US-20260129692-A1 - LINK ESTABLISHMENT PROCEDURES FOR ULTRA WIDEBAND SIDELINKS

US20260129692A1US 20260129692 A1US20260129692 A1US 20260129692A1US-20260129692-A1

Abstract

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may perform an initial pairing procedure with an extended reality (XR) device via a narrow band (NB) sidelink connection. The initial pairing procedure may establish an ultra wideband (UWB) sidelink connection between the UE and the XR device. The UE may transmit control signaling indicating a set of resources for the UWB sidelink connection. The set of resources may correspond to a local timeline for sidelink communications between the UE and the XR device. The UE may translate a cellular timeline for communications to generate the local timeline. The UE may transmit a triggering signal via the NB sidelink connection initiating sidelink communications between the UE and the XR device according to the local timeline for sidelink communications.

Inventors

Daniel PAZ
Michael Levitsky
Gideon Shlomo KUTZ
Tom BARAK

Assignees

QUALCOMM INCORPORATED

Dates

Publication Date: 20260507
Application Date: 20241107

Claims (20)

1 . A method for wireless communications at a user equipment (UE), comprising: performing an initial pairing procedure with an extended reality device via a narrow band, wherein the initial pairing procedure establishes an ultra wideband sidelink connection between the UE and the extended reality device; transmitting control signaling via the narrow band indicating one or more sidelink resources of the ultra wideband sidelink connection for the extended reality device, wherein a local timeline for sidelink communications between the UE and the extended reality device associated with the one or more sidelink resources is translated from cellular timeline corresponding to the ultra wideband sidelink connection; and transmitting a triggering signal, via the narrow band, initiating sidelink communications between the UE and the extended reality device via the one or more sidelink resources of the ultra wideband sidelink connection, the sidelink communications satisfying the local timeline according to the translation from the cellular timeline.
2 . The method of claim 1 , further comprising: receiving, from a network entity, an indication of a plurality of resources corresponding to the cellular timeline, the plurality of resources comprising the one or more sidelink resources; and translating the plurality of resources corresponding to the cellular timeline into the one or more sidelink resources that correspond to the local timeline for sidelink communications, wherein transmitting the control signaling indicating the one or more sidelink resources is based at least in part on the translation.
3 . The method of claim 2 , wherein the plurality of resources are allocated for sidelink communications between the UE and the extended reality device according to a periodic communication pattern, and the periodic communication pattern comprises a time-domain resource grid according to the cellular timeline.
4 . The method of claim 3 , wherein a first set of time durations of the periodic communication pattern correspond to the UE and the extended reality device, and a second set of time durations of the periodic communication pattern correspond to a second UE and a second extended reality device.
5 . The method of claim 1 , further comprising: performing, during a first available duration of time allocated to the UE and the extended reality device according to the local timeline, a synchronization loop procedure via the ultra wideband sidelink connection based at least in part on transmitting the triggering signal, wherein the synchronization loop procedure comprises a time synchronization and a frequency synchronization between the UE and the extended reality device; and communicating, during one or more second available durations of time allocated to the UE and the extended reality device according to the local timeline, one or more steady state sidelink communications between the UE and the extended reality device, wherein the one or more second available durations of time occur subsequent to the first available duration of time.
6 . The method of claim 5 , wherein the synchronization loop procedure further comprises: receiving one or more first uplink reference signals; transmitting one or more downlink reference signals in accordance with a loop refinement procedure based at least in part on the one or more first uplink reference signals; receiving one or more second uplink reference signals based at least in part on transmitting the one or more downlink reference signals; and performing a downlink equalization response evaluation procedure based at least in part on receiving the one or more second uplink reference signals, one or more synchronization loop corrections via downlink control signaling, or a combination thereof.
7 . The method of claim 5 , wherein the time synchronization further comprises: communicating a timeline synchronization message via the narrow band; and recommunicating the timeline synchronization message via the narrow band one or more times based at least in part on satisfying a timeline accuracy threshold.
8 . The method of claim 5 , further comprising: repeating the synchronization loop procedure one or more times until one or more accuracy thresholds are satisfied.
9 . The method of claim 1 , wherein the sidelink communications are activated semi-persistently based on the triggering signal and in accordance with the local timeline.
10 . The method of claim 1 , wherein performing the initial pairing procedure is based at least in part on a successful listen-before-talk procedure.
11 . The method of claim 1 , further comprising: sending one or more first transmissions via the one or more sidelink resources of the ultra wideband sidelink connection according to the local timeline; monitoring for one or more second transmissions via the one or more sidelink resources of the ultra wideband sidelink connection according to the local timeline; and retransmitting the triggering signal based at least in part on the monitoring.
12 . The method of claim 1 , further comprising: generating a pre-equalization matrix the sidelink communications based at least in part on a channel reciprocity state.
13 . The method of claim 12 , wherein generating the pre-equalization matrix further comprises: receiving one or more uplink channel estimation reference signals via an uplink channel, the uplink channel corresponding to the ultra wideband sidelink connection; performing an estimation of one or more characteristics of a downlink channel based at least in part on receiving the one or more uplink channel estimation reference signals; and performing the sidelink communications according to one or more equalization matrices based at least in part on performing an evaluation of the one or more equalization matrices and based at least in part on a channel reciprocity according to the channel reciprocity state.
14 . The method of claim 12 , wherein generating the pre-equalization matrix further comprises: transmitting one or more non-equalized downlink reference signals via a downlink channel, the downlink channel corresponding to the ultra wideband sidelink connection; receiving, in a next available uplink slot according to the local timeline, an indication of one or more samples of the one or more non-equalized downlink reference signals; performing an estimation of one or more characteristics of the downlink channel based at least in part on receiving the indication; and performing the sidelink communications according to one or more equalization matrices based at least in part on performing an evaluation of the one or more equalization matrices and based at least in part on a lack of channel reciprocity according to the channel reciprocity state.
15 . The method of claim 1 , further comprising: receiving, from a network entity, one or more reference clock signals, wherein the one or more reference clock signals are based on the cellular timeline, and wherein the extended reality device is synchronized with the cellular timeline based at least in part on the one or more reference clock signals.
16 . A method for wireless communications at an extended reality device, comprising: performing an initial pairing procedure with an extended reality device via a narrow band, wherein the initial pairing procedure establishes an ultra wideband sidelink connection between a user equipment (UE) and the extended reality device; receiving control signaling via the narrow band indicating one or more sidelink resources of the ultra wideband sidelink connection for the extended reality device, wherein a local timeline for sidelink communications between the UE and the extended reality device associated with the one or more sidelink resources is translated from cellular timeline corresponding to the ultra wideband sidelink connection; and receiving a triggering signal, via the narrow band, initiating sidelink communications between the UE and the extended reality device via the one or more sidelink resources of the ultra wideband sidelink connection, the sidelink communications satisfying the local timeline according to the translation from the cellular timeline.
17 . The method of claim 16 , further comprising: performing, during a first available duration of time allocated to the UE and the extended reality device according to the local timeline, a synchronization loop procedure via the ultra wideband sidelink connection based at least in part on receiving the triggering signal, wherein the synchronization loop procedure comprises a time synchronization and a frequency synchronization between the UE and the extended reality device; and communicating, during one or more second available durations of time allocated to the UE and the extended reality device according to the local timeline, one or more steady state sidelink communications between the UE and the extended reality device, wherein the one or more second available durations of time occur subsequent to the first available duration of time.
18 . The method of claim 17 , wherein the synchronization loop procedure further comprises: transmitting one or more first uplink reference signals; receiving one or more downlink reference signals in accordance with a loop refinement procedure based at least in part on the one or more first uplink reference signals; and transmitting one or more second uplink reference signals based at least in part on transmitting the one or more downlink reference signals.
19 . The method of claim 17 , wherein the time synchronization further comprises: communicating a timeline synchronization message via the narrow band; and recommunicating the timeline synchronization message via the narrow band one or more times based at least in part on satisfying a timeline accuracy threshold.
20 . The method of claim 17 , further comprising: repeating the synchronization loop procedure one or more times until one or more accuracy thresholds are satisfied.

