Multiple Reference Signal Power Control for Reliable Random Access
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Solution Overview
Problem
Existing wireless communication systems face challenges in determining optimal transmission power for multiple reference signals during random access procedures, leading to inefficiencies in signal transmission and reception.
Innovation Solution
A wireless device selects at least two reference signals for a random access procedure and transmits random access preambles based on these signals, using different transmission powers for each signal to optimize the PUSCH transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single transmission power level is used for multiple reference signals, then the device complexity is reduced, but the signal quality and transmission reliability deteriorate
Solution Approach 1:
The patent applies local quality by assigning different transmission power levels to different reference signals (SSBs or CSI-RS) based on their specific characteristics and requirements. Each reference signal can have its own power level optimized for its function, rather than using a uniform power level across all signals. This resolves the contradiction by improving transmission reliability through customized power allocation while keeping the overall system manageable through standardized power control procedures.
2Reliability
If different transmission powers are used for each reference signal, then the signal quality improves, but the device complexity and power management overhead increase
Solution Approach 1:
The patent implements parameter changes by dynamically adjusting transmission power levels for different reference signals based on measured signal quality metrics, channel conditions, and transmission requirements. The system monitors performance parameters and modifies power allocation accordingly, allowing signal quality to be optimized while the complexity is managed through automated parameter adjustment rather than manual configuration.
Solution Approach 2:
The patent employs feedback mechanisms where the transmitting device monitors the quality and performance of each reference signal and adjusts transmission power levels based on this feedback. This closed-loop approach allows the system to automatically optimize signal quality while managing power control complexity through adaptive rather than static power allocation, reducing the need for complex manual power management.
3Productivity
If transmission power is optimized for each reference signal, then the random access procedure efficiency improves, but the energy consumption increases
Solution Approach 1:
The patent applies partial or excessive action by allocating higher transmission power only to specific reference signals that require it for reliable detection, rather than uniformly increasing power for all signals. The system identifies which reference signals benefit most from enhanced power and applies optimization selectively, thereby improving random access efficiency while avoiding unnecessary energy consumption in signals that do not require additional power.
Data Source
AI summary
A wireless device selects at least two reference signals (RSs) for a random access procedure. A random access preamble is transmitted, for the random access procedure, based on the at least two RSs. A random access response, associated with the random access preamble, is received scheduling a PUSCH transmission. The wireless device transmits: one or more first repetitions, of the PUSCH transmission, with a first transmission power based on a first RS of the at least two RSs; and one or more second repetitions, of the PUSCH transmission, with a second transmission power based on a second RS of the at least two RSs.