Inter-UE Coordination Message Prioritization in Sidelink
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR and LTE, face challenges in efficiently prioritizing inter-user equipment (UE) coordination, leading to resource collisions and reduced spectral efficiency in sidelink communications.
Innovation Solution
Implementing a method for a UE to select and transmit inter-UE coordination information messages based on prioritization rules, such as cast type, HARQ feedback type, and intended receiver status, to optimize resource allocation and avoid collisions in sidelink communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inter-UE coordination information messages are transmitted without prioritization, then all coordination messages can be sent, but resource collisions increase and spectral efficiency decreases
Solution Approach 1:
The patent changes the parameter of message transmission by introducing prioritization rules that assign different priorities to coordination messages based on cast type, HARQ feedback type, and receiver status. This parameter change allows the system to selectively transmit high-priority messages first, resolving the contradiction between reliable message delivery and spectral efficiency by ensuring critical coordination information is transmitted without causing resource collisions.
Solution Approach 2:
The patent segments the coordination message transmission process into prioritized groups based on message type and importance. By dividing messages into different priority levels (e.g., high priority for unicast with HARQ feedback, medium priority for groupcast, low priority for broadcast), the system can transmit segments of messages in a controlled manner, improving both reliability of critical messages and overall spectral efficiency.
2Productivity
If prioritization rules are implemented for inter-UE coordination messages, then resource collisions are reduced and spectral efficiency improves, but system complexity increases
Solution Approach 1:
The patent manages complexity by defining prioritization rules based on changes in specific parameters (cast type, HARQ feedback type, receiver status) rather than complex algorithms. Each parameter has predefined priority levels, making the prioritization logic straightforward to implement in UE devices while achieving improved spectral efficiency through reduced resource collisions.
3Reliability
If coordination messages are prioritized by cast type and HARQ feedback type, then message delivery reliability improves, but message transmission time increases
Solution Approach 1:
The patent applies preliminary action by pre-defining prioritization rules for different message types before transmission occurs. The UE evaluates the cast type, HARQ feedback type, and receiver status in advance to determine message priority, allowing high-priority coordination messages to be transmitted immediately without delay for complex real-time decisions, thus improving reliability while minimizing transmission time.
Data Source
AI summary
Certain aspects of the present disclosure provide a method for wireless communication by a first user equipment (UE). The first UE selects one or more inter-UE coordination information messages based on at least one prioritization rule. The first UE then transmits the selected one or more inter-UE coordination information messages to at least a second UE via a sidelink.