Relay Station Initial Synchronization Using Relay-Amble
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Solution Overview
Problem
The integration of a relay station in wireless communication systems necessitates a method for efficiently acquiring initial synchronization, as existing methods do not address the unique frame structure requirements introduced by relay stations.
Innovation Solution
A method and apparatus for determining the start position of a frame using a peak of an autocorrelation signal detected from both a preamble and a relay-amble, with antenna control switches set accordingly to facilitate initial synchronization, enabling efficient synchronization acquisition both before and after synchronization is achieved.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a relay station is introduced to increase cell coverage and improve transmission performance, then the system can serve mobile stations in shadow areas and extend coverage boundaries, but the frame structure becomes different from existing systems and initial synchronization acquisition becomes complex and undefined
Solution Approach 1:
The synchronization signal is segmented into two distinct parts: a preamble for initial synchronization and a relay-amble for relay-specific synchronization. This segmentation allows the system to handle both traditional and relay-specific synchronization requirements separately, resolving the complexity introduced by the relay station's unique frame structure
Solution Approach 2:
The relay-amble acts as an intermediary signal between the base station and relay station, facilitating synchronization in the relay-specific frame structure. This intermediary element bridges the gap between existing synchronization methods and the new relay-introduced frame structure
2Ease of operation
If the mobile station uses autocorrelation signal peak detection to determine frame start position, then initial synchronization can be achieved, but the method does not account for relay-amble and fails in relay-introduced systems
Solution Approach 1:
The autocorrelation signal detection method is enhanced to serve multiple functions: it detects both the traditional preamble and the new relay-amble. This multi-functional approach allows the same detection mechanism to work in both traditional and relay-introduced systems, improving adaptability while maintaining ease of operation
Solution Approach 2:
The synchronization acquisition method becomes dynamic by adaptively selecting between preamble-based and relay-amble-based detection depending on the system configuration. This dynamic adaptation enables the method to maintain ease of operation across different system architectures
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for stable and efficient initial synchronization in wireless communication systems with relay stations, improving transmission performance and reliability by accurately determining the frame start position and controlling antenna switches based on autocorrelation signals from both preamble and relay-amble.
Implementation Method 1
determining a start position of a frame using a peak of an autocorrelation signal detected based on a preamble and a relay-amble (R-amble) received from a base station
Data Source
AI summary
A method and an apparatus for acquiring initial synchronization in a wireless communication system are provided. A relay station determines whether or not the initial synchronization is acquired, determines a start position of a frame using a peak of an autocorrelation signal detected based on a preamble and a relay-amble (R-amble) received from a base station in the case in which the initial synchronization is not acquired, and determines the start position of the frame using a peak of an autocorrelation signal detected based on the relay-amble received from the base station in the case in which the initial synchronization is acquired.