Dynamic SRS Sequence Hopping for Interference Mitigation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in effectively mitigating interference for sounding reference signals (SRS) in multi-user and multi-base station scenarios, particularly in 5G NR networks, where cross-SRS interference can degrade measurement quality due to limited sequence assignment and static SRS parameter configurations.
Innovation Solution
The proposed solution involves configuring SRS resources with dynamic sequence index values, group hopping, and sequence hopping, allowing for a larger number of base sequences to be assigned for interference planning and randomization, and dynamically updating SRS parameters such as comb spacing, cyclic shift, and hopping configurations based on current scheduling decisions and traffic conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If static SRS parameter configurations are used, then device complexity is reduced, but interference mitigation capability deteriorates
Solution Approach 1:
The patent implements dynamic SRS parameter configurations where sequence index values, comb spacing, and cyclic shift values are updated based on current scheduling decisions and traffic conditions. This allows the system to adapt to changing interference environments while maintaining manageable complexity through standardized update mechanisms.
Solution Approach 2:
The patent changes multiple SRS parameters including sequence index values, comb spacing values, and cyclic shift values to enhance interference randomization. By dynamically adjusting these parameters based on scheduling decisions and traffic conditions, the system improves interference mitigation capability without requiring complete reconfiguration of the SRS framework.
2Device complexity
If limited sequence assignment is used, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The patent utilizes multiple base sequences with different sequence index values to improve measurement quality. By selecting from a larger pool of available sequences and dynamically changing sequence indices based on scheduling decisions, the system achieves better interference randomization and measurement precision without excessive complexity.
Solution Approach 2:
The patent implements dynamic sequence selection where the network entity can assign different sequence index values from multiple available base sequences based on current traffic conditions and interference patterns. This dynamic approach improves measurement quality while maintaining manageable complexity through standardized selection criteria.
3Object-affected harmful factors
If dynamic SRS parameter updates are implemented, then interference mitigation is improved, but device complexity increases
Solution Approach 1:
The patent implements feedback mechanisms where the network entity monitors SRS measurements and scheduling decisions, then uses this information to dynamically update SRS parameters. The feedback loop allows the system to adapt to changing interference conditions while maintaining manageable complexity through standardized update procedures and thresholds.
Solution Approach 2:
The patent implements dynamic SRS parameter configurations where sequence index values, comb spacing, and cyclic shift values are updated based on current scheduling decisions and traffic conditions. This allows the system to adapt to changing interference environments while maintaining manageable complexity through standardized update mechanisms.
4Object-affected harmful factors
If more base sequences are assigned, then interference randomization is improved, but device complexity increases
Solution Approach 1:
The patent utilizes multiple base sequences with different sequence index values to improve interference randomization. By selecting from a larger pool of available sequences and dynamically changing sequence indices based on scheduling decisions, the system achieves better interference randomization without excessive complexity.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a configuration of a sounding reference signal (SRS) resource, wherein the configuration indicates a sequence index value for a base sequence for the SRS resource or the configuration indicates that the SRS resource is configured with group hopping and sequence hopping. The UE may transmit an SRS in the SRS resource in accordance with the configuration of the SRS resource. Numerous other aspects are described.