Base Station Identification via Beacon Phase Shifts
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, particularly in areas with high density of buildings or compact cells, the existing base station identification techniques face challenges due to limited available PN offsets, leading to inefficient identification and potential misidentification in dense urban or indoor environments.
Innovation Solution
The use of multiple timing markers, or PN offsets, with associated phase shifts, increases the distinct identification codes for base stations without requiring new hardware, by employing existing equipment to differentiate base stations based on phase shifts and their differences, and optionally using signal strength, to enhance identification capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single PN offset is used for base station identification, then the identification system is simple, but the number of available identification codes is limited in dense urban environments
Solution Approach 1:
The identification system is segmented into multiple timing markers (first and second timing markers) within the beacon signal. Each timing marker carries a portion of the identification information, effectively dividing the identification code into segments that can be combined to create more unique identifiers.
Solution Approach 2:
The patent introduces a time dimension by using multiple timing markers at different positions within the beacon signal. This transforms the identification system from a single-code approach to a multi-position coding scheme, where the combination of timing marker positions creates additional identification capacity.
2Quantity of substance
If multiple PN offsets are used to increase identification capacity, then more base stations can be identified, but the system complexity increases
Solution Approach 1:
The beacon signal is transmitted periodically with a defined structure containing multiple timing markers. This periodic structure allows receiving devices to efficiently process and identify base stations by looking for specific patterns at expected intervals, reducing the complexity of searching through multiple possible codes.
Solution Approach 2:
The patent introduces an intermediary structure (the beacon signal with multiple timing markers) that mediates between the base station and the receiving device. This structured beacon acts as an intermediary that carries identification information in a standardized format, simplifying the identification process compared to direct multi-code transmission.
3Productivity
If the beacon signal structure is simplified, then transmission is efficient, but identification accuracy decreases in dense environments
Solution Approach 1:
Different portions of the beacon signal (different timing markers) serve different functions. The first and second timing markers provide identification information, while the overall beacon structure maintains efficiency. Each local element of the signal has an optimized quality for its specific purpose.
Solution Approach 2:
The beacon signal is constructed as a composite structure combining multiple timing markers with different characteristics. This composite signal structure leverages the strengths of each component to achieve both transmission efficiency and identification accuracy simultaneously.
Data Source
AI summary
The identification of wireless communication base stations in a region of high base station density is effected using a specific identification signal pattern transmitted by the base stations. In particular, each base station transmits a signal having a pattern with at least two time phase shifts relative to at least one time benchmark. The combination of these phase shifts allows identification of the transmitting base station. Since a plurality of phase shifts leads to a concomitantly larger number of phase shift combinations, the capacity to identify base stations is enlarged.