Introduction to 3G Mobile Communications
By Juha Korhonen

7.9: User Plane

7.9 User Plane

The lower layers of the U-plane are exactly the same as those of the C-plane (MAC and RLC). PDCP and BMC, however, exist only in the U-plane. The control of all the AS U-plane tasks is handled by the RRC. The U-plane is responsible for the transfer of user data, such as voice or application data, whereas the C-plane handles the control signaling and the overall resource management. See Figure 7.25.


Figure 7.25: WCDMA U-plane protocol stack.
Copyright Artech House, Inc. 2001 under license agreement with Books24x7
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