Signaling Duplex Capability and KPI Metrics for Cell Selection
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Solution Overview
Problem
User equipment (UE) may select a cell during the cell selection process without being aware of the duplex capability and associated performance metrics of the cell, leading to potential increased latency, decreased throughput, and degraded link quality.
Innovation Solution
The proposed solution involves signaling the duplex capability of a network entity, including indications of half duplex (HD) or full duplex (FD) operation, and key performance indicator (KPI) metrics such as user perceived throughput, turnaround latency, and coverage metrics, to the UE during the cell selection process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UE performs cell selection without knowing duplex capability and performance metrics, then the cell selection process is simple, but the latency increases and throughput decreases
Solution Approach 1:
The network entity broadcasts duplex capability indicators and KPI metrics (such as latency, throughput, coverage) before the UE performs cell selection. This preliminary provision of information enables the UE to make informed decisions during cell selection, selecting cells with better performance characteristics without adding complexity to the selection process itself.
Solution Approach 2:
The patent introduces an intermediary information layer (duplex capability indicators and KPI metrics) that mediates between the network entity and the UE. These indicators act as a bridge, conveying performance information from the network to the UE without requiring complex direct negotiation or measurement procedures during cell selection.
2Loss of time
If the UE selects cells based on duplex capability and KPI metrics, then latency is reduced and throughput is increased, but the device complexity increases
Solution Approach 1:
By providing duplex capability and KPI information in advance through broadcasting, the network enables UEs to perform simple comparisons during cell selection rather than complex measurements and evaluations. The UE only needs to read the provided indicators and select the best cell, significantly reducing computational complexity while achieving lower latency.
Solution Approach 2:
The patent transforms complex performance evaluation into simple parameter comparison. Instead of requiring UEs to perform complex measurements of latency, throughput, and coverage, the network converts these into standardized KPI metrics and duplex capability indicators that UEs can directly compare, simplifying the selection process while maintaining performance optimization.
3Productivity
If the network entities operate in full duplex mode, then throughput is increased, but the complexity of managing different duplex modes increases
Solution Approach 1:
The patent introduces duplex capability indicators as intermediary signals that convey the operational mode (HD or FD) and specific FD parameters (SDM or FDM) of network entities. These indicators serve as a standardized communication mechanism between network entities and UEs, simplifying the management of diverse duplex modes by translating them into uniform information that can be easily processed and compared during cell selection.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. Network entities that are capable of full duplex (FD) communication may exhibit reduced latency and increased throughput, among other performance benefits, as compared to half duplex (HD) network entities. Accordingly, in some aspects, a network entity may signal to a user equipment (UE) a duplex capability of a cell and/or one or more KPI metrics associated with the duplex capability of the cell during a cell selection process. The UE may perform the cell selection process based at least in part on the duplex capability of and/or the at least one KPI metric, thereby utilizing performance benefits of FD cells or the like. Numerous other aspects are described.