PUCCH Resource Allocation for LBT in Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in transmitting and receiving control information, particularly in managing physical uplink control channels (PUCCH) resources within the context of listen-before-talk (LBT) procedures, which can impact overall communication efficiency.
Innovation Solution
A method and apparatus for efficiently transmitting control information in wireless communication systems by receiving scheduling information including LBT type and PUCCH resource indication, selecting a PUCCH resource set based on LBT type information, and transmitting ACK/NACK information after performing an LBT procedure, allowing for flexible resource allocation and efficient channel access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple PUCCH resource sets are configured for different LBT types, then adaptability to different channel access conditions is improved, but device complexity increases due to additional resource management
Solution Approach 1:
The PUCCH resources are segmented into multiple resource sets, where each set is specifically configured for a particular LBT type. This segmentation allows the system to handle different channel access conditions independently, improving adaptability while keeping each individual resource set manageable in complexity.
Solution Approach 2:
The system dynamically selects which PUCCH resource set to use based on the actual LBT type determined during channel access procedures. This dynamic adaptation allows the system to optimize performance for current channel conditions without permanently maintaining complex configurations for all possible LBT types simultaneously.
2Speed
If PUCCH resources are allocated before LBT procedure, then resource allocation speed is improved, but channel access reliability deteriorates due to potential resource conflicts
Solution Approach 1:
PUCCH resources are preliminarily allocated and configured in advance for different LBT types, enabling fast resource assignment when needed. This preliminary preparation maintains allocation speed while the subsequent selection process ensures reliability by matching resources to actual channel conditions.
Solution Approach 2:
The LBT type determination acts as an intermediary selection mechanism that bridges the preliminary resource allocation and the actual channel access. It mediates between pre-configured resources and real-time channel conditions, ensuring that the right resources are selected based on current LBT outcomes.
3Reliability
If LBT procedure is performed before ACK/NACK transmission, then channel access compliance is improved, but transmission delay increases
Solution Approach 1:
Multiple PUCCH resource sets are preliminarily configured for different LBT types, so that when the LBT procedure completes, the appropriate resource is already identified and ready for immediate use. This preliminary configuration minimizes the time added by the LBT procedure.
Solution Approach 2:
The system dynamically adapts the transmission timing and resource selection based on the LBT outcome. By having multiple pre-configured resource sets, the system can quickly switch to the appropriate resource without fixed delays, optimizing transmission timing according to actual channel access results.
Data Source
AI summary
The present invention relates to a wireless communication system, and specifically, to a method and a device for the method, the method comprising the steps of: receiving scheduling information including LBT type information and PUCCH resource indication information; receiving data on the basis of the scheduling information; and carrying out an LBT procedure on the basis of the LBT type information, and then transmitting ACK/NACK information of the data by using a PUCCH resource, wherein one PUCCH resource set, among a plurality of PUCCH resource sets, is selected on the basis of the value of the LBT type information, and the PUCCH resource is indicated, in the selected PUCCH resource set, by the PUCCH resource indication information.