D2D Operation in Non-Activated Carriers for Public Safety
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Solution Overview
Problem
Current wireless communication systems, particularly 3GPP LTE, lack the capability for device-to-device (D2D) operation in non-activated carriers, which is essential for proximity-based services like public safety networks that require direct communication and stringent reliability and security, especially when cellular coverage is unavailable.
Innovation Solution
A method and apparatus enabling D2D operation in a non-activated carrier by providing necessary control signals and higher-layer signaling, allowing time/frequency synchronization, and supporting D2D operations in conjunction with cell on/off operations, even in unlicensed carriers, using a user equipment (UE) with a processor, memory, and transceiver to perform D2D operations without an activated serving cell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If D2D operation is performed in an activated carrier, then the communication can be established, but the service availability is limited when cellular coverage is unavailable
Solution Approach 1:
The patent enables dynamic D2D operation by allowing the UE to perform D2D communication in non-activated carriers. The system dynamically activates D2D functionality in carriers that are not traditionally activated for standard cellular communication, thereby improving service availability and adaptability in scenarios where cellular coverage is unavailable or insufficient.
2Reliability
If D2D operation is enabled in non-activated carrier, then service availability is improved, but control signal and synchronization mechanisms become more complex
Solution Approach 1:
The patent introduces an intermediary mechanism where the network side provides necessary control signals and higher-layer signaling to enable D2D operation in non-activated carriers. This intermediary approach allows the system to manage the complexity of control signals and synchronization by leveraging existing network infrastructure while enabling new D2D functionality in previously inactive carriers.
Data Source
AI summary
A method and apparatus for performing device-to-device (D2D) operation in a wireless communication system is provided. A user equipment (UE) receives a signal for D2D operation, and performs the D2D operation in a non-activated carrier.