D2D Access Control via Barring Parameters in Wireless Systems
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Solution Overview
Problem
Current wireless communication systems, particularly 3GPP LTE, lack device-to-device (D2D) specific access control mechanisms, which are essential for proximity-based services (ProSe) and public safety networks requiring direct communication and stringent reliability and security standards.
Innovation Solution
A method and apparatus for performing D2D specific access control by receiving and checking D2D specific barring parameters from a network, allowing or barring access to a cell based on these parameters, implemented in user equipment (UE) with a processor, memory, and transceiver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If D2D operation is implemented in LTE system, then proximity-based services and direct communication capability are improved, but access control mechanisms and system complexity must be increased
Solution Approach 1:
The patent segments access control into two distinct modes: Mode 1 (network-controlled access control where the base station determines resource allocation and access permission) and Mode 2 (autonomous access control where the UE independently selects resources and determines access). This segmentation allows the system to provide direct communication capability while managing complexity through differentiated control strategies for different operational scenarios.
2Reliability
If access control parameters are defined for D2D communication, then service reliability and security are improved, but signaling overhead and network load increase
Solution Approach 1:
The patent implements preliminary action by having the network pre-configure D2D access control parameters and resource pools before D2D communication occurs. The base station provides UE with predetermined resource pools, access barring parameters, and control configurations in advance, allowing UEs to perform autonomous access control without real-time network signaling during actual D2D communication, thereby reducing signaling overhead while maintaining reliability.
3Adaptability or versatility
If autonomous resource selection is enabled for D2D UEs, then resource allocation flexibility is improved, but resource collision and interference increase
Solution Approach 1:
The patent applies local quality by allowing different UEs to have different autonomous resource selection capabilities based on their specific conditions. The network can configure certain UEs with autonomous resource selection from predefined pools while maintaining network control for others, and can adjust resource pool configurations locally for different geographic areas or service types to minimize collisions while preserving flexibility.
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AI summary
A method and apparatus for performing a device-to-device (D2D) specific access control in a wireless communication system is provided. A user equipment (UE) receives D2D specific barring parameters from a network, and checks whether access to a cell is allowed according to the received D2D specific barring parameters. The D2D specific barring parameters may include a D2D specific barring factor and a D2D specific barring time.