Terminal Device MIMO Capability Adjustment for Inter-Frequency Measurement
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Solution Overview
Problem
Current terminal devices experience interruptions and poor user experience during inter-frequency or inter-RAT measurements due to the need for measurement gaps, which require suspending data services and increase costs.
Innovation Solution
The terminal device sends information to the network indicating its multiple-input multiple-output capability, allowing it to camp on multiple cells using carrier aggregation, and reports assistance information to avoid allocated measurement gaps, enabling network parameter measurements without interrupting data services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If measurement gap is allocated for inter-frequency or inter-RAT measurement, then measurement capability is improved, but data service is interrupted and user experience deteriorates
Solution Approach 1:
The patent applies dynamics by making the MIMO capability configurable and adjustable. The terminal device can dynamically change its MIMO capability state based on network conditions and measurement requirements, allowing it to switch between different operational modes (full MIMO capability vs. reduced capability during measurement) to balance measurement needs with data service continuity
Solution Approach 2:
The patent changes the MIMO capability parameter as a means to enable measurement without gap. By reporting assistance information that indicates reduced MIMO capability, the terminal device modifies its operational parameters to allow frequency measurement while maintaining data service, thereby resolving the contradiction between measurement capability and service continuity
2Measurement precision
If two radio frequency receivers are installed for inter-frequency measurement, then measurement capability is improved, but device cost increases
Solution Approach 1:
The patent makes the single radio frequency receiver universal by enabling it to perform both data reception and frequency measurement functions simultaneously through dynamic MIMO capability adjustment. By configuring the receiver to operate in a reduced MIMO mode during measurement, the same hardware resource serves multiple purposes, eliminating the need for additional dedicated measurement receivers
3Measurement precision
If measurement gap is allocated for inter-frequency or inter-RAT measurement, then measurement capability is improved, but device complexity increases
Solution Approach 1:
The patent applies self-service by enabling the terminal device to autonomously manage its MIMO capability configuration. The device can self-determine when to reduce MIMO capability for measurement purposes and self-report the assistance information to the network, reducing the need for complex network-side measurement gap allocation and simplifying the overall system complexity
Data Source
AI summary
A terminal device reports a measurement capability to a network side, and the network side determines, based on the capability of the terminal device and a trigger condition, whether a measurement gap needs to be allocated to the terminal device, where the measurement gap is used by the terminal device to measure an inter-frequency or inter-RAT cell. When the network side allocates the measurement gap to the terminal device, and when the terminal device determines that an objective of not allocating a gap can be achieved by de-configuring a secondary cell or reducing a data receiving rule of a currently camped-on cell. When an inter-frequency or inter-RAT cell is measured by de-configuring the secondary cell or reducing the data receiving rule of the currently camped-on cell, a cell measurement task can be completed.