Adaptive WLAN Power Control in Multi-Radio Devices
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication devices with multiple radios, such as cellular and WLAN radios, often penalize WLAN radios by transmitting at overly conservative power levels due to assuming maximum cellular radio transmission power, leading to reduced performance and data throughput.
Innovation Solution
Implementing adaptive transmission power selection for WLAN radios based on the actual transmission power characteristics of cellular radios, allowing WLAN radios to dynamically adjust their power within total transmission power limits, rather than assuming maximum cellular power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the device assumes maximum transmission power for the cellular radio to ensure compliance with total transmission power limits, then regulatory compliance is maintained, but the WLAN radio transmits at overly conservative power levels reducing its performance
Solution Approach 1:
The patent implements dynamic transmission power adjustment where the WLAN radio's transmission power is not fixed at a conservative level but is dynamically adjusted based on the actual measured transmission power of the cellular radio. This allows the system to maintain regulatory compliance while optimizing WLAN performance in real-time according to actual operating conditions.
Solution Approach 2:
The system employs feedback mechanisms where the WLAN radio monitors the actual transmission power of the cellular radio and adjusts its own transmission power accordingly. This closed-loop feedback approach replaces the open-loop conservative assumption with adaptive control that responds to actual system state, resolving the contradiction between compliance and performance.
2Productivity
If the WLAN radio transmits at higher power to improve its transmission range and data throughput, then WLAN performance is enhanced, but the total transmission power may exceed regulatory limits when the cellular radio is also transmitting
Solution Approach 1:
The patent changes the transmission power parameter of the WLAN radio dynamically based on the actual transmission power parameter of the cellular radio. By continuously adjusting this parameter according to real-time conditions rather than using a fixed conservative value, the system achieves higher WLAN throughput while ensuring the combined transmission power remains within regulatory limits.
Data Source
AI summary
A method for controlling transmission power in accordance with a total transmission power limit in a multi-radio wireless communication device including a master radio and a slave radio is provided. The method can include the wireless communication device determining, at the master radio, a transmission power of the master radio. The method can further include the wireless communication device providing information indicative of the transmission power of the master radio from the master radio to the slave radio. The method can additionally include determining, at the slave radio, an allowable transmission power for the slave radio. A sum of the allowable transmission power and the transmission power of the master radio may not exceed the total transmission power limit.