US-20260129654-A1 - COORDINATION OF A DOWNLINK INTERRUPTION ASSOCIATED WITH AN UPLINK TRANSMISSION SWITCH FROM A FREQUENCY DIVISION DUPLEXING CARRIER TO A TIME DIVISION DUPLEXING CARRIER

Abstract

Methods, systems, and devices for wireless communication are described. Various aspects relate to signaling mechanisms according to which a user equipment (UE) and a network entity may coordinate on interruptions of downlink signaling, including interruptions associated with a temporary switch, at the UE, from a first carrier associated with a frequency division duplexing (FDD) communication scheme to a second carrier associated with a time division duplexing (TDD) communication scheme. In some examples, the UE may transmit, to the network entity, control signaling that includes an information element. The information element may include a first indication of an interruption of downlink signaling via the first carrier and a second indication of a duration of the interruption. In accordance with providing the first and second indications to the network entity, the UE may transmit uplink signaling via the second carrier within the duration of the interruption.

Inventors

• Morteza BANAGAR
• Pranay Sudeep RUNGTA
• Jianming Zhu
• Enoch Shiao-Kuang Lu
• Samirbhai MACWAN
• Tarandeep Virk
• Marc Azar
• Tae Sun Kim
• Mihir NABAR
• Lai Suen WAN

Assignees

• QUALCOMM INCORPORATED

Dates

Publication Date

20260507

Application Date

20251230

Claims (20)

