D2D Subframe Configuration via Signalling
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Solution Overview
Problem
Current cellular communication methods are inefficient for close-range user equipment (UE) data transmission, as they consume two radio spectrum resources, whereas Device-to-Device (D2D) communication can save resources and improve spectral efficiency, but require effective sub-frame configuration indication to optimize resource utilization.
Innovation Solution
A method and system for indicating sub-frame configuration in D2D communication using high layer and physical layer signalling, allowing flexible configuration of D2D sub-frames, transmitting sub-frames, and special sub-frames to improve resource utilization and data transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cellular communication method is used for close-range UE data transmission, then reliability is maintained through base station routing, but radio spectrum resources are wasted consuming two resources for one data transmission
Solution Approach 1:
The patent segments the communication resources by dividing sub-frames into different types (D2D sub-frames, MBSFN sub-frames, non-MBSFN sub-frames) and assigns different transmission modes to each segment. This allows D2D communication to use specific segmented resources while cellular communication uses others, enabling simultaneous operations with optimized resource allocation and reducing overall spectrum waste.
2Quantity of substance
If D2D communication mode is adopted for close-range UE, then radio spectrum resources are saved and spectral efficiency is improved, but effective sub-frame configuration indication is required to optimize resource utilization
Solution Approach 1:
The patent implements dynamic sub-frame configuration where the eNodeB can flexibly assign different sub-frames as D2D sub-frames, MBSFN sub-frames, or non-MBSFN sub-frames based on real-time network conditions and service requirements. This dynamic allocation allows the system to adapt resource configuration to changing demands, optimizing resource utilization while managing complexity through centralized control.
Solution Approach 2:
The patent changes the configuration parameters of sub-frames to optimize D2D communication. By adjusting parameters such as sub-frame type, MBSFN configuration, and resource allocation patterns, the system can adapt to different service requirements and optimize resource utilization for D2D transmissions without requiring complex device-side configuration management.
3Productivity
If dedicated sub-frames are divided for D2D communication, then resource utilization is improved, but interference coordination between different communication modes becomes challenging
Solution Approach 1:
The patent segments time resources into different sub-frame types (D2D sub-frames, MBSFN sub-frames, non-MBSFN sub-frames) and assigns different transmission modes to each segment. This segmentation allows D2D communication to use specific segmented resources while cellular communication uses others, enabling simultaneous operations with optimized resource allocation and reduced interference between modes.
Solution Approach 2:
The eNodeB acts as an intermediary that coordinates resource allocation and interference management between D2D and cellular communication modes. By centrally controlling sub-frame configuration and resource assignment, the eNodeB mediates potential interference conflicts and optimizes overall system performance.
Data Source
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AI summary
Disclosed are a method and system for indicating sub-frame configuration in D2D communication. The method includes that a configured D2D transmitting sub-frame and/or D2D receiving sub-frame and/or D2D special sub-frame are indicated through high layer signalling and/or physical layer signalling, wherein the D2D transmitting sub-frame is for carrying and transmitting D2D communication data, the D2D receiving sub-frame is for receiving D2D communication data and the D2D special sub-frame is for carrying, transmitting and receiving D2D communication data; and the D2D transmitting sub-frame, receiving sub-frame and special sub-frame are system uplink sub-frames.