SRS Scheduling in Mixed Sub-Band Full-Duplex Slots
Solution Overview
Problem
Existing wireless communication systems face challenges in scheduling sounding reference signals (SRS) in time-division duplexing (TDD) structures with mixed sub-band full-duplex (SBFD) and non-SBFD symbols, leading to potential disruptions in SRS transmission and channel estimation accuracy.
Innovation Solution
The proposed method involves a user equipment (UE) receiving a schedule for a sounding reference signal resource set, which indicates a slot offset for a target slot relative to a reference slot. The UE then transmits a quantity of sounding reference signals based on the target slot containing both SBFD and non-SBFD symbols, and the overlapping SRS resources between these symbols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If SRS transmission is scheduled in mixed SBFD slots, then resource utilization efficiency is improved, but transmission reliability deteriorates due to potential overlaps between SBFD and non-SBFD symbols
Solution Approach 1:
The patent segments the frequency band into different sub-bands, assigning specific sub-bands to SBFD symbols and others to non-SBFD symbols. This segmentation allows SRS resources to be allocated without overlap between the two symbol types, resolving the reliability issue while maintaining efficient resource utilization across the entire frequency spectrum.
Solution Approach 2:
The patent applies different transmission characteristics to different parts of the frequency spectrum. By assigning specific quality attributes (SBFD or non-SBFD) to specific frequency sub-bands, the system ensures that SRS resources in each sub-band are transmitted with appropriate characteristics, preventing overlaps and ensuring reliable transmission while optimizing overall resource usage.
2Adaptability or versatility
If slot offset for target slot is increased, then scheduling flexibility is improved, but transmission delay increases
Solution Approach 1:
The patent implements dynamic SRS scheduling where the network can flexibly adjust the slot offset based on current channel conditions and traffic requirements. The system can dynamically select optimal target slots that balance scheduling flexibility with minimal delay, adapting to varying network conditions without being constrained by fixed offset values.
Solution Approach 2:
The patent allows dynamic modification of scheduling parameters including slot offset values. By changing these parameters based on network conditions, the system achieves both scheduling flexibility and reduced delay - when low delay is critical, smaller offsets are used; when flexibility is prioritized, larger offsets can be applied.
Data Source
AI summary
Some examples of the techniques described herein may provide approaches for scheduling a sounding reference signal (SRS) in a time-division duplex (TDD) structure with one or more mixed sub-band full-duplex (SBFD) slots. For SRS based on physical slot counting, for example, some of the techniques described herein may provide approaches indicating whether to transmit or drop SRS resources in SBFD or non-SBFD symbols in a mixed SBFD slot. For SRS based on available slot counting, for example, some of the techniques described herein may indicate whether a mixed SBFD slot is an available slot for SRS transmission. For duplex-specific SRS, for example, some of the techniques described herein may indicate whether to label or determine a mixed SBFD slot as an SBFD-specific slot or non-SBFD-specific slot, or whether a resource in a mixed SBFD slot may be sent or dropped.