US-12627341-B2 - Network-assisted beamforming

US12627341B2US 12627341 B2US12627341 B2US 12627341B2US-12627341-B2

Abstract

Aspects of the disclosure are directed to methods and techniques for wireless communication via non-codebook beam directions to allow dynamic beamforming using non-codebook beam directions. In certain aspects, a user equipment (UE) may obtain, from a wireless node, a plurality of reference signals (RSs) via one or more receive beams, wherein each of the one or more receive beams is characterized by one of a plurality of codebook beam directions. In certain aspects, the UE may estimate a first non-codebook beam direction of a transmit beam of the wireless node based on a measurement of one or more RSs of the plurality of RSs. In certain aspects, the UE may output a report comprising an indication of the first non-codebook beam direction for transmission to the wireless node.

Inventors

Hamed PEZESHKI
Arumugam Chendamarai Kannan
Tao Luo

Assignees

QUALCOMM INCORPORATED

Dates

Publication Date: 20260512
Application Date: 20230905

Claims (20)

1 . An apparatus configured for wireless communication, comprising: at least one transceiver; at least one memory comprising instructions; and one or more processors configured to execute the instructions to cause the apparatus to: receive, via the at least one transceiver and from a wireless node, a plurality of reference signals (RSs) via one or more receive beams, wherein each of the one or more receive beams is characterized by one of a plurality of codebook beam directions; estimate a first non-codebook beam direction of a transmit beam of the wireless node based on a measurement of one or more RSs of the plurality of RSs; estimate a second non-codebook beam direction of the transmit beam based on the measurement of one or more RSs; estimate a first coefficient based on a first strength of the first non-codebook beam direction and a second coefficient based on a second strength of the second non-codebook beam direction; and transmit, via the at least one transceiver and to the wireless node, a report comprising the first coefficient and the second coefficient.
2 . The apparatus of claim 1 , wherein the one or more processors are further configured to cause the apparatus to: receive, via the at least one transceiver, assistance information comprising an indication of the plurality of codebook beam directions, wherein the first non-codebook beam direction is further based on the assistance information.
3 . The apparatus of claim 1 , wherein the report further indicates a first angle of departure (AoD) of the first non-codebook beam direction, and a second AoD of the second non-codebook beam direction.
4 . The apparatus of claim 1 , wherein the one or more processors are further configured to cause the apparatus to: receive, via the at least one transceiver, instructions for configuring content of the report, wherein the instructions include at least one of: a type of information for indicating the first non-codebook beam direction, a quantity of non-codebook beam directions allowed in the report, or a granularity of the information for indicating the first non-codebook beam direction.
5 . The apparatus of claim 4 , wherein the type of information includes at least one of an angle of departure (AoD) of the first non-codebook beam direction, or a coefficient indicating a weight of the first non-codebook beam direction.
6 . The apparatus of claim 1 , wherein the one or more processors are further configured to cause the apparatus to: receive, via the at least one transceiver, an indication of a custom beam direction of the transmit beam after transmitting the report.
7 . The apparatus of claim 6 , wherein the one or more processors are further configured to cause the apparatus to: receive, via the at least one transceiver, signaling via a receive beam of the one or more receive beams, wherein a direction associated with the receive beam is defined by the second non-codebook beam direction.
8 . The apparatus of claim 1 , wherein the apparatus is configured to operate as a user equipment (UE).
9 . An apparatus configured for wireless communication, comprising: at least one transceiver; at least one memory comprising instructions; and one or more processors configured to execute the instructions to cause the apparatus to: transmit, via the at least one transceiver and to a wireless node, a plurality of reference signals (RSs) for transmission via one or more transmit beams, wherein each of the one or more transmit beams is characterized by one of a plurality of codebook beam directions; receive, via the at least one transceiver and from the wireless node, a report comprising a first coefficient based on a first strength of a first non-codebook beam direction estimated from a first one of the plurality of RSs and a second coefficient based on a second strength of a second non-codebook beam direction estimated from a second one of the plurality of RS; and estimate a custom beam direction of a transmit beam based on the report.
10 . The apparatus of claim 9 , wherein the one or more processors are further configured to cause the apparatus to: transmit, via the at least one transceiver, assistance information for transmission to the wireless node, the assistance information comprising an indication of the plurality of codebook beam directions.
11 . The apparatus of claim 9 , wherein the report further indicates a first angle of departure (AoD) of the first non-codebook beam direction, and a second AoD of the second non-codebook beam direction.
12 . The apparatus of claim 9 , wherein the one or more processors are further configured to cause the apparatus to: transmit, via the at least one transceiver, instructions for transmission to the wireless node, the instructions for configuring content of the report, wherein the instructions include at least one of: a type of information for indicating the first non-codebook beam direction, a quantity of non-codebook beam directions allowed in the report, or a granularity of the information for indicating the first non-codebook beam direction.
13 . The apparatus of claim 12 , wherein the type of information includes at least one of an angle of departure (AoD) of the first non-codebook beam direction, or a coefficient indicating a weight of the first non-codebook beam direction.
14 . The apparatus of claim 9 , wherein the one or more processors are further configured to cause the apparatus to: transmit, via the at least one transceiver, an indication of the custom beam direction of the transmit beam after receiving, via the at least one transceiver, the report.
15 . The apparatus of claim 14 , wherein the one or more processors are further configured to cause the apparatus to: transmit, via the at least one transceiver, for transmission via the transmit beam characterized by the custom beam direction, signaling to the wireless node.
16 . The apparatus of claim 9 , wherein the apparatus is configured to operate as a network entity.
17 . A method for wireless communications by a first wireless node, comprising: receiving, from a second wireless node, a plurality of reference signals (RSs) via one or more receive beams, wherein each of the one or more receive beams is characterized by one of a plurality of codebook beam directions; estimating a first non-codebook beam direction of a transmit beam of the second wireless node based on a measurement of one or more RSs of the plurality of RSs; estimating a second non-codebook beam direction of the transmit beam based on the measurement of one or more RSs; estimating a first coefficient based on a first strength of the first non-codebook beam direction and a second coefficient based on a second strength of the second non-codebook beam direction; and transmitting, to the second wireless node, a report comprising the first coefficient and the second coefficient.
18 . The method of claim 17 , further comprising: receiving assistance information comprising an indication of the plurality of codebook beam directions, wherein the first non-codebook beam direction is further based on the assistance information.
19 . The method of claim 17 , wherein the report further indicates a first angle of departure (AoD) of the first non-codebook beam direction, and a second AoD of the second non-codebook beam direction.
20 . The method of claim 17 , further comprising: receiving instructions for configuring content of the report, wherein the instructions include at least one of: a type of information for indicating the first non-codebook beam direction, a quantity of non-codebook beam directions allowed in the report, or a granularity of the information for indicating the first non-codebook beam direction.

