Wireless communication methods and equipment at user devices and base stations.

VN127611APending Publication Date: 2026-08-03QUALCOMM INC
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Patent Information

Application Number
VN1202604954
Authority / Receiving Office
VN · VN
Patent Type
Applications
Current Assignee / Owner
Priority Date
2020-03-24
Filing Date
2020-03-25
Publication Date
2026-08-03

AI Technical Summary

Technical Problem

In wireless communications, the scheduling of sounding reference signal (SRS) transmissions often requires multiple listen-before-talk (LBT) gaps, leading to reduced network efficiency and capacity due to the need for each user equipment (UE) to perform LBT procedures independently, especially when the number of UEs exceeds the available interlaced SRS resources.

Method used

The solution involves staggering SRS transmissions in frequency across multiple orthogonal frequency division multiplexing (OFDM) symbols, allowing multiple UEs to share a common LBT gap by configuring SRS resources across multiple OFDM symbols with non-uniform frequency offsets, and applying an orthogonal cover code (OCC) to enable concurrent SRS transmissions using the same frequency resources.

Benefits of technology

This approach enhances network efficiency and capacity by allowing multiple UEs to transmit SRS using a common LBT gap, reducing the need for additional LBT gaps and improving resource utilization, while maintaining a uniform combined comb structure and low peak-to-average power ratio (PAPR) for SRS transmissions.

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Abstract

The invention relates to a method and apparatus for wireless communication at user and base station equipment. Specifically, the proposed wireless communication techniques and apparatus involve the frequency-shifted arrangement of survey reference signals (SRS) across multiple orthogonal frequency division multiplexing (OFDM) symbols, which would allow multiple UEs to transmit SRS using a listen-before-talk (LBT) slot for the LBT procedure. The techniques also propose the transmission of SRS across multiple OFDM symbols using the same frequency resources, and an orthogonal cover code (OCC) could be applied to the SRS transmission of each OFDM symbol, which would allow multiple UEs to transmit SRS simultaneously using a shared LBT slot.
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