Polar Code Bit Allocation for Low-Latency UE Identification
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Solution Overview
Problem
The increasing number of user equipment (UEs) and limited radio resources in wireless communication systems pose challenges in efficiently transmitting and receiving data, leading to higher latency and the need for new methods to manage high-density nodes and devices, especially with the introduction of new frequency bands that differ from legacy systems.
Innovation Solution
A method using polar codes to efficiently transmit information by inputting D-bit information and a UE ID into specific positions of a size-N polar code, allowing for efficient encoding and transmission of data, thereby improving throughput and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of user equipments (UEs) increases in a wireless communication system, then the communication capacity and service coverage are improved, but the latency increases and the efficiency of data transmission deteriorates due to limited radio resources
Solution Approach 1:
The patent segments the N input bit positions of the polar code into two distinct parts: one part for transmitting D-bit information and another part for transmitting X-bit UE ID. This segmentation allows the system to efficiently multiplex data and control information, enabling better resource utilization and reduced latency when serving multiple UEs simultaneously.
Solution Approach 2:
The patent merges the transmission of information data and UE identification into a single polar code encoding process. By combining these two functions into one unified encoding scheme, the system reduces the number of separate transmission resources needed, thereby improving spectral efficiency and reducing latency in high-density UE scenarios.
2Quantity of substance
If the amount of data and control information to be transmitted increases, then the service capability is improved, but the limited radio resources are consumed faster, leading to reduced transmission efficiency
Solution Approach 1:
The polar code structure described in the patent serves multiple functions simultaneously: it encodes information data, embeds UE identification, and enables efficient resource allocation. This multi-functionality allows the system to transmit both data and control information through a unified mechanism, improving overall transmission efficiency while handling increased information volumes.
Solution Approach 2:
The patent changes the parameter structure of the input bits by dividing them into information bits and UE ID bits with specific allocations to different positions in the polar code. This parameter change enables flexible adaptation to different data sizes and UE identification requirements, optimizing resource usage and maintaining transmission efficiency even as the total amount of information increases.
3Productivity
If new frequency bands are introduced to increase capacity, then the communication throughput is improved, but the system complexity increases due to differences from legacy frequency bands
Solution Approach 1:
The polar code encoding scheme presented in the patent is designed to be universally applicable across different frequency bands. The same encoding structure and bit allocation methodology can be used whether operating in legacy bands or newly introduced bands, thereby increasing throughput in new bands without adding significant system complexity.
Data Source
AI summary
In a wireless communication system, a transmission device inputs, in some of N input bit positions of a polar code having the size N, input bits including D-bit information and X-bit user equipment (UE) ID according to a predetermined bit allocation sequence. The transmission device encodes the input bits by using the polar code. The transmission device transmits an encoded output sequence.