PUSCH Repetition Multiplexing for Aperiodic CSI Coverage
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Solution Overview
Problem
Existing wireless communication technologies fail to support efficient multiplexing of aperiodic channel state information (A-CSI) on multiple physical uplink shared channel (PUSCH) repetitions, particularly when all repetitions are associated with a single SRS resource set or when more than two repetitions are associated with multiple SRS resource sets, limiting the number of repetitions on which A-CSI can be multiplexed.
Innovation Solution
The method involves signaling to a user equipment (UE) to multiplex A-CSI with at least two PUSCH repetitions based on specific conditions, such as ensuring the repetitions have the same length and no other uplink control information (UCI) is multiplexed, and indicating the maximum number of eligible repetitions for A-CSI multiplexing, which can be configured via RRC or DCI, to enhance multiplexing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing wireless communication technologies are used for A-CSI multiplexing on PUSCH repetitions, then the system maintains compatibility with current standards, but the number of repetitions on which A-CSI can be multiplexed is limited
Solution Approach 1:
The patent introduces dynamic conditions for A-CSI multiplexing on PUSCH repetitions, where the network can configure different behaviors based on SRS resource set associations. The system dynamically determines whether A-CSI can be multiplexed on multiple repetitions based on whether repetitions are associated with the same or different SRS resource sets, allowing flexible adaptation without fixed complex structures.
Solution Approach 2:
The patent changes the parameter of SRS resource set association to control A-CSI multiplexing behavior. By modifying how repetitions are associated with SRS resource sets (single set vs. multiple sets), the system enables or disables multi-repetition A-CSI multiplexing, providing adaptability through parameter configuration rather than structural complexity.
2Reliability
If A-CSI is multiplexed on multiple PUSCH repetitions, then coverage and reliability are enhanced, but the requirements for repetition configuration and signaling increase
Solution Approach 1:
The patent applies preliminary action by having the network pre-configure A-CSI multi-repetition multiplexing conditions and SRS resource set associations before actual data transmission. The UE receives and stores these configurations in advance, so when PUSCH repetitions occur, the UE can automatically determine whether to multiplex A-CSI based on pre-established rules, reducing real-time decision complexity.
Solution Approach 2:
The patent introduces SRS resource set association as an intermediary mechanism that mediates between the network's reliability requirements and the UE's configuration complexity. The SRS resource set association acts as a simple, observable parameter that both network and UE can use to determine A-CSI multiplexing behavior without requiring complex direct negotiation or configuration.
3Adaptability or versatility
If the system supports A-CSI multiplexing on PUSCH repetitions associated with multiple SRS resource sets, then adaptability is improved, but the difficulty of detecting and measuring eligible repetitions increases
Solution Approach 1:
The patent segments the PUSCH repetitions into groups based on their association with different SRS resource sets. Each repetition is tagged with its associated SRS resource set identifier, allowing the UE to easily identify and segment eligible repetitions for A-CSI multiplexing by simply comparing these identifiers, reducing the difficulty of detection and measurement.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for multiplexing aperiodic channel state information (AP-CSI or A-CSI) or semi-periodic CSI (SP-CSI) on multiple physical uplink share channel (PUSCH) repetitions. For example, according to certain aspects, a method for wireless communications at a user equipment (UE) includes obtaining signaling indicating that the UE is to multiplex aperiodic channel state information (A-CSI) with the at least two PUSCH repetitions when one or more conditions are met, obtaining signaling scheduling the UE to transmit the at least two PUSCH repetitions, wherein the at least two PUSCH repetitions are associated with a first sounding reference signal (SRS) resource set, and outputting the at least two PUSCH repetitions for multiplexing with the A-CSI based on the signaling indication and the one or more conditions.