1. 1 . A user equipment (UE), comprising: a processing system that includes processor circuitry and memory circuitry that stores code, the processing system configured to cause the UE to: transmit capability signaling to a network entity, the capability signaling indicating a capability of the UE to support uplink transmission switching between a first carrier via which the UE communicates in accordance with a frequency division duplexing (FDD) communication scheme and a second carrier via which the UE communicates in accordance with a time division duplexing (TDD) communication scheme; receive configuration signaling that indicates a carrier aggregation between the first carrier and the second carrier in accordance with the capability signaling; communicate, using at least a first antenna of the UE, with the network entity via the first carrier in accordance with the FDD communication scheme and, using a second antenna of the UE, with the network entity via the second carrier in accordance with the TDD communication scheme; transmit, using the first antenna of the UE, uplink signaling via the second carrier in accordance with switching both uplink transmission and downlink reception via the second carrier from the second antenna to the first antenna such that a signal path grouping at the UE is maintained; and receive, using the second antenna of the UE and simultaneously with transmitting the uplink signaling via the second carrier, downlink signaling via the first carrier in accordance with switching the uplink transmission and the downlink reception via the second carrier from the second antenna to the first antenna and in accordance with the signal path grouping at the UE.
2. 2 . The UE of claim 1 , wherein the signal path grouping comprises connecting the uplink transmission which is associated with one signal path and the downlink reception which is associated with another signal path together to at least one of the first antenna or the second antenna.
3. 3 . The UE of claim 1 , wherein a downlink throughput loss in accordance with switching the uplink transmission via the second carrier from the second antenna to the first antenna satisfies a threshold downlink throughput loss.
4. 4 . The UE of claim 1 , further comprising a first transmit chain and a first receive chain that are configured to communicate via the second carrier, wherein: the signal path grouping comprises a first connection between the first transmit chain and the first receive chain, the first transmit chain and the first receive chain are connected to the second antenna prior to the switching, and the first transmit chain and the first receive chain are connected to the first antenna after the switching in accordance with the first connection.
5. 5 . The UE of claim 4 , further comprising a second receive chain configured to communicate via the first carrier, wherein: the second receive chain is connected to the first antenna prior to the switching, and the second receive chain is connected to the second antenna after the switching in accordance with the signal path grouping.
6. 6 . The UE of claim 5 , further comprising a third receive chain configured to communicate via the second carrier, wherein: the signal path grouping comprises a second connection between the second receive chain and the third receive chain; the third receive chain is connected to the first antenna prior to the switching, and the third receive chain is connected to the second antenna after the switching based at least in part on switching both the second receive chain and the third receive chain to the second antenna in accordance with the second connection.
7. 7 . The UE of claim 4 , further comprising at least one of a second receive chain or a second transmit chain that is configured to communicate via the first carrier, wherein: the first connection is between the first transmit chain, the first receive chain, and at least the one of the second receive chain or the second transmit chain, at least the one of the second receive chain or the second transmit chain is connected to the second antenna prior to the switching, and at least the one of the second receive chain or the second transmit chain is connected to the first antenna after the switching based at least in part on switching at least the one of the second receive chain or the second transmit chain to the first antenna in accordance with the first connection.
8. 8 . The UE of claim 1 , wherein the uplink signaling is transmitted over one or more uplink slots, and wherein the processing system is further configured to cause the UE to: receive, using the first antenna of the UE, second downlink signaling via the second carrier over one or more downlink slots, wherein the UE receives the second downlink signaling without reprogramming a radio frequency front end switch between the one or more uplink slots and the one or more downlink slots.
9. 9 . The UE of claim 1 , wherein the first carrier comprises a mid-band carrier and the second carrier comprises a high-band carrier.
10. 10 . The UE of claim 1 , wherein the processing system is further configured to cause the UE to: transmit, to the network entity and based at least in part on satisfaction of one or more conditions, control signaling that comprises an information element, the information element comprising: a first indication of an interruption of second downlink signaling from the network entity to the UE via the first carrier, and a second indication of a duration of the interruption of the second downlink signaling, the duration of the interruption of the second downlink signaling associated with a temporary switch, at the UE, from the first carrier to the second carrier.
11. 11 . The UE of claim 10 , wherein the one or more conditions comprise an uplink throughput gain associated with the temporary switch satisfying a threshold uplink throughput gain, a downlink throughput loss associated with the temporary switch satisfying a threshold downlink throughout loss, or a priority level of second uplink signaling transmitted by the UE in accordance with the temporary switch satisfying a threshold priority level.
12. 12 . A method for wireless communication by a user equipment (UE), comprising: transmitting capability signaling to a network entity, the capability signaling indicating a capability of the UE to support uplink transmission switching between a first carrier via which the UE communicates in accordance with a frequency division duplexing (FDD) communication scheme and a second carrier via which the UE communicates in accordance with a time division duplexing (TDD) communication scheme; receiving configuration signaling that indicates a carrier aggregation between the first carrier and the second carrier in accordance with the capability signaling; communicating, using at least a first antenna of the UE, with the network entity via the first carrier in accordance with the FDD communication scheme and, using a second antenna of the UE, with the network entity via the second carrier in accordance with the TDD communication scheme; transmitting, using the first antenna of the UE, uplink signaling via the second carrier in accordance with switching both uplink transmission and downlink reception via the second carrier from the second antenna to the first antenna such that a signal path grouping at the UE is maintained; and receiving, using the second antenna of the UE and simultaneously with transmitting the uplink signaling via the second carrier, downlink signaling via the first carrier in accordance with switching the uplink transmission via the second carrier from the second antenna to the first antenna and in accordance with the signal path grouping at the UE.
13. 13 . The method of claim 12 , wherein the signal path grouping comprises connecting the uplink transmission which is associated with one signal path and the downlink reception which is associated with another signal path together to at least one of the first antenna or the second antenna.
14. 14 . The method of claim 12 , wherein a downlink throughput loss in accordance with switching the uplink transmission via the second carrier from the second antenna to the first antenna satisfies a threshold downlink throughput loss.
15. 15 . The method of claim 12 , wherein: the signal path grouping comprises a first connection between a first transmit chain and a first receive chain that are configured to communicate via the second carrier, the first transmit chain and the first receive chain are connected to the second antenna prior to the switching, and the first transmit chain and the first receive chain are connected to the first antenna after the switching in accordance with the first connection.
16. 16 . The method of claim 15 , wherein: a second receive chain configured to communicate via the first carrier is connected to the first antenna prior to the switching, and the second receive chain is connected to the second antenna after the switching in accordance with the signal path grouping.
17. 17 . The method of claim 16 , wherein: the signal path grouping comprises a second connection between the second receive chain and a third receive chain, the third receive chain configured to communicate via the second carrier is connected to the first antenna prior to the switching, and the third receive chain is connected to the second antenna after the switching based at least in part on switching both the second receive chain and the third receive chain to the second antenna in accordance with the second connection.
18. 18 . The method of claim 15 , wherein: the first connection is between the first transmit chain, the first receive chain, and at least one of a second receive chain or a second transmit chain that is configured to communicate via the first carrier, at least the one of the second receive chain or the second transmit chain is connected to the second antenna prior to the switching, and at least the one of the second receive chain or the second transmit chain is connected to the first antenna after the switching based at least in part on switching at least the one of the second receive chain or the second transmit chain to the first antenna in accordance with the signal path grouping.
19. 19 . The method of claim 12 , wherein the uplink signaling is transmitted over one or more uplink slots, the method further comprising: receiving, using the first antenna of the UE, second downlink signaling via the second carrier over one or more downlink slots, wherein the UE receives the second downlink signaling without reprogramming a radio frequency front end switch between the one or more uplink slots and the one or more downlink slots.
20. 20 . The method of claim 12 , wherein the first carrier comprises a mid-band carrier and the second carrier comprises a high-band carrier.

