Pollution Report-Based Retransmission in Wireless Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current communication networks face inefficiencies in retransmission processes due to the need for multi-bit HARQ feedback for each transport block, leading to signaling overhead and resource allocation issues, especially in scenarios where decoding failures occur across multiple code block groups.
Innovation Solution
A receiver and transmitter system that utilizes a 'pollution report' to identify impaired resources likely to cause decoding failures, allowing for a single message to request retransmissions or additional redundancy for all affected resources, reducing the amount of information needed for retransmissions and signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multi-bit HARQ feedback is used for each transport block to indicate decoding failures in code block groups, then decoding reliability is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts only the essential information needed for retransmission requests by introducing a pollution report that identifies impaired resources. Instead of transmitting detailed multi-bit HARQ feedback for each code block group, the system extracts and reports only the resource impairment status, significantly reducing signaling overhead while maintaining the ability to request targeted retransmissions.
Solution Approach 2:
The patent inverts the traditional feedback approach by having the transmitter proactively provide pollution reports about impaired resources to the receiver. This allows the receiver to make informed decisions about retransmission requests without needing to send detailed feedback about each code block group's decoding status, effectively reversing who provides the detailed information.
2Reliability
If detailed retransmission feedback is sent for multiple code block groups, then error correction effectiveness is improved, but resource allocation complexity increases
Solution Approach 1:
The patent extracts the critical resource impairment information into a separate pollution report structure. This extraction simplifies the resource allocation process by providing a clear, consolidated view of which resources are impaired, allowing the transmitter to efficiently allocate retransmission resources without complex analysis of individual code block group feedback.
Solution Approach 2:
The patent implements preliminary action by having the transmitter generate and provide pollution reports about impaired resources before the receiver needs to request retransmissions. This advance information provides the receiver with the knowledge needed to make efficient retransmission decisions without requiring complex real-time analysis of multiple code block group statuses.
3Productivity
If retransmission requests include information about specific code block groups, then retransmission efficiency is improved, but message length increases
Solution Approach 1:
The patent extracts the essential retransmission information into a compact pollution report format. Instead of including detailed information about each code block group's decoding status in the retransmission request message, the system extracts and references the impairment information from the pre-provided pollution report, significantly reducing message length while maintaining retransmission efficiency.
Solution Approach 2:
The patent inverts the information flow by providing detailed resource impairment information (pollution reports) from the transmitter to the receiver in advance. This allows the receiver to send concise retransmission requests that reference the pre-provided impairment information, effectively reversing who sends the detailed information and when it is sent.
Data Source
AI summary
A receiver includes an antenna, a transceiver coupled to the antenna, a decoder and a processor. The transceiver receives from a transmitter of a wireless communication network a data block. The data block includes encoded data transmitted on a plurality of resources allocated to the receiver. The decoder decodes the encoded data and determines for the allocated resources whether decoding of the encoded data was successful or failed. The processor evaluates whether one or more of the resources for which the decoding failed are included in a report, the report indicating for one or more of the allocated resources that encoded data transmitted on the one or more allocated resources is not decodable or is likely to be not decodable, and causes the transceiver to send a retransmission request to the transmitter responsive to the evaluation.