Uplink Power Control for Distinct TTI Lengths
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Solution Overview
Problem
Conventional LTE systems lack a definitive method for separately configuring power control parameters for different Transmission Time Interval (TTI) lengths, which affects channel estimation performance and data transmission reliability.
Innovation Solution
A method and device for controlling uplink transmission power by determining separate power control parameters for different TTI lengths, allowing for accurate configuration of transmission power based on specific TTI types, such as normal and short TTI lengths, using configuration information and power adjustment values from downlink control channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate power control parameters are configured for different TTI lengths, then channel estimation accuracy and transmission reliability are improved, but device complexity and configuration complexity increase
Solution Approach 1:
The patent applies parameter changes by introducing TTI length as a distinguishing parameter for power control configuration. Different power control parameters (P0, alpha, path loss compensation) are assigned based on TTI length (normal TTI vs. short TTI), allowing the system to adapt power control settings to match the specific requirements of each TTI type, thereby improving transmission reliability without requiring fundamentally new configuration mechanisms
Solution Approach 2:
The patent segments the power control configuration into distinct sets for different TTI lengths. The base station separately configures and indicates power control parameters for normal TTI and short TTI through downlink control information, enabling independent optimization of power control for each TTI type while maintaining clear separation in configuration and management
2Manufacturing precision
If separate power control parameters are configured for different TTI lengths, then transmission performance is improved, but signaling overhead and control channel complexity increase
Solution Approach 1:
The patent employs universality by using the existing downlink control information structure to carry power control parameters for both normal TTI and short TTI. The same control channel mechanisms and signaling formats are utilized for both TTI types, allowing the system to achieve separate power control configuration without requiring additional dedicated signaling channels or fundamentally new communication protocols
Solution Approach 2:
The patent changes parameters within the existing control signaling framework by including TTI length-specific power control parameters (such as different P0 values, alpha values, or path loss compensation parameters) in the downlink control information. This allows precise transmission performance optimization through parameter differentiation while reusing the established signaling infrastructure, thereby limiting the increase in signaling overhead
Data Source
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AI summary
The present disclosure provides a method, a device and an apparatus for controlling uplink transmission power, and a storage medium. The method includes: receiving, by a UE, configuration information, and determining a PC parameter corresponding to a TTI length of a first type and a PC parameter corresponding to a TTI length of a second type in accordance with the configuration information; and determining, by the UE, transmission power of a channel which is transmitted using the TTI length of the first type in accordance with the PC parameter corresponding to the TTI length of the first type, and transmission power of a channel which is transmitted using the TTI length of the second type in accordance with the PC parameter corresponding to the TTI length of the second type.