Dormant Measurement Reporting for Faster CA/DC Setup
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Solution Overview
Problem
Existing solutions for early measurement reporting in LTE Release 15 are limited by the inability to utilize the msg3 solution in all scenarios due to coverage and congestion limitations, preventing efficient setup of Carrier Aggregation (CA) and Dual Connectivity (DC).
Innovation Solution
The network indicates to the UE the method for reporting early measurements, either via msg3 or msg5, based on explicit or implicit indications such as system information, RACH configuration, or RRC messages, allowing the UE to transmit early measurements during the transition to RRC_CONNECTED state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If early measurements are reported via msg3, then the setup time for CA/DC is reduced, but the transmission reliability deteriorates due to coverage and congestion limitations
Solution Approach 1:
The patent implements dynamic selection between msg3 and msg5 for measurement reporting based on current radio conditions and network state. The network configures the UE to adaptively choose the reporting method, allowing the system to switch between fast reporting (msg3) and reliable reporting (msg5) depending on whether coverage and congestion conditions permit, thus resolving the contradiction between speed and reliability
Solution Approach 2:
The patent changes the reporting parameter (msg3 vs msg5) based on network conditions. The network provides configuration information that indicates which reporting method should be used, allowing the UE to adjust its behavior dynamically. This parameter change enables the system to optimize between speed and reliability by selecting the appropriate message type for current conditions
2Productivity
If the network configures multiple SCells for CA/DC setup, then the data throughput is improved, but the configuration time and signaling overhead increase
Solution Approach 1:
The patent performs measurement and evaluation actions in advance while the UE is in idle or inactive state. The UE measures candidate SCells and prepares measurement reports before the actual CA/DC setup is needed. When the network needs to configure CA/DC, the UE already has pre-collected measurement data ready for immediate use, significantly reducing the configuration time while enabling multiple SCells to be configured
Solution Approach 2:
The patent applies different measurement and reporting strategies to different candidate SCells based on their individual characteristics. The UE measures and evaluates each candidate cell locally, and the network can selectively configure only those SCells that meet specific quality thresholds, optimizing the balance between throughput improvement and configuration efficiency
Data Source
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AI summary
Systems and methods are disclosed herein that provide reporting of early measurements in a cellular communications system. Embodiments of a method performed by a wireless device are disclosed. Early measurements are also referred to herein as dormant mode measurements. In some embodiments, a method performed by a wireless device comprises performing one or more dormant mode measurements, where the one or more dormant mode measurements are one or more measurements performed by the wireless device while the wireless device is in a dormant mode. The method further comprises storing the one or more dormant mode measurements, identifying a reporting scheme to be used by the wireless device to report dormant mode measurements, and reporting at least one of the stored dormant mode measurements in accordance with the identified reporting scheme. Corresponding embodiments of a wireless device are also disclosed.