Channel Quality Reporting for Direct Links in V2X
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Solution Overview
Problem
In communication technologies, particularly in direct links within LTE and NR systems, there is a challenge in effectively reporting channel quality, especially when a Transmitter UE (Tx UE) is out of network coverage, requiring efficient methods for channel quality reporting to adapt resource allocation for V2X services.
Innovation Solution
A channel quality reporting method where a UE receives report indication information, determines the direct links based on this information, and reports the channel quality or related information to the base station, using configured uplink resources, enabling the base station to adapt resource allocation for improved transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a Tx UE is out of network coverage and uses automatic resource selection mode, then the UE can select resources for direct communication from a pre-configured resource pool, but the base station cannot effectively adapt resource allocation to channel conditions of different direct links
Solution Approach 1:
The base station pre-configures resource pools and report indication information before the UE goes out of coverage. The UE performs channel quality measurements and prepares reports using pre-configured parameters, enabling seamless continuation of adaptive resource allocation even when out of coverage.
Solution Approach 2:
Channel quality reports act as an intermediary mechanism, transmitting critical channel state information from UEs to the base station. This enables the base station to maintain awareness of direct link conditions and make informed resource allocation decisions despite the UE being out of coverage.
2Measurement precision
If the UE reports channel quality of all direct links, then the base station can make accurate resource allocation decisions, but the reporting overhead and signaling complexity increase
Solution Approach 1:
The base station configures different report indication information for different direct links based on their specific conditions. Each direct link can have customized reporting requirements (e.g., reporting frequency, triggered events, measurement parameters), allowing accurate channel quality feedback while minimizing unnecessary reporting overhead for each specific link.
Solution Approach 2:
Instead of requiring reports for all direct links unconditionally, the system uses selective reporting where only specific direct links meeting certain criteria (indicated by report indication information) need to send channel quality reports. This reduces overall reporting complexity while maintaining sufficient accuracy for resource allocation.
Data Source
AI summary
A channel quality reporting method and apparatus for direct links, a storage medium, and a user equipment are provided. The channel quality reporting method includes: receiving report indication information, wherein the report indication information indicates at least one direct link that needs to be reported or a report condition; determining at least one reported direct link at least based on the report indication information; and reporting channel quality of the at least one reported direct link or information of the at least one reported direct link.