Wireless Receiver Control Portion Decoding for Unnecessary Retransmission Detection
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Solution Overview
Problem
In wireless communication systems, unnecessary retransmissions occur when the original transmitter fails to receive an acknowledgement (ACK) despite successful message reception, leading to redundant data processing and potential resource wastage.
Innovation Solution
An apparatus and method that decode the control portion of a wireless communication transmission to determine if the data portion has been successfully decoded and acknowledged previously, triggering an acknowledgement without completing the data decode, and initiating alternate transmissions with boosted power or reduced modulation and coding schemes in response to detected unnecessary retransmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transmitter retransmits a message after failing to receive an ACK, then the message can be delivered, but processing resources are wasted when the message was already successfully decoded
Solution Approach 1:
The receiver performs preliminary decoding of the control portion before fully processing the data portion. By checking the NDI and HARQ process number in advance, the system can identify unnecessary retransmissions early and avoid wasting processing resources on already successfully decoded messages.
Solution Approach 2:
The wireless communication transmission is segmented into a control portion and a data portion. The control portion contains HARQ information (NDI and process number) that can be decoded independently to determine whether full data processing is necessary, allowing the system to skip expensive data decoding when unnecessary.
2Productivity
If the receiver decodes the control portion to detect unnecessary retransmissions, then processing efficiency improves, but device complexity increases
Solution Approach 1:
The transmission is divided into control and data portions with different processing requirements. The control portion contains essential HARQ information that can be decoded with simpler processing, enabling early termination of unnecessary full decodes without requiring complex overall system changes.
Solution Approach 2:
The receiver performs only partial decoding (control portion only) when sufficient to make a decision, rather than always performing complete decoding. This partial action approach improves efficiency by avoiding unnecessary full data portion processing while maintaining reliable detection of retransmission necessity.
Data Source
AI summary
The present disclosure describes systems and techniques relating to wireless communications. According to an aspect of the described systems and techniques, an apparatus includes circuitry configured to receive a signal representing a wireless communication transmission; and circuitry configured to process the signal to (i) decode a control portion of the wireless communication transmission, (ii) determine from the decoded control portion that a data portion of the wireless communication transmission was successfully decoded previously and acknowledged, and so the wireless communication transmission is an unnecessary retransmission, and (iii) trigger acknowledgement of the wireless communication transmission being successfully decoded, without completing a decode of the data portion of the wireless communication transmission, when the unnecessary retransmission is detected.