7-试题
序号试题内容
1CDMA的关键技术包括『____』、『____』、『____』
2在CDMA系统中，为克服无线的多径传输，采用的关键技术是（ ）。
In the CDMA system, in order to overcome the multipath transmission of radio, the key technologies adopted are ( ).
3CDMA-1X中补充信道的作用是（ ）。
The functions of the supplementary channel in the CDMA-1X are ( ).
4承载高速分组数据业务的信道是（ ）。 The channel for carrying the high-speed packet data service is ( ).
5CDMA中短码的作用是（ ）。
The function of the short code in the CDMA is ( ).
6在cdma20001x系统中，导频信道使用（ ）来扩频。
In the cdma20001x system, the pilot channel uses ( ) for spreading.
7在cdma20001x系统中，同步信道使用（ ）来扩频。
In the cdma20001x system, the synchronization channel uses ( ) for spreading.
8CDMA中Walsh码的作用是（ ）。
The function of the Walsh code in the CDMA is ( ).
9CDMA系统中移动台显示的时间从（ ）获取。 In the CDMA system, the time displayed on the MS is obtained from ( ).
10cdma2000 1X的WALSH码长是（ ）位。 The length of the WALSH code in the cdma2000 1X is ( ) bits.
11IS95使用的WALSH码是（ ）阶。
The WALSH code used in IS95 is ( )-orders.
12cdma2000 1X使用的WALSH码是（ ）阶。 The WALSH code used in cdma2000 1X is ( )-orders.
13CDMA中短码的码长是（ ）位。
The length of the short code in CDMA is ( ) bits.
14CDMA系统功率控制子信道插入在前向（ ）中。 The power control sub-channel of the CDMA system is inserted into the forward ( ).
15多个直放站共用一个施主基站时，该施主基站最多能带多少直放站主要取决于（ ）。 When multiple repeaters share one donor BTS, the number of repeaters that can be carried by the donor BTS primarily depends on ( ).
16直放站扩展了施主基站的覆盖范围，使施主基站所支持的话务量增加，同时直放站也导致施主基站覆盖区内移动台的发射功率（ ）。
The repeater expands the coverage of the donor BTS, and increases the traffic supported by the donor BTS. The repeater makes the transmitting power of the MS in the donor BTS coverage area ( ).
17直放站扩展了施主基站的覆盖范围，使施主基站所支持的话务量增加，同时直放站也导致施主基站的覆盖半径（ ）。
The repeater expands the coverage of the donor BTS, and increases the traffic supported by the donor BTS. The repeater makes the coverage radius of the donor BTS ( ).
18CDMA直放站施主天线与重发天线的隔离不好，就会引起直放站系统的自激。实践中在直放站增益和隔离度之间一般要求有（ ）的余量。
If the CDMA repeater donor BTS is poorly isolated from the retransmission antenna, the self activation of the repeater system will occur. In the practice, a margin of ( ) should be reserved between the repeater gain and the isolation.
19在FDMA、TDMA和CDMA三种多址接入方式中，『____』
20cdma20001x每个扇区的基本载频中至少包含『____』
21基站在『____』信道发送信息提供移动台建立与系统22基站在『____』信道发送信号供移动台识别基站并引23基站在『____』信道向移动台发送有关寻呼、指令以24『____』信道传送前向通信数据及信令。The 『___ 25『____』信道传送反向通信数据及信令。The 26业务信道被不同的用户占用时，这些用户由『____』27每个寻呼信道可以与高达 32 个『____』信道配合。28移动台使用『____』个接收单元(Finger)，基站使用29寻呼信道的WALSH 码是『____』。The WALSH codes
30香农信道容量公式指出：如果信息传输速率C不变，则带宽W和信噪比P/N是可以互换的。 The Shannon channel capacity formula shows that: With information transmission rate C unchanged, the bandwidth W and signal-noise ratio P/N can be reciprocated.
31目前3G标准采纳的三种空中接口标准为 WCDMA、CDMA2000、TD-SCDMA。
Currently, the 3G standard adopts three
air interface standards: WCDMA, CDMA2000 and TD-SCDMA.
32香农信道容量公式指出：当信号低于噪声时，不可以进行可靠的通信。
The Shannon channel capacity formula indicates that: When the signal is lower than the noise, reliable communication is not possible.
