Channel -HSUPA

New Transport And Physical Channels On The Uplink

E-DCH (Enhanced Dedicated Channel): Transport channel

- E-DPDCH (Enhanced Dedicated Physical Data Channel): Associated physical channel

- Carries user data

- Dedicated channel: each UE has its own dedicated E-DCH

- Always associated to a R99 DCH (Dedicated Channel)

- Supports OVSF: SF2 - SF256

E-DPCCH (Enhanced Dedicated Physical Control Channel)

- Transmits all the necessary information about the E-DPDCH in order to decode the data channel transmission

- Also carries “Happy bit” information to indicate if the user is content with the current data rate

- Spreading factor = 256

New Physical Channels On The Downlink

E-AGCH (Absolute Grant Channel)

- Transmits an absolute value of the Node B scheduler decision regarding UE Power. It sets up the absolute power level that user equipment must utilize during its transmission.

- Spreading factor = 256

E-RGCH (Relative Grant Channel)

- Communicates information regarding whether or not the user equipment needs the power level of the signal to be either increased or decreased.

E-HICH (H-ARQ Indicator Channel)

- Carries positive and negative acknowledgements for retransmission process

- Multiplexed with E-RGCH to a single downlink code channel of spreading factor 128

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