114 lines
14 KiB
HTML
Executable File
114 lines
14 KiB
HTML
Executable File
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<h1 class="p_Heading1"><span class="f_Heading1">Enabling TMSI Reallocation</span></h1>
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<table style="width:100%;border:none;border-spacing:0px"><tr style="vertical-align:top"><td style="text-align:left;padding:5px">
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<p style="background: #99ccff;"><span style="font-weight: bold;">Descriptions</span></p>
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<p class="p_NoramlTest"><span class="f_NoramlTest"> </span></p>
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<p class="p_NoramlTest" style="line-height: 1.50;"><span class="f_NoramlTest">The TMSI (Temporary Mobile Subscriber Identity) reallocation function periodically assigns a new TMSI to a mobile subscriber. The purpose of this function is to prevent an intruder from identifying a mobile subscriber by listening to the signaling on the radio path. To increase confidentiality, the TMSI is reallocated at particular moments in time.</span></p>
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<p class="p_NoramlTest"><span class="f_NoramlTest"> </span></p>
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<p style="line-height: 1.50; margin: 0px 12px 5px 12px;"><span class="f_NoramlTest">TMSI reallocation is performed in the following way:</span></p>
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<p style="text-align: left; padding: 0px 0px 0px 13px; margin: 0px 12px 5px 12px;"><span style="font-size:10pt; font-family: 'Arial Unicode MS','Lucida Sans Unicode','Arial';color:#000000;display:inline-block;width:13px;margin-left:-13px">•</span><span class="f_NoramlTest">The mobile subscriber sends the TMSI together with the location area identity (LAI) to the VLR when accessing the network, e.g. during a location update.</span></p><p style="text-align: left; padding: 0px 0px 0px 13px; margin: 0px 12px 5px 12px;"><span style="font-size:10pt; font-family: 'Arial Unicode MS','Lucida Sans Unicode','Arial';color:#000000;display:inline-block;width:13px;margin-left:-13px">•</span><span class="f_NoramlTest">The VLR allocates a new TMSI to the mobile subscriber and sends it in a coded form (ciphering) to the mobile subscriber.</span></p><p style="text-align: left; padding: 0px 0px 0px 13px; margin: 0px 12px 5px 12px;"><span style="font-size:10pt; font-family: 'Arial Unicode MS','Lucida Sans Unicode','Arial';color:#000000;display:inline-block;width:13px;margin-left:-13px">•</span><span class="f_NoramlTest">The mobile subscriber stores the new TMSI and sends an acknowledgment to the MSC/VLR to release the old TMSI in the subscriber database and within the TMSI/IMSI correlation table.</span></p><p class="p_NoramlTest"><span class="f_NoramlTest"> </span></p>
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<p class="p_NoramlTest" style="line-height: 1.50;"><span class="f_NoramlTest">To enable TMSI Reallocation, VLR parameters need to be configured on NSS side.</span></p>
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<p class="p_NoramlTest"><span class="f_NoramlTest"> </span></p>
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<p class="p_NoramlTest"><span class="f_NoramlTest"> </span></p>
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<p style="background: #99ccff;"><span style="font-weight: bold;">Implementation</span></p>
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<p class="p_NoramlTest"><span class="f_NoramlTest"> </span></p>
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<p class="p_NoramlTest"><img src="2_39_05.gif" width="493" height="21" alt="2_39_05" style="border:none" /></p>
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<p class="p_NoramlTest"><span class="f_NoramlTest"> </span></p>
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<div style="text-align: left; text-indent: 0px; padding: 0px 0px 0px 0px; margin: 0px 12px 0px 12px;"><table style="border:none;border-spacing:0px;padding:0px;line-height: normal;"><tr style="vertical-align:baseline"><td style="border:none;padding:0;width:18px"><img id="TOGGLE0186A1_ICON" src="hmtoggle_arrow1.gif" width="9" height="9" alt="hmtoggle_arrow1" style="border:none" /></td><td style="border:none;padding:0"><span class="f_NoramlTest"><a class="dropdown-toggle" style="font-size: 10pt; font-family: Arial; font-style: normal; font-weight: normal; color: #000000; background-color: transparent; text-decoration: none;" href="javascript:HMToggle('toggle','TOGGLE0186A1','TOGGLE0186A1_ICON')">Enable TMSI Reallocation</a></span></td></tr></table></div><p class="p_NoramlTest" style="text-indent: -18px; margin: 0px 12px 0px 30px;"><span class="f_NoramlTest"> </span></p>
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<div id="TOGGLE0186A1" style="text-align: left; text-indent: -18px; padding: 0px 0px 0px 0px; margin: 0px 12px 0px 30px;"><table style="width:99%; border:none; border-spacing:0px;">
