Network Coded Sidelink Feedback Mechanism
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Solution Overview
Problem
In wireless communication systems, base stations are unable to accurately or efficiently manage sidelink communications due to a lack of feedback on network coded sidelink retransmissions, as they are unaware whether transport blocks or packets have been successfully decoded by user equipment (UEs), leading to inefficient resource selection and scheduling.
Innovation Solution
An encoder device is introduced to transmit network coded sidelink retransmissions and receive feedback from UEs, which then aggregates and transmits this information back to the base station, providing feedback on the successful decoding of transport blocks, enabling the base station to make informed scheduling and resource allocation decisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a base station determines packets for network coded retransmission but another device transmits the retransmission, then resource utilization is improved, but the base station loses feedback information about successful decoding
Solution Approach 1:
The patent introduces an intermediary feedback mechanism where the transmitting device (encoder) that sends network coded retransmissions also collects decoding feedback from UEs and relays this information back to the base station. This intermediary role ensures the base station receives necessary feedback information even when another device performs the actual transmission, resolving the information loss problem while maintaining improved resource utilization
2Ease of operation
If the base station schedules sidelink communications without feedback on network coded retransmissions, then scheduling simplicity is maintained, but resource allocation efficiency deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where decoding status information is collected from UEs and transmitted back to the base station. This feedback enables the base station to make informed scheduling decisions about resource allocation for sidelink communications, improving resource allocation efficiency while maintaining relatively simple scheduling operations through structured feedback reporting
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, an encoder device may transmit a network coded sidelink retransmission that is associated with a set of transport blocks (TBs), the set of TBs associated with one or more sidelink transmissions. The encoder device may receive, from one or more user equipments (UEs), first feedback information, associated with the network coded sidelink retransmission, that indicates whether the one or more UEs successfully decoded the set of TBs. The encoder device may transmit, to a base station, second feedback information associated with the network coded sidelink retransmission that is based at least in part on the first feedback information. Numerous other aspects are provided.