17 E-DCH semi-persistent scheduling transmission in 1.28Mcps TDD

25.3193GPPEnhanced uplinkOverall descriptionStage 2TS

The E-DCH semi-persistent scheduling transmission is a mechanism that semi-persistent E-PUCH resources can be configured to a UE by a grant on E-AGCH. UE may transmit transport blocks on the semi-persistent E-PUCH resources without receiving other grants on E-AGCH.

E-DCH semi-persistent scheduling transmission mechanism is a configuration of CELL_DCH state, when the semi-persistent E-DCH resources are configured for a UE. And the semi-persistent E-DCH resources can be configured and reconfigured by a new format E-AGCH.

Furthermore, during the E-DCH semi-persistent scheduling transmission, Node B may allocate additional E-PUCH physical resource by legacy E-AGCH.

If the UE has both semi-persistent E-PUCH resources and legacy scheduling resources in the same TTI, UE shall only send data on legacy scheduling E-PUCH resources.

For 1.28 Mcps TDD Multi-Carrier E-DCH operation, the E-DCH semi-persistent scheduling transmission can be only configured on one uplink carrier.

17.1 Assignment/reassignment of semi-persistent E-PUCH resources for E-DCH semi-persistent scheduling transmission

For the E-DCH semi-persistent scheduling transmission, Node B sends the control commands on E-AGCH to assign/reassign the semi-persistent E-PUCH resources. If the UE receives these commands correctly, the UE should stop sending any data on the previous E-PUCH resources and begin to send data on the reallocated semi-persistent E-PUCH resources. The Node B checks the data on E-PUCH to judge whether the commands have been received by the UE correctly.

If the Node B determines the UE has received the E-AGCH commands correctly, it can schedule the previous semi-persistent E-PUCH resources to other users. Otherwise, it shall send the assignment/reassignment commands again.