Terminal Network Selection for D2D via Cross-Carrier Indication
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Solution Overview
Problem
Current network selection procedures in 3GPP may not be optimal for supporting device-to-device (D2D) communication, particularly in scenarios involving Vehicle-to-X (V2X) communications, where additional factors such as cross-carrier configuration and varying network capabilities need to be considered.
Innovation Solution
The method involves a terminal device obtaining an indication of a first carrier that provides cross-carrier configuration of a second carrier for D2D communication, and selecting a serving network from a list of authorized networks based on this information, prioritizing networks that support cross-carrier configuration for D2D communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current network selection procedures are used, then network selection is simple, but network selection is not optimal for D2D communication
Solution Approach 1:
The patent applies preliminary action by obtaining an indication of cross-carrier configuration before performing network selection. The terminal device receives configuration information from the network indicating which carriers support D2D communication, and uses this pre-obtained information to guide the network selection process, ensuring optimal network choice for D2D services.
Solution Approach 2:
The patent applies local quality by differentiating network selection based on D2D communication requirements. Instead of uniform network selection, the terminal device selectively identifies networks that specifically support D2D communication on indicated carriers, applying different selection criteria for D2D-capable networks versus general networks.
2Reliability
If networks are selected without cross-carrier configuration indication, then network selection is faster, but D2D communication support is compromised
Solution Approach 1:
The network provides cross-carrier configuration indication in advance through system information or dedicated signaling, allowing terminal devices to efficiently identify suitable networks without extensive scanning or trial connections, thus minimizing time loss while ensuring D2D support.
3Reliability
If cross-carrier configuration is implemented, then D2D communication quality is improved, but network configuration complexity increases
Solution Approach 1:
The patent uses the network as an intermediary that provides configuration indication information to terminal devices. This intermediary mechanism allows the network to coordinate cross-carrier configuration, managing the complexity centrally rather than requiring complex distributed coordination between multiple terminal devices.
4Reliability
If terminal devices select networks without cross-carrier indication, then device operation is simpler, but V2X communication reliability decreases
Solution Approach 1:
The terminal device autonomously uses the received cross-carrier configuration indication to perform informed network selection for D2D/V2X communication. The device self-determines which networks support D2D services based on the indication, without requiring complex manual configuration or external assistance, thus maintaining ease of operation while improving reliability.
Data Source
AI summary
Embodiments of the present disclosure provide methods, apparatus and computer program products for network selection. A method implemented at a terminal device comprises obtaining an indication of a first carrier that provides cross-carrier configuration of a second carrier for device to device, D2D, communication; and selecting, from a list of authorized networks, a serving network based on the second carrier and the obtained indication. With embodiments of the disclosure, support for device to device communication can be improved.