Design and Implementation of TD-SCDMA Basestation Using Ring Network on Chip

This paper presents a case study of the complete baseband part of basestation that is designed and implemented using ring network on chip (ftNoC). By combining general-purpose and application-specific hardware, it is possible to integrate the complete baseband part of TD-SCDMA basestation on a single chip. In ftNoC, links are divided into two groups of ring, one of them used for fault-tolerance. Each group contains a control-ring and a data-ring. Control-ring propagates routing, link error and error control information of all nodes by packet-switching and data-ring propagates data by circuit-switching. Ring network adopts time-division multiplexing (TDM) and priority mechanism to implement space division multiplexing (SDM) of bandwidth and fair routing. Simulation results show the baseband part of TD-SCDMA designed using ftNoC perfectly accords with the requirement of TD-SCDMA at a network clock frequency of 200 MHz. And the architecture can efficiently avoid traffic congestion, deadlock and starvation and ensure full use of bandwidth.