Sidelink LBT Failure Detection by Resource Pool and RB Set
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Solution Overview
Problem
In sidelink communication systems operating in unlicensed bands, terminals face continuous LBT failures due to resource contention from other radio access technologies, leading to reduced reliability of sidelink transmissions, and existing methods do not effectively detect consistent LBT failures at the appropriate granularity.
Innovation Solution
A sidelink listen-before-talk processing method where terminals receive configuration information including a timer value and a count value associated with resource units, allowing them to determine consistent LBT failures at the granularity of resource pools or resource block sets, and implement operations to improve transmission reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminals continuously perform LBT operations in unlicensed bands, then transmission opportunities may be obtained, but LBT failures occur due to resource contention from other radio access technologies, reducing transmission reliability
Solution Approach 1:
The patent segments the resource unit into different granularities (resource pool level and resource block set level) for independent LBT failure detection. This allows the system to detect and respond to LBT failures at appropriate scopes, preventing continuous ineffective LBT attempts across entire resource pools when only specific resource block sets are affected, thereby improving reliability while maintaining productive LBT operations in unaffected resources.
Solution Approach 2:
The patent implements feedback mechanisms where the terminal detects LBT failures, notifies the network-side device, and receives configuration updates (timer values and count values). This closed-loop feedback enables dynamic adjustment of LBT parameters based on actual channel conditions, preventing continuous failures and improving both reliability and productivity.
2Reliability
If terminals detect LBT failures at coarse granularity (resource pool level), then consistent LBT failures can be identified, but resource utilization efficiency decreases as entire resource pools may be blocked unnecessarily
Solution Approach 1:
The patent introduces dual-granularity detection by segmenting the detection scope into resource pool level and resource block set level. This segmentation enables precise identification of failed resources without unnecessarily blocking entire resource pools, thus maintaining both reliable failure detection and high resource utilization efficiency.
Solution Approach 2:
The patent applies local quality by allowing different detection and response strategies for different resource units within the same resource pool. Successful resource block sets continue to be utilized while failed ones are excluded, optimizing overall resource utilization efficiency while maintaining reliable failure detection.
3Productivity
If terminals implement fine-grained LBT failure detection at resource block set level, then resource utilization efficiency improves, but detection and measurement complexity increases
Solution Approach 1:
The patent manages detection complexity through segmentation by organizing resource block sets within resource pools and applying detection mechanisms at appropriate levels. This structured segmentation simplifies the detection process compared to examining each individual resource block, while still achieving fine-grained resource utilization efficiency.
Solution Approach 2:
The patent merges detection efforts by combining resource block set level detection with resource pool level oversight. This merging approach reduces overall detection complexity by handling resources in grouped units rather than individually, while maintaining the productivity benefits of fine-grained detection.
4Ease of operation
If terminals continue LBT operations after failures without parameter adjustment, then simple operation is maintained, but transmission reliability remains low due to persistent failures
Solution Approach 1:
The patent introduces dynamic parameter adjustment by configuring timer values and count values that automatically adapt LBT operations based on failure detection. This dynamic mechanism maintains ease of operation from the terminal's perspective while significantly improving transmission reliability through automated parameter optimization.
Solution Approach 2:
The terminal implements self-service by autonomously detecting LBT failures, notifying the network-side device, and receiving parameter adjustments without manual intervention. This self-service approach maintains operational simplicity while improving reliability through adaptive parameter configuration.
Data Source
AI summary
This application discloses a sidelink listen-before-talk processing method and apparatus, a terminal, and a network-side device, and pertains to the field of communication technologies. The sidelink listen-before-talk processing method according to an embodiment of this application includes: receiving, by a terminal, configuration information from a network-side device, where the configuration information includes a first timer value and a first count value, both the first timer value and the first count value are associated with a resource unit, and the resource unit includes a resource pool or a resource block set; determining, by the terminal based on the first timer value and the first count value during a listen-before-talk process in a sidelink SL unlicensed band, whether consistent LBT failure occurs on the resource unit.