Dynamic Network Priority Adjustment for 5G LTE Connectivity
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Solution Overview
Problem
The conventional implementation of assigning higher priority to 5G NR over LTE in multi-mode UEs results in poor performance due to sparse 5G NR coverage and lack of carrier aggregation support in 5G NR, leading to connectivity issues and reduced data throughput.
Innovation Solution
The UE dynamically adjusts network priority based on signal quality metrics and availability of carrier aggregation, estimating expected data throughput for both LTE and 5G NR networks, and prioritizing LTE when 5G NR coverage is weak, thereby ensuring stable connections and optimal data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If higher priority is assigned to 5G NR over LTE in multi-mode UEs, then data throughput is improved, but connectivity reliability deteriorates due to sparse 5G NR coverage
Solution Approach 1:
The patent implements dynamic priority adjustment where the UE monitors 5G NR signal quality metrics (RSRP, RSRQ, SINR) and dynamically switches between 5G NR and LTE based on measured conditions. When 5G NR signal quality falls below thresholds, the UE automatically prioritizes LTE to maintain connectivity, and switches back to 5G NR when signal quality improves, making the network selection adaptive rather than static
Solution Approach 2:
The patent changes the network selection parameters by introducing signal quality thresholds (RSRP threshold, RSRQ threshold, SINR threshold) and carrier aggregation availability as decision criteria. The UE evaluates these parameters continuously and adjusts network priority based on whether thresholds are met, transforming the network selection from a fixed priority model to a parameter-driven dynamic model
2Quantity of substance
If 5G NR is prioritized over LTE, then bandwidth capability is improved, but network coverage availability deteriorates due to sparse 5G deployment
Solution Approach 1:
The patent makes the UE multi-functional by enabling it to operate on both 5G NR and LTE networks with dynamic selection capability. The UE can universally access either network type based on conditions, utilizing 5G NR when available for high bandwidth and switching to LTE when 5G coverage is unavailable, making the system adaptable to different network environments
3Reliability
If dynamic priority adjustment based on signal quality is implemented, then connectivity reliability is improved, but device complexity increases
Solution Approach 1:
The patent implements self-service by enabling the UE to autonomously monitor its own signal quality metrics, evaluate threshold conditions, and automatically switch between 5G NR and LTE networks without external intervention. The device performs self-diagnosis of network conditions and self-adjusts its network selection, eliminating the need for complex external control mechanisms
4Productivity
If carrier aggregation availability is considered in network selection, then data throughput is improved, but measurement and detection difficulty increases
Solution Approach 1:
The patent applies preliminary action by having the UE check carrier aggregation availability in advance as a decision criterion before finalizing network selection. The device evaluates whether carrier aggregation is available on 5G NR frequencies beforehand, and uses this information to determine whether to prioritize 5G NR or fall back to LTE, making the detection process systematic and integrated into the network selection workflow
Data Source
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AI summary
A user equipment (UE) is configured to be connected to multiple wireless networks, including e.g., a 5G New Radio (NR) network and an Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN). The UE assigns one of the networks with a higher priority for connection. The UE monitors wireless signal metrics to determine if the priority assignment of the networks should be inverted. The UE may monitor the expected data throughput, e.g., determined based on the availability of carrier aggregation, the carrier aggregation order, the multiple in multiple out (MIMO) order, the available bandwidth, E-UTRAN NR- Dual connectivity (ENDC) availability, or quality metrics of wireless signals from one or both wireless networks. The UE may dynamically select a carrier subscription as the Default Data Subscription (DDS) based on the metrics as well as whether a wireless network associated with a carrier subscription supports ENDC.