Terminal Device Sidelink Resource Multiplexing via Interference Control
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Solution Overview
Problem
In sidelink communication, the resource utilization during device-to-device (D2D) communication is relatively low due to interference from uplink time-frequency resources used for universal user (Uu) transmission, which degrades communication quality.
Innovation Solution
A method and apparatus that configure terminal devices to send sidelink signals on uplink time-frequency resources based on interference control, using scheduling information to determine interference values and prioritize resource multiplexing, ensuring the interference is within a threshold or meets specific rules to avoid degrading Uu transmission quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminal devices use dedicated resource pools for sidelink communication, then interference with Uu transmission is avoided, but resource utilization is low
Solution Approach 1:
The patent merges sidelink transmission and Uu transmission by allowing terminal devices to multiplex sidelink signals on uplink time-frequency resources. The terminal device determines an interference value based on channel attenuation and transmit power, and sends the sidelink signal only when the interference value meets a preset rule (e.g., is less than an interference threshold). This combines previously separate resource pools into a shared resource pool with interference control.
Solution Approach 2:
The patent changes the parameter control approach by dynamically adjusting transmit power based on channel conditions. The terminal device calculates channel attenuation between itself and the network device, uses this to determine an interference value for the sidelink signal, and compares this interference value against a threshold to decide whether to transmit. This dynamic parameter adjustment enables efficient resource sharing while protecting Uu transmission quality.
2Productivity
If terminal devices multiplex sidelink transmissions on uplink time-frequency resources, then resource utilization improves, but interference to Uu transmission increases
Solution Approach 1:
The patent implements feedback-based interference control where the terminal device continuously monitors channel conditions and calculates interference values. The terminal device determines channel attenuation between itself and the network device, uses this to compute an interference value for the sidelink signal, and compares this against a preset threshold. This feedback loop ensures interference remains controlled while enabling resource multiplexing.
Solution Approach 2:
The patent introduces an interference value as an intermediary metric to mediate between sidelink transmission desires and Uu transmission protection. The terminal device calculates this interference value based on channel attenuation and transmit power, and uses it as a decision criterion. This intermediary parameter enables intelligent resource allocation by translating physical channel conditions into a controllable metric.
Data Source
AI summary
Embodiments of this application provide a resource configuration method and apparatus, so as to improve resource utilization during D2D communication. A first terminal device receives scheduling information that is sent by a network device and that is used to indicate an uplink time-frequency resource used for the first terminal device, and the first terminal device can multiplex the uplink time-frequency resource to send a sidelink signal to a second terminal device when an interference value to the network device during sending of the sidelink signal meets a first rule. Therefore, the uplink time-frequency resource of the first terminal device is multiplexed while interference is considered during sidelink transmission, thereby improving resource utilization.