Network Bridge Translating 48-bit and 64-bit MAC Addresses
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Solution Overview
Problem
The expansion of wireless communication networks has created a need for devices on different networks to communicate effectively, despite using different communication protocols, such as IEEE 802.3 and IEEE 802.15.4, where address size discrepancies and protocol format differences pose challenges for seamless bridging.
Innovation Solution
A computer-implemented method and network coordinator device that adapts MAC addresses and frame formats between IEEE 802.3 and IEEE 802.15.4 networks, using fragmentation and reassembly techniques, with dynamic address generation and table management to facilitate communication, and employing IEEE 802.1Q bridging for protocol translation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If network bridging is implemented between different protocols (IEEE 802.3 and IEEE 802.15.4), then compatibility and interconnection capability are improved, but device complexity and protocol translation overhead increase
Solution Approach 1:
The patent implements a network bridge device that acts as an intermediary between IEEE 802.3 and IEEE 802.15.4 networks. The bridge performs protocol translation, address mapping (48-bit to 64-bit MAC addresses), and frame format adaptation, enabling devices on different networks to communicate without modifying the devices themselves. This mediator approach resolves the contradiction by centralizing complexity in the bridge while maintaining simplicity at device level.
Solution Approach 2:
The patent changes key parameters including MAC address size (48-bit to 64-bit), frame format structure, and protocol headers to enable compatibility between IEEE 802.3 and IEEE 802.15.4 networks. The bridge dynamically adjusts these parameters based on the source and destination network type, allowing seamless protocol translation while managing complexity through systematic parameter transformation.
2Adaptability or versatility
If MAC address translation between 48-bit and 64-bit addresses is implemented, then address compatibility is improved, but address management complexity and translation overhead increase
Solution Approach 1:
The patent creates and maintains address translation tables that map 48-bit MAC addresses to 64-bit extended addresses and vice versa. The bridge copies and stores address mappings in lookup tables, enabling efficient translation without complex real-time computation. This copying approach simplifies address management by pre-establishing mappings that can be quickly referenced during frame forwarding.
3Adaptability or versatility
If data frame fragmentation is implemented to adapt to different MTU sizes, then frame format compatibility is improved, but processing overhead and potential data loss increase
Solution Approach 1:
The patent segments large data frames into smaller fragments that fit within the MTU constraints of IEEE 802.15.4 networks (typically 127 bytes payload). The bridge divides the original frame into multiple smaller frames, adds fragmentation headers with sequence numbers, and transmits them sequentially. This segmentation approach enables compatibility with different MTU sizes while managing complexity through systematic frame division and reassembly protocols.
Data Source
AI summary
A network coordinator device comprises a processor, a memory, a first port to operatively couple the processor to first network that uses media access control (MAC) addresses of a first size, and a second port to operatively couple the processor to second network that uses MAC addresses of a second size. The processor is configured to perform a network bridging protocol to bridge data frames communicated between the first network and the second network, including to translate communications between a device of the first network having the first size MAC address and a device of the second network having the second size MAC address, and adapt a frame format of the first network protocol to a frame format of the second network protocol. The adapting the frame formatting includes fragmenting data frames of the first network protocol when needed using a fragmentation format of the second network protocol.