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<TD borderColor=#6699ff><FONT
size=2>您的位置：技术园地>技术讲座-GSM蜂窝移动通信系统 </FONT></TD></TR>
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<DIV align=center><FONT color=#000080 size=5><B><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Times New Roman; mso-hansi-font-family: Times New Roman">第八讲</SPAN><SPAN
lang=EN-US style="mso-spacerun: yes"> </SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Times New Roman; mso-hansi-font-family: Times New Roman">呼叫处理</SPAN></B><SPAN
lang=EN-US><SPAN style="mso-spacerun: yes"> (1-2)
</SPAN></SPAN></FONT><SPAN lang=EN-US
style="FONT-SIZE: 12pt"><O:P></O:P></SPAN></DIV></TD></TR>
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<P class=MsoNormal style="LINE-HEIGHT: 150%"><SPAN lang=EN-US
style="FONT-SIZE: 12pt"><A name="8.1 客户状态"><B>8.1<SPAN
style="mso-spacerun: yes"> </SPAN></B></A></SPAN><B><A
name="8.1 客户状态"><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">客户状态</SPAN></A></B></P>
<P class=MsoNormal style="LINE-HEIGHT: 150%"><SPAN lang=EN-US
style="FONT-SIZE: 12pt; mso-spacerun: yes">
</SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><FONT
face=楷体_GB2312 color=#000066>移动台客户状态一般是处于</FONT></SPAN><FONT
face=楷体_GB2312 color=#000066><SPAN lang=EN-US
style="FONT-SIZE: 12pt">MS(</SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">客户</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 12pt">)</SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">开机</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 12pt">(</SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">空闲状态</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 12pt">)</SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 12pt">MS</SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">关机和</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 12pt">MS</SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">忙三<BR>种状态之一，因此网路需要对这三种状态做相应处理。</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 12pt"><O:P> </O:P></SPAN></FONT></P>
<P class=MsoNormal style="LINE-HEIGHT: 150%"><SPAN lang=EN-US
style="FONT-SIZE: 12pt"><SPAN
style="mso-spacerun: yes"> </SPAN><FONT
color=#0000cc>(1)<SPAN style="mso-spacerun: yes">
</SPAN>MS</FONT></SPAN><FONT color=#0000cc><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">开机，网路对它作“附着”标记。</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 12pt"><O:P> </O:P></SPAN></FONT><SPAN
lang=EN-US style="FONT-SIZE: 12pt"><O:P></O:P></SPAN></P>
<P class=MsoNormal style="LINE-HEIGHT: 150%"><SPAN lang=EN-US
style="FONT-SIZE: 12pt; mso-spacerun: yes"> </SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><FONT
face=楷体_GB2312 color=#000066>当移动台开机</FONT></SPAN><FONT
face=楷体_GB2312 color=#000066><SPAN lang=EN-US
style="FONT-SIZE: 12pt">(</SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">打开电源</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 12pt">)</SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">后，它首先要在空中接口上搜索以找到正确的频率，并依靠搜索到的正确频率校正和同步频率，并将此频率锁定。该频率载有广播信息和可能的寻呼信息。</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 12pt"><O:P>
</O:P><O:P></O:P></SPAN></FONT><FONT color=#000066><SPAN lang=EN-US
style="FONT-SIZE: 12pt"><O:P></O:P></SPAN></FONT><SPAN lang=EN-US
style="FONT-SIZE: 12pt"><O:P></O:P></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 24pt; LINE-HEIGHT: 150%"><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><FONT
face=楷体_GB2312 color=#000066>若</FONT></SPAN><FONT face=楷体_GB2312
color=#000066><SPAN lang=EN-US
style="FONT-SIZE: 12pt">MS</SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">是第一次开机，在其数据存储器</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 12pt">(SIM</SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">卡</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 12pt">)</SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中找不到原来的位置区识别码</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 12pt">(LAI)</SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，它就立即要求接入网路，向</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 12pt">MSC</SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">发送“位置更新请求”消息，通知</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 12pt">GSM</SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">系统这是一个此位置区内的新客户，如图</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 12pt">8</SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">－</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 12pt">1</SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">所示，</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 12pt">MSC</SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">根据该客户发送的</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 12pt">IMSI</SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中的</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 12pt">H<SUB>l</SUB>H<SUB>2</SUB>H<SUB>3</SUB></SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">消息，向该客户的归属位置寄存器</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 12pt">(HLR)</SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">发送“位置更新请求”，</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 12pt">HLR</SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">记录发请求的</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 12pt">MSC</SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">号码</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 12pt">(</SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">即</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 12pt">M<SUB>1</SUB>M<SUB>2</SUB>M<SUB>3</SUB>)</SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，并向</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 12pt">MSC</SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">回送“位置更新接受”消息，至此</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 12pt">MSC</SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">认为此</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 12pt">MS</SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">已被激活，在拜访位置寄存器</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 12pt">(VLR)</SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中对该客户对应的</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 12pt">IMSI</SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">上作“附着”标记，再向</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 12pt">MS</SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">发送“位置更新证实”消息，</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 12pt">MS</SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的</SPAN><SPAN
lang=EN-US style="FONT-SIZE: 12pt">SIM</SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">卡记录此位置区识别码。</SPAN></FONT></P>
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