Predictive Random Access Power for Mobile Devices
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Solution Overview
Problem
In wireless communication systems, mobile devices inefficiently establish connections with base stations by incrementally increasing random access transmission power, leading to unnecessary delays and interference.
Innovation Solution
Mobile devices predict a current random access transmission power based on historical transmission power information associated with mobility patterns, reducing the number of power ramp steps and interference by initiating the random access procedure at an optimized power level.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mobile devices incrementally increase random access transmission power until base station responds, then connection establishment is achieved, but connection establishment time is increased and interference to other devices is introduced
Solution Approach 1:
The patent applies preliminary action by having the mobile device predict the optimal random access transmission power before actually transmitting the random access preamble. The device uses historical transmission power information and mobility patterns to pre-determine the power level that will likely elicit a response from the base station, thereby avoiding the need for incremental power increases and reducing connection establishment time
2Reliability
If mobile devices incrementally increase random access transmission power, then connection establishment is achieved, but interference to other nearby devices is increased
Solution Approach 1:
The patent applies preliminary action by predicting the optimal transmission power level before the random access attempt. By using historical transmission power information and mobility patterns to pre-determine the appropriate power level, the device avoids transmitting at unnecessarily high power levels that would cause interference to other nearby devices while still ensuring the base station receives the signal
3Ease of operation
If mobile devices use standard transmission power determination based on downlink path loss, then transmission power is initially set, but the number of power ramp steps increases
Solution Approach 1:
The patent applies feedback by utilizing historical transmission power information that has been accumulated from previous random access attempts and mobility experiences. This feedback mechanism allows the mobile device to refine its transmission power determination beyond the standard downlink path loss calculation, leading to fewer power ramp steps and improved random access efficiency
Solution Approach 2:
The patent applies preliminary action by pre-determining the optimal transmission power level using historical data and mobility patterns before the random access procedure begins. This preliminary power determination replaces or supplements the standard downlink path loss-based calculation, reducing the number of power ramp steps needed and improving overall random access efficiency
Data Source
AI summary
Methods, systems, and devices are described for predicting a current random access transmission power detectable by a base station based on historical transmission power information. In one aspect, a mobile device may access a historical transmission power associated with a current state of the mobile device, with the historical transmission power based on mobility patterns of the mobile device. Based at least in part on the accessed historical transmission power, the mobile device may predict a current random access transmission power of the mobile device, where the predicted current random access transmission power is configured to elicit a random access response from a base station. In one aspect, the techniques described herein may reduce a number of power ramp steps taken by the mobile device during a random access procedure, reduce interference from the mobile device during the random access procedure, or both based on the predicted current random access transmission power.