Uplink Power Control for Multi-Band Wireless Devices
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Solution Overview
Problem
Wireless communication devices face challenges in efficiently transitioning between antenna port modes and transmission modes, leading to inconsistent behavior and increased signaling requirements between devices and base stations, which affects battery life and resource utilization.
Innovation Solution
The implementation of a method for wireless communication devices to autonomously transition between single and multiple antenna port modes, with implicit notification to the base station, using radio resource control signaling, and uplink transmission power control mechanisms to allocate power effectively across multiple frequency bands or component carriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless communication devices use explicit signaling for mode transitions, then communication reliability is improved, but signaling overhead and device complexity increase
Solution Approach 1:
The patent extracts the mode transition notification from explicit signaling and embeds it within existing uplink transmission resources. The device indicates its antenna port mode by selecting different transmission configurations (e.g., different scrambling codes, resource allocations, or power levels) that the base station can decode without requiring separate signaling messages, thereby reducing signaling overhead while maintaining reliability
Solution Approach 2:
The patent uses existing uplink transmission parameters (such as resource allocation, modulation schemes, or power control commands) as intermediaries to convey mode transition information. These parameters serve dual purposes: maintaining normal communication functionality while simultaneously encoding mode transition status, thus avoiding the need for dedicated signaling channels
2Productivity
If wireless communication devices autonomously transition between modes, then system efficiency is improved, but consistent behavior between devices and base stations deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the base station sends uplink power control commands and the device responds with transmissions that encode its current mode. The base station decodes these transmissions to verify the device's mode and sends appropriate reconfiguration commands if needed, ensuring both autonomous operation and behavioral consistency through continuous feedback loops
Solution Approach 2:
The patent establishes pre-agreed upon rules and conventions between the device and base station regarding mode transition indications. These preliminary agreements cover which transmission parameters indicate which modes, allowing the device to autonomously transition while the base station can predict and interpret the device's behavior based on pre-defined protocols
3Productivity
If transmission power is allocated across multiple frequency bands, then resource utilization is improved, but power management complexity increases
Solution Approach 1:
The patent segments the total transmission power into separate allocations for different frequency bands or component carriers. Each band is managed independently with its own power control parameters, allowing the device to optimize power distribution across multiple carriers while the base station can control each segment separately through dedicated power control commands, reducing overall power management complexity
Data Source
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AI summary
A wireless communication device is configured for performing uplink transmission power control. The wireless communication device includes a processor and instructions stored in memory. The wireless communication device performs uplink transmission power control for multiple regulated frequency bands or component carriers. The wireless communication device determines a total transmission power for at least one component carrier and allocates transmission power to at least one antenna.