Uplink Control Information Distribution Across Cell Groups
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Solution Overview
Problem
Current uplink information transmission methods face challenges in reliability and capacity, especially when using unlicensed spectrum cells, particularly in scenarios where unlicensed spectrum cells are deployed without a licensed spectrum cell, leading to poor reliability and limited capacity.
Innovation Solution
The method involves distributing uplink information across a cell group for transmission, using configuration information from the base station to determine available unlicensed spectrum cells and alternative cells, and implementing timers and priority-based cell selection to ensure reliable transmission, even when unlicensed spectrum cells are unavailable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all uplink control information is transmitted by using a licensed spectrum PCell, then the SCell can transmit only uplink data information, but the limited capacity of the narrowband PCell leads to limited uplink control information transmission capacity and poor reliability
Solution Approach 1:
The patent segments the uplink control information transmission across multiple cells. Specifically, it divides the control information into different types (e.g., HARQ-ACK, CSI, SR) and transmits them through different cells (PCell and SCell), thereby distributing the transmission load and overcoming the capacity limitations of a single narrowband PCell while improving overall reliability
Solution Approach 2:
The patent transitions from a single-dimension transmission model (all control information through PCell) to a multi-dimensional model where different control information types are transmitted through different cells (PCell and SCell). This dimensional expansion in the transmission architecture allows simultaneous utilization of both licensed and unlicensed spectrum resources, increasing overall transmission capacity and reliability
2Adaptability or versatility
If unlicensed spectrum cells are deployed in non co-site manner without a licensed spectrum cell, then spectrum resources are utilized, but no uplink information transmission method is currently proposed resulting in unresolved transmission problems
Solution Approach 1:
The patent creates a universal uplink transmission framework that works across multiple deployment scenarios including co-site deployment with licensed cell, non-co-site deployment without licensed cell, and various CA configurations. The method universally applies cell grouping and information distribution principles regardless of the specific deployment architecture, making the system adaptable and versatile while maintaining reliable transmission
Solution Approach 2:
The patent dynamically adjusts transmission parameters based on the deployment scenario. When deployed without a licensed PCell, the system changes the role of the SCell to also handle uplink control information, effectively changing the functional parameters of the cells to suit the non-co-site deployment scenario while maintaining transmission reliability
Data Source
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AI summary
Embodiments of the present invention provide an uplink information transmission method, an apparatus, and user equipment. The base station configures a cell group for the UE, and sends configuration information of the cell group to the UE, so that the UE sends uplink information by using the cell group, to distribute the uplink information to a plurality of cells in the cell group for transmission, thereby implementing high-reliability transmission of the uplink information. In addition, applying the method to a scenario of co-site deployment of an unlicensed cell and a licensed cell can resolve a problem of a limited PCell capacity; applying the method to a scenario of non co-site deployment of an unlicensed cell and a licensed cell can implement uplink information transmission in such a scenario.