Radiation Pattern Signaling for Radio Access Network Coordination
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Solution Overview
Problem
Current Self-Optimizing Network (SON) mechanisms for radio access networks do not effectively coordinate coverage footprints among neighboring cells due to a lack of accurate exchange of radiation pattern information, leading to inefficiencies in mobility management, capacity optimization, and interference reduction.
Innovation Solution
Communicating radiation pattern information, including power and direction indications, between nodes in a radio access network to adapt operation and improve network performance, efficiency, and reduce interference by signaling changes in cell configuration and resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radiation pattern information is exchanged between nodes, then mobility management and capacity optimization are improved, but device complexity and information processing requirements increase
Solution Approach 1:
The radiation pattern information is segmented into discrete parameters including power levels, azimuth angles, and elevation angles. Each parameter is independently signaled and processed, allowing nodes to handle specific aspects of radiation pattern information without processing the entire dataset, thereby reducing complexity while maintaining reliability
Solution Approach 2:
Instead of having nodes continuously monitor and infer radiation patterns from complex measurements, the system inverts the approach by having transmitting nodes directly signal their radiation pattern parameters to receiving nodes. This inversion simplifies the receiving node's task and improves mobility management reliability
2Object-generated harmful factors
If radiation pattern information is exchanged between nodes, then interference reduction is achieved, but loss of information and signaling overhead increase
Solution Approach 1:
The system applies local quality by signaling radiation pattern information selectively for specific geographic directions and frequency resources rather than universally across all nodes and resources. Each node signals radiation pattern parameters relevant to its local interference environment, reducing overall signaling overhead while maintaining interference reduction effectiveness
Solution Approach 2:
The system uses partial action by signaling only the essential radiation pattern parameters (power, azimuth, elevation) needed for interference coordination rather than complete channel state information. This partial signaling achieves sufficient interference reduction without the excessive information overhead of full channel characterization
3Productivity
If nodes dynamically adjust operations based on radiation pattern information, then network performance is improved, but use of energy and processing resources increases
Solution Approach 1:
Nodes dynamically adjust operations based on periodically updated radiation pattern information rather than continuous monitoring. The system uses periodic signaling intervals and periodic optimization cycles, allowing nodes to maintain improved network performance while conserving energy by processing and adjusting parameters only at scheduled intervals rather than continuously
Data Source
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Figure 3B
AI summary
Methods are provided to operate a first node in a radio access network including a plurality of base stations. The method includes communicating radiation pattern information for a radio access network transmission. The radiation pattern information is communicated between the first node and a second node, and the radiation pattern information includes an indication of power and an indication of direction associated with the indication of power for the radio access network transmission. Related network nodes and base stations are also discussed.