Configured-Grant PUSCH Control with Segmented PDCCH Decoding for Lower Energy
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting and receiving physical uplink shared channels (PUSCH) due to limited resource allocation and high energy consumption during decoding processes.
Innovation Solution
A method for transmitting PUSCH by a user equipment in a wireless communication system, involving the reception of a first physical downlink control channel (PDCCH) with specific identifiers for releasing or activating configurations for periodic PUSCH transmission, based on a configured grant.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a user equipment performs decoding for all possible CCE combinations in the search space to recognize PDCCH, then the user equipment can reliably receive control information, but the decoding time increases and energy consumption becomes large
Solution Approach 1:
The patent segments the search space into multiple parts and divides the decoding process into stages. Instead of decoding all CCE combinations simultaneously, the user equipment first decodes a subset of CCE combinations, then based on the decoding results and feedback, selectively continues decoding only the necessary remaining combinations. This segmentation reduces the total number of decodings required while maintaining reliable control information reception.
Solution Approach 2:
The patent performs preliminary decoding actions on a subset of CCE combinations before committing to full decoding of all combinations. By initially decoding only part of the search space and using the results to guide subsequent decoding decisions, the system avoids unnecessary decoding operations, thereby reducing energy consumption while ensuring that critical control information is still reliably received.
2Productivity
If resources are shared among multiple user equipments for PDCCH transmission, then resource utilization improves, but the decoding complexity and time for each user equipment increases
Solution Approach 1:
The patent segments the shared search space into multiple subsets and assigns different decoding priorities or time windows to different user equipments. Each user equipment focuses on decoding specific segments of the search space at different times or with different computational resources, which reduces the simultaneous decoding burden on each device while maintaining efficient overall resource utilization.
Solution Approach 2:
The patent implements periodic decoding opportunities where user equipments take turns or follow a scheduled pattern for decoding PDCCH candidates. Instead of all user equipments attempting to decode all CCE combinations simultaneously, they follow a periodic schedule that distributes the decoding workload over time, reducing individual decoding time while maintaining high resource utilization through coordinated access.
3Adaptability or versatility
If the number of combined CCEs is increased to provide more search space options, then the flexibility of resource allocation improves, but the device complexity and decoding burden increases
Solution Approach 1:
The patent makes the CCE combination level dynamic rather than fixed. The system can adaptively adjust the number of combined CCEs based on current channel conditions, traffic requirements, and user equipment capabilities. This dynamic adjustment allows the system to provide high flexibility when needed while reducing complexity during normal operations, effectively balancing adaptability and device complexity.
Solution Approach 2:
The patent changes the parameter of CCE combination level based on system state and requirements. By dynamically modifying this parameter, the system can scale the search space complexity to match actual needs, providing high adaptability when complex resource allocation is required while maintaining low device complexity during standard operations through parameter adjustment.
Data Source
AI summary
There is disclosed a method for transmitting a physical uplink shared channel (PUSCH) to a base station by a user equipment in a wireless communication system. The user equipment may receive a first physical downlink control channel (PDCCH) including first downlink control information (DCI) from the base station, and release the activated configuration for repetitive transmission of the PUSCH based on the received DCI.