diff -r 000000000000 -r 89d6a7a84779 Symbian3/SDK/Source/GUID-0E0D4E95-470F-54BE-8DCB-719976C8B84C.dita --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Symbian3/SDK/Source/GUID-0E0D4E95-470F-54BE-8DCB-719976C8B84C.dita Thu Jan 21 18:18:20 2010 +0000 @@ -0,0 +1,55 @@ + + + + + +What +is Contention Management?This topic describes contention management and the contention management +process flow. +

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.

+
Contention Management Process Flow

This section +outlines the contention management process flow and the associate components.

The +following diagram describes the Contention Management Process Flow.

The following steps describe what happens when a PDP context contention issue +occurs in the system:

    +

  1. The PDP Meta-Connection Provider (MCPR) of the starting connection +calls the HandleContentionL function of the PDP Tier Manager.

    2. +

  2. The PDP Tier Manager has an iPDPContentionManagement instance +of the CPDPContentionManagement class. The contention request +is added to iPDPContentionManagement.

    3. +

  3. 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.

    4. +

  4. The existing connection priorities are compared with the new connection +priority and one of the following occurs:

    5. +

  5. If the priority of the new connection is lower than those of the existing +connection, the new connection is not permitted.

    6. +

  6. 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.

    7. +

  7. Each connection relates to a single application on the mobile device. +One of the following occurs when the connection and application is terminated:

    8. +

  8. If the application that uses the stopped connection is contention-aware +it calls RConnection::Start() with the TConnAutStartPref parameter. +The application starts when the contention is finished.

    9. +

  9. 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.

    10. +
+ +What is Contention? + +What are +Access Point Priorities? + \ No newline at end of file