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    • 7. 发明专利
    • Data transmission device, communication control method, and communication control program
    • 数据传输设备,通信控制方法和通信控制程序
    • JP2014033339A
    • 2014-02-20
    • JP2012172697
    • 2012-08-03
    • Toyota Motor Corpトヨタ自動車株式会社
    • HARA KOTARO
    • H04L29/06H04L12/28
    • G06F13/362G06F13/4221H04L12/40006H04L12/40032H04L12/4015H04L12/40163H04L12/4135H04L12/4625H04L12/6418H04L47/6215
    • PROBLEM TO BE SOLVED: To enable data having high priority in communication arbitration to be output to a bus before other data without excessively increasing a device load.SOLUTION: A data transmission device comprises: a data output unit for outputting data to a bus and determining whether or not to output the data to the bus on the basis of the result of communication arbitration conducted by using information on priority imparted to the data which the output unit itself is going to output to the bus and other contending data which is going to be output to the bus; a storage unit having stored therein a plurality of areas ranging in area priority from a high priority area to a low priority area; and a distribution unit for writing data requested for transmission into an appropriate area in the storage unit in order of area priority, higher the priority of data, the higher the area priority of the area into which the data is written. The output unit outputs the data stored in an area with higher area priority to the bus preferentially before other data among the data stored in the plurality of areas.
    • 要解决的问题:使得在通信仲裁中具有高优先级的数据在其他数据之前被输出到总线而不会过度增加设备负载。解决方案:数据传输设备包括:数据输出单元,用于向总线输出数据,并确定 是否根据通过使用对输出单元本身将输出到总线的数据的优先级的信息进行的通信仲裁的结果将数据输出到总线,以及将要被输出的其他竞争数据 输出到总线; 存储单元,其中存储从高优先级区域到低优先级区域的区域优先级的多个区域; 以及分发单元,用于按照区域优先级的顺序将请求传输的数据写入存储单元中的适当区域,数据的优先级越高,写入数据的区域的区域优先级越高。 输出单元优先在存储在多个区域中的数据中的其它数据之前将存储在具有较高区域优先级的区域中的数据输出到总线。