D2S Measurement Gap Configuration for Non-Serving Carrier Synchronization
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Solution Overview
Problem
Current technologies lack procedures for Device-to-Device (D2D) operation on non-serving carriers, leading to synchronization challenges and inefficient resource utilization, as D2D communication requires synchronization with different timing and frequency, which is not supported by existing methods.
Innovation Solution
The method involves determining the synchronization status of a wireless device with a non-serving cell and configuring appropriate measurement gaps to allow for D2D operation, either using a first measurement gap configuration for synchronized devices or a second, extended configuration for unsynchronized devices, ensuring efficient synchronization and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If D2D operation is performed on non-serving carrier frequency, then D2D communication capability is improved, but synchronization difficulty increases
Solution Approach 1:
The network node configures measurement gaps before D2D operation on non-serving carrier frequency, allowing the wireless device to perform synchronization measurements in advance. This preliminary action enables the device to acquire timing and frequency synchronization information from the non-serving cell before actual D2D communication begins, resolving the synchronization difficulty.
Solution Approach 2:
The patent introduces measurement gaps as an intermediary mechanism between the serving cell and non-serving cell operations. During these gaps, the wireless device temporarily suspends serving cell reception to tune to the non-serving carrier frequency and perform synchronization measurements, effectively mediating the transition and enabling D2D operation without direct interference from serving cell activities.
2Measurement precision
If measurement gaps are configured for D2D operation, then synchronization accuracy is improved, but resource utilization efficiency deteriorates
Solution Approach 1:
The measurement gap configuration is made dynamic and adaptive based on the wireless device's synchronization status. The network node monitors whether the device is synchronized to the non-serving cell and adjusts the measurement gap configuration accordingly - reducing or eliminating gaps when synchronized, and increasing gaps when not synchronized. This dynamic adjustment maintains synchronization accuracy while optimizing resource utilization efficiency.
3Reliability
If extended measurement gap configuration is used for unsynchronized devices, then synchronization reliability is improved, but communication interruption increases
Solution Approach 1:
Extended measurement gaps are configured in advance for unsynchronized devices to perform comprehensive synchronization measurements before D2D operation begins. This preliminary synchronization action ensures reliable timing and frequency alignment, preventing subsequent communication interruptions caused by synchronization failures.
Solution Approach 2:
The network node changes the measurement gap parameters (duration and frequency) based on the wireless device's synchronization status. For unsynchronized devices, extended gaps with longer duration are configured to ensure reliable synchronization. Once synchronized, the parameters are adjusted to shorter gaps or normal operation, reducing communication interruptions while maintaining synchronization reliability.
Data Source
AI summary
Systems and methods are disclosed herein that relate to configuration of measurements gaps to be applied by a wireless device for a non-serving carrier on which the wireless device intended or is expected to perform Device-to-Device (D2D) operations. In some embodiments, a method of operation of a network node comprises determining whether a wireless device that is configured with a serving cell that operates on a first frequency is synchronized to a non-serving cell that operates on a second frequency, which is a non-serving frequency. The method further comprises determining whether to configure the wireless device to apply a first or second measurement gap configuration based upon whether the wireless device is synchronized to the non-serving cell and transmitting information to the wireless device that configures the wireless device to apply the determined measurement gap configuration.