33工程中常用的7/8”馈线，工作频率越高，波长越短，损耗越小。
The 7/8” feeder is often used in engineering. The higher the working frequency, the shorter the wavelength, and the less the loss of the feeder.
34GPS天线（通常称之为蘑菇头）为有源天线，内部有放大电路，需要外部供电。
The GPS antenna (generally referred to as “mushroom head) is an active antenna with amplification circuits
35A2接口用于支持当移动台处于控制在业务信道状态时所发生的BSS之间的软切换，A2接口被划分成两部分：A2信令接口和A2业务接口。
The A2 interface is used for supporting the soft handoff between BSSs that occurs when the MS is in the traffic channel status. The A2 interface is divided into two parts: A2 signaling interface and A2 service interface.
36F-CACH为前向公共功率控制信道。 The F-CACH is forward pubblic power control channel.
37同一BTS内不同扇区相同载频之间的切换，我们称之为半软切换。
The handoff between peer carriers of different sectors in the BTS is called semi soft handoff.
38CDMA系统的容量主要受限于系统内移动台的相互干扰，所以如果每个移动台的信号到达基站时都达到所需的最小信噪比，系统容量将会达到最大值。
The capacity of the CDMA system is primarily limited by the mutual interference between MSs in the system. Therefore, if the required minimum signal-to-noise ratio is reached when the signals of each MS arrive at the BTS, the system
39SCCP为BSSAP应用提供两类业务：0类基本面向连接类，2类基本无连接类。
The SCCP provides two types of services
for BSSAP application: Category 0 connection-oriented service, and category 2 non-connection service.
40MTP3从功能分为两个基本功能：信令消息处理功能和信令网络管理功能。
The MTP3 provides two basic functions: Signaling message processing function and signaling network management function.
41分布在CPM上的软件模块有S_BSSAP、S_MTP3和S_MTP2。
The software modules on the CPM include: S_BSSAP, S_MTP3 and S_MTP2.
42前向补充业务信道F-SCH是用来在通话过程中，向特定的MS传送语音信息。（ ）
The forward supplementary traffic channel F-SCH is used for sending voice information to the specific MS in the conversation process. ( )
43从用户的角度看，1x系统与95系统的最大差别在于1x系统能提供高速分组数据业务。（ ） From the point of view of the user, the 1x system differs from the IS95 system primarily in that it provides high-speed packet data services. ( )
44不同MSC下的BSC基站之间只能是硬切换。 Only hard handoff can occur between the BSC BTSs under different MSCs.
45当分组数据呼叫处于dormant状态的时候，下述哪种连接仍然保持着（ ）。
When the packet data call is in dormant state, which of the following connections is still maintained? ( )
46E_S_A1fHandoffRequest消息，发生在数据切换的（ ）过程中。
The E_S_A1fHandoffRequest message occurs in the ( ) process of data service.
47MS发起的由Null到Active状态的起呼过程，与由Dormant到Active状态的重激活过程之间的最大不同之处在于（ ）。 重复
The biggest difference between the call origination process originated by MS from Null to Active status and the reactivation process from Dormant to Active status lies in ( ).
48分组数据业务的计费在（ ）处实现。 The packet data service charging is implemented at ( ).
49在进行分组数据硬切换过程中，当手机收到源基站发出的UmfGeneralHandoffDirectionMsg，同时其也捕获到了目标基站发出Null Traffic帧，此时手机就会向目标基站发（ ）消息，告知其已经切换到了目标基站。
n the process of performing the packet data hard handoff, when the MS receives the UmfGeneralHandoffDirectionMsg sent from the source BTS, the captures the Null Traffic frame sent from the destination BTS at the same time, the MS will send the ( ) message to the destination BTS to tell that it has handed over to the destination BTS.
50参数有效和候选导引信号集搜索窗口大小"的作用是（ ）。
The function of the parameter “search window size of of active and candidate pilot signal set” is ( ). "
51参数“呼损”的作用是（ ）。
The function of the parameter call loss”is ( )."
52移动通讯中，系统的呼损一般是（ ）。 In the mobile communication, the call loss of the system is generally ( ).
53基站参数“登记周期”应该（ ）MSC登记周期。
The BTS parameter “registration period”should be ( ) MSC registration period.
54参数“有效引导集与候选引导集比较门限”的单位是（ ）。
The unit of the parameter “comparison threshold of active pilot set and candidate pilot set” is ( ).
