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This page describes the CD/CA-ICH, or Collision Detection with Channel Assignment Indicator Channel, with respect to the WCDMA/UMTS system.
The Collision Detection Channel Assignment Indicator channel (CD/CA-ICH) is a physical channel used to carry the CD Indicator (CDI) only if the CA (Channel Assignment) is not active, or the CD Indicator/CA Indicator (CDI/CAI) at the same time if the CA is active.
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Explore the multiple access techniques employed in UMTS (3G), including WCDMA, TD-CDMA, and TD-SCDMA, and learn how they enable efficient spectrum use.
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Learn about WCDMA RRC states (idle, connected) and procedures in UMTS. Covers cell selection, connection establishment, and state transitions.
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