Terminal Synchronization Reference Cell Selection
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently acquiring synchronization for direct communication between terminals connected to different base stations, leading to difficulties in resource utilization and synchronization errors across cells.
Innovation Solution
A method and apparatus for receiving synchronization information in a wireless communication system, where a terminal acquires synchronization by receiving a synchronization reference signal from a reference cell within a cell cluster, allowing for direct communication between terminals, and optionally uses different synchronization reference cells for different resource partitions or parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a terminal uses its serving cell for synchronization in direct communication, then the synchronization process is simple, but synchronization errors occur when communicating with terminals connected to different base stations
Solution Approach 1:
The patent introduces a reference cell as an intermediary synchronization source. When a terminal needs to communicate with another terminal connected to a different base station, it acquires synchronization from the reference cell (which could be the serving cell or a neighboring cell) rather than relying solely on its own serving cell. This intermediary approach ensures both terminals use a common synchronization reference, eliminating synchronization errors while maintaining operational simplicity.
2Reliability
If different synchronization references are used for different resource partitions, then synchronization accuracy improves, but device complexity increases
Solution Approach 1:
The patent segments the direct communication resources into different resource partitions (e.g., different subframes, frequency resources, or spatial layers). Each partition is associated with a specific reference cell, allowing the terminal to use different synchronization references for different partitions. This segmentation enables high synchronization accuracy without requiring complex simultaneous processing of multiple references, as each partition can be handled independently with its designated reference.
3Device complexity
If a terminal always uses its serving cell for synchronization, then device complexity remains low, but resource utilization efficiency decreases due to synchronization errors
Solution Approach 1:
The patent implements a dynamic synchronization selection mechanism where the terminal determines which reference cell to use based on communication requirements. When communicating with terminals in the same cell, the terminal uses its serving cell for synchronization. When communicating with terminals in different cells, it dynamically switches to use the appropriate reference cell (serving or neighboring). This dynamic adaptation maintains low device complexity while significantly improving direct communication efficiency by eliminating synchronization errors.
Data Source
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AI summary
Disclosed is a method by which first user equipment receives synchronization information for direct communication between user equipment in a wireless communication system. Specifically, the method comprises: a step of receiving information related to a reference cell from a serving cell; a step of receiving a synchronous reference signal from the reference cell; and a step of acquiring the synchronization for direct communication between the user equipment on the basis of the synchronous reference signal, wherein the reference cell includes at least one of cells included in a cell cluster, and the cell cluster includes at least one among a plurality of adjacent cells adjacent to the reference cell and the serving cell.