Cooperation Area Definition via Interferer Index Selection
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Solution Overview
Problem
Current methods for defining cooperation areas in communications networks are inefficient, as they either rely on network-centric approaches that limit performance gains or user-centric approaches that require extensive measurements from mobile nodes, leading to high signaling overhead and suboptimal interference handling.
Innovation Solution
A method where base stations broadcast sets of possible interferers to mobile nodes, allowing them to select and transmit an index value for defining cooperation areas, thereby minimizing interference and improving efficiency by considering the actual interference situation from the mobile node's perspective.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If user equipments define communication areas based on measurements of currently strongest interferers, then interference handling is improved, but measurement efforts and signaling overhead increase significantly
Solution Approach 1:
Base stations pre-calculate and broadcast multiple sets of possible interferers with associated index values before mobile nodes need to make decisions. This preliminary action by base stations eliminates the need for mobile nodes to perform extensive measurements to identify interferers, as the information is already prepared and available for selection based on current channel conditions
Solution Approach 2:
The patent introduces base stations as intermediaries that collect interference information from multiple sources, process it to identify relevant interferer sets, and present processed information to mobile nodes. This intermediary role reduces the measurement burden on mobile nodes while ensuring accurate interference characterization through base station processing of network-wide information
2Measurement precision
If mobile nodes perform measurements on all cell IDs to find strongest interferers, then accuracy of interference identification is improved, but signaling overhead and processing complexity increase
Solution Approach 1:
The patent extracts only the essential information needed for interference identification by having base stations pre-identify and broadcast specific sets of possible interferers with index values. Mobile nodes don't need to process all cell ID measurements but only evaluate the pre-identified sets, extracting the critical interference information while discarding redundant measurement data
Solution Approach 2:
The patent segments the large set of all possible interferers into multiple smaller, manageable sets of possible interferers, each associated with an index value. Mobile nodes can evaluate these segmented sets independently based on channel conditions, reducing the complexity of evaluating all interferers simultaneously while maintaining comprehensive interference coverage
3Device complexity
If predefined cooperation areas are used based on geographical vicinity, then system complexity is reduced, but performance gain is limited due to inability to account for actual interference conditions
Solution Approach 1:
The patent makes cooperation area definition dynamic by allowing mobile nodes to select from multiple pre-calculated interferer sets based on current channel conditions. The system transitions from static geographical definitions to dynamic selections that adapt to changing interference environments, improving performance while maintaining manageable complexity through base station pre-processing
4Measurement precision
If base stations collect and process interference information from all mobile nodes, then accuracy of cooperation area definition is improved, but network signaling overhead increases
Solution Approach 1:
The patent uses index values as simplified copies or representations of complex interferer set information. Instead of transmitting full interference measurements and calculations between base stations and mobile nodes, the system uses compact index values that reference pre-calculated interferer sets, dramatically reducing signaling overhead while preserving the ability to accurately define cooperation areas
Data Source
AI summary
The present invention refers to generating of cooperation areas in a communications network, wherein each cooperation area is defined by at least two base stations of said communications network, which are cooperating when communicating with mobile nodes in said communications network. In particular, a number of sets of possible interferers is transmitted to at least one mobile node by a base station, wherein with each set of possible interferers an index value associated to said set of possible interferers is transmitted. Then, said mobile node selects a set of possible interferers from said number of sets of possible interferers and transmits a selected index value to said base station, said selected index value being an index value associated to said selected set of possible interferers. Hereupon, a cooperation area for said mobile node is defined by said base station by use of said selected index value.