Home Base Station Interference Control via Low Duty Mode
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Solution Overview
Problem
In cellular systems, home base station (HBS) control signals interfere with macro/micro cell base station (MBS) signals received by mobile stations (MS), causing interference that hampers correct signal reception.
Innovation Solution
The HBS enters a low duty mode (LDM) upon receiving an interference mitigation request from the MS, with a predetermined activating-deactivating pattern and duration, allowing it to adjust settings based on ongoing interference to minimize interference and ensure correct MBS signal reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the HBS operates in normal mode continuously, then the HBS can provide uninterrupted service to its subscribers, but it causes severe interference to MBS control signals received by m-MS
Solution Approach 1:
The HBS enters low duty mode periodically with activating-deactivating patterns, where the HBS alternates between normal operation and reduced operation states. This periodic action allows the HBS to provide service intermittently while reducing interference to MBS signals during deactivating periods, resolving the contradiction between service continuity and interference mitigation.
2Object-affected harmful factors
If the HBS enters low duty mode to reduce interference, then MBS signal reception is improved, but the HBS service availability to its subscribers is reduced
Solution Approach 1:
The HBS dynamically adjusts its operation mode between normal mode and low duty mode based on detected interference conditions and received IM requests. This dynamic adaptation allows the HBS to optimize the balance between providing service to its subscribers and mitigating interference to MBS signals, rather than operating in a fixed state.
Solution Approach 2:
The HBS changes operational parameters including duty cycle, activating-deactivating pattern, and LDM duration when transitioning between normal mode and low duty mode. These parameter changes enable the HBS to control the timing and duration of interference reduction while maintaining service availability through periodic reactivation.
3Stability of the object's composition
If the HBS uses a fixed LDM duration and activating-deactivating pattern, then the interference mitigation is predictable, but it cannot adapt to changing interference conditions or user needs
Solution Approach 1:
The HBS monitors interference conditions and receives IM requests from m-MS to determine whether to enter or continue low duty mode. This feedback mechanism allows the HBS to adapt its operation dynamically based on actual interference conditions and user needs, while maintaining predictable behavior through structured activating-deactivating patterns and LDM duration settings.
Data Source
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AI summary
A signal interference handling method adapted to a home base station (HBS) of a cellular system, a HBS and a mobile station using the same method are provided. The HBS receives an IM request. After the HBS receives an IM request, the HBS enters a LDM, where the IM request is sent by a macro/micro cell base station (MBS)-served mobile station (m-MS) of the cellular system when the m-MS detects there is mutual interference.