Description

BACKGROUND Technical Field The present disclosure generally relates to communication systems, and more particularly, to network-assisted beamforming between wireless nodes. Introduction Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources. Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems. These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate on a municipal, national, regional, and even global level. An example telecommunication standard is 5G New Radio (NR). 5G NR is part of a continuous mobile broadband evolution promulgated by Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with Internet of Things (IoT)), and other requirements. 5G NR includes services associated with enhanced mobile broadband (eMBB), massive machine type communications (mMTC), and ultra-reliable low latency communications (URLLC). Some aspects of 5G NR may be based on the 4G Long Term Evolution (LTE) standard. There exists a need for further improvements in 5G NR technology. These improvements may also be applicable to other multi-access technologies and the telecommunication standards that employ these technologies. SUMMARY The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later. Certain aspects are directed to an apparatus configured for wireless communication. In some examples, the apparatus includes a memory comprising instructions and one or more processors configured to execute the instructions. In some examples, the one or more processors are configured to obtain, from a wireless node, a plurality of reference signals (RSS) via one or more receive beams, wherein each of the one or more receive beams is characterized by one of a plurality of codebook beam directions. In some examples, the one or more processors are configured to estimate a first non-codebook beam direction of a transmit beam of the wireless node based on a measurement of one or more RSs of the plurality of RSs. In some examples, the one or more processors are configured to output a report comprising an indication of the first non-codebook beam direction for transmission to the wireless node. Certain aspects are directed to a method for wireless communication at an apparatus. In some examples, the method includes obtaining, from a wireless node, a plurality of reference signals (RSs) via one or more receive beams, wherein each of the one or more receive beams is characterized by one of a plurality of codebook beam directions. In some examples, the method includes estimating a first non-codebook beam direction of a transmit beam of the wireless node based on a measurement of one or more RSs of the plurality of RSs. In some examples, the method includes outputting a report comprising an indication of the first non-codebook beam direction for transmission to the wireless node. Certain aspects are directed to an apparatus configured for wireless communication. In some examples, the apparatus includes means for obtaining, from a wireless node, a plurality of reference signals (RSS) via one or more receive beams, wherein each of the one or more receive beams is characterized by one of a plurality of codebook beam directions. In some examples, the apparatus includes means for estimating a first non-codebook beam direction of a transmit beam of the wireless node based on a measurement of one or more RSs of the plurality of RSs. In some examples, the apparatus includes means for outputting a report comprising an indication of the first non-codebook beam direction for transmission to the wireless node. Certain aspects are directed to a non-transitory computer-readable medium having instructions stored thereon that, when executed by an apparatus, cause the apparatus to perform operations. In some examples, the operations include obta