Uplink Transmission Start Location Offset for LBT Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The size of a time domain symbol in an unlicensed band does not match the granularity of Listen Before Talk (LBT) categories, leading to inconsistencies in gap timing between transmissions, which affects the scheduling and normal operation of uplink transmissions.
Innovation Solution
The method involves receiving indication information to determine the actual start location of transmission, which can be either at the start or within a reference time domain symbol, allowing for flexible alignment of transmission schedules to match the LBT categories, ensuring proper granularity and normal uplink transmission in unlicensed bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If transmission starts at the beginning of a time domain symbol to simplify scheduling, then scheduling complexity is reduced, but transmission cannot achieve proper alignment with LBT granularity requirements
Solution Approach 1:
The patent makes the transmission start location dynamic by introducing an offset value that can adjust the start position within a time domain symbol. This offset is determined based on LBT category requirements, allowing the system to adapt between fixed scheduling simplicity and dynamic LBT alignment as needed.
Solution Approach 2:
The patent changes the parameter of transmission start location from a fixed value (beginning of time domain symbol) to a variable value (offset within the symbol). By introducing the offset parameter and providing indication information to terminals, the system can adjust this parameter based on LBT category requirements while maintaining standardized scheduling procedures.
2Ease of operation
If transmission start location is fixed at the beginning of time domain symbol, then scheduling is simplified, but gap timing between transmissions becomes inconsistent with LBT category requirements
Solution Approach 1:
The patent introduces dynamic adjustment of transmission start location within the scheduling framework. The offset value allows the system to maintain the overall simplified scheduling structure while dynamically adjusting specific start positions to achieve precise gap timing alignment with LBT category requirements.
Solution Approach 2:
By changing the transmission start location parameter from fixed to variable (using offset), the system can simultaneously maintain scheduling simplicity and achieve precise gap timing. The indication information mechanism allows this parameter change to be communicated efficiently to terminals without complicating the overall scheduling process.
3Reliability
If transmission start location is flexible within time domain symbol to match LBT granularity, then LBT alignment is improved, but scheduling complexity increases
Solution Approach 1:
The patent implements minimal necessary dynamics by introducing a single offset parameter that can be indicated through existing signaling mechanisms. This dynamic adjustment is localized to the transmission start position without requiring complex dynamic scheduling algorithms, thus achieving LBT alignment with limited increase in scheduling complexity.
Solution Approach 2:
The patent uses parameter changes (offset within time domain symbol) to achieve LBT alignment while controlling complexity through efficient indication methods. The offset parameter is communicated via indication information that leverages existing signaling frameworks, avoiding the need for entirely new complex scheduling protocols.
4Ease of operation
If fixed transmission start location is used, then scheduling is straightforward, but uplink transmission normality is affected due to granularity mismatch
Solution Approach 1:
The patent introduces dynamic offset adjustment to ensure uplink transmission normality while maintaining straightforward scheduling. The offset is determined based on LBT category and gap timing requirements, allowing the system to adapt the start position to ensure proper uplink transmission sequence and timing without complicating the overall scheduling approach.
Solution Approach 2:
By changing the transmission start location parameter using an offset value, the patent ensures that uplink transmissions maintain proper timing relationships and normal operation. The indication information mechanism efficiently communicates this parameter change to terminals, ensuring correct implementation while preserving scheduling simplicity.
Data Source
AI summary
The embodiments of the present disclosure provide an information transmission method in an unlicensed band, a terminal, and a network device. The method includes receiving indication information; and performing transmission from an actual start location according to the indication information. The actual start location is a start location of a reference time domain symbol, or the actual start location is within the reference time domain symbol.