Wireless Signal Repeater Activation for Data Rate Optimization
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Solution Overview
Problem
In wireless communication systems operating according to the IS-856 standard, data transmission rates are limited by signal-to-noise ratios, which are affected by pilot signal interference and distance from the base station, leading to reduced data rates, especially in overlapping sector areas and as mobile stations move between coverage areas.
Innovation Solution
Implementing a method that determines the location of a mobile station and activates or deactivates an inactive signal repeater strategically located between base stations to enhance data transmission rates by improving signal strength and reducing noise interference, thereby adjusting data rates dynamically based on the mobile station's position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mobile station operates on a sector with overlapping pilot signals from neighboring sectors, then the mobile station can maintain connection coverage, but the C/I ratio decreases due to pilot pollution interference, resulting in reduced data transmission rates
Solution Approach 1:
The patent introduces a location determination mechanism as an intermediary that identifies when a mobile station is in an overlapping coverage area. Based on this information, the system selectively adjusts pilot signal transmission or handoff decisions, mediating between the need for coverage and the desire for high data rates by preventing harmful interference in specific scenarios
Solution Approach 2:
The patent implements dynamic adjustment of sector power levels or pilot signal transmission based on real-time location information. When a mobile station is detected to be in an overlapping area, the system dynamically modifies transmission parameters to reduce pilot pollution, thereby maintaining coverage while improving C/I ratio and data transmission rates
2Area of stationary object
If the mobile station moves away from the serving base station, then the coverage area is extended, but the pilot signal becomes more attenuated, reducing the C/I ratio and data transmission rates
Solution Approach 1:
The patent implements dynamic power adjustment where the serving base station increases its pilot signal and data signal transmission power when the mobile station is detected to be at a greater distance. This dynamic compensation maintains the C/I ratio and data transmission rates even as the mobile station moves through the coverage area
Solution Approach 2:
The patent uses location determination to predict when a mobile station will enter regions of high path loss. The base station proactively adjusts transmission power before the C/I ratio degrades, maintaining optimal data rates throughout the coverage area
3Productivity
If the base station transmits at higher power to compensate for distance attenuation, then the data transmission rate is maintained, but the energy consumption and interference to other sectors increases
Solution Approach 1:
The patent applies localized power adjustment where the base station increases transmission power only for mobile stations in specific locations (e.g., at the edge of coverage areas or in fading regions) rather than uniformly increasing power for all users. This maintains data rates for affected users while minimizing overall energy consumption and interference to other sectors
Data Source
AI summary
Methods and systems are disclosed for improving data transmission rates in a wireless communication system. An example method may be implemented in a wireless communication system including a plurality of base stations defining a plurality of wireless coverage areas in which a mobile station can engage in radio frequency (RF) communication with the base stations where the method includes determining a location of the mobile station. Based on the determined location of the mobile station, the method further includes determining whether activating an inactive signal repeater would increase a rate at which data is able to be communicated from the base stations to the mobile station. In the event that that it is determined that activating the signal repeater would increase the rate at which data is able to be communicated, the method still further includes activating the signal repeater.