PUCCH Repetition Encoding with Shared Polar Code Length
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, particularly in LTE and 5G networks, the separate encoding of physical uplink control channel (PUCCH) repetitions leads to processing overhead and prevents soft-combining at the base station, reducing the probability of successful decoding.
Innovation Solution
A method where user equipment (UE) ensures a same mother polar code length for generating coded bits for both PUCCH repetitions, even if they have different numbers of resource elements, allowing for shared encoding and improving reliability by enabling soft-combining at the base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If separate encoding is performed for each PUCCH repetition, then the encoding process can be completed independently for each repetition, but processing overhead increases and soft-combining cannot be performed
Solution Approach 1:
The patent merges the encoding process by generating a single set of coded bits from the UCI information that are then reused across multiple PUCCH repetitions. This combining approach eliminates redundant encoding operations and enables the base station to perform soft-combining of the repeated transmissions, thereby improving both encoding efficiency and decoding reliability.
Solution Approach 2:
The patent creates a universal coded bit sequence that serves multiple PUCCH repetition transmissions. Instead of creating separate encoded versions for each repetition, a single encoded version is generated that can be universally applied across all repetitions, allowing the system to achieve both processing efficiency and improved reliability through soft-combining.
2Adaptability or versatility
If different numbers of resource elements are allocated to different PUCCH repetitions, then resource allocation flexibility is improved, but encoding consistency becomes difficult to maintain
Solution Approach 1:
The patent segments the encoding and resource allocation processes. The encoding is performed once to generate a complete set of coded bits, which are then segmented and mapped to different resource elements across multiple PUCCH repetitions. This segmentation allows flexible resource allocation while maintaining encoding consistency, as the same coded bits are used regardless of the specific resource allocation in each repetition.
Data Source
AI summary
Aspects of the present disclosure generally relate to methods and apparatus for encoding repetitions of a physical uplink control channel (PUCCH). In some aspects, the disclosed methods or techniques include first determining that a first number of REs of a first PUCCH repetition used for UCI transmission is different than a second number of REs of a second PUCCH repetition used for the UCI transmission. Based on the determination, the UE performs one or more actions to provide a same mother polar code length for generating coded bits for each of the first and second PUCCH repetitions. The UE performs polar code encoding of information bits of the UCI for the first PUCCH repetition and the second PUCCH repetition based on the same mother polar code length. The UE transmits the first and the second PUCCH repetitions including the respective polar-encoded UCI.