3.Packet Technology of W-CDMA

One of several currently used packet transmission methods is common/dedicated channel switching, which provides a selection between common and dedicated channels depending on traffic characteristics for both the uplink and downlink. In low-traffic situations, the mobile terminal uses a common channel that is shared by multiple mobile terminals, whereas the DPCH (Dedicated Physical Channel) system allocates a dedicated channel to each mobile terminal in high-traffic situations. Another downlink packet transmission method is the DSCH (Downlink Shared Channel), which permits efficient transmissions by enabling radio resources to be shared by multiple terminals and by permitting the use of transmission power control. Discussions regarding higher information rates and greater efficiency for packet transmissions are still under way in the 3GPP (3rd-Generation Partnership Project).

A Scheme for packet transmission on Common channels/Dedicated channels

DSCH (Downlink Shared Channel)

Created 2001/03