Description

FIELD OF TECHNOLOGY The following relates to wireless communications, including link establishment procedures for ultra wideband sidelinks. BACKGROUND Wireless communications 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 (e.g., 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 communications system may include one or more base stations, each supporting wireless communication for communication devices, which may be known as user equipment (UE). 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. A method for wireless communications by a user equipment (UE) is described. The method may include performing an initial pairing procedure with an XR device via a narrow band (NB), where the initial pairing procedure establishes an ultra wideband (UWB) sidelink connection between the UE and the extended reality (XR) device, transmitting control signaling via the NB indicating one or more sidelink resources of the UWB sidelink connection for the XR device, where a local timeline for sidelink communications between the UE and the XR device associated with the one or more sidelink resources is translated from cellular timeline corresponding to the UWB sidelink connection, and transmitting a triggering signal, via the NB, initiating sidelink communications between the UE and the XR device via the one or more sidelink resources of the UWB sidelink connection, the sidelink communications satisfying the local timeline according to the translation from the cellular timeline. A UE for wireless communications is described. The UE may include one or more memories storing processor executable code, and one or more processors coupled with the one or more memories. The one or more processors may individually or collectively be operable to execute the code to cause the UE to perform an initial pairing procedure with an XR device via a NB, where the initial pairing procedure establishes an UWB sidelink connection between the UE and the XR device, transmit control signaling via the NB indicating one or more sidelink resources of the UWB sidelink connection for the XR device, where a local timeline for sidelink communications between the UE and the XR device associated with the one or more sidelink resources is translated from cellular timeline corresponding to the UWB sidelink connection, and transmit a triggering signal, via the NB, initiating sidelink communications between the UE and the XR device via the one or more sidelink resources of the UWB sidelink connection, the sidelink communications satisfying the local timeline according to the translation from the cellular timeline. Another UE for wireless communications is described. The UE may include means for performing an initial pairing procedure with an XR device via a NB, where the initial pairing procedure establishes an UWB sidelink connection between the UE and the XR device, means for transmitting control signaling via the NB indicating one or more sidelink resources of the UWB sidelink connection for the XR device, where a local timeline for sidelink communications between the UE and the XR device associated with the one or more sidelink resources is translated from cellular timeline corresponding to the UWB sidelink connection, and means for transmitting a triggering signal, via the NB, initiating sidelink communications between the UE and the XR device via the one or more sidelink resources of the UWB sidelink connection, the sidelink communications satisfying the local timeline according to the translation from the cellular timeline. A non-transitory computer-readable medium storing code for wireless communications is described. The code may include instructions executable by one or more processors to perform an initial pairing procedure with an XR device via a NB, where the initial pairing procedure establishes an UWB sidelink connection between the UE and the XR device, transmit control signaling via the NB indicating one or more sidelink resources of the UWB sidelink connection for the XR device, where a local timeline for sidelink communications between the UE and the XR d