Mobile Station Active Set Management for Battery Conservation
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Solution Overview
Problem
In CDMA wireless communication systems, mobile stations consume excessive battery power due to continuous scanning for pilot signals across multiple active sectors, leading to reduced battery life as the number of active sectors increases power consumption and scanning time.
Innovation Solution
A mobile station dynamically adjusts its active-set parameters based on battery power levels, reducing the maximum number of active sectors and modifying threshold settings for sector inclusion and exclusion, such as T_ADD, T_COMP, T_DROP, and T_TDROP, to conserve battery power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mobile station maintains a larger number of active sectors in the active set, then the coverage and signal reliability are improved, but the battery power consumption increases
Solution Approach 1:
The patent applies dynamics by making the active set parameter configurable and adjustable based on operating conditions. The system dynamically modifies the active set parameter to balance between signal reliability and power consumption, allowing the network to adapt the number of active sectors according to battery status and signal conditions rather than using a fixed configuration
Solution Approach 2:
The patent implements parameter changes by modifying the active set parameter value to control the number of active sectors. By changing this parameter, the system can reduce power consumption when battery levels are low or signal conditions are good, while maintaining higher values for improved reliability when needed, thus resolving the contradiction between reliability and energy use
2Measurement precision
If the mobile station scans for pilot signals from multiple active sectors, then the signal quality selection is improved, but the scanning time and battery power consumption increase
Solution Approach 1:
The patent applies partial action by allowing the mobile station to scan only a subset of available pilot signals based on the active set parameter. Instead of scanning all possible sectors, the system scans only the necessary number determined by the parameter, reducing scanning time and power consumption while still maintaining adequate signal quality through selective scanning of the most relevant sectors
3Area of stationary object
If the mobile station increases the number of active sectors, then the communication coverage is improved, but the battery life is reduced
Solution Approach 1:
The system uses dynamics by making the active set parameter adjustable based on battery status. When battery life is充足, the parameter allows for more active sectors providing broader coverage. When battery life decreases, the parameter is reduced to conserve power, thus dynamically balancing coverage area and battery life throughout the device's operation
Data Source
AI summary
Exemplary methods and systems are disclosed herein to adjust active-set parameters based on the remaining battery life of a mobile station, generally in order to conserve battery power when the battery is low. An exemplary method involves: (a) a mobile station determining a battery-power level of the mobile station; (b) the mobile station using the determined battery-power level as a basis for setting at least one active-set parameter affecting the number of active sectors in an active set of the mobile station; and (c) the mobile station maintaining the active set according to the at least one active-set parameter. In an exemplary embodiment, the mobile station may set a maximum number of active sectors that the mobile station can include in the active set and/or parameters affecting whether a sector is included in the active set.