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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 size=4><B><SPAN
style="FONT-SIZE: 15pt; COLOR: navy; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman'"><SPAN
lang=EN-US>第七讲 SIM卡<O:P> (3)</O:P></SPAN></SPAN></B></FONT></DIV></TD></TR>
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style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><B>7.3<SPAN
style="mso-spacerun: yes"> </SPAN>SIM卡功能<O:P>
</O:P></B></SPAN></P>
<P class=MsoNormal
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style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"> <FONT
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</SPAN><FONT color=#000066><B><FONT color=#0099cc>1．功能简介<O:P>
</O:P></FONT><O:P></O:P></B><O:P></O:P></FONT></FONT></SPAN></P>
<P class=MsoNormal
style="MARGIN-TOP: 0px; TEXT-JUSTIFY: inter-ideograph; MARGIN-BOTTOM: 0px; TEXT-ALIGN: justify"><FONT
color=#000066><SPAN lang=EN-US
style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><FONT
size=3><SPAN
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</SPAN><FONT
face=楷体_GB2312>SIM卡的主要完成两种功能：存储数据(控制存取各种数据)和在安全条件<BR>下(个人身份号码PIN、鉴权钥Ki正确)完成客户身份鉴权和客户信息加密算法的<BR>全过程。<O:P>
</O:P></FONT><O:P></O:P></FONT></SPAN></FONT></P>
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style="MARGIN-TOP: 0px; TEXT-JUSTIFY: inter-ideograph; MARGIN-BOTTOM: 0px; TEXT-ALIGN: justify"><FONT
color=#000066><SPAN lang=EN-US
style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><FONT
size=3><SPAN
style="FONT-FAMILY: 宋体; mso-hansi-font-family: Times New Roman; mso-spacerun: yes">
</SPAN><FONT
face=楷体_GB2312>此功能主要是由SIM卡内的一部具有操作系统的微处理机完成。芯片有八个触点，与移动台设备相互接通是在卡插入设备中接通电源后完成。此时，操作系统和指令设置可以为SIM提供智能特性。</FONT><O:P>
</O:P></FONT></SPAN></FONT></P>
<P class=MsoNormal
style="MARGIN-TOP: 0px; TEXT-JUSTIFY: inter-ideograph; MARGIN-BOTTOM: 0px; TEXT-INDENT: 21pt; TEXT-ALIGN: justify"><FONT
color=#000066><SPAN lang=EN-US
style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><FONT
face=楷体_GB2312
size=3>SIM卡智能特性的逻辑结构是树型结构。全部特性参数信息都是用数据字段方式表达，如图7-2所示。即在根目录下有三个应用目录，一个属于行政主管部门应用目录，两个属于技术管理的应用目录，分别是GSM应用目录和电信应用目录。所有的目录下均为数据字段，有二进制的和格式化的数据字段。数据字段中的信息有的是永存性的即不能更新的，有的是暂存的，需要更新的。每个数据字段都要表达出它的用途、更新程度、数据字段的特性(如识别符)、类型是二进制的还是格式化的等。</FONT></SPAN></FONT><FONT
face=楷体_GB2312><SPAN lang=EN-US
style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><FONT
size=3><O:P> </O:P></FONT></SPAN></FONT><SPAN lang=EN-US
style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><FONT
size=3><O:P></O:P></FONT></SPAN></P>
<P class=MsoNormal
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lang=EN-US
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size=3><O:P></O:P></FONT></SPAN></P>
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<IMG height=189 src="g7-3.files/g7-3.H41.gif" width=345
v:shapes="_x0000_i1025"><O:P> </O:P></FONT></SPAN></P>
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align=center><SPAN
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face=楷体_GB2312 color=#000066 size=3>图<SPAN lang=EN-US>7-2<SPAN
style="mso-spacerun: yes"> </SPAN>SIM卡存储配置<O:P>
</O:P></SPAN></FONT><FONT color=#000066 size=3><SPAN
lang=EN-US><O:P></O:P></SPAN></FONT><FONT size=3><SPAN
lang=EN-US><O:P></O:P></SPAN></FONT></SPAN></P>
