__T__ A mature network is normally capacity dependent.
__F__ Radio network planning is fun and not difficult at all. 3p
18. Answer the following:
Yes No
I know these things quite well already
I know some of these things already
I know almost nothing about these things so far
I am an experienced network planner
.
最新整理
I will be an experienced network planner
I would like to see demonstrations of the network planning tools
.
2024年3月9日发(作者：功鸿志)
最新整理
1. What is a Logical Channel?
因为一个物理信道有多个任务必须完成，它就被分成逻辑信道。逻辑信道就是在某
个特定时刻完成某种信令或控制功能的的时隙的名称。
2. Describe the difference between site and cell
___SITE通常指一个站点，它可能包括多套设备900和1800，一个SITE包含有一个到多个的CELL(扇
区)。一个CELL(扇区)通常指一幅天线覆盖下的同一范围。
_______________________________________________1p
3. What are the five main phases in network planning?
1p
所有相关信息的收集，根据容量和覆盖的要求度量出网络的大小，基站位置的选
择，预定地点的勘测，使用计算机辅助设计系统进行系统预测、干扰分析和频率规
划。 2.5p
4. What is a deciBel (dB)?
它是一个以10为底的对数，是一个相对值，功率 dB=10LOG(x/y)
=20LOG(X/Y)
1p
，场强
5. 10 W power equals (circle your choice)
a) 40 dBm b) 33 dBm c) 30 dBm. 1p
6. Why do we need to tune all propagation models?
必须对传播模型的各个系数进行微调，才能符合当地无线情况
1p
7. Name five diversity methods.
空间分集-主分集收发天线、频率分率—跳频、时间分集—交织，极化分集—极化
天线、多径分极—均衡器
2.5p
8. Which one of the following is not an interference source?
a) multipath signal b) same frequency re-use c) power control.
9. Which of the following are features that reduce the co-channel interference?
a) FH b) DTX c) TRX d) TU50 e) IUO f) PC g) MHA 2p
1p
10. Write the definition of Erlang (Erl)
Erl=所有用户通话时间之和（秒）/3600（秒）
1p
11. What is the difference between Erlang B and Erlang C?
.
最新整理
爱尔兰C表考虑了排队的情况
1p
12. Slow fading margin is (circle your choice/s)
a) an additional path loss due to shadowing
b) a value needed in area location probability calculations
c) not needed in network planning. 1p
13. Location probability means
a) the probability of a mobile being at a certain location.
b) the probability of having a certain field strength level at a location. 1p
14. A typical ‘outdoor coverage’ threshold (900 MHz) is
a) - 50 dBm b) - 75 dBm c) - 95 dBm d) - 102 dBm. 1p
15. Signal measurements are needed for (true/false)
_T__ model tuning & site candidate evaluation.
_F___ functional testing of sites after comissioning.
_T_ performance measurements of the network.
_F___ blocking probability evaluations. 2p
16. What is a Hot Spot?
1p
17. Are the following statements true or false:
_F___ Building penetration loss is a always 7 dB.
__F__ Street channel effect causes signal degradation in tunnels.
__F__ The regular and super layers' cell ranges are equally big in IUO.
__T__ Power budget handover is done, if a MS detects a stronger signal in a neighbour cell.
__T__ A mature network is normally capacity dependent.
__F__ Radio network planning is fun and not difficult at all. 3p
18. Answer the following:
Yes No
I know these things quite well already
I know some of these things already
I know almost nothing about these things so far
I am an experienced network planner
.
最新整理
I will be an experienced network planner
I would like to see demonstrations of the network planning tools
.