Sidelink Channel Reservation via Time Interval Indication

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Solution Overview

Problem

Existing wireless communication systems face challenges in managing resource collisions during continuous channel reservations for sidelink communications, particularly in unlicensed frequency spectrum bands.

Innovation Solution

A method and apparatus for continuous channel reservation in sidelink communication, where a user equipment (UE) configures another UE with a time interval indication for sidelink transmissions, obtaining a channel occupancy time (COT) through an unlicensed frequency spectrum band, and transmitting control information and data during designated time intervals to prevent resource collisions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If UEs continuously transmit control information and data in unlicensed spectrum without time interval indications, then channel utilization increases, but resource collisions increase

Engineering Contradiction:

Improvechannel utilizationVSAvoidresource collision avoidance

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The transmitting UE includes a time interval indication in the control information before subsequent transmissions occur. This preliminary notification allows receiving UEs to know in advance when resources will be occupied, enabling them to refrain from transmitting during those intervals and avoid collisions while allowing the transmitting UE to continuously utilize the channel.

Inventive Principle:

Principle #10Preliminary action

2Productivity

If UEs perform continuous transmissions during COT, then transmission efficiency improves, but resource coordination complexity increases

Engineering Contradiction:

Improvetransmission efficiencyVSAvoidresource coordination

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The time interval indication is provided in advance in the control information, allowing receiving UEs to pre-coordinate their transmissions. This eliminates the need for complex real-time coordination mechanisms during continuous transmissions, as UEs can autonomously determine when to refrain from transmitting based on the预先 provided time interval information.

Inventive Principle:

Principle #10Preliminary action

3Adaptability or versatility

If receiving UEs monitor all time intervals for potential transmissions, then communication opportunities increase, but energy consumption increases

Engineering Contradiction:

Improvecommunication opportunitiesVSAvoidenergy consumption

Core Design Contradiction:

Adaptability or versatilityVSUse of energy by moving object

Solution Approach 1:

The time interval indication in the control information allows receiving UEs to know in advance which time intervals will be occupied by subsequent transmissions. UEs can therefore enter low-power states during these intervals or refrain from monitoring, reducing energy consumption while still being able to detect and participate in communication opportunities during intervals when resources are available.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12317316B2Method and apparatus for continuous channel reservation for sidelink communication

Publication Date: 2025.05.27 QUALCOMM INC

AI summary

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may obtain a channel occupancy time (COT) in an unlicensed frequency spectrum band. The COT may include an initial time interval for an initial transmission and a subsequent time interval for a subsequent transmission. In the initial time interval, the UE may transmit control information and data to another UE, where the control information indicates the subsequent time interval. The other UE may selectively perform communications during the subsequent time interval. The UE may perform the subsequent transmission during the subsequent time interval.