Radio Feedback Procedure Handling for Latency Constraints
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In radio communication networks, the inefficiency of using feedback procedures for error correction leads to wastage of radio resources, as data becomes obsolete before retransmissions can be effective, especially in applications with strict latency requirements, where the error rate must be maintained below a certain threshold.
Innovation Solution
A method and node that dynamically adjust the feedback procedure based on latency requirements, employing a first transmission mode with feedback when data is not outdated and a second mode without feedback when data would be obsolete by the time of retransmission, thereby optimizing radio resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If feedback procedure is used for error correction, then error rate is maintained below threshold, but radio resources are wasted when data becomes obsolete before retransmission
Solution Approach 1:
The patent applies dynamics by making the feedback procedure configurable and adaptable based on latency requirements. The system dynamically adjusts whether to use feedback procedures for different data transmissions, switching between enabled and disabled states based on whether the latency requirement allows time for successful retransmission. This resolves the contradiction by making reliability assurance conditional rather than static.
Solution Approach 2:
The patent changes the parameter of feedback procedure configuration based on the latency requirement parameter. When latency requirement exceeds a threshold (indicating sufficient time for retransmission), feedback is enabled to maintain low error rates. When latency requirement is below the threshold (indicating insufficient time), feedback is disabled to conserve radio resources. This parameter-based adaptation resolves the contradiction between reliability and resource efficiency.
2Reliability
If feedback procedure is always used, then data correctness is ensured, but latency requirement may not be met when data becomes obsolete
Solution Approach 1:
The system dynamically adapts the feedback procedure based on the latency requirement. When the latency requirement indicates sufficient time for round-trip feedback and retransmission, the system enables feedback to ensure data correctness. When latency requirement is too strict, the system disables feedback to meet the latency constraint, accepting that retransmission may not complete in time. This dynamic adjustment resolves the contradiction between reliability and latency.
Solution Approach 2:
The system performs a preliminary check of the latency requirement before deciding whether to enable the feedback procedure. By evaluating whether the latency requirement allows sufficient time for feedback and retransmission beforehand, the system avoids unnecessary feedback procedures that would cause latency violations. This preliminary assessment resolves the contradiction by preventing time loss from unnecessary feedback operations.
3Reliability
If feedback procedure is used, then spectral efficiency decreases due to unnecessary retransmissions, but error correction capability is maintained
Solution Approach 1:
The patent changes the operational state of the feedback procedure based on the latency requirement parameter. When latency requirement exceeds the threshold, feedback is enabled to maintain error correction capability. When latency requirement is below the threshold, feedback is disabled to improve spectral efficiency by avoiding unnecessary retransmissions. This parameter-driven state change resolves the contradiction between reliability and productivity.
Solution Approach 2:
The patent extracts the feedback procedure from the mandatory transmission path and makes it conditional. By removing the feedback procedure from always-being-executed operations and placing it under conditional execution based on latency requirements, the system eliminates unnecessary feedback transmissions that would reduce spectral efficiency. This extraction resolves the contradiction by separating error correction capability from unconditional execution.
Data Source
AI summary
A method and a first node for handling a feedback procedure requiring transmission of feedback messages indicating either an acknowledgement, ACK, or a non-acknowledgement, NACK, of correct reception of data transmitted on a forward link in a radio communication with a second node in a radio network. The first node obtains a latency requirement of the radio communication corresponding to the time from transmission of the data until the data becomes outdated. The first node further applies a first transmission mode employing said feedback procedure when the latency requirement is above a latency threshold, and applies a second transmission mode omitting said feed back procedure when the latency requirement is below the latency threshold.