Triggering Link Quality Measurement Signal for Mobility Control
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Solution Overview
Problem
Current LTE systems face inefficiencies in link quality measurements due to continuous transmission of reference signals, leading to high resource usage, interference, and increased power consumption, which are exacerbated in future 5G networks with advanced antenna systems and higher carrier frequencies, necessitating a more controlled measurement and reporting mechanism.
Innovation Solution
A method where wireless devices receive measurement parameters specifying a triggering link quality measurement signal, allowing them to initiate measurements only when necessary, reducing unnecessary resource usage and interference by using a specific reference signal as a trigger for mobility measurements and reporting, thereby enabling detailed control over mobility measurement and reporting behavior without explicit per-measurement signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous transmission of reference signals is used for mobility measurements, then measurement reliability is improved, but resource usage increases and interference is generated
Solution Approach 1:
The patent implements periodic transmission of reference signals instead of continuous transmission. The network node transmits reference signals at specific periodic intervals, allowing wireless devices to perform mobility measurements only when signals are present. This reduces resource usage while maintaining measurement capability through periodic updates of neighbor cell quality information.
2Reliability
If continuous transmission of reference signals is used for mobility measurements, then measurement reliability is improved, but base station power consumption increases
Solution Approach 1:
The network node transmits reference signals periodically rather than continuously, reducing the time duration of signal transmission. This periodic transmission pattern lowers the base station's power consumption while still providing sufficient reference signals for wireless devices to perform accurate mobility measurements and maintain connection reliability.
3Measurement precision
If explicit per-measurement signaling is used for mobility measurements, then measurement control precision is improved, but signaling overhead increases
Solution Approach 1:
The patent makes the triggering reference signal serve dual functions: it acts as both the reference signal for mobility measurements and as the trigger that initiates the measurement process. This eliminates the need for separate explicit signaling to start measurements, reducing signaling overhead while maintaining precise control over when measurements occur through the inherent periodic transmission structure.
Data Source
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AI summary
The disclosure relates to methods, devices, and computer programs in mobile communications. More specifically, the proposed technique relates to measuring link quality using signals transmitted by the network for use by wireless devices. In particular the disclosure relates to enabling efficient measurements of such link quality measurement signals. This object is achieved by a method for handling link quality measurements, the method being performed by a wireless device in a wireless communication network. The method comprises receiving, from a network node in the wireless communication network, measurement parameters defining a triggering link quality measurement signal, detecting the triggering link quality measurement signal, and performing, in response to the detection of the triggering link quality measurement signal, measurements on other link quality measurement signals.