Inter-eNB Carrier Aggregation for Overlapping Macro Pico Cells
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Solution Overview
Problem
Intra-evolved Node B (eNB) carrier aggregation in mobile communication systems often fails to effectively aggregate macro cells and multiple pico cells operating in an overlapping manner, leading to inefficiencies in signal transmission and data communication.
Innovation Solution
The implementation of inter-eNB carrier aggregation across different eNBs, along with optimized transmission rules for primary and secondary serving cells, and the use of multiple frequency bands to support handover and multimedia services, addresses the inefficiencies by enabling efficient signal transmission and data communication across overlapping cell networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If intra-eNB carrier aggregation is used, then signal transmission within a single eNB is simplified, but aggregation of macro cells and multiple pico cells in overlapping manner fails
Solution Approach 1:
The patent segments the aggregation function by introducing separate primary eNB and secondary eNB entities. The primary eNB handles macro cell aggregation while the secondary eNB handles pico cell aggregation, allowing independent optimization of each aggregation function and enabling overlapping cell aggregation that single-eNB carrier aggregation cannot achieve
Solution Approach 2:
The patent introduces an intermediary mechanism through X2 interface communication between primary and secondary eNBs. This intermediary enables coordination and information exchange between different eNBs, allowing them to work together as a unified aggregation system while maintaining independent operation capabilities
2Area of stationary object
If multiple serving cells are aggregated across different eNBs, then network coverage and capacity are improved, but transmission rule determination becomes complex
Solution Approach 1:
The patent applies local quality by defining different transmission rules for different cell types. Primary serving cells use one set of transmission rules while secondary serving cells use another set, allowing each cell to operate with optimized local rules rather than requiring a single complex global rule set
Solution Approach 2:
The patent creates equipotentiality by establishing equivalent transmission rule structures for primary and secondary serving cells. Both cell types have defined transmission rules with similar logical frameworks, making the overall system easier to manage despite the presence of multiple eNBs and cell types
3Productivity
If carrier aggregation is implemented, then data transmission rate is increased, but resource allocation complexity across overlapping cells increases
Solution Approach 1:
The patent segments resource allocation by introducing separate resource pools for primary and secondary serving cells. Each eNB manages its own resource allocation independently within its designated cell type, eliminating the need for complex centralized resource management across all cells while still achieving high data transmission rates through aggregation
Data Source
AI summary
An apparatus and a method for receiving a broadcast service from a cell supporting multiple frequency bands for a frequency by a UE in a wireless communication system is provided. The method includes determining whether a supportable frequency band combination includes a frequency band of a frequency at which a particular broadcast service may be received, and if the supportable frequency band combination includes the frequency band, transmitting, to a base station, a control message including identification information corresponding to a frequency of the broadcast service desired to be received.