Sidelink Partial Sensing Using Reservation Timing to Cut Power
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Solution Overview
Problem
Existing sidelink communication technologies consume excessive power due to constant channel sensing, and there is a lack of effective methods for determining time units to be sensed, especially with the introduction of aperiodic resource reservations in 5G V2X.
Innovation Solution
A method for partial sensing is introduced, where a terminal device determines a sensing condition based on a first time unit and first information, including aperiodic or periodic resource reservations, to selectively sense a second time unit, reducing unnecessary sensing and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If constant channel sensing is performed to ensure effective resource selection, then resource selection reliability is improved, but power consumption increases
Solution Approach 1:
The patent applies partial sensing by determining a subset of time units to sense rather than sensing all time units. The terminal device selectively senses only those time units where other terminal devices may perform resource reservation, based on received reservation information, thereby reducing power consumption while maintaining resource selection reliability through targeted sensing of critical time units.
Solution Approach 2:
The patent segments the sensing process by dividing time units into different categories based on resource reservation patterns. Time units are segmented according to whether they contain periodic or aperiodic resource reservations, allowing the terminal device to apply different sensing strategies to different segments, thus optimizing the balance between reliability and power consumption.
2Use of energy by moving object
If partial sensing is implemented to reduce power consumption, then power consumption is reduced, but the ability to detect all potential interference is worsened
Solution Approach 1:
The patent uses preliminary action by first receiving resource reservation information from other terminal devices before determining which time units to sense. This preliminary reception of reservation information allows the terminal device to pre-identify time units where interference may occur, ensuring that subsequent partial sensing focuses on the most relevant time units and does not miss critical interference.
Solution Approach 2:
The patent implements feedback by using received resource reservation information to dynamically determine the sensing strategy. The terminal device continuously monitors reservation information from other devices and adjusts its sensing of time units based on this feedback, ensuring that interference detection remains complete despite reduced sensing coverage.
3Adaptability or versatility
If flexible resource reservation periods (1ms to 1000ms) are supported, then adaptability is improved, but the complexity of determining time units to sense increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the sensing time unit selection based on the resource reservation period parameter. When different reservation periods (from 1ms to 1000ms) are detected, the terminal device changes its sensing strategy accordingly, selecting appropriate time units based on the specific period value, thus maintaining adaptability while managing complexity through parameter-driven decision making.
Data Source
AI summary
A method for partial sensing is performed by a terminal device and includes: determining a sensing condition based on a first time unit and first information; and determining a second time unit to be sensed based on the sensing condition; wherein the first time unit is a time unit where a candidate time-frequency resource for resource selection for a first sidelink transmission is located, and the first information includes at least one of: an aperiodic resource reservation or a resource reservation with a period Ts as 0 for the first sidelink transmission; or a periodic resource reservation or a resource reservation with the period Ts not as 0 for the first sidelink transmission.