2005年07月无线WCDMA无线WCDMA网规网优考试试题有答案

绝 密2005年07月合作工程师资格认证考试试题考试科目： 无线WCDMA 网规、 网优注意事项：A. 本试卷为2005年7月合作工程师资格认证考试试题，考试时间为120分钟，闭卷考试。B. 应考人员在答题前，请将姓名、工号、所在具体部门、职务认真准确地填写在答题纸的折线内，不得在试卷上答题，所有答题在答题纸上完成。C. 应考人员应严格遵守考场纪律，服从监考人员的监督和管理，凡考场舞弊不听劝阻或警告者，监考人员有权终止其考试资格，没收试卷，以0分处理。D. 考试结束，应考人员应停止答卷，离开考场。监考人员收卷后，对答卷纸进行装订、密封，送交有关部门进行评判。第 1 页 共 60 页一、填空题（每空1分，共15分）1. 在RNC LMT中跟踪信令时，信令的时间标签是 BAM 的时间，而不是LMT的时间。2. WCDMA系统中，RNC和RNC之间的接口是_Iur _。3. 小区搜索分三步，第一步是利用PSCH信道的_PSC_获得时隙同步；第二步是利用SSCH信道的_SSC_获得帧同步和主扰码组组号；第三步是利用_CPICH_信道获得该小区所使用的主扰码。4. GENEX Probe V1.1 支持WCDMA/GSM 双模测试。支持多种语音业务和数据业务测试，也支持室内测试。5. 在上行容量分析中，噪声上升与负载因子的关系式为Noise rise 1/(1-x) （负载因子用x表示）；6. BTS3812 V1.3单机柜支持1536个等效话音信道（速率为12.2kbps），满配置有 6 个功放板。7. 对下行扰码而言，使用长扰码，范围从0到224-1，但为了加速小区搜索的过程，仅有 8192 个码可以使用，分为512个组，总共有 512 个主扰码。8. 关于measurement report 与measurement control的的传送方向:measurement control是从UTRAN到UE；9. 小区选择参数最低质量标准（Qqualmin）对应的是CPICH Ec/Io最低门限；10. 目前我们在测试时使用的GPS的坐标系是 WGS1984 ；11. CE的英语全称是： Channel Element；二、判断题（正确的打“”，错误的打“”）。（每题1分，共15分）1. 对处于空闲模式、CELL_PCH 和 URA_PCH状态的用户，UTRAN通过在PCCH上发送PAGING TYPE 2寻呼消息来启动寻呼过程。（ ）2. 无线传播中快衰落也叫阴影衰落，服从正态分布；慢衰落也叫瑞利衰落，服从瑞利分布。（）3. 接收信号强度指示（RSSI）指的是信道宽度内的宽带接收功率，因此实际上就是通常说的Ec。（ ）4. CW测试即连续波测试，通过CW测试和数字地图可以获得进行模型校正的数据，但这并不是是进行模型校正的必经步骤。() 5. 增加塔放后，虽然NodeB上行接收灵敏度可以提高，但是这样对于外界干扰更敏感，使得增加塔放后噪声系数的改善量没有理论分析的那么大。 （）6. 数字地图的精度可以通过Height目录下的project文件来查询。()7. 对于多径信道模型（Channel Model）， Static表示静态信道，无多径；TU3表示典型城区3公里车速。（）8. 在无塔放条件下的塔顶天线接头处等效噪声系数 = NF_BS + 馈缆损耗。（）9. WCDMA上下行频率都是2G频段，所以在链路预算的过程中,一般上下行频差损耗可以忽略不计。 () 10. NodeB CE 数的估算先分别进行上、下行CE数估算，最后取数值大的进行NodeB上下行处理单板的估算。()11. 我们常用的标准宏蜂窝模型和Cost 231模型一样都是纯经验模型。（）12. 实际传播环境中，第一菲涅尔区定义为包含一些反射点的椭圆体，在这些反射点上反射波和直射波的路径差小于半个波长。第一菲涅尔区是主传播区，当阻挡物不阻挡第一菲涅尔区时，绕射损耗最小。( ) 13. BTS3812单机柜支持1536个等效语音信道（速率为12.2Kbit/s）；BTS3806A单机柜支持768个等效话音信道（速率为12.2Kbit/s）；BTS3802C基站支持64个等效语音信道（速率为12.2Kbit/s）。（）14. 专业的CW测试设备的采样方式有三种：按时间采样；按脉冲采样；按距离采样。按距离采样进行测试时，能够严格满足李氏定理40个波长采样3650个样点的要求，测量准确度很高。距离采样方法对于车速要求不严格，但是存在一个车速上限。() 15. UE在CELL_DCH状态下也会读系统消息。（）三、单项选择题 （每题2分，共20分）1. （ B ）是通过动态调整小区的CPICH的发射功率，来调整小区边界，实现相邻小区的负载平衡。A、 载频切换 B、 小区呼吸C、 潜在用户控制D、 软容量2. 在计算上行某种业务的单用户负荷时，会用到下面这个公式：， 公式中，表示：（ D ）A、业务邻区干扰因子 B、业务正交化因子 C、业务非正交化因子 D、业务的激活因子3. 关于BSC6800的扩容与升级，以下说法哪一个是不正确的？（ D ）A、 传统的扩容是靠硬件叠加来实现的，运营商通过购买不同数量的插框和单 板可以得到相应的容量。B、 在建网初期运营商希望以更少的投资来运营一个规模较小系统，因此需要用软件的方法，即通过License授权，提供更精确的容量控制。C、 通过License功能，用户可以根据实际业务需要，灵活选择适合于特定阶段的网络功能，最大程度保护投资。D、 采用License功能后，BSC6800的系统扩容与功能升级必然伴随着实际的硬件扩容和升级。4. 下面关于WCDMA系统中天线方向角时应遵循以下原则的说法正确的是 ( C )A、天线的主瓣方向指向高话务密度区，可以加强该地区信号强度，提高容量、但通话质量会有所下降B、市区相邻扇区天线交叉覆盖深度不宜超过15%，同基站相邻扇区天线方向夹角不宜小于90C、天线方位角的设计应从整个网络的角度考虑，在满足覆盖的基础上，尽可能保证市区各基站的三扇区方位角一致，局部微调，以避免日后新增基站扩容时增加复杂性D、为防止越区覆盖，出现导频污染，密集市区应避免天线主瓣正对较直的街道，但正对河流、金属等无所谓5. 进行CW测试时，假设车速为72Km/h，那么为了满足李氏定理，接收机需要每秒至少接收多少个样点？（D）A 36 B 72 C 108 D 120 6. 下列不属于公共传输信道的有：（ E ）A. BCH, 广播信道B. FACH, 前向接入信道C. PCH, 寻呼信道D. RACH,反向（随机）接入信道E. CPICH, 公共导频信道7. 以下哪种模型适用于室内传播模型？（B）A、Okumura-Hata B、Keenan-MotleyC、Cost231-Hata D、规划软件ASSET中使用的SPM模型8. 切换过程中，UE处于什么状态？（ B ）A. CELL_PCH B. CELL_DCH C. CELL_FACH D. URA_PCH9. BTS3812在31配置方式下，其典型功耗是：（ A ）A. 1633WB. 1780WC. 2177WD. 2377W10. 