Sidelink Resource Configuration for PC5 Control-Node Feedback
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Solution Overview
Problem
Existing mobile communications systems lack a solution for obtaining uplink resources to transmit sidelink information to a control node during sidelink services based on the PC5 interface.
Innovation Solution
A control node configures and schedules resources for transmitting sidelink information, including PUCCH and PSFCH resources, using offset information and scheduling signaling to manage HARQ-ACK feedback between terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If resource configuration information is sent to terminals for sidelink information transmission, then resource allocation efficiency is improved, but system complexity increases due to additional signaling overhead
Solution Approach 1:
The control node pre-configures resource pools for sidelink information transmission before actual transmission occurs. This preliminary resource preparation enables terminals to directly use pre-assigned resources without real-time allocation negotiations, improving transmission efficiency while reducing instantaneous signaling overhead through batch configuration
Solution Approach 2:
The resource configuration is segmented into multiple resource pools with different characteristics (e.g., different time-frequency resources, different QoS parameters). Terminals can select appropriate resource pools based on specific transmission needs, which distributes the complexity across multiple manageable resource sets rather than requiring a single complex allocation mechanism
2Manufacturing precision
If offset information is used to indicate resource timing, then resource alignment accuracy is improved, but information transmission overhead increases
Solution Approach 1:
The patent uses offset values as parameters to indicate resource timing relationships between PSFCH and PUCCH resources. By changing the timing parameter through offset indication rather than absolute timing specification, the system achieves precise resource alignment while using compact signaling fields that minimize overhead
Solution Approach 2:
The offset information provides only the necessary timing difference rather than complete resource specification. This partial information approach is sufficient for achieving accurate resource alignment since terminals already have baseline timing knowledge from synchronization procedures, avoiding the need to transmit redundant timing data
3Reliability
If dedicated PUCCH resources are allocated for sidelink HARQ-ACK feedback, then feedback reliability is improved, but resource utilization efficiency deteriorates
Solution Approach 1:
The PUCCH resources configured for sidelink HARQ-ACK feedback are designed to serve multiple purposes. The same resource pools can be used for both sidelink feedback and uplink control information transmission, allowing the system to maintain dedicated resource allocation for reliability while achieving shared utilization that improves overall efficiency
Solution Approach 2:
The system enables terminals to autonomously select appropriate PUCCH resources from configured pools based on their specific feedback requirements. This self-service mechanism eliminates the need for dynamic resource requests and allocations, ensuring reliable dedicated resource usage while allowing multiple terminals to independently utilize available resources without centralized coordination overhead
Data Source
AI summary
A resource configuration method, an information transmission method, and a related device are provided. The method includes: configuring, for a first terminal, a resource for transmitting target sidelink information, where the target sidelink information includes at least one of first sidelink information and second sidelink information, the first sidelink information is sidelink information corresponding to a sidelink transmission between the first terminal and a second terminal, and the second sidelink information is sidelink information corresponding to a sidelink transmission between the first terminal and the control node.