Single Card Dual Standby UE Power Reduction via LTE RF Shutdown
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Solution Overview
Problem
The absence of a circuit switched domain in LTE networks complicates the effective support of voice services and short message services, leading to increased power consumption and degraded user experience for single card dual standby user equipment that needs to maintain connections with both 2G/3G and LTE networks.
Innovation Solution
Implementing a method where the user equipment (UE) executes a routing area update process on the 2G/3G network when data traffic is low, allowing it to camp only on the 2G/3G network and turn off the LTE radio frequency unit, thereby reducing power consumption and improving user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE maintains connections with both 2G/3G and LTE networks simultaneously, then the UE can provide comprehensive network coverage and service continuity, but the power consumption increases significantly
Solution Approach 1:
The patent implements dynamic network selection by allowing the UE to switch between different network states (2G/3G only mode and dual standby mode) based on real-time conditions. The UE dynamically adjusts its network configuration by executing routing area update procedures to transition between camping on 2G/3G network and maintaining dual network connections, thereby optimizing power consumption while ensuring service continuity.
Solution Approach 2:
The patent changes the operational parameters of the UE by modifying the network attachment state. When data traffic conditions change, the UE updates its network parameters by executing routing area update procedures, transitioning between different network camping states. This parameter change enables the UE to adapt its power consumption levels to actual usage requirements while maintaining reliable service.
2Adaptability or versatility
If both 2G/3G and LTE radio frequency units are active simultaneously, then the UE can serve both circuit switched and packet switched domains effectively, but the device complexity and power consumption increase
Solution Approach 1:
The patent segments the network service functions by separating circuit switched domain (CS) and packet switched domain (PS) operations. The UE can execute routing area update procedures to camp on 2G/3G network for CS services while maintaining PS domain connectivity through LTE when needed. This segmentation allows the UE to activate only the necessary radio frequency units based on service requirements, reducing overall device complexity.
Solution Approach 2:
The patent applies partial action by allowing the UE to maintain only the necessary network connections based on actual service needs. Instead of always maintaining full dual standby capability, the UE can partially connect to 2G/3G network when data traffic is low and only activate LTE when packet switched services are required, thereby reducing the effective complexity of the radio frequency system.
3Use of energy by moving object
If the UE executes routing area update process to camp on 2G/3G network during low data traffic periods, then the power consumption is reduced, but the network switching complexity increases
Solution Approach 1:
The patent implements feedback mechanisms where the UE continuously monitors data traffic conditions and network status. Based on this feedback, the UE automatically decides whether to execute routing area update procedures to switch network camping states. The feedback loop includes monitoring data traffic volume, comparing it against threshold values, and triggering appropriate network switching actions, thereby managing complexity through automated decision-making.
Solution Approach 2:
The patent enables self-service by allowing the UE to autonomously manage its own network attachment state without requiring manual intervention. The UE self-evaluates its data traffic conditions and automatically executes routing area update procedures to optimize its network configuration. This self-service capability reduces the need for complex external control systems while maintaining intelligent power management.
Data Source
AI summary
Embodiments of the present invention disclose a method for a single card dual standby user equipment to camp on a network and a user equipment, so as to reduce power consumption of a user equipment. The method in the embodiment of the present invention includes: when a circuit switched domain CS domain of a UE camps on a second-generation mobile communications technology 2G/third-generation mobile communications technology 3G network and a packet switched domain PS domain camps on a long term evolution LTE network, executing, by the UE, a routing area update process of the PS domain of the 2G/3G network if the UE meets a preset first condition, so as to make the PS domain of the UE camp on the 2G/3G network; and after the PS domain of the UE camps on the 2G/3G network, turning off an LTE radio frequency unit.