Patent ID: 7428211

Claim:
A data transmission apparatus used in a multiple service ring (MSR) including at least two nodes coupled to at least one aggregate pipe and at least one tributary, said apparatus comprising: a tributary TX framer coupled to said tributaries for converting data received from said tributaries into XP processing protocol data packets; a transmission setup module for setting-up information indicating the destination node address and destination tributary for XP packets to be transmitted; a TX framer for encapsulating said information indicating the destination node address and destination tributary and the XP packets into frames of the multiple service ring and transmitting the same along an aggregate pipe to a downstream neighbor node in the ring; a RX framer for receiving and deframing data frames of the multiple service ring from a upstream neighbor node along an aggregate pipe to obtain at least a destination node address and XP packets; a transiting module for transiting the frames destined to other nodes to said TX framer so as to forward the frames destined to other nodes to a next node; a destination tributary determining module for determining a destination tributary of the XP packets for local node; and a tributary RX framer for converting said XP packets for local node from the RX framer into data of format of local tributary and sending the local tributary data to a corresponding tributary determined by said destination tributary determining module, wherein said multiple service ring is based on RPR Lite, and said RX framer is RPR MAC RX framer and said TX framer is RPR MAC TX framer.