Wireless Communication Device Range-Based Retransmission Control
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Solution Overview
Problem
In wireless communication systems, especially in scenarios with limited resources or large numbers of receiving ends, it is not always necessary to transmit retransmission requests (NACK) for incorrectly received data packets, as this can lead to resource inefficiencies and incorrect determination of receiving ends that require retransmissions.
Innovation Solution
The proposed solution involves an electronic device that transmits first control information indicating a communication range threshold to other devices, which use this information to determine Positioning Reference Signals (PRS) and estimate the distance between devices. Based on this comparison, the receiving end devices decide whether to transmit a retransmission request.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If every receiving end transmits a retransmission request (NACK) when failing to decode a data packet, then the reliability of data transmission is improved, but the resource consumption and system interference increase
Solution Approach 1:
The patent applies local quality by making the NACK transmission behavior conditional rather than universal. Receiving ends within the communication range threshold transmit NACK, while those beyond the threshold do not. This creates a spatially differentiated feedback mechanism where only locally relevant devices contribute to retransmission decisions, reducing overall system resource consumption while maintaining reliability for devices that can actually receive retransmissions.
Solution Approach 2:
The patent implements partial action by having only a subset of receiving ends transmit NACK based on their distance from the transmitting end. Instead of all receiving ends participating in HARQ feedback, only those within the communication range threshold do so. This partial participation is sufficient to maintain reliability for devices within range while avoiding the resource waste of having all devices transmit feedback.
2Loss of information
If every receiving end transmits a retransmission request (NACK) when failing to decode a data packet, then the completeness of feedback information is improved, but the difficulty of determining which receiving ends need retransmission increases
Solution Approach 1:
The patent simplifies determination complexity by creating a clear spatial boundary (communication range threshold) that automatically qualifies which receiving ends should transmit NACK. The transmitting end only needs to compare device identifiers against this threshold rather than processing feedback from all receiving ends. This local quality approach makes the determination process straightforward and efficient.
3Reliability
If a retransmission request is transmitted in broadcast or multicast communication, then the individual receiving end's data reception reliability is improved, but the overall system performance and transmitting end's determination accuracy deteriorate
Solution Approach 1:
The patent resolves this contradiction by applying local quality to multicast/broadcast scenarios. Each receiving end's NACK transmission decision is made independently based on its own distance from the transmitting end relative to the communication range threshold. This ensures that individual devices within range maintain high reliability while the transmitting end receives feedback only from devices that can actually benefit from retransmission, preserving overall system performance.
Solution Approach 2:
In multicast and broadcast communication, the patent implements partial action by having only receiving ends within the communication range threshold transmit NACK. This partial feedback mechanism is sufficient to maintain reliability for affected devices while avoiding the system performance degradation that would result from all receiving ends transmitting feedback in large-scale broadcast scenarios.
Data Source
AI summary
The present invention relates to an electronic device and method for a wireless communication system, and a storage medium. An electronic device for a wireless communication system, comprising a processing circuit, configured to: send first control information to one or more second electronic devices, the first control information at least comprising information indicating a communication range threshold of an electronic device and being used for determining one or more PRSs, wherein the one or more PRSs are sent by the electronic device, and is used by the second electronic device to estimate the distance between the electronic device and the second electronic device, and the second electronic device is able to determine, according to a comparison between the communication range threshold and the estimated distance, whether to send a retransmission request to the electronic device in response to unsuccessfully decoding a data packet sent by the electronic device.