Partial Sensing for LTE V2X Resource Selection
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Solution Overview
Problem
Current LTE vehicular communication systems face challenges in efficiently managing power consumption during partial sensing for pedestrian-to-vehicle (P2V) communication, which can lead to degraded system performance and resource collisions, especially in scenarios requiring frequent resource selection and reselection.
Innovation Solution
Implementing a partial sensing approach that reduces power consumption by limiting the sensing duration while maintaining resource selection efficiency, involving the use of preconfigured partial sensing windows and resource exclusion procedures to minimize impact on vehicular-to-vehicular (V2V) communication performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If full sensing duration is used for resource selection in P2V communication, then resource selection reliability is improved, but power consumption increases
Solution Approach 1:
The patent applies partial sensing by monitoring only a subset of subframes within the sensing window rather than all subframes. Specifically, the UE monitors K1 out of K2 total subframes, where K1 < K2, achieving partial observation of the channel conditions. This reduces power consumption while maintaining adequate resource selection reliability for P2V communication.
Solution Approach 2:
The sensing window is divided into multiple subframes, and the UE selectively monitors only certain segments (K1 specific subframes) rather than the entire sensing window (K2 subframes). This segmentation approach allows the system to reduce monitoring overhead and power consumption while still gathering sufficient information for resource selection.
2Use of energy by moving object
If partial sensing with reduced duration is implemented, then power consumption is reduced, but resource collision risk increases
Solution Approach 1:
The UE performs preliminary sensing during the reduced monitoring window (K1 subframes) to identify occupied resources before making resource selection decisions. This preliminary action allows the UE to exclude resources that are already occupied by other V2X transmissions, thereby reducing resource collision risk even with shortened sensing duration.
Solution Approach 2:
The system uses feedback from the monitored subframes to adjust resource selection. By analyzing the outcomes of partial sensing and incorporating this feedback into the resource exclusion procedure, the UE can make more informed decisions about which resources to select, reducing the likelihood of collisions despite monitoring fewer subframes.
3Adaptability or versatility
If frequent resource selection and reselection is performed, then communication adaptability is improved, but system performance degrades due to power consumption
Solution Approach 1:
The patent implements periodic resource selection and reselection based on configured intervals rather than continuous monitoring. The UE performs sensing and resource selection at periodic intervals defined by the sensing window configuration, which allows the system to maintain adaptability to changing channel conditions while reducing the frequency of operations that consume power and impact system performance.
Data Source
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AI summary
A user equipment (UE) or network device such a vehicle UE (V-UE) or pedestrian UE (P-UE) can configure resources independently for communication with other V-UEs / P-UEs to avoid collision and ensure safety. The UEs can operate to independently monitor and configure their own resources via partial sensing window configurations that can dynamically configured to perform resource (re)selection in response to a resource reselection trigger. An exclusion of detected resources that are reduced or occupied by other devices can be performed, and a resource candidate set generated to select resource candidates for long term evolution (LTE) vehicular communications. UE partial sensing mechanisms and congestion control can be enhanced for these communications via efficient power control and signaling reliance for vehicle communication quality, as well as pedestrian safety.