Wireless Frame Repeater Using Virtual Interfaces for Layer-2 Switching
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Solution Overview
Problem
Wireless bridging of local area networks (LANs) often introduces latency due to the need for level-3 routing functionality, which increases complexity and processing overhead in communications between distant buildings lacking a wired link.
Innovation Solution
A repeater device with wireless communications interfaces and a processor implements level-2 switching by initializing virtual interfaces between devices, establishing connections, and managing traffic as if the LANs were a single network, thereby reducing the need for complex routing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If level-3 routing functionality is implemented for wireless bridging, then connectivity between distant LANs is achieved, but latency increases due to processing overhead
Solution Approach 1:
The patent creates virtual interface copies that mimic physical interface behavior, allowing layer-2 switching to function across wireless connections. Virtual interfaces replicate the addressing and framing characteristics of physical interfaces, enabling Ethernet frames to be switched without conversion to routing protocols, thus reducing processing overhead and latency while maintaining connectivity.
Solution Approach 2:
The repeater device acts as an intermediary between distant LANs, implementing layer-2 switching functionality that bridges network segments without requiring full routing processing. By introducing this intermediate switching layer, the system achieves connectivity while minimizing the processing overhead associated with layer-3 routing operations.
2Reliability
If level-3 routing functionality is implemented, then network connectivity is established, but device complexity increases
Solution Approach 1:
By copying virtual interface characteristics from physical interfaces, the system maintains simple layer-2 switching logic without requiring complex routing table management, protocol conversion, or network address translation. This copying approach preserves the simplicity of bridge operation while achieving extended network connectivity.
Solution Approach 2:
The patent segments the networking function into distinct layer-2 switching operations handled by the repeater, separating it from layer-3 routing functions. This segmentation allows the repeater to maintain simple switching logic while achieving connectivity across multiple network segments, reducing overall device complexity.
Data Source
AI summary
A method includes: at a repeater device, implementing a network bridge between a first interface and a second interface of the repeater device; establishing a connection between the first interface and another communications controller of another computing device; establishing a further connection between the second interface and a further communications controller of a further computing device; and in response to establishing the further connection, initializing a virtual interface corresponding to the further communications controller.