Flexible TDM ICIC Muting Pattern for LTE Interference Coordination
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Solution Overview
Problem
Current time-domain inter-cell interference coordination (ICIC) technologies in LTE-A networks face challenges in managing interference effectively, particularly in heterogeneous networks with unequal user or traffic distribution, as they rely on fixed muting patterns that do not adapt to varying interference scenarios.
Innovation Solution
A flexible muting pattern comprising a fixed and an optional part is introduced, where the optional part can be activated based on specific conditions, allowing for dynamic interference management by reducing transmission during designated subframes only when needed, thereby reducing interference and optimizing channel capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed muting patterns are used for TDM ICIC, then interference coordination is achieved, but channel capacity is wasted due to inability to adapt to varying interference scenarios
Solution Approach 1:
The muting pattern is transformed from a static fixed pattern to a dynamic flexible pattern that can be activated or deactivated based on current interference conditions. The network element receives indication information about channel conditions and dynamically adjusts whether to apply the muting pattern, allowing the system to adapt to varying interference scenarios while avoiding channel capacity waste when interference is not severe.
2Reliability
If additional muting subframes are activated to reduce interference, then interference coordination improves, but operational complexity increases
Solution Approach 1:
The system changes the parameter of muting pattern activation state based on received indication information about channel conditions. Instead of permanently activating additional muting subframes, the network element dynamically adjusts the activation parameter based on current interference levels, maintaining reliable interference coordination when needed while reducing operational complexity when interference is manageable.
3Adaptability or versatility
If flexible muting pattern with optional part is implemented, then adaptability to interference scenarios improves, but device complexity increases
Solution Approach 1:
The muting pattern is segmented into a fixed part and an optional part. The fixed part provides basic interference coordination always active, while the optional part can be selectively activated based on channel conditions. This segmentation allows the system to gain flexibility and adaptability without fully increasing device complexity, as the optional part is only activated when needed based on received indication information.
Data Source
AI summary
According to an example embodiment of this invention, a method may include by a processor, receiving a configuration of a flexible muting pattern, wherein the muting pattern comprises a fixed part and an optional part; determining to activate the optional part of the flexible muting pattern; and preparing a message indicating to a network element that the optional part of the flexible muting pattern is activated. Apparatus and computer readable media are also described.