Sidelink Resource Pool Selection for Congestion Control
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Solution Overview
Problem
Current mobile communication networks face challenges in efficiently managing and optimizing communication protocols across diverse wireless devices and base stations, particularly in supporting multiple technologies and releases, which affects traffic handling and resource allocation.
Innovation Solution
The implementation of advanced NR user plane and control plane protocol stacks, along with flexible bandwidth management and carrier aggregation techniques, enables dynamic configuration and resource allocation to optimize communication in heterogeneous networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If congestion control is implemented in NR V2X communications, then resource allocation efficiency is improved, but device complexity increases due to multiple protocol stacks and technology support requirements
Solution Approach 1:
The patent segments congestion control functionality into separate logical channels and resource pools. Different QoS flows are mapped to different logical channels, each with independent congestion control mechanisms. This allows granular management of resources while maintaining overall system efficiency, resolving the contradiction by organizing complexity into manageable segments.
Solution Approach 2:
The patent implements dynamic congestion control where the network can adjust congestion control parameters, resource pool configurations, and logical channel mappings in real-time based on traffic conditions. This dynamic adaptation enables efficient resource allocation while the system manages complexity through flexible, condition-based control rather than static complex configurations.
2Measurement precision
If multiple QoS parameters are monitored for congestion control, then traffic handling precision is improved, but measurement and control difficulty increases
Solution Approach 1:
The patent divides QoS parameter monitoring into channel-specific measurements for each logical channel. Each channel monitors its own congestion indicators independently, allowing precise tracking of multiple QoS parameters without requiring a single complex measurement system. This segmentation reduces measurement difficulty while maintaining precision.
Solution Approach 2:
The patent implements feedback mechanisms where congestion control indicators are reported back to the network based on monitored QoS parameters. This feedback loop enables precise measurement of multiple parameters while simplifying control by using the measured data to automatically adjust resource allocation and congestion control settings.
Data Source
AI summary
A first wireless device receives, from a base station, one or more messages indicating a plurality of sidelink (SL) resource pools of an SL carrier and a channel busy ratio (CBR) threshold. The first wireless device, in response to a CBR of a SL resource pool being below or equal to the CBR threshold, selects, among the plurality of SL resource pools, the SL resource pool based on: an SL feedback transmission being disabled for an SL logical channel; and the SL resource pool comprising at least one physical sidelink feedback channel (PSFCH) resource. The first wireless device transmits, to a second wireless device via the SL resource pool, an SL data of the SL logical channel.