Title:
CLOSED-LOOP ANTENNA SELECTION FOR A SINGLE TRANSMITTER WIRELESS DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/060190
Kind Code:
A1
Abstract:
This application describes mechanisms to manage closed-loop antenna selection for a wireless device. The wireless device transmits sounding reference signal (SRS) resources configured by a cellular wireless network in an SRS resource set and receive SRS indicator (SRI) values to indicate antennas for subsequent uplink transmission of one or more physical layer channels by the wireless device, including a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), and a physical random access channel (PRACH). The wireless device supplements the closed-loop antenna selection with an open-loop antenna selection and uses the open-loop antenna selection for non-PUSCH channels when a most recently SRI value can be considered stale. SRI-based closed-loop antenna selection is extended to frequency division duplexing (FDD) bands. Transmit precoding matrix indicator (TPMI) group values are also used to indicate differential transmit power capabilities of various antennas of the wireless device to the cellular wireless network.
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Inventors:
ZHANG LIJIE (US)
KAVURI LAKSHMI N (US)
CUI LELE (US)
TU XIAOLONG (US)
WANG ZHIWEI (US)
KAVURI LAKSHMI N (US)
CUI LELE (US)
TU XIAOLONG (US)
WANG ZHIWEI (US)
Application Number:
PCT/CN2022/120816
Publication Date:
March 28, 2024
Filing Date:
September 23, 2022
Export Citation:
Assignee:
APPLE INC (US)
ZHANG LIJIE (US)
ZHANG LIJIE (US)
International Classes:
H04L25/02; H04W72/04
Foreign References:
| US20190199553A1 | 2019-06-27 | |||
| CN110071749A | 2019-07-30 | |||
| US20210013947A1 | 2021-01-14 |
Other References:
NOKIA, NOKIA SHANGHAI BELL: "UE capabilities for UL full power modes", 3GPP TSG-RAN WG2 MEETING #117 ELECTRONIC, R2-2203268, 14 February 2022 (2022-02-14), XP052111077
Attorney, Agent or Firm:
CCPIT PATENT AND TRADEMARK LAW OFFICE (CN)
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