Load Status Information Transmission in Self Organizing Networks
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Solution Overview
Problem
In communication systems with plug-and-play local area node B deployments, there is a lack of spectral load balancing and severe intercell and co-channel interference due to the absence of a direct X2 interface, which complicates network configuration and affects existing network operations.
Innovation Solution
A base station apparatus that determines and transmits spectrum load characteristics to neighboring apparatuses via the communication physical or control layer, using a pre-determined user equipment identifier, enabling neighboring nodes to perform spectral balancing and configuration based on received load information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If plug-and-play local area node B deployments are implemented, then ease of operation and deployment speed are improved, but spectral load balancing capability deteriorates due to absence of direct X2 interface
Solution Approach 1:
The patent introduces an intermediary mechanism where load status information is transmitted via existing communication interfaces (Uu interface, Xn interface, or core network) instead of requiring a direct X2 interface. This mediator approach enables plug-and-play node Bs to share load information with neighboring nodes through available communication paths, resolving the contradiction between easy deployment and load balancing capability.
Solution Approach 2:
The patent enables existing communication interfaces to serve multiple functions: their primary function for data transmission and an additional function for load status information exchange. By making the Uu, Xn, or core network interfaces multi-functional, the system achieves spectral load balancing without requiring dedicated X2 interfaces, thus maintaining deployment simplicity while adding balancing capability.
2Productivity
If spectrum load characteristics are transmitted via physical or control layer, then spectral load balancing efficiency is improved, but device complexity increases due to additional transmission mechanisms
Solution Approach 1:
The patent reuses existing physical layer and control layer structures for their original purposes while adding load status information transmission capability. The same transmission mechanisms handle both traditional communication tasks and load information exchange, avoiding the need for separate dedicated transmission hardware or protocols, thus improving efficiency without proportionally increasing complexity.
Solution Approach 2:
The patent combines load status information transmission with existing communication protocols and physical layer structures. Instead of creating separate transmission mechanisms, the load information is merged into existing message formats and transmission channels, achieving efficient load balancing while minimizing additional complexity by leveraging already-deployed infrastructure.
3Loss of time
If pre-determined user equipment identifier is used to specify load characteristic messages, then information processing efficiency is improved, but loss of information may occur due to identifier collision or misinterpretation
Solution Approach 1:
The patent assigns specific, pre-determined user equipment identifier values to represent different types of load status information messages. Each identifier is locally optimized for its specific message type, enabling rapid message classification and processing. The identifiers are designed within a controlled range that minimizes collision probability while maintaining fast processing through direct mapping between identifier and message type.
Data Source
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AI summary
The application relates to wireless transmission of load status information for load balancing among Home Node Bs (HNB) or Local Area Node Bs (LNB) for which an X2 interface is not available. In particular, an LNB may pretend to be a user equipment with a specific predefined user equipment ID value. A neighbouring LNB which receives a data packet with this user equipment ID value knows that the data packet contains load information monitored, by a neighbouring LNB.