哪一个事件将触发：如是活动集小区，更改最好小区；如是监视集小区，则加入活动集并更改最好小区?（D）A、1AB、1BC、1C D、1D四、多项选择题（每题2分，全部选择正确得分，共20分）1、 网络规划过程中，若进行无线勘测工作，会涉及到下列哪几个文档？（ B、C、D、F）A、网规参数设计报告B、无线勘测准备自检表C、无线勘测报告(XXX基站)D、无线勘测汇总表E、网络优化报告F、工程参数总表2、 阴影衰落余量通常与哪些因素相关：（ A B C D ）A、区域覆盖概率 B、边缘覆盖概率 C、阴影衰落标准方差 D、路径损耗因子3、 WCDMA中对抗衰落的方法有：( ABCD )A、使用多个Rake指峰（相关接收机）把那些延迟的、分散的能量集中起来，这些指峰分配到那些有显著能量到来的延迟位置上。B、利用快速功率控制和Rake接收机内在的分集接收的性质来减轻信号功率衰落的问题。C、采用强大的编码、交织和重传协议给信号增加冗余度和时间分集以助于接收机从衰落中恢复用户比特。D、WCDMA本身就是一个宽带系统，能够提供频率分集的作用，可以起到对抗衰落的目的。4、 在WCDMA中，下列哪些是邻区规划应该遵循的原则：（ ABD ）A、地理位置上直接相邻的小区一般要作为邻区B、邻区一般都要求互为邻区，即A扇区载频把B作为邻区，B也要把A作为邻区C、对于密集城区和普通城区，由于站间距比较近，邻区应该多做，但一般来说，同频邻区不能超过64个，异频邻区和异系统邻区不能超过32个。D、对于市郊和郊县的基站，虽然站间距很大，但一定要把位置上相邻的作为邻区，保证能够及时切换，避免掉话5、 RNC是无线网络控制器，主要完成连接建立和断开、切换、宏分集合并、无线资源管理控制等功能。具体如下：（ A D E ）A、切换和RNC迁移等移动性管理功能；B、提供PS域的路由转发、鉴权和加密等功能；C、完成呼入呼叫的路由功能及与固定网等外部网络的网间结算功能；D、宏分集合并、功率控制、无线承载分配等无线资源管理和控制功能；E、执行系统信息广播与系统接入控制功能。6、 Node B由下列哪些逻辑功能模块构成：（ BDE ）A、系统接入控制部分B、基带部分（BB）C、移动性管理控制部分D、RF收发放大部分E、传输接口单元7、 在模型校正的数据处理过程中，下列哪些数据需要过滤：（A B C D）A、隧道中的数据；B、 距天线太远的数据；C、定向天线的旁瓣区域测得的数据；D、信号太弱的数据。 8、 无线传播模型受到（ A B C ）影响.A、传播环境B、系统工作频率C、移动台运动状况D、用户分布密度9、 在WCDMA下行链路预算中，下面哪些项是由设备本身性能决定的？（A B D）A、 基站发射功率B、 接收机静态灵敏度C、 传播损耗值D、 发射天线的增益10、 下面关于容量预算说法正确的是：（ A B ）A、下行容量负载可以用基站实际发射功率占用最大发射功率的比例来衡量。B、下行各用户用相互正交的 OVSF 码区分，在没有多径的静态传播条件下，没有相互干扰，因此能够提高容量。C、WCDMA系统的容量一定是上行受限。D、不管采用何种技术，WCDMA系统的DPDCH信道速率不会超过3.84Mb/s。五、简答题（共15分）1. WCDMA系统中各物理信道所采用的功率控制方法各不相同，并且同一个物理信道也可以有多种功率控制方式。请完成下表，在相应的空格处标上“Y”表示该物理信道可以采用的功率控制方式。（5分）物理信道开环功率控制内环功率控制外环功率控制没有功控过程，功率由高层指定DPDCHDPCCHPCCPCHPRACH答：（全部答对可以得5分，错1个扣1分，扣完为止）物理信道开环功率控制内环功率控制外环功率控制没有功控过程，功率由高层指定DPDCHYYDPCCHYYYPCCPCHYPRACHY2简述目前我司无线网络估算工具的估算思路（10分）答：网络估算首先根据预先设计的网络负载从覆盖的角度出发计算小区半径，然后结合用户分布和话务模型，计算出小区负载，然后将计算出来的小区负载与预设小区负载进行比较，判断小区是覆盖受限还是容量受限。(2分)当估算结果是覆盖受限时，可以适当降低小区负荷因子，重新进行覆盖和容量分析，直到覆盖和容量所估算的结果相差最小。在此基础上，直接根据覆盖分析结果，计算NodeB所需硬件数目（站点数，扇区数，载波数）。(3分)当计算结果是容量受限时（根据实际情况综合考虑扇区化、增加载波、容量提升技术等方式），需要检查小区负荷因子是否可以进一步提高。如果可以提高，则重新进行覆盖和容量分析；如果不能提高，则需要缩小覆盖半径，重新进行容量分析，得到NodeB所需硬件数目（站点数，扇区数，载波数）。(3分)估算的结论必须是同时满足覆盖和容量的要求，在综合考虑近期和远期建网目标，获得最经济有效的方案。因此，覆盖和容量分析存在一个调整的过程。(2分)六、综合分析题 （共15分）1. 在某优化测试中发生掉话，详细的信息如下：掉话点位置不是在3G覆盖的网络边缘，掉话发生在SC358小区（下图中与黑线相连的小区），掉话点和358小区距离较远，如下图：掉话前UE的激活集中只有SC358小区，同时监视集中没有测量到小区。如下图：但掉话前，Scanner测量得到的最强小区为SC364，与UE的激活集的最强小区即SC358不一致，如下图：掉话前，Scanner测量得到的SC364小区的Ec/Io明显好于UE测量得到的SC358小区的Ec/No，如下图：另外,掉话后UE测量得到的最强小区变为SC364。1) 请分析上述掉话是何原因导致？（5分）答：经过分析可见小区SC358的邻区列表中漏配小区SC364是造成此次掉话的原因。2) 请填写下面的掉话分析流程：（4分）答：确认掉话地点和小区1分析邻区关系4分析信令2分析覆盖3分析切换3) 请给出可能导致掉话的各种常见原因（最少列举6点）？（6分）答：a) 设备原因；（1分）b) 覆盖差，导频RSCP低，不同业务有不同覆盖指标要求；（1分）c) 下行干扰大，导频RSCP不低，Ec/Io差，不同业务有不同要求；（1分）d) 上行干扰大，RSSI扫描结果存在上行干扰；（1分）e) 切换区小；（1分）f) 邻区漏配。