PUCCH Control Signal Transmission Using SORTD and Channel Selection
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Solution Overview
Problem
In wireless communication systems, simultaneous transmission of control signals such as ACK/NACK and SR information is challenging due to resource constraints and the need for reliable PUCCH transmission, especially in LTE and LTE-Advanced systems, where existing methods do not effectively utilize antenna diversity to enhance signal quality.
Innovation Solution
The method involves a User Equipment (UE) using channel selection and Spatial Orthogonal Resource Transmit Diversity (SORTD) to simultaneously transmit ACK/NACK and SR information through multiple antennas, allocating additional PUCCH resources for improved reliability and resource utilization, allowing for simultaneous reception by the base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control signals are transmitted through a single antenna, then device complexity is reduced, but reliability of control signal transmission deteriorates
Solution Approach 1:
The patent divides the control signal transmission into multiple independent paths by using multiple antennas (first antenna and second antenna) to transmit ACK/NACK information through different uplink control channel resources. This segmentation allows the system to achieve diversity gain and improve reliability without requiring a completely new transmission architecture.
Solution Approach 2:
The patent introduces spatial diversity by adding the antenna dimension to control signal transmission. Instead of relying on a single transmission path, the system transmits the same control information through multiple spatial paths (different antennas and their corresponding uplink control channel resources), thereby improving reliability through spatial diversification.
2Reliability
If multiple antennas are used for simultaneous transmission, then reliability of control signal transmission is improved, but resource allocation complexity increases
Solution Approach 1:
The patent makes the uplink control channel resources multi-functional by allowing the same resource structure to be used across multiple antennas. The first uplink control channel resource and second uplink control channel resource follow the same allocation patterns and formatting rules, enabling the system to handle multiple antenna transmissions using a unified resource management framework rather than requiring separate specialized resources for each antenna.
3Productivity
If control signals are transmitted simultaneously through multiple antennas, then transmission efficiency is improved, but difficulty of signal reception increases
Solution Approach 1:
The patent applies different local characteristics to transmissions from different antennas. Each antenna transmits through its own dedicated uplink control channel resource with specific resource allocation patterns, allowing the base station to separately process and decode signals from each antenna path. This local differentiation simplifies the reception process compared to trying to separate signals that share the same resource.
Data Source
AI summary
The present invention relates to a method and an apparatus allowing a simultaneous transmission of control signals in a wireless communication system.