55当某基站的覆盖半径规划为20公里时，参数“小区半径”是（ ）。
When the coverage radius of a BTS is planned as 20km, the parameter “cell radius” should be set as ( ).
56移动台接入试探成功后，开始发射业务信道信号，业务信道初始发射功率等于（ ）。 When the MS access attempt is successful, the traffic channel signals start being transmitted. The initial transmitting power of the traffic channel is equal to ( ).
57如果参数“接入初始功率偏置 ”为7，那么移动台（ ）以7dBm的功率发射接入信号。
If the value of the parameter “access intial power offset” is 7, the MS ( ) transmit the access signal at the power of 7dBm.
58在选择直放站施主链路时，要求施主基站到达直放站处的信号强度（用测试手机测得）大于（）dBm。
When selecting the donor link of the repeater, the signal strength of the donor BTS arriving at the repeater should be greater than ( ) dBm (measured through
test MS).
59CDMA直放站的工作频段下行是870-880MHz，而GSM的上行频段是890-915MHz，直放站的带外辐射可能会影响GSM的接收机。当直放站转发天线与GSM共址时，必须保证与GSM天线有（ ）米的垂直隔离。
The working band of the CDMA repeater is 870-880MHz on downlink, while the uplink band of GSM is 890-915MHz. The outband radiation of the repeater may affect the receiver of the GSM. When the forwarding antenna of the repeater and the GSM antenna are installed in the same
place,make sure a vertical distance of (
60在1X中能实现而在95中不能实现的的功能是（）。
The functions supported in 1X but disabled in the IS95 are ( ).
61分组数据业务是1x系统区别于95系统的一项最重要的功能，使用补充信道可以提供最高为（ ）速率的高速分组数据传输。
The packet data service is an important function that differentiates the 1x system from the IS95 system. The supplementary traffic channel can provide the high-speed packet data transmission at a rate up to ( ).
62移动台和BTS之间的接口称为（ ）接口。 The interface between the MS and the BTS is called ( ) interface.
63BSC和MSC（移动交换机）之间的接口称为（ ）接口。
The interface between BSC and MSC Is called ( ) interface.
64BSC和LE（固定交换机）之间的接口称为（ ）接口。
The interface between BSC and LE (local exchange) is called ( ) interface.
65BSC和BTS之间的接口称为（ ）接口。 The interface between BSC and BTS is called ( ) interface.
66承载BSS和MSC之间有关基站管理部分（BSMAP）和直接传递部分（DTAP）的信令信息的接口是（）接口。
The interface that carries the signaling information about the Bastation Management Part (BSMAP) and Direct Transfer Part (DTAP) between BSS and MSC is ( ) interface.
67移动台选定工作系统的过程是发生在下列哪个阶段（ ）。
The process of the MS selecting the working system occurs at the ( ) stage.
68BSS系统的逻辑地址编号中的子系统号0和1，所代表的子系统是（ ）。
The subsystem numbers 0 and 1 in the logic address numbers of the BSS represent the subysystem ( ).
69IS-95的空中接口每信道射频带宽是（ ）MHz。 The RF bandwidth per channel of the air interface of IS-95 is ( ) MHz.
70天线的技术指标之一“极化”，有水平极化，垂直极化，圆极化等，该指标反映（ ）。
One of the technical indices of antenna –“polarization” comes in several types: Horizontal polarization, vertical polarization, and circular polarization. This index reflects ( ).
71同一BSC不同基站之间的同频切换是（ ）。 The co-frequency handover between
different BTSs of the same BSC is ( ).
72基站下移动台信号很好，但是不能打通电话，与此有关的无线参数有（ ）。
The MS signals under the BTS are very strong, but the call cannot be put through. The radio parameters related to this include ( ).
73无线参数导引信号增加门限（ ），越容易发生切换。
If the radio parameter pilot signal increase threshold is ( ), the handover is more likely to occur.
74决定短消息在业务信道还是在控制信道发送的BSC无线参数是（ ）。
The BSC radio parameter that decides whether the short message is sent at the traffic channel or the control channel is ( ).
75在有突发的话务高峰期到来前，可以（ ）CPM_CPU过载控制门限值，防止CPM_CPU的处理能力到达饱和。
Before bursty traffic peak period comes, we can ( ) the CPM_CPU overload control threshold value to prevent saturation of the processing capability of CPM_CPU.