（1分）第 60 页 共 60 页（英文版 ） Two regulations promulgated for implementation is in the party in power for a long time and the rule of law conditions, the implementation of comprehensive strictly strategic plan, implementation in accordance with the rules and discipline to manage the party, strengthen inner-party supervision of major initiatives. The two regulations supporting each other, the adhere to a positive advocate, focusing on morality is of Party members and Party leading cadres can see, enough to get a high standard; around the party discipline, disciplinary ruler requirements, listed as negative list, focusing on vertical gauge, draw the party organizations and Party members do not touch the bottom line . Here, the main from four square face two party rules of interpretation: the first part introduces two party Revised regulations the necessity and the revision process; the second part is the interpretation of the two fundamental principles of the revision of laws and regulations in the party; the third part introduces two party regulations modified the main changes and needs to grasp several key problems; the fourth part on how to grasp the implementation of the two regulations of the party. and revised the necessity and revised history of the CPC Central Committee the amendment to the Chinese Communist Party members and leading cadres honest politics several guidelines and column 1 by 2015 to strengthen party laws and regulations focus. Two party regulations revision work lasted a Years, pooling the wisdom of the whole party, ideological consensus, draw historical experience, respect for the wisdom of our predecessors, which reflects the unity of inheritance and innovation; follow the correct direction, grasp the limited goals, adhere to the partys leadership, to solve the masses of the people reflect a focus on the problem. The new revision of the and , reflects the partys 18 and the eighth session of the third, the spirit of the fourth plenary session, reflecting the experience of studying and implementing the General Secretary Xi Jinping series of important speech, reflects the partys eighteen years comprehensive strictly practice. (a) revised two regulations of the party need of in based on revised, the promulgation and implementation of January 2010, to strengthen the construction of the contingent of leading cadres play an important role. But with the party to manage the party strictly administering the deepening, has not been able to fully meet the actual needs. Content is too complicated, eight prohibition, 52 are not allowed to hard to remember, and also difficult to put into practice; the second is concisely positive advocated by the lack of prohibited provisions excessive, no autonomy requirements; the third is banned terms and discipline law, both with the party discipline, disciplinary regulations repeat and Criminal law and other laws and regulations repeat; the fourth is to clean the theme is not prominent, not for the existing problems, and is narrow, only needle of county-level leading cadres above. is in 1997 based on revision, in December 2003 the promulgation and implementation, to strengthen the construction of the party play very important role. Along with the development of the situation, which many provisions have been unable to fully meet the comprehensive strictly administering the practice needs. One is Ji law, more