Uplink Control Information Resource Allocation in 5G NR
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G New Radio (NR), face challenges in efficiently allocating resources for uplink control information (UCI) on physical uplink shared channels (PUSCH), which affects the reliability and latency of UCI transmission.
Innovation Solution
A method where a user equipment (UE) maps modulated symbols to resource elements in consecutive symbol periods of a PUSCH, determining the number of symbol periods and resource elements to ensure reliable transmission of UCI, with specific techniques for prioritizing and distributing modulated symbols to optimize resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If modulated symbols are mapped to resource elements in consecutive symbol periods, then resource allocation efficiency is improved, but transmission reliability may deteriorate due to concentrated resource usage
Solution Approach 1:
The patent divides the M1 modulated symbols into two groups: J1 symbols mapped to consecutive resource elements in (N1-1) symbol periods, and K1 symbols mapped to distributed resource elements in the N1th symbol period with separation. This segmentation allows part of the symbols to benefit from consecutive mapping efficiency while another part gains diversity through distribution, resolving the contradiction between resource allocation efficiency and transmission reliability.
Solution Approach 2:
The patent applies different mapping strategies to different portions of modulated symbols. The first J1 symbols receive consecutive mapping for efficiency, while the remaining K1 symbols receive distributed mapping with separation requirements for reliability. This local differentiation of mapping quality allows the system to optimize different parts of the transmission for different objectives.
2Reliability
If more resource elements are allocated to UCI symbols, then transmission reliability is improved, but resource usage efficiency deteriorates due to increased overhead
Solution Approach 1:
The patent applies distributed mapping with separation to only K1 symbols (where K1 = M1 - J1) rather than all M1 symbols. This partial application of the more reliable but less efficient distributed mapping strategy allows the system to achieve enhanced reliability for the critical K1 symbols while maintaining better resource efficiency for the J1 symbols through consecutive mapping.
Data Source
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AI summary
A method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE. The UE obtains M1 modulated symbols to be transmitted on a selected section of a physical uplink shared channel (PUSCH) of the UE, the M1 modulated symbols being for carrying a first category of uplink information. The UE maps J1 modulated symbols of the M1 modulated symbols to occupy each one of J1 resource elements (REs) that are available, in a consecutive (N1-1) symbol periods of the selected section of the PUSCH, for carrying modulated symbols that carries the first category of uplink information. The UE determines a number S1 based on K1 and a number T1. The UE maps K1 modulated symbols of the M1 modulated symbols to occupy K1 REs of the T1 REs such that two adjacent REs among the K1 REs being separated by at least (S1-1) REs.