Network Coded Packet Broadcasting Feedback Sidelink
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Solution Overview
Problem
Wireless communication systems face inefficiencies due to the lack of feedback in packet broadcasting, leading to unnecessary duplication and waste as transmitters continue to rebroadcast packets without knowing which have been decoded by receivers.
Innovation Solution
Implementing feedback-based techniques for broadcasting network coded packets using sidelink communications, where receivers decode packets and provide feedback to the transmitter, allowing the transmitter to update and optimize the packet transmission based on decoding status.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If blind broadcasting is used without feedback, then the transmission process is simple and fast, but packet duplication increases and network efficiency deteriorates
Solution Approach 1:
The patent implements feedback-based broadcasting where receivers send feedback messages to the transmitter indicating which packets have been successfully decoded. The transmitter uses this feedback information to determine which packets need retransmission, thereby avoiding unnecessary duplication and improving network efficiency. This directly applies the feedback principle to resolve the contradiction between simplicity and efficiency.
2Loss of energy
If packets are continuously rebroadcast without identification of decoded packets, then the transmission process is simple, but unnecessary duplication and waste increase
Solution Approach 1:
The feedback mechanism allows the transmitter to identify which packets have been successfully decoded by receivers and avoid retransmitting them. This reduces energy waste from unnecessary packet duplication while managing complexity through systematic tracking of decoded packet status.
Solution Approach 2:
The transmitter discards (stops retransmitting) packets that have been successfully decoded, as indicated by feedback from receivers. This prevents waste of energy on already received packets while maintaining efficient use of network resources.
3Productivity
If feedback-based broadcasting is implemented, then packet duplication is reduced and efficiency improves, but system complexity increases
Solution Approach 1:
The patent implements feedback-based broadcasting where receivers send feedback messages to the transmitter indicating which packets have been successfully decoded. The transmitter uses this feedback information to determine which packets need retransmission, thereby avoiding unnecessary duplication and improving network efficiency. This directly applies the feedback principle to resolve the contradiction between simplicity and efficiency.
Data Source
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AI summary
Methods, systems, and devices for wireless communications are described. A network node may transmit, to a plurality of user equipment (UE), a set of network encoded packets generated using a set of packets. A UE of the plurality of UEs may receive a subset of the set of encoded packets and may decode the subset to determine a first set of decoded packets. The UE may receive a second set of decoded packets from the plurality of UEs. The UE may transmit feedback to the network node that indicates the successfully decoded packets of the first and second sets. The network node may receive the feedback and may determine a subset of the set of packets that was successfully decoded for each UE providing the feedback. The network node may transmit an updated set of network encoded packets to the plurality of UEs.