than half of the provisions and criminal law and other countries laws and regulations Repetition; two is the political discipline regulations is not prominent, not specific, for violation of the party constitution, damage the authority of Party Constitution of misconduct lack necessary and serious responsibility to pursue; third is the main discipline for the leading cadres, does not cover all Party members. Based on the above situation, need to and the two is likely to be more relevant regulations first amendment. By revising, really put the authority of Party discipline, the seriousness in the party tree and call up the majority of Party members and cadres of the party constitution of party compasses party consciousness. (II) two party regulations revision process the Central Committee of the Communist Party of China attaches great importance to two regulations revision . Xi Jinping, general books recorded in the Fifth Plenary Session of the eighth session of the Central Commission for Discipline Inspection, on the revised regulations made clear instructions. According to the central deployment, the Central Commission for Discipline Inspection from 2014 under six months begin study two regulations revision. The Standing Committee of the Central Commission for Discipline Inspection 4 review revised. Comrade Wang Qishan 14 times held a special meeting to study two regulations revision, amendment clarifies the direction, major issues of principle, path and target, respectively held a forum will listen to part of the province (area) secretary of the Party committee, Secretary of the Discipline Inspection Commission, part of the central ministries and state organs Department The first party committee is mainly responsible for people, views of experts and scholars and grassroots party organizations and Party members. Approved by the Central Committee of the Communist Party of China, on 7 September 2015, the general office of the Central Committee of the Party issued a notice to solicit the provinces (autonomous regions, municipalities) Party, the central ministries and commissions, state ministries and commissions of the Party (party), the General Political Department of the military, every 3 people organization of Party of two regulations revision opinion. Central Commission for Discipline Inspection of extensive solicitation of opinions, careful study, attracting, formed a revised sent reviewers. In October 8 and October 12, Central Committee Political Bureau Standing Committee and the Political Bureau of the Central Committee After consideration of the two regulations revised draft. On October 18, the Central Committee of the Communist Party of China formally issued two regulations. Can say, two laws amendment concentrated the wisdom of the whole party, embodies the party. Second, and revision of the basic principles of two party regulations revision work and implement the partys eighteen, ten eight plenary, the spirit of the Fourth Plenary Session of the