Multipath Label-Switched Paths for Wireless Backhaul Mobility
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Solution Overview
Problem
Mobile wireless backhauling in fast-moving systems, such as trains and buses, faces challenges due to dynamic network conditions and environmental RF interference, leading to packet losses and slow roaming between Wi-Fi standards, which are not adequately addressed by existing cellular technologies like LTE.
Innovation Solution
Establishing multiple label-switched paths (LSPs) between mobile nodes and access points in a wireless network, enabling redundant packet transmission and seamless handoffs, thereby ensuring reliable connectivity and packet delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If Wi-Fi backhauling is used in fast-moving systems, then connectivity can be provided to onboard devices, but packet losses occur due to dynamic network conditions and environmental RF interference
Solution Approach 1:
The system performs preliminary actions by establishing multiple label-switched paths (LSPs) before mobility events occur. These pre-established paths include backup routes that can be activated immediately when link failures are detected, eliminating the need for slow roaming procedures and ensuring continuous packet delivery during fast movement
Solution Approach 2:
The invention implements beforehand cushioning by creating redundant LSPs that serve as protective buffers against packet loss. When the primary wireless link experiences interference or failure, these pre-positioned alternative paths absorb the impact and maintain connectivity without interruption to ongoing communications
2Adaptability or versatility
If roaming between Wi-Fi access points is performed in fast-moving systems, then connectivity can be maintained, but handoff time is too slow causing message exchanges to complete before links break
Solution Approach 1:
Multiple LSPs are established in advance before the mobile node needs to handoff between access points. This preliminary path setup allows immediate switching to alternative routes without waiting for traditional roaming authentication and connection establishment, reducing handoff time to near-instantaneous levels
Solution Approach 2:
The label-switched path architecture introduces an intermediary layer that decouples the mobile node from direct access point dependencies. This intermediary routing infrastructure enables seamless path transitions without requiring the mobile node to complete slow Wi-Fi roaming protocols, effectively mediating between the mobile device and the wireless infrastructure
3Speed
If cellular technologies like LTE are used, then mobility support is provided, but they are not practical for fast-moving systems requiring high-speed connectivity
Solution Approach 1:
The system segments the backhauling function into multiple independent label-switched paths rather than relying on a single cellular connection. This segmentation allows the system to use Wi-Fi for high-speed data transmission while using the multipath architecture to handle mobility management, achieving both high speed and fast-moving system compatibility
Solution Approach 2:
The invention implements dynamic path selection and switching capabilities that adapt to the mobile node's velocity and position. The system continuously monitors link quality and automatically transitions between pre-established LSPs based on real-time conditions, enabling effective support for fast-moving systems with varying speed requirements
Data Source
AI summary
In one embodiment, a device identifies a plurality of access points of a wireless network. The device also identifies a plurality of mobile nodes of a mobile system. The device establishes a first label-switched path in the wireless network that comprises a wireless link between a first mobile node in the plurality of mobile nodes and a first access point in the plurality of access points. The device establishes a second label-switched path in the wireless network that comprises a wireless link between a second mobile node of the mobile system and a second access point in the plurality of access points.