76无线参数导频信道增益缺省值为225，意思是（）。
The default value of the radio parameter “pilot channel gain” is 225, which means ( ).
77有效和候选导引信号集搜索窗口大小（ ）。 The size of the search window of the valid and candidate pilot signal set ( ).
78无线参数中，导引信号PN序列偏置增量和可用的导引信号伪随机序列偏置指数，两者关系正确的说法是（ ）。
In he radio parameters, about relationship between the pilot signal PN sequence
offset increment and available pilot
signal pseudo random sequence offset index, which of the following statements are correct? ( )
79移动通信中主要的信号分割或多址方式有（ ）。
The multi-access modes in mobile communication include ( ).
80对于3G通信，下面的描述正确的是（ ）。 For 3G communication, which of the following descriptions are correct? ( )
81扩频通信有（ ）几种方式。
Spread spectrum communication includes several modes: ( ).
82当某施主基站下增加一个光纤直放站，直放站覆盖区与其他基站存在切换时，可能需要修改的参数有（ ）。
When adding an optical repeater to a donor BTS, if handoff may occur between the repeater coverage area and other BTSs, the parameters that may need to be modified include ( ).
83下列选项属于IS-95软切换算法中不足之处的有（ ）。
The disadvantages of the IS-95 soft handoff algorithm include ( ).
84信令网络管理功能分为（ ）。
The signaling network management functions include ( ).
85适应不同场合，直放站有多种类型，包括（ ）。
To suit different situations, repeaters come in many types, including ( ).
86双极化天线两个端口说法正确的是（ ）。 Which of the following statements about the two ports of the dual polarization antenna are correct? ( )
87无线参数最大时隙周期对（ ）有影响。 The maximum timeslot period of the wireless parameter has effect on ( ).
88MS发起的由Null到Active状态的起呼过程，与由Dormant到Active状态的重激活过程之间的最大不同之处在于( )。
The biggest difference between the call origination process originated by MS from Null to Active status and the reactivation process from Dormant to Active status lies in ( ).
89在移动台发起的数据业务起呼过程中，MSC与BSC 之间不需要哪条消息（ ）。
In the data service call origination process originated by the MS, which of the messages is not required between MSC and BSC? ( )
90关于cdma2000 1x高速分组数据业务处于休眠状态的描述哪些是错误的（ ）。
For the cdma2000 1x high speed packet data service in dormant state, which of the following descriptions is incorrect ( )
91PCF和BSC.PDSN之间的信令接口分别是（ ）。 The signaling interfaces between the PCF
and BSC, between PCF and PDSN are ( ) respectively.
92在A11接口中,A11登记响应消息含义很多,其中
A11登记成功后返回的byCode字段值应为（
）。
In the A11 interface, the A11 registration response message has many meanings. The byCode field value returned after A11 is
93RCM在收到信令调用（ ）DBS进行基本信道资源分配。
After receiving signaling, the RCM invokes the ( ) DBS to perform basic channel resource allocation.
94被叫用户的振铃是通过那条信令发给手机的（）。
The ringing of the called user is sent to the MS through the ( ) signaling.
95IS-95软切换算法中，触发导频信号从相邻集变为候选集的参数是（ ）。
In the IS-95 soft handoff algorithm, the parameter that triggers the pilot signal to be added from neighbor set to candidate set is ( ).
96CDMA系统中，相邻集最多有（ ）个。
A maximum of ( ) adjacent sets can exist in the CDMA system.
97IS_95前向功率控制分RC1与RC2两种，其中RC2是根据（ ）来衡量前向链路帧好坏的。 The forward power control of IS_95 is categorized into two types: RC1 and RC2. RC2 measures the quality of the forward link according to ( ).
98CCM与SVM之间的接口是（ ）。 The interface between CCM and SVM is ( ).
99数字通信中模/数转换的一般过程是（ ）。 The general process of analog-digital conversion in the digital communication is ( ).
100cdma2000系统的发展过程依次是（ ）。 The evolution process of the cdma2000 system is ( ).
101中兴CDMA系统的正式商用推出时间是在（ ）年。
ZTE's CDMA system was launched for commercial application in ( ).
102CDMA扩频的多址方式是（ ）。 The multi-access modes of the CDMA spreading spectrum are ( ).