Eleventh Central Committee and General Secretary Xi Jinping important instructions on the revised and , highlighting the ruling party characteristics, serious discipline, the discipline quite in front of the law, based on the current, a long-term, advance as a whole, with Bu Xiuding independent and . Main principle is: first, adhere to the party constitution to follow. The constitution about discipline and self-discipline required specific, awaken the party constitution of party compasses party consciousness, maintaining the authority of the constitution. General Secretary Xi Jinping pointed out that no rules, no side round. Party constitution is the fundamental law, the party must follow the general rules. In early 2015 held the eighth session of the Central Commission for Discipline Inspection Fifth Plenary Session of the 16th Central Committee, Xi Jinping again pointed out that constitution is the party must follow the general rules, but also the general rules. the revision of the and is Method in adhere to the regulations established for the purpose of combining rule of virtue is to adhere to the party constitution as a fundamental to follow, the constitution authority set up, wake up the party constitution and party rules the sense of discipline, the party constitution about discipline and self-discipline specific requirements. 4 second is to adhere to in accordance with the regulations governing the party and the party. The Party of rule of virtue de, mainly refers to the partys ideals and beliefs, excellent traditional style. The revised the closely linked to the self-discipline, insisting on the positive initiative, for all members, highlight the vital few, emphasized self-discipline, focusing on the morality, and the majority of Party members and the ideological and moral standards. The revised Ji method separately, Ji, Ji Yan to Method, as a negative list, emphasizing the heteronomy, focusing on vertical gauge. Is this one high and one low, a positive reaction, the strict party discipline and practice results transformation for the integration of the whole party to observe moral and discipline requirements, for the majority of Party members and cadres provides benchmarking and ruler. Third, insist on to. In view of the problems existing in the party at the present stage, the main problems of Party members and cadres in the aspect of self-discipline and abide by the discipline to make clearly defined, especially the partys eighteen years strict political discipline and political rules, organization and discipline and to implement the central eight provisions of the spirit against the four winds and other requirements into Disciplinary provisions. Not one pace reachs the designated position, focusing on in line with reality, pragmatic and effective. After the revision of major changes, major changes in the and modified and needs to grasp several key problems (a) adhere to according to regulations governing the party and party with morals in