Multi-RAT Backhaul Interface for Inter-Technology Handover
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current mobile networks lack a standardized backhaul interface for handovers between radio access technologies (RATs), limiting the ability to efficiently manage mobility and bandwidth distribution across different RATs, particularly when legacy RATs decline and new RATs require additional bandwidth.
Innovation Solution
The implementation of a multi-RAT backhaul interface enables communication between nodes of different RATs, allowing for handover management, load balancing, and carrier aggregation, which involves detecting the need for handover, providing handover information, and establishing a backhaul interface to route data packets between nodes, thereby supporting multi-RAT carrier aggregation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a backhaul interface is defined only for same-RAT neighboring nodes, then the system maintains simplicity and standardized protocols, but the ability to manage mobility and bandwidth across different RATs is limited
Solution Approach 1:
The patent applies universality by designing a backhaul interface that serves multiple RATs (LTE and 5G NR) through a unified architecture. The interface can dynamically adapt to different RAT combinations, allowing the same physical interface to handle inter-RAT and intra-RAT handovers, thereby improving multi-RAT adaptability without proportionally increasing complexity.
Solution Approach 2:
The patent introduces an intermediary function in the form of a multi-RAT controller or gateway that mediates between different RAT networks. This intermediary manages the complexity of inter-RAT communication by providing standardized protocols and translation layers, allowing seamless handovers while keeping individual RAT implementations relatively simple.
2Productivity
If legacy RAT bandwidth is not utilized by new RATs, then legacy RAT infrastructure can be maintained independently, but spectrum utilization efficiency decreases when legacy RAT traffic declines
Solution Approach 1:
The patent merges legacy RAT and new RAT bandwidth resources into a unified pool that can be dynamically allocated. When legacy RAT traffic declines, its freed bandwidth can be allocated to new RATs through the multi-RAT interface, improving overall spectrum utilization. The system combines resources from multiple RATs while managing them through a single coordination mechanism.
Solution Approach 2:
The patent implements dynamic bandwidth allocation where the amount of bandwidth assigned to each RAT changes based on real-time traffic demands. The system can dynamically shift spectrum resources from legacy to new RATs as conditions change, optimizing productivity while the coordination overhead remains manageable through automated resource management algorithms.
3Reliability
If handover between different RATs is not supported, then each RAT operates independently with simplified protocols, but load balancing and mobility management across RATs cannot be achieved
Solution Approach 1:
The patent creates a universal handover protocol that works across different RAT types. The same handover mechanisms and signaling procedures can be applied whether transitioning between LTE and 5G NR or within the same RAT, improving reliability by providing consistent mobility management while reducing the need for separate protocol implementations for each RAT combination.
Data Source
AI summary
A method and apparatus for mobility management, load management, sharing management and configuration update and setup in a mobile network having a first radio access technology node and a second radio access technology node, the first radio access technology node and the second radio access technology node communicating over a backhaul interface. In one aspect the method detects, at the first radio access technology node, that a handover for a user equipment to a new node is required; provides, from the first radio access technology node, handover information to the second radio access technology node over the backhaul interface; and performs the handover of the user equipment from the first radio access technology node to the new node.