Design Mechanisms to Improve Data Packet Forwarding Efficiency in BT Mesh Networks

Based on IoT network security considerations, the BT mesh specification defines twice encryption for each data packets. One of the encryptions is in Network layer, it uses NetKey to separately encrypt DST (destination address) and Lower Transport PDU with AES encryption, and obfuscates SEQ (sequence number), SRC (source address), and TTL (time to live). However, the security mechanism may increase the packet process overhead of all relay nodes in mesh networks, and reduce packet forwarding efficiency. This paper will design a BT mesh routing, tag switching and adopt CRC-24 chained computing mechanisms concurrently to avoid the packet process overhead caused by the security mechanism and improve the forwarding efficiency of data packets at all relay nodes.