PUCCH Encoding Adaptation for 5G Control Information
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Solution Overview
Problem
In 5G systems, the existing methods for transmitting short physical uplink control channels (PUCCH) face inefficiencies when dealing with large amounts of control information, resulting in lower channel coding gains and reduced multiuser reusing capability, especially when control information is jointly encoded on two symbols.
Innovation Solution
The proposed solution involves a terminal device determining the manner of generating second information based on the quantity of bits of first information, using either plus-sign or minus-sign repetition on a second symbol relative to a first symbol, or jointly encoding information on two symbols, to optimize channel coding and resource element usage for improved transmission performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control information is jointly encoded on two symbols, then transmission performance is improved, but multiuser reusing capability is reduced
Solution Approach 1:
The patent implements dynamic selection between two encoding modes (single-symbol repetition and two-symbol joint encoding) based on the quantity of control information bits. The terminal device determines the appropriate mode adaptively, allowing the system to switch between high reliability (joint encoding) and high reusability (repetition) scenarios, thus resolving the contradiction between transmission performance and multiuser reusing capability
2Reliability
If control information is jointly encoded on two symbols, then channel coding gain is improved, but resource element efficiency is reduced
Solution Approach 1:
The patent changes the encoding parameter (coding mode) based on the information bit quantity. When bits are few, repetition mode is used with higher resource element efficiency. When bits are many, joint encoding mode is used to achieve better channel coding gain. This parameter adaptation resolves the contradiction between coding gain and resource efficiency
3Adaptability or versatility
If single-symbol repetition encoding is used, then multiuser reusing capability is maintained, but channel coding gain is reduced
Solution Approach 1:
The system dynamically selects between repetition mode (for reusability) and joint encoding mode (for coding gain) based on real-time conditions, specifically the quantity of control information bits. This dynamic adaptation allows the system to maintain multiuser reusing capability when needed while achieving sufficient channel coding gain when information volume justifies it
Data Source
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AI summary
This application provides an information transmission method, a terminal device, and a network device. The method includes: determining, by the terminal device based on a quantity of bits of first information, a manner of generating second information, where the manner of generating the second information includes a first generation manner and a second generation manner, and in the first generation manner, a quantity of bits obtained after channel coding is determined based on a quantity of resource elements that carry the first information and that are on a first symbol of two symbols of a first physical uplink control channel of the terminal device; in the second generation manner, a quantity of bits obtained after channel coding is determined based on a quantity of resource elements that carry the first information and that are on two symbols of a second physical uplink control channel of the terminal device; and generating, by the terminal device in the manner of generating the second information, the second information carried on the two symbols and sending the second information to the network device. In the information transmission method in embodiments of this application, a reusing capability of a user and transmission performance can be improved.