Uplink Control Information Orthogonal Resource Allocation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing 2-step RACH solution for uplink control information (UCI) transmission in URLLC and IoT scenarios lacks flexibility, leading to resource collisions and decreased demodulation success rates due to identical transmission parameters for all users, and overlapping UCI resources among multiple users.
Innovation Solution
A method where terminal devices determine unique resource sets for UCI transmission based on preambles or DMRS ports, ensuring orthogonal resource usage among users, thereby avoiding collisions and increasing demodulation success rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the network device configures the same transmission parameters for all users in a cell, then the configuration is simple and uniform, but the PUSCH transmission becomes inflexible and cannot adapt to different user requirements
Solution Approach 1:
The patent applies local quality by allowing different users to select different transmission parameters (MCS, HARQ process, number of repetitions, initial transmission indication, or retransmission indication) from a set of configured parameters based on their specific requirements. This enables each user to have customized transmission characteristics while the network device maintains a unified configuration set, thus achieving both simplicity in configuration management and flexibility in actual transmission.
2Adaptability or versatility
If the network device configures different transmission parameters for each user to improve flexibility, then PUSCH transmission becomes adaptable, but multiple users transmitting UCI on the same PUSCH resource causes resource overlap and decreases UCI demodulation success rate
Solution Approach 1:
The patent applies segmentation by dividing the UCI resource space into orthogonal resource sets, where each user is assigned to a specific resource set based on their selected transmission parameters. This segmentation ensures that UCIs from different users occupy different time-frequency resources, eliminating resource overlap and collision. The network device can then demodulate each user's UCI independently without interference, thus maintaining high demodulation success rate while supporting flexible parameter selection for each user.
3Productivity
If multiple users transmit UCI on the same PUSCH resource, then resource utilization is efficient, but resource collision occurs and UCI demodulation success rate decreases
Solution Approach 1:
The patent resolves the contradiction by introducing an additional dimension of resource differentiation through orthogonal resource sets. Instead of allowing all users to share the same UCI resources, the system creates multiple distinct resource sets (different time-frequency resources) and assigns users to different sets based on their transmission parameters. This dimensional separation enables efficient resource utilization across the system while ensuring reliable individual UCI demodulation for each user, as their UCIs do not collide in the resource domain.
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
This application provides an uplink control information transmission method and apparatus. The method includes: determining, by a terminal device, a preamble that needs to be sent; determining, by the terminal device based on the preamble, a first resource set that is in a physical uplink shared channel resource and that is used to send uplink control information, where the PUSCH resource includes a plurality of resource sets, the plurality of resource sets include the first resource set, an intersection set of any two resource sets in the plurality of resource sets is an empty set, each resource set is corresponding to one preamble set, and an intersection set of preamble sets corresponding to any two resource sets is an empty set; and sending, by the terminal device, the uplink control information and uplink data on the PUSCH resource, where the uplink control information is mapped to the first resource set, the uplink data is mapped to a resource that is other than the plurality of resource sets and that is in the PUSCH resource, and no information or uplink data is mapped to a resource set that is other than the first resource set and that is in the plurality of resource sets.