Sidelink Resource Pool Management for Wireless Congestion Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing congestion control in Device-to-Device (D2D) communication, leading to packet dropping and resource congestion, especially when the channel busy ratio is high, despite available capacity in exceptional resource pools.
Innovation Solution
A method and apparatus that determine the use of an exceptional resource pool based on specific conditions, including a high channel busy ratio and packet dropping during congestion control operations, to prevent packet loss and optimize resource utilization by expanding available resources for sidelink signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If congestion control is performed in the normal resource pool, then resource utilization is improved, but packet dropping occurs when channel busy ratio is high
Solution Approach 1:
The resource pool is segmented into normal resource pool and exceptional resource pool. The normal resource pool is used for regular congestion control operations, while the exceptional resource pool is reserved for scenarios where channel busy ratio exceeds thresholds, preventing packet dropping by providing an alternative resource pool.
Solution Approach 2:
The system dynamically changes the parameter of resource pool selection based on channel busy ratio. When the channel busy ratio exceeds a predetermined threshold, the system switches from using the normal resource pool to the exceptional resource pool, optimizing both resource utilization and packet delivery reliability.
2Reliability
If exceptional resource pool is used, then packet dropping is prevented, but resource pool complexity increases
Solution Approach 1:
The exceptional resource pool is extracted as a separate entity from the normal resource pool. This allows the system to maintain simple congestion control procedures for normal operations while having a pre-configured alternative (exceptional pool) ready for high channel busy ratio scenarios, minimizing the increase in complexity.
Solution Approach 2:
The exceptional resource pool is pre-configured with specific parameters including channel busy ratio thresholds. This preliminary configuration eliminates the need for complex real-time decisions about resource pool creation and parameter setting, reducing operational complexity while maintaining reliability.
3Reliability
If channel busy ratio threshold is set low, then packet dropping is reduced, but normal resource pool congestion increases
Solution Approach 1:
The system implements feedback mechanisms to monitor channel busy ratio continuously. Based on this feedback, the system dynamically determines when to switch between normal and exceptional resource pools, ensuring that the threshold setting optimizes both packet delivery reliability and normal resource pool efficiency through adaptive control.
Data Source
AI summary
There are provided an apparatus, a method and a system, at a first node, and the apparatus comprises: a transmitter operative to transmit sidelink signals to a second node; and a controller operative to determine whether to use an exceptional resource pool based on at least one of a first condition and a second condition, for the transmitter to transmit sidelink signals, wherein the first condition includes that a first channel busy ratio measured during a first congestion control operation regarding a current resource pool is higher than a first threshold, and the second condition includes that at least one packet is determined to be dropped during the first congestion control operation.