combination, for at the present stage, the leadership of the party members and cadres and Party members in existing main problems of self-discipline, put forward principles, requirements and specifications, showing Communists noble moral pursuit, reflected at all times and in all over the world ethics from high from low 5 common requirements. One is closely linked to the self-discipline, removal and no direct relation to the provisions of . the second is adhere to a positive advocate, eight prohibition 52 are not allowed to about the content of the negative list moved into synchronization amendment . Three is for all the party members, will apply object from the leadership of the party members and cadres to expand to all Party members, fully embodies the comprehensive strictly required. The fourth is prominent key minority, seize the leadership of the party members and cadres is the key, and put forward higher requirements than the ordinary Party members. Five is to simplify, and strive to achieve concise, easy to understand, easy to remember. The revised is the ruling Party since the first insists on a positive advocate forAll Party members and the self-discipline norms, moral declaration issued to all members of the party and the National Peoples solemn commitment. criterion of a clean and honest administration consists of 4 parts, 18, more than 3600 words. After the revision of the , a total of eight, 281 words, including lead, specification and Party member cadre clean fingered self-discipline norms, etc. Part 3 members low-cost clean and self-discipline, the main contents can be summarized as four must eight code. Lead part, reiterated on ideal and faith, fundamental purpose, the fine traditions and work style, noble sentiments, such as four must the principle of requirements, strong tone of self-discipline, The higher request for 6 and supervised tenet, the foothold in permanent Bao the partys advanced nature and purity, to reflect the revised standards requirements. Members of self-discipline norms around the party members how to correctly treat and deal with the public and private, cheap and rot thrifty and extravagance bitter music, put forward the four norms. Party leader cadre clean fingered self-discipline norms for the leadership of the party members and cadres of the vital few, around the clean politics, from civil servant of the color, the exercise of power, moral integrity, a good family tradition and other aspects of the leadership of the party members and cadres of the four norms to fully adapt to the strictly requirements, reflects the according to the regulations governing the law of recognition of deepening, the realization of the discipline construction and Jin Ju. is party a ruler, members of the basic line and follow. And the majority of Party members and cadres of Party organizations at all levels should adhere to the bottom line of thinking, fear discipline, hold the bottom line, as a preventive measure, to keep the partys advanced natu