103CDMA又被称为扩频通信，在目前的cdma2000中采用（ ）方式，因此又被称为ds_cdma。 CDMA is also called spreading spectrum communication. In the current cdma2000, the ( ) mode is adopted. Therefore it is also called DS_CDMA.
104CDMA系统中，所有小区的频率是相同的，其频率复用系数是（ ）。
In the CDMA system, the frequencies of all cells are the same. The frequency multiplexing factor is ( ).
105CDMA采用了扩频通信技术，在cdma2000中的扩频增益或者称为处理增益是（ ）dB。
The CDMA adopts the spectrum spreading technology. The spreading gain or processing gain in the cdma2000 is ( )dB.
106CDMA中的软切换是指（ ）。
Soft handoff in the CDMA means ( ).
107450M系统工作频率上行中心频率值计算公式（N 为频点,单位是MHz）是（ ）。
The formula for calculating the uplink central frequency value of the 450 system (N is frequency and the unit is MHz) is ( ).
108450M系统工作频率下行中心频率值计算公式（N 为频点,单位是MHz）是（ ）。
The formula of calculating the uplink central frequency value of the 450 system (N is frequency and the unit is MHz) is ( ).
109我们常说CDMA手机发射功率是23dBm，也就是（）瓦。
Generally, the transmitting power of the CDMA mobile phone is 23dBm, i.e., ( )w.
110如果将天线看成滤波器，那么它是（ ）。 If the antenna is deemed a filter, it is ( ).
111工程中常用的7/8”馈线每百米损耗在800M时约是（ ）dB。
The loss of each 100m of commonly used 7/8” feeder is approx. ( )dB at the bandwidth of 800M.
112在移动通信系统中通常使用65°的天线，该65°是指（ ）。
In the mobile communication system, the 65° antenna is generally used. Here 65°means ( ).
113使用GPS接收机可以确定三维空间参数：经度、纬度和高度，要进行定位至少需要成功接收（）颗卫星的信号。
The GPS receiver can be used for determining the 3D space parameters: Longitude, latitude and altitude. To locate an object, it is necessary to receive signals from at least ( ) satellites successfully.
114民用GPS系统的工作频率是（ ）。 The working frequency of the civil GPS system is ( ).
115GPS天线的供电电压是（ ）V。
The supply voltage of the GPS antenna is ( )V.
116关于GPS天线的正确说法是（ ）。 Which of the following statements about GPS antenna is correct? ( )
117BTS采用单极化天线时，同一扇区两付天线间的距离可以按d≥10～20λ安装，800M系统时，同一扇区的两付天线的最小距离必须大于 （ ）。
When the BTS adopts the single
polarization antenna, the distance between two pairs of antennas of the same sector can be installed at d≥10~20λ. In the
800M system, the minimum distance between two sets of antennas of the same sector
118主天馈系统中馈线包括主馈线和跳线两种。跳线提供基站天线和主馈线、主馈线和BTS之间的信号连接，一般采用（ ）电缆。
The feeder cables in the main antenna & feeder system falls into two types: Main feeder and jumper. The jumper provides signal connection between the BTS antenna and the main feeder, or between the main feeder and the BTS, and is generally ( ) cable.
119关于主天馈系统天线的正确说法是（ ）。 Which of the following statements about
the main antenna & feeder system antenna are correct? ( )
120一个单载3扇区的宏基站，当使用双极化天线时，所需的天线数量总共是（ ）根。 For a 1-carrier 3-sector macro BTS, when the dual polarization antenna is used, the total number of antennas required is ( ).
121CDMA系统有8 kbit/s、『____』和『____』语音编码122CDMA系统的高容量很大一部分因素是由于它的『___ 123接收分集常采用『____』、『____』、极化分集和时124在通信系统中使用较多的两种极化天线是『____』和125移动通讯中，基站天线的方位角定义为从『____』方126当驻波比S＝1.5时，｜V反｜/｜V入｜＝『____』。127天线的下倾方式分为『____』、固定电子下倾和『_ 128天线增益一般常用dBd和dBi两种单位。两者有一个固129GPS全球卫星定位系统包括三部分，分别是：『____ 130数据业务包含『____』、『____』、和『____』三种131处于空闲状态的移动台，如果正在发起和接收呼叫，132移动台进入系统空闲状态，移动台通过『____』接收133接入切换包括『____』、『____』、『____』三种。
134导频搜索窗口包括三种，分别是『____』、『____』
135前向闭环的算法实现点在『____』（计算前向功控比136前向快速功率控制分为『____』和『____』。The f 137对于反向闭环功率控制，基站检测来自手机的信噪比138反向功率控制包括『____』、『____』和『____』三139分组数据硬切换主要包括『____』和『____』两个过
140E_『____』_A1rHandoffRequired消息由源基站发向141RLP与PCF之间用来承载数据的接口是 『____』。Th 142A1接口主要承载BSS和『____』之间包括与无线资源
143公式话务掉话比=『____』Formula: Call drop ratio = 『____』.
