V2X Resource Allocation Minimization During Handover
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Solution Overview
Problem
High-speed vehicles and high vehicle density in urban environments lead to frequent handovers and cell reselections in LTE communication systems, causing communication delays that are particularly disruptive for delay-sensitive V2V and V2X communications.
Innovation Solution
A method where user equipment (UE) receives radio resource information during handovers and transmits requests for V2X communication resources, and base stations provide a reception pool with neighboring cell information, allowing for pre-allocated resources to minimize allocation delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequent handovers are performed in high-speed V2X communication scenarios, then communication coverage is maintained, but resource allocation delay increases
Solution Approach 1:
The source base station pre-allocates V2X communication resources to the UE before the handover is completed. The target base station receives this pre-allocated resource information through inter-base station communication, allowing the UE to immediately use these resources after handover without experiencing allocation delay, thus resolving the contradiction between maintaining coverage through frequent handovers and avoiding resource allocation time loss
2Reliability
If traditional handover procedures are used, then base station control is maintained, but communication continuity is disrupted
Solution Approach 1:
V2X communication resources are pre-configured and allocated before the handover execution. The target base station obtains these resource allocations through advance communication with the source base station, enabling the UE to maintain continuous V2X communication without interruption or delay during the handover process from source to target base station
Data Source
AI summary
In an aspect an apparatus receives information as part of a handover command, the information received from a serving cell and including radio resource information used in a neighboring cell for V2X communications. Additionally, the apparatus transmits, from the UE, a request for V2X communication resources as part of a handover command. In another aspect an apparatus transmits a serving cell SIB to a UE, the SIB including a reception pool. The apparatus transmits a cell ID in the serving cell SIB for a neighboring cell. The reception pool is a transmission pool for the neighboring cell. The apparatus relinquishes a communication with the UE to a base station in the neighboring cell.