Cell-Selective Network Access via Preamble Detection
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Solution Overview
Problem
Existing wireless network technologies do not effectively allow terminal devices to differentiate between femto cells and macro cells for optimal network access, leading to suboptimal coverage and pricing benefits.
Innovation Solution
A method and apparatus that enable terminal devices to selectively access a cell type by detecting and distinguishing between different cell types through preamble or header signals, allowing for network access based on signal strength and preferences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If terminal devices access cells without cell type differentiation, then network access is simplified, but coverage optimization and pricing benefits are lost
Solution Approach 1:
The patent segments the cellular network into distinct cell types (femto cells and macro cells) with different coverage characteristics and pricing models. Terminal devices are enabled to detect and differentiate between these cell types using preamble or header signals, allowing them to selectively access the appropriate cell type based on their needs for coverage optimization or pricing benefits.
2Reliability
If terminal devices selectively access different cell types, then coverage and pricing benefits are improved, but device complexity increases
Solution Approach 1:
The patent implements preliminary action by embedding cell type identification information in the preamble or header signals that are transmitted before the main data communication. Terminal devices can detect the cell type early in the cell selection process through these preliminary signals, enabling informed access decisions without requiring complex post-detection analysis or additional signaling overhead.
3Adaptability or versatility
If cell type differentiation is implemented through preamble signals, then access selection is improved, but signal processing complexity increases
Solution Approach 1:
The patent applies local quality by embedding cell type identification information specifically in the preamble or header portion of the signal, which has distinct structural characteristics from the main data payload. This localized approach allows terminal devices to detect cell type using simplified processing targeted at the specific preamble/header structure, rather than requiring complex analysis of the entire signal.
Data Source
AI summary
The present invention relates to methods and apparatuses for providing selective network access, wherein a cell type indication is provided based on at least one of a preamble and a header portion of a broadcast signal. At the receiving end, it is checked based on at least one of the preamble and the header portion, whether broadcast signals are received from different first and second cell types. The first cell type is selected for network access, if both broadcast signals from the first and second cell types are received with sufficient strength.