Sidelink Feedback Control for PSSCH Resource Timing
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Solution Overview
Problem
In wireless communication systems, particularly in the first mode where network devices allocate transmission resources, the uncertainty about the activation or deactivation of sidelink feedback by terminal devices leads to inefficient resource allocation, reducing communication reliability due to unreasonably allocated resources.
Innovation Solution
The terminal device determines whether to activate or deactivate sidelink feedback based on the time interval between configured transmission resources, ensuring sufficient processing time for data transmission, or indicates this status to the network device for proper resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the network device allocates transmission resources without knowing the SL feedback status, then resource allocation can be performed, but the allocation becomes unreasonable and reduces communication reliability
Solution Approach 1:
The terminal device reports its SL feedback status (activated or deactivated) to the network device. The network device uses this feedback information to make reasonable resource allocation decisions, ensuring that resources are allocated appropriately based on whether the terminal device can process and respond to SL feedback within the allocated time interval.
Solution Approach 2:
The terminal device determines its SL feedback status in advance before resource allocation occurs. By pre-determining whether it can activate or deactivate SL feedback based on the time interval between transmission resources, the terminal device provides accurate status information to the network device for proper resource allocation.
2Reliability
If the terminal device activates SL feedback, then communication reliability improves through retransmission capability, but processing time requirements increase and may cause unreasonable resource allocation
Solution Approach 1:
The terminal device dynamically adjusts its SL feedback status (activate or deactivate) based on the time interval between transmission resources. When the time interval is sufficient, the terminal device activates SL feedback to improve reliability. When the time interval is insufficient, the terminal device deactivates SL feedback to avoid processing time conflicts, allowing flexible adaptation to different resource allocation scenarios.
Solution Approach 2:
The terminal device changes the parameter of SL feedback status (activated/deactivated) based on the time interval parameter between transmission resources. This parameter change allows the system to optimize between reliability and processing time by adjusting the feedback mechanism according to the available time window.
3Speed
If the network device allocates resources without considering SL feedback status, then allocation speed is maintained, but data transmission may fail due to insufficient processing time
Solution Approach 1:
The terminal device provides feedback information about its SL feedback status to the network device. This feedback enables the network device to adjust resource allocation decisions to ensure sufficient processing time for data transmission and feedback handling, thereby improving reliability without significantly slowing down the allocation process.
Solution Approach 2:
The terminal device pre-determines its SL feedback capability based on the time interval before resource allocation occurs. This preliminary determination allows the network device to allocate resources with confidence that the terminal device can process feedback within the allocated time, preventing transmission failures.
Data Source
AI summary
Methods for wireless communication and a terminal device are provided. The method includes the following. A terminal device obtains configuration information transmitted by a network device, where the configuration information is used to configure multiple transmission resources for the terminal device, the transmission resources include multiple sidelink (SL) transmission resources, and the SL transmission resources are used for physical sidelink shared channel (PSSCH) transmission. The terminal device determines whether to perform SL transmission on part of the SL transmission resources according to a time interval between the multiple transmission resources.