Method and apparatus for improving uplink transmission mode configuration

Patent metadata

Field	Value
Publication number	US-9503231-B2
Application number	US-201113290979-A
Country	US
Kind code	B2
Filing date	Nov 7, 2011
Priority date	Nov 9, 2010
Publication date	Nov 22, 2016
Grant date	Nov 22, 2016

Abstract

A method, an apparatus, and a computer program product for wireless communication are provided in which a first message to reconfigure an uplink transmission mode of a user equipment (UE) from a first uplink transmission mode to a second uplink transmission mode is transmitted. Further, a reconfiguration scheme to assure at least one of two or more second messages are recognizable by the UE during a transition period after transmission of the first message is implemented. In another example, a UE and eNB may be equipped to respectively transmit and receive a first message to reconfigure a SRS mode used by a UE. In such an aspect the first message may respectively indicate and be used to determine an SRS transmission port specified in a field capable of indicating a number of SRS transmission ports that is greater than a number of physical UE antenna ports.

First claim

What is claimed is:

1. A method for wireless communications, comprising:
transmitting a first message to a user equipment (UE) having a number of physical UE antenna ports, the first message to reconfigure a sounding reference signal (SRS) mode used by the UE; and
indicating in a field in the first message, an SRS transmission port number out of a number of possible SRS transmission port numbers, wherein a first SRS transmission port number corresponds to a first integer that maps to a same antenna or antenna virtualization as a physical uplink shared channel (PUSCH) mode 1 single antenna transmission scheme 1 or 2 using PUSCH transmission port 0, a second SRS transmission port number corresponds to a second integer that maps to a same antenna or antenna virtualization as a PUSCH mode 2 multi-antenna transmission configured with a two-antenna (2Tx) antenna transmission scheme using PUSCH transmission port 0, a third SRS transmission port number corresponds to a third integer that maps to a same antenna or antenna virtualization as a PUSCH mode 2 multi-antenna transmission configured with a 2Tx antenna transmission scheme using PUSCH transmission port 1, a fourth SRS transmission port number corresponds to a fourth integer that maps to a same antenna or antenna virtualization as a PUSCH mode 2 multi-antenna transmission configured with a four-antenna (4Tx) antenna transmission scheme using PUSCH transmission port 0, a fifth SRS transmission port number corresponds to a fifth integer that maps to a same antenna or antenna virtualization as a PUSCH mode 2 multi-antenna transmission configured with a 4Tx antenna transmission scheme using PUSCH transmission port 1, a sixth SRS transmission port number corresponds to a sixth integer that maps to a same antenna or antenna virtualization as a PUSCH mode 2 multi-antenna transmission configured with a 4Tx antenna transmission scheme using PUSCH transmission port 2, and a seventh SRS transmission port number corresponds to a seventh integer that maps to a same antenna or antenna virtualization as a PUSCH mode 2 multi-antenna transmission configured with a 4Tx antenna transmission scheme using PUSCH transmission port 3.

2. The method of claim 1 , wherein the SRS mode is either aperiodic or periodic SRS.

3. The method of claim 1 , wherein the SRS mode is associated with either a first uplink transmission mode that uses a single antenna port or a second uplink transmission mode that uses multiple antennas ports.

