Uplink UCI Grant Multiplexing for Periodic and Aperiodic Control
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing and allocating resources for both periodic and aperiodic uplink control information (UCI) in next-generation networks, leading to resource wastage and suboptimal coding gains.
Innovation Solution
A scheduling and transmission scheme that enables UEs to select and combine periodic and aperiodic UCI resource grants based on grant selection rules, allowing for multiplexing and optimizing resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate resource grants are allocated for periodic and aperiodic UCI transmissions, then resource allocation flexibility is improved, but resource utilization efficiency deteriorates due to potential overlap and wastage
Solution Approach 1:
The patent combines periodic and aperiodic UCI transmissions by allowing aperiodic UCI to be multiplexed with periodic UCI in the same PUCCH resource. This merging approach resolves the contradiction by enabling flexible resource allocation (different grant types can coexist) while improving resource utilization (no wasted resources from separate allocations). The base station can dynamically decide whether to multiplex or transmit separately based on traffic conditions.
2Reliability
If multiple UCI resource grants are allocated within a time period, then transmission reliability is improved through redundancy, but resource wastage increases
Solution Approach 1:
The patent implements partial action by allowing aperiodic UCI to share PUCCH resources with periodic UCI only when needed, rather than always allocating separate resources. The base station evaluates the actual need for aperiodic UCI transmission and only multiplexes when necessary, thus maintaining reliability when required while avoiding resource wastage when aperiodic traffic is absent.
Solution Approach 2:
The patent enables dynamic recovery of PUCCH resources. When aperiodic UCI is not present, the resources that would have been allocated for aperiodic transmissions are recovered and can be used for other purposes or left available, thus eliminating resource wastage while maintaining the capability for reliable transmission when needed.
3Measurement precision
If periodic and aperiodic UCI are transmitted separately, then transmission clarity is improved, but coding gain is reduced due to smaller block sizes
Solution Approach 1:
The patent merges periodic and aperiodic UCI into the same PUCCH transmission when possible, combining their payloads into a single code block. This merging increases the overall block size, thereby improving coding gain and reliability, while the base station maintains transmission clarity through proper multiplexing and signaling of the combined UCI content.
Data Source
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AI summary
Aspects of the present disclosure provide a scheduling and transmission scheme to manage multiple uplink control information (UCI) resource grants for periodic and aperiodic UCI for a particular user equipment (UE). Grant selection rules may be defined to enable the UE to select one or more of the UCI resource grants allocated within a particular period of time. In addition, the grant selection rules may further enable the UE to combine both periodic and aperiodic UCI within a particular UCI resource grant. The grant selection rules may further enable the UE to multiplex UCI over multiple UCI resource grants. Other aspects, embodiments, and features are also claimed and described.