Uplink Control Information Transmission in Multi-Cell Wireless Systems
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in transmitting uplink control information, particularly in scenarios with multiple cells, where resource management for control information transmission is challenging.
Innovation Solution
A method and apparatus that involve receiving Physical Downlink Control Channels (PDCCHs), generating reception response information, and transmitting it on a Physical Uplink Control Channel (PUCCH), with specific conditions determining whether pre-configured or index-linked PUCCH resources are used, including the use of Scheduling Request (SR) subframes and Transmit Power Control (TPC) fields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple cells are configured for carrier aggregation, then system capacity and data rate are improved, but resource management complexity for control information transmission increases
Solution Approach 1:
The patent segments control information transmission resources by cell type (PCell and SCell). Different PUCCH resources are allocated for PCell PDCCH responses versus SCell PDCCH responses, allowing independent management and optimization of control resources for each cell type, thereby reducing overall resource management complexity while maintaining multi-cell operation
Solution Approach 2:
The patent employs pre-configured PUCCH resources for SCell PDCCH responses. These resources are allocated in advance through higher-layer signaling rather than being determined dynamically at transmission time, which simplifies real-time resource management decisions and reduces control overhead in multi-cell scenarios
2Adaptability or versatility
If dynamic PUCCH resource allocation is used for each PDCCH, then transmission flexibility is improved, but control overhead and signaling complexity increase
Solution Approach 1:
The patent applies different resource allocation strategies to different cell types: PCell PDCCH responses use index-linked PUCCH resources for dynamic adaptation, while SCell PDCCH responses use pre-configured PUCCH resources for reduced signaling. This localized differentiation optimizes the balance between flexibility and complexity for each cell type
Solution Approach 2:
Pre-configured PUCCH resources for SCells are allocated through higher-layer signaling in advance, eliminating the need for dynamic resource indication in SCell responses and thereby reducing control overhead and signaling complexity while maintaining transmission capability
Data Source
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AI summary
The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for transmitting uplink control information where a plurality of cells are configured, and comprises: a step for receiving one or more PDCCH; a step for generating reception response information corresponding to the one or more PDCCH; and a step for transmitting through PUCCH the reception response information in a subframe, wherein the reception response information is transmitted using a PUCCH resource provided in advance by an upper layer signaling when only one PCell PDCCH is detected and the predetermined conditions are met, and is transmitted using a PUCCH resource linked to an index of a resource that makes up the PCell PDCCH when only one PCell PDCCH is detected and the predetermined conditions are not met.