Title:
アップリンクにおいて多重アンテナ送信の送信電力制御を行うための方法および装置
Document Type and Number:
Japanese Patent JP2013507071
Kind Code:
A
Abstract:
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.
Inventors:
Benoit peltier
Luzin Tsai
Chang Hong
Luzin Tsai
Chang Hong
Application Number:
JP2012532367A
Publication Date:
February 28, 2013
Filing Date:
October 01, 2010
Export Citation:
Assignee:
Interdigital Patent Holdings Inc.
International Classes:
H04W52/30; H04B1/04; H04B7/04; H04B7/06; H04W16/28
Domestic Patent References:
| JP2009502102A | 2009-01-22 | |||
| JP2004247798A | 2004-09-02 | |||
| JP2006520109A | 2006-08-31 | |||
| JP2005347922A | 2005-12-15 | |||
| JP2009502102A | 2009-01-22 | |||
| JP2004247798A | 2004-09-02 | |||
| JP2006520109A | 2006-08-31 |
Foreign References:
| WO2008088535A1 | 2008-07-24 | |||
| US20080051045A1 | 2008-02-28 | |||
| WO2008088535A1 | 2008-07-24 |
Other References:
JPN6013041414; ３ＧＰＰ ＴＳ ２５．２１３ Ｖ８．４．０ , 200903, ｐ．１１-１７
JPN6013041415; ３ＧＰＰ ＴＳ ２５．２１４ Ｖ８．７．０ , 200909, ｐ．２６-３２
JPN6013041414; ３ＧＰＰ ＴＳ ２５．２１３ Ｖ８．４．０ , 200903, ｐ．１１-１７
JPN6013041415; ３ＧＰＰ ＴＳ ２５．２１４ Ｖ８．７．０ , 200909, ｐ．２６-３２
JPN6013041414; ３ＧＰＰ ＴＳ ２５．２１３ Ｖ８．４．０ , 200903, ｐ．１１-１７
Attorney, Agent or Firm:
Patent Business Corporation Tani/Abe Patent Office