5G Receiver Status Report Compression for NACK Efficiency
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Solution Overview
Problem
In 5G communication systems, the efficient transmission of status report information is hindered by large amounts of non-acknowledgment sequence numbers (NACK SNs), leading to increased system performance degradation and real-time processing burdens on user equipment (UE), especially when sequence numbering and automatic retransmission requests are distributed across central and access units.
Innovation Solution
A method is introduced where the receiver identifies non-received packets and transmits status report information indicating consecutively non-received packets, allowing for efficient segmentation and concatenation processes, reducing the real-time throughput burden on UE and enhancing the degree of freedom in segmentation across central and access units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the receiver includes all NACK SNs in status report information when a large amount of data is not received, then the transmitter can identify all missing packets, but the system performance degrades and the processing burden on UE increases
Solution Approach 1:
The patent extracts only the essential information (first NACK SN and consecutive NACK indicator) from the complete set of NACK SNs, removing redundant data while preserving the ability to identify all missing packets through the indicator field
Solution Approach 2:
Instead of listing all NACK SNs explicitly, the patent inverts the approach by providing only the first NACK SN and using a binary indicator to represent the presence of consecutive NACKs, thereby reducing status report size while maintaining completeness
2Device complexity
If sequence numbers are allocated after RLC SDUs are combined by concatenation function, then the RLC PDU information is completely defined, but the real-time processing burden of UE increases
Solution Approach 1:
The patent performs sequence number allocation in advance, before the RLC PDU information is completely defined and before actual transmission time, allowing UE to prepare packet identifiers ahead of time and reduce real-time processing burden
3Device complexity
If functions are distributed with sequence numbering and ARQ performed by CU and segmentation by AU, then functional separation is achieved, but the degree of freedom of segmentation is reduced
Solution Approach 1:
The patent segments the status report information into essential components (first NACK SN, consecutive NACK indicator, and optional additional NACK SNs), allowing flexible configuration and transmission while maintaining functional separation between CU and AU
Data Source
AI summary
The present disclosure relates to a fifth generation (5G) or pre-5G communication system to be provided to support a higher data transmission rate since fourth generation (4G) communication systems like long-term evolution (LTE). A method of a receiver in a wireless communication system is provide. The method includes receiving at least one packet, identifying whether there is a non-received packet among the at least one packet, and transmitting status report information when there is the non-received packet, in which the status report information includes a field indicating whether there are consecutively non-received packets.