Network Coding Sublayer Feedback for Wireless Packet Termination
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Solution Overview
Problem
Current wireless communication technologies, such as LTE and NR, face challenges in efficiently terminating network-coded wireless packet transmissions, which can lead to increased latency and resource inefficiencies due to the lack of effective feedback mechanisms for confirming successful packet recovery and termination.
Innovation Solution
The implementation of a network coding sublayer that buffers and decodes radio link control (RLC) protocol data units (PDUs) using network coding algorithms, allowing for feedback generation and transmission to confirm successful packet recovery, enabling the termination of encoded packets based on this feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If network coding is used for wireless packet transmission, then reliability of packet delivery is improved, but latency increases due to lack of feedback mechanisms for termination
Solution Approach 1:
The patent introduces a feedback mechanism where the receiver device sends acknowledgment signals back to the transmitter device to indicate successful decoding of original packets. This feedback enables the transmitter to terminate network-coded packet transmissions timely, resolving the contradiction by maintaining reliability through network coding while reducing latency through feedback-driven termination.
2Reliability
If network coding transmissions continue without termination feedback, then reliability of packet delivery is improved, but resource efficiency deteriorates due to continued transmission after successful recovery
Solution Approach 1:
The feedback mechanism allows the receiver to notify the transmitter when original packets have been successfully decoded from network-coded packets. This enables the transmitter to stop transmitting redundant network-coded packets, thereby improving resource efficiency while maintaining delivery reliability.
Solution Approach 2:
Once the transmitter receives feedback indicating successful packet recovery, it discards the remaining network-coded packets in the transmission buffer. This prevents waste of wireless resources on packets that are no longer needed, resolving the contradiction between reliability and resource efficiency.
3Reliability
If network coding sublayer is added to protocol stack, then packet recovery capability is improved, but device complexity increases
Solution Approach 1:
The patent segments the protocol stack by introducing a dedicated network coding sublayer between the application layer and the transport layer. This segmentation isolates network coding functionality, making the system more manageable and reducing overall complexity while enhancing packet recovery capability.
Solution Approach 2:
The network coding sublayer acts as an intermediary between higher-layer applications and lower-layer transport protocols. It provides packet recovery functionality without requiring modifications to existing protocol layers, thereby improving reliability while minimizing the increase in device complexity.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for efficiently terminating wireless transmissions of network coded packets, for example, between a base station and a user equipment (UE).