Power-Based Rate Signaling for Uplink Scheduling
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Solution Overview
Problem
Current wireless communication systems face challenges in uplink scheduling due to limited knowledge of mobile device information at base stations, leading to suboptimal code rate and modulation scheme selection, and introduce time delays that cause synchronization issues.
Innovation Solution
Implementing power-based rate signaling, where both base stations and mobile devices agree on a maximum nominal power, allowing mobile devices to select code rates and modulation schemes based on this power and interference costs, thereby reducing the need for frequent information reporting and enhancing synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If base stations select code rates and modulation schemes based on information from mobile devices, then the selection can be made with mobile device knowledge, but it introduces time delays and lacks synchronization
Solution Approach 1:
The mobile device autonomously selects its own code rate and modulation scheme based on locally available information (maximum nominal power and interference cost), eliminating the need for continuous feedback loops to the base station. This self-service approach resolves the contradiction by enabling accurate code rate selection without introducing time delays from information reporting.
2Reliability
If mobile devices report detailed information to base stations, then base stations can make informed scheduling decisions, but it increases information transmission overhead
Solution Approach 1:
The patent extracts only the essential parameters needed for code rate selection (maximum nominal power and interference cost) and keeps them at the mobile device for local decision-making. By taking out the detailed information reporting requirement and retaining only critical parameters locally, the system achieves reliable scheduling decisions while minimizing information transmission overhead.
3Productivity
If base stations have complete knowledge of mobile device information, then code rate and modulation scheme selection is optimized, but it requires frequent information exchange increasing system complexity
Solution Approach 1:
The system performs preliminary action by having the mobile device pre-determine the maximum nominal power and evaluate interference costs locally before transmission. This preliminary calculation of transmission parameters at the mobile device enables optimized bandwidth utilization without requiring frequent information exchange with the base station, thereby reducing system complexity.
Data Source
AI summary
Systems and methodologies are described that facilitate utilizing power-based rate signaling for uplink scheduling in a wireless communications system. A maximum nominal power (e.g., relative maximum transmit power that may be employed on an uplink) may be known to both a base station and a mobile device. For example, the base station and the mobile device may agree upon a maximum nominal power. According to another example, signaling related to a maximum nominal power for utilization on the uplink may be provided over a downlink. Further, selection of a code rate, modulation scheme, and the like for the uplink may be effectuated by a mobile device as a function of the maximum nominal power. Moreover, such selection may be based at least in part upon an interference cost, which may be evaluated by the mobile device.