Decentralized Base Station Interference Elimination
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Solution Overview
Problem
Current methods for eliminating interference in mobile radio networks, such as centralized processing and decentralized cooperative processing, face challenges with high data transfer rates and costs, and inefficiencies in data transfer volumes and interference reconstruction.
Innovation Solution
A method where each base station determines a statistical expected value of received symbols, which is transmitted as information for interference elimination, reducing data transfer volume while maintaining reliability information for improved cooperative demodulation and decoding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If centralized processing is used for interference elimination, then interference elimination performance is improved, but data transfer volume and costs increase
Solution Approach 1:
The patent segments the centralized processing function into decentralized processing at individual base stations. Each base station independently processes received symbols using local information and exchanged minimal information, eliminating the need for massive data transfer to a central unit while maintaining interference elimination capability through distributed iterative detection
Solution Approach 2:
The patent extracts only the essential information needed for interference elimination - specifically the statistical expected values of received symbols - and exchanges this minimal data between base stations. This extraction approach avoids transmitting all raw received data while preserving the critical information needed for cooperative interference cancellation
2Measurement precision
If all received symbol information is transmitted between base stations, then interference reconstruction accuracy is improved, but data transfer volume increases
Solution Approach 1:
The patent extracts only the statistical expected values of received symbols - a condensed representation containing the essential information about signal strength and phase - for exchange between base stations. This extraction maintains interference reconstruction accuracy while reducing data transfer volume from transmitting all raw symbol data to transmitting only these compact statistical parameters
Solution Approach 2:
The patent transforms the raw received symbol data into a different parameter representation - statistical expected values - which contains the same essential information for interference elimination but in a more compact form suitable for efficient exchange over communication links
3Quantity of substance
If decentralized cooperative processing is used, then data transfer volume is reduced, but interference elimination performance deteriorates
Solution Approach 1:
The patent implements iterative feedback processing where base stations exchange statistical expected values and use this information to improve their local interference elimination. The process repeats with updated information from neighboring base stations, allowing decentralized processing to converge toward the performance of centralized processing while maintaining low data transfer volumes
Solution Approach 2:
The patent uses statistical expected values as an intermediary representation that enables cooperative interference elimination between decentralized base stations. This intermediary form of information allows base stations to share essential signal characteristics without transmitting raw data, maintaining performance while reducing data transfer requirements
Data Source
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AI summary
The invention relates to a method for eliminating interferences for an interconnected group of base stations of a mobile radio network when receiving data transmitted by mobile radio terminals in the mobile radio network, wherein a) the data are encoded at the mobile radio terminal device as symbols of a modulation alphabet, and modulated at a carrier frequency for transmitting, b) information regarding the symbols received at the base stations of the interconnected group are transmitted between the base stations by means of communication connections for eliminating interferences, and c) the base stations of the interconnected group demodulate and decode the received symbols in a cooperative and decentralized manner.