Description

CROSS REFERENCE The present Application for Patent is a continuation of U.S. patent application Ser. No. 18/937,741 by BANAGAR et al., entitled “COORDINATION OF A DOWNLINK INTERRUPTION ASSOCIATED WITH AN UPLINK TRANSMISSION SWITCH FROM A FREQUENCY DIVISION DUPLEXING CARRIER TO A TIME DIVISION DUPLEXING CARRIER,” filed Nov. 5, 2024, assigned to the assignee hereof, and expressly incorporated by reference in its entirety herein. TECHNICAL FIELD The following relates to wireless communication, including coordination of a downlink interruption associated with an uplink transmission switch from a frequency division duplexing (FDD) carrier to a time division duplexing (TDD) carrier. DESCRIPTION OF THE RELATED TECHNOLOGY Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (such as time, frequency, and power). Examples of such multiple-access systems include fourth generation (4G) systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems. These systems may employ technologies such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal FDMA (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple-access communication system may include one or more base stations, each supporting wireless communication for communication devices, which may be known as user equipment (UE). In some wireless communication systems, a UE may perform communication in accordance with a time division duplexing (TDD) communication scheme and/or a frequency division duplexing (FDD) communication scheme. In accordance with a TDD communication scheme, a UE (or any other wireless communication device capable of TDD) may use multiple time slots to separate transmission and reception via a same frequency (such as a same frequency band or channel). In accordance with an FDD communication scheme, a UE (or any other wireless communication device capable of FDD) may use different frequencies (such as different frequency bands or channels) to separate transmission and reception occurring simultaneously. In some systems, a UE may additionally support carrier aggregation, according to which the UE may communicate with a base station using multiple carriers. In some of such systems, the UE communicate in accordance with different communication schemes via different carriers. For example, the UE may communicate in accordance with an FDD communication scheme using a first carrier and may communicate in accordance with a TDD communication scheme using a second carrier. SUMMARY The systems, methods, and devices of this disclosure each have several innovative aspects, no single one of which is solely responsible for the desirable attributes disclosed herein. One innovative aspect of the subject matter described in this disclosure can be implemented in a user equipment (UE). The UE may include a processing system that includes processor circuitry and memory circuitry that stores code. The processing system may be configured to cause the UE to transmit control signaling that includes an information element to a network entity, the information element including a first indication of an interruption of downlink signaling from the network entity to the UE via a first carrier associated with a frequency division duplexing (FDD) communication scheme and including a second indication of a duration of the interruption of the downlink signaling, the duration of the interruption of the downlink signaling associated with a temporary switch, at the UE, from the first carrier associated with the FDD communication scheme to a second carrier associated with a time division duplexing (TDD) communication scheme, and transmit uplink signaling to the network entity via the second carrier associated with the TDD communication scheme within the duration of the interruption of the downlink signaling. Another innovative aspect of the subject matter described in this disclosure can be implemented in a method for wireless communication by or at a UE. The method may include transmitting control signaling that includes an information element to a network entity, the information element including a first indication of an interruption of downlink signaling from the network entity to the UE via a first carrier associated with an FDD communication scheme and including a second indication of a duration of the interruption of the downlink signaling, the duration of the interruption of the downlink signaling associated with a temporary switch, at the UE, from the first carrier associated with the