Sidelink Feedback Resource Selection for Flexible PSFCH Timing
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Solution Overview
Problem
The fixed preconfigured period of the Physical Sidelink Feedback Channel (PSFCH) in sidelink communication scenarios limits the flexibility of transmitting feedback information, leading to mismatches with data delay requirements and frequent switching between sender and receiver, resulting in energy consumption and resource overhead.
Innovation Solution
Dynamic indication information is added to the control information for the Physical Sidelink Share Channel (PSSCH) to flexibly select periodic feedback resources, allowing for more efficient use of the PSFCH resources by adjusting the feedback timing and frequency domain allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the PSFCH uses a preconfigured fixed period, then the feedback resource allocation is simple and predictable, but the flexibility of transmitting feedback information is limited and cannot adapt to different data delay requirements
Solution Approach 1:
The patent applies dynamics by making the feedback resource selection adaptive rather than fixed. The receiving end device dynamically selects feedback resources based on indication information in the control information, allowing the system to adapt to different data delay requirements and traffic patterns while maintaining manageable complexity through standardized selection rules.
Solution Approach 2:
The patent changes the parameter of feedback resource timing from a fixed preconfigured value to a dynamically selectable value based on indication information. This allows the feedback period and time slot allocation to be adjusted according to actual communication needs, resolving the contradiction between adaptability and complexity.
2Use of energy by moving object
If the PSFCH feedback period is fixed, then the resource pool configuration is simple, but frequent switching between sender and receiver occurs, increasing energy consumption and resource overhead
Solution Approach 1:
The patent enables dynamic adjustment of feedback timing through the indication information mechanism. The receiving end can select feedback resources that optimize the balance between energy consumption and feedback delay based on actual traffic conditions, data priority, and channel state, rather than being constrained by a fixed period.
Solution Approach 2:
The patent allows changing the feedback period parameter dynamically by selecting different periodic feedback resources based on indication information. This enables the system to extend the feedback period when possible to reduce switching frequency and energy consumption, while maintaining shorter periods when low latency is required.
3Adaptability or versatility
If the PSFCH uses periodic feedback resources with fixed timing, then the resource allocation is deterministic, but it cannot accommodate different data priority levels and user equipment identities
Solution Approach 1:
The patent applies local quality by allowing different feedback resource selections for different data transmissions based on their specific characteristics such as priority level and UE identity. Each data transmission can be associated with appropriate feedback resources through the indication information, enabling differentiated handling while maintaining ease of operation through standardized selection criteria.
Data Source
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AI summary
Provided are an electronic device, a wireless communication method and a computer-readable storage medium. The electronic device comprises a processing circuit configured to: receive first data and control information of the first data by means of a sidelink, the control information comprising indication information used for indicating the selection and use of a periodic feedback resource; determine a feedback resource for the first data on the basis of the control information of the first data; and send feedback information for the first data by using the determined feedback resource. According to at least one aspect of the embodiments of the present invention, in control information of data transmitted by means of a sidelink, dynamic indication information is added to indicate the selection and use of a periodic feedback resource, so that feedback information can be sent by using the periodic feedback resource in a relatively flexible manner.