17811997. CONTROL SIGNALING FOR UPLINK FREQUENCY SELECTIVE PRECODING simplified abstract (Apple Inc.)

CONTROL SIGNALING FOR UPLINK FREQUENCY SELECTIVE PRECODING

Organization Name

Apple Inc.

Inventor(s)

Yushu Zhang of Beijing (CN)

Chunhai Yao of Beijing (CN)

Chunxuan Ye of San Diego CA (US)

Dawei Zhang of Cupertino CA (US)

Haitong Sun of Cupertino CA (US)

Hong He of Cupertino CA (US)

Seyed Ali Akbar Fakoorian of San Diego CA (US)

Wei Zeng of Cupertino CA (US)

Weidong Yang of San Diego CA (US)

CONTROL SIGNALING FOR UPLINK FREQUENCY SELECTIVE PRECODING - A simplified explanation of the abstract

This abstract first appeared for US patent application 17811997 titled 'CONTROL SIGNALING FOR UPLINK FREQUENCY SELECTIVE PRECODING

Simplified Explanation

The patent application describes a system and method for uplink frequency selective precoding at a user equipment (UE) using control signaling. Here are the key points:

• The base station sends control signals to the UE indicating a transmission rank indicator (TRI), a wideband transmission precoder matrix indicator (TPMI), and one or more subband TPMIs.
• The base station informs the UE whether to use the wideband TPMI or a subband TPMI to precode a physical uplink shared channel (PUSCH) transmission from the UE to the base station.
• The UE applies the indicated subband TPMIs to subbands of the bandwidth in which the PUSCH can be transmitted.
• The methods take into account the UE's capability for non-coherent, partial-coherent, and/or coherent precoding.
• The methods also consider assigning TPMIs to subbands based on the UE's use of multiple transmission reception points (TRPs) for its transmission.

Potential applications of this technology:

• Wireless communication systems
• 5G and beyond networks
• Mobile devices and base stations

Problems solved by this technology:

• Efficient uplink transmission in wireless communication systems
• Optimized precoding techniques for better signal quality
• Adaptation to different UE capabilities and transmission scenarios

Benefits of this technology:

• Improved uplink transmission performance
• Enhanced spectral efficiency
• Better utilization of available bandwidth
• Increased capacity in wireless networks

Original Abstract Submitted

Systems and methods using control signaling for uplink frequency selective precoding at a user equipment (UE) are disclosed herein. A base station may indicate a transmission rank indicator (TRI), a wideband transmission precoder matrix indicator (TPMI), and one or more subband TPMI(s) to the UE. The base station may indicate, to the UE, whether to use the wideband TPMI or a subband TPMI to precode a physical uplink shared channel (PUSCH) transmission from the UE to the base station. The UE then precodes (and transmits) the PUSCH accordingly. Methods of UE application of the indicated subband TPMI(s) to subbands of the bandwidth in which a PUSCH may be transmitted are described. Methods accounting for a UE capability as to non-coherent, partial-coherent, and/or coherent precoding are described. Methods of assigning TPMI(s) to subbands in view of multiple transmission reception point (TRP) use by the UE for UE transmission are described.