Mobile Station Roaming Control via Buffer Thresholds
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Solution Overview
Problem
Roaming of mobile stations in communication networks often results in interruptions of audio and/or visual content rendering due to insufficient data buffers, leading to unpleasant user experiences.
Innovation Solution
A method that manages mobile station roaming by sending information to a roaming management device based on buffer thresholds, prohibiting roaming when data is below a certain threshold and authorizing it when data is above, to ensure continuous content rendering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If roaming is allowed freely between wireless access points, then network coverage and mobility are improved, but interruptions in audio and/or visual content rendering occur due to insufficient buffer data
Solution Approach 1:
The system performs preliminary assessment of buffer data levels before allowing roaming to occur. When the buffer contains sufficient data (above threshold), the mobile station is authorized to roam between access points. When the buffer is insufficient (below threshold), roaming is prohibited. This preliminary check ensures that roaming only occurs when it will not cause rendering interruptions.
Solution Approach 2:
The system continuously monitors the buffer data level and uses this feedback to dynamically control roaming permissions. The roaming management device receives buffer level information from the mobile station and adjusts roaming authorization accordingly - enabling roaming when buffer levels are high and disabling it when buffer levels are low, creating a closed-loop control system.
2Reliability
If roaming is prohibited to maintain continuous content rendering, then rendering reliability is improved, but mobile station mobility and network adaptability are reduced
Solution Approach 1:
The system dynamically adjusts roaming permissions based on real-time buffer conditions rather than maintaining a static roaming policy. The mobile station can switch between connected states (roaming allowed) and disconnected states (roaming prohibited) depending on whether buffer levels are above or below the threshold, making the system adaptive to changing data availability conditions.
Solution Approach 2:
The system changes the operational parameter of roaming authorization based on the buffer data level parameter. When the buffer level parameter exceeds the threshold, the roaming authorization parameter is set to enabled; when the buffer level falls below the threshold, the roaming authorization parameter is set to disabled, creating a conditional roaming regime.
3Reliability
If buffer data is accumulated to ensure sufficient data during roaming, then rendering continuity is improved, but data transmission time and latency increase
Solution Approach 1:
Rather than accumulating excessive buffer data to cover all possible scenarios, the system uses a threshold-based approach that allows partial action - permitting roaming when the buffer contains sufficient (but not excessive) data. This avoids the need to over-provision the buffer, thereby reducing unnecessary transmission delays while still ensuring rendering continuity during authorized roaming events.
Data Source
AI summary
A mobile station is configured to operate a reception of audio and/or visual content from a remote server of audio and/or visual contents connected to the network and to operate restitution of the audio and/or visual content, the content transiting, between the reception and the restitution, via a data reception buffer of the mobile station. The method includes i) triggering a sending, to a roaming management device of the network, of a first piece of information according to which roaming of the mobile station is prohibited, when a first quantity of data available in the reception buffer, lower than a first predetermined threshold, is detected, then, ii) triggering a sending, to the roaming management device, of a second piece of information according to which roaming of the mobile station is authorized, when a second quantity of data available in the reception buffer, greater than a second predetermined threshold, is detected.