3G/UMTS

  

 

 

 

HSUPA - MAC Layer Operation

 

Following is overal MAC layer operation between UTRAN and UE in HSUPA. Use this one as a framework and dig into the details as much as possible refering to other pages in this site.

 

Direction

Process/Event

UE --> NW

 Scheduling Information (SI)

NW

 UTRAN determines Serving Grant Value based on SI and UL Interference

UE <-- NW

 Serving Grant (T/P Ratio)

UE

 Determines Transport Block Size based on the Serving Grant and Dedicated Grant set by RNC

UE

 Generate a transport plock and send it to a specific HARQ process

UE --> NW

 E-DCH carrying the transport block

NW

 Decode UL Data and send Ack/Nack via HICH.

NW

 Demux and Reorder the received data and pass it to higher layer (RLC)