SRS Symbol Collision Resolution for MIMO and Positioning

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Solution Overview

Problem

In wireless communication systems, particularly in 5G networks, sounding reference signals (SRS) for multiple input multiple output (MIMO) and positioning can collide, leading to interference and inefficiencies in resource allocation.

Innovation Solution

A method for resolving SRS collisions by selecting one configuration over another based on priority, transmitting the selected configuration on collision symbols, and potentially canceling the non-selected configuration, with priority determination being predefined, rule-based, or dynamically indicated.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If SRS for MIMO and SRS for positioning are transmitted on overlapping symbols, then both functions can operate simultaneously, but signal collision and interference occur

Engineering Contradiction:

Improvesimultaneous operation of SRS-M and SRS-PVSAvoidsignal collision and interference

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent segments the SRS transmission resources by dividing them into different symbol sets - first set of symbols for SRS-M and second set of symbols for SRS-P. When collision is detected, the system selectively transmits only on non-overlapping symbols or prioritizes one signal type, effectively segmenting the transmission to avoid interference while maintaining both functions' operational capability

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements dynamic collision resolution where the UE detects symbol overlaps and adaptively selects which SRS configuration to transmit based on priority rules, predefined configurations, or dynamic indications from the network. This dynamic adjustment allows the system to maintain versatility while avoiding signal collision in real-time

Inventive Principle:

Principle #15Dynamics

2Object-affected harmful factors

If collision resolution prioritizes one SRS configuration, then signal interference is reduced, but the other SRS transmission may be canceled or delayed

Engineering Contradiction:

Improvesignal interferenceVSAvoidtransmission delay or cancellation

Core Design Contradiction:

Object-affected harmful factorsVSLoss of time

Solution Approach 1:

The patent applies preliminary action by establishing priority rules, predefined configurations, or network-indicated priorities before collision occurs. When collision is detected, the system immediately applies these pre-established rules to determine which SRS to transmit, avoiding transmission delays while reducing interference through predetermined decision-making frameworks

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12463778B2Sounding reference signal collision resolution

Publication Date: 2025.11.04 QUALCOMM INC

AI summary

In an aspect, a UE detects a collision between at least one symbol among first and second sets of symbols of respective SRS-M and SRS-P configurations. The UE selects one of the SRS-M configuration and the SRS-P configuration for transmission on the at least one detected collision symbol, and transmits an SRS transmission in accordance with the selected SRS configuration on the at least one detected collision symbol. In another aspect, a BS transmits configuration of a SRS-M-P, and receives an SRS-M-P transmission from a UE in accordance with the SRS-M-P configuration on at least one symbol.