D2D Communication Control for High-Speed Terminal Groups
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In device-to-device (D2D) communication within mobile communication systems, high-speed movement of terminal groups necessitates complex communication control to switch base stations, which complicates the maintenance of D2D communication.
Innovation Solution
A communication control method where the network reserves target radio resources in both the serving cell and neighboring cells, and a user terminal initiates scheduling to allocate these resources for D2D communication, reducing the need for frequent base station switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If base station switching is performed to maintain D2D communication during high-speed movement, then communication continuity is improved, but communication control complexity increases
Solution Approach 1:
The network performs preliminary action by reserving target radio resources in advance before the terminal group actually needs to switch base stations. The base station determines and reserves resources in the neighboring cell where the terminal group will move, so that when movement occurs, the terminal can immediately use the pre-reserved resources without waiting for complex real-time switching control.
Solution Approach 2:
The patent introduces an intermediary mechanism where the network (base station) acts as a mediator to manage resource reservation between cells. Instead of the terminal directly handling complex base station switching, the network mediates by reserving resources in the neighboring cell, simplifying the terminal's control burden while maintaining communication continuity during high-speed movement.
2Ease of operation
If terminal-initiated scheduling is implemented, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The patent segments the scheduling function into two parts: resource reservation (performed by the network in advance) and resource selection (performed by the terminal from reserved resources). This segmentation allows the terminal to have flexibility in selecting from pre-reserved resources without bearing the full complexity of real-time scheduling decisions, thus improving ease of operation while limiting the increase in terminal complexity to only the resource selection aspect.
Data Source
AI summary
A UE 100 is a UE 100 included in a D2D group (a terminal group) including a plurality of UEs 100 (a UE 100-1 and a UE 100-2) in a mobile communication system that supports D2D communication that is direct inter-terminal communication performed within the D2D group. The UE 100 performs UE-initiated scheduling of deciding allocation radio resources that are radio resources used for the D2D communication from among target radio resources reserved in a serving cell in which the D2D group exists and a neighboring cell adjacent to the serving cell when the D2D group is detected to be in a high-speed moving state.