[讨论]借人气问一些基础知识

teconly

<p><span style="FONT-SIZE: 12px;"><font size="2">本人在复习华为资料过程中，遇到些小问题，悬而未决，哪位高手可否点拨一下？<br/><br/>1、GSM蜂窝系统所用频段可分为GSM900Mhz，DCS1800Mhz以及（PCS1900）（GT850）四个频段，为了业务的进一步需要，其中对GSM900Mhz频段进行了扩充，分别为EGSM和RGSM，华为BSC从（&nbsp; &nbsp;&nbsp;&nbsp;）本开始实现了全频段支持。<br/>我觉得应该是PGSM、EGSM、RGSM和DCS1800四个频段？<br/>EGSM和RGSM，从RGSM开始实现全频段支持？<br/><br/>2、 在不配置（&nbsp; &nbsp; ）接口的情况下，就无法实现GPRS短消息功能。<br/><br/>3、 在路测中发现同频干扰，但还能够正常通话，依据协议，C/A至少满足大于等于（&nbsp; &nbsp;-6&nbsp;&nbsp;）db ？是否是-6db？<br/><br/>4、 GPRS使用GMSK的调制技术，单信道树率较低。EDGE则基于（ 8PSK&nbsp;&nbsp;）调制技术，允许无线接口有更高的比特率，S2/2/2基站开通EDGE功能，假设每个小区配置4个PDCH信道，那么至少要配置（ 12&nbsp;&nbsp;）个空闲时隙，手机下行在绑定4个时隙的时候速率达到最高。是12？<br/><br/>5、一般进行上下行判决中，是根据上行平均质量和下行平均质量来观察是上行还是下行问题，上行平均电平和下行平均电平只作为参考。T or F？</font></span></p><p><span style="FONT-SIZE: 12px;"><font size="2">6、<span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;; mso-bidi-font-weight: bold;">在华为光传输网络中，由于匹配光传输的小基站广泛使用中，使得网元数过多时，因</span><span lang="EN-US" style="FONT-SIZE: 9pt; mso-bidi-font-weight: bold;"><font face="Times New Roman">ECC</font></span><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;; mso-bidi-font-weight: bold;">振荡会造成部分小基站</span><span lang="EN-US" style="FONT-SIZE: 9pt; mso-bidi-font-weight: bold;"><font face="Times New Roman">ASU</font></span><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;; mso-bidi-font-weight: bold;">单板无法维护，因此建议同网网元数量建议的典型值在</span><span lang="EN-US" style="FONT-SIZE: 9pt; mso-bidi-font-weight: bold;"><font face="Times New Roman">100</font></span><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;; mso-bidi-font-weight: bold;">以内，最大数量不超过</span><span lang="EN-US" style="FONT-SIZE: 9pt; mso-bidi-font-weight: bold;"><font face="Times New Roman">250。<font size="2">T or F？</font></font></span><span lang="EN-US" style="FONT-SIZE: 9pt;"><p></p></span></font></span></p><p></p><p></p>7、<span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;; mso-bidi-font-weight: bold;">对于</span><span lang="EN-US" style="FONT-SIZE: 9pt; mso-bidi-font-weight: bold;"><font face="Times New Roman">GPRS</font></span><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;; mso-bidi-font-weight: bold;">小区而言，如果小区配置有</span><span lang="EN-US" style="FONT-SIZE: 9pt; mso-bidi-font-weight: bold;"><font face="Times New Roman">BCCH</font></span><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;; mso-bidi-font-weight: bold;">，则在</span><span lang="EN-US" style="FONT-SIZE: 9pt; mso-bidi-font-weight: bold;"><font face="Times New Roman">BCCH</font></span><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;; mso-bidi-font-weight: bold;">上传送的系统消息</span><span lang="EN-US" style="FONT-SIZE: 9pt; mso-bidi-font-weight: bold;"><font face="Times New Roman">SI13</font></span><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;; mso-bidi-font-weight: bold;">告知</span><span lang="EN-US" style="FONT-SIZE: 9pt; mso-bidi-font-weight: bold;"><font face="Times New Roman">MS</font></span><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;; mso-bidi-font-weight: bold;">，该小区已经配置了</span><span lang="EN-US" style="FONT-SIZE: 9pt; mso-bidi-font-weight: bold;"><font face="Times New Roman">BCCH</font></span><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;; mso-bidi-font-weight: bold;">，将通过</span><span lang="EN-US" style="FONT-SIZE: 9pt; mso-bidi-font-weight: bold;"><font face="Times New Roman">SDCCH</font></span><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;; mso-bidi-font-weight: bold;">用于分组业务的参数。<font size="2">T or F？</font></span><span lang="EN-US" style="FONT-SIZE: 9pt;"><p></p></span>

[此贴子已经被作者于2007-4-16 22:50:52编辑过]