User Equipment D2D Cluster Head Mode Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication technologies lack efficient mechanisms for switching from Device-to-Device (D2D) communication modes to traditional cellular communication modes, particularly in scenarios where D2D broadcasting quality deteriorates, leading to high signaling overhead and incomplete information transfer.
Innovation Solution
The proposed solution enhances the role of a cluster head in user equipment (UE) to facilitate seamless switching from D2D broadcasting or multicasting to unicasting communication modes by configuring resources and modulation schemes, reducing signaling overhead and ensuring continuous information transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If D2D communication mode is used for direct terminal connection, then spectrum utilization ratio increases and transmission power decreases, but switching from D2D mode to traditional cellular mode lacks defined flow and signaling mechanism
Solution Approach 1:
The patent introduces a base station as an intermediary entity to manage and coordinate the switching process from D2D mode to traditional cellular mode. The base station receives switching requests from UEs, makes switching decisions, and provides assistance information, thereby creating a controlled and standardized switching flow that resolves the complexity issue while maintaining the efficiency benefits of D2D communication.
Solution Approach 2:
The patent implements dynamic switching capabilities where UEs can transition between D2D and traditional cellular modes based on real-time communication needs and network conditions. The switching flow includes multiple states (D2D-only mode, D2D-with-BS-assistance mode, traditional cellular mode) that can be dynamically adjusted, allowing the system to adapt to changing requirements while maintaining defined procedures for each transition.
2Productivity
If D2D broadcasting mode is used for point-to-multiple-points communication, then information can be transmitted to multiple UEs simultaneously, but switching from broadcasting mode lacks specific flow and trigger mechanism
Solution Approach 1:
The patent implements feedback mechanisms where receiving UEs can report their reception status and quality metrics to the base station. The base station uses this feedback information to determine when switching from D2D broadcasting mode to traditional cellular mode is necessary, ensuring reliable communication while maintaining the efficiency of broadcasting when conditions are favorable.
Solution Approach 2:
The base station acts as an intermediary that manages the transition from D2D broadcasting mode to traditional cellular mode. It receives broadcasting content from source UEs, manages the distribution to receiving UEs, and coordinates the switching process, thereby ensuring reliability during mode transitions while preserving the efficiency benefits of broadcasting.
3Loss of substance
If slave DUE does not maintain link connection with base station in D2D cluster, then interaction signaling decreases greatly, but switching from D2D mode to cellular mode becomes more complex
Solution Approach 1:
The patent implements preliminary actions where the base station pre-configures assistance information for potential switching scenarios. When a slave DUE needs to switch from D2D mode to cellular mode, the base station can quickly provide pre-prepared assistance information, reducing the complexity of the switching process while maintaining minimal signaling overhead during normal D2D operation.
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
Disclosed are an electronic device on a user equipment side in a wireless communication system and a wireless communication method. The electronic device of the present disclosure comprises: a communication unit, configured to implement device-to-device (D2D) communication under a cellular communication protocol with multiple user equipments, to directly send data and/or control information to the multiple user equipments; and a configuration unit, configured to configure, for a first user equipment and a second user equipment in the multiple user equipments, resources and a modulation and coding scheme (MCS) for implementing D2D communication between the first user equipment and the second user equipment, wherein the second user equipment is a candidate that the first user equipment implements D2D communication with, and the communication unit send information indicating the resources and the MCS to the first user equipment and the second user equipment.