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align=center><SPAN
style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><FONT
size=3><SPAN lang=EN-US><O:P></O:P></SPAN></FONT></SPAN></P>
<P class=MsoNormal
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lang=EN-US
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size=3><SPAN
style="FONT-FAMILY: 宋体; mso-hansi-font-family: Times New Roman; mso-spacerun: yes">
</SPAN><FONT face=楷体_GB2312
color=#000066>SIM卡除了存储正常的数据字段，也存储有非文件字段，如鉴权钥、个人身份鉴权号码、个人解锁码等数据。<O:P>
</O:P></FONT></FONT></SPAN></P>
<P class=MsoNormal
style="MARGIN-TOP: 0px; TEXT-JUSTIFY: inter-ideograph; MARGIN-BOTTOM: 0px; TEXT-INDENT: 21pt; TEXT-ALIGN: justify"><FONT
color=#000066><SPAN lang=EN-US
style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><FONT
face=楷体_GB2312
size=3>SIM卡是随着GSM阶段实施，开发其阶段性的功能。通常在第二阶段所建议的功能都是在第一阶段的基础上建立的，因而第二阶段的SIM卡也适用于第一阶段。<O:P>
</O:P></FONT></SPAN></FONT></P>
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color=#000066><SPAN lang=EN-US
style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><FONT
size=3><O:P></O:P></FONT></SPAN></FONT></P>
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color=#000066><SPAN lang=EN-US
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size=3> <O:P> </O:P></FONT></SPAN></FONT></P>
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color=#000066><SPAN lang=EN-US
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</SPAN><B><FONT color=#0099cc>2．功能配置<O:P>
</O:P></FONT><O:P></O:P></B><O:P></O:P></FONT></SPAN></FONT></P>
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color=#000066><SPAN lang=EN-US
style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><FONT
color=#0000cc size=3>(1) 业务表<O:P> </O:P></FONT><FONT
size=3><O:P></O:P></FONT></SPAN></FONT></P>
<P class=MsoNormal
style="MARGIN-TOP: 0px; TEXT-JUSTIFY: inter-ideograph; MARGIN-BOTTOM: 0px; TEXT-ALIGN: justify"><FONT
color=#000066><SPAN lang=EN-US
style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><FONT
size=3><SPAN
style="FONT-FAMILY: 宋体; mso-hansi-font-family: Times New Roman; mso-spacerun: yes">
</SPAN><FONT face=楷体_GB2312>这种功能在图7-2中所配置的数据字段为6F38，用于识别在
SIM卡中已分配的和已激活的业务。这些业务是移动开发所需要的业务，如电信目录下的各种业务。<O:P>
</O:P></FONT></FONT></SPAN></FONT></P>
<P class=MsoNormal
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<P class=MsoNormal
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color=#000066><SPAN lang=EN-US
style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><FONT
size=3><SPAN
style="FONT-FAMILY: 宋体; mso-hansi-font-family: Times New Roman; mso-spacerun: yes">
</SPAN><FONT color=#0000cc>(2) 国际移动开发识别(IMSI)<O:P>
</O:P></FONT><O:P></O:P></FONT></SPAN></FONT></P>
<P class=MsoNormal
style="MARGIN-TOP: 0px; TEXT-JUSTIFY: inter-ideograph; MARGIN-BOTTOM: 0px; TEXT-ALIGN: justify"><FONT
color=#000066><SPAN lang=EN-US
style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><FONT
size=3><SPAN
style="FONT-FAMILY: 宋体; mso-hansi-font-family: Times New Roman; mso-spacerun: yes">
</SPAN><FONT
face=楷体_GB2312>这种功能在图7-2中所配置的数据字段为6F07，是用于存储国际移动开发身份的字段。IMSI最长可由15位设置组成，每位数字需4比特容量，共需9字节容量。为了它的安全性，则在空中接口传输一次，以后均由可变化的TMSI来替代。<O:P><BR><BR>
</O:P></FONT></FONT></SPAN></FONT></P>
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