V2X Sidelink Resource Sensing for Power-Saving Allocation

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing vehicle-to-everything (V2X) communication systems face challenges in efficiently managing resource allocation and power consumption, particularly in out-of-coverage scenarios, where wireless transmit/receive units (WTRUs) rely on preconfigured parameters that may not optimize transmission and reception of V2X messages.

Innovation Solution

Implementing a wireless transmit/receive unit (WTRU) with enhanced sensing mechanisms, including long-term and short-term partial sensing procedures, to dynamically determine resource allocation for V2X communications, optimizing power usage and reducing interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If WTRUs use preconfigured parameters for V2X communication in out-of-coverage scenarios, then communication can be established without network assistance, but resource allocation efficiency and power consumption optimization are compromised

Engineering Contradiction:

Improveout-of-coverage operation capabilityVSAvoidresource allocation efficiency

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The patent applies preliminary action by pre-configuring parameters and resource pools before out-of-coverage operation begins. WTRUs are provided with preconfigured resource pools, sensing configurations, and transmission parameters that can be immediately activated when network coverage is lost, enabling seamless transition to autonomous operation without sacrificing resource allocation efficiency

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements dynamics by enabling WTRUs to dynamically adjust resource allocation and sensing parameters based on real-time channel conditions and traffic requirements in out-of-coverage scenarios. The system transitions from static preconfigured parameters to adaptive resource selection, allowing WTRUs to optimize power consumption and transmission efficiency according to actual operating conditions

Inventive Principle:

Principle #15Dynamics

2Reliability

If WTRUs continuously monitor and sense channels for optimal resource selection, then transmission quality is improved, but power consumption increases

Engineering Contradiction:

Improvetransmission qualityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent applies partial action by implementing partial sensing where WTRUs monitor only specific resource pools, subframes, or frequency resources rather than continuously monitoring all available resources. The sensing configuration includes parameters such as sensing window size, subframe spacing, and resource pool selection that can be adjusted to achieve adequate transmission quality while reducing overall power consumption compared to full continuous monitoring

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The patent implements periodic action through configured sensing intervals and discontinuous reception patterns. WTRUs perform channel sensing at periodic intervals rather than continuously, with sensing opportunities occurring at specific subframe periods. This periodic sensing approach maintains transmission quality by detecting channel changes while significantly reducing power consumption by allowing the receiver to enter low-power states between sensing intervals

Inventive Principle:

Principle #19Periodic action

3Reliability

If WTRUs perform comprehensive sensing procedures to avoid resource collisions, then communication reliability is improved, but device complexity and processing overhead increase

Engineering Contradiction:

Improvecollision avoidance capabilityVSAvoidsensing mechanism complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies segmentation by dividing the sensing process into distinct phases and resource pools. The sensing mechanism is segmented into different resource pool types (initialization pools, periodic pools, event-triggered pools), different sensing windows (short-term, long-term), and different measurement aspects (channel busy ratio, reference signal reception). This segmentation allows the system to perform comprehensive collision avoidance through multiple specialized sensing procedures rather than a single complex monolithic process, improving manageability and enabling selective activation based on operating conditions

Inventive Principle:

Principle #1Segmentation

Data Source

PatentEP4543113B1Methods for power saving sensing and resource allocation

Publication Date: 2026.01.28 INTERDIGITAL PATENT HOLDINGS INC

Figure 1A
Figure 1B
Figure 1C

AI summary

A first wireless transmit/receive unit (WTRU) may receive, from a second WTRU, sidelink control information (SCI), including first information indicating if a resource is reserved by the second WTRU, and second information indicating if the second WTRU is a power saving or non-power saving. The first WTRU may measure a reference signal receive power (RSRP) of signals transmitted by the second WTRU. The first WTRU may add a resource to a set of available resources if the first information indicates that the resource is not reserved by the second WTRU. If a resource is reserved, the WTRU may set an RSRP threshold to a first set or second threshold based on a power saving mode of the second WTRU. The first WTRU may add the resource to the set of available resources if the measured RSRP is less than the selected RSRP threshold.