Synchronization Signal Domain Division in Multi-Carrier Wireless Systems
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Solution Overview
Problem
In wireless communication systems, especially those using high-frequency bands, transmitting and receiving synchronization signals efficiently is challenging due to interference and the need for high data capacity, which existing methods struggle to address effectively, particularly in systems with multiple carriers and small cell deployments.
Innovation Solution
The method involves dividing the system bandwidth into N parts along the frequency axis and M parts along the time axis, allowing synchronization signals to be transmitted and received from specific domains with different frequencies or times, with location information transmitted through radio resource control signaling, enabling efficient detection and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If synchronization signals are transmitted on multiple carriers in high-frequency bands, then data capacity is increased, but interference between synchronization signals increases and detection complexity increases
Solution Approach 1:
The system bandwidth is divided into multiple domains along the frequency axis (N parts) and time axis (M parts). Synchronization signals on different carriers are assigned to different domains, specifically using domains with different frequencies or different times. This segmentation separates the synchronization signals in the time-frequency resource space, reducing mutual interference while maintaining high data capacity through multi-carrier transmission.
2Productivity
If synchronization signals are transmitted on multiple carriers, then system bandwidth utilization is improved, but detection complexity and acquisition time increase
Solution Approach 1:
Location information indicating the specific domains where synchronization signals are transmitted is pre-transmitted to terminals through radio resource control (RRC) signaling. This preliminary provision of domain location information allows terminals to directly search for synchronization signals in the indicated domains without performing exhaustive searches across all possible domains, thereby reducing detection complexity and acquisition time while maintaining efficient bandwidth utilization.
3Productivity
If the whole system bandwidth is divided into multiple domains, then synchronization signal transmission efficiency is improved, but signaling overhead increases
Solution Approach 1:
The domain location information is transmitted selectively through RRC signaling only when needed for synchronization signal transmission. The signaling provides precise domain-level granularity information (which specific frequency and time domains are used) rather than blanket system-wide information. This localized, on-demand signaling approach minimizes overhead while maximizing transmission efficiency by providing exactly the information needed for efficient synchronization signal detection.
Data Source
AI summary
The present invention relates to a wireless communication system. The method whereby a terminal receives synchronizing signals in a wireless communication system supporting multi-carriers, according to one embodiment of the present invention, comprises the steps of: receiving location information on domains, from which the synchronizing signals are transmitted, among the domains resulting from the division of the whole system bandwidth into N parts along a frequency axis and into M parts along a time axis (wherein N and M are natural numbers); and receiving the synchronizing signals from the domains corresponding to the location information, wherein the respective synchronizing signals transmitted to multiple carriers can be transmitted from domains having a different frequency and/or time.