144超忙基站定义_『____』；超闲基站定义_『____』；
145在cdma2000中，空中信号一个码片延时大约相当于『
146无线参数配置“导频信道增益”参数的大小对『___
147功控的目标是在所有条件下保持链路质量的同时，限
148供移动台随机占用，移动台在『____』信道发起呼叫
149一个接入信道由『____』标识。One access channel is idnetified by its 『____』. 150在一次呼叫建立的过程中，移动台进入到业务信道之
151目前450M使用的频段主要是哪两个『____』和『___
152电调天线，即指使用『____』调整下倾角度的移动天
153短码PN用来标识基站，因此在进行基站规划时PN 不能够重复。
The short code PN is used for identifying the BTS. Therefore, no duplicate PN is allowed when planning the BTS.
154一个MSC可以连接多个BSC，这些BSC中的小区参数CI是可以相同的。但是同一BSC下不同小区的CI不能相同。
One MSC can be connected with multiple BSCs, whose cell parameters CI may be identical, but the CIs of different cells under the same BSC must be different.
155无线参数配置的小区参数中，系统识别码、网络识别码由营运商提供。
In the cell parameters of radio parameter configuration, the system identification code and network identification code are provided by the operator.
156同一BSC下不同小区的PN不能相同。
The PNs of different cells under the same BSC must be different.
157Abis协议是基站控制器BSC和基站收发信机BTS之间的接口协议，在应用层上包括两部分，控制部分（Abisc）和业务部分（Abist）。
The Abis protocol is the interface protocol between the BSC and the BTS. On the application layer, it includes two parts: Control part (Abisc) and service part (Abist).
158移动台在空闲状态下，由于不需要与基站联系，所以也就不需要监听寻呼信道的消息。（ ） In the idle status, the MS does not need to monitor the messages of the paging channel since it does not need to keep contact with the BTS. ( )
159全向天线可以是单极化天线，也可以是双极化天线。
The omni antenna may be unipolarization antenna or dual polarization antenna.
1607/8” 电缆百米损耗小于5/4”电缆。
The loss of the 7/8” cable in a distance of a 100m is less than that of the 5/4”cable.
161选用前后比高的天线，天线的后瓣有可能产生越区覆盖，导致切换关系混乱，产生掉话。 Select the antenna with a high front-back ratio, and the back lobe of the antenna may generate cross-cell coverage, thus leading to confused handoff relation and call drop.
162同一BSC下不同小区的导引信号PN序列偏置增量不能相同。
The PN sequence offset increment of the pilot signal of different cells under the same BSC must be different from each other.
163去掉导引信号定时器T_Tdrop值设置越小，切换越容易出现的乒乓效应。
The lower the value of the pilot signal drop timer T_Tdrop is set, the likelier the ping-pong effect occurs.
164无线参数接入参数中，接入初始功率偏置和功率增量两个参数越大越好，可以提高移动台的接入成功率。
In the radio access parameters, the values of the two parameters “access intial power offset” and “power increment”should be as greater as it could, because they can improve the access success ratio of the MS.
165无线参数小区半径与基站覆盖范围有关。在射频拉远中，该参数的设置需要考虑光纤延迟的影响。
The radio parameter “cell radius” is related to the BTS coverage. In the RF remote station, allowing for the influence
166列出移动通信天线常用的6种技术指标。 List 6 commonly used technical indices of mobile communication antenna.
167搜索窗的作用是什么？如果SRCH_Win_A设置成6，对应的码片数为28（±14），表示的含义是什么。
What are the functions of the search window? If the SRCH_Win_A is set as 6, the corresponding chip quantity is 28 (±14). What does it mean?
168从资源占用和分配的角度，简述更软切换、软切换和硬切换的区别。
Describe the difference between softer handoff, soft handoff and hard handoff in terms of resource occupation and allocation,.