Network-Managed D2D Control Plane for LTE Resource Allocation
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Solution Overview
Problem
Current D2D communication technologies face challenges in managing device-to-device communications within LTE networks, particularly in ensuring efficient resource allocation, security, and scalability, due to minimal network involvement and lack of oversight in device-centric approaches.
Innovation Solution
A network-managed approach is implemented, where a base station receives group information from a proximity server to update UE lists and resource allocations, enabling efficient D2D communication by managing resource allocation and switching between D2D and cellular modes based on link quality and UE capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a device-centric approach with minimal network involvement is used for D2D communication, then device autonomy and simplicity are improved, but resource allocation efficiency and network security deteriorate
Solution Approach 1:
The base station acts as an intermediary that receives D2D communication requests from user equipment, allocates radio resources, and provides control information without directly participating in the data transmission. This mediator approach maintains device autonomy while ensuring efficient resource allocation through centralized coordination.
2Device complexity
If a device-centric approach with minimal network involvement is used for D2D communication, then implementation simplicity is improved, but network security and resource management deteriorate
Solution Approach 1:
The base station serves as a security intermediary that authenticates D2D communication requests, manages radio resource allocation, and monitors communication quality. This approach keeps the D2D implementation simple at the device level while centralizing security and resource management functions at the network level.
3Productivity
If network-managed resource allocation is implemented for D2D communication, then resource allocation efficiency and network oversight are improved, but system complexity and signaling overhead increase
Solution Approach 1:
The patent extracts the complex resource allocation and security management functions from the user equipment and concentrates them in the base station. The UE only needs to send simple requests and receive allocations, while the base station handles the complex tasks of resource management, authentication, and coordination with proximity servers.
4Productivity
If base station coordination is used for D2D communication, then resource management and interference coordination are improved, but signaling overhead and network load increase
Solution Approach 1:
The base station continuously monitors D2D communication quality and dynamically adjusts resource allocations based on channel conditions and network load. This continuous coordination ensures efficient resource management and interference coordination while optimizing the balance between signaling overhead and communication performance.
Data Source
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AI summary
System and method embodiments are provided for controlling and managing in-network device-to-device (D2D) communications. In an embodiment, a method for a UE performing device-to-device (D2D) communication includes generating a D2D buffer status report (BSR) for a D2D communication link between the UE and a second UE that provides information related to an amount of D2D data available for transmission, wherein the D2D BSR comprises a D2D BSR logical channel identifier (LCID); transmitting the D2D BSR in a control element; receiving, a resource allocation for the D2D link; and transmitting D2D data over the allocated resource.