V2X Resource Allocation via Inter-Base Station Signaling
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Solution Overview
Problem
In wireless communication systems, particularly in LTE-A, vehicle-to-everything (V2X) communication faces disruptions when a user equipment (UE) moves from one base station's coverage area to another, as the allocated resource sets for sidelink scheduling and data transmission are not always compatible or servable by the new base station, leading to communication failures.
Innovation Solution
A method where a base station allocates a first resource set and transmits a UE resource reserve request message to a neighbor base station, determining if the resource set can be served, and if not, allocates a new resource set, informing the source base station and UE, ensuring seamless V2X communication across coverage areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a base station allocates a set of periodically occurring resources for V2X communication, then the UE can perform data communication with high transmission rate and low delay, but when the UE moves to a neighbor BS area, the allocated resources cannot be served by the neighbor BS, leading to communication failure
Solution Approach 1:
The source base station performs preliminary actions by notifying the neighbor base station about the UE's resource allocation before the UE actually moves. This advance notification allows the neighbor BS to prepare for seamless resource takeover, ensuring communication continuity without interruption when the UE handovers to the neighbor cell.
Solution Approach 2:
The source base station acts as an intermediary by transmitting the resource allocation information to the neighbor base station through inter-base station signaling. This intermediary action enables the neighbor BS to obtain and serve the UE's allocated resources, bridging the gap between source and target cells during handover.
2Reliability
If a base station allocates resources for V2X communication, then the UE can maintain connection with the base station, but when the UE moves to a different base station's coverage area, the allocated resources are not provided by the new base station, causing V2X communication to fail
Solution Approach 1:
The resource allocation information is made universal by sharing it across multiple base stations. The neighbor base station receives and stores the resource allocation details from the source BS, enabling it to universally serve the UE with the same allocated resources regardless of which base station the UE is currently connected to, thus achieving multi-functional compatibility.
Solution Approach 2:
A feedback mechanism is established where the source base station provides resource allocation information to the neighbor base station. This feedback loop ensures that the neighbor BS is aware of and can provide the same resources, maintaining connection stability during UE mobility between cells.
3Productivity
If the base station allocates periodically occurring resources for sidelink scheduling assignment and data transmission, then the V2X communication can operate efficiently, but the UE may change base station and the allocated resources may not be served by the neighbor base station
Solution Approach 1:
The system performs preliminary action by pre-notifying the neighbor base station of the UE's periodic resource allocations before handover occurs. This advance preparation ensures that when the UE moves, the neighbor BS is already configured to provide the same periodic resources, maintaining both efficiency and reliability without requiring resource re-allocation during active communication.
Data Source
AI summary
Provided are a method for executing vehicle-to-everything (V2X) communication by a base station in a wireless communication system and a device supporting same. The base station can; allocate a first resource set; transmit to a neighboring base station a UE resource reservation request message comprising information about the allocated first resource set; receive from the neighboring base station a UE resource reservation response message as a response to the UE resource reservation request message; and transmit a newly allocated second resource set to a terminal.