Base Station Handover Resource Pool Forwarding for V2X
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Solution Overview
Problem
In current mobile communication systems, when a radio terminal needs to perform a handover, it must suspend proximity-based services until it receives resource pool and synchronization setting information from the target cell, leading to potential service disruptions and increased handover times.
Innovation Solution
The system includes a base station and user equipment that manage and transmit messages for handover, including resource pool and synchronization information, allowing the user equipment to initiate handover and resume proximity-based services using the new resource pool and synchronization settings before completing the handover process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the user equipment suspends proximity-based services during handover to receive resource pool and synchronization information from the target cell, then the handover process is completed reliably, but the service disruption time increases
Solution Approach 1:
The base station forwards the resource pool information and synchronization information of the target cell to the user equipment before the handover is actually executed. This preliminary provision of critical handover parameters allows the user equipment to prepare for seamless service continuation, reducing the service suspension period while ensuring reliable handover completion.
2Stability of the object's composition
If the user equipment waits to receive resource pool information from the target cell before resuming proximity-based services, then service continuity is maintained, but the handover time increases
Solution Approach 1:
The base station performs the action of forwarding target cell resource pool information and synchronization information to the user equipment in advance, before the handover execution point. This preliminary action enables the user equipment to resume proximity-based services immediately upon handover completion without waiting for target cell information, thus maintaining service continuity while shortening handover duration.
3Loss of time
If the base station forwards resource pool and synchronization information to the user equipment during handover, then the service suspension period is reduced, but the signaling overhead increases
Solution Approach 1:
The patent extracts only the essential and critical information elements (resource pool information and synchronization information) from the complete target cell configuration and forwards only these specific parameters to the user equipment. This selective extraction reduces the signaling overhead compared to forwarding all target cell system information, while still achieving the goal of reducing service suspension period.
Data Source
AI summary
A user equipment and method of a user equipment transmit, to a first cell, information requesting radio resource for V2X sidelink communication, and receive from the first cell, a message for a handover from the first cell to a second cell. The message includes information indicating a resource pool used for transmitting the V2X sidelink communication during performing the handover, and synchronization information indicating synchronization configuration used for transmitting synchronization in the V2X sidelink communication during performing the handover. A base station receives the information requesting radio resource for V2X sidelink communication and transmits to the user equipment, a message for a handover from a first cell to a second cell. The message transmitted by the base station includes information indicating a resource pool used for transmitting the V2X sidelink communication, and synchronization information indicating synchronization configuration used for transmitting synchronization in the V2X sidelink communication.