Terminal Device Synchronization Signal Alignment
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Solution Overview
Problem
Terminal devices performing device-to-device (D2D) communication with the same communication scheme as cellular communication face complexity due to separate synchronization methods for cellular and D2D communications, leading to complicated operations.
Innovation Solution
A terminal device with a detection unit for synchronizing with a base station and a control unit for controlling synchronization signals in D2D communication, using a radio frame structure identical to that for wireless communication with the base station, ensuring the timing of synchronization signals for D2D communication matches that for wireless communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate synchronization methods are prepared for cellular communication and D2D communication, then synchronization can be achieved for both communication types, but the operation of the terminal device becomes complicated
Solution Approach 1:
The patent merges the synchronization methods for cellular communication and D2D communication into a unified approach. The terminal device uses the same synchronization signal detection mechanism and radio frame structure for both communication types, eliminating the need to maintain separate synchronization procedures. This is achieved by configuring the D2D synchronization signal to follow the same timing and structure as the cellular synchronization signal, allowing the device to handle both synchronizations through a single standardized process.
Solution Approach 2:
The patent makes the synchronization mechanism universal by designing it to serve multiple functions. The same synchronization signal detection capability is used for both cellular network synchronization and D2D peer synchronization. The radio frame structure is designed to accommodate both types of communication simultaneously, allowing a single synchronization subsystem to perform multiple roles without requiring separate dedicated mechanisms for each communication type.
2Adaptability or versatility
If the same communication scheme as cellular communication is adopted in D2D communication, then communication standardization is improved, but the terminal device operation becomes complicated due to separate synchronization methods
Solution Approach 1:
The patent combines the synchronization methodologies into a single unified approach. By making the D2D synchronization signal structure and timing identical to the cellular synchronization signal, the terminal device can use the same detection algorithms and processing logic for both communication types. This merging eliminates the need to maintain separate synchronization state machines or configuration sets, thereby reducing device complexity while preserving standardization benefits.
Solution Approach 2:
The patent applies homogeneity by making the synchronization signal characteristics, radio frame structure, and detection procedures identical for both cellular and D2D communications. This homogeneous design ensures that the terminal device operates with a single standardized synchronization methodology, avoiding the complexity that would arise from heterogeneous synchronization approaches. The uniformity extends to signal timing, frequency, and structural parameters across both communication modes.
Data Source
AI summary
[Object] To simplify the operation of a terminal device for performing D2D communication in which the same communication scheme as the communication scheme of cellular communication is adopted.[Solution] Provided is a terminal device including: a detection unit configured to detect a synchronization signal for wireless communication with a base station; and a control unit configured to control transmission of a synchronization signal for inter-device communication. A radio frame used in the wireless communication with the base station and a radio frame used in the inter-device communication have a same frame structure. A timing of the synchronization signal for the inter-device communication in the same frame structure is same as a timing of the synchronization signal for the wireless communication with the base station in the same frame structure.