LTE Uplink Channel Configuration for Simultaneous PUSCH and PUCCH
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Solution Overview
Problem
Current LTE systems lack an optimized uplink channel configuration method that can adapt to both single carrier and multi-carrier transmission modes, particularly for configuring CQI when both PUSCH and PUCCH need to transmit data simultaneously, leading to inefficiencies in power management and resource allocation.
Innovation Solution
A network side device configures the uplink transmission mode for UEs by transmitting information about the mode change, obtaining CQI, and adjusting the channel configuration accordingly, using independent closed-loop control for both PUSCH and PUCCH, and setting power headroom thresholds to manage transmission power effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UE sends both PUSCH and PUCCH simultaneously in LTE-Advanced multi-carrier mode, then the data transmission efficiency is improved, but the power control complexity increases
Solution Approach 1:
The patent divides the uplink transmission into separate carriers: one carrier is dedicated for PUSCH data transmission while another carrier is dedicated for PUCCH control information transmission. This segmentation allows independent power control for each channel type, simplifying the overall power management while enabling simultaneous transmission of both data and control information in LTE-Advanced multi-carrier systems.
2Adaptability or versatility
If the uplink transmission mode is changed from single carrier to multi-carrier, then the resource allocation flexibility is improved, but the configuration complexity increases
Solution Approach 1:
The patent introduces dynamic carrier indication information that can be flexibly configured through higher layer signaling. The network can dynamically indicate which carrier should be used for PUCCH transmission while the UE uses another carrier for PUSCH, allowing adaptive resource allocation that responds to changing channel conditions and traffic requirements without requiring complex static configuration.
Solution Approach 2:
The patent changes the transmission parameters by introducing carrier frequency offsets and different subcarrier spacing configurations for PUSCH and PUCCH on different carriers. This parameter differentiation enables flexible resource allocation across the frequency domain while maintaining simplified configuration through standard LTE signaling mechanisms.
3Measurement precision
If CQI is configured for simultaneous PUSCH and PUCCH transmission, then the channel quality feedback accuracy is improved, but the signaling overhead increases
Solution Approach 1:
The patent extracts the CQI feedback requirement from the traditional single-carrier PUCCH format and implements it separately on the dedicated control carrier. By taking out the CQI reporting function and placing it on a separate carrier from data transmission, the system achieves accurate channel quality feedback for both carriers independently while minimizing interference and reducing the complexity of multiplexing CQI with data on the same carrier.
Data Source
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AI summary
The embodiments of the present invention disclose a configuration method, system and device for an uplink channel. The method includes: a network side device configures the uplink transfer mode of a terminal; when the uplink transfer mode is different from the current transfer mode of the terminal, the network side device transmits the message, which carries the uplink transfer mode, to the terminal, as well as enables the terminal to implement the uplink transfer using the uplink transfer mode, obtain the channel quality information according to the uplink transfer mode, and report it to the network side device; the network side device receives the channel quality information reported by the terminal; and the network side device configures the uplink channel according to the channel quality information. The present invention performs the configuration of uplink channels in multicarrier transmission.