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<td style="vertical-align:top; padding:0px;"><p style="text-align: left; padding: 0px 0px 0px 15px; margin: 0px 0px 0px 0px;"><span style="font-size:10pt; font-family: 'Arial';color:#003366;display:inline-block;width:15px;margin-left:-15px">1.</span><span style="color: #003366;">Go to EMS >Configuration >NSS >VLR.</span></p><p> </p>
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<p style="text-align: left; padding: 0px 0px 0px 15px; margin: 0px 0px 0px 0px;"><span style="font-size:10pt; font-family: 'Arial';color:#003366;display:inline-block;width:15px;margin-left:-15px">2.</span><span style="color: #003366;">Click the </span><img src="2_035.gif" width="49" height="18" alt="2_035" style="border:none" /><span style="color: #003366;"> button at the upper right corner.</span></p><p> </p>
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<p><img src="2_37_01.gif" width="380" height="21" alt="2_37_01" style="border:none" /></p>
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<p> </p>
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<p style="text-align: left; padding: 0px 0px 0px 15px; margin: 0px 0px 0px 0px;"><span style="font-size:10pt; font-family: 'Arial';color:#003366;display:inline-block;width:15px;margin-left:-15px">1.</span><span style="color: #003366;">On the </span><span style="font-weight: bold; color: #003366;">System</span><span style="color: #003366;"> tab, </span><span style="color: #003366;">configure the relevant parameters given in the following table.</span></p><p> </p>
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<p style="text-align: left; padding: 0px 0px 0px 15px; margin: 0px 0px 0px 0px;"><span style="font-size:10pt; font-family: 'Arial';color:#003366;display:inline-block;width:15px;margin-left:-15px">2.</span><span style="color: #003366;">Click the <img src="2_041.gif" width="34" height="18" alt="2_041" style="border:none" /> button to update parameters to application servers.</span></p><p> </p>
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<div style="text-align: left; text-indent: 0px; padding: 0px 0px 0px 0px; margin: 0px 0px 0px 0px;"><table style="width:99%; border-color:#c0ccd9 #003366 #003366 #c0ccd9; border-style:solid; border-width:1px; border-spacing:0px;">
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<tr style="text-align:left;vertical-align:top;">
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<td style="vertical-align:top; width:137px; height:13px; background-color:#ccffff; padding:2px; border-color:#003366 #c0ccd9 #c0ccd9 #003366; border-style:solid; border-width:1px;"><p style="margin: 0px 0px 3px 0px;"><span style="font-size: 9pt; color: #003366;">Sub-parameter</span></p>
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</td>
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<td style="vertical-align:top; width:384px; height:13px; background-color:#ccffff; padding:2px; border-color:#003366 #c0ccd9 #c0ccd9 #003366; border-style:solid; border-width:1px;"><p style="margin: 0px 0px 3px 0px;"><span style="font-size: 9pt; color: #003366;">Description (Click highlight SAVE after change)</span></p>
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</td>
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<td style="vertical-align:top; width:145px; height:13px; background-color:#ccffff; padding:2px; border-color:#003366 #c0ccd9 #c0ccd9 #003366; border-style:solid; border-width:1px;"><p style="margin: 0px 0px 3px 0px;"><span style="font-size: 9pt; color: #003366;">Recommended Value</span></p>
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<tr style="text-align:left;vertical-align:top;">
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<td style="vertical-align:top; width:137px; padding:2px; border-color:#003366 #c0ccd9 #c0ccd9 #003366; border-style:solid; border-width:1px;"><p style="margin: 0px 0px 3px 0px;"><span style="font-size: 9pt; color: #003366;">TMSI Allocation</span></p>
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</td>
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<td style="vertical-align:top; width:384px; padding:2px; border-color:#003366 #c0ccd9 #c0ccd9 #003366; border-style:solid; border-width:1px;"><p style="margin: 0px 0px 3px 0px;"><span style="font-size: 9pt; color: #003366;">TMSI allocation control flag:</span></p>
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<p style="text-align: left; padding: 0px 0px 0px 13px; margin: 0px 0px 3px 0px;"><span style="font-size:9pt; font-family: 'Arial Unicode MS','Lucida Sans Unicode','Arial';color:#003366;display:inline-block;width:13px;margin-left:-13px">•</span><span style="font-size: 9pt; color: #003366;">Disable: TMSI allocation is forbidden for all system subscribers.</span></p><p style="text-align: left; padding: 0px 0px 0px 13px; margin: 0px 0px 3px 0px;"><span style="font-size:9pt; font-family: 'Arial Unicode MS','Lucida Sans Unicode','Arial';color:#003366;display:inline-block;width:13px;margin-left:-13px">•</span><span style="font-size: 9pt; color: #003366;">Allocation: To allocate the exclusive TMSI to the same subscriber every time a call management service is requested.</span></p><p style="text-align: left; padding: 0px 0px 0px 13px; margin: 0px 0px 3px 0px;"><span style="font-size:9pt; font-family: 'Arial Unicode MS','Lucida Sans Unicode','Arial';color:#003366;display:inline-block;width:13px;margin-left:-13px">•</span><span style="font-size: 9pt; color: #003366;">Reallocation: To allocate a new TMSI every time a call management service is requested.</span></p></td>
