CN102577542A

5G,4G,3G

Title

Method And Apparatus For Transmit Power Control For Multiple Antenna Transmissions In The Uplink

Application Number:

CN20108044432

Publication Date:

11-07-2012

Current Assignee:

Family ID:

Application Date:

01-10-2010

Declaring Company:

Publication Country:

US

Priority Date:

02-10-2009

Title

Method And Apparatus For Transmit Power Control For Multiple Antenna Transmissions In The Uplink

Application Number:

CN20108044432

Family ID:

Publication Country:

US

Publication Date:

11-07-2012

Application Date:

01-10-2010

Priority Date:

02-10-2009

Current Assignee:

Declaring Company:

Abstract  Abstract

The invention claims technique used for transmission power control of uplink multi-antenna transmission. A wireless transmit/receive unit (WTRU) generates at least one input stream for transmission and applicating gain factor each channel. The gain factor is determined based on a reference channel power estimate. WTRU generats at lest two data flows of a plurality of transmission of multi-user and multi-antenna from the input stream and applying the weighting to data stream. Gain factor and/or weight is controlled so that the transmit power on each antenna is in a maximum allowed value. When said transmission power exceeds a any antenna under the largest permissible value the WTRU is capable of performing power. WTRU firstly reduces enhanced dedicated channel before other channel (E-DCH) dedicated physical data channel (E-DPDCH). For a plurality of E-DCH flows the WTRU be based on a plurality of the direct current transmission caused by the additional power offset factor calculates E-DPDCH power offset.

Techniques for transmit power control for multiple antenna transmissions in an uplink are disclosed. A wireless transmit/receive unit (WTRU) generates at least one input stream for transmission and applies a gain factor to each channel. The gain factor is determined based on a reference channel power estimate. The WTRU generates at least two data streams from the input stream for transmission via a plurality of antennas and applies weights to the data streams. The gain factor and/or the weights are controlled such that a transmit power on each antenna is within a maximum allowed value. The WTRU may perform power scaling on a condition that a transmit power on any antenna exceeds the maximum allowed value. The WTRU may scale down an enhanced dedicated channel (E-DCH) dedicated physical data channel (E-DPDCH) first before other channels. For multiple E-DCH streams the WTRU may calculate an E-DPDCH power offset based on an additional power offset factor due to multiple stream transmission.

Note:

The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)

The information in grey was provided by the patent holder

The information in purple was extracted from the FrandAvenue

Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.

Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.

Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.

Family member:related patents or applications that share a common priority or original filing.