1.1 WRFD-140222 Adaptive Adjustment of HSUPA Small Target RetransmissionsAvailabilityThis feature is available from RAN14.0.

SummaryThis feature dynamically adjusts the target number of retransmissions based on the uplink throughput of UEs and the uplink load on the serving cell. The purpose is to improve the uplink throughput of the serving cell.

BenefitsThis feature improves the system capacity in cases where multiple HSUPA UEs with a 10 ms transmission time interval (TTI) are uploading data in a cell with a limited uplink load.DescriptionWhen the uplink load is limited, a small target number of retransmissions will impose high requirements on the signal-to-interference ratio (SIR) on the Dedicated Physical Control Channel (DPCCH), and the DPCCH must use higher power. This leads to a decrease in the power of available data channels, a lower UE throughput, and a lower HSUPA cell throughput. The adaptive adjustment of HSUPA small target retransmissions feature has been introduced to address these problems. This feature supports an alternative small target number of retransmissions for each typical type of service. The actual target number of retransmissions can dynamically shift between the original fixed number and the alternative number depending on the throughput of UEs and the uplink load on the cell. This improves the system capacity when the uplink load is limited.

A cell can be simutaneouslly configured with the feature Adptive Adjustment of HSUPA Samll Target Retransmissions and the feature DC-HSUPA. However, if DC-HSUPA is enable for a UE, Adaptive Adjustment of HSUPA Small Target Retransmissions will not work for this UE.EnhancementNone

DependencyDependency on RNC hardwareNone

Dependency on NodeB hardwareNone

Dependency on the UENone

Dependency on other NEs

None

Dependency on the CNNoneDependency on other featuresThis feature depends on WRFD-010612 HSUPA Introduction Package.