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<td style="vertical-align:top; width:145px; padding:2px; border-color:#003366 #c0ccd9 #c0ccd9 #003366; border-style:solid; border-width:1px;"><p style="margin: 0px 0px 3px 0px;"><span style="font-size: 9pt; color: #003366;">Reallocation</span></p>
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</table>
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</div>
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<p> </p>
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<p> </p>
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</td>
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</table>
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<p class="p_NoramlTest" style="text-indent: -18px; margin: 0px 12px 0px 30px;"><span class="f_NoramlTest"> </span></p>
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<p style="background: #99ccff;"><span style="font-weight: bold;">See Also</span></p>
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<p> </p>
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<p style="text-align: left; padding: 0px 0px 0px 13px; margin: 0px 12px 0px 12px;"><span style="font-size:10pt; font-family: 'Arial Unicode MS','Lucida Sans Unicode','Arial';color:#000000;display:inline-block;width:13px;margin-left:-13px">•</span><span class="f_NoramlTest"><a href="2_38.htm" class="topiclink">Enable Ciphering</a></span></p><p class="p_NoramlTest"><span class="f_NoramlTest"> </span></p>
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<p style="text-align: left; padding: 0px 0px 0px 13px; margin: 0px 12px 0px 12px;"><span style="font-size:10pt; font-family: 'Arial Unicode MS','Lucida Sans Unicode','Arial';color:#000000;display:inline-block;width:13px;margin-left:-13px">•</span><span class="f_NoramlTest"><a href="2_37.htm" class="topiclink">Enable VLR Purge</a></span></p><p class="p_NoramlTest"><span class="f_NoramlTest"> </span></p>
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<p style="text-align: left; padding: 0px 0px 0px 13px; margin: 0px 12px 0px 12px;"><span style="font-size:10pt; font-family: 'Arial Unicode MS','Lucida Sans Unicode','Arial';color:#000000;display:inline-block;width:13px;margin-left:-13px">•</span><span class="f_NoramlTest"><a href="2_45.htm" class="topiclink">Enabling Equipment Identity Register</a></span></p><p class="p_NoramlTest"><span class="f_NoramlTest"> </span></p>
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<p style="text-align: left; padding: 0px 0px 0px 13px; margin: 0px 12px 0px 12px;"><span style="font-size:10pt; font-family: 'Arial Unicode MS','Lucida Sans Unicode','Arial';color:#000000;display:inline-block;width:13px;margin-left:-13px">•</span><span class="f_NoramlTest"><a href="2_2_1_1.htm" class="topiclink">Manage VLR Subscribers</a></span></p><p class="p_NoramlTest"><span class="f_NoramlTest"> </span></p>
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<p class="p_NoramlTest"><span class="f_NoramlTest"> </span></p>
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<p style="background: #99ccff;"><span style="font-weight: bold;">Return to</span></p>
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<p> </p>
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<p style="text-align: left; padding: 0px 0px 0px 13px; margin: 0px 12px 0px 12px;"><span style="font-size:10pt; font-family: 'Arial Unicode MS','Lucida Sans Unicode','Arial';color:#000000;display:inline-block;width:13px;margin-left:-13px">•</span><span class="f_NoramlTest"><a href="2_3.htm" class="topiclink">Tasks List</a></span></p><p class="p_NoramlTest"><span class="f_NoramlTest"> </span></p>
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<p style="text-align: left; padding: 0px 0px 0px 13px; margin: 0px 12px 0px 12px;"><span style="font-size:10pt; font-family: 'Arial Unicode MS','Lucida Sans Unicode','Arial';color:#000000;display:inline-block;width:13px;margin-left:-13px">•</span><span class="f_NoramlTest"><a href="2_1.htm" class="topiclink">Elements List</a></span></p><p class="p_NoramlTest"><span class="f_NoramlTest"> </span></p>
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<p> </p>
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<p> </p>
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<p style="text-align: right;"><span style="font-size: 8pt;">2.39</span></p>
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