Wireless Communication Apparatus Data Numbering Latency
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Solution Overview
Problem
In the context of 5G wireless communication systems, the removal of processing related to data concatenation from the RLC layer poses challenges for achieving Ultra-Reliable and Low-Latency Communications, particularly due to issues with data discarding and sequence number reordering, which can lead to increased latency and inefficiencies.
Innovation Solution
A wireless communication apparatus and method that performs numbering of data and transmits it without renumbering after discarding, along with discarding notification information, to avoid sequence number reordering and reduce latency, thereby enhancing communication reliability and latency performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If data concatenation processing is removed from the RLC layer to reduce processing complexity, then device complexity is reduced, but sequence number reordering issues arise leading to increased latency
Solution Approach 1:
The patent extracts the data concatenation function from the RLC layer and relocates it to the MAC layer. This removal of concatenation processing from the RLC layer reduces RLC layer complexity while the MAC layer handles concatenation with proper sequence number management, avoiding reordering issues and reducing communication latency.
2Reliability
If sequence number reordering is performed to handle discarded data, then data integrity is maintained, but processing latency increases
Solution Approach 1:
The patent introduces the MAC layer as an intermediary between the RLC layer and higher layers. The MAC layer performs data concatenation and sequence number management, acting as a mediator that ensures data integrity through proper sequencing while avoiding the latency caused by RLC layer reordering operations. The MAC layer's sequence number assignment eliminates the need for subsequent reordering.
3Device complexity
If data is discarded without notification to maintain simplicity, then device complexity is reduced, but communication reliability deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the MAC layer notifies the RLC layer when data is discarded. This notification system provides feedback that allows the RLC layer to maintain data integrity awareness without complex reordering operations. The feedback loop ensures that both layers are aware of discarded data, maintaining communication reliability while keeping the discarding mechanism simple.
Data Source
AI summary
A first wireless communication apparatus includes: a controller configured to perform numbering of multiple pieces of data and transmit the multiple pieces of data that are numbered, to a second wireless communication apparatus, and perform first processing in a case where, among the multiple pieces of data, specific data is discarded after the numbering and before the transmission, wherein the first processing is configured to transmit the multiple pieces of data subsequent to the discarding to the second wireless communication apparatus without renumbering, and transmit discarding notification information that notifies the discarding, to the second wireless communication apparatus.