Sidelink Resource Indication for Feedback Conflict Avoidance
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Solution Overview
Problem
In the LTE system, sidelink transmission between user equipment (UE) can lead to conflicts in resource allocation for feedback information, control information, and service data, as both transmit side UE and receive side UE independently reserve transmission resources, potentially causing time domain resource conflicts.
Innovation Solution
A resource indication method where a first device determines and indicates a resource for transmitting feedback information, allowing the transmit side UE or control node to allocate separate resources for control information and service data, thereby avoiding conflicts with the feedback information resource.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If both transmit side UE and receive side UE independently reserve transmission resources for feedback information, then each device can autonomously manage its resources, but resource conflicts occur in the time domain
Solution Approach 1:
The patent introduces an intermediary resource indication mechanism where the transmit side UE or control node allocates and indicates specific resources for feedback information transmission to the receive side UE. This intermediary allocation process prevents autonomous collisions by coordinating resource usage between devices, thereby resolving the contradiction between autonomous resource management and conflict avoidance.
2Reliability
If separate resources are allocated for control information, service data, and feedback information, then resource conflicts are avoided, but system overhead increases
Solution Approach 1:
The patent merges the resource allocation for control information and service data with the feedback information resource indication process. By indicating the feedback information resource within the same resource allocation message (e.g., SCI or DCI) that already contains control information, the system avoids additional overhead while ensuring separate resource allocation to prevent conflicts.
Solution Approach 2:
The resource indication mechanism serves multiple functions simultaneously: it indicates the resource for feedback information, carries control information, and coordinates resource allocation between transmit and receive sides. This multi-functionality reduces the need for separate dedicated signaling channels, thereby reducing system overhead while maintaining reliable resource separation.
3Extent of automation
If feedback information is transmitted on independently reserved resources, then transmission autonomy is maintained, but resource utilization efficiency decreases
Solution Approach 1:
The patent implements dynamic resource indication where the feedback information resource is flexibly allocated and indicated based on current transmission conditions, rather than being statically pre-configured. This dynamic approach allows the system to adapt resource usage to actual needs, improving utilization efficiency while maintaining the autonomy of the transmit side UE to make allocation decisions.
Data Source
AI summary
A resource indication method applied to a sidelink transmission process. The method includes: determining, by a first device, a first resource, where the first resource is used for transmitting first feedback information; and sending by the first device, first indication information to a second device, where the first indication information is used to indicate the first resource.