Dynamic Reference Signal Muting for Wireless Synchronization
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Solution Overview
Problem
Current LTE systems face challenges in coordinating interference-protected patterns for synchronization reference signals, leading to inefficiencies and capacity losses due to unnecessary resource muting and suboptimal signaling.
Innovation Solution
The implementation of methods and apparatuses that enable dynamic activation and deactivation of reference signal muting patterns based on synchronization needs, allowing nodes to selectively mute resources only when necessary, and coordinating muting patterns across multiple nodes to maximize interference protection while minimizing capacity losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If reference signal muting patterns are activated to reduce interference for synchronization, then synchronization signal detection accuracy is improved, but system capacity and resource utilization deteriorate
Solution Approach 1:
The patent implements dynamic activation and deactivation of reference signal muting patterns based on real-time synchronization needs. The system transitions from static muting configurations to dynamic control, where muting patterns are activated only when synchronization signals require interference protection, and deactivated when they do not, thereby optimizing the balance between synchronization accuracy and system capacity.
Solution Approach 2:
The patent employs periodic muting patterns that repeat at configured intervals rather than continuous muting. This periodic action allows the system to provide interference protection during specific synchronization periods while maintaining resource utilization during other periods, resolving the contradiction between detection accuracy and system capacity.
2Reliability
If muting patterns are activated continuously to ensure interference protection, then synchronization reliability is improved, but resource utilization and system efficiency deteriorate
Solution Approach 1:
The patent implements feedback mechanisms where base stations monitor synchronization conditions and adjust muting pattern activation accordingly. The system receives feedback about synchronization needs from neighboring base stations and activates or deactivates muting patterns based on this feedback, ensuring reliability only when needed and avoiding unnecessary resource consumption.
Solution Approach 2:
The system performs preliminary assessment of synchronization needs before activating muting patterns. Base stations evaluate whether interference protection is currently required for synchronization signals, and only activate muting patterns in advance when such protection is needed, avoiding continuous activation and associated resource waste.
3Object-affected harmful factors
If muting patterns are coordinated across multiple base stations, then interference protection effectiveness is improved, but signaling complexity and coordination overhead increase
Solution Approach 1:
The patent leverages existing multi-functional signaling mechanisms in LTE networks to carry muting pattern coordination information. Rather than creating dedicated signaling channels, the system reuses existing control signals and message formats to convey synchronization needs and muting configurations, thereby achieving multi-base station coordination without proportionally increasing signaling complexity.
Data Source
AI summary
Techniques and apparatus for enabling and disabling of muting patterns in Radio Access Network (RAN) nodes for the purpose of allowing better detection and use of reference symbols used for over-the-air synchronization. An example method, in a base station operating in a wireless communications network, includes determining that a first neighbor cell of a plurality of neighbor cells is interfering with or is likely to interfere with a signal, from a second neighbor cell, that is used for synchronization. The method further includes sending, towards the first neighbor cell, a request for activation of a reference signal muting pattern by the first neighbor cell, the request including information identifying the second neighbor cell or a stratum of the second neighbor cell.