Wireless Handover Load Balancing via Signal Power and Base Station Load
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Solution Overview
Problem
In wireless communication systems with high densities of base stations, frequent handovers and cell-reselections lead to increased load on base stations, causing temporary disruptions and interference due to large report messages.
Innovation Solution
An electronic device measures signal power and load information from nearby base stations to select candidate base stations for handover or cell-reselection, reducing the size of report messages and optimizing load balance by transmitting information probabilistically based on load states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the electronic device reports signal power information from all nearby base stations to the serving base station, then the handover decision can be made with complete information, but the report message size increases causing interference and power consumption
Solution Approach 1:
The patent extracts only the necessary information (signal power of candidate base stations) from the complete set of nearby base station information, and selectively reports only to the serving base station. This reduces the report message size while maintaining sufficient information for handover decisions, thereby reducing interference and power consumption.
Solution Approach 2:
The patent segments the base station information into two categories: candidate base stations (for handover) and non-candidate base stations (not for handover). By segmenting and reporting only the relevant candidate information, the system reduces the overall report message size while preserving the necessary decision-making information.
2Reliability
If the electronic device frequently performs cell-reselection and handovers to optimize signal quality, then communication quality improves, but the base station load increases causing temporary disruptions
Solution Approach 1:
The patent implements feedback mechanisms where the electronic device reports signal power information to the serving base station, which then makes informed handover decisions. This feedback loop ensures that handovers are performed only when necessary and beneficial, optimizing communication quality while preventing excessive handovers that would increase base station load.
Solution Approach 2:
The patent dynamically adjusts handover behavior based on real-time signal conditions and base station load states. The electronic device and base station collaborate to determine optimal handover timing, making the system adaptive to changing conditions rather than performing frequent fixed-frequency handovers, thereby reducing unnecessary load on base stations.
3Measurement precision
If the electronic device measures and reports signal power from all nearby base stations, then handover decisions are well-informed, but power consumption for transmitting report messages increases
Solution Approach 1:
The patent extracts and reports only the signal power information of candidate base stations (those suitable for handover) rather than all nearby base stations. This selective extraction maintains sufficient measurement precision for handover decisions while significantly reducing the amount of data transmitted, thereby lowering power consumption.
Solution Approach 2:
The patent applies partial action by measuring and reporting only the necessary subset of base station information (candidate base stations) rather than all available information. This partial measurement approach provides sufficient precision for handover decisions while minimizing the energy consumption associated with transmitting complete information.
Data Source
AI summary
Disclosed are a method and an apparatus for providing a handover of an electronic device and reselection of a base station (cell) in a wireless communication system, considering load of the base station. A method for performing handovers in an electronic device of a wireless communication system includes: when a handover is required, measuring power of signals received from a serving base station and nearby base stations, and obtaining load information of the serving base station and the nearby base stations; selecting the first candidate base stations capable of performing a handover, using the measured power of the received signals; selecting the second candidate base stations capable of performing a handover, based on the load information of the first candidate base stations; and transmitting information on the power of signals received from the selected second candidate base stations and a request message for a handover to the serving base station.