User Equipment Feedback Transmission Using IDs
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Solution Overview
Problem
In sidelink communication for V2X, the lack of a specific method for Hybrid Automatic Repeat Request (HARQ) operation leads to misunderstandings due to the inability to correctly identify the source of HARQ-ACK information, causing potential data transmission failures.
Innovation Solution
User equipment transmits feedback information using resources determined by a transmission ID or reception ID, or both, to ensure proper HARQ operation by uniquely identifying the source of the data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If HARQ-ACK information is transmitted from multiple user equipments on the same resource, then resource utilization is improved, but the receiving user equipment cannot identify the source of the feedback information, leading to misunderstandings and potential data transmission failures
Solution Approach 1:
The patent introduces transmission ID and reception ID as intermediary elements that mediate between multiple user equipments transmitting feedback information. These IDs act as unique identifiers that allow the receiving equipment to distinguish which feedback corresponds to which data transmission, thereby maintaining reliability while enabling multiple users to share the same feedback resource.
Solution Approach 2:
The patent applies local quality by assigning different transmission IDs and reception IDs to different user equipments. This creates unique local identifiers for each user pair, allowing the system to maintain individual identification capability within the shared feedback resource, thus resolving the conflict between resource sharing and source identification.
2Device complexity
If a specific method for HARQ operation is not established in sidelink communication, then system complexity is reduced, but proper HARQ operation cannot be executed, causing misunderstandings in feedback interpretation
Solution Approach 1:
The patent changes the parameters of the feedback transmission by introducing transmission ID and reception ID as additional distinguishing parameters. This allows the system to maintain simple resource sharing while adding identification capability through parameter differentiation, thus achieving reliable HARQ operation without significantly increasing system complexity.
3Ease of operation
If feedback information is transmitted without using transmission ID or reception ID, then the transmission process is simplified, but the receiving user equipment cannot correctly identify whether the feedback corresponds to its transmitted data
Solution Approach 1:
The patent applies preliminary action by pre-configuring transmission IDs and reception IDs for each user equipment before feedback transmission occurs. This allows the feedback information to be transmitted in a simplified manner while the pre-established ID system ensures that source identification is automatically maintained, thus achieving both simplicity and information preservation.
Data Source
AI summary
A user equipment including: a reception unit configured to receive sidelink data from a transmission side user equipment; and a transmission unit configured to transmit feedback information for the sidelink data, wherein the transmission unit transmits the feedback information using a resource determined based on a transmission ID that is an ID on the transmission side user equipment, or a reception ID that is an ID on the user equipment, or both of the transmission ID and the reception ID.