Research Of Efficient MAC And Reliable Communication Mechanism In WiNoC

The on-chip network is a new choice for on-chip interconnect due to its excellent communication efficiency and high scalability.WiNoC introduces a wireless link instead of a long-distance wired multi-hop communication link,which improves communication efficiency.Because application traffic has different characteristics in time and space,this thesis designs a priority-based token wireless medium access control mechanism,which not only adapts to the priority of data packets,but also ensures the orderly access of wireless channels.In addition,this thesis designs a wireless router architecture with shared buffers,and makes corresponding fault-tolerant measures for the wireless side.The detailed design is as follows:(1)This thesis defines the priority of the data packet based on the length of the data packet and the time of waiting for the token.Then a priority-based dynamic media access control mechanism is designed.The mechanism obtains the priority of the wireless node to send the data packet by the central control unit,and then dynamically authorizes the wireless medium usage right and allocates the transmission time according to the priority of different data packets.Compared with the traditional token mechanism,packets can be forwarded more efficiently and reasonably.(2)This thesis uses the occupancy rate of the buffer to determine whether the wired transmission end of the node is congested.When congestion occurs,a part of the buffer is shared to alleviate the congestion effect of the wired end;when there is no congestion,the shared buffer is handed over.Use the wireless sender to prevent congestion on the wireless side.This thesis guarantees the correctness of token reading through the internal three-mode redundancy design of the token unit.Design an end-to-end retransmission mechanism for the wireless end interface.When multiple dislocations occur,broadcast error messages to ensure reliable transmission of wireless data.