PUSCH Transmission in Unlicensed Bands via Dynamic CAP Selection
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in signal transmission and reception, particularly in unlicensed bands, due to challenges in channel access procedures and uplink starting position determination, which affect communication reliability and latency.
Innovation Solution
A method and apparatus for user equipment (UE) in a wireless communication system that receives multiple combinations of channel access procedures and physical uplink shared channel starting positions through higher layer signals, and transmits based on selected combinations, optimizing channel access and uplink transmission in unlicensed bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple combinations of channel access procedures and PUSCH starting positions are configured, then communication reliability and efficiency are improved, but device complexity and signaling overhead increase
Solution Approach 1:
The patent segments the channel access procedure configuration by dividing it into multiple combinations of CAP types and PUSCH starting positions. Each combination represents a distinct scenario that can be independently configured and selected, allowing the system to handle different unlicensed band conditions optimally without overwhelming complexity
Solution Approach 2:
The patent implements dynamic selection of channel access procedure combinations based on actual transmission conditions. The UE and gNB can adaptively choose the most appropriate combination from the configured set, enabling the system to respond dynamically to changing channel conditions while maintaining manageable complexity through pre-configured options
2Productivity
If multiple combinations of channel access procedures and PUSCH starting positions are configured, then communication efficiency is improved, but signaling overhead increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple combinations of channel access procedures and PUSCH starting positions through higher layer signaling before actual transmission occurs. This allows the system to have multiple optimized options ready in advance, improving communication efficiency when transmitting in unlicensed bands without requiring extensive real-time signaling
Solution Approach 2:
The patent utilizes parameter changes by varying the channel access procedure parameters (CAP type and PUSCH starting position) across different combinations. This allows the system to adapt to different transmission scenarios by selecting appropriate parameter sets, improving efficiency while managing signaling overhead through structured parameter configuration
Data Source
AI summary
Disclosed in various embodiments are a method for transmitting and receiving signals in a wireless communication system, and an apparatus for supporting same, the method comprising the steps of: receiving, by means of an upper layer signal, information associated with a physical uplink shared channel (PUSCH) starting location, and a plurality of combinations of channel access procedure (CAP) types; receiving DCI comprising one combination from among the plurality of combinations; and transmitting PUSCH on the basis of the one combination, wherein the plurality of combinations is a part of the information associated with the PUSCH starting location and collection of candidate combinations of CAP types.