RRC Network Coding Capability Signaling for Reliable Wireless Links
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Solution Overview
Problem
Existing wireless communication systems, particularly in 5G and IIoT environments, face challenges in ensuring communication reliability and low latency while efficiently utilizing network coding, as existing methods like packet duplication lack coding diversity and increase bandwidth requirements, and UE capabilities are not adequately signaled for network coding support.
Innovation Solution
A method and apparatus for signaling network coding (NC) capabilities in wireless devices, allowing UEs to indicate their NC support, restrictions, and specific schemes through Radio Resource Control (RRC) messages, enabling base stations and core networks to assess and activate NC appropriately.
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 encoded packets using linear combinations. This allows the system to achieve better reliability through coding diversity while using the same bandwidth resources, rather than duplicating packets which would double bandwidth consumption.
Solution Approach 2:
The patent applies different processing to different data streams by supporting multiple network coding schemes (e.g., XOR-based coding, random linear networking) that can be selectively applied to specific traffic flows or channels. This allows optimization of coding strategies for different local conditions while maintaining overall system efficiency.
2Productivity
If network coding is activated to improve communication efficiency, then bandwidth utilization is improved, but device complexity increases due to processing requirements
Solution Approach 1:
The patent implements network coding capability signaling that allows UEs to indicate their supported coding schemes and processing capabilities. The base station can then activate network coding selectively for specific UEs and traffic types, rather than universally applying it to all communications. This partial activation approach maintains communication efficiency for capable devices while avoiding unnecessary complexity for devices with limited processing resources.
3Adaptability or versatility
If comprehensive network coding capability signaling is implemented, then adaptability is improved, but signaling overhead increases
Solution Approach 1:
The patent segments the network coding capability signaling into multiple components: UE capability indication (supported schemes), base station capability indication, and activation state signaling. This segmentation allows the system to transmit only the necessary capability information during initial setup, rather than continuously signaling all possible parameters, thereby reducing ongoing signaling overhead while maintaining comprehensive adaptability.
Data Source
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.