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<concept id="GUID-0E0D4E95-470F-54BE-8DCB-719976C8B84C" xml:lang="en"><title>What

is Contention Management?</title><shortdesc>This topic describes contention management and the contention management

process flow. </shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>

<p>When a contention issue arises the Access Point priorities of the incoming

connection and the existing connections are compared. If the incoming Access

Point has a higher priority than an existing Access Point the existing Access

Point connection is stopped and the new Access Point connection is started.

If the incoming Access Point priority is lower than or equal to an existing

Access Point connection the incoming Access Point is ignored. </p>

<section><title>Contention Management Process Flow</title> <p>This section

outlines the contention management process flow and the associate components. </p> <p>The

following diagram describes the Contention Management Process Flow. </p><p>The following steps describe what happens when a PDP context contention issue

occurs in the system: </p> <ol>

<li id="GUID-F614DD0D-491E-4E4A-B255-90A50B0CAB8E"><p>The PDP Meta-Connection Provider (MCPR) of the starting connection

calls the <codeph>HandleContentionL</codeph> function of the PDP Tier Manager.</p></li>

<li id="GUID-E77116E5-E364-47CF-9878-502DD869804A"><p>The PDP Tier Manager has an <codeph>iPDPContentionManagement</codeph> instance

of the <codeph>CPDPContentionManagement</codeph> class. The contention request

is added to <codeph>iPDPContentionManagement</codeph>. </p></li>

<li id="GUID-8DAF207F-3320-4DF4-A69E-9824DA800D12"><p>The ContentionManager starts processing the asynchronous contention

request. The priorities assigned to all active connections in the system are

extracted from the MCPR Access Points. The ContentionManager delivers the

extracted priorities to the Contention Management Activity. </p></li>

<li id="GUID-D1DD47FC-F6EA-4F00-A684-FE67DC02AE26"><p>The existing connection priorities are compared with the new connection

priority and one of the following occurs:</p></li>

<li id="GUID-0254D697-B9B0-4D24-8262-BB94C3294016"><p>If the priority of the new connection is lower than those of the existing

connection, the new connection is not permitted.</p></li>

<li id="GUID-D1A41F47-9CFA-4755-BA82-DC05E6F100A7"><p>If the priority of the new connection is higher than one of the existing

connections, the lowest priority connection is stopped and the new connection

is permitted and started.</p></li>

<li id="GUID-E4E8C34B-5305-46B3-AB17-F1CEB6BC741F"><p>Each connection relates to a single application on the mobile device.

One of the following occurs when the connection and application is terminated: </p></li>

<li id="GUID-54B99BA1-16C3-45FC-8400-C37F354B651A"><p>If the application that uses the stopped connection is contention-aware

it calls <codeph>RConnection::Start()</codeph> with the <codeph>TConnAutStartPref</codeph> parameter.

The application starts when the contention is finished.</p></li>

<li id="GUID-BD9CF0F3-D080-42AE-BA18-537E8DA9AD35"><p>If the application that uses the stopped connection is not contention-aware

a disconnection notification is sent to the user without an error message

stating why the connection stopped. </p></li>

</ol></section>

</conbody><related-links>

<link href="GUID-CD57B3EB-B8FD-53CE-B319-FB6275BE391E.dita"><linktext>What is Contention?</linktext>

</link>

<link href="GUID-FF81C5C5-09B7-5194-928E-0BA87417B2CD.dita"><linktext>What are

Access Point                 Priorities?</linktext></link>

</related-links></concept>