<p>The Mall should only have transient knowledge of the TIMSI, only so long as it sees the base station & mobile device maintaining their registration. (Every 10 minutes or so if I remember correctly.) Then the system can log that visitor N appeared at time X, and spent Y minutes in the Mall.</p>
<p>The number of mobile phone visitors can then be used as a proxy for footfall in the Mall, and the property company can justify the rent it charges. No personal or identifying data is needed.</p>
<p>Regards,<br>
Tony</p>
<div class="gmail_quote">On 23 Aug 2011 08:53, "John Wilson" <<a href="mailto:tugwilson@gmail.com">tugwilson@gmail.com</a>> wrote:<br type="attribution"></div>