Mobile Terminal Cell ID Comparison for Seamless Macro-Femtocell Handover
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Solution Overview
Problem
Users experience disrupted mobile phone services when moving from a macrocell to a femtocell, as the transition often requires the mobile terminal to go out of range, causing inconvenience and call interruptions.
Innovation Solution
A mobile terminal with a macrocell search unit, cell ID detection unit, cell ID storage unit, cell ID comparison unit, and control unit that compares cell IDs to facilitate smooth inter-cell movement by searching for macro and femto base stations based on reception quality thresholds, allowing seamless communication handovers without range transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a mobile terminal moves from a macrocell to a femtocell, then service coverage is improved, but communication continuity deteriorates due to required range transition
Solution Approach 1:
The mobile terminal performs preliminary actions by detecting cell IDs of macro base stations before moving to a femtocell, storing these cell IDs in advance. When moving between cells, the terminal uses the stored cell ID information to quickly identify and connect to the target femtocell, preventing communication interruption and eliminating the need to go out of range during transition.
2Device complexity
If macrocells are operated without neighboring cell information on femtocells, then network complexity is reduced, but inter-cell transition smoothness deteriorates
Solution Approach 1:
The mobile terminal performs self-service by autonomously detecting and storing cell IDs of macro base stations, and using this stored information to facilitate smooth transitions to femtocells. The terminal independently manages the cell search process using comparison between stored and detected cell IDs, eliminating the need for complex network-side coordination while ensuring smooth inter-cell transitions.
Data Source
AI summary
A mobile terminal includes: a macrocell search unit which searches for a macro base station, the mobile terminal itself communicating with a macro base station forming a macrocell or a femto base station which forms a femtocell; a cell ID detection unit which receives report information from the macro base station searched by the macrocell search unit and detects a cell ID of the macro base station; a cell ID information storage unit which stores the cell ID of the macro base station; a cell ID comparison unit which compares the cell ID stored in the cell ID information storage unit with the cell ID detected by the cell ID detection unit; a control unit controlling the macrocell search unit, the cell ID detection unit, the macrocell search unit, and the cell ID comparison unit; and a femtocell search unit which performs a cell search for the femto base station.