Chapter 14

Connectivity enhancements


The rapid increase in smartphone applications has led to packet-data traffic that is often highly bursty, with occasional periods of transmission activity. From a user performance perspective, it is advantageous to keep the HS-DSCH and E-DCH configured to be able to rapidly transmit any user data. At the same time, maintaining the connection in uplink and downlink comes at a cost. To reduce UE power consumption, WCDMA has several states: URA_PCH, CELL_PCH, CELL_FACH, CELL_DCH, and idle mode. So-called Continuous Packet Connectivity reduces the impact of CELL_DCH, but for some types of smartphone interaction, even when Continuous Packet Connectivity is applied, CELL_DCH is still a relatively ...

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