UE Network Coding Capability Signalling for Reliable 5G Links
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Solution Overview
Problem
Existing wireless communication systems, particularly in 5G networks, face challenges in ensuring communication reliability and low latency for applications like URLLC, with packet duplication methods like PDCP not being optimal due to lack of coding diversity and increased bandwidth requirements, and there is a need to assess network coding capabilities effectively.
Innovation Solution
A method for signaling network coding capabilities through UE devices, allowing them to indicate support for specific network coding schemes and restrictions, enabling base stations and core networks to activate network coding based on UE capabilities, using RRC messages for information exchange.
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 and coding diversity is lost
Solution Approach 1:
The patent changes the parameter of data transmission by introducing network coding operations that transform original packets into coded packets. Instead of simply duplicating packets across multiple carriers, the system applies encoding coefficients to create linear combinations of packets, thereby improving reliability through coding diversity while maintaining efficient bandwidth utilization.
Solution Approach 2:
The patent replaces the mechanical packet duplication mechanism with a network coding mechanism. Rather than physically copying and transmitting identical packets over multiple carriers, the system substitutes this with mathematical encoding operations that generate coded packets, achieving better reliability through coding theory while reducing bandwidth consumption.
2Productivity
If network coding is activated without capability assessment, then communication efficiency may improve, but device compatibility and performance may deteriorate
Solution Approach 1:
The patent implements preliminary capability assessment through RRC signaling messages exchanged between the UE and base station before network coding activation. The UE reports its network coding capabilities including supported schemes and restrictions, allowing the network to pre-evaluate compatibility and configure appropriate parameters, thereby ensuring reliable operation before actual network coding deployment.
3Adaptability or versatility
If network coding is supported under all conditions, then versatility is improved, but processing load and battery consumption increase
Solution Approach 1:
The patent introduces dynamic capability reporting where the UE can update its network coding capability status based on current processing load and battery conditions. The UE reports restrictions such as maximum number of supported network coded streams or temporary inability to perform network coding when processing load is high or battery level is low, allowing the system to adapt network coding activation to current device conditions and avoid excessive energy consumption.
Data Source
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AI summary
The present invention concerns a method of transmitting over a radio access network to a base station, by a network entity, a radio resource control signalling indicating the capability of a user equipment to perform network coding, wherein the method comprises: detecting by the network entity of a trigger event for signalling to the base station, the network coding capabilities of the user equipment; generating by the network entity a radio resource control signalling message comprising the user equipment network coding capabilities; and transmitting by the network entity of the generated radio resource control signalling message to the base station.