Network Coding Configuration for Reliable Low-Latency Wireless Links
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Solution Overview
Problem
Existing wireless communication systems, particularly in Ultra Reliable Low Latency Communications (URLLC), face challenges in ensuring communication reliability and low latency while optimizing bandwidth usage, as mechanisms like packet duplication do not provide sufficient coding diversity and double bandwidth requirements.
Innovation Solution
A method and apparatus for configuring and controlling network coding by sharing a network coding configuration through specific fields in RRC messages and data packets, using standardized protocol messages to manage activation and deactivation, and selecting appropriate transmission modes and coefficients for improved reliability and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If packet duplication is used to ensure communication reliability, then reliability is improved, but bandwidth requirements double
Solution Approach 1:
The patent combines multiple copies of the same packet into a single network-coded packet by performing bitwise XOR operations. Instead of transmitting separate duplicated packets over multiple carriers, the system merges them into one encoded packet that contains the essential information from all copies, thereby reducing bandwidth consumption while maintaining reliability through the network coding mechanism
Solution Approach 2:
The patent changes the transmission parameter from simple packet duplication to network-coded packet transmission. By applying network coding operations (XOR) to the duplicated packets, the system transforms the redundancy mechanism into a more efficient form that reduces bandwidth requirements while preserving the reliability benefits of having multiple transmission paths
2Reliability
If packet duplication is used to ensure communication reliability, then reliability is improved, but coding diversity is insufficient
Solution Approach 1:
The patent transforms the transmission approach from simple duplication to network coding by changing the coding parameter. Instead of sending identical copies, the system applies XOR operations to create network-coded packets that provide coding diversity while maintaining reliability. This parameter change enables the system to achieve both reliability and coding diversity simultaneously
3Adaptability or versatility
If network coding configuration is shared through RRC messages, then configuration agreement is achieved, but signaling overhead increases
Solution Approach 1:
The patent performs network coding configuration agreement in advance through RRC signaling before actual data transmission begins. By establishing the configuration (including XOR operations and carrier mappings) beforehand, the system avoids the need for continuous signaling during data transmission, thereby reducing overall signaling overhead while ensuring both devices are synchronized on the coding parameters
Data Source
AI summary
The present invention concerns a method of wireless communication between a base station and a user equipment, wherein the method comprises: transmitting, by the base station, a data radio bearer configuration; and transmitting packets according to the data radio bearer configuration between the base station and the user equipment; wherein: the data radio bearer configuration comprises a network coding configuration; and the transmitted packets are transmitted according to the network coding configuration.