Communication Device Power Control via Propagation Loss Feedback
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Solution Overview
Problem
Current technologies for improving system throughput in wireless LAN systems are inadequate due to significant reduction in signal interference noise ratio (SINR) and failure to effectively manage transmission power in densified environments.
Innovation Solution
A communication device that transmits a second signal to another device to request a first signal for measuring reception power or propagation loss, and controls transmission power based on the measured values, thereby optimizing communication in densified environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If transmission power is decreased to suppress interference to first communication, then interference to other networks is reduced, but SINR of second communication is significantly reduced and throughput is not improved
Solution Approach 1:
The patent implements a feedback mechanism where the base station receives propagation loss information from terminals in other networks and uses this feedback to adjust transmission power. This closed-loop control allows the system to suppress interference to other networks while maintaining adequate SINR for own network communications, resolving the contradiction between interference suppression and communication reliability.
Solution Approach 2:
The patent changes the parameter of transmission power dynamically based on propagation loss measurements from other networks. By adjusting transmission power according to actual interference conditions rather than using fixed or unilateral power control, the system achieves both interference suppression and adequate SINR maintenance.
2Productivity
If transmission power is unilaterally increased to increase SINR or transmission opportunity of own network, then transmission opportunity of own network is improved, but transmission power of entire system increases and transmission suppression is significantly increased deteriorating SINR
Solution Approach 1:
The base station uses feedback information about propagation loss from terminals in other networks to control transmission power. This prevents unilateral power increases that would cause system-wide transmission suppression, as the power control decision considers the impact on other networks and adjusts accordingly to maintain overall system balance.
Solution Approach 2:
The patent implements dynamic parameter adjustment of transmission power based on measured propagation loss from other networks. This replaces unilateral power increases with coordinated power control that adjusts transmission power to achieve adequate SINR while minimizing negative impact on other networks.
3Productivity
If signal detection threshold is increased to ignore first communication, then second communication can be performed, but in densified environments the threshold exceeds legal limits and first communication cannot be ignored
Solution Approach 1:
The patent uses feedback about propagation loss from other networks to control transmission power, which indirectly manages the effective signal detection threshold. By adjusting power based on actual conditions rather than relying on fixed high thresholds, the system maintains transmission opportunities while complying with detection threshold limits.
Solution Approach 2:
The patent changes the approach from adjusting signal detection thresholds to adjusting transmission power parameters. This power-based control achieves the same effect of enabling second communication while maintaining compliance with detection threshold regulations, even in densified environments.
Data Source
AI summary
The present technology relates to a communication device capable of improving a system throughput. Provided is a communication device including a control unit that transmits a second signal including a transmission request for a first signal for measuring reception power or propagation loss to another communication device, receives the first signal transmitted from the other communication device, measures the reception power or the propagation loss on the basis of the received first signal, and controls transmission power on the basis of the measured reception power or propagation loss. The present technology can be applied to, for example, a wireless LAN system.