Block Feedback with Variable Timing for Semi-Persistent Scheduling
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in semi-persistent scheduling (SPS) and acknowledgment/negative-acknowledgment (ACK/NACK) feedback mechanisms, particularly in terms of resource overhead and power consumption, especially for reduced capability User Equipments (UEs) that require efficient feedback mechanisms to manage multiple SPS occasions.
Innovation Solution
Implementing block feedback techniques with variable feedback timing, where a User Equipment (UE) receives a block feedback configuration from a base station for multiple SPS occasions, allowing for the transmission of ACK/NACK feedback using a single uplink resource with defined minimum and maximum feedback timing values, reducing the need for per-SPS occasion feedback and minimizing resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If per-SPS occasion feedback is used, then feedback reliability is improved, but resource overhead and power consumption increase
Solution Approach 1:
The patent combines multiple SPS occasion feedback into a single block feedback transmission. The UE receives a block feedback configuration that includes multiple SPS occasion indices, and transmits ACK/NACK feedback for all these occasions in one uplink resource, thereby reducing power consumption while maintaining feedback reliability through consolidated transmission.
Solution Approach 2:
The block feedback configuration enables a single uplink resource to serve multiple SPS occasions simultaneously. The feedback resource is configured to carry feedback for multiple SPS occasions with different timing values, making it a universal resource that handles diverse feedback requirements efficiently.
2Measurement precision
If per-SPS occasion feedback is transmitted, then feedback accuracy is improved, but resource overhead increases
Solution Approach 1:
The patent merges feedback for multiple SPS occasions into a single block feedback message. The UE identifies multiple SPS occasions based on the block feedback configuration and transmits consolidated ACK/NACK feedback for all occasions in one uplink resource, reducing resource overhead while preserving feedback accuracy through structured block feedback format.
3Reliability
If multiple uplink resources are allocated for feedback, then feedback reliability is improved, but device complexity increases
Solution Approach 1:
The patent configures a single uplink resource to handle feedback for multiple SPS occasions. The block feedback configuration includes multiple SPS occasion indices that map to one feedback resource, reducing device complexity by eliminating the need to manage multiple separate uplink resources while maintaining feedback reliability through consolidated transmission.
4Productivity
If block feedback with variable timing is used, then resource efficiency is improved, but feedback timing flexibility is constrained
Solution Approach 1:
The patent implements dynamic feedback timing within block feedback by configuring multiple SPS occasions with different feedback timing values (K1) in the block feedback configuration. The UE determines feedback timing for each SPS occasion based on the configured timing values, enabling flexible adaptation to different latency requirements while maintaining resource efficiency through block feedback consolidation.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described for block feedback of multiple semi-persistent scheduling (SPS) occasions. Block feedback may be provided based on variable feedback timing values that are associated with one or more SPS occasions. A user equipment (UE) may determine feedback for each of two or more SPS occasions, and transmit a block feedback that indicates the feedback. A separate feedback timing between a SPS occasion and uplink feedback resources may be provided for multiple SPS occasions, which are associated with a single uplink feedback resource. Alternatively, a minimum feedback timing value and a maximum feedback timing value may be configured for a particular uplink resource, and block feedback for multiple SPS occasions within the minimum and maximum feedback timing values may be reported in the uplink feedback resource.