Micro-Cell Information Transfer via UE Position Detection
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Solution Overview
Problem
In mobile communications systems, the handover between macro-base stations and micro-base stations is inefficient due to the inability to accurately and timely transfer information of neighboring micro-cells, leading to service interruptions and reduced quality of service, especially when a large number of micro-base stations are present.
Innovation Solution
A method and equipment that detect a user equipment's service connection state and position information to determine if it is within the coverage threshold range of a micro-cell adjacent to a macro-cell, allowing for precise transfer of micro-cell information to the user equipment, enabling accurate handover instructions and reducing unnecessary interference and resource waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the macro-base station broadcasts information of all neighboring micro-cells, then the user equipment can capture micro-cell signals quickly, but the number of broadcastable neighboring cells is limited to no more than 32 at most while there may be hundreds or thousands of micro-cells
Solution Approach 1:
The system performs preliminary actions by having user equipment detect and measure micro-cell signals before handover is triggered. The network side receives measurement reports containing information about neighboring micro-cells that the UE has detected, and uses this information to initiate handover procedures. This preliminary detection and reporting mechanism ensures that relevant micro-cell information is available before handover is needed, resolving the contradiction between limited broadcast capacity and the need for complete neighboring cell information.
2Reliability
If the macro-base station broadcasts information of neighboring micro-cells, then handover can be achieved, but this may cause unnecessary interference and resource waste when the user equipment is not in the coverage range
Solution Approach 1:
The system implements feedback mechanisms where user equipment continuously measures and reports neighboring micro-cell signal conditions to the network side. The network side uses this feedback information to make informed handover decisions, initiating handover only when the measurement reports indicate that handover is necessary and beneficial. This feedback-driven approach ensures high handover success ratio while avoiding unnecessary handovers that would cause interference and resource waste.
Solution Approach 2:
The system changes the parameter of neighboring cell information transmission from a static broadcast approach to a dynamic report-based approach. Instead of continuously broadcasting all neighboring micro-cell information, the system transmits information only when measurement reports indicate relevant changes in signal conditions. This parameter change optimizes the balance between handover reliability and resource efficiency by transmitting information only when necessary.
3Measurement precision
If position information is obtained and used to determine coverage threshold range, then precise micro-cell information transfer is achieved, but additional positioning operations and processing are required
Solution Approach 1:
The system uses position information as an intermediary to enable precise determination of whether user equipment is within the coverage threshold range of neighboring micro-cells. The network side obtains position information and uses it to filter and select relevant neighboring micro-cell information for transmission to the UE. This intermediary use of position data achieves precise information transfer while the network side handles the positioning processing, minimizing the complexity burden on the UE.
Data Source
AI summary
A method and corresponding equipment for transferring information of a neighboring cell in a wireless communications system are provided. The method includes obtaining position information of a user equipment (UE) when detecting that the UE is in a service connection state. It is determined whether the UE is in a coverage threshold range of a micro-cell adjacent to a current macro-cell according to the position information of the UE. Information of the micro-cell is transferred to the UE when the UE is in the coverage threshold range of the micro-cell adjacent to a current macro-cell.