Multi-Cell PUSCH Scheduling Using Dual SRS Resource Sets
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Solution Overview
Problem
Existing mobile communication systems face challenges in efficiently scheduling multi-cell physical uplink shared channels with sounding reference signal resource sets, particularly in multi-transmission-reception point scenarios, leading to increased control overhead and reduced spectral/power efficiency.
Innovation Solution
Implementing multi-cell DCI format 0_X for scheduling PUSCH transmissions, which allows for flexible use of two different uplink sounding reference signal resource sets, either codebook or non-codebook based, to optimize scheduling and reduce control overhead while maintaining spectral efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple SRS resource sets are configured for multi-cell PUSCH scheduling, then the flexibility and reliability of uplink transmissions in M-TRP scenarios are improved, but the control overhead increases
Solution Approach 1:
The patent segments the SRS resource configuration into multiple distinct resource sets (first SRS resource set and second SRS resource set), each associated with different TCI states. This segmentation allows the system to selectively activate appropriate resource sets based on channel conditions and transmission requirements, thereby improving reliability without requiring all resources to be continuously monitored, thus managing control overhead effectively.
Solution Approach 2:
The patent implements dynamic switching between different SRS resource sets based on transmission conditions. The network can dynamically indicate which SRS resource set to use for PUSCH transmissions, allowing the system to adapt to changing channel conditions and M-TRP requirements. This dynamic approach improves transmission reliability while avoiding the need for static configuration of all possible resources, thereby controlling overhead.
2Adaptability or versatility
If multiple SRS resource sets are configured for multi-cell PUSCH scheduling, then the flexibility in scheduling data across multiple cells is improved, but the device complexity increases
Solution Approach 1:
The patent employs preliminary configuration of multiple SRS resource sets with distinct TCI state associations before actual PUSCH transmissions. The network pre-configures these resource sets and their relationships with TCI states, so that during actual transmissions, the UE can simply follow network indications without performing complex real-time decisions. This preliminary setup enables scheduling flexibility while reducing the computational complexity during operation.
Solution Approach 2:
The patent introduces the TCI state as an intermediary that mediates between the multiple SRS resource sets and the PUSCH transmissions. The TCI state serves as a reference that links spatial configuration information to specific SRS resource sets, simplifying the management complexity. The network can indicate TCI states to implicitly select appropriate SRS resource sets, reducing the burden on the UE to directly manage multiple complex resource configurations.
3Adaptability or versatility
If SRS resource sets with codebook and non-codebook based transmissions are supported, then the adaptability to different transmission modes is improved, but the difficulty of detecting and measuring increases
Solution Approach 1:
The patent applies local quality by associating different properties (codebook or non-codebook based transmission characteristics) with different SRS resource sets. Each resource set is locally optimized for specific transmission modes, allowing the system to adapt to different transmission requirements without requiring a single complex configuration that must handle all modes. This localized approach simplifies detection and measurement by providing clear distinctions between resource set purposes.
Data Source
AI summary
Multi-cell physical uplink shared channel scheduling with sounding reference signal resource sets is provided. The method may include receiving, from a network entity, a first configuration for multi-cell physical uplink shared channel scheduling for a set of cells and receiving a second configuration that includes at least two uplink sounding reference signal resource sets for at least one serving cell of the set of cells. At least two uplink sounding reference signal resource sets may include information relating to usage of codebook and/or non-codebook based physical uplink shared channel transmission. The method also includes receiving a scheduling message indicating to transmit one or more respective physical uplink shared channels on one or more cells, and determining one SRS resource set for the PUSCH transmission including one or more repetitions for the at least one serving cell of the set of cells.