SRS Comb Offset Hopping Across Transmission Occasions
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Solution Overview
Problem
Existing wireless communication systems face challenges in managing increased SRS transmissions due to multiple UEs communicating with different cells/TRPs, leading to interference and inefficient resource utilization.
Innovation Solution
Implementing comb offset hopping for SRS transmissions, where UEs are configured with a hopping pattern that applies different comb offsets for each transmission occasion, enabling efficient SRS transmissions across multiple occasions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple UEs perform SRS transmissions to different cells/TRPs simultaneously, then the quantity of SRS transmissions increases to support more users, but interference between transmissions increases and resource utilization becomes inefficient
Solution Approach 1:
The patent applies dynamics by making the comb offset configurable and changeable across different SRS transmission occasions. Instead of a fixed comb offset, the system dynamically adjusts the comb offset based on UE-specific configurations and transmission occasion indices, allowing the frequency domain resources to shift adaptively and reduce persistent interference patterns between simultaneous SRS transmissions from multiple UEs.
Solution Approach 2:
The patent changes the comb offset parameter across different SRS transmission occasions according to a configured hopping pattern. The comb offset value is modified based on the occasion index and UE identity, transforming the static resource allocation into a dynamic one where parameters change over time, thereby distributing interference more evenly across frequency resources and improving overall resource utilization.
2Ease of operation
If fixed comb offset is used for SRS transmissions, then resource allocation is simple and deterministic, but interference patterns become persistent and resource utilization is inefficient
Solution Approach 1:
The patent implements periodic action through comb offset hopping patterns that repeat across SRS transmission occasions. The comb offset changes periodically according to configured patterns (e.g., alternating between two offsets or following a pseudo-random sequence), which maintains operational simplicity while ensuring that interference patterns do not persist indefinitely on the same frequency resources, thereby improving resource utilization efficiency.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. A user equipment (UE) may receive signaling identifying a sounding reference signal (SRS) configuration for the UE, the SRS configuration indicating at least a SRS comb offset hopping configuration. The UE may select, based at least in part on the comb offset hopping configuration, a hopping pattern for SRS transmissions across multiple SRS transmission occasions, the hopping pattern comprising a different comb offset applied for each SRS transmission occasion. The UE may transmit the SRSs across multiple SRS transmission occasions according to the SRS configuration and the hopping pattern.