Variable Sensing Window Acquisition for 5G NR Sidelink
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Solution Overview
Problem
The fixed 100 ms stride of partial sensing in LTE sidelink resource pools is incompatible with the irregular sensing periodicities in 5G NR systems, leading to resource reservation collisions due to incomplete sensing of other terminals' reservation conditions.
Innovation Solution
A method for obtaining a sensing window that adapts to 5G NR systems by using variable strides based on the configured periodicity values in the resource pool, allowing for dynamic resource sensing windows and balancing power consumption and sensing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a detection window is configured in the random access channel, then random access performance is improved, but uplink data transmission capability is reduced due to resource occupation
Solution Approach 1:
The patent implements dynamic configuration of detection windows by allowing the network device to flexibly indicate detection window parameters (such as time offset and duration) through downlink control information. This enables the detection window to adapt to different traffic conditions and service types, optimizing random access performance while minimizing impact on uplink data transmission by adjusting window parameters in real-time based on system state
Solution Approach 2:
The patent segments the random access channel resources by introducing detection windows that are separated from regular uplink data transmission resources. This segmentation allows the system to dedicate specific time-frequency resources for random access detection without permanently occupying uplink data channels, thereby resolving the conflict between random access functionality and uplink data transmission capacity
2Adaptability or versatility
If detection window parameters are not clearly defined, then configuration flexibility is maintained, but terminal device implementation becomes uncertain and unreliable
Solution Approach 1:
The patent establishes a feedback mechanism where the network device sends downlink control information containing detection window parameter indications to terminal devices. This feedback loop ensures that terminal devices receive explicit, unambiguous parameter values (such as time offset, duration, and resource allocation) from the network, eliminating implementation uncertainty while preserving configuration flexibility through network-controlled parameter adjustment
Solution Approach 2:
The patent defines specific detectable parameters for the detection window including time offset relative to reference signals, window duration, and frequency resource allocation. By standardizing these parameters and providing clear indication methods through downlink control information, the patent ensures reliable terminal implementation while maintaining flexibility through programmable parameter values that can be adjusted based on system requirements
Data Source
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AI summary
This application discloses a method and an apparatus for obtaining a sensing window, and a terminal. The method includes at least one of the following: obtaining a first resource sensing window according to at least one stride P; or obtaining a second resource sensing window according to a resource selection window.