Base Station Handover Management with Processing Unit Availability
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Solution Overview
Problem
Current handover procedures in cellular networks for XR services with remote rendering are delayed due to the lack of consideration for processing resources, leading to latency spikes and service degradation during mobility, as the target base station only evaluates internal and air interface resources without assessing application layer data processing capabilities.
Innovation Solution
A method for managing handover execution at a base station that includes storing neighbor cell relation information with processing unit availability, evaluating handover decisions based on this information, and extending the Radio Resource Control Measurement Report framework to consider GPU-rendering metrics, allowing for a more informed decision on handover to a target cell with sufficient processing resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If handover decisions are made based only on internal processing resources and air interface resources, then the handover procedure is simple and fast, but latency spikes and service degradation occur due to insufficient processing resources at the target base station
Solution Approach 1:
The system performs preliminary evaluation of application layer data processing capabilities at the target base station before making handover decisions. The source base station requests and receives information about the target base station's processing resources in advance, allowing the handover decision to consider both radio resources and application layer capabilities, thereby preventing service degradation without significantly increasing complexity
Solution Approach 2:
The source base station acts as an intermediary by collecting information about the target base station's processing resources and using this information to make informed handover decisions. This intermediary role allows the system to coordinate between different base stations and ensure that handovers are made to targets with sufficient processing capabilities, improving service reliability
2Loss of time
If handover evaluation includes application layer data processing capabilities, then processing resource adequacy is ensured, but the handover procedure becomes more complex and time-consuming
Solution Approach 1:
The system requests and obtains information about the target base station's processing resources in advance, before the handover decision is made. This preliminary action allows the evaluation to be completed quickly without adding significant delay to the handover procedure, while still ensuring that processing resource adequacy is verified
Solution Approach 2:
The target base station autonomously provides information about its own processing resources when requested. This self-service approach allows the source base station to quickly obtain the necessary information without complex coordination or additional signaling delays, reducing the overall handover latency while still performing thorough evaluation
Data Source
AI summary
A method, performed by a base station (104) serving a source cell, for managing handover execution. The method includes storing first NCR information for a first target cell, wherein the first NCR information comprises: i) a first cell identifier for identifying the first target cell and ii) processing unit, PU, information indicating whether or not the target cell has at least one PU available. The method further includes evaluating whether or not to initiate a handover of a user equipment, UE (102), from the source cell to the target cell, wherein the evaluation is based at least in part on the PU information for the target cell.