Multi-Band LBT DCI Sharing to Reduce Transmission Complexity
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently transmitting downlink control information (DCI) across multiple listen-before-talk (LBT) bandwidths due to restrictions in DCI format 2_0, which limits the number of DCI transmissions and increases complexity and resource usage.
Innovation Solution
The system allows for the transmission of DCI indicating acquisition of a channel occupancy time (COT) or starting point of a fixed frame period (FFP) across multiple LBT bandwidths, enabling aligned or misaligned FFPs, thereby reducing complexity and conserving resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If DCI is transmitted in each LBT bandwidth separately, then channel occupancy information is accurately conveyed, but the number of DCI transmissions increases and resource usage increases
Solution Approach 1:
The patent combines multiple DCI transmissions across different LBT bandwidths into a single unified DCI transmission. The base station transmits one DCI message that contains channel occupancy time (COT) information applicable to multiple LBT bandwidths simultaneously, thereby reducing the total number of DCI transmissions while maintaining accurate conveyance of occupancy information across all bandwidths.
Solution Approach 2:
The DCI transmission is designed to serve multiple LBT bandwidths universally. A single DCI message structure is created that can convey COT information for multiple bandwidths at once, making the DCI transmission multi-functional rather than dedicated to a single bandwidth. This universal approach reduces redundancy and conserves resources.
2Reliability
If multiple DCI transmissions are used across multiple LBT bandwidths, then channel occupancy information is conveyed, but system complexity increases
Solution Approach 1:
The patent merges the functionality of multiple separate DCI transmissions into a single unified DCI message. This consolidation reduces system complexity by eliminating the need for multiple independent DCI transmission chains, while still ensuring that channel occupancy information is accurately conveyed across all LBT bandwidths through the unified message structure.
3Stability of the object's composition
If DCI format 2_0 restrictions are enforced, then standard compliance is maintained, but resource usage and transmission limits are imposed
Solution Approach 1:
The patent introduces dynamic flexibility to the DCI transmission system by allowing a single DCI message to adaptively convey information for multiple LBT bandwidths. While maintaining compliance with DCI format standards, the system dynamically adjusts the scope of COT information coverage across different bandwidths within a single transmission, thereby reducing resource usage without sacrificing format stability or compliance.
Data Source
AI summary
Wireless communications systems and methods related to wireless communications in a system are provided. A first wireless communication device may communicate with a second wireless communication device in a listen-before-talk (LBT) bandwidth of a set of LBT bandwidths, downlink control information (DCI). The DCI may indicate acquisition of a channel occupancy time (COT) in a fixed frame period (FFP) across the set of LBT bandwidths and/or a starting point of the FFP in the respective LBT bandwidth. The first wireless communication device may communicate with the second wireless communication device, a communication in at least one LBT bandwidth of the set of LBT bandwidths during the respective COT.