Inter-eNB Coordinated Beamforming via Precoder Mapping
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Solution Overview
Problem
Current CoMP technologies are limited to intra-eNB cooperation and do not effectively enable Coordinated Beamforming (CB-CoMP) among different base stations, which is necessary for efficient communication with user terminals.
Innovation Solution
A communication control method that allows multiple cells managed by different base stations to cooperate by receiving and transmitting precoder matrix indicators, mapping information, and priority information to allocate frequency resources and perform beamforming and null steering across base stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CoMP is extended to Inter-eNB cooperation, then communication quality is improved, but system complexity increases
Solution Approach 1:
The patent segments the complex Inter-eNB CoMP system into modular functional blocks: precoder matrix indicator receiving units, mapping information generating units, and coordinated beamforming execution units. Each base station is divided into independent functional modules that can be configured and controlled separately, making the overall system more manageable despite its complexity
Solution Approach 2:
The patent introduces mapping information as an intermediary element between base stations. This mapping information serves as a standardized interface that enables coordination between different base stations without requiring direct complex interactions, thus managing system complexity while achieving improved communication quality
2Object-affected harmful factors
If CB-CoMP is implemented among different base stations, then interference suppression is improved, but information exchange complexity increases
Solution Approach 1:
The patent performs preliminary actions by having base stations pre-generate and exchange mapping information before actual coordinated beamforming operations. This mapping information contains pre-calculated precoder matrix indicators that prepare the system for efficient interference suppression without requiring complex real-time information exchange during operation
Solution Approach 2:
The patent transforms complex precoder matrix information into simplified mapping information that can be easily exchanged between base stations. By changing the parameter representation from detailed precoder matrices to compact mapping indicators, the system achieves effective interference suppression while reducing information exchange complexity
3Productivity
If multiple precoder matrix indicators are mapped to frequency resources, then resource allocation efficiency is improved, but processing complexity increases
Solution Approach 1:
The patent applies partial action by mapping only the necessary precoder matrix indicators to frequency resources rather than processing all possible combinations. This selective mapping approach improves resource allocation efficiency while avoiding the excessive processing complexity that would result from comprehensive mapping of all potential precoders
Data Source
AI summary
A communication control method used in a mobile communication system in which a plurality of cells managed by different eNBs 200 cooperate with one another to perform communication with one UE 100. The communication method comprises the steps of: in a eNB 200-1 that manages a cell #1, receiving a BCI fed back from each of a plurality of UEs 100-1 connected with the cell #1; generating, on the basis of the received BCI, mapping information that includes a plurality of BCIs with which a frequency resource is associated respectively; and transmitting the mapping information to a eNB 200-2 that manages a cell #2.