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) |