Cellular Network Handover via Environmental Sensors
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Solution Overview
Problem
High-frequency base stations in cellular networks face challenges with rapid signal power degradation, leading to insufficient time for seamless handover as users move out of coverage areas, resulting in poor Quality of Service (QoS) due to limited propagation distance through solid materials.
Innovation Solution
Implementing external sensors to detect changes in the propagation environment, such as door or window status, to trigger handovers to adjacent base stations before signal loss occurs, ensuring seamless connectivity by initiating handover processes before the user moves out of range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-frequency base stations are deployed to increase network capacity, then network capacity is improved, but signal propagation distance deteriorates
Solution Approach 1:
The patent segments the coverage area into multiple small cells by deploying high-frequency base stations at high density. Each base station covers a small area, and the system manages handovers between these segmented cells to maintain overall network capacity while accepting limited individual propagation distance
Solution Approach 2:
The patent introduces external sensors (door sensors, window sensors, motion sensors) as an additional dimension for detecting handover conditions. Instead of relying solely on signal strength measurements, the system uses environmental context from sensors to predict and trigger handovers proactively, compensating for the limited propagation distance of high-frequency signals
2Productivity
If high-frequency base stations are deployed with high density, then network capacity is improved, but handover coordination time deteriorates
Solution Approach 1:
The patent performs preliminary actions by using external sensors to detect environmental changes (door closing, window closing, motion detection) that predict upcoming handover scenarios. The system triggers handover preparation in advance based on sensor events before the UE actually moves out of coverage, providing extra time for handover coordination in high-frequency networks
Solution Approach 2:
The patent implements feedback mechanisms where external sensors continuously monitor environmental conditions and provide real-time information to the network. This feedback loop enables the system to adaptively trigger handovers based on actual environmental context, optimizing handover timing and coordination for high-density deployments
3Reliability
If conventional handover processes are used, then seamless connectivity is maintained in macrocells, but QoS deteriorates in high-frequency small cells with rapid signal degradation
Solution Approach 1:
The patent performs preliminary handover preparation by detecting environmental changes (door closing, window closing) that indicate impending signal loss. The system triggers handover before the UE actually moves out of coverage, ensuring seamless connectivity and maintaining QoS in high-frequency networks where signal degradation is rapid
Solution Approach 2:
The patent introduces external sensors as intermediary elements that mediate between the physical environment and the handover control system. These sensors detect environmental conditions and translate them into handover triggers, enabling more accurate and timely handover decisions that maintain connectivity and QoS
Data Source
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AI summary
A method of operating a cellular telecommunications network, the cellular telecommunications network including a first base station, a User Equipment, UE, and a remote transceiver, wherein the first base station is adapted to send a signal to the UE, the method comprising the steps of: receiving data from an external sensor indicating a first change in a propagation environment between the first base station and the UE; and, in response, the remote transceiver repeating a signal between the first base station and the UE.