System and method for uplink multiple input multiple output transmission

Patent metadata

Field	Value
Publication number	US-8929475-B2
Application number	US-201313957242-A
Country	US
Kind code	B2
Filing date	Aug 1, 2013
Priority date	Aug 3, 2012
Publication date	Jan 6, 2015
Grant date	Jan 6, 2015

Abstract

Methods and apparatuses are provided for uplink MIMO transmissions in a wireless communication system. In some particular aspects, an E-TFC selection process for selecting a transport format combination for an uplink MIMO transmission may take certain steps in the case that a UE is power- or buffer-limited. For example, in a rank 2 transmission, non-scheduled data is allocated only to the primary stream. If the allocated non-scheduled data is less than the determined primary stream transport block size, scheduled data is allocated to the primary stream in an amount not to exceed the determined primary stream TBS. Finally, scheduled data is allocated to the secondary stream in an amount not to exceed the determined secondary stream TBS.

First claim

What is claimed is:

1. A method of configuring an uplink multiple-input multiple-output (MIMO) transmission at a wireless user equipment (UE), comprising:
receiving an absolute grant for the uplink MIMO transmission, comprising a first grant for scheduled data and at least one second grant for non-scheduled data;
determining a primary stream transport block size (TBS) and a secondary stream TBS;
determining a power level for both a primary stream and a secondary stream;
allo…

Assignees

• Qualcomm Inc

Inventors

• Akkarakaran Sony J
• Bharadwaj Arjun
• Sambhwani Sharad Deepak
• Agarwal Ravi

Classifications

• H04B7/0413 Primary

  Electricity · mapped topic

• H04B7/0404 Primary

  Electricity · mapped topic

• H04B7/0617

  Electricity · mapped topic

• H04B7/0619

  Electricity · mapped topic

• H04L1/1822

  Electricity · mapped topic