4. The method of claim 1 , wherein the SRS mode relates to a timing of SRS transmissions.

5. A method for wireless communications of a user equipment (UE), comprising:
receiving a first message to reconfigure a sounding reference signal (SRS) mode used by the UE, the UE having a number of physical UE antenna ports; and
determining, in response to reception of the first message, an SRS transmission port number, the SRS transmission port number being one of a number of possible SRS transmission port numbers, wherein a first SRS transmission port number corresponds to a first integer that maps to a same antenna or antenna virtualization as a physical uplink shared channel (PUSCH) mode 1 single antenna transmission scheme 1 or 2 using PUSCH transmission port 0, a second SRS transmission port number corresponds to a second integer that maps to a same antenna or antenna virtualization as a PUSCH mode 2 multi-antenna transmission configured with a two-antenna (2Tx) antenna transmission scheme using PUSCH transmission port 0, a third SRS transmission port number corresponds to a third integer that maps to a same antenna or antenna virtualization as a PUSCH mode 2 multi-antenna transmission configured with a 2Tx antenna transmission scheme using PUSCH transmission port 1, a fourth SRS transmission port number corresponds to a fourth integer that maps to a same antenna or antenna virtualization as a PUSCH mode 2 multi-antenna transmission configured with a four-antenna (4Tx) antenna transmission scheme using PUSCH transmission port 0, a fifth SRS transmission port number corresponds to a fifth integer that maps to a same antenna or antenna virtualization as a PUSCH mode 2 multi-antenna transmission configured with a 4Tx antenna transmission scheme using PUSCH transmission port 1, a sixth SRS transmission port number corresponds to a sixth integer that maps to a same antenna or antenna virtualization as a PUSCH mode 2 multi-antenna transmission configured with a 4Tx antenna transmission scheme using PUSCH transmission port 2, and a seventh SRS transmission port number corresponds to a seventh integer that maps to a same antenna or antenna virtualization as a PUSCH mode 2 multi-antenna transmission configured with a 4Tx antenna transmission scheme using PUSCH transmission port 3.

6. The method of claim 5 , wherein the SRS mode is either aperiodic or periodic SRS.

7. The method of claim 5 , wherein the SRS mode is associated with either a first uplink transmission mode that uses a single antenna port or a second uplink transmission mode that uses multiple antennas ports.

8. The method of claim 5 , wherein the SRS mode relates to a timing of SRS transmissions.

9. An apparatus for wireless communications, comprising:
means for transmitting a first message to a user equipment (UE) having a number of physical UE antenna ports, the first message to reconfigure a sounding reference signal (SRS) mode used by the UE; and
means for indicating in a field in the first message, an SRS transmission port number out of a number of possible SRS transmission port numbers, wherein a first SRS transmission port number corresponds to a first integer that maps to a same antenna or antenna virtualization as a physical uplink shared channel (PUSCH) mode 1 single antenna transmission scheme 1 or 2 using PUSCH transmission port 0, a second SRS transmission port number corresponds to a second integer that maps to a same antenna or antenna virtualization as a PUSCH mode 2 multi-antenna transmission configured with a two-antenna (2Tx) antenna transmission scheme using PUSCH transmission port 0, a third SRS transmission port number corresponds to a third integer that maps to a same antenna or antenna virtualization as a PUSCH mode 2 multi-antenna transmission configured with a 2Tx antenna transmission scheme using PUSCH transmission port 1, a fourth SRS transmission port number corresponds to a fourth integer that maps to a same antenna or antenna virtualization as a PUSCH mode 2 multi-antenna transmission configured with a four-antenna (4Tx) antenna transmission scheme using PUSCH transmission port 0, a fifth SRS transmission port number corresponds to a fifth integer that maps to a same antenna or antenna virtualization as a PUSCH mode 2 multi-antenna transmission configured with a 4Tx antenna transmission scheme using PUSCH transmission port 1, a sixth SRS transmission port number corresponds to a sixth integer that maps to a same antenna or antenna virtualization as a PUSCH mode 2 multi-antenna transmission configured with a 4Tx antenna transmission scheme using PUSCH transmission port 2, and a seventh SRS transmission port number corresponds to a seventh integer that maps to a same antenna or antenna virtualization as a PUSCH mode 2 multi-antenna transmission configured with a 4Tx antenna transmission scheme using PUSCH transmission port 3.

10. The apparatus of claim 9 , wherein the SRS mode is either aperiodic or periodic SRS.

11. The apparatus of claim 9 , wherein the SRS mode is associated with either a first uplink transmission mode that uses a single antenna port or a second uplink transmission mode that uses multiple antennas ports.

12. An apparatus for wireless communications, comp

Assignees

• Gaal Peter
• Chen Wanshi
• Montojo Juan
• Qualcomm Inc

Inventors

• Gaal Peter
• Chen Wanshi
• Montojo Juan

Classifications

• H04B7/0404

  the mobile station comprising multiple antennas, e.g. to provide uplink diversity · CPC title

• H04B7/0689

  using different transmission schemes, at least one of them being a diversity transmission scheme · CPC title

• H04L5/0016

  Time-frequency-code · CPC title

• H04L5/0023 Primary

  Time-frequency-space · CPC title

• H04L5/0048

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title