Patent ID: 7453877

Claim:
A method for data traffic transmission on a synchronous digital network (SDH), comprising: A. adding a Resilient Packet Ring (RPR) processing module after an Ethernet interface; B. mapping an uplink Ethernet frame from the Ethernet interface to a RPR frame by the RPR processing module, wherein B comprises adding a RPR packet header to the uplink Ethernet frame to form the RPR frame by B1. analyzing an Ethernet frame destination address, and searching for a node number of an SDH node corresponding to the Ethernet frame destination address, filling the node number of the SDH node in a MAC NDA (MAC node destination address) field, filling the node number of the SDH node in a MAC NSA (MAC node source address) field, and adding a RPR header according to IEEE 802.17 protocol, and B2. based on said uplink Ethernet frame, filling an Other field of said RPR packet header; C. mapping the RPR frame to a SDH payload based on an encapsulation protocol; and D. stripping the RPR frame from a destination node at RPR, and recovering to its original Ethernet frame.