Hyper Cell Configuration for Cellular Network Interference Reduction
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Solution Overview
Problem
Traditional cellular networks face challenges with excessive interference and management overhead due to dense deployments, leading to frequent handovers and complex cell ID assignment, which are not adequately addressed by existing approaches like LTE CoMP scenario 4.
Innovation Solution
The introduction of 'hyper cells' as a virtual entity for dynamic coordination of data and control signaling transmission, allowing for flexible cell ID management and optimal selection of transmit points based on network conditions, reducing interference and handovers by dynamically associating transmit points with shared cell IDs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If cells are deployed more densely to meet increasing mobile broadband demand, then network capacity is improved, but interference between neighboring cells increases and cell ID assignment becomes more difficult
Solution Approach 1:
The patent merges multiple transmit points (macro cell and remote radio heads) into a single hyper cell with a shared cell ID. This combining approach allows the network to maintain higher density for capacity while reducing interference through coordinated transmission from multiple points serving the same logical cell.
Solution Approach 2:
The hyper cell structure enables a single cell ID to serve multiple transmit points simultaneously. This multi-functionality allows the same cell identifier to be used across different geographic locations and transmit types (macro and small cells), simplifying ID assignment while maintaining network capacity.
2Productivity
If cells are deployed more densely, then network capacity is improved, but the frequency of handovers increases as UE moves between cells
Solution Approach 1:
By combining multiple transmit points into a single hyper cell with shared cell ID, the patent reduces the number of cell boundaries a UE must cross. Handovers are minimized because UEs remain within the same hyper cell even when moving between physical transmit points, reducing handover frequency and associated time loss.
3Object-affected harmful factors
If LTE CoMP scenario 4 is used with fixed sharing of cell ID between macro cell and RRHs, then interference is reduced, but handover and cell ID changing occurs when user moves away from macro cell
Solution Approach 1:
The patent extends fixed cell ID sharing to hyper cells that can dynamically include or exclude remote radio heads based on network conditions and UE location. This dynamic hyper cell structure maintains the interference reduction benefits of fixed sharing while eliminating unnecessary handovers by keeping UEs within the same hyper cell as network conditions change.
Data Source
AI summary
An apparatus for adapting hyper cells in response to changing conditions of a cellular network is disclosed. During operation, the apparatus collects data regarding network conditions of the cellular network. In accordance with the collected network condition data, the apparatus changes an association of a transmit point from a second cell ID of a second hyper cell to a first cell ID of a first hyper cell. Virtual data channels, broadcast common control channel and virtual dedicated control channel, transmit point optimization, UE-centric channel sounding and measurement, and single frequency network synchronization are also disclosed.