Beam Failure Reporting for Multi-Connectivity Handover Optimization
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Solution Overview
Problem
Inappropriate handover parameter settings in LTE and NR systems lead to user experience degradation, network resource waste, and inefficient mobility robustness optimization (MRO) due to issues like ping-pong handover, handover failure, and radio link failure, with existing mechanisms failing to timely and accurately address these problems.
Innovation Solution
A method and apparatus for information transmission that enables network devices to perform mobility robustness optimization by exchanging information about radio link failures and beam failures between terminal devices and secondary cells, allowing for timely adjustments of mobility and resource configurations, including beam and carrier settings, to improve handover success rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If manual handover parameter setting is used in LTE system, then handover can be configured, but the process is very time-consuming and costly to update after initial network deployment
Solution Approach 1:
The system enables automatic handover parameter optimization through MRO mechanism. The network device automatically determines whether mobility parameters need optimization based on RLF reports and handover reports exchanged between network devices, eliminating the need for manual parameter setting and updating. The optimization is performed autonomously by the network device itself.
Solution Approach 2:
The system implements feedback mechanisms where terminal devices report radio link failure information and handover reports to network devices. The network device uses this feedback information to automatically adjust handover parameters, creating a closed-loop optimization system that continuously improves handover performance without manual intervention.
2Reliability
If RRM is used to detect problems and adjust mobility parameters, then some optimization can be achieved, but RRM cannot resolve all mobility robustness optimization problems
Solution Approach 1:
The optimization system is segmented into multiple functional components: problem detection module (using RLF reports and handover reports), parameter determination module (identifying specific mobility parameters needing optimization), and optimization execution module (adjusting parameters). This segmentation allows each component to specialize in specific aspects of MRO, enabling comprehensive problem resolution beyond what a single unified approach like RRM can achieve.
Solution Approach 2:
The MRO mechanism provides universal optimization capability across different network scenarios and failure types. The network device can handle various mobility robustness optimization problems including ping-pong handover, handover failure, and radio link failure by using a unified approach that processes different types of reports and applies appropriate optimization strategies, making the system versatile and adaptable to multiple problem types.
3Reliability
If existing MRO mechanism is used in multi-connectivity architecture, then mobility parameter optimization can be performed, but there is no good mechanism for accurately performing MRO in a timely manner
Solution Approach 1:
The system performs preliminary actions by collecting and storing handover reports and radio link failure information proactively. The network device prepares optimization decisions in advance based on accumulated data, so when optimization is needed, the process can be executed quickly and accurately without delays in data collection or analysis.
Solution Approach 2:
The handover report and radio link failure report act as intermediaries that carry critical information between terminal devices and network devices. These reports serve as the mediating data structures that enable timely and accurate MRO by consolidating necessary information in a standardized format that can be quickly processed by the network device.
Data Source
AI summary
The present disclosure relates to information transmission methods. In one example method, a first network device or a second network device triggers a terminal device to be handed over from a first cell to a second cell. The terminal device sends second information, where the second information includes information about a radio link failure that occurs between the terminal device and the second cell, or information about beam failure recovery that occurs between the terminal device and the second cell. The first network device or the second network device performs mobility robustness optimization based on the second information.