Multi-User Uplink Bit Aggregation for URLLC Coding Efficiency
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Solution Overview
Problem
In ultra-reliable and low-latency communication (URLLC) scenarios, such as industrial control and self-driving, the high reliability requirements for small data packets lead to excessive resource consumption, particularly in 5G systems where small data packets result in inefficient use of spectrum resources due to low coding efficiency of LDPC codes.
Innovation Solution
A method for multi-user uplink data aggregation and channel coding is implemented, where multiple terminal devices exchange and aggregate their data, performing bit aggregation and channel coding to increase sequence length and improve coding gains.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If small data packets are transmitted individually in URLLC scenarios, then transmission reliability can be maintained, but spectrum resources are excessively consumed and bandwidth requirements increase
Solution Approach 1:
The patent combines multiple small data packets from different terminal devices into a single aggregated data stream for transmission. By merging individual packets into a unified transmission unit, the system reduces the number of separate transmissions required, thereby decreasing spectrum resource consumption while maintaining the reliability needed for URLLC applications through joint channel coding of the aggregated data.
2Reliability
If more resources are allocated to transmit small data packets with high reliability, then transmission reliability improves, but resource consumption and bandwidth requirements increase
Solution Approach 1:
Multiple small data packets are merged into a single aggregated transmission unit, allowing the system to achieve high reliability through joint channel coding without allocating excessive resources to each individual packet. This combining approach distributes the reliability requirement across a consolidated transmission, reducing overall resource consumption.
Solution Approach 2:
The patent changes the coding parameter by increasing the code length through aggregation of multiple packets. This parameter change enables more efficient channel coding that achieves the required reliability with fewer resources, as longer codes provide better error correction capabilities per unit of resource consumed.
3Reliability
If individual channel coding is performed on each small data packet, then transmission reliability is maintained, but coding efficiency and air interface transmission efficiency decrease
Solution Approach 1:
The patent merges multiple individual channel coding operations into a single joint channel coding operation applied to the aggregated data stream. This consolidation improves coding efficiency by utilizing the statistical properties of multiple packets together, thereby enhancing air interface transmission efficiency while still ensuring the reliability required for each original data packet.
Data Source
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AI summary
This application provides a method and an apparatus for aggregation and transmission of multi-user uplink data. A first terminal device is one of N terminal devices. The first terminal device obtains uplink data of each of the N terminal devices and location information of the uplink data of each of the N terminal devices in an aggregated bit sequence. The terminal device determines the aggregated bit sequence based on the location information and the uplink data of each of the N terminal devices. The terminal device further performs channel coding on the aggregated bit sequence, and sends the aggregated bit sequence to the network device. According to the method, a plurality of adjacent terminal devices exchange original bit information, and the terminal devices perform bit aggregation and channel coding on the exchanged original bit information, to improve